检索结果-南通市图书馆

Horticulture Research 2020年第1期7卷 2395-2403页

作者： Chen-Kai jiang Jian-Qiang Ma Yu-Fei Liu Jie-Dan Chen de-jiang ni Liang Chen Key Laboratory of Tea Biology and Resources Utilization Ministry of Agriculture and Rural AffairsTea Research Institute of the Chinese Academy of Agricultural Sciences9 South Meiling RoadHangzhouZhejiang 310008China College of Horticulture and Forestry Science Huazhong Agricultural University1 Shizishan StreetHongshan DistrictWuhanHubei 430070China Tea Research Institute Yunnan Academy of Agricultural SciencesMenghaiYunnan 666201China

Catechins are the predominant products in tea plants and have essential functions for both plants and *** genes encoding the enzymes regulating catechin biosynthesis have been identified,and the identification of single nucleotide polymorphisms(SNPs)resulting in nonsynonymous mutations within these genes can be used to establish a functional link to catechin ***,the transcriptomes of two parents and four filial offspring were sequenced using next-generation sequencing technology and aligned to the reference genome to enable SNP ***,176 tea plant accessions were genotyped based on candidate SNPs using kompetitive allelespecific polymerase chain reaction(KASP).The catechin contents of these samples were characterized by highperformance liquid chromatography(HPLC),and analysis of variance(ANOVA)was subsequently performed to determine the relationship between genotypes and catechin *** a result of these efforts,a SNP within the chalcone synthase(CHS)gene was shown to be functionally associated with catechin ***,the geographical and interspecific distribution of this SNP was ***,these results will contribute to the early evaluation of tea plants and serve as a rapid tool for accelerating targeted efforts in tea breeding.

关键词： distribution content mining

METABOLIC AND TRANSCRIPTOME ANALYSIS REVEALS METABOLITE VARIATION AND FLAVONOID REGULATORY NETWORKS IN FRESH SHOOTS OF TEA(CAMELLIA SINENSIS)OVER THREE SEASONS

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

Frontiers of Agricultural Science and Engineering 2021年第2期8卷 215-230页

作者： Chen-Kai jiang de-jiang ni Ming-Zhe YAO Jian-Qiang MA Liang CHEN Key Laboratory of Tea Biology and Resources Utilization Ministry of Agriculture and Rural AffairsTea Research Institute of the Chinese Academy of Agricultural SciencesHangzhou 310008China State Key Laboratory for Quality and Safety of Agro-products Zhejiang Academy of Agricultural SciencesHangzhou 310021China College of Horticulture and Forestry Science Huazhong Agricultural UniversityWuhan 430070China.

Metabolites,especially secondary metabolites,are very important in the adaption of tea plants and the quality of tea ***,we focus on the seasonal variation in metabolites of fresh tea shoots and their regulatory mechanism at the transcriptional *** metabolic profiles of fresh tea shoots of 10 tea accessions collected in spring,summer,and autumn were analyzed using ultra-performance liquid chromatography coupled with quadrupole-obitrap mass *** focused on the metabolites and key genes in the phenylpropanoid/flavonoid pathway integrated with transcriptome *** statistical analysis indicates that metabolites were distinctly different with seasonal ***,amino acids,organic acids and alkaloids were the predominant *** of most key genes and downstream compounds in the flavonoid pathway were lowest in spring but the catechin quality index was highest in *** regulatory pathway was explored by constructing a metabolite correlation network and a weighted gene co-expression network.

关键词： harvest season metabolites tea shoots profiled.Mulhvanale statistics transcriptomics untargeted metabolomics

Effects of Soil Characters on the Tea Quality in the Tea Region of Qin-Ba Mountain,Hubei Province,PR China

在线全文

学校读者我要写书评

暂无评论

茶叶 2013年第4期39卷 212-219页

作者： Yu-Qiong Chen Xie-Shu Wang Cheng-Jun Guo Jin Huang Zhi Yu de-jiang ni Key Laboratory of Horticultural Plant Biology Ministry of EducationHuazhong Agricultural University Longwangya Tea farm of Zhuxi County

Based on the analysis of physical and chemical properties of soil,nutrient elements and biochemical compositions of tea leaves,the relationship between soil characters and tea quality was *** results showed that soil total phosphorus,potassium,available potassium,copper and zinc were the main factors which affected and limited the content of nutrient elements of tea ***,soil pH,organic matter,total nitrogen,potassium,exchangeable calcium,magnesium,available copper and zinc were the main factors affecting and limiting the content of biochemical compositions in tea *** quality could be improved by controlling these soil factors.

关键词：茶叶品质土壤特性秦巴山区湖北省营养元素含量茶区中国生化成分

The Tea Tree Genome Provides Insights into Tea Flavor and Independent Evolution of Caffeine Biosynthesis

在线全文

学校读者我要写书评

暂无评论

Molecular Plant 2017年第6期10卷 866-877页

作者： En-Hua Xia Hai-Bin Zhang Jun Sheng Kui Li Qun-Jie Zhang Changhoon Kim Yun Zhang Yuan Liu Ting Zhu Wei Li Hui Huang Yan Tong Hong Nan Cong Shi Chao Shi Jian-Jun jiang Shu-Yan Mao Jun-Ying Jiao Dan Zhang Yuan Zhao You-Jie Zhao Li-Ping Zhang Yun-Long Liu Ben-Ying Liu Yue Yu Sheng-Fu Shao de-jiang ni Evan E. Eichler Li-Zhi Gao Plant Germplasm and Genomics Center Germplasm Bank of Wild Species in Southwestern China Kunming Institute of Botany Chinese Academy of SciencesKunming 650201 China Institution of Genomics and Bioinformatics South China Agricultural University Guangzhou 510642 China University of the Chinese Academy of Sciences Beijing 100039 China Yunnan Agricultural University Kunming 650204 China Agrobiological Gene Research Center Guangdong Academy of Agricultural Sciences Guangzhou 510640 China Macrogene Inc. Seoul 08511 South Korea College of Life Science Liaoning Normal University Dalian 116081 China National Tea Tree Germplasm Bank Tea Research Institute Yunnan Academy of Agricultural Sciences Menghai 666201 China Jinhua International Camellia Germplasm Bank Jinhua 321000 China department of Tea Science Key Lab for Horticultural Plant Biology Huazhong Agricultural University Wuhan 430070 China Howard Hughes Medical Institute University of Washington Seattle WA 98195 USA

Tea is the world＇s oldest and most popular caffeine-containing beverage with immense economic, medicinal, and cultural importance. Here, we present the first high-quality nucleotide sequence of the repeat-rich （80.9%）, 3.02-Gb genome of the cultivated tea tree Camellia sinensis. We show that an extraordinarily large genome size of tea tree is resulted from the slow, steady, and long-term amplification of a few LTR retrotransposon families. In addition to a recent whole-genome duplication event, lineage-specific expansions of genes associated with flavonoid metabolic biosynthesis were discovered, which enhance catechin production, terpene enzyme activation, and stress tolerance, important features for tea flavor and adaptation. We demonstrate an independent and rapid evolution of the tea caffeine synthesis pathway relative to cacao and coffee. A comparative study among 25 Camellia species revealed that higher expression levels of most flavonoid- and caffeinebut not theanine-related genes contribute to the increased production of catechins and caffeine and thus enhance tea-processing suitability and tea quality. These novel findings pave the way for further metabolomic and functional genomic refinement of characteristic biosynthesis pathways and will help develop a more diversified set of tea flavors that would eventually satisfy and attract more tea drinkers worldwide.

关键词： Tea tree genome Comparative genomics Tea flavor Tea-proccessing suitability Global adaptation,Caffeine biosynthesis

Impacts of the annual cycle of background SST in the tropical Pacific on the phase and amplitude of ENSO

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

Atmospheric and Oceanic Science Letters 2025年第1期18卷 12-17页

作者： Song jiang Congwen Zhu ning jiang State Key Laboratory of Severe Weather(LASW) Chinese Academy of Meteorological SciencesBeijingChina College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijingChina

The dominant annual cycle of sea surface temperature(SST)in the tropical Pacific exhibits an antisymmetric mode,which explains 83.4%total variance,and serves as a background of El niño-Southern Oscillation(ENSO).However,there is no consensus yet on its anomalous impacts on the phase and amplitude of *** on data during 1982-2022,results show that anomalies of the antisymmetric mode can affect the evolution of ENSO on the interannual scale via Bjerknes feedback,in which the positive(negative)phase of the antisymmetric mode can strengthen El niño(La niña)in boreal winter via an earlier(delayed)seasonal cycle transition and larger(smaller)annual *** magnitude of the SST anomalies in the equatorial eastern Pacific can reach more than±0.3◦C,regulated by the changes in the antisymmetric mode based on random sensitivity *** reveal the spatial pattern of the annual cycle associated with the seasonal phase-locking of ENSO evolution and provide new insight into the impact of the annual cycle of background SST on ENSO,which possibly carries important implications for forecasting ENSO.

关键词： Annual cycle SST anomaly Antisymmetric mode ENSO

Effect of lamellarization on the microstructure and mechanical properties of marine 10ni5CrMoV steel

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 402-413页

作者： Tao Zou Yanwu Dong Zhouhua jiang Shuyang Du Yushuo Li School of Metallurgy Northeastern UniversityShenyang 110819China Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China Key Laboratory for Ecological Metallurgy of Multimetallic Ores(Ministry of Education) Northeastern UniversityShenyang 110819China

Multistage heat treatment involving quenching(Q),lamellarizing(L),and tempering(T)is applied to marine 10ni5CrMoV *** microstructure and mechanical properties were studied by multiscale characterizations,and the kinetics of reverse austenite transformation,strain hardening behavior,and toughening mechanism were further *** lamellarized specimens possess low yield strength but high toughness,especially cryogenic *** leads to the development of film-like reversed austenite at the martensite block and lath boundaries,refining the martensite structure and lowering the equivalent grain *** analysis of austenite reversion based on the JMAK model shows that the isothermal transformation is dominated by the growth of reversed austenite,and the maximum transformation of reversed austenite is reached at the peak temperature(750℃).The strain hardening behavior based on the modified Crussard-Jaoul analysis indicates that the reversed austenite obtained from lamellarization reduces the proportion of martensite,significantly hindering crack propagation via martensitic transformation during the *** a consequence,the QLT specimens exhibit high machinability and low yield *** with the QT specimen,the ductile-brittle transition temperature of the QLT specimens decreases from-116 to-130℃due to the low equivalent grain size and reversed austenite,which increases the cleavage force required for crack propagation and absorbs the energy of external load,*** work provides an idea to improve the cryogenic toughness of marine 10ni5CrMoV steel and lays a theoretical foundation for its industrial application and comprehensive performance improvement.

关键词： 10ni5CrMoV steel lamellarizing reversed austenite cryogenic toughness ductile-brittle transition temperature

CaH2-promoted activity of ni-carbonate interface for CO2 methanation

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 522-532页

作者： Jin-Peng Wang Guo-Cui Mao Hui-Lin jiang Bao-Xia Dong Yun-Lei Teng School of Chemistry and Chemical Engineering Yangzhou University

Transition metal-carbonate interfaces often act as active sites in heterogeneous catalytic *** interface between transition metal and metal carbonate exhibits a dynamic equilibrium during the CO2hydrogenation reaction,involving surface carbonate hydrogenation and ***,there have been few reports on engineering the activity of the interface between transition metal and alkaline earth metal carbonate for catalytic *** work demonstrated that the incorporation of CaH2in ni/CaCO3enhances the CO2methanation activity of the *** CO2conversion for ni/CaH2-CaCO3reached 68.5%at 400°C,which was much higher than that of the ni/CaCO3（31.6%） and ni/CaH2-CaO （42.4%） ***,the ni/CaH2-CaCO3catalysts remained stable during the stability test for 24 h at 400°C and 8 *** research revealed that CaH2played a crucial role in promoting the activity of the ni-carbonate interface for ***2could modify the electronic structure of ni and tune the structural properties of CaCO3to generate medium basic sites （OH groups）,which are favorable for the activation of H2and ***-situ Fourier transform infrared spectroscopy （FTIR） analysis combined with density functional theory calculations demonstrated that CO2activation occurs at the hydroxyl group （OH） on the CaH2-modified ni-carbonate surface,leading to the formation of CO3H****,our study has confirmed that CO2methanation over the ni/CaH2-CaCO3catalysts proceeds via the formate pathway.

关键词： Metal hydride ni catalysts Carbonate Metal-carbonate interface

Thin-film approximate point scattered function and its application to neutron radiography

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2022年第9期33卷 1-9页

作者： Jun Qin Jia-Yu ni Lin-Feng Ye de-Hong Gao Wei-Jun jiang department of Nuclear Engineering and New Energy Technology The College of Engineering and Technology of Chengdu University of TechnologyLeshan 614000SichuanChina Society for Theoretical and Computational Physics The College of Engineering and Technology of Chengdu University of TechnologyLeshan 614000SichuanChina

A simpler and improved utility approximate point scattered function for thin-film converters currently used in neutron photographic devices is proposed as a correction method to produce clearer,more realistic *** validity of the model was demonstrated through a simulation *** on the results,an error analysis was carried out,certain corrections were made to the original model,and the final model achieved a very low relative error in the simulation *** model can also be optimized for quantitative neutron photographic analysis using iterative algorithms to obtain realistic neutron photographic images more *** the end of the article,the model is extended to consider the case of energy spectrum hardening by introducing a temperature correction parameter.

关键词： Neutron radiography Point scattered function Image processing

Modern phenomics to empower holistic crop science, agronomy, and breeding research

在线全文

学校读者我要写书评

暂无评论

Journal of Genetics and Genomics 2024年第8期51卷 790-800页

作者： ni jiang Xin-Guang Zhu Institute of Genetics and developmental Biology Chinese Academy of SciencesBeijing 100101China Center of Excellence for Molecular Plant Sciences Chinese Academy of SciencesShanghai 200032China

Crop phenomics enables the collection of diverse plant traits for a large number of samples along different time scales,representing a greater data collection throughput compared with traditional *** modern crop phenomics use different sensors to collect reflective,emitted,and fluorescence signals,etc.,from plant organs at different spatial and temporal *** multi-modal,high-dimensional data not only accelerates basic research on crop physiology,genetics,and whole plant systems modeling,but also supports the optimization of field agronomic practices,internal environments of plant factories,and ultimately crop *** challenges and opportunities facing the current crop phenomics research community include developing community consensus or standards for data collection,management,sharing,and processing,developing capabilities to measure physiological parameters,and enabling farmers and breeders to effectively use phenomics in the field to directly support agricultural production.

关键词： Crop phenomics High-throughput phenotyping Traits Crop designer breeding Agronomy

Spectrum analysis of interval process model and its application in uncertain vibration analysis

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第8期67卷 2549-2564页

作者： LI JinWu jiang Chao ni BingYu State Key Laboratory of Advanced design and Manufacturing Technology for Vehicle College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082China

In recent years, the authors have extended the traditional interval method into the time dimension to develop a new mathematical tool called the “interval process model” for quantifying time-varying or dynamic uncertainties. This model employs upper and lower bounds instead of precise probability distributions to quantify uncertainty in a parameter at any given time point. It is anticipated to complement the conventional stochastic process model in the coming years owing to its relatively low dependence on experimental samples and ease of understanding for engineers. Building on our previous work, this paper proposes a spectrum analysis method to describe the frequency domain characteristics of an interval process, further strengthening the theoretical foundation of the interval process model and enhancing its applicability for complex engineering problems. In this approach, we first define the zero midpoint function interval process and its auto/cross-power spectral density(PSD) functions. We also deduce the relationship between the auto-PSD function and the auto-covariance function of the stationary zero midpoint function interval process. Next, the auto/cross-PSD function matrices of a general interval process are defined, followed by the introduction of the concepts of PSD function matrix and cross-PSD function matrix for interval process vectors. The spectrum analysis method is then applied to random vibration problems, leading to the creation of a spectrum-analysis-based interval vibration analysis method that determines the PSD function for the system displacement response under stationary interval process excitations. Finally, the effectiveness of the formulated spectrum-analysis-based interval vibration analysis approach is verified through two numerical examples.

关键词： interval process spectrum analysis power spectral density(PSD) time-varying uncertainty uncertain vibration analysis