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141.
142.
Marwan Dhamrin Koichi Kamisako Tadashi Saitoh Takeshi Eguchi Teruhiko Hirasawa Isao Yamaga 《Progress in Photovoltaics: Research and Applications》2005,13(7):597-606
High‐quality Ga‐doped ingots are grown in different casting furnaces at optimized growth parameters; 3·5 kg ingots exhibit normal distribution of diffusion lengths along their height with very high diffusion lengths at the center of the ingot. Effective lifetimes as high as 1·1 ms are realized in 10 Ω cm Ga‐doped wafers after proper P‐diffusion and hydrogen passivation. Average effective lifetimes above 400 µs are also realized after P‐diffusion and hydrogen passivation for Ga‐doped wafers cut from 75 kg ingot where the response to P‐diffusion and hydrogen passivation is pronounced. High effective lifetimes are realized over the whole ingot with minimum values of 20 µs at the top of the ingot, indicating the possible use of about 85% of the ingot for solar cell production. Conversion efficiencies above 15·5% were realized in utilizing more than 80% of the ingot. High efficiencies of about 16% were realized in wafers with resistivities higher than 5 Ω cm p ‐type multicrystalline silicon wafers. Copyright © 2005 John Wiley & Sons, Ltd. 相似文献
143.
Yong-Jin Pu Masashi Miyamoto Ken-ichi Nakayama Toshiro Oyama Yokoyama Masaaki Junji Kido 《Organic Electronics》2009,10(2):228-232
We synthesized π-conjugated lithium phenolate complexes, lithium 2-(2-pyridyl)phenolate (LiPP), lithium 2-(2′, 2′′-bipyridine-6′-yl)phenolate (LiBPP), and lithium 2-(isoquinoline-1′-yl)phenolate (LiIQP). These complexes showed lower sublimation temperatures of 305–332 °C compared to 717 °C of LiF. The organic light-emitting devices (OLEDs) using these complexes as an electron injection layer exhibited high efficiencies which are comparable to that of the device using LiF. Especially, a 40-nm thick film of LiBPP or LiPP was effective as an electron injection material, providing low driving voltages, while such a thick film of LiF serves as a complete insulator, resulting in high driving voltages. 相似文献
144.
Serial siphon valving for centrifugal microfluidic platforms 总被引:2,自引:2,他引:0
Jonathan Siegrist Robert Gorkin Liviu Clime Emmanuel Roy Régis Peytavi Horacio Kido Michel Bergeron Teodor Veres Marc Madou 《Microfluidics and nanofluidics》2010,9(1):55-63
Today, the focus in microfluidic platforms for diagnostics is on the integration of several analysis steps toward sample-to-answer
systems. One of the main challenges to integration is the requirement for serial valving to allow the sequential release of
fluids in a temporally and spatially controlled manner. The advantages offered by centrifugal microfluidic platforms make
them excellent candidates for integration of biological analysis steps, yet they are limited by the lack of robust serial
valving technologies. This is especially true for the majority of centrifugal microfluidic devices that rely on hydrophilic
surfaces, where few passive serial valving techniques function reliably. Building on the useful functionality of centrifugal
microfluidic siphoning previously shown, a novel serial siphon valve is introduced that relies on multiple, inline siphons
to provide for a better controlled, sequential release of fluids. The introduction of this novel concept is followed by an
analytical analysis of the device. Proof-of-concept is also demonstrated, and examples are provided to illustrate the range
of functionality of the serial siphon valve. The serial siphon is shown to be robust and reproducible, with variability caused
by the dependence on contact angle, rotation velocity, and fluidic properties (viz., surface tension) significantly reduced
compared to current microfluidic, centrifugal serial valving technologies. 相似文献
145.
Jun-ichi Tani Masanari Takahashi Hiroyasu Kido 《Journal of the European Ceramic Society》2010,30(6):1483-1488
ZrW2O8/Zr2WP2O12 composites were fabricated by sintering ZrW2O8–Zr2WP2O12 powder mixtures at 1473 K for 1 h, and their negative thermal expansion properties were investigated. The relative density of sintered pure-phase ZrW2O8 was 72.3%, while that of the sintered composites was 88.4–92.3%. In the composites, the observed hysteresis in the thermal expansion data was small because of the small difference between the CTEs of ZrW2O8 and Zr2WP2O12. The CTE of the composites was negative and increased with the Zr2WP2O12 content. When the Zr2WP2O12 volume fraction in the composites was increased from 0 to 75 vol%, the CTEs of the composites increased from ?9.1 × 10?6 to ?3.1 × 10?6 K?1 and from ?5.0 × 10?6 to ?1.9 × 10?6 K?1 over the temperature ranges of 323–373 and 473–673 K, respectively. In composites with Zr2WP2O12 volume fractions of 0–25 vol%, the experimentally obtained CTE values were in good agreement with the calculated values obtained by assuming mixed law behavior. 相似文献
146.
