检索结果-南通市图书馆

Viscoelastic stress change from the 1931 m_(w)7.8 Fuyun earthquake and its impacts on seismic activity around the Altai mountains

在线全文

学校读者我要写书评

暂无评论

Geodesy and Geodynamics 2024年第4期15卷 326-337页

作者： Yali Shao jiankun he Xinguo Wang Youjia Zhao Key Laboratory of Tibetan Plateau Earth System Environment and ResourcesInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

The 1931 m_(w)7.8 Fuyun earthquake occurred around the Altai mountains, an intracontinental deformation belt with limited active strain-rate accumulation. To explore whether seismic activity in this deformation belt was affected by stress interaction among different active faults, we calculate the Coulomb failure stress change(ΔCFS) induced by the Fuyun earthquake due to coseismic deformation of the elastic crust and postseismic viscoelastic relaxation of the lower crust and upper mantle. Numerical results show that the total ΔCFS at a 10-km depth produced by the Fuyun earthquake attains approximately 0.015-0.134 bar near the epicenter, and just before the occurrence of the 2003 m_(w)7.2 Chuya earthquake, which distances about 400 km away from the Fuyun earthquake. Among the increased ΔCFS,viscoelastic relaxation from 1931 to 2003 contributes to approximately 0.014-0.131 bar, accounting for>90% of the total ΔCFS. more importantly, we find that for the recorded seismicity in the region with a radius of about 270 km to the Fuyun earthquake from 1970 to 2018, the percentage of earthquakes that fall in positive lobes of ΔCFS resolved on the NNW-SSE Fuyun strike-slip fault, on the NWW-SEE Irtysh strike-slip fault, and on the NW-SE Kurti reverse fault is up to 67.22%-91.36%. Therefore, the predictedΔCFS suggests that the impact of the 1931 m_(w)7.8 Fuyun earthquake on seismic activity around the Altai mountains is still significant as to hasten occurrence of the 2003 m_(w)7.2 Chuya earthquake at a relatively far distance and to trigger its aftershocks in the near-field even after several decades of the mainshock.

关键词： Altai mountains Fuyunearthquake Coulomb failure stress change Viscoelasticrelaxation Seismic activity

Inversion of O_(2) 1.27 μm nightglow emissions: A climatological analysis using satellite Limb-Viewed spectra and Harmonic analysis method

在线全文

学校读者我要写书评

暂无评论

Earth and Planetary Physics 2024年第4期8卷 632-640页

作者： YiYi Sui YaJun Zhu QiuYu Chen maoSheng he JiYao Xu State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100190China Key Laboratory of Solar Activity and Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China Hainan National Field Science Observation and Research Observatory for Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China

This study employs a linear inversion algorithm to retrieve volume emission rates(VERs)of molecular O_(2) nightglow at 1.27μm,utilizing Limb-Viewed spectra obtained from the SCanning Imaging Absorption spectrometer for Atmospheric for CHartographY(SCIAmACHY)payload on board the Envisat *** retrieved results are compared with VERs data from the SABER payload on the Thermosphere Ionosphere mesosphere Energetics and Dynamics(TImED)satellite,exhibiting *** will help to facilitate accurate revelation of spatial distribution and periodic variation in O_(2) *** are extracted monthly within the altitude range of 75-110 km from 2002 to 2012,yielding a climatology of spatial and temporal *** meridional structure exhibits two maxima,at the equator and at 45°*** August and October,the VERs exhibit a meridional bimodal structure,with the weaker one above the equator and the stronger one above 45°*** April,the VERs reach their annual ***,harmonic analysis reveals significant temporal variations on different *** emission shows characteristics of annual and semi-annual variation,and a non-linear long-term trend associated with solar cycle activity.

