Dynamic Changes of Sugar Concentrations in Pulp of ‘Cara cara' Navel Orange(Citrus. sinensis L. Osbeck) after Application by Exogenous ABA and GA_3

The dynamic concentrations of glucose, fructose, sucrose and total sugar were determined through exogenous ABA and GA3 treatments during young period of fruit and before fruit coloring in pulp of ‘Cara cara’ navel orange. The results are as fol ows： 10 mg/L ABA increased glucose, fructose and total sugar concen-tration significantly or very significantly, ABA treatment of 50 mg/L increased sucrose concentration very significantly, but ABA treatment of 100 mg/L decreased glucose concentration very significantly. GA3 treatment of lower and middle concentrations（10, 50 and 250 mg/L） increased sucrose concentration very significantly, GA3 treatment of 10 mg/L had no remarkable effect on glucose and fructose concentration but in-creased total sugar concentration very significantly, GA3 treatment of 50, 250 and 500 mg/L decreased glucose, fructose and total sugar concentration very significant-ly. Therefore, ABA treatment of lower concentration could increase one or several kinds of sugar concentration, but GA3 treatment of higher concentration （250 and 500 mg/L） restrained sugar concentration in pulp of ‘Cara cara’ navel orange seri-ously.

乳酸菌发酵豆粕、菜籽粕和棉籽粕过程中总糖和还原糖含量变化的研究

利用DNS法对乳酸菌发酵豆粕、菜籽粕和棉籽粕的总糖和还原糖含量进行测定,研究了不同发酵时间这3种粕类饲料总糖和还原糖含量的变化,得出乳酸菌具有较强的-半乳糖苷酶活性,能够降解总糖使得还原糖含量增加,发酵72h时,总糖的含量分别下降了17.4%、33.26%和27.35%,而还原糖含量增加了6.47倍、10.15倍和1.73倍。

一种夏桑菊颗粒总糖的定量方法

目的:测定夏桑菊颗粒总糖的含量。方法:以D-无水葡萄糖为对照品,采用蒽酮-硫酸法。结果:测得市售夏桑菊颗粒的总糖含量为73.3 2%,SD=0.92%,RSD=1.26%(n=5)。结论:该方法操作简便,仪器要求简单,具有较高稳定性,测定结果重现性好,建立蒽酮-硫酸法作为夏桑菊颗粒总糖含量的质量控制方法具有可行性。

两种不同干燥方式对软枣猕猴桃成分的影响

软枣猕猴桃是东北地区重要的经济水果之一,有着丰富的营养价值,然而软枣猕猴桃有贮藏期限短的缺点,使得软枣猕猴桃的推广变得较为困难。为了提高其保存期限以及扩大产业发展潜力,对软枣猕猴桃鲜果进行干燥处理是一种较为常用的手段。本研究以市面上常见的几种软枣猕猴桃品种(KL、LC-2、LD-3、ZS)作为实验材料,采用两种干燥方式(烘干以及冷冻干燥)进行处理,通过对比干燥处理后的果干与软枣猕猴桃鲜果的维生素C含量,总糖含量,氨基酸含量,探究两种干燥方式对软枣猕猴桃主要营养成分的影响。