全文获取类型
收费全文 | 202篇 |
免费 | 2篇 |
专业分类
安全科学 | 1篇 |
废物处理 | 1篇 |
环保管理 | 4篇 |
综合类 | 103篇 |
基础理论 | 47篇 |
环境理论 | 1篇 |
污染及防治 | 32篇 |
评价与监测 | 8篇 |
社会与环境 | 7篇 |
出版年
2021年 | 3篇 |
2019年 | 2篇 |
2018年 | 5篇 |
2017年 | 5篇 |
2016年 | 2篇 |
2015年 | 7篇 |
2014年 | 10篇 |
2013年 | 4篇 |
2012年 | 9篇 |
2011年 | 6篇 |
2010年 | 10篇 |
2009年 | 5篇 |
2008年 | 17篇 |
2007年 | 7篇 |
2006年 | 2篇 |
2005年 | 4篇 |
2004年 | 3篇 |
2002年 | 5篇 |
2001年 | 5篇 |
1999年 | 8篇 |
1996年 | 2篇 |
1995年 | 3篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1990年 | 2篇 |
1981年 | 2篇 |
1980年 | 3篇 |
1966年 | 3篇 |
1965年 | 3篇 |
1963年 | 2篇 |
1962年 | 4篇 |
1961年 | 2篇 |
1960年 | 2篇 |
1958年 | 4篇 |
1957年 | 3篇 |
1954年 | 6篇 |
1952年 | 1篇 |
1951年 | 1篇 |
1950年 | 2篇 |
1946年 | 1篇 |
1944年 | 1篇 |
1943年 | 1篇 |
1937年 | 1篇 |
1936年 | 1篇 |
1935年 | 2篇 |
1934年 | 2篇 |
1924年 | 1篇 |
1920年 | 2篇 |
1916年 | 1篇 |
1913年 | 2篇 |
排序方式: 共有204条查询结果,搜索用时 15 毫秒
41.
Drozdova Irina Machs Eduard Kalimova Irina Terentyeva Larisa Bech Jaume Roca Núria Latypov Iscander 《Environmental geochemistry and health》2021,43(4):1617-1628
Environmental Geochemistry and Health - Accumulations of potentially toxic metals were investigated in soils and five North Caucasian Alyssum species from metalliferous areas and non-metalliferous... 相似文献
42.
Ocean acidification (OA) and the biological consequences of altered seawater chemistry have emerged as a significant environmental
threat to healthy marine ecosystems. Because a more acidic ocean interferes with fixation of calcium carbonate to form shells
or calcified skeletons, future ocean chemistry may significantly alter the physiology of calcifying marine organisms. These
alterations may manifest themselves directly in the calcification process, or have synergistic effects with other environmental
factors such as elevated temperatures. New tools permit us to explore subtle changes in gene expression patterns in response
to environmental conditions. We raised sea urchins (Strongylocentrotus franciscanus) under conditions simulating future atmospheric CO2 levels of 540 and 970 ppm. When larvae raised under elevated CO2 conditions were subjected to 1-h acute temperature stress, their ability to mount a physiological response (as measured by
expression of the molecular chaperone hsp70) was reduced relative to those raised under ambient CO2 conditions. These results represent the first use of gene expression assays to study the effects of OA on sea urchin development.
They highlight the importance of looking at multiple environmental factors simultaneously as this approach may reveal previously
unsuspected biological impacts of atmospheric changes. 相似文献
43.
A. Tieber H. Lettner P. Bossew A. Hubmer B. Sattler W. Hofmann 《Journal of environmental radioactivity》2009
Cryoconites are airborne sediments which accumulate on the surface of glaciers. In samples of cryoconites a temperate Austrian glacier high activity concentrations of anthropogenic radionuclides were found, which stem from global and Chernobyl fallouts. Radionuclides identified were 137Cs, 134Cs, 238Pu, 239+240Pu, 90Sr, 241Am, 60Co, 154Eu, 207Bi, and 125Sb. 相似文献
44.
Vegetative buds of Cassiopea andromeda (Cnidaria, Scyphozoa) metamorphose into polyps in the presence of short synthetic peptides containing proline as the preterminal amino acid at the carboxyl terminus. In an in vivo assay, the binding of the biologically active hexapeptide 14C-dansyl-GPGGPA in buds was shown to be specific and saturable. Scatchard plot analysis of the specific binding data revealed a dissociation constant (K
D) of about 7 M. The total number of receptors was calculated to be approximately 1×1010 bud-1 under saturation conditions. In correlation with the results of prior investigations, our finding of receptor-mediated induction of metamorphosis strongly supports the hypothesis that binding of biologically active peptides to receptors leads to initiation of phosphatidylinositol breakdown and activation of protein kinase C. 相似文献
45.
46.
D. K. Hofmann 《Marine Biology》1972,14(4):341-344
Eunice siciliensis (Grube)1 is a sedentary polychaete with separate sexes; its germ cells develop only in the posterior part of the body. In March and April, females with whitish or even dark-green oocytes, males with only few spermatogonia, and individuals with no germ cells at all were discovered in the “coralligène” of the Banyuls region (European Mediterranean Sea). In august, besides immature and sexually non-differentiated worms, mature individuals of both sexes were captured: females with dark bluish-green oocytes of diameters up to 250μm, and males with milky genital segments containing spermatozoa. Soon after isolation from the substrate, these individuals performed characteristic movements with their posterior body parts, which then autotomized, and released ova and spermatozoa. Evidence is given that the anterior, atokous body parts survive in their tubes in the “coralligène” after separation from the epitokous portions, and regenerate new genetal segments. The development of gametes observed in these regenerated segments indicates the ability of E. siciliensis to reproduce more than once during its lifetime. Not only caudal, but also prostomial regeneration was observed; the formation of a (morphologically different) secondary prostomium appears to be essential for any development of germ cells in worm fragments. E. siciliensis exhibits surprising similarities in habits and in formation of an epitokous form with Eunice viridis (Gray), the “palolo” worm of the South Pacific Ocean, but nevertheless, lacks the prominent criteria of this famous species: the ventral eye spots on each genital segment in males and females, and the paired areas with brown pigmentation on the ventral side of each epitokous segment in the males. 相似文献
47.
48.
49.
50.