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J.D.Power & Associates 2004 APEAL调研
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作者 朱敏慧 《汽车与配件》 2004年第48期22-23,共2页
J D Power & Associates 2004汽车性能、操控和设计(Automotive Performance,Execution and Layout,简称APEAL)调研结果日前公布.调研显示,一批2004年推出新车型因为其大胆的风格、创新的配置而受到用户的欢迎,市场表现出色.
关键词 J.D.POWER associates2004 APEAL 汽车性能 汽车操控 汽车设计
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J.D Power代表公信力——访J.D.Powerand Associates公司全球执行副总裁Jamey Power
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作者 唐洋 《时代汽车》 2006年第8期41-42,共2页
随着中国汽车产业的快速发展,越来越多的国际性权威汽车调研咨询机构把目光集中在中国。其中J.D.Powerand Associates公司(以下简称J.D Power)自2000年起进人中国,通过与中国汽车工业协会合作,在行业内已产生了较大的影响。由... 随着中国汽车产业的快速发展,越来越多的国际性权威汽车调研咨询机构把目光集中在中国。其中J.D.Powerand Associates公司(以下简称J.D Power)自2000年起进人中国,通过与中国汽车工业协会合作,在行业内已产生了较大的影响。由于该公司致力于向公众提供基于消费者意见的信息来源,并以独立、公正、客观反映消费者意见而成为世界知名信息服务品牌。因此世界著名汽车跨国集团都十分重视J.D Power的调查结果,同时J.D Power对中国汽车企业的影响也越来越大。 展开更多
关键词 associates公司 POWER 中国汽车工业协会 总裁 全球 汽车产业 咨询机构 服务品牌 调查结果 汽车企业
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美国Redinger & Associates公司对HSE管理绩效测量的要点介绍 被引量:1
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作者 王廷春 《安全、健康和环境》 2006年第6期2-5,共4页
美国Redinger&Associates公司是在世界范围内从事职业健康、安全和环境评价,HSE管理体系建立策划,绩效测量研究开发,保证已实施HSE管理体系的组织能持续改进其业绩的知名公司之一,文章介绍了该公司对已建立并实施HSE管理体系的组织... 美国Redinger&Associates公司是在世界范围内从事职业健康、安全和环境评价,HSE管理体系建立策划,绩效测量研究开发,保证已实施HSE管理体系的组织能持续改进其业绩的知名公司之一,文章介绍了该公司对已建立并实施HSE管理体系的组织进行绩效测量的定性要求与建议。 展开更多
关键词 HSE管理 绩效测量 Redinger & associates公司
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Integration Associates公司推出无线芯片组
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《电子产品世界》 2004年第05B期27-28,共2页
关键词 频移键控收发芯片组 无线芯片组 自动天线调整技术 INTEGRATION associates公司
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W.L.Gore & Associates公司:封闭的冻干容器
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《流程工业》 2008年第4期36-36,共1页
W.L.Gore公司推出了Lyoguard型冻干容器,该产品可应用于科研和稳定性研究、规模化评估以及多种产品的冻干工艺,效果十分理想,并可提供与冻干托盘类似的产品保护。该产品为一次性使用的消毒容器,可以存放多达60ml的产品,并且装有... W.L.Gore公司推出了Lyoguard型冻干容器,该产品可应用于科研和稳定性研究、规模化评估以及多种产品的冻干工艺,效果十分理想,并可提供与冻干托盘类似的产品保护。该产品为一次性使用的消毒容器,可以存放多达60ml的产品,并且装有可拆除的螺旋盖,可以方便地取用。 展开更多
关键词 associates公司 冻干工艺 容器 产品保护 封闭 一次性使用 稳定性 规模化
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SUBLIMINALASSOCIATES
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《计算机光盘软件与应用(COMPUTER ARTS数码艺术)》 2004年第3期48-53,共6页
“接下来我们将制作宝马汽车的小册子。”Jonalhan Taylor-Home说道,“我不再想制作唱片封套之类的东西了,其结果往往是耗时六个月,开过20次会议,而且费用有限。”我们碰上了一个健谈的设计代理……
关键词 PHOTOSHOP 图像处理软件 应用软件 SUBLIMINAL associates
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Manhattan Associates推出EEM软件
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《现代制造》 2009年第8期24-24,共1页
Manhattan Associates公司推出的拓展企业管理(EEM)解决方案,帮助那些需要管理用户订单、装运和存货的第三方物流提供商进行可视化管理。该方案通过管理“点对点”装运过程和提供具有直接履行全方位任务能力的网络采帮助第三方物流... Manhattan Associates公司推出的拓展企业管理(EEM)解决方案,帮助那些需要管理用户订单、装运和存货的第三方物流提供商进行可视化管理。该方案通过管理“点对点”装运过程和提供具有直接履行全方位任务能力的网络采帮助第三方物流整理和输送库存物料。 展开更多
关键词 associates公司 EEM 第三方物流 软件 企业管理 可视化管理 管理用户 提供商
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Hawkins Wright和Brian McClay & Associates在上海联合举办纸浆第三届研讨会
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作者 梁川 郭彩云 《造纸信息》 2015年第4期69-69,共1页
梁川郭彩云报道2015年3月27日,Hawkins Wright和Brian McC lay&Associates在上海联合举办第三届纸浆研讨会。来自中国、美国、加拿大、澳大利亚、瑞典、日本、智利、巴西等国家的主要纸浆生产商、贸易商、纸浆用户齐聚上海,共同探讨纸... 梁川郭彩云报道2015年3月27日,Hawkins Wright和Brian McC lay&Associates在上海联合举办第三届纸浆研讨会。来自中国、美国、加拿大、澳大利亚、瑞典、日本、智利、巴西等国家的主要纸浆生产商、贸易商、纸浆用户齐聚上海,共同探讨纸浆产业可持续发展的未来。Hawkins Wright公司董事长Roger Wright先生首先致欢迎词。上海复旦大学教授李伟森先生、 展开更多
关键词 Hawkins Brian McClay associates 纸浆生产 中国造纸协会 生活用纸 雷先生 复旦大学教授 商品浆 纤维资源
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Studies on the Associates of <i>Conocephalum conicum</i>L. (Dumort.) and <i>Dumortiera hirsuta</i>Sw. (Nees)
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作者 Mudassar Iqbal Fayaz Ahmad Butt +1 位作者 Anima Langer Afroz Alam 《American Journal of Plant Sciences》 2011年第3期283-286,共4页
Paper includes information on association of 46 populations of Conocephalum conicum L. (Dumort.) and 25 of Dumortiera hirsuta Sw. (Nees) with diverse organisms, including fungi, bryophytes, pteridophytes, gymnosperms,... Paper includes information on association of 46 populations of Conocephalum conicum L. (Dumort.) and 25 of Dumortiera hirsuta Sw. (Nees) with diverse organisms, including fungi, bryophytes, pteridophytes, gymnosperms, angiosperms and an insect. 展开更多
关键词 LIVERWORTS ASSOCIATION Conocephalum conicum Dumortiera hirsuta
