检索结果-南通市图书馆

Whole genome re-sequencing reveals evolutionary patterns of sacred lotus (Nelumbo nucifera)

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

Journal of Integrative Plant Biology 2018年第1期60卷 2-15页

作者： Longyu Huang Mei Yang Ling Li hui Li dong Yang Tao shi Pingfang Yang Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture Wuhan Botanical Garden of Chinese Academy of SciencesWuhan 43oo74 China University of Chinese Academy of Sciences Beijing 100049 China Sino-African Joint Research Center Chinese Academy of Sciences Wuhan 430074 China Hubei Collaborative Innovation Center for Grain Industry Jingzhou 434025 China

Sacred lotus(Nelumbo nucifera or lotus) is an important aquatic plant in horticulture and ecosystems. As a foundation for exploring genomic variation and evolution among different germplasms, we re-sequenced 19 individuals from three cultivated temperate lotus subgroups(rhizome,seed and flower lotus), one wild temperate lotus subgroup(wild lotus), one tropical lotus group(Thai lotus) and an outgroup(Nelumbo lutea). Through genetic diversity and polymorphism analysis by non-missing SNP sites widely distributed in the whole genome, we confirmed that wild and Thai lotus exhibited greater differentiation with a higher genomic diversity compared to cultivated lotus. Rhizome lotus had the lowest genomic diversity and a closer relationship to wild lotus, whereas the genomes of seed and flower lotus were admixed. Genes in energy metabolism process and plant immunity evolved rapidly in lotus, reflecting local *** established that candidate genes in genomic regions with significant differentiation associated with temperate and tropical lotus divergence always exhibited highly divergent expression pattern. Together, this study comprehensive and credible interpretates important patterns of genetic diversity and relationships, gene evolution, and genomic signature from ecotypic differentiation of sacred lotus.

关键词： Nelumbo nucifera Whole genome re-sequencing reveals evolutionary patterns of sacred lotus Figure

Synthesis and Crystal Structure of a New One-dimensional Zn(II) Nitronyl Nitroxide Complex Bridged by Pyridine-2,4-dicarboxylate Anion

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2006年第6期25卷 735-739页

作者： GAO dong-Zhao LI Li-Cun LIAO Dai-Zheng JIANG Zong-hui YAN shi-Ping Department of Chemistry Nankai University Tianjin 300071 China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou 350002 China

A new one-dimensional （1-D） Zn（Ⅱ） nitronyl nitroxide complex bridged by pyridine-2,4-dicarboxylate anion, [Zn（NIT4Py）（2,4-PDA）（H2O）2], （NIT4Py = 2-（4′-pyridyl）-4,4,5,5- tetramethylimidazoline-1-oxyl-3-oxide and 2,4-PDA = pyridine-2,4-dicarboxylate anion）, has been synthesized and structurally characterized by X-ray diffraction. It crystallizes in monoclinic, space group P21/c with a = 16.834（2）, b = 7.4376（10）, c = 18.295（3） A, β = 102.848（2）°, V = 2233.2（5） A^3, C19H23N4O3Zn, Mr = 500.78, Dc = 1.489 g/cm^3,μ（MoKa） = 1.152 mm^-1, F（000） = 1036, Z = 4, the final R = 0.0390 and wR = 0.0915 for 3234 observed reflections. In the complex, each zinc（Ⅱ） ion is six-coordinated by one nitrogen atom of the radical ligand （NIT4Py）, one nitrogen atom and two oxygen atoms of two 2,4-PDA anions and two oxygen atoms of two water molecules. Each 2,4-PDA anion bridges two Zn（Ⅱ） ions via a tridentate mode into a 1-D chain, and these 1-D chains are further linked into a 2-D network via hydrogen-bonding interactions.

