Polymorphic calcium zincate has been successfully synthesized in alkaline solution at various concentrations as well as at different temperatures. SEM images indicated that the concentration of the alkaline solution a...Polymorphic calcium zincate has been successfully synthesized in alkaline solution at various concentrations as well as at different temperatures. SEM images indicated that the concentration of the alkaline solution affected significantly the morphology of the calcium zincate crystal. Calcium zincate crystalline changed from regular parallelogram to unregular small crashed grains at a higher alkali concentration. And hexagonal calcium zincate crystal was obtained at higher reaction temperature. The stoichiometric composition for calcium zincate was Ca(OH)2·2Zn(OH)2·(2n-2)H2O as analyzed by TG, where n decreased with the increase of the alkaline concentration. XRD analysis showed that the temperature affected differently the growth of each face of the crystal, which led to the hexagonal shape of calcium zincate crystal.展开更多
以野生火棘果为原料,采用酶法制备火棘果水溶性膳食纤维(SDF)。以单因素纤维素酶添加量、酶解时间和液料比为实验因素,以水溶性膳食纤维得率为响应值,采用三因素三水平的响应面分析法优化提取工艺条件。同时,利用气相色谱法研究了火棘...以野生火棘果为原料,采用酶法制备火棘果水溶性膳食纤维(SDF)。以单因素纤维素酶添加量、酶解时间和液料比为实验因素,以水溶性膳食纤维得率为响应值,采用三因素三水平的响应面分析法优化提取工艺条件。同时,利用气相色谱法研究了火棘果膳食纤维的单糖组成和物化性质。结果表明,酶法制备火棘果水溶性膳食纤维的最佳工艺条件为:酶添加量0.83%,酶解时间2 h,液料比23 m L/g,在此条件下火棘果SDF的得率预测值为5.97%,实际验证值为5.91%。火棘果膳食纤维的单糖成分主要为木糖、阿拉伯糖、鼠李糖、山梨糖,同时还含有少量的果糖和甘露糖,其中以木糖含量最高,达33.56%。物化性质实验表明,火棘果膳食纤维具有良好的持水性和持油性,同时对葡萄糖也具有较强的吸收能力。展开更多
文摘Polymorphic calcium zincate has been successfully synthesized in alkaline solution at various concentrations as well as at different temperatures. SEM images indicated that the concentration of the alkaline solution affected significantly the morphology of the calcium zincate crystal. Calcium zincate crystalline changed from regular parallelogram to unregular small crashed grains at a higher alkali concentration. And hexagonal calcium zincate crystal was obtained at higher reaction temperature. The stoichiometric composition for calcium zincate was Ca(OH)2·2Zn(OH)2·(2n-2)H2O as analyzed by TG, where n decreased with the increase of the alkaline concentration. XRD analysis showed that the temperature affected differently the growth of each face of the crystal, which led to the hexagonal shape of calcium zincate crystal.
文摘以野生火棘果为原料,采用酶法制备火棘果水溶性膳食纤维(SDF)。以单因素纤维素酶添加量、酶解时间和液料比为实验因素,以水溶性膳食纤维得率为响应值,采用三因素三水平的响应面分析法优化提取工艺条件。同时,利用气相色谱法研究了火棘果膳食纤维的单糖组成和物化性质。结果表明,酶法制备火棘果水溶性膳食纤维的最佳工艺条件为:酶添加量0.83%,酶解时间2 h,液料比23 m L/g,在此条件下火棘果SDF的得率预测值为5.97%,实际验证值为5.91%。火棘果膳食纤维的单糖成分主要为木糖、阿拉伯糖、鼠李糖、山梨糖,同时还含有少量的果糖和甘露糖,其中以木糖含量最高,达33.56%。物化性质实验表明,火棘果膳食纤维具有良好的持水性和持油性,同时对葡萄糖也具有较强的吸收能力。
