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Microwave-assisted extract process for flavonoids from ginger (FG) was studied. Influences of concentration of extracting agent, microwave power, material ratio and irradiation time on the extraction were investigated. From orthogonal experiments the optimum extracting parameters were determined as follows: microwave power, 640W, concentration of alcohol, 80%, the materials ratio, 1:30 (W: V) and...
The oil-tea cake as the byproduct of tea-oil from oil-tea seed is still not top-valued used. In order to improve the processing status of oil-tea cake from low-grade to high-grade, we used 300°C pyrolysis- GC/MS technology to analyze the top value-added biomedical and bioactive constituents of two extracts (benzene/ethanol and acetone) of oil-tea cake. Relative content of each component was determined...
With wood shatters as raw material and quartz sand as heat medium, the process of rapid pyrolysis of biology materials with a self-made rotating cone reactor was investigated. The optimal conditions by orthogonal test indicated the pyrolysis of biology materials was pyrolysis temperature at 550 ??, vacuum value at 0.08Mpa, rotate rate at 115r/min, diameter of materials at 30 mesh with the condition...
The branchlet and nutshell of Camelliaoleifera are produced in quantity while picking and processing the nut each year. However, the abundant branchlet and nutshell of C.oleifera are still underutilized and hence wasted to pollute environment. Therefore, GC/MS technology was used to analyze the top value-added components from the branchlet and nutshell of C.oleifera. After treated with freeze-drying,...
Abundant leaves and kernel hulls of Tea-oil tree (Camellia oleifera) are still underutilized and wastefully abandoned to pollute environment. In order to solve this problem and better utilize the leaves and kernel hulls of C. oleifera, we used GC/MS technology to analyze the top value-added bioactive constituents of their benzene/ethanol extractives. After treated with freeze-drying, the fresh leaves...
The production of noble Eucalyptus oil from Eucalyptus leaves brings a mass of extracting wastewater pollutive to water environment. In order to better utilize and recover the productive wastewater from the Eucalyptus oil, we used pyrolysis-GC/MS to analyze the possible top value-added components of benzene/ethanol extractives of leaves of two Eucalyptus cultivars, i.e. E.dunnii and E.grandis. Relative...
Crude extract, essential oil and oleoresin of fresh Zingeber Officinale Roscoe was studied for their antioxidant activity. Free radical scavenging activity was determined using DPPH free radical assay which based on the inhibition of the free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH). Concentrations 20-100% of these were prepared and their antioxidant activity was determined by spectrophotometer...
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