检索结果-南通市图书馆

Assessing effects of land use and land cover changes on hydrological processes and sediment yield in the Xunwu River watershed, Jiangxi Province, China

引用

Frontiers of Earth Science 2022年第3期16卷 819-833页

作者： Guihua LIU Britta SCHMALZ Qi zhang Shuhua QI Lichao Zhang Shiyu LIU School of Geography and Environment Key Laboratory of Poyang Lake Wetland and Watershed Research(Ministry of Education)Jiangxi Normal UniversityNanchang 330022China Department of Civil and Environmental Engineering Key Laboratory of Engineering Hydrology and Water ManagementTechnical University of DarmstadtDarmstadt 64287Germany Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China College of Land Resources and Environment Jiangxi Agricultural UniversityNanchang 330045China Jiangxi Key Laboratory of Soil Erosion and Prevention Jiangxi Institute of Soil and Water ConservationNanchang 330029China

The effects of land use and land cover changes on hydrological processes and sediment yield are important issues in regional hydrology.The Xunwu River catchment located in the red soil hilly region of southern China has experienced drastic land use changes in the past 30 years,with orchard increases of approximately 42%and forest decreases of approximately 40%.These changes have resulted in some alterations of runoff and sediment yield.This study aims to evaluate effects of land use/land cover on runoff and sediment yield in the Xunwu River catchment.The SWAT model(Soil and Water Assessment Tool)was used for runoff and sediment simulation,and the results met the requirements of the model acceptance based on evaluation statistics of R^(2)(the coefficient of determination),PBIAS(percent bias),and NSE(Nash-Sutcliffe efficiency).Four land use scenarios representing the gradual expansion of orchards in the past 26 years were developed for assessment of hydrological processes and sediment yield simulation.As a result,both runoff and sediment yield were changed insignificantly with decrease rates of 1.84%and 5.29%,respectively.In addition,surface runoff accounts for the largest share of the runoff components,but the lateral flow changed more than other runoff components with a decrease rate of 10.96%.The results show that orchard expansion does not reveal severe water and soil loss.This study can contribute to the rational utilization of land and water resources in the red soil hilly area of southern Jiangxi Province.

关键词： land use change orchard expansion red soil hilly region SWAT runoff sediment

来源：

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

GSK3 regulates VRN1 to control flowering time in wheat

引用

Journal of Integrative Plant Biology 2023年第7期65卷 1605-1608页

作者： Guoqing Cui Danping Li Lichao Zhang Chuan Xia Xiuying Kong Xu Liu State Key Laboratory of Crop Gene Resources and Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

The precise control of flowering time is important for the regional adaptability and productivity of many crops.Various categories of genes related to flowering have been isolated and characterized functionally in wheat(Triticum aestivum) in response to vernalization to adjust flowering initiation. Before vernalization, the inhibitory histone modification H3K27me3 is enriched in the promoter and the first intron of the vernalization gene VRN1.

关键词： aestivum precise flowering

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Identification and classification of promoters using the attention mechanism based on long short-term memory

引用

Frontiers of Computer Science 2022年第4期16卷 103-109页

作者： Qingwen Li Lichao Zhang Lei Xu Quan Zou Jin Wu Qingyuan Li Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu610054China State Key Laboratory of Brain and Cognitive Science Institute of BiophysicsChinese Academy of SciencesBeijing100101China Forestry and Fruit Tree Research Institute Wuhan Academy of Agricultural SciencesWuhan430075China School of Intelligent Manufacturing and Equipment Shenzhen Institute of Information TechnologyShenzhen518172China School of Electronic and Communication Engineering Shenzhen PolytechnicShenzhen518055China School of Management Shenzhen PolytechnicShenzhen518055China

A promoter is a short region of DNA that can bind RNA polymerase and initiate gene transcription.It is usually located directly upstream of the transcription initiation site.DNA promoters have been proven to be the main cause of many human diseases,especially diabetes,cancer or Huntington’s disease.Therefore,the classification of promoters has become an interesting problem and has attracted the attention of many researchers in the field of bioinformatics.Various studies have been conducted in order to solve this problem,but their performance still needs further improvement.In this research,we segmented the DNA sequence in a k-mers manner,then trained the word vector model,inputted it into long short-term memory(LSTM)and used the attention mechanism to predict.Our method can achieve 93.45%and 90.59%cross-validation accuracy in the two layers,respectively.Our results are better than others based on the same data set,and provided some ideas for accurately predicting promoters.In addition,this research suggested that natural language processing can play a significant role in biological sequence prediction.

