Skocz do pozycji: 1.

Tytuł:

Hadrosaur trackways from the Lower Cretaceous of Canada

Autorzy:

Currie, P.J.

Powiązania:

https://bibliotekanauki.pl/articles/20808.pdf

Data publikacji:

1983

Wydawca:

Polska Akademia Nauk. Instytut Paleobiologii PAN

Opis:

The most common ichnogenus in the Peace River Canyon is Amblydactylus, a large bipedal herbivore. The morphology of the hand and footprints suggest that the tracks and trackways were made by hadrosaurs, and the ichnites might represent the earliest record of these dinosaurs. Amblydactylus tracks were made in a wide variety of depositional environments, including the mud beneath several metres of water. Juveniles were gregarious and stayed together after hatching until they were large enough to join herds of more mature animals. Hadrosaur herds appear to have walked side by side, seldom crossing paths, although there was little structure to the herds when they were in the water and/or feeding. Calculation of the walking speeds indicate that the herbivores were generally slower than the carnivores.

Źródło:

Acta Palaeontologica Polonica; 1983, 28, 1-2
0567-7920

Pojawia się w:

Acta Palaeontologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 2.

Tytuł:

Dark States and De Broglie Wave Optics

Autorzy:

Metcalf, H.

Powiązania:

https://bibliotekanauki.pl/articles/1968529.pdf

Data publikacji:

1998-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

32.80.Pj

Opis:

The techniques of laser cooling have now become sufficiently developed that the focus has shifted toward interesting applications such as the quantum domain of atomic motion. This topic is characterized by the failure of the classical description in which atoms move as point particles whose trajectories can be known: instead, atomic motion must be described as the optics of de Broglie waves. For example, when the de Broglie wavelength λ$\text{}_{dB}$ exceeds λ$\text{}_{optical}$, then a classical description is insufficient (Bose condensation is done in the dark, and the quantum condition becomes λ$\text{}_{dB}$ > nearest neighbor distance). One of the most fascinating topics of quantized atomic motion in a laser field derives from optical dark states that can even occur in the simplest (two-level) atoms, where there are no magnetic sublevels and the polarization is irrelevant. In spite of the simplicity of this two-level atom case however, the more interesting cases occur in multilevel atoms where the internal magnetic states and external quantum states of atomic motion become truly entangled. Schrödinger called such states "the heart of quantum mechanics" because they led to puzzles such as his famous "cat" and the EPR paradox.

Źródło:

Acta Physica Polonica A; 1998, 93, 1; 147-157
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 3.

Tytuł:

Semiclassical Motion of Systems with Internal States

Autorzy:

Stenholm, S.

Powiązania:

https://bibliotekanauki.pl/articles/1931389.pdf

Data publikacji:

1994-07

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

32.80.Pj
03.65.Sq

Opis:

In many fields of atomic and molecular physics we need to combine the center-of-mass motion with internal degrees of freedom. In this work, the classical motion in phase space is separated from the quantum processes by a multiple-time-scale approach. The expansion parameter is proportional to Planck's constant. The theory is given and illustrated by examples: the semiclassical description of a particle without internal states, the extraction of a classical trajectory and the derivation of the light-induced force.

Źródło:

Acta Physica Polonica A; 1994, 86, 1; 51-60
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 4.

Tytuł:

Functional Corrosion-Resistant Enamel Coatings and Their Adherence Strength

Autorzy:

Berdzenishvili, I.

Powiązania:

https://bibliotekanauki.pl/articles/1490977.pdf

Data publikacji:

2012-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.05.Pj

Opis:

Functional corrosion-resistant glass enamel coatings make it possible to protect inner surface of oil pipelines in extreme operating conditions. The aim of this study is to propose competitive fluorine-free coatings for energy-effective direct-on enameling technology of pipes. The enamel coatings were applied on the steel surface by the slip method (coatings thickness 450 μm). Their physicochemical and production parameters were defined. The strong adhesion of synthesized enamels to the steel substrate has been achieved by using of the complex adherence promoter, containing optimal quantity of CoO and CuO oxides. The coatings forming mechanism on steel substrate by flexible regime 1 coat-1 firing have been studied. It is established that high level of the coating adhesion is the result of a complex heterogeneous interaction of metal with oxide melt, dissolution and diffusion processes and, as a consequence, intermediate layer formation at the phases boundary during melting (770 - 780°C). As a result of conducted research, obtained nonnickel rust-resistant glass enamels have been accepted for production of steel pipes with enameled surface.

Źródło:

Acta Physica Polonica A; 2012, 121, 1; 178-180
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 5.

Tytuł:

"To Bring You My Love". P.J. Harvey dekonstruuje mity bluesa
"To Bring You My Love". P.J. Harvey deconstructs the myths of blues

Autorzy:

Kuźnicki, Sławomir

Powiązania:

https://bibliotekanauki.pl/articles/51532146.pdf

Data publikacji:

2024

Wydawca:

Uniwersytet Komisji Edukacji Narodowej w Krakowie

Tematy:

P.J. Harvey
blues
seks
płeć
mit
sex
gender
myth

Opis:

Niniejszy artykuł stanowi próbę interpretacji wybranych pieśni P.J. Harvey z płyty To Bring You My Love z 1995 roku. Na płycie tej piosenkarka mierzy się z tradycją bluesa, głównie z jego literackimi mitami. W swych poetyckich tekstach Harvey podkreśla ogromny ładunek erotyzmu i przemocy drzemiący w mitologiach bluesa; raz typowo męski, kiedy indziej podkreślający emancypacyjny pierwiastek kobiecy. Na takiej bazie udaje się artystce zarówno przedefiniować owe mitologie, jak i niejako przywrócić temu gatunkowi jego kobiecy wymiar.
The article’s goal is to interpret the selected songs from P.J. Harvey’s album To Bring You My Love (1995). On the album, the singer-songwriter struggles with the tradition of blues, mostly with its literary myths. In her lyrics, Harvey emphasizes the prevalent eroticism and violence present in blues mythologies—often male but, in some cases, subversively female. This tradition becomes the foundation on which she manages to filter those mythologies and simultaneously reintroduce the female dimension to this music.

Źródło:

Annales Universitatis Paedagogicae Cracoviensis. Studia de Cultura; 2024, 16, 1; 99-109
2083-7275

Pojawia się w:

Annales Universitatis Paedagogicae Cracoviensis. Studia de Cultura

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 6.

Tytuł:

Development of Machinable Glass-Ceramics Produced from Vermiculite

Autorzy:

Önen, U.
Ercenk, E.
Yılmaz, Ş.

Powiązania:

https://bibliotekanauki.pl/articles/1033368.pdf

Data publikacji:

2017-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.05.Pj

Opis:

In this study, machinable glass-ceramics were produced from vermiculite and K₂CO₃, SiO₂, Al₂O₃ and MgF₂ as additives by melting process. The starting materials were mixed together and milled in a mill with alumina ball for 2 h. The mixed powders were melted by aluminum crucible at 1500°C. The melted glass was cast into graphite mold, and then it was exposed to crystallization heat treatment for glass-ceramic transformation. The glass-ceramic samples were characterized with X-ray diffraction analysis, scanning electron microscopy, mechanical tests such as hardness, fracture toughness and machinability test. The results indicate that machinability properties can be obtained from vermiculite based glass-ceramic with some additives.

Źródło:

Acta Physica Polonica A; 2017, 131, 1; 168-170
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 7.

Tytuł:

Skrzydlaci górale : HKL "Trawers"

Autorzy:

PJ.

Powiązania:

Komandos 1997, nr 4, s. 92-93

Data publikacji:

1997

Tematy:

Harcerskie Koło Lotnicze "Trawers" szkolenie
Harcerstwo szkolenie Polska
Szkolenie spadochronowe Polska

Opis:

Fot.

Dostawca treści:

Bibliografia CBW

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 8.

Tytuł:

Mechanical properties of some granular agricultural materials used in silo design

Autorzy:

Moya, M.
Aguado, P.J.
Ayuga, F.

Powiązania:

https://bibliotekanauki.pl/articles/26147.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Opis:

The aim of this research was to provide values for different material properties considered in either traditional or more recent numerical silo design methods. Different samples of granular agricultural materials commonly stored in silos were tested. Common geotechnical devices have been used in order to make the replications easier. Based on these experiments it was determined that the different material properties were not affected by the test velocity, except in the case of Poisson ratio. From a practical point of view, the test velocity correlates well with the sliding velocity of grain during discharge. The values obtained for material properties considered in traditional silo design methods were similar to those reported by other authors. No significant differences were observed in the results obtained when using either the square shear box or the circular shear cell. The same conclusion was reached when comparing the results from direct shear tests with preconsolidated and unconsolidated samples. This means that simplified devices and procedures can be used in agricultural grains against other products. Finally, a table with the recommended values for the different parameters determined for each sample tested was provided in this work.

Źródło:

International Agrophysics; 2013, 27, 2
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 9.

Tytuł:

Bose-Einstein Condensation in Atomic Gases

Autorzy:

Zachorowski, J.
Gawlik, W.

Powiązania:

https://bibliotekanauki.pl/articles/2035582.pdf

Data publikacji:

2002

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

03.75.Fi
32.80.Pj
39.25.+k

Opis:

This paper presents fundamental principles, characteristics, and limitations of various experimental methods of cooling and trapping of neutral atoms by laser light and magnetic fields. In addition to surveying the experimental techniques, basic properties of quantum degenerate gases are discussed with particular emphasis on the Bose-Einstein condensate. We also present main parameters and expected characteristics of the first Polish Bose-Einstein condensate apparatus built in the National Laboratory of Atomic, Molecular, and Optical Physics in Toruń, Poland.

Źródło:

Acta Physica Polonica A; 2002, 102, 4-5; 577-596
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 10.

Tytuł:

Mała rybka - wielkie wyzwania

Autorzy:

Korzeniowski, P.J.
Wiweger, M.

Powiązania:

https://bibliotekanauki.pl/articles/856836.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Przyrodników im. Kopernika

Tematy:

organizmy modelowe
ryby
danio pregowany
Danio rerio
badania modelowe
hodowla zwierzat

Źródło:

Wszechświat; 2016, 117, 10-12
0043-9592

Pojawia się w:

Wszechświat

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 11.

Tytuł:

Optical Sensor to Monitor Pupillary Light Reflex

Autorzy:

Różanowski, K.
Murawski, K.

Powiązania:

https://bibliotekanauki.pl/articles/1399401.pdf

Data publikacji:

2013-09

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

42.66.Ct
42.30.Va
07.05.Pj

Opis:

The aim of the paper is to describe design of an optical sensor intended to analyze pupillary light reflex. It also presents the results of physiological adaptation mechanisms in human eye, i.e. response of the iris to changes in the intensity of light that falls on the retina of the eye under conditions of sensory deprivation. Pupillary light reflex is a closed loop nerve reflex. It controls the amount of light that reaches the retina. Based on the test results, an optical sensor was designed, fabricated and correctly calibrated. In comparative tests with the use of $F^2D$ Fit-For-Duty, a commercial system by AMTech, selected pupillographic parameters were primarily evaluated (baseline pupil diameter, oscillations, reflex latency, maximum reaction time, pupil constriction time, pupil dilation time, and constriction amplitude) under conditions of diminished alertness, reduced ability to concentrate, increasing fatigue, and drowsiness. The solution comes as part of a mobile pupillography device intended to be assembled in cars and airplanes to identify conditions of lower alertness, reduced ability to concentrate, increasing fatigue and drowsiness in drivers, pilots and traffic controllers, and to trigger alarm and preventive measures, if necessary.

Źródło:

Acta Physica Polonica A; 2013, 124, 3; 558-562
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 12.

Tytuł:

Palm vein authentication and verification system

Autorzy:

Cömert, M.
Yildiz, A.

Powiązania:

https://bibliotekanauki.pl/articles/1068544.pdf

Data publikacji:

2016-07

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

07.05.Pj
42.30.Sy
42.30.Tz

Opis:

In this work, both hardware and software of a palm vein capture system have been designed and a prototype is produced. By using this system, a genuine database was created with age and gender information of volunteered test subjects. Widely used pre-processing, acquisition of feature vectors, and classification methods were tested on the database and results are compared with speed versus accuracy. All the modules used in hardware and software were determined as open source. Python has been chosen as a software module programming on a single board computer with Linux kernel. As a result, an appropriately running system has been built with both secure software and hardware interfaces having maximum accuracy at 95.33% while specificity is at 100%.

Źródło:

Acta Physica Polonica A; 2016, 130, 1; 175-177
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 13.

Tytuł:

Influence of Organic Pollutants on Deterioration of Antique Glass Structure

Autorzy:

Greiner-Wronowa, E.

Powiązania:

https://bibliotekanauki.pl/articles/1493356.pdf

Data publikacji:

2011-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.05.Pj
61.43.Fs

Opis:

The state of glass artifacts preserved in museums is strongly dependent on strictly local parameters. The deterioration of antique glass brought on by organic compound activity which will receive attention in this work has been studied on a sample of a 18th c. glass beaker belonging to the National Museum in Kraków. Measuring of the corrosion was carried out on an original, as well as on a model (or sensor) glass. The former - the remains of an 18th c. beaker - was borrowed from the Museum. The latter is a modern sample. Both samples were tested with a non-destructive method. Glass sensors, the chemical composition of which corresponded to the analyzed objects, were prepared. Their purpose was to facilitate the study of corrosion induced by different chemicals and altered physical conditions, previously proved in the museum real circumstances. The chemical structure of glass before and after the induced corrosion processes in formaldehyde and acetic acid solution was examined by the Fourier transform infrared and Raman spectroscopy. Moreover, complementary tests by scanning electron microscopy, energy dispersive microscopy, confocal microscopy were carried out as well. The corrosion processes were realized by means of shock temperature changes, as well as altering of relative humidity. Parallel corrosion processes under halogen lamp radiation were also induced. Measurements of induced corrosion pointed to the fact that deterioration of glass depends not only on the concentration of corroding media, but also on thermal shock. An experiment involving the lighting of an object by halogen lamp isolated a very important agent, which has significant influence on glass deterioration. The intensity of the induced corrosion resulted, in some cases, in glass volume corrosion as well. The obtained information can be useful for curators and conservators, as any resulting glass changes are responsible for further, this time irreversible, alterations.

Źródło:

Acta Physica Polonica A; 2011, 120, 4; 803-811
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 14.

Tytuł:

Measurement of Membrane Displacement Using a Motionless Camera

Autorzy:

Murawski, K.

Powiązania:

https://bibliotekanauki.pl/articles/1402304.pdf

Data publikacji:

2015-07

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

06.30.Bp
07.05.Pj
07.07.Df

Opis:

The paper presents a technique for measuring membrane displacements with one motionless camera. The method relies on measuring the distance to an object based on one image obtained from a motionless camera with a fixed-focus lens. It is proven that the used technique allows monitoring the frequency and amplitude of vibration. The tests were performed for the oscillation frequency in the range from 0.5 Hz to 6 Hz and deviations from the neutral position in the range of ± 3 mm.

Źródło:

Acta Physica Polonica A; 2015, 128, 1; 10-14
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 15.

Tytuł:

Perspektywy Lolium perenne w uzytkowaniu trawnikowym i darniowym

Autorzy:

Domanski, P.J.
Golinska, B.

Powiązania:

https://bibliotekanauki.pl/articles/75716.pdf

Data publikacji:

2003

Wydawca:

Polskie Towarzystwo Łąkarskie

Tematy:

zycica trwala
trawniki
Lolium perenne
lakarstwo
odmiany roslin

Źródło:

Łąkarstwo w Polsce; 2003, 06; 37-45
1506-5162

Pojawia się w:

Łąkarstwo w Polsce

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 16.

Tytuł:

Michelson Interferometer Based Displacement Measurement Using Video Processing

Autorzy:

Bocekci, V.
Varol, H.

