检索结果-南通市图书馆

Chemical Research in Chinese Universities 2008年第3期24卷 362-366页

作者： CHEN Da-wei SHI Jin-e yan Ji-chang WANG yue-hong yan Fu-cheng SHANG Shu-xia XUE Jing College of Urban and Environmental Sciences Northeast Normal University Changchun 130024 P. R. China

Titania nanocrystals with different morphologies were prepared using the hydrothermal method via controlling the pH values of solution, the ratio of reactants, temperature, and time of the hydrothermal reaction. The experimental results showed that uniform rod-like titania particles with an average aspect ratio of 6：1 could be obtained under the conditions of pH=11, n（TBOT）：n（TEA）=1：2, hydrothermal treatment at 150 °C for 24 h. When pH〈10, spherical titania nanocrystals could be obtained; with increasing the pH value, the diameter became smaller. Finally, the smallest size of the particles could reach 7 nm. Nanocrystals with uniformly well-dispersed and perfect crystallographic form were obtained via the above method. Phenol was used as the degradation model for testing the photocatalytical activity of the titania nanocrystals with different morphologies.

关键词： TiO2 Hydrothermal synthesis Nanoparticle Anatase Phenol degradation

Lycophyte transcriptomes reveal two whole-genome duplications in Lycopodiaceae:Insights into the polyploidization of Phlegmariurus

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Plant Diversity 2022年第3期44卷 262-270页

作者： Zeng-Qiang Xia Zuo-Ying Wei Hui Shen Jiang-Ping Shu Ting Wang Yu-Feng Gu Amit Jaisi yue-hong yan Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization The National Orchid Conservation Center of China and The Orchid Conservation and Research Center of ShenzhenShenzhen518114China CAS Center for Excellence in Molecular Plant Sciences Shanghai Institute of Plant Physiology and EcologyChinese Academy of Sciences300 Fenglin RoadShanghai200032China Shanghai Chenshan Plant Science Research Center Chinese Academy of Sciences3888 Chenhua Road SongjiangShanghai201602China University of Chinese Academy of Sciences Beijing100049China College of Life and Sciences Shanghai Normal UniversityShanghai201602China Life Science and Technology College Harbin Normal UniversityHarbinHeilongjiang 150025China Drug and Cosmetics Excellence Center School of PharmacyWalailak UniversityNakhon Si Thammarat80160Thailand

Lycophytes are an ancient clade of the non-flowering vascular plants with chromosome numbers that vary from tens to *** are an excellent study system for examining whole-genome duplications(WGDs),or polyploidization,in spore-dispersed vascular ***,a lack of genome sequence data limits the reliable detection of very ancient WGDs,small-scale duplications(SSDs),and recent ***,we integrated phylogenomic analysis and the distribution of synonymous substitutions per synonymous sites(Ks)of the transcriptomes of 13 species of lycophytes to identify,locate,and date multiple WGDs in the lycophyte family ***,we examined the genus Phlegmariurus for signs of genetic discordance,which can provide valuable insight into the underlying causes of such conflict(e.g.,hybridization,incomplete lineage sorting,or horizontal gene transfer).We found strong evidence that two WGD events occurred along the phylogenetic backbone of Lycopodiaceae,with one occurring in the common ancestor of extant Phlegmariurus(Lycopodiaceae)approximately 22-23 million years ago(Mya)and the other occurring in the common ancestor of Lycopodiaceae around 206-214 ***,we found significant genetic discordance in the genus Phlegmariurus,indicating that the genus has a complex evolutionary *** study provides molecular evidence for multiple WGDs in Lycopodiaceae and offers phylogenetic clues to the evolutionary history of Lycopodiaceae.

