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ROUABHI Rachid DJEBAR-BERREBBAH H DJEBAR MR 《应用与环境生物学报》2006,12(4):514-517
Harmful bugs affect food production,directly by the qualitativeor quantitative reduction of the harvests,or indirectly while servinglike vectors of several illnesses of the plants and human[1].Many chemical products are used by human for a long time inthe… 相似文献
2.
The results of analyses for polychlorodibenzofuran (PCDF) content in two samples of polychlorobiphenyl (PCB) from used electrical transformers are presented and discussed. In neither sample was there evidence for enhanced PCDF concentrations even though one of them had been subjected to overheating while in service. 相似文献
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Results of analyses of eight samples of technical pentachlorophenol conducted by three different analytical methods are presented and discussed. 相似文献
4.
Bayramin I Basaran M Erpul G Canga MR 《Environmental monitoring and assessment》2008,140(1-3):249-265
There has been increasing concern in highlands of semiarid Turkey that conversion of these systems results in excessive soil
erosion, ecosystem degradation, and loss of sustainable resources. An increasing rate of land use/cover changes especially
in semiarid mountainous areas has resulted in important effects on physical and ecological processes, causing many regions
to undergo accelerated environmental degradation in terms of soil erosion, mass movement and reservoir sedimentation. This
paper, therefore, explores the impact of land use changes on land degradation in a linkage to the soil erodibility, RUSLE-K,
in Cankiri–Indagi Mountain Pass, Turkey. The characterization of soil erodibility in this ecosystem is important from the
standpoint of conserving fragile ecosystems and planning management practices. Five adjacent land uses (cropland, grassland,
woodland, plantation, and recreational land) were selected for this research. Analysis of variance showed that soil properties
and RUSLE-K statistically changed with land use changes and soils of the recreational land and cropland were more sensitive
to water erosion than those of the woodland, grassland, and plantation. This was mainly due to the significant decreases in
soil organic matter (SOM) and hydraulic conductivity (HC) in those lands. Additionally, soil samples randomly collected from
the depths of 0–10 cm (D
1) and 10–20 cm (D
2) with irregular intervals in an area of 1,200 by 4,200 m sufficiently characterized not only the spatial distribution of
soil organic matter (SOM), hydraulic conductivity (HC), clay (C), silt (Si), sand (S) and silt plus very fine sand (Si + VFS)
but also the spatial distribution of RUSLE-K as an algebraically estimate of these parameters together with field assessment
of soil structure to assess the dynamic relationships between soil properties and land use types. In this study, in order
to perform the spatial analyses, the mean sampling intervals were 43, 50, 64, 78, 85 m for woodland, plantation, grassland,
recreation, and cropland with the sample numbers of 56, 79, 72, 13, and 69, respectively, resulting in an average interval
of 64 m for whole study area. Although nugget effect and nugget effect–sill ratio gave an idea about the sampling design adequacy,
the better results are undoubtedly likely by both equi-probable spatial sampling and random sampling representative of all
land uses. 相似文献
5.
Pugliese Lorenzo Poulsen Tjalfe G. Canga Eriona Straface Salvatore 《Environmental Fluid Mechanics》2020,20(6):1617-1636
Environmental Fluid Mechanics - A large set of experimental solute tracer breakthrough data (corresponding to more than 350 individual tracer breakthrough curves) in eight granular filter... 相似文献
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Wood samples treated with technical pentachlorophenol (PCP), technical sodium pentachlorophenoxide (NaPCP) and octachlorodibenzo-p-dioxin have been exposed outdoors for periods up to years. Analysis of extracts from the samples show that photolytic reductive dechlorination of highly chlorinated dibenzo-p-dioxins to less chlorinated isomers occurs. However there is no discernible increase in polychlorodibenzo-p-dioxin concentrations in the technical PCP treated wood presumably because further photolytic reactions and volatilisation compete effectively with the photolytic formation. There is no evidence for formation of octachlorodibenzo-p-dioxin (OCDD) in technical PCP treated wood in this study, probably because photolytic destruction and volatilisation compete effectively with formation reactions when the initial OCDD concentration is relatively high. 相似文献
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