Skocz do pozycji: 1.

Tytuł:

Przejście do statusu zatrudnionego na pełny etat: analiza empiryczna z wykorzystaniem dwurównaniowego i trójrównaniowego modelu probitowego z endogenicznym przełączaniem

Autorzy:

A, Natalia N E H R E B E C K

Powiązania:

https://bibliotekanauki.pl/articles/701591.pdf

Data publikacji:

2011

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Źródło:

Ekonomista; 2011, 2
0013-3205
2299-6184

Pojawia się w:

Ekonomista

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Combined Effect of Zr and Si on Isothermal Oxidation of Ti

Autorzy:

Ha, S.-H.
Kim, B.-H.
Yoon, Y.-O.
Lim, H.-K.
Kim, S. K.

Powiązania:

https://bibliotekanauki.pl/articles/353260.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Ti
Zr
Si
silicide
oxidation

Opis:

In this study, the combined effect of Zr and Si on isothermal oxidation of Ti for 25 and 50h at 820°C, which is the temperature related to exhaust valves operation, was investigated. Si addition into Ti-5mass%Zr alloy led to a distribution of silicide Ti₅Si₃ phase formed by a eutectic reaction. The Ti sample containing only Zr showed more retarded oxidation rate than Ti-6Al-4V, the most prevalent Ti alloy, at the same condition. However, while a simultaneous addition of Zr and Si resulted in greater increase of oxidation resistance. The oxide layer formed after the addition of Zr and Si comprised TiO₂, ZrO₂, and SiO₂.

Źródło:

Archives of Metallurgy and Materials; 2018, 63, 3; 1493-1495
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Removing lead from Iranian industrial wastewater

Autorzy:

Salmani, B.K.
Amoozegar, M.A.
Babavalian, H.
Tebyanian, H.
Shakeri, F.

Powiązania:

https://bibliotekanauki.pl/articles/11541.pdf

Data publikacji:

2016

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Opis:

Metals and chemicals have been increased in industrial processes which they contain a high level of toxic heavy metals and cause a lot of disadvantages for the environment and human health .Biosorption of Pb (П) ions has been studied from aqueous solutions in a batch system by using a bacterial strain isolated from petrochemical wastewaters. Strain 8-I was selected to study the impact of different factors on removal rate. According to morphological, physiological and biochemical characterizations of the strain and in comparison with other studies the strain was tentatively identified as Bacillus sp strain 8-I. The maximum Lead biosorption capacity of 8-I isolate was determined to be 41.58 % at pH 4.0 with 80 mg/l concentration in 48 hours equilibrium time. The comparison between the biosorption capacity of live (45.50 mg/g), heat inactivated (30.23 mg/g) and NaN3 pretreated biomass (26.86 mg/g) were indicated that the ability of live biomass for both of active and passive uptake of lead.

Źródło:

International Letters of Natural Sciences; 2016, 57
2300-9675

Pojawia się w:

International Letters of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Investigations of plant infections by thermal vision and NIR imaging

Autorzy:

Hellebrand, H.J.
Herppich, W.B.
Beuche, H.
Dammer, K.H.
Linke, M.
Flath, K.

Powiązania:

https://bibliotekanauki.pl/articles/24915.pdf

Data publikacji:

2006

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

plant discrimination
infrared imaging
thermal vision
plant protection
transpiration
plant infection
fungal infection

Źródło:

International Agrophysics; 2006, 20, 1
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Carbon nanopowders in technology drug form

Autorzy:

Skibska, B.
Bodek, K. H.

Powiązania:

https://bibliotekanauki.pl/articles/285643.pdf

Data publikacji:

2016

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

carbon nanopowders
drugs
biotechnology

Źródło:

Engineering of Biomaterials; 2016, 19, 138; 81
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

On a method to employ Newton’s Rings concept to determine thickness of thin films

Autorzy:

Raveesha, K. H.
Doddamani, V. H.
Prasad, B. K.

Powiązania:

https://bibliotekanauki.pl/articles/412571.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Interference
fringes
destructive interference
constructive interference
air wedle

Opis:

Newton’s Rings experiment is traditionally utilized to find radius curvature of a lens. We propose a method in which this same set up can be used to find the thickness of thin films. The working principle is interference. It is based on the fact that, the formation of bright and dark interference fringes is a measure of the thickness of the air film at that point. We present the experimental data. The results from the experiment are in agreement with results obtained through geometry. Further, a method to improvise conventional interference at air wedge experiment which is generally used to determine the thickness of thin films is suggested.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 3; 1-7
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Short-term whole body vibration exercise in adult healthy horses

Autorzy:

Carstanjen, B.
Balali, M.
Gajewski, Z.
Furmanczyk, K.
Bondzio, A.
Remy, B.
Hartmann, H.

Powiązania:

https://bibliotekanauki.pl/articles/30794.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Opis:

The purpose of this study was to analyze the acute effect of whole body vibration exercise (WBVE) on clinical parameters and blood values in horses. Seven horses were exposed to a 10 min WBVE at a frequency of 15-21 Hz. Clinical parameters and venous blood samples were taken before and directly after WBVE. Acute short-term WBVE produced a decrease in serum cortisol (p=0.02) and creatine-kinase (p=0.02) values. Clinical parameters, hematology, fibrinogen, lactate, IGF-I, GGT, creatinine, myeloperoxidase activity and bone marker values were not significantly changed by WBVE. In adult sound horses WBVE was well tolerated and did not cause any sign of measured discomfort.

Źródło:

Polish Journal of Veterinary Sciences; 2013, 16, 2
1505-1773

Pojawia się w:

Polish Journal of Veterinary Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Using monthly rainfall data to estimate rainfall erosivity factor of Iraq

Autorzy:

Al-Shamarti, H.K.A.
Manji, O.B.
Albw Jbianah, M.I.K.

Powiązania:

https://bibliotekanauki.pl/articles/886592.pdf

Data publikacji:

2019

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Źródło:

Scientific Review Engineering and Environmental Sciences; 2019, 28, 3[85]
1732-9353

Pojawia się w:

Scientific Review Engineering and Environmental Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Photon Attenuation Coefficients of Iron Doped Clay at 662~keV

Autorzy:

Akkurt, I.
Mavi, B.
Gunoglu, K.
Akyıldırım, H.
Canakci, H.

Powiązania:

https://bibliotekanauki.pl/articles/1399880.pdf

Data publikacji:

2013-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

29.30.Kv
34.50.Bw

Opis:

After discovery of the radioactivity by Becquerel, radiation started to be used in large fields and it became part of our life nowadays. Using radiation from industry to medicine brings its hazardous effect and radiation protection developed in physics in parallel with the utilization of radiation. Although time, distance and shielding are the main rules to be protected from radiation, shielding is most effective way. In this case development of shielding materials becomes important. Clay is an interesting material and besides using it for different purposes it can be used as plaster material in building construction. In this study iron doped into clay samples and radiation shielding properties has been measured at 662 keV gamma rays. The measurements have been performed using gamma spectrometer system which contains NaI(Tl) and 16k multichannel analyser.

Źródło:

Acta Physica Polonica A; 2013, 123, 2; 343-344
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Galizien im Diskurs. Inklusion, Exklusion, Repräsentation, red. Paula G i e r s c h, Franziska S c h ö ß l e r, Florian K r o b b

Autorzy:

Surman, Jan

Powiązania:

https://bibliotekanauki.pl/articles/708107.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Źródło:

Studia Historyczne; 2013, 2
0025-1429

Pojawia się w:

Studia Historyczne

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Charging Phenomena at the Interface Between High-k Dielectrics and SiOx Interlayers

Autorzy:

Engström, O.
Raeissi, B.
Piscator, J.
Mitrovic, I. Z.
Hall, S.
Gottlob, H. D. B.
Schmidt, M.
Hurley, P. K.
Cherkaoui, K.

Powiązania:

https://bibliotekanauki.pl/articles/308138.pdf

Data publikacji:

2010

Wydawca:

Instytut Łączności - Państwowy Instytut Badawczy

Tematy:

defects
dielectrics
high-k
metal oxide semiconductor

Opis:

The transition regions of GdSiO/SiOx and HfO2/ SiOx interfaces have been studied with the high-k layers deposited on silicon substrates. The existence of transition regions was verified by medium energy ion scattering (MEIS) data and transmission electron microscopy (TEM). From measurements of thermally stimulated current (TSC), electron states were found in the transition region of the HfO2/SiOx structures, exhibiting instability attributed to the flexible structural molecular network expected to surround the trap volumes. The investigations were focused especially on whether the trap states belong to an agglomeration consisting of a single charge polarity or of a dipole constellation. We found that flat-band voltage shifts of MOS structures, that reach constant values for increasing oxide thickness, cannot be taken as unique evidence for the existence of dipole layers.