关键词： VERs O_(2)1.27μm nightglow SCIAmACHY

Bacterial community network complexity and role of stochasticity decrease during primary succession

在线全文

学校读者我要写书评

暂无评论

Soil Ecology Letters 2024年第3期6卷 45-59页

作者： Yucheng he Binu m.Tripathi Jie Fang Zihao Liu Yaping Guo Yue Xue Jonathan m.Adams School of Geography and Ocean Science Nanjing UniversityNanjing 210023China Korea Polar Research Institute Incheon 21990Republic of Korea

In microbial ecology,there is limited understanding of the mechanisms governing patterns in community structure across space and ***,we studied the changes of bacterial co-occurrence network structure over four primary successional soils after glacier retreat,including a sand dune system and three glacier foreland series,varying in timescale from centuries to *** found that in all series,network structure was most complex in the earliest stages of succession,and became simpler over *** and abundance of keystone species and network stability also declined over *** appears that with less productive,nutrient poor and physiologically extreme conditions of early succession,closer interactions among bacterial species are ecologically selected *** may take the form of consortia(with positive interactions)or stronger niche exclusion(with negative interactions).Additionally,we quantified the relative roles of different structuring processes on bacterial community using a bin-based null model analysis(iCAmP).With each successional series,community composition was initially governed by stochasticity,but as succession proceeded there was a progressive increase in deterministic selection over time,correlated with decreasing ***,our results show a consistency among the four series in long-term processes of community succession,with more integrated networks and greater stochasticity in early stages.

关键词： glacial retreat bacteria chronosequence co-occurrence network 16S rRNA sequencing community assembly

AZGP1P2/UBA1/RBm15 Cascade mediates the Fate Determinations of Prostate Cancer Stem Cells and Promotes Therapeutic Effect of Docetaxel in Castration-Resistant Prostate Cancer via TPm1 m6A modification

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research 2024年第3期6卷 151-167页

作者： Hong Wang Jj Liu Xiaojun Zhu Bin Yang Zuping he Xudong Yao Department of Urology Shanghai Tenth People’s HospitalSchool of MedicineTongji UniversityShanghaiChina Urologic Cancer Institute School of MedicineTongji UniversityShanghaiChina. Department of Urology Surgery The Affiliated Hospital of Inner Mongolia Medical UniversityHohhotChina. The Key Laboratory of model Animals and Stem Cell Biology in Hunan Province School of MedicineHunan Normal UniversityThe Engineering Research Center of Reproduction and Translational Medicine of Hunan ProvinceChangshaChina Shanghai Key Laboratory of Reproductive medicine Shanghai Jiao Tong University School of MedicineShanghaiChina.

Prostate cancer(PCa)is a common malignant tumor with high morbidity and mortality *** prostate cancer stem cell(PCSC)model provides novel insights into the pathogenesis of PCa and its therapeutic ***,the roles and molecular mechanisms of specific genes in mediating fate decisions of PCSCs and carcinogenesis of PCa remain to be *** this study,we have explored the expression,function,and mechanism of AZGP1P2,a pseudogene of AZGP1,in regulating the stemness and apoptosis of PCSCs and treatment resistance of docetaxel in castration-resistant prostate cancer(CRPC).We revealed that AZGP1P2 was downregulated in CRPC cell lines and PCSCs,while it was positively associated with progression-free *** of the AZGP1P2 enhanced the sensitivity of docetaxel treatment in CRPCs via inhibiting their *** pull-down associated with mass spectrometry analysis,co-immunoprecipitation assay,and RNA immunoprecipitation assay demonstrated that AZGP1P2 could bind to UBA1 and RBm15 as a“writer”of methyltransferase to form a ***1,an E1 ubiquitin-activating enzyme,contributed to RBm15 protein degradation via ubiquitination *** RNA immunoprecipitation assay displayed that RBm15 controlled the mRNA decay of TPm1 in m6A ***,a xenograft mouse model and patient-derived organoids showed that the therapeutic effect of docetaxel in CRPC was increased by AZGP1P2 in ***,these results imply that AZGP1P2 mediates the stemness and apoptosis of PCSCs and promotes docetaxel therapeutic effect by suppressing tumor growth and metastasis via UBA1/RBm15-mediated TPm1 mRNA decay in CRPC.

关键词： Prostate TPm1 m6A

A Label-Free Deoxyribozyme Sensor for m^(6)A Demethylase Activity Detection

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2024年第9期42卷 951-956页

作者： Xiuyuan Wang Shusheng Yu Yuqiu he Fuan Wang Xiaoqing Liu College of Chemistry and molecular Sciences Wuhan UniversityWuhanHubei 430072China

A label-free deoxyribozyme(DNAzyme)biosensor for m^(6) demethylase activity detection is *** demethylase FTO(Fat mass and obesity-associated protein),an important m^(6) demethylase of ALKBH demethylase family is present,the m^(6) group is specifically demethylated,and the cleavage activity of DNAzyme is *** allows the cleavage product that contains G-quadruplex sequence to bind to thioflavin T(ThT)and generate fluorescence *** biosensor shows high specificity and sensitivity,and fast reaction *** study demonstrates a new design of allosteric DNAzyme for *** method represents the first label-free nucleic acid biosensor for FTO assay,providing a feasible route towards inhibitors screening.

