نتایج جستجو برای: and water quality as environmental indicators
تعداد نتایج: 17551394 فیلتر نتایج به سال:
introduction acetic acid bacteria are large group of obligate aerobic gram negative bacteria with the ability to oxidize ethanol to acetic acid (1). they are widely distributed in natural habitats and classified in family acetobacteraceae. members of this family are useful in industrial production of vinegar(2). acetic acid bacteria (aab) can use substrates as glucose, ethanol, lactate or glyc...
benthic macroinvertebrates in river are useful indicators for adverse impacts on the catchment and river ecosystems. these organisms integrate many ecological processes in catchment scale. in this study several single and multi metric biotic indices were used based on macroinvertebrates in order to evaluate the water quality of jajrood river. macroinvertebrates as well as water samples were col...
Today's competitive world has led managers to shift from traditional management to scientific management. Supply chain management is one of key issues in industries because, considering a high number of competitors in today's competitive world, competition has been extended from company level to the level of competition on their supply chain. For any organization seeking to achieve its goals in...
this thesis is about the effect of self-confidence and educational motivation on oral translation quality.
since its introduction in 1959, translation quality assessment (tqa) has been among the most addressed research topics in translation studies. during recent years, there has been a crucial increase on the study of tqa. various methods have come on scene. although these methods are based on scientific theories, most of them have remained at the level of theory. juliane house’s model is among tho...
introductionhistoric cities and neighbourhoods in iran couldn’t adjust themselves to quick changes of the recent decades andhave lost their quality in many aspects. regardless of different cultural, economic and social conditions, newneighbourhoods have been formed next to old areas of the cities. although these new areas welcom ed newfunctions, they couldn’t provide suitable environments for t...
Introduction One of the major and fundamental issues in the field of spatial planning is balanced development, which can be raised in the form of balanced development of sectors or regions. In line with the social justice policy, as the central aim of the countrychr('39')s development plans, it is necessary to study the situation of different regions in terms of distribution and the extent of ...
asymmetric membranes are widely used in many industrial membrane separation processes. the major advantage of membrane filtration over the conventional process is its ability to remove a wider spectrum of particles without using any chemicals. hollow fiber configuration offer many advantages over flat-sheet or tubular membranes. the spinning process of hollow fiber may look simple, yet it is te...
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