Źródło:

Journal of Telecommunications and Information Technology; 2010, 1; 10-19
1509-4553
1899-8852

Pojawia się w:

Journal of Telecommunications and Information Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Extraction of sucrose and non-sugars under laboratory conditions

Autorzy:

Lisik, K.
Szwajcowska, K.
Zaorska, H.
Wnuk, B.

Powiązania:

https://bibliotekanauki.pl/articles/1371738.pdf

Data publikacji:

1992

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

extraction
sucrose
sugar technology
non-sugar
food
laboratory condition

Źródło:

Polish Journal of Food and Nutrition Sciences; 1992, 01, 3; 51-60
1230-0322
2083-6007

Pojawia się w:

Polish Journal of Food and Nutrition Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Synteza niektórych azotowych układów hetero cyklicznych oraz ich zastosowanie w komórkach elektroluminescencyjnych
Synthesis of some heterocyclic compounds and application thereof inelectroluminescent cells

Autorzy:

Daniel, A.
Daniel, K.

Powiązania:

https://bibliotekanauki.pl/articles/1287264.pdf

Data publikacji:

2010

Wydawca:

Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem

Tematy:

komórki elektroluminescencyjne
1H-pirazolo[3,4-b]chinoksaliny
1H-pirazolo[3,4-b]chinoliny
bis-pirazolo[3,4-b; 4',3'-e]pirydyny
electroluminescent devices
bis-pyrazolo[3,4-b;4',3'-e]pyridines
1H-pyrazolo[3,4-b]quinolines
1H-pyrazolo[3,4-b]quinoxalines

Opis:

W pracy omówiono syntezę i zastosowanie układów heterocyklicznych, pochodnych 1H-pirazolo[3,4-b]chinolin, 1H-pirazolo[3,4-b]chinoksalin, bis-pirazolo[3,4-b;4',3'-e]pirydyn oraz benzoksazoli w postaci prostych molekuł, oligomerów i polimerów dla urządzeń elektroluminescencyjnych. Zbudowano jedno- lub wielowarstwowe komórki (filmy osadzane próżniowo lub nanoszone za pomocą techniki spin-coating) oraz zbadano ich podstawowe charakterystyki. Uzyskane komórki emitowały światło niebieskie i zielone.
Some nitrogen heterocycles such as 1H-pyrazolo[3,4-b]quinolines, 1H-pyrazolo[3,4-b]quinoxalines, bis-pyrazolo[3,4-b; 4',3'-e]pyridines and benzoxazoles were synthesized. Multilayer devices were fabricated using these dyes. The films were vacuum evaporated or spin-coated from solutions. The devices provided a bright blue, blue-green or green emission.

Źródło:

Chemik; 2010, 64, 7-8; 511-522
0009-2886

Pojawia się w:

Chemik

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Volatile oil composition of Carthamus Tinctorius L. flowers grown in Kazakhstan

Autorzy:

Turgumbayeva, A.A.
Ustenova, G.O.
Yeskalieva, B.K.
Ramazanova, B.A.
Rahimov, K.D.
Aisa, H.
Juszkiewicz, K.T.

Powiązania:

https://bibliotekanauki.pl/articles/2081589.pdf

Data publikacji:

2018

Wydawca:

Instytut Medycyny Wsi

Tematy:

Carthamus tinctorius
Asteraceae
Safflower
phytochemistry
volatile oil

Opis:

Introduction and Objective. Carthamus tinctorius L. is commonly known as Safflower. C. tinctorius extracts and oil are important in drug development with numerous pharmacological activities in the world. This plant is cultivated mainly for its seed which is used as edible oil. For a long time, C. tinctorius has been used in traditional medicines as a purgative, analgesic, antipyretic and an antidote to poisoning. It is a useful plant in painful menstrual problems, post-partum haemorrhage and osteoporosis. Objective. The subject of this study is the seeds of Kazakhstan species of ‘Akmai’ safflower, collected in the flowering stage in Southern Kazakhstan. Volatile oil was carry out to study the component composition of Kazakhstan ‘AkMai’ safflower flowers. Materials and Method. Pale yellow oily extracts were obtain by varying the process parameters. The volatile oil obtained by hydrodistillation of the petals Carthamus tinctorius L. was analyzed by gas chromatography/mass spectrometry (GC/MS). The yield of the oil was 0.175 % (v/w). 20 compounds representing 99.81% of the oil were characterized. The volatile oil was found to be rich in undecanoic acid, octane, 2-nonen -1-ol, hexadecanal, dodecanal, dec-2-en-1-ol, nonanoic acid, tetradecanoic acid, 2 pentadecanone, 6,10,14-trimethyl, 1,2-benzenedicarboxylic acid, isobutyl-beta-phenylpropionate, 1.3-cyclohexadiene, myrtenoic acid, octadecanoic acid, heneicosanoic acid, 2(3H)-furanone, 4,4-dipropylheptane, hexcosane,1-eicosanol, as well as heptocosane. Results. Volatile oil from the flowers of the Kazakhstan safflower species ‘Ak-Mai’ were investigated by GC/MS which allowed the detection of 20 compounds. Biologically active complex of the flower of the Kazakhstan safflower species ‘Ak-Mai’ was released for the first time by using this oil.

Źródło:

Annals of Agricultural and Environmental Medicine; 2018, 25, 1; 87-89
1232-1966

Pojawia się w:

Annals of Agricultural and Environmental Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

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

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Skocz do pozycji: 16.

Tytuł:

Giant Magnetoresistance in Melt-Spun Co-Cu Modified by Rare Earths

Autorzy:

Idzikowski, B.
Rössler, U. K.
Handstein, A.
Nenkov, K.
Müller, K.-H.

Powiązania:

https://bibliotekanauki.pl/articles/2013425.pdf

Data publikacji:

2000-05

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

75.70.Pa
75.50.Tt

Opis:

Samples of the composition RE$\text{}_{x}$Co$\text{}_{20}$Cu$\text{}_{80-x}$, RE = Sm, Gd or Dy (x = 0, 1, and 3) were produced by melt-spinning and subsequent annealing. The magnetoresistance is negative as in granular Co-Cu, but its values depend on the kind of rare earth element added and on changes in the microstructure induced by thermal annealing. An addition of 1 at.% rare earth metal to Co$\text{}_{20}$Cu$\text{}_{80}$ yields a considerable increase in the magnetoresistance ratio, whereas an addition of 3 at.% causes a decrease. E.g., by addition of 1 at.% Dy to Co$\text{}_{20}$Cu$\text{}_{80}$ and optimal thermal treatment, the value of magnetoresistance ratio measured at 10 K in a field of 5 T increases from -14% to -28%. The effect can be attributed to the presence of clusters of hexagonal Dy(Co,Cu)$\text{}_{5}$, which was ascertained from X-ray diffraction data, or other, metastable rare-earth compounds and paramagnetic rare-earth atoms in the Cu matrix.

Źródło:

Acta Physica Polonica A; 2000, 97, 5; 791-794
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

EPR Studies of Carbonized Cellulose - Oxygen Interactions

Autorzy:

Pilawa, B.
Pietrzak, R.
Wachowska, H.
Babeł, K.

Powiązania:

https://bibliotekanauki.pl/articles/2043418.pdf

Data publikacji:

2005-07

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.66.Hq
76.30.Rn

Opis:

EPR examination of cellulose carbonized at 400ºC and 600ºC has been performed. The aim of this work was to search a sample useful as the oximetric probe in biology and medicine. The higher paramagnetic centers concentration characterizes cellulose carbonized at 600ºC, which was found as the sensitive oximetric probe. Quasi-chemical bonds between cellulose molecules and paramagnetic O$\text{}_{2}$ molecules decrease paramagnetic centers concentration. A linear increase in paramagnetic centers concentration and a linear decrease in EPR linewidth with increasing time of sample evacuation were observed for cellulose carbonized at 600ºC. Oxygen affects spin-lattice interactions in carbonized cellulose.

Źródło:

Acta Physica Polonica A; 2005, 108, 1; 151-154
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Dinoflagellate cysts, palynofacies and organic geochemistry of the Cretaceous-Palaeogene (K–Pg) boundary transition at the Ellès section, northeastern Tunisia

Autorzy:

M’Hamdi, A.
Slimani, H.
Ismail-Lattrache, K. B.
Ali, W. B.

