Temat: GA - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Microstructure evaluation of Ni-Mn-Ga alloy
Mikrostruktura stopu Ni-Mn-Ga
Autorzy:: Flaga, S.
Kata, D.
Sapiński, B.
Tematy:: MSMA
stop Ni-Mn-Ga
Ni-Mn-Ga alloy; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:: https://bibliotekanauki.pl/articles/368870.pdf Link otwiera się w nowym oknie
Opis:: This paper summarises the applications of MSMA materials, outlines the mechanism of magnetic shape memory effect and provides the procedure for microstructure evaluation of samples as well as the results of microstructure analysis using the example of the Ni-Mn-Ga alloy.
W artykule scharakteryzowano zastosowania materiałów z magnetyczną pamięcią kształtu (MSMA). Opisano mechanizm działania magnetycznej pamięci kształtu. Przedstawiono procedurę mikroskopowej oceny próbki i jej wyniki na przykładzie stopu Ni-Mn-Ga.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Microstructure of V3Ga superconducting wire using high Ga content Ti-Ga/V precursor composite material
Mikrostruktura nadprzewodzącego drutu V3Ga wytworzonego przy użyciu związku TiGa3 o wysokiej zawartości Ga
Autorzy:: Murakami, S.
Matsuda, K.
Kawabata, T.
Hishinuma, Y
Ikeno, S.
Tematy:: superconductor
Ti-Ga/V precursor composite material
V-Ga phase
TEM
microstructure
drut nadprzewodzący
Ti-Ga/V materiał kompozytowy
faza V-Ga
mikrostruktura; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/355932.pdf Link otwiera się w nowym oknie
Opis:: Our co-workers, Hishinuma et. al. have fabricated the V3Ga compound wire by a new process using a high Ga content Ti-Ga compound in order to improve the superconducting property of the wire. In this study, we investigated microstructures of this wire to clarify the existence of V3Ga phase. The different contrasts of the matrix, two V-Ga phases and Ti-Ga core were observed by SEM observation. Two V-Ga phases were also confirmed. The ratio of V to Ga for two V-Ga phases was respectively 3:1 and 6:5 according to the EDS result. And these two phases were confirmed as V3Ga and V6Ga5.
Hishinuma i współpracownicy wytworzyli drut związku międzymetalicznego V3Ga przy użyciu nowej metody wykorzystującej związek międzymetaliczny Ti-Ga o wysokiej zawartości Ga celem poprawy właściwości nadprzewodzących drutu. Zbadaliśmy mikrostrukturę drutu, aby zweryfikować obecność fazy V3Ga. W trakcie badań SEM zaobserwowano zróżnicowany kontrast w osnowie oraz istnienie dwóch faz V-Ga i rdzenia T-Ga. Analiza EDS potwierdziła istnienie dwóch faz z układu V-Ga, w których stosunek V do Ga wynosi odpowiednio 3:1 i 6:5. Potwierdzono, ze te dwie fazy to V3Ga i V6Ga5.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Historia japońskich wizerunków erotycznych od starożytności do epoki Meiji (1868–1912).
The history of Japanese erotic images – from the ancient times to the Meiji period (1868–1912)
Autorzy:: Matusiak, Gabriela
Opis:: Wizerunki erotyczne powstawały w Japonii już od czasów starożytnych w postaci kamiennych symboli kultów płodności. W kolejnych epokach zdominowanych przez buddyzm piętnujący pożądliwość rolę obrazów erotycznych pełniły ilustracje do traktatów medycznych. Na przełomie epok Heian i Kamakura pojawiły się pierwsze udokumentowane ilustrowane zwoje o tematyce seksualnej, które sporadycznie tworzono aż do końca XIX w. W epoce Kamakura chętnie podejmowano motyw miłości homoseksualnej między mężczyznami. W epoce Edo, mimo cenzury, obrazy erotyczne były najbardziej rozpowszechnione w postaci licznych drzeworytów ukiyo-e i zwojów w stylu ukiyo zwanych nikuhitsu shunga. W epoce Meiji częściowo kontynuowano produkcję drzeworytów erotycznych inspirując się motywami modernizacji, jednak w niedługim czasie tego typu twórczość zanikła. Autorka w swojej pracy przedstawia historię wizerunków erotycznych ujętych przez pryzmat japońskich epok i kultury. Po kolei omawia poszczególne rodzaje wizerunków, które powstawały w poszczególnych okresach, ich przeznaczenie oraz podaje najbardziej reprezentatywne przykłady.
Erotic images had been created in Japan since the ancient times as stone symbols of fertility. In the following periods, which had been dominated by Buddhism, pictures with a sexual content were attached to medical tracts. According to records, at the turn of the Heian and Kamakura periods, first erotic illustrated handscrolls had been formed. In a similar way they had been created until nineteenth century. Incidentally, a theme of homosexual intercourse between men was popular in Kamakura period. In spite of censorship, in Edo period sexually explicit handscroll paintings called nikuhitsu shunga and erotic woodblock prints called ukiyo-e were very popular. In Meiji period, a tradition of erotic woodblock printing had been narrowly continued, yet such kind of art disappeared very soon. In this thesis I examine different kinds of erotic images depicted in particular periods of Japan history. I explain a purpose why they had been created and I describe the most representative examples of such images.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Inne

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Skocz do pozycji: 4.

