نتایج جستجو برای: gc and gc ms
تعداد نتایج: 16844927 فیلتر نتایج به سال:
background & aim: peppermint (mentha piperita l.) oil is one of the most popular and widely used as an essential oil. the aim of this study was to identify of the chemical components of peppermint cultivated in isfahan climatic conditions. experimental: the aerial parts of the plants were collected from a filed in meymeh, isfahan province in 2012. the essential oil was extracted by a cleven...
background & aim: echinophora cinerea is a plant of the apiaceae family, which reaches to a height of 30 to 100 cm. the essential oil of echinophora cinerea contains alkaloids and flavonoids etc. phenolic composition is one of the best sources of natural antioxidants. the goal of this study is to examine the antibacterial and antioxidant activities of the essential oil of e. cinerea. experi...
هدف از این پژوهش شناسایی باکتری های تجزیه کننده آلاینده های نفتی برای زیست پالایی پساب های آلوده به نفت است. تحقیق حاضر با هدف جداسازی و شناسایی باسیل های تجزیه کننده نفت خام انجام شد. به منظور بالا بردن احتمال جداسازی باسیلوس ها از نمونه های برداشت شده بر روی محیط کشت اختصاصی (msm) کشت داده شد و به آن 1% نفت خام به عنوان تنها منبع کربن اضافه گردید. با کشت باکتری ها روی محیط بلاد آگار باکتری ه...
The applicability of GC, GC/MS and liquid chromatography with tandem mass spectrometry (LC/MS/MS) to screening for 140 pesticides in agricultural products was examined. Validation of multi-residue screening methods for the determination of 88 pesticides in 12 crops (asparagus, cauliflower, burdock, carrot, broccoli, spinach, matsutake mushroom, orange, soybean, sesame, millet and tea) was done ...
the essential oil of stachys lavandulifolia vahl (lamiaceae) was isolated by hydrodistillation of the aerial parts of the plant, with a yield of 0.25%. the chemical composition of volatile oil was analyzed by capillary gc and gc/ ms. the main components were germacrene-d (13.2%), ?-phellandrene (12.7%), ?-pinene (10.2%), myrcene (9.4%), ?-pinene (8.4%) and z-?-ocimene (5.8%).
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