Powiązania:

https://bibliotekanauki.pl/articles/191365.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Geologiczne

Tematy:

Cretaceous-Paleogene (K-Pg) boundary
dinoflagellate cysts
palynofacies
organic matter
EllÀs section
Tunisia

Opis:

A palynofacies study carried out across the Cretaceous–Palaeogene (K–Pg) boundary in the El Haria Formation at Ellès, northeastern Tunisia, revealed the presence of organic matter dominated by marine palynomorphs, mainly dinoflagellate cyst assemblages. Continental palynomorphs (sporomorphs) and amorphous organic matter (AOM) are also present in all samples. The total organic carbon (TOC) content is generally less than 0.7 wt.%. The Rock-Eval S1 parameters vary from 0.01 to 0.3 mgHC/g rock. The Rock-Eval S2 parameters vary from 0.15 to 0.57 mgHC/g rock. The hydrogen index (HI) and oxygen index (OI) values range from 61 to 214 mgHC/g TOC and 149 to 638 mgHC/g TOC, respectively. The Tmax values range from 420 to 440°C. The TOC, Rock-Eval pyrolysis and palynofacies analyses indicate that the El Haria Formation is characterized by immature organic matter type II and III and a low thermal alteration index (TAI). Also, the authors present in this paper the biostratigraphic, palaeoenvironmentl and palaeobiogeographic framework for the dinoflagellate cyst assemblages below and above the Cretaceous–Palaeogene boundary in the Ellès section.

Źródło:

Annales Societatis Geologorum Poloniae; 2014, 84, 3; 185-212
0208-9068

Pojawia się w:

Annales Societatis Geologorum Poloniae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Morphological differentiation of leaves in the relict tree Zelkova carpinifolia (Ulmaceae)

Autorzy:

Jasinska, A.K.
Rucinska, B.
Kozlowski, G.
Betrisey, S.
Safarov, H.
Boratynska, K.
Boratynski, A.

Powiązania:

https://bibliotekanauki.pl/articles/41223.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Instytut Dendrologii PAN

Opis:

Zelkova carpinifolia is a relict tree occurring in refugial zones of south-western Eurasia. The main aim of the study was the biometrical comparison of the leaf characteristics of the species sampled in three regions of Transcaucasia. We aimed to test the hypotheses that (1) leaves from vegetative (L) shoots would be larger and more variable than those from fertile (S) shoots, (2) the leaves from the same shoot type express geographic patterns of morphological differentiation, similar to pattern described for genetic markers and (3) to verify the systematic position of Z. hyrcana and Z. carpinifolia subsp. yomraensis. The plant material was collected from 5 populations of Z. carpinifolia, one of Z. hyrcana and one of Z. carpinifolia subsp. yomraensis. The total 1482 leaves, 713 from L- and 769 S-type were measured using 26 characters. Our results show very high level of differences between leaves from the L- and S-type of shoots. The majority of leaf characters did not reveal dependence neither on geographic latitude, longitude and altitude nor on the basic climatic data. The results of multivariate analyses of S leaves revealed three group of populations, namely from (1) Colchis, (2) eastern Caucasus (3) Talysh. Thus, our biometric analyses revealed similar pattern to the haplotypic differentiation of Z. carpinifolia detected using chloroplast markers described in the literature. We did not detected significant differences in the leaf characters between supposed Z. hyrcana and/or Z. carpinifolia subsp. yomraensis, when compared to Z. carpinifolia, thus not confirming their separate taxonomic status.

Źródło:

Dendrobiology; 2015, 74
1641-1307

Pojawia się w:

Dendrobiology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Luminescence Spectra of ZnAl$\text{}_{2}$O$\text{}_{4}$:Cr$\text{}^{3+}$ Spinel Nanopowders

Autorzy:

Luc, H. H.
Nguyen, T. K.
Nguyen, V. M.
Suchocki, A.
Kamińska, A.
Le, V. K.
Nguyen, V. H.
Luong, T. T.

Powiązania:

https://bibliotekanauki.pl/articles/2037040.pdf

Data publikacji:

2003-12

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

78.60.-b
72.80.Ga
81.05.Je
81.05.Mh

Opis:

The synthetic ZnAl$\text{}_{2}$O$\text{}_{4}$ spinels doped with Cr$\text{}^{3+}$ ions are prepared from ZnSO$\text{}_{4}$, Al$\text{}_{2}$(SO$\text{}_{4}$)$\text{}_{3}$, and Cr$\text{}_{2}$(SO$\text{}_{4}$)$\text{}_{3}$. The spinel single phase is detected from X-ray diffraction. Luminescence properties of Cr$\text{}^{3+}$ in ZnAl$\text{}_{2}$O$\text{}_{4}$ were studied by low temperature luminescence and decay measurements. Four luminescence lines at 14570, 14520, 14460, and 14330 cm$\text{}^{-1}$ were found to originate from structure distortion and the line at 14175 cm$\text{}^{-1}$ - from chromium pairs. The broad emission band at about 13540 cm$\text{}^{-1}$ is considered to arise from a new Cr$\text{}^{3+}$ center in ZnCr$\text{}_{2}$O$\text{}_{4}$.

Źródło:

Acta Physica Polonica A; 2003, 104, 6; 581-587
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Similarity of chromosome structure among Populus tremula var. davidiana, Populus alba and their hybrids revealed by FISH karyotype analysis

Autorzy:

Kim, Y.G.
Kwon, S.H.
Kang, H.I.
Yoem, D.B.
Kim, K.W.
Kim, H.H.
Kang, K.S.

Powiązania:

https://bibliotekanauki.pl/articles/2077655.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Instytut Dendrologii PAN

Tematy:

Karyotype analysis
Fluorescence in situ hybridization
Ribosomal DNA site
Poplar
Cytogenetics

Opis:

The genus Populus is one of the important tree species in Korean peninsula and many other coun- tries in the world. It represents the model species of forest genomics because it grows fast and reproduces rapidly. In this reason, their genetic characteristics have been well studied and the whole genome has been sequenced completely in some species. However, cytogenetic study of the genus Populus has been limited. In the present study, karyotypes of Korean aspen (P. tremula var. davidiana), Silver poplar (P. alba) and their two hybrids, Suwon aspen (P. tremula var. glandulosa) and Hyun aspen (P. alba × P. tremula var. glandulsa) were analyzed by means of the fluorescence in situ hybridization (FISH). Root samples were collected from mature trees in the demonstration forest, located at Suwon, Kyonggi province in South Korea. The fresh root cells were examined by DAPI (4’,6-diamidino-2-phenylindole) staining and FISH using 45S rDNA and 5S rDNA probes. As the results, the chromosome compositions of all species were the same as 2n = 38. The karyotype formulas of Korean aspen, Silver poplar, Suwon aspen and Hyun aspen were 28m + 6sm + 4st (2sat), 26m + 10sm (2sat) + 2st, 26m + 12sm (2sat) and 28m + 10sm (2sat), respectively. The four species had one pair of 45S rDNA site and one pair of 5S rDNA site in common with FISH karyotypes. The similarity of FISH karyotypes among four species indicated close genetic relationship and coexistence of their interspecific hybrids. This research will provide genetic information on cytogenetic research of Populus and genetic mapping that can be applied to the breeding program of Populus in the near future.

Źródło:

Dendrobiology; 2020, 83; 68-74
1641-1307

Pojawia się w:

Dendrobiology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Badanie mikrobiologiczne środków kosmetycznych dla dzieci
Microbiological examinations of baby cosmetic preparations

Autorzy:

Burzynska, H.
Maciejska, K.
Bachryj, F.
Barlik, I.
Borowiak, M.
Chybowska, J.
Debska, K.
Frasunkiewicz, B.
Dziurowicz, Z.
Glowacki, M.
Gorecka, E.
Grubner, M.
Jedrzejowska, H.
Juchnowicz, I.
Kubiak, W.
Lichocinska, H.
Maciaszek, A.
Meinhardt, S.
Nowotko, S.
Smykal, B.
Stelmach, W.
Szyszko, K.
Zerger, Z.