Powiązania:

https://bibliotekanauki.pl/articles/1193983.pdf

Data publikacji:

2015-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

07.60.Ly
81.05.Bx
07.05.Pj

Opis:

In this study, investigation of video processing method which is a new technique for precision displacement measurement is presented. The video processing method was integrated with an interferometric system and the thermal expansion results and linear thermal expansion coefficients of a heated sample metals were compared with theoretical results. Michelson interferometer setup was used in our study due to its advantages in precision displacement information of a visual output, called interferograms. In the experimental studies, signals of interferograms containing displacement information were obtained from the measurement system. The amount of displacement in the sample metals under the temperature variation due to thermal expansion was measured with the analysis program, written in Matlab/Simulink environment, with a micrometer precision. The measured displacement amounts were compared with the results of theoretical calculations. According to the theoretical values, the relative error of the values measured with video processing based method, was found found to be 0.3%

Źródło:

Acta Physica Polonica A; 2015, 127, 4; 934-936
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 17.

Tytuł:

New Vision Sensor to Measure and Monitor Gas Pressure

Autorzy:

Murawski, K.

Powiązania:

https://bibliotekanauki.pl/articles/1402303.pdf

Data publikacji:

2015-07

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

06.30.Bp
07.05.Pj
07.07.Df

Opis:

The paper presents the construction and the use of a video sensor developed to measure air pressure. A characteristic feature of the device is pressure measurement based on digital image processing and self-diagnostics performed on the basis of an image. The paper presents the results of sensor calibration and measurements taken during the tests. It has been shown that the developed video-manometer model that is equipped with a flat diaphragm allows measuring the air pressure in the range of 0-100 mbar with an error less than 2%.

Źródło:

Acta Physica Polonica A; 2015, 128, 1; 6-9
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 18.

Tytuł:

An Improved Method of Linear Travel-Time Interpolation Ray Tracing Algorithm

Autorzy:

Hao-Quan, W.

Powiązania:

https://bibliotekanauki.pl/articles/1535590.pdf

Data publikacji:

2010-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

07.05.Pj
42.30.Wb
43.60.+d

Opis:

The linear travel-time interpolation algorithm is improved by the method of ray tracing based on finite difference scheme of eikonal equation. It can simulate the more complex medium. Using the algorithm to calculate travel-time and paths of tracing rays, it is more rapid and accurate than the other conventional methods. The linear travel-time interpolation ray tracing algorithm has a drawback: rays cannot go round the low velocity area if the launching point, the receiving point and the low velocity area distribute on the same column (row). Aiming at the drawback, an improved algorithm is proposed on the basis of researching reconstruction theories. The given algorithm adopts a cross-scanning strategy to carry out forward processing and uses discrete points as the secondary sources to simplify backward processing. The numerical simulation experiments show that the rays can go round the low velocity areas located in the same column (row) of the launching points and the receiving points. Rays scan over the global region only once.

Źródło:

Acta Physica Polonica A; 2010, 118, 4; 521-526
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 19.

Tytuł:

On the Dipole-Induced Resonance Motion in a Paul Trap

Autorzy:

Niculae, C. M.

Powiązania:

https://bibliotekanauki.pl/articles/1992717.pdf

Data publikacji:

1998-11

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

32.80.Pj
52.58.Qv
52.65.Cc

Opis:

The problem of resonant motion induced by the dipole component of the antisymmetric potential function in a radiofrequency Paul trap is investigated here. We show that, at low-level additional rf-voltage, the line-shape and the increasing rate of its amplitude, for the ion-excitation phenomenon, can be derived from the dipole approximation of the antisymmetric term in the potential energy. This approximation does not take into account the observed line-shift.

Źródło:

Acta Physica Polonica A; 1998, 94, 5-6; 719-724
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 20.

Tytuł:

High Resolution Spectroscopy of Cold, Trapped Atoms

Autorzy:

Brzozowski, T.
Brzozowska, M.
Zachorowski, J.
Gawlik, W.

Powiązania:

https://bibliotekanauki.pl/articles/1814200.pdf

Data publikacji:

2007-11

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

32.80.Pj
42.50.Vk
42.65.-k

Opis:

Pump-probe spectroscopy of cold, trapped atoms is discussed with particular attention to mechanisms specific for cold atoms and potential diagnostics applications. The discussion is illustrated with experimental results obtained with $\text{}^{85}Rb$ atoms trapped in a magneto-optical trap. Most important applications are non-destructive, real-time velocimetry (thermometry) and analysis of optical lattice dynamics.

Źródło:

Acta Physica Polonica A; 2007, 112, 5; 783-790
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 21.

Tytuł:

Pattern Recognition Algorithm for Eye Tracker Sensor Video Data Analysis

Autorzy:

Murawski, K.
Różanowski, K.

Powiązania:

https://bibliotekanauki.pl/articles/1399387.pdf

Data publikacji:

2013-09

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

42.30.Sy
42.30.Va
07.05.Pj

Opis:

The aim of the paper is to discuss research conducted at the Military University of Technology as well as the Military Institute of Aviation Medicine. The essence of the research is to develop a pattern recognition algorithm for the analysis of data received from an eye tracker sensor. Data analysis can be done using computer vision algorithms. In the article the state of the art pattern recognition algorithms were presented. Particular attention was paid to the possibilities and limitations of their use. The main part of the paper is the presentation of the author's pattern recognition algorithm. In the paper we have also shown the results obtained by other techniques of image processing, which are frequently used to determine the position of the pupil of the eye on the image.

Źródło:

Acta Physica Polonica A; 2013, 124, 3; 509-512
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 22.

Tytuł:

Oviraptorosaur tail forms and functions

Autorzy:

Persons,IV, W.S.
Currie, P.J.
Norell, M.A.

Powiązania:

https://bibliotekanauki.pl/articles/945893.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Instytut Paleobiologii PAN

Tematy:

Dinosauria
paleozoology
Theropoda
Oviraptorosauria
oviraptorosaur
pygostyle
caudal musculature
functional morphology

Opis:

Oviraptorosaur caudal osteology is unique among theropods and is characterized by posteriorly persistent and exceptionally wide transverse processes, anteroposteriorly short centra, and a high degree of flexibility across the pre-pygostyle vertebral series. Three-dimensional digital muscle reconstructions reveal that, while oviraptorosaur tails were reduced in length relative to the tails of other theropods, they were muscularly robust. Despite overall caudal length reduction, the relative size of the M. caudofemoralis in most oviraptorosaurs was comparable with those of other non-avian theropods. The discovery of a second Nomingia specimen with a pygostyle confirms that the fused terminal vertebrae of the type specimen were not an abnormality. New evidence shows that pygostyles were also present in the oviraptorosaurs Citipati and Conchoraptor. Based on the observed osteological morphology and inferred muscle morphology, along with the recognition that many members of the group probably sported broad tail-feather fans, it is postulated that oviraptorosaur tails were uniquely adapted to serve as dynamic intraspecific display structures. Similarities, including a reduced vertebral series and a terminal pygostyle, between the tails of oviraptorosaurs and the tails of theropods widely accepted as basal members of the Avialae, appear to be convergences.

Źródło:

Acta Palaeontologica Polonica; 2014, 59, 3; 553-567
0567-7920

Pojawia się w:

Acta Palaeontologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 23.

Tytuł:

Theropod dinosaurs from the Upper Cretaceous of the South Pyrenees Basin of Spain

Autorzy:

Torices, A.
Currie, P.J.
Canudo, J.I.
Pereda-Suberbiola, X.

Powiązania:

https://bibliotekanauki.pl/articles/20400.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Instytut Paleobiologii PAN

Opis:

The dinosaur record in the South Pyrenees Basin is diverse and rich. A total of 142 theropod teeth were studied for this paper, which constitutes one of the richest samples for these remains in Europe. Eight upper Campanian to upper Maastrichtian outcrops from the Pyrenees produced six non-avian theropod taxa (Theropoda indet., Coelurosauria indet., ?Richardoestesia, ?Dromaeosauridae indet., ?Pyroraptor olympius, ?Paronychodon). These six taxa are added to two previously described theropods (a Richardoestesia-like form and a possible ornithomimosaurid), indicating that there was considerable theropod diversity on the Iberian Peninsula during the Late Cretaceous.

Źródło:

Acta Palaeontologica Polonica; 2015, 60, 3
0567-7920

Pojawia się w:

Acta Palaeontologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 24.

Tytuł:

Nonlinear Spectroscopy of Cold, Trapped Atoms

Autorzy:

Zachorowski, J.
Brzozowski, T.
Pałasz, T.
Zawada, M.
Gawlik, W.

Powiązania:

https://bibliotekanauki.pl/articles/2030297.pdf

Data publikacji:

2002-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

32.80.Pj
42.65.An
42.65.Hw

Opis:

We report on our studies of atoms contained in a magneto-optical trap using the nonlinear spectroscopy methods. Absorption and four-wave mixing signals are recorded for the probe frequency near the cooling transition frequency and the two methods are compared. The differences in the signal structure and their sensitivity on external conditions are discussed. It is revealed that central feature of these spectra consists of several contributions of different origin.

Źródło:

Acta Physica Polonica A; 2002, 101, 1; 61-75
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 25.

Tytuł:

Unsupervised method for building detection using Gabor filters

Autorzy:

Daamouche, A.
Fares, D.
Maalem, I.
Zemmouri, K.

Powiązania:

https://bibliotekanauki.pl/articles/1068632.pdf

Data publikacji:

2016-07

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

07.05.Pj
42.30.Sy
42.68.Wt

Opis:

Automatic methods are a convenient solution to extract buildings from remote sensing images. In this paper, we propose an unsupervised method to extract buildings by means of the Gabor filters and morphological operators. Our proposed method starts from a set of the Gabor filter parameters which is selected empirically to generate a two-dimensional impulse response. The convolution of the impulse response with the image of interest enhances the buildings and attenuates the background. Moreover, morphological operators are applied to further refine the resulting class of interest. The developed algorithm is applied on many remotely sensed images; the obtained results are highly satisfactory and promising.

Źródło:

Acta Physica Polonica A; 2016, 130, 1; 28-29
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 26.

Tytuł:

Ordered Structures in a Variable Length A.C. Trap

Autorzy:

Gheorghe, V. N.
Giurgiu, L.
Stoican, O.
Cacicovschi, D.
Molnar, R.
Mihalcea, B.

Powiązania:

https://bibliotekanauki.pl/articles/1968878.pdf

Data publikacji:

1998-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

32.80.Pj

Opis:

A variable length linear trap operating between 20-1000 Hz under standard temperature and pressure conditions is reported. We simulated and observed various kinds of stable patterns: linear strings, planar zig-zag and volume structures. The interparticle distances depend on the trapped particle number and trap length. Our setup allows trapped microparticle diagnosis by various methods.

Źródło:

Acta Physica Polonica A; 1998, 93, 4; 625-629
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 27.

Tytuł:

Sklad chemiczny pierwszego odrostu odmian Lolium perenne w zroznicowanych warunkach siedliskowych

Autorzy:

Domanski, P.J.
Gospodarczyk, F.
Nowak, W.

Powiązania:

https://bibliotekanauki.pl/articles/75815.pdf

Data publikacji:

2003

Wydawca:

Polskie Towarzystwo Łąkarskie

Tematy:

warunki siedliskowe
sklad chemiczny
zycica trwala
trawy
Lolium perenne

Źródło:

Łąkarstwo w Polsce; 2003, 06; 201-207
1506-5162

Pojawia się w:

Łąkarstwo w Polsce

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 28.

Tytuł:

Research and Parameter Optimization of the Pattern Recognition Algorithm for the Eye Tracking Infrared Sensor

Autorzy:

Murawski, K.
Różanowski, K.
Krej, M.

Powiązania:

https://bibliotekanauki.pl/articles/1399388.pdf

Data publikacji:

2013-09

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

07.05.Pj
02.60.Pn

Opis:

The paper presents the process and results of tests of the pattern recognition algorithm. The algorithm has been developed for the sensor to track the activity of the eyes. The study was conducted on a group of ten people. The group was selected, so that it was possible to determine the influence of gender, age, eye color, contact lenses and glasses on the result of the algorithm. The object of the study was also to optimize the pattern recognition algorithm in terms of CPU utilization. For this purpose the duration of the algorithm steps were measured as a function of the allocation of tasks to multiple processor cores.

Źródło:

Acta Physica Polonica A; 2013, 124, 3; 513-516
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 29.

Tytuł:

Corrective factors of intestinal microflora disorders in the perinatal period

Autorzy:

Pisaniak, P.
Huflejt, M.
Gurowiec, P.J.
Ozga, D.

Powiązania:

https://bibliotekanauki.pl/articles/2088221.pdf

Data publikacji:

2019

Wydawca:

Uniwersytet Opolski. Instytut Nauk o Zdrowiu

Tematy:

caesarean section
intenstial microflora
vaginal seeding
breastfeeding
probiotics

Opis:

Intestinal microflora is found at approximately 10⁴ bacteria per ml of intestinal fluid. Although this ecosystem is very diverse with dynamic changes taking place within it, there is a certain stability in the type and number of species, referred to as the core microbiome, found in 95% of the human population. Genetic variation of microorganisms is relatively small, and their functions are strictly defined and highly conservative. The microbiome exists symbiotically with the host, protecting it against colonization by pathogenic microorganisms, providing essential metabolites, and stimulating the immune system. Colonization begins prenatally and its development is greatly influenced by the course of pregnancy, method of delivery, food supplied to the child during the first moments of life, and post-birth environment. The appropriate intestinal microflora composition is a key determinant of health and homeostasis, and any intestinal dysbiosis can be associated later in life with the development of obesity, diabetes, allergies or cancer. Due to the increasing number of hospitalised pregnancies and deliveries, affecting the intestinal microflora of a newborn, efforts are being made to minimize this process and restore the newborn’s microbiome. The use of the Vaginal seeding procedure raises up great hopes, but also some fears concerning its safety. Some very simple and most natural factors have been recently also appreciated and promoted, such as breastfeeding or direct contact of the baby’s skin with the mother’s skin, which are allies to probiotic bacteria. The purpose of this paper is to emphasize the importance of microbial colonization of the human body and to present the latest and most effective procedures that are designed to correct the existing dysbiosis or to reduce the risk of its occurrence. The literature for the compilation of this study has been obtained from databases such as PubMed, Google Scholar, Web of Science.

Źródło:

Medical Science Pulse; 2019, 13, 3; 68-71
2544-1558
2544-1620

Pojawia się w:

Medical Science Pulse

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 30.

Tytuł:

Morphometry of the teeth of western North American tyrannosaurids and its applicability to quantitative classification

Autorzy:

Samman, T
Powell, G.L.
Currie, P.J.
Hills, L.V.

Powiązania:

https://bibliotekanauki.pl/articles/21645.pdf

Data publikacji:

2005

Wydawca:

Polska Akademia Nauk. Instytut Paleobiologii PAN

Opis:

Gross tooth morphology and serration morphology were examined to determine a quantifiable method for classifying tyrannosaurid tooth crowns from western North America. From the examination of teeth in jaws, tyrannosaurid teeth could be qualitatively assigned to one of five types based on the cross−sectional shape of the base of the tooth and characteristics of the mesial carina. A principal component analysis (PCA) revealed that much of the variance in tooth shape was a result of isometry, but some gross morphological variables exhibited strong positive allometry. Non−size associated factors were also important in determining tooth shape, particularly when data on denticle dimensions were considered in the analysis. While PCA identified important factors in variation, PCA ordination plots did not cluster the teeth into distinct, separate groupings based on taxon or bone of origin. The group classification functions determined by discriminant analysis, though not universally successful for classifying unidentified isolated teeth of all tyrannosaurids, do identify bone of origin of adult Albertosaurus, Daspletosaurus, and Gorgosaurus teeth at a statistically acceptable level.

