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Bioengineering Downstream Technology Online Open Course Drives SPOC Hybrid Teaching Reform Based on Ideological and Political Education
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作者 Jiedan Liao 《Journal of Contemporary Educational Research》 2024年第9期17-24,共8页
In the context of emerging engineering disciplines,a hybrid teaching reform for the Bioengineering Downstream Technology course,based on ideological and political education and online open courses,is being carried out... In the context of emerging engineering disciplines,a hybrid teaching reform for the Bioengineering Downstream Technology course,based on ideological and political education and online open courses,is being carried out.This reform focuses on aspects such as“building a professional teacher team for ideological and political education,scientifically designing the ideological and political teaching system,innovating classroom teaching methods,and improving both formative and summative evaluation systems.”The“Craftsmanship in Education and Cultivating Soul and Roots”small private online course hybrid teaching reform for the Bioengineering Downstream Technology online open course provides a replicable model for the comprehensive implementation of ideological and political education in engineering courses and offers a reference for advancing ideological and political education and hybrid teaching reform in new engineering disciplines. 展开更多
关键词 Bioengineering Downstream technology Ideological and political Online open course hybrid teaching
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Innovation and development of the third-generation hybrid rice technology 被引量:8
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作者 Chancan Liao Wei Yan +3 位作者 Zhufeng Chen Gang Xie Xing Wang Deng Xiaoyan Tang 《The Crop Journal》 SCIE CSCD 2021年第3期693-701,共9页
The breeding and large-scale application of hybrid rice contribute significantly to the food supply worldwide.Currently,hybrid seed production uses cytoplasmic male sterile(CMS)lines or photoperiod/thermo-sensitive ge... The breeding and large-scale application of hybrid rice contribute significantly to the food supply worldwide.Currently,hybrid seed production uses cytoplasmic male sterile(CMS)lines or photoperiod/thermo-sensitive genic male sterile(PTGMS)lines as female parent.Despite huge successes,both systems have intrinsic problems.CMS systems are mainly restricted by the narrow restorer resources that make it difficult to breed superior hybrids,while PTGMS systems are limited by conditional sterility of the male sterile lines that makes the propagation of both PTGMS seeds and hybrid seeds vulnerable to unpredictable climate changes.Recessive nuclear male sterile(NMS)lines insensitive to environmental conditions are widely distributed and are ideal for hybrid rice breeding and production,but the lack of effective ways to propagate the pure NMS lines in a large scale renders it impossible to use them for hybrid rice production.The development of"the third-generation hybrid rice technology"enables efficient propagation of the pure NMS lines in commercial scale.This paper discusses the establishment of"the thirdgeneration hybrid rice technology"and further innovations.This new technology breaks the limitations of CMS and PTGMS systems and will bring a big leap forward in hybrid rice production. 展开更多
关键词 hybrid rice Nuclear male sterile line The third-generation hybrid rice technology Pollen inactivation Seed sorting
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The 8×10 GHz Receiver Optical Subassembly Based on Silica Hybrid Integration Technology for Data Center Interconnection 被引量:3
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作者 Chao-Yi Li Jun-Ming An +8 位作者 Jiu-Qi Wang Liang-Liang Wang Jia-Shun Zhang Jian-Guang Li Yuan-Da Wu Yue Wang Xiao-Jie Yin Yong Li Fei Zhong 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第10期39-43,共5页
