نتایج جستجو برای: 11 major parameters and 36 sub
تعداد نتایج: 17005496 فیلتر نتایج به سال:
چکیده با توسعه شهر نشینی و دخل و تصرف غیر مجاز در حریم رودخانه ها خسارات زیادی به رودخانه و محیط زیست اطراف آن وارده می شود. در حال حاضر بر اساس آئین نامه اصلاح شده بستر و حریم رودخانه ها، حریم کمی رودخانه که بلافاصله پس از بستر قرار می گیرد از 1 تا20 متر از منتهی الیه طرفین بستر رودخانه تعیین، که مقدار دقیق آن در هر بازه از رودخانه مشخص نیست. در کشورهای دیگر روشهای متفاوتی من جمله: درصد ریسک...
In the present work, we have synthesizedgadolinium(III) bromide, GdBr3 from the gadolinium oxide, Gd2O3 by sintering brominating with ammonium bromide, NH4Br. The influence of three main synthesis parameters (contact time, stoichiometry, and temperature) on the reaction yield was studied and optimized. This study showed that the optimum conditions...
Abstract C 6 H 11 NO 4 , monoclinic, P 2 1 / c (no. 14), a = 19.1903(7) Å, b 18.4525(6) 9.2197(3) β 95.879(1)°, V 3247.61(19) Å 3 Z 16, R gt ( F ) 0.0495, wR ref 0.1194, T 173 K.
Argentopolybasite, Ag<sub>16</sub>Sb<sub>2</sub>S<sub>11</sub>, a new member of the polybasite group
Abstract The new mineral argentopolybasite, ideally Ag 16 Sb 2 S 11 , was found at the Kremnica Au–Ag epithermal deposit, Žiar nad Hronom Co., Banská Bystrica Region, Slovakia (type locality), Šibeničný vrch near Nová Baňa, Žarnovica (cotype locality) and Arykevaam Anadyr’ District, Chukotka Autonomous Okrug, Russian Federation locality). At deposit argentopolybasite as discrete, well-developed...
differentiation among populations of the iranian teucrium polium l.was analyzed on the basis of morphological and phytochemical variability, to evaluate the level and distribution of diversity among four distant populations from arid, semi-arid, and sub-humid regions of fars province. morphological analysis included 11 characters related to the plant, leaf, and stem morphology. analyses of vari...
In recent years, studies related to the epoxidation of fatty acids have garnered much interest due rising demand for eco-friendly epoxides derived from vegetable oils. From reaction, there is a side reaction involving epoxide and water. This produces by-product – dihydroxystearic acid (C&lt;sub&gt;18&lt;/sub&gt;H&lt;sub&gt;36&lt;/sub&gt;O&lt;sub&gt;4&...
This study investigated the hydrogeochemistry and environmental water quality of rivers in Sarough watershed using the major ion chemistry and explored multivariate statistical methods for identification of processes which release the solutes in natural waters. Totally, 38 samples were collected along the main streams of the watershed. The mean concentrations of major cations (Na, K, Mg, Ca) an...
objective: the aim of this study was to determine the associates of marital relationship in mustard exposed veterans. materials and methods: two hundred ninety two married iranian mustard exposed veterans, who had been exposed to single high dose mustard gas in iraq-iran war, were assessed for marital adjustment with revised dyadic adjustment scale (rdas). census sampling was done. the patients...
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