关键词： promoter bioinformatics natural language processing attention mechanism

来源：

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

ERCP combined with colonoscopy in the treatment of biliary-colonic fistula:case report and literature review

引用

Gastroenterology Report 2023年第1期11卷 533-535页

作者： Hongfei He Tingting Yu Yaoting Li Senlin Hou Lichao Zhang Biliopancreatic Endoscopic Surgery Department The Second Hospital of Hebei Medical UniversityShijiazhuangHebeiP.R.China

Introduction Internal biliary fistula is a potentially serious complication of laparoscopic cholecystectomy[1].Biliary-colonic fistula is a rare type of internal biliary fistula.Formation of a biliary-colonic fistula can occur as the result of surgical injury,stone obstruction,and biliary hypertension.More infrequent causes include intestinal ulcer and malignant tumor.The formation of a fistula also has the effect of infection and inflammation.While very few cases of biliary-colonic fistulas have been reported,these cases typically present with the aforementioned clinical presentations[2,3].In the present case,a biliary-colonic fistula resulting from bile-duct injury after laparoscopic cholecystectomy was identified by endoscopic retrograde cholangiopancreatography(ERCP).We innovatively adopted ERCP combined with colonoscopy to clamp the sinus tract for the patient.

关键词： fistula biliary colonic

来源：

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

Novel per-oral cholangioscopy for treatment of occult accessory hepatic duct stones

引用

Gastroenterology Report 2023年第1期11卷 574-575页

作者： Tingting Yu Yaoting Li Hongfei He Senlin Hou Lichao Zhang Department of Biliopancreatic Endoscopic Surgery The Second Hospital of Hebei Medical UniversityShijiazhuangHebeiP.R.China

Introduction The accessory hepatic duct is a variation of the biliary tree and is considered to be an important factor contributing to bile duct injury during surgery[1].Accessory hepatic duct stones are a rare form of cholelithiasis.The angle at which the accessory hepatic duct opens into the common bile duct makes it difficult to remove stones using conventional endoscopic retrograde cholangiopancreatography(ERCP).We reported a rare and insidious case of an accessory hepatic duct stone.The patient’s abdominal computed tomography(CT)did not reveal any abnormalities,but endoscopic ultrasound revealed a stone in the bile duct opening into a branch of the common bile duct.The patient underwent ERCP,and cholangiography showed no abnormalities.However,the accessory hepatic duct opening was found in the common bile duct and the accessory hepatic duct stones were successfully removed using the EyeMax Choledochoscope System Digital Controller(Nanjing,China).

关键词： hepatic stones surgery

来源：

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

Enantioselective synthesis of tetrasubstituted allenes via addition/arylation tandem reaction of 2-activated 1,3-enynes

引用

Science China Chemistry 2023年第2期66卷 526-533页

作者： Yongyan zhang Jin Wu lichao Ning Qianping Chen Xiaoming Feng Xiaohua Liu Key Laboratory of Green Chemistry&Technology Ministry of EducationCollege of ChemistrySichuan UniversityChengdu610064China

We report the development of a new class of multifunctional chiral guanidine/Pd(0)catalyst system for 1,4-addition/arylation tandem reaction.A variety of tetra-substituted allenes were readily accessible from three-component“one-pot”transformations of acyclic or cyclic 2-activated 1,3-enynes,malonates and halobenzenes under mild reaction conditions.High levels of yield and enantioselectivity were achieved in the construction of stereogenic center and axis using readily available acyclic guanidineamides.The mechanistic studies suggest that the guanidine/Pd(0)collaboration has obvious synergism to both base-dominated conjugate addition,and Pd(0)-dominated Heck-type reaction.

