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116篇 您的检索式:作者名="Congcong Wang"
    题名 作者 年代 出处 被引量
1Stable classi?cation with limited sample: transferring a 30-m resolution sample set collected in 2015 to mapping 10-m resolution global land cover in 2017显示文摘As the world strives to reduce the impact of population growth, urbanization, agricultural expansion, and climate change on food security, energy and water shortage, resource over-exploration, biodiversity loss, environmental pollution, and ultimately human health, timely and higher resolution land cover information is urgently needed to achieve the sustainable development goals of the United Nations.Peng Gong Han Liu Meinan Zhang Congcong Li Jie Wang Huabing Huang Nicholas Clinton Luyan Ji Wenyu Li Yuqi Bai Bin Chen Bing Xu Zhiliang Zhu Cui Yuan Hoi Ping Suen Jing Guo Nan Xu Weijia Li Yuanyuan Zhao Jun Yang Chaoqing Yu Xi Wang Haohuan Fu Le Yu Iryna Dronova Fengming Hui Xiao Cheng Xueli Shi Fengjin Xiao Qiufeng Liu Lianchun Song 2019Science Bulletin2019,64,6:166
2China’s urban expansion from 1990 to 2010 determined with satellite remote sensing显示文摘Based on the same data source of Landsat TM/ETM+ in 1990s,2000s and 2010s,all urban built-up areas in China are mapped mainly by human interpretation.Mapping results were checked and refined by the same analyst with the same set of criteria.The results show during the last 20 years urban areas in China have increased exponentially more than 2 times.The greatest area of urbanization changed from Northeastern provinces in 1990s to the Southeast coast of China in Jiangsu,Guangdong,Shandong,and Zhejiang in 2010s.Urban areas are mostly converted from croplands in China.Approximately 17750 km 2 croplands were converted into urban lands.Furthermore,the conversion from 2000 to 2010 doubled that from 1990 to 2000.During the 20 years,the most urbanized provinces are Jiangsu,Guangdong,Shandong and Zhejiang.We also analyzed built-up areas,gross domestic production (GDP) and population of 147 cities with a population of greater than 500000 in 2009.The result shows coastal cities and resource-based cities are with high economic efficiency per unit of built-up areas,resource-based cities have the highest population density,and the economic efficiency of most coastal provinces are lower than central provinces and Guangdong.The newly created urban expansion dataset is useful in many fields including trend analysis of urbanization in China;simulation of urban development dynamics;analysis of the relationship among urbanization,population growth and migration;studies of carbon emissions and climate change;adaptation of climate change;as well as land use and urban planning and management.WANG Lei LI CongCong YING Qing CHENG Xiao WANG XiaoYi LI XueYan HU LuanYun LIANG Lu YU Le HUANG HuaBing GONG Peng 2012Chinese Science Bulletin2012,57,22:64
3Mapping wetland changes in China between 1978 and 2008显示文摘Four wetland maps for all China have been produced,based on Landsat and CBERS-02B remote sensing data between 1978 and 2008 (1978,1990,2000 and 2008).These maps were mainly developed by manual interpretation and validated by substantial field investigation in 2009.Based on these maps,we analyzed the 2008 wetland distribution in China and discussed wetland changes and their drivers over the past 30 years.(i) There were about 324097 km 2 of wetlands in 2008,for which inland marshes or swamps were the most common wetland type (35%),with lakes (26%) second.Most of the wetlands were in Heilongjiang,Inner Mongolia,Qinghai and Tibet,occupying about 55% of the national wetland area.(ii) From 1978 to 2008,China's wetland area continually and significantly decreased,by about 33% based on changes in the wetland map.This was in sharp contrast to the increase in artificial wetlands,which increased by about 122%.Inland marshes accounted for the main loss of total wetlands from 1978 to 2000.From 2000 through 2008,riverine and lacustrine wetlands constituted the main wetland loss.Fortunately however,the rate of wetland loss decreased from 5523 to 831 km 2 /a.