共查询到20条相似文献,搜索用时 125 毫秒
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苯哒嗪丙酯:为中国农业大学应用化学学院研制开发的、具有我国自主知识产权的一种新型低毒植物生长调节剂(小麦去雄剂),制剂为10%苯哒嗪丙酯乳油,商品名达优麦。该药能诱导自交作物雄性不育,培育杂交种子,主要用于小麦育种,具有优良的选择性小麦去雄效果。田间药效试验表明,该药施药适期为小麦幼穗发育的雌雄蕊原基分化期至药隔后期,1次喷药,用药量为每667平方米用有效成分50~66.6克(折成10%乳油商品量为500~666克/667m^2,一般加水30~40千克),喷施于小麦母木植株,具有诱导小麦雄性不育彻底,提高小麦去雄质量,达到杂种小麦制种纯度要求。对小麦的生长发育无不良影响,且施药适期较长。在施药剂量范围内,随着施药剂量的升高,小麦去雄效果越好,不育率可达95%以上,效果比较理想。可大大降低小麦育种过程中人工去雄的工作量,节省劳力。 相似文献
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介绍了一类具有杀虫、杀螨和杀线虫活性的新型化合物1,3,4-恶二嗪及其衍生物5-酮。它们对棉红蜘蛛、烟芽夜蛾的活性高于目前商品化的四螨嗪和硫双灭多威。酮衍生物还对线虫有特殊的防治效果。文章还介绍了此类化合物的合成方法。 相似文献
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以氟螨嗪为先导化合物,设计、合成了4个四嗪吡唑类新化合物,通过1~H NMR、元素分析确证了结构。对螨卵的活性测定结果显示,在10 mg/L质量浓度下,新化合物9a、9b对朱砂叶螨螨卵活性分别为86%、83%,远高于对照药剂氟螨嗪。 相似文献
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建立了一条合成哒嗪类小麦化学杂交剂1-对氯苯基-1,4-二氢-4-氧代-6-乙基哒嗪-5-羧酸的合成路线.以对氯苯胺为主要原料,经过五步工艺合成杀雄嗪酸,合成工艺成本低,反应条件温和,适合工业化生产.通过对工艺的优化,并对化合物的分离和纯化条件进行了摸索和改进,取得了较好的实验结果.1-对氯苯基-1,4-二氢-4-氧代... 相似文献
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综述了桉叶提取物的一般应用研究进展及其生物活性物质(芦丁、槲皮素等)在医药领域作为药物前体物的的应用研究进展,展望了桉叶在环境减毒领域的应用前景,并介绍了桉叶活性物质的常见提取方法。 相似文献
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Mohsen Akbarian Ali Khani Sara Eghbalpour Vladimir N. Uversky 《International journal of molecular sciences》2022,23(3)
Bioactive peptides are a group of biological molecules that are normally buried in the structure of parent proteins and become active after the cleavage of the proteins. Another group of peptides is actively produced and found in many microorganisms and the body of organisms. Today, many groups of bioactive peptides have been marketed chemically or recombinantly. This article reviews the various production methods and sources of these important/ubiquitous and useful biomolecules. Their applications, such as antimicrobial, antihypertensive, antioxidant activities, blood-lipid-lowering effect, opioid role, antiobesity, ability to bind minerals, antidiabetic, and antiaging effects, will be explored. The types of pathways proposed for bioactive applications will be in the next part of the article, and at the end, the future perspectives of bioactive peptides will be reviewed. Reading this article is recommended for researchers interested in various fields of physiology, microbiology, biochemistry, and nanotechnology and food industry professionals. 相似文献
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金属增强生物玻璃陶瓷的研究状况及展望 总被引:5,自引:0,他引:5
本文综述了目前国内外金属增强无机生物活性材料的发展状况,分析了各种增强方法的优缺点,并指出了今后发展的趋势及需要解决的问题。 相似文献
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概述了羟基磷灰石的合成方法以及国内外关于羟基磷灰石复合材料的研究进展,并对其发展方向作了展望。 相似文献
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Jian Chen Xin Fan Zhongcheng Zhou Jianpeng Zou 《Polymer-Plastics Technology and Engineering》2013,52(11):1155-1162
PLGA/bioactive glass composites were prepared as promising bone-repairing materials. The bioactive glass was fabricated by Sol-gel method. Surface Modification was done to improve the phase compatibility between polymer and the inorganic phase. PLGA/bioactive glass composites were successfully prepared via solution dispersion method. Composites films with different content of bioactive glass were obtained. The mechanical properties of composites were characterized by the three-point-bending test and composites films were investigated by in vitro bioactive test. These results indicate that the fractions of bioactive glass in composites produce no significant influence on mechanical properties. Compared to pure PLGA film the PLGA/bioactive glass composites demonstrate greater capability to induce the formation of apatite particles on the film surface. 相似文献
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以DCC作缩合剂、DMAP作催化剂,羽扇豆醇和肉桂酸在二氯甲烷中室温反应24 h合成了生物活性天然产物羽扇豆醇肉桂酸酯,收率为86.5%。产物的结构经1H NMR和ESI-MS确证。 相似文献