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植物基因工程及其在花生遗传改良上的应用研究近况 总被引:2,自引:0,他引:2
本文从目的基因的分离,外源基因的转化和植株再生等三个方面,概述了植物基因工程及其应用于花生遗传改良的研究近况。并对将植物基因工程技术尽快应用于花生品种改良的实践。提出粗浅看法。 相似文献
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缺铁性贫血依然为全球目前所面临的公共健康营养问题之一,而铁营养作用的发挥与其吸收利用度密切相关。植物铁蛋白以其独特的笼形结构,在补铁方面拥有广阔的应用前景。该研究主要综述人体对各种来源的铁的吸收途径,以及植物铁蛋白的结构及其补铁特性。关于机体铁吸收的途径着重从血红素铁及Fe2+、Fe3+、铁蛋白等非血红素铁的角度介绍人体对不同来源铁的吸收方式,并进一步介绍影响铁吸收的因素;之后对植物铁蛋白的基本结构及其与动物铁蛋白相比之下的特殊结构进行阐述;最后针对植物铁蛋白在细胞实验、动物实验及临床研究等各方面的补铁特性以及其在纳米包埋领域的应用进行总结。该综述旨在为机体铁代谢及植物铁蛋白营养特性的深入研究奠定一定的基础。 相似文献
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植物甾醇的研究进展与趋向(Ⅰ)——植物甾醇的基础研究 总被引:3,自引:0,他引:3
当前关于植物甾醇的基础研究进展表明,利用基因工程调控植物油料中甾醇含量与组成、揭示植物甾醇影响胆固醇的合成与相关基因表达的机理、明晰植物甾醇在植物衰老中的作用是植物甾醇基础研究工作的三个重要课题. 相似文献
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植物甾醇的研究进展与趋向(I)——植物甾醇的基础研究 总被引:16,自引:1,他引:16
当前关于植物甾醇的基础研究进展表明,利用基因工程调控植物油料中甾醇含量与组成、揭示植物甾醇影响胆固醇的合成与相关基因表达的机理、明晰植物甾醇在植物衰老中的作用是植物甾醇基础研究工作的三个重要课题。 相似文献
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盐渍土是指土壤中含有较多的盐碱物质,并在这些盐碱物质作用下,成为不同程度盐化和碱化土壤的总称.植物在盐渍土中不易生长繁殖,本文综述了盐渍土改良的工程、农业、化学、生物等主要措施以及其国内外的研究现状;重点概述了生物措施中利用盐生植物改良盐渍土的机理和研究现状. 相似文献
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Anihita Seth Mariana Diaz Raymond R Mahoney 《Journal of the science of food and agriculture》1999,79(13):1958-1963
The objective of this work was to compare the solubilisation of iron by in vitro digests of soluble and insoluble protein fractions from chicken muscle. Chicken breast muscle was extracted to provide dilute salt-soluble protein (DSSP) and dilute salt-insoluble protein (DSIP) fractions. These fractions together with casein and ovalbumin were subjected to in vitro digestion in the presence of ferric iron. After proteolytic digestion, soluble iron increased fourfold for DSSP, 20-fold for DSIP, twofold for casein and 0.5-fold for ovalbumin. 64% of the soluble iron in the DSSP digest and 30% of the soluble iron in the DSIP digest were ferrous; in the casein and ovalbumin digests, less than 6% was ferrous. Dialysable iron was less than 5% of the soluble iron for all proteins and was mostly ferric iron. DSIP solubilised twice as much iron as DSSP but much less than casein or ovalbumin digests. It was concluded that muscle proteins solubilise iron by reduction and chelation to mostly large (non-dialysable) peptides resulting from digestion. © 1999 Society of Chemical Industry 相似文献
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基因工程已广泛地应用于微生物的菌种改造与构建。本文着重介绍了利用基因工程对不同性能的啤酒酵母进行构建的研究情况,并提出了啤酒酵母工程菌的发展前景。 相似文献
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考察了3种铁营养强化剂对豆奶粉感官和酸度等理化指标的影响。通过"三点检验"试验表明,添加乙二胺四乙酸铁钠(NaFeEDTA)的豆奶粉和没有添加铁强化剂的豆奶粉在感官上没有显著差异,而添加了乳酸亚铁和硫酸亚铁的奶粉,却存在显著差异。采用"量值估计法"对添加NaFeEDTA、乳酸亚铁、硫酸亚铁的豆奶粉进行评分表明,3种铁强化剂对无糖和含糖豆奶粉的外观颜色、组织状态和冲调性无显著影响,含NaFeEDTA豆奶粉在气味、滋味方面的感官评价得分要明显高于乳酸亚铁和硫酸亚铁。通过理化检测发现,各种铁强化剂对豆奶粉的酸度和含水量几乎无影响。 相似文献
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基因工程在啤酒行业育种中的应用 总被引:3,自引:0,他引:3
阐述了国外基因工程技术在啤酒行业育种中的应用,希望国内啤酒行业和相关研究机构开展这方面的研究,加强产、学、研结合,增强与国外的技术合作,加快科学技术转化为生产力 相似文献
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Improving Electrochemical Performance of Cellulose Fiber-based Supercapacitor Electrode Using Polypyrrole-wrapped Iron Oxyhydroxide 下载免费PDF全文
