• Title/Summary/Keyword: aldehydes

Search Result 774, Processing Time 0.031 seconds

Yield Comparisons of Different Methods of Waxy Fraction Extraction from Grain Sorghum

  • Weller, Curtis L.;Hwang, Keum-Taek;Schmidt, Bradley J.
    • Food Science and Biotechnology
    • /
    • v.15 no.5
    • /
    • pp.786-791
    • /
    • 2006

  • Three solvent extraction techniques were used to recover waxy tractions from grain sorghum kernels. Yield and chemical composition of the waxy tractions obtained by reflux, bench scale (recirculated solvent), and countercurrent extraction methods were compared. Waxy traction yield from countercurrent extraction (0.200%) was significantly greater (p<0.05) than the yields of wax from both reflux (0.184%) and bench-scale (0.179%) methods. The waxy traction extracted using the bench-scale method showed the greatest relative amount of long-chained (primarily C:28 and C:30) alcohols while the countercurrent-extracted wax showed the greatest relative amount of long-chained fatty acids and fatty aldehydes. Countercurrent extraction removed a higher additive percentage of fatty aldehydes, acids, and alcohols than reflux or bench-scale extraction method.

  • PDF KSCI

Adsorption Properties of Demineralized Activated Carbon (세정 활성탄의 흡착특성)

  • 김정열;신창호;서문원;김영호;이근희;지상운
    • Journal of the Korean Society of Tobacco Science
    • /
    • v.18 no.1
    • /
    • pp.85-91
    • /
    • 1996

  • Commercially available activated carbon was treated with 0.2N NaOH/0.1N HCl to decrease the ash contents and to analyze the effect of demineralization. We have studied their properties and adsorptivity to solvents such as benzene, acetone, toluene and carbon tetrachloride, ammonia and also aldehydes of cigarette smoke. By demineralization with NaOH/HCl, surface area and pore volume were increased up to 10 - 20% according to developement of micro-pore and pH of activated carbon was also changed from 10.2 to 6.3. Surface acidity of the activated carbon treated with chemicals increased slightly. The chemical treatment led to small increase in adsorptioil properties of solvents, ammonia and aldehydes of cigarette smoke, but content of chlorine and sulfur in activated carbon were reduced. As the results of smoking test, charcoal taste caused by the activated carbon was reduced significantly by the treatment with NaOH/HCl.

  • PDF