نتایج جستجو برای: برگ بو laurus nobilis l
تعداد نتایج: 633186 فیلتر نتایج به سال:
A fourth production region for the globally important Antarctic bottom water has been attributed to dense shelf water formation in the Cape Darnley Polynya, adjoining Prydz Bay in East Antarctica. Here we show new observations from CTD-instrumented elephant seals in 2011-2013 that provide the first complete assessment of dense shelf water formation in Prydz Bay. After a complex evolution involv...
Embolism repair and ionic effects on xylem hydraulic conductance have been documented in different tree species. However, the diurnal and seasonal patterns of both phenomena and their actual role in plants' responses to drought-induced xylem cavitation have not been thoroughly investigated. This study provides experimental evidence of the ability of three Mediterranean species to maintain hydra...
به منظور مطالعه نقش آللوپاتیک غلظت های مختلف صفر، 100، 200، 300 و 400 قسمت در میلیون اسانس گیاه دارویی برگ بو بر جوانه زنی و استقرار اولیه علف های هرز گاو پنبه و پیچک صحرایی آزمایشی در سال 1392 در دانشگاه آزاد اسلامی واحد تبریز اجرا شد. بر اساس یافته ها، میزان جوانه زنی بذر در تیمار آب مقطر 73.3 درصد و در میانگین تیمارهای برخوردار از اسانس 64.7 درصد بودند. کمترین طول بوته در تیمار 400 قسمت...
Antimicrobial and antiquorum sensing (AQS) activities of fourteen ethanolic extracts of different parts of eight plants were screened against four Gram-positive, five Gram-negative bacteria and four fungi. Depending on the plant part extract used and the test microorganism, variable activities were recorded at 3 mg per disc. Among the Grampositive bacteria tested, for example, activities of Lau...
In this project, total phenolic and flavonoid contents of the aqueous extract of Laurus nobilis L. leaves were evaluated by colorimetric methods. These natural products which are found in plants extracts, can be considered as reducing and stabilizing agents in the synthesis of metal nanoparticles. Regarding to high amounts of these compounds in the extract, silver nanoparticles were synthesized...
در این پژوهش ابتدا عصاره متانولی برگ گیاه برگ بو استخراج و ترکیبات شیمیایی آن شناسایی گردید. سپس میزان کل ترکیبات فنولی و فعالیت دام‌اندازی رادیکال‌های آزاد عصاره استخراج شده در غلظت های مختلف (200، 400، 800 و 1600 ppm) بررسی گردید. در مرحله بعد غلظت‌های عصاره ذکرشده به روغن کانولا تصفیه شده فاقد آنتی‌اکسیدان افزوده شد و پایداری اکسایشی روغن در دمای 60 درجه سانتی‌گراد به مدت هفت روز از طریق ان...
A microwave-assisted hydrodistillation protocol was modified to extract essential oils from leaves of Salvia triloba L. and Laurus nobilis L. The essential oils of these plants are generally obtained by hydrodistillation or steam distillation. The volatile compounds obtained by microwave-assisted hydrodistillation and hydrodistillation methods were analyzed by GC and GC/MS. Both distillation me...
Stem photosynthesis has been suggested to play relevant roles cope with different biotic and abiotic stress factors, including drought. In the present study, we performed measurements of stem hydraulic conductance non-structural carbohydrate content in evergreen Laurus nobilis L. deciduous Populusalba L., subjected inhibition successive exposure a drought-recovery cycle order check if may be in...
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