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Probing the Gamma-Ray Emission Region of Five TeV Flat Spectrum Radio Quasars

Research in Astronomy and Astrophysics 2024年第6期24卷 156-169页

作者： hu-Bing Xiao Hai-Tao Cao Rui Xue Jin-Ting Cai ge-ge Wang Marina Manganaro Shao-hua Zhang Zhi-Hao Ouyang Li-Ping Fu Jun-hui Fan Shanghai Key Lab for Astrophysics Shanghai Normal UniversityShanghai 200234China School of Information Engineering Guangzhou Panyu PolytechnicGuangzhou 511483China Department of Physics Zhejiang Normal UniversityJinhua 321004China College of Mathematics and Physics Guangxi Minzu UniversityNanning 530006China Key Laboratory of Cosmology and Astrophysics(Liaoning) College of SciencesNortheastern UniversityShenyang 110819China Department of Physics University of RijekaRijeka 51000Croatia Center for Astrophysics Guangzhou UniversityGuangzhou 510006China Key Laboratory for Astronomical Observation and Technology of Guangzhou Guangzhou 510006China Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province Guangzhou 510006China

The location ofγ-ray emission of blazars remains a contested topic,inspiring the development of numerous investigative techniques to address this *** this work,we analyzed Fermiγ-ray light curves in the geV and MeV bands,employing the discrete cross-correlation function method to discern time lags between the two *** 4C+21.35,Ton 599,B21420+32,and PKS 1510-089,we identified a time lag spanning several days,while for PKS 1441+25,the time lag was not statistically *** results imply that the soft photons necessary for inverse Compton scattering predominantly originate from the dusty torus in the first four sources,whereas for PKS1441+25,they seem to be sourced mainly from the broad-line *** analysis of the opacity(τγγ)and the geV spectra study supports the conclusion that the location of the dissipation region must be beyond the BLR to avoid significant ***,for PKS 1441+25,the emission region is also posited to lie outside yet proximate to the *** parameters of describing the emission region were obtained by fitting broadband spectral energy distribution with contemporaneous observation *** findings suggest that for the five TeV FSRQs,during Te V flaring events,the jet appears to maintain an equilibrium between the energy density of the magnetic field and that of the particles for all investigated sources,with the exceptions of 4C+21.35 and PKS1441+*** terms of the overall jet power,particle energy is the dominant contributor,and the observed blazar radiation cannot be solely attributed to the magnetic field,except in the case of 4C+***,magnetic reconnection is unlikely to be the primary mechanism behind particle acceleration in these systems.

关键词： galaxies:active gamma-rays:galaxies galaxies:jets

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Discovery of a potent and selective cell division cycle 7 inhibitor from 6-(3-fluoropyridin4-yl)thieno[3,2-d]pyrimidin-4(3H)-one derivatives as an orally active antitumor agent

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Acta Pharmaceutica Sinica B 2024年第2期14卷 893-896页

作者： Mingwei Fu Min ge Wanxiang Yang Chunchen hu Xiaowei Li Yuanjiang Wang Shaohua Gou Pharmaceutical Research Center and School of Chemistry and Chemical Engineering Southeast UniversityNanjing 211189China Jiangsu Province Hi-Tech Key Laboratory for Biomedical Research Southeast UniversityNanjing 211189China Zenji Research Laboratories Nanjing 211189China

To the Editor:Kinase cell division cycle 7(CDC7),a cell division cycle protein,takes a vital role in mediating DNA ***7 complexes in the nucleus can phosphorylate the minichromosome maintenance complex(MCM)family members that bind to *** addition,CDC7 kinase,as a molecular switch regulating DNA replication,can mediate DNA damage signaling pathways to stimulate cell cycle termination as well as DNA *** have shown that CDC7 is overexpressed in many types of cancer cells,and its overexpression was related to poor patient survival,tumor grade,genetic instability,aneuploidy and so ***,CDC7 is a promising target for antitumor therapy.

