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降膜吸收器热质传递影响因素及强化方法研究进展

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应用化工 2024年第8期53卷 1868-1873页

作者：杨文豪位兴华赵日晶黄东西安交通大学能源与动力工程学院陕西西安710049

从降膜吸收器热质传递影响因素和强化方法两方面综述了近年来的研究进展。在影响因素方面,对管间距和管径、溶液入口流量、温度及浓度、换热表面覆盖率、冷却水温度及流量和水蒸气压力进行了阐述。在强化方法方面,总结了在吸收剂中使用... 详细信息

从降膜吸收器热质传递影响因素和强化方法两方面综述了近年来的研究进展。在影响因素方面,对管间距和管径、溶液入口流量、温度及浓度、换热表面覆盖率、冷却水温度及流量和水蒸气压力进行了阐述。在强化方法方面,总结了在吸收剂中使用添加剂及降膜吸收器换热表面优化的方法。通过分子动力学模拟来解释添加剂对热质传递的影响机理及综合多种方法强化热质传递成为下一阶段的研究方向。

关键词：降膜吸收器热质传递影响因素强化方法

Levels of Crotonaldehyde and 4-hydroxy-(E)-2-nonenal and Expression of Genes Encoding Carbonyl-Scavenging Enzyme at Critical Node During Rice Seed Aging

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Rice science 2018年第3期25卷 152-160页

作者： FU Shenzao YIN Guangkun XIN Xia WU Shuhua wei xinghua LU Xinxiong State Key Laboratory of Rice Biology China National Rice Research Institute National Crop Genebank Institute of Crop Science Chinese Academy of Agricultural Sciences

The critical node(CN) is an important stage during seed aging, which is related to effective genebank conservation. Previous studies have demonstrated that proteins undergo carbonylated modification at the CN in rice, indicating oxidative damage. However, the levels of reactive carbonyl species(RCS) and the associated scavenging system at the CN are largely unknown. In this study, we optimized methods for the extraction and analysis of RCS from dry rice embryos. In order to acquire seeds at the CN, rice seeds were subjected to natural conditions for 7, 9, 11 and 13 months, and the seed germination rates were reduced to 90%, 82%, 71% and 57%, respectively. We chose the stage with seed germination rate of 82% as the CN according to the rice seed vigor loss curve. The levels of crotonaldehyde and 4-hydroxy-(E)-2-nonenal(HNE) were significantly increased at the CN. In addition, genes encoding carbonyl-scavenging enzyme, including Os ALDHs and Os AKRs, were significantly down-regulated at the CN, and reductions in the expression of Os ALDH2-2, Os ALDH2-5, Os ALDH3-4, Os ALDH7, Os AKR1 and Os AKR2 in particular could be responsible for RCS accumulation. Thus, the accumulations of crotonaldehyde and HNE and down-regulation of genes encoding carbonyl-scavenging enzyme might be related to an accelerating loss of seed viability at the CN.

关键词： carbonyl-scavenging system reactive carbonyl species seed aging crotonaldehyde critical node rice storage

Temporal changes in SSR allelic diversity of major rice cultivars in China

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Journal of Genetics and Genomics 2009年第6期36卷 363-370页

作者： xinghua wei Xiaoping Yuan Hanyong Yu Yiping Wang Qun Xu Shengxiang Tang State Key Laboratory of Rice Biology China National Rice Research Institute Hangzhou 310006 China

Forty simple sequence repeats （SSRs） were used to assess the changes of diversity in 310 major Chinese rice cultivars grown during the 1950s-1990s. Of the 40 SSR loci, 39 were polymorphic. A total of 221 alleles were detected with an average of 5.7 alleles per locus （Na）. The Nei＇s genetic diversity index （He） varied drastically among the loci （0.207 to 0.874, mean 0.625）. Comparing the temporal changes in Na and He, the cultivars from the 1950s had more alleles and higher He scores than the cultivars from the other four decades. Analysis of molecular variance （AMOVA） indicated that the genetic differentiation among the five decades was not significant in the whole set, but significant within indica and japonica. More changes among the decades were revealed in indica cultivars than in japonica cultivars. Some alleles had been lost in current rice cultivars in the 1990s, occurring more frequently in indica. These results suggest that more elite alien genetic resources should be explored to widen the genetic backgrounds of rice cultivars currently grown in China.