Źródło:

Acta Palaeontologica Polonica; 2005, 50, 4; 757-776
0567-7920

Pojawia się w:

Acta Palaeontologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 31.

Tytuł:

Modelowanie obwodu łącznika energoelektronicznego w programach symulacji PSpice i TCad
Modelling of power electronic switch circuits in PSpice and TCad programs

Autorzy:

Władziński, W.
Chrzan, P.J.
Mandrek, S.

Powiązania:

https://bibliotekanauki.pl/articles/268443.pdf

Data publikacji:

2003

Wydawca:

Politechnika Gdańska. Wydział Elektrotechniki i Automatyki

Opis:

W referacie zaprezentowano sposób modelowania obwodu łącznika energoelektronicznego w klasycznych programach symulacyjnych, takich jak PSpice oraz TCad. Wykonano analizę matematyczną równań związanych z komutacją układu łącznika energoelektronicznego podczas procesu wyłączania. Wyjaśniono wpływ poszczególnych parametrów obwodowych na jakość procesów komutacyjnych łącznika energoelektronicznego. Ocenę opracowanych modeli łączników przeprowadzono na podstawie symulacji komputerowej oraz zależności matematycznych.
A method of modelling of power electronic switch circuits in PSpice and TCad programs is presented in the paper. Mathematical analysis of equations describing commutation processes in a power electronic switch during switch-off has been performed. The influence of individual circuit parameters on the quality of commutation processes has been explained. The evaluation of the developed models of switches has been done on the basis of simulation results and analytical equations.

Źródło:

Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2003, 19; 157-163
1425-5766
2353-1290

Pojawia się w:

Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 32.

Tytuł:

Multifunctional, Optical Sensor for Analysis of Dynamic Pupillary Light Reflex

Autorzy:

Różanowski, K.
Lewandowski, J.
Murawski, K.

Powiązania:

https://bibliotekanauki.pl/articles/1398782.pdf

Data publikacji:

2015-03

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

42.66.Ct
42.30.Va
07.05.Pj
07.07.Df

Opis:

The aim of the publication is to describe the multifunctional optical sensor for analysis of dynamic pupillary light reflex developed by the authors which could be used as an objective indicator of human fatigue. The authors utilized knowledge gained from past experimental studies to develop a sensor, which along with custom software for detection of parameters of dynamic pupillary reflex provides a quick analysis of the human psychophysiological condition. Furthermore, the obtained parameters may also be utilized for medical purposes. The authors present the results of pilot studies prior to the development process of the sensory solution. The obtained result show that the type of light stimulation of the retina has a significant impact on the dynamic parameters of the pupillary reflex. The results played also an important role in shaping the structural assumptions of the sensor, so that it can serve as an indicator of the human fatigue level. The article includes results of experimental research conducted during the testing process of the sensor using various parameters of frequency light excitations, luminance and chrominance.

Źródło:

Acta Physica Polonica A; 2015, 127, 3; 723-729
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 33.

Tytuł:

Comparative assessment of selected intraoral microorganisms – potential factors for peri-surgical management complications

Autorzy:

Zawadzki, P.J
Starosciak, B.
Perkowski, K.
Baltaza, W.
Padzik, M.
Pionkowski, K.
Chomicz, L.

Powiązania:

https://bibliotekanauki.pl/articles/6223.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Parazytologiczne

Opis:

In this research, a comparative analysis of results of investigations involving different human populations, in terms of a relation between the oral cavity health and the species composition of mouth microbiota is reported. The purpose of this analysis was to identify and assess microorganisms that could cause health complications in patients with neoplasm requiring dental problem-related surgical management. The patients with the oral cancer surgically treated and those without neoplasm were assessed for their oral health: status of teeth, gingiva, periodontium, and occurrence of inflammatory processes. From each patient, microorganisms isolated of periodontium, dental plaque, and dental pocket swabs were identified in wet and stained microscopic preparations; standard microbiology in vitro techniques were also applied to determine the fungal and bacterial strains. The comparative analysis of results of direct microscopic examinations and in vitro cultures assessment indicated significant differences in prevalences of fungi, parasitic oral protozoans and bacteriae in particular patient’s groups. Yeast-like fungi belonging to Candida genus, mostly of C. albicans group, were identified in 93.75% patients with the oral cancer, while in 25% of individuals assessed without neoplasm. E. gingivalis amoebae were only found in 12.5% patients with the serious disease; no trichomonads were detected in all patients analyzed. Among bacteria species, potentially pathogenic Enterobacteriaceae were found in the patients with oral cancer. The pronounced shift in the microbiota species composition in the patients who needed prolonged treatment due to oral cavity cancer, compared to other generally healthy persons has been showed in this analysis.

Źródło:

Annals of Parasitology; 2016, 62, 3
0043-5163

Pojawia się w:

Annals of Parasitology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 34.

Tytuł:

Ocena plonowania odmian Festuca pratensis i Festuca rubra przy roznej czestotliwosci koszenia

Autorzy:

Domanski, P.J.

Powiązania:

https://bibliotekanauki.pl/articles/76084.pdf

Data publikacji:

2004

Wydawca:

Polskie Towarzystwo Łąkarskie

Tematy:

Festuca pratensis
kostrzewa lakowa
Festuca rubra
kostrzewa czerwona
czestotliwosc koszenia
plonowanie
lakarstwo

Źródło:

Łąkarstwo w Polsce; 2004, 07; 87-94
1506-5162

Pojawia się w:

Łąkarstwo w Polsce

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 35.

Tytuł:

CO-induced photoemission structures of the CO/Pt/Ru(0001) interface

Autorzy:

Godowski, P.J.
Onsgaard, J.
Li, Z.

Powiązania:

https://bibliotekanauki.pl/articles/1058526.pdf

Data publikacji:

2016-12

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

79.60.Jv
33.60.+q
82.80.Pv

Opis:

The CO/Pt/Ru(0001) interface has been re-examined, in great detail, by photoelectron spectroscopy of high resolution under UHV conditions. The Ru(0001) substrate has been modified by platinum at coverages less than corresponding to the one, saturated, Pt overlayer, with no Pt/Ru intermixing. The analysis of the extent to which different regions of the photoelectron spectrum allow a detailed characterization of the interface is presented. The CO adsorption displays interaction with two separate phases: the Pt(111) face and the Ru(0001) surface.

Źródło:

Acta Physica Polonica A; 2016, 130, 6; 1389-1394
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 36.

Tytuł:

Determination of Radiation Shielding Properties of Fabrics using Image Processing Method

Autorzy:

Kilinçarslan, Ş.
Üncü, İ.
Akkurt, İ.
Günoğlu, K.
Akarslan, F.
Coşkunsu, S.

Powiązania:

https://bibliotekanauki.pl/articles/1031660.pdf

Data publikacji:

2017-09

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

28.41.Te
07.05.Pj

Opis:

It is extremely important to protect the human body from radioactive rays. Protective clothing can be used to absorb radiation because it is preferable to avoid the natural and artificial radiation exposure in our daily lives. There are many different types of fabric, used for clothes. In this study radiation absorbing properties of fabrics, which are widely used in the daily life, such as alpaca-type fabric, cotton fabric, cotton polyester blend fabric, woven dyed fabric and knitted fabric were examined using the image processing method.

Źródło:

Acta Physica Polonica A; 2017, 132, 3; 1171-1172
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 37.

Tytuł:

CRI and GAI comparison in LED light sources using image processing

Autorzy:

Üncü, İ.
Coşkunsu, S.
Sönmez, C.
Biçakçi, O.

Powiązania:

https://bibliotekanauki.pl/articles/1070203.pdf

Data publikacji:

2016-07

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

07.05.Pj
42.30.-d
42.66.Ne

Opis:

In this study, color rendering index and gamut area index related to the light quality of a light source are compared. Color rendering index is a measure that demonstrates how much a light source reveals colors in nature. In color rendering index measurements, average of reference colors is taken to obtain an overall measurement value. As to gamut area index measurement, the result is obtained through the field measurement formed by the results of reference colors in the color space.

Źródło:

Acta Physica Polonica A; 2016, 130, 1; 379-381
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 38.

Tytuł:

A Study on Performance Effects of Standard and Stabilized He-Ne Lasers in an Interferometric Measurement System

Autorzy:

Böcekçi, V.

Powiązania:

https://bibliotekanauki.pl/articles/1187297.pdf

Data publikacji:

2016-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

07.60.Ly
81.05.Bx
07.05.Pj

Opis:

Stabilized He-Ne lasers are commonly utilized in interferometric systems, and provide easy and accurate results. The main reason for their extensive use is their output beam's strength and stability. However, these are relatively high in cost. In interferometric measurement systems, standard He-Ne lasers can also be used. This type of lasers has a lower cost, but their output beam strength can fluctuate in time. And this in turn adversely affects the measurement performance. In this study, a standard He-Ne and a stabilized He-Ne lasers were used in the same measurement system. The measurement errors caused by the fluctuation of the output beam of the standard He-Ne laser are minimized by using a video processing technique. When the obtained results were compared with the ideal values, the relative error for the system with the stabilized He-Ne laser was recorded as 0.2%, while for the system with the standard He-Ne laser a relative error rate of 0.3% was achieved. When the results are analyzed, it is evident that in measurement systems with a standard He-Ne laser, the system performance can be boosted with a video processing technique, and that its results can achieve values closer to the performance of stabilized He-Ne lasers.

Źródło:

Acta Physica Polonica A; 2016, 129, 4; 810-812
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 39.

Tytuł:

Interferometry and Dissipative Optics with Atoms

Autorzy:

Szriftgiser, P.
Guéry-Odelin, D.
Desbiolles, P.
Dalibard, J.
Arndt, M.
Steane, A.

Powiązania:

https://bibliotekanauki.pl/articles/1968538.pdf

Data publikacji:

1998-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

03.75.Dg
32.80.Pj
42.50.Vk

Opis:

We have designed a gravitational cavity for ultra-cold atoms using an atomic mirror made from an evanescent laser wave. By a temporal variation of the evanescent wave intensity, we have realized various atom optics components such as temporal slits and phase modulators. We have also designed an atom interferometer using this cavity which proves that the coherence of the de Broglie waves can be preserved during the bounce of the atoms on the mirror. Finally we show that an efficient cooling of the atoms inside the cavity can be achieved using a Sisyphus process during the bounce.

Źródło:

Acta Physica Polonica A; 1998, 93, 1; 197-209
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 40.

Tytuł:

Spatial Resolution Test of a Beam Profile Monitoring System for the Double Electrostatic Ion Storage Ring

Autorzy:

Das, S.
Källberg, A.

Powiązania:

https://bibliotekanauki.pl/articles/1195610.pdf

Data publikacji:

2014-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

07.05.Pj
07.77.Ka
07.05.Fb

Opis:

A beam profile monitoring system based on the imaging of low energy electrons created when the ion beam impinges on a metal plate was built to monitor the beam profile and to cover the wide range of beam intensities and energies for the DESIREE (Double ElectroStatic Ion Ring ExpEriment) beam line diagnostics. The spatial resolution of the system was tested with different beams of various energies and was found to be around 2 mm. A significant steering effect on the ion beam before hitting the metallic foil was observed at low energies.

Źródło:

Acta Physica Polonica A; 2014, 125, 1; 13-17
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 41.

Tytuł:

Hidden Object Detection System Based on Fusion of THz and VIS Images

Autorzy:

Kowalski, M.
Palka, N.
Piszczek, M.
Szustakowski, M.

Powiązania:

https://bibliotekanauki.pl/articles/1399381.pdf

Data publikacji:

2013-09

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

07.05.Pj
42.30.Tz
02.60.-x

Opis:

Terahertz imaging makes it possible to acquire images of objects concealed underneath clothing by measuring the radiometric temperatures of different objects on a human subject. Finding objects hidden under clothes is one of key issues of public places security. A possible solution of this problem is a multispectral, terahertz-based screening system with implemented image fusion algorithm. The result of the fusion is a new image which gives more information and is more suitable for human perception. An imaging system is usually composed of various subsystems. Many of the imaging systems use imaging devices working in various spectral ranges. The aim of our studies is to detect and visualize objects hidden under clothing. Detection of potentially dangerous objects is important, but without proper visualization, can be difficult to utilize. Our goal is to build a system harmless to humans for screening and detection of hidden objects using a THz and VIS cameras. The presented system draws attention not only on the properties offered by a single camera but also on the potential of synergetic effects of the system by using the fusion of data registered by different sensor units. In this paper we present the multispectral passive imaging system for hidden threats visualization based on THz and VIS cameras.

Źródło:

Acta Physica Polonica A; 2013, 124, 3; 490-493
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 42.

Tytuł:

Nanocrystalline α-Fe Layer Examined by Mössbauer Spectrometry

Autorzy:

David, B.
Schneeweiss, O.
Pizúrová, N.
Rek, A.
Kudrle, V.
Jašek, O.

Powiązania:

https://bibliotekanauki.pl/articles/1381817.pdf

Data publikacji:

2014-07

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

52.75.Hn
73.63.Bd
76.80.Pj

Opis:

A few micrometers thick nanocrystalline α-Fe layer with the mean crystallite size $d_{XRD}$=14 nm was deposited in low-pressure microwave plasma, using $Fe(CO)_{5}$ vapour. Its nanocrystalline character was proved on its surface under SEM (surface was formed of deposited nanoparticles) and in its volume using TEM (deposited nanoparticles were stacked up, creating columns). No significant iron oxide phases were observed in the transmission $\text{}^{57}Fe$ Mössbauer spectrum measured at 5 K nor in the surface-sensitive $\text{}^{57}Fe$ conversion electron Mössbauer spectrum measured at 293 K.

Źródło:

Acta Physica Polonica A; 2014, 126, 1; 94-95
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 43.

Tytuł:

The Effect of Sodium Chloride on the Process of Drying of Porous Media

Autorzy:

Fijał-Kirejczyk, I.
Milczarek, J.
Jurkowski, Z.
Żołądek, J.

Powiązania:

https://bibliotekanauki.pl/articles/1399036.pdf

Data publikacji:

2013-12

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.Tv
07.05.Pj
81.05.Rm

Opis:

The high temperature drying process of corundum cylinders partially saturated with aqueous solutions of sodium chloride was investigated with neutron imaging technique accompanied with mass and temperature measurements. The statistical analysis of neutron images was applied in order to quantify the time evolution of the process. The substantial slowing down of drying with increasing salt concentration was found. This effect was attributed to increase of viscosity of the solution with increasing salt content as well as to the formation of an outer layer of NaCl on the sample surface.

Źródło:

Acta Physica Polonica A; 2013, 124, 6; 1025-1028
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 44.

Tytuł:

Laser Cooling: Beyond One Field and One Dimension

Autorzy:

Bigelow, N. P.
Cas, T.
Pu, H.
Korn, J.
Shaffer, J.
Hemmer, P. R.
Katz, D. P.
Shahriar, M. S.

Powiązania:

https://bibliotekanauki.pl/articles/1931374.pdf

Data publikacji:

1994-07

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

32.80.Pj

Opis:

We describe recent experimental and theoretical results which show that the light pressure force for an atom with more than two levels, in a field with more than one frequency or which is studied in more than one dimension can display striking new features. The importance of these results lies in the fact that they cannot be explained in terms of a two-level, a monochromatic or a one-dimensional theory.

Źródło:

Acta Physica Polonica A; 1994, 86, 1; 29-40
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 45.

Tytuł:

The Characterization of Defects in Multi-Layered Composite Materials by Thermal Tomography Methods

Autorzy:

Swiderski, W.

Powiązania:

https://bibliotekanauki.pl/articles/1808057.pdf

Data publikacji:

2009-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

07.57.-c
07.05.Pj
42.30.-d
42.30.Wb
42.72.Ai

Opis:

The idea of thermal tomography is slicing a work piece for some in-depth layers which exhibit the distribution of thermal properties in materials by the analogy with X-ray tomography. Thermal tomography is based on the analysis of the surface temperature evolution which follows thermal stimulation of test samples. In this paper, some experimental results of applying the dynamic thermal tomography algorithm to a carbon fibre reinforced plastic sample are presented. The efficiency of few data processing methods is discussed.

