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Wyświetlanie 1-15 z 77
Tytuł:
A checklist of leech species from Poland
Autorzy:
Bielecki, A.
Cichocka, J.M.
Jelen, I.
Swiatek, P.
Adamiak-Brud, Z.
Powiązania:
https://bibliotekanauki.pl/articles/837743.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
Hirudinida
medical leech
Polska
checklist
distribution
host
leech
leech species
Hirudo medicinalis
species list
Źródło:
Annals of Parasitology; 2011, 57, 1
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A checklist of leech species from Poland
Autorzy:
Bielecki, A.
Cichocka, J.M.
Jeleń, I.
Świątek, P.
Adamiak-Brud, Z.
Powiązania:
https://bibliotekanauki.pl/articles/2143288.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
Hirudinida
medical leech
Polska
checklist
distribution
host
leech
leech species
Hirudo medicinalis
species list
Opis:
In this study 47 leech species from Poland are listed. They belong to two orders, two suborders, five families and 17 genera. The checklist also includes the information about hosts, distribution in Poland and references concerning the leech species discussed in this study.
Źródło:
Wiadomości Parazytologiczne; 2011, 57, 1; 11-20
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza topografii powierzchni materiałów polimerowych, stosowanych jako podłoża do hodowli chondrocytów techniką AFM
Analysis of the surface topography of polymeric substrata for chondrocyte culture using the AFM technique
Autorzy:
Szczerba, J.
Orchel, A.
Jelonek, K.
Kasperczyk, J.
Jurusik, J.
Dobrzyński, P.
Bielecki, I.
Dzierżewicz, Z.
Powiązania:
https://bibliotekanauki.pl/articles/285131.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
polimery
polymers
Opis:
Przy pomocy mikroskopu sił atomowych przeprowadzono analizę topografii powierzchni materiałów polimerowych w aspekcie badań adhezji i proliferacji komórek chondrocytów. Hodowle komórkowe prowadzono na płytkach opłaszczonych kopolimerami laktydu z glikolidem lub laktydu z trimetylenowęglanem. Kopolimer statystyczny laktydu z glikolidem 85/15 otrzymany w kopolimeryzacji wobec inicjatora cyrkonowego okazał się obiecującym materiałem o potencjalnym zastosowaniu jako nośnika chondrocytów w terapii defektów tkanki chrzęstnej.
The analysis of the surface topography of polymeric materials in aspect of chondrocyte adhesion and proliferation was performed using atomic force microscope technique. Dishes coated with biodegradable copolymers of lactide with glycolide and lactide with trimethylenocarbonate were used in cell culture. Random poly(L-lactide-co-glycolide) 85/15 obtained in the copolymerization with zirconium initiator proved the promising material, which can be used as the carrier of chondrocytes in therapy of the cartilaginous tissues defects.
Źródło:
Engineering of Biomaterials; 2007, 10, no. 63-64; 55-58
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Free-Space Optics Development
Autorzy:
Mikołajczyk, J.
Bielecki, Z.
Bugajski, M.
Piotrowski, J.
Wojtas, J.
Gawron, W.
Szabra, D.
Prokopiuk, A.
Powiązania:
https://bibliotekanauki.pl/articles/221245.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
optical communications
open path laser communications
line of sight communications
free space optics
Opis:
The article presents state of work in technology of free-space optical communications (Free Space Optics - FSO). Both commercially available optical data links and their further development are described. The main elements and operation limiting factors of FSO systems have been identified. Additionally, analyses of FSO/RF hybrid systems application are included. The main aspects of LasBITer project related to such hybrid technology for security and defence applications are presented.
Źródło:
Metrology and Measurement Systems; 2017, 24, 4; 653-674
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Quantum Cascade Lasers in Nitric Oxide and Nitrous Oxide Detection
Autorzy:
Wojtas, J.
Bielecki, Z.
Stacewicz, T.
Mikolajczyk, J.
Medrzycki, R.
Rutecka, B.
Powiązania:
https://bibliotekanauki.pl/articles/1493346.pdf
Data publikacji:
2011-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.07.Df
42.25.Dd
42.55.Px
42.60.Da
42.62.Fi
Opis:
Application of quantum cascade lasers in NO and $N_2O$ sensor is described. Cavity enhanced absorption spectroscopy was used for this purpose. The detection was performed at vibronic molecular transitions in spectral regions of 5.23-5.29 μm and 4.46-4.54 μm for NO and $N_2O$, respectively. In order to avoid interferences by the gases contained in atmosphere $(H_2O, CO_2)$ the lines of 5.263 μm for NO and 4.530 μm for $N_2O$ were selected. Our two channel sensor is designated for simultaneous detection of both compounds. Each channel consists of single mode quantum cascade laser, optical cavity, and a photodetection module. The lasers were precisely tuned to the wavelength of interest. Optical cavities were built with spherical mirrors of high reflectance. The signals from the cavities outputs were registered with specially developed low noise detection modules.
