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通过对前纺设备重定量、高速度技术状态分析和牵伸工艺理论分析,提出三个同步发展概念,即胶辊、胶圈技术与棉纺工程技术、握持力与牵伸力、胶辊与胶圈同步发展。胶辊应具有高弹性、低硬度、高耐磨、表面不处理特性,胶圈应具有高耐磨、高抗屈、高弹性、低硬度、表面低粗糙度,胶辊、胶圈均应具有良好的长久的稳定性。 相似文献
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酒精酵母菌株基本性能检测 总被引:1,自引:0,他引:1
介绍了酒精酵母A、B、C、D、E的基本性能检查方法及实验结果,结果表明,在综合性能上,菌株A、B具有出酒率高,发酵力强,残糖低,残淀低,耐酒度高的特点。 相似文献
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镁合金作为目前最轻的金属材料,具有密度小、比强度和比刚度高、良好的导电性、导热性、减震性等优点.因此,镁合金结构件在汽车、飞机、计算机及通讯设备上获得了广泛的应用.低熔点、低比热、低相变潜热以及与铁的强亲和力等特点,使镁合金具有耗能少、充型速度快、凝固速度快、实际压铸周期短、磨具使用寿命长等优势。因此,收 相似文献
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氨化处理法改良低次烤烟质量的研究 总被引:2,自引:2,他引:2
进行了低次烤烟氨化处理实验研究。结果表明,经氨化处理后的低次烤烟可以产生浓郁、醇和的白肋烟香味特征,将其加入混合型卷烟配方中,可以替代白肋烟的使用,改变原配方中的青杂气,有谐调烟气、抑制刺激的作用,为低次烤烟的综合利用提供了一个新思路,具有潜在的经济效益和较好的应用前景。 相似文献
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在纺织橡胶制品中采用高强低仲骨架材料,替代传统的棉纱线或涤棉纱线,使产品具有强力高、伸长低、寿命长等特点:本文通过新颖复合包缠装置的设计和工艺技术的探讨,制备适合于纺织橡胶产品的高强低伸骨架材料。 相似文献
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冬瓜为葫芦科草本植物,味甘淡,性寒,清香爽口,具有利水、清热、化痰、解渴等功效。冬瓜中含有丙醇二酸类物质,能有效控制体内的糖类转化为脂肪,从而防止体内脂肪的堆积,再加上冬瓜水分高、纤维素较多,产热量低,含钾量高、含钠量低,因此具有很好的减肥功效。本文研制了新型低糖冬瓜果脯、低糖冬瓜果酱和冬瓜丝夹心糖。 相似文献
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Bingjian Du Yi Song Xiaosong Hu Xiaojun Liao Yuanying Ni Quanhong Li 《International Journal of Food Science & Technology》2011,46(5):982-987
As a rich source of polysaccharides, pumpkin pulp was used for the production of oligosaccharides. To investigate the prebiotic potential of the oligosaccharides, prepared by acid hydrolysis of polysaccharides from pumpkin pulp, the effect of the oligosaccharides on lactobacilli growth was studied. The oligosaccharides were composed of galactose (99.03%) and glucose (0.97%). The molecular weight distribution of the oligosaccharides showed a larger part of low molecular weight fraction in a range from 5000 to 324 Da than the polysaccharides, which gave the oligosaccharides higher solubility. The oligosaccharides showed good resistance to hydrolysis by artificial human gastric juice and α‐amylase, compared to the reference prebiotic inulin, and considerable capability to stimulate the growth of lactobacilli. In vitro studies showed that the number of lactobacilli was significantly greater than those in control medium when they were cultured in the medium supplemented with the oligosaccharides (P < 0.05), and there was no significant difference at the oligosaccharides group and the inulin group (P < 0.05). 相似文献
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《International Dairy Journal》2006,16(11):1341-1346
Human milk contains a large variety of oligosaccharides (HMOs) with the potential to modulate the gut flora, to affect different gastrointestinal activities and to influence inflammatory processes. Human intervention or clinical studies are still missing as the large amounts of milk oligosaccharides needed are not yet available. Therefore, there is great interest in sources of oligosaccharides other than those from human milk. Although the amount of oligosaccharides in milk of most animal species is low compared with human milk, recent data indicate significant differences among milk from farm animals. Whether some of these oligosaccharides are good candidates for human studies needs to be further investigated. Currently, there is only a limited amount of quantitative data on the total amount of oligosaccharides and on individual