全文获取类型
收费全文 | 120篇 |
免费 | 16篇 |
专业分类
电工技术 | 1篇 |
化学工业 | 30篇 |
金属工艺 | 3篇 |
机械仪表 | 1篇 |
建筑科学 | 15篇 |
矿业工程 | 2篇 |
能源动力 | 7篇 |
轻工业 | 14篇 |
水利工程 | 2篇 |
无线电 | 12篇 |
一般工业技术 | 25篇 |
冶金工业 | 5篇 |
原子能技术 | 6篇 |
自动化技术 | 13篇 |
出版年
2022年 | 3篇 |
2021年 | 4篇 |
2020年 | 5篇 |
2019年 | 5篇 |
2018年 | 10篇 |
2017年 | 5篇 |
2016年 | 8篇 |
2015年 | 10篇 |
2014年 | 5篇 |
2013年 | 12篇 |
2012年 | 11篇 |
2011年 | 12篇 |
2010年 | 6篇 |
2009年 | 6篇 |
2008年 | 2篇 |
2007年 | 4篇 |
2006年 | 5篇 |
2005年 | 4篇 |
2002年 | 2篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1999年 | 3篇 |
1998年 | 3篇 |
1997年 | 2篇 |
1995年 | 1篇 |
1992年 | 1篇 |
1987年 | 1篇 |
1986年 | 2篇 |
1983年 | 1篇 |
1970年 | 1篇 |
排序方式: 共有136条查询结果,搜索用时 234 毫秒
71.
Dr. Ageo Miccoli Dr. Binar A. Dhiani Dr. Peter J. Thornton Olivia A. Lambourne Dr. Edward James Dr. Hachemi Kadri Dr. Youcef Mehellou 《ChemMedChem》2020,15(8):671-674
The specific targeting of protein-protein interactions by phosphoserine-containing small molecules has been scarce due to the dephosphorylation of phosphoserine and its charged nature at physiological pH, which hinder its uptake into cells. To address these issues, we herein report the synthesis of phosphoserine aryloxy triester phosphoramidates as phosphoserine prodrugs that are enzymatically metabolized to release phosphoserine. This phosphoserine-masking approach was applied to a phosphoserine-containing inhibitor of 14-3-3 dimerization, and the generated prodrugs exhibited improved pharmacological activity. Collectively, this provided a proof of concept that the masking of phosphoserine with biocleavable aryloxy triester phosphoramidate masking groups is a viable intracellular delivery system for phosphoserine-containing molecules. Ultimately, this will facilitate the discovery of phosphoserine-containing small-molecule therapeutics. 相似文献
72.
A. Barkat B. Menadi E. Kadri H. Soualhi 《Journal of Adhesion Science and Technology》2019,33(9):963-985
Various mineral additions are used in the manufacture of self-compacting concrete (SCC) to reduce the cement content and hence the CO2 emissions and also to enhance the performance of concrete. In this paper, the results of fresh and hardened properties of self-compacting limestone cement mortar (SCLCM) and concrete (SCLCC) with metakaolin (MK) as cement replacement are reported. SCLCM properties investigated include spread flow, V-funnel flow time, yield stress, plastic viscosity and heat evolution. SCLCC fresh properties include slump flow, V-funnel flow time, J-Ring, L-Box and sieve segregation. Compressive strength of the hardened SCLCC was measured at the ages of 1, 3, 7, 28, 90, and 180?days. Moreover, water porosity, water absorption by capillarity and dynamic modulus of elasticity (Ed) tests were conducted. Test results indicated that the produced MK is of sufficient pozzolanic activity and contributes to improve the performances of concrete in particular at later stages. The addition of MK to SCLCM mixes exhibits lower heat evolution, lower yield stress, higher plastic viscosity and higher V-funnel flow time. The addition of MK to SCLCC mixes improves the rheological properties (flowability, passing ability and segregation resistance) as well as the mechanical and durability performance. 相似文献
73.
Machine Learning - K-means—and the celebrated Lloyd’s algorithm—is more than the clustering method it was originally designed to be. It has indeed proven pivotal to help increase... 相似文献
74.
We report the successful repair of pulmonary incompetence in an adult due to the congenital absence of the posterior leaflet of the pulmonary valve. The repair consisted of bicuspidization of the pulmonary valve, which achieved competence and eliminated the symptoms and echocardiographic manifestations of right ventricular overload while preserving the native valve. 相似文献
75.
