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A new insight into cattle's maternal origin in six Asian countries

Journal of Genetics and Genomics 2010年第3期37卷 173-180页

作者： Shangang Jia Yan zhou Chuzhao Lei Ru yao Zhiying Zhang Xingtang {2. Hong Chen college of Animal Science and Technology Northwest A & F University Shaanxi Key Laboratory of Molecular Biology for Agriculture Yangling 712100 China Beijing Institute of Genomics Chinese Academy of Sciences Beijing 100029 China Graduate university of Chinese Academy of sciences Beijing 100094 China State Key Laboratory of Cognitive Neuroscience and Learning (Beijing Normal university) Beijing 100875 China Institute of Cellular and molecular Biology Xuzhou Normal University Xuzhou 221116 China

The domestication of cattle fuelled the development of agricultural society in the history of human being. The evolution and genetic relationship of cattle can be elucidated by investigating the variation of mitochondrial DNA （mtDNA） D-loop sequence. In this study, we built a cattle phylogeny with a pool of 856 individual D-loop sequences, of which 2.4 Chinese cattle D-loop sequences were obtained in this study （141 ones were first analyzed, and 12. were first submitted） and the rest sequences of cattle from six Asian countries （Japan, Korea, Mongolia, Nepal, India and china） were retrieved from GenBank. Our results indicated that cattle from six Asian eounlries fell into three clades, Bos taurus （taurine）, Bos indicus （zebu） and yak. Four main haplogroups T1A, T2. T3 （including T3A and T3B） and T5 were found in taurine, and two haplogroups I1 and 12.in zebu. Furthermore, we found that I1 and 12.haplogroups were separated by four variable sites rather than five ones and four haplogroups or sub-haplogroups of T1A, T3A, T3B and T5 were found for the first time in these Asian cattle. These data brought us a new insight into cattle＇s genetic structure in these six Asian countries. The geographical distribution of haplogroups was also outlined to provide systematic information on cattle genetic resources.

关键词： D-loop Asia maternal origin mtDNA

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Dynamic Photoresponsive Ultralong Phosphorescence from One-Dimensional Halide Microrods Toward Multilevel Information Storage

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CCS chemistry 2023年第12期5卷 2866-2876页

作者： Chang Xing Bo zhou Dongpeng Yan Wei-Hai fang Key Laboratory of Theoretical and Computational Photochemistry Ministry of EducationCollege of ChemistryBeijing Normal UniversityBeijing 100875

Ultralong room temperature phosphorescence(RTP)has drawn much attention in fields such as optical imaging,sensors,information security,and so *** meet the need for intelligent systems,the development of photoresponsive ultralong RTP materials is highly desirable;however,it remains a challenge due to the lack of rational design strategies that can leverage RTP and photochromism ***,we report a new type of one-dimensional(1D)metal–organic halides(MOHs)that simultaneously exhibited dynamic ultralong RTP and photochromic optical waveguide with a large switching ratio,obvious visualization contrast,and robust *** properties facilitate future applications for multicolor photonic barcodes and optical logic ***,benefiting from the color-time-space multidimensional tunable ultralong RTP,this 1D microrod displayed a multimode luminescent signal output,with significantly higher information storage capacity than typical fluorescent ***,this work demonstrates a new 1D color-tunable optical waveguide and photoresponsive ultralong RTP based on molecular self-assembly of MOHs and extends frontier photonic applications as multilevel data encryption and information storage at the micro/nanoscale.

关键词： metal-organic halides low-dimensional microcrystals room temperature phosphorescence photochromism optical waveguide

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Understanding the role of tungsten on Pt/CeO_(2.for vinyl chloride catalytic combustion

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Journal of Rare Earths 2022年第9期40卷 1462-1470,I0005页

作者： Qifeng Zhang Zhengbo zhou Tian fang Han Gu Yanglong Guo Wang{2. Zhan Yun Guo Li Wang Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis School of Chemistry&Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