Akito Oizumi Hiroshi Akie Nobuyuki Iwamoto Teruhiko Kugo 《Journal of Nuclear Science and Technology》2013,50(1):77-90
The present paper aims to contribute from a neutronic aspect to activities for new cladding material development for light water reactors (LWRs) that can reduce the risk of hydrogen gas explosion. Iron (Fe), nickel (Ni), titanium (Ti), niobium (Nb) and vanadium (V) are selected as possible component elements to cover a variety of new cladding materials for LWRs. The effect of larger thermal absorption cross sections of these elements than those of zirconium (Zr), together with those of silicon carbide (SiC), on the neutron economy in LWRs is evaluated by performing pin cell burnup calculations for a conventional pressurized water reactor (PWR), a low-moderation high-burnup LWR (LM-LWR) and a high-moderation high-burnup LWR (HM-LWR). As can be anticipated from the thermal cross sections, SiC has excellent neutron economy. The materials other than SiC largely decrease discharge burnup for all three types of LWRs in comparison with Zircaloy-4. Among such elements of larger thermal absorption cross section, Nb has neutron economical advantage over the other materials except SiC in softer neutron spectrum reactors such as HM-LWR in which the atomic number ratio of hydrogen to heavy metal is 6. In conventional LWRs, stainless steel of low Ni contents has the neutron economic advantage as well as Nb for cladding material. The results of the calculations are summarized for the purpose to provide reference data for new cladding material development studies, in terms of the relation between fuel enrichment and cladding thickness from the viewpoint to achieve the same discharge burnup as the Zircaloy cladding. 相似文献
147.
Kenji Yokoyama Makoto Ishikawa Teruhiko Kugo 《Journal of Nuclear Science and Technology》2013,50(12):1165-1174
An extended cross-section adjustment method has been developed to improve the prediction accuracy of target core parameters. The present method is on the basis of a cross-section adjustment method which minimizes the uncertainties of target core parameters under the conditions that integral experimental data are given. The present method enables us to enhance the prediction accuracy better than the conventional cross-section adjustment method by taking into account the target core parameters, as well as the extended bias factor method. In addition, it is proved that the present method is equivalent to the extended bias factor method when only one target core parameter is taken into account. The present method is implemented in an existing cross-section adjustment solver. Numerical calculations verify the derived formulation and demonstrate an applicability of an adjusted cross-section set which is specialized for the target core parameters. 相似文献
148.
Hasegawa T Hayashi M Nomura K Hayashi M Kido M Ohmori T Fukuda M Iguchi A Ueno S Shigematsu T Hirayama M Fujii T 《Journal of Bioscience and Bioengineering》2012,113(6):788-791
Using microplates as pressure and cultivation vessels, a high-throughput method was developed for analyzing the high-pressure inactivation kinetics of microorganisms. The loss of viability from a high-pressure treatment, measured based on the growth delay during microplate cultivation, showed reproducibility with the conventional agar plate method and was applicable for the kinetics analysis. 相似文献
149.
Arisa Ueki Kokichi Sugano Kumiko Misu Eriko Aimono Kohei Nakamura Shigeki Tanishima Nobuyuki Tanaka Shuji Mikami Akira Hirasawa Miho Ando Teruhiko Yoshida Mototsugu Oya Hiroshi Nishihara Kenjiro Kosaki 《International journal of molecular sciences》2021,22(15)
Hereditary leiomyomatosis and renal cell carcinoma (HL (RCC)) entails cutaneous and uterine leiomyomatosis with aggressive type 2 papillary RCC-like histology. HLRCC is caused by pathogenic variants in the FH gene, which encodes fumarate hydratase (FH). Here, we describe an episode of young-onset RCC caused by a genomic FH deletion that was diagnosed via clinical sequencing. A 35-year-old woman was diagnosed with RCC and multiple metastases: histopathological analyses supported a diagnosis of FH-deficient RCC. Although the patient had neither skin tumors nor a family history of HLRCC, an aggressive clinical course at her age and pathological diagnosis of FH-deficient RCC suggested a germline FH variant. After counseling, the patient provided written informed consent for germline genetic testing. She was simultaneously subjected to paired tumor profiling tests targeting the exome to identify a therapeutic target. Although conventional germline sequencing did not detect FH variants, exome sequencing revealed a heterozygous germline FH deletion. As such, paired tumor profiling, not conventional sequencing, was required to identify this genetic deletion. RCC caused by a germline FH deletion has hitherto not been described in Japan, and the FH deletion detected in this patient was presumed to be of maternal European origin. Although the genotype-phenotype correlation in HLRCC-related tumors is unclear, the patient’s family was advised to undergo genetic counseling to consider additional RCC screening. 相似文献
150.
Various metal triflates were employed for direct polycondensation of lactic acid to afford poly(lactic acid). Screening of the metal triflates was conducted with the polycondensation of lactic acid at 160–180 °C for 16 h under reduced pressure (1.4 kPa) after a pre-dehydration process under an air atmosphere. Examined metal triflates are scandium, yttrium, ytterbium, lanthanum, hafnium, copper, and silver triflates. Polycondensation using scandium triflate afforded poly(lactic acid) with high molecular weights (M n = 4.3 × 104) in a good yields (62%) under the following conditions; catalyst amount = 0.05 mol%, pre-dehydration at 180 °C for 2 h, and polycondensation at 180 °C for 16 h. Active metal triflates coordinated with lactic acid strongly, confirmed by 1H NMR and FT-IR spectroscopy. 相似文献