全文获取类型
收费全文 | 336篇 |
免费 | 15篇 |
专业分类
电工技术 | 1篇 |
化学工业 | 89篇 |
金属工艺 | 1篇 |
机械仪表 | 6篇 |
建筑科学 | 18篇 |
能源动力 | 13篇 |
轻工业 | 118篇 |
水利工程 | 1篇 |
无线电 | 6篇 |
一般工业技术 | 31篇 |
冶金工业 | 9篇 |
自动化技术 | 58篇 |
出版年
2023年 | 3篇 |
2022年 | 17篇 |
2021年 | 11篇 |
2020年 | 7篇 |
2019年 | 9篇 |
2018年 | 6篇 |
2017年 | 12篇 |
2016年 | 8篇 |
2015年 | 10篇 |
2014年 | 19篇 |
2013年 | 22篇 |
2012年 | 18篇 |
2011年 | 31篇 |
2010年 | 21篇 |
2009年 | 19篇 |
2008年 | 36篇 |
2007年 | 22篇 |
2006年 | 15篇 |
2005年 | 14篇 |
2004年 | 10篇 |
2003年 | 11篇 |
2002年 | 6篇 |
2001年 | 4篇 |
2000年 | 2篇 |
1999年 | 3篇 |
1998年 | 5篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1989年 | 2篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1976年 | 1篇 |
1968年 | 1篇 |
排序方式: 共有351条查询结果,搜索用时 15 毫秒
31.
Ana Isabel Nájera Yolanda Barcina Mercedes de Renobales L. J. R. Barron 《European Food Research and Technology》1998,207(3):197-201
The influence of traditional smoking on the triglyceride (TG) composition of Idiazabal cheese during ripening was studied
using HPLC. The partition numbers (PNs) of the TGs ranged between 22 and 53, the groupings of TG peaks with PN values of 36,
34, and 38 being the main contributors. Statistically significant differences between the smoked and the unsmoked cheeses
were recorded during the ripening period. Smoking had a significant effect on certain groups of TGs at different ripening
times and no effect on others. The differences in the TG profiles of the cheeses were the result of differing levels of lipolytic
activity, which was heightened by smoking.
Received: 29 December 1997 / Revised version: 9 March 1998 相似文献
32.
Yolanda Wu 《中国服装(北京)》2008,(7):32
“曾经,专业市场为中国纺织服装行业的发展出了大力气。但是现在.专业市场越来越多.重复建设、不正当竞争等问题却也屡见不鲜。专业市场的量上来了,质却还停滞不前。大多数专业市场的影响力只限于很小的一个地理范围,能在全国范围内产生影响的专业市场少之又少。如此的小打小闹.一方面无法支撑专业市场的发展,另方面使得业内外及消费者对专业市场的偏见越来越深。很多人认为,专业市场就是卖低档货的地方,其实不然。真正的专业市场,是为有实力的企业、包括品牌企业的流通和形象宣传服务的,为生产企业与商贸。DIL通企业的沟通和交易提供场所。所以.规范专业市场的问题就显得很迫切。”采访中.中国纺织品商业协会彭桂福会长的焦急之情溢于言表。 相似文献
33.
Yolanda HedbergOskar Karlsson Peter SzakalosInger Odnevall Wallinder 《Materials Letters》2011,65(14):2089-2092
Electron Backscatter Diffraction (EBSD) studies clearly revealed a different crystallographic structure of the smallest particle size fraction of gas-atomized AISI 316 L stainless steel powder (< 4 μm) compared with larger sized fractions of the same powder (< 45 μm). Despite similar chemical compositions, the predominating structure of the smallest particle size fraction was ferritic (i.e., has ferromagnetic properties) whereas the larger sized particle fractions and massive 316 L revealed an expected austenitic and non-magnetic structure. From these findings, it follows that direct magnetic separation can be applied to separate very fine sized particles. These structural differences explain previously observed dissimilarities from corrosion and metal release perspectives. 相似文献
34.
Alain BissonierChristian Chauveau Jean-Louis DelfauChristian Vovelle Yolanda Diaz De Mera 《Combustion and Flame》2002,129(3):239-252
An experimental study of the combustion of technical 1,2,3,4-tetrachlorobenzene has been carried out in conditions closely similar to those in incinerators of industrial hazardous wastes. A non-premixed flame fed by a fuel spray was stabilized in a reactor heated electrically. Measurements of axial and radial temperatures and species concentration profiles in well-defined conditions have been systematically repeated to specify the influence exerted by key parameters on the efficiency of the thermal degradation process. The reactor’s wall temperature was varied from 1223 to 1363 K. Air injection was distributed between axial and peripheral injectors to change the swirl intensity. Two fuel injectors have been compared to assess the influence of atomization efficiency. A methane-air pilot flame helped to anchor the flame and to decrease the overall Cl/H ratio. The latter was also decreased by addition of water vapor. Results show that conditions leading to a complete consumption of the fuel can be associated with very limited carbon conversion into CO2 and chlorine conversion into HCl. 相似文献
35.