Spherical CeO_(2.synthesized by the hydrothermal process was used as support to prepare Pt/WO_(3)/CeO_(2.,and the effects of tungsten(W)contents on activity,stability and polychlorinated by-products were investigated to understand the role of W for vinyl chloride(VC)catalytic *** introduction of12.wt%W to Pt/CeO_(2.(P12.WC)exhibits the highest catalytic activity with 90%conversion of VC at 2.0℃,meanwhile the stability improves and the polychlorinated by-products in the tail gas significantly decrease due to the removal of dissociated Cl species in the formation of *** beneficial effects of W on Pt/CeO_(2.are closely related to the chemical state of Pt,redox and surface acid sites *** doped W not only makes Pt disperse evenly on the support with the high valence,but also weakens the interaction between Pt and CeO_(2.by the formation of Pt-O-W and Pt-O-W-O-Ce species,which facilitates oxygen *** addition,the modification of W species also significantly increases the surface acidity amount and changes the distribution of acid sites.

关键词： Tungsten oxides Vinyl chloride Catalytic oxidation Pt/CeO_(2. By-products Rare earths

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苯氧乙醇耦合酸/碱预处理竹屑中残留木质素对其纤维素酶水解的影响

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林产化学与工业 2024年第4期44卷 87-99页

作者：赵晓雪郑雅月李若琳姚双全勇强黄曹兴周雪莲南京林业大学、江苏省林业资源高效加工利用协同创新中心江苏南京210037 广西清洁化制浆造纸与污染控制重点实验室、广西大学轻工与食品工程学院广西南宁530004 中国林业科学研究院林产化学工业研究所、江苏省生物质能源与材料重点实验室江苏南京210042

以竹加工剩余物竹屑为对象,探究苯氧乙醇耦合酸/碱溶液预处理竹屑,分析了预处理后竹屑中残留木质素的结构特性和理化性质,并通过荧光光谱和表面等离子共振技术揭示不同方法预处理后的竹屑中残留木质素对纤维素酶的非生产性吸附机制。结... 详细信息

以竹加工剩余物竹屑为对象,探究苯氧乙醇耦合酸/碱溶液预处理竹屑,分析了预处理后竹屑中残留木质素的结构特性和理化性质,并通过荧光光谱和表面等离子共振技术揭示不同方法预处理后的竹屑中残留木质素对纤维素酶的非生产性吸附机制。结果表明:随着苯氧乙醇体系中酸/碱加入,酶解72.h预处理竹屑的纤维素酶解得率从9.39%提高到67.38%和55.41%。对残留木质素进行表征,发现当温度升高,木质素的紫丁香基/愈创木基结构单元(S/G)的比值增高,且木质素相对分子质量分布更均匀。2.-HSQC NMR、^(31)P NMR、表面电荷及疏水性等测试结果表明:木质素对纤维素酶水解的抑制作用与其酚羟基含量、疏水性和Zeta电位有关。荧光光谱和表面等离子共振技术表明:木质素与纤维素酶作用的主要驱动力类型与预处理温度、苯氧乙醇体系中酸/碱溶液的加入相关。不同预处理竹屑中木质素与纤维素酶的亲和力不同,其中纯苯氧乙醇预处理竹屑中木质素与纤维素酶的亲和力最高,其次为纯酸/纯碱溶液预处理的木质素,而苯氧乙醇与酸/碱耦合预处理竹屑中木质素对纤维素酶的亲和力最低。

关键词：竹屑苯氧乙醇酸/碱预处理残留木质素酶水解

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Melting Mechanism and Structure Evolution of Au Nanofilms Explored by molecular Dynamics Simulations

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Chinese Journal of Chemical Physics 2015年第5期28卷 -页

作者： Guo-bing zhou Zhen Yang fang-jia Fu Na Hu Xiang-shu Chen Duan-jian Tao college of chemistry and Chemical Engineering Jiangxi Inorganic Membrane Materials Engineering Research Center Jiangxi Normal University Nanchang 330022 China

The melting mechanism and structure evolution of two-dimensional Au nanofilms with different thicknesses have been investigated in detail by using classical molecular dynamics simulations. The simulation results demonstrate that all Au nanofilms display a two-stage melting behavior of surface premelting and homogenous melting. Furthermore, the premelting behavior only occurs in the outermost layers but the other inner layers always keep a stable solid state until the corresponding melting point, which is different from the premelting behavior from surface into the interior in zero-dimensional Aunanocluster and one-dimensional Aunanowire. Meanwhile, the increase of nanofilm thickness can lead to an increase of melting point. During the premelting process, the surface reconstruction from the {100} plane to the {111} plane has directly been observed at a atomic level for all Au nanofilms. However even for the thinnest L2.nanofilm, the surface stress can't induce such surface reconstruction until temperature is up to 500 K, while similar surface reconstruction induced by surface stress can be observed at much lower temperature for the Aunanowire due to its higher surface-to-volume ratios compared to the Au nanofilm. In addition, our simulation results show that the thinnest Au nanofilm with two atomic layers can be broken into independent one-dimensional nanowires when the temperature reaches a certain value.