(iii) The change ratio of lost natural wetlands (including inland and coastal wetlands) to non-wetlands has decreased slightly over the past 30 years.From 1978 to 1990,nearly all natural wetlands (98%) lost were transformed into non-wetlands.However,the ratio declined to 86% from 1990 to 2000,and to 77% from 2000 to 2008.(iv) All Chinese provinces were divided into three groups according to patterns of wetland changes,which could relate to the driving forces of such changes.Tibet was completely different from other provinces,as it was one representative example in which there was a net wetland increase,because of global warming and decreased human activity since 1990.Increased economic development caused considerable wetland loss in most eastern provinces,and artificial wetlands increased.NIU ZhenGuo ZHANG HaiYing WANG XianWei YAO WenBo ZHOU DeMin ZHAO KuiYi ZHAO Hui LI NaNa HUANG HuaBing LI CongCong YANG Jun LIU CaiXia LIU Shuang WANG Lin LI Zhan YANG ZhenZhong QIAO Fei ZHENG YaoMin CHEN YanLei SHENG YongWei GAO XiaoHong ZHU WeiHong WANG WenQing WANG Hong WENG YongLing ZHUANG DaFang LIU JiYuan LUO ZhiCai CHENG Xiao GUO ZiQi GONG Peng 2012Chinese Science Bulletin2012,57,22:51
4A multi-resolution global land cover dataset through multisource data aggregation显示文摘Recent developments of 30 m global land characterization datasets(e.g., land cover, vegetation continues field) represent the finest spatial resolution inputs for global scale studies. Here, we present results from further improvement to land cover mapping and impact analysis of spatial resolution on area estimation for different land cover types. We proposed a set of methods to aggregate two existing 30 m resolution circa 2010 global land cover maps, namely FROM-GLC(Finer Resolution Observation and Monitoring-Global Land Cover) and FROM-GLC-seg(Segmentation), with two coarser resolution global maps on development, i.e., Nighttime Light Impervious Surface Area(NL-ISA) and MODIS urban extent(MODIS-urban), to produce an improved 30 m global land cover map—FROM-GLC-agg(Aggregation). It was post-processed using additional coarse resolution datasets(i.e., MCD12Q1, GlobCover2009, MOD44 W etc.) to reduce land cover type confusion. Around 98.9% pixels remain 30 m resolution after some post-processing to this dataset. Based on this map, majority aggregation and proportion aggregation approaches were employed to create a multi-resolution hierarchy(i.e., 250 m, 500 m, 1 km, 5 km, 10 km, 25 km, 50 km, 100 km) of land cover maps to meet requirements for different resolutions from different applications. Through accuracy assessment, we found that the best overall accuracies for the post-processed base map(at 30 m) and the three maps subsequently aggregated at 250 m, 500 m, 1 km resolutions are 69.50%, 76.65%, 74.65%, and 73.47%, respectively. Our analysis of area-estimation biases for different land cover types at different resolutions suggests that maps at coarser than 5 km resolution contain at least 5% area estimation error for most land cover types. Proportion layers, which contain precise information on land cover percentage, are suggested for use when coarser resolution land cover data are required.YU Le WANG Jie LI XueCao LI CongCong ZHAO YuanYuan GONG Peng 2014Science China Earth Sciences2014,57,10:24
5DUF221 proteins are a family of osmosensitive calciumpermeable cation channels conserved across eukaryotes显示文摘Congcong Hou Wang Tian Thomas Klelst Kai He Veder Garcia Fenglin Bai Yanli Hao Sheng Luan Legong Li 2014Cell Research2014,24,5:22
6The first all-season sample set for mapping global land cover with Landsat-8 data显示文摘We report the world's first all-season training and validation sample sets for global land cover classification with Landsat-8 data.Prior to this,such samples were only available at a single date primarily from the growing season.It is unknown how much limitation such a single-date sample has to mapping global land cover in other seasons of the year.To answer this question,we selected available Landsat-8 images from four seasons and collected training and validation samples from them.We compared the performances of training samples in different seasons using Random Forest algorithm.We found that the use of