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Dynamics of the eco-environmental quality in response to land use changes in rapidly urbanizing areas: A case study of Wuhan, China from 2000 to 2018

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Journal of Geographical Sciences 2023年第2期33卷 245-265页

作者： hu can SONG Min ZHANG Anlu College of Land Management Huazhong Agricultural UniversityWuhan 430070China Sanford School of Public Policy Duke UniversityDurhamNC 27708USA School of Business Administration Zhongnan University of Economics and LawWuhan 430073China

The dramatic land use changes that occur in rapidly urbanized areas are important inducement to changes in the eco-environmental *** urban land use changes and their eco-environmental quality responses can provide theoretical support and a decision-making basis for sustainable and high-quality development in rapidly urbanizing *** Wuhan,China,as the study area,this paper extracts land use information using Landsat satellite remote sensing images and a support vector machine *** on this,a remote sensing-based ecological index evaluation model including humidity,greenness,dryness and heat is constructed to explore the changes in land use and their eco-environmental quality responses from 2000 to *** results show that(1)the structure,extent and spatial layout of land use in Wuhan from 2000 to 2018 have undergone tremendous changes under rapid urbanization,and the change of construction land is the greatest among all land use types;(2)the overall quality of eco-environment in Wuhan continues to improve as the scale of the improved eco-environment areas is greater than that of the deteriorated *** direction and magnitude of the impact of each indicator on the eco-environmental quality are different;(3)the improvement or deterioration of eco-environmental quality is closely related to the changes of different land use types within the study *** eco-environmental quality shows significant spatial heterogeneity,especially between the main urban areas and the suburban *** paper argues that reasonably adjusting the land use structure can serve to maintain or even improve the quality of the regional ***,this study puts forward suggestions for the coordinated development of land use and the eco-environment in rapidly urbanizing areas.

关键词： land use change eco-environmental quality remote sensing-based ecological index Wuhan China

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Current status of early gastric cancer screening research

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cancer Biology & Medicine 2024年第3期21卷 218-222页

作者： can hu Li Yuan Xiangdong Cheng Department of Gastric surgery Zhejiang Cancer HospitalHangzhou Institute of Medicine(HIM)Chinese Academy of SciencesHangzhouZhejiang 310022China Key Laboratory of Prevention Diagnosis and Therapy of Upper Gastrointestinal Cancer of Zhejiang ProvinceHangzhou 310022China Zhejiang Provincial Research Center for Upper Gastrointestinal Tract cancer Zhejiang Cancer HospitalHangzhou 310022China

Gastric cancer is a predominant threat to the health and well-being of China's residents. Data from the World Health Organization(WHO) in 2020 revealed that gastric cancer in China notably accounted for 44.0% of new c... 详细信息

关键词： cancer Gastric gastric

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Chromosomal localization of the major ribosomal RNA genes in scallop Chlamys farreri

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Acta Oceanologica Sinica 2006年第3期25卷 108-115页

作者： huANG Xiaoting BAO Zhenmin BI Ke hu Jingjie ZHANG can ZHANG Quanqi hu Xiaoli Laboratory of Marine Genetics and Breedings Division of Life Science and Technology Ocean University of China Qingdao 266003 China

The chromosomes of Chlamys farreri were analyzed by means of silver staining and fluorescence in situ hybridization （FISH） with 18S-28S rDNA probe. Probe was made by PCR amplification of a DNA fragment containing internal transcribed spacers ITS1 between 18S and 5.8S ribosomal RNA gene, ITS2 between 5.8S and 28S ribosomal RNA gene and 5.8S rRNA gene, and labeled by PCR incorporation of bio-16-dUTP. FISH signals were located on the short arm of subtelocentrie chromosome 10. After silverstaining, nucleolus organizer regions （NORs） could be observed on the telomere of the short arm of chromosome 10. However, one metaphase spread displayed an additional silver spot on the short arm of subtelocentrie chromosome 12.

