检索结果-南通市图书馆

A CRACK CLOSURE MODEL FOR BRITTLE ROCK SUBJECTED TO COMPRESSIVE-SHEAR LOADING

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1999年第2期9卷 223-228页

作者： Chen, F Sun, ZQ xu, jc Cent S Univ Technol Opening Lab Mech Changsha 410083 Peoples R China

１ＩＮＴＲＯＤＵＣＴＩＯＮＣｏｍｐｒｅｓｓｉｏｎｓｈｅａｒｆｒａｃｔｕｒｅｏｆｒｏｃｋｗａｓｉｎｖｅｓｔｉｇａｔｅｄｂｙｍａｎｙｒｅｓｅａｒｃｈｅｒｓ，Ｒａｏｅｔａｌ［１］ｓｔｕｄｉｅｄｔｈｉｓｆａｉｌｕｒｅｍｏ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＣｏｍｐｒｅｓｓｉｏｎｓｈｅａｒｆｒａｃｔｕｒｅｏｆｒｏｃｋｗａｓｉｎｖｅｓｔｉｇａｔｅｄｂｙｍａｎｙｒｅｓｅａｒｃｈｅｒｓ，Ｒａｏｅｔａｌ［１］ｓｔｕｄｉｅｄｔｈｉｓｆａｉｌｕｒｅｍｏｄｅｕｓｉｎｇｆｏｕｒｐｏｉｎｔｂ...

关键词： crack closurecompressiveshear loadingstress intensity factor

Synthesis of F-alkylated MDP Analogs

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1996年第11期7卷 993-994页

作者： Zhang, MZ xu, jc GUANGXI NORMAL UNIV DEPT CHEMGUILIN 541004GUANGXIPEOPLES R CHINA ACAD SINICA SHANGHAI INST ORGAN CHEMSHANGHAI 200032PEOPLES R CHINA

Four F-alkylated muramyl dipeptides were synthesized by an efficient coupling reagent, Benzotriazol-1-yloxy-bis(pyrrolidino)carbo hexafluoro-phosphate(BBC)([1]).

关键词： MDP Synthesis of F-alkylated MDP Analogs

New host and geographic records of five pleosporalean hyphomycetes associated with Musa spp.(Banana)

在线全文

学校读者我要写书评

暂无评论

Studies in Fungi 2021年第1期6卷 92-115页

作者： Samarakoon BC Phookamsak R Karunarathna SC Jeewon R Chomnunti P xu jc Li YJ The State Phosphorus Resource Development and Utilization Engineering Technology Research Centre Yunnan Phosphate Chemical Group Co.LtdKunming 650201China Center of Excellence in Fungal Research Mae Fah Luang UniversityChiang Rai 57100Thailand School of Science Mae Fah Luang UniversityChiang Rai 57100Thailand CAS Key Laboratory for Plant Biodiversity and Biogeography of East Asia(KLPB) Kunming Institute of BotanyChinese Academy of SciencesKunming 650201YunnanChina East and Central Asia Regional Office World Agroforestry Centre(ICRAF)Kunming 650201YunnanChina Centre for Mountain Futures(CMF) Kunming Institute of BotanyKunming 650201YunnanChina Honghe Center for Mountain Futures Kunming Institute of BotanyChinese Academy of SciencesHonghe County 654400YunnanPeople’s Republic of China Department of Health Sciences Faculty of Medicine and Health SciencesUniversity of MauritiusReduitMauritius Research Center of Microbial Diversity and Sustainable Utilization Faculty of SciencesChiang Mai UniversityChiang Mai 50200Thailand

A study was undertaken to collect and identify saprobic fungi associated with Musa spp.(banana)from Taiwan(China),and *** were collected during the dry season and their morpho-molecular relationships were *** brown pleosporalean hyphomycetous taxa in Periconiaceae and Torulaceae *** cortaderiae,***,Torula chromolaenae,***,and *** were identified for the first time from Musa spp.(Musaceae).Phylogenetic analyses of a combined SSU,LSU,ITS,RPB2 and TEF DNA sequence dataset further justified the taxonomic placements of these five taxa in the above mentioned *** delonicis is reported for the first time on a monocotyledonous host and *** is the first geographical record from Taiwan(China).

