检索结果-南通市图书馆

Genetics of biochemical attributes regulating morpho-physiology of upland cotton under high temperature conditions

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 Cotton Research 2024年第1期7卷 29-44页

作者： MAJEED Sajid CHAUDHARY Muhammad Tanees MUBARIK Muhammad Salman RANA Iqrar Ahmad SHABAN Muhammad TAN Daniel KY JIA Yinhua DU Xiongming HINZE lori AZHAR Muhammad Tehseen Federal Seed Certification and Registration Department Ministry of National Food Security and ResearchIslamabad 44090Pakistan Horticultural Research Institute National Agricultural Research CentreIslamabad 44000Pakistan Department of Biotechnology University of NarowalNarowal 51600Pakistan Centre of Agricultural Biochemistry and Biotechnology University of AgricultureFaisalabad 38400Pakistan Department of Plant Breeding and Genetics University of Agriculture FaisalabadSub-Campus BurewalaVehariPakistan Faculty of Science School of Life and Environ-mental SciencesPlant Breeding InstituteSydney Institute of AgricultureThe University of SydneySydneyNSW 2006Australia State Key Laboratory of Cotton Biology Institute of Cotton Research of Chinese Academy of Agri-cultural ScienceAnyang 455000China Agricultural Research Service USDASouthern Plains Agricultural Research CentreCollege StationTX 77845USA Department of Plant Breeding and Genetics University of AgricultureFaisal-abad 38400Pakistan School of Agriculture Sciences Zhengzhou UniversityZhengzhou 450000China.

Background Cotton is a strategically important fibre crop for global textile *** profoundly impacts several countries’industrial and agricultural *** cotton production is continuously threatened by the unpre-dictable changes in climate,specifically high *** heat-tolerant,high-yielding cotton cultivars with wide adaptability to be grown in the regions with rising temperatures is one of the primary objectives of modern cotton breeding ***,the main objective of the current study is to figure out the effective breed-ing approach to imparting heat tolerance as well as the judicious utilization of commercially significant and stress-tolerant attributes in cotton ***,the two most notable heat-susceptible(FH-115 and NIAB Kiran)and tolerant(IUB-13 and GH-Mubarak)cotton cultivars were spotted to develop filial and backcross populations to accom-plish the preceding study *** heat tolerant cultivars were screened on the basis of various morphological(seed cotton yield per plant,ginning turnout percentage),physiological(pollen viability,cell membrane thermostabil-ity)and biochemical(peroxidase activity,proline content,hydrogen peroxide content)*** The results clearly exhibited that heat stress consequently had a detrimental impact on every studied plant trait,as revealed by the ability of crossing and their backcross populations to tolerate high ***,when considering overall yield,biochemical,and physiological traits,the IUB-13×FH-115 cross went over particularly well at both normal and high temperature ***,overall seed cotton yield per plant exhibited a posi-tive correlation with both pollen viability and antioxidant levels(POD activity and proline content).Conclusions Selection from segregation population and criteria involving pollen viability and antioxidant levels concluded to be an effective strategy for the screening of heat-tolerant cotton g

关键词： Accessions Biochemical Breeding Cotton Generation mean analysis Heat stress

在线全文

学校读者我要写书评

暂无评论

冰与火冰岛展示了大自然的力量

空中英语教室（高级版．彭蒙惠英语） 2024年第7期 10-12,40页

作者： lori Swanson 不详

冰岛是个小国,大部分人口都居住在雷克雅未克镇。雷克雅未克以外那些令人震撼的景色主要由壮硕的冰岛马、火山、不时喷发的间歇泉、温泉以及熔岩原构成。地震在冰岛相当常见,而我们造访期间虽然发生了几次地震——其中一次的里氏震级超... 详细信息

冰岛是个小国,大部分人口都居住在雷克雅未克镇。雷克雅未克以外那些令人震撼的景色主要由壮硕的冰岛马、火山、不时喷发的间歇泉、温泉以及熔岩原构成。地震在冰岛相当常见,而我们造访期间虽然发生了几次地震——其中一次的里氏震级超过3级——但我们都没有感觉到。