关键词： rDNA Ag-NORs FISH Chlamysfarreri

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Detection and threshold-adaptive segmentation of farmland residual plastic film images based on CBAM-DBNet

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International Journal of Agricultural and Biological Engineering 2024年第5期17卷 231-238页

作者： Lijian Xiong can hu Xufeng Wang Hongbiao Wang Xiuying Tang Xingwang Wang College of Engineering China Agricultural UniversityBeijing 100083China Modern Agricultural Engineering Key Laboratory at the Universities of Education Department of Xinjiang Uygur Autonomous Region Tarim UniversityAlaer 843300China College of Mechanical and Electrical Engineering Tarim UniversityAlaer 843300China

Robust, accurate, and fast monitoring of residual plastic film (RPF) pollution in farmlands has great significance. Based on CBAM-DBNet, this study proposed a threshold-adaptive joint framework for identifying the RPF on farmland surfaces and estimating its coverage rate. UAV imaging was used to gather images of the RPF from several locations with various soil backgrounds. RPFs were manually labeled, and the degree of RPF pollution was defined based on the RPF coverage rate. Combining differentiable binarization network (DBNet) with the convolutional block attention module (CBAM), whose feature extraction module was improved. A dynamic adaptive binarization threshold formula was defined for segmenting the RPF’s approximate binary map. Regarding the RPF image detection branch, the CBAM-DBNet exhibited a precision (P) value of 85.81%, a recall (R) value of 82.69%, and an F1-score (F1) value of 84.22%, which was 1.09 percentage points higher than the DBNet in the comprehensive index F1 value. For the RPF image segmentation branch, using CBAM-DBNet to segment the RPF image combined with an adaptive binarization threshold formula. Subsequently, the mean absolute percentage error (MAPE), root mean square error (RMSE), and mean absolute error (MAE) of the prediction of RPF’s coverage rate were 0.276, 0.366, and 0.605, respectively, outperforming the DBNet and the Iterative Threshold method. This study provides a theoretical reference for the further development of evaluation technology for RPF pollution based on UAV imaging.

关键词： binarization threshold adaptive residual plastic film object detection image segmentation UAV remote sensing

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Construction of virtual mulch film model based on discrete element method and simulation of its physical mechanical properties

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International Journal of Agricultural and Biological Engineering 2020年第4期13卷 211-218页

作者： Wensong Guo can hu Xiaowei He Long Wang Shulin Hou Xufeng Wang College of Mechanical and Electrical Engineering Tarim UniversityAlar 843300XinjiangChina College of Engineering China Agricultural UniversityBeijing 100083China

In China,especially in Xinjiang Region,mulch film remaining in the soil has severely jeopardized the safety of soil *** numerically simulate the residual film-soil-recovery implementation system,a virtual mulch film model with consistent physical and mechanical properties with real mulch film needs to be *** this study,a flexible deformable virtual mulch film model was constructed using YADE software based on the Minkowski Sum principle and the ball-ball force-displacement constitutive rule,as well as the contact failure rule were *** deformation behaviors of cylinders and PFacet elements,such as stretching,bending,and torsion,were *** splicing the basic PFacet elements,a virtual mulch model was *** mechanical model of a virtual mulch film under tension was established and the axial tensile stiffness coefficient kn was determined to be 43.30 N·*** verify the physical and mechanical properties of this virtual mulch film,both real and virtual stretching and tearing tests were *** experimental results showed that:in the process of stretching and tearing of real and virtual films,the properties of morphological features of both are basically identical;however,they clearly differ in *** viscoelastic constitutive model between balls and yield judgment conditions requires further study.

关键词： discrete element method mulching film physical and mechanical properties virtual test

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Impact of agricultural residual plastic film on the growth and yield of drip-irrigated cotton in arid region of Xinjiang, China

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International Journal of Agricultural and Biological Engineering 2020年第1期13卷 160-169页

作者： can hu Xufeng Wang Shiguo Wang Bing Lu Wensong Guo Chaoji Liu Xiuying Tang College of Engineering China Agricultural UniversityBeijing 100083China College of Mechanical and Electrical Engineering Tarim UniversityAlar 843300XinjiangChina Xinjiang Academy of Agricultural and Reclamation Science Mechanical Equipment Research Institute Shihezi 832000China

Long-term and widespread use of plastic mulching has led to the accumulation of residual plastic film(RPF)in farmland soils of Xinjiang,***,there is no specific quantitative basis for RPF pollution or a clear understanding of the influence of residual film on crop *** aim of this study was to investigate the effect of RPF on the growth of cotton,an important cash crop of *** on the field conditions and previous reports,various amount of residual film was applied in 0-30 cm soil *** growth index including emergence rate,dry matter,and yield of cotton was examined at different growth stages under different soil residual film *** demonstrated a significant effect of RPF on soil moisture distribution and *** residues had a significant effect on cotton growth at levels above 200 kg/hm2,and the yield decreased as the RPF amount *** on these findings,200 kg/hm2 was suggested as a threshold level to determine the effects of RPF on *** study provided a basis to rate RPF pollution in farmland soils and help understand the impact of pollution on crop productivity.