Źródło:
Acta Physica Polonica A; 2011, 120, 4; 794-797
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of quantum cascade lasers to trace gas detection
Autorzy:
Bielecki, Z.
Stacewicz, T.
Wojtas, J.
Mikołajczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/201703.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
absorption spectroscopy
biomarkers
sensors
gas sensors
cavity enhanced spectroscopy
photoacoustic spectroscopy
spektroskopia absorpcyjna
biomarkery
czujniki gazu
spektroskopia wzmocniona
spektroskopia fotoakustyczna
Opis:
The potential of Quantum Cascade Laser technology has been recently harnessed in industry, medicine and military to create a range of original infrared gas sensors. These sensors have opened up many new applications due to compact size, excellent sensitivity, robust construction and low power requirements. They rely on infrared absorption spectroscopy to determine identity and quantity of gases. The measurement of these gases has relied on different technologies including multi-pass spectroscopy, photoacoustic spectroscopy, cavity ring down spectroscopy, and their various modifications. In this review paper some technologies are described in terms of its advantages/disadvantages in many application. The results of own works about methane, ammonia, nitric oxide, nitrous oxide, and carbonyl sulfide detection are presented as well.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 2; 515-525
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applications of the Cracow X-Ray Microprobe in Tomography
Autorzy:
Bielecki, J.
Bożek, S.
Lekki, J.
Stachura, Z.
Kwiatek, W.
Powiązania:
https://bibliotekanauki.pl/articles/1809463.pdf
Data publikacji:
2009-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.59.-e
87.57.Q-
Opis:
A nuclear microprobe at the IFJ PAN in Cracow has found numerous applications in different fields of research, mostly in biophysics, medical sciences, geology, and material research. In order to extend the research possibilities, a new X-ray microprobe was constructed. This new microprobe consists of three experimental lines dedicated to: (i) X-ray irradiation of biological specimens, (ii) elemental analysis of samples by micro X-ray fluorescence or total reflection X-ray fluorescence methods and (iii) computer microtomography. In this paper the computer microtomography line was described. The line consists of an open type Hamamatsu L9191 X-ray tube with microfocusing to about 2 μm, a high resolution X-ray sensitive CCD camera, and a precise goniometer composed of six piezoelectric motors. Depending on the required X-ray energy, the Hamamatsu tube is used with Ti, Mo, Ag, or W targets. A small focus size and short focus-to-object distance enable to obtain images of samples with a magnification of more than 1000× and resolution of the order of 2 μm. The computer microtomography measurements are carried out using home developed codes combined with commercial software. Details of the microprobe construction and preliminary results of the computer microtomography experiments are presented.
Źródło:
Acta Physica Polonica A; 2009, 115, 2; 537-541
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applying CEAS method to UV, VIS, and IR spectroscopy sensors
Autorzy:
Wojtas, J.
Mikołajczyk, J.
Nowakowski, M.
Rutecka, B.
Medrzycki, R.
Bielecki, Z.
Powiązania:
https://bibliotekanauki.pl/articles/200113.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
CEAS
N2O
NO
NO2 detection
optoelectronic sensor
Opis:
In the paper, several applications of Cavity Enhanced Absorption Spectroscopy (CEAS) for trace mater detection are described. NO2 sensor was constructed using this technique with blue-violet lasers (395–440 nm). The sensor sensitivity reaches the level of single ppb and it was applied in security portal. For detection of two gases at the same time, two-channel sensor was constructed. Used method allows a significant reduction in the cost of optoelectronic CEAS sensor designed to measure of concentrations of many gases simultaneously. Successful monitoring of N2O and NO in the air requires high precision mid-infrared spectroscopy. The constructed sensors are able to measure concentration at ppb level. These sensors might be used for monitoring of atmospheric purity as well as for detection of explosives.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 4; 415-418
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biological diversity of leeches [Clitellata: Hirudinida] based on characteristics of the karyotype
Autorzy:
Cichocka, J.
Bielecki, A.
