نتایج جستجو برای: acidic hexane
تعداد نتایج: 40901 فیلتر نتایج به سال:
the dried plant was extracted with dichloromethane and after defatting with hexane, transferred repeatedly on silica columns using dichloromethane-hexane and ethyl acetate-hexane as mobile phases. finally the fractions were purified by high performance liquid chromatography using a pack-sil column and hexane: ethyl acetate as mobile phase. the structures of the isolated compounds included: cycl...
in this study, both the presence and concentration of some unsaturated compounds in hexane extracts of different parts of anthemis talyschensis showing absorption at wavelength 280-450 nm were surveyed, with the view of possibly using extracts of this plant in new formulations of sunscreen creams. the hexane extracts of flower, leaf and stem of a. talyschensis , collected from northwest iran, w...
evaluation of solvent extraction efficiency –chemical analysis of the oil extracted from apple seeds
oils and fats are substances that are important nutritionally and have important role and impact on human health. energy consumption and preservation in respect of food industry and the increase in the world population and search for new sources of oils and fats to full fill the need of the society particulary the nutritional requirements have introduced this research topic. therefore aim of th...
Phytochemical screening and gas chromatography-mass spectrometry (GC-MS) methods were used to determine the phytochemical components of various extracts stems roots Catharanthus roseus. Preliminary n-hexane, chloroform, ethyl acetate methanol roseus carried out identify class compounds present in each extract. The results exhibited that steroids, terpenoids, flavonoids phenolic found every extr...
Background and purpose: Herbal drug derivatives have been commonly used in management and treatment and of some infections. This study aimed at evaluating the antibacterial effects of Chondrilla juncea L, Ajuga comata Stapf, Nepeta ucrainica L, and Delphinium speciosum M.B extracts. Materials and methods: Antibacterial activity of different extracts (n-hexane, dichloromethane, and methanol) o...
Background and aims: Exposure to the normal hexane can induce dysfunction of the nervous system and color vision impairment. Occupational risk assessment is established according to no observed adverse effect levels (NOAEL). Recently, because of the NOAEL’s limitations, the benchmark responses were applied for risk assessment. The study’s aim is an analysis of benchmark response in occupational...
Background: Polygonum bistorta has been used as a remedy for jaundice, smallpox, pimples, measles, cholera, diarrhoea, dysentery, expelling worms, insect stings and snakebites. In this study, the crude extract from P. bistorta and two fractions viz. hexane and chloroform obtained from the crude extract were studied for their median lethal dosages (LD50) in Swiss albino mice. Methods: Powdered ...
In this study efficacy of essential and fixed oil Laurus nobilis L., on controlling Aphis fabae Scopoli that grows Vicia faba L. (Fabaceae) has been studied by experiments set up in the laboratories Çukurova University Biology Plant Protection Departments 2016-2017. Fixed oils had previously found to be effective aphids according death rate Abbott test values, but they also phytotoxic effects p...
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