An 8×10 GHz receiver optical sub-assembly (ROSA) consisting of an 8-channel arrayed waveguide grating (AWG) and an 8-channel PIN photodetector (PD) array is designed and fabricated based on silica hybrid in... An 8×10 GHz receiver optical sub-assembly (ROSA) consisting of an 8-channel arrayed waveguide grating (AWG) and an 8-channel PIN photodetector (PD) array is designed and fabricated based on silica hybrid integration technology. Multimode output waveguides in the silica AWG with 2% refractive index difference are used to obtain fiat-top spectra. The output waveguide facet is polished to 45° bevel to change the light propagation direction into the mesa-type PIN PD, which simplifies the packaging process. The experimentM results show that the single channel I dB bandwidth of AWG ranges from 2.12nm to 3.06nm, the ROSA responsivity ranges from 0.097 A/W to 0.158A/W, and the 3dB bandwidth is up to 11 GHz. It is promising to be applied in the eight-lane WDM transmission system in data center interconnection. 展开更多
关键词 AWG GHz Receiver Optical Subassembly Based on Silica hybrid Integration technology for Data Center Interconnection The 8 PD
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Hybrid rice technology for food security in the world 被引量:10
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作者 YUAN Long-ping(China National Hybrid Rice R & D Center,Changsha,Hunan,410125,China) 《作物研究》 2004年第4期185-186,共2页
关键词 hybrid rice technology for food security in the world LINE
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A Single Mode Hybrid Ⅲ-Ⅴ/Silicon On-Chip Laser Based on Flip-Chip Bonding Technology for Optical Interconnection
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作者 王海玲 郑婉华 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第12期77-80,共4页
A single mode hybrid Ⅲ-Ⅴ/silicon on-chip laser based on the flip-chip bonding technology for on-chip optical interconnection is demonstrated. A single mode Fabry-Perot laser structure with micro-structures on an InP... A single mode hybrid Ⅲ-Ⅴ/silicon on-chip laser based on the flip-chip bonding technology for on-chip optical interconnection is demonstrated. A single mode Fabry-Perot laser structure with micro-structures on an InP ridge waveguide is designed and fabricated on an InP/AIGaInAs multiple quantum well epitaxial layer structure wafer by using i-line lithography. Then, a silicon waveguide platform including a laser mounting stage is designed and fabricated on a silicon-on-insulator substrate. The single mode laser is flip-chip bonded on the laser mounting stage. The lasing light is butt-coupling to the silicon waveguide. The laser power output from a silicon waveguide is 1.3roW, and the threshold is 37mA at room temperature and continuous wave operation. 展开更多
关键词 InP is with Chip Silicon On-Chip Laser Based on Flip-Chip Bonding technology for Optical Interconnection A Single Mode hybrid mode for
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Hybrid Laser Technology for Creation of Doped Biomedical Layers
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作者 Miroslav Jelinek Lucie Bacakova +6 位作者 Jan Remsa Tomas Kocourek Jan Miksovsky Petr Pisarik Marta Vandrovcova Elena Filova Sarka Kubinova 《Journal of Materials Science and Chemical Engineering》 2016年第1期98-104,共7页
Hybrid laser technologies for deposition of thin films and basic schemes of combination of pulsed laser deposition (PLD) with magnetron sputtering and RF discharges or two lasers or three laser deposition systems are ... Hybrid laser technologies for deposition of thin films and basic schemes of combination of pulsed laser deposition (PLD) with magnetron sputtering and RF discharges or two lasers or three laser deposition systems are presented. Experiences with deposition of chromium doped diamond-like carbon (DLC) films for coating of prostheses are described. Layers of different chromium concentrations were prepared using hybrid systems (PLD + magnetron sputtering or by double PLD). Results of physical and mechanical characterization of film properties and biomedical tests of trivalent and toxic hexavalent chromium are given. Experiences with double laser deposition of DLC layers doped with silver are also mentioned. 展开更多
关键词 hybrid Laser technology BIOMATERIALS Thin Films Doped Layers DLC
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Hybrid location determination technology within urban and indoor environment based on Cell-ID and path loss
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作者 HUSheng LEIJian-jun +2 位作者 XIAYing GEJun-wei BAEHae-young 《重庆邮电学院学报(自然科学版)》 2004年第5期46-49,共4页
