Department of Chemical Engineering, Jadavpur University, Kolkata 700032, India.
Department of Chemical Engineering, Jadavpur University, Kolkata 700032, India.
Int J Biol Macromol. 2018 May;111:967-975. doi: 10.1016/j.ijbiomac.2017.12.146. Epub 2018 Jan 12.
The oil extracted from Crotalaria juncea (Sunn-hemp) contains 70% of gum. Several methods of degumming are attempted in order to maximize the yield of gum. During appropriate water induced degumming, about 95-98% of phosphatides are separated. The maximum oil yield for two types of degummimg processes are 0.59% and 0.69% corresponding to hot water and pure O-phosphoric acid (19.88 N) treatment respectively. The % oil yield obtained for TOP degumming is about 0.78%. Physico-chemical characteristics of the isolated gum such as moisture, ash, protein, fat and aqueous solubility along with FTIR and TGA analysis are studied in order to evaluate the effect of extraction process. The behaviour of gum on the molecular scale is evaluated through alcohol treatment. Chromatographic analysis determines the monosaccharide content of the gum with glucose: xylose: arabinose::54: 34:1. Rheological characterization shows that the juncea gum solutions are shear rate dependent and the behaviour is shear-thinning (or pseudoplastic). Results show that the temperature dependent viscosity decreases with increasing shear rate.
从猪屎豆（田菁）中提取的油含有 70%的胶。为了最大限度地提高胶的产量，尝试了几种脱胶方法。在适当的水诱导脱胶过程中，大约 95-98%的磷脂被分离。两种脱胶工艺的最大出油率分别为 0.59%和 0.69%，分别对应于热水和纯 O-磷酸（19.88 N）处理。TOP 脱胶的出油率约为 0.78%。为了评估提取过程的影响，研究了分离胶的物理化学特性，如水分、灰分、蛋白质、脂肪和水溶性，以及傅里叶变换红外光谱（FTIR）和热重分析（TGA）。通过醇处理评估胶在分子尺度上的行为。色谱分析确定了胶的单糖含量，葡萄糖：木糖：阿拉伯糖=54:34:1。流变特性表明，猪屎豆胶溶液的剪切速率依赖性为剪切稀化（或假塑性）。结果表明，随剪切速率的增加，温度依赖性粘度降低。