Powiązania:
https://bibliotekanauki.pl/articles/838553.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
leech
Clitellata
Hirudinida
internal morphology
external morphology
karyology
biodiversity
cytogenetic analysis
Źródło:
Annals of Parasitology; 2008, 54, 4; 309-314
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biological diversity of leeches [Clitellata: Hirudinida] based on characteristics of the karyotype
Autorzy:
Cichocka, J.
Bielecki, A.
Powiązania:
https://bibliotekanauki.pl/articles/2143806.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
leech
Clitellata
Hirudinida
internal morphology
external morphology
karyology
biodiversity
cytogenetic analysis
Opis:
The majority of studies on leeches are related to: internal and external morphology. Fewer molecular research projects focus on molecular studies and karyology. The latter are needed to explain the evolutionary and systematic issues. Karyotypes for 22 species of Hirudinida have hitherto been determined, including: 8 species belonging to the Glossiphoniidae family, 3 species of Piscicolidae, 7 of Erpobdellidae, 1 of Haemopidae and 3 of Hirudinidae. The chromosome number vary among individual groups of leeches. Within Glossiphoniidae the chromosome diploid number ranges from 14 to 32, in Piscicolidae from 20 to 32, in Erpobdelliformes from 16 to 22, and in Hirudiniformes from 24 to 28. The karyological analyses were used to show phylogenetic relations between main groups of Hirudinida, and the diploid number of 16 was suggested to be a primitive value. This number tends to increase as the evolution progresses. The phylogeny scheme of leeches proposed by Mann shows the Glossiphoniidae as primitive to the Piscicolidae, and Hirudinidae as giving rise to the Haemopidae and Erpobdellidae. Those hypotheses are herewith confronted with morphological, molecular, karyological, ecological and behavioral data.
Źródło:
Wiadomości Parazytologiczne; 2008, 54, 4; 309-314
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bramka bezpieczeństwa z optoelektronicznym czujnikiem NO2
Project of security portals for explosives detection using CEAS sensor
Autorzy:
Wawer, J.
Bielecki, Z.
Mikołajczyk, J.
Wojtas, J.
Mędrzycki, R.
Nowakowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/155348.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
czujnik optoelektroniczny
CEAS
detekcja NO2
bramka bezpieczeństwa
optoelectronic sensor
NO2 detection
security portal
Opis:
W pracy przedstawiono projekt bramki bezpieczeństwa umożliwiającej wykrywanie śladowych ilości par wybranych materiałów wybuchowych. W tym celu opracowano optoelektroniczny sensor ditlenku azotu. W sensorze tym zastosowano metodę spektroskopii strat we wnęce optycznej, zaliczanej do metod o najwyższej czułości. Prezentowany system może być stosowany do kontroli wejść w strategicznych obiektach państwowych i wojskowych oraz użyteczności publicznej, szczególnie o dużym nasileniu ruchu, takich jak lotniska, porty, dworce, stacje metra, itp.
This paper presents a security gateway that allows detection of trace amounts of selected explosives. Most explosives are nitro compounds containing the group-NO2 (Fig. 1) which decompose emitting trace amounts of nitrogen oxides. The optoelectronic sensor designed to detect nitrogen dioxide operates on a basis of the Cavity Enhanced Absorption Spectroscopy (CEAS) method. The CEAS technique is a modification of Cavity Ring Down Spectroscopy (CRDS) technique. It is based on off-axis arrangement of an optical cavity. The gas concentration in this method is determined by measuring the intensity of optical radiation reaching the detector (photomultiplier tube) caused by absorption of radiation λ = 416 nm, Fig. 2, of the gas filling the optical cavity. Fig. 3 shows the measuring system. Preliminary measurement results are illustrated in Fig. 6 which shows the dependence of the decay time of optical radiation in the optical cavity on the concentration of NO2 in the gas filling the cavity. The NO2 detection limit is set at 1 ppb, with the uncertainty of 10%. The presented portal is likely to become a very effective tool for explosives detection. Therefore it could be used to control entries of important objects e.g. airports, government buildings, skyscrapers, military bases, and so on. (Project of the security portals for explosives detection using CEAS sensor).
Źródło:
Pomiary Automatyka Kontrola; 2012, R. 58, nr 3, 3; 245-248
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cavity Enhanced Absorption Spectroscopy Sensor
Autorzy:
Nowakowski, M.
Wojtas, J.
Bielecki, Z.
Mikołajczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/1807740.pdf
Data publikacji:
2009-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.50.Qx
42.79.Sz
43.60.-c
07.07.Df
Opis:
The paper presents opportunities of cavity enhanced absorption spectroscopy technique application in nitrogen oxides (NO_{x}) detection. In this method the concentration of an absorbing gas is determined by measure of decay time of the light pulse trapped in an optical cavity. The measurements are not sensitive to fluctuation of both laser power and photodetector sensitivity. The cavity enhanced absorption spectroscopy technique is a modification of cavity ring down spectroscopy technique where the off-axis adjustment of the resonator is used. NO_{x} detection is carried out in the visible and infrared range. The signal is registered with a developed low noise photoreceiver. Features of the presented sensor show that it is possible to build a portable trace gases sensor. Its sensitivity could be comparable with chemical detectors. Such a system has several advantages: relatively low price, small size and weight, and detection possibility of other gases.
Źródło:
Acta Physica Polonica A; 2009, 116, 3; 363-367
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Compact QCL driver for free-space transmitter
Autorzy:
Mikołajczyk, J.
Garlińska, M.
Wesołowski, M.
Wojtas, J.
Bielecki, Z.
Powiązania:
https://bibliotekanauki.pl/articles/201659.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
free space optics
laser communication
quantum cascade lasers
laser driver
Opis:
The paper presents investigations of a free space optical transmitter operating with quantum cascade lasers. The main goal of the research was to determine influence of lasers driver parameters on an optical data link performance. Using some commercial driving devices, the laser pulse limitations of power, repetition rate and time duration have been observed. In the paper, the preliminary results of the designed laser driver are described. The driver was developed at the Institute of Optoelectronics, MUT in cooperation with scientists from the Faculty Electrical Engineering, WUT. It is characterized by high current efficiency, high pulse repetition rate, and compact construction. Additionally, the driver also includes a controller of Peltier modules
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 4; 763-768
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection of Gaseous Compounds with Different Techniques
Autorzy:
Mikołajczyk, J.
Bielecki, Z.
Stacewicz, T.
Smulko, J.
Wojtas, J.
Szabra, D.
Lentka, Ł.
Prokopiuk, A.
Magryta, P.
Powiązania:
https://bibliotekanauki.pl/articles/220919.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
gas sensors
laser absorption spectroscopy
CEAS
MUPASS
breath analyses
medical screening
Opis:
Sensing technology has been developed for detection of gases in some environmental, industrial, medical, and scientific applications. The main tasks of these works is to enhance performance of gas sensors taking into account their different applicability and scenarios of operation. This paper presents the descriptions, comparison and recent progress in some existing gas sensing technologies. Detailed introduction to optical sensing methods is presented. In a general way, other kinds of various sensors, such as catalytic, thermal conductivity, electrochemical, semiconductor and surface acoustic wave ones, are also presented. Furthermore, this paper focuses on performance of the optical method in detecting biomarkers in the exhaled air. There are discussed some examination results of the constructed devices. The devices operated on the basis of enhanced cavity and wavelength modulation spectroscopies. The experimental data used for analyzing applicability of these different sensing technologies in medical screening. Several suggestions related to future development are also discussed.
Źródło:
Metrology and Measurement Systems; 2016, 23, 2; 205-224
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnostic systems for the nuclear fusion and plasma research in the PF-24 plasma focus laboratory at the IFJ PAN
Autorzy:
Marciniak, Ł.
Wójcik-Gargula, A.
Kulińska, A.
Bielecki, J.
Wiącek, U.
Powiązania:
https://bibliotekanauki.pl/articles/147710.pdf
Data publikacji:
2016
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
diagnostics for DD fusion products
fast neutron sources
plasma diagnostics
plasma focus
plasma imaging
Opis:
This paper presents a set of diagnostics dedicated to PF-24 – new medium size – plasma focus (PF) device built and operated at the Institute of Nuclear Physics Polish Academy of Sciences (IFJ PAN). The PF-24 can operate at energy level up to 93 kJ and charging voltage up to 40 kV. Each condenser is connected with a specially designed spark gap with a very small jitter, which ensures a high efficiency and a low current rise time. The working parameters of PF-24 generator make it a suitable tool for testing new detection systems to be used in fusion research. Four types of such detection systems are presented in this article: three diagnostic systems used to measure electric quantities (Rogowski coil, magnetic probe, capacitance probe), neutron counter based on beryllium activation, fast neutron pinhole camera based on small-area BCF-12 plastic scintillation detectors and high-speed four-frame soft X-ray camera with microchannel plate.
Źródło:
Nukleonika; 2016, 61, 4; 413-418
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 77

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