Germination improves the functional properties of soybean and enhances soymilk quality

The effects of soybean variety and germination time on structural changes, antinutritional factor content, antioxidant activity of germinated soybean, and on the functional properties of soymilk were comprehensively investigated. The results showed that the antioxidant activity increased with increasing germination time. The content of antinutritional factors decreased with increasing germination time. Soybean varieties with the lowest tannin and trypsin inhibitor content were DN690 and HJ1. Lipoxygenase activity and phytic acid content showed no significant differences among soybean varieties. The content of α-helices and β-turns in soybean protein decreased with increasing germination time, while the content of β-sheets was increased. Soybean protein was progressively broken down into smaller molecular peptides during the germination process. The digestion and content of soluble protein in soymilk increased with germination. In summary, we show that germination is an effective, cheap, and green method that improves the functional properties of soybean and soymilk.     

Adaptive Synchronization of Time Delay Chaotic Systems with Uncertain and Unknown Parameters via Aperiodically Intermittent Control

International Journal of Control, Automation and Systems - Time delay and uncertainty are the two common phenomena in nonlinear systems, which seriously influence the control and synchronization of...     

Purification and characterization of a novel bacteriocin CAMT2 produced by Bacillus amyloliquefaciens isolated from marine fish Epinephelus areolatus

A novel bacteriocin named CAMT2 was produced by strain ZJHD3-06 which was isolated from the marine fish Epinephelus areolatus and identified as Bacillus amyloliquefaciens, Bacteriocin CAMT2 inhibits important food spoilage and food-borne pathogens such as Listeria monocytogenes, Staphylococcus aureus, Escherichia coli and Vibrio parahaemolyticus. Bacteriocin CAMT2 was purified by ammonium sulfate precipitation, gel filtration chromatography on Sephadex G-50 and reversed phase chromatography on a C₁₈ column. The molecular mass of the purified bacteriocin CAMT2 was about 20.0 kDa and N-terminal sequencing of the peptides revealed low similarity with existing antimicrobial peptides, as determined by an LC–MS/MS system. Bacteriocin CAMT2 was resistant for up to 100 °C and pH ranging 2–10, but lost its activity when treated with protease K. The bacteriocin also showed significant antimicrobial activity against L. monocytogenes in a meat model system. These obtained results suggest that bacteriocin CAMT2 has potential for use as a food biopreservative.     

Preparation and characterization of carboxymethyl starch under ultrasound‐microwave synergistic interaction

Using native cassava starch as raw materials, carboxymethyl starch (CMS) was prepared by ethanol solvent method under the ultrasound‐microwave synergistic interaction. And the structure of CMS was characterized employing Fourier transform infrared (FTIR) spectrometer, scanning electron microscopy (SEM), X‐ray diffraction (XRD) and thermogravimetric analyzer. Typically, the optimal synthesis conditions for the preparation process confirmed by orthogonal experiment L₁₈ (6¹ × 3⁶) were shown as follows: the ultrasonic treatment temperature was fixed to 35°C and two steps alkalization was employed; the ultrasonic time was 40 min before alkalizing and the ultrasonic power was 220 W; the amount of sodium hydroxide was 8.8 g, the microwave alkalization time was 2 min; the amount of monochloroacetic acid was 11.34 g; the amount of 95% (v/v) ethanol was 70 mL; the microwave etherification time was 3 min. The degree of substitution of prepared CMS was 1.089 ± 0.041, which was increased 30.4% compared with the prepared sample without ultrasound‐microwave synergistic treatment. FTIR results showed that the strong ? COO? characteristic absorption peaks of the stretching vibration were observed at 1613 and 1421 cm^?1, which proved that the carboxymethylation of cassava starch was occurred. SEM results suggested that there were many cracks and dents on CMS granules; and, XRD results indicated that the carboxymethylation of starch occurred both in amorphous region and crystalline region, the noticeable damage of crystalline region by carboxymethylation was observed. Thermogravimetric analysis (TG) and derivative TG showed that thermal stability of CMS changed better compared with native starch. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40906.     

地方高校海洋科学特色专业建设与探索

地方高校海洋科学特色专业应以海洋区域经济发展为背景,明确海洋科学专业建设目标,围绕专业特色进行课程体系、实践教学体系和课程教学的改革与探索。在特色专业建设的过程中需要着重解决好专业课程设置与培养规格的关系、教学与科研结合、教材建设和教学方式等方面的问题。     

培养应用型油气储运人才的信息化教学探索

结合北部湾地区对油气储运人才的需求,以培养服务地方的应用型油气储运人才为目标,对培养油气储运人才的基础化学教学过程进行了改革。通过将信息化教法和信息化学法引入课堂教学,不仅可以更加高效的对知识体系进行优化整合,而且教学过程更加生动有趣,有利于提高学生自主学习的积极性,提高教学效率。本文以原电池知识的信息化教学为例,探索研究了信息化教法和信息化学法在培养应用型油气储运人才中的应用,将对其他专业应用型人才的培养也具有指导意义。     

光伏产业产品销售量预判方法研究与仿真

研究光伏产业销售量的预判问题,提高判断结果的准确性。光伏产业与传统产业不同,在销售过程中存在较大特殊性,市场需求和供给在时间上存在较大跨度,市场上的需求和供给也极为不同步,造成销售量、生产量之间存在较大的时域冲突。传统的销售量预判模型多是基于销售量和生产量这两个单项指标完成估计的,两者的冲突会导致数学模型发生逆向偏差,造成判断准确性不高。为此提出了一种基于冲突融合集重心评价的光伏产业产品销售量估计方法。通过确定建立冲突融合规则和单项指标的比重冲突融合区间,计算指标控制函数的权值重心,运用冲突融合计算理论求出判断意见,最小化单项之间的冲突。实验结果表明,该算法能够提高光伏产业销售量判断结果的准确性,取得良好效果。     

LDO-75催化剂的工业应用

考察了LDO-75催化剂在中国石油广西石化公司3.5 Mt/a重油催化裂化装置上的工业应用。结果表明,LDO-75催化剂具有良好的重油转化能力和抗重金属污染能力。装置运行后,产品中干气质量分数为2.86%,液化气质量分数为17.34%,汽油质量分数为34.40%,柴油质量分数为28.66%,转化率为64.47%,总液收率可达80.40%。     

交联酯化作用对木薯淀粉表面活性的影响

以木薯淀粉（NS）为原料,环氧氯丙烷为交联剂,辛烯基琥珀酸酐为酯化剂,利用湿法工艺合成了交联淀粉（CS）、辛烯基琥珀酸淀粉酯（OSAS）及交联辛烯基琥珀酸淀粉酯（COSAS）,并用实验方法测定了NS、CS、OSAS和COSAS的基本表面活性：对钙离子的容忍度,临界溶解温度（Krafft点）,起泡性和泡沫稳定性,对植物油脂和矿物油的乳化活性。结果表明：这4种淀粉对钙离子容忍度次序为：N4种淀粉㈣点均在70℃左右：4种淀粉起泡性及泡沫稳定性顺序为：OSAS〉COSAS〉NS〉CS：4种淀粉乳化性能大小顺序为oSAS〉COSAS〉CS〉NS。