关键词： Phase transition Surface reconstruction Au nanofilm molecular dynamics simulation

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Two-dimensional perovskite Pb_(2.Nb_(3)O_(10) photodetectors

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Journal of Materials Science & Technology 2023年第33期164卷 95-101页

作者： Yong Zhang Jian yao Zhen Zhang Rong Zhang Li Li Yu Teng Zongjie Shen Lixing Kang Limin Wu Xiaosheng fang School of Electronic and Information Engineering Changshu Institute of TechnologyChangshu 215500China Division of Advanced Materials Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China Department of Materials Science State Key Laboratory of Molecular Engineering of PolymersFudan UniversityShanghai 200433China college of chemistry and Chemical Engineering Inner Mongolia UniversityHohhot 010021China

For the first time,we report high-performance two-dimensional(2.)perovskite Pb_(2.Nb_(3)O_(10) photodetectors(PNO PDs).The few-layer PNO nanosheets are obtained successfully through a simple calcination and liquid exfoliation *** individual PNO nanosheet devices with various structures(Au-PNO-Au,Au-PNO-Ti,Ti-PNO-Ti)are fabricated and *** Au-PNO-Ti device exhibits a high rectification factor(∼102.owing to a large Schottky barrier difference between the PNO nanosheet and two asymmetric ***,the Au-PNO-Ti device shows excellent self-powered performance,including high responsivity(2.8 A/W),high detectivity(1.1×10^(12. Jones),and fast speed(0.2.1.2.ms)at 350 nm light *** work not only suggests the performance of the PNO nanosheet PDs but also sheds light on the development of high-stability and high-performance devices based on 2. perovskite niobate in the future.

关键词： Pb2.b3O10 Photodetectors Self-powered Two-dimensional Perovskite

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Synthesis of Meta Symmetric 1T'-WTe2.Using an Edge-Induced Mechanism

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Chinese Journal of chemistry 2020年第7期38卷 709-713页

作者： yao Xiao Mengyue zhou Jinglu Liu Bin Wei Shuanglin Yue Yuan zhou Kena Yang Tao Zhang Mengqi Zeng Zhongchang Wang Lei Fu The Institute for Advanced Studies(IAS) Wuhan UniversityWuhanHubei 430072China college of chemistry and {2. sciences Wuhan UniversityWuhanHubei 430072China Department of Quantum Materials Science and Technology International Iberian Nanotechnology Laboratory(INL)Avenida Mestre Jose VeigaBraga 4715-330Portugal Department of Electronics Peking UniversityBeijing 100871China School of Physics and Technology Wuhan UniversityWuhanHubei 430072China

Lattice symmetry is vital to the properties of two-dimensional(2.)materials,yet their fixed symmetry cannot meet the increasing requirements in highly eficient and programmable electrical *** the structural diversity of 2. materals,as demon-strated by 1T'-WTez,is improved without any phase transition or structural reconstruction,excellent metallic 1T'-WTez would be possibly used for inte-grated ***,we realized meta symmetry of 1T'-WTez by using an edge-induced mechanism,which is recognized as the combination of the intrin-sic C2. symmetry and sixfold *** account of the dynamically controlled growth,the meta symmetric 1T'-WTez with^94.9%purity is obtained for the first *** symmetry will also keep the intrinsic electrical properties of 1T'-WTez over the *** meta symmetry could not only enrich the structural diversity of 1T'-WTez,but also be extended to other low-symmetry 2. materials,which would be promising for customized circuits and devices.

