نتایج جستجو برای: the samples were analysed using gas chromatography
تعداد نتایج: 16674039 فیلتر نتایج به سال:
Objective(s): The purpose of this study was to evaluate variations in yields, volatile composition and biological activities of essential oils (EOs) obtained from the aerial parts of Zhumeria majdae collected from five localities of the south of Iran. Materials and Methods: The EOs were analyzed using gas chromatography and gas chromatography-mass spectrometry techniques. The antioxidant activi...
چکیده در این پژوهش، رابطه بین سبک های مقابله ای با جرأت ورزی و پرخاشگری در دانشجویان دانشگاه بین المللی امام خمینی (ره) بررسی شد. نمونه مورد بررسی، شامل 200 نفر (121 زن و 79 مرد) از دانشجویان دانشگاه مورد نظر در دو جنس است که از طریق روش نمونه گیری خوشه ای تصادفی، انتخاب و به پرسشنامه های الگوهای پاسخ دهی بین فردی تونند و پرسشنامه سبک های مقابله ای اندلر و پارکر پاسخ دادند. همچنین از روش های ...
the aim of conducting this study was to investigate the foreign language learning needs of undergraduate economics students and business management students in faculties of social sciences of alzahra and azad naragh university. in the study, which was designed on the basis of a qualitative-quantitative basis using interviews and questionnaires, 146 female undergraduate business management as we...
background: urinary organic acids are water-soluble intermediates and end products of the metabolism of amino acids, carbohydrates, lipids, and a number of other metabolic processes. in the hereditary diseases known as organic acidurias, an enzyme or co-factor defect in a metabolic pathway leads to the accumulation and increased excretion of one or more of these acidic metabolites. gas chromato...
background: many members of the genus satureja l. (lamiaceae) have interesting pharmacological and biological properties. objective: in this research, major essential oil (eo) compositions, rosmarinic acid (ra) content, and antioxidant and antibacterial properties of the leaf extracts of nine satureja species (s. bachtiarica, s. mutica, s. sahandica, s. macrantha, s. atropatana, s. edmondi, s. ...
Calystegines were isolated from the root cultures of Physalis divaricata, P. pubescens, P. philadelphia,and P. philadelphia (solanaceae). Calystegines of P. divaricata were identified as calystegine A3, A5, B1 and B2, with concentrations of 6.99, 4.41, 8.52, and 14.7 ?g/g in fresh mass, respectively. Root cultures of P.pubescens contain calystegine A3, B1 and B2, P. philadelphia only contains ...
learning a second or foreign language requires the manipulation of four main skills, namely, listening, reading, speaking, and writing which lead to effective communication. it is obvious that vocabulary is an indispensible part of any communication, so without a vocabulary, no meaningful communication can take place and meaningful communication relies heavily on vocabulary. one fundamental fac...
with the increasing population and the need for more food, as well as with the development of science and technology, human approach to unnatural and often chemical inputs to increase agricultural production has been a great expansion and problems such as increased cancers, chronic diseases has created environmental pollution. implementation of organic organic is a solution to these problems . ...
BACKGROUND The study of propolis odorants by gas chromatography-olfactometry-mass spectrometry has rarely been put into practice until now. This study aimed to investigate the common odorants of 23 samples of Chinese propolis and analyse the relationship between the principal components and the regions where the samples had been obtained. RESULTS By using dynamic headspace sampling, gas chrom...
BACKGROUND The microbiological diagnosis of infectious diarrhoea may take several days using conventional techniques. In order to determine whether flatus can be used to make a rapid diagnosis, the volatile organic compounds associated with diarrhoea were analysed. METHODS Stool samples were collected from 35 patients with infectious diarrhoea and from six healthy controls. Gaseous compounds ...
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