变性淀粉对河粉凝胶品质的影响研究

添加变性淀粉能改善河粉的凝胶特性.从9种变性淀粉中筛选出一种能使河粉的凝胶特性明显改善的变性淀粉,并通过正交试验得到其最佳作用条件为:保湿凝胶时间30 min,变性淀粉添加量2.0%,河粉水分55%.     

金华火腿皮制作皮冻的研究

金华火腿的火腿皮经石灰水浸泡、预煮、刮脂、切碎、复煮、打浆、熬胶和冷却等工序制作成火腿皮冻。     

抗应激功能食品研究概况

应激是机体受到外来刺激产生的非特异性反应，应激反应是当今社会普遍关注的问题。本文概述了应激的有关概念，对抗应激功能食品作了详尽介绍。     

米粉(米线)原料标准的研究

本文主要对米粉所用原料大米的糊化特性、品质特性进行了分析，并且对大米的可加工性与糊化数据、直链淀粉含量之间的相关性进行了分析。结果表明：当原料中直链淀粉含量高于27％，最低粘度600～800UV，最终粘度大于1300UV，回老值高于660UV时，加工出的米粉质量较好。大米中直链淀粉含量、最低粘度、最终粘度、回老值与可加工性呈极显著相关。     

全液态化生产红薯叶保健黄酒的研究

该法生产黄酒时,除用传统的糯米外,还添加了营养价值高的红薯叶为原料,用α-淀粉酶液化;黑曲霉、根霉培养液糖化。通过正交试验得出：糯米∶红薯叶为8∶2、根霉15%、黑曲霉5%、酵母接种0.2%,酒精发酵时,前期30℃通风培养,后期28℃静止培养,可有效地提高发酵速度;密闭状态下,高温、低温、间隔陈酿,可缩短陈酿时间。此黄酒具有保健作用。     

Interaction between rice bran albumin and epigallocatechin gallate and their physicochemical analysis

Epigallocatechin gallate (EGCG) is sensitive to heat thus its application in food industry is limited. In this work, rice bran albumin protein (RAP) was used as a carrier for EGCG. RAP-EGCG complexes (RAPE) were prepared with the binding number n of 0.0505:1 (EGCG: RAP, w/w) and binding constant K of (0.74?±?0.002)?×?10⁴ M^?1, which suggests that hydrogen bond/van der Waals forces played important roles in such binding. FTIR analysis demonstrated that EGCG could induce the secondary structure changes of RAP above the ratio of 1.92:1 (EGCG:RAP, w/w). Dynamic light scattering and scanning electron microscope results showed that EGCG could trigger RAP association. Furthermore, the EGCG stability in RAPE was significantly improved than that of free EGCG in 10–60 °C. The antioxidant ability of EGCG in RAPE was partially retained. These findings prove that RAP is a potential carrier for polyphenols and is beneficial for mechanism investigation between protein and polyphenols.     

化纤仿毛技术(上)

本文对化纤仿毛发展情况、仿毛用原料、织造及染整技术等作了较详细的论述。     

生物碘营养盐的研制

以海带为原料提取生物活性碘,进而与盐复配制得生物活性碘盐产品。对海带提取生物碘工艺条件进行了探索研究。考察了浸取时间,浸取温度,加水量对浸取率的影响,从而确定了理想工艺条件:浸取温度50℃,浸取时间9h,加水量20倍。实验制得生物碘营养盐产品,经检验含碘量为:29·2mg/kg,符合国家有关标准要求。     

Role of humic acid and ouinone model compounds in bromate reduction by zerovalent iron

Experiments were conducted to examine the role of humic acid and quinone model compounds in bromate reduction by Fe(0). The reactivity of Fe(0) toward bromate declined by a factor of 1.3-2.0 in the presence of humic acid. Evidence was obtained that the quick complexation of humic acid with iron species and its adsorption passivated the iron surface and decreased the rate of bromate reduction by Fe(0). On the other hand, in the long run, the reduced functional groups present in humic acid were observed to regenerate Fe(II) and reduce bromate abiotically. Compared with the case of humic acid only, the simultaneous presence of Fe(II) and humic acid significantly increased the bromate removal rate. Fe(III)/Fe(II) acted as a catalyst in the oxidation of humic acid by bromate. Anthraquinone-2,6-disulfonate (AQDS) and lawsone did not cause any significant effect on the bromate reduction rate by Fe(0). However, the redox reactivity of lawsone in the presence of Fe(III) was evident, while AQDS did not show any under the tested conditions. The difference was attributable to the presence/ absence of reducing functional groups in the model compounds. The electron spin resonance further demonstrated that the redox functional groups in humic acid are most likely quinone-phenol moieties. Although the bromate reduction rate by regenerated Fe(II) is a few times slower than that by Fe(0), the reactive Fe(II) can be, alternatively, reductively formed to maintain iron surface activation and bromate reduction to prolong the lifetime of the zerovalent iron.     

利用地层压力测试资料识别自由水面的方法

地层压力测试对了解地层特性具有重要意义,特别是在确定油水界面、划分压力系统和确定流体密度等方面尤为重要.由于获取地层压力资料和资料处理方法上的不确定性,解释分析测试压力资料时经常出现较大的误差.利用地层压力测试的RFT资料,基于水层压力测试数据,采用压力差异法对油藏压力测试数据进行折算处理,可以快速、准确地确定自由水面;同时,采用深度面分析法,利用油水压力数据之间的相互关系,通过数学计算和概率分析确定的自由水面精度也较高.实例应用表明,计算结果与实际结果符合程度较好,与常规方法相比精度较高,研究成果对油田开发具有一定的指导意义.