关键词： Dothideomycetes Periconia Pleosporales taxonomy Torula

Polyurethane-degrading fungi from soils contaminated with rocket propellant and their ability to decompose alkyne terminated polybutadiene with urethane

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

Studies in Fungi 2021年第1期6卷 224-239页

作者： Ren GC Pang AM Gao Y Wu SX Ge ZQ Zhang TF Wanasinghe DN Khan S Mortimer PE xu jc Gui H Center of Excellence in Fungal Research Mae Fah Luang UniversityChiang Rai 57100Thailand Guiyang Nursing Vocational College Guiyang 550081GuizhouChina Honghe Center for Mountain Futures Kunming Institute of BotanyChinese Academy of SciencesHonghe County 654400YunnanChina School of Science Mae Fah Luang UniversityChiang Rai 57100Thailand Science and Technology on Aerospace Chemical Power Laboratory Hubei Institute of Aerospace ChemotechnologyXiangyang441003HubeiChina

A large amount of propellant materials are produced every year,and storage and disposal of these propellant materials seriously contributes to environmental *** terminated polybutadiene with urethane segments(PUPB)is the macromolecule backbone of these propellant materials,and degradation of PUPB is central to the eco-friendly treatment of propellant *** this study,we isolated a polyurethane(PU)-and PUPB-degrading fungus from soils contaminated with rocket propellant,and the fungus H14 was identified as Fusarium solani(Mart.)*** on macro-and micro-morphology as well as phylogenetic *** ability of *** H14 to degrade PU film and PUPB patches was evaluated via mass loss,scanning electron microscopy(SEM)and enzyme production *** loss analyses revealed a 25.8%reduction in mass of PU and 1.3%reduction in mass of PUPB after *** H14 was incubated with PU and PUPB for 90 days,*** found that *** H14 mycelia significantly colonized both PU and *** images showed that the surface of PU films and PUPB patches formed holes,underwent folding and experienced damage as well as irregular fissuring from the erosion of fungal ***,two possible degradative enzymes,lipase and esterase,were produced by *** study opens a new avenue of research for eco-friendly treatments of explosive materials and *** paper represents the first article on the degradation of PUPB patches.

关键词： enzyme Fusarium solani mass loss PU PUPB

Riverine sulfate sources and behaviors in arid environment,Northwest China:Constraints from sulfur and oxygen isotopes

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 Environmental Sciences 2024年第3期137卷 716-731页

作者： Yifu xu Wenjing Liu Bing xu Zhifang xu Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China

The fate of riverine sulfate ion (SO_(4)^(2-)) and its environmental effects in arid environment are difficult to evaluate due to its complicated sources and strongly coupled behaviors with water cycle which is significantly modified by *** understand the sulfur cycle in aquatic systems in arid environment,the chemical and sulfur and oxygen isotopic compositions (δ^(34)S_(SO4)and δ^(18)O_(SO4)) of major rivers around the Badain Jaran Desert,northwestern China,were *** rivers had averaged SO_(4)^(2-)content at 1336μmol/L,over 10times higher than the global *** δ^(34)S_(SO4)and δ^(18)O_(SO4)values ranged from-5.3‰to+11.8‰and+1.6‰to+12.8‰,*** end-member analysis and the inverse model showed that riverine sulfate was mainly derived from evaporites dissolution (0-87%),sulfide oxidation (13%-100%) and precipitation (0-33%),indicating heterogeneity in sulfur sources and behaviors along the river drainage with the lithology variations and climate *** isotopic tools combining with hydro-chemistry compositions could be applied to reveal sulfur cycle in arid *** on the calculation,sulfide oxidation plays the primary role in the headwater and upstream in the Qilian-Mountains area,where sulfide is widely *** the proportion of evaporites dissolution contributing to riverine sulfate is much higher in downstream in a drier ***,less precipitation and higher temperature can lead to more intensive evaporation,affecting the process of sulfide oxidation and enhancing the rates of evaporites dissolution and sulfate precipitation in the basin.

关键词： Sulfur and oxygen isotopes Source apportionment Inverse model Arid environment Inland rivers Northwestern China

Laboratory evaluation of high-friction thin overlays for pavement preservation

在线全文

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2024年第6期18卷 936-948页

作者： Ouming xu Rentao xu Lintong JIN School of Highway Chang’an UniversityXi’an 710064China School of Materials Science and Engineering Chang’an UniversityXi’an 710061China

Traditional asphalt concrete(AC)and stone matrix asphalt(SMA),which are used as thin asphalt overlays,are common maintenance strategies to enhancing ride quality,skid resistance,and ***,several studies have used a novel asphalt mixture known as a high-friction thin overlay(HFTO)to improve surface ***,it remains uncertain whether the laboratory properties of HFTO differ significantly from those of conventional *** study aims to evaluate the laboratory properties of HFTO mixtures and compare them with those of AC and *** mixtures with nominal maximum size of 9.5 mm were produced in the laboratory,and performance tests were conducted,including wheel tracking test,low temperature flexural creep test,moisture susceptibility test,Cantabro Abrasion Test,Marshall Test,sand patch test,British pendulum test,and indoor tire-rollingdown *** results showed that the HFTO exhibited a lower tire/pavement noise than the AC and ***,HFTO had superior high-temperature stability,larger macro texture,and higher skid resistance in comparison to those of AC,but lower than those of ***,HFTO mixtures may be considered a suitable replacement for traditional AC mixtures in regions where skid resistance and noise reduction are concerns.