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Influence of Low-Frequency Sonolysis on the Stability of Reactions Involving Associates
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作者 Tatiana P. Kulagina Lev P. Smirnov Zoya S. Andrianova 《Journal of Applied Mathematics and Physics》 2019年第12期2950-2957,共8页
The influence of low-frequency sonolysis on the kinetics bimolecular liquid-phase reactions was studied with due regard for the association (dimers and trimers) of starting reagents. The mathematical modeling of chemi... The influence of low-frequency sonolysis on the kinetics bimolecular liquid-phase reactions was studied with due regard for the association (dimers and trimers) of starting reagents. The mathematical modeling of chemical reactions that were described by nonlinear differential equations is performed. The steady states, the singular points characteristics, the nature of concentration oscillations in the reaction system are described. With increasing frequency and amplitude of low-frequency sonic waves (up to some critical value), we observed the cessation of the reaction. This observation offers an additional tool for controlling reaction rate by the external action of low-frequency vibrations. The conclusions of the work are obtained under certain assumptions. The exact determination of the critical conditions for changes in dynamics is beyond the scope of the problem. 展开更多
关键词 Chemical Reaction Kinetics Liquid Medium REAGENT Association LOW-FREQUENCY Action BISTABILITY Regime Oscillation Resonant Change
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Industrial Carbon Emission Distribution and Regional Joint Emission Reduction:A Case Study of Cities in the Pearl River Basin,China 被引量:2
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作者 JIANG Hongtao YIN Jian +4 位作者 ZHANG Bin WEI Danqi LUO Xinyuan DING Yi XIA Ruici 《Chinese Geographical Science》 SCIE CSCD 2024年第2期210-229,共20页
China’s low-carbon development path will make significant contributions to achieving global sustainable development goals.Due to the diverse natural and economic conditions across different regions in China,there exi... China’s low-carbon development path will make significant contributions to achieving global sustainable development goals.Due to the diverse natural and economic conditions across different regions in China,there exists an imbalance in the distribution of car-bon emissions.Therefore,regional cooperation serves as an effective means to attain low-carbon development.This study examined the pattern of carbon emissions and proposed a potential joint emission reduction strategy by utilizing the industrial carbon emission intens-ity(ICEI)as a crucial factor.We utilized social network analysis and Local Indicators of Spatial Association(LISA)space-time trans-ition matrix to investigate the spatiotemporal connections and discrepancies of ICEI in the cities of the Pearl River Basin(PRB),China from 2010 to 2020.The primary drivers of the ICEI were determined through geographical detectors and multi-scale geographically weighted regression.The results were as follows:1)the overall ICEI in the Pearl River Basin is showing a downward trend,and there is a significant spatial imbalance.2)There are numerous network connections between cities regarding the ICEI,but the network structure is relatively fragile and unstable.3)Economically developed cities such as Guangzhou,Foshan,and Dongguan are in the center of the network while playing an intermediary role.4)Energy consumption,industrialization,per capita GDP,urbanization,science and techno-logy,and productivity are found to be the most influential variables in the spatial differentiation of ICEI,and their combination in-creased the explanatory power of the geographic variation of ICEI.Finally,through the analysis of differences and connections in urban carbon emissions under different economic levels and ICEI,the study suggests joint carbon reduction strategies,which are centered on carbon transfer,financial support,and technological assistance among cities. 展开更多
关键词 industrial carbon emission intensity carbon emission social network analysis Location Indicators of Spatial Association(LISA) geographical detector multi-scale geographically weighted regression Pearl River Basin(PRB) China
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Identification of SSR markers linked to the abscission of cotton boll traits and mining germplasm in Cotton 被引量:1
