检索结果-南通市图书馆

Synthesis, Structures, Fluorescence and Magnetism of Two Lanthanide Metal-organic Frameworks with CaF2 Topology Based on Silicon-centered Tetrahedral Ligand

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

Chemical Research in Chinese Universities 2013年第4期29卷 611-616页

作者： LI Yang-xue xue Ming huang lin CHEN Si-ru QIU Shi-lun State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin University Changchun 130012 P. R. China

Two 3D multifunctional lanthanide metal-organic frameworks（MOFs）, Pr（HTCPS）（H20）·2DMF·C2H2OH·5H2O（JUC-93） and Pr3（TCPS）2（NO3）（H2O）4（DMA）2.2DMA.C2H5OH.3H2O（JUC-94）[H4TCPS=tetrakis（4-carboxyphenyl）- silane, DMF=N,N＇-dimethylformamide, DMA=N,N＇-dimethylacetamide and JUC=Jilin University China] were synthe- sized by the self-assembly of a rigid silicon-centered tetrahedral carboxylate ligand H4TCPS and Pr（III） ions in different solvothermal reactions. X-Ray crystallography revealed that they exhibited a rare CaFE topology framework, constructed from the 4-connected tetrahedral TCPS unit with the 8-connected dinuclear praseodymium cluster unit and trinuclear praseodymium cluster unit, respectively. In addition, the luminescent and magnetic properties of the two compounds were investigated.

关键词： Metal-organic framework Tetrakis(4-carboxyphenyl)silane CaF2 topology Magnetic property Fluores- cence

Cobalamin-dependent radical S-adenosyl-L-methionine protein functions with a partner to successively methylate tricyclic indole alkaloid for chuangxinmycin maturation and derivatization

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

Science China Chemistry 2025年第1期68卷 308-316页

作者： Sili Wang Jiancheng huang Yanan Du Wei huang Yufeng xue Xiaokun Xu Guannan Zhong Yuanyuan Shi Bin Hong Xiaoying Bian Wen Liu State Key Laboratory of Chemical Biology Shanghai Institute of Organic Chemistry University of Chinese Academy of SciencesChinese Academy of Sciences State Key Laboratory of Microbial Technology Shandong University National Health Commission (NHC) Key Laboratory of Biotechnology for Microbial Drugs Institute of Medicinal BiotechnologyChinese Academy of Medical Science & Peking Union Medical College

Cobalamin(Cbl)-dependent radical S-adenosyl-L-methionine(SAM) proteins constitute the largest collection of the radical SAM superfamily that has hundreds of thousands of individual members. Many of these proteins are involved in the biosynthesis of pharmaceutically important natural products to catalyze chemically demanding reactions. In the biosynthetic pathway of chuangxinmycin(CXM), a unique indole alkaloid antibiotic with potent anti-infective activity, functionalization of the characteristic thiopyrano[4,3,2-cd]indole scaffold by regio-and stereoselective C3-methylation is believed to rely on a Cbl-dependent radical process, which, however, remained to be reconstituted biochemically. We here report the dissection of this enzymatic process, which requires the incorporation of Cxm8, a Cbl-dependent radical SAM protein, with Cxm9, a DUF5825family protein that shares no homology to any proteins of known functions. Cxm8 and Cxm9 function together by forming an unexpected heterodimeric complex that selectively catalyzes C3-methylation of the tricyclic indole-S-hetero ring system in a successive manner, achieving CXM and a recently identified, C3-dimethylated congener. Detailed biochemical characterization,isotope labeling, structural simulation and bioinformatics analysis rationalized the catalysis of the Cxm8/Cxm9 complex and particularly the necessity of the DUF5825 protein for C3-methylase activity. This is the first example that a Cbl-dependent protein acts with a partner to exhibit radical SAM activity.