关键词： road engineering pavement maintenance high friction thin overlay performance skid resistance tire/pavement noise

Aldehyde oxidase mediated enantioselective metabolic health risk of dinotefuran

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

Science China Chemistry 2024年第6期67卷 2079-2091页

作者： Liwei xu Xinxin xu Hua Kuang Chuanlai xu Xiaoling Wu State Key Laboratory of Food Science and Resources Jiangnan UniversityWuxi214122China International Joint Research Laboratory for Biointerface and Biodetection and School of Food Science and Technology Jiangnan UniversityWuxi214122China Collaborative Innovation center of Food Safety and Quality Control in Jiangsu Province Jiangnan UniversityWuxi214122China

Chiral pollutants often pose significant differential environmental health *** this study,the biotransformation of chiral dinotefuran(DIN)and its enantioselective metabolic toxicity mechanisms have been systemically ***,reversedphase chromatography-high resolution mass spectrometry was developed to quantify the content of DIN R/S chiral enantiomer with pg level sensitivity,revealing a lower elimination rate constant(K_(e))of S-DIN(0.730 h^(-1))than R-DIN(0.746 h^(-1)).Secondly,the interaction mechanism between DIN metabolism and important endogenous bioactive molecules,such as aldehyde oxidase(AOX)and neurotransmitters,was *** DIN nitro-group was converted into a guanidine group by the reducing site of nearby flavin adenine dinucleotide(FAD)in AOX with the preferred higher affinity of ***,the endogenous tryptophan(Trp)aldehyde metabolic intermediate,5-hydroxyindoleacetaldehyde(5-HIAL),provides a persistent electron donor for DIN reduction via the oxidation-catalyzed site in AOX,resulting in remarkable up-regulation of monoamine neurotransmitters such as serotonin and ***,the higher level of neurotransmitters further mediated dysregulation of oxylipin homeostasis via the serotonergic pathway,where S-DIN exhibited more pronounced liver lipid damage and environmental health risk with the accumulated lipid biomarkers,oxidized triglyceride(OxTG)and oxidized sphingomyelin(OxSM).This study elucidates the AOX-mediated enantioselectivity metabolic pathway of DIN,providing a new analytical method for chiral pollutants and paves the way for their health risk assessments.

关键词： neonicotinoid dinotefuran enantiomer aldehyde oxidase metabolomics health risk

Granting strength to aerogel fibers through encapsulation

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2024年第4期67卷 1365-1366页

作者： Wenhui xu Department of Basic Chemistry School of PharmacyJiangxi University of Chinese MedicineNanchang 330004China

Aerogel fibers, distinguished by their lightweight nature, pronounced porosity, large surface area, and superior thermal insulation properties, have diversified applications in thermal management, energy devices, and environmental remediation[1]. However, compared with monolithic ones, these fibershaped aerogels exhibit limited mechanical strength and resilience due to their one-dimensional small size.

关键词： strength fibers thermal

Skeletal interoception in osteoarthritis

在线全文

学校读者我要写书评

暂无评论

Bone Research 2024年第2期12卷 241-254页

作者： Dinglong Yang Jiawen xu Ke xu Peng xu Department of Joint Surgery Honghui HospitalXi’an Jiaotong UniversityXi’an 710054China Department of Orthopedic Surgery and Orthopedic Research Institute West China HospitalSichuan UniversityChengdu 610041China

The interoception maintains proper physiological conditions and metabolic homeostasis by releasing regulatory signals after perceving changes in the internal state of the *** its various forms,skeletal interoception specifically regulates the metabolic homeostasis of ***(OA)is a complex joint disorder involving cartilage,subchondral bone,and *** subchondral bone undergoes continuous remodeling to adapt to dynamic joint *** findings highlight that skeletal interoception mediated by aberrant mechanical loads contributes to pathological remodeling of the subchondral bone,resulting in subchondral bone sclerosis in *** skeletal interoception is also a potential mechanism for chronic synovial inflammation in *** this review,we offer a general overview of interoception,specifically skeletal interoception,subchondral bone microenviroment and the aberrant subchondral *** also discuss the role of skeletal interoception in abnormal subchondral bone remodeling and synovial inflammation in OA,as well as the potential prospects and challenges in exploring novel OA therapies that target skeletal interoception.

关键词： homeostasis inflammation releasing