Powiązania:

https://bibliotekanauki.pl/articles/875939.pdf

Data publikacji:

1977

Wydawca:

Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny

Tematy:

badania mikrobiologiczne
srodki kosmetyczno-medyczne
dzieci
pasty do zebow
kremy
plyny do kapieli
szampony
zasypki

Źródło:

Roczniki Państwowego Zakładu Higieny; 1977, 28, 6
0035-7715

Pojawia się w:

Roczniki Państwowego Zakładu Higieny

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Response of hoary alyssum (Berteroa incana L.) to UV-B radiation
Reakcja pyleńca pospolitego (Berteroa incana L.) na promieniowanie UV-B

Autorzy:

Stoklosa, A.
Madani, H.
Upadhyaya, M.K.

Powiązania:

https://bibliotekanauki.pl/articles/26729.pdf

Data publikacji:

2012

Wydawca:

Polskie Towarzystwo Botaniczne

Opis:

This greenhouse experiment evaluated the response of hoary alyssum plants, up to the rosette phase, to different levels of UV-B radiation. The experiment was carried out in the chambers, equipped with UV-B lamps, emitting biologically effective UV-B radiation of 0 (control), 4, 6 or 8 kJ. As a result, specific traits of the plants such as: leaf number, lamina length, leaf area, specific leaf weight, relative chlorophyll content and shoot biomass were unaffected by any of the UV-B treatments. Significant reductions in the share of large leaves, leaf stalk length and root biomass were noted for plants growing under 8 kJ UV-BBE.
Celem pracy było zbadanie reakcji pyleńca pospolitego (Berteroa incana L.), do fazy rozety liściowej, na promieniowanie UV-B. Doświadczenie przeprowadzono w warunkach szklarniowych, w komorach wyposażonych w lampy emitujące biologicznie czynne promieniowanie UV-B w stężeniu: 0 (kontrola), 4, 6 i 8 kJ. W wyniku przeprowadzonych badań stwierdzono, że zastosowane promieniowanie nie wpływało na takie cechy roślin, jak: liczba liści, długość blaszki liściowej, powierzchnia liści, specyficzna masa liści (SLW) oraz względna zawartość chlorofilu (w jednostkach SPAD) i masa części nadziemnych. Natomiast zaobserwowano istotną redukcję w udziale dużych liści, w długości ogonków liściowych i biomasie korzeni u roślin eksponowanych na najwyższe, 8 kJ UV-BBE, promieniowanie UV-B.

Źródło:

Acta Agrobotanica; 2012, 65, 2
0065-0951
2300-357X

Pojawia się w:

Acta Agrobotanica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Enhanced Corrosion Resistance of Silicone-Coated Stents by Plasma Treatment

Autorzy:

Kim, H.
Baik, K.
Moon, M.
Sung, C.

Powiązania:

https://bibliotekanauki.pl/articles/1187325.pdf

Data publikacji:

2016-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.65.-b

Opis:

The interfacial bonding of silicone-coated stents was characterized by field emission scanning electron microscopy and anodic potentiodynamic polarization tests. The coaxial in-lens secondary electron imaging revealed partial bonding between silicon rubber and nitinol alloy strips in both primer-treatment and plasma-treatment cases. Several strands between the polymer and stent substrate were observed in both cases and it seems that the bonding strength is the same. However, potentiodynamic polarization tests have shown that the corrosion rates of the plasma-treated nitinol stents were less than half of that of the primer-treated stents, indicating higher corrosion resistance. This enhanced corrosion resistance may be attributed to the modification of the physical properties of the surface of the stents by plasma treatments, making the oxide layer more effective than that of the primer-treated stents.

Źródło:

Acta Physica Polonica A; 2016, 129, 4; 857-860
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Identification of medicinal plant Schisandra chinensis using a potential DNA barcode ITS2

Autorzy:

Li, X.-K.
Wang, B.
Han, R.-C.
Zheng, Y.-C.
Yin, H.-B.
Xu, L.
Zhang, J.-K.
Xu, B.-L.

Powiązania:

https://bibliotekanauki.pl/articles/56996.pdf

Data publikacji:

2013

Wydawca:

Polskie Towarzystwo Botaniczne

Tematy:

identification
internal transcribed spacer
medicinal plant
Schisandra chinensis
DNA barcode

Opis:

To test whether the internal transcribed spacer 2 (ITS2) region is an effective marker for using in authenticating of the Schisandra chinensis at the species and population levels, separately. And the results showed that the wild populations had higher percentage of individuals that had substitution of C→A at site 86-bp than the cultivated populations. At sites 10-bp, 37-bp, 42-bp and 235-bp, these bases of the Schisandra sphenanthera samples differed from that of S. chinensis. Two species showed higher levels of inter-specific divergence than intra-specific divergence within ITS2 sequences. However, 24 populations did not demonstrate much difference as inter-specific and intra-specific divergences were concerned. Both S. chinensis and S. sphenanthera showed monophyly at species level, yet the samples of different populations shown polyphyly at population level. ITS2 performed well when using BLAST1 method. ITS2 obtained 100% identification success rates at the species level for S. chinensis, with no ambiguous identification at the genus level for ITS2 alone. The ITS2 region could be used to identify S. chinensis and S. sphenanthera in the “Chinese Pharmacopoeia”. And it could also correctly distinguish 100% of species and 100% of genera from the 193 sequences of S. chinensis. Hence, the ITS2 is a powerful and efficient tool for species identification of S. chinensis.

Źródło:

Acta Societatis Botanicorum Poloniae; 2013, 82, 4
0001-6977
2083-9480

Pojawia się w:

Acta Societatis Botanicorum Poloniae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Fabrication and Characterization of CoCrFeNiMn High Entropy Alloy Powder Processed by Gas Atomization

Autorzy:

Park, T. G.
Lee, S. H.
Lee, B.
Cho, H. M.
Choi, W. J.
Kim, B. S.
Shin, K. S.
Kim, T.-S.

Powiązania:

https://bibliotekanauki.pl/articles/353649.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

high entropy alloy
gas atomization
spark plasma sintering
CoCrFeNiMn

Opis:

In this study, precisely controlled large scale gas atomization process was applied to produce spherical and uniform shaped high entropy alloy powder. The gas atomization process was carried out to fabricate CoCrFeNiMn alloy, which was studied for high ductility and mechanical properties at low temperatures. It was confirmed that the mass scale, single phase, equiatomic, and high purity spherical high entropy alloy powder was produced by gas atomization process. The powder was sintered by spark plasma sintering process with various sintering conditions, and mechanical properties were characterized. Through this research, we have developed a mass production process of high quality and spherical high entropy alloy powder, and it is expected to expand applications of this high entropy alloy into fields such as powder injection molding and 3D printing for complex shaped components.

Źródło:

Archives of Metallurgy and Materials; 2018, 63, 2; 1055-1059
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Magnetoresistance in Graphene-Based Ferromagnetic/ Rashba Barrier/Ferromagnetic Heterojunction

Autorzy:

Mohammadpour, H.
Hasanirokh, K.

Powiązania:

https://bibliotekanauki.pl/articles/1191228.pdf

Data publikacji:

2016-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

72.80.Vp
73.23.-b
73.22.Pr

Opis:

The quantum tunnelling of spin-polarized electrons through a Rashba barrier on a single layer graphene is studied by the scattering matrix method. It is shown that the magnetoresistance, defined as the difference between conductance at the presence and absence of the Rashba spin-orbit interaction, oscillates with the intensity of interaction. These oscillations are also observed in the conductance versus the potential energy of the barrier.

Źródło:

Acta Physica Polonica A; 2016, 129, 1; 75-78
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Reaction Kinetics and Morphological Study of TiNb2O7 Synthesized by Solid-State Reaction

Autorzy:

Choi, S. H.
Ali, B.
Choi, K. S.
Hyun, S. K.
Sim, J. J.
Choi, W. J.
Joo, W.
Lim, J. H.
Lee, T. H.
Kim, T. S.
Park, K. T.