关键词：里氏震级雷克雅未克间歇泉温泉冰岛地震火山大自然

Synthesizing and characterizing the magnetic EDTA/chitosan/CeZnO nanocomposite for simultaneous treating of chromium and phenol in an aqueous solution

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2023年第6期58卷 76-88页

作者： Masoumeh Sheikh Hosseini lori Mohammad Delnavaz Hoda Khoshvaght Faculty of Engineering Civil Engineering DepartmentKharazmi UniversityTehran 15719-14911Iran

A new magnetic nanocomposite chitosan/EDTA/CeZnO(MEC-CeZnO)is synthesized as an efficient and eco-friendly bio-compound for the removal of chromium Cr(VI)metal ions and phenol organic matters from aqueous *** are characterized using field emission scanning electron microscope,energy dispersive X-ray spectroscopy,transmission electron microscope,X-ray diffraction,X-ray photoelectron spectroscopy,Fourier transform infrared spectroscopy,diffuse reflection spectroscopy,and PL *** reduction rate of Cr(VI)ions and phenol degradation is evaluated under various experimental conditions,separately and *** average pore diameter and specific surface of MEC-CeZnO nanocomposite are obtained 50 nm and 210 m^(2)·g^(-1)respectively,which suggest the successful synthesis of the nanocomposite because of the increased surface area and reduced pores in comparison to previous ***,the best Cr(VI)and phenol reduction efficiencies are 98%and 92%at 180 min of retention time,both following the Langmuir-Hinshelwood first-order *** mechanisms of Cr(VI)and phenol removal from aqueous solutions involved Cr(VI)reduction,phenol oxidation,and *** the reusability of MEC-CeZnO showed that both degradation and recovery capacity is stable in 5 cycles.

关键词： Magnetic chitosan Chromium Phenol Photochemistry Nanoparticles Experimental validation

在线全文

学校读者我要写书评

暂无评论

倾泻而下的气候影响

环球科学 2024年第5期 92-93页

作者：洛丽·尤姆沙耶基安红猪(译) 不详

一个变暖的世界将产生很多意想不到的深远后果。当人们想象一场自然灾害的后果时,皮肤感染和肠胃病往往不会出现在他们的脑海中,但其实,野火、飓风和其他与气候变化相关的灾难会产生一系列广泛而出乎意料的后果,其中就包含这两种疾病。... 详细信息

一个变暖的世界将产生很多意想不到的深远后果。当人们想象一场自然灾害的后果时,皮肤感染和肠胃病往往不会出现在他们的脑海中,但其实,野火、飓风和其他与气候变化相关的灾难会产生一系列广泛而出乎意料的后果,其中就包含这两种疾病。一份名为《灾难地图集》(Atlas of Disaster)的报告将气候灾难的最初效应及长期后果串联了起来。

关键词：气候变化地图集倾泻而下飓风自然灾害灾难

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

枪支暴力下的精神伤害

环球科学 2024年第5期 22-23页

作者：洛丽·尤姆沙耶基安施怿(译) 不详

自2020年以来,枪支暴力一直是美国19岁以下青少年主要的致死因素。仅在2022年,就有超过4500名青少年和儿童因枪支暴力而死亡,受伤人数则更多。这些统计数据还仅仅是“一种更大型流行病的冰山一角”,宋子睿(Zirui Song,音译)这样表示,他... 详细信息

自2020年以来,枪支暴力一直是美国19岁以下青少年主要的致死因素。仅在2022年,就有超过4500名青少年和儿童因枪支暴力而死亡,受伤人数则更多。这些统计数据还仅仅是“一种更大型流行病的冰山一角”,宋子睿(Zirui Song,音译)这样表示,他在哈佛大学医学院和麻省总医院从事医学和医疗政策研究。

