全文获取类型
收费全文 | 3691篇 |
免费 | 28篇 |
国内免费 | 17篇 |
专业分类
安全科学 | 83篇 |
废物处理 | 233篇 |
环保管理 | 284篇 |
综合类 | 447篇 |
基础理论 | 797篇 |
环境理论 | 3篇 |
污染及防治 | 1255篇 |
评价与监测 | 358篇 |
社会与环境 | 266篇 |
灾害及防治 | 10篇 |
出版年
2023年 | 34篇 |
2022年 | 102篇 |
2021年 | 91篇 |
2020年 | 46篇 |
2019年 | 68篇 |
2018年 | 123篇 |
2017年 | 114篇 |
2016年 | 174篇 |
2015年 | 110篇 |
2014年 | 184篇 |
2013年 | 346篇 |
2012年 | 212篇 |
2011年 | 282篇 |
2010年 | 173篇 |
2009年 | 159篇 |
2008年 | 213篇 |
2007年 | 220篇 |
2006年 | 161篇 |
2005年 | 150篇 |
2004年 | 107篇 |
2003年 | 91篇 |
2002年 | 93篇 |
2001年 | 81篇 |
2000年 | 52篇 |
1999年 | 33篇 |
1998年 | 20篇 |
1997年 | 18篇 |
1996年 | 9篇 |
1995年 | 26篇 |
1994年 | 21篇 |
1993年 | 13篇 |
1992年 | 16篇 |
1991年 | 13篇 |
1990年 | 14篇 |
1989年 | 8篇 |
1988年 | 11篇 |
1987年 | 5篇 |
1983年 | 4篇 |
1967年 | 5篇 |
1966年 | 4篇 |
1965年 | 4篇 |
1964年 | 11篇 |
1963年 | 9篇 |
1962年 | 11篇 |
1960年 | 8篇 |
1958年 | 13篇 |
1957年 | 5篇 |
1956年 | 5篇 |
1943年 | 3篇 |
1940年 | 3篇 |
排序方式: 共有3736条查询结果,搜索用时 357 毫秒
891.
Fermín C. Iturriza 《Die Naturwissenschaften》1967,54(21):565-565
892.
893.
894.
895.
896.
897.
898.
899.
Surakka J Johnsson S Rosén G Lindh T Fischer T 《Journal of environmental monitoring : JEM》1999,1(6):533-540
UV-curable acrylates are used increasingly for coating wood surfaces in the furniture industry. One of the active components, tripropylene glycol diacrylate (TPGDA), is known to be both an allergen and irritant to the skin. Methods to measure dermal exposure to skin irritants and allergens, such as acrylates, are insufficient for exposure assessment and there is none for this compound. The aim of this investigation was to develop a skin and surface sampling method, based on tape stripping, and a gas chromatographic method for quantitative analysis for assessing occupational skin exposure to multifunctional acrylates. Twelve adhesives were tested for their efficiency to remove TPGDA and UV-coating from a glass surface, the skin of guinea pigs and human volunteers employing the tape-stripping method in order to find the best performing tape. Variables that affect removal efficiency such as the applied dose and its retention time on the skin, tape adhesion time on the skin, and the number of strippings required to detect the contaminant from the skin were studied. Fixomull tape performed the best during sampling and analysis and had the most consistent removal efficiencies for the studied substances. The average removal efficiency with a single stripping at the 2 microliters TPGDA exposed skin sites was 85% (RSD = 14.1), and for UV-resin exposed sites 63% (RSD = 20.2). The results indicated that this method can be used for measuring dermal exposure to multifunctional acrylates efficiently, accurately, and economically. This method provides a sensitive and powerful tool for the assessment of dermal exposure to multifunctional acrylates both from the skin and from other contaminated surfaces in occupational field settings. 相似文献
900.
Gómez-Ariza JL Giráldez I Morales E Ariese F Cofino W Quevauviller P 《Journal of environmental monitoring : JEM》1999,1(2):197-202
The stability of both tributyltin (TBT) and triphenyltin (TPT) in water, sediment, oysters and cockles was studied over a period of 18 months using several storage conditions. Butyltins were stable in unacidified sea-water stored in polycarbonate bottles in the dark at 4 degrees C for 7 months, but half of the TBT concentration was lost after 540 d. A comparable preservation time was achieved for butyltins stored on C18 cartridges at room temperature. However, phenyltins extracted from sea-water were stable for only 60 d stored on cartridges and even more pronounced losses (about 90% after 540 d) occurred when they were stored in either polycarbonate or Pyrex glass bottles. Losses of organotins were observed in sediments after air drying and pasteurization treatments using a freeze-dried sediment as a comparator, whereas both butyltin and phenyltin species remained stable in sediments stored at -20 degrees C for the 18 months tested, irrespective of the treatment used for stabilization. Air drying followed by pasteurization was shown to be superior to other treatments for the stabilization of organotin compounds in sediments stored at higher temperatures, but 30% of TBT was lost after 540 d at 25 degrees C. Finally, butyltins were stable in both frozen cockles and oysters in the dark over a 7 month period and in freeze-dried samples stored at 4 degrees C for 5 months, but TBT losses of about 70% were observed after 540 d. 相似文献