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排序方式: 共有687条查询结果,搜索用时 15 毫秒
681.
Tatiana V. Antipova Valentina P. Zhelifonova Kirill V. Zaitsev Polina M. Nedorezova Alexander M. Aladyshev Alla N. Klyamkina Sergey V. Kostyuk Anastasiya A. Danilogorskaya Anatoly G. Kozlovsky 《Journal of Polymers and the Environment》2018,26(12):4350-4359
This work assessed biodegradation, by Aspergillus, Fusarium, Penicillium and Parengyodontium fungi, of four samples of poly-ε-caprolactone (PCL), three samples of poly-l-lactide (PLA) and one sample of poly-d,l-lactide (DL-PLA) produced by ring-opening polymerization initiated by aluminium complexes of corresponding lactones. Mesophilic fungal strains actively biodegrading PCL (F. solani) and PLA (Parengyodontium album and A. calidoustus) were selected. The rate of degradation by the selected fungi was found to depend on the physicochemical and mechanical properties of the polymers (molecular weight, polydispersity, crystallinity). The most degradable poly-ε-caprolactone sample was shown to have the lowest molecular weight; the most biodegradable polylactide DL-PLA had the lowest crystallinity. Mass spectral analysis of biodegraded polymer residues showed PCL to be degraded more intensively than PLA. It is established that in the case of Parengyodontium album the colonization of the films of polypropylene composites with DL-PLA is observed, which will undoubtedly contribute to their further destruction under the influence of abiotic factors in the environment. 相似文献
682.
Moges Desalew Meseret Kmoch Alexander Bhat H. Gangadhara Uuemaa Evelyn 《Regional Environmental Change》2020,20(1):1-13
Regional Environmental Change - Donors, governments, non-government organisations and humanitarian agencies are increasingly investing in disaster risk reduction (DRR) but there is limited... 相似文献
683.
684.
Seymour Colleen L. Gillson Lindsey Child Matthew F. Tolley Krystal A. Curie Jock C. da Silva Jessica M. Alexander Graham J. Anderson Pippin Downs Colleen T. Egoh Benis N. Ehlers Smith David A. Ehlers Smith Yvette C. Esler Karen J. O’Farrell Patrick J. Skowno Andrew L. Suleman Essa Veldtman Ruan 《Ambio》2020,49(6):1211-1221
Ambio - A horizon scan was conducted to identify emerging and intensifying issues for biodiversity conservation in South Africa over the next 5–10 years. South African biodiversity... 相似文献
685.
Schröter Matthias Kraemer Roland Remme Roy P. van Oudenhoven Alexander P. E. 《Ambio》2020,49(5):1100-1113
Ambio - Ecosystem service assessments rarely consider flows between distant regions. Hence, telecoupling effects such as conservation burdens in distant ecosystems are ignored. We identified... 相似文献
686.
Dröge Janis Moussaoui Ibrahim El Klingelhöfer Doris Held Hannelore Groneberg David. A. Verhoff Marcel A. Plenzig Stefanie 《Environmental science and pollution research international》2022,29(40):60519-60530
Environmental Science and Pollution Research - Particulate matter emitted during autopsies can serve as a vector for numerous viruses or bacteria and can lead to infections. Reducing the exposure... 相似文献
687.
Nicholas S. Gladstone Matthew L. Niemiller Benjamin Hutchins Benjamin Schwartz Alexander Czaja Michael E. Slay Nathan V. Whelan 《Conservation biology》2022,36(1):e13722
Many taxonomic groups successfully exploit groundwater environments and have adapted to a subterranean (stygobiotic) existence. Among these groups are freshwater gastropods (stygosnails), which represent a widespread and taxonomically diverse component of groundwater ecosystems in North America. However, owing to sampling difficulty and lack of targeted study, stygosnails remain among the most understudied of all subterranean groups. We conducted a literature review to assess the biodiversity and geographic associations of stygosnails, along with the threats, management activities, and policy considerations related to the groundwater systems they inhabit. We identified 39 stygosnail species known to occur in a range of groundwater habitats from karst regions in the United States and Mexico. Most stygosnails exhibit extreme narrow-range endemism, resulting in a high risk of extinction from a single catastrophic event. We found that anthropogenically driven changes to surface environments have led to changes in local hydrology and degradation of groundwater systems inhabited by stygosnails such as increased sedimentation, introduction of invasive species, groundwater extraction, or physical collapse of water-bearing passages. Consequently, 32 of the 39 described stygosnail species in the United States and Mexico have been assessed as imperiled under NatureServe criteria, and 10 species have been assessed as threatened under International Union for Conservation of Nature criteria. Compared with surface species of freshwater snails, stygosnail conservation is uniquely hindered by difficulties associated with accessing subterranean habitats for monitoring and management. Furthermore, only three species were found to have federal protection in either the United States or Mexico, and current laws regulating wildlife and water pollution at the state and federal level may be inadequate for protecting stygosnail habitats. As groundwater systems continue to be manipulated and relied on by humans, groundwater-restricted fauna such as stygosnails should be studied so unique biodiversity can be protected. 相似文献