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How to manage the malposition of deep vein catheterization into the artery?

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Journal of Geriatric Cardiology 2024年第6期21卷 682-685页

作者： Jun-Na SUN Hai DONG Peng CHEN Zi-Qi LI Li-You SUI Bin QI quan-Min jing Department of Cardiovascular Diseases the First Affiliated Hospital of Henan University of Chinese MedicineZhengzhouChina Department of Cardiology General Hospital of Northern Theater CommandShenyangChina

Central venous catheterization establishes temporary,efficient,and rapid use of deep venous access in patients,which provides high flow rate fluid perfusion,enables measurement of central venous pressure,and acts as an important reference for clinical ***,various complications such as pneumothorax,hemothorax,hematoma,and puncture failure can easily occur during the puncture and catheterization process.

关键词： process enable catheter

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冬奇子口服液延缓皮肤衰老的实验研究

时珍国医国药 2012年第6期23卷 1344-1346页

作者：宋琳琳赵宏沙靖全张磊佳木斯大学药学院黑龙江佳木斯154007

目的探讨冬奇子口服液对D-半乳糖所致衰老小鼠皮肤组织衰老程度的影响及其延缓衰老的作用。方法选用昆明种小鼠50只,雌雄各半,随机分为冬奇子口服液低、中、高剂量组(剂量分别为0.1,0.2,0.3 ml/20 g),模型组和正常对照组;除正常对照组... 详细信息

目的探讨冬奇子口服液对D-半乳糖所致衰老小鼠皮肤组织衰老程度的影响及其延缓衰老的作用。方法选用昆明种小鼠50只,雌雄各半,随机分为冬奇子口服液低、中、高剂量组(剂量分别为0.1,0.2,0.3 ml/20 g),模型组和正常对照组;除正常对照组注射等量生理盐水外,其他组均采用颈背部皮下注射D-半乳糖(剂量为0.1 ml/20 g)法复制亚急性衰老模型,连续42 d。各给药组造模的同时皮肤涂布给药,42 d后取各组小鼠背部皮肤检测含水量、羟脯氨酸(HYP)含量及超氧化物歧化酶(SOD)活力和丙二醛(MDA)含量。结果冬奇子口服液可保持皮肤组织水分,明显提高亚急性衰老小鼠皮肤中SOD活性以及HYP含量,并使皮肤MDA含量降低。结论冬奇子口服液具有延缓皮肤衰老作用。

关键词：冬奇子口服液皮肤衰老小鼠

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苍耳草中总酚酸的含量测定及其抗炎作用研究

时珍国医国药 2013年第10期24卷 2331-2332页

作者：宋琳琳沙靖全赵宏赵岩佳木斯大学药学院黑龙江佳木斯154007

目的建立苍耳草总酚酸的含量测定方法并探讨其抗炎作用。方法用绿原酸做对照品,用50%甲醇溶液定容,采用紫外分光光度法在426 nm处测定吸光度;以阿司匹林为阳性对照,采用二甲苯致小鼠耳廓肿胀法来观察苍耳草的抗炎作用。结果苍耳草药材... 详细信息

目的建立苍耳草总酚酸的含量测定方法并探讨其抗炎作用。方法用绿原酸做对照品,用50%甲醇溶液定容,采用紫外分光光度法在426 nm处测定吸光度;以阿司匹林为阳性对照,采用二甲苯致小鼠耳廓肿胀法来观察苍耳草的抗炎作用。结果苍耳草药材的平均含量为5.22%,RSD=0.17%,并且能明显减轻二甲苯所致的小鼠耳廓肿胀,与生理盐水组比较有显著性差异(P<0.01)。结论实验中建立的方法方便准确,可用于苍耳草总酚酸的含量测定并显示具有明显的抗炎作用。

关键词：苍耳草总酚酸紫外分光光度法抗炎

Optical vortex array:generation and applications[Invited]

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Chinese Optics Letters 2024年第2期22卷 3-16页

作者：杜竫权志强李康王健 Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Optics Valley Laboratory Wuhan 430074China

Optical vortex arrays,with their unique wavefront structures,find extensive applications in fields such as optical communications,trapping,imaging,metrology,and *** methods used to generate these vortex beam arrays are crucial for their *** this review,we begin with introducing the fundamental concepts of optical vortex ***,we present three methods for generating them,including diffractive optical elements,metasurfaces,and integrated optical *** then explore the applications of optical vortex beam arrays in five different ***,we conclude with a summary and outlook for the research on optical vortex beam arrays.