关键词： Cell division cycle 7 DNA replication CDC7 inhibitor Anti-tumor

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Ethanol extract of Abelmoschus manihot suppresses endoplasmic reticulum stress in contrast-induced nephropathy

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Asian Pacific Journal of Tropical Biomedicine 2024年第1期14卷 17-27,I0002,I0003页

作者： Xin Lin Xin Lu Yun-He Zhao Yi-Bei Wang Ru-ge Niu Xiao-hu Chen Department of Cardiology Affiliated Hospital of Nanjing University of Chinese MedicineJiangsu Province Hospital of Chinese MedicineNanjingJiangsu 210004China

Objective:To explore the efficacy and potential mechanisms of the ethanol extract of Abelmoschus manihot(L.)Medic in contrast-induced nephropathy(CIN).Methods:CIN rat models and human renal proximal tubular cells(HK-2)with iopromide-induced injury were employed to mimic CIN *** effect of Abelmoschus manihot extract on the rat models and HK-2 cells was *** rat models,kidney function,histology,oxidative stress and apoptosis were *** HK-2 cells,cell viability,apoptosis,mitochondrial membrane potential,and endoplasmic reticulum stress were ***:Abelmoschus manihot extract significantly improved structural and functional impairments in the kidneys of CIN ***,the extract effectively mitigated the decline in cellular viability and reduced iopromide-induced oxidative stress and lipid *** investigations revealed that Abelmoschus manihot extract prominently attenuated acute endoplasmic reticulum stress-mediated apoptosis by downregulating GRP78 and CHOP protein ***:Abelmoschus manihot extract can be used as a promising therapeutic and preventive agent in the treatment of CIN.

关键词： Contrast-induced nephropathy Abelmoschus manihot extract ER stress Apoptosis GRP78 CHOP

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Disulfide bridge-targeted metabolome mining unravels an antiparkinsonian peptide

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Acta Pharmaceutica Sinica B 2024年第2期14卷 881-892页

作者： Zhiwu Tong Xiahong Xie huiming ge Ruihua Jiao Tingting Wang Xincun Wang Wenying Zhuang Gang hu Renxiang Tan State Key Laboratory of Pharmaceutical Biotechnology Institute of Functional BiomoleculesSchool of Life SciencesNanjing UniversityNanjing 210023China State Key Laboratory Cultivation Base for TCM Quality and Efficacy Nanjing University of Chinese MedicineNanjing 210023China Institute of Microbiology Chinese Academy of SciencesBeijing 100101China

Peptides are a particular molecule class with inherent attributes of some small-molecule drugs and macromolecular biologics,thereby inspiring continuous searches for peptides with therapeutic and/or agrochemical ***,the success rate is decreasing,presumably because many interesting but less-abundant peptides are so scarce or labile that they are likely‘overlooked’during the characterization ***,we present the biochemical characterization and druggability improvement of an unprecedented minor fungal RiPP(ribosomally synthesized and post-translationally modified peptide),named acalitide,by taking the relevant advantages of metabolomics approach and disulfide-bridged substructure which is more frequently imprinted in the marketed peptide drug *** is biosynthetically unique in the macrotricyclization via two disulfide bridges and a protease(AcaB)-catalyzed lactamization of AcaA,an unprecedented precursor *** a biosynthetic logic was successfully re-edited for its sample supply renewal to facilitate the identification of the in vitro and in vivo antiparkinsonian efficacy of acalitide which was further confirmed safe and rendered brain-targetable by the liposome encapsulation *** together,the work updates the mining strategy and biosynthetic complexity of RiPPs to unravel an antiparkinsonian drug candidate valuable for combating Parkinson’s disease that is globally prevailing in an alarming manner.

关键词： Fungal RiPPs Biosynthesis Macrocyclic peptide Acalitide Antiparkinsonian

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Visualizing extended defects at the atomic level in a Bi_(2)Sr_(2)CaCu_(2)O8_(+σ) superconducting wire

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Chinese Physics B 2024年第9期33卷 43-47页

作者： Kejun hu Shuai Wang Boyu Li Ying Liu Binghui ge Dongsheng Song Information Materials and Intelligent Sensing Laboratory of Anhui Province Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationInstitutes of Physical Science and Information TechnologyAnhui UniversityHefei 230601China

The microstructure significantly influences the superconducting ***,the defect structures and atomic arrangements in high-temperature Bi_(2)Sr_(2)CaCu_(2)O8_(+σ) superconducting wire are directly characterized via stateof-the-art scanning transmission electron *** oxygen atoms are observed in both the charge reservoir layers and grain boundaries in the doped *** phases with varied numbers of CuO_(2) layers are found,and twist interfaces with different angles are *** study provides insights into the structures of Bi-2212 wire and lays the groundwork for guiding the design of microstructures and optimizing the production methods to enhance superconducting performance.

