نتایج جستجو برای: meldrums acid
تعداد نتایج: 747443 فیلتر نتایج به سال:
background: endometriosis, a common chronic inflammatory disorder, is defined by the atypical growth of endometrium- like tissue outside of the uterus. secretory phospholipase a2 group iia (spla2-iia) and fatty acid binding protein4 (fabp4) play several important roles in the inflammatory diseases. objective: due to reported potential anti-inflammatory effects of ω-3 and ω-6 fatty acids, the pu...
objective: this study aimed to assess the destructive effects of citric acid, lactic acid and acetic acid produced from the fermentation of foods on primary teeth enamel. methods: this in vitro, experimental study was conducted on 24 sound primary teeth. the teeth were polished with a fine abrasive paper under running water. tooth pieces measuring 3 × 4 × 3mm were cut out of the teeth and sto...
we describe here a suitable approach for the synthesis of n-unsubstituted monocyclic b-lactams under mild reaction conditions by the annelation of imines with substituted acetylchlorides. in this method the reaily available phtalimidoacetyl chloride were allowed to react with - dibenzylideneiminotoluene (hydrobenzamide) in the presence of an equimolar amount of triethylamine in refluxing toluen...
در این پروژه لیگاند آمینواسید: 3-((2-diethylamino)ethyl)amino)-2-methyl propanoic acid = {hl} با استفاده از نسبت مولی برابر از n وn- دی اتیل اتیلن دی آمین و متااکریلیک اسید و درحلال استونیتریل سنتز گردید. سپس کمپلکس هایی از فلز مس(ii) با فرمول های: [0.3[cul2 [culcl] 4 [culncs] hclo4.[cuhlclo4] (x=cl, br, no3)[culx] همچنین کمپلکس هایی از فلز نیکل(ii) با فرمول های: 5h2o .[nilcl] [nilclo4...
Objective: Polyphenol oxidase or PPO (EC 1.14.18.1) is considered the enzyme responsible for quality deterioration and browning in different fruits during postharvest period. The objective of this study was to evaluate the antibrowning (inhibition of polyphenol oxidase activity) effect of Cysteine, Ascorbic acid, citric acid, kojic acid and glycine at two different pH (6 and 7) in hawthorn. Me...
Background and objectives: Nigella sativa seeds have shown to possess anti-inflammatory, anti-oxidant, trenquillizer, chemopreventive and anti-neoplastic effects. Besides, they areused as nutritional flavoring agents. We have investigated the protective effects of N. sativa seeds hexane extract and active principles against methyl phenyl pyridine (MP...
Objective: This study aimed to assess the destructive effects of citric acid, lactic acid and acetic acid produced from the fermentation of foods on primary teeth enamel. Methods: This in vitro, experimental study was conducted on 24 sound primary teeth. The teeth were polished with a fine abrasive paper under running water. Tooth pieces measuring 3 × 4 × 3mm were cut out of the teeth and s...
در این پروژه تاثیر حرارت و نوع حرارت (حرارت خشک، بخار اشباع و آب داغ) بر روی رفتار رنگرزی پارچه نایلونی(نایلون 6) با رنگهای اسیدی و مستقیم مورد بررسی قرار گرفت. پارچه ها در حرارت خشک در دما های 160، 170، 185 و 200 درجه ، برای حرارت در بخار اشباع دما های 100 و 120 و برای آب داغ 130، 140 و 150 انتخاب شد. برای رنگرزی از هر گروه دو رنگ در کلاس های متفاوت استفاده شد : رنگ c.i. acid orange 7 از گروه ...
in the present study, sulfuric acid was used for artemia cysts decapsulation. cysts of artemia franciscana were hatched out in regular manner or following hypochlorite or acid decapsulation. two acid concentrations (1 and 5%), three acid immersion times (10, 30 and 50 min) were used and hatching rates were recorded after 15, 18 and 24 h incubation. hatching rates increased but hatching time dec...
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