全文获取类型
收费全文 | 112篇 |
免费 | 5篇 |
国内免费 | 1篇 |
专业分类
化学工业 | 36篇 |
金属工艺 | 3篇 |
机械仪表 | 4篇 |
矿业工程 | 1篇 |
轻工业 | 12篇 |
水利工程 | 1篇 |
石油天然气 | 2篇 |
无线电 | 20篇 |
一般工业技术 | 22篇 |
冶金工业 | 12篇 |
原子能技术 | 1篇 |
自动化技术 | 4篇 |
出版年
2024年 | 1篇 |
2022年 | 3篇 |
2021年 | 6篇 |
2020年 | 4篇 |
2019年 | 6篇 |
2018年 | 3篇 |
2017年 | 10篇 |
2016年 | 3篇 |
2015年 | 4篇 |
2014年 | 2篇 |
2013年 | 4篇 |
2012年 | 3篇 |
2011年 | 11篇 |
2010年 | 5篇 |
2009年 | 3篇 |
2008年 | 3篇 |
2007年 | 3篇 |
2006年 | 3篇 |
2005年 | 3篇 |
2004年 | 1篇 |
2003年 | 3篇 |
2002年 | 1篇 |
1998年 | 3篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1994年 | 1篇 |
1993年 | 3篇 |
1992年 | 1篇 |
1990年 | 1篇 |
1987年 | 2篇 |
1986年 | 2篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1979年 | 3篇 |
1976年 | 2篇 |
1974年 | 2篇 |
1973年 | 2篇 |
1972年 | 2篇 |
1971年 | 3篇 |
1961年 | 1篇 |
排序方式: 共有118条查询结果,搜索用时 15 毫秒
41.
Donka Angelova Angel Dishliev Ivailo Vasilev Lillya Slavtcheva 《International Journal of Fracture》1994,66(3):241-254
Aluminium specimens with pre-caused cracks with different tip radii are tensile tested at two temperatures. The cracks are differently oriented to the tensile axis. The results have undergone statistical processing integrated with fundamental fracture approach. Analytical model to prognosticate the defect metal reliability and the reliability of a randomly chosen detail from a defined set in the range of applied tensile stresses is found. A method for evaluation of the cracks tip radii and cracks orientation effect on fracture is suggested. The introduced strength spaces present a principal strength history of defect metal in interval load imposing-fracture at different temperatures. 相似文献
42.
Vuyelwa Ncapayi Neethu Ninan Thabang C. Lebepe Sundararajan Parani Aswathy Ravindran Girija Richard Bright Krasimir Vasilev Rodney Maluleke Ncediwe Tsolekile Tetsuya Kodama Oluwatobi S. Oluwafemi 《International journal of molecular sciences》2021,22(22)
The link between the microbiome and cancer has led researchers to search for a potential probe for intracellular targeting of bacteria and cancer. Herein, we developed near infrared-emitting ternary AgInSe/ZnS quantum dots (QDs) for dual bacterial and cancer imaging. Briefly, water-soluble AgInSe/ZnS QDs were synthesized in a commercial kitchen pressure cooker. The as-synthesized QDs exhibited a spherical shape with a particle diameter of 4.5 ± 0.5 nm, and they were brightly fluorescent with a photoluminescence maximum at 705 nm. The QDs showed low toxicity against mouse mammary carcinoma (FM3A-Luc), mouse colon carcinoma (C26), malignant fibrous histiocytoma-like (KM-Luc/GFP) and prostate cancer cells, a greater number of accumulations in Staphylococcus aureus, and good cellular uptake in prostate cancer cells. This work is an excellent step towards using ternary QDs for diagnostic and guided therapy for prostate cancer. 相似文献
43.
44.
45.
Rayna Stefanova Stoyan Toshkov Nikola V. Vasilev Nikolay G. Vassilev Ilko N. Marekov 《Food chemistry》2011
The effect of γ-ray irradiation on the fatty acid profile of beef meat was examined at doses of 2.5, 5.0, 7.5, 10.0 and 15.0 kGy by means of 1H NMR spectroscopy. NMR results revealed a clear trend toward an increase in the amount of saturated fatty acids and a decrease in the amount of polyunsaturated fatty acids in the triacylglycerol composition of the irradiated samples compared to the unirradiated sample with increasing the irradiation dose. 相似文献
46.
Targeted delivery and controlled local release of drugs has a number of advantages over conventional systemic drug delivery approaches. Novel platforms for local delivery from solid drug carriers are needed to satisfy the requirements of various medical applications, in particular for the incorporation and release of hydrophilic drugs from a solid carrier material. We have utilized the plasma polymerization of n-heptylamine for the generation of two thin coated layers that serve two distinct purposes. First, an n-heptylamine plasma polymer layer is applied onto the surface of the solid carrier material in order to facilitate spreading of the drug, which is applied by solvent casting; levofloxacin in ethanol was used for this study. A second n-heptylamine plasma polymer coating then serves as a thin barrier coating to control the release. We show that the rate of release can be adjusted via the thickness of the plasma polymer overlayer. We also show that this modality of controlled release of levofloxacin completely inhibits Methicillin-resistant Staphylococcus aureus (MRSA) colonization and biofilm formation on and near the coated biomaterial surface. 相似文献
47.
48.
49.
50.
Paweł Mierczynski Krasimir Vasilev Agnieszka Mierczynska Waldemar Maniukiewicz Tomasz Maniecki 《Topics in Catalysis》2013,56(11):1015-1025
This paper demonstrates the benefit of using spinel (ZnAl2O4) as a support for copper catalysts in hydrogen generation. We have investigated the influence of catalyst pre-treatment, support composition and copper content on the physicochemical and catalytic properties of copper catalysts supported on ZnxAlyOx+1.5y in the methanol steam reforming. The physicochemical properties of the catalysts were examined by X-ray diffraction, temperature-programmed reduction, specific surface area and porosity, X-ray photoelectron spectroscopy, FTIR and chemisorption methods. The reduced copper catalysts showed higher conversion of methanol and higher hydrogen production. We also found that the presence of Cu+ and Cu0 species on the catalyst surface strongly influences the reaction yield and hydrogen production. FTIR measurements performed for copper catalysts confirmed that increasing of aluminium content in the case of catalytic systems caused the growth of adsorbed species on the catalyst surface. 相似文献