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Genetic insights into adaptation of alfalfa

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Molecular Plant 2024年第8期17卷 1170-1171页

作者： yafei guo Lipeng Kang Fei Lu State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina Key Laboratory of Seed Innovation Institute of Genetics and Developmental BiologyChineseAcademyof SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina CAS-JIC Centre of Excellence for Plant and Microbial Science(CEPAMS) Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina

Climate change is increasingly affecting agricultural outputs,as evidenced by the changing global temperature and extreme weather events that significantly impact crop yields(Lesk et al.,2016).To address this challenge,there is a growing interest in developing crops that can endure these adverse conditions to ensure food *** examples in nature show how crops have adapted to diverse environments(Gutaker and Purugganan,2023),leaving behind a rich genomic *** genomics has started to provide insights into these adaptive processes from evolutionary and genetic perspectives(Savolainen et al.,2013;Aguirre-Liguori et al.,2021;Sang et al.,2022).Recently,Zhang et al.(Zhang et al.,2024)investigated alfalfa(Medicago sativa ***),known as the"queen of forages,"for its broad *** analyzing whole-genome sequencing data of 702 accessions from 24 Medicago species,this study enriches our understanding of how to develop crops and meet the challenges of climate change.

关键词： sativa crops environments

Metastable Phase Equilibrium in the Reciprocal Quaternary System LiCl＋MgCl2＋Li2SO4＋MgSO4＋H2O at 348.15 K and 0.1 MPa

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Chemical Research in Chinese Universities 2018年第5期34卷 798-802页

作者： YU Xiaoping WANG Qin guo yafei DENG Tianlong Tianjin Key Laboratory of Marine Resources and Chemistry College of Chemical Engineering and Materials Science Tianjin University of Science and Technology Tianjin 300457 P. R. China College of Chemistry and A laterials Science Northwest University Xi 'an 710127 P. R. China

The metastable solubilities and the physicochemical properties including density and pH of the reciprocal quaternary system（LiCl＋MgCl2＋Li2SO4＋MgSO4＋H2O） at 348.15 K and 0.1 MPa were determined using the isother- mal evaporation method. The dry-salt diagram and water-phase diagram were plotted based on the experimental data. There are five invariant points, eleven tmivariant curves, and seven crystallization zones corresponding to hexahy- drite, tetrahydrite, kieserite, bischofite, lithium sulfate monohydrate, lithium chloride monohydrate and lithium car- nallite. Comparison between the stable and metastable diagrams at 348.15 K indicates that the metastable phenome- non of magnesium sulfate is obvious, and the crystallization regions of hexahydrite and tetrahydrite disappear in the stable phase diagram. A comparison of the metastable dry-salt phase diagrams at 308.15, 323.15 and 348.15 K shows that with the increasing of temperatttre the epsomite crystallization zone disappears from the dry-salt phase diagranl of 303.15 K, and a new kieserite crystallization zone is presented at 348.15 K. The density and pH in the metastable equilibrium solution present regular change with the increasing of Janecke index J（2Li＋）, and the calculated densities using the empirical equation agree well with the experimental values.

关键词： Phase equilibrium Phase diagram Solubility Quaternary system Lithium salt

Solid and Liquid Metastable Phase Equilibria in the Aqueous Quaternary System Li＋, Mg2＋//SO42-, Borate-H2O at 273.15 K

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Chemical Research in Chinese Universities 2017年第4期33卷 655-659页

作者： MENG Lingzong guo yafei LI Dan DENG Tianlong Tianfin Key Laboratory of Marine Resou~es and Chemistry College of Chemical Engineering and Material Sciences Tianjin University of Science and Technology Tianjin 300457 P. R. China School of Chemistry and Chemical Engineering Linyi University Linyi 276005 P. R. China CAS Key Laboratory of Salt Lake Resources and Chemistry Qinghai Institute of Salt Lakes Chinese Aeademy of Sciences Xining 810008 P. R. China

The metastable phase equilibria of the Li＋, Mg2＋//SO42-, borate-H2O system at 273.15 K were studied using isothermal evaporation method. The dry-salt phase diagram, water-phase diagram and the physicochemical property diagrams of the system were plotted with the metastable solubility values and physicochemical properties corresponding to density, refractive index, pH value and conductivity. The dry-salt diagram was composed of four crys- tallizing zones[lithium sulfate hydrate（Li2SO4·H2O）, epsomite（MgSO4·7H2O）, lithium metaborate octahy- drate（LiBO2.8H2O）, and hungchaoite（MgB4O7·9H2O）], five univariant curves and two invariant points （Li2SO4·H2O＋MgSO4·7H2O＋MgB4O7·9H2O and Li2SO4·H2O＋LiBO2-8H2O＋MgB4O7·9H20）. Li2B4O7 converted in- to LiBO2 in solution. Comparing the metastable phase diagram at 273.15 K and stable phase diagram at 298.15 K for the system, the crystallized area of Li2SO4·H2O and MgSO4·7H2O became large, whereas, the other phase regions became small. The J（H2O） changes regularly with increasing J（SO42-）, and the physicochemical properties change regularly with the concentration of B4O72- increasing.

关键词： Metastable phase equilibrium Phase diagram Solubility Lithium metaborate octahydrate Hungchaoite

Constructing porous ZnFC-PA/PSF composite spheres for highly efficient Cs^(+) removal

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Journal of Environmental Sciences 2024年第9期143卷 126-137页

作者： Senjian Han Chao Gao Wenfeng Yan yafei guo Shiqiang Wang Tianlong Deng College of Marine and Environmental Sciences Tianjin University of Science and TechnologyTianjin 300457China Key Laboratory of Marine Resource Chemistry and Food Technology Ministry of EducationTianjin 300457China

Radioisotope leaking from nuclear waste has become an intractable problem due to its gamma radiation and strong water *** this work,a novel porous ZnFC-PA/PSF composite sphere was fabricated by immobilization of ferrocyanides modified zinc phytate into polysulfone(PSF)substrate for the treatment of Cs-contaminated *** maximum adsorption capacity of ZnFC-PA/PSF was 305.38 mg/g,and the removal efficiency of Cs+was reached 94.27%within 2 *** ZnFC-PA/PSF presented favorable stability with negligible dissolution loss of Zn^(2+)and Fe^(2+)(<2%).The ZnFC-PA/PSF achieved high-selectivity towards Cs+(K_(d)=2.24×10^(4)mL/g)even in actual geothermal *** adsorption mechanism was inferred to be the ion-exchange between Cs^(+)and K^(+).What’s more,ZnFC-PA/PSF worked well in the fixed-bed adsorption(E=91.92%),indicating the application potential for the hazardous Cs^(+)removal from wastewater.

关键词： Adsorption Cesium Metal ferrocyanide Composite adsorbent

Aboveground net primary productivity and soil respiration display different responses to precipitation changes in desert grassland

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Journal of Plant Ecology 2022年第1期15卷 57-70页

作者： Lihua Zhang Junfeng Wang Ruifeng Zhao yafei guo Lianyi Hao College of Geography and Environment Science Northwest Normal University967 Anning East RoadLanzhou 730070China

Precipitation(PPT)changes affect both aboveground vegetation dynamics and belowground carbon cycling processes,particularly in arid and semiarid ***,it remains unclear how extreme PPT variation can affect soil carbon sequestration potential.A 3-year PPT manipulation experiment with five levels(±40%,±20%and ambient PPT)was conducted in a desert grassland of western Loess *** net primary productivity(ANPP)and soil respiration(Rs)were measured to examine whether the responses of ANPP and Rs to PPT changes displayed a double asymmetry *** ANPP was more sensitive to extreme drought than extreme wet treatments in wet and dry years,which displayed a negative asymmetric *** change in ANPP was mainly due to the direct effect of PPT change,and plant density variation also exerted some influence in the dry *** contrast,Rs displayed a positive asymmetry response to PPT change in dry *** may be ascribed to enhanced autotrophic respiration due to the enhanced positive responses of plant growth and ANPP to wet treatments as well as stronger birch effect of rainfall events on heterotrophic *** saturating response of Rs to extreme drought(−40%PPT treatment)was also found in the dry ***,the response of Rs to PPT change displayed a negative asymmetry model in wet *** contrasting models for ANPP and Rs in response to altered PPT regime suggest that extreme wet or dry treatments may increase soil C pools effluxes toward debt in this desert grassland.

关键词： primary production plant growth soil respiration soil carbon balance extreme precipitation desert grassland asymmetry response

Antimony speciation at the sediment-water interface of the Poyang Lake: response to seasonal variation

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Journal of Oceanology and Limnology 2018年第6期36卷 1941-1949页

作者： YU Xiaoping guo yafei DENG Tianlong Tianjin Key Laboratory of Marine Resources and Chemistry College of Chemical Engineering and Materials ScienceTianjin University of Science and Technology College of Chemistry and Materials Science Northwest University

In order to identify the effects of seasonal variation on the migration and transformation of antimony species at the sediment-water interface of the Poyang Lake, the largest fresh lake in China, a simulation study was carried out in the laboratory. Antimony species including antimonite Sb(III), antimonate Sb(V) and the fraction of organic forms(Sb-org) in overlying water at different temperatures were regularly measured during the simulation period. Different bound antimony forms in sediments were also determined along with the different antimony species in porewaters after the simulation terminated. The results indicated that temperature change during seasonal alternation plays an important role in the migration and transformation behavior of antimony at the sediment-water interface of the Poyang Lake. Antimony species both in porewaters and overlying water were sensitive to the variation of temperature, especially the Sb-org species. Antimony migrates from porewaters to the overlying water when the temperature decreases, and meanwhile the equilibrium between Sb(III) and Sb(V) in porewaters shifts toward Sb(V) when the temperature increases during seasonal alternation. Although temperature had less influence on the antimony species in sediments than in porewaters or in the overlying water, the average content of each antimony species in sediments increased with the decrease of temperature, suggesting that the decrease of temperature causes enrichment of antimony in the sediment.

关键词： geochemistry antimony species seasonal variation Poyang Lake

Thermal Characteristics of Room Temperature Inorganic Phase Change System Containing Calcium Chloride

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Chemical Research in Chinese Universities 2015年第3期31卷 452-456页

作者： GAO Daolin guo yafei YU Xiaoping WANG Shiqiang DENG Tianlong Tianjin Key Laboratory of Marine Resources and Chemistry College of Marine Science and EngineeringTianjin University of Science and Technology Tianjin 300457 P.R.China

A novel inorganic calcium-based phase change material（PCM-Ca） consisted of 47.1%（mass fraction） water, 47.7% calcium chloride, 2% potassium nitrate, 2% potassium bromide and 1.2% strontium chloride with a solid-liquid phase change temperature of 21.4 ℃ was investigated systematically. Among the components of PCM-Ca, calcium chloride and water act as the latent heat storage materials, and potassium nitrate, potassium bromide and strontium chloride work as the modifier, thickener and nucleating agent, respectively. Thermochemical properties including melting point, latent heat, density and thermal conductivity of the PCM-Ca were measured experimentally. The experimental results indicate that the melting latent heat, thermal conductivity at the melting point and density at room temperature for the PCM-Ca are 203.3 kJ/kg, 1.3637 W·m-1·K-l and 1.55×103 kg/m3, respectively. Moreover, a thirty-run-cycling test showed that the PCM-Ca has a good thermal characteristic with no phase segregation or supercooling, and the maximum deviations of latent heat and phase change temperature are only 0.2% and 1.6%, respectively.

关键词： Phase change material Calcium chloride Latent heat Thermal conductivity

Simulation studies on metastable phase equilibria in the aqueous ternary systems (NaCl-MgCl_(2)-H_(2)O) and (KCl-MgCl_(2)-H_(2)O) at 308.15K

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Frontiers of Chemical Science and Engineering 2009年第2期3卷 172-175页

作者： Tianlong DENG Baojun ZHANG Dongchan LI yafei guo Key Laboratory of Salt Lake Resources and Chemistry Qinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China College of Materials Chemistry and Chemical EngineeringChengdu University of TechnologyChengdu 610059China

The solubilities and densities of the aqueous metastable ternary systems(NaCl-MgCl_(2)-H_(2)O)and(KCl-MgCl_(2)-H_(2)O)at 308.15 K were determined by the isothermal evaporation *** the basis of the experimental results,the phase diagrams for those systems were *** was found that the former system belongs to the hydrate-I type with one invariant point of(NaCl+MgCl_(2)·6H_(2)O),two univariant curves,and two crystal-lization regions corresponding to halite(NaCl)and bischofite(MgCl_(2)·6H_(2)O);and the latter system belongs to the type of incongruent-double salts with two invariant points of(KCl+KCl·MgCl_(2)·6H_(2)O)and(MgCl_(2)·6H_(2)O+KCl·MgCl_(2)·6H_(2)O),three univariant curves,and three crystallization regions corresponding to potassium chlor-ide(KCl),carnallite(KCl·MgCl_(2)·6H_(2)O)and bischofite(MgCl_(2)·6H_(2).No solid solutions were found in both systems.

关键词： green chemistry solar pond technique simu-lation metastable phase equilibrium solubility

Silver-catalyzed bioleaching for raw low-grade copper sulphide ores

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Frontiers of Chemical Science and Engineering 2009年第3期3卷 250-254页

作者： Tianlong DENG yafei guo Mengxia LIAO Dongchan LI College of Materials Chemistry and Chemical EngineeringChengdu University of TechnologyChengdu 610059China Qinghai Institute of Salt Lakes Chinese Academy of SciencesXining 810008China

This research was conducted to investigate the biooxidation and copper dissolution from raw low-grade refractory copper sulphide ores located in the Xinjiang Autonomous Region of China using adapted Thiobacillus ferrooxidans *** order to accelerate the bioleach-ing rate,the adapted mixed bacteria and silver ion catalyst were tested in the leach columns at laboratory *** overall acid consumption was 4.3kg sulphuric acid per kg of dissolved copper and was linearly related to the percent copper *** calculated copper dissolution rates obey the Shrinking Core *** relative activation energy of the whole biooxidative leaching stages was calculated to be 48.58kJ/mol.

关键词： green process biohydrometallurgy bioleach-ing reaction kinetics sulphide ores