全文获取类型
收费全文 | 387篇 |
免费 | 32篇 |
专业分类
综合类 | 1篇 |
化学工业 | 119篇 |
金属工艺 | 7篇 |
机械仪表 | 9篇 |
建筑科学 | 14篇 |
能源动力 | 9篇 |
轻工业 | 106篇 |
水利工程 | 3篇 |
石油天然气 | 3篇 |
无线电 | 13篇 |
一般工业技术 | 38篇 |
冶金工业 | 17篇 |
原子能技术 | 1篇 |
自动化技术 | 79篇 |
出版年
2023年 | 5篇 |
2022年 | 24篇 |
2021年 | 29篇 |
2020年 | 20篇 |
2019年 | 15篇 |
2018年 | 14篇 |
2017年 | 17篇 |
2016年 | 23篇 |
2015年 | 14篇 |
2014年 | 20篇 |
2013年 | 28篇 |
2012年 | 32篇 |
2011年 | 33篇 |
2010年 | 21篇 |
2009年 | 20篇 |
2008年 | 18篇 |
2007年 | 16篇 |
2006年 | 16篇 |
2005年 | 7篇 |
2004年 | 4篇 |
2003年 | 7篇 |
2002年 | 4篇 |
2001年 | 4篇 |
1999年 | 2篇 |
1998年 | 6篇 |
1997年 | 5篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1980年 | 2篇 |
排序方式: 共有419条查询结果,搜索用时 8 毫秒
51.
Anti‐adhesion activity of thyme (Thymus vulgaris L.) extract,thyme post‐distillation waste,and olive (Olea europea L.) leaf extract against Campylobacter jejuni on polystyrene and intestine epithelial cells 下载免费PDF全文
52.
53.
Karla Hanousek i
a Maja Rupert Piotr Koczo Dorota Derewiaka Jasenka Gajdo‐Kljusuri Vlatka Petravi‐Tominac Jasna Mrv
i Damir Stanzer 《Journal of the Institute of Brewing》2019,125(1):143-154
Mistletoe (Viscum album) is mostly used in its herbal form owing to its content of diverse biologically active substances. In Croatia's Adriatic region, it is used for production of Biska, a strong alcoholic beverage produced by maceration of mistletoe in spirit or brandy, with or without the addition of honey. In this work, Biska was characterised by analysis of aroma compounds and physicochemical parameters and is the first study of the aroma profile of a strong alcoholic beverage produced with mistletoe. The aroma of 14 samples of Biska – five commercial and nine homemade – was analysed using GC/MS with solid‐phase microextraction. A total of 166 aroma compounds were detected. Major components were ethyl esters (medium and long chain fatty acids), fatty alcohols, isopropyl myristate, aldehyde decanal and some terpenes. The distribution of aroma compounds was evaluated by principal component analysis. Some significant differences in physicochemical properties were observed including ethanol concentration (28–44% v/v) and pH (4.4–6.5). Although the colour of Biska was light brown with greenish reflections, there were differences in chromatic parameters. The commercial samples were darker and were less transparent than homemade Biska, perhaps reflecting more extensive maceration/extraction or the addition of caramel. © 2018 The Institute of Brewing & Distilling 相似文献
54.
Tomislav Mašek Luka Krstulović Diana Brozić Marina Vranić Maja Maurić Miroslav Bajić Kristina Starčević 《European Food Research and Technology》2014,238(4):635-640
The objective of the study was to explore whether it is possible to alter cow colostrum and early milk fatty acid composition with a low level of fat supplement, high in docosahexaenoic (DHA) and eicosapentaenoic (EPA) fatty acid. Diets included a control diet and a diet supplemented with DHA- and EPA-enriched fat supplement. Addition of fat supplement significantly decreased saturated fatty acids, C14:0 and C16:0 and increased the values of monounsaturated fatty acids, polyunsaturated fatty acids (PUFA), n3 fatty acids, EPA, DHA, C18:1n9cis and C18:1n11trans. The percentage of short-chain fatty acids significantly increased with the progress of lactation, while the percentage of PUFA, n3 and n6 significantly decreased. These results showed that fat supplement, high in DHA and EPA, modified the fatty acid profile of colostrum and milk fat and increased the proportion of beneficial fatty acids for human health. 相似文献
55.