关键词： residual plastic film plastic film pollution soil pollution pollution control cotton production management

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Separation and mechanical properties of residual film and soil

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International Journal of Agricultural and Biological Engineering 2023年第1期16卷 184-192页

作者： Yu Ren Wensong Guo Xufeng Wang can hu Long Wang Xiaowei He Jianfei Xing College of Mechanical and Electrical Engineering Tarim UniversityAlar 843300XinjiangChina Modern Agricultural Engineering Key Laboratory at Universities of Education Department of Xinjiang Uygur Autonomous Region Tarim UniversityAlar 843300XinjiangChina

In Xinjiang's perennial cotton(Gossypium hirsutum)-planting soil,the average residual amount of plastic film is as high as 265.3 kg/hm2,and the problem of pollution with residual plastic film in the tillage layer has become a major *** explore the mechanism of the separation of residual film and soil in the tillage layer and determine the conditions favorable for the separation of residual film-soil,this study established a constitutive model of residual film-soil contact based on the discrete element method and used the established constitutive model to simulate the process of separating residual film and *** addition,the influence of parameters,such as soil particle size and water content,on the force to separate the residual film and soil was studied using single factor and orthogonal *** simulation results showed that the changing trend of the residual film-soil separation force curve did not differ much between the simulation and the actual comparison,and the curves were roughly the *** all decreased after the separation force reached its peak value,but the simulated separation force curve was similar to that of the actual separation *** increased rapidly from the beginning and reached peak separation force *** single-factor experiment showed that the separation force of the used residual mulching film was higher than that of the unused mulching *** the same conditions,the maximum separation force required to separate the residual membrane was proportional to the positive pressure on the surface of the residual membrane and the size of soil *** the same conditions,the maximum separation force required to separate the residual film is proportional to the positive pressure on the surface of the residual film and the size of soil *** maximum separation force decreased first and then increased as the soil moisture content *** results of the orthogonal experiment showed that the soil part

关键词： residual mulching film soil separation discrete element simulation sandy soil

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The role of reactive oxygen species in gastric cancer

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cancer Biology & Medicine 2024年第9期21卷 740-753页

作者： Yuqi Wang Jingli Xu Zhenjie Fu Ruolan Zhang Weiwei Zhu Qianyu Zhao Ping Wang can hu Xiangdong Cheng College of Pharmaceutical Sciences Zhejiang University of TechnologyHangzhou 310014China Department of Gastric Surgery Zhejiang Cancer HospitalHangzhou 310022China Key Laboratory of Prevention Diagnosis and Therapy of Upper Gastrointestinal Cancer of Zhejiang ProvinceHangzhou 310022China Zhejiang Provincial Research Center for Upper Gastrointestinal Tract cancer Zhejiang Cancer HospitalHangzhou 310022China

Gastric cancer(GC)ranks fifth in cancer incidence and fourth in cancer-related mortality *** oxygen species(ROS)are highly oxidative oxygen-derived products that have crucial roles in cell signaling regulation and maintaining internal *** are closely associated with the occurrence,development,and treatment of *** review summarizes recent findings on the sources of ROS and the bidirectional regulatory effects on GC and discusses various treatment modalities for GC that are related to ROS *** addition,the regulation of ROS by natural small molecule compounds with the highest potential for development and applications in anti-GC research is *** aim of the review is to accelerate the clinical application of modulating ROS levels as a therapeutic strategy for GC.

