全文获取类型
收费全文 | 186篇 |
免费 | 13篇 |
学科分类
工业技术 | 199篇 |
出版年
2022年 | 1篇 |
2021年 | 7篇 |
2020年 | 1篇 |
2019年 | 4篇 |
2018年 | 3篇 |
2017年 | 5篇 |
2016年 | 4篇 |
2015年 | 5篇 |
2014年 | 13篇 |
2013年 | 6篇 |
2012年 | 7篇 |
2011年 | 10篇 |
2010年 | 6篇 |
2009年 | 15篇 |
2008年 | 12篇 |
2007年 | 4篇 |
2006年 | 6篇 |
2005年 | 9篇 |
2004年 | 11篇 |
2003年 | 8篇 |
2002年 | 5篇 |
2001年 | 4篇 |
2000年 | 2篇 |
1999年 | 3篇 |
1998年 | 7篇 |
1997年 | 3篇 |
1996年 | 5篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1993年 | 2篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1988年 | 3篇 |
1987年 | 3篇 |
1986年 | 2篇 |
1984年 | 3篇 |
1983年 | 2篇 |
1982年 | 3篇 |
1981年 | 1篇 |
1980年 | 2篇 |
1979年 | 1篇 |
1977年 | 1篇 |
1974年 | 1篇 |
1973年 | 1篇 |
排序方式: 共有199条查询结果,搜索用时 578 毫秒
91.
Rats were fed semipurified diets containing olive oil or partially hydrogenated corn oil at the 5 or 20% level for ca. 30
days. These fat diets contained the same amount of octadecenoate but differed in the geometry with respect to each fat level.
Contents oft-18∶1 were 26% and 41% of total fatty acids, respectively. The linoleic acid content was also made equivalent (3.8 energy
%). After feeding on cholesterol-free diets, rats ontrans fat, compared to those oncis fat, showed: (a) no changes in serum cholesterol and apolipoprotein levels, (b) no effects on the bile flow and concentrations
of biliary cholesterol or bile acids, (c) a trend toward increased fecal excretion of neutral and acidic steroids, (d) a lesser
extent of transformation of cholesterol to coprostanol in the gut, and (e) no changes in the composition of biliary and fecal
bile acids. Observations (c) and (d) were more marked with a hightrans fat regimen. These observations, except for serum apolipoproteins and fecal steroid excretion, were practically reproducible
even when rats were fed cholesterol-enriched diets.
A preliminary part of this study was presented at the 74th annual AOCS meeting, Chicago, 1983. 相似文献
92.
93.
Masami Morooka Midori Morooka 《Journal of Materials Science: Materials in Electronics》2013,24(10):3776-3781
The conditions for the generation of nano-sized Au agglomerates in Si, which were recently discovered by the author, have been investigated. The agglomerates can be generated under very limited conditions. The agglomerates are generated with a continuous annealing method but are not generated with a typical ordinary annealing method. They are generated at an annealing temperature of 900 °C but not at 930 °C. Agglomerates are not generated in regions less than 6 μm from the surface. They are generated in a sample that is initially supersaturated with Au atoms at 7.5 × 1016 cm?3 but are only generated at the boundary of the out-diffusion in a sample that initially contains Au atoms at 2.5 × 1016 cm?3. Generation of the agglomerates becomes difficult as the time to cool to the annealing temperature increases in the continuous annealing process. The generated agglomerates dissolve and disappear as the surrounding Au concentration decreases to the thermal equilibrium value, that is, as the sample recovers from the supersaturation of the surrounding Au. 相似文献
94.
Ning LiYoshio Abe Midori KawamuraKyung Ho Kim Tsutomu Suzuki 《Thin solid films》2012,520(16):5137-5140
Hydrated ZrO2 thin films were prepared by reactive sputtering in O2, H2O, and H2O + H2O2 mixed gas, and the effect of the sputtering atmosphere on ion conductivity of the films was investigated. The results showed that the films deposited in O2 gas exhibited poor ion conductivity; however, the ion conductivities of the films deposited in the other two kinds of atmosphere were similar and 300-500 times higher than that of the films deposited in O2 gas. It was indicated that the higher ion conductivity of the films was caused by lower film density and higher water content. 相似文献
95.
We prepared Ag thin films on SiO2/Si substrates, with and without a subnanometer-thick organic interface layer of 3-mercaptopropyltrimethoxysilane (MPTMS). The surface morphology and electrical resistivity of these films were investigated and compared. Ag films grown with an MPTMS layer were relatively flat, resulting in a smaller critical thickness. This was probably because migration of Ag atoms on the substrate was suppressed by interactions between the Ag atoms and the thiol moiety. The deposition rate and terminating group of the organic interface layer also influenced the Ag film growth. 相似文献
96.