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作者 SHUI Guangling LIN Hairong +9 位作者 MA Xiaomei ZHU Bo HAN Peng AINI Nurimanguli GUO Chunping WU Yuanlong PAN Zhenyuan YOU Chunyuan SONG Guoli NIE Xinhui 《Journal of Cotton Research》 CAS 2024年第2期177-187,共11页
Background Cotton is an economically important crop.It is crucial to find an effective method to improve cotton yield,and one approach is to decrease the abscission of cotton bolls and buds.However,the lack of knowled... Background Cotton is an economically important crop.It is crucial to find an effective method to improve cotton yield,and one approach is to decrease the abscission of cotton bolls and buds.However,the lack of knowledge of the genetic and molecular mechanisms underlying cotton boll abscission traits has hindered genetic improvements.Results Pearson’s correlation analysis revealed a significant positive correlation between boll abscission rates 1(AR1)and boll abscission rates 2(AR2).A genome-wide association study was conducted on 145 loci that exhibited high polymorphism and were uniformly distributed across 26 chromosomes(pair).The study revealed 18,46,and 62 markers that were significantly associated with boll abscission,fiber quality,and yield traits(P<0.05),explaining 1.75%–7.13%,1.16%–9.58%,and 1.40%–5.44%of the phenotypic variation,respectively.Notably,the marker MON_SHIN-1584b was associated with the cotton boll abscission trait,whereas MON_CGR5732a was associated with cotton boll abscission and fiber quality traits.Thirteen of the marker loci identified in this study had been previously reported.Based on phenotypic effects,six typical cultivars with elite alleles related to cotton boll abscission,fiber quality,and yield traits were identified.These cultivars hold great promise for widespread utilization in breeding programs.Conclusions These results lay the foundation for understanding the molecular regulatory mechanism of cotton boll abscission and provide data for the future improvement of cotton breeding. 展开更多
关键词 SSR Genome wide association studies ABSCISSION Favorable alleles COTTON Genetic improvement
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Unveiling DNA methylation in Alzheimer’s disease:a review of array-based human brain studies 被引量:1
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作者 Victoria Cunha Alves Eva Carro Joana Figueiro-Silva 《Neural Regeneration Research》 SCIE CAS CSCD 2024年第11期2365-2376,共12页
The intricacies of Alzheimer’s disease pathogenesis are being increasingly illuminated by the exploration of epigenetic mechanisms,particularly DNA methylation.This review comprehensively surveys recent human-centere... The intricacies of Alzheimer’s disease pathogenesis are being increasingly illuminated by the exploration of epigenetic mechanisms,particularly DNA methylation.This review comprehensively surveys recent human-centered studies that investigate whole genome DNA methylation in Alzheimer’s disease neuropathology.The examination of various brain regions reveals distinctive DNA methylation patterns that associate with the Braak stage and Alzheimer’s disease progression.The entorhinal cortex emerges as a focal point due to its early histological alterations and subsequent impact on downstream regions like the hippocampus.Notably,ANK1 hypermethylation,a protein implicated in neurofibrillary tangle formation,was recurrently identified in the entorhinal cortex.Further,the middle temporal gyrus and prefrontal cortex were shown to exhibit significant hypermethylation of genes like HOXA3,RHBDF2,and MCF2L,potentially influencing neuroinflammatory processes.The complex role of BIN1 in late-onset Alzheimer’s disease is underscored by its association with altered methylation patterns.Despite the disparities across studies,these findings highlight the intricate interplay between epigenetic modifications and Alzheimer’s disease pathology.Future research efforts should address methodological variations,incorporate diverse cohorts,and consider environmental factors to unravel the nuanced epigenetic landscape underlying Alzheimer’s disease progression. 展开更多
关键词 Alzheimer’s disease ANK1 BIN1 DNA methylation epigenome-wide association studies HOXA3 MCF2L RHBDF2
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Analysis of the joint detection capability of the SMILE satellite and EISCAT-3D radar 被引量:2
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作者 JiaoJiao Zhang TianRan Sun +7 位作者 XiZheng Yu DaLin Li Hang Li JiaQi Guo ZongHua Ding Tao Chen Jian Wu Chi Wang 《Earth and Planetary Physics》 EI CSCD 2024年第1期299-306,共8页
The Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)satellite is a small magnetosphere–ionosphere link explorer developed cooperatively between China and Europe.It pioneers the use of X-ray imaging technology... The Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)satellite is a small magnetosphere–ionosphere link explorer developed cooperatively between China and Europe.It pioneers the use of X-ray imaging technology to perform large-scale imaging of the Earth’s magnetosheath and polar cusp regions.It uses a high-precision ultraviolet imager to image the overall configuration of the aurora and monitor changes in the source of solar wind in real time,using in situ detection instruments to improve human understanding of the relationship between solar activity and changes in the Earth’s magnetic field.The SMILE satellite is scheduled to launch in 2025.The European Incoherent Scatter Sciences Association(EISCAT)-3D radar is a new generation of European incoherent scatter radar constructed by EISCAT and is the most advanced ground-based ionospheric experimental device in the high-latitude polar region.It has multibeam and multidirectional quasi-real-time three-dimensional(3D)imaging capabilities,continuous monitoring and operation capabilities,and multiple-baseline interferometry capabilities.Joint detection by the SMILE satellite and the EISCAT-3D radar is of great significance for revealing the coupling process of the solar wind–magnetosphere–ionosphere.Therefore,we performed an analysis of the joint detection capability of the SMILE satellite and EISCAT-3D,analyzed the period during which the two can perform joint detection,and defined the key scientific problems that can be solved by joint detection.In addition,we developed Web-based software to search for and visualize the joint detection period of the SMILE satellite and EISCAT-3D radar,which lays the foundation for subsequent joint detection experiments and scientific research. 展开更多
关键词 Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)satellite European Incoherent Scatter Sciences Association(EISCAT)-3D radar joint detection
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Sedimentological evidence of climate-tectonic interaction in the upper Satluj catchment of NW Himalaya
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作者 JOSHI Moulishree JALAL Poonam 《Journal of Mountain Science》 SCIE CSCD 2024年第6期1978-1991,共14页
Quaternary valley fill deposits in the Upper Satluj Valley of NW Himalaya act as archives of changing climate-tectonic dynamics in a region.Quaternary landforms help in decoding the relationship between climate and te... Quaternary valley fill deposits in the Upper Satluj Valley of NW Himalaya act as archives of changing climate-tectonic dynamics in a region.Quaternary landforms help in decoding the relationship between climate and tectonics.Kinnaur region is traversed by several active faults and thrusts such as the Kaurik-Chango Fault(KCF)and Sangla Detachment(SD),thereby making upper Satluj Valley tectonically active.Morphotectonic parameters such as width of valley floor(Vfw),Normalized Steepness Index(KSn)and geomorphological evidences such as the presence of huge strath terraces,narrowing of the river valley and palaeolake deposits point towards the tectonically active nature of the terrain.This arid,high elevation region is also climatically sensitive as it falls in a transient climatic zone which receives rainfall only during abnormal monsoon months.Excessive rainfall causes outburst floods,a common phenomenon in the area due to the blocking of headwater in the upper reaches of the Satluj valley.As a result,the Quaternary sequence is modified from time to time.The transition from hypo concentrated deposits to channel deposits and ponding events are prominent in the depositional sequence,resulting from a response to climate.The studied Quaternary sediments reveal that the Trans-Himalayan region of the upper Satluj valley is affected by tectonic-climate variability,making it vulnerable to geohazards. 展开更多
关键词 Himachal Pradesh QUATERNARY Lithofacies association TECTONICS CLIMATE