关键词： chiral guanidine tandem reaction three-component“one-pot” synergistic catalysis tetra-substituted allenes

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Analysis of the relationship between bile duct and duodenal microbiota reveals that potential dysbacteriosis is the main cause of primary common bile duct stones

引用

Synthetic and Systems Biotechnology 2021年第4期6卷 414-428页

作者： Zhitang Lyu Tingting Yu Lichao Zhang Xiaona Xu Yijun zhang Jihong Li Zhirong Li Wei zhang Senlin Hou School of Life Sciences Institute of Life Science and Green DevelopmentHebei UniversityBaodingPR China The Second Hospital of Hebei Medical University ShijiazhuangPR China Key Laboratory of Microbial Diversity Research and Application of Hebei Province BaodingPR China Engineering Laboratory of Microbial Breeding and Preservation of Hebei Province BaodingPR China

Bacteria play an important role in the formation of primary Common Bile Duct(CBD)stones.However,the composition and function of the microbiota of bile duct in patients with primary CBD stones remained to be explored.We utilized the 16S rRNA gene high-throughput sequencing technology to analyze the microbial diversity and community composition of biliary and duodenal microbiota in 15 patients with primary CBD stones and 4 patients without biliary tract diseases.Alpha diversity analysis showed that the microbiota richness was similar in bile and intestinal fluid;Beta diversity analysis showed that there were differences in the composition between biliary microbiota and the duodenal microbiota,but the abundance of the main groups showed similarities.The composition of the biliary microbiota from gallstone patients was more complex,as was the duodenal microbiota.Proteobacteria and Firmicutes were the dominant bacteria at phylum level,accounting for at least 75%of the total reads in each subgroup.Pseudomonas and Escherichia􀀀Shigella were the major genus among subgroups,but Escherichia-Shigella had increased abundance in duodenal microbiota with primary choledocholithiasis,which may play an important role in stone formation.It is noteworthy that Clostridiumsensu_stricto,Lachnospiraceae_UCG-008,Butyrivibrio and Roseburia which could produce short chain fatty acids(SCFAs),were significantly decreased in biliary microbiota with primary CBD stones(p<0.05).Our study provided new insights into the compositional of normal biliary microbiota.The micro-ecology of biliary and duodenal in patients with stones is complex and closely related,and there is a potential for dysbacteriosis.The decrease in abundance of certain major acid-producing bacteria affects the health of the biliary tract and thus leads to the formation of stones.

关键词： Primary common bile duct stones ERCP Dysbacteriosis Bile duct microbiota Duodenal microbiota 16S rRNA gene high-throughput sequencing Short chain fatty acids

来源：

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

Mitochondrial dysfunction: A promising therapeutic target for liver diseases

引用

Genes & Diseases 2024年第3期11卷 324-337页

作者： Ping Chen lichao Yao Mengqin Yuan Zheng Wang Qiuling zhang Yingan Jiang Lanjuan Li Department of Infectious Diseases Renmin Hospital of Wuhan UniversityWuhanHubei 430060China State Key Laboratory for Diagnosis and Treatment of Infectious Diseases National Clinical Research Center for Infectious DiseasesCollaborative Innovation Center for Diagnosis and Treatment of Infectious DiseasesThe First Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhouZhejiang 310003China