Powiązania:

https://bibliotekanauki.pl/articles/355326.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

solid state reaction
kinetic analysis
quantitative phase analysis
TiNb2O7 synthesis

Opis:

Although TiNb₂O₇ is regarded as a material with high application potential in lithium-ion batteries (LIBs) and solid-oxide fuel cells (SOFCs), it has been difficult to find suitable cost-effective conditions for synthesizing it on a commercial scale. In this study, TiNb₂O₇ compounds were synthesized by a solid state synthesis process. For stoichiometrically precise synthesis of the TiNb₂O₇ phase, the starting materials, TiO₂ and Nb₂O₅ were taken in a 1:1 molar ratio. Activation energy and reaction kinetics of the system were investigated at various synthesis temperatures (800,1000,1200, and 1400°C) and for various holding durations (1,5,10, and 20 h). Furthermore, change in the product morphology and particle size distribution were also evaluated as a function of synthesis temperature and duration. Additionally, quantitative phase analysis was conducted using the Rietveld refinement method. It was found that increases in the synthesis temperature and holding time lead to increase in the mean particle size from 1 to 4.5 μm. The reaction rate constant for the synthesis reaction was also calculated.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 2B; 1051-1056
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Wykrywanie niektórych związków antybakteryjnych pochodnych fenolu w środkach kosmetycznych
Detection of certain antibacterial derivatives of phenol in cosmetics

Autorzy:

Piekacz, H.
Kiss, E.
Rymaszewska, R.
Zyszczynska, B.
Juraniec, I.
Dolmierksa, K.
Grabka, H.
Boba, M.
Kaczmarczyk, J.
Olszewska, E.
Kmiecik, J.
Poltorak, J.
Cywinska, M.
Glosniak, T.
Sowa, J.
Krzywinska, J.
Brynska, E.
Fuks, T.
Zalewska, H.
Kula, H.
Bialek, K.
Rosochowicz, R.
Niewiarowicz, B.
Lipska, E.
Chabros, J.
Kielar, A.
Kosinska, K.
Kujawska, T.
Modrzejewska, H.
Stankiewicz, J.
Grzesiak, J.
Marczuk, H.
Jarysz, M.
Mazurkiewicz, K.
Apanowicz, A.

Powiązania:

https://bibliotekanauki.pl/articles/873574.pdf

Data publikacji:

1977

Wydawca:

Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny

Tematy:

srodki kosmetyczno-medyczne
zwiazki antybakteryjne
fenol
dezodoranty
szampony
plyny do kapieli
mydla
kremy
dzieci
niemowleta
lata 1975-1976

Źródło:

Roczniki Państwowego Zakładu Higieny; 1977, 28, 4
0035-7715

Pojawia się w:

Roczniki Państwowego Zakładu Higieny

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Wolfgang BEINERT, Zjawienia maryjne (Marienerscheinungen), w: Lexikon für Theologie und Kirche, B. 6, Freiburg-Basel-Wien 3 2006, hrsg. v. W. Kasper m. K. Baumgartner, H. Bürkle, K. Ganzer, K. Kertelge, W. Korff, P. Walter, K. 1369 – 1370 (tłumaczenie polskie)
Wolfgang BEINERT, Zjawienia maryjne (Apparitions of Mary), in: Lexikon für Theologie und Kirche, B. 6, Freiburg-Basel-Wien 3 2006, ed. W. Kasper m. K. Baumgartner, H. Bürkle, K. Ganzer, K. Kertelge, W. Korff, P. Walter, K. 1369 – 1370 (Polish translation)

Autorzy:

Borowski, Wojciech

Powiązania:

https://bibliotekanauki.pl/articles/2147007.pdf

Data publikacji:

2021-12

Wydawca:

Wyższe Seminarium Duchowne Diecezji Elbląskiej w Elblągu

Tematy:

zjawienia maryjne
objawienia

Źródło:

Studia Elbląskie; 2021, 22; 579-580
1507-9058

Pojawia się w:

Studia Elbląskie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Scattering properties of argon gas in the temperature range 87.3-120 K

Autorzy:

Al-Maaitah, I.
Joudeh, B.
Sandouqa, A.
Ghassib, H.

Powiązania:

https://bibliotekanauki.pl/articles/1065068.pdf

Data publikacji:

2016-06

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.25.Bi
64.10.+h
67.10.Fj

Opis:

A theoretical model, based on the Galitskii-Migdal-Feynman formalism, is introduced for determining the scattering properties of argon gas, especially the "effective" total, viscosity and average cross-sections. The effective phase shifts are used to compute the quantum second virial coefficient in the temperature range 87.3-120 K. The sole input is the Hartree-Fock dispersion (HFD-B3) potential. The thermophysical properties of the gas are then calculated. The results are in good agreement with experimental data.

Źródło:

Acta Physica Polonica A; 2016, 129, 6; 1131-1140
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Chemical compounds of extracts from Sarcodon imbricatus at optimized growth conditions

Autorzy:

Sulkowska-Ziaja, K.
Szewczyk, A.
Gdula-Argasinska, J.
Ekiert, H.
Jaskiewicz, J.
Muszynska, B.

Powiązania:

https://bibliotekanauki.pl/articles/67540.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Botaniczne

Opis:

The effect of carbon and nitrogen sources and initial pH and temperature of the medium on the mycelial growth of Sarcodon imbricatus (L.) P. Karst. in axenic liquid culture was investigated. The optimal composition of the medium was found to be: 5% fructose, 1% hydrolysate of casein, 1% yeast extract, and 0.3% KH2PO4 at pH = 6 and incubation temperature of 20°C. In this condition the maximum biomass growth was observed, yielding 10.2 g L−1 of dry weight after 3-week of growth. The medium regarded as optimal for growth of S. imbricatus mycelium was used for the production of the biomass and further chemical analysis. The quantitative and qualitative composition of phenolic acids, fatty acids, and sterols were determined using chromatographic methods. The total content of phenolic acids was 1.86 mg × 100 g−1 DW, with the largest amount of protocatechuic acid (1.27 mg × 100 g−1 DW). Nineteen fatty acids were estimated, including five unsaturated fatty acids, e.g., oleic and α-linolenic acid. The analysis of sterols composition revealed the presence of ergosterol and ergosterol peroxide (197.7 and 200.47 mg × 100 g−1 DW, respectively). These compounds were isolated and confirmed by 1H-NMR. Presented study constitutes the first report on the accumulation of substances (phenolic acids, fatty acids, and sterols) with multidirectional biological activity in the mycelial axenic culture of Sarcodon imbricatus.

Źródło:

Acta Mycologica; 2016, 51, 2
0001-625X
2353-074X

Pojawia się w:

Acta Mycologica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Zawartość cyjanowodoru w kompotach z owoców pestkowych i w winach
Hydrogen cyanide content in compotes from stone fruits and in wines

Autorzy:

Karkocha, I.
Aleksandrowicz, M.
Biskupek, H.
Boba, M.
Cierenkiewicz, N.
Cieslak, E.
Cywinska, M.
Dominiak, I.
Gawrys, J.
Grzesiakowa, J.
Hempel, B.
Kmiecik, J.
Kolakowska, R.
Kula, H.
Lisowska, W.
Mazurkiewicz, K.
Micula, I.
Mieczkowska, K.
Nierzewski, A.
Palonka, L.
Stanilewicz, K.
Stankiewicz, J.
Tokarzewska, M.
Zacharko, K.
Zaleska, K.
Zyszczynska, B.

Powiązania:

https://bibliotekanauki.pl/articles/876752.pdf

Data publikacji:

1973

Wydawca:

Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny

Tematy:

owoce pestkowe
wina
kompoty
zawartosc cyjanowodoru
badania naukowe

Źródło:

Roczniki Państwowego Zakładu Higieny; 1973, 24, 5
0035-7715

Pojawia się w:

Roczniki Państwowego Zakładu Higieny

Dostawca treści:

Biblioteka Nauki

/5

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Tytuł:

Effect Of The Desorption-Recombination Temperature On The Microstructure And Magnetic Properties Of HDDR Processed Nd-Fe-B Powders
Wpływ temperatury desorpcji-rekombinacji na mikrostrukturę i właściwości magnetyczne proszków Nd-Fe-B przetwarzanych metodą HDDR

Autorzy:

Lee, J.-G.
Cha, H.-R.
Liu, S.
Yu, J.-H.
Baek, Y.-K.
Kwon, H.-W.

Powiązania:

https://bibliotekanauki.pl/articles/353723.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Nd-Fe-B
HDDR
permanent magnet
grain boundary
metoda HDDR
magnes trwały
granica ziarna

Opis:

The effect of the desorption-recombination temperature on the microstructure and magnetic properties of hydrogenation-disproportionation-desorption-recombination (HDDR) processed Nd-Fe-B powders was studied. The Nd_xB_6.4Ga_0.3Nb₂0.2Fe_bal (x=12.5-13.5, at.%) casting alloys were pulverized after homogenizing annealing, and then subjected to HDDR treatment. During the HDDR process, desorption-recombination (DR) reaction was induced at two different temperature, 810°C and 820°C. The higher Nd content resulted in enhanced coercivity of the HDDR powder, and which was attributed to the thicker and more uniform Nd-rich phase along grain boundaries. But this uniform Nd-rich phase induced faster grain growth. The remanence of the powder DR-treated at 820°C is higher than that DR-treated at 810°C. In addition, it was also confirmed that higher DR temperature is much more effective to improve squareness.