关键词： cbl-dependent radical SAM protein biosynthesis chuangxinmycin stereoselective methylation

PD-YOLO:Colon Polyp Detection Model Based on Enhanced Small-Target Feature Extraction

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2025年第1期82卷 913-928页

作者： Yicong Yu Kaixin lin Jiajun Hong Rong-Guei Tsai Yuanzhi huang New Engineering Industry College Putian UniversityPutian351100China Engineering Research Center of Big Data Application in Private Health Medicine(Putian University) Fujian Province UniversityPutian351100China Computer College Guangdong University of Science&TechnologyDongguan523668China

In recent years,the number of patientswith colon disease has increased *** polyps are the precursor lesions of colon *** not diagnosed in time,they can easily develop into colon cancer,posing a serious threat to patients’lives and health.A colonoscopy is an important means of detecting colon ***,in polyp imaging,due to the large differences and diverse types of polyps in size,shape,color,etc.,traditional detection methods face the problem of high false positive rates,which creates problems for doctors during the diagnosis *** order to improve the accuracy and efficiency of colon polyp detection,this question proposes a network model suitable for colon polyp detection(PD-YOLO).This method introduces the self-attention mechanism CBAM(Convolutional Block Attention Module)in the backbone layer based on YOLOv7,allowing themodel to adaptively focus on key information and ignore the unimportant *** help themodel do a better job of polyp localization and bounding box regression,add the SPD-Conv(Symmetric Positive Definite Convolution)module to the neck layer and use deconvolution instead of *** results indicate that the PD-YOLO algorithm demonstrates strong robustness in colon polyp *** to the original YOLOv7,on the Kvasir-SEG dataset,PD-YOLO has shown an increase of 5.44 percentage points in AP@0.5,showcasing significant advantages over other mainstream methods.

关键词： Polyp detection YOLOv7 SPD-Conv CBAM deconvolution

Curative effects of probing alone and probing combined with nasolacrimal injection of levofloxacin ophthalmic gel on congenital duct obstruction of children from 3–12 months of age

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

Eye Science 2016年第2期31卷 78-85页

作者： Wei Sun Sui-Fang Chen Jing Li Huan-Huan Zhao Su-Zhen Xie xue-lin huang Shu-Ke Luo Guangdong Women and Children Hospital Guangzhou 510000China The second people's Hospital of Foshan Foshan 528000China

Background:To investigate the 1-time success rate of probing alone and nasolacrimal duct probing combined with nasolacrimal injection of levofloxacin ophthalmic gel on congenital nasolacrimal duct obstruction(CNLDO)in young ***:A retrospective case series was performed on 494 cases(647 eyes)of 3–12 month-old children with CNLDO between July 2014 and July *** obtained from the lacrimal sac was cultured to isolate infectious *** testing was *** from 3–12 months of age who were found to be sensitive to Levofloxacin(n=493 eyes)were separated into two groups:3–6 months of age(276 eyes)and 7–12 months of age(217 eyes).Each of the groups were then randomized into group A(138 eyes of3–6 months of age;102 eyes of 7–12 months of age)and group B(138 eyes of 3–6 months of age;115 eyes of7–12 months of age).Children in group A underwent nasolacrimal duct probing alone;those in group B underwent nasolacrimal duct probing plus nasolacrimal duct injection of levofloxacin and the efficacy of probing was ***:The average detection rate of pathogenic bacteria in dacryocystitis was 75.1%,and Staphylococcus aureus was found to be the main pathogenic bacteria(42.59%,106 cases).Among children from 7–12 months of age,the 1-time success rate of nasolacrimal duct probing alone was 88.24%and the 1-time success rate of probing combined with nasolacrimal duct injection of levofloxacin ophthalmic gel was 96.52%(statistical significance,P=0.02<0.05).Conclusions:Most pathogenic bacteria(96.81%)were sensitive to *** duct probing combined with nasolacrimal duct injection of levofloxacin may improve the success rate of probing in children older than 6 months of age.

关键词：氧氟沙星注射液左氧氟沙星 6月龄疗效评价先天性儿童凝胶一次成功率

High Fe‑Loading Single‑Atom Catalyst Boosts ROS Production by Density Effect for Efficient Antibacterial Therapy

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 187-203页

作者： Si Chen Fang huang Lijie Mao Zhimin Zhang Han lin Qixin Yan Xiangyu Lu Jianlin Shi Department of Cardiology Shanghai Tenth People’s HospitalSchool of MedicineTongji UniversityShanghai 200092People’s Republic of China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050People’s Republic of China Shanghai Frontiers Science Center of Nanocatalytic Medicine School of MedicineTongji UniversityShanghai 200092People’s Republic of China