The liver is an important metabolic and detoxification organ and hence demands a large amount of energy,which is mainly produced by the mitochondria.Liver tissues of pa-tients with alcohol-related or non-alcohol-related liver diseases contain ultrastructural mito-chondrial lesions,mitochondrial DNA damage,disturbed mitochondrial dynamics,and compromised ATP production.Overproduction of mitochondrial reactive oxygen species in-duces oxidative damage to mitochondrial proteins and mitochondrial DNA,decreases mito-chondrial membrane potential,triggers hepatocyte inflammation,and promotes programmed cell death,all of which impair liver function.Mitochondrial DNA may be a poten-tial novel non-invasive biomarker of the risk of progression to liver cirrhosis and hepatocellular carcinoma in patients infected with the hepatitis B virus.We herein present a review of the mechanisms of mitochondrial dysfunction in the development of acute liver injury and chronic liver diseases,such as hepatocellular carcinoma,viral hepatitis,drug-induced liver injury,alcoholic liver disease,and non-alcoholic fatty liver disease.This review also discusses mito-chondrion-centric therapies for treating liver diseases.

关键词： Chronic diseases Liverdamage Mesenchymalstem cell Mitochondrial dysfunction Oxidativestress

来源：

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

The HY5 transcription factor negatively regulates ethylene production by inhibiting ACS1 expression under blue light conditions in pear

引用

Horticultural Plant Journal 2023年第5期9卷 920-930页

作者： Weiting Liu Lichao Zhang Li Ma Hui Yuan Aide Wang Key Laboratory of Fruit Postharvest Biology Key Laboratory of Protected HorticultureNational&Local Joint Engineering Research Center of Northern Horticultural Facilities Design&Application TechnologyCollege of HorticultureShenyang Agricultural UniversityShenyangLiaoning 110866China Department of Foreign Language Teaching Shenyang Agricultural UniversityShenyangLiaoning 110866China

Ethylene is the main factor controlling fruit ripening of pear(Pyrus ussuriensis).Ethylene production rate is negatively correlated with fruit shelf life;therefore,it is important to decrease the ethylene levels for optimal fruit storage.Here,we observed that blue light treatment could inhibit ethylene production and promote the expression of ELONGATED HYPOCOTYL 5(PuHY5),a basic leucine zipper domain(bZIP)transcription factor.The following studies showed that PuHY5 could bind to the promoter of ACC synthase 1(PuACS1),a rate-limiting enzyme in ethylene biosynthesis,and inhibit its expression.For pears in which Pu HY5 was silenced,the ethylene production and PuACS1 expression were much higher than those in the control fruit.These results demonstrated that blue light inhibited ethylene production through the induction of Pu HY5 in pear.Our finding provides a new method for prolonging fruit shelf life.

关键词： Pear Pyrus ussuriensis Fruit ripening Blue light Ethylene synthesis PuHY5 PuACS1

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Wheat male-sterile 2 reduces ROS levels to inhibit anther development by deactivating ROS modulator 1

引用

Molecular Plant 2022年第9期15卷 1428-1439页

作者： Jie Liu Chuan Xia Huixue Dong Pan Liu Ruizhen Yang Lichao Zhang Xu Liu Jizeng Jia Xiuying Kong Jiaqiang Sun National Key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization(MOE)and Beijing Key Laboratory of Crop Genetic Improvement China Agricultural UniversityBeijing 100193China

Ms2 is an important dominant male-sterile gene in wheat,but the biochemical function of Ms2 and the mechanism by which it causes male sterility remain elusive.Here,we report the molecular basis underlying Ms2-induced male sterility in wheat.We found that activated Ms2 specifically reduces the reactive oxygen species(ROS)signals in anthers and thereby induces termination of wheat anther development at an early stage.Furthermore,our results indicate that Ms2 is localized in mitochondria,where it physically interacts with a wheat homolog of ROS modulator 1(TaRomo1).Romo1 positively regulates the ROS levels in humans but has never been studied in plants.We found that single amino acid substitutions in the Ms2 protein that rescue the ms2 male-sterile phenotype abolish the interaction between Ms2 and TaRomo1.Significantly,Ms2 promotes the transition of TaRomo1 proteins from active monomers to inactive oligomers.Taken together,our findings unravel the molecular basis of Ms2-induced male sterility and reveal a regulatory mechanism in which ROS act as essential signals guiding the anther development program in wheat.

关键词： wheat Ms2 male sterility ROS Romo1

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：