检索结果-南通市图书馆

Advances in Climate Change Research 2024年第2期15卷 285-296页

作者： Guo-An YIN Jing LUO fu-Jun NIU Ming-Hao LIU Ze-Yong GAO tian-Chun DONG Wei-Heng NI State Key Laboratory of Frozen Soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China China Railway Qinghai-Tibet Group Co. Ltd.Xining 810000China University of Chinese Academy of Sciences Beijing 100049China

The Qinghai-Tibet Plateau(QTP)has experienced rapid environmental changes,including climate warming and wetting,since the *** environmental changes significantly impact the shallow soil hydrothermal conditions,which have key roles in land-atmosphere feedback and ecosystem ***,the spatial variations and responses of soil hydrothermal conditions to environmental changes over the QTP with permafrost(PF)and seasonal frost(SF)remain *** this study,we investigated the spatial variations in soil temperature(ST)and soil moisture(SM)changes over the QTP from 2000 to 2020 using 99 in-situ sites with observations at 4 depths(i.e.10,40,100 and 200 cm).The main environmental controlling factors were further identified using a calibrated statistical *** showed that significant(pfuture environmental changes over the QTP.

关键词： Warming amd wetting Soil hydrothermal change Factor Permafrost Seasonal frost

Activation of skeletal carbohydrate-response element binding protein(ChREBP)-mediated de novo lipogenesis increases intramuscular fat content in chickens

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

Animal Nutrition 2024年第3期18卷 107-118页

作者： Peng Wang Haihan Xiao tian Wu Qinghua fu Xudong Song Yameng Zhao Yan Li Jieping Huang Ziyi Song Guangxi Key Laboratory of Animal Breeding Disease Control and PreventionCollege of Animal Science and TechnologyGuangxi UniversityNanningGuangxi 530004China

The intracellular lipids in muscle cells of farm animals play a crucial role in determining the overall intramuscular fat(IMF)content,which has a positive impact on meat ***,the mechanisms underlying the deposition of lipids in muscle cells of farm animals are not yet fully *** purpose of this study was to determine the roles of carbohydrate-response element binding protein(ChREBP)and fructose in IMF deposition of *** virus-mediated ChREBP overexpression in tibialis anterior(TA)muscle of chickens,seven 5-d-old male yellow-feather chickens were *** 10 d after virus injection,the chickens were slaughtered to obtain TA muscles for *** fructose administration trial,sixty 9-wk-old male yellow-feather chickens were randomly divided into 2 groups,with 6 replicates per group and 5 chickens per *** chickens were fed either a basal diet or a basal diet supplemented with 10%fructose(purity≥99%).At 4 wk later,the chickens were slaughtered,and breast and thigh muscles were collected for *** results showed that the skeletal ChREBP mRNA levels were positively associated with IMF content in multiple species,including the chickens,pigs,and mice(Pfurthermore,the lipidomics analysis revealed that ChREBP activation altered the lipid composition of chicken IMF and tented to improve the flavor profile of the *** conclusion,this study found that ChREBP plays a pivotal role in mediating the deposition of fat in chicken muscles in response to fructose-rich diets,which provides a novel strategy for improving meat quality in the livestock industry.

关键词： Chicken Meat quality Intramuscular fat Carbohydrate-response element binding protein Fructose

Stability mechanism and control of the pumpable supports in longwall recovery room

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

International Journal of Mining Science and Technology 2024年第7期34卷 957-974页

作者： Dong Zhang Jianbiao Bai Zhijun tian Zizheng Zhang Yonghong Guo Rui Wang Ying Xu Hao fu Shuai Yan Min Deng Shuaigang Liu State Key Laboratory of Coal Resources and Safe Mining China University of Mining and TechnologyXuzhou 221116China Key Laboratory of Xinjiang Coal Resources Green Mining Xinjiang Key Laboratory of Coal-bearing Resources Exploration and ExploitationXinjiang Engineering Research Center of Green Intelligent Coal MiningXinjiang Institute of EngineeringUrumqi 830023China Work Safety Key Laboratory on Prevention and Control of Gas and Roof Disasters for Southern Goal Mines Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal MinesHunan University of Science and TechnologyXiangtan 411201China School of Mines China University of Mining and TechnologyXuzhou 221116China