关键词： rice (Oryza sativa L.) major varieties SSR genetic diversity AMOVA

两种温度处理条件下水稻苗期形态性状及耐热性相关QTL定位

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种子 2024年第7期43卷 1-8,16页

作者：王静王兴宇徐群章孟臣王珊孙燕飞魏兴华杨窑龙郭晓红冯跃黑龙江八一农垦大学农学院/中国水稻研究所水稻生物育种全国重点实验室黑龙江大庆163000

为了揭示不同温度条件下苗期形态性状和耐热性的分子遗传基础,本研究以籼稻中9B和粳稻M494杂交衍生的重组自交系(Recombinant inbred line, RIL)群体为试验材料,结合高密度SNP图谱,在两种温度条件下对水稻苗期株高、根长、地上干重、地... 详细信息

为了揭示不同温度条件下苗期形态性状和耐热性的分子遗传基础,本研究以籼稻中9B和粳稻M494杂交衍生的重组自交系(Recombinant inbred line, RIL)群体为试验材料,结合高密度SNP图谱,在两种温度条件下对水稻苗期株高、根长、地上干重、地下干重、地上鲜重、地下鲜重及高温处理下干枯叶长等级进行QTL分析。结果表明,在两种温度处理下,RIL群体苗期耐热性存在明显差异;共检测到28个苗期形态性状和耐热性相关QTL,分布于第1、2、3、4、7、8、10号染色体上,可解释的表型贡献率介于3.26%~34.10%之间。其中在第3号染色体Chunk343~351区间存在同时控制两种温度条件下株高、地上鲜重、地下鲜重、地上干重、地下干重和高温下干枯叶长等级的主效QTL簇;在第3号染色体Chunk338~343区间存在控制高温条件下根长的QTL;在第8号染色体Chunk796~803区间检测到同时调控高温条件下地上鲜重和地下鲜重的新QTL位点。

关键词：水稻苗期形态性状耐热性 QTL

Classification and Identification of indica P/TGMS Lines in China

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Rice science 2019年第3期26卷 195-198页

作者： ZHANG Mengchen WANG Shan YAN Jianfang SUN Shuiyong XU Xin XU Qun YUAN Xiaoping wei xinghua YANG Yaolong State Key Laboratory of Rice Biology China National Rice Research Institute Seeds Administration Center of Zhejiang Province

Despite extensive studies on cultivated rice, the population structure and genetic diversity of the indica photoperiod-and thermo-sensitive genic male sterility(P/TGMS) lines in China remains unclear. Using 48 simple sequence repeat(SSR) markers, we genotyped a panel of 208 indica P/TGMS lines and confirmed three subgroups, named indica-I, indica-II and indica-III, in indica P/TGMS lines. Further diversity analysis indicated indica-II had the highest genetic diversity. The genetic differentiation between indica-II and indica-III was demonstrated as the largest among the three subgroups. Moreover, indica/japonica component identification was detected that five P/TGMS lines possess indica components less than 0.900. These results improve our knowledge on the genetic background for P/TGMS lines in China and will be beneficial for hybrid rice breeding programs.

