全文获取类型
收费全文 | 124篇 |
免费 | 17篇 |
国内免费 | 2篇 |
专业分类
电工技术 | 4篇 |
综合类 | 1篇 |
化学工业 | 41篇 |
金属工艺 | 3篇 |
机械仪表 | 7篇 |
建筑科学 | 2篇 |
能源动力 | 11篇 |
轻工业 | 9篇 |
无线电 | 16篇 |
一般工业技术 | 25篇 |
冶金工业 | 13篇 |
原子能技术 | 1篇 |
自动化技术 | 10篇 |
出版年
2023年 | 1篇 |
2022年 | 4篇 |
2021年 | 17篇 |
2020年 | 16篇 |
2019年 | 7篇 |
2018年 | 9篇 |
2017年 | 7篇 |
2016年 | 6篇 |
2015年 | 9篇 |
2014年 | 7篇 |
2013年 | 11篇 |
2012年 | 5篇 |
2011年 | 3篇 |
2010年 | 3篇 |
2009年 | 3篇 |
2008年 | 4篇 |
2007年 | 3篇 |
2006年 | 5篇 |
2001年 | 2篇 |
2000年 | 2篇 |
1998年 | 4篇 |
1997年 | 3篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1986年 | 1篇 |
1977年 | 1篇 |
1974年 | 1篇 |
排序方式: 共有143条查询结果,搜索用时 62 毫秒
1.
R Bharti 《Canadian Metallurgical Quarterly》1994,66(4):443-448
Fluoroquinolones, a new class of compounds characterised by broad antimicrobial spectrum including mycobacteria together with limited toxicity, have recently been introduced in the chemotherapy of various human infectious diseases. Pefloxacin, one of the members of this class, was recently demonstrated to be bactericidal against M.leprae in the mouse foot-pad model and clinically beneficial in lepromatous leprosy patients. Clinical response to standard MDT with added pefloxacin in ten previously untreated (both PB and MB) was compared with that in ten similar patients on MDT alone in the present trial. The results of chemotherapy were quantified by a method of clinical scoring. This pilot study showed that addition of pefloxacin led to significant and rapid clinical improvement. There were no side effects attributable to pefloxacin. 相似文献
2.
Biswas Uttara Rakshit Jayanta Kumar Das Joyashree Bharti Gaurav Kumar Suthar Bhuvneshwer Amphawan Angela Najjar Monia 《SILICON》2021,13(3):885-892
Silicon - In the present report, a photonic crystal based micro-ring resonator (MRR) structure is proposed which is very compact in size and has very fast response and is employed for temperature... 相似文献
3.
Powder Metallurgy and Metal Ceramics - Powder compaction is the most crucial process in powder metallurgy since almost all the desired properties of a material, such as a shape, size, density,... 相似文献
4.
The use of α, ω‐alkanedisulfonic acid, HO3S(CH2)nSO3H (n = 1, 4, 6 and 12), as a dopant for polyaniline (PANi) was investigated. This series of disulfonic acids with varying chain lengths were synthesized and used in the doping of PANi. The doped polymers showed conductivity in the range 10?2 to 10?1 S cm?1. Thermal studies showed that the doped polymers, depending on the chain length of α,ω‐alkanedisulfonic acid, were stable up to ca 300 °C and the thermal stability decreased with increasing dopant chain length. The thermal stability of α,ω‐alkanedisulfonic acid‐doped PANi was higher than that of alkanesulfonic acid‐doped PANi which typically degrades around 250 °C, suggesting a moderately broader processing window for α,ω‐alkanedisulfonic acid‐doped PANi for blending with other thermoplastics. Copyright © 2012 Society of Chemical Industry 相似文献
5.
Ti-6A1-4V was surface alloyed with carbon using gas tungsten arc. Microstructural studies on scanning electron microscope showed that in the alloyed layer a cellular/dendritic phase was distributed in the matrix having an acicular structure. Analysis of the alloyed layer showed an average overall increase of 1.45 wt% in the carbon content. X-ray diffraction studies confirmed the presence of TiC in the alloyed zone. Electron probe microanalysis revealed that the cellular/dendritic phase was rich in carbon and had about 15 wt% carbon, whereas the matrix was depleted in carbon. We concluded from the detailed studies that the alloyed zone matrix was supersaturated with carbon in which TiC was distributed. As a result of this surface treatment, the alloyed layer hardness increased from 350 to 640 HV. 相似文献
6.