The load-bearing performance(LBP)of pumpable supports(PPS)is crucial for the stability of longwall pre-driven recovery room(PRR)surrounding ***,the unbalanced bearing coefficient(UBC)of the PPS(undertaking unequal load along the mining direction)has not been investigated.A mechanical model of the PRR was established,considering the main roof cantilever beam structure,to derive an assessment formula for the load,the failure criteria,and the UBC of the ***,the generation mechanisms,and influencing factors of the UBC were *** sensitivity analysis shows that the main roof hanging length(l_(2))and the spacing between the PPS(r)significantly impact the UBC.A novel design of the PPS and the coupling control technology were proposed and applied to reduce the UBC of the PPS in the adjacent longwall *** results showed no failure of the PPS at the test site,with the UBC(ζ)reduced to 1.1 consistent with the design value(1.15)basically,fully utilizing the collaborative LBP of the ***,the maximum roof-to-floor convergence of the PRR was 234 mm,effectively controlling the stability of the surrounding rock of the PRR and ensuring the mining equipment recovery.

关键词： Pre-driven recovery room Pumpable supports Unbalanced bearing coefficient Hydraulic fracture Stability analysis Surrounding rock control

Riemann-Hilbert Problem and Multiple High-order Poles Solutions of the Focusing MKdV Equation with Nonzero Boundary Conditions

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2024年

作者： Zi-yi WANG Shou-fu tian Jin-jie YANG School of Mathematics China University of Mining and Technology

The focusing modified Korteweg-de Vries (mKdV) equation with multiple high-order poles under the nonzero boundary conditions is first investigated via developing a Riemann-Hilbert(RH) approach. We begin with the asymptotic property, symmetry and analyticity of the Jost solutions, and successfully construct the RH problem of the focusing mKdV equation. We solve the RH problem when 1/S11(k) has a single highorder pole and multiple high-order poles. furthermore, we derive the soliton solutions of the focusing mKdV equation which corresponding with a single high-order pole and multiple high-order poles, respectively. Finally,the dynamics of one-and two-soliton solutions are graphically discussed.

关键词：

Riemann-Hilbert Approach to the Fifth-order Nonlinear Schr?dinger Equation with Non-vanishing Boundary Conditions

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2024年

作者： Jin-jie YANG Shou-fu tian Zhi-qiang LI School of Mathematics China University of Mining and Technology

The Cauchy problem of the fifth-order nonlinear Schr?dinger (foNLS) equation is investigated with nonzero boundary conditions in detailed. Firstly, the spectral analysis of the scattering problem is carried out.A Riemann surface and affine parameters are introduced to transform the original spectral parameter to a new spectral parameter in order to avoid the multi-valued problem. Based on Lax pair of the foNLS equation, the Jost functions are obtained, and their analytical, asymptotic, symmetric properties, as well as the corresponding properties of the scattering matrix are established systematically. For the inverse scattering problem, we discuss the cases that the scattering coefficients have simple zeros and double zeros, respectively, and we further derive their corresponding exact solutions via solving a suitable Riemann-Hilbert problem. Moreover, some interesting phenomena are found when we choose some appropriate parameters for these exact solutions, which are helpful to study the propagation behavior of these solutions.

关键词：

Cofitness network connectivity determines a fuzzy essential zone in open bacterial pangenome

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

mLife 2024年第2期3卷 277-290页

作者： Pan Zhang Biliang Zhang Yuan-Yuan Ji Jian Jiao Ziding Zhang Chang-fu tian State Key Laboratory of Plant Environmental Resilience and College of Biological SciencesChina Agricultural UniversityBeijingChina MOA Key Laboratory of Soil Microbiology and Rhizobium Research CenterChina Agricultural UniversityBeijingChina Shenzhen Institute of Synthetic Biology Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenChina State Key Laboratory of Livestock and Poultry Biotechnology Breeding and College of Biological SciencesChina Agricultural UniversityBeijingChina

Most in silico evolutionary studies commonly assumed that core genes are essential for cellular function,while accessory genes are dispensable,particularly in nutrient-rich ***,this assumption is seldom tested genetically within the pangenome *** this study,we conducted a robust pangenomic Tn-seq analysis of fitness genes in a nutrient-rich medium for Sinorhizobium strains with a canonical open *** evaluate the robustness of fitness category assignment,Tn-seq data for three independent mutant libraries per strain were analyzed by three methods,which indicates that the Hidden Markov Model(HMM)-based method is most robust to variations between mutant libraries and not sensitive to data size,outperforming the Bayesian and Monte Carlo simulation-based ***,the HMM method was used to classify the fitness *** genes,categorized as essential(ES),advantage(GA),and disadvantage(GD)genes for growth,are enriched in core genes,while nonessential genes(NE)are over-represented in accessory *** ES/GA genes showed a lower fitness effect than core ES/GA *** degrees in the cofitness network decrease in the order of ES,GD,and GA/*** addition to accessory genes,1599 out of 3284 core genes display differential essentiality across test *** the pangenome core,both shared quasi-essential(ES and GA)and strain-dependent fitness genes are enriched in similar functional *** analysis demonstrates a considerable fuzzy essential zone determined by cofitness connectivity degrees in Sinorhizobium pangenome and highlights the power of the cofitness network in understanding the genetic basis of ever-increasing prokaryotic pangenome data.

