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تعداد نتایج: 2105959 فیلتر نتایج به سال:
background & aim: the lamiaceae family is one of the largest and most distinctive families of flowering plants, with about 220 genera and almost 4000 species worldwide. the genus stachys is one of the largest representative genera of the lamiaceae family and includes about 300 species, in the subtropical and tropical regions of both hemispheres. in iran this genus is represented by 34 speci...
گونه ی آویشن کوهی thymus kotschyanus boiss. & hohen. ، گیاهی علفی و پایا متعلق به تیره نعناع است که در بعضی از مناطق ایران از جمله ارتفاعات استان آذربایجانغربی به صورت وحشی می روید. درتحقیق اخیر، تغییرات کمّی وکیفی اسانس جمعیت های وحشی ومزروعی t. kotschyanus گزارش شده است. بخش های هوایی این گیاهان در مرحله ی اوایل گلدهی (20%گل دهی) از رویشگاه های طبیعی(t.k-w1= گردنه ی قوشچی وt.k-w2= دره ی شهدای ...
due to the uncensored use of pesticides in the agricultural regions of lebanon, the contaminationrisks of drinking water by organic residues increase periodically in planting seasons. no previous work havebeen considered in north lebanon plain concerning pesticide pollution though it is the second agriculturalzone in lebanon with an excessive activity. in this context, the aim of this study was...
many of the persistent organic pollutants (pops) with endocrine disrupting properties are monitored regularly by risk assessors with limited resources, where analytical procedures are usually laborious, expensive, and not ecofriendly. moreover, these analyses were frequently advanced aiming one class of pollutants, consequently inefficient to correspond the demand of monitoring a quickly rising...
background & aim:zea mays leaf used traditionally in ibibio ethno medicine in southern nigeria to treat malaria and other inflammatory diseases. these anti-inflammatory and analgesic properties were evaluated against experimentally induced inflammation and pains using standard models. experimental: the effects of ethanol leaf extract of zea mays (170 -510 mg/kg) on experimentally induced inflam...
in this work the chemical composition and antimicrobial activity of pelargonium roseum leaves essential oil that grown in southwest of iran were determined. the hydrodistilled volatile components were identified by gc/ms analysis. a total of 33 components have been identified in the oil, representing 99.38% of the total oil and citronellol (44.63%), citronellyl formate (14.22%), isomenthon (6.3...
objective(s):various species of genus trigonella are important from medical and culinary points of view. the essential oil of trigonella torbatejamensis ranjbar as an endemic plant in iran has not been studied previously. the essential oil of this plant was analyzed by different methods for identification of its components. materials and methods: the essential oil composition of aerial parts of...
abstract chemical components of narcissus (narcissus tazetta l.) essential oil investigated under farming and natural habitat conditions in south khorasan province. the essential oil was obtained using solvent extraction method. after purification, the oil was analyzed by capillary gc and gc/ms. 12 compnents making 82/82% of total oil in farm sample and 13 components making 63/86% of total oil ...
نفتالن یکی از انواع ترکیبات نفتی و سمی است که خطرات زیادی را برای محیط زیست فراهم می کند. سیانوباکتریleptolyngbya به عنوان یک سیانوباکتری تحمل کننده و تجزیه کننده موثر هیدروکربن های آروماتیک که می توانند در محیط ایجاد سمیت کنند، شناخته شده است. به منظور بررسی پاسخ های فیزیولوژیک و قدرت تجزیه زیستی، سیانوباکتری leptolyngbya sp. isc 25 از مناطق آلوده نفتی برداشت و جداسازی گردید (نتایج حاصل از برر...
background and objectives: many members of the amaryllidaceae are regarded as toxic. the toxic constituents that occur in the whole family are referred to as the amaryllidaceae alkaloids. the main aim of this study was the identification of alkaloid compounds from galanthus transcaucasicus fomin, a medicinal plant from amaryllidaceae. methods: planar and column chromatography techniques were us...
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