检索结果-南通市图书馆

Neottia wuyishanensis(Orchidaceae:Neottieae),a new species from Fujian,China

在线全文

学校读者我要写书评

暂无评论

Plant Diversity 2021年第5期43卷 426-431页

作者： Bing-hua Chen xiao-hua Jin College of Life Sciences Fujian Normal UniversityFuzhou 350117China State Key Laboratory of Systematic and Evolutionary Botany and Herbarium Institute of BotanyChinese Academy of SciencesBeijing 100093China The Public Service Platform for Industrialization Development Technology of Marine Biological Medicine and Products of the State Oceanic Administration Fujian Key Laboratory of Special Marine Bioresource Sustainable UtilizationSouthern Institute of OceanographyCollege of Life SciencesFujian Normal UniversityFuzhou 350117China

A new species,Neottia wuyishanensis(Neottieae,Orchidaceae),is described and illustrated from Wuyishan,Fujian,eastern China,based on morphological characters and molecular *** phylogenetics indicate that *** is nested within the clade formed by Neottia fugongensis and Neottia ***,*** is similar to *** and ***,but differs from them by having indistinct auricles at the base,and in the shape and size of lobelets.

关键词： China Neottia wuyishanensis New species Orchidaceae

Bioinspiration:Pull-Out Mechanical Properties of the Jigsaw Connection of Diabolical Ironclad Beetle’s Elytra

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Solida Sinica 2023年第1期36卷 86-94页

作者： Jie Wei Bo-hua sun School of Sciences Xi’an University of Architecture and TechnologyXi’an 710055China School of Civil Engineering Xi’an University of Architecture and TechnologyXi’an 710055China Institute of Mechanics and Technology Xi’an University of Architecture and TechnologyXi’an 710055China

In engineering,connections between components are often weak *** connection methods can easily reduce the strength of components,resulting in unpredictable failure *** nature,numerous connection methods for biological structures with excellent mechanical properties have *** the connection methods of organisms in nature can inspire new ideas for bionic connection *** the diabolical ironclad beetle is under pressure,the elytra are not easy to separate,which ensures the stability of the beetle’s external structure,thus making the beetle extremely resistant to *** reason for this is the interlocking and toughening effect of the unique jigsaw connection between the ***,in this paper,a theoretical analysis model is established and used to analyze the mechanical behavior of the diabolical ironclad beetle’s jigsaw connection during the drawing process and determine the influences of factors such as quantity,angle,and geometric characteristics on the mechanical properties of the jigsaw *** results of the theoretical analysis are then compared with the results of experiments and ABAQUS finite element simulation.

关键词： Theoretical analysis Bionics Jigsaw connection 3D Printing Finite element

A new triterpene glycoside from sea cucumber Holothuria leucospilota

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

Chinese Chemical Letters 2007年第2期18卷 161-164页

作者： hua Han Yang hua Yi Ling Li xiao hua Wang Bao Shu Liu Peng sun Min Xiang Pan Research Center for Marine Drugs School of Pharmacy Second Military Medical University Shanghai 200433 China

A new triterpene glycoside, leucospilotaside A, along with a known saponin, isolated from sea cucumber Holothuria leucospilota, and its structure was elucidated as 3β-O-[4-O-sodiumsulfate-β-d-quinovopyranosyl-(1 → 2)-β-d-xylopyranosyl]-holosta-22-ketone-9-en-17α,25α-diol (1) by extensive spectroscopic analysis and chemical methods. Leucospilotaside A (1) has a ketone carbonyl group (22) in the aglycon side chain.

关键词： Sea cucumber Holothuria leucospilota Triterpene glycoside Leucospilotaside A

Abdominal aortic aneurysm： Treatment options, image visualizations and follow-up procedures

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2012年第1期9卷 49-60页

作者： Zhong-hua sun Discipline of Medical Imaging Department of lmaging and Applied Physics Curtin University Perth Western Australia 6845 Australia

Abdominal aortic aneurysm is a common vascular disease that affects elderly *** surgical repair is regarded as the gold standard technique for treatment of abdominal aortic aneurysm,however,endovaseular aneurysm repair has rapidly expanded since its first introduction in *** a less invasive technique,endovascular aneurysm repair has been confirmed to be an effective alternative to open surgical repair,especially in patients with co-morbid *** tomography （CT） angiography is currently the preferred imaging modality for both preoperative planning and post-operative follow-up.2D CT images are complemented by a number of 3D reconstructions which enhance the diagnostic applications of CT angiography in both planning and follow-up of endovascular *** has the disadvantage of high cummulative radiation dose,of particular concern in younger patients,since patients require regular imaging follow-ups after endovascular repair,thus,exposing patients to repeated radiation exposure for *** is a trend to change from CT to ultrasound surveillance of endovascular aneurysm *** image visualizations demonstrate excellent morphological assessment of aneurysm and stent-grafts,but fail to provide hemodynamic changes caused by the complex stent-graft device that is implanted into the *** article reviews the treatment options of abdominal aortic aneurysm,various image visualization tools,and follow-up procedures with use of different modalities including both imaging and computational fluid dynamics *** directions to improve treatment outcomes in the follow-up of endovascular aneurysm repair are outlined.