关键词： superconductor microstructure defect scanning transmission electron microscopy

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Uses of knockout,knockdown,and transgenic models in the studies of glucose transporter 4

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World Journal of Meta-Analysis 2022年第1期10卷 1-11页

作者： Tian-Nan Wang Xin-ge hu Guo-Xun Chen Department of Nutrition The University of TennesseeKnoxvilleTN 37996United States

Currently,glucose transporter 4(GLUT4)has been considered as the key player for the insulin-stimulated glucose transport in the muscle and adipose *** development of recombinant DNA techniques allows the creations of genetically knockout,knockdown and transgenic animals and cells for the study of GLUT4’s physiological ***,we have used key words to search the PubMed and summarized the methods used in Slc2a4 gene knockout,GLUT4 knockdown and overexpression in the whole body and tissue specific *** whole body GLUT4-null mice have growth retardation,but normal glucose tolerance and basal glucose turnover *** with whole body Slc2a4 knockout mice,adipose and muscle double knockout mice have impaired insulin tolerance and glucose *** results of GLUT4 knockdown in 3T3-L1 adipocytes have shown that its expression is needed for lipogenesis after,but not during,*** mice with the whole body GLUT4 overexpression have normal body weight and lowered blood glucose *** adipose tissue specific overexpression of GLUT4 leads to increases in mouse body weight and adipose tissue *** insulin-stimulated GLUT4 translocation in the skeletal muscle contributes to the regulation of glucose *** from both transgenic overexpression and tissue specific Slc2a4 knockout indicate that GLUT4 probably plays a role in the glucose uptake in the fasting *** studies are warranted to use advanced molecular biology tools to decipher the roles of GLUT4 in the control of glucose homeostasis.

关键词： Glucose transporter 4 Knockout Knockdown Transgene Overexpression Insulin

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The Forward Solution of The Electrical Field Due To Point Source In Layered Media

The Forward Solution of The Electrical Field Due To Point So...

引用

International Symposium on Computer Applications in geoscience

作者： ge Wcizhong hu Xinfa (Gulin College of geology Guilin)

＜正＞The forward solution of the electrical field dur to a point source in layered media is used to either the ground electrical exploration on vertical multi-layered media or the underground dectrical exploration in horizon- tal multi-layered *** to the boundary conditions,we derive two groups of recurrence expressions to find the coeffcients to be determined in the integral expressions for electrical *** the layer parameters into the first group of the recurrence formulas,we obtain the coefficients to be determined in the ex- pression for the layer,in which the point source is ***,the coefficients to be determined in the expres- sion for oter layers are obtained in terms of the second group of recurrence *** to the Gauss-Laguerre integral formula,we calculate the *** programs designed on the microcomputer or pocket computer can be used to fast calculate the apparent resistivity for any electrode configuration,any number of medium layers and arbitrary orientation of electrode（normal to,oblique to and parallel with the interface strike）

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Oroxyloside protects against dextran sulfate sodium-induced colitis by inhibiting ER stress via PPARγ activation

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Chinese Journal of Natural Medicines 2024年第4期22卷 307-317页

作者： TAO Lei DOU Renjie CHEN Xueming CAO Yu DAI Zhen hu Ziyan MA Zhi ge Xiaoming ZHANG Ling WANG Xiaoping Nanjing Institute for Food and Drug Control Nanjing 211198China State Key Laboratory of Natural Medicines School of Basic Medicine and Clinical PharmacyChina Pharmaceutical UniversityNanjing 211198China

Ulcerative colitis (UC), a prevalent form of inflammatory bowel disease (IBD), may result from immune system dysfunction, leading to the sustained overproduction of reactive oxygen species (ROS) and subsequent cellular oxidative stress damage. Recent studies have identified both peroxisome proliferator-activated receptor-γ (PPARγ) and endoplasmic reticulum (ER) stress as critical targets for the treatment of IBD. Oroxyloside (C22H20O11), derived from the root of Scutellaria baicalensis georgi, has traditionally been used in treating inflammatory diseases. In this study, we investigated the molecular mechanisms by which oroxyloside mitigates dextran sulfate sodium (DSS)-induced colitis. We examined the effects of oroxyloside on ROS-mediated ER stress in colitis, including the protein expressions of GRP78, p-PERK, p-eIF2α, ATF4, and CHOP, which are associated with ER stress. The beneficial impact of oroxyloside was reversed by the PPARγ antagonist GW9662 (1 mg·kg^(−1), i.v.) in vivo. Furthermore, oroxyloside decreased pro-inflammatory cytokines and ROS production in both bone marrow-derived macrophages (BMDM) and the mouse macrophage cell line RAW 264.7. However, PPARγ siRNA transfection blocked the anti-inflammatory effect of oroxyloside and even abolished ROS generation and ER stress activation inhibited by oroxyloside in vitro. In conclusion, our study demonstrates that oroxyloside ameliorates DSS-induced colitis by inhibiting ER stress via PPARγ activation, suggesting that oroxyloside might be a promising effective agent for IBD.