关键词： Gastric cancer reactive oxygen species ROSantitumor therapy natural products pharmacology

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Matrine attenuates oxidative stress and cardiomyocyte apoptosis in doxorubicin-induced cardiotoxicity via maintaining AMPKα/UCP2 pathway

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Acta Pharmaceutica Sinica B 2019年第4期9卷 690-701页

作者： can hu Xin Zhang Wenying Wei Ning Zhang Haiming Wu Zhenguo Ma Lingli Li Wei Deng Qizhu Tang Department of Cardiology Renmin Hospital of Wuhan UniversityWuhan 430060China Cardiovascular Research Institute of Wuhan University Wuhan 430060China hubei Key Laboratory of Cardiology Wuhan 430060China

Oxidative stress and cardiomyocyte apoptosis are involved in the pathogenesis of doxorubicin(DOX)-induced cardiotoxicity. Matrine is well-known for its powerful anti-oxidant and anti-apoptotic capacities. Our present study aimed to investigate the effect of matrine on DOX-induced cardiotoxicity and try to unearth the underlying mechanisms. Mice were exposed with DOX to generate DOX-induced cardiotoxicity or normal saline as control. H9 C2 cells were used to verify the effect of matrine in *** injection triggered increased generation of reactive oxygen species(ROS) and excessive cardiomyocyte apoptosis, which were significantly mitigated by matrine. Mechanistically, we found that matrine ameliorated DOX-induced uncoupling protein 2(UCP2) downregulation, and UCP2 inhibition bygenipin could blunt the protective effect of matrine on DOX-induced oxidative stress and cardiomyocyte apoptosis. Besides, 50-AMP-activated protein kinase α2(Ampkα2) deficiency inhibited matrine-mediated UCP2 preservation and abolished the beneficial effect of matrine in mice. Besides, we observed that matrine incubation alleviated DOX-induced H9 C2 cells apoptosis and oxidative stress level via activating AMPKα/UCP2, which were blunted by either AMPKα or UCP2 inhibition with genetic or pharmacological methods. Matrine attenuated oxidative stress and cardiomyocyte apoptosis in DOX-induced cardiotoxicity via maintaining AMPKα/UCP2 pathway, and it might be a promising therapeutic agent for the treatment of DOX-induced cardiotoxicity.

关键词： Matrine Oxidative stress Apoptosis AMPKα UCP2

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Distribution of microplastics in mulched soil in Xinjiang, China

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International Journal of Agricultural and Biological Engineering 2021年第2期14卷 196-204页

作者： can hu Bing Lu Wensong Guo Xiuying Tang Xufeng Wang Yinghao Xue Long Wang Xiaowei He College of Mechanical and Electrical Engineering Tarim UniversityAlar 843300XinjiangChina College of Engineering China Agricultural UniversityBeijing 100083China Rural Energy and Environment Agency Ministry of Agriculture and Rural AffairsBeijing 100125China

In order to study the distribution of soil microplastics in the plastic film mulched farmland,the fluidization-centrifugation secondary density flotation method was optimized and improved to obtain the *** main components of microplastics were analyzed by Fourier spectrometer,and the surface morphology,porosity,particle size and abundance distribution characteristics of microplastics were studied by electron *** results showed that plastic mulch is the main source of *** morphology mainly consists of fragments,fibers and *** size of debris microplastics was larger,with an average of 1.6300 mm,mainly distributed in the 0-300 mm cultivation layer while the size of particle micro plastic was smaller,with an average of 0.1400 *** width of fiber microplastic was 5-20μm,but the length could reach 0.2000-2.0000 mm,with an average particle size of 0.9200 *** and granular microplastics could be seen in each soil *** surface layer of microplastics has a large number of pores characterized with a length of 50μm and a width of about 5-10μm,which might be an easy oxidation site for *** oxidation is continuous,making microplastics continuously decompose into smaller *** abundance of microplastics is negatively correlated with soil *** average abundance of microplastics is 161.50±5.20 pieces/100 g in 0-300 mm soil layer,which is their main enrichment ***,the average abundance of microplastics decreases to 11.20±1.10 pieces/100 g in 400-800 mm soil ***,the average particle size of microplastics is also linearly negatively correlated with soil *** with smaller particle size are easier to migrate as they pass through soil pores under the action of water and *** research can provide s reference for understanding plastic mulch pollution.

关键词： soil microplastics plastic pollution distribution composition

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