Źródło:

Archives of Metallurgy and Materials; 2015, 60, 2B; 1499-1501
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Records of the slugs Ariolimax columbianus (Ariolimacidae) and Prophysaon foliolatum (Arionidae) imported into Sweden

Autorzy:

von Proschwitz, T.
Reise, H.
Schlitt, B.
Breugelmans, K.

Powiązania:

https://bibliotekanauki.pl/articles/83320.pdf

Data publikacji:

2017

Wydawca:

Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich

Źródło:

Folia Malacologica; 2017, 25, 4
1506-7629

Pojawia się w:

Folia Malacologica

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 36.

Tytuł:

Optically Active Si:Er Layers Grown by the Sublimation MBE Method

Autorzy:

Stepikhova, M.
Andreev, A.
Andreev, B.
Krasil'nik, Z.
Shmagin, V.
Kuznetsov, V.
Rubtsova, R.
Jantsch, W.
Ellmer, H.
Palmetshofer, L.
Preier, H.
Karpov, Yu.
Piplits, K.
Hutter, H.

Powiązania:

https://bibliotekanauki.pl/articles/1992203.pdf

Data publikacji:

1998-09

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.15.Hi

Opis:

We report the first application of sublimation molecular beam epitaxy to grow uniformly and selectively doped Si:Er layers with Er concentration up to 5×10$\text{}^{18}$ cm$\text{}^{-3}$. The Hall concentration of electrons is about 10% of total Er contents. The mobility is 300-400 cm$\text{}^{2}$ V$\text{}^{-1}$ s$\text{}^{-1}$ at 300 K. All samples exhibit photoluminescence at 1.537 μm up to 100-140 K.

Źródło:

Acta Physica Polonica A; 1998, 94, 3; 549-554
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Deep-level defects in epitaxial 4H-SiC irradiated with low-energy electrons
Głębokie centra defektowe w warstwach epitaksjalnych 4H-SiC napromieniowanych elektronami o niskiej energii

Autorzy:

Kaminski, P.
Kozubal, M.
Caldwell, J. D.
Kew, K. K.
Van Mil, B. L.
Myers-Ward, R. L.
Eddy, C. R. jr.
Gaskill, D. K.

Powiązania:

https://bibliotekanauki.pl/articles/192318.pdf

Data publikacji:

2010

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Technologii Materiałów Elektronicznych

Tematy:

4H-SiC
DLTS
pułapka elektronowa
defekt punktowy
electron trap
point defects

Opis:

Deep level transient spectroscopy (DLTS) has been applied to study defect centers in the epitaxial layers of nitrogen-doped n-type 4H-SiC before and after the irradiation with a dose of 1.0x10¹⁷ cm^-2 of 300-keV electrons. It is shown that the minority carrier lifetime in the as-grown epilayers is predominantly affected by the Z_1/2 center concentration. The capture cross-section of the Z_1/2 center for holes is found to be ˜ 6.0x10^-14 cm². We have tentatively attributed the center to the divacancy V_CV_Si formed by the nearest neighbor silicon and carbon vacancies located in different (h or k) lattice sites. The substantial increase in the Z_1/2 center concentration induced by the low-energy electron irradiation is likely to be dependent on both the residual concentration of silicon vacancies and nitrogen concentration in the as-grown material. Four irradiation-induced deep electron traps with the activation energies of 0.71, 0.78, 1.04 and 1.33 eV have been revealed. The 0.71-eV trap, observed only in the epilayer with a higher nitrogen concentration of 4.0x10¹⁵ cm³, is provisionally identified with the complex defect involving a dicarbon interstitial and a nitrogen atom. The 0.78-eV and 1.04-eV traps are assigned to the carbon vacancy levels for V_C (2-/-) and V_C (-/0), respectively. The 1.33-eV trap is proposed to be related to the dicarbon interstitial.
Niestacjonarną spektroskopię pojemnościową (DLTS) zastosowano do badania centrów defektowych w domieszkowanych azotem warstwach epitaksjalnych 4H-SiC typu n przed oraz po napromieniowaniu dawką elektronów o energii 300 keV, równą 1,0x10¹⁷ cm³. Pokazano, że czas życia mniejszościowych nośników ładunku w warstwach nienapromieniowanych jest zależny głównie od koncentracji centrów Z_1/2. Stwierdzono, że przekrój czynny na wychwyt dziur przez te centra wynosi ˜ 6x10¹⁴ cm². W oparciu o dyskusję wyników badań przedstawionych w literaturze zaproponowano konfigurację atomową centrów Z_1/2. Stwierdzono, że centra te są prawdopodobnie związane z lukami podwójnymi V_CV_Si, utworzonymi przez znajdujące się w najbliższym sąsiedztwie luki węglowe (V_C) i luki krzemowe (V_Si) zlokalizowane odpowiednio w węzłach h i k lub k i h sieci krystalicznej 4H-SiC. Otrzymane wyniki wskazują, że przyrost koncentracji centrów Z_1/2 wywołany napromieniowaniem elektronami o niskiej energii zależny jest zarówno od koncentracji luk krzemowych, jak i od koncentracji azotu w materiale wyjściowym. Wykryto cztery pułapki elektronowe charakteryzujące się energią aktywacji 0,71 eV, 0,78 eV, 1,04 eV i 1,33 eV powstałe w wyniku napromieniowania. Pułapki o energii aktywacji 0,71 eV, które wykryto tylko w warstwie epitaksjalnej o większej koncentracji azotu równej 4x10¹⁵ cm^-3, są prawdopodobnie związane z kompleksami złożonymi z atomów azotu i dwóch międzywęzłowych atomów węgla. Pułapki o energii aktywacji 0,78 eV i 1,04 eV przypisano lukom węglowym znajdującym się odpowiednio w dwóch różnych stanach ładunkowych V_C(2-/-) i V_C(-/0). Pułapki o energii aktywacji 1,33 są prawdopodobnie związane z aglomeratami złożonymi z dwóch międzywęzłowych atomów węgla.

Źródło:

Materiały Elektroniczne; 2010, T. 38, nr 3-4, 3-4; 26-34
0209-0058

Pojawia się w:

Materiały Elektroniczne

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Performance Comparison of Protection Strategies in WDM Mesh Networks

Autorzy:

Singh, H. K.
Aggarwal, S.
Singh, S.
Mohapatra, B.
Nagaria, R. K.
Tiwari, S.

Powiązania:

https://bibliotekanauki.pl/articles/308073.pdf

Data publikacji:

2010

Wydawca:

Instytut Łączności - Państwowy Instytut Badawczy

Tematy:

blocking probability
protection
survivability
switching time
WDM networks

Opis:

Recent development in optical networking employing wavelength division multiplexing (WDM) fulfills the high bandwidth demand applications. Failure of such networks, leads to enormous data and revenue loss. Protection is one of the key techniques, which is used in designing survivable WDM networks. In this paper we compare dedicated and shared protection strategies employed inWDMmesh networks to protect optical networks failure, particularly fiber failure. Dijkstra's shortest path algorithm is considered for carrying out simulations. The paper compares the performance of protection schemes, such as, dedicated path protection (DPP), shared path protection (SPP) and shared link protection (SLP) schemes. Capacity utilization, switching time and blocking probability are the parameters considered to measure the performance of the protection schemes. Simulation results show that, SPP is more efficient in terms of capacity utilization over DPP and SLP schemes, whereas, SLP offered better switching time than both DPP and SPP schemes. The average call drop rate is minimum for shared path protection scheme and maximum for shared link protection scheme.

Źródło:

Journal of Telecommunications and Information Technology; 2010, 1; 62-69
1509-4553
1899-8852

Pojawia się w:

Journal of Telecommunications and Information Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Dietary intake and adipose tissue level of specific fatty acids in a selected group from the Lower Silesia population

Autorzy:

Zatonska, K.
Campos, H.
Ilow, R.
Janik-Koncewicz, K.
Rozanska, D.
Regulska-Ilow, B.
Poltyn-Zaradna, K.
Szuba, A.
Zatonski, W.A.