The current single-atom catalysts(SACs)for medicine still suffer from the limited active site ***,we develop a synthetic method capable of increasing both the metal loading and mass-specific activity of SACs by exchanging zinc with *** constructed iron SACs(h^(3)-FNC)with a high metal loading of 6.27 wt%and an optimized adjacent Fe distance of~4 A exhibit excellent oxidase-like catalytic performance without significant activity decay after being stored for six months and promising antibacterial ***,a“density effect”has been found at a high-enough metal doping amount,at which individual active sites become close enough to interact with each other and alter the electronic structure,resulting in significantly boosted intrinsic activity of single-atomic iron sites in h^(3)-FNCs by 2.3 times compared to low-and medium-loading ***,the overall catalytic activity of h^(3)-FNC is highly improved,with mass activity and metal mass-specific activity that are,respectively,66 and 315 times higher than those of commercial Pt/*** addition,h^(3)-FNCs demonstrate efficiently enhanced capability in catalyzing oxygen reduction into superoxide anion(O_(2)·^(−))and glutathione(GSH)*** in vitro and in vivo assays demonstrate the superior antibacterial efficacy of h^(3)-FNCs in promoting wound *** work presents an intriguing activity-enhancement effect in catalysts and exhibits impressive therapeutic efficacy in combating bacterial infections.

关键词： Nanocatalytic medicine Single-atom catalysts Reactive oxygen species(ROS) High metal loading Oxidase catalysis

Cholesterol metabolism: physiological versus pathological aspects in intracerebral hemorrhage

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第4期20卷 1015-1030页

作者： Ruoyu huang Qiuyu Pang Lexin Zheng Jiaxi lin Hanxi Li lingbo Wan Tao Wang Department of Forensic Science School of Basic Medicine and Biological SciencesSuzhou Medicine College of Soochow UniversitySuzhouJiangsu ProvinceChina

Cholesterol is an important component of plasma membranes and participates in many basic life functions,such as the maintenance of cell membrane stability,the synthesis of steroid hormones,and *** plays a key role in the establishment and maintenance of the central nervous *** brain contains 20%of the whole body’s cholesterol,80%of which is located within myelin.A huge number of processes(e.g.,the sterol regulatory element-binding protein pathway and liver X receptor pathway)participate in the regulation of cholesterol metabolism in the brain via mechanisms that include cholesterol biosynthesis,intracellular transport,and *** brain injuries or diseases involving crosstalk among the processes above can affect normal cholesterol metabolism to induce detrimental ***,we hypothesized that cholesterol-related molecules and pathways can serve as therapeutic targets for central nervous system *** hemorrhage is the most severe hemorrhagic stroke subtype,with high mortality and *** cholesterol levels are associated with the risk of intracerebral ***,secondary pathological changes after intracerebral hemorrhage are associated with cholesterol metabolism dysregulation,such as neuroinflammation,demyelination,and multiple types of programmed cell *** cholesterol accumulation in the brain has been found after intracerebral *** this paper,we review normal cholesterol metabolism in the central nervous system,the mechanisms known to participate in the disturbance of cholesterol metabolism after intracerebral hemorrhage,and the links between cholesterol metabolism and cell *** also review several possible and constructive therapeutic targets identified based on cholesterol metabolism to provide cholesterol-based perspectives and a reference for those interested in the treatment of intracerebral hemorrhage.

关键词： cell death cholesterol metabolism intracerebral hemorrhage myelination therapeutic target

Sulfur Fumigation,a Better or Worse Choice in Preservation of Traditional Chinese Medicine?

在线全文

学校读者我要写书评

暂无评论

Sulfur Fumigation,a Better or Worse Choice in Preservation o...

EZH2-dependent myelination following sciatic nerve injury

中药与天然药高峰论坛暨第十二届全国中药和天然药物学术研...

作者： xue Jiang,lin-Fang huang~*,Si-hao Zheng,Shi-lin Chen (Institute of Medicinal Plant Development,Chinese Academy of Medical Sciences & Peking Union Medical College,Beijing 100193,China)

Sulfur fumigation(SF)in traditional Chinese medicine(TCM)is a highly efficient and important traditional preservation method in *** method has generated a great deal of concern and has been disputed in the last few years because of its uncertain *** can alter the quality of TCMs by damaging the bioactive compounds,changing chemical profiles,and generating detrimental exogenous ***,SF is still widely used in the herbal medicinal industry because of its various benefits,such as its pesticidal and anti-bacterial effects,easy operation,and *** review contains the current situation,chemical mechanism and reactions during SF,the pharmacological and pharmacokinetic research,and the influence of quality caused by *** addition,a quantification-operation sulfur fumigation device(QOSFD),which can maintain the quality of TCMs by controlling the SF processing parameters,has been designed and *** key technologies of this device involve controlling the O content and the temperature of SO as well as the quantification of sulfur in *** device can reduce the possibility of reaction between bioactive compounds and sulfur/sulfurous acid,as well as control the limitation of SO *** QOSFD is regarded as a promising preservation technique in the field of TCM,medicinal materials,agriculture,and fruit industry.