Rodrigo Quezada-Lzaro Yessica Vzquez-Cobix Rocío Fonseca-Lin Porfirio Nava Daniel Dimitri Hernndez-Cueto Carlos Cedillo-Pelez Yolanda Lpez-Vidal Sara Huerta-Yepez M. Guadalupe Ortega-Pierres 《International journal of molecular sciences》2022,23(21)
In giardiasis, diarrhoea, dehydration, malabsorption, weight loss and/or chronic inflammation are indicative of epithelial barrier dysfunction. However, the pathogenesis of giardiasis is still enigmatic in many aspects. Here, we show evidence that a cysteine protease of Giardia duodenalis called giardipain-1, contributes to the pathogenesis of giardiasis induced by trophozoites of the WB strain. In an experimental system, we demonstrate that purified giardipain-1 induces apoptosis and extrusion of epithelial cells at the tips of the villi in infected jirds (Meriones unguiculatus). Moreover, jird infection with trophozoites expressing giardipain-1 resulted in intestinal epithelial damage, cellular infiltration, crypt hyperplasia, goblet cell hypertrophy and oedema. Pathological alterations were more pronounced when jirds were infected intragastrically with Giardia trophozoites that stably overexpress giardipain-1. Furthermore, Giardia colonization in jirds results in a chronic inflammation that could relate to the dysbiosis triggered by the protist. Taken together, these results reveal that giardipain-1 plays a key role in the pathogenesis of giardiasis. 相似文献
36.
Yolanda Moreno M. Carmen Collado M. Antonia Ferrús José M. Cobo Enrique Hernández & Manuel Hernández 《International Journal of Food Science & Technology》2006,41(3):275-280
The viability of lactic acid bacteria (LAB) from commercial fermented milks was studied during storage at 4 °C. The enumeration of total viable bacteria was assessed using fluorescence microscopy. Plate counting on selective media was used to enumerate LAB. Using LIVE/DEAD® BacLightTM viability staining, it was observed that bacterial counts decreased gradually after expiry dates, the number of viable bacteria remaining above 106 bacteria g?1 for all of the products. Viable cell counts estimated by plating onto selective media were lower than those obtained by direct microscopic counting. The viability of LAB contained in acid products decreased during their storage period at 4 °C. All products contain viable LAB ranging from 108 to 109 bacteria g?1 and could be considered as probiotic, given that the recommended minimum number of probiotic bacteria in such food products is approximately 107 bacteria mL?1 product. The number of bifidobacteria in commercial fermented milks declared to contain bifidobacteria varied from 104 to 107 bacteria mL?1. This study confirms the usefulness of fluorescent techniques for a rapid and accurate evaluation of bacterial viability in probiotic products. 相似文献
37.
Diñeiro Y Menéndez MI Blanco-López MC Lobo-Castañón MJ Miranda-Ordieres AJ Tuñón-Blanco P 《Analytical chemistry》2005,77(20):6741-6746
A methodology based on density functional theory calculations for the design of molecularly imprinted polymers (MIPs) is described. The method allows the rational choice of the most suitable monomer and polymerization solvent among a set of chemicals traditionally used in MIP formulations for the molecular imprinting of a given template. It is based on the comparison of the stabilization energies of the prepolymerization adducts between the template and different functional monomers. The effect of the polymerization solvent is included using the polarizable continuum model. A voltammetric sensor for homovanillic acid was constructed using different MIPs as recognition element, confirming that the solvent (toluene) and functional monomer (methacrylic acid) selected according to the theoretical predictions lead to the most efficient molecular recognition sensing phase. With the voltammetric sensor prepared using the MIP designed according to the theoretical predictions, a linear response for concentrations of homovanillic acid between 5 x 10(-8) and 1 x 10(-5) M can be obtained. The limit of detection is 7 x 10(-9) M. The selectivity obtained for homovanillic acid over other structurally related compounds buttresses the validity of this strategy of design. 相似文献
38.
Direct chemical sensing in liquid environments using polymer-guided shear horizontal surface acoustic wave sensor platforms on 36 degrees rotated Y-cut LiTaO3 is investigated. Design considerations for optimizing these devices for liquid-phase detection are systematically explored. Two different sensor geometries are experimentally and theoretically analyzed. Dual delay line devices are used with a reference line coated with poly (methyl methacrylate) (PMMA) and a sensing line coated with a chemically sensitive polymer, which acts as both a guiding layer and a sensing layer or with a PMMA waveguide and a chemically sensitive polymer. Results show the three-layer model provides higher sensitivity than the four-layer model. Contributions from mass loading and coating viscoelasticity changes to the sensor response are evaluated, taking into account the added mass, swelling, and plasticization. Chemically sensitive polymers are investigated in the detection of low concentrations (1-60 ppm) of toluene, ethylbenzene, and xylenes in water. A low-ppb level detection limit is estimated from the present experimental measurements. Sensor properties are investigated by varying the sensor geometries, coating thickness combinations, coating properties, and curing temperature for operation in liquid environments. Partition coefficients for polymer-aqueous analyte pairs are used to explain the observed trend in sensitivity for the polymers PMMA, poly(isobutylene), poly(epichlorohydrin), and poly(ethyl acrylate) used in this work. 相似文献
39.
40.
Madrera Roberto Rodríguez Valles Belén Suárez García Yolanda Diñeiro del Valle Argüelles Paula Lobo Anna Picinelli 《Food science and biotechnology》2010,19(4):1129-1134
Work has commenced on the study and characterization of wood native species (oak, chestnut, cherry, alder, ash, and beech),
employed to a minor extent in enology, for their application in the elaboration of distillates. To this end, furanic and low
molecular weight phenol compounds, total phenolic content, and antioxidant activity in alcoholic extracts by maceration of
wood chips at 2 toasting levels were studied. Significant differences between samples, technologically relevant, were due
both to species and toasting time. Furthermore, extracts showed interesting antioxidant activities equivalent in some cases
to than those reported for alcoholic beverages aged in wood. 相似文献