56.
Maja Mikulic‐Petkovsek Franci Stampar Robert Veberic Helena Sircelj 《Journal of food science》2016,81(8):C1928-C1937
Sugars, organic acids, carotenoids, tocopherols, chlorophylls, and phenolic compounds were quantified in fruit of 4 wild growing Prunus species (wild cherry, bird cherry, blackthorn, and mahaleb cherry) using HPLC‐DAD‐MSn. In wild Prunus, the major sugars were glucose and fructose, whereas malic and citric acids dominated among organic acids. The most abundant classes of phenolic compounds in the analyzed fruit species were anthocyanins, flavonols, derivatives of cinnamic acids, and flavanols. Two major groups of anthocyanins measured in Prunus fruits were cyanidin‐3‐rutinoside and cyanidin‐3‐glucoside. Flavonols were represented by 19 derivatives of quercetin, 10 derivatives of kaempferol, and 2 derivatives of isorhamnetin. The highest total flavonol content was measured in mahaleb cherry and bird cherry, followed by blackthorn and wild cherry fruit. Total phenolic content varied from 2373 (wild cherry) to 11053 mg GAE per kg (bird cherry) and ferric reducing antioxidant power antioxidant activity from 7.26 to 31.54 mM trolox equivalents per kg fruits. 相似文献
57.
Kieran Jordan Marion Dalmasso Juergen Zentek Anneluise Mader Geert Bruggeman John Wallace Dario De Medici Alfonsina Fiore Estella Prukner‐Radovcic Maja Lukac Lars Axelsson Askild Holck Hanne Ingmer Mindaugas Malakauskas 《Journal of the science of food and agriculture》2014,94(15):3079-3089
Foodborne illness continues as a considerable threat to public health. Despite improved hygiene management systems and increased regulation, pathogenic bacteria still contaminate food, causing sporadic cases of illness and disease outbreaks worldwide. For many centuries, microbial antagonism has been used in food processing to improve food safety. An understanding of the mode of action of this microbial antagonism has been gained in recent years and potential applications in food and feed safety are now being explored. This review focuses on the potential opportunities presented, and the limitations, of using microbial antagonism as a biocontrol mechanism to reduce contamination along the food chain; including animal feed as its first link. © 2014 Society of Chemical Industry 相似文献
58.
Domijan AM Peraica M Vrdoljak AL Radić B Zlender V Fuchs R 《Molecular nutrition & food research》2007,51(9):1147-1151
The aim of this study was to find out whether very low doses of nephrotoxic and hepatotoxic mycotoxins ochratoxin A (OTA) and fumonisin B1 (FB1) induce oxidative stress in rat kidney and liver and whether their effect is synergistic. Rats were treated orally with OTA (5 ng/kg b.w. and 50 microg/kg b.w.) and FB1 (200 ng/kg b.w. and 50 microg/kg b.w.), or their combinations. Malondialdehyde (MDA) and protein carbonyls (PCs) concentration in kidney was affected with lower dose of OTA than in liver (p<0.05). FB1 did not affect MDA and PCs concentrations in the liver, while in the kidney both FB1 doses increased MDA concentration (p<0.05). The combination of the lower doses of OTA+FB1 increased the MDA and PCs concentration both in the liver and the kidney, compared to controls and animals treated with respective doses of mycotoxins (p<0.05). The combinations of mycotoxins reduced the catalase activity only in the kidney when compared to controls (p<0.05). In contrast to the increased kidney concentrations of MDA and PCs even with very low doses of OTA and FB1, the activity of catalase and SOD does not change. Combinations of OTA+FB1 affected almost all parameters, which indicates their potential to produce oxidative damage. 相似文献
59.
Climate change, rising oil prices and concerns about future energy supplies have contributed to a growing interest in using biomass for energy purposes. Several studies have highlighted the biophysical potential of biofuel production on the African continent, and analysts see Mozambique as one of the most promising African countries. Favorable growing conditions and the availability of land, water and labor are mentioned as major drivers behind this potential. Moreover, the potential of biofuel production to generate socio-economic benefits is reflected in the government’s policy objectives for the development of the sector, such as reducing fuel import dependency and creating rural employment. This article provides an overview of biofuel developments in Mozambique and explores to what extent reality matches the suggested potential in the country. 相似文献