Źródło:

Acta Physica Polonica A; 2009, 115, 4; 800-804
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 46.

Tytuł:

Faunistic diversity of Maltese pocket sandy and shingle beaches: are these of conservation value?

Autorzy:

Gauci, M.J.
Deidun, A.
Schembri, P.J.

Powiązania:

https://bibliotekanauki.pl/articles/47728.pdf

Data publikacji:

2005

Wydawca:

Polska Akademia Nauk. Instytut Oceanologii PAN

Tematy:

fauna
littoral fauna
shingle beach
sandy beach
coastal conservation
Malta

Opis:

The littoral fauna of Maltese sandy and shingle beaches is generally regarded as impoverished and consequently of little conservation interest. The fauna of three sandy and three shingle beaches was systematically sampled by coring, standardised searching and pitfall traps. Diversity and population density were highest at the surface for sandy beaches, but were highest below the surface for shingle. The two beach types had distinct suites of species and individual beaches were faunistically distinct. Maltese sandy and shingle beaches are of conservation importance for their habitat-restricted species, some of which have limited local and regional distributions, and are internationally protected.

Źródło:

Oceanologia; 2005, 47, 2
0078-3234

Pojawia się w:

Oceanologia

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 47.

Tytuł:

Development and validation of RP-HPLC method for the determination of doxycycline hyclate in spiked human urine and pharmaceuticals

Autorzy:

Ramesh, P.J.
Basavaiah, K.
Tharpa, K.
Vinay, K.B.
Revanasiddappa, H.D.

Powiązania:

https://bibliotekanauki.pl/articles/3655.pdf

Data publikacji:

2010

Wydawca:

Instytut Medycyny Wsi

Źródło:

Journal of Pre-Clinical and Clinical Research; 2010, 04, 2
1898-2395

Pojawia się w:

Journal of Pre-Clinical and Clinical Research

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 48.

Tytuł:

New data on anatomy of the Late Cretaceous multituberculate mammal Catopsbaatar

Autorzy:

Kielan-Jaworowska, Z
Hurum, J.H.
Currie, P.J.
Barsbold, R.

Powiązania:

https://bibliotekanauki.pl/articles/19969.pdf

Data publikacji:

2002

Wydawca:

Polska Akademia Nauk. Instytut Paleobiologii PAN

Tematy:

mammal
Cretaceous
Late Cretaceous
anatomy
Catopsbaatar catopsaloides
Catopsbaatar
multituberculate mammal

Opis:

The Gobi Desert is famous for providing one of the worlds best preserved Cretaceous terrestrial faunas, including dinosaurs and mammals. Beginning with the Central Asiatic Expeditions in the 1920s, through the Polish−Mongolian Expeditions in the 1960s–1970s, Soviet−Mongolian Expeditions in 1970s, and finally the Mongolian Academy−American Museum Expeditions in the 1990s–2000s, the number of complete skulls (see Kielan−Jaworowska et al. 2000 for review) of Cretaceous mammals often associated with postcranial skeletons, found in Mongolia increased to several hundred. In addition to these professional expeditions, there have been other types of trips to Mongolia, also aimed at collecting fossils. The Nomadic Expeditions Company in USA organizes one of these, and has made trips to Mongolia since 1996. During the 1999 Nomadic Expedition, a skull associated with parts of the postcranial skeleton of the multituberculate mammal Catopsbaatar catopsaloides was found. The specimen is more complete than others previously known of this species and brings new data on multituberculate anatomy and ontogenetic variation. In this note we discuss the new data on the structure of C. catopsaloides; the details of its anatomy will be described in subsequent papers by the two first authors.

Źródło:

Acta Palaeontologica Polonica; 2002, 47, 3
0567-7920

Pojawia się w:

Acta Palaeontologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 49.

Tytuł:

Studying Efficiency of NDE Techniques Applied to Composite Materials in Aerospace Applications

Autorzy:

Dragan, K.
Swiderski, W.

Powiązania:

https://bibliotekanauki.pl/articles/1538180.pdf

Data publikacji:

2010-05

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.70.Cv
07.57.-c
62.20.M
07.05.Pj
62.20.mt

Opis:

This work presents the modern approach to the detection of various types of defects in composite structures used in aerospace. In such structures, including glass reinforced plastics and carbon reinforced plastics, different failure modes could occur at a manufacturing stage and during service life. Defects are connected with inadequate technology, poor workmanship, cycling fatigue loads, impact damage and environmental conditions. The main types of defects are delaminations, disbonds, foreign object inclusions and porosity. To detect such defects, several non destructive evaluation techniques can be applied, merely to mention ultrasonic, low frequency acoustics, infrared thermography and shearography. The use of multimode non destructive evaluation techniques enables characterization of defects which cannot be detected by using single non destructive evaluation methods. This paper demonstrates the necessity of using non destructive evaluation methods for the implementation of quality control and maintenance procedures while servicing aerospace composite elements.

Źródło:

Acta Physica Polonica A; 2010, 117, 5; 878-883
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 50.

Tytuł:

NIST Cesium Fountains - Current Status and Future Prospects

Autorzy:

Jefferts, S.
Heavner, T.
Parker, T.
Shirley, J.

Powiązania:

https://bibliotekanauki.pl/articles/1814049.pdf

Data publikacji:

2007-11

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

06.20.Fn
32.30.Bv
32.30.-r
32.10.Fn
32.80.Pj

Opis:

We review the current status of the U.S. Primary Frequency Standard, NIST-F1. NIST-F1 is a laser-cooled cesium fountain based frequency standard with an inaccuracy of less thanδ f/f<5×$10^{-16}$; limited mainly by the radiation field in the room-temperature fountain (blackbody shift). NIST-F1 is one of the best cesium fountains currently contributing to international atomic time, but has reached a point that it is impractical to improve its accuracy substantially. Therefore we are building a new fountain, imaginatively named NIST-F2, with a cryogenic (77 K) Ramsey interrogation zone that lowers the blackbody shift by several orders of magnitude. NIST-F2 is currently undergoing final assembly, and we will discuss our planned (hoped for) performance, which includes frequency inaccuracy ofδ f/f<1×$10^{-16}$.

Źródło:

Acta Physica Polonica A; 2007, 112, 5; 759-767
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 51.

Tytuł:

Method of Measuring the Distance to an Object Based on One Shot Obtained from a Motionless Camera with a Fixed-Focus Lens

Autorzy:

Murawski, K.

Powiązania:

https://bibliotekanauki.pl/articles/1189717.pdf

Data publikacji:

2015-06

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

06.30.Bp
07.05.Pj
07.07.Df

Opis:

The paper presents the method of measuring the distance to the object based on digital image processing. The solution is characterized in that the distance measurement to the object is performed by a motionless camera with established and unchanged parameters during measurement. The camera is equipped with a one non-stereoscopic lens. The measured distance is determined on the basis of one view of an object presented on one image. The image is made at a constant and invariant setting of the optical path such as: focus, aperture and focal length.

Źródło:

Acta Physica Polonica A; 2015, 127, 6; 1591-1595
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 52.

Tytuł:

Analysis of field tension infiltrometer data by parameter estimation

Autorzy:

Simunek, J.
Wang, Dong
Shouse, P.J.
Van Genuchten, M.T.

Powiązania:

https://bibliotekanauki.pl/articles/26040.pdf

Data publikacji:

1998

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

field tension
Wooding's analysis
tension disc infiltrometer
hydraulic property
soil property
parameter estimation

Źródło:

International Agrophysics; 1998, 12, 3
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 53.

Tytuł:

A New Deinonychosaurian Track from the Lower Cretaceous Hekou Group, Gansu Province, China

Autorzy:

Xing, L.
Li, D.
Harris, J.D.
Bell, P.R.
Azuma, Y.
Fujita, M.
Lee, Y.-N.
Currie, P.J.

Powiązania:

https://bibliotekanauki.pl/articles/20547.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Instytut Paleobiologii PAN

Opis:

Herein we describe deinonychosaurian (Dinosauria: Theropoda) tracks in the Lower Cretaceous Hekou Group at sites I and II of Liujiaxia Dinosaur National Geopark, Gansu Province, China. The site preserves 71 didactyl tracks, the largest concentration of deinonychosaurian tracks in Asia. The tracks pertain to a new dromaeopodid ichnospecies: Dromaeosauripus yongjingensis ichnosp. nov., which is diagnosed by: a digital pad formula of x−1−3−4−x and a mean divarication angle between digits III and IV of 19°, and having the proximal portion of digit II contacting the anterior margin of a large, rounded metatarsophalangeal pad. Six Dromaeosauripustrackways from site II comprise at least two, and possibly three, turning trackways in which the track maker(s) turned without slowing down. None of the Dromaeosauripus trackways are parallel or closely spaced, suggesting that they were made by solitary track makers. Estimates of dromaeopodid track−maker sizes are between 61–300 cm, well within the size range established by body fossils of both dromaeosaurids and troodontids.

Źródło:

Acta Palaeontologica Polonica; 2013, 58, 4
0567-7920

Pojawia się w:

Acta Palaeontologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 54.

Tytuł:

Evaluation of selected oral cavity microbiota – risk factors of management complications in patients with masticatory system disorders

Autorzy:

Zawadzki, P.J.
Perkowski, K.
Starosciak, B.
Dybicz, M.
Baltaza, W.
Pionkowski, K.
Chomicz, L.

Powiązania:

https://bibliotekanauki.pl/articles/6035.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Parazytologiczne

Opis:

The retrospective analysis of data on oral cavity clinical status in relation to microbiota species composition is presented. The research regards patients of different age, with and without congenital malformation, pretreatment assessed for occurrence of pathological changes in the masticatory system. Samples of the swabs collected from each patient (from dental plaque, periodontium and dental pockets) were used for identification of oral protozoans in wet slides and stained preparations; additionally, transmission electron microscope examination was performed. The material was used for in vitro cultures to identify bacteria strains. Clinically, intensity of tissue deteriorations was higher in patients with a congenital disease. Alive Trichomonas tenax and Entamoeba gingivalis, species with confirmed pathogenic impact on oral cavity and neighboring structures, were detected with higher prevalence in older patients. Enterococci, Staphylococcus aureus, various Enterobacteriaceae were more frequently detected in patients with somatic and mental retardations; in mouths of those patients, Klebsiella pneumonia and Pseudomonas aeruginosa opportunistic strains occurred. Masticatory system abnormalities favor colonization of oral cavity by exogenous species and dissemination of infections, especially dangerous for patients with congenital diseases. Oral microbiota assessment and preventive measures may be helpful to avoid subsequent peri-surgery complications.

Źródło:

Annals of Parasitology; 2016, 62, 1
0043-5163

Pojawia się w:

Annals of Parasitology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 55.

Tytuł:

New specimens of the crested theropod dinosaur Elmisaurus rarus from Mongolia

Autorzy:

Currie, P.J.
Funston, G.F.
Osmolska, H.

Powiązania:

https://bibliotekanauki.pl/articles/23110.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Instytut Paleobiologii PAN

Tematy:

new species
theropod dinosaur
dinosaur
Elmisaurus rarus
Dinosauria
Oviraptorosauria
Caenagnathidae
Elmisaurinae
Cretaceous
Mongolia

Opis:

New specimens of Elmisaurus rarus from the Upper Cretaceous of Mongolia (Nemegt Formation) preserve bones not previously found in “elmisaurids” that help elucidate their relationships to Leptorhynchos elegans and other oviraptorosaurs. Elmisaurus rarus and the North American Leptorhynchos elegans are known from numerous but incomplete specimens that are closely related to, but nevertheless clearly distinguished from, Chirostenotes pergracilis and Epichirostenotes curriei. These specimens include the first known cranial bone attributed to Elmisaurus, the frontal, which clearly shows this animal had a cranial crest (most of which would have been formed by the nasal bones). The first vertebrae, scapula, femora, and tibiae from Elmisaurus are also described. The Elmisaurinae can be distinguished from the Caenagnathinae by the coossification of the tarsometatarsus and smaller size at maturity. Examination of oviraptorosaur hindlimbs reveals four distinct morphotypes, possibly attributable to paleoecological differences.

Źródło:

Acta Palaeontologica Polonica; 2016, 61, 1
0567-7920

Pojawia się w:

Acta Palaeontologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 56.

Tytuł:

Utilization of Digital Processing of the Optical Scanning Field View for Tip-Sample Distance Estimation during the Approach Procedure

Autorzy:

Sikora, A.
Bednarz, Ł.

Powiązania:

https://bibliotekanauki.pl/articles/1807509.pdf

Data publikacji:

2009-12

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

06.60.Sx
07.05.Pj
07.79.-v

Opis:

In this article we present the method of determining the tip-sample distance using advanced data processing of scanning field's optical picture. This feature can reduce both: the approach process time and the risk of damaging the tip or the sample. Experimental results will be also presented.

Źródło:

Acta Physica Polonica A; 2009, 116, S; S-99-S-101
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 57.

Tytuł:

Study of Probes and Substrates for Low Temperature Atomic Force Microscopy and Biological Applications

Autorzy:

Radenovic, A.
Bystrenova, E.
Libioulle, L.
Dietler, G.

Powiązania:

https://bibliotekanauki.pl/articles/2036949.pdf

Data publikacji:

2003

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

07.79.Lh
68.37.Hk
82.39.Pj
07.20.Mc

Opis:

The atomic force microscopy in ultrahigh vacuum and at low temperature demonstrated its excellent capability to reach atomic resolution. Nevertheless in the case of biological samples high resolution has been achieved only in very few cases. We demonstrated here the importance of the appropriate choice of probes and substrates in order to image DNA at low temperature with high resolution. We investigated properties of three types of cantilevers and they were studied by scanning electron microscopy as a function of temperature. A large bending of cantilevers, which were coated from both sides, was observed at low temperatures. Therefore uncoated cantilevers are strongly recommended for low temperature applications. Different methods for immobilization of DNA on the substrate are examined at low temperatures. First images of linear DNA on graphite at 82 K under ultrahigh vacuum conditions are presented.

Źródło:

Acta Physica Polonica A; 2003, 104, 3-4; 373-380
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 58.

Tytuł:

Effect of utilization intensity on growth of lawn cultivars of Kentucky bluegrass (Poa pratensis L.)
Wpływ intensywności użytkowania na odrastanie trawnikowych odmian wiechliny łąkowej (Poa pratensis L.)

Autorzy:

Domanski, P.J.
Andrzejewska, J.
Iwicki, R.