关键词： symmetry purity electrical

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Heterogeneous catalytic dehydrogenative coupling of ethylene glycol and primary alcohols intoα-hydroxycarboxylic acids

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中国科学:化学英文版 2023年第9期66卷 2583-2589页

作者： Shuheng Tian Jiarui Li Xingjie Peng yao Xu Maoling Wang Haoyi Tang Wu zhou Meng Wang Ding Ma Beijing National Laboratory for molecular sciences New Cornerstone Science LaboratoryCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China School of Physical sciences and CAS Key Laboratory of Vacuum sciences University of Chinese Academy of SciencesBeijing 100049China

Lactic acid and otherα-hydroxycarboxylic acids(α-HCAs)play crucial roles in various ***α-HCAs from biomass platform feedstocks such as ethylene glycol(EG)and primary alcohols is novel and *** was reported that the dehydrogenative cross-coupling of EG and primary alcohols can be achieved via homogeneous ***,we report a heterogeneous catalytic strategy to produce a series ofα-HCAs through the same reaction *** catalytic activity and selectivity were achieved using various metals(Ru,Ir,Pt and Pd)supported on the nanodiamond-graphene(ND@G),with Ru exhibiting the best *** universally applicable process enables the easy synthesis of gram-scaleα-HCAs,providing a straightforward and compelling C–C bond cross-coupling strategy for the utilization of alcohols derived from biomass feedstocks.

关键词： heterogeneous catalysis dehydrogenative cross-coupling α-hydroxycarboxylic acids

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A combined experimental and computational study of NHC-catalyzed allylation of allenoate with MBH esters:new regiospecific and stereoselective access to 1,5-enyne

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Organic chemistry Frontiers 2022年第1期9卷 51-57页

作者： fang Sun fangfang Lu Xue Song Wenchao Wu Kai Zhang Chenxia Yu Tuanjie Li Donghui Wei Changsheng yao Jiangsu Key Lab of Green Synthetic chemistry for Functional Materials School of Chemistry and Materials ScienceJiangsu Normal UniversityXuzhouJiangsu 221116P R China. The college of chemistry and {2. Engineering Zhengzhou University100 Science AvenueZhengzhouHenan 450001P R China

An NHC-catalyzed regiospecific allylation ofα-substituted allenoates with MBH carbonates derived from aryl aldehyde furnished highly functionalized 1,5-enynes bearing a quaternary carbon *** with DFT calculations,the reaction mechanism of this conversion was *** method has the advantages of high regioselectivity,good yields and mild reaction *** transformation not only provided a new access to 1,5-enyne,but also enriched the chemistry of allenoates and NHC catalysis.

关键词： conditions catalysis allyl

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锂离子电池高镍正极材料前体的制备工艺

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化工进展 2024年第9期43卷 5079-5085页

作者：吴剑扬王汝娜陈耀申兰耀于永利蒋宁邱景义周恒辉北京大学化学与分子工程学院北京100871 北京泰丰先行新能源科技有限公司北京102200 防化研究院北京102205

高镍三元正极材料因其高的充放电比容量(2.0mA·h/g),被认为是进一步提升锂离子电池能量密度的一种关键材料。高镍三元正极材料的前体通常采用共沉淀法制备,其性质对最终烧结得到的三元正极材料的性能有显著影响。在共沉淀反应制备前体... 详细信息

高镍三元正极材料因其高的充放电比容量(2.0mA·h/g),被认为是进一步提升锂离子电池能量密度的一种关键材料。高镍三元正极材料的前体通常采用共沉淀法制备,其性质对最终烧结得到的三元正极材料的性能有显著影响。在共沉淀反应制备前体的过程中,氨含量、pH、反应温度、固含量、搅拌速率、杂质等诸多因素共同影响着产物的物理化学性质,增加了合成特定指标三元正极材料的难度。本文探究了具有不同粒径分布,镍含量(镍在镍钴锰三元素中的摩尔分数)分别为88%、90%、92.、94%的高镍三元前体的制备工艺与基本性质。进一步地,选择镍摩尔分数为94%的前体材料,从氨含量、pH及搅拌速率三个方面探究了合成参数对前体产物的影响,发现在相对较低的氨含量、pH以及搅拌速率条件下,更容易制备得到粒径分布均匀、形貌完好的前体,并且得到的三元材料具有更高的放电容量以及首圈库仑效率。

关键词：电化学制备高镍材料正极锂离子电池工艺

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