关键词：哈佛大学医学院精神伤害致死因素麻省总医院统计数据医疗政策流行病暴力

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

同性电荷也能相吸

环球科学 2024年第11期 16-17页

作者：洛里·尤姆沙杰基安张宇哲(翻译) 不详

同性电荷相斥、异性电荷相吸是基本的电磁学原理。但几十年来,科学家偶尔会观察到一种反直觉且有争议的现象:当分散到水和醇类等溶剂中后,带同种电荷的颗粒有时也会相互吸引。最近,一项发表于《自然.纳米技术》(Nature Nanotechnology)... 详细信息

同性电荷相斥、异性电荷相吸是基本的电磁学原理。但几十年来,科学家偶尔会观察到一种反直觉且有争议的现象:当分散到水和醇类等溶剂中后,带同种电荷的颗粒有时也会相互吸引。最近,一项发表于《自然.纳米技术》(Nature Nanotechnology)的研究指出,这种现象源于溶剂的分子特性。研究团队观察到,在水中,带负电的二氧化硅颗粒会相互吸引而聚在一起,并形成六角形团簇。

关键词：六角形带负电分子特性研究团队纳米技术二氧化硅颗粒电荷反直觉

Molybdenum disulfide as hydrogen evolution catalyst:From atomistic to materials structure and electrocatalytic performance

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 Energy Chemistry 2023年第12期87卷 256-285,I0007页

作者： Mohsin Muhyuddin Giorgio Tseberlidis Maurizio Filippo Acciarri Oran lori Massimiliano D'Arienzo Massimiliano Cavallini Plamen Atanassov Lior Elbaz Alessandro Lavacchi Carlo Santoro Department of Materials Science University of Milano-BicoccaVia Roberto Cozzi 55Building U520125 MilanItaly Istituto per lo Studio dei Materiali Nanostrutturati (ISMN)Consiglio Nazionale delle Ricerche(CNR)Via P.Gobetti 101BolognaItaly Department of Chemical and Biomolecular Engineering University of CaliforniaIrvineCA 92697United States Department of Chemistry and the Institute of Nanotechnology and Advanced Materials Bar-Ilan UniversityRamat-Gan 5290002Israel Institute of Chemistry of the Organometallic Compounds-National Research Council(ICCOM-CNR) Via Madonna del Piano1050019 Sesto Fiorentino(FI)Italy

Hydrogen production via water electrolysis defines the novel energy vector for achieving a sustainable ***,the true progress of the given technology is hindered by the sluggish and complex hydrogen evolution reaction(HER)occurring at the cathodic side of the system where overpriced and scarce Pt-based electrocatalysts are usually ***,efficient platinum group metals(PGMs)-free electrocatalysts to carry out HER with accelerated kinetics are urgently *** this scenario,molybdenum disulfide(MoS_(2))owing to efficacious structural attributes and optimum hydrogen-binding free energy(ΔG_(H*))is emerging as a reliable alternative to ***,the performance of MoS_(2)-based electrocatalysts is still far away from the benchmark *** HER activity of MoS_(2)can be improved by engineering the structural parameters i.e.,doping,defects inducement,modulating the electronic structure,stabilizing the 1 T phase,creating nanocomposites,and altering the morphologies using appropriate fabrication ***,we have comprehensively reviewed the majority of the scientific endeavors published in recent years to uplift the HER activity of MoS_(2)-based electrocatalysts using different *** in the major fabrication strategies including hydrothermal synthesis methods,chemical vapor deposition,exfoliation techniques,plasma treatments,chemical methodologies,*** tune the structural parameters and hence their ultimate influence on the electrocatalytic activity in acidic and/or alkaline media have been thoroughly *** study can provide encyclopedic insights about the fabrication routes that have been pursued to improve the HER performance of MoS_(2)-based electrocatalysts.