The location determination technology based on simple delay evaluations or GPS is not accurate enough or even impossible in urban and indoor environments due to the multi path propagation.To enhance the location accur... The location determination technology based on simple delay evaluations or GPS is not accurate enough or even impossible in urban and indoor environments due to the multi path propagation.To enhance the location accuracy and reduce the operation cost within these environments, this paper proposes a novel hybrid location determination technology which combines CELL ID with the database correlation method. The proposed method generate the prediction database of path loss according to CELL ID, and after the computation the smallest squared error of measured path loss and the prediction path loss, the location of the mobile terminal is decided by the coordinates of the best matching matrix entry. 展开更多
关键词 混合定位决定技术 GPS CELL-ID 基础环境
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Embryo quality and chromosomal abnormality in embryos from couples undergoing assisted reproductive technology using preimplantation genetic screening
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作者 Mina Niusha Seyed Ali Rahmani +3 位作者 Leila Kohan Ladan Sadeghi Mohammad Nouri Hamid Reza Nejabati 《Asian pacific Journal of Reproduction》 2023年第1期16-22,共7页
Objective:To detect common chromosomal aneuploidy variations in embryos from couples undergoing assisted reproductive technology and preimplantation genetic screening and their possible associations with embryo qualit... Objective:To detect common chromosomal aneuploidy variations in embryos from couples undergoing assisted reproductive technology and preimplantation genetic screening and their possible associations with embryo quality.Methods:In this study,359 embryos from 62 couples were screened for chromosomes 13,21,18,X,and Y by fluorescence insitu hybridization.For biopsy of blastomere,a laser was used to remove a significantly smaller portion of the zona pellucida.One blastomere was gently biopsied by an aspiration pipette through the hole.After biopsy,the embryo was immediately returned to the embryo scope until transfer.Embryo integrity and blastocyst formation were assessed on day 5.Results:Totally,282 embryos from 62 couples were evaluated.The chromosomes were normal in 199(70.57%)embryos and abnormal in 83(29.43%)embryos.There was no significant association between the quality of embryos and numerical chromosomal abnormality(P=0.67).Conclusions:Embryo quality is not significantly correlated with its genetic status.Hence,the quality of embryos determined by morphological parameters is not an appropriate method for choosing embryos without these abnormalities. 展开更多
关键词 Assisted reproductive technology Preimplantation genetic screening ANEUPLOIDY Fluorescence insitu hybridization Chromosomal abnormalities Embryo quality BLASTOMERE BLASTOCYST
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Omics Technologies Reveal Abundant Natural Variation in Metabolites and Transcripts among Conventional Maize Hybrids 被引量:1
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作者 Xiaofeng S. Yang Jeffrey M. Staub +4 位作者 Anand Pandravada Susan G. Riordan Yongpan Yan Gary A. Bannon Susan J. Martino-Catt 《Food and Nutrition Sciences》 2013年第3期335-341,共7页
In this report we have evaluated metabolite and RNA profiling technologies to begin to understand the natural variation in these biomolecules found in commercial-quality, conventional (non-GM) maize hybrids. Our analy... In this report we have evaluated metabolite and RNA profiling technologies to begin to understand the natural variation in these biomolecules found in commercial-quality, conventional (non-GM) maize hybrids. Our analyses focus on mature grain, the article of commerce that is most typically subjected to the rigorous studies involved in the comparative safety assessment of GM products. We have used a population of conventionally-bred maize hybrids that derive from closely related inbred parents grown under standard field conditions across geographically similar locations. This study highlights the large amount of natural variation in metabolites and transcripts across conventional maize germplasm grown under normal field conditions, and underscores the critical need for further extensive studies before these technologies can be seriously considered for utility in the comparative safety assessment of GM crops. 展开更多
关键词 METABOLITE PROFILING RNA PROFILING Maize CONVENTIONAL hybrids GM Crops Natural Variation Omics-technologies Safety Assessment
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Relationship between Leaf Area Index and Yield of Hybrid Rice 被引量:2