training samples from any individual season would result in the best overall classification accuracy when validated by samples in the same season.The global overall accuracy from combined best seasonal results was 67.2% when classifying the 11 Level-1 classes in the Finer Resolution Observation and Monitoring of Global Land Cover(FROM-GLC) classification system.The use of training samples from all seasons(named all-season training sample set hereafter) produced an overall accuracy of 67.0%.We also tested classification within 10° latitude 60° longitude zones using all-season training subsample within each zone and obtained an overall accuracy of 70.2%.This indicates that properly grouped subsamples in space can help improve classification accuracies.All the results in this study seem to suggest that it is possible to use an all-season training sample set to reach global optimality with universal applicability in classifying images acquired at any time of a year for global land cover mapping.Congcong Li Peng Gong Jie Wang Zhiliang Zhu Gregory S. Biging Cui Yuan Tengyun Hu Haiying Zhang Qi Wang Xuecao Li Xiaoxuan Liu Yidi Xu Jing Guo Caixia Liu Kwame O. Hackman Meinan Zhang Yuqi Cheng Le Yu Jun Yang Huabing Huang Nicholas Clinton 2017Science Bulletin2017,62,7:21
7Genome Characteristics and Evolution of Pseudorabies Virus Strains in Eastern China from 2017 to 2019显示文摘Since late 2011,outbreaks of pseudorabies virus(PRV)have occurred in southern China causing major economic losses to the pig industry.We previously reported that variant PRV forms and recombination in China could be the source of continued epidemics.Here,we analyzed samples from intensive pig farms in eastern China between 2017 and 2019,and sequenced the main glycoproteins(gB,gC,gD,and gE)to study the evolution characteristics of PRV.Based on the gC gene,we found that PRV variants belong to clade 2 and detected a founder effect during by the PRV epidemic.In addition,we detected inter-and intra-clade recombination;in particular,inter-clade recombination in the gB genes of strains FJ-ZXF and FJ-W2,which were recombinant with clade 1 strains.We also found specific amino-acid changes and positively selected sites,possibly associated with functional changes.This analysis of the emergence of PRV in China illustrates the need for continuous monitoring and the development of vaccines against specific variants of PRV.Xiaofeng Zhai Wen Zhao Kemang Li Cheng Zhang Congcong Wang Shuo Su Jiyong Zhou Jing Lei Gang Xing Haifeng Sun Zhiyu Shi Jinyan Gu 2019Virologica Sinica2019,34,6:12
8The study on the safety and efficacy of amnion graft for preventing the recurrence of moderate to severe intrauterine adhesions显示文摘Transcervical resection of adhesion(TCRA)is the standard treatment for the intrauterine adhesions,but the recurrence of adhesions is a tough problem for the gynecologist.In addition,the therapeutic strategy after TCRA about prevention of recurrence remains controversial especially for the patients with moderate to severe intrauterine adhesions(IUAs).Hence,we designed this study to explore the safety and efficacy of fresh amnion grafts for preventing the recurrence after TCRA for patients with moderate to severe IUAs.One hundred patients with moderate to severe IUAs who presented with a history of hypomenorrhea,amenorrhea and infertility were included in the study from January 2015 to December 2017.Patients were divided into amnion group(52 patients)and chitosan group(48 patients).Fresh amnion grafts or intrauterine injections of chitosan were administered after TCRA.Transvaginal ultrasonography(TVUS)and hysteroscopy were performed at the first and third month after the operation.The surgical procedures for all patients were completed successfully without relevant complications.In amnion group,8 patients exhibited relapse in the first month and 2 patients in three months after surgery;in chitosan group,23 women exhibited relapse in the first month and 18 patients in three months after surgery.Statistical analysis revealed that the recurrence rate of adhesion in amnion group was significantly lower than those of chitosan group in the first and three months after surgery(P1=0.000,P2=0.000).After TCRA,fresh amnion graft plays a significant role in preventing further adhesions than injections of chitosan.Changjiang Li Aiqi Cai Congcong Sun Benyuan Wu Xinpei Chen Yanhua Mao Yingfeng Zhang Yating Gou Jie Yu Yuhan Wang Huanhuan Yu Jia Wang 2020Genes & Diseases2020,7,2:11
