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Marginal land in China suitable for bioenergy crops under diverse socioeconomic and climate scenarios from 2.2. to 2.00

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Big Earth Data 2024年第3期8卷 566-586页

作者： Jingying Fu Qiang gao Gang Lin Dong Jiang Yanan zhao Shuang Lue Institute of Geographic sciences and Natural Resources Research Chinese Academy of SciencesBeijingChina college of Resources and Environment University of Chinese Academy of SciencesBeijingChina Key Laboratory of Coupling Processes and Effects of Natural Resource Elements Ministry of Natural ResourcesBeijingChina Key Laboratory of Carrying Capacity Assessment for Resource and Environment Ministry of Natural ResourcesBeijingChina college of Geoscience and Surveying Engineering China University of Mining and Technology(Beijing)BeijingChina

Maximizing the development of renewable energy plays a critical role in mitigating the climate *** land provides space for the development of biomass energy;however,it remains unclear how the amount and spatial distribution of marginal land that is suitable for energy crop development will change in the ***,we project energy marginal land changes in China following the shared socioeconomic pathway(SSP)and/or repre-sentative concentration path(RCP).We provide datasets of mar-ginal land,agriculturally suitable land,and potentially suitable for energy crops under historical scenarios and six future scenarios(***1-1.9,SSP1-2.6,SSP4-3.4,SSP2.4.5,SSP4-6.0,and SSP3-7.0)for the period 2.2.-2.00,with a spatial resolution of 5 *** the six scenarios,from 2.2.-2.00,the area of suitable marginal land ranged from 1.90-16.2.(Jatropha curcas L.)to 37.37-73.97(Panicum virgatum L.)(×10^(4)km^(2.),depending on the choice of energy crops and climate *** on the growing suitability of eight important bioenergy crops-Ricinus communis L.,Saccharum officinarum L.,Pistacia chinensis Bunge,Panicum virga-tum L.,Jatropha curcas L.,Miscanthus giganteus J.,Manihot esculenta Crantz,and Sorghum bicolor Moench-our dataset can be used to identify suitable locations for specific energy *** new syn-thetic dataset could support the development of multiscenariobased solutions related to carbon neutrality,ecosystem services,and energy transition.

关键词： Marginal land climate change energy crops liquid fuel

Effects of thinning and understory removal on water use efficiency of Pinus massoniana:evidence from photosynthetic capacity and stable carbon isotope analyses

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Journal of Forestry Research 2024年第2期35卷 42-53页

作者： Ting Wang Qing xu Beibei Zhang Deqiang gao Ying Zhang Jing Jiang Haijun Zuo Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration Ecology and Nature Conservation InstituteChinese Academy of ForestryBeijing 100091People’s Republic of China college of Agronomy and agricultural Engineering Liaocheng UniversityLiaocheng 252000People’s Republic of China Department of Forest and Conservation sciences Faculty of ForestryUniversity of British ColumbiaVancouverBC V6T 1Z4Canada

Understanding the relationship between forest management and water use efficiency(WUE)is important for evaluating forest adaptability to climate ***,the effects of thinning and understory removal on WUE and its key controlling processes are not well understood,which limits our comprehension of the physiological mechanisms of various management *** this study,four forest management measures(no thinning:NT;understory removal:UR;light thinning:LT;and heavy thinning:HT)were carried out in Pinus massoniana plantations in a subtropical region of *** capacity and needle stable carbon isotope composition(δ^(13)C)were measured to assess instantaneous water use efficiency(WUE_(inst))and long-term water use efficiency(WUE_(i)).Multiple regression models and structural equation modelling(SEM)identified the effects of soil properties and physiological performances on WUE_(inst)and WUE_(i).The results show that WUE_(inst)values among the four treatments were ***,compared with the NT stand(35.8μmol·mol^(-1)),WUE_(i)values significantly increased to 41.7μmol·mol^(-1)in the UR,50.1μmol·mol^(-1)in the LT and 46.6μmol·mol^(-1)in HT treatments,largely explained by photosynthetic capacity and soil water *** removal did not change physiological performance(needle water potential and photosynthetic capacity).Thinning increased the net photosynthetic rate(A_n)but not stomatal conductance(g_s)or predawn needle water potential(ψ_(pd)),implying that the improvement in water use efficiency for thinned stands was largely driven by radiation interception than by soil water *** general,thinning may be an appropriate management measure to promote *** WUE to cope with seasonal droughts under future extreme climates.

关键词： Stable carbon isotope Water use efficiency Thinning Understory removal Photosynthetic capacity Needle water potential

Temperature field calculation of rail flash welding

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High-Speed Railway 2024年第2期2卷 116-121页

作者： Rui xu Min Zhang Zhenkun gao Guo {2. Wei Ding Shouming Wang Peng Zhang Xiang Liu Jingjing Li Material science&Engineering Research Center School of MechanicalElectronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China Institute of Metals and Chemistry China Academy of Railway Sciences Group Co.Ltd.Beijing 100081China Department of Industrial and Manufacturing Engineering Pennsylvania State UniversityUniversity ParkPA 16802USA

The forging stage of rail flash welding has a decisive influence on joint strength,and the study of the temperature distribution in the process has an important role in further improving joint *** this paper,three calculation methods for the temperature field are ***,the finite element model of the temperature field before forging rail flash welding is established by using the transient heat module of Ansys software and verified by infrared temperature ***,the temperature distribution of different parts of the rail before flash welding is obtained by using infrared thermal imaging ***,Matlab software is used to calculate the temperature of the non-measured ***,the temperature distribution function along the rail axis is fitted through the temperature measurement *** temperature distribution before the top forging of the rail flash welding can be used to analyze the joint and heat-affected zone organization and properties effectively and to guide the parameter setting and industrial production.

关键词： Flash welding Temperature field Joint strength Software calculation

The single nucleotide polymorphisms of chicken melanocortin-4 receptor(MC4R)gene and their association analysis with carcass traits

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science China(Life sciences) 2006年第6期49卷 560-566页

作者： QIU xuemei1,2.LI Ning1,DENG xuemei3,{2. Xingbo3,MENG Qingyong1 & WANG Xiuli2.1. State Key Laboratory for Agrobiotechnology,China agricultural {2.,beijing 100094,China 2. college of Life science and Technology,Dalian Fisheries {2.,Dalian,11602.,China 3. college of Animal science and Technology,China agricultural {2.,beijing 100094,China State Key Laboratory for Agrobiotechnology China Agricultural University Beijing 100094 China college of Life science and Technology Dalian Fisheries University Dalian 116023 China State Key Laboratory for Agrobiotechnology China Agricultural University Beijing 100094 China college of Animal science and Technology China Agricultural University Beijing 100094 China college of Life science and Technology Dalian Fisheries University Dalian 116023 China

Mutations of the melanocortin-4 receptor (MC4R) gene are associated with the appetite, obesity; growth in pig, mice; human. But little is known about the function of chicken MC4R gene. In this study, F2.chicken resource population derived from broilers crossing to Silky was screened for the polymorphisms of the MC4R gene using PCR-single strand conformation polymorphism (PCR-SSCP); DNA sequencing methods. Four single nucleotide polymorphisms (SNPs) sites were found. The mutation (C→T) in the 5′ regulation region of chicken MC4R gene results in one more NF-E2. cap transcription factor binding sites in the mutation allele than in the wild allele. One missense mutation (G→A) occurs in the coding region (61nt), which changes the glycine to arginine. Moreover, in the coding region there are 2.synonymous mutations, one G→T mutation at 315nt; one C→T mutation at 336nt. Least square analysis of the SNPs; carcass traits showed that BB, DD; FF genotypes are significantly associated with body weight, carcass weight (or half carcass weight),; leg muscle weight (P>0.05 or P>0.01). But no significant association between the genotypes; abdominal fat weight is found. The results present the evidence that the chicken MC4R gene can be selected as the major candidate gene for the carcass traits such as body weight; growth.

关键词： melanocortin-4 receptor, SNPs, chicken, carcass traits.

Quantitative estimation of the shrub canopy LAI from atmosphere-corrected HJ-1 CCD data in Mu Us Sandland

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science China Earth sciences 2010年第S1期53卷 26-33页

作者： CHEN Wei1,2.CAO ChunXiang1,HE QiSheng1,2.GUO HuaDong3,ZHANG Hao1,2.LI RenQiang4,ZHENG Sheng1,2.xu Min1,2.gao Mengxu1,2.zhao Jian1,2.LI Sha1,NI XiLiang1,2.JIA HuiCong1,JI Wei1,TIAN Rong1,2.LIU Cheng1,2.zhao YuXing5 & LI JingLu6 1 State Key Laboratory of Remote Sensing {2.,Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of {2.s and beijing Normal university,beijing 100101,China 2.Graduate university of Chinese Academy of {2.s,beijing 100049,China 3 Center for Earth Observation and Digital Earth,Chinese Academy of {2.s,beijing 100190,China 4 China Key Laboratory of Ecological Network Observation and Modeling,Institute of Geographical {2.s and Natural Resources Research,Chinese Academy of {2.s,beijing 100101,China 5 Ordos Forestry Sand Control {2. Institute,Dongsheng 017000,China 6 Inner Mongolia Biomass Thermoelectricity Limited Company,Wushen 017300,China 1. State Key Laboratory of Remote Sensing science Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University Beijing 100101 China 2. Graduate university of Chinese Academy of sciences Beijing 100049 China 3. Center for Earth Observation and Digital Earth Chinese Academy of Sciences Beijing 100190 China 4. China Key Laboratory of Ecological Network Observation and Modeling Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China 5. Ordos Forestry Sand Control science Institute Dongsheng 017000 China 6. Inner Mongolia Biomass Thermoelectricity Limited Company Wushen 017300 China

The leaf area index(LAI) is an important ecological parameter that characterizes the interface between vegetation canopy and the *** addition,it is used by most process-oriented ecosystem *** paper investigates the potential of HJ-1 CCD data combined with linear spectral unmixing and an inverted geometric-optical model for the retrieval of the shrub LAI in Wushen Banner of Inner Mongolia in the Mu Us ***(Moderate Resolution Atmospheric Radiance and Transmittance Model) was used for atmospheric *** was extracted using the threshold of the normalized difference vegetation index,with which water bodies and farmland were separated,in combination with a vegetation map of the People's Republic of China(1:1000000).Using the geometric-optical model,we derive the per-pixel reflectance as a simple linear combination of two components,namely sunlit background and *** fraction of sunlit background is related to the shrub *** the support of HJ-1 CCD data,we employ linear spectral unmixing to obtain the fraction of sunlit background in an atmospherically corrected HJ *** addition,we use the measured shrub canopy structural parameters for shrub communities to invert the geometric-optical model and retrieve the pixel-based shrub *** total,18 sample plots collected in Wushen Banner of Inner Mongolia are used for *** results of the shrub LAI show good agreement with R2.of 0.817 and a root-mean-squared error of 0.173.

关键词： shrub leaf area index inversion HJ-1 data geometric-optical model MODTRAN Mu Us Sandland

Exploring the material basis and mechanism of Moringa oleifera in alleviating slow transit constipation based on network pharmacology and animal models

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Food science and Human Wellness 2024年

作者： Sijin Li Xiaoyu gao Kaifeng Guo Shuangfeng Liu Weiqian yang Yan {2. Jun Sheng Zhongbin Bai yang Tian college of Food science and Technology， Yunnan {2. university Yunnan Key Laboratory of Precision Nutrition and Personalized Food Manufacturing， Yunnan agricultural university Department of science and Technology， Yunnan agricultural {2. college of Veterinary Medicine， Yunnan agricultural {2. Engineering Research Center of Development and Utilization of Food and Drug Homologous Resources， Ministry of Education， Yunnan agricultural university

Moringa oleifera(M. oleifera) have laxative effects， but their active compositions and mechanisms are not very clear thus far. To this end， we systematically explored the active components and mechanism of M. oleifera leaves in relieving constipation by using the slow transit constipation (STC) mouse model and network pharmacology. The results of animal experiments showed that M. oleifera aqueous extract (MOA) had good laxative activity， and its 70% alcohol soluble part (ASP) also showed significant laxative activity(P 1). Network pharmacological prediction results suggested that L-phenylalanine (Phe) was the key compound of ASP， and it might relieve constipation through tachykinin receptor 1 (TACR1) and three kinds of adrenergic receptors， including alpha-1a (ADRA1A)， alpha-2. (ADRA2.)， and alpha-2. (ADRA2.). Further animal experiment results showed that Phe significantly promoted gastrointestinal motility. Phe may relieve STC by enhancing the release of substance P (SP) and upregulating the mRNA expression of TACR1 in the ileum. Importantly， Phe may also promote intestinal movement by downregulating ADRA2. and ADRA2. and upregulating calmodulin and the mRNA and protein expression of myosin light chain 9 (MYL9) in the ileum， thereby activating the GPCR-MLC signaling pathway. These results lay a foundation for the application of M. oleifera and Phe in constipation.

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The Mechanism of Cube Texture Formation in Ni-7 at%W Substrate

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Journal of Wuhan university of Technology(Materials science) 2024年第5期39卷 1260-1269页

作者： zhao Congcong SUO Hongli JI Yaotang gao Mangmang MA Lin LIU Min School of Materials science and Engineering Beijing University of TechnologyBeijing 100124China college of Materials and New Energy Ningxia UniversityYinchuan 750021China

In order to obtain the sharp cube texture,a new process,the intermediate annealing rolling technique,has been introduced to prepare the Ni7W *** this paper,a cubic texture content up to 98.5%within 10°of the standard cubic orientation is obtained in the final substrate and the influence of this improved rolling technique on the cube texture formation has been *** results show that the increased cube texture in the Ni7W substrate is caused by the optimized deformation texture and the increased nucleated fraction of the cube grains.

关键词： cube texture coated conductor deformation texture recrystallization

Phase-engineering modulation of Mn-based oxide cathode for constructing super-stable sodium storage

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Journal of Energy Chemistry 2024年第1期88卷 421-427,I0010页

作者： Quanqing zhao Ruru Wang Ming gao Bolin Liu Jianfeng Jia Haishun Wu Youqi Zhu Chuanbao Cao Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education School of Chemistry and Materials ScienceShanxi Normal UniversityTaiyuan 030032ShanxiChina Metals and Chemistry Research Institute China Academy of Railway Sciences Corporation LimitedBeijing 100081China Research Center of Materials science Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green ApplicationsBeijing Institute of TechnologyBeijing 100081China

The Mn-based oxide cathode with enriched crystal phase structure and component diversity can provide the excellent chemistry structure for Na-ion ***,the broad application prospect is obstructed by the sluggish Na^(+)kinetics and the phase transitions upon ***,we establish the thermodynamically stable phase diagram of various Mn-based oxide composites precisely controlled by sodium content tailoring strategy coupling with co-doping and solid-state *** chemical environment of the P2.P'3 and P2.P3 biphasic composites indicate that the charge compensation mechanism stems from the cooperative contribution of anions and *** from the no phase transition to scavenge the structure strain,P2.P'3 electrode can deliver long cycling stability(capacity retention of 73.8%after 1000 cycles at 10 C)and outstanding rate properties(the discharge capacity of 84.08 mA h g^(-1)at 2. C)than P2.P3 ***,the DFT calculation demonstrates that the introducing novel P'3 phase can significantly regulate the Na^(+)reaction dynamics and modify the local electron configuration of *** effective phase engineering can provide a reference for designing other high-performance electrode materials for Na-ion batteries.

关键词： Sodium ion battery Oxide cathode Phase engineering Phase diagram Na~+kinetic

Early agricultural development and environmental effects in the Neolithic Longdong basin(eastern Gansu)

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Chinese science Bulletin 2011年第8期56卷 762-771页

作者： ZHOU XinYing LI XiaoQiang zhao KeLiang DODSON John SUN Nan yang Qing State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi'an 710075 China Laboratory of Human Evolution and Archeological science Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing 100044 China Graduate university of Chinese Academy of sciences Beifing 100049 China Institute for Environmental Research the Australian Nuclear Science and Technology Organization Sydney NSW 1001 Australia

Neolithic agricultural development and environmental effects in the Longdong area were reconstructed using a synthetic approach,investigating pollen,charcoal,and seed remains for two cultural layer sections and five flotation *** show that Neolithic agriculture in the Longdong area had a simple organization and was dominated by the production of common millet,especially in the early and middle yangshao *** the late yangshao age,Neolithic agriculture developed into a more complex structure,dominated by both common and foxtail millet and the cultivation of rice and *** production of foxtail millet gradually increased through the Neolithic period,reaching its highest point during the Qijia *** were first cultivated during the late yangshao culture,approximately 5000 cal a *** production began no later than 4800 cal a BP,and continued to exist in the Qijia culture,approximately 4000 cal a *** production in Neolithic Longdong,specifically in the "Yuan" area of the loess plateau,developed as a shrub and grass dominated *** in the river valleys was partly covered with Picea,Tusga,and Quercus coniferous and broadleaf mixed *** activity during the Neolithic period caused an increase in farmland on the loess tableland and a decrease in the abundance of shrub and grassland in the Longdong *** farmlands were abandoned,vegetation recovered with Hippophae-,Rosaceae-,Ephedra-,and Leguminosae-dominated shrublands and Artemisia-dominated grasslands.

关键词：新石器时代农业发展陇东地区环境影响甘肃东部早期新石器时期盆地