关键词： Lycophytes Whole genome duplication Polyploidization Phylogenomics Gene tree conflict

Insights into cryptic speciation of quillworts in China

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Plant Diversity 2023年第3期45卷 284-301页

作者： Yu-Feng Gu Jiang-Ping Shu Yi-Jun Lu Hui Shen Wen Shao yan Zhou Qi-Meng Sun Jian-Bing Chen Bao-Dong Liu yue-hong yan Life Science and Technology College Harbin Normal UniversityKey Laboratory of Plant Biology in Colleges of Heilongjiang ProvinceHarbin150025China Shenzhen Key Laboratory for Orchid Conservation and Utilization and Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and UtilizationThe National Orchid Conservation Center of China and the Orchid Conservation&Research Center of ShenzhenShenzhen518114China Zhejiang University City College Hangzhou310015China Shanghai Key Laboratory of Plant Functional Genomics and Resources Shanghai Chenshan Botanical GardenShanghai201602China Jiande Xin'anjiang Forest Farm Jiande311600China Institute of Botany Jiangsu Province and Chinese Academy of Sciences(Nanjing Botanical Garden Mem.Sun Yat-Sen)Nanjing210014China

Cryptic species are commonly misidentified because of high morphological similarities to other *** group of plants that may harbor large numbers of cryptic species is the quillworts(Isoetes spp.),an ancient aquatic plant *** over 350 species of Isoetes have been reported globally,only ten species have been recorded in *** aim of this study is to better understand Isoetes species diversity in *** this purpose,we systematically explored the phylogeny and evolution of Isoetes using complete chloroplast genome(plastome)data,spore morphology,chromosome number,genetic structure,and haplotypes of almost all Chinese Isoetes *** identified three ploidy levels of Isoetes in Chinaddiploid(2n=22),tetraploid(2n=44),and hexaploid(2n=66).We also found four megaspore and microspore ornamentation types in diploids,six in tetraploids,and three in *** analyses confirmed that *** as the ancestral group of the genus and revealed that Isoetes diploids,tetraploids,and hexaploids do not form monophyletic *** individual species possess a single genetic structure;however,several samples have conflicting positions on the phylogenetic tree based on SNPs and the tree based on plastome *** 36 samples shared 22 *** time analysis showed that *** diverged in the early Eocene(~48.05 Ma),and most other Isoetes species diverged 3-20 ***,different species of Isoetes were found to inhabit different water systems and environments along the yangtze *** findings provide new insights into the relationships among Isoetes species in China,where highly similar morphologic populations may harbor many cryptic species.

关键词： Plastid genome Isoetaceae Phylogeny Evolutionary Divergence time

Ceratopteris chunii and Ceratopteris chingii(Pteridaceae),two new diploid species from China,based on morphological,cytological,and molecular data

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Plant Diversity 2022年第3期44卷 300-307页

作者： Jun-Hao Yu Rui Zhang Qiao-Ling Liu Fa-Guo Wang Xun-Lin Yu Xi-Ling Dai Yong-Bo Liu yue-hong yan Eastern China Conservation Centre for Wild Endangered Plant Resources Shanghai Chenshan Botanical GardenShanghai 201602China College of Life Science Shanghai Normal UniversityShanghai200234China Shenzhen Key Laboratory for Orchid Conservation and Utilization National Orchid Conservation Center of China and the Orchid Conservation&Research Center of ShenzhenShenzhen518114China Guangdong Provincial Key Laboratory of Applied Botany South China Botanical GardenChinese Academy of SciencesGuangzhou510650China College of Forestry Central South University of Forestry&TechnologyChangshaHunan410004China State Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment Chinese Research Academy of Environmental SciencesBeijing100012China

Understanding how natural hybridization and polyploidizations originate in plants requires identifying potential diploid ***,cryptic plant species are widespread,particularly in Ceratopteris(Pteridaceae).Identifying Ceratopteris cryptic species with different polyploidy levels is a challenge because Ceratopteris *** high degrees of phenotypic ***,two new cryptic species of Ceratopteris,Ceratopteris chunii and Ceratopteris chingii,are described and *** analyses reveal that each of the new species form a well-supported *** and *** are similar to Ceratopteris gaudichaudii *** and ***,respectively,but distinct from their relatives in the stipe,basal pinna of the sterile leaf or subelliptic shape of the fertile leaf,as well as the spore *** addition,chromosome studies indicate that *** and *** are both *** findings will help us further understand the origin of Ceratopteris polyploids in Asia.

