全文获取类型
收费全文 | 28337篇 |
免费 | 2161篇 |
国内免费 | 52篇 |
专业分类
电工技术 | 239篇 |
综合类 | 117篇 |
化学工业 | 7838篇 |
金属工艺 | 583篇 |
机械仪表 | 583篇 |
建筑科学 | 980篇 |
矿业工程 | 72篇 |
能源动力 | 984篇 |
轻工业 | 5978篇 |
水利工程 | 259篇 |
石油天然气 | 212篇 |
武器工业 | 1篇 |
无线电 | 1478篇 |
一般工业技术 | 4532篇 |
冶金工业 | 2346篇 |
原子能技术 | 168篇 |
自动化技术 | 4180篇 |
出版年
2024年 | 68篇 |
2023年 | 242篇 |
2022年 | 909篇 |
2021年 | 1249篇 |
2020年 | 825篇 |
2019年 | 945篇 |
2018年 | 1149篇 |
2017年 | 1147篇 |
2016年 | 1258篇 |
2015年 | 908篇 |
2014年 | 1336篇 |
2013年 | 2418篇 |
2012年 | 1872篇 |
2011年 | 2127篇 |
2010年 | 1601篇 |
2009年 | 1505篇 |
2008年 | 1346篇 |
2007年 | 1212篇 |
2006年 | 909篇 |
2005年 | 756篇 |
2004年 | 681篇 |
2003年 | 643篇 |
2002年 | 560篇 |
2001年 | 386篇 |
2000年 | 328篇 |
1999年 | 320篇 |
1998年 | 921篇 |
1997年 | 620篇 |
1996年 | 429篇 |
1995年 | 290篇 |
1994年 | 240篇 |
1993年 | 189篇 |
1992年 | 110篇 |
1991年 | 88篇 |
1990年 | 68篇 |
1989年 | 81篇 |
1988年 | 78篇 |
1987年 | 56篇 |
1986年 | 42篇 |
1985年 | 77篇 |
1984年 | 51篇 |
1983年 | 45篇 |
1982年 | 49篇 |
1981年 | 40篇 |
1980年 | 51篇 |
1979年 | 36篇 |
1978年 | 34篇 |
1977年 | 46篇 |
1976年 | 68篇 |
1973年 | 25篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
María Clara Verdi Constanza Melian Patricia Castellano Graciela Vignolo Mariana Blanco Massani 《International Journal of Food Science & Technology》2020,55(1):267-275
The effectiveness of antimicrobial mixtures against Listeria innocua 7, used as a L. monocytogenes surrogate, was investigated in broth and a food system. Synergistic effects were found for nisin (Nis), potassium sorbate (PS), calcium propionate (CP) and sodium lactate (SL), Nis + PS being the most effective binary mixture that exhibited listericidal activity in broth. To assess the effect of adding lactocin AL705 (AL705) to Nis + organic acid salt combinations, tridimensional isobolograms were generated. Sub-MIC combinations of the antimicrobials exerted bactericidal activity against L. innocua 7 after AL705 addition to the binary mixtures. However, when applied on Sardo cheese contaminated with L. innocua 7 (initial inoculum 4.45 ± 0.06 CFU g−1), only Nis + PS + AL705 produced count reductions respect to the control, reaching 3.04 ± 0.35 CFU g−1 counts after 15 days at 15 °C. Ternary combinations containing AL705 showed potential to reduce antimicrobial usages for L. innocua 7 inhibition. 相似文献
52.
53.
Application of high‐temperature Fenton oxidation for the treatment of sulfonation plant wastewater
下载免费PDF全文
![点击此处可从《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
54.
Crespo Juan-José Sánchez José L. Alfaro-Cortés Francisco J. Flich José Duato José 《The Journal of supercomputing》2021,77(11):12826-12856
The Journal of Supercomputing - Deadlock-free dynamic network reconfiguration process is usually studied from the routing algorithm restrictions and resource reservation perspective. The dynamic... 相似文献
55.
Ricardo Cambraia Parreira Diana Paola Gmez‐Mendoza Itamar Couto Guedes de Jesus Rafael Pereira Lemos Anderson Kennedy Santos Cristiana Perdigo Rezende Henrique Csar Pereira Figueiredo Mauro Cunha Xavier Pinto Frank Kjeldsen Silvia Guatimosim Rodrigo Ribeiro Resende Thiago Verano‐Braga 《Proteomics. Clinical applications》2020,14(4)
56.
Caio Felippe Curitiba Marcellos Camila M. Senna Figueiredo Frederico W. Tavares Maurício Bezerra de Souza Jr. Paulo Laranjeira da Cunha Lage João Francisco Cajaiba da Silva Argimiro R. Secchi Amaro G. Barreto Jr. 《加拿大化工杂志》2020,98(11):2435-2450
An experimental methodology for inferring brine dissolution rate in monoethylene glycol (MEG) solutions at different temperatures using a webcam combined with a mathematical model is presented. The measurement system is designed to track the RGB (red, green, and blue) colour variations during the dissolution process. A dynamic model augmented with the population balance equation is applied to describe the dissolution process. Moreover, the dissolution rate is consistently related to the temperature and MEG concentration through the driving force based on the Gibbs energy and chemical affinity. The applied low-cost measurement apparatus proved to be a useful resource for tracking the dissolution dynamics in a wide range of undersaturation. 相似文献
57.
58.
59.
Alfredo M. Gravagnuolo Eden Morales‐Narváez Charlene Regina Santos Matos Sara Longobardi Paola Giardina Arben Merkoçi 《Advanced functional materials》2015,25(38):6084-6092
Class I hydrophobin Vmh2, a peculiar surface active and versatile fungal protein, is known to self‐assemble into chemically stable amphiphilic films, to be able to change wettability of surfaces, and to strongly adsorb other proteins. Herein, a fast, highly homogeneous and efficient glass functionalization by spontaneous self‐assembling of Vmh2 at liquid–solid interfaces is achieved (in 2 min). The Vmh2‐coated glass slides are proven to immobilize not only proteins but also nanomaterials such as graphene oxide (GO) and quantum dots (QDs). As models, bovine serum albumin labeled with Alexa 555 fluorophore, anti‐immunoglobulin G antibodies, and cadmium telluride QDs are patterned in a microarray fashion in order to demonstrate functionality, reproducibility, and versatility of the proposed substrate. Additionally, a GO layer is effectively and homogeneously self‐assembled onto the studied functionalized surface. This approach offers a quick and simple alternative to immobilize nanomaterials and proteins, which is appealing for new bioanalytical and nanobioenabled applications. 相似文献
60.