关键词： zinc(Ⅱ) complex nitronyl nitroxide radical crystal structure pyridine-2,4-dicarboxylic acid

Generation of Leydig-like cells:approaches,characterization,and challenges

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2022年第4期24卷 335-344页

作者： Zhao-hui Li Jun-dong Lu shi-Jun Li Hao-Lin Chen Zhi-Jian Su Guangdong Provincial Key Laboratory of Bioengineering Medicine Department of Cell BiologyJinan UniversityGuangzhou 510632China lnstitute of Life Sciences Wenzhou UniversityWenzhou 325035China Department of Gynecology and Obstetrics The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical UniversityWenzhou 325027China National Engineering Research Center of Genetic Medicine Jinan UniversityGuangzhou 510632China

Testosterone production by Leydig cells(LCs)plays a crucial role in male *** functional degeneration of LCs can cause testosterone deficiency,ultimately resulting in primary male *** of exogenous LCs with the ability to produce testosterone in response to the regulation of the hypothalamus-pituitary-gonad axis could be a promising alternative option to treat male primary *** studies have shown that it is possible to generate Leydig-like cells from stem cells by various *** addition,somatic cells,such as embryonic or adult fibroblasts,have also been successfully reprogrammed into Leydig-like *** this review,we summarized the recent advances in the generation of Leydig-like cells,with an emphasis on comparing the effectiveness and safety of different protocols used and the cells *** further analyzing the characteristics of Leydig-like cells generated from fibroblasts based on small signaling molecules and regulatory factors,we found that although the cells may produce testosterone,they are significantly different from real *** future in vivo applications,it is important that the steroidogenic cells generated be evaluated not only for their steroidogenic functions but also for their overall cell metabolic state by proteomics or transcriptomic tools.

关键词： fibroblasts hypogonadism Leydig-like cells reprogramming stem cells

Nonlinear analysis of photo-induced wrinkling of glassy twist nematic films on compliant substrates

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

Acta Mechanica Sinica 2015年第5期31卷 672-678页

作者： dong Yang Ling-hui He CAS Key Laboratory of Mechanical Behavior and Design of Materials University of Science and Technology of China

A kinetics approach is developed for the geometrically nonlinear analysis of photo-induced wrinkling of glassy twist nematic films on soft elastic *** this way,the problem is reduced to finding the steady state of an overdamped evolution system according to a kinetic law,rather than directly solving the coupled nonlinear *** enables one to account for the complicated director distribution and obtain the precise wrinkling morphology of the *** the approach proposed here is for a twist nematic film,it can be extended to study glassy nematic films with other director distributions.

关键词： Glassy nematic film Wrinkling pattern Nonlinear analysis

Numerical simulation study on multiphase flow pattern of hydrate slurry

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2023年第6期20卷 3897-3917页

作者： Xiao-Fang Lv Feng Chen Jie Zhang Yang Liu Qian-Li Ma hui Du Chuan-Shuo Wang shi-dong Zhou Bo-hui shi Shang-Fei Song Jing Gong Jiangsu Key Laboratory of Oil and Gas Storage&Transportation Technology Changzhou UniversityChangzhou213016JiangsuChina China Petroleum&Chemical Corporation Northwest Oilfield Branch Petroleum Engineering Technology Research InstituteUrumqi830011XinjiangChina Sinopec Shengli Oilﬁeld Company Dongying257001ShandongChina National Engineering Laboratory for Pipeline Safety/MOE Key Laboratory of Petroleum Engineering China University of Petroleum-Beijing102249BeijingChina

