检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

稻米油脂遗传改良研究进展

浙江大学学报（农业与生命科学版） 2024年第3期50卷 329-338页

作者：王诗怡刘西西金龙应杰政李志永黄捷童晓红王以锋张健中国水稻研究所水稻生物育种全国重点实验室浙江杭州311400

脂肪是水稻种子不可或缺的营养成分,提升水稻种子中的油脂含量、优化其有益脂肪酸和抗氧化物质等关键组分是水稻品质育种的一大趋势。本文综述了稻米油脂的主要成分与功能、油脂合成与调控通路、稻米油脂的调控基因及遗传改良的研究进展... 详细信息

脂肪是水稻种子不可或缺的营养成分,提升水稻种子中的油脂含量、优化其有益脂肪酸和抗氧化物质等关键组分是水稻品质育种的一大趋势。本文综述了稻米油脂的主要成分与功能、油脂合成与调控通路、稻米油脂的调控基因及遗传改良的研究进展,旨在深化对稻米油脂生物合成的理解,并为未来创造高油脂、高品质水稻种质资源提供新的启示和方向。

关键词：水稻油脂含量品质遗传改良

近年我国水稻种子休眠与萌发调控机制研究进展

同方期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

中国稻米 2024年第4期30卷 1-6页

作者：唐思敏童晓红应杰政张健田志宏王以锋长江大学生命科学学院湖北荆州434025 中国水稻研究所/水稻生物育种全国重点实验室杭州310006

水稻种子的休眠与萌发是维持水稻产量和品质的重要农艺性状。水稻种子收获前较低的休眠水平易引起穗发芽,导致水稻产量和品质降低。另一方面,较高的休眠程度易引起水稻播种期的低发芽率和出苗不整齐,严重制约水稻的高产稳产。综述了202... 详细信息

水稻种子的休眠与萌发是维持水稻产量和品质的重要农艺性状。水稻种子收获前较低的休眠水平易引起穗发芽,导致水稻产量和品质降低。另一方面,较高的休眠程度易引起水稻播种期的低发芽率和出苗不整齐,严重制约水稻的高产稳产。综述了2020年以来国内在水稻种子休眠与萌发遗传调控领域取得的一系列重要进展,具体从植物激素、非生物胁迫和穗发芽调控机制展开,并对国外相关领域的研究作简要介绍,提出研究趋势和展望,以期阐明调控种子萌发的遗传特性和作用机理,为适宜休眠度的水稻新品种培育提供理论依据和优良基因资源。

关键词：水稻种子休眠萌发调控机制作物改良

数字信号处理技术在环境感知中的应用现状浅析

同方期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

时代汽车 2024年第12期 22-24页

作者：李小静童晓红刘汗青王宇帆合肥职业技术学院汽车工程学院安徽合肥238000

智能网联汽车作为近几年出现的新概念汽车产品,在保障日常出行的安全性和便利性方面发挥了巨大的作用。数字信号处理技术作为现如今数字化时代的一项主流技术,其应用领域也延伸到了智能网联汽车的环境感知技术当中,文章在详细分析数字... 详细信息

智能网联汽车作为近几年出现的新概念汽车产品,在保障日常出行的安全性和便利性方面发挥了巨大的作用。数字信号处理技术作为现如今数字化时代的一项主流技术,其应用领域也延伸到了智能网联汽车的环境感知技术当中,文章在详细分析数字信号处理技术基本原理的基础上,对其在智能网联汽车环境感知技术中的应用现状进行了总结分析,对数字信号处理技术助力智能网联汽车的发展,实现无人驾驶甚至自动驾驶具有现实意义。

关键词：智能网联汽车数字信号处理技术环境感知技术应用现状

维普期刊数据库博看期刊

Cryptanalysis of the One-Time Proxy Signature Scheme Used in Mobile Agents

在线全文

学校读者我要写书评

暂无评论

Wuhan University Journal of Natural Sciences 2005年第1期10卷 183-185页

作者： FUXiao-tong xiaohong XIAOGuo-zhen Nationa｜KeyLaboratoryofIntegratedServiceNetworks XidianUniversityXi＇an710071ShaanxiChina

We ayptanalyze Kim et. al's one-time proxy signature scheme used in mobileagents, and then a successful forgery is introduced It is showed that a dishonest customer cansuccessfully forge a valid one-time proxy signature by impersonating the stiver Furthermore, he canrequest the server with responsibility for the forged bidding information.