Powiązania:

https://bibliotekanauki.pl/articles/51394.pdf

Data publikacji:

2012

Wydawca:

Instytut Medycyny Wsi

Opis:

Purpose: The aim of the study was to assess the content of specific fatty acids in the diet and adipose tissue in a selected group of inhabitants of Lower Silesia in Poland. Methods: The study group consisted of 95 inhabitants of Wroclaw and surrounding villages (22 men and 23 women from the urban area, 23 men and 27 women from the rural area). Fatty acid content in subcutaneous fat samples was assessed by gas-chromatography. Dietary assessment was carried out using food frequency questionnaire. Dietary intake was analyzed using computer programme The Food Processor SQL 10.5.2 produced by ESHA Research USA, with a Polish database. Results: Mean daily energy and fatty acids intake was significantly higher among rural than urban inhabitants. Intake of alpha-linolenic acid (ALA), mainly from rapeseed oil, in urban inhabitants was 1.5 g/day in men and 1.6 g/day in women, and in rural inhabitants 2.6 g/day and 2.1 g/day, respectively. Dietary n-6 to n-3 ratio was higher among urban compared to rural inhabitants (6.7 vs. 5.5 among men and 6.4 vs. 5.5 among women, respectively). Content of ALA in adipose tissue was higher in rural women than in urban men (1.08% vs. 0.92% of total fat). Content of eicosapentaenoic acid (EPA) in adipose tissue in rural men (0.04% of total fat) and women (0.05% of total fat) was higher than in urban men (0.01% of total fat). The positive correlation (r=0.43) between the level of EPA in adipose tissue and percentage of energy from dietary EPA was observed among rural men. Overall, positive correlations were found between saturated (SFA) and polyunsaturated (PUFA) n-3 level in adipose tissue and percentage of energy from these fatty acids in a diet (r=0.20 and r=0.22, respectively). Conclusions: Mean daily n-3 fatty acid intake in urban inhabitants was lower than the recommended daily consumption in Poland. The positive correlation between fatty acids level in adipose tissue and dietary fatty acid intake was observed only for EPA among rural men, and in the all-study population for SFA and PUFA n-3. A high n-6 to n-3 ratio in the study group was observed.

Źródło:

Annals of Agricultural and Environmental Medicine; 2012, 19, 3
1232-1966

Pojawia się w:

Annals of Agricultural and Environmental Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Photocatalytic degradation of volatile chlorinated organic compounds with ozone addition

Autorzy:

Ebrahimi, H.
Shahna, F. G.
Bahrami, A.
Jaleh, B.
Abedi, K.

Powiązania:

https://bibliotekanauki.pl/articles/205214.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

photocatalytic oxidation
ozonation
chloroform
chlorobenzene

Opis:

The decomposition of hydrocarbons using combined advanced oxidation methods is largely considered owing to abundant production of OH radicals and the potential economic advantages. In this study, the synergetic effect of ozonation on photocatalytic oxidation of chloroform and chlorobenzene over expanded graphite-TiO₂&ZnO Nano composite was investigated. The effect of introduced ozone concentration and residence time was also examined on removal efficiency. The results showed that the removal efficiency was significantly enhanced by the combined system resulting from the additional oxidation process causing active species to be increased. Increasing the introduced ozone concentration which generates more reactive compounds had a greater effect on the removal efficiency than that of residence time. However, from the mineralization point of view, the residence time had a dominant effect, and the selectivity towards CO₂ was dramatically declined when the flow rate increased. Based on these results, the combined system is preferred due to higher removal efficiency and complete mineralization.

Źródło:

Archives of Environmental Protection; 2017, 43, 1; 65-72
2083-4772
2083-4810

Pojawia się w:

Archives of Environmental Protection

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Microstructure and Mechanical Properties of Hot-deformed AlMg4 Alloys with the Variations of Mn, Fe, and Si Contents

Autorzy:

Lee, Da B.
Kim, Bong H.
Choi, Kweon H.
Yang, Seung Y.
Kim, Nam S.
Ha, Seong H.
Yoon, Young O.
Lim, Hyun K.
Kim, Shae
Hyun, Soong K..

Powiązania:

https://bibliotekanauki.pl/articles/351603.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Al-Mg alloy
intermetallic compounds
homogenization
hot-rolling
microstructure

Opis:

This paper aims to investigate the microstructural evolution and mechanical properties of hot-deformed AlMg4 alloys with Mn, Fe, and Si as the main impurities. For this purpose, solidification behavior and microstructural evolution during hot-rolling and heat-treatment processes are investigated by using theoretical calculations and experimental characterization. The crystallization and morphological transformation of intermetallic Al₃ Fe, Al₆ Mn, and Mg₂ Si phases are revealed and discussed in terms of the variation in chemical composition. Following a homogenization heat-treatment, the effect of heat treatment on the intermetallic compounds is also investigated after hot-rolling. It was revealed that the Mg₂ Si phase can be broken into small particles and spherodized more easily than the Al₃ Fe intermetallic phase during the hot-rolling process. For the Mn containing alloys, both yield and ultimate tensile strength of the hot-rolled alloys increased from 270 to 296 MPa while elongation decreased from 17 to 13%, which can be attributed to Mn-containing intermetallic as well as dispersoid.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 4; 1255-1259
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Environmental pollution and parental smoking influence on the appearance of pseudocroup in children

Autorzy:

Pucher, B.
Jonczyk-Potoczna, K.
Buraczynska-Andrzejewska, B.
Szydlowski, J.
Grzegorowski, M.
Krauss, H.
Piatek, J.
Zukiewicz-Sobczak, W.

Powiązania:

https://bibliotekanauki.pl/articles/50282.pdf

Data publikacji:

2013

Wydawca:

Instytut Medycyny Wsi

Opis:

Objective: The aim of the study was to assess the effect of environmental pollution and parental tobacco smoking on the occurrence of pseudocroup in children. Material and methods: A questionnaire-study was performed in 345 children with pseudocroup admitted to the ENT Dept between 1997–2007. 116 children had smoking and 229 had non-smoking parents. Both groups were compared with respect to environmental pollution (urban, rural), parents’ level of education, household crowding and breast feeding period. The prevalence of upper and lower respiratory tract infections and the presence of allergy were also anlaysed. The results were compared to those performed in the ENT Dept in 1977 -1986. Results: In the group of rural children, 21 were children with pseudocroup from smoking parents and 36 children of nonsmoking parents. Among children living in the urban areas there were 95 from smoking parents and 193 from non-smoking parents. Both non-smoking parents presented a large group of people with a higher level of education, and in the smoking families both parents presented a lower level of education. Analysis of the breast feeding period revealed that it was the longest (up to 9 months) in non-smoking mothers – 21% of the group, and only in 4.3% of smoking mothers.

Źródło:

Annals of Agricultural and Environmental Medicine; 2013, 20, 3
1232-1966

Pojawia się w:

Annals of Agricultural and Environmental Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

On Phonon Dispersion in Alkali Metals

Autorzy:

Gajjar, P. N.
Thakore, B. Y.
Patel, H. K.
Jani, A. R.

Powiązania:

https://bibliotekanauki.pl/articles/1933617.pdf

Data publikacji:

1995-09

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

71.25.Cx
63.20.Dj

Opis:

In the present paper, the calculation of the phonon dispersion relations for alkali metals to second order in a local pseudopotential is discussed in terms of the real-space sum. Different forms of dielectric functions are employed to judge the varying effects of exchange and correlation on the phonon frequencies. The quantitative agreement of phonon frequencies for the alkali metals reflects, satisfactorily, the experimental trend.

Źródło:

Acta Physica Polonica A; 1995, 88, 3; 489-502
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Ca-Modified Co/SBA-15 Catalysts for Hydrogen Production through Ethanol Steam Reforming

Autorzy:

Chiou, J. Y. Z.
Liu, S. W.
Ho, K. F.
Huang, H. H.
Tang, Ch. W.
Wang, Ch. B.

