نتایج جستجو برای: ecological values
تعداد نتایج: 599914 فیلتر نتایج به سال:
Aims : To develop a consistent ecological indicator value system for Europe five of the main plant niche dimensions: soil moisture (M), nitrogen (N), reaction (R), light (L) and temperature (T). Study area (and closely adjacent regions). Methods We identified 31 systems vascular plants in that contained assessments on at least one aforementioned dimensions. rescaled values each dimension to con...
BACKGROUND Although the Netherlands currently has its own procedure for evaluating chemical compounds and setting occupational exposure limits (OELs), most of these limits were originally adopted in the 1970s from threshold limit values (TLVs) set by the American Conference of Governmental Industrial Hygienists (ACGIH). However, beginning in the late 1980s, criticism about non-scientific consid...
Trace elements are the common pollutants of soils, sediments and street dust in the urban environment, which pose a potential threat to public health. Therefore, this study was conducted to potential ecological risk assessment of As, Cd, Cr, Cu, Pb, Ni and Zn in street dust collected from industrial, commercial and residential areas of city of Hamedan in 2019 using ecotoxicological criteria. Ma...
Marine benthic macrophytes (seaweed and seagrasses) are key structural and functional components of some of the most productive ecosystems of the world. They absorb nutrients through their surface directly from the marine environment and thus they are very important biological elements for the estimation of ecological status, representing reliable indicators of coastal waters. The aim of this s...
The present study focuses mainly on the relationship between psychological constructs and ecological behaviour. Empirical analysis links personal values, ecological beliefs, consequences of environmental conditions, denial of ecological obligation, environmental control, personal norms and environment protection behaviour. Survey data from a path analysis of a Spanish sample of 403 individuals ...
Using a function algebra characterization of exponential time due to Monien 5], in the style of Bellantoni-Cook 2], we characterize exponential time functions of linear growth via a safe course-of-values recursion scheme.
This article is a critical review of some of the methods that have been used for the sampling, analysis, and monitoring of vapor-phase toluene diisocyanate (TDI). Only some of the methods that have received relatively widespread application have been addressed in this article. This review includes a "tutorial style" discussion of basic definitions and basic principles and procedures of quality ...
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