The role of cations in excitation energy distribution between the two photosystems of photosynthesis is well established. This paper provides evidence, for the first time, for an important role of anions in the regulation of distribution of absorbed light energy between the two photosystems. Inorganic anions caused redistribution of energy more in favour of photosystem I, as judged from measurements of chlorophyll a fluorescence transients, rates of electron transport in low light and 77 K fluorescence emission spectra: the Fv/Fm ratio was decreased by inorganic anions even in the presence of DCMU, the PS II electron transport was decreased whereas PS I electron transport was increased and the F735 (77 K emission from PS I)/F685 (77 K emission from PS II) ratio was increased. Such changes were observed with inorganic anions having different valencies (Cl- , SO4(2-), PO4(3-)): the higher the valency of the inorganic anion, the more the energy transferred towards PS I. Change in the valency of the inorganic anions thus regulates distribution of absorbed light energy between the two photosystems. However, organic anions like acetate, succinate, and citrate caused no significant changes in the Fv/Fm ratio, and in rates of PS I and PS II electron transport, showing their ineffectiveness in regulating light energy distribution. 相似文献
7.
Bharti K. Iyer 《LWT》2008,41(6):1053-1059
Idli is a fermented breakfast food widely consumed in Southern India. It is liked by people mainly due to its sensory attributes such as mouthfeel, appearance, taste and aroma. Fermentation time of the batter varies from 14 to 24 h with overnight fermentation being the most frequent time interval. Reduction in the fermentation time of the idli batter is of great commercial significance for large-scale idli production and this can be potentially achieved by addition of enzymes externally. The present study was undertaken to explore the possibility of expediting the idli batter fermentation process by adding an exogenous source of α-amylase enzyme. 5, 15 and 25 U per 100 g batter of amylase were added to the idli batter which was allowed to ferment. Different parameters were monitored and sensory attributes were also studied and compared with that of the control set. The fermentation time was reduced from a conventional 14 h to 8 h and the sensory attributes of the final product were also successfully maintained. 相似文献
8.
K.T.Sundara Raja Iyengar B.K.Raghu Prasad T.S. Nagaraj Bharti Patel 《Nuclear Engineering and Design》1996,163(3):397-403
The fictitious crack method (FCM) is applied to determine the load-deflection diagrams of notched plain concrete beams under three-point bending using various forms of strain softening in the stress-deformation relationship. The results indicate that there is a need to determine a more realistic relationship. 相似文献
9.
Arvind Bharti 《Bulletin of Materials Science》1988,11(2-3):191-212
A brief state-of-the-art review of laser welding has been presented. Results of our experimental studies on laser welding
of Ti-6Al-4V have been reported. Results of weld evaluation including microstructure, mechanical properties and microchemistry
have also been presented. 相似文献
10.
Surrounding vegetation, animal, human and microbiological decomposition are the strong source of humic acid (HA) falling into the surface water bodies through rain runoff in the monsoon. HA contains various functional groups, such as carboxylic, phenolic, hydroxyl, and quinine, which are the major foulant. Contact of HA may have an adversarial health issue to human beings namely goiter, black foot, and cancer disease. The maximum permissible limit of HA in drinking water should be less than 2 ppm as per the Environmental Protection Agency (EPA). The membrane technology has prevailed a prominent place worldwide in chemical, water and wastewater treatment technologies. The proposed work is focused on the blending of organic-water soluble polymer polyethylene glycol 6000 as a pore-forming agent and inorganic salt lithium bromide (LiBr) as membrane morphology modifier with polyvinylidene fluoride host polymer in the N,N-Dimethylacetamide solvent. All fabricated membranes were characterized for functional groups and morphology. The total number of pores per unit surface area of membrane for membranes M-LiBr-0, M-LiBr-1, M-LiBr-2, and M-LiBr-3 are 2 × 1013, 2.3 × 1014, 2.7 × 1014 and 2.82 × 1014, respectively. The static water contact angle was decreased from 68.2° to 50.6° with an increase in the content of LiBr from 0 to 3 wt%. The order of pure water flux and hydraulic permeability of the membrane was M-LiBr-0 < M-LiBr-1 < M-LiBr-2 < M-LiBr-3. The HA rejection of the membrane was also increased from 90.13% to 96.24% with LiBr content due to a decrease in pore size of the membrane with the addition of LiBr content. 相似文献