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Karin lreton 《生态毒理学报》1999,21(1)
采取少数几个小的志愿步骤 南非的志愿举措大部分是由于公司经营所在的不确定法规环境的结果.环境立法的确存在,但过去执法不力,这部分地由于工业界和政府都认为增长和就业机会是与环境管理相冲突的,而且前者优于后者.希望随着可持续发展的信息得到更好的理解,那些冲突类别将成为过去的事情. 相似文献
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175.
Decker Karin L. Fink Michelle M. Rondeau Renée J. 《Regional Environmental Change》2017,17(8):2467-2475
Regional Environmental Change - Climate change vulnerability assessment is a key first step for land managers attempting to address the potential impacts of future climatic conditions on important... 相似文献
176.
Gail Stetten Ph.D. Karin J. Blakemore Anne M. Courter Cathleen A. Coss Ethylin Wang Jabs 《黑龙江环境通报》1992,12(2):83-91
In situ hybridization using a series of alphoid DNA probes has demonstrated the origin of two small accessory mosaic marker chromosomes ascertained from 1079 amniocenteses. These markers appeared to be de novo, derived from acrocentric chromosomes, and identical by traditional cytogenetic staining (G, Q, C, AgNOR, Hoechst-distamycin). Molecular characterization showed that one marker had originated from chromosome 14, the other from chromosome 22. Clinical outcome in both cases was normal. 相似文献
177.
Diane Van Opstal Karin E.M. Diderich Marieke Joosten Lutgarde C.P. Govaerts Joke Polak Marjan Boter Jasper J. Saris Wai Yee Cheung Stefanie van Veen Robert van de Helm Attie T.J.I. Go Maarten F.C.M. Knapen Dimitri N.M. Papatsonis Anneke Dijkman Femke de Vries Robert-Jan H. Galjaard Lies H. Hoefsloot Malgorzata I. Srebniak 《黑龙江环境通报》2018,38(12):911-919
178.
Physical characteristics and quantitative elemental composition of PM and residual ash produced from sugarcane leaves (SCL) combustion were investigated using TEM-EDS compared with forest leaves (FRL). SEM-EDS was used to analyze the microstructure and chemical composition of biomass raw leaves and PM. XRD analysis was also performed to investigate the characterization of the crystalline nanostructure, structure of PM, and residual ash compared to the TEM image processing method. The oxidation kinetics of biomass raw materials, PM, and residual ash were investigated by TGA. The morphology of fine and ultrafine agglomerate structure of SCL soot and residual ash are not significantly different from the FRL soot and residual ash. The average diameter sizes of single primary nanoparticles of SCL and FRL soot are approximately 37 nm and 35 nm, while the sizes of residual ash are about 18 nm and 22 nm, respectively. The single primary nanoparticles of soot are mainly composed of curve line crystallites of carbon fringes, while residual ash is composed of straight-line lattice fringes. The average fringe lengths of SCL and FRL soot are about 1.25 nm and 1.04 nm from the outer shell and 0.89 nm and 0.74 nm from the inner core. The interlayer spacing of curve line carbon fringes of SCL and FRL soot is approximately 0.359 nm and 0.362 nm by the TEM image analysis and it was matched with XRD analysis. The biomass PMs are mainly composed of soot, Si, Ca, and K compounds: SiO2, CaCO3, and KCl. 相似文献
179.
Influence of nutrient levels on uptake and effects of mercury, cadmium, and lead in water spinach 总被引:1,自引:0,他引:1
In Southeast Asia the aquatic macrophyte water spinach (Ipomoea aquatica Forsk.) is a popular vegetable that is cultivated in freshwater courses. These often serve as recipients for domestic and other sorts of wastewater that often contain a variety of pollutants, such as heavy metals. In addition, fertilizers are frequently used where water spinach is cultivated commercially for the food market. To estimate the importance of ambient nutrient concentrations for accumulation of mercury (Hg), cadmium (Cd), and lead (Pb) in water spinach, plants were exposed to nutrient solutions of different strength and with varying metal concentrations. Metal-induced toxic effects, which might possibly affect the yield of the plants, were also studied. The lower the nutrient strength in the medium was, the higher the metal concentrations that accumulated in the different plant parts and the lower the metal concentration in the medium at which metal-induced toxic effects occurred. Accordingly, internal metal concentrations in the plants were correlated to toxic effects. Plants exposed to metals retained a major proportion of the metals in the roots, which had a higher tolerance than shoots for high internal metal concentrations. 相似文献
180.
Structural and functional diversity of microbial communities from a lake sediment contaminated with trenbolone, an endocrine-disrupting chemical 总被引:2,自引:0,他引:2
Radl V Pritsch K Munch JC Schloter M 《Environmental pollution (Barking, Essex : 1987)》2005,137(2):345-353
Effects of trenbolone (TBOH), a hormone used in cattle production, on the structure and function of microbial communities in a fresh water sediment from a lake in Southern Germany were studied in a microcosm experiment. The microbial community structure and the total gene pool of the sediment, assessed by 16S rRNA/rDNA and RAPD fingerprint analysis, respectively, were not significantly affected by TBOH. In contrast, the N-acetyl-glucosaminidase activity was almost 50% lower in TBOH treated samples (P<0.05). Also, the substrate utilization potential, measured using the BIOLOG system, was reduced after TBOH treatment. Interestingly, this potential did not recover at the end of the experiment, i.e. 19 days after the addition of the chemical. Repeated application of TBOH did not lead to an additional reduction in the substrate utilization potential. Overall results indicate that microbial community function was more sensitive to TBOH treatment than the community structure and the total gene pool. 相似文献