关键词： DNAzyme Analytical methods Biosensing m^(6)A demethylation Fluorescence

Influence of cerium ions on structure-dependent magnetic properties of Ba-Sr m-type hexaferrite nanocrystals

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第2期42卷 364-372,I0005页

作者： Ram A.Pawar Sunil m.Patange P.m.Dighe Sher Singh meena Abdullah GAl-Sehemi mehboobali Pannipara Santosh S.Jadhav Department of Physics ArtsCommerce and Science CollegeAhmednagar413711MaharashtraIndia Department of Physics Shri Krishna MahavidyalayaGunjotiDistOsmanabad413606MaharashtraIndia Padmashri Vikhe Patil College of Arts Science and CommercePravaranagarA/P.Loni(Kd)Tal.RahataDistAhmednagar413713MaharashtraIndia Solid State Physics Division Bhabha Atomic Research CentreMumbai400085MaharashtraIndia Department of Chemistry King Khalid UniversityAbha61413Saudi Arabia Department of Physics D.S.M's ArtsCommerce and Science CollegeJintur431509MaharashtraIndia

The present study is a systematic effort to investigate the structure-sensitive magnetic parameters of Ce^(3+) substituted Ba-Sr hexaferrite nanocrystals chemically formulated as Ba_(0.5)Sr_(0.5)Ce_(x)Fe_(12-x)O_(19) where x=0.0-0.2 with Δx=*** hexaferrite powders were prepared using the sol-gel self-ignition route and structurally characterized by means of powder X-ray diffraction and Fourier transform infrared *** creation of the m-type hexaferrite phase within the synthesized samples was revealed from the Rietveld refinement of the X-ray *** occurrence of a secondary phase of CeO_(2) was revealed within the hexaferrites for the substitution,x> *** refined X-ray diffraction data were utilized to compute the lattice parameters,X-ray density,and lattice parameter *** crystal structure plotted from the refined XRD data reveals the occupancy of the ions at different lattice *** XPS data of the hexaferrite were analyzed to confirm the oxidation states of the constituent *** nanocrystalline nature of the hexaferrites was revealed from the crystallite sizes calculated using Scherer's *** analysis of FTIR spectra confirms that only a fraction of Ce^(3+)accommodated in the lattice and the remaining Ce content reside in the form of the CeO_(2) *** morphology of the hexaferrites was analyzed from the FESEm profiles of the ferrite *** magnetic behavior study was performed by analyzing the Curie temperature,hysteresis loops,and hyperfine interactions by means of susceptibility,V.S.m,and mossbauer spectroscopy,*** hexaferrites with increasing coercivity,decreasing saturation magnetization,and decreasing Curie temperature are reported in the *** substituted Ce^(3+)ions inhibit the grain growth and create lattice imperfections giving rise to hexaferrites with tuned magnetic parameters suitable for different applications.

关键词： Ba-Sr hexaferrite Ce^(3+)substitution XPS Saturation magnetization Coercivity m?ssbauer spectroscopy

CONSTANS alters the circadian clock in Arabidopsis thaliana

在线全文

学校读者我要写书评

暂无评论

molecular Plant 2024年第8期17卷 1204-1220页

作者： Pedro de los Reyes Gloria Serrano-Bueno Francisco J.Romero-Campero he Gao Jose m.Romero Federico Valverde Plant Development Group-Institute for Plant Biochemistry and Photosynthesis Consejo Superior de Investigaciones CientificasUniversidad de SevillaSevilleSpain Department of Computer Science and Artificial Intelligence Universidad de SevillaSevilleSpain Department of Plant Developmental Biology Max Planck Institute for Plant Breeding ResearchCologneGermany Department of Plant Biochemistry and molecular Biology Universidad de SevillaSevilleSpain