Tytuł:: Development of a radiolabeled glucagon compound for imaging
Autorzy:: Jalilian, A. R.
Jouiaei, M.
Doroudi, A. R.
Bolourinovin, F.
Garousi, J.
Tematy:: glucagons
radiolabeling
biodistribution
Ga-67; Pokaż więcej
Wydawca:: Instytut Chemii i Techniki Jądrowej
Powiązania:: https://bibliotekanauki.pl/articles/148402.pdf Link otwiera się w nowym oknie
Opis:: In order to develop a possible Ga-labeled glucagon (GCG) compound for imaging studies, biosynthetic glucagon (GCG) was labeled with [67Ga]-gallium chloride after conjugation with freshly prepared diethylenetriaminepentaacetic acid dianhydride (ccDTPA). After solid phase purification of the radiolabeled hormone, high performance liquid chromatography (HPLC) and instant thin-layer chromatography (ITLC) showed a radiochemical purity around 95 per cent in optimized conditions (specific activity = 296–370 GBq/mM; labeling efficiency 85 per cent). Preliminary in vivo studies (IDźg–1 per cent) in male wild-type rats showed heart:muscle, liver:muscle, lung:muscle and stomach:muscle ratios to be 5.53, 2.9, 7.56, 3.69, 3.2 (in 5 min), respectively while after 2 h liver:blood, lung:blood and spleen:blood ratios were 14.21, 16.86 and 7.8, respectively. The data suggests 5 min post injection, the tracer is accumulated in GCGR rich tissues which is in agreement with biodistribution studies and reported GCG receptors (GCGRs). The results of the present study can possibly offer a candidate for non-invasive imaging of glucagon receptor related diseased and malignancies such as glucagonoma.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Potential value of pre- and post-therapy [68Ga]Ga-DOTA-TATE PET/CT in the prognosis of response to PRRT in disseminated neuroendocrine tumors
Autorzy:: Al Maraih, Ibraheem
Morawiec-Sławek, Karolina
Hubalewska-Dydejczyk, Alicja
Kania-Kuc, Adrian
Opalińska, Marta
Sowa-Staszczak, Anna
Opis:: Background: Peptide receptor radionuclide therapy (PRRT) is one of the most effective therapeutic options for the treatment of metastatic, well-differentiated neuroendocrine tumors (NETs). It improves progressive disease-free survival and enables the control of hormone secretion in functioning tumors. Currently, there are no clearly established predictors of response to PRRT. The main factors hindering such a prediction are the heterogeneity of somatostatin receptor expression within and between lesions, lack of standardized parameters for functional imaging, and the use of different PRRT protocols. The main goal of our study was to quantify SUVmax changes in [68Ga]Ga-DOTA-TATE PET/CT scans as a potential predictor of long-term response to PRRT. Material and methods: Out of 20 patients treated with PRRT using [177Lu]Lu and/or [177Lu]Lu/[90Y]Y-DOTA-TATE in 2017–2019 due to dissemination of neuroendocrine neoplasm, 12 patients underwent [68Ga]Ga-DOTA-TATE PET/CT on average 3.1 months before and 4.5 months after PRRT and were eligible for the analysis. In total, 76 NET lesions were evaluated. We measured SUVmax for every lesion in both PET/CT scans (before and after PRRT). Those values were corrected by liver SUVmax and liver SUVmean measured in volumetric analysis and specified as SUVlmax and SUVlmean. As a next step, changes in SUVlmax and SUVlmean were assessed based on both PET/CT scans. Finally, results were correlated with the clinical outcome assessed as progressive disease, disease stabilization, or partial response. Results: The mean follow-up period was 19.9 months. Progressive disease, partial response, and disease stabilization were found in five, two, and five patients, respectively. Among patients with a partial response, the decrease in mean SUVlmax was 66.3% when compared to baseline. In patients with stable disease, the decrease in SUVlmax was 30.3% when compared to baseline. In patients with progressive disease, the mean increase in SUVlmax was 9.1% when compared to baseline. The changes in SUVlmean were -69,8%, -30.8%, and -3.7%, respectively. Conclusions: A decrease in the SUVmax value in NET lesions, corrected by normal liver tissue uptake assessed in [68Ga]Ga-DOTA-TATE PET/CT scans, indicates a lower risk for NET progressive disease within 20 months after PRRT and may constitute an additional and independent parameter for the estimation of overall risk for disease progression.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 6.