Polypyrrole (PPy)@cellulose fiber-based composites have been widely investigated as electrode materials for use in flexible supercapacitors. However, they cannot readily provide high specific capacitance and cyclic stability owing to their inherent drawbacks, such as high resistance, Weber impedance, and volume expansion or collapse during charging/discharging. In this study, iron oxyhydroxide (FeOOH) is incorporated in the abovementioned composite to decrease the equivalent series resistance, charge transfer resistance, and Weber impedance, thereby enhancing electron transfer and ion diffusion, which results in superior electrochemical performance. The PPy-wrapped FeOOH@cellulose fiber-based composite electrode with the molar ratio of FeSO4 to NaBH4 of 1∶1 exhibits a high specific capacitance of 513.8 F/g at a current density of 0.2 A/g, as well as an excellent capacitance retention of 89.4% after 1000 cycles. 相似文献
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Kalpana Platel 《Critical reviews in food science and nutrition》2016,56(10):1608-1619
Deficiencies of iron, zinc, iodine and vitamin A are widespread in the developing countries, poor bioavailability of these micronutrients from plant-based foods being the major reason for their wide prevalence. Diets predominantly vegetarian are composed of components that enhance as well as inhibit mineral bioavailability, the latter being predominant. However, prudent cooking practices and use of ideal combinations of food components can significantly improve micronutrient bioavailability. Household processing such as heat treatment, sprouting, fermentation and malting have been evidenced to enhance the bioavailability of iron and β-carotene from plant foods. Food acidulants amchur and lime are also shown to enhance the bioavailability of not only iron and zinc, but also of β-carotene. Recently indentified newer enhancers of micronutrient bioaccessibility include sulphur compound-rich Allium spices—onion and garlic, which also possess antioxidant properties, β-carotene-rich vegetables—carrot and amaranth, and pungent spices—pepper (both red and black) as well as ginger. Information on the beneficial effect of these dietary compounds on micronutrient bioaccessibility is novel. These food components evidenced to improve the bioavailability of micronutrients are common ingredients of Indian culinary, and probably of other tropical countries. Fruits such as mango and papaya, when consumed in combination with milk, provide significantly higher amounts of bioavailable β-carotene. Awareness of the beneficial influence of these common dietary ingredients on the bioavailability of micronutrients would help in devising dietary strategies to improve the bioavailability of these vital nutrients. 相似文献
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建立CRISPR-Cas9介导的在Saccharomyces cerevisiae双倍体细胞中进行基因敲除的方法。以can1基因敲除后的表型验证该CRISPR-Cas9系统的有效性,can1基因的失活效率达到4%。利用该系统又分别敲除了pdc、adh3、adh2、adh1、 pdh等基因,单基因编辑效率分别为4/48、3/48、1/48、3/28、1/16。确定了基因连续敲除的方法流程,pdc、adh3、adh2三个基因全部敲除,整个过程用时17 d。探索了双基因一次转化同时敲除的方法,将adh5、lip两个基因同时敲除用时6 d,基因编辑效率分别为9/32和10/32。 相似文献