9Assessing environmental factors associated with regional schistosomiasis prevalence in Anhui Province,Peoples’Republic of China using a geographical detector method显示文摘Background:Schistosomiasis is a water-borne disease caused by trematode worms belonging to genus Schistosoma,which is prevalent most of the developing world.Transmission of the disease is usually associated with multiple biological characteristics and social factors but also factors can play a role.Few studies have assessed the exact and interactive influence of each factor promoting schistosomiasis transmission.Methods:We used a series of different detectors(i.e.,specific detector,risk detector,ecological detector and interaction detector)to evaluate separate and interactive effects of the environmental factors on schistosomiasis prevalence.Specifically,(i)specific detector quantifies the impact of a risk factor on an observed spatial disease pattern,which were ranked statistically by a value of Power of Determinate(PD)calculation;(ii)risk detector detects high risk areas of a disease on the condition that the study area is stratified by a potential risk factor;(iii)ecological detector explores whether a risk factor is more significant than another in controlling the spatial pattern of a disease;(iv)interaction detector probes whether two risk factors when taken together weaken or enhance one another,or whether they are independent in developing a disease.Infection data of schistosomiasis based on conventional surveys were obtained at the county level from the health authorities in Anhui Province,China and used in combination with information from Chinese weather stations and internationally available environmental data.Results:The specific detector identified various factors of potential importance as follows:Proximity to Yangtze River(0.322)>Land cover(0.285)>sunshine hours(0.256)>population density(0.109)>altitude(0.090)>the normalized different vegetation index(NDVI)(0.077)>land surface temperature at daytime(LST_(day))(0.007).The risk detector indicated that areas of schistosomiasis high risk were located within a buffer distance of 50 km from Yangtze River.The ecological detector disclosed that the factors investigated have significantly different effects.The interaction detector revealed that interaction between the factors enhanced their main effects in most cases.Conclusion:Proximity to Yangtze River had the strongest effect on schistosomiasis prevalence followed by land cover and sunshine hours,while the remaining factors had only weak influence.Interaction between factors played an even more important role in influencing schistosomiasis prevalence than each factor on its own.High risk regions influenced by strong interactions need to be targeted for disease control intervention.Yi Hu Congcong Xia Shizhu Li Michael PWard Can Luo Fenghua Gao Qizhi Wang Shiqing Zhang Zhijie Zhang 2017Infectious Diseases of Poverty2017,6,1:9
10Genetic bases of source-,sink-,and yield-related traits revealed by genome-wide association study in Xian rice显示文摘The source-sink relationship determines the ultimate grain yield.We investigated the genetic basis of the relationship between source and sink and yield potential in rice.In two environments,we identified quantitative trait loci(QTL)associated with sink capacity(total spikelet number per panicle and thousand-grain weight),source leaf(flag leaf length,flag leaf width and flag leaf area),source-sink relationship(total spikelet number to flag leaf area ratio)and yield-related traits(filled grain number per panicle,panicle number per plant,grain yield per plant,biomass per plant,and harvest index)by genome-wide association analysis using 272 Xian(indica)accessions.The panel showed substantial variation for all traits in the two environments and revealed complex phenotypic