Plants are sessile organisms that have acquired highly plastic developmental strategies to adapt to the *** these processes,the floral transition is essential to ensure reproductive success and is finelyregulated by several internal andexternal genetic *** photoperiodic pathway,which controls plant response to day length,is one of the most important pathways controlling *** Arabidopsis photoperiodic flowering,CONSTANS(CO)is the central gene activating the expression of the florigen FLOWERING LOCUS T(FT)in the leaves at the end of a long *** circadian clock strongly regulates Co ***,to date,no evidence has been reported regarding a feedbackloop from the photoperiod pathway back to the circadian *** transcriptional networks,we have identified relevant network motifs regulating the interplay between the circadian clock and the photoperiod *** expression,chromatin immunoprecipitation experiments,and phenotypic analysis allowed us to elucidate the role of Co over the circadian *** with altered cO expression showed a different internal clock period,measured by daily leaf rhythmic *** showed that co upregulates the expression of key genes related to the circadian clock,such as CCA1,LHY,PRR5,and Gl,at the end of a long day by bindingto specific sites on their ***,a high numberof PRR5-repressed target genes are upregulated by CO,and this could explain the phase transition promoted by *** CO-PRR5 complex interacts with the bZiP transcriptionfactor HY5andhelps to localize the complex in the promoters of clock *** together,our results indicate that there may be a feedback loop in which co communicates back to the circadian clock,providing seasonal information to the circadian system.

关键词： CONSTANS circadian clock photoperiod

Co-doped Ni_(3)S_(2) nanosheet array: A high-efficiency electrocatalyst for alkaline seawater oxidation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第3期17卷 1050-1055页

作者： meng Yue Xun he Shengjun Sun Yuntong Sun mohamed S.Hamdy mhamed Benaissa Alsamani A.m.Salih Jun Liu Xuping Sun College of Chemistry Chemical Engineering and Materials ScienceShandong Normal UniversityJinan 250014China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China Department of Chemistry College of ScienceKing Khalid UniversityP.O.Box 9004Abha 61413Saudi Arabia Department of Chemical Engineering College of EngineeringUniversity of Ha’ilP.O.Box 2440Ha’il 81441Saudi Arabia Department of Otolaryngology-head&Neck Surgery West China HospitalSichuan UniversityChengdu 610041China

Developing efficient and durable oxygen evolution reaction(OER)catalysts holds great promise for green hydrogen production via seawater electrolysis,but remains a ***,we report a Co-doped Ni_(3)S_(2) nanosheet array on Ni foam(Co-Ni_(3)S_(2)/NF)as a high-efficiency OER electrocatalyst for *** alkaline conditions,Co-Ni_(3)S_(2)/NF requires an overpotential of only 368 mV to drive 100 mA·cm^(–2),superior to Ni_(3)S_(2)/NF(385 mV).Besides,it exhibits at least 50-h continuous electrolysis.

关键词： Co doping Ni_(3)S_(2)nanosheet array oxygen evolution reaction seawater electrolysis electrocatalyst

Frequency-dependent viscoelasticity effects on the wave attenuation performance of multi-layered periodic foundations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied mathematics and mechanics(English Edition) 2024年第3期45卷 407-424页

作者： m.SAFI m.VAKILIFARD m.J.mAHmOODI Faculty of Civil Water&Environmental EngineeringShahid Beheshti UniversityTehran ***Iran Faculty of mechanical and Energy Engineering Shahid Beheshti UniversityTehran ***Iran

In this paper,layered periodic foundations(LPFs)are numerically examined for their responses to longitudinal and transverse modes in the time and frequency *** different unit-cells,i.e.,2-layer,4-layer,and 6-layer unit-cells,comprising concrete/rubber,concrete/rubber/steel/rubber,and concrete/rubber/steel/rubber/lead/rubber materials,respectively,are taken into ***,the viscoelasticity behavior of the rubber is modeled with two factors,i.e.,a frequency-independent(FI)loss factor and a linear frequency-dependent(FD)loss *** the extraction of the complex dispersion curves and the identification of the band gaps(BGs),the simulations of wave transmission in the time and frequency domains are performed using the COmSOL *** parametric studies evaluate the effects of the rubber viscoelasticity models on the dispersion curves and the wave transmission for the longitudinal and transverse *** results show that considering the rubber viscoelasticity enhances the wave attenuation ***,the transverse-mode damping is more sensitive to the viscoelasticity model than its longitudinal *** 6-layer unit-cell LPF exhibits the lowest BG,ranging from 4.8 Hz to 6.5 Hz.

关键词： layered metamaterial periodic foundation complex dispersion curve wave transmission diagram