关键词： Ceratopteris Phylogeny Chromosome Taxonomy Cryptic species

Effective Teaching and Learning: Scaffolding in Reading Class

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海外英语 2015年第22期 287-288页

作者：岳宏艳吉林省延边大学外国语学院

This paper explores a teaching method—scaffolding in reading class, and also studies its background theories and proposes effective plans to carry out the scaffolding method. By this cooperative teaching and learning, students can not only complete teaching activities with the help of the teacher and students themselves, but also cultivate their abilities to use English and think critically.

关键词： scaffolding reading plan

Genome size evolution of the extant lycophytes and ferns

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Plant Diversity 2022年第2期44卷 141-152页

作者： Fa-Guo Wang Ai-Hua Wang Cheng-Ke Bai Dong-Mei Jin Li-Yun Nie AJ Harris Le Che Juan-JuanWang Shi-Yu Li Lei Xu Hui Shen Yu-Feng Gu Hui Shang Lei Duan Xian-Chun Zhang hong-Feng Chen yue-hong yan Key Laboratory of Plant Resources Conservation and Sustainable Utilization Guangdong Provincial Key Laboratory of Applied BotanySouth China Botanical GardenChinese Academy of SciencesGuangzhou510650China College of Life Sciences Shaanxi Normal UniversityXi'an710062China Eastern China Conservation Centre for Wild Endangered Plant Resources Shanghai Chenshan Botanical GardenShanghai201602China Key Laboratory of Environment Change and Resources Use in Beibu Gulf Ministry of EducationNanning Normal UniversityNanning530001China Department of Biology Oberlin CollegeOberlinOH44074USA State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of SciencesBeijing100093China Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization the National Orchid Conservation Center of China and the Orchid Conservation&Research Center of Shenzhen518114ShenzhenChina Life Science and Technology College Harbin Normal UniversityHarbin150025China

Ferns and lycophytes have remarkably large ***,little is known about how their genome size evolved in fern *** explore the origins and evolution of chromosome numbers and genome size in ferns,we used flow cytometry to measure the genomes of 240 species(255 samples)of extant ferns and lycophytes comprising 27 families and 72 genera,of which 228 species(242 samples)represent new *** analyzed correlations among genome size,spore size,chromosomal features,phylogeny,and habitat type preference within a phylogenetic *** also applied ANOVA and multinomial logistic regression analysis to preference of habitat type and genome *** the phylogeny,we conducted ancestral character reconstruction for habitat types and tested whether genome size changes simultaneously with shifts in habitat *** found that 2 C values had weak phylogenetic signal,whereas the base number of chromosomes(x)had a strong phylogenetic ***,our analyses revealed a positive correlation between genome size and chromosome traits,indicating that the base number of chromosomes(x),chromosome size,and polyploidization may be primary contributors to genome expansion in ferns and *** sizes in different habitat types varied significantly and were significantly correlated with habitat types;specifically,multinomial logistic regression indicated that species with larger 2 C values were more likely to be *** habitat is inferred to be ancestral for both extant ferns and lycophytes,whereas transitions to other habitat types occurred as the major clades *** in habitat types appear be followed by periods of genomic *** on these results,we inferred that habitat type changes and multiple whole-genome duplications have contributed to the formation of large genomes of ferns and their allies during their evolutionary history.

关键词： Genome size Ferns Chromosome numbers Habitat type Whole-genome duplications Evolution

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喇嘛甸油田二类油层聚驱井网优化研究

大庆石油地质与开发 2005年第4期24卷 84-86页

作者：岳鸿雁大庆油田有限责任公司第六采油厂黑龙江大庆163114

喇嘛甸油田将直接面临上返的问题,但二类油层注聚开发合理的注采井距、井网如何优化等都是目前急需解决的问题。通过对喇嘛甸油田二类油层地质特点的精细研究,选取了能够代表喇嘛甸油田二类油层实际状况的喇南试验二区东南部作为解剖区... 详细信息