The research on the multiphase flow characteristics of hydrate slurry is the key to implementing the risk prevention and control technology of hydrate slurry in deep-water oil and gas mixed transportation *** paper established a geometric model based on the high-pressure hydrate slurry experimental *** model was used to carry out simulation research on the flow characteristics of gas-liquid-solid three-phase *** specific research is as follows:Firstly,the effects of factors such as slurry flow velocity,hydrate particle density,hydrate particle size,and hydrate volume fraction on the stratified smooth flow were specifically *** test obtained particle size has the most influence on the particle concentration *** slurry flow velocity is gradually increased based on stratified smooth *** flow patterns were observed and their characteristics were ***,increasing the slurry velocity to 2 m/s could achieve the slurry flow pattern of partial hydrate in the pipeline transition from stratified smooth flow to wavy *** the flow rate increases to 3 m/s,a violent wave forms throughout the entire *** on wave flow,as the velocity increased to 4 m/s,and the flow pattern changed to slug *** the particle concentration was below 10%,the increase of the concentration would aggravate the slug flow trend;if the particle concentration was above 10%,the increase of the concentration would weaken the slug flow trend,the increase of particle density and liquid viscosity would weaken the tendency of slug *** relationship between the pressure drop gradients of several different flow patterns is:slug flow>wave flow>stratified smooth flow.

关键词： Hydrate slurry Numerical simulation Multiphase flow Flow field distribution Flow pattern transition

Modular assembly of Co4-thiacalix[4]arene units and Keggin-type SiW12O40 for visible-light photothermal conversion

在线全文

学校读者我要写书评

暂无评论

Tungsten 2025年第1期 112-119页

作者： Jia-hui Li Qing Zhao dong-Ao Mao Kun Zhou Bao-Kuan Chen Yan-Feng Bi School of Petrochemical Engineering Liaoning Petrochemical University

The construction of metal-organic coordination clusters（MCCs） using modular secondary building units is an important method for preparing functional *** this study,two new MCCs modularly assembled from Keggin-type {SiW12O40}H4TC4A=p-tert-Butylthiacalix[4]arene(SiW12) units and thiacalixarene-supported Co4-thiacalix[4]arene(Co4-TC4A polynuclear second-building units（PSBUs,H4TC4A=p-tert-Butylthiacalix[4]arene） are *** two MCCs,abbreviated as Co4-SiW12and Co8-SiW12,were structurally characterized by single-crystal X-ray *** Co4-SiW12is a supramolecular structure involving cation-anion interactions between Co4-TC4A PSBUs and ***8-SiW12features "barbell-like" shapes with two Co4-TC4A coordinatively linked to a Keggin-type SiW12unit on opposite via W-O_t-Co *** coordination of Co4-TC4A to SiW12in Co8-SiW12resulted in significantly improved photothermal conversion performances compared with Co4-SiW12and pure SiW12or ***-gap determination and photophysical analysis combined with density functional theory calculations indicated the binding mode between Co4-TC4A PSBUs and SiW12,which considerably influences the way of electron transport and the conversion ability of visible light to heat.

关键词：

输尿管软镜碎石术治疗38 例肾下盏结石的临床疗效分析

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

中国血液流变学杂志 2019年第2期29卷 189-192页

作者：施东辉杜春明杨祖佑何兆飞张君俊苏州市吴中人民医院泌尿外科江苏苏州215128

目的探讨利用电子输尿管软镜联合钬激光碎石术治疗单纯性肾下盏结石的治疗效果并分析术后结石残留的影响因素.方法回顾性分析研究2016年6月-2018年12月泌尿外科利用电子输尿管软镜钬激光碎石术治疗的38 例单纯性肾下盏结石患者的临床... 详细信息

目的探讨利用电子输尿管软镜联合钬激光碎石术治疗单纯性肾下盏结石的治疗效果并分析术后结石残留的影响因素.方法回顾性分析研究2016年6月-2018年12月泌尿外科利用电子输尿管软镜钬激光碎石术治疗的38 例单纯性肾下盏结石患者的临床资料.结石直径1~2 cm.术后1 个月予以复查泌尿系B超及CT,残余结石直径≥4 mm为有临床意义的结石残余.分析术中寻石成功率、术后并发症发生率、结石再次治疗率、结石清除率及其可能的影响因素.结果 38 例手术均顺利实施完成,术中寻石成功率为100%,肾下盏结石清除率达到81.58%(31/38),结石再次治疗率18.42%(7/38),术后平均住院时间3~7 d,3 例患者出现术后发热,1 例患者出现严重血尿,经对症治疗后均好转痊愈.无临床严重并发症如输尿管穿孔、输尿管撕脱及尿脓毒血症等发生.结石大小、结石CT值、肾盂积水、肾下盏解剖结构等多种影响因素均可能造成术后结石残留.结论电子输尿管软镜钬激光碎石术处理1~2 cm肾下盏结石具备微创、安全可靠及有效的优势,是值得推广的肾下盏结石腔内手术方式,但结石残留发生率仍与多种影响因素相关.