Powiązania:

https://bibliotekanauki.pl/articles/46655.pdf

Data publikacji:

2011

Wydawca:

Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB

Opis:

The aim of this study was to estimate the level of annual and daily growth of lawn plant height of Kentucky bluegrass cultivars depending on the intensity of their utilization and to group bluegrass cultivars into slowly and quickly growing. The basis for the study was the results of cultivar tests conducted by COBORU in 1998-2004 at three Experimental Stations of Cultivar Testing – Lisewo (54°06’ N; 18°50’ E), Łopuszna (49°29’ N; 20°08’ E) and Pawłowice (50°28’ N; 18°29’ E). Two systems of utilization were applied: moderately intensive (Relaks) and extensive (Park). At extensive utilization, annual plant growth values of all the tested cultivars were smaller by 20-30 cm, and average daily growth values by 0.14 cm smaller than with their intensive utilization. The slowly growing cultivars were Alicia, America, Baron, Bartender, Broadway, Limousine, NIB398, Orfeo, RAH498, Samoa and Qantum Leap, and quickly growing – Gol, Mardona, Haga, Sobra and Evora. At the utilization system Relaks, daily growth values of slowly growing cultivars were on average by 25% smaller, and at the Park system, by 35% smaller than those of quickly growing cultivars.
Celem badań było określenie poziomu rocznych i dobowych przyrostów wysokości roślin trawnikowych odmian wiechliny łąkowej w zależności od intensywności ich użytkowania oraz pogrupowanie odmian wiechliny na wolno i szybko odrastające. Podstawę opracowania stanowiły wyniki doświadczeń odmianowych prowadzonych przez COBORU w latach 1998-2004 w trzech Stacjach Doświadczalnych Oceny Odmian – Lisewie (54°06’ N; 18°50’ E), Łopusznej (49°29’ N; 20°08’ E) i Pawłowicach (50°28’ N; 18°29’ E). Stosowano dwa sposoby użytkowania: umiarkowanie intensywny (Relaks) i ekstensywny (Park). Przy ekstensywnym użytkowaniu roczne przyrosty roślin wszystkich testowanych odmian były o 20-30 cm, a średnie dobowe przyrosty o 0.14 cm mniejsze niż przy ich użytkowaniu intensywnym. Odmianami wolno odrastającymi były Alicia, America, Baron, Bartender, Broadway, Limousine, NIB398, Orfeo, RAH498, Samoa i Qantum Leap, a szybko odrastającymi – Gol, Mardona, Haga, Sobra i Evora. Przy sposobie użytkowania Relaks dobowe przyrosty odmian wolno odrastających były średnio o 25% mniejsze, a przy sposobie Park – o 35% mniejsze niż odmian szybko odrastających.

Źródło:

Acta Scientiarum Polonorum. Agricultura; 2011, 10, 3
1644-0625

Pojawia się w:

Acta Scientiarum Polonorum. Agricultura

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 59.

Tytuł:

Positive and negative effects of trauma in patients after myocardial infarction: the role of type D personality

Autorzy:

Ogińska-Bulik, N.
Gurowiec, P.J.

Powiązania:

https://bibliotekanauki.pl/articles/2087937.pdf

Data publikacji:

2020

Wydawca:

Uniwersytet Opolski. Instytut Nauk o Zdrowiu

Tematy:

trauma
posttraumatic stress
posttraumatic growth
type D personality
myocardial infarction

Opis:

Background: Experiencing a myocardial infarction threatens the health and life of the patient; therefore, it can be perceived as a traumatic event. Indeed, myocardial infarction may result in negative consequences, including symptoms of posttraumatic stress disorder (PTSD). However, it is also possible to experience positive effects from traumatic events, which is expressed as posttraumatic growth. Personality characteristics, including type D (i.e., distressed) personality, are among several factors that have been shown determine the occurrence of negative and positive consequences after exposure to trauma. Aim of the study: The aim of the present study was to establish the role of distressed personality in the occurrence of negative and positive effects of trauma resulting from myocardial infarction. Material and methods: The study included a total of 80 patients after myocardial infarction. Sixty-three patients aged 43–85 years (M=67, SD=10.76) were included in the final analysis. The majority of respondents were men (61.9%). Patients completed a survey with three standardized measurement tools: the PTSD Checklist for DSM-5 (PCL-5), the Posttraumatic Growth Inventory (PTGI), and the Type D Scale (DS-14). Results: Negative affectivity was positively associated with PTSD symptoms, and this association was strongest for negative changes in cognition or mood. Social inhibition was not associated with PTSD symptoms, except for increased arousal and reactivity. Both dimensions of type D personality were positively related to one factor of posttraumatic growth: changes in the spiritual sphere. Conclusions: Reducing the severity of negative affectivity may decrease PTSD symptoms and thus contribute to improved psychosocial functioning among patients who have experienced myocardial infarction.

Źródło:

Medical Science Pulse; 2020, 14, 2; 49-54
2544-1558
2544-1620

Pojawia się w:

Medical Science Pulse

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 60.

Tytuł:

Polyarmonic model of synchronous generator for analysis of autonomous power generation systems

Autorzy:

Kutt, F.
Michna, M.
Ronkowski, M.
Chrzan, P.J.

Powiązania:

https://bibliotekanauki.pl/articles/1372704.pdf

Data publikacji:

2011

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel

Tematy:

generator synchroniczny
maszyna elektryczna
model poliharmoniczny
synchronous generator
electric machine
polyharmonic model

Opis:

This paper presents the polyharmonic modelling of synchronous generator (SG) in machine variables. The simple geometry and windings physical layout has been used for inductance calculations of a salient-pole SG. The main advantage of this model is the ease of describing an autonomous power generation system (APGS) in terms of its topology and thus providing effective analysis at the static and dynamic states, both for normal and fault operations. Particularly, the model can be used to obtain SG voltage and currents for their more extensive harmonic analysis. Comparison of the simulation and measurement results has shown their good agreement, i.e., validating the elaborated polyharmonic model of SG.

Źródło:

Maszyny Elektryczne: zeszyty problemowe; 2011, 4, 92; 109-114
0239-3646
2084-5618

Pojawia się w:

Maszyny Elektryczne: zeszyty problemowe

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 61.

Tytuł:

Magnetocaloric Properties of Fe₇₅Mo₈Cu₁B₁₆ and Fe₈₁Mo₈Cu₁B₁₀ Metallic Glasses

Autorzy:

Hasiak, M.
Miglierini, M.
Kaleta, J.
Bujdoš, M.

Powiązania:

https://bibliotekanauki.pl/articles/1387599.pdf

Data publikacji:

2015-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

75.30.Sg
71.23.Cq
76.80.+y
87.64.Pj

Opis:

Microstructure and thermomagnetic properties for the Fe₇₅Mo₈Cu₁B₁₆ and Fe₈₁Mo₈Cu₁B₁₀ metallic glasses in the as-quenched state and after heat treatment at 643 K and 723 K are studied. The inverse change of the Curie point was observed for Fe₇₅Mo₈Cu₁B₁₆ metallic glass after annealing below the onset of crystallization. It is attributed to structural relaxation of the amorphous phase. The maximum of magnetic entropy change calculated for magnetic field of 1.0 T occurs for the Fe₇₅Mo₈Cu₁B₁₆ alloy annealed at 643 K at temperature close to the Curie point and equals 0.74 J kg¯¹ K¯¹.

Źródło:

Acta Physica Polonica A; 2015, 127, 2; 608-610
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 62.

Tytuł:

Specyfika posługi charytatywnej Kościoła w ujęciu kard. Paula Josefa Cordesa
The Unique Character of Charity Work of the Church according to Cardinal Paul Josef Cordes

Autorzy:

Przygoda, Wiesław

Powiązania:

https://bibliotekanauki.pl/articles/31340364.pdf

Data publikacji:

2010

Wydawca:

Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL

Tematy:

caritas
diakonia
miłość bliźniego
działalność charytatywna
formacja charytatywna
duchowość caritas
kard. P.J. Cordes
Benedykt XVI
diacony
love of fellow humans
charity work
charity formation
caritas spirituality
Cardinal P.J. Cordes
Benedict XVI

Opis:

When announcing the encyclical Deus Caritas Est on December 25, 2005, Pope Benedict XVI added momentum to the discussion of the essence and unique nature of the Church’s charity work. In the discussion of such work, among others, P.J. Cordes’ voice is not to be ignored, not only due to the high position he holds (President of the Papal Council “Cor Unum”) but also his influential publications on charity theology, especially his latest book entitled: Helfer fallen nicht vom Himmel. Caritas und Spiritualität (Eng. Those who give help do not descend from heaven. Caritas and spirituality). In Cardinal’s view, nowadays institutionalized charity work demands an insight into political, economic, sanitary, anthropological and administrative spheres as well as practical skills proved by appropriate certificates. All of this is important and necessary, yet insufficient from the perspective of the charity organizations of the Catholic Church. Only a shift from the legal paradigm to the one of faith will permit a deeper insight into human poverty. Therefore, professionalization of the forms and means should be accompanied by a greater concern for spiritual formation of people who are either professionally or voluntarily involved in the charity mission of the Church.

Źródło:

Roczniki Pastoralno-Katechetyczne; 2010, 2; 25-38
2081-1829

Pojawia się w:

Roczniki Pastoralno-Katechetyczne

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 63.

Tytuł:

B and T lymphocytes in rabbits change according to the sex and throughout the year

Autorzy:

Niedźwiedzka-Rystwej, P.
Tokarz-Deptuła, B.
Abrantes, J.
Esteves, P.J.
Deptuła, W.

Powiązania:

https://bibliotekanauki.pl/articles/2087335.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

rabbit
B and T lymphocytes
reference values

Źródło:

Polish Journal of Veterinary Sciences; 2020, 23, 1; 37-42
1505-1773

Pojawia się w:

Polish Journal of Veterinary Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 64.

Tytuł:

Pseudoloma neurophilia (Microsporidia) - poważne zagrożenie dla hodowli laboratoryjnej danio pręgowanego (Danio rerio, Hamilton 1822)
Pseudoloma neurophilia (Microsporidiosis) - a serious threat to the husbandry of laboratory zebrafish (Danio rerio, Hamilton 1822

Autorzy:

Korzeniowski, P.J.
Wiweger, M.

Powiązania:

https://bibliotekanauki.pl/articles/858944.pdf

Data publikacji:

2016

Wydawca:

Krajowa Izba Lekarsko-Weterynaryjna

Źródło:

Życie Weterynaryjne; 2016, 91, 11
0137-6810

Pojawia się w:

Życie Weterynaryjne

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 65.

Tytuł:

Analysis of general aviation domestic air traffic structure in controlled airspace of poland with refer to SESAR 2020, PJ.06-02 project solution

Autorzy:

Lichoń, D.

Powiązania:

https://bibliotekanauki.pl/articles/243552.pdf

Data publikacji:

2017

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

general aviation
controlled air traffic
SESAR 2020
IFR flights
domestic flight
Polska

Opis:

Civil air traffic in Poland is organized in accordance with international regulations provided by International Civil Aviation Organization (ICAO). Flight operations are performed in controlled airspace (CAS) or uncontrolled airspace. The division contains different approach to flight planning (FP) and group specific types of airspace users (AUs) and aircrafts types. Typically, General Aviation (GA) operations are placed in uncontrolled airspace while airline operations in CAS. This practice results from air operations types and aircrafts flight performance. GA includes sport, school, private transport or business flights and therefore the uncontrolled airspace with its vertical border form the ground to FL 95 contains most of the GA operations. However, there is a part of GA operations performed in CAS according to Instrument Flight Rules (IFR). The aim of the work is to describe the structure of domestic GA operations in IFR flights in CAS of Poland. Using the archival air traffic data from previous five years (2012-2016) the defined subject was analysed. In the first part, the aircraft fleet is presented. It contains the description of aircrafts types with relation to route distances, number of flights, propulsion type and wake turbulence category (WTC). In the second part, the network of defined air traffic was shown. It contains data about departure and destinations airports, the airports loading, month statistic of flights and trend in traffic changes. The traffic data are obtained from Eurocontrol database Demand Data Repository (DDR2) and using the NEST Eurocontrol software. The article arose during author’s traineeship in Eurocontrol within a framework of SESAR 2020 project, PJ.06-02 solution. Presented analyses are useful from the FP point of view since the PJ.06-02 solution refers to “Management of Performance Based Free Routing in lower Airspace” and need to consider the features of every airspace users.

Źródło:

Journal of KONES; 2017, 24, 3; 173-180
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 66.

Tytuł:

New elmisaurine specimens from North America and their relationship to the Mongolian Elmisaurus rarus

Autorzy:

Funston, G.F.
Currie, P.J.
Burns, M.E.

Powiązania:

https://bibliotekanauki.pl/articles/22633.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Instytut Paleobiologii PAN

Tematy:

new species
Elmisaurinae
Dinosauria
Oviraptorosauria
Caenagnathidae
Campanian
Maastrichtian
North America
relationship
Mongolia
Elmisaurus rarus

Opis:

New specimens from Canada confirm the presence of elmisaurines in North America and shed light on the relationship of Leptorhynchos elegans to Mongolian forms. These specimens have hindlimb elements previously unknown from elmisaurines in the Dinosaur Park Formation, including tibiae and pedal phalanges. Metatarsal anatomy is sufficiently different to merit a generic distinction from Elmisaurus rarus, and both can be distinguished from Caenagnathus collinsi and Chirostenotes pergracilis. Differences between these taxa include body size, degree of coossification of the tarsometatarsus, and development of cruciate ridges of the metatarsal III. Histological analysis confirms that these differences are not correlated with ontogenetic age of the specimens. The results support the informal separation of caenagnathids based on metatarsal structure, and allow comments on paleobiological differences between caenagnathids and oviraptorids.

Źródło:

Acta Palaeontologica Polonica; 2016, 61, 1
0567-7920

Pojawia się w:

Acta Palaeontologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 67.

Tytuł:

Structure and Magnetic Properties of Nanocrystalline Fe-Mo Alloys Prepared by Mechanosynthesis

Autorzy:

Karolus, M.
Jartych, E.
Oleszak, D.

Powiązania:

https://bibliotekanauki.pl/articles/2035497.pdf

Data publikacji:

2002-08

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.10.Eq
07.85.Jy
81.07.Bc
81.07.Wx
61.18.Fs
87.64.Pj

Opis:

Nanocrystalline samples of Fe$\text{}_{80}$Mo$\text{}_{20}$ and Fe$\text{}_{50}$Mo$\text{}_{50}$ alloys were prepared by the mechanical milling method. The structure, lattice parameters, and crystallite size were determined by the X-ray diffraction. The magnetic properties of the milled products were determined by the M"ossbauer spectroscopy. It was observed that in the case of the Fe$\text{}_{80}$Mo$\text{}_{20}$ alloy a solid solution of Mo in Fe was formed with the lattice parameters of Fe increasing from 0.28659 nm to 0.29240 nm and the crystallite size decreasing from 250 nm to 20 nm. In the case of the Fe$\text{}_{50}$Mo$\text{}_{50}$ alloy there were no clear changes in values of the lattice parameters of Fe and Mo during the milling process, but the crystallite size decreased from 200 nm to 15 nm. Mössbauer spectra revealed different magnetic phases in the mechanosynthesized Fe-Mo samples. In the case of the Fe$\text{}_{80}$Mo$\text{}_{20}$ alloy, the spectrum for the milled mixture indicated the formation of a solid solution. In contrast, for the Fe$\text{}_{50}$Mo$\text{}_{50}$ the spectrum indicated the disappearance of the ferromagnetic phase.

Źródło:

Acta Physica Polonica A; 2002, 102, 2; 253-258
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 68.

Tytuł:

Some Aspects of Processing and Properties of Composite Material with Si-C Particles

Autorzy:

Nedelcu, D.
Carcea, I.
Tabacaru, L.
Ciofu, C.

Powiązania:

https://bibliotekanauki.pl/articles/1503738.pdf

Data publikacji:

2011-08

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.05.Mh
81.05.Ni
81.05.Pj
81.05.Qk
12.60.Rc

Opis:

The processing of composite materials with metal matrix reinforced with carbon particles, graphite or SiC (Silicon Carbide) is decisively determined by the transfer of the reinforcing particles from the gaseous atmosphere into the molten metal and then by their transfer from liquid into solid. The degree of incorporation, the uniformity of particle distribution and finally all the properties of the composite materials depend on the way in which the transfer conditions from one phase to another have been accomplished. According to the thermodynamic principles, the transfer of the reinforcing particles from one phase to another can happen without external energy input only if the variation of the total free enthalpy is negative. The estimation of the direction of transfer can be done after the determination of critical measurements to the balance of forces that act on the reinforcing element. The particles wetted by the liquid metal and with density of its nearest will be integrated in the melt without external energy input, and those dry and light need additional energy consumption (powder injection, melt stirring etc.). The stalling speed of the SiC particles to the gas/liquid interface is influenced by the density difference and the reinforcing particles size. The critical moving speed of the solidification front is decisively influenced by the difference between $σ_{PS}$ and $σ_{PS}$, inter-phase tensions, as well as by the reinforcing particles size, if their density significantly differs from the one of the liquid alloy. Compared with the initially used alloy, the pull strength is doubled for some samples of obtained composite material. The ultrasonic testing disclosed the presence of some very small spots (porosities) which don't have a major influence on the tensile specimens subjected to pulling. From this reason, a very clear display of the bottom echo can be observed, which justifies the uniformity of the casting process. At the level of the matrix, the presence of the carbon to the separation limit between matrix and reinforcement can be observed, which confirms that during the processing Aluminium Carbide $Al_{4}C_{3}$ has been formed. The presence of these carbides considerably improves the wetting process.