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作者 熊洪 徐富贤 +5 位作者 朱永川 张林 郭晓艺 刘茂 周兴兵 蒋先义 《Agricultural Science & Technology》 CAS 2013年第11期1554-1558,共5页
In the research, 20 indica hybrid rice varieties were investigated under high-dense and low-amount, mid-dense and mid-amount and low-dense and high-amount fertilization conditions in order to explore correlation betwe... In the research, 20 indica hybrid rice varieties were investigated under high-dense and low-amount, mid-dense and mid-amount and low-dense and high-amount fertilization conditions in order to explore correlation between LAI in ful heading stage with yield and to analyze yield differences, yield components, material accumulation and transferring, as wel as correlation between key cultivation factors and yield. Final y, approaches and key technology for yield breakthrough were dis-cussed, which provides theoretical and technological references for rice high yield. 展开更多
关键词 hybrid rice variety LAI YIELD Key technology
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Hybrid骨外固定结合Ilizarov骨段延长术治疗股骨开放性骨折
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作者 王宝奎 郑永发 +2 位作者 孙振辉 王沛 《实用骨科杂志》 2005年第5期406-409,共4页
目的探讨Hybrid骨外固定结合Hizarov自体骨延长治疗股骨开放骨折伴大段骨缺损的疗效.方法自1999~2003年本院共收治股骨开放骨折伴大段骨缺损患者12 例,根据Gustilo Andersen开放骨折分型,其中ⅢA型5 例,ⅢB型7 例;MESS评分在7分或者7... 目的探讨Hybrid骨外固定结合Hizarov自体骨延长治疗股骨开放骨折伴大段骨缺损的疗效.方法自1999~2003年本院共收治股骨开放骨折伴大段骨缺损患者12 例,根据Gustilo Andersen开放骨折分型,其中ⅢA型5 例,ⅢB型7 例;MESS评分在7分或者7分以下伴骨缺损的患者被选择,骨缺损均在4 cm以上.12 例患者均采用Hybrid骨外固定结合Ilizarov自体骨延长治疗.结果术后随访8个月~4 a(平均20个月),12 例患者均获随访,所有患者均获稳定骨折愈合,平均骨折愈合时间26周(18~30周),平均外固定时间34周(32~44周).其中针道感染8 例,皮肤过敏1 例,骨折畸形愈合2 例;无深部感染、骨折不愈合病例,术后膝关节僵直3 例.根据Paley骨折愈合评分,优8 例,良1 例,可2 例,差1 例,优良率为75%;根据膝关节HSS评分,优7 例,良3 例,可1 例,差1 例,优良率为83.33%.结论 Hybrid骨外固定结合自体Ilizarov骨延长是治疗大段骨折的一种有效方法. 展开更多
关键词 骨缺损 股骨开放骨折 hybrid骨外固定 ILIZAROV技术 骨段延长
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技术异质性视角下的我国绿色创新效率及关键因素作用机制研究:基于Hybrid DEA和结构化方程模型 被引量:59
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作者 沈能 周晶晶 《管理工程学报》 CSSCI CSCD 北大核心 2018年第4期46-53,共8页
在考虑技术异质性的基础上,本文利用考虑非期望产出的Meta-frontier效率函数测算了我国各地区的绿色创新效率,并在此基础上运用结构化方程建立绿色创新结构模型,进行绿色创新影响机制研究。研究发现:(1)由于不同地区生产技术存在较大差... 在考虑技术异质性的基础上,本文利用考虑非期望产出的Meta-frontier效率函数测算了我国各地区的绿色创新效率,并在此基础上运用结构化方程建立绿色创新结构模型,进行绿色创新影响机制研究。研究发现:(1)由于不同地区生产技术存在较大差异,导致绿色创新效率呈现"东部—西部—中部"依次递减的格局;(2)不论是东部还是中西部地区,良好的产业结构、自由的技术交易市场等基础环境对绿色创新的促进作用大于其它要素;(3)我国环境规制政策迫切需要由强制型向激励型的转变,从而提高企业实施清洁生产的积极性,提高我国绿色创新效率。在制定环境保护政策时要考虑不同地区之间存在的技术差距以及现有产业结构,采取差异化的效率提升策略,并进行实时监控。 展开更多
关键词 绿色创新效率 技术差距 环境规制 hybridDEA 结构方程模型
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Hybrid material integration in silicon photonic integrated circuits 被引量:3
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作者 Swapnajit Chakravarty† Min Teng +1 位作者 Reza Safian Leimeng Zhuang 《Journal of Semiconductors》 EI CAS CSCD 2021年第4期33-42,共10页
Hybrid integration ofⅢ-Ⅴand ferroelectric materials is being broadly adopted to enhance functionalities in silicon photonic integrated circuits(PICs).Bonding and transfer printing have been the popular approaches fo... Hybrid integration ofⅢ-Ⅴand ferroelectric materials is being broadly adopted to enhance functionalities in silicon photonic integrated circuits(PICs).Bonding and transfer printing have been the popular approaches for integration of III–V gain media with silicon PICs.Similar approaches are also being considered for ferroelectrics to enable larger RF modulation bandwidths,higher linearity,lower optical loss integrated optical modulators on chip.In this paper,we review existing integration strategies ofⅢ-Ⅴmaterials and present a route towards hybrid integration of bothⅢ-Ⅴand ferroelectrics on the same chip.We show that adiabatic transformation of the optical mode between hybrid ferroelectric and silicon sections enables efficient transfer of optical modal energies for maximum overlap of the optical mode with the ferroelectric media,similar to approaches adopted to maximize optical overlap with the gain section,thereby reducing lasing thresholds for hybridⅢ-Ⅴintegration with silicon PICs.Preliminary designs are presented to enable a foundry compatible hybrid integration route of diverse functionalities on silicon PICs. 展开更多
关键词 CMOS technology photonic integrated circuits hybrid integration ferroelectric modulator
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An Innovative Strategy for Reciprocal Distant Hybridization between Spartina alterniflora and Rice 被引量:3