关键词： Classification Identification Despite

Genetic diversity of rice cultivars (Oryza sativa L.) in China and the temporal trends in recent fifty years

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Chinese Science Bulletin 2006年第6期51卷 681-688页

作者： QI Yonawen ZHANG Dongling ZHANG Hongliang WANG Meixing SUN Junli wei xinghua QIU Zongen TANG Shengxiang CAO Yongsheng WANG Xiangkun LI Zichao Key Laboratory of Crop Genomics and Genetic Improvement of Min- istry of Agriculture and Beijing Key Laboratory of Crop Genetic Improvement China Agricultural University Beijing 100094 China China National Rice Research Institute Hangzhou 310006 China Institute of Crop Science Chinese Academy of Agricultural ScienceBeijing 100081 China

To understand geographical distribution of the genetic diversity of rice cultivars {Oryza sativa L.) and its trends in recent fifty years in China, 453 ’ accessions were analyzed by 36 microsatellites loci and 42 phenotypic traits. Results revealed that the genetic diversity by SSRs is highly consistent with that by phenotypic traits and the genetic diversity of indica cultivars was higher than that of japonica cultivars; the genetic diversity of cultivars declined from 1950s to 1980s and then increased greatly; among the six rice ecological zones (REZs), genetic diversity of REZTl was the highest and those of REZV and REZVT were the lowest at both DNA and phenotypic level. Jiangsu and Jiangxi provinces in the middle and lower reaches of Yangtze River and Sichuan province in southwest of China were the areas with the highest genetic diversity. Breeders in REZV which is an important japonica rice area but with very low genetic diversity should explore more gene resources to widen the genetic backgrounds of cultivars.

关键词：中国水稻种植遗传多样性微卫星标记表型

Sample Log For International Mudlogging Projects

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Global Geology 2000年第2期5卷 217-219页

作者： wei xinghua Yang Haibo Andrew Romolliwa Daqing Petroleum Administrative Bureau Daqing 163453 P. R. China Daqing Educational Institute Daqing 163453 P. R. China

Accurate sample logging is very essential part of mud logging at wellsite. During the logging work of the foreign cooperation mudlogging projects, the description of drillling cuttings (sample) required by the foreign companies is quite different from what we did at home. This paper is intended to give some ideas of description of sample at wellsite with the reference of the guidance of standards of several foreign companies and the working experiences of the author, also some problems that the geologists should pay attention to during the description of sample at wellsite.

关键词： Key words Sample Description Log Cuttings

Genetic Variation Dissection of Rice Blast Resistance Using an Indica Population

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Rice science 2020年第4期27卷 255-258页

作者： ZHANG Mengchen wei Zhonghua YUAN Xiaoping WANG Caihong WANG Shan NIU Xiaojun XU Xin XU Qun FENG Yue YU Hanyong WANG Yiping ZHU Zhiwei ZHAI Rongrong YANG Yaolong wei xinghua State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310006China Suihua Branch of Heilongjiang Academy of Agricultural Sciences Suihua 152000China Institute of Crop and Nuclear Technology Utilization Zhejiang Academy of Agricultural SciencesHangzhou 310021China

Rice blast disease,caused by fungus pathogen Magnaporthe oryzae,is one of the most destructive diseases that impact rice *** the worldwide,rice harvests lose 10%to 30%of the total production because of blast infection... 详细信息

关键词： Population enough farming

Natural Gas Resource in Jurassic,Y Faulted Subbasin of Songliao Basin

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Global Geology 2000年第2期5卷 202-206页

作者： Yang Haibo Hu Yutao wei xinghua Daqing Petroleum Administrative Bureau Daqing 163453 P. R. China No. 5 production plant Daqing 163000 P. R. China

Y faulted depression is located in the southeast of Songliao basin, which is another important area explored for natural gas in deep Formation after Xujiaweizi. But it is lowly explored and is not likely to make a major breakthrough in nature gas exploration for shallow and medium layers. The data on the geochemistry and geology indicate that the deep source rocks, especially the Jurassic mudstone has great potentials of natural gas generation. Based on this, the paper examines the conditions of natural gas generation and further points out the favorable prospective gas - bearing area. The results show that the amount of natural gas generated from the Jurassic mudstone in the Y faulted depression is 8. 42x1012m3 and the favorable gas - generating area is the body of the faulted depression.

关键词： Y faulted depression Deep strata Oil and gas resource