Źródło:

Acta Physica Polonica A; 2011, 120, 2; 344-347
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 69.

Tytuł:

Quantum Control of Motional States of Neutral Atoms: Exploiting the External Degrees of Freedom

Autorzy:

Bigelow, N. P.
Chałupczak, W.
Ejnisman, R.
Pu, H.
Rudy, P.
Shaffer, J.

Powiązania:

https://bibliotekanauki.pl/articles/1968501.pdf

Data publikacji:

1998-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

03.75.Fi
32.80.Pj
42.50.Dv

Opis:

As research in quantum optics has advanced, so too has our ability to precisely tailor the quantum state of a system. Indeed, techniques for quantum state preparation have become sufficiently advanced that an entire subfield has appeared which has been given the name "quantum control". Parallel to these advances have been other striking developments in quantum optics, in particular, laser cooling and trapping of neutral atoms. In this paper we describe some of the recent advancements in laser cooling, particularly in our laboratories, and point out that laser cooling and trapping is also realizing an important form of quantum control. In laser cooling, instead of exercising control over the internal quantum state of an atom or molecule or a laser field, we are instead controlling a complementary set of degrees of freedom: those of the external coordinates of the atom.

Źródło:

Acta Physica Polonica A; 1998, 93, 1; 11-29
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 70.

Tytuł:

The access project: agro-climatic change and European soil suitability - a spatially distributed soil, agro-climatic and soil hydrological model

Autorzy:

Loveland, P.J.

Powiązania:

https://bibliotekanauki.pl/articles/24798.pdf

Data publikacji:

1996

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

soil hydrology
soil erosion
soil
land
hydrological model
soil suitability
Europe
climate change

Źródło:

International Agrophysics; 1996, 10, 3
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 71.

Tytuł:

Hands, feet, and behaviour in Pinacosaurus (Dinosauria: Ankylosauridae)

Autorzy:

Currie, P.J.
Badamgarav, D.
Koppelhus, E.B.
Sissons, R.
Vickaryous, M.K.

Powiązania:

https://bibliotekanauki.pl/articles/21347.pdf

Data publikacji:

2011

Wydawca:

Polska Akademia Nauk. Instytut Paleobiologii PAN

Tematy:

hand
foot
animal behaviour
Pinacosaurus
Dinosauria
Ankylosauridae
Cretaceous
Alag Teeg
Mongolia
Pinacosaurus grangeri
dinosaur
Pinacosaurus ninghsiensis

Opis:

Structure of the manus and pes has long been a source of confusion in ankylosaurs, owing to the imperfect preservation or complete lack of these parts of the skeletons in most specimens, and the fact that many species appear to have undergone a reduction in numbers of digits and phalanges. New specimens of Pinacosaurusfrom Alag Teeg in Mongolia confirm that the phalangeal formula of the manus is 2−3−3−3−2. However, there are only three toes in the pes, which has a phalangeal formula of X−3−3/4−3/4−X. Importantly, the number of phalanges in the third and fourth pedal digits can vary between either three or four per digit, even within the same specimen. The Alag Teeg site has yielded as many as a hundred skeletons of the ankylosaur Pinacosaurus, most of which were immature when they died. Each skeleton is preserved in an upright standing position, with the bones of the lower limbs often in articulation. The remainder of the skeleton, including the upper parts of the limbs, is generally disarticulated and somewhat scattered. Based on the presence of large numbers of juvenile Pinacosaurus specimens at Alag Teeg, as well as other Djadokhta−age sites (Ukhaa Tolgod in Mongolia, Bayan Mandahu in China), it seems juvenile Pinacosaurus were probably gregarious.

Źródło:

Acta Palaeontologica Polonica; 2011, 56, 3
0567-7920

Pojawia się w:

Acta Palaeontologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 72.

Tytuł:

Observation of Pr$\text{}^{+}$ Ions in Paul Trap

Autorzy:

Dembczyński, J.
Stefańska, D.
Szawioła, G.
Furmann, B.
Stachowska, E.
Jarosz, A.
Arcimowicz, B.
Buczek, A.
Koczorowski, W.
Krzykowski, A.
Kajoch, A.
Elantkowska, M.
Ruczkowski, J.
Kowalkiewicz, W.

Powiązania:

https://bibliotekanauki.pl/articles/1967853.pdf

Data publikacji:

1997-09

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

32.80.Pj

Opis:

The first observation of Pr$\text{}^{+}$ ions stored in a Paul trap is reported. Initially the ions were observed by the electronic detection method, and further the laser induced fluorescence, following resonance absorption at a certain optical transition in Pr$\text{}^{+}$ ion, which is excited from the ground state, was recorded. Moreover, fluorescence signal following the excitation from a low-lying metastable state could be detected. The Paul trap system and some other parts of the experimental setup were constructed within the frame of this work and thus are briefly described in the present contribution.

Źródło:

Acta Physica Polonica A; 1997, 92, 3; 517-526
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 73.

Tytuł:

Inflammation- and axotomy-induced changes in cocaine- and amphetamine-regulated transcript peptide-like immunoreactive (CART-LI) nervous structures in the porcine descending colon

Autorzy:

Burlinski, P.J.

Powiązania:

https://bibliotekanauki.pl/articles/32044.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

inflammation
axotomy
cocaine
amphetamine
peptide
enteric nervous system
nerve structure
pig
colon

Opis:

This study reports on changes in CART-like immunoreactive (CART-LI) nerve structures in the porcine descending colon during chemically driven inflammation and after axotomy. The distribution pattern of CART-LI nerve structures was studied using doublelabeling immunofluorescence technique in the circular muscle layer, myenteric (MP), outer submucous (OSP) and inner submucous plexuses (ISP) and also in the mucosal layer of the porcine descending colon in physiological conditions as well as under pathological factors. In the control animals, CART-LI perikarya have been shown to constitute 5.11% ± 0.64, 4.03% ± 1.17 and 0.05% ± 0.04 in MP, OSP and ISP, respectively. Changes in CART-immunoreactivity depended on the pathological factor and the part of the enteric nervous system (ENS) studied. Numbers of CART-LI perikarya amounted to 2.77% ± 0.64, 2.60% ± 0.36 and 0.26% ± 0.19 during chemically-induced colitis and 3.04% ± 0.88, 2.46% ± 0.8 and 0.43% ± 0.09 after axotomy in MP, OSP and ISP, respectively. Both studied pathological processes also caused an increase in the number of CART-LI nerve fibers in the circular muscle as well as in the mucosal layer.

Źródło:

Polish Journal of Veterinary Sciences; 2012, 15, 3
1505-1773

Pojawia się w:

Polish Journal of Veterinary Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 74.

Tytuł:

Selected risk factors for ischemic heart disease and the success of treatment in patients with STEMI myocardial infarction treated with percutaneous coronary intervention

Autorzy:

Jędrzejczyk-Cwanek, M.
Gurowiec, P.J.
Ozga, D.

Powiązania:

https://bibliotekanauki.pl/articles/2087710.pdf

Data publikacji:

2020

Wydawca:

Uniwersytet Opolski. Instytut Nauk o Zdrowiu

Tematy:

myocardial infarction
risk factors
ischemic heart disease

Opis:

Background: Coronary heart disease is one of the most common causes of hospitalization and premature deaths in Europe. ST-segment elevation myocardial infarction (STEMI) has been a clinical problem for many years, particularly in the aspect of choosing the optimal treatment method. The success of treatment is determined by many factors, including risk factors for ischemic heart disease, time between onset of symptoms and initiation of treatment, number and degree of coronary stenosis, and many more. Aim of the study: The aim of the study was to identify risk factors for ischemic heart disease affecting the success of STEMI patients treated with percutaneous coronary intervention (PCI). Material and methods: A retrospective analysis was carried out on data from medical records of patients treated in the Department of Acute Coronary Syndromes of St. Hedvig Provincial Hospital No. 2 in Rzeszow between 2009 and 2014. The research tool used in this paper was the author’s questionnaire. A total of 508 patients with STEMI myocardial infarction treated in the Department of Acute Coronary Syndromes (ACS) between 2009 and 2013 were included in the analysis. The inclusion criteria were the complete and clear files of patient treatment in the ACS department between 2009 and 2013 due to acute coronary syndrome treated invasively by the PCI method. Results: Majority of the study group, 334 subjects, (65.7%) had hypertension. The most common risk factors for ischemic heart disease were found to be dyslipidemia in 176 subjects (34.6%) and smoking in 163 subjects (32.1%). This paper presents the results of the analysis of the success of treatment in relation to risk factors for ischemic heart disease. There was a statistically significant relationship between hypertension and successful treatment (p=0.0425). More cases in which treatment was unsuccessful were observed in the group of patients who had no previous treatment for lipid disorders (20.2% vs. 4.0%) (p = 0.0000). Significantly more cases of treatment failure were found among people who denied smoking (17.4% vs. 8.6%; p = 0.0087). Conclusions: Among the analyzed behavioral and somatic risk factors for failure in patients subjected to treatment were untreated hypertension, hyperlipidemia and a negative history of cigarette smoking.

Źródło:

Medical Science Pulse; 2020, 14, 3; 49-54
2544-1558
2544-1620

Pojawia się w:

Medical Science Pulse

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 75.

Tytuł:

Influence of Rare Earth Ions on the Optical Properties of Tellurite Glass

Autorzy:

Burtan, B.
Reben, M.
Cisowski, J.
Wasylak, J.
Nosidlak, N.
Jaglarz, J.
Jarząbek, B.

Powiązania:

https://bibliotekanauki.pl/articles/1493034.pdf

Data publikacji:

2011-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

07.60.Fs
81.05.Pj
42.70.Ce
78.66.Jg

Opis:

The goal of this work was to investigate the influence of rare-earth ions such as $Nd^{3+}$ and $Er^{3+}$ on the optical properties of tellurite glass of the $TeO_2-WO_3-PbO-La_2O_3$ system. The optical studies of the glasses comprised spectrophotometry (reflectance and transmittance) and spectroscopic ellipsometry. The spectrophotometric measurements yield a number of narrow absorption bands which correspond to characteristic transitions between the ground- and consecutive excited states of rare-earth ions. From ellipsometric studies, in turn, the dispersion of the refraction coefficient has been obtained which appears to be practically the same for the tellurite glass matrix and the matrix doped with $Nd^{3+}$ and $Er^{3+}$ ions.

Źródło:

Acta Physica Polonica A; 2011, 120, 4; 579-581
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 76.

Tytuł:

Theropod teeth from the upper Maastrichtian Hell Creek Formation “Sue” Quarry: New morphotypes and faunal comparisons

Autorzy:

Gates, T.A.
Zanno, L.E.
Makovicky, P.J.

Powiązania:

https://bibliotekanauki.pl/articles/945614.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Instytut Paleobiologii PAN

Tematy:

paleontology
theropod
tooth
Upper Maastrichtian
Maastrichtian
Hell Creek Formation
morphotype
Dinosauria
morphometry
paleoecology
Cretaceous
North America

Opis:

Isolated teeth from vertebrate microfossil localities often provide unique information on the biodiversity of ancient ecosystems that might otherwise remain unrecognized. Microfossil sampling is a particularly valuable tool for documenting taxa that are poorly represented in macrofossil surveys due to small body size, fragile skeletal structure, or relatively low ecosystem abundance. Because biodiversity patterns in the late Maastrichtian of North American are the primary data for a broad array of studies regarding non-avian dinosaur extinction in the terminal Cretaceous, intensive sampling on multiple scales is critical to understanding the nature of this event. We address theropod biodiversity in the Maastrichtian by examining teeth collected from the Hell Creek Formation locality that yielded FMNH PR 2081 (the Tyrannosaurus rex specimen “Sue”). Eight morphotypes (three previously undocumented) are identified in the sample, representing Tyrannosauridae, Dromaeosauridae, Troodontidae, and Avialae. Noticeably absent are teeth attributed to the morphotypes Richardoestesia and Paronychodon. Morphometric comparison to dromaeosaurid teeth from multiple Hell Creek and Lance formations microsites reveals two unique dromaeosaurid morphotypes bearing finer distal denticles than present on teeth of similar size, and also differences in crown shape in at least one of these. These findings suggest more dromaeosaurid taxa, and a higher Maastrichtian biodiversity, than previously appreciated.

Źródło:

Acta Palaeontologica Polonica; 2015, 60, 1; 131-139
0567-7920

Pojawia się w:

Acta Palaeontologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 77.

Tytuł:

Magnetocaloric Effect in Amorphous and Partially Crystallized Fe-Zr-Nb-Cu-B Alloy

Autorzy:

Gondro, J.
Błoch, K.
Nabiałek, M.
Wallters, S.

Powiązania:

https://bibliotekanauki.pl/articles/1387568.pdf

Data publikacji:

2015-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

75.30.Sg
75.47.Np
75.50.Bb
75.50.Kj
75.90.+w
87.64.Pj

Opis:

This paper presents the results of an investigation into the: microstructure, magnetic properties and influence of annealing temperature on the magnetocaloric effect of Fe₈₂Zr₇Nb₂Cu₁B₈ alloy in the as-quenched and partially crystalline state. The microstructure was investigated using Mössbauer spectroscopy. The magnetocaloric effect was observed as a change in the magnetic entropy, which was calculated from isothermal magnetization curves. Fully-amorphous Fe₈₂Zr₇Nb₂Cu₁B₈ alloys, in the as-quenched state, exhibit a Curie temperature equal to (340±5) K. The transmission Mössbauer spectrum for the as-quenched Fe₈₂Zr₇Nb₂Cu₁B₈ alloy is typical for weak ferromagnets with the average hyperfine field of 9.86(2) T. For this alloy in the as-quenched state, the changes in maximum magnetic entropy occur near the Curie points and are equal to 0.95 J/(kg K). Also, the maximum magnetic entropy changes decrease after partial crystallization.

Źródło:

Acta Physica Polonica A; 2015, 127, 2; 606-607
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 78.

Tytuł:

O afrykańskim stanie rzeczy. Analiza teorii systemu autorstwa Paulina J. Hountondjiego
On the condition of African societies and atates. An analysis of the system theory proposed by Paulin J. Hountondji

Autorzy:

Trzciński, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/566746.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie. Instytut Nauk Politycznych

Tematy:

African societies
African states
P.J. Hountondji

Opis:

This article treats on the system theory proposed by a Beninese philosopher Paulin J. Hountondji to explain in part a bad condition of African societies and states. According to Hountondji a socio- political state of affairs in a typical African state is characterized by a serious malfunction of state institutions and highly imperfect organization of day-to-day life of Africans. Hountondji criticizes numerous shortcomings of life in African states, including institutional inertia, senseless activities, waste of time, energy, and health of Africans. The Beninese philosopher is looking for some hidden, system basis for the mentioned characteristics. The aim of this article is to describe Hountondji's views, underline their value, but also analyze them in a critical way.

Źródło:

Forum Politologiczne; 2011, 12 - Problemy bogactwa i biedy we współczesnej Afryce; 393-413
1734-1698

Pojawia się w:

Forum Politologiczne

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 79.

Tytuł:

Effects of Pre-Forming Process and PVC Foam Reinforcement on the Deformation Behavior of Aluminum Tube under Axial Loading

Autorzy:

Ekşi, S.
Kapti, A.
Genel, K.