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作者 陈启康 陈博 +2 位作者 陆惠兰 周慧 梅治平 《Agricultural Science & Technology》 CAS 2015年第12期2604-2611,共8页
[Objective] This study aimed to explore germplasm resources of salt toler- ant Spartina alterniflora and high yield rice, and develop an innovative strategy for distant hybridization between S. altemiflora and rice. [... [Objective] This study aimed to explore germplasm resources of salt toler- ant Spartina alterniflora and high yield rice, and develop an innovative strategy for distant hybridization between S. altemiflora and rice. [Method] Crossing (rice ♀ ): hot water emasculation and glume-cutting pollination method, heat emasculation and pollen-suction pollination method; reciprocal crossing (S. alterniflora ♀ glume-cutting emasculation and pollination method, continuous emasculation-pollination method, hot water emasculation and continuous emasculation-pollination method. [Result] In crossing groups (rice ♀ × S. alterniflora ♂ ), compared with hot water emasculation and glume-cutting pollination treatment, the number of seed-bearing combinations, seed number per spike and seedling emergence rate in heat emasculation and pollen-suction pollination treatment were improved by 34.09%, 121.21% and 60.07%, respectively; hybridization efficiency was improved by 6-7 times. In reciprocal cross- ing groups (S. altemiflora ♀× rice ♂ ), compared with glume-cutting emasculation and pollination treatment, the number of seed-bearing combinations and seed num- ber per spike in continuous emasculation-pollination treatment were improved by 3.14 and 4.21 times, respectively; seedling emergence rate was improved by 68.47%; hybridization efficiency was improved by 7-8 times. [Conclusion] Heat emas- culation and pollen-suction pollination method is suitable for hybridization between rice ♀× S. alterniflora ♂; continuous emasculation-pollination method is suitable for hybridization between S. alterniflora ♀× rice ♂. 展开更多
关键词 Spartina altemiflora/rice Distant hybridization method New technology Germplasm innovation
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Literature Analysis on Fluorescence in situ Hybridization in China during 2002-2016 被引量:1
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作者 Mecao ZHUO Guanghuan YANG +2 位作者 Menghan LI Yan HE Ba DAN 《Asian Agricultural Research》 2017年第12期64-67,共4页
In order to explore researches about the chromosome karyotype analysis and fluorescence in situ hybridization(FISH) technology in China,using the bibliometric method,taking " fluorescence in situ hybridization(FI... In order to explore researches about the chromosome karyotype analysis and fluorescence in situ hybridization(FISH) technology in China,using the bibliometric method,taking " fluorescence in situ hybridization(FISH) " and " chromosome" as key words,this paper made a statistical analysis on the literature published in China National Knowledge Infrastructure(CNKI) during 2002-2016.The results indicated that the number of papers published in 2002 was the smallest(37),while the number of papers published in 2012 was the largest(125).In terms of the distribution of organizations of authors,in 1201 papers,11 organizations published papers ≥15,accounting for 21.65%.In terms of distribution of papers published by different periodicals,11 periodicals published papers ≥10,accounting for 17.65%.In terms of the papers supported by foundation projects,in all papers searched,377 papers were supported by foundation projects,accounting for 31.39%.In terms of the distribution of doctoral and master's dissertations,259 papers were master's dissertations,accounting for 21.57%;92 papers were doctoral dissertations,accounting for 7.66%. 展开更多
关键词 Fluorescence in situ hybridization(FISH) technology CHROMOSOME BIBLIOMETRIC Literature analysis
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Tracking and Monitoring Leaf Development, Coupling Law and Regulation Techniques during Flowering Period of Hybrid Foxtail Millet (<i>Setaria italica</i>(L.) P. Beauv.) Parental Lines 被引量:1
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作者 Qiang Li Dan Liu +5 位作者 Guoxing Ma Yanhua Shi Yanjiao Cui Xiaodong Zhang Suying Li Zhengli Liu 《Agricultural Sciences》 2021年第2期84-111,共28页