Tytuł:: Mössbauer study of vacuum annealed Fe100-xGax (10 less - than or equal to x less - than or equal to 35) thin films
Autorzy:: Szumiata, T.
Górka, B.
Brzózka, K.
Gawroński, M.
Gzik-Szumiata, M.
Javed, A.
Morley, N. A.
Gibbs, M. R. J.
Tematy:: Fe-Ga
thin films
CEMS
MOKE; Pokaż więcej
Wydawca:: Instytut Chemii i Techniki Jądrowej
Powiązania:: https://bibliotekanauki.pl/articles/147332.pdf Link otwiera się w nowym oknie
Opis:: This work reports results from comparative Mossbauer studies of as-deposited and annealed Fe100.xGax (10 less - than or equal to x less - than or equal to 35) high magnetostrictive thin films of constant thickness (50 plus or minus 2 nm). Films were grown on Si(100) substrates using a co-sputtering and evaporation chamber where Fe has been sputtered and Ga was evaporated. During growth of films, a magnetic field of 65 kA/m has been applied in the plane of the film. Annealed films have been obtained by heating in vacuum for 1 h at 350 centigrade without magnetic field. After annealing, the saturation field of the Fe-Ga films has been significantly reduced. By means of the 57Fe CEMS technique the contributions from several phases have been found: Fe-Ga A2 (bcc), traces of DO3 phase, a gallium-rich disordered phase and iron oxides (both geothite and magnetite). For the sample with x = 26.5 the heat treatment reduces the DO3 phase content whereas for the film with x = 16.4 the opposite tendency has been observed. Mossbauer results were compared with XRD and MOKE findings.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Optical and electrical properties of highly doped ZnO:Al films deposited by atomic layer deposition on Si substrates in visible and near infrared region
Autorzy:: Romanyuk, V.
Dmitruk, N.
Karpyna, V.
Lashkarev, G.
Popovych, V.
Dranchuk, M.
Pietruszka, R.
Godlewski, M.
Dovbeshko, G.
Timofeeva, I.
Kondratenko, O.
Taborska,, M.
Ievtushenko, A.
Tematy:: 78.66.Hf
73.61.Ga; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1156366.pdf Link otwiera się w nowym oknie
Opis:: Optical properties of ZnO films doped by Al in the range 0.5 to 7 at.% and deposited by atomic layer deposition were studied in visible and infrared spectral range. Spectral dependences of film optical permittivity were modeled with the Lorentz-Drude approximation resulting in ZnO:Al plasma frequency and plasma damping parameters. We observed changing electron effective mass from 0.29m₀ to 0.5m₀ with increasing electron concentration in the range (0.9-4) × 10²⁰ due to the phenomenon of conduction band non-parabolicity. Comparing the results of optical and electrical investigations we can see that the main scattering mechanism is the scattering on grain boundaries (its contribution is about 60%).
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Low Temperature Anomalies in the Specific Heat and Magnetic Susceptibility of $Na_{0.7}CoO_2$ Samples
Autorzy:: Baran, A.
Zorkovská, A.
Feher, A.
Šebek, J.
Šantavá, E.
Hejtmánek, J.
Veverka, M.
Bradarić, I.
Ružička, M.
Tematy:: 75.40.Cx
72.80.Ga; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1813849.pdf Link otwiera się w nowym oknie
Opis:: We present a comparative study of $Na_{0.7}CoO_2$ samples obtained from three different sources and prepared by different methods. The specific heat and magnetic susceptibility measurements in the temperature range 2-300 K show substantial influence on the observed anomalies, which underlines that the system is extremely sensitive to preparation protocols.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 9.

Tytuł:: Structural and Optical Studies of CdTe/ZnTe Superlattices with Ultrathin ZnTe Layers
Autorzy:: Mariette, H.
Jouneau, P. H
Pelekanos, N. T.
Tardot, A.
Feuilet, G.
Magnea, N.
Tematy:: 78.66.Hf
73.61.Ga; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1929608.pdf Link otwiera się w nowym oknie
Opis:: Spatially selective introduction of ultrathin ZnTe layers (1 to 3 mono-layers) into CdTe allows the study of special superlattice structure, corresponding to a monomolecular plane-host crystal system. Particular attention is given to the strain state control of the inserted ZnTe monolayer. High resolution electron microscopy is used to measure the local lattice distortion: the method yields the location and the total amount of Zn per period, and the results are compared with X-ray diffraction data. Optical properties of these superlattices are also presented. All results show the ability to control ultrathin pseudomorphic layers of ZnTc within CdTe, with limited Zn segregation, and of high crystalline and optical quality. In addition, they can be fitted within the framework of elasticity theory for the structural data, and of a finite quantum well model for the optical ones, even in the ultimate limit of only one nominal ZnTe monolayer.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Quasiparticles in Calcium Doped Yttrium-Iron Garnets
Autorzy:: Lehmann-Szweykowska, A.
Wojciechowski, R. J.
Gehring, G. A.
Tobijaszewski, I.
Tematy:: 72.20.Jv
72.80.Ga; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1955836.pdf Link otwiera się w nowym oknie
Opis:: In yttrium-iron garnets an electrical charge is carried by quasiparticles based on compensating holes which move either at oxygen or iron ions of the tetragonal sublattice. The quasiparticles can also get localized because of their coupling to optical phonons on the iron sites. A multi-band model of holes coupled to phonons is applied to find additional energy levels in the gap between the lower of the narrow 3d bands and the wide 2p band, whose occurrence plays a crucial role in a conductivity mechanism. The density of states is considerably modified by the interaction between the holes and local distortion of the lattice.
Dostawca treści:: Biblioteka Nauki

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