关键词： Abdominal aortic aneurysm Computed tomography Follow-up Stent graft Treatment Visualization.

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

裴晓华治疗急性乳腺炎经验

河南中医 2018年第3期38卷 353-355页

作者：王春晖裴晓华孙艳丽李倩北京中医药大学北京中医药大学第三附属医院北京市海淀区上地社区卫生服务中心

裴晓华教授治疗急性乳腺炎常运用瓜蒌牛蒡汤加减,同时结合揉散手法排乳、艾灸和中药外敷等外治法,疗效良好。裴老师常选用桔梗作为引经药,一般用量为6 g,与方中黄芩、连翘等解表药药效相合。裴晓华老师认为急性乳腺炎的预防远大于治疗,... 详细信息

裴晓华教授治疗急性乳腺炎常运用瓜蒌牛蒡汤加减,同时结合揉散手法排乳、艾灸和中药外敷等外治法,疗效良好。裴老师常选用桔梗作为引经药,一般用量为6 g,与方中黄芩、连翘等解表药药效相合。裴晓华老师认为急性乳腺炎的预防远大于治疗,保持乳管的通畅和良好的哺乳习惯是关键,对患者进行排空乳房、正确摆放婴儿哺乳体位以及保持乳头和乳房卫生等适当的教育,则可预防急性乳腺炎的发生。

关键词：急性乳腺炎初期瓜蒌牛蒡汤裴晓华

中国明对虾酚氧化酶原基因cDNA的克隆与表达特征

在线全文

学校读者我要写书评

暂无评论

水产学报 2010年第1期34卷 56-66页

作者：孙杰王宝杰李晓华孙姝娟刘梅蒋克勇王雷中国科学院海洋研究所中国科学院研究生院山东省花生研究所

利用3′和5′RACE技术从中国明对虾血细胞中克隆了一个酚氧化酶原基因FCproPO,FCproPO基因cDNA全长为2311bp,其中开放阅读框2061bp,编码687个氨基酸,预测分子量为78.71ku。推测的序列与凡纳滨对虾同源性为84%,与日本囊对虾同源性为71%。... 详细信息

利用3′和5′RACE技术从中国明对虾血细胞中克隆了一个酚氧化酶原基因FCproPO,FCproPO基因cDNA全长为2311bp,其中开放阅读框2061bp,编码687个氨基酸,预测分子量为78.71ku。推测的序列与凡纳滨对虾同源性为84%,与日本囊对虾同源性为71%。RT-PCR实验结果表明,FCproPO在血细胞中的相对表达量最高,在心脏和精巢中几乎不表达。序列分析发现FCproPO含有两个保守的铜离子结合位点;进化分析发现FCproPO与斑节对虾、日本囊对虾、凡纳滨对虾等海水虾的酚氧化酶原亲缘关系最近。该基因在被鳗弧菌和对虾白斑病毒(WSSV)感染后的对虾肝胰腺中的表达量显著增加,并具有不同的时空表达趋势,提示中国明对虾FCproPO基因在免疫反应中具有重要作用。

关键词：中国明对虾酚氧化酶原基因克隆表达

Impacts of channel morphology on residues and ecological risks of polychlorinated biphenyls in water and sediment in Chahe River

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Water Science and Engineering 2016年第4期9卷 300-311页

作者： Zhen-hua Zhao Jie sun xiao-kun Fang Li-ling Xia Javid Hussain Department of Plant Soil and Microbial Sciences Michigan State University East Lansing MI 48824 USA Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education Hohai University Nanjing 210098 China College of Environment Hohai University Nanjing 210098 China Nanjing Institute of Industry Technology Nanjing 210016 China