关键词： optical vortex array topological charge number orbital angular momentum vector beam

One-step controlled electrodeposition nickel sulfides heterointerfaces favoring the desorption of hydroxyl groups for efficient hydrogen generation

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Rare Metals 2024年第9期43卷 4377-4386页

作者： Ru-Chun Li Xin-Yue Zhang Ze-Yue Qu Feng-Yi Liu quan-Qing Xu Zhao-Xia Hu jing-Wei Li Mohamed-Nawfal Ghazzal Jin-Li Yu Faculty of Chemistry and Chemical Engineering Yunnan Normal UniversityKunming 650500China Foshan Gaoke Hechuang Technology Co. Ltd.Foshan 528200China School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China Universite Paris-Saclay UMR 8000 CNRSInstitut de Chimie PhysiqueOrsay 91405France Department of Chemistry City University of Hong KongHong Kong 999077China

The heterointerface engineering involving different components or phases represents a desirable strategy for enhancing the sluggish kinetics of hydrogen evolution reaction(HER).However,constructing desired heterointerfaces and elucidating the reaction mechanisms on the interface remains a considerable *** this work,we propose a straightforward electrochemical synthesis strategy to prepare the nickel sulfide-based heterointerfaces for *** mechanism of electrochemical synthesis is revealed,wherein metal-thiourea species can be formed at the cathode potential and subsequently oxidized to nickel sulfides at the anode *** this mechanism,a range of nickel sulfides,including NiS,Ni_(3)S_(2)/NiS,Ni/Ni_(3)S_(2)and Ni_(3)S_(2),have been successfully synthesized by tuning the potential range of cyclic *** these,the obtained Ni_(3)S_(2)/NiS@CC(CC:carbon cloth)exhibits the smallest overpotential of84 mV at 10 mA·cm^(-2)and high *** calculations further reveal that the combination of NiS and Ni_(3)S_(2)induces electron redistribution at the interface,and thus the Volmer process is effectively promoted with faster water dissociation and OH desorption ***,the simplicity method coupled with a clear synthesis mechanism and outstanding HER performance highlights its promising potential for practical applications.

关键词： Hydrogen evolution reaction Heterointerfaces OH desorption kinetics Electrochemical synthesis

5S-Heudelotinone alleviates experimental colitis by shaping the immune system and enhancing the intestinal barrier in a gut microbiota-dependent manner

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Acta Pharmaceutica Sinica B 2024年第5期14卷 2153-2176页

作者： Qing Meng Jianshuang Guo Ke Lv Yang Liu Jin Zhang Mingyue Li Xirui Cheng Shenghua Chen Xiaoguang Huo quan Zhang Yue Chen jing Li State Key Laboratory of Medicinal Chemical Biology College of PharmacyNankai UniversityTianjin 300353China College of Chemistry and Frontiers Science Center for New Organic Matter Haihe Laboratory of Sustainable Chemical TransformationsNankai UniversityTianjin 300071China Accendatech Company Ltd.Tianjin 300193China

Aberrant changes in the gut microbiota are implicated in many diseases,including inflammatory bowel disease(IBD).Gut microbes produce diverse metabolites that can shape the immune system and impact the intestinal barrier integrity,indicating that microbe-mediated modulation may be a promising strategy for preventing and treating *** fecal microbiota transplantation and probiotic supplementation are well-established IBD therapies,novel chemical agents that are safe and exert strong effects on the gut microbiota are urgently ***,we report the total synthesis of heudelotinone and the discovery of 5S-heudelotinone(an enantiomer)as a potent agent against experimental colitis that acts by modulating the gut microbiota.5S-Heudelotinone alters the diversity and composition of the gut microbiota and increases the concentration of short-chain fatty acids(SCFAs);thus,it regulates the intestinal immune system by reducing proinflammatory immune cell numbers,and maintains intestinal mucosal integrity by modulating tight junctions(TJs).Moreover,5S-heudelotinone(2)ameliorates colitis-associated colorectal cancer(CAC)in an azoxymethane(AOM)/dextran sulfate sodium(DSS)-induced in situ carcinoma ***,these findings reveal the potential of a novel natural product,namely,5S-heudelotinone,to control intestinal inflammation and highlight that this product is a safe and effective candidate for the treatment of IBD and CAC.

关键词： 5S-heudelotinone Total synthesis Inflammatory bowel disease Gut microbiota Short-chain fatty acids Immune system Intestinal barrier Drug discovery

Meiotic transcriptional reprogramming mediated by cell-cell communications in humans and mice revealed by scATACseq and scRNA-seq

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Zoological Research 2024年第3期45卷 601-616页

作者： Hai-quan Wang Xiao-Long Wu jing Zhang Si-Ting Wang Yong-Juan Sang Kang Li Chao-Fan Yang Fei Sun Chao-Jun Li State Key Laboratory of Reproductive Medicine and Offspring Health Center for Global HealthSchool of Public HealthNanjing Medical UniversityNanjingJiangsu 211166China Medical School Nanjing UniversityNanjingJiangsu 210093China Zhejiang University School of Medicine HangzhouZhejiang 310016China Department of Urology and Andrology Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhouZhejiang 310000China Model Animal Research Center of Medical School Nanjing UniversityNanjingNanjingJiangsu 210093China Liangzhu Laboratory Zhejiang UniversityHangzhouZhejiang 311121China

Meiosis is a highly complex process significantly influenced by transcriptional ***,studies on the mechanisms that govern transcriptomic changes during meiosis,especially in prophase I,are ***,we performed single-cell ATAC-seq of human testis tissues and observed reprogramming during the transition from zygotene to pachytene *** event,conserved in mice,involved the deactivation of genes associated with meiosis after reprogramming and the activation of those related to spermatogenesis before their functional ***,we identified 282 transcriptional regulators(TRs)that underwent activation or deactivation subsequent to this *** suggested that physical contact signals from Sertoli cells may regulate these TRs in spermatocytes,while secreted ENHO signals may alter metabolic patterns in these *** results further indicated that defective transcriptional reprogramming may be associated with non-obstructive azoospermia(NOA).This study revealed the importance of both physical contact and secreted signals between Sertoli cells and germ cells in meiotic progression.