关键词： Hydrogen evolution reaction Molybdenum disulphide Electrocatalysts Synthesis techniques Sustainable energy production Water electrolysis

FAIR Data and Metadata:GNSS Precise Positioning User Perspective

在线全文

学校读者我要写书评

暂无评论

Data Intelligence 2023年第1期5卷 43-74页

作者： Ivana Ivánová Ryan Keenan Christopher Marshall lori Mancell Eldar Rubinov Ryan Ruddick Nicholas Brown Graeme Kernich Spatial Sciences School of Earth and Planetary ScienceCurtin UniversityPerthWestern Australia6102Australia Positioning Insights Carlton NorthVictoria3054Australia FrontierSI Cnr Village St and Fishplate LnDocklandsVictoria3008Australia Geoscience Australia Cnr Jerrabomberra Ave and Hindmarsh DriveSymonstonAustralian Capital Territory2609Australia

The FAIR principles of Wilkinson et al.[1]are finding their way from research into application domains,one of which is the precise positioning with global satellite navigation systems(GNSS).Current GNSS users demand that data and services are findable online,accessible via open protocols(by both,machines and humans),interoperable with their legacy systems and reusable in various *** metadata are essential in seamless communication between GNSS data and service providers and their users,and,for decades,geodetic and geospatial standards are efficiently implemented to support ***,GNSS user community is transforming from precise positioning by highly specialised use by geodetic professionals to every-day precise positioning by autonomous vehicles or wellness obsessed ***,rapid technological developments allow alternative ways of offering data and services to their *** transforming circumstances warrant a review whether metadata defined in generic geospatial and geodetic standards in use still support FAIR use of modern GNSS data and services across its novel user *** paper reports the results of current GNSS users'requirements in various application sectors on the way data,metadata and services are *** engaged with GNSS stakeholders to validate our findings and to gain understanding on their perception of the FAIR *** results confirm that offering FAIR GNSS data and services is fundamental,but for a confident use of these,there is a need to review the way metadata are offered to the *** standard compliant GNSS community metadata profile and providing relevant metadata with data on-demand,the approach outlined in this paper,is a way to manage current GNSS users'expectations and the way to improve FAIR GNSS data and service delivery for both humans and the machines.

关键词： FAIR Metadata Standards Profile Precise positioning GNSS users Spatial data infrastructure

CD4^+ T cell-mediated presentation of non-infectious HIV-1 virion antigens to HIV-specific CD8^+ T cells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Medical Journal 2006年第19期119卷 1629-1638页

作者： XU Jian-qing Franco lori Julianna Lisziewicz State Key Laboratory for Infectious Diseases Prevention and Control National Center for AIDS/STD Control and Prevention Chinese Center for Disease Control and Prevention Beijing 100050 China Research Institute for Genetic and Human Therapy Washington DC 20007 USA

Background The mechanism of chronic immune activation and impairment of HIV-specific immune responses during chronic infection is not fully understood. However, it is known that high immune activation leads to more rapid progression to AIDS. We hypothesize that CD4^＋ T cell-mediated viral antigen presentation contributes to this pathologic immune activation in HIV-infected individuals. Methods HIV-specific T cells, responding to noninfectious HIV-1 virions as antigen, were measured by flow cytometric assays. These experimental conditions reflect the in vivo condition where noninfectious HIV-1 represents more than 99% of the antigens. Results CD4^＋ T cells purified from HIV-infected individuals were capable of cross presenting exogenous noninfectious HIV-1 virions to HIV-1-specific CD8^＋ T cells. Cross presentation required the entry of HIV-1 to CD4^＋ T cells and antigen translocation from endoplasmic reticulum to the Golgi complex. Blocking CD4^＋ mediated activation of HIV-specific CD8^＋ T cells and redirecting the viral antigens to antigen presenting cells improved HIV-specific T cell responses. Contusions One possible cause of chronic immune activation and impairment of HIV-1 specific T cell responses is represented by HIV-1 harboring CD4^＋ T cells cross presenting HIV-1 antigen to activate CD8^＋ T cells. This new mechanism provides the first evidence that cross presentation of noninfectious HIV-1 virions play a role in the immunopathogenesis of HIV-1 infection.

关键词： HIV antigen presenting CD4^+ T cell CD8+ T cell immune pathogenesis