检索结果-南通市图书馆

On the Jebsen-Birkhoff Theorem in a Born-Infeld Type Theory of Gravity

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 High Energy Physics, Gravitation and Cosmology 2019年第4期5卷 1051-1056页

作者： tiago de oliveira rosa Maria Emilia Xavier Guimar&atilde es Rocco Pascale Neto Joaquim Lopes Neto Instituto Federal Goiano Campus Urutaí Rodovia Geraldo Silva Nascimento Urutaí Brazil Instituto de Física Universidade Federal Fluminense Niterói Brazil Instituto de Física Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil

In this paper we work with a special theory of gravity|the Novello-Di Lorenci-Luciane (hereby called NDL theory) which extends the Feynman-deser standard theoretical-fi eld approach to General Relativity. In the so-called NDL theory, matter interacts universally with gravity in accordance with the Weak Equivalence Principle, while gravitons have a nonlinear self-interaction. Our main aim in this work is to show that, though the NDL theory does not admit a Schwarzschild solution, the Jebsen-Birkhoff theorem is still valid in this framework.

关键词： Electrostatic Trapping Bootstrap Current Mitigation Peeling-Ballooning Mode

Capsule endoscopy and panendoscopy:A journey to the future of gastrointestinal endoscopy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2024年第10期30卷 1270-1279页

作者： Bruno rosa JoséCotter department of Gastroenterology Hospital da Senhora da OliveiraGuimarães 4835-044Portugal Life and Health Sciences Research Institute School of MedicineUniversity of MinhoBraga 4710-057Portugal ICVS/3B's PT Government Associate LaboratoryBraga 4710-057Portugal

In 2000,the small bowel capsule revolutionized the management of patients with small bowel ***,the technological development achieved by the new models of double-headed endoscopic capsules,as miniaturized devices to evaluate the small bowel and colon[pan-intestinal capsule endoscopy(PCE)],makes this non-invasive procedure a disruptive concept for the management of patients with digestive *** technology is expected to identify which patients will require conventional invasive endoscopic procedures(colonoscopy or balloon-assisted enteroscopy),based on the lesions detected by the capsule,i.e.,those with an indication for biopsies or endoscopic *** use of PCE in patients with inflammatory bowel diseases,namely Crohn’s disease,as well as in patients with iron deficiency anaemia and/or overt gastrointestinal(GI)bleeding,after a non-diagnostic upper endoscopy(esophagogastroduodenoscopy),enables an effective,safe and comfortable way to identify patients with relevant lesions,who should undergo subsequent invasive endoscopic *** recent development of magnetically controlled capsule endoscopy to evaluate the upper GI tract,is a further step towards the possibility of an entirely non-invasive assessment of all the segments of the digestive tract,from mouth-to-anus,meeting the expectations of the early developers of capsule endoscopy.

关键词： Non-invasive endoscopy Panendoscopy Magnetically controlled capsule endoscopy Crohn’s disease Digestive bleeding

In Silico and in Vitro Analysis of Pyrazolone derivatives against Zika Virus and Identification of Potential NS5 Methyltransferase Inhibitors by Molecular Docking

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 Biosciences and Medicines 2024年第7期12卷 214-229页

作者： Luciene Soares Silva tiago Soares Barbosa Maria Leonisa Sanchez-Nuñez Aldenise Mont Serrat rosa da Silva Vitor Won-Held Rabelo Leonardo dos Santos Corrêa Amorim Leonardo Alves Miceli Percilene Fazolin Vegi Alice Bernardino Helena Carla Castro Izabel Christina Nunes de Palmer Paixão Science and Biotechnology Graduate Program Department of Cellular and Molecular Biology Institute of Biology Fluminense Federal University Niteri Brazil Science and Biotechnology Graduate Program Department of Cellular and Molecular Biology Institute of Biology Fluminense Federal University Niterói Brazil Laboratory of Antibiotics Biochemistry Teaching and Molecular Modeling Institute of Biology Fluminense Federal University Niterói Brazil Laboratory of