关键词： cryptanalysis proxy signature one-time proxy signature

在线全文

学校读者我要写书评

暂无评论

大豆GmHSF21基因的生物信息学分析

大豆科技 2024年第1期 13-20,58页

作者：宋勇泽刘汝翠朱永胜李月姜妍佟晓红王绍东王遂东北农业大学农学院哈尔滨150030 克东禹王大豆蛋白食品有限公司黑龙江克东164800 黑龙江九阳豆业有限公司黑龙江大庆166200 杭州九阳豆业有限公司杭州310018

植物热激转录因子(Heat shock transcription factor,HSFs)在参与高温、干旱及盐碱等逆境胁迫方面发挥重要作用。为探究大豆GmHSF21基因在盐胁迫应答中的作用,文章以大豆品种中黄13前期盐胁迫处理下的转录组差异基因数据为研究对象,对大... 详细信息

植物热激转录因子(Heat shock transcription factor,HSFs)在参与高温、干旱及盐碱等逆境胁迫方面发挥重要作用。为探究大豆GmHSF21基因在盐胁迫应答中的作用,文章以大豆品种中黄13前期盐胁迫处理下的转录组差异基因数据为研究对象,对大豆HSF基因家族中的候选基因GmHSF21进行生物信息学分析。结果表明,GmHSF21属大豆HSF基因家族中的A亚族,共编码341个氨基酸,其编码区存在4处多态性位点,具有保守的HSF和HSF DNA-binding基序。系统发育分析表明,AT3G22830与GmHSF21亲缘关系近。顺式作用原件分析表明该基因启动子区具有响应多种生物及非生物胁迫的作用元件。荧光定量PCR结果显示该基因在盐胁迫条件下表达量上调,与转录组结果基本一致。

关键词：大豆 HSF家族盐胁迫生物信息学分析

The OsNAC23-Tre6P-SnRK1 a feed-forward loop regulates sugar homeostasis and grain yield in rice

在线全文

学校读者我要写书评

暂无评论

Molecular Plant 2022年第4期15卷 706-722页

作者： Zhiyong Li Xiangjin Wei xiaohong tong Juan Zhao Xixi Liu Huimei Wang Liqun Tang Yazhou Shu Guanghao Li Yifeng Wang Jiezheng Ying Guiai Jiao Honghong Hu Peisong Hu Jian Zhang State Key Lab of Rice Biology China National Rice Research InstituteHangzhou 311400China College of Life Science and Technology Huazhong Agricultural UniversityWuhan 430070China

Tre6P(trehalose-6-phosphate)mediates sensing of carbon availability to maintain sugar homeostasis in plants,which underpins crop yield and ***,how Tre6P responds to fluctuations in sugar levels and regulates the utilization of sugars for growth remains to be ***,we report that the sugar-inducible rice NAC transcription factor OsNAC23 directly represses the transcription of the Tre6P phosphatase gene TPP1 to simultaneously elevate Tre6P and repress trehalose levels,thus facilitating carbon partitioning from source to sink ***,OsNAC23 and Tre6P suppress the transcription and enzyme activity of SnRK1a,a low-carbon sensor and antagonist of OsNAC23,to prevent the SnRK1a-mediated phosphorylation and degradation of ***,OsNAC23,Tre6P,and SnRK1a form a feed-forward loop to sense sugar and maintain sugar homeostasis by transporting sugars to sink ***,plants over-expressing OsNAC23 exhibited an elevated photosynthetic rate,sugar transport,and sink organ size,which consistently increased rice yields by 13%–17%in three elite-variety backgrounds and two locations,suggesting that manipulation of OsNAC23 expression has great potential for rice ***,these findings enhance our understanding of Tre6P-mediated sugar signaling and homeostasis,and provide a new strategy for genetic improvement of rice and possibly also other crops.

关键词： Tre6P sugar homeostasis carbon partitioning NAC transcription factor grain yield rice

A review on the chemo-catalytic conversion of cellulose to bio-ethanol

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Chemical Engineering 2024年第3期5卷 276-289页

作者： Xiuzheng Zhuang Haiyong Wang Shugen Jiang xiaohong Hu tong Su Xinghua Zhang Longlong Ma Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and Environment Southeast University Key Laboratory of Renewable Energy Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Wuzhou Refrigeration Group Co.Ltd.

While the industry has produced sugar-derived ethanol from the conventional method of fermentation for hundreds of years, other effective routes involving the direct transformation of carbohydrates still remain extremely rare. Very recently, an innovative chemo-catalytic method driven by the aqueous-phase catalysis was created for the synthesis of cellulosic ethanol, making a great breakthrough in the common ways as it can theoretically utilize all of the carbon atoms in sugars with faster kinetics; up to now, results from the relevant studies have been accumulated to a certain extent, but the periodic conclusions in this field are unfortunately absent. For this reason,this work tries to offer an overview of the cellulosic ethanol produced by chemo-catalytic routes, highlighting the present knowledge in relation to the technical efficiency, catalytic mechanisms as well as practical applications. At first, the advanced progress on the increasing efficiency from a varied type of catalytic systems are extensively discussed, which involves the specific functions of hybrid components from different strategies; meanwhile, the general influences of processing conditions, such as the hydrothermal severity and aqueous environments, are also identified. Subsequently, possible mechanisms behind the chemo-catalytic processes are widely elaborated by analyzing a number of experimental cases associated with the reaction network and its kinetic models. After that,the actual effects of this technique on the real biomass are collected to identify the positive/negative interactions between multiple components, together with the potential solutions on the semi-continuous processes of pilot scale application. The techno-economic analysis(TEA) is also calculated and compared with other similar methods, such as fermentation and gasification. Finally, several proposals aimed at upgrading the whole chain of chemo-catalytic processes are clearly provided, which may function as a guideline f

