检索结果-南通市图书馆

Molecular dissection of genetic basis of significant correlation among five morphological traits in rice(Oryza sativa L.)

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2010年第27期55卷 3154-3160页

作者： ZHANG YuShan wang jianbo XU CaiGuo XING YongZhong National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural University Wuhan 430070 China University of Electronic Science and Technology of China Zhongshan College Zhongshan 528402 China

To enhance understanding of the genetic basis of trait correlation in rice,a recombinant inbred line(RIL)population(F6 and F7) from a cross between Zhenshan97 and HR5 was employed to identify main quantitative trait loci(QTLs)and epistatic QTL(E-QTL).Highly significant positive correlations were detected among five traits of heading date(HD),plant height(PH),panicle length(PL),flag leaf length(FLL)and flag leaf width(FLW)in 2 *** to 8 main QTLs were detected for an individual *** E-QTL was detected for ***,4,4 and 5 E-QTLs were detected for FLL,HD,FLW and PL,*** E-QTL individually explained less than 3%of trait variation except *** of QTL results was made in order to dissect the genetic basis of trait *** found that main QTLs with pleiotropic effects and QTL clusters were the main genetic basis of trait *** E-QTL had pleiotropic effects.E-QTL played an important role in the genetic basis of individual trait,but it made a little contribution to trait correlation.

关键词：形态性状遗传基础 Oryza 水稻解剖 QTL检测 QTLs 电子邮件

Transmission electron microscopic study of the fine-grained vein matrix in the Suizhou L6 meteorite

在线全文

学校读者我要写书评

暂无评论

Acta Geochimica 2016年第2期35卷 105-110页

作者： Xie Xiande wang jianbo Gu Xiangping Xiong Yi Jia Shuangfeng Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of Geochemistry Chinese Academy of SciencesGuangzhou 510640 China Center for Electron Microscopy Wuhan UniversityWuhan 430072 China School of Geosciences and Info-Physics Central South University Changsha 410083 Hunan China Guangdong Provincial Key Laboratory of Mineral Physics and Materials Guangzhou 510640 China

The mineralogy of shock vein matrix in the Suizhou meteorite has been investigated by optical and transmission electron microscopy. It was revealed that the vein matrix is composed of majorite-pyrope garnet, mag- aesiowtistite, and ringwoodite, with FeNi-FeS inter- growths. The observation and character of ring-like selected electron diffraction （SAED） patterns indicate that Lhe idiomorphic garnet crystals in the vein matrix have different orientations. The polycrystalline nature of magnesiowtistite is also confirmed by a ring-like SAED pattern. Both garnet and magnesiowtistite crystals showed sharp Jiffraction spots, signifying the good crystallinity of these ：wo minerals. The SAED pattern of cryptocrystalline 5ngwoodite shows only diffuse concentric diffraction tings. FeNi metal and troilite （FeS）, which were molten during the shock event, occur in the matrix as fine eutectic FeNi-FeS intergrowths filling the interstices between garaet and magnesiowiistite grains. Based on the phase dia- gram of the Allende chondrite and the results of this TEM study, it is inferred that majorite-pyrope garnet first crystallized from the Suizhou chondritic melt at 22-26 GPa, Followed by crystallization of magnesiowtistite at 20-24 GPa, and then ringwoodite at 18-20 GPa. The eutectic intergrowths of FeNi-metal and troilite are proposed to have crystallized during meteorite cooling and solidified at the last stage of vein formation.