The impacts of channel morphology on the residues and ecological risks of 14 polychlorinated biphenyl(PCB) congeners in water and sediment were investigated in summer(July) and autumn(September) in the Chahe River,in Nanjing,*** residual concentrations of trichlorobiphenyls(tri-CBs,PCB 18) and tetra-CBs(PCB 52) in water were significantly higher than those of penta-CBs to deca-CBs,and the average residual concentration of ∑PCBs(sum of 14 PCB congeners) in summer was about six times higher than in ***,the residues in sediment did not change *** analysis(RDA) indicated that channel morphology and the corresponding environmental indices had significant impacts on PCB residues and their composition profiles in water and *** overflow weir and lake-type watercourse may remarkably reduce the residual concentration and ecological risks of PCBs in *** highest reduction percentages of the residual concentration and ecological risks of ∑PCBs induced by an overflow weir were 78%and 67%,respectively,and those induced by a lake-type watercourse were 36%and 70%,*** watercourses with different channel morphologies were ranked by residual ∑PCBs concentrations in the following descending order:the natural ecological watercourse,vertical concrete watercourse,and vegetation-type riprap ***,they were ranked by residual ∑PCBs concentrations in sediment in the following descending order:the vertical concrete watercourse,vegetation-type riprap watercourse,and natural ecological watercourse.

关键词： Channel morphology RDA Ecological risk Toxic equivalent concentration

Expression and activity of inducible nitric oxide synthase and endothelial nitric oxide synthase correlate with ethanolinduced liver injury

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2006年第15期12卷 2375-2381页

作者： Guang-Jin Yuan xiao-Rong Zhou Zuo-Jiong Gong Pin Zhang xiao-Mei sun Shi-hua Zheng Department of Infectious Diseases Renmin Hospital of Wuhan UniversityWuhan 430060 Hubei Province China

AIM： To study the expression and activity of inducible nitric oxide synthase （iNOS） and endothelial nitric oxide synthase （eNOS） in rats with ethanol-induced liver injury and their relation with liver damage, activation of nuclear factor-KB （NF-κB） and tumor necrosis factor-α （TNF-α） expression in the liver. METHODS： Female Sprague-Dawley rats were given fish oil （0.5 mL） along with ethanol or isocaloric dextrose daily via gastrogavage for 4 or 6 wk. Liver injury was assessed using serum alanine aminotransferase （ALT） activity and pathological analysis. Liver malondialdehyde （MDA）, nitric oxide contents, iNOS and eNOS activity were determined. NF-κB p65, iNOS, eNOS and TNF-α protein or mRNA expression in the liver were detected by immunohistochemistry or reverse transcriptase-polymerase chain reaction （RT-PCR）. RESULTS： Chronic ethanol gavage for 4 wk caused steatosis, inflammation and necrosis in the liver, and elevated serum ALT activity. Prolonged ethanol administration （6 wk） enhanced the liver damage. These responses were accompanied with increased lipid peroxidation, NO contents, iNOS activity and reduced eNOS activity. NF-κB p65, iNOS and TNF-α protein or mRNA expression were markedly induced after chronic ethanol gavage, whereas eNOS mRNA expression remained unchanged. The enhanced iNOS activity and expression were positively correlated with the liver damage, especially the necro-inflammation, activation of NF-KB, and TNF-α mRNA expression. CONCLUSION： iNOS expression and activity are induced in the liver after chronic ethanol exposure in rats, which are correlated with the liver damage, especially the necro-inflammation, activation of NF-KB and TNF-α expression, eNOS activity is reduced, but its mRNA expression is not affected.

关键词： Alcoholic liver disease Inducible nitric oxide synthase Endothelial nitric oxide synthase Nuclear factor-κB

Rare metals preparation by electro-reduction of solid compounds in high-temperature molten salts

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

Rare Metals 2016年第8期35卷 581-590页

作者： Wei xiao Di-hua Wang School of Resource and Environmental Sciences Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy Wuhan University

Direct electro-reduction of solid compounds in molten salts is a simple and straightforward electrolytic metallurgical method, which outperforms traditional pyrometallurgical methods such as carbothermic and met- allothermic reductions in terms of economic viability, energy efficiency and carbon footprint. To better highlight the features of the direct electro-reduction of solid com- pounds in molten salts in extraction of rare metals, the scope of this paper is focused on the know-how of the cathodic process of the direct electro-reduction of solid compounds in molten salts in extraction of rare refractory metals including Ti, Zr, Hf, V, Nb, Ta, Mo and W, and rare disperse metals including Ga and Ge. In line with an introduction of the basic concept of the method, the char- acteristics of reaction paths in different systems are sum- marized and the corresponding strategy on tailoring energy efficiency and microstructure of electrolytic products are rationalized. The economic competence of the method might be enhanced by extending the method to controllable production of rare metals with high added values, well- defined microstructure and intriguing functionality.

关键词： Rare metals Molten salt electrolysis Solidcompounds Electrochemical metallurgy