关键词： Cellulosic ethanol Chemo-catalytic method Influencing factors Catalytic mechanism Techno-economic analysis

电针结合希协舟巴散对抗精神病药物所致便秘的疗效观察

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

精神医学杂志 2024年第1期37卷 14-17页

作者：刘雯婧童晓红汪海燕高玮白树存次成达杰俄才仁公却西然青海省第三人民医院青海西宁810007 玉树州第三人民医院

目的探讨电针结合藏药希协舟巴散在治疗抗精神病药物所致便秘中的疗效。方法将140例抗精神病药物相关便秘(APRC)病例随机分为乳果糖组、电针组、藏药组、电针+藏药组,每组各35例。所有患者在常规口服抗精神病药物基础上给予治疗,乳果糖... 详细信息

目的探讨电针结合藏药希协舟巴散在治疗抗精神病药物所致便秘中的疗效。方法将140例抗精神病药物相关便秘(APRC)病例随机分为乳果糖组、电针组、藏药组、电针+藏药组,每组各35例。所有患者在常规口服抗精神病药物基础上给予治疗,乳果糖组给予乳果糖口服,电针组给予天枢、腹结、上巨虚电针疗法,藏药组口服希协舟巴散,电针+藏药组在口服希协舟巴散的同时配合天枢、腹结、上巨虚电针疗法,疗程均为8周。治疗结束后评价各组患者临床疗效,采用便秘症状积分、Bristol粪便性状量表(BSFS)、便秘生存质量量表(PAC-QOL)、简明精神病评定量表(BPRS)和治疗不良反应量表(TESS)比较四组治疗前后排便状况、大便性状、精神症状及不良反应情况。结果治疗8周后,电针+藏药组临床总有效率高于乳果糖组、电针组、藏药组(P<0.05)。治疗8周后,四组各项症状积分、PAC-QOL评分均较治疗前降低(P<0.05),BSFS评分均较治疗前升高(P<0.05),电针组、藏药组、电针+藏药组BPRS评分均较治疗前降低(P<0.05)。电针+藏药组各项症状积分、PAC-QOL、BPRS评分低于乳果糖组、电针组、藏药组(P<0.05),电针+藏药组BSFS评分高于乳果糖组、电针组、藏药组(P<0.05),电针组、藏药组BPRS评分低于乳果糖组(P<0.05)。电针组、藏药组、电针+藏药组不良反应率和TESS评分均低于乳果糖组(P<0.05)。结论针对抗精神病药物所致便秘患者,应用电针结合藏药希协舟巴散疗效确切,可有效促进排便能力恢复,对患者精神症状亦有改善,且不良反应较小,疗效优于电针和希协舟巴散单独应用。

关键词：抗精神病药物相关便秘电针藏药希协舟巴散

Synergistic silver-mediated and palladium-catalyzed nondirected olefination of aryl C–H bond: quick access to multi-substituted aryl olefins

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第3期67卷 882-889页

作者： Jian Yao Lili Shao xiaohong Huo Xiaoming Wang Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative MoleculesSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 20032China School of Chemistry and Materials Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China

Transition metal-catalyzed olefination of aryl C-H bond is a powerful tool for the synthesis of alkenes. While the Pd-catalyzed oxidative C-H olefination of arenes, also known as Fujiwara-Moritani reaction, has been established as one of the most efficient methods, the substrates are largely limited to terminal olefins with electron-withdrawing group(s). Herein, we report a synergistic silver-mediated and palladium-catalyzed non-directed C-H olefination of arenes with vinyl(pseudo)halides, which offers a complementary strategy to the typical Fujiwara-Moritani reaction. The reactions proceeded well for a variety of halogenated arenes, heteroarenes, and olefin substrates, providing an efficient access to various multi-substituted aryl olefins, including trisubstituted/tetrasubstituted olefins and several complex olefins derived from medicines or natural products. Mechanistic studies indicated a bimetallic Pd/Ag cooperation is operative in the catalysis, i.e., the reaction is initiated by aryl C-H bond cleavage via ligation with phosphine/Ag species, followed by transferring of the aryl moiety to a vinyl palladium intermediate,which is in turn formed by oxidative addition of vinyl(pseudo)halide to a Pd complex. This method enables the synthesis of a wide range of challenging multi-substituted vinyl products from simple arenes(directing-group free) in a streamlined and controllable fashion.

关键词： direct C–H olefination multi-substituted aryl alkenes bimetallic Pd/Ag cooperation C–H functionalization