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Showing 1 to 20 of 100 for “"Ethyl acetate"”.
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Spontaneous Interfacial Cellular Convection Accompanying Mass Transfer: Ethylene-Glycol - Acetic Acid - Ethyl-Acetate
Made available in DSpace on 2014-12-05T17:15:38Z (GMT). No. of bitstreams: 1 6200660.pdf: 6343006 bytes, checksum: 805449c7a6b216fe5117f134437699a9 (MD5) Previous issue date: 1961
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Antithrombotic and anti-inflammatory activity of ethyl acetate extract of Protorhus longifolia stem bark
… and anti-inflammatory activity of the ethyl acetate extract of Protorhus longifolia stem bark. The in vitro antioxidant activity of the crude ethyl acetate was evaluated against DPPH, ABTS and nitric oxide radicals. Its reducing power and metal ion chelating potential were also …
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The effect of ultrasonic irradiation on the specific reaction rate constant in the acid hydrolysis of ethyl acetate
… rate of the hydrolysis of an aqueous solution of ethyl acetate in the presence of hydrochloric acid as the catalyst. The commercially obtained ultrasonic generator was limited to four frequencies - namely, 400, 700, 1000, and 1500 kilocycles. Two thousand volts plate voltage could be applied to …
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Anticancer activity of Lovage (Levisticum officinale Koch) extracts
… prostate epithelial cells). The n-hexane, ethyl acetate, methanol and methanol/water crude extracts of Lovage roots were prepared and tested for cytotoxicity using a resazurin metabolic indicator assay. The most cytotoxic extract was the hexane, followed by the ethyl acetate, while the …
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In vitro anti-platelet aggregation activity of the extracts of bulbine natalensis
… extracted sequentially using hexane, chloroform, ethyl acetate, methanol, and water. The chloroform extract had the highest yield of 0.20%. Phytochemical screening revealed the presence of anthraquinones, cardiac glycosides, saponins, tannins, flavonoids and alkaloids. The hexane extract revealed …
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Evaluation of anti-tuberculosis potentials of selected medicinal plants in Endau Rompin, Johor, Malaysia
… zone of inhibition (DIZ=18.67 ± 0.58 mm). Ethyl acetate extract of Musa gracilis and hexane extract of N. ampularia exhibited the lowest minimum inhibitory concentration (MIC=0.39 mg/mL). Hexane extract of N. ampularia showed the lowest minimum bactericidal concentration (MBC= 1.56 mg/mL). …
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The Fruit of Poncirius Trifoliata Promotes Mesenchymal Stem Cell Differentiation into Osteoblasts in Glucocorticoid-induced Osteoporosis Model
… function. The authors studied the effects of ethyl acetate extract of poncirus trifoliata on the activities of osteoblast and animal model. Effects of osteoblastic differentiation were measured by alkaline phosphatase (ALP) activity, osteopontin (OPN) protein expression and mineral nodule …
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Evaluation of six plant species used traditionally in the treatment and control of diabetes mellitus
… Langerhans insulin secretory activity. Hexane, ethyl acetate, acetone and methanol extracts were examined and screened for their phytochemical properties and activity in the selected assays Alpha amylase inhibitory assay Not all extracts of the plant species had α-amylase enzyme inhibitory …
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The Bioactivity and Natural Products of Scottish Seaweeds
… showed no detectable activity, while ethyl acetate extracts of Fucus serratus, Halidrys siliquosa, Osmundea pinnatifida and Polysiphonia fucoides showed activity against at least six of the seven strains. Extracts were screened for radical scavenging activity against ABTS, DPPH and …
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Coordination Cages for the Separation and Transportation of Molecular Cargo
… cages, reversible transport between water and ethyl acetate is demonstrated. Sequential phase transfer can also be achieved such that, from a mixture of cubic (+16) and tetrahedral (+8) cages, the cubic cage transfers from water to ethyl acetate before the tetrahedral cage. This process is …
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Design of a small-scale continuous linear motion pharmaceutical filtration module
… (API) from a mixture of API molecules, ethyl acetate, and possible contaminants. This unit is important in the development of a small-scale continuous pharmaceutical manufacturing process by Novartis, which would lower costs and increase product flexibility and production. A compliant …
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Insecticidal Natural Products From Sri Lankan Plants
… have been identified from the petroleum ether-ethyl acetate extract of the stem bark of <i>Pleurstylia opposita</i>. They are homologues of known macrocyclic sesquiterpene alkaloids which contains a 6,6 ring system based on the ß-dihydroagarofuran core. The extra methylene has been shown by NMR …
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Phytochemical analysis and selected biological activity of Phyllanthus parvulus Sond. var garipensis
… linked glycoside was isolated from the ethyl acetate fraction. The hexane, chloroform, ethyl acetate, methanol, ethanol and water extract were tested for antibacterial and antioxidant activities. All the plant extracts showed activity with chloroform extract exhibiting high activity …
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The effect of die geometry on extruded paste flow for continuous production of pharmaceutical tablets
… active pharmaceutical ingredient (API) and ethyl acetate requires a device to form and compress the tablets. The flow of the wet extrusion is driven by the pressure head generated by the torque of the screws; the minimum pressure head is dictated by the head loss across the exit die. Since …
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Characterisation and Screening of secondary metabolites from Commiphora viminea (Burtt Davy, Burseraceae) Engl. for antifungal properties against Candida auris
… of varying polarity (water, acetone, and ethyl acetate), supported by LC–MS analysis for metabolite identification. The aim was to provide scientific validation for the traditional use of this species and its suitability for natural product research. Qualitative phytochemical screening …
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The Isolation of Natural Products From Plant Extracts
Bioassay-guided fractionation of the ethyl acetate extract of Virola sp. (Myristicaceae) using the Sc7 yeast strain resulted in the isolation of the weakly cytotoxic biochanin A (an isoflavone compound). The bioassay of three mutant yeast strains (1138, 1104, and 1353) directed the isolation of …
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Growth hormones and their relationship to seed dormancy in Quercus
… No transfer of activity from one pH-dependent ethyl acetate-soluble fraction to another occurred. A slight increase in GA-like activity occurred between 5 'and 7-1/2 weeks of stratification. Red oak seeds stratified for 18 weeks contained significantly more GA-like activity than those receiving …
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Phytochemical and biological investigation of Lathyrus linofilius as a possible treatment in diabesity
… were isolated for the first time from the ethyl acetate extract of thetubers; these were betulinic acid, lupeol, stigmasterol and β-sitosterol. The isolatedcompounds are known for their beneficial effects on hyperglycaemia and obesity tosome extent. Betulinic acid was the major component in …
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Two New Resorcinarenes: A Pyridine & Acetic Acid Ligand for Metal Coordination and a Deep-Cavity Nitroquinoxaline Resorcinarene
… To synthesize this compound, tetra(bromomethyl)cavitand was reacted with N-(2-pyridylmethyl)-N-ethylacetate amine to give ethyl acetate pyridine resorcinarene. Hydrolysis of the ester gave acetic acid pyridine resorcinarene (APRes) in good yield. Complexes with Cu2+, Co2+, and Zn2+ are …
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