correlations.A total of 70 QTL influencing the 11 traits were identified using 469,377 high-quality SNP markers.Five QTL were detected consistently in four chromosomal regions in both environments.Five QTL clusters simultaneously affected source,sink,source–sink relationship,and grain yield traits,probably explaining the genetic basis of significant correlations of grain yield with source and sink traits.We selected 24 candidate genes in the four consistent QTL regions by identifying linkage disequilibrium(LD)blocks associated with significant SNPs and performing haplotype analysis.The genes included one cloned gene(NOG1)and three newly identified QTL(qHI6,qTGW7,and qFLA8).These results provide a theoretical basis for high-yield rice breeding by increasing and balancing source–sink relationships using marker-assisted selection.Yun Wang Yunlong Pang Kai Chen Laiyuan Zhai Congcong Shen Shu Wang Jianlong Xu 2020The Crop Journal2020,8,1:8
11Cloning of Ln Gene Through Combined Approach of Map-based Cloning and Association Study in Soybean显示文摘Increasing yield is one of the most important goals in crop breeding.Soybean(Glycine max L.Merr.),one of the most economically important leguminous seed crops,provides the majority of plant proteins,and more than a quarter of the world's food and animal feed(Graham and Vance,2003). The yield of soybean is finally determined by the number of seeds per unit area,which affected by many characters,such as height,branching number,photosynthesis,seed size,seed number.The number of seeds per pod is taken for one of the critical components that related to yield(You et al.,1995),and it has long been considered in soybean production(Takahashi,Chao Fang Weiyu Li Guiquan Li Zheng Wang Zhengkui Zhou Yanming Ma Yanting Shen Congcong Li Yunshuai Wu Baoge Zhu Weicai Yang Zhixi Tian 2013Journal of Genetics and Genomics2013,40,2:7
12WSe2 2D p-type semiconductor-based electronic devices for information technology:Design,preparation,and applications显示文摘The pioneering exfoliation of monolayer tungsten diselenide has greatly inspired researchers toward semiconducting applications.WSe2 belongs to a family of transition-metal dichalcogenides.Similar to graphene,WSe2 and analogous dichalcogenides have layered structures with weak van der Waals interactions between two adjacent layers.First,the readers are presented with the fundamentals of WSe2,such as types,morphologies,and properties.Here,we report the characterization principles and practices such as microscopy,spectroscopy,and diffraction.Second,the methods for obtaining high-quality WSe2,such as exfoliation,hydrothermal and chemical vapor deposition,are briefly listed.With advantages of light weight,flexibility,and high quantum efficiency,2D materials may have a niche in optoelectronics as building blocks in p-n junctions.Therefore,we introduce a state-of-the-art demonstration of heterostructure devices employing the p-type WSe2 semiconductor.The device architectures include field-effect transistors,photodetectors,gas sensors,and photovoltaic solar cells.Due to its unique electronic,optical,and energy band properties,WSe2 has been increasingly investigated due to the conductivity of the p-type charge carrier upon palladium contact.Eventually,the dynamic research on WSe2 and van der Waals heterostructures is summarized to arouse the passion of the 2D research community.Qilin Cheng Jinbo Pang Dehui Sun Jingang Wang Shu Zhang Fan Liu Yuke Chen Ruiqi Yang Na Liang Xiheng Lu Yanchen Ji Jian Wang Congcong Zhang Yuanhua Sang Hong Liu Weijia Zhou 2020InfoMat2020,2,4:5
