全文获取类型
收费全文 | 222篇 |
免费 | 2篇 |
专业分类
电工技术 | 3篇 |
综合类 | 1篇 |
化学工业 | 32篇 |
金属工艺 | 1篇 |
矿业工程 | 1篇 |
能源动力 | 2篇 |
轻工业 | 8篇 |
水利工程 | 1篇 |
石油天然气 | 1篇 |
无线电 | 14篇 |
一般工业技术 | 14篇 |
冶金工业 | 136篇 |
自动化技术 | 10篇 |
出版年
2022年 | 3篇 |
2020年 | 1篇 |
2019年 | 3篇 |
2018年 | 2篇 |
2017年 | 2篇 |
2016年 | 2篇 |
2015年 | 2篇 |
2014年 | 2篇 |
2013年 | 9篇 |
2012年 | 7篇 |
2011年 | 5篇 |
2009年 | 3篇 |
2008年 | 1篇 |
2007年 | 7篇 |
2006年 | 1篇 |
2005年 | 3篇 |
2004年 | 3篇 |
2003年 | 4篇 |
2002年 | 3篇 |
2001年 | 5篇 |
2000年 | 1篇 |
1999年 | 5篇 |
1998年 | 35篇 |
1997年 | 26篇 |
1996年 | 15篇 |
1995年 | 5篇 |
1994年 | 14篇 |
1993年 | 7篇 |
1991年 | 3篇 |
1990年 | 3篇 |
1989年 | 2篇 |
1988年 | 3篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 3篇 |
1981年 | 2篇 |
1980年 | 2篇 |
1978年 | 1篇 |
1977年 | 5篇 |
1976年 | 18篇 |
1965年 | 1篇 |
1955年 | 1篇 |
排序方式: 共有224条查询结果,搜索用时 15 毫秒
91.
Gangliosides were found to be present in Entamoeba histolytica. They were extracted from lyophilized trophozoites of the pathogenic strain HM-1:IMSS and purified by high performance thin-layer chromatography. Two resorcinol-positive bands, comigrating with GM2 and GD1a were demonstrated, revealing the existence of ganglioside molecules in Entamoeba histolytica. The GM2 content, determined as lipid-bound sialic acid, was 1.5 micrograms/10(8) amoebae, the content of the GD1a comigrating band was 0.32 microgram/10(8) amoebae. The identity of the GM2 comigrating band was confirmed by TLC immunostaining, using the monoclonal anti-GM2 antibody GMB28. Furthermore, six out of ten anti-amoeba positive sera selectively reacted with the GM2 comigrating band, as revealed by immunostaining on TLC plates. Absorption tests revealed that preincubation of anti-amoeba positive sera with standard GM2 was followed by a significant decrease in the reaction with amoeba trophozoites by indirect immunofluorescence. These results demonstrate that a GM2 comigrating component of Entamoeba histolytica may be one of the antigens responsible for the appearance of circulating antibodies in patients with amoebiasis. 相似文献
92.
J Viguier L D'Alteroche C Regimbeau L Picon V Jan A De Muret ZA Benchellal EH Metman 《Canadian Metallurgical Quarterly》1998,22(8-9):715-719
We report the case of a 67-year-old-man presenting with pancreatic acinar cell carcinoma revealed by dermatological manifestations of cytosteatonecrosis and treated by hepatic artery ligation. The pancreatic etiology of these lesions was suspected due to hyperlipasemia, and was confirmed by abdominal computerized tomography showing a pancreatic tumor and multiple liver nodules, and by histological examination of one of these lesions. Because of symptomatic treatment failure, rapid impairment of patient's general condition, and by analogy with the treatment of hepatic metastases of neuroendocrine tumors, hepatic artery ligation was performed. Lipasemia decreased markedly and symptoms disappeared for 45 days. Hepatic artery obstruction may be used for emergency treatment of secreting liver metastases. 相似文献
93.
94.
Breidi Albach Marilda Munaro Pedro H. Santos Sônia F. Zawadzki Wido H. Schreiner Daniel S. Rampon Ronilson V. Barbosa 《应用聚合物科学杂志》2018,135(5)
Polypropylene composites containing modified kaolinite were prepared using melt processing and the morphological, thermal, mechanical and their water barrier properties were analyzed. To improve compatibility with polypropylene, kaolinite was modified with silane as a coupling agent. Characterization techniques (X‐ray diffraction, Fourier transform infrared spectroscopy, and X‐ray photoelectron spectroscopy) confirmed the effective grafting of these compounds on the surface and edges of the kaolinite with no functionalization on the inner surface. The differential scanning calorimetry and X‐ray diffraction techniques demonstrated that the addition of grafted kaolinite affected the iPP crystallinity. The thermogravimetric analysis helped to determine the thermal stability of the composites, being this, dependent on the amount of kaolinite and silane. The stress–strain tests demonstrated an increase in Young's modulus and obtained a 70% reduction in water vapor permeation. These improvements were mainly related to the increased compatibility between the iPP/Kaol interfaces promoted by the silane. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 45785. 相似文献
95.
J. Wrzyszcz M. Zawadzki J. Trawczyski H. Grabowska W. Mita 《Applied Catalysis A: General》2001,210(1-2):263-269
Two samples of zinc aluminate were hydrothermally synthesised from zinc acetate and different aluminium sources: basic aluminium nitrate or aluminium hydroxide. The textural properties of the prepared ZnAl2O4 samples are different from these one of the zinc aluminate prepared by conventional way. Powder XRD and TEM measurements reveal that samples are single-phase material or mixture of ZnAl2O4 with small amount of γ-Al2O3, with morphology of quasi-spherical shape. Catalytic properties of the hydrothermally obtained zinc aluminate and Pt (Pd) catalysts supported on them were investigated in the reactions of cyclohexene isomerisation and combustion of trichloroethylene, respectively. It was evidenced that activity and selectivity of the investigated materials could be qualitatively correlated with the part of the strong acid centres measured by TPD of NH3. 相似文献
96.
97.
A resuscitation equipment board for mounting in delivery rooms and nurseries facilitates orderly and effective resuscitation of asphyxiated neonates. 相似文献
98.
99.
AV Maksimenko MB Gottikh EA Kubareva OA Fedorova ZA Shabarova 《Canadian Metallurgical Quarterly》1998,379(4-5):625-630
Cyclic and polycyclic oligonucleotides were synthesized using chemical ligation. Two types of catenanes with one and several intertwinings were produced. The yield of these molecules depended on the ligation conditions and nucleotide sequence of the ligated oligonucleotide and its template. Structure of ligation products was investigated and confirmed using restriction endonuclease MvaI. Interaction of the synthesized molecules with restriction endonucleases SsoII, EcoRII and HindIII was also studied. 相似文献
100.