نتایج جستجو برای: 15 and 3 g l
تعداد نتایج: 17286298 فیلتر نتایج به سال:
در این پژوهش ابتدا پودر هیدروکسی آپاتیت با روش شیمیایی با ابعادnm5±30 سنتز شد. سپس پوشش تک جزئی چیتوسان با استفاده از الکل های مختلف با غلظت g/l5/0 چیتوسان ایجاد شد. برای ساخت محلول های تک جزئی چیتوسان، چیتوسان به همراه اسید استیک در مخلوط الکل و آب با مقادیر مختلف آب(75،50،20،15،10،5و100%)حل شد. پوشش های بدست آمده از لحاظ وزن،میکروساختار، چسبندگی و مقاومت به خوردگی بررسی شده و مقدار آب بهینه د...
Studies show that Oryza sativa L. contains a structure named β-glucan with anti cancer properties. In the present study, a tissue culture for rice was carried out and β-glucan content was measured under various sugar and vitamin levels in basic MS medium. Seeds of Hashemi cultivar were cultured on MS medium. Two plant hormones, namely, 2,4-D (0, 1, 1.5, 2 and 3 mg/l) and kinetin (0,0.5, 1, and ...
Background and Purpose: Patulin is one of the important mycotoxins, produced by a wide range of molds, including Penicillium, Aspergillus, and Bysochlamys. Patulin is mainly found in the rotten parts of fruits and vegetables, such as apples, pears, peach, apricots, and grapes. Currently, the Codex Alimentarius and Food and Drug Administration have recommended a maximum level of 50 μg/L patul...
فرض کنیم g یک گروه متناهی از مرتبه |g|= p_1^(?_1 ) p_2^(?_2 )…p_n^(?_n ) باشد که p_i اعداد اول هستند و p_1<p_2<?<p_n است. یکی از معروف ترین گرااف های مرتبط با با g گراف اول آن است که با ?(g) یا gk(g) نمایش داده شود. این گراف به صورت زیر ساخته می شود. مجموعه رئوس آن ?(g)={p_1,p_2,…,p_n } و دو راس p_i و p_j که i?j مجاورند (با یال به هم وصل می شوند) اگر و تنها اگر g شامل عضوی از مرتبه p_i p_j باشد...
Let G=(V,E) be a simple graph with n vertices and m edges, P(G,k) the chromatic polynomial of G, P(G,L) number L-colorings G for any k-assignment L. In this article, we show that when k≥m−1≥3, P(G,L)−P(G,k) is bounded below by ((k−m+1)kn−3+(k−m+3)c3kn−5)∑uv∈E|L(u)∖L(v)|, where c≥(m−1)(m−3)8, in particular, if K3-free, then c≥(m−22)+2m−3. Consequently, P(G,L)≥P(G,k) whenever k≥m−1.
background wastewater effluent in hospitals has been increasing during the recent decades due to developments in medical services and products. objectives this study aimed to investigate the qualitative parameters of effluent wastewater in hospitals affiliated to babol university of medical sciences (bums). materials and methods four hospitals were included and their wastewater effluent was stu...
Background: Drugs, especially antibiotics, are one of the serious problems of modern life and the main pollution sources of the environment, especially in the last decade, which are harmful to human health and environment. The aim of this study was to investigate the removal of penicillin G from aqueous solutions using single-walled and multi-walled carbon nanotubes. Methods: In this study, t...
fluctuations in salinity impose stress on the physiology of the exposed fish population and can modify their structure. it has been noted that changes in blood characteristics and plasma levels serve as the primary link between environmental change and physiological response (mccormick, 2001). ninety healthy adult cyprinuscarpio (c. carpio) were randomly divided into five groups and kept in sal...
We examine the d i s to r t ion of a simple l inear ly polarised Gaussian beam on r e f l ec t i on from an of f -axis e l l i p s o i d a l m i r r o r . E x p r e s s i o n s a r e d e r i v e d f o r t h e d i s t o r t e d r e f l e c t e d f i e l d s and f o r t h e l o s s of power i n t o h i g h e r o r d e r and c r o s s p o l a r i s e d modes .
Fluctuations in salinity impose stress on the physiology of the exposed fish population and can modify their structure. It has been noted that changes in blood characteristics and plasma levels serve as the primary link between environmental change and physiological response (McCormick, 2001). Ninety healthy adult Cyprinuscarpio (C. carpio) were randomly divided into five groups and kept in sal...
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