The determining factor of<em> Setaria italica </em>(L.) P. Beauv. is the coupling of its flowering stage and outcrossing rate which leads to low and unstable seed yields in self-pollinated foxtail millet h... The determining factor of<em> Setaria italica </em>(L.) P. Beauv. is the coupling of its flowering stage and outcrossing rate which leads to low and unstable seed yields in self-pollinated foxtail millet hybrids and thereby limits their large-scale application. In this study, Datong 27, Datong 29 and gu 83 were screened and identified through meticulous observations of their pollination habitats. High exposure rate, degree of exposure and plump of stigma are good factors to accept foreign pollen. Datong 27 and Datong 29 have some additional characteristics, such as long filaments and exposed and full anthers that contain a large amount of pollen. We transformed into a series of stigma-exposed and plump sterile lines that easily accepted exotic pollen. New restorer lines with anthers that were full of powder and exhibited quick recovery, which improved the parental lines’ heterosexual characteristics. By tracking and monitoring the leaf development of the new sterile and restorer lines, a coupling law of leaf development was determined and a series of flowering control measures were formulated. These factors ensured that the parental lines encounter one another during the flowering stage. By utilizing fertilizer and water, the vitality of the female stigma, amount of powder scattered and powder loosening time were prolonged, which increased hybrid seed yields from 1500 to 3000 kg/hm<sup>2</sup>. These findings were helpful in resolving the technical problems of seed production that restricted the propagation of foxtail millet hybrids and supporting future large-scale applications. 展开更多
关键词 Foxtail Millet hybridS Leaf Age Coupling Law Flowering Regulation Seed Production technology
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“Hybrid技术”在成人瓣膜病合并粗大动脉导管未闭中的应用
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作者 赵鹏英 刘瑞生 +1 位作者 程殿威 宋兵 《心肺血管病杂志》 2020年第12期1453-1456,共4页
目的:探讨“Hybrid技术”在治疗成人瓣膜病合并粗大动脉导管未闭(PDA)中的有效性和安全性,并分析该术式的近、中期临床疗效。方法:回顾性分析2015年5月至2019年4月,在兰州大学第一医院心外科住院的8例成人瓣膜病合并粗大PDA患者的临床资... 目的:探讨“Hybrid技术”在治疗成人瓣膜病合并粗大动脉导管未闭(PDA)中的有效性和安全性,并分析该术式的近、中期临床疗效。方法:回顾性分析2015年5月至2019年4月,在兰州大学第一医院心外科住院的8例成人瓣膜病合并粗大PDA患者的临床资料,其中女性5例,男性3例,年龄25~56岁,平均(32.8±4.5)岁。8例患者手术分两期进行,一期在全麻下经胸小切口行动脉导管未闭封堵术,术后3~6个月二期在全麻低温正中开胸体外循环下行心脏瓣膜置换术。术前、术后1、3、6个月分别行超声心动图及X线片检查,测量心胸比、LVEDD、LVEF、肺动脉收缩压。结果:所有患者均顺利完成手术,8例患者术前心胸比为(0.75±0.04),一期动脉导管封堵术后心胸比缩小为(0.69±0.16),二期瓣膜置换术后心胸比缩小为(0.61±0.48)。术前LVEDD为(66.83±8.82)mm,一期封堵术后缩小为(59.64±8.61)mm,二期瓣膜术后缩小为(54.69±6.73)mm。术前LVEF为(53.59±4.13)%,一期封堵术后为(55.86±3.97)%,二期瓣膜术后为(54.73±4.06)%。术前肺动脉收缩压为(68.94±11.25)mmHg,一期封堵术后降为(59.43±9.68)mmHg,二期瓣膜术后降为(50.74±8.36)mmHg。术后患者临床症状较术前明显改善,随访结束,8例患者无死亡,无急性心力衰竭及低心排,无封堵器脱落移位,无导管再通,无溶血、无瓣周漏及其他特殊并发症。结论:“Hybrid技术”可成功治疗成人瓣膜病合并粗大PDA,有效降低手术风险,临床近中期疗效满意,可成为治疗此类患者的一种安全、有效的方法。 展开更多
关键词 瓣膜病 粗大动脉导管未闭 杂交技术
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Hybrid Rice Breeding in China
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作者 LI Yanjun 《Chinese Annals of History of Science and Technology》 2020年第2期135-159,共25页
Hybrid rice technology in China was developed in three stages. From the 1950s onwards, hybrid rice researchers, as typified by Yuan Longping, sought out a feasible approach to utilizing rice heterosis, and developed t... Hybrid rice technology in China was developed in three stages. From the 1950s onwards, hybrid rice researchers, as typified by Yuan Longping, sought out a feasible approach to utilizing rice heterosis, and developed the three-line indica hybrid rice. Led by the government, the hybrid rice technology R&D teams adopted the research mode of "large-scale cooperation"(大协作), and accomplished technical innovations in the three-line system, selective breeding, and production of hybrid seeds. In the ensuing decade, Yuan Longping and others discovered the photo-thermo sensitive genic male sterility(PTGMS) of rice and developed PTGMS lines, turning highly advantageous two-line rice breeding from scientific vision into reality. Over the next twenty-five years, China’s super-rice breeding program integrated the conventional, three-line, and two-line breeding methods with modern molecular biotechnology methods. For nearly half a century, China made outstanding attainments in acquiring quality strains that yielded enormous economic and social benefits. Throughout this process, factors such as urgent social demand for increased grain production and scientific research cooperation provided significant impetus. 展开更多