components in animal milk, e.g., in bovine, goat or buffalo milk. Regarding biological functions certain structural prerequisites are necessary for milk oligosaccharides to be effective in different in vitro systems. Often prebiotic oligosaccharides (PBOs) from plants are obtained by technological means and are considered to be similar or even identical to HMOs. However, there is no evidence for this speculation as PBOs are structurally quite different from HMOs. Whether PBOs exert comparable functional effects remains to be investigated. If this were the case their addition to infant formula may be useful in the context of mimicking biological functions of human milk constituents. 相似文献
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我国海藻资源极其丰富,但目前其利用主要集中于食品、饲料和保健品生产等少数方面,海藻资源的高值化利用途径有待进一步开发。海藻多糖是海藻细胞壁重要组分,具有多种生物活性功能,但因其聚合度高、黏度大、溶解性差,很难被机体吸收利用。海藻多糖经物理、化学、生物等方法可降解为海藻寡糖,其溶解性和生理学活性显著提升,更适合应用于食品、保健品、饲料、农业等诸多领域。基于酶法开发海藻寡糖绿色制备技术,具有传统方法不可比拟的优势,效率高、成本低、污染少。作者综述了褐藻寡糖、琼胶寡糖、卡拉胶寡糖、岩藻寡糖等海洋寡糖的生理活性及酶法转化的研究进展,为海藻资源的高值化利用提供新思路。 相似文献
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Daniela Barile Nannan Tao Carlito B. Lebrilla Jean-Daniel Coisson Marco Arlorio J. Bruce German 《International Dairy Journal》2009,19(9):524-530
Previously undescribed oligosaccharides in bovine cheese whey permeate were characterized by a combination of nanoelectrospray Fourier transform ion cyclotron resonance (nESI-FTICR) mass spectrometry and matrix-assisted laser desorption/ionization Fourier transform ion cyclotron resonance (MALDI-FTICR) mass spectrometry. Oligosaccharide composition was elucidated by collision-induced dissociation within the ICR cell. In addition to sialyllactose (the most abundant oligosaccharide in bovine colostrum), we identified 14 other oligosaccharides, half of which have the same composition of human milk oligosaccharides. These oligosaccharides could potentially be used as additives in infant formula and products for the pharmaceutical industry. Because whey permeate is a by-product from the production of whey protein concentrate (WPC) and is readily available, it is an attractive source of oligosaccharides for potential application in human nutrition. 相似文献
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大豆低聚糖胀气现象观察 总被引:4,自引:0,他引:4
本文将大豆低聚糖、改性大豆低聚糖、代聚果糖选择3种剂量高、中、低,分别进行小白鼠试验,观察3种低聚糖的胀气现象。试验结果表明:改性大豆低聚糖无胀气现象;低聚果糖在给人实际用量30倍剂量下有轻度的胀气现象;大豆低聚糖的情况与代聚果糖相似,但胀气作用较低聚果糖轻。 相似文献
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寡糖是具有2~10 个单糖残基通过糖苷键连接起来的直链或含分支链的糖类化合物,对人体健康有诸多益处,还具有甜味剂功能和特性,集营养、保健、食疗于一体。相较于多糖,寡糖还具有生物活性强、利于机体吸收等优点。近年来,海洋来源的寡糖被证明具有多种生物活性,包括抗氧化、抗肿瘤、抗炎、抗菌、抗凝血和提高免疫力等,可以广泛应用于食品、医药、化妆品、农业和水产等领域。本文介绍了4 种主要的海洋寡糖,包括几丁寡糖/壳寡糖、褐藻胶寡糖、琼胶寡糖和卡拉胶寡糖,简述其来源、结构特征、各种生物活性及应用,以期为海洋多糖资源的高价值利用及海洋寡糖的深度开发提供参考。 相似文献
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功能性寡糖是不易被肠道吸收,但却能改善肠道健康的一类碳水化合物。近年来,人们关于功能性寡糖的生物活性,尤其是在寡糖对肠道健康的影响方面,开展了广泛地研究。功能性寡糖可通过提高消化酶活性、改善肠道组织及产生乳酸等方式来促进肠道对营养物质和矿物元素的吸收,也可通过调节肠道菌群、改善肠道组织、增加短链脂肪酸的产生等途径来缓解代谢综合症、减轻炎症、增强免疫反应以及改善肠道黏膜屏障等,为肠道提供一个良好的内部环境。本文对功能性寡糖的肠道健康调控作用进行了综述,以期为功能性寡糖的深入研究与应用提供理论依据。 相似文献
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作为极具中国民族特色的传统酿造酒,黄酒以稻谷、麦曲、酒药等为原料,经传统发酵工艺酿造而成,含有包括氨基酸、多肽、多糖、低聚糖、酯类物质等在内的多种生物活性物质。酿造过程中,在酒曲微生物作用下,酿造体系产生种类丰富的黄酒低聚糖,具有独特的功效。黄酒低聚糖是由3~10个单糖通过糖苷键连接形成的直链或支链的低度聚合糖类,具有缓解机体便秘、治疗肥胖、治疗肠道炎症等功能。目前主要探究了黄酒低聚糖的含量检测,尚未对其肠道调节功能进行探究。该文对黄酒酿造工艺、原料稻米与小麦酶解工艺、酒曲微生物代谢、低聚糖检测方法等最新研究进行了全面的分析,详细论述了黄酒低聚糖的来源、种类与检测现状,同时论述了膳食低聚糖对便秘、肠道炎症及肥胖的作用机理,旨在为黄酒低聚糖后续功能研究提供理论支撑。 相似文献