四种植物天然抗氧化剂活性初探

本文研究了荔枝草、降香、紫草和甘西鼠尾四种植物的抗氧化活性，发现这四种植物的粗粉及乙酸乙醋提取物均有显著的抗氧化活性，与BHA及VE也有一定的协同作用，对加入Fe^3 的猪油，这四种植物的乙酸乙酯提取物仍表现出明显的抗氧化活性。     

抗氧化剂抗氧化方法研究进展

综述了目前常用的抗氧化活性筛选方法，以其为更好地评价样品的抗氧化活性提供依据。     

天然酚类抗氧化剂（2）

简述了天然酚抗氧化剂对食品中植物油的自动氧化与抗氧化剂的反应机理，着重介绍了生育酚、黄酮类、酚酸等类化合物存在于自然界中的化学组成，抗氧化活性及个别提取方法。同时还分述了大豆、花生等十多种植物、植物流出物１植物薰剂与真菌中所含天然酚抗氧化剂的成分及其抗氧化活性。     

天然酚类抗氧化剂（1）

简述了天然抗氧化剂对食品中植物油脂的自动氧化的反应机理，着重介绍了生育酚、黄酮类、酚酸等类化合物存在于自然界中的化学组成，抗氧化活性及个别提取方法。同时还分述了大豆、花生等十多种植物、植物流出物、植物薰剂与真菌中所含天然酚抗氧化剂的成分及其抗氧化活性。     

天然酚类抗氧化剂（2）

简述了天然酚抗氧化剂对食品中植物油脂的自动氧化与抗氧化剂的反应机理，着重介绍了生育酚、黄酮类、酚酸等类化合物存在于自然界中的化学组成，抗氧化活性及个别提取方法。同时还分述了大豆、花生等十多种植物、植物流出物、植物薰剂与真菌中所含天然酚抗氧化剂的成分及其抗氧化活性。     

从天然植物中开发抗氧化剂研究进展

综述了天然植物中起抗氧化作用的活性成分及其抗氧化和清除自由基的作用机理及国内外天然植物开发天然抗氧化剂的一些研究现状和新进展，并提出了一些展望。     

两种植物原料中提取的天然抗氧化剂探讨

从茶叶中提取的天然抗氧化剂-茶多酚的抗氧化效果良好，生产工艺合理，产品品质好，可作动、植物油脂和其他食品的抗氧化剂；从油料加工副产品-花生壳中提取的天然黄酮类抗氧化剂，其抗氧化活性相当于BHA，高于α-生育酚，并且有良好的热稳定性。     

抗氧化剂抗氧化方法研究进展

综述了目前常用的抗氧化活性筛选方法,以其为更好地评价样品的抗氧化活性提供依据。     

56种植物原料抗氧化性能研究

采用Rancimat法,对所选56种天然植物原料进行抗氧化活性研究,结果表明,诃子、补骨脂、厚朴、生姜、地榆、何首乌、白屈菜、丁香、香薷、肉豆蔻、牛蒡、草果、山楂、芡实等14种原料具有强抗氧化活性。     

天然抗氧化植物化学物的研究进展

近年来大量研究发现,许多水果、蔬菜和中草药中富含具有抗氧化能力的植物化学物,它们能够保护机体,抵抗各种各样的疾病。因此,含有这些植物化学物的食品引起了消费者的关注,同时也成为科研工作者研究开发的热点。阐述近年来国内外对抗氧化植物化学物方面的一些研究进展,包括植物化学物抗氧化活性的评估、植物化学物的提取和分离。     

Determination of sugars in tropical root crops using 13C N.m.r. spectroscopy: Comparison with the h.p.l.c. method

The ¹³C nuclear magnetic resonance (n.m.r.) spectrum of sugars normally present in foods, viz. glucose, fructose, sucrose, maltose and raffinose contains resonances that are diagnostic of each sugar. The quantity of each sugar is determined by measurement of the ratios of the peak heights of the sugar resonances compared with peak height of an internal standard, present at constant concentration in all solutions. A linear calibration relationship between the peak height ratio and concentration is established for single resonances of glucose and fructose and for two resonances of each of sucrose, maltose and raffinose. Samples of sweet potato and taro flour dried at 40°C, were blended with 80% ethanol, the sugars were extracted and analysed by ¹³C n.m.r. and h.p.l.c. Both methods gave similar results and have similar degrees of reproducibility. The n.m.r. method is useful for quantitation of sugars and identification of other molecules extracted from the food, but requires more material than does h.p.l.c. Drying at 40°C causes a decrease in sucrose content and increases in glucose, fructose and maltose which partly compensate for the loss in sucrose. There is considerable variability of the sugar content between different sweet potato tubers and between different taro corms of the same cultivar as well as across different cultivars. For sweet potato the total sugar content is 0.6-3.6% fresh weight, with considerably more sucrose present than glucose, fructose and maltose. With taro total sugar content is 0.2-0.8% fresh weight. Raffinose is present in one sample only.     