Powiązania:

https://bibliotekanauki.pl/articles/1031785.pdf

Data publikacji:

2017-09

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.05.-t
81.05.Bx
81.05.Rm
81.40.Lm
81.70.-q
81.05.Pj

Opis:

In this study, the effects of pre-forming and foam reinforcement on the axial compression behavior of circular thin-walled aluminum tubes were experimentally investigated. Compression tests were performed in a computer controlled test machine at the cross-head speed of 1 mm/s. Pre-forming has changed the folding behavior of tube and increased the energy absorbing capacity 1.26 times that of empty tube. The PVC reinforcement has increased the energy absorbing capacity 1.22 times. PVC reinforcement increases the stability of tube wall deformation; hence it positively affects the energy absorption. The energy absorbing capacity of pre-formed and PVC foam reinforced tubes increase approximately 1.4 times that of empty tube. It was however shown that the reinforcement and pre-forming had no significant effect on the maximum load.

Źródło:

Acta Physica Polonica A; 2017, 132, 3; 875-878
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 80.

Tytuł:

Nutrient uptake efficiency of five pistachio (Pistacia vera L.) varieties

Autorzy:

Aznarte-Mellado, C.
Sola-Campoy, P.J.
Robles, F.
Villasenor, J.G.
Rejon, C.R.
de la Herran, R.
Navajas-Perez, R.

Powiązania:

https://bibliotekanauki.pl/articles/1189813.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza

Tematy:

nutrient uptake
pistachio nut
Pistacia vera
nutrient content
edible fruit

Opis:

Pistacia vera L., whose edible fruit is the pistachio, is an economically important crop. It is cultivated worldwide and over 50 different varieties have been described attending to morphological and phenological characteristics. The selection of a suitable cultivar may affect the profitability of the orchards, and thus requires careful consideration for any given region. The type and concentration of nutrients taken up by the plant affect its development and eventually the quality and quantity of the fruits. It is a matter of discussion whether all varieties have the same capacity to absorb nutrients. In order to clarify this aspect, in this study the efficiency of nutrient uptake has been assessed for five pistachio varieties: three males (M38, G1, and Mateur), and two females (Batoury, and Joley), by measuring the concentration of 30 chemical elements in leaves by Inductively Coupled Plasma (ICP) and C/N micro-elemental analyses. Data were subjected to a non-parametric Friedman test, using a series of Wilcoxon Rank Sum test with a Bonferroni correction as post hocs. Our findings demonstrate that all these varieties have an equal uptake capacity for Al, Cr, Cu, K, Li, Mn, Ni, Pb, S, Sr, Ti, Tl, Zn, N, B, Fe, Mg, Na, and V. No differences related to the gender of the plants were detected. Only Mateur exhibited significantly higher levels of Ca and lower levels of C. Stock plants from an experimental plot were used as material. These plants are not used for productive purposes, and flowering and fruiting are partially restricted by removing potential nutrient-demanding structures. These findings support the contention that the presence/absence of such organs has more influence on the nutrient uptake than does the variety itself.

Źródło:

Journal of Elementology; 2016, 21, 1; 141-148
1644-2296

Pojawia się w:

Journal of Elementology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 81.

Tytuł:

An ankylosaurid dinosaur from Mongolia with in situ armour and keratinous scale impressions

Autorzy:

Arbour, V.M.
Lech-Hernes, N.L.
Guldberg, T.E.
Hurum, J.H.
Currie, P.J.

Powiązania:

https://bibliotekanauki.pl/articles/21760.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Instytut Paleobiologii PAN

Tematy:

ankylosaurian dinosaur
dinosaur
Mongolia
Dinosauria
Ankylosauria
Ankylosauridae
Tarchia
Saichania
Late Cretaceous
Cretaceous
paleontology

Opis:

A Mongolian ankylosaurid specimen identified as Tarchia gigantea is an articulated skeleton including dorsal ribs, the sacrum, a nearly complete caudal series, and in situ osteoderms. The tail is the longest complete tail of any known ankylosaurid. Remarkably, the specimen is also the first Mongolian ankylosaurid that preserves impressions of the keratinous scales overlying the bony osteoderms. This specimen provides new information on the shape, texture, and ar− rangement of osteoderms. Large flat, keeled osteoderms are found over the pelvis, and osteoderms along the tail include large keeled osteoderms, elongate osteoderms lacking distinct apices, and medium−sized, oval osteoderms. The specimen differs in some respects from other Tarchia gigantea specimens, including the morphology of the neural spines of the tail club handle and several of the largest osteoderms.

Źródło:

Acta Palaeontologica Polonica; 2013, 58, 1
0567-7920

Pojawia się w:

Acta Palaeontologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 82.

Tytuł:

Off-Axis Electron Holography of Magnetic Nanostructures: Magnetic Behavior of Mn Rich Nanoprecipitates in (Mn,Ga)As System

Autorzy:

Barańska, M.
Dłużewski, P.
Kret, S.
Morawiec, K.
Li, Tian
Sadowski, J.

Powiązania:

https://bibliotekanauki.pl/articles/1033003.pdf

Data publikacji:

2017-05

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.jp
68.37.Lp
07.05.Pj
75.50.Pp

Opis:

The Lorentz off-axis electron holography technique is applied to study the magnetic nature of Mn rich nanoprecipitates in (Mn,Ga)As system. The effectiveness of this technique is demonstrated in detection of the magnetic field even for small nanocrystals having an average size down to 20 nm.

Źródło:

Acta Physica Polonica A; 2017, 131, 5; 1406-1408
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 83.

Tytuł:

Nutrient uptake efficiency of five pistachio (Pistacia vera L.) varieties

Autorzy:

Aznarte-Mellado, C.
Sola-Campoy, P.J.
Robles, F.
Villasenor, J.G.
Rejon, C.R.
de la Herran, R.
Navajas-Perez, R.

Powiązania:

https://bibliotekanauki.pl/articles/14870.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza

Tematy:

nutrient uptake
pistachio nut
Pistacia vera
nutrient content
edible fruit

Opis:

Pistacia vera L., whose edible fruit is the pistachio, is an economically important crop. It is cultivated worldwide and over 50 different varieties have been described attending to morphological and phenological characteristics. The selection of a suitable cultivar may affect the profitability of the orchards, and thus requires careful consideration for any given region. The type and concentration of nutrients taken up by the plant affect its development and eventually the quality and quantity of the fruits. It is a matter of discussion whether all varieties have the same capacity to absorb nutrients. In order to clarify this aspect, in this study the efficiency of nutrient uptake has been assessed for five pistachio varieties: three males (M38, G1, and Mateur), and two females (Batoury, and Joley), by measuring the concentration of 30 chemical elements in leaves by Inductively Coupled Plasma (ICP) and C/N micro-elemental analyses. Data were subjected to a non-parametric Friedman test, using a series of Wilcoxon Rank Sum test with a Bonferroni correction as post hocs. Our findings demonstrate that all these varieties have an equal uptake capacity for Al, Cr, Cu, K, Li, Mn, Ni, Pb, S, Sr, Ti, Tl, Zn, N, B, Fe, Mg, Na, and V. No differences related to the gender of the plants were detected. Only Mateur exhibited significantly higher levels of Ca and lower levels of C. Stock plants from an experimental plot were used as material. These plants are not used for productive purposes, and flowering and fruiting are partially restricted by removing potential nutrient-demanding structures. These findings support the contention that the presence/absence of such organs has more influence on the nutrient uptake than does the variety itself.

Źródło:

Journal of Elementology; 2016, 21, 1
1644-2296

Pojawia się w:

Journal of Elementology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 84.

Tytuł:

Epidermal Layers Characterisation by Opto-Magnetic Spectroscopy Based on Digital Image of Skin

Autorzy:

Koruga, Đ.
Bandić, J.
Janjić, G.
Lalović, Č.
Munćan, J.
Dobrosavljević Vukojević, D.

Powiązania:

https://bibliotekanauki.pl/articles/1489823.pdf

Data publikacji:

2012-03

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

43.58.Bh
07.05.Pj
42.79.-e
42.30.-d
42.25.Ja
87.64.Dz

Opis:

According to the most literature data, the skin is usually observed as a simple structure with equivalent electrical model, which includes general properties of epidermis, basal membrane and dermis. In this paper, we analyzed the skin structure as a more complex system. Particularly we analyzed epidermis based on layers approach and its water organization in lipids ordered in sub-layers. Using opto-magnetic spectroscopy method, which is very sensitive to paramagnetic/diamagnetic properties of the tissue, we found out that nanowater structure ordering in lipids of epidermal layers play very important role in skin properties. We use bioimpedance as complementary and compatible method to opto-magnetic spectroscopy in skin characterization. In our investigation we found out the difference of the skin properties of the people who are drinking two different type of water (Z and N). We observed the significant difference in middle part of stratum granulosum, where water-lipid sub-layers exists. These results indicate importance of water nanolayers presence in epidermis and type of drinking water reflecting on human skin properties.

Źródło:

Acta Physica Polonica A; 2012, 121, 3; 606-610
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 85.

Tytuł:

Determination of tramadol hydrochloride and its preparations by acid-base titration in non-aqueous medium

Autorzy:

Vinay, K.B.
Revanasiddappa, H.D.
Rajendraprasad, N.
Raghu, M.S.
Ramesh, P.J.
Xavier, C.M.
Basavaiah, K.

Powiązania:

https://bibliotekanauki.pl/articles/3614.pdf

Data publikacji:

2010

Wydawca:

Instytut Medycyny Wsi

Tematy:

determination
tramadol hydrochloride
preparation
acid-base titration
non-aquatic medium
titrimetry

Źródło:

Journal of Pre-Clinical and Clinical Research; 2010, 04, 1
1898-2395

Pojawia się w:

Journal of Pre-Clinical and Clinical Research

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 86.

Tytuł:

Variation in premaxillary tooth count and a developmental abnormality in a tyrannosaurid dinosaur

Autorzy:

Miyashita, T.
Tanke, D.H.
Currie, P.J.

Powiązania:

https://bibliotekanauki.pl/articles/23378.pdf

Data publikacji:

2010

Wydawca:

Polska Akademia Nauk. Instytut Paleobiologii PAN

Tematy:

paleontology
tooth variation
premaxillary tooth
tooth
developmental abnormality
tyrannosaurid dinosaur
Dinosauria
Theropoda
Tyrannosauridae
tooth count
developmental regulation
Dinosaur Park Formation
Alberta city
Canada

Opis:

Premaxillary tooth count tends to be stable amongst toothed dinosaurs, and most theropods have four teeth in each premaxilla. Only one case of bilaterally asymmetric variation is known in theropod premaxillary dentition, and there is no record of ontogenetic or individual variation in premaxillary tooth count. Based on these observations, a tyrannosaurid left premaxilla with three teeth (TMP 2007.20.124) is an interesting deviation and represents an unusual individual of Daspletosaurus sp. with a developmental abnormality. The lower number of teeth is coupled with relatively larger alveoli, each of which is capable of hosting a larger than normal tooth. This indicates that tooth size and dental count vary inversely, and instances of reduction in tooth count may arise from selection for increased tooth size. On the other hand, the conservative number of premaxillary teeth in most theropods implies strong developmental constraints and a functional trade−off between the dimensions of the premaxillary alveolar margin and the size of the teeth. In light of recent advances in the study of tooth morphogenesis, tooth count is a function of two parameters: dimensions of an odontogenic field for a tooth series, and dimensions of tooth positions. A probable developmental cause for the low tooth count of TMP 2007.20.124 is that the dimensions of the alveoli expanded by approximately a third during tooth morphogenesis. Numerical traits such as tooth count are difficult to treat in a phylogenetic analysis. When formulating a phylogenetic character, a potential alternative to simply counting is to rely on the morphological signature for developmental parameters that control the number of the element in question.

Źródło:

Acta Palaeontologica Polonica; 2010, 55, 4
0567-7920

Pojawia się w:

Acta Palaeontologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 87.

Tytuł:

Effect of magnetite composite on the amount of double strand breaks induced with X-rays

Autorzy:

Wiecheć, A.
Nowicka, K.
Błażewicz, M.
Kwiatek, W.

Powiązania:

https://bibliotekanauki.pl/articles/1065182.pdf

Data publikacji:

2016-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

87.50.-a
87.53.-j
81.05.Mh
81.05.Ni
81.05.Pj
81.05.Qk
75.50.Bb

Opis:

The aim of this study was to find out if polylactide (PLA) modified with magnetite might affect the amount of DNA double strand breaks induced with X-rays. The human osteosarcoma cells (MG63) were seeded on the polystyrene cell culture dishes (PS), PLA and PLA modified with magnetite substrates. The double strand breaks were analyzed after X-ray irradiation (dose rate 2 Gy/min), in the first day of culturing. The number of double strand breaks increased in the PLA modified with magnetite, for example after 1 Gy of X-rays irradiation, double strand breaks/cell equaled: 24.5 vs. 17.5 and 17.3, for PLA modified with magnetite vs. PLA and PS, p < 0.0003. We conclude that PLA modified with magnetite changed the number of double strand breaks induced with X-rays. However, more research is needed to confirm that such composite might be considered as radiosensitizer in radiotherapy.

Źródło:

Acta Physica Polonica A; 2016, 129, 2; 174-175
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 88.

Tytuł:

Application of remote sensing indices in determining the interrelation between condition of tree stands and myrmecofauna in forests of Wigry National Park

Autorzy:

Chiliński, M.T.
Czajkowska, K.
Krzysztofiak, L.
Mazurkiewicz, P.J.

Powiązania:

https://bibliotekanauki.pl/articles/2130428.pdf

Data publikacji:

2018

Wydawca:

Uniwersytet Przyrodniczy w Poznaniu

Tematy:

red wood ants
myrmecofauna
forest ecosystems
vegetation indices
remote sensing
RPAS
drone
NDVI

Opis:

Presented work is aimed at investigating potential correlations between remote sensing vegetation indices and local ant populations. Research was conducted in summer of 2017 in Wigry National Park in two types of forest habitats: coniferous (Serratulo-Pinetum) and deciduous (Tilio-Carpinetum). NDVI and MCARI2 vegetation indices were measured with the use of a drone and yielded comparable correlations with ant-related quantities. We determined that the presence of ants from Formica group is positively correlated with vegetation indices, while the correlation between Myrmica and Lasius ants and vegetation indices is more complex.

Źródło:

Steciana; 2018, 22, 3; 115-121
1689-653X

Pojawia się w:

Steciana

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 89.

Tytuł:

Application of Graphics Processing Unit for In-Line Electron Holography

Autorzy:

Morawiec, K.
Dłużewski, P.
Kret, S.
Szczepańska, A.
Li, T.
Sloan, J.

Powiązania:

https://bibliotekanauki.pl/articles/1033020.pdf

Data publikacji:

2017-05

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

68.37.Lp
68.37.Og
68.55.Nq
42.30.Rx
61.05.jp
07.05.Pj
42.30.-d
42.30.Wb

Opis:

In the present work, software for exit electron wave reconstruction based on the iterative approach was implemented and a new method for drift-correction of the focal series was proposed.

Źródło:

Acta Physica Polonica A; 2017, 131, 5; 1353-1356
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 90.

Tytuł:

Optimal expression and purification of sapelovirus A structural protein VP1, and its immunogenicity in mice

Autorzy:

Zhao, T.T.
Cui, L.
Chen, L.
Li, J.J.
Liang, Q.L.
Wu, P.J.
Yu, X.Q.
Zhang, Z.H.
Hua, X.G.

Powiązania:

https://bibliotekanauki.pl/articles/2087686.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

sapelovirus A
prokaryotic expression
purification

Źródło:

Polish Journal of Veterinary Sciences; 2018, 21, 3; 573-579
1505-1773

Pojawia się w:

Polish Journal of Veterinary Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 91.