13A transceptor-channel complex couples nitrate sensing to calcium signaling in Ambidopsis显示文摘Nitrate-induced Ca^(2+) signaling is crucial for the primary nitrate response in plants.However,the molecular mechanism underlying the generation of the nitrate-specific calcium signature remains unknown.We report here that a cyclic nucleotide-gated channel(CNGC)protein,CNGC15,and the nitrate transceptor(NRT1.1)constitute a molecular switch that controls calcium influx depending on nitrate levels.The expression of CNGC15 is induced by nitrate,and its protein is localized at the plasma membrane after establishment of young seedlings.We found that disruption of CNGC15 results in the loss of the nitrate-induced Ca^(2+) signature(primary nitrate response)and retards root growth,reminiscent of the phenotype observed in the nrt1.1 mutant.We further showed that CNGC15 is an active Ca^(2+)-permeable channel that physically interacts with the NRT1.1 protein in the plasma membrane.Importantly,we discovered that CNGC15-NRT1.1 interaction silences the channel activity of the heterocomplex,which dissociates upon a rise in nitrate levels,leading to reactivation of the CNGC15 channel.The dynamic interactions between CNGC15 and NRT1.1 therefore control the channel activity and Ca^(2+) influx in a nitrate-dependent manner.Our study reveals a new nutrient-sensing mechanism that utilizes a nutrient transceptor-channel complex assembly to couple nutrient status to a specific Ca^(2+) signature.Xiaohan Wang Changxin Feng LiLi Tian Congcong Hou Wang Tian Bin Hu Qian Zhang Zhijie Ren Qi Niu Jiali Song Dongdong Kong Liangyu Liu Yikun He Ligeng Ma Chengcai Chu Sheng Luan Legong Li 2021Molecular Plant2021,14,5:5
14Heteroatom-doped graphene for electrochemical energy storage显示文摘The increasing energy consumption and environmental concerns due to burning fossil fuel are key drivers for the development of effective energy storage systems based on innovative materials.Among these materials,graphene has emerged as one of the most promising due to its chemical,electrical,and mechanical properties.Heteroatom doping has been proven as an effective way to tailor the properties of graphene and render its potential use for energy storage devices.In this view,we review the recent developments in the synthesis and applications of heteroatom-doped graphene in supercapacitors and lithium ion batteries.Yangyang Wen Congcong Huang Lianzhou Wang Denisa Hulicova-Jurcakova 2014Chinese Science Bulletin2014,59,18:5
15Organic-semiconductor: Polymer-electret blends for high-performance transistors显示文摘As compared with polymer semiconductors, solution-processed small-moleculesemiconductors usually have poorer film-formation properties, which induceswide variations in device performance in terms of mobility and threshold voltage,thus severely limiting their commercial applications. In this work, we propose aneasily accessible method to improve the performance and reduce the variabilityof small-molecule organic field-effect transistors (OFETs) by blending organicsemiconductors with an insulator polymer, which is subsequently post-treatedby gate stress to generate an electret. By blending the organic semiconductor2,7-didodecyl[1]benzothieno[3,2-b][1]benzothiophene (C12-BTBT) with the insulatorpolystyrene, uniform transport layers with vertically phase segregated morphologyare obtained, from which the mobility and threshold voltage of OFETs are largelymanipulated. The OFETs exhibit field-effect mobilities as high as 7.5 cm2-V-l-s-1with an on/off ratio exceeding 106 in ambient conditions. This double-layerstructure provides an appropriate architecture for applying gate-stress to injectcharges into the insulating layer, forming an electret. The generation of theelectret is thermally accelerated and thus can be easily realized under moderategate-stress at elevated temperature (e.g., 60 ℃). After cooling, the electret layer servesas a floating-gate, which not only continuously tunes the threshold voltage andfield-effect mobility, but also helps minimize the contact resistances and optimizethe subthreshold swing. As an application of this method, a digital inverter isbuilt and its performance is optimized via in situ tuning of its individual transistors.Peng Wei Shengtao Li Dongfan Li Han Yu Xudong Wang Congcong Xu Yaodong Yang Laju Bu Guanghao Lu 2018Nano Research2018,11,11:5