关键词： sulfur fumigation sulfur dioxide traditional Chinese medicine preservation review

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第8期20卷 2382-2394页

作者： Hui Zhu Li Mu Xi Xu Tianyi huang Ying Wang Siyuan Xu Yiting Wang Wencong Wang Zhiping Wang Hongkui Wang Chengbin xue Research Center of Clinical Medicine Affiliated Hospital of Nantong UniversityKey Laboratory of Neuroregeneration of Jiangsu and Ministry of EducationCo-innovation Center of NeuroregenerationNMPA Key Laboratory for Research and Evaluation of Tissue Engineering Technology ProductsNantong UniversityNantongJiangsu ProvinceChina Medical School of Nantong University NantongJiangsu ProvinceChina Department of Neurology Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina Department of Rehabilitation Medicine Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina Department of Critical Care Medicine Nantong Fourth People’s HospitalNantongJiangsu ProvinceChina

Demyelination and remyelination have been major focal points in the study of peripheral nerve regeneration following peripheral nerve ***,the gene regulatory network of regenerated myelin differs from that of native *** of enhancer of zeste homolog 2(EZH2)hinders the differentiation,maturation,and myelination of Schwann cells in *** further determine the role of EZH2 in myelination and recovery post-peripheral nerve injury,conditional knockout mice lacking Ezh2 in Schwann cells(Ezh2^(fl/fl);Dhh-Cre and Ezh2^(fl/fl);Mpz-Cre)were *** results show that a significant proportion of axons in the sciatic nerve of Ezh2-depleted mice remain *** highlights the crucial role of Ezh2 in initiating Schwann cell ***,we observed that 21 days after inducing a sciatic nerve crush injury in these mice,most axons had remyelinated at the injury site in the control nerve,while Ezh2^(fl/fl);Mpz-Cre mice had significantly fewer remyelinated axons compared with their wild-type *** suggests that the absence of Ezh2 in Schwann cells impairs myelin formation and *** conclusion,EZH2 has emerged as a pivotal regulatory factor in the process of demyelination and myelin regeneration following peripheral nerve *** EZH2 activity during these processes may offer a promising therapeutic target for the treatment of peripheral nerve injuries.

关键词： demyelination EZH2 myelination peripheral nerve injury PRC2 remyelination Schwann cells sciatic nerve crush sciatic nerve transection

在线全文

学校读者我要写书评

暂无评论

家族性渗出性玻璃体视网膜病变的临床研究

国际眼科杂志 2015年第12期15卷 2161-2163页

作者：宁静静黄学林杨璇中国广东省惠州市第一妇幼保健院眼科 516001 广东省妇幼保健院眼科中国广东省广州市510010

目的:了解家族性渗出性玻璃体视网膜病变(familial exudative vitreoretinopathy,FEVR)的发病状况,探讨足月产儿眼病筛查的必要性。方法:回顾分析2014-01/2015-08我院772例1544眼足月产儿眼底检查的资料。结果:足月产儿772例1 544眼中,... 详细信息

目的:了解家族性渗出性玻璃体视网膜病变(familial exudative vitreoretinopathy,FEVR)的发病状况,探讨足月产儿眼病筛查的必要性。方法:回顾分析2014-01/2015-08我院772例1544眼足月产儿眼底检查的资料。结果:足月产儿772例1 544眼中,发现各期FEVR共8例15眼,检出率0.97%;包括1期2例2眼,2期3例5眼(含1期1例另1眼),3期2例4眼,4期1例2眼,5期1例2眼。结论:家族性渗出性玻璃体视网膜病变在新生儿眼病筛查中并不少见,甚至病情严重者在婴儿期就丧失视功能。新生儿期和婴儿期是FEVR筛查的关键时间点,早期发现、早期干预是FEVR患者获得较好视功能的关键。

关键词：新生儿眼病筛查家族性渗出性玻璃体视网膜病变视网膜疾病