Tytuł:

Application of Statistical Image Analysis in Quantification of Neutron Radiography Images of Drying

Autorzy:

Fijał-Kirejczyk, I.
Milczarek, J.
Żołądek-Nowak, J.
de Beer, F.
Radebe, M.
Nothnagel, G.

Powiązania:

https://bibliotekanauki.pl/articles/1419614.pdf

Data publikacji:

2012-08

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

87.59.bf
07.05.Pj
61.05.Tv
81.05.Rm
47.56.+r
47.55.nb

Opis:

The statistical approach to the thermal neutron radiography picture analysis is applied to evaluation of the experimental results obtained for drying of rectangular and cylindrical samples of granulated and rigid porous materials. We have shown that the time dependence of the standard deviation of image brightness reflects the appearance and motion of the drying front observed during second period of the drying process. The results are discussed within a simple two-region model of the drying sample image.

Źródło:

Acta Physica Polonica A; 2012, 122, 2; 410-414
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 92.

Tytuł:

The teeth of the unenlagiine theropod Buitreraptor from the Cretaceous of Patagonia, Argentina, and the unusual dentition of the Gondwanan dromaeosaurids

Autorzy:

Gianechini, F.A.
Makovicky, P.J.
Apesteguia, S.

Powiązania:

https://bibliotekanauki.pl/articles/20408.pdf

Data publikacji:

2011

Wydawca:

Polska Akademia Nauk. Instytut Paleobiologii PAN

Tematy:

tooth
unenlagiine theropod
theropod
Buitreraptor
Cretaceous
Patagonia
Argentina
dentition
Gondwanan dromaeosaurid
dromaeosaurid
Theropoda
Dromaeosauridae
Unenlagiinae
Dinosauria
paleontology
dinisaur tooth

Opis:

The Unenlagiinae is a clade of Gondwanan dromaeosaurid theropods mainly known from incomplete skeletal material. The group includes two recently discovered theropods, Buitreraptor and Austroraptor, from which cranial remains are available with in situ maxillary and dentary teeth, thus allowing the study of tooth morphology. Among the derived traits that diagnose the dentition of unenlagiines are: (i) high tooth count, (ii) small size of individual teeth when compared with skull height, (iii) absence of denticles and carinae, and (iv) presence of longitudinal grooves on the tooth crown. This suite of dental characteristics, shared between Buitreraptor and Austroraptor, can be considered as diagnostic of the Unenlagiinae or, at least, a more exclusive clade within the group. The teeth of Buitreraptor exhibit a remarkable labiolingual compression, whereas Austroraptor possesses more conical teeth, probably respective autapomorphic features. On one hand, these dental morphologies differ from those observed in most Laurasian dromaeosaurids and, for instance, could be considered as further proof of the purported vicariant evolution of the lineage on the southern continents. On the other hand, the morphological similarities (e.g., absence of denticles) between the teeth of unenlagiines and other theropod lineages, including Mesozoic birds and ornithomimosaurs, can be considered as the result of parallel trends related to dental reduction.

Źródło:

Acta Palaeontologica Polonica; 2011, 56, 2
0567-7920

Pojawia się w:

Acta Palaeontologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 93.

Tytuł:

The microstructure and thermal stability of the two-component melt-spun Ni₅₅Fe₂₀Cu₅P₁₀B₁₀ TCMS amorphous/amorphous composite

Autorzy:

Ziewiec, K.
Wojciechowska, M.
Prusik, K.
Mucha, D.
Jankowska-Sumara, I.

Powiązania:

https://bibliotekanauki.pl/articles/1075849.pdf

Data publikacji:

2016-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.05.cp
61.05.J-
81.05.Kf
81.05.Pj
72.15.Cz
68.60.Dv

Opis:

The aim of this study is to present the special features and properties of the two alloys of similar average chemical composition Ni₅₅Fe₂₀Cu₅P₁₀B₁₀, processed through two different routes. The first alloy was melt-spun after the ejection of homogeneous liquid using a traditional single chamber crucible, and the second alloy was ejected from a double chamber crucible as two separate liquids: i.e., Ni₄₀Fe₄₀B₂₀ and Ni₇₀Cu₁₀P₂₀, mixing only at the orifice area. The studies of the microstructure of the composite alloy were performed through the use of transmission electron microscopy and scanning electron microscopy. The Ni₅₅Fe₂₀Cu₅P₁₀B₁₀ two-chamber melt-spun (TCMS) alloy, as well as the homogeneous Ni₅₅Fe₂₀Cu₅P₁₀B₁₀, Ni₄₀Fe₄₀B₂₀, and Ni₇₀Cu₁₀P₂₀ alloys, were heated to elevated temperatures and their characteristics studied by means of differential scanning calorimetry. The temperature resistivity change method was applied to the examination of the Ni₅₅Fe₂₀Cu₅P₁₀B₁₀ TCMS alloy. The phase composition after heat treatment was investigated using X-ray diffraction. The results of the microstructure examination show that the TCMS alloy is an amorphous/amorphous composite, and is notable for its Ni-Fe-B and Ni-Cu-P stripes resulting from its differentiated chemical composition. Another unique feature of the TCMS alloy is that it retains its wood-like morphology even after high-temperature heat treatment. The crystallisation of the TCMS alloy starts from the Ni-Cu-P constituent and ends with the Ni-Fe-B areas of the sample. The results are discussed on the basis of previous work completed on amorphous matrix composites.

Źródło:

Acta Physica Polonica A; 2016, 130, 4; 927-930
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 94.

Tytuł:

Ocena dokładności ortorektyfikacji obrazów SSC z satelity TerraSAR-X oraz weryfikacja geometrii przetworzonych obrazów dostarczanych przez dystrybutora
Accuracy assessment of TerraSAR-X orthorectification and geometry verification of geocoded images supplied by the distributor

Autorzy:

Koza, P.J.
Różycki, S.

Powiązania:

https://bibliotekanauki.pl/articles/130796.pdf

Data publikacji:

2008

Wydawca:

Stowarzyszenie Geodetów Polskich

Tematy:

TerraSAR-X
SAR
ortorektyfikacja
geometria
EEC
GEC
SSC
orthorectification
geometry

Opis:

Mikrofalowy sensor satelity TerraSAR-X umożliwia pozyskanie całej gamy różnorodnych produktów mogących znaleźć zastosowanie w zarządzaniu kryzysowym, kartografii, hydrologii, rolnictwie, leśnictwie i geologii. Artykuł prezentuje wyniki analizy dokładności geometrycznej produktów z satelity TerraSAR-X o rozdzielczości około 4 metrów oraz 1 metr, jak również przedstawia dokładność wyników ortorektyfikacji obrazów SSC o metrowej rozdzielczości.
TerraSAR-X, a German satellite, works in three modes: SpotLight (SL), StripMap (SM), and ScanSAR (SS) with maximum azimuth resolutions of 1, 3, and 16 m, respectively. The images are distributed both in raw a raw or a georeferenced format. Due to the variety of products, it has been claimed that the geometry of those images should be investigated. The first part of the paper presents verification of geometric precision of geocoded products generated by the distributor. Images at the EEC (Enhanced Ellipsoid Corrected) and GEC (Geocoded Ellipsoid Corrected) levels were examined. The EEC product affected by the terrain heights, while the GEC product is affected by the mean height of terrain. Two test areas were selected: one in Kozienice, with SM mode images and the other in Wroclaw, with SL images. Control points were collected on reference orthophotomaps from the IRS-P6 satellite and with an ADS-40 airborne digital camera. The results showed the GEC product to have a low accuracy, while the EEC products are of a high accuracy (RMS error of 3-4 pixels). The second part of the paper presents orthorectification results for the Wroclaw test area.A raw image in the SSC format was used. It was shown that, with 10 control points and a SAR model correction both in azimuth and slant range direction, the accuracy of 2 pixels can be achieved. Verification of TerraSAR-X geometry accuracy formed a part of a project carried out in cooperation with the Geosystems Polska, the distributor of TerraSAR-X images from Poland. All the work was conducted in the ErdasImagine environment.

Źródło:

Archiwum Fotogrametrii, Kartografii i Teledetekcji; 2008, 18a; 293-304
2083-2214
2391-9477

Pojawia się w:

Archiwum Fotogrametrii, Kartografii i Teledetekcji

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 95.

Tytuł:

A new basal eusauropod from the Middle Jurassic of Yunnan, China, and faunal compositions and transitions of Asian sauropodomorph dinosaurs

Autorzy:

Xing, L.
Miyashita, T.
Currie, P.J.
You, H.
Zhang, J.
Dong, Z.

Powiązania:

https://bibliotekanauki.pl/articles/945600.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Instytut Paleobiologii PAN

Tematy:

Dinosauria
Sauropoda
Eusauropoda
Jurassic
eusauropod
paleontology
Middle Jurassic
Yunnan province
China
fauna composition
transition
Asia
sauropodomorph dinosaur
dinosaur

Opis:

Many sauropod ghost lineages cross the Middle Jurassic, indicating a time interval that requires increased sampling. A wide taxonomic spectrum of sauropodomorphs is known from the Middle Jurassic of China, but the braincase of a new sauropod, named here Nebulasaurus taito gen. et sp. nov., is distinct. Nebulasaurus is sister taxon to Spinophorosaurus from the Middle Jurassic of Africa and represents a clade of basal eusauropods previously unknown from Asia. The revised faunal list indicates dramatic transitions in sauropodomorph faunas from the Jurassic to Cretaceous of Asia; these are consistent with geographic isolation of Asia through the Late Jurassic. Non-sauropod sauropodomorphs, non-mamenchisaurid eusauropods (including basal macronarians), and mamenchisaurids successively replaced previous grades through the Jurassic, and titanosauriforms excluded all other sauropod lineages across the Jurassic–Cretaceous boundary.

Źródło:

Acta Palaeontologica Polonica; 2015, 60, 1; 145-154
0567-7920

Pojawia się w:

Acta Palaeontologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 96.

Tytuł:

Simulation of climate change impacts on grain sorghum production grown under free air CO2 enrichment

Autorzy:

Fu, T.
Ko, J.
Wall, G.W.
Pinter,Jr., P.J.
Kimball, B.A.
Ottman, M.J.
Kim, H.-Y.

Powiązania:

https://bibliotekanauki.pl/articles/26201.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

crop simulation
climate change
grain yield
sorghum
Sorghum bicolor
productivity
plant production
carbon dioxide

Źródło:

International Agrophysics; 2016, 30, 3
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 97.

Tytuł:

Split Euler Tours In 4-Regular Planar Graphs

Autorzy:

Couch, PJ
Daniel, B.D.
Guidry, R.
Paul Wright, W.

Powiązania:

https://bibliotekanauki.pl/articles/31341188.pdf

Data publikacji:

2016-02-01

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

4-regular
3-connected
planar
split Euler tour
NP-complete

Opis:

The construction of a homing tour is known to be NP-complete. On the other hand, the Euler formula puts su cient restrictions on plane graphs that one should be able to assert the existence of such tours in some cases; in particular we focus on split Euler tours (SETs) in 3-connected, 4-regular, planar graphs (tfps). An Euler tour S in a graph G is a SET if there is a vertex v (called a half vertex of S) such that the longest portion of the tour between successive visits to v is exactly half the number of edges of G. Among other results, we establish that every tfp G having a SET S in which every vertex of G is a half vertex of S can be transformed to another tfp G′ having a SET S′ in which every vertex of G′ is a half vertex of S′ and G′ has at most one point having a face configuration of a particular class. The various results rely heavily on the structure of such graphs as determined by the Euler formula and on the construction of tfps from the octahedron. We also construct a 2-connected 4-regular planar graph that does not have a SET.

Źródło:

Discussiones Mathematicae Graph Theory; 2016, 36, 1; 23-30
2083-5892

Pojawia się w:

Discussiones Mathematicae Graph Theory

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 98.

Tytuł:

Udział polskich i zagranicznych odmian Lolium perenne L. w runi łąki pobagiennej
A share of Polish and foreign cultivars of Lolium perenne L. in the sward of postboggy meadow

Autorzy:

Kulik, M.
Baryła, R.
Warda, M.
Stamirowska-Krzaczek, E.
Domański, P.J.

Powiązania:

https://bibliotekanauki.pl/articles/11236672.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie

Tematy:

laki pobagienne
run lakowa
Lolium perenne
odmiany roslin
odmiany krajowe
odmiany zagraniczne

Źródło:

Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura; 2015, 70, 1; 51-60
0365-1118

Pojawia się w:

Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 99.

Tytuł:

A 1.67 pJ/Conversion-step 8-bit SAR-Flash ADC Architecture in 90-nm CMOS Technology

Autorzy:

Khatak, Anil
Kumar, Manoj
Dhull, Sanjeev

Powiązania:

https://bibliotekanauki.pl/articles/1844527.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

analog to digital converter
ADC
successive approximation register (SAR)
common mode current feedback gain boosting
CMFD-GB
residue amplifier
RA
spurious free dynamic range
SFDR
integral nonlinearity
INL
differential nonlinearity
DNL

Opis:

A novice advanced architecture of 8-bit analog to digital converter is introduced and analyzed in this paper. The structure of proposed ADC is based on the sub-ranging ADC architecture in which a 4-bit resolution flash-ADC is utilized. The proposed ADC architecture is designed by employing a comparator which is equipped with common mode current feedback and gain boosting technique (CMFD-GB) and a residue amplifier. The proposed 8 bits ADC structure can achieve the speed of 140 mega-samples per second. The proposed ADC architecture is designed at a resolution of 8 bits at 10 MHz sampling frequency. DNL and INL values of the proposed design are -0.94/1.22 and -1.19/1.19 respectively. The ADC design dissipates a power of 1.24 mW with the conversion speed of 0.98 ns. The magnitude of SFDR and SNR from the simulations at Nyquist input is 39.77 and 35.62 decibel respectively. Simulations are performed on a SPICE based tool in 90 nm CMOS technology. The comparison shows better performance for this proposed ADC design in comparison to other ADC architectures regarding speed, resolution and power consumption.

Źródło:

International Journal of Electronics and Telecommunications; 2021, 67, 3; 347-354
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 100.

Tytuł:

Mössbauer Studies of Cu(II) Ions Interaction with the Non-Heme Iron and Cytochrome b$\text{}_{559}$ in a Chlamydomonas reinhardtii PSI Minus Mutant

Autorzy:

Burda, K.
Kruk, J.
Strzałka, K.
Stanek, J.
Schmid, G. H.
Kruse, O.

Powiązania:

https://bibliotekanauki.pl/articles/2044646.pdf

Data publikacji:

2006-03

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

82.39.Jn
82.39.Rt
82.50.Nd
87.15.He
87.64.Pj
89.60.Fe

Opis:

Mössbauer spectroscopy was applied, for the first time, to study the interaction of copper ions with the non-heme iron and the heme iron of cytochrome b$\text{}_{559}$ in photosystem II thylakoids isolated from a Chlamydomonas reinhardtii photosystem I minus mutant. We showed that copper ions oxidize the heme iron and change its low spin state into a high spin state. This is probably due to deprotonation of the histidine coordinating the heme. We also found that copper preserves the non-heme iron in a low spin ferrous state, enhancing the covalence of iron bonds as compared to the untreated sample. We suggest that a disruption of hydrogen bonds stabilizing the quinone-iron complex by Cu$\text{}^{2+}$ is the mechanism responsible for a new arrangement of the binding site of the non-heme iron leading to its more "tense" structure. Such a diamagnetic state of the non-heme iron induced by copper results in a magnetic decoupling of iron from the primary quinone acceptor. These results indicate that Cu does not cause removal of the non-heme iron from its binding site. The observed Cu$\text{}^{2+}$ action on the non-heme iron and cytochrome b$\text{}_{559}$ is similar to that previously observed forα-tocopherol quinone.

Źródło:

Acta Physica Polonica A; 2006, 109, 3; 237-247
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce