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Spatiotemporal variations of ecosystem services and driving factors in the Tianchi Bogda Peak Natural Reserve of Xinjiang,China

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Journal of Arid Land 2024年第6期16卷 816-833页

作者： ZHU Haiqiang WANG Jinlong TANG Junhu DING Zhaolong gong lu Key Laboratory of Sustainable Development of Xingjiang's Historical and Cultural Tourism Xinjiang UniversityUrumqi 830046China College of Tourism Xinjiang UniversityUrumqi 830046China Ecological Postdoctoral Research Station Xinjiang UniversityUrumqi 830046China College of Ecology and Environment Xinjiang UniversityUrumqi 830017China

Nature reserves play a significant role in providing ecosystem services and are key sites for biodiversity *** Tianchi Bogda Peak Natural Reserve(TBPNR),located in Xinjiang Uygur Autonomous Region,China,is an important ecological barrier area in the temperate arid *** evaluation of its important ecosystem services is of great significance to improve the management level and ecological protection efficiency of the *** the present study,we assessed the spatiotemporal variations of four ecosystem services(including net primary productivity(NPP),water yield,soil conservation,and habitat quality)in the TBPNR from 2000 to 2020 based on the environmental and social data using the Integrated Valuation of Ecosystem Services and Trade-offs(InVEST)*** addition,the coldspot and hotspot areas of ecosystem services were identified by hotspot analysis,and the trade-off and synergistic relationships between ecosystem services were analyzed using factor analysis in a geographic *** the study period,NPP and soil conservation values in the reserve increased by 48.20%and 25.56%,respectively;conversely,water yield decreased by 16.56%,and there was no significant change in habitat ***,both NPP and habitat quality values were higher in the northern part and lower in the southern part,whereas water yield showed an opposite *** analysis revealed that NPP showed a synergistic relationship with habitat quality and soil conservation,and exhibited a trade-off relationship with water *** yield and habitat quality also had a trade-off *** and habitat quality were affected by annual average temperature and Normalized Difference Vegetation Index(NDVI),respectively,while water yield and soil conservation were more affected by digital elevation model(DEM).Therefore,attention should be paid to the spatial distribution and dynamics of trade-off and synergistic relationships between ecosystem services in future ec

关键词： net primary productivity(NPP) water yield soil conservation habitat quality Integrated Valuation of Ecosystem Services and Trade-offs(InVEST)model geographic detector Tianchi Bogda Peak Natural Reserve

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Spatiotemporal variation and correlation of soil enzyme activities and soil physicochemical properties in canopy gaps of the Tianshan Mountains,Northwest China

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Journal of Arid Land 2022年第7期14卷 824-836页

作者： ABAY Peryzat gong lu CHEN Xin luO Yan WU Xue College of Ecology and Environment Xinjiang UniversityUrumqi 830017China Key Laboratory of Oasis Ecology Ministry of EducationUrumqi 830017China College of Resources and Environmental China Agricultural UniversityBeijing 100083China

The study of the heterogeneity of soil enzyme activities at different sampling locations in canopy gaps will help understand the influence mechanism of canopy gaps on soil ecological *** this paper,we analyzed the spatiotemporal variation of soil enzyme activities and soil physicochemical properties at different sampling locations(closed canopy,expanded edge,canopy edge,gap center)in different sampling time(December,February,April,June,August,and October)on the northern slope of the Tianshan Mountains,Northwest *** results showed that soil catalase,cellulase,sucrase,and acid phosphatase activities were relatively high from June to October and low from December to April,and most of soil enzyme activities were higher at closed canopy than at gap *** urease activity was high during *** soil temperature reached the highest value during June-August and was relatively high at gap center in October,December,and *** water content was significantly higher in December and April than in other *** bulk density was higher at gap center than at closed canopy in *** pH and soil electrical conductivity in most months were higher at closed canopy than at gap *** organic carbon,soil total nitrogen,and soil total phosphorus were generally higher at gap center than at closed ***,sampling time played a leading role in the dynamic change of soil enzyme *** key factors affecting soil enzyme activity were soil temperature and soil water content,which were governed by canopy *** results provide important support for further understanding the influence mechanism of forest ecosystem management and conservation on the Tianshan Mountains.

关键词： soil enzyme activity soil physicochemical property spatiotemporal variation canopy gap Tianshan Mountains

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Synthesis and characterization of superhydrophobic magnesium oxysulfate whiskers

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Particuology 2023年第7期78卷 111-121页

作者： Zhenying Yao lu gong Chunmei Zhu Xin Lian Bai He Shenghui Tian Bo Yui School of Chemistry and Chemical Engineering Chongqing University of Science and TechnologyChongqing401331China Provincial and Ministerial Co-Constructive of Collaborative Innovation Center for MSw Comprehensive Utilization School of Metallurgy and Materials EngineeringChongqing University of Science and TechnologyChongqing401331China

Superhydrophobic materials have attracted much attention for their special *** this *** oxysulfate(MOS)whiskers were surface modified by vinyltrimethoxysilane(VTMS)and prepared as superhydrophobic materials,which are expected to be widely used in self-cleaning,corro-sion prevention,and oil-water *** factors of silane concentration,hydrolysis time,reaction temperature,and reaction time were *** superhydrophobic Mos whiskers were *** and XRD turned out that there were no apparent changes in the morphology and crystalli-zation behavior of whiskers before and after modification,while the surface was uniformly coated with a layer of non-crystal material,and the surface of the whiskers employed a chemical bond Si-O-Mg covalently *** thermogravimetric analysis ultimately demonstrated that surface modification was beneficial to the improvement of the thermal stability of MoS *** MoS whiskers showed good compatibility with organic solvents through oil-water separation experiments,and demonstrated excellent self-cleaning *** methodology for the surface treatment of Mos whiskers to prepare superhydrophobic whiskers in this work may be extended for other whiskers or fillers,which may be promising for the preparation of superhydrophobic materials.

关键词： Magnesium oxysulfate whiskers Surface modification Vinyltrimethoxysilane Superhydrophobicity

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Arginine promotes myogenic differentiation and myotube formation through the elevation of cytoplasmic calcium concentration

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Animal Nutrition 2021年第4期7卷 1115-1123页

作者： lu gong Xin Zhang Kai Qiu Linjuan He Yubo Wang Jingdong Yin State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityBeijing100193China

This study aimed to explore the mechanism underlying arginine-promoted myogenesis of myoblasts.C2C12 cells were cultured with a medium containing 0.1,0.4,0.8,or 1.2 mmol/L arginine,*** proliferation,viability,differentiation indexes,cytoplasmic Ca^(2+)concentration,and relative mRNA expression levels of myogenic regulatory factors(MRF)and key Ca2+channels were measured in the absence or presence of 2 chemical inhibitors,dantrolene(DAN,10μmol/L)and nisoldipine(NIS,10μmol/L),*** demonstrated that arginine promoted myogenic differentiation and myotube *** with the control(0.4 mmol/L arginine),1.2 mmol/L arginine upregulated the relative mRNA expression levels of myogenin(MyoG)and Myomaker at d 2 during myogenic induction(Pluding the type 1 ryanodine recepto r(RyR1)and voltage-gated Ca^(2+)channel(Cav1.1)were upregulated by 1.2 mmol/L arginine during2-d myogenic induction(Plular and sarcoplasmic reticulum Ca^(2+).

关键词： Arginine Myogenic differentiation Cytoplasmic calcium concentration Myoblasts Myotube formation

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Does season regulate heterochronous leaf growth?Mechanisms of petiole-lamina trade-offs in broad-leaved woody plants of the Tianshan Mountains

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Plant Diversity 2024年第6期46卷 755-765页

作者： Wenjie Guo lu gong Yan luo Qian Guo School of Ecology and Environment Xinjiang UniversityWulumuqi830017China

As the core of leaf functional traits,the trade-off relationship between the petiole and lamina expresses the plant's adaptability to the environment in terms of support structure and *** investigated the proportions of allometric growth in the relationship between the petiole and the lamina of broadleaf woody plants in temperate highland Tianshan Mountains montane forests through three dimensions(length,area,and mass),including the length of the lamina(LL)and the length of the petiole(PL),and the area of the lamina(LA)and petiole cross sectional area(PCA)versus the mass of the lamina(LM)and the mass of the petiole(PM),as well as exploring the characteristics of the variance in response to seasonal *** found that the functional traits in all three dimensions showed a clear convergent evolution as the seasons progressed,that is,a“seasonal effect”of increasing and then *** effect of the petioleelamina relationship under spring was minimal in the area dimension;the effects of the threeedimensional relationships of the traits were all highest in summer,and the effect of the petioleelamina relationship was lower in *** also found that petiole traits are simultaneously and multiply affected by lamina traits,with LA and LM having additional effects on the length/mass and area dimensions,*** to tree species,shrub species significantly require more light intensity and support ***-leaved plants would invest more in photoluminescence,increasing leaf light capture efficiency and static load and dynamic *** results suggest that plants have rather complex trade-off mechanisms at the leaf level influencing their ability to adapt to the environment,emphasize the need for leaf-level studies on the relationships between functional traits in plants,and illustrate the importance of the season as a distinct time scale for plant trade-off mechanisms.

关键词： Allometric relationship Functional traits Leaf Season

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Development of Novel Visual-Plus Quantitative Analysis Systems for Studying DNA Double-Strand Break Repairs in Zebrafish

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Journal of Genetics and Genomics 2012年第9期39卷 489-502页

作者： Jingang Liu lu gong Changqing Chang Cong Liu Jinrong Peng Jun Chen College of Life Sciences Zhejiang University 866 Yu Hang Tang Road Hangzhou 310058 China College of Animal Sciences Zhejiang University 866 Yu Hang Tang Road Hangzhou 310058 China Developmental and Stem Cell Institute West China Second University Hospital Sichuan University Chengdu 610041 China

The use of reporter systems to analyze DNA double-strand break（DSB） repairs,based on the enhanced green fluorescent protein （EGFP） and meganuclease such as I-Sce I,is usually carried out with cell *** this study,we developed three visual-plus quantitative assay systems for homologous recombination（HR）,non-homologous end joining（NHEJ） and single-strand annealing（SSA） DSB repair pathways at the organismal level in zebrafish *** initiate DNA DSB repair,we used two I-Sce I recognition sites in opposite orientation rather than the usual single *** NHEJ,HR and SSA repair pathways were separately triggered by the injection of three corresponding I-Sce I-cut constructions,and the repair of DNA lesion caused by l-Sce I could be tracked by EGFP expression in the *** from monitoring the intensity of green fluorescence,the repair frequencies could also be precisely measured by quantitative real-time polymerase chain reaction（qPCR）.Analysis of DNA sequences at the DSB sites showed that NHEJ was predominant among these three repair pathways in zebrafish ***,while HR and SSA reporter systems could be effectively decreased by the knockdown of rad51 and rad52,respectively,NHEJ could only be impaired by the knockdown of ligaseIV（lig4） when the NHEJ construct was cut by I-Sce I in *** interestingly,blocking NHEJ with lig4-MO increased the frequency of HR,but decreased the frequency of *** studies demonstrate that the major mechanisms used to repair DNA DSBs are conserved from zebrafish to mammal,and zebrafish provides an excellent model for studying and manipulating DNA DSB repair at the organismal level.

关键词： DNA DSB repair NHEJ HR SSA I-Sce I Zebrafish

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Multi-wavelength Study of HESS J1303-631 with 14 yr of Fermi-LAT Data

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Research in Astronomy and Astrophysics 2023年第10期23卷 201-209页

作者： Lian-Cheng Zhou Qi Xia Shi-Ting Tian Yun-lu gong Jun Fang Department of Astronomy Yunnan UniversityKunming 650091China

HESS J1303-631 is an extended TeV pulsar wind nebula powered by the pulsar PSR J1301-6305 detected with the High Energy Stereoscopic System. We present an analysis of the GeV γ-ray region of HESS J1303-631 with about14 yr of Fermi Large Area Telescope data. The GeV γ-ray emission, coincident with the very-high-energy source,has a photon index of 1.69 ± 0.09 in 10–500 GeV band, and the GeV morphology has an extension to the same direction as indicated in the TeV band. Moreover, the observed multi-wavelength spectral energy distribution of the nebula is studied with a one-zone time-dependent leptonic model, in which the electrons/positrons injected into the nebula are assumed to have a broken power-law spectrum. The result indicates that the multi-wavelength nonthermal emission can be well reproduced via synchrotron radiation and inverse Compton scattering of the particles.

关键词： ISM:supernova remnants radiation mechanisms:non-thermal ISM:general

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Anomalous Wtb Couplings and b→sγin the Topcolor Assisted Technicolor Models

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Chinese Physics Letters 2001年第3期18卷 349-351页

作者： YUE Chong-Xing lu gong-Ru LI Wei-Bin College of Physics and Information Engineering He’nan Normal UniversityXinxiang 453002

Using the topcolor-assisted technicolor models,we give the anomalous Wtb couplings arising from the exchange of the new gauge bosons(ETC gauge boson,colorons and Z')and calculate their contributions to the b→sγbranching *** find that the contributions mainly come from colorons and the recent measured value of the b→sγbranching ratio gives a strong constraint on the masses of colorons.

关键词： gauge branching constraint

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Structures and Properties of 1,2,3-Triazoles and 1,2,4-Triazoles

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Chinese Journal of Structural Chemistry 2006年第5期25卷 582-588页

作者： lu Ya-Lin gong Xue-Dong JU Xue-Hai JI Guang-Fu XIAO He-Ming School of Chemical Engineering Nanjing University of Science and Technology Nanjing 210094 China

In this paper, the fully optimized molecular geometries and electronic structures of six 1,2,3- and 1,2,4-triazoles were calculated using density functional theory B3LYP/6-311G^＊＊ method. The salvation energies were obtained by SCRF in THF. The results show that the total energies of F are the lowest both in gas and liquid phases, and the order of thermodynamic stabilities of the title compounds is F〉D〉C〉B〉E〉A. Their frontier orbital energy gaps and electron delocalization also support that F is the most stable. All the computed conclusions are in good agreement with the experiments. Vibrational frequencies of the title compounds were computed. The thermodynamic properties and their temperature curves of six compounds were obtained by using the statistical thermodynamic method with the temperature ranging from 200 to 1000 K.

关键词： triazoles DFT stabilities IR thermodynamic properties

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Theoretical Studies on Intermolecular Interactions of 4-Amino-5-nitro-1,2,3-triazole Dimers

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Chinese Journal of Structural Chemistry 2006年第8期25卷 1004-1010页

作者： lu Ya-Lin gong Xue-Dong JU Xue-Hai MA Xiu-Fang XIAO He-Ming School of Chemical Engineering Nanjing Universityof Science and Technology Nanjing 210094 China

Seven optimized configurations and their electronic structures of 4-amino-5-nitro- 1,2,3-triazole dimers on their potential energy surface have been obtained by using density functional theory （DPT） method at the B3LYP/6-311＋＋G＊＊ level. The maximum intermolecular interaction energy is -35.42 kJ/mol via the basis set superposition error-correction （BSSE） and zero point energy-correction （ZPE）. Charge transfers between the two subsystems are small. The vibration analysis of optimized configurations was performed, and the thermodynamic property changes from monomer to dimer have been obtained with the temperature ranging from 200 to 800 K on the basis of statistical thermodynamics. It is found that the hydrogen bonds contribute to the dimers dominantly, and the extent of intermolecular interaction is mainly determined by the hydrogen bonds＇ strength rather than their number. The dimerization processes of Ⅳ, Ⅴand Ⅵ can occur spontaneously at 200 K.

关键词： 4-amino-5-nitro-1,2,3-triazole intermolecular interaction density functional theory thermodynamic properties

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