关键词： Oroxyloside ER stress PPARγ Colitis

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Design of bifunctional single-atom catalysts NiSA/ZIF-300 for CO_(2) conversion by ligand regulation strategy

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Nano Research 2024年第5期17卷 3827-3834页

作者： Wengang Fu Yapei Yun Hongting Sheng Xiaokang Liu Tao Ding Shuxian hu Tao Yao Binghui ge Yuanxin Du Didier Astruc Manzhou Zhu Department of Chemistry and Centre for Atomic Engineering of Advanced Materials Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationCollege of Materials Science and EngineeringInstitutes of Physical Science and Information Technology and Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized MaterialsAnhui UniversityHefei 230601China Universitéde Bordeaux ISMUMR CNRS N°5255351 Cours de La Libération33405 Talence CedexFrance National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230026China Department of Physics University of Science and Technology BeijingBeijing 100083China Anhui Tongyuan Environment Energy Saving Co. LtdHefei 230041China

Carbon-supported noble-metal-free single-atom catalysts(SACs)have aroused widespread interest due to their green chemistry aspects and excellent ***,we propose a“ligand regulation strategy”and achieve the successful fabrication of bifunctional SAC/MOF(MOF=metal-organic framework)nanocomposite(abbreviated NiSA/ZIF-300;ZIF=ZIF-8)with exceptional catalytic performance and *** designed NiSA/ZIF-300 has a planar interfacial structure with the Ni atom,involving one S and three N atoms bonded to Ni(Ⅱ),fabricated by controllable pyrolysis of volatile Ni-S *** CO_(2) cycloaddition to styrene epoxide,NiSA/ZIF-300 exhibits ultrahigh activity(turnover number(TON)=1.18×105;turnover frequency(TOF)=9830 molSC·mol_(Ni)^(-1)·h^(-1);SC=styrene carbonate)and durability at 70℃ under 1 atm CO_(2) pressure,which is much superior to Ni complex/ZIF,NiNP/ZIF-300,and most reported *** study offers a simple method of bifunctional SAC/MOF nanocomposite fabrication and usage,and provides guidance for the precise design of additional original SACs with unique catalytic properties.

关键词： single atom catalyst bifunctional CO_(2)conversion cycloaddition

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Surface Acidity/Basicity and Catalytic Reactivity of CeO2/7-Al2O3 Catalysts for the Oxidative Dehydrogenation of Ethane with Carbon Dioxide to Ethylene

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Journal of Natural Gas Chemistry 2003年第2期12卷 119-122页

作者： Xin ge, Shenghua hu, Qing Sun. Jianyi ShenSchool of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

Dehydrogenation of ethane to ethylene in CO_2 was investigated overCeO_2/γ-Al_2O_3 catalysts at 700℃ in a conventional flow reactor operating at atmosphericpressure. XRD, BET and microcalori-metric adsorption techniques were used to characterize thestructure and surface acidity/basicity of the CeO_2/γ-Al_2O_3 catalysts. The results show that thesurface acidity decreased while the surface basicity increased after the addition of CeO_2 toγ-Al_2O_3. Accordingly, the activity of the hydrogenation reaction of CO_2 increased, which mightbe responsible for the enhanced conversion in the dehydrogenation of ethane to ethylene. The highestethane conversion obtained was about 15% for the 25%CeO_2/γ-Al_2O_3. The selectivity to ethylenewas high for all the CeO_2, γ-Al_2O_3 and CeO2/γ-Al_2O_3 catalysts.

关键词： CeO_2/γ-Al_2O_3 catalysts ethane dehydrogenation ethylene carbon dioxide

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