Mustapha Djama Djaffar Saidi Abdelaziz Kadri Nabil Kherrouba Brahim Mehdi Stéphane Mathieu Thierry Schweitzer Idir Brahim 《Journal of Materials Engineering and Performance》2018,27(8):3911-3919
The aim of this work is to correlate the pitting potential (Epit) evolution with the kinetics of σ phase precipitation in the 2205 duplex stainless steel aged at 850 °C after solution treatment at 1150 °C. The potentiodynamic polarization curves indicate a reduction of the pitting corrosion resistance with the aging time, which is revealed by a decrease in the Epit values from 0.65 to 0.40 VSCE. Thus, Epit values are used to determine the kinetics parameters of the σ phase precipitation. The experimental transformed fraction agrees well with the one calculated by using the modified Kolmogorov–Johnson–Mehl–Avrami equation with an impingement parameter c?=?0.6. 相似文献
76.
Baiba Brmele Margit Mutso Lilian Telanne Kadri
unap Karna Spunde Aare Abroi Reet Kurg 《International journal of molecular sciences》2021,22(24)
Methylation is an essential epigenetic modification mainly catalysed by S-Adenosyl methionine-dependent methyltransferases (MTases). Several MTases require a cofactor for their metabolic stability and enzymatic activity. TRMT112 is a small evolutionary conserved protein that acts as a co-factor and activator for different MTases involved in rRNA, tRNA and protein methylation. Using a SILAC screen, we pulled down seven methyltransferases—N6AMT1, WBSCR22, METTL5, ALKBH8, THUMPD2, THUMPD3 and TRMT11—as interaction partners of TRMT112. We showed that TRMT112 stabilises all seven MTases in cells. TRMT112 and MTases exhibit a strong mutual feedback loop when expressed together in cells. TRMT112 interacts with its partners in a similar way; however, single amino acid mutations on the surface of TRMT112 reveal several differences as well. In summary, mammalian TRMT112 can be considered as a central “hub” protein that regulates the activity of at least seven methyltransferases. 相似文献
77.
Yahya Wan Nurlina Wan Kadri Nahrizul Adib Ibrahim Fatimah 《Microsystem Technologies》2019,25(8):3037-3045
Microsystem Technologies - This paper presents the design and numerical analysis of a new three-dimensional (3D) electrode having a non-uniform electric field gradient for dielectrophoretic... 相似文献
78.
Social and ethnic stratification has changed significantly in the former Soviet space since 1991. This research analyses the evolution of inherited ethnic differences in housing during two post-Soviet decades in Tartu, Estonia. The results suggest that ethnic inequalities in dwelling type as well as in housing size per person decreased between 1989 and 2008. More minorities now occupy single-family houses than at the end of the Soviet period. Access to modern facilities within dwelling units, however, is still higher among the minority population. We conclude that inherited ethnic differences in housing conditions were pronounced and, despite evidence of decreasing housing inequalities, subsequent changes have been too modest to overcome inherited patterns of housing segmentation from the Soviet period. 相似文献
79.
ABSTRACT This paper will describe the process of identifying lead contaminated soil areas exceeding a certain threshold at a historical mining district using geostatistical tools. For this purpose, lead concentration samples coming from Leadville County, Colorado were chosen as the data sets to be examined. In order to check integrity of data files, posting of the data values at sample locations is performed on each of the four data sets available. Statistical analysis is used for identifying possible different populations within the study area Based on the statistical results, the data sets were subdivided into four different populations as they relate to residential domains. More detail geostatistical analysis of data set representing the City of Leadville domain (CL) is performed Variogram analysis is used to characterize spatial variability on the data sets within CL limits. Generation of variograms for such data sets and identification of their parameters such as sill, nugget, range, and anisotropy ratios is performed. Once these parameters are identified, variogram modeling is accomplished. A significant spatial correlation is found within CL boundaries and two geostatistical estimation techniques named ordinary kriging and indicator kriging are applied to determine level of contamination at unsampled locations exceeding 3500 PPM threshold. Such techniques are tested by cross validation in order to check possible overestimation bias over 3500 PPM threshold. Indicator Kriging was found to be the best estimator which provided the minimum overestimation bias of areas of contamination exceeding 3500 PPM threshold compared with ordinary kriging. 相似文献
80.