关键词： cofitnessnetwork pangenome Tn-seq

Characteristics of long-distance mobile mRNAs from shoot to root in grafted plant species

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

Horticultural Plant Journal 2024年第1期10卷 25-37页

作者： Mengmeng fu Zhen Xu Huaying Ma Yifan Hao Ji tian Yi Wang Xinzhong Zhang Xuefeng Xu Zhenhai Han Ting Wu College of Horticulture China Agricultural UniversityBeijing 100193China Plant Science and Technology College Beijing University of AgricultureBeijing 102206China

Thousands of long-distance mobile mRNAs were identified from different grafting systems,based on high-throughput sequencing ***,the long-distance delivery of RNAs was proved to involve multiple ***,we analyzed the homology,motif,and tRNA-like structure(TLS)of long-distance mobile mRNAs identified by RNA-seq as well as the RNA-binding protein(RBP)in nine grafting combinations including Arabidopsis thaliana,Vitis vinifera,Cucumis sativus,Citrullus lanatus,Nicotiana benthamiana,Malus domestica,Pyrus spp.,Glycine max and Phaseolus *** several mRNAs were found to be shared in herbaceous,woody,and related species,the vast majority of long-distance mobile mRNAs were *** non-specific movement-related motifs were identified,while the TLS was not necessary for mRNA long distance *** addition,we found that RBPs were conserved among herbaceous and woody plants as well as related *** paper reports a further in-depth analysis of the endogenous mechanisms by which the species-specific transportable m RNAs were selected by bioinformatics,in order to provide insights for future research on long-distance mobile mRNAs.

关键词： Grafting combination Long-distance mobile mRNA TLS RNA binding proteins

Revealing the Structure-Property Difference of Natural Rubber Prepared by Different Methods: Protein and Gel Content are Key Factors

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2024年第4期42卷 457-467页

作者： Shao-Qi Huang Jun-Qi Zhang Yong Zhu Ling-Min Kong Lu-Sheng Liao fu-Quan Zhang Zheng-tian Xie Jin-Rong Wu State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu610065China Hainan Provincial Key Laboratory of Natural Rubber Processing Agricultural Products Processing Research Institute of Chinese Academy of Tropical Agricultural SciencesZhanjiang524001China

Natural rubber (NR) is widely used in various fields including aerospace, military industry and transportation due to its superior elasticity and comprehensive mechanical properties. Nonetheless, the commercial NR prepared by different methods usually exhibits different mechanical properties, primarily due to variations in processing conditions during the conversion from latex to bulk rubber material. Consequently, this poses challenges in scientific research and industrial production of NR. In order to assess the properties of various commercially available NR and identify key structural and compositional components, this study systematically compares and analyzes four representative NR raw materials: air dried sheet (ADS), ribbed smoked sheets (RSS), constant viscidity NR (CV), and whole field latex rubber (WF). The investigation focuses on evaluating their static mechanical behavior, SIC behavior, wear resistance, and fatigue resistance. The findings indicate that protein and gel content exhibit a crucial influence on the NR properties. These constituents contribute to the formation of a high-crosslinking density region, generating a heterogeneous network structure within the rubber. This structure amplifies strains during deformation, leading to earlier and stronger strain-induced crystallization (SIC). Among the four commercial NR brands, RSS demonstrates superior overall mechanical and dynamic properties owing to its high protein and gel content. This study serves as a valuable reference for comprehending the differences in properties among various commercial NR, thereby offering guidance for the actual processing and selection of NR.