关键词：输尿管软镜钬激光肾下盏结石输尿管软镜碎石术影响因素

Study on the lift and propulsive force shares to improve the flight performance of a compound helicopter

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

Chinese Journal of Aeronautics 2022年第1期35卷 365-375页

作者： Kelong YANG dong HAN Qipeng shi Key Laboratory of Science and Technology on Rotorcraft Aeromechanics College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China

To investigate the effects of lift and propulsive force shares on flight performance,a compound helicopter model is *** model consists of a helicopter model,a wing model and a propeller *** a low speed of 100 km/h,the Lift-to-Drag ratio(L/D)of the compound helicopter is improved when the wing provides 20.2%of the take-off *** high speeds,the L/D can be improved when the propeller provides the total propulsive *** the main rotor speed increases the wing lift share,however,the maximum L/D increases first and then *** maximum L/D increases with decreasing the blade twist of the main *** the blade twist from-16°to-8°increases the maximum L/D by 2.3%,and the wing lift share is increased from 65.0%to 74.7%.When the main rotor torque is balanced by the rudder,the maximum L/D is increased by 2.2%without changing the wing lift *** wing should provide more lift as increasing the take-off weight,which reduces the induced power of the main rotor and increases the L/*** increasing the take-off weight from 9500 kg to 11000 kg,the maximum L/D is increased by 6.5%,and the wing lift share is increased from 74.7%to 80.2%.

关键词： Compound helicopter Flight performance Lift share Lift-to-Drag ratio Propeller Propulsive force share Wing

盐酸坦洛新在输尿管结石体外冲击波碎石后辅助排石治疗的临床疗效分析

在线全文

学校读者我要写书评

暂无评论

中外医疗 2018年第25期37卷 117-118,121页

作者：杨祖佑杜春明施东辉何兆飞张君俊江苏苏州市吴中人民医院泌尿外科江苏苏州215128

目的探讨坦洛新在输尿管结石体外冲击波碎石后辅助排石的临床疗效。方法方便选取2016年1月—2017年12月该院收治的210例输尿管结石冲击波碎石患者,随机分为实验组(n=118)和对照组(n=92),两组均给予体外冲击波碎石治疗,实验组加以盐酸坦... 详细信息

目的探讨坦洛新在输尿管结石体外冲击波碎石后辅助排石的临床疗效。方法方便选取2016年1月—2017年12月该院收治的210例输尿管结石冲击波碎石患者,随机分为实验组(n=118)和对照组(n=92),两组均给予体外冲击波碎石治疗,实验组加以盐酸坦洛新治疗。比较两组治疗效果。结果实验组结石7 d及14 d清除率分别为68.64%,88.98%,均显著高于对照组的55.43%,78.26%,差异有统计学意义(χ~2=4.159、4.391,P=0.041、0.036);实验组严重肾绞痛发生率、二次碎石率、直径≥0.6 cm较小结石排尽率分别为9.32%、9.32%、85.88%,与对照组的20.65%、19.57%、68.75%比较差异有统计学意义(χ~2=5.647、4.880、8.287,P=0.017、0.027、0.004);两组直径<0.6 cm排尽率相当,差异有统计学意义(χ~2=1.454,P=0.228)。结论盐酸坦洛新在输尿管结石体外冲击波后起着一定的促进排石作用,能够减少严重肾绞痛发生率,减少患者痛苦。

关键词：输尿管结石冲击波碎石盐酸坦洛新排石治疗