16Practical consideration for design and optimization of the step feed process显示文摘Based on the anoxic/oxic (A/O) step feed process, a modified University of Cape Town (UCT) step feed process was developed by adding an anaerobic zone and adjusting sludge retum pipeline. Performance evaluation of these two types of processes was investigated by optimizing operational parameters, such as the anaerobic/ anoxic/oxic volumes, internal recycle ratios, and sludge retention times, for removal of chemical oxygen demanding (COD), nitrogen, and phosphorus. Results showed high removal efficiencies of COD of (85.0±1.7)%, ammonium of (99.7±0.2)%, total nitrogen (TN) of (85.5±l.7)%, phosphorus of (95.1±3.3)%, as well as excellent sludge settleability with average sludge volume index of (83.7±9.5) L·mg-1 in the modified UCT process. Moreover, (61.5±6.0)% of influent COD was efficiently involved in denitrification or phosphorus release process. As much as 35.3% of TN was eliminated through simultaneous nitrification and denitrification process in aerobic zones. In addition, the presence of denitrifying phosphorus accumulating organisms (DNPAOs), account- ing for approximately 39.2% of PAOs, was also greatly beneficial to the nitrogen Consequently, the modified and phosphorus removal. UCT step feed process was more attractive for the wastewater treatment plant, because it had extremely competitive advantages such as higher nutrient removal efficiencies, lower energy and dosages consumption, excellent settling sludge and operational assurance.Shijian GE Yongzhen PENG Congcong LU Shuying WANG 2013Frontiers of Environmental Science & Engineering2013,7,1:4
17Coordinated Modulation Strategy Considering Multi-HVDC Emergency for Enhancing Transient Stability of Hybrid AC/DC Power Systems显示文摘This paper presents a multi-HVDC emergency coordinated modulating strategy to enhance the transient stability of hybrid AC/DC power systems.First,the main factors that affect the unbalanced energy distribution during a fault are analyzed,and the dominant generators are determined online.Next,considering the influence on both generators in the sending and receiving ends,the assessment index that evaluates the effects of DC power support is established.On the basis of this,a dynamic DC power support strategy is put forward,and the DC support sequence table is promptly updated by the changing dominant generators.The AC/DC hybrid power system with multi-DC lines is built and used as a test system.The simulation results of different scenarios demonstrate that the proposed method could follow the dominant generator dynamically and adjust the DC participating in modulation to enhance the transient stability effectively and quickly.Tong Wang Congcong Li Dengkai Mi Zengping Wang Yuwei Xiang 2020CSEE Journal of Power and Energy Systems2020,6,4:4
18α-secretase ADAM IO physically interacts with β-secretase BACE1 in neurons and regulates CHL1 proteolysis显示文摘Xin Wang Congcong Wang Gang Pei 2018Journal of Molecular Cell Biology2018,10,5:3
19羟基磷灰石负载金催化丙酮醇与甲醇氧化酯化合成丙酮酸甲酯:酸碱性质的基本作用(英文)显示文摘丙酮醇是一种可由木质纤维素类生物质经分步或快速热裂解获得的主要轻质含氧化合物.本文报道了金基催化剂上,丙酮醇可经氧化酯化反应被选择性转化为重要的精细化学品--丙酮酸甲酯.研究结果表明具有适宜强度和比例酸碱位点的两性载体负载金催化剂能够促进氧化酯化反应进行,同时不加快羟醛缩合缩合和Cannizzaro反应等副反应进行.其中,羟基磷灰石(钙磷比为1.62)负载金催化剂上,丙酮醇转化率为62%,丙酮酸甲酯选择性可达87%.Yan Wan Congcong Zheng Xianchi Lei Mengqi Zhuang Jinhan Lin Wenda Hu Jing dongLin Shaolong Wan Yong Wang 2019Chinese Journal of Catalysis2019,40,11:3
20Effects of nano-silicon and common silicon on lead uptake and translocation in two rice cultivars显示文摘当前的学习在在在包含二不同 Pb 的土壤种的大米栽培变种 Yangdao 6 和 Yu 44 的毒性,举起, translocation,和累积铺平的铅(Pb ) 上调查了 nano 硅(Si ) 和普通 Si 的效果(500 mgkg 1 和 1000 mgkg 1) 。结果证明 Si 申请在米饭生长上减轻了 Pb 的有毒的效果。分别地,比没有 Si 供应(控制) 的植物的那些更高在植物的 biomasses 与普通 Si 和 nano-Si 供应了的 500 和 1000 mgkg 1, 的土壤 Pb 处理下面是 1.8%5.2% 和 3.3%11.8% 。比作控制,在与普通 Si 和 nano-Si 供应的米饭射击的 Pb 集中被 14.3%31.4% 和 27.6%54.0% 分别地减少。在与普通 Si 和 nano-Si 对待的米饭谷物的 Pb 集中分别地由 21.3%40.9% 和 38.6%64.8% 减少了。到射击的从根的 Pb translocation 因素(TF ) 分别地由 15.0%29.3% 和 25.6%50.8% 减少了。分别地,到谷物的从射击的 TF 在 Si 申请以后由 8.3%13.7% 和 15.3%21.1% 减少了。在植物上观察的效果的大小在下列顺序减少了:nano-Si 处理 > 普通 Si 处理和 high-grain-积累 Pb 栽培变种(Yangdao 6 )> low-grain-Pbaccumulating 栽培变种(Yu 44 ) 和重 Pb 应力(1000 mgkg 1)> 中等 Pb 应力(500 mgkg 1)> 没有 Pb 处理。学习的结果显示 nano-Si 是比在改善的普通 Si 更有效的米饭生长上的 Pb 的有毒的效果,阻止 Pb 转移米饭根到未葬部分,和在米饭谷物,特别在 high-Pbaccumulating 米饭栽培变种并且在重重地弄脏 Pb 的土壤的堵住的 Pb 累积。Jianguo LIU Hui CAI Congcong MEI Mingxin WANG 2015Frontiers of Environmental Science & Engineering2015,9,5:3
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