MR2004年收录《纺织高校基础科学学报》 统计结果分析

以美国《数学评论》(MR)2004年度索引为资料来源,对陕西入选的高校学报收录进行统计.结果表明,《纺织高校基础科学学报》(Basic Sci.J.Text.Univ.,ISSN 1006-8431)名列入选学报之首,有48篇论文被摘评,其中2003年40条,2004年第1期8条.     

仙人掌保健饮料的技术研究

本文对仙人掌的功效成分总多糖的测定方法进行了研究,对仙人掌保健饮料的生产工艺、配方技术进行了探讨。     

The distribution of anthocyanins in grape skin extracts of port wine cultivars as determined by high performance liquid chromatography

The distribution of anthocyanins in methanolic skin extracts of 16 grape cultivars used for port wine production and grown at five sites in the Douro Valley in Northern Portugal has been assessed by high performance liquid chromatography. Results are confined to the seven most readily separated and identified anthocyanins and are expressed as percentages of their total (88–99% of the total integrated area). Anthocyanins based on malvidin (Mv) predominated. Of these, Mv 3-glucoside was the major pigment (33–60%), being exceeded by Mv 3-p-coumarylglucoside (2–51%) in only two cultivars; Mv 3-acetylglucoside (1–15%) was consistently the lowest. Peonidin 3-glucoside (1–27%) was prominent in four cultivars, but delphinidin 3-glucoside (1–11%), petunidin 3-glucoside (2–11%) and cyanidin 3-glucoside (trace-6%) were of low proportions throughout. The ratio Mv 3-acetylglucoside/total Mv glucosides appeared characteristic of cultivar, independent of site, and a useful aid to identification of grape cultivars. The coloured pulp of some cultivars contained peonidin 3-glucoside as a major component, present in greater proportions than in the skin; the percentage of Mv 3-p-coumarylglucoside was lower in pulp than in skin. The identities of six of the seven anthocyanins were confirmed by fast atom bombardment mass spectrometry and the structures of the Mv derivatives were determined by nuclear magnetic resonance. The formation of formyl and acetyl anthocyanin artefacts is described.     

功能性红曲醋的研究

在进一步挖掘红曲保健功能的基础上,结合我国传统的保健调味品食醋,研制功能性红曲醋。在确定工艺路线后,首先进行醋酸菌的筛选工作,采用斜面分离纯化的方法得到所需的高纯度醋酸菌种子液,这其中历经两级种子的筛选方可将最终所得的醋酸菌接入发酵罐,得到所需产品。经检测,本产品呈棕红色,有光泽,具有发酵醋特有的香气,且无异味。醋液澄清无沉淀,其中酸度达4．9g／dL,还原糖2.30g／dL,盐分0．27g／dL,固形物11．88％。     

根霉发酵L-乳酸

本文报道了选育一株产L-乳酸的根霉JSMI-R73,对该菌的性能及影响产酸的条件进行了研究,并进行了500升罐的扩大试验。当口服葡萄糖浓度为10％时产酸70g/l以上,13％时产酸101g/l,其中L-乳酸稳定在85％以上,最高达98％。该菌能适应玉米作培养基,当玉米浓度为12％时产酸70g/l以上,20％时产酸105g/l以上,其中L-乳酸在88％以上,最高可达99％,达到了与葡萄糖相似的发酵水平,这是较有实用意义的结果。     

建筑光环境的构成及其审美价值

本文借享有国际盛誉的建筑实例,阐述了自然采光和人工照明对表现和塑造建筑形体轮廓、光影虚实和创造室内外空间环境气氛及意境的作用,同时对建筑光环境的构成作了简要的概括和总结,意在启发业界人士善于和巧于用光来美化建筑室内外空间,塑造优美环境。     

Presence of quercetin-3-O-glucuronoside in Spanish table wines

Quercetin-3-O-glucuronoside has been identified in several Spanish table wines by thin-layer (t.l.c.) and high-performance liquid (h.p.l.c.) chromatographic methods. This is thought to be the first report of its occurrence in wine.     

鬼针草利咽饮料的研究

采用蒸馏煮提法对鬼针草挥发油进行了提取。并用GC-MS法定性地分析了鬼针草中挥发性成分。采用合理的饮料配制工艺，研究开发鬼针草利咽饮料。