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A micro-crosslinked amphoteric hydrophobic association copolymer as high temperature-and salt-resistance fluid loss reducer for water-based drilling fluids
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作者 Jian Li Yu-Xi Ji +3 位作者 Xiao-Xiao Ni Kai-He Lv Xian-Bin Huang Jin-Sheng Sun 《Petroleum Science》 SCIE EI CAS CSCD 2024年第3期1980-1991,共12页
During ultradeep oil and gas drilling,fluid loss reducers are highly important for water-based drilling fluids,while preparing high temperature-and salt-resistance fluid loss reducers with excellent rheology and filtr... During ultradeep oil and gas drilling,fluid loss reducers are highly important for water-based drilling fluids,while preparing high temperature-and salt-resistance fluid loss reducers with excellent rheology and filtration performance remains a challenge.Herein,a micro-crosslinked amphoteric hydrophobic association copolymer(i.e.,DADC)was synthesized using N,N-dimethyl acrylamide,diallyl dimethyl ammonium chloride,2-acrylamido-2-methylpropane sulfonic acid,hydrophobic monomer,and pentaerythritol triallyl ether crosslinker.Due to the synergistic effects of hydrogen bonds,electrostatic interaction,hydrophobic association,and micro-crosslinking,the DADC copolymer exhibited outstanding temperature-and salt-resistance.The rheological experiments have shown that the DADC copolymer had excellent shear dilution performance and a certain degree of salt-responsive viscosity-increasing performance.The DADC copolymer could effectively adsorb on the surface of bentonite particles through electrostatic interaction and hydrogen bonds,which bring more negative charge to the bentonite,thus improving the hydration and dispersion of bentonite particles as well as the colloidal stability of the drilling fluids.Moreover,the drilling fluids constructed based on the DADC copolymer exhibited satisfactory rheological and filtration properties(FLHTHP=12 m L)after aging at high temperatures(up to200℃)and high salinity(saturated salt)environments.Therefore,this work provided new insights into designing and fabricating high-performance drilling fluid treatment agents,demonstrating good potential applications in deep and ultradeep drilling engineering. 展开更多
关键词 Fluid loss reducer Temperature-and salt-resistance Hydrophobic association AMPHOTERIC Micro-crosslinking
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Quantitative assessment of self-management in patients with nonalcoholic fatty liver disease: An unmet clinical need
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作者 Raffaele Borriello Giorgio Esposto +2 位作者 Irene Mignini Antonio Gasbarrini Maria Assunta Zocco 《World Journal of Gastroenterology》 SCIE CAS 2024年第25期3143-3146,共4页
In this editorial we comment on the article titled“Establishment and validation of an adherence prediction system for lifestyle interventions in non-alcoholic fatty liver disease”by Zeng et al published in a recent ... In this editorial we comment on the article titled“Establishment and validation of an adherence prediction system for lifestyle interventions in non-alcoholic fatty liver disease”by Zeng et al published in a recent issue of the World Journal of Gastroenterology.Non-alcoholic fatty liver disease(NAFLD)represents one of the current challenges in hepatology and public health,due to its continuous growing prevalence and the rising incidence of NAFLD-related fibrosis,non-alcoholic steatohepatitis and cirrhosis.The only effective therapeutic strategy for this dis-ease is represented by encouraging patients to improve their lifestyle through the modification of dietary intake and increased physical exercise,but the effective application of such modifications is often limited by various factors such as lack of information,psychological barriers or poor social support.While poor adherence to a healthy lifestyle can be decisive in determining the clinical outcome,in daily practice there is a lack of quantitative instruments aimed at identifying patients with the lowest adherence to lifestyle changes and higher risk of disease progre-ssion in the course of follow-up.In this article,Zeng et al propose a quantitative scale to assess the grade of adherence of patients with NAFLD to hea-lthy lifestyle intervention,called the Exercise and Diet Adherence Scale(EDAS).This scale,consisting of 33 items divided into 6 dimensions which relates to six subjective aspects in the self-management of NAFLD,has shown a good correlation with the identification of the sub-cohort of patients with the highest reduction in caloric intake,increase in physical exercise,probability of a reduction in liver stiffness measurement and alanine aminotransferase levels.The cor-relation among clinical outcomes and specific dimensions of this scale also highlights the pivotal role of a good and confidential doctor-patient relationship and of an effective communication.There is an urgent need for practical and effective instruments to assess the grade of self-management of NAFLD patients,together with the development of multidisciplinary teams with the aim of applying structured behavioral interventions. 展开更多
