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61.
Dai J Bai J Hasegawa T Nishizawa S Sakai J Oka S Kiuchi M Hirose K Tomida A Tsuruo T Li M Ando M 《Chemical & pharmaceutical bulletin》2006,54(3):306-309
A new taxoid, 5alpha,13alpha-diacetoxy-10beta-cinnamoyloxy-4(20),11-taxadien-9alpha-ol (1) along with its 9,10-isomer, taxinine NN-11 (2) were isolated from the callus cultures of Taxus cuspidata. The structures were identified by the analyses of the spectral data and chemical method. Their in vitro cytotoxicity against 3 cell lines (HepG2, WI-38 and VA-13) and multidrug resistance (MDR) reversal activity toward 2780AD tumor cells were preliminarily evaluated, the low cytotoxicities and potent MDR reversal activities suggested that they might be good lead compounds of tumor MDR reversal agent. 相似文献
62.
Seiko Nan'Ya Hirofumi Ishida Ester J. Moiji Yasuo Butsugan Ashok C. Bajji 《Journal of heterocyclic chemistry》1994,31(2):401-403
2-Bromo-3-phenylinden-1-one 2 reacted with phenylthiourea to produce 2-phenylimino-8-phenylindeno[1,2-d]thiazole (heteropentalene) 4 in moderate yield and bis-substituted-indenyl sulfide 5 in low yield. Whereas, from the reaction of 2 with thiourea or its methyl derivative only 5 was obtained in moderate yield. Another brominated compound, dibromoacetylbenzophenone and several primary amines afforded iminoindanone derivatives 6 . 相似文献
63.
Seiko Nan'Ya Etur
Maekawa Wen-Bing Kang Yoshio Ueno 《Journal of heterocyclic chemistry》1986,23(2):589-592
The 1-substituted-5H-benzo[2,3-a]phenothiazin-5-one, 4-substituted-5H-benzo[6,5-a]phenothiazin-5-one and 6-substitutedbenzo[a][1,4] benzothiazino[3,2-c]phenothiazine derivatives were prepared by the condensation of 5-substituted-2,3-dichloro-1,4-naphthoquinones with 2-aminothiophenol. Reduction, acetylation and dehalogenation of the resulting compounds were carried out and the structures of the products were inferred from comparison with the authentic compound. 相似文献
64.
Yonemoto H Ogino S Nakashima MN Wada M Nakashima K 《Biomedical chromatography : BMC》2007,21(3):310-317
A simple and sensitive HPLC-UV method was developed for the determination of paclitaxel (TXL) in human and rat blood samples. 4-Hydroxybenzoic acid n-hexyl ester was used as an internal standard. TXL was extracted by a liquid-liquid extraction with tert-butylmethyl ether. The disturbing peaks in the case of serum sample were removed by pre-extraction with hexane. The separation of TXL was achieved within 25 min using an ODS column with 50% acetonitrile aqueous solution as a mobile phase at a flow rate of 1.0 mL/min. The eluent was monitored at 230 nm, and the resulted retention times of TXL and IS were 11.2 and 20.4 min. The detection limits of TXL for human plasma, serum and rat plasma samples at a signal-to-noise ratio of 3 were 10, 9.5 and 7.5 ng/mL, respectively. The proposed methods were applicable to the determination of TXL in human patients' plasma ranging from 15 to 27 ng/mL. Furthermore, monitoring of the time course of TXL after its single administration to rat could be demonstrated. 相似文献
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Okiko Miyata Kanami Muroya Tomoko Kobayashi Rina Yamanaka Seiko Kajisa Junko Koide Takeaki Naito 《ChemInform》2002,33(42):211-211