نتایج جستجو برای: visual minteq
تعداد نتایج: 359682 فیلتر نتایج به سال:
In autumn 2001, a full-scale test road was built with municipal solid waste incineration (MSWI) bottom ash at the Dåvamyran landfill, Umeå, Northern Sweden. Leachates were collected from asphalted sections with either bottom ash or gravel as filling material. In this research, 12 months of ash leachate sampling were evaluated with respect to emissions of contaminants such as trace metals and ch...
background. the color masking ability of a restoration plays a significant role in coveringa discolored substructure; how-ever, this optical property of zirconia ceramics has not been clearly determined yet. the aim of this in vitro study was to evaluate the color masking ability of a zirconia ceramic on substrates with different values. methods. ten zirconia disk specimens,0.5 mm in thickness ...
چکیده ندارد.
urban landscapes form the main parts of the city. one of these spaces is urban streets, in whichsocial interactions and urban vitality reach its maximum quality and quantity. one of the principles and properties ofurban landscape design is its intelligibility. a viewer who takes a look at an intelligible city and knows it can attract newemotional manifestations of city without damaging its orig...
purpose: to determine the prevalence and causes of blindness and low vision in yazd provice in 2008. methods: a population-based cross-sectional study was performed on inhabitants of in yazd province in 2008. using multistage cluster sampling, sample size was calculated based on the distribution of the total population of yazd province derived from national census and estimated rates of blindne...
background: adverse effect of sun rays mainly uv ray on the human eye documented and protection of eyes is necessary using different methods such as, sun glasses. sunglasses are designed in different colors. the aim of this study was evaluation of the effect of different colors of sunglasses on the visual acuity, contrast sensitivity, stereopsis and color vision. methods: 81 normal subjects wer...
غلظت بور در در آب آبیاری نقش مهمی را بر ویژگی های کمی وکیفی گیاهان ایفا می کند. مرز بین کمبود و سمیت بور در خاک نزدیک به هم است. فن آوری های متعددی برای حذف بور از آب های آلوده اریه شده است لیکن اکثر روش ها به هزینه های بالا و مواد شیمیایی زیاد نیاز دارند. اخیراً، جاذب های کم هزینه ای مانند کانی های رسی طبیعی و اصلاح شده، برای حذف بور از آب با استفاده از روش های جذب سطحی به کار گرفته شده است. مط...
منطقه ی مورد مطالعه، منطقه ی معدنی کوه زر در بخش مرکزی کمربند ولکانیکی- پلوتونیکی خواف- بردسکن واقع در 35 کیلومتری غرب تربت حیدریه در استان خراسان رضوی قرار دارد. جهت استخراج طلا از سنگ معدن زرمهر، از فرآیند سیانوراسیون (cyanidation) استفاده می شود. استفاده از سیانید در معدن زرمهر یک مسئله ی مهم زیست محیطی است. در این مطالعه تعداد 10 نمونه از پساب کارخانه ی فرآوری زرمهر برداشت شد و غلظت سیانید ...
abstract planting of olive (olea europaea l.) tree due to salt and drought tolerance and ever green habit increasingly is considered in urban landscape in recent years. the low resistance to cold has been a major problem in using this tree in temperate and cold zones. so, determination of frost resistance cultivars is one of the important measures for use of this tree in urban landscape. to eva...
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