关键词： Single-cell RNA-seq Single-cell ATAC-seq Spermatogenesis Meiosis Transcriptional reprogramming Cell-cell communication

High quality repair of osteochondral defects in rats using the extracellular matrix of antler stem cells

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World Journal of Stem Cells 2024年第2期16卷 176-190页

作者： Yu-Su Wang Wen-Hui Chu jing-Jie Zhai Wen-Ying Wang Zhong-Mei He quan-Min Zhao Chun-Yi Li Institute of Antler Science and Product Technology Changchun Sci-Tech UniversityChangchun 130000Jilin ProvinceChina College of Chinese Medicinal Materials Jilin Agricultural UniversityChangchun 130118Jilin ProvinceChina School of Life Science Taizhou UniversityTaizhou 318000Zhejiang ProvinceChina Department of Oral Implantology Hospital of StomatologyJilin UniversityChangchun 130000Jilin ProvinceChina

BACKGROUND Cartilage defects are some of the most common causes of *** lesions caused by inflammation,trauma or degenerative disease normally result in osteochondral *** studies have shown that decellularized extracellular matrix(ECM)derived from autologous,allogenic,or xenogeneic mesenchymal stromal cells(MSCs)can effectively restore osteochondral *** To determine whether the decellularized ECM of antler reserve mesenchymal cells(RMCs),a xenogeneic material from antler stem cells,is superior to the currently available treatments for osteochondral *** We isolated the RMCs from a 60-d-old sika deer antler and cultured them in vitro to 70%confluence;50 mg/mL L-ascorbic acid was then added to the medium to stimulate ECM *** sheets of adipocyte-derived MSCs(aMSCs)and antlerogenic periosteal cells(another type of antler stem cells)were used as the *** weeks after ascorbic acid stimulation,the ECM sheets were harvested and applied to the osteochondral defects in rat knee *** The defects were successfully repaired by applying the *** highest quality of repair was achieved in the RMC-ECM group both in vitro(including cell attachment and proliferation),and in vivo(including the simultaneous regeneration of well-vascularized subchondral bone and avascular articular hyaline cartilage integrated with surrounding native tissues).Notably,the antler-stem-cell-derived ECM(xenogeneic)performed better than the aMSC-ECM(allogenic),while the ECM of the active antler stem cells was superior to that of the quiescent antler stem *** Decellularized xenogeneic ECM derived from the antler stem cell,particularly the active form(RMC-ECM),can achieve high quality repair/reconstruction of osteochondral defects,suggesting that selection of decellularized ECM for such repair should be focused more on bioactivity rather than kinship.

关键词： Osteochondral defect repair Mesenchymal stem cells Extracellular matrix Decellularization Antler stem cells Reserve mesenchymal cells Xenogeneic

Cassiterite U-Pb dating of the Yelonggou pegmatite-type lithium deposit in western Sichuan and its metallogenic age constraints

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China Geology 2024年第1期7卷 153-156页

作者： Xiang-yuan Yue Qian Zhang Jun-jun Zhang Wei Zhang jing Zhang Zhi-quan Jia Li-ping Luo Institute of Multipurpose Utilization of Mineral Resources Chinese Academy of Geological SciencesChengdu610041China shandong Lunan Geology and Exploration Institute(No.2 Brigade of shandong BGMR) Jining272100China Sichuan Shudao Advanced Material Science Group Co.Ltd. Chengdu610041China No.3 Geological Brigade of Sichuan Province Chongzhou611230China

*** Pegmatite hosts important resource of rare metals,e.g.,lithium(Li)and beryllium(Be).In recent years,increasingly more studies were dedicated to characterize and unravel the formation of pegmatite-type deposits,for which accurate dating of pegmatite formation and mineralization is *** Songpan-Ganzi orogenic belt is a major rare metal metallogenic belt in China,hosting many important pegmatite-type Li deposits,including the Lijiagou,Dangba,Jiajika,Yelonggou,Cuola,and *** age data(mica Ar-Ar and zircon/cassiterite U-Pb)from these Li deposits are sparse,ranging from 210 to 152 ***,obtaining reliable zircon U-Pb dates can be a challenge due to the strong decidualization in *** a result,the formation and mineralization ages of these rare metal pegmatites remain controversial,which hampers the development of pegmatite-type metallogenic model for the Songpan-Ganzi orogenic belt.

关键词： dating metallogenic zircon