关键词 hybrid rice breeding technology China Yuan Longping
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Improved Nucleic Acid Spot Hybridization Technique for Detection of Potato Spindle Tuber Viroid(PSTVd)
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作者 Qiu Cai-ling Lu Dian-qiu +9 位作者 Liu De-fu Shi Jiao-xu Bao Liu-yuan Ma Zhong-lian Liu Li Feng Zhen-yue Huang Xian-min Jiang Rui Chen Yue Wang Shi-min 《Journal of Northeast Agricultural University(English Edition)》 CAS 2022年第1期26-32,共7页
Potato spindle tuber viroid(PSTVd)disease is one of the major diseases that threatens potato production.Therefore,an advanced,rapid and sensitive detection technology is needed to detect the disease for better control... Potato spindle tuber viroid(PSTVd)disease is one of the major diseases that threatens potato production.Therefore,an advanced,rapid and sensitive detection technology is needed to detect the disease for better control.In order to establish an easier nucleic acid spot hybridization(NASH)method,some studies were tried as the followings:(1)the pre-hybridization step of nucleic acid spot hybridization(NASH)was omitted compared with ordinary way;(2)RNA extraction(phenol extraction and Ames buffer extraction)methods were compared;(3)fixed RNA by UV lamp and oven compared with UV cross-linker;(4)hybridized the RNA in shaking incubator and so on.The results showed that RNA extracted by Ames buffer was more effective than by the phenol extraction method.Besides,the result of hybridization without pre-hybridization step was better than that with 1.5 h of pre-hybridization.The more important discovery was that the shaking incubator could replace the hybridization oven and the ordinary UV lamp could replace the UV cross-linker.After a long term repeated research and testing,a new hybridization system that could rapidly detect the PSTVd by improved NASH technique merely using common instruments and equipment was established. 展开更多
关键词 potato spindle tuber viroid(PSTVd) nucleic acid spot hybridization(NASH) pre-hybridization RNA extraction detection technology
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Feasibility Limits for a Hybrid System with Ocean Wave and Ocean Current Power Plants in Southern Coast of Brazil
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作者 Andrea Fischer Jones S. Silva Alexandre Beluco 《Computational Water, Energy, and Environmental Engineering》 2021年第1期1-17,共17页
Some types of renewable energy have been experiencing rapid evolution in recent decades, notably among the energies associated with the oceans, such as wave and current energies. The development of new energy conversi... Some types of renewable energy have been experiencing rapid evolution in recent decades, notably among the energies associated with the oceans, such as wave and current energies. The development of new energy conversion technologies for these two forms of energy has been offering a large number of equipment configurations and plant geometries for energy conversion. This process can be implemented aiming at the result of feasibility studies in places with energy potentials, establishing minimum feasibility limits to be reached. This work aims to contribute in this sense with a feasibility study of a system with ocean wave power plants and with socio-current power plants to be operated on the southern coast of Brazil. This study evaluates a hybrid system with contributions from energy supplies obtained from wave plants and current plants, connected to the grid and supplying the demand of the municipalities in the North Coast region of the State of Rio Grande do Sul, the southernmost state of Brazil. The study was carried out with simulations with the Homer Legacy software, with some adaptations for the simulation of ocean wave plants and ocean current plants. The results indicate that the ocean wave power plants were viable in the vast majority of simulated scenarios, while the ocean current power plants were viable in the scenarios with more intense average ocean current speeds and with more expensive energy acquired from the interconnected system. 展开更多
关键词 hybrid Energy Systems Ocean Wave Power Plants Ocean Current Power Plants Feasibility Limits New technologies Software Homer
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