喇嘛甸油田将直接面临上返的问题,但二类油层注聚开发合理的注采井距、井网如何优化等都是目前急需解决的问题。通过对喇嘛甸油田二类油层地质特点的精细研究,选取了能够代表喇嘛甸油田二类油层实际状况的喇南试验二区东南部作为解剖区块,开展了数值模拟和井网优化研究,从不同井网与原井网的匹配关系、对砂体的控制程度、注入速度与井距的关系、数值模拟预测以及今后上、下返井网的综合利用等不同角度进行了对比论证,优选出既适应二、三类油层,又能最大限度地提高最终采收率的合理井网、井距,对二、三类油层的井网部署和优化具有指导意义和参考价值。

关键词：二类油层数值模拟聚驱上返井网优化

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明代图录式类书《三才图会》的信息设计启示

艺术百家 2019年第2期37卷 177-182页

作者：李钢岳鸿雁上海交通大学设计学院

由《皇览》肇始的中国古代类书体,历经数代发展,形成独特的编排体例与信息设计思想。其中明代百科式图录类书《三才图会》由明文献学家、藏书家王圻及其子王思义撰写,辑录了天文、地理、人物、时令、宫室、器用、身体、文史、人事、仪... 详细信息

由《皇览》肇始的中国古代类书体,历经数代发展,形成独特的编排体例与信息设计思想。其中明代百科式图录类书《三才图会》由明文献学家、藏书家王圻及其子王思义撰写,辑录了天文、地理、人物、时令、宫室、器用、身体、文史、人事、仪器、珍宝、衣服、鸟兽、草木14类内容,包罗万象,内容丰富,拥有6125张图,在图文结构、关系、图片类型以及信息呈现上都具有参考意义。本文试从图录类书的历史入手,分析明代《三才图会》设计理念、信息结构、图文关系、视觉语言和阅读体验,总结其特点为视觉形象化(形象化的信息设计特点)、时空层次化(以天地人关系为核心的信息设计理念)、信息秩序化(参合并观的信息设计思路),为现代百科类纸质和电子图书的信息设计提供参考。

关键词：类书书籍设计信息设计信息可视化视觉传播

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河道采砂对航道和通航环境安全的影响

水运工程 2010年第8期 106-110页

作者：徐芳岳红艳重庆交通大学河海学院重庆400074 长江科学院河流所湖北武汉430010

以武汉市神龙三厂一期场平工程吹填采砂为例,采用二维水沙数学模型对拟定的4个采区采砂后工程河段的流速、水位的变化及回淤情况进行了计算分析,重点对采砂后采砂河段的航道和通航环境安全影响进行了分析。结果表明,在拟布置的采砂区,... 详细信息

以武汉市神龙三厂一期场平工程吹填采砂为例,采用二维水沙数学模型对拟定的4个采区采砂后工程河段的流速、水位的变化及回淤情况进行了计算分析,重点对采砂后采砂河段的航道和通航环境安全影响进行了分析。结果表明,在拟布置的采砂区,按设计的方量进行采砂,对航道和通航环境安全不会产生明显不利的影响。

关键词：采砂数学模型航道通航

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长江武汉河段河道整治方案浅析

泥沙研究 2008年第3期33卷 33-37页

作者：卢金友岳红艳长江科学院湖北武汉430010

根据武汉河段近期河床演变特点及其发展趋势,通过几种方案比较分析,结合长江中下游分汊河段的综合整治原则和"维护健康长江、促进人水和谐"的治江新理念,综合考虑防洪、航运、生态环境及水资源综合利用等各方面的需求,认为武汉河段整治... 详细信息

根据武汉河段近期河床演变特点及其发展趋势,通过几种方案比较分析,结合长江中下游分汊河段的综合整治原则和"维护健康长江、促进人水和谐"的治江新理念,综合考虑防洪、航运、生态环境及水资源综合利用等各方面的需求,认为武汉河段整治宜遵循上段稳定铁板洲汊道、中段白沙洲汊道和下段天兴洲汊道均保持为双汊河道的基本思想,具体整治方案需结合近期河床演变规律,通过河工模型试验等手段进一步研究确定。

关键词：河床演变武汉河段整治方案环境