Chie Yoneda Kumiko Okubo Midori Kasai Keiko Hatae 《Journal of the science of food and agriculture》2005,85(5):809-816
The extractive components of raw and boiled–dried scallop adductor muscle were examined. On a dry weight basis the levels of total free amino acids, total adenosine triphosphate (ATP) and related compounds, and betaines in the boiled–dried sample were lower than those in the raw muscle, which may have been due to the outflow of these compounds during boiling. Soup prepared from the boiled–dried scallop and chicken leg meat was assessed by sensory evaluation. This soup cooked with the scallop and chicken was stronger in sweetness, umami and body and rated higher in overall preference than the soup containing these ingredients after cooking separately. The inosine monophosphate (IMP) level in the former soup was 4.4 times higher than that in the latter. The adenosine monophosphate (AMP) deaminase (EC 3.5.4.6) activity in the crude extract from the chicken meat was 9.16 units l?1, whereas no activity could be detected in the crude extract from the boiled–dried scallop. It is concluded that AMP, which was mainly derived from the boiled–dried scallop, was converted to IMP by AMP deaminase from the chicken meat during the preparation of the soup, resulting in an improvement in the taste. Copyright © 2004 Society of Chemical Industry 相似文献
97.
Additional effect of Ag and 211 phase on thermal expansion of REBaCuO bulk superconductor (RE=Sm, Y)
The anisotropic thermal expansion ΔL/L was examined for melt-processed REBaCuO(Ag) bulk composites (RE=Sm, Y) as functions of not only the contents of the RE2BaCuO5 second phase but also Ag metal added to the highly oriented REBa2Cu3O7 matrix. The ΔL/L|c values in the c-direction of REBaCuO(Ag) bulks are about 1.5-1.8 times as large as the ΔL/L|ab values in the ab-plane. ΔL/L increases with increasing Ag content in both directions but ΔL/L|c is by far more sensitive to the Ag content. The resultant compressive strain due to Ag particles in the c-direction through the melt-processing was estimated and its possible contribution for the improvement of the superconducting characteristics of the matrix was discussed. 相似文献
98.
R Takaki T Nishiyama M Sekiya S Ishizawa A Junicho Y Fujishiro Y Yabuzaki 《Canadian Metallurgical Quarterly》1997,4(1):97-98
This paper delineates in short the way in which epidemiology and obstetrics and gynaecology could profit from each other's expertise and why. Epidemiology addresses the rates of occurrence in illnesses and their outcomes in relation to potential determinants of these in any realm of medicine. Obstetrics and gynaecology concern themselves with the female reproductive system, notably. Epidemiologic methods are essential to valid research, and obstetrics and gynaecology are essential to valid inference of epidemiologic research. 相似文献
99.
Masanobu Awano Yoshinobu Fujishiro Koichi Hamamoto Shingo Katayama Sergei Bredikhin 《International Journal of Applied Ceramic Technology》2004,1(3):277-286
Dramatic improvements in the selective separation and purification of NOx in exhaust gases by an electrochemical reactor have been achieved. The novel electrochemical cells for NOx decomposition were developed by nano-scale control of penetrating pores from the catalytic electrode surface to the bottom of the catalytic electrode layer, and by distribution at the interfaces of ionic and electronically conducting grains through the electro-catalytic electrode of the cells. Dramatic improvement in the current efficiency and suppression of the working voltage of the cells enabled their application as a novel reactor for NOx decomposition of gases from gasoline- and diesel-engine vehicles, gas engines, and other industrial equipment with the advantage of less energy consumption in comparison to "the fuel penalty" for presently used catalytic systems. The cells are able to work as a deNOx reactor even under excess oxygen contents up to 10% because of the selective separation to NOx molecules by the nano-space reaction. For the first time such nano-reaction has been shown to realize sufficiently applicable yielding rates. Enlarged cells revealed high performance similar to the small experimental cells. 相似文献
100.
Manabu Ikebe Hiroyuki Fujishiro Kiminari Nakasato 《Journal of Low Temperature Physics》1997,107(5-6):467-472
The characteristic enhancement in the heat conduction below Tc is analyzed on sintered YBa2Cu3O7 from viewpoints of both d-wave and s-wave coupling. Assuming the existence of a large energy gap Δ0(≥1.5Δ
BCS
), only d-wave coupling is consistent with experimental observation. It is found that the most reasonable explanation for
the enhancement is provided by the weak-coupling phonon conduction model under d-wave energy gap. 相似文献