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排序方式: 共有123条查询结果,搜索用时 811 毫秒
121.
Caffeoylsophorose in a red vinegar produced through fermentation with purple sweetpotato 总被引:3,自引:0,他引:3
Terahara N Matsui T Fukui K Matsugano K Sugita K Matsumoto K 《Journal of agricultural and food chemistry》2003,51(9):2539-2543
Recently, a new red vinegar has been developed via fermentation with the storage root of purple-fleshed sweetpotato, Ipomoea batatas L. cv. Ayamurasaki. The red vinegar had a higher antioxidative activity than white or black vinegars. The red vinegar contained some new components possibly derived from the original purple sweetpotato. A major component was isolated using preparative HPLC, and the chemical structure was determined to be 6-O-(E)-caffeoyl-(2-O-beta-d-glucopyranosyl)-alpha-d-glucopyranose (caffeoylsophorose) by MS and NMR. Because the caffeoylsophorose showed a high antioxidative activity, it plays an important functional role in red vinegar as do anthocyanins and other components. Examination of the mechanism of formation is now in progress. 相似文献
122.
3维图像处理系统在稻米品质检测中的应用研究 总被引:12,自引:7,他引:12
侯彩云 Seiichi Oshit Yasuhisa Seo Yoshinori Kawagoe Toru Torii Kenichi Kudoh Toshiro Higuchi Gabsoo Do 《农业工程学报》2001,17(3):92-95
利用微切片3维图像处理系统对稻米的品质特性进行了探索性的研究。结果表明,借助于3维可视化技术,可以对稻谷的外观品质、营养品质及蒸煮品质等进行更为直观且客观的观察与测定。尤其是在营养成分分布密度的评价、心白米内部组织的分析、蒸煮过程中组织结构变化的观测等方面,取得了传统研究方法难以获得的结果。利用该系统对垩白度的定量化测定,为食品的定量形态学研究开辟了一条新的研究途径。 相似文献
123.
This study evaluated the potential of steam pre-treatment for making highly compressed phenol-formaldehyde (PF) resin-impregnated
wood at a low pressing pressure. Sawn veneers of Japanese cedar (Cryptomeria japonica) were first subjected to saturated steam at different steaming temperatures (140°-200°C), followed by impregnation with a
20% low molecular weight PF resin aqueous solution resulting in a weight gain of around 50%-55%. Four oven-dried treated veneers
were laminated and compressed up to a pressing pressure of 1 MPa at a pressing temperature of 150°C and pressing speed of
5 mm/min, and the pressure was held for 30 min. Steam treatment, causing partial hydrolysis of hemicellulose, accelerated
the compressibility of Japanese cedar in the PF resin-swollen condition. As a consequence, a discernible increment in density
was achieved at a pressing pressure of 1 MPa due to steam pretreatment between 140° and 200°C for 10 min. It was also found
that even a short steaming time such as 2 min at 160°C is sufficient for obtaining appreciable compression of PF resin-impregnated
wood. The density, Young’s modulus, and bending strength of steam-treated (200°C for 10 min) PF resin-impregnated wood composite
reached 1.09 g/cm3, 20 GPa, and 207MPa, respectively. In contrast, the values of untreated PF resin-impregnated wood composite were 0.87 g/cm3, 13 GPa, and 170MPa, respectively. 相似文献