Powiązania:

https://bibliotekanauki.pl/articles/411682.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

cobalt catalysts
ethanol
steam reforming

Opis:

Hydrogen production through steam reforming of ethanol (SRE) over the Ca-modified Co/SBA-15 catalysts was studied herein to evaluate the catalytic activity, stability andthebehavior of coke deposition.The Ca-modified SBA-15 supports were prepared from the Ca(NO3)2•4H2O (10 wt%) which was incorporated to SBA-15 by incipient wetness impregnation (assigned as Ca/SBA-15) and direct hydrothermal (assigned as Ca-SBA-15) method. The active cobalt species from the Co(NO3)2•6H2O (10 wt%) was loaded to SiO2, SBA-15 and modified-SBA-15 supports with incipient wetness impregnation method to obtain the cobalt catalysts (named as Co/SiO2, Co/SBA-15, Co-Ca/SBA-15 and Co/Ca-SBA-15, respectively). The prepared catalysts were characterized by using X-ray diffraction (XRD), temperature programmed reduction (TPR), transmission electron microscopy (TEM) and BET.The catalytic performance of the SRE reaction was evaluated in a fixed-bed reactor.The results indicated that the Co/Ca-SBA-15 catalystwas preferential among these catalysts and the ethanol can be converted completely at 375 °C. The hydrogen yield (YH2) approached 4.76 at 500 °C and less coke deposited. Further, the long-term stabilitytest of this catalyst approached100h at 500 °C and did not deactivate.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 5; 1-16
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Composition and Temperature Dependence of Giant Magnetoresistance in Melt-Spun Co_{x}Cu_{100-x} Ribbons

Autorzy:

Idzikowski, B.
Nenkov, K.
Handstein, A.
Hütten, A.
Müller, K. H.

Powiązania:

https://bibliotekanauki.pl/articles/1964599.pdf

Data publikacji:

1997-08

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

75.70.Pa
72.15.Eb
81.40.Rs

Opis:

Structure, magnetic properties and magnetoresistance in as-quenched and annealed Co$\text{}_{x}$Cu$\text{}_{100-x}$ samples were investigated. Homogeneous metastable Co$\text{}_{x}$Cu$\text{}_{100-x}$ alloys were prepared by the single-roller technique. The maximum value of magnetoresistance is shifted to higher annealing temperatures with increasing measuring temperature. At higher measuring temperatures the magnetoresistance is not saturated in fields as high as 16 T. Susceptibility measurements showed the formation of hcp-structured Co clusters. For small cobalt concentrations there is a transition from giant magnetoresistance to the normal anisotropic magnetoresistance.

Źródło:

Acta Physica Polonica A; 1997, 92, 2; 307-310
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Stripe Phases in the Hubbard Model

Autorzy:

Góra, D.
Rościszewski, K.
Oleś, A. M.

Powiązania:

https://bibliotekanauki.pl/articles/2012901.pdf

Data publikacji:

2000-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

71.27.+a
74.72.-h
75.10.-b
64.60.-i

Opis:

We investigate the magnetic and charge ordering in the stripe phases obtained while using correlated wave functions for finite 8×8 clusters described by the Hubbard model with extended hopping. Nonmagnetic vertical (01) site-centered domain walls and (11) bond-centered stripes are found for the parameters of La$\text{}_{2-x}$Sr$\text{}_{x}$CuO$\text{}_{4}$ and YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{6+x}$, respectively, at doping δ=1/8. The obtained half-filled domain nonmagnetic walls reproduce the maxima observed in neutron scattering for La$\text{}_{2-x}$Sr$\text{}_{x}$CuO$\text{}_{4}$.

Źródło:

Acta Physica Polonica A; 2000, 97, 1; 225-228
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Mikrobiologiczne zanieczyszczenia margaryn: Palma, Maja, Masło roślinne, Vita i Nova
Microbiological contamination of margarines

Autorzy:

Windyga, B.
Borowiak, M.
Ciesielska, B.
Chybowska, J.
Debska, K.
Dziurowicz, Z.
Frasunkiewicz, B.
Glowacki, M.
Gomulkiewicz, H.
Klos, J.
Kozlowska, T.
Krzyzanowski, S.
Kubiak, W.
Lipinska, M.
Maciaszek, A.
Mainhardt, S.
Nowotko, S.
Ostrowska, I.
Smykal, B.
Szyszlo, K.
Tysnicka, B.
Wanacka-Twardela, I.
Wolanczyk, K.
Zerger, S.

Powiązania:

https://bibliotekanauki.pl/articles/877075.pdf

Data publikacji:

1978

Wydawca:

Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny

Tematy:

zanieczyszczenia mikrobiologiczne
zanieczyszczenia zywnosci
drobnoustroje
bakterie
margaryna Palma
margaryna Maja
maslo roslinne
margaryna Nova
margaryna Vita
oznaczanie zawartosci
wyniki badan

Źródło:

Roczniki Państwowego Zakładu Higieny; 1978, 29, 1
0035-7715

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Roczniki Państwowego Zakładu Higieny

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 48.

Tytuł:

Electronic Phase Transition in Layered Materials 1T-TaS$\text{}_{x}$Se$\text{}_{2-x}$ Probed by Cryogenic STM/STS

Autorzy:

Hasegawa, T.
Shiino, O.
Yamaguchi, W.
Endo, T.
Sugawara, H.
Kitazawa, K.

Powiązania:

https://bibliotekanauki.pl/articles/1968713.pdf

Data publikacji:

1998-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

71.30.+h
71.20.-b

Opis:

A metal-insulator transition, Mott transition, in layered materials 1T-TaS$\text{}_{x}$Se$\text{}_{2-x}$ was investigated by cryogenic scanning tunneling microscopy/ spectroscopy. At 77 K, tunneling spectra in the insulating phase showed a conduction band with almost half filling, which becomes narrower as x decreases. Around the transition point x≈1.4 at 77 K, we observed a sign of gap opening without an overshooting peak at zero bias, supporting the Mott localization picture in which a carrier number vanishes at the transition point. From the site-specified scanning tunneling spectroscopy measurements, furthermore, electrons were found to localize at the charge density wave crest positions. In 1T-TaS$\text{}_{2}$, we have also found that both metallic and insulating phases coexist in a nanometer scale just above the transition temperature, 180 K. >From the minimum size of the insulating region, the coherence length of Mott insulating state was evaluated to be≈5 nm.

Źródło:

Acta Physica Polonica A; 1998, 93, 2; 297-305
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 49.

Tytuł:

Synthesis and Electrical Properties of La-Pr-Mn-O Thin Films and Heterostructures

Autorzy:

Butkutė, R.
Anisimovas, F.
Oginskis, A. K.
Steikūnienė, A.
Devenson, J.
Vengalis, B.

Powiązania:

https://bibliotekanauki.pl/articles/2047223.pdf

Data publikacji:

2007-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

75.70.-i
71.30.+h
73.50.-h
75.70.Pa

Opis:

In this paper we report the results of synthesis and study of both ceramic samples and thin films of electronically doped La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$ and related heterostructures composed of La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$ and p-type La$\text{}_{0.67}$Ca$\text{}_{0.33}$MnO$\text{}_{3}$. The ceramic La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$ samples were prepared by a conventional solid state reaction technique. Single phase La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$ thin films and La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$/La$\text{}_{0.67}$ Ca$\text{}_{0.33}$MnO$\text{}_{3}$ heterostructures were grown on lattice-matched perovskite NdGaO$\text{}_{3}$ substrates by pulsed laser deposition. Electron doping was indicated both for ceramic La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$ samples and thin films from thermopower data. Both ceramic samples and thin films of La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$ demonstrated resistivity of about 10 mΩ cm at 300 K and semiconductor-like resistance vs. temperature behavior with cooling down to 78 K. Meanwhile, the resistance of the La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$/La$\text{}_{0.67}$Ca$\text{}_{0.33}$MnO$\text{}_{3}$ interface showed an anomalous peak at 185 K. A series of post-deposition annealing experiments demonstrated a crucial role of annealing temperature and ambience on both electrical and magnetic properties of La$\text{}_{0.7}$Pr$\text{}_{0.3}$MnO$\text{}_{3}$ material and the heterostructures.

Źródło:

Acta Physica Polonica A; 2007, 111, 1; 111-115
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 50.

Tytuł:

Quantitative Analysis of Cryomilled Nanocrystalline Ti-6Al-4V Alloy Powder by X-Ray Diffraction

Autorzy:

Oh, M.
Yu, H. K.
Lee, J.-H.
Oh, M. C.
Jung, S.-H.
Ahn, B.

Powiązania:

https://bibliotekanauki.pl/articles/356265.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

nanocrystalline
cryomilling
Ti alloy
X-ray diffraction
size-strain plot method

Opis:

A nanocrystalline Ti alloy powder was fabricated using cryomilling. The grain size and lattice strain evolution during cryomilling were quantitatively analyzed using X-ray diffraction (XRD) based on the Scherrer equation, Williamson-Hall (W-H) plotting method, and size-strain (S-S) method assuming uniform deformation. Other physical parameters including stress and strain have been calculated. The average crystallite size and the lattice strain evaluated from XRD analysis are in good agreement with the result of transmission electron microscopy (TEM).

Źródło:

Archives of Metallurgy and Materials; 2018, 63, 3; 1439-1442
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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