关键词 Non-alcoholic fatty liver disease Non-alcoholic steatohepatitis Liver cirrhosis Metabolic associated fatty liver disease Metabolic associated steatohepatitis Insulin resistance SELF-MANAGEMENT Self-management measurement Patient education
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Population genomic analysis reveals key genetic variations and the driving force for embryonic callus induction capability in maize
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作者 Peng Liu Langlang Ma +8 位作者 Siyi Jian Yao He Guangsheng Yuan Fei Ge Zhong Chen Chaoying Zou Guangtang Pan Thomas Lübberstedt Yaou Shen 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2024年第7期2178-2195,共18页
Genetic transformation has been an effective technology for improving the agronomic traits of maize.However,it is highly reliant on the use of embryonic callus(EC)and shows a serious genotype dependence.In this study,... Genetic transformation has been an effective technology for improving the agronomic traits of maize.However,it is highly reliant on the use of embryonic callus(EC)and shows a serious genotype dependence.In this study,we performed genomic sequencing for 80 core maize germplasms and constructed a high-density genomic variation map using our newly developed pipeline(MQ2Gpipe).Based on the induction rate of EC(REC),these inbred lines were categorized into three subpopulations.The low-REC germplasms displayed more abundant genetic diversity than the high-REC germplasms.By integrating a genome-wide selective signature screen and region-based association analysis,we revealed 95.23 Mb of selective regions and 43 REC-associated variants.These variants had phenotypic variance explained values ranging between 21.46 and 49.46%.In total,103 candidate genes were identified within the linkage disequilibrium regions of these REC-associated loci.These genes mainly participate in regulation of the cell cycle,regulation of cytokinesis,and other functions,among which MYB15 and EMB2745 were located within the previously reported QTL for EC induction.Numerous leaf area-associated variants with large effects were closely linked to several REC-related loci,implying a potential synergistic selection of REC and leaf size during modern maize breeding. 展开更多
关键词 MAIZE genetic transformation embryonic callus selective signal association analysis
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Epistasis-aware genome-wide association studies provide insights into the efficient breeding of high-yield and high-quality rice
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作者 Xiaogang He Zirong Li +6 位作者 Sicheng Guo Xingfei Zheng Chunhai Liu Zijie Liu Yongxin Li Zheming Yuan Lanzhi Li 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2024年第8期2541-2556,共16页
Marker-assisted selection(MAS)and genomic selection(GS)breeding have greatly improved the efficiency of rice breeding.Due to the influences of epistasis and gene pleiotropy,ensuring the actual breeding effect of MAS a... Marker-assisted selection(MAS)and genomic selection(GS)breeding have greatly improved the efficiency of rice breeding.Due to the influences of epistasis and gene pleiotropy,ensuring the actual breeding effect of MAS and GS is still a difficult challenge to overcome.In this study,113 indica rice varieties(V)and their 565 testcross hybrids(TC)were used as the materials to investigate the genetic basis of 12 quality traits and nine agronomic traits.The original traits and general combining ability of the parents,as well as the original traits and midparent heterosis of TC,were subjected to genome-wide association analysis.In total,381 primary significantly associated loci(SAL)and 1,759 secondary SALs that had epistatic interactions with these primary SALs were detected.Among these loci,322 candidate genes