关键词： Natural rubber Processingmethod Protein Gel content Property

Impacts of high temperature,relative air humidity,and vapor pressure deficit on the seed set of contrasting maize genotypes during flowering

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2024年第9期23卷 2955-2969页

作者： Xin Dong Baole Li Zhenzhen Yan Ling Guan Shoubing Huang Shujun Li Zhiyun Qi Ling Tang Honglin tian Zhongjun fu Hua Yang Chongqing Academy of Agricultural Sciences Chongqing 401329China College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100193China

Heat stress is a major constraint to current and future maize production at the global *** and female reproductive organs both play major roles in increasing seed set under heat stress at flowering,but their relative contributions to seed set are *** this study,a 2-year field experiment including three sowing dates in each year and 20 inbred lines was *** set,kernel number per ear,and grain yield were all reduced by more than 80%in the third sowing dates compared to the first sowing *** viability,silk emergence ratio,and anthesis-silking interval were the key determinants of seed set under heat stress;and their correlation coefficients were 0.89^(***),0.65^(***),and-0.72^(***),*** pressure deficit(VPD)and relative air humidity(RH)both had significant correlations with pollen viability and the silk emergence *** RH can alleviate the impacts of heat on maize seed set by maintaining high pollen viability and a high silk emergence *** a warming climate from 2020 to 2050,VPD will decrease due to the increased *** on their pollen viability and silk emergence ratios,the 20 genotypes fell into four different *** group with high pollen viability and a high silk emergence ratio performed better under heat stress,and their performance can be further improved by combining the improved flowering pattern traits.

关键词： maize pollen viability silk emergence heat stress relative humidity

Huangqin Decoction Delays Progress of Colitis-Associated Carcinogenesis by Regulating Nrf2/HO-1 Antioxidant Signal Pathwayin Mice

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Integrative Medicine 2024年第2期30卷 135-142页

作者： GU Li-mei LI He-zhong GAO Lei LI Hui WEI Lan-fu PAN Cheng-yu WU Ke-xuan tian Yao-zhou Department of Gastrointestinal Endoscopy Affiliated Hospital of Nanjing University of Chinese MedicineNanjing(210029)China Department of Gastroenterology Affiliated Hospital of Integrated Traditional Chinese and Western MedicineNanjing University of Chinese MedicineNanjing(210028)China School of Integrated Chinese and Western Medicine Nanjing University of Chinese MedicineNanjing(210023)China

Objective:To investigate the effect of Huangqin Decoction(HQD)on nuclear factor erythroid 2 related-factor 2(Nrf2)/heme oxygenase(HO-1)signaling pathway by inducing the colitis-associated carcinogenesis(CAC)model mice with azoxymethane(AOM)/dextran sodium sulfate(DSS).Methods:The chemical components of HQD were analyzed by liquid chromatography-quadrupole-time-of-flight mass spectrometry(LC-Q-TOF-MS/MS)to determine the molecular constituents of *** 48 C57BL/6J mice were randomly divided into 6 groups by a random number table,including control,model(AOM/DSS),mesalazine(MS),low-,medium-,and high-dose HQD(HQD-L,HQD-M,and HQD-H)groups,8 mice in each *** for the control group,the mice in the other groups were intraperitoneally injected with AOM(10 mg/kg)and administrated with 2.5%DSS orally for 1 week every two weeks(totally 3 rounds of DSS)to construct a colitis-associated carcinogenesis mouse *** mice in the HQD-L,HQD-M and HQD-H groups were given HQD by gavage at doses of 2.925,5.85,and 11.7 g/kg,respectively;the mice in the MS group was given a suspension of MS at a dose of 0.043 g/kg(totally 11 weeks).The serum levels of malondialdehyde(MDA)and superoxide dismutase(SOD)were measured by enzyme-linked immunosorbent *** mRNA and protein expression levels of Nrf2,HO-1,and inhibitory KELCH like ECH-related protein 1(Keap1)in colon tissue were detected by quantitative real-time PCR,immunohistochemistry,and Westem blot,***:LC-Q-TOF-MS/MS analysis revealed that the chemical constituents of HQD include baicalin,paeoniflorin,and glycyrrhizic *** to the control group,significantly higher MDA levels and lower SOD levels were observed in the model group(P<0.05),whereas the expressions of Nrf2 and HO-1 were significantly decreased,and the expression of Keap1 increased(P<0.01).Compared with the model group,serum MDA level was decreased and SOD level was increased in the HQD-M,HQD-H and MS groups(P<0.05).Higher expressions of

关键词： Huangqin Decoction colitis-associated carcinogenesis nuclear factor erythroid 2 related-factor 2/heme oxygenase signaling pathway oxidative stress Chinese medicine