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  • 1
    Electronic Resource
    Electronic Resource
    Effect of Gamma-irradiation on Color, Pungency, and Volatiles of Korean Red Pepper Powder (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 69 (2004), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : Effect of gamma-irradiation on color, pungency, and volatiles of Korean red pepper powder (Capsicum annuum L.) was investigated. Red pepper powder, vacuum-packaged in a polyethylene/polypropylene bag, was gamma-irradiated up to 7 kGy. An irradiation dose of 7 kGy reduced the population of mesophilic bacteria and fungi effectively without affecting major quality factors. Pungency of irradiated red pepper powder was not changed based on the amount of capsanoids by high-performance liquid chromatography (HPLC) and the Scoville sensory score. The red color of irradiated pepper powder was not significantly different from that of the control, judged from the capsanthin content by HPLC and color assessment using spectrophotpmetric (American Spice Trade Assn. units) and colorimetric measurements (Hunter a values). Further, the sensory evaluation showed no significant difference in pungent odor and off-odor between nonirradiated control and irradiated red pepper powder. However, when headspace volatiles of gamma-irradiated red pepper powder were evaluated by gas chromatography/ mass spectrometry with solid-phase microextraction and electronic nose with metal oxide sensors, the profiles of odor were classified into irradiated dose levels of 0, 3, 5, and 7 kGy by principal component analysis and multivariate analysis of variance. Such a difference of odor might result from the disappearance of some volatiles, such as hexanoic acid and tetramethyl-pyrazine, and the appearance of 1,3-di-tert-butylbenzene during irradiation. Moreover, it appears that the irradiation of packaging material induced a formation of 1,3-di-tertbutylbenzene, which migrated into the red pepper powder.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2004.tb09904.x
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  • 2
    Electronic Resource
    Electronic Resource
    Physicochemical and Volatile Characterization of Structured Lipids from Olive Oil Produced in a Stirred-tank Batch Reactor (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 69 (2004), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : Structured lipid (SL) from conjugated linoleic acid (CLA) with olive oil was produced, and the physicochemical and volatile characterizations were investigated. In SL-olive oil, 21.8 mol% of CLA isomers were incorporated, and the removal of tocopherols (63% loss from original olive oil) and chlorophylls (50% loss) was observed. The distinct exothermal peaks observed became broader, and the position of the peak shifted to a lower temperature in SL-olive oil compared with normal olive oil. Reverse-phase (ODS column) high-performance liquid chromatography with an evaporative light-scattering detection separated the newly synthesized SL-triacylglycerols (TAGs), in which the incorporation of CLA into olive oil increased the content of TAGs with partition number 〈48 from 9% (in olive oil) to 78% (SL-olive oil). Total amount of volatile compounds in SL-olive oil was smaller than those in olive oil, indicating removal of flavor compounds from olive oil occurred during the processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2004.tb15508.x
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  • 3
    Electronic Resource
    Electronic Resource
    Can bone turnover markers correlate bone mass at the hip and spine according to menopausal period? (2000)
    Springer
    Archives of gynecology and obstetrics 264 (2000), S. 119-123 
    Details
    ISSN: 1432-0711
    Keywords: Keywords Bone turnover marker ; Osteoporosis ; Menopause ; Bone mineral density
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Changes in bone turnover with years since menopause (YSM) are responsible for bone loss and play a major role in osteoporosis. Although single measurements of the bone turnover marker appear unlikely to be clinically useful in predicting bone mineral density, the usefulness of these measurements in relation to the YSM has not been well established. The establishment of this relationship was the aim of this study. To address this issue, we have measured a battery of sensitive and specific markers of bone turnover in 272 women postmenopausal from –5 to 15 a, and the data was correlated with bone mineral density (BMD) at different skeletal sites measured utilizing dual-energy X-ray absorptiometry (DXA). Bone formation was assessed by serum osteocalcin (OC), and bone resorption by Pyr and D-pyr. The three markers and BMD were compared between the groups (YSM). Among the three markers, only Pyr exhibited a significant difference between pre and postmenopausal groups. In the aspect of correlation between bone turnover marker and BMD according to the groups (YSM), we found negative strong correlations between the BMD of lumbar spine (L2–4) vs. Pyr (P=0.01, r=–0.75) in the premenopausal group (–5∼0 YSM), and we found negative correlation between the BMD of L2–4 vs. osteocalcin (P=0.05, r=–0.2 and P=0.01, r=–0.44) in the postmenopause groups (0∼5 and 5∼10 YSM). We concluded that Pyr in women –5∼0 YSM and osteocalcin in women 0∼10 YSM displayed negative correlation with BMD of L2–4.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004040000093
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  • 4
    Electronic Resource
    Electronic Resource
    Catalytic utilization of carbon dioxide to polymer blends via cyclic carbonate (1998)
    Springer
    Reaction kinetics and catalysis letters 65 (1998), S. 219-226 
    Details
    ISSN: 1588-2837
    Keywords: Carbon dioxide ; catalytic utilization ; cyclic carbonate ; polymer blends
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In the present study, the synthesis of bis(cyclic carbonate) from carbon dioxide and bisphenol A (or bisphenol S)-diglycidyl ether was investigated using quaternary ammonium salts as catalyst. Among the salts tested, the one having a larger alkyl group and more nucleophilic counter anion exhibited a better catalytic activity. Poly(hydroxyurethane)s were prepared by the polyaddition reaction of bis(cyclic carbonate) and diamine. The poly(hydroxyurethane) has shown higher thermal stability than conventional polyurethane, and is expected as novel reactive polyurethane. The miscibility of blends containing poly(hydroxyurethena) and poly(styrene-co-acrylonitrile)(SAN) has been also studied by the optical clarity method and DSC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02475256
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    Paper (German National Licenses)
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