located within or nearby the SALs were screened,204 of which were cloned genes.A total of 39 MAS molecular modules that are beneficial for trait improvement were identified by pyramiding the superior haplotypes of candidate genes and desirable epistatic alleles of the secondary SALs.All the SALs were used to construct genetic networks,in which 91 pleiotropic loci were investigated.Additionally,we estimated the accuracy of genomic prediction in the parent V and TC by incorporating either no SALs,primary SALs,secondary SALs or epistatic effect SALs as covariates.Although the prediction accuracies of the four models were generally not significantly different in the TC dataset,the incorporation of primary SALs,secondary SALs,and epistatic effect SALs significantly improved the prediction accuracies of 5(26%),3(16%),and 11(58%)traits in the V dataset,respectively.These results suggested that SALs and epistatic effect SALs identified based on an additive genotype can provide considerable predictive power for the parental lines.They also provide insights into the genetic basis of complex traits and valuable information for molecular breeding in rice. 展开更多
关键词 rice genome-wide association study EPISTASIS gene pleiotropy maker-associated selection genome selection
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Distribution and dynamics of niche and interspecific association of dominant phytoplankton species in the Feiyun River basin,Zhejiang,China
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作者 Shengnan ZHU Zengchuan DONG +6 位作者 Guobin FU Shujun WU Jinyu MENG Weilin LIU Yupeng LIU Xun CUI Yuejiao ZHOU 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2024年第4期1157-1172,共16页
To investigate the dominant species and interspecific association in the phytoplankton community of the Feiyun River basin in Zhejiang Province,East China,the main stream and the Shanxi Zhaoshandu Reservoir in the dow... To investigate the dominant species and interspecific association in the phytoplankton community of the Feiyun River basin in Zhejiang Province,East China,the main stream and the Shanxi Zhaoshandu Reservoir in the downstream were chosen as the study area,for which 22 sampling sites were designated.Sampling was conducted in September 2021,January,May,and July 2022.Phytoplankton species were identified from both quantitative samples and in-vivo observations.Phytoplankton was quantified by direct counting.Results show that there were 98 species belonging to 6 phyla and 78 genera.In addition,to clarify the niches of the dominant phytoplankton species and their interspecific association,the dominance index was calculated,and a comprehensive analysis was conducted including niche width,niche overlap value,ecological response rate,overall association,chi-square test,and the stability.The phytoplankton community exhibited characteristics of a Cyanobacteria-Chlorophyta-Diatom type community,showing higher diversity in spring and lower diversity in summer.Among 11 dominants phytoplankton species from 3 phyla,both frequency and dominance degree varied seasonally,of which Microcystis sp.was the dominant species in Spring,Autumn,and Winter.The niche widths of the dominant species ranged from 0.234 to 0.933,and were categorized into three groups.The niche overlap values of the 11 dominant species ranged from 0.359 to 0.959,exhibiting significant seasonal differences-highest in winter followed by autumn,spring,and summer in turn.The overall correlation among dominant species in all four seasons revealed a non-significant negative association,resulting in an unstable community structure.A significant portion(84.2%)of species pairs displayed positive associations,suggesting a successional pattern where Diatoms dominated while other dominant species shared resources and space.Despite this pattern,stability measurements indicated that the dominant species community remained unstable.Therefore,careful monitoring is recommended for potential water environment issues arising from abnormal proliferation of dominant species in the watershed during winter.This research built a theoretical foundation with a data support to the early warning of eutrophication and provided a reference for water resources management in similar watersheds along the eastern coast of China. 展开更多
关键词 PHYTOPLANKTON dominant species NICHE interspecific association Feiyun River basin
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