关键词： Suizhou meteorite Shock vein matrix. High-pressure minerals Transmission electron microscopy

Construction of Alkenyl-Functionalized Spirocarbocyclic Scaffolds from Alkyne-Containing Phenol-Based Biaryls via Sequential lodine-Induced Cyclization/Dearomatization and Pd-Catalyzed Coupling of N-Tosylhydrazones

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2020年第11期38卷 1257-1262页

作者： Anjia Liu Kaiming Han Xin-Xing Wu Shufeng Chen jianbo wang Inner Mongolia Key Laboratory of Fine Organic Synthesis College of Chemistry and Chemical EngineeringInner Mongolia UniversityHohhotInner Mongolia 010021China Beijing National Laboratory of Molecular Sciences(BNLMS) Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of ChemistryPeking UniversityBeijing 100871China

of main obse rvation and conclusion An efficient strategy for the formation of alkenyl-functionalized spirocarbocyclic scaffolds from alkyne-containing phenol-based biaryls via sequential iodine-induced cyclization/dearomatization and Pd-catalyzed coupling of N-tosylhydrazones is *** approach provides various spirocarbocyclic compounds in moderate to excellent yields with good functional *** results also demonstrate the feasibility for the direct cross-couplings of N-tosyl hydrazones with sterically congested tetrasubstituted alkenyl halides.

关键词： coupling substituted Phenol

Microstructure and properties characteristic during interrupted multi-step aging in Al-Cu-Mg-Ag-Zr alloy

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

Rare Metals 2011年第4期30卷 419-423页

作者： ZHUBaohong XIONG Baiqing ZHANG Yong＇an ZHANG jianbo wang Feng LI Zhihui State Key Laboratory of Nonferrous Metals and Processes General Research Institute for Nonferrous Metals Beijing 100088 China

The effects of interrupted multi-step aging on the microstructure and properties of A1-Cu-Mg-Ag-Zr alloy were studied by tensile, hardness, electrical conductivity tests and transmission electron microscopy （TEM）. Interrupted multi-step aging delayed the peak aging time compared to one-step aging and kept the same levels of hardness, electrical conductivity, ultimate tensile strength （UTS）, yield strength （YS） and elongation as those of the T6 temper alloy while increased the fracture toughness notably. Ω phase and a little θ＇ phase precipitated and grew simultaneously in the process of one-step aging at 160℃. During the second-step aging at 65℃ of interrupted multi-step aging, no TEM characteristic of Ω precipitates could be found. During the third step of interrupted multi-step aging, Ω began to dominate the microstructure like what happened in the process of one-step aging. The difference of properties between the T6 temper and the interrupted multi-step aged alloys might be related to the different precipitation sequences in the process of the two heat treatment technologies.

关键词： aluminum copper alloys heat treatment microstructure fracture toughness aging

在线全文

学校读者我要写书评

暂无评论

斑驳病3例基因变异检测及基因型与表型分析

中华皮肤科杂志 2024年第1期57卷 50-53页

作者：段紫钰段晓君薛晨红张守民李振鲁李建国王建波河南省人民医院郑州大学人民医院河南大学人民医院皮肤科郑州450003 河南省生殖健康科学技术研究院河南生殖妇产医院郑州450008

目的确定3例斑驳病患者的致病基因变异位点,探讨斑驳病基因型与表型的关系.方法2019年1月至2021年12月于河南省人民医院皮肤科收集3例斑驳病患者及其父母临床资料,采集他们和100例无亲缘关系的健康对照外周血标本,提取全血DNA.应用全外... 详细信息

目的确定3例斑驳病患者的致病基因变异位点,探讨斑驳病基因型与表型的关系.方法2019年1月至2021年12月于河南省人民医院皮肤科收集3例斑驳病患者及其父母临床资料,采集他们和100例无亲缘关系的健康对照外周血标本,提取全血DNA.应用全外显子测序技术筛选患者基因变异位点,Sanger测序验证.通过致病性分析软件评估变异位点的有害性.结果例1男,23岁,额部和胸腹部白斑23年,父母未患病;例2男,1岁5个月,额部和腹部白斑1年,父母未患病;例3男,6岁,额部和四肢白斑6年,父母未患病.3例患者分别存在KIT基因14号外显子错义变异c.2033T>C(p.L678P)、18号外显子剪接位点变异c.2485-1G>C和16号外显子杂合错义变异c.2346C>G(p.F782L),而患者父母及100例健康对照均未发现上述3处变异.3个变异均为新致病变异位点,且均为有害致病变异位点.结论本研究在3例斑驳病患者中检测到3个新致病变异位点,即KIT基因c.2033T>C(p.L678P)、c.2485-1G>C和c.2346C>G(p.F782L).进一步验证了该病严重程度与KIT基因变异的类型及位置密切相关.

关键词：花斑 DNA突变分析基因型表型色素沉着不足斑驳病 KIT基因

Palladium（o）-Catalyzed Si-Si Bond Insertion by the Terminal Nitrogen of Diazo Compoundst

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2018年第10期36卷 945-949页

作者： Zhenxing Liu Tianren Fu Jingfeng Huo Sheng Feng jianbo wang Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education College of Chemistry Peking University Beijing 100871China

The palladium（o）-catalyzed nitrogen insertion into cyclic Si-Si bonds has been realized by using N-tosylhydrazones/diazo compounds as the nitrogen source. The palladium（Ⅱ） nitrene formation and subsequent migrato... 详细信息

关键词： insertion diazo compounds Si-Si bond palladium catalysts palladium(Ⅱ) nitrene carbenes

中药联合神经肌肉关节促进技术对老年脑卒中伴弛缓性瘫痪功能障碍患者预后的影响

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

中华老年多器官疾病杂志 2024年第7期23卷 532-536页

作者：马国立王建波齐有莉河北省退役军人总医院药剂科河北邢台054000

目的探讨补肾活血中药汤剂联合神经肌肉关节促进技术对老年脑卒中伴弛缓性瘫痪功能障碍患者预后的影响。方法选择2021年2月至2023年1月河北省退役军人总医院收治的老年脑卒中伴弛缓性瘫痪功能障碍患者112例,通过简单随机分组法分为2组,... 详细信息

目的探讨补肾活血中药汤剂联合神经肌肉关节促进技术对老年脑卒中伴弛缓性瘫痪功能障碍患者预后的影响。方法选择2021年2月至2023年1月河北省退役军人总医院收治的老年脑卒中伴弛缓性瘫痪功能障碍患者112例,通过简单随机分组法分为2组,每组56例。对照组给予神经肌肉关节促进技术,观察组在对照组治疗基础上联合补肾活血中药汤剂治疗。比较两组患者临床疗效,治疗前后髋关节和膝关节最大屈曲角、最大伸展角,腓肠肌、胫前肌表面肌电信号,血液流变学指标[高切与低切全血比黏度(WBV)、血浆黏度(PV)、红细胞压积(HCT)]、Fugl-Meyer下肢运动功能评估表(FMA)及日常生活活动能力量表Barthel指数(ADL-Barthel)评分。采用SPSS 20.0软件进行数据分析。根据数据类型,组间比较分别采用t检验及χ^(2)检验。结果观察组治疗显效率(67.86%)高于对照组(48.21%),差异有统计学意义(P<0.05);两组有效率比较,差异无统计学意义。治疗6周和治疗2个月后,观察组和对照组高切WBV、低切WBV、PV、HCT水平均低于治疗前水平,以及同一时间对照组水平;髋关节的最大屈曲角、最大伸展角,膝关节的最大屈曲角、最大伸展角均大于治疗前水平,以及同一时间对照组水平;腓肠肌的均方根值(RMS)、肌电积分值(IEMG),胫前肌的RMS、IEMG均高于治疗前水平,以及同一时间对照组水平;FMA、ADL-Barthel评分均高于治疗前水平,以及同一时间对照组水平,差异均有统计学意义(P<0.05)。治疗2个月后,观察组和对照组高切WBV、低切WBV、PV、HCT水平均低于治疗6周水平;髋关节的最大屈曲角、最大伸展角,膝关节的最大屈曲角、最大伸展角均大于治疗6周水平;腓肠肌的RMS、IEMG,胫前肌的RMS、IEMG均高于治疗6周水平;FMA、ADL-Barthel评分均高于治疗6周水平,差异均有统计学意义(P<0.05)。结论补肾活血中药汤剂联合神经肌肉关节促进技术可以更好地改善老年脑卒中伴弛缓性瘫痪功能障碍患者血液流变学和运动功能,促进其生活能力恢复。

关键词：老年人脑卒中弛缓性瘫痪补肾活血中药汤剂神经肌肉关节促进技术功能障碍

Spin-dependent Transport Properties of CrO_2 Micro Rod

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2014年第4期6卷 365-371页

作者： Zhen wang Li Xi Yikai Yang Yue Li Xuemeng Han Yalu Zuo jianbo wang Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education Lanzhou University

The Cr O2 micro rod powder was synthesized by decomposing the Cr O3 flakes at a specific temperature to yield precursor and annealing such a precursor in a sealed glass tube. The magneto-transport properties have been measured by a direct current four-probe method using a Cu/Cr O2rods/colloidal silver liquid electrode sandwich device. The largest magnetoresistance(MR) around *72 % was observed at 77 K with applied current of 0.05 l A. The non-linear I–V curve indicates a tunneling type transport properties and the tunneling barrier height is around 2.2 ± 0.04 e V at 77 K, which is obtained with fitting the non-linear I–V curves using Simmons' equation. A mixing of Cr oxides on the surface of Cr O2 rod observed by X-ray photoemission spectroscopy provides a tunneling barrier rather than a single phase of Cr2O3 insulating barrier. The MR shows strong bias voltage dependence and is ascribed to the two-step tunneling process.

关键词： CrO2 rod Low-field magnetoresistance Tunneling barrier Bias voltage dependence

Height connection across sea by using satellite altimetry data sets,ellipsoidal heights,astrogeodetic deflections of the vertical,and an Earth Gravity Model

在线全文

学校读者我要写书评

暂无评论

Geodesy and Geodynamics 2023年第4期14卷 347-354页

作者： jianbo wang Xinmin Qi Kai Luo Zhengyuan Li Ruikang Zhou Jinyun Guo The School of Marine Technology and Geomatics Jiangsu Ocean UniversityLianyungang 222005China The Key Laboratory of Marine Environmental Survey Technology and Application Ministry of Natural ResourcesGuangzhou 510300China The South China Sea Marine Survey and Technology Center State Oceanic AdministrationGuangzhou 510300China The College of Geodesy and Geomatics Shandong University of Science and TechnologyQingdao 266590China

Islands and the mainland are separated by seas,and the distances between them might be so long that the height on the mainland cannot be exactly translated to the islands,resulting in different height systems on the mainland and the *** this study,we used astrogeodetic deflections of the vertical and ellipsoidal heights of points on the mainland and island near their coastlines to implement height connection across sea ***,the modeled gravity and modeled astrogeodetic vertical deflections of segmentation points along connecting routes over the sea between the mainland and the island were determined by Earth Gravity Model(EGM),and the ellipsoidal heights of segmentation points were determined by the satellite altimetry data ***,we used a linear interpolation model to increase the precision of the vertical deflections of segmentation ***,we computed the geopotential difference of points between the mainland and the island using a method derived from geopotential theory and the astronomical leveling ***,we estimated the normal height of the point on the island using the geopotential-difference iterative computation *** observed data of normal heights,ellipsoidal heights,and astrogeodetic vertical deflections referring to height sites in Qingdao,Shandong Province,we conducted a numerical experiment involving the normal height connection across sea *** determined the data of the ellipsoidal heights and gravity of segmentation points along the connecting route across the water in the numerical experiment using *** distance of the height connection across the sea was approximately 10.5 *** to China's official leveling specifications,the experimental results met the criterion of third-class leveling precision.

关键词： Height datum connection across sea areas Geopotential difference Normal heights Astrogeodetic vertical deflections Islands