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以2-巯基苯并噻唑为原料,设计合成了一种结构简单的苯并噻唑类荧光探针2-[2-(苯并噻吩-2-基亚甲基)肼基]苯并噻唑(简称NSS),并通过FTIR、HRMS、1HNMR、13CNMR对其结构进行了表征。荧光光谱表明,在二甲基亚砜中,探针NSS实现了Zn2+的“关-开”型检测,具有响应时间短(30 s)、特异性强、抗干扰性强等优点。探针NSS荧光强度与Zn2+浓度(0~11μmol/L)呈现良好的线性关系,检出限达19.1 nmol/L,并与Zn2+形成物质的量比为1∶1的络合物。同时,络合物NSS-Zn2+对草甘膦呈现特异性的荧光猝灭响应,猝灭率达99.4%,检出限16.0 nmol/L(2.71 ng/mL),且不受其他有机磷农药的干扰。 相似文献
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He Zhongyi Xiong Liping Qian Liang Han Sheng Chen Aixi Qiu Jianwei Fu Xisheng 《Lubrication Science》2014,26(2):81-94
A novel borate ester derivative containing mercaptobenzothiazol and ethanolamine group (BMB) was synthesised and characterised. Its tribological properties in RSO were evaluated using a four‐ball tribometer, and its action mechanisms were investigated by scanning electron microscopy and X‐ray photoelectron spectroscopy. Its hydrolysis stability was investigated by open observation method and half‐time method, and its mechanism was discussed through Gaussian calculation. Results show that BMB possesses excellent extreme pressure, better anti‐wear performances and excellent hydrolysis stability for lone electron of nitrogen atoms forming a coordination effect with B atom. The boundary film, which contains organic nitrogen and inorganic salt, such as BN, Fe2(SO4)3 and Fe‐O‐B, contributed to improve the tribological properties of RSO. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
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研究了合成 2肼基 4甲基苯并噻唑的工艺 ,获得了可靠的工艺条件 ,放大实验结果表明产品的得率达 90 %。 相似文献
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Fate of trace organics during rapid infiltration of primary wastewater at Fort Devens, Massachusetts
Transport and fate of trace organics were studied during rapid infiltration of primary wastewater at a land application facility in Fort Devens, Massachusetts. A preliminary sampling trip was made to compare trace organic concentrations in the infiltrating wastewater and in ground water samples from three monitoring wells around the site. Trace organic concentrations were reduced by the rapid infiltration process. However, significant concentrations of specific compounds could be detected in ground water down-gradient of the site.Therefore, a field study was undertaken to determine the primary region where trace organics were removed in the system. Teflon monitoring wells were installed at a depth of 1.2 m in one of the basins at the site prior to flooding. Flooding was initiated and samples of the raw wastewater, the wastewater entering the basin, the infiltrate at 1.2-m depth and the ground water down-gradient of the site were analyzed for six compounds selected for the study.Results from replicate samples during the 6-day flooding period demonstrated that most of the removal for the six compounds occurred in the top meter of the soil, although concentrations of each compound increased substantially in the basin infiltrate from two of the sample points after the fourth day of flooding. No removal of p-dichlorobenzene, p-(I,1,3,3-tetramethylbutyl)phenol and 2-(methylthio)benzothiazole was apparent in the aquifer itself, as indicated by relatively high concentrations of these compounds in the contaminated monitoring well down-gradient of the site.These data indicate that trace organic concentrations in primary effluent can be reduced by rapid infiltration and that most of the removal occurs in the top meter of the soil during the early phase of the flooding cycle. This removal capability can rapidly diminish, however, and result in ground water contamination by trace organics above background levels. 相似文献
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Monomer with thiazole moiety was synthesized and copolymerized with butyl acrylate and methyl methacrylate by reversible addition fragmentation chain transfer emulsion polymerization. The chain transfer agent was synthesized using N-ethyl piperazine, carbon disulfide, and ethyl 2-bromoisobutyrate. The wt% of monomer was varied from 3, 5, 7, 9, and 12 respectively. A antimicrobial activities of monomer and its copolymers were screened against E. coli, B. subtilis, C. albicans, and Aspergillus niger microorganisms. The synthesized monomer and chain transfer agent were characterized by 1H NMR, FTIR, and mass spectral analysis, whereas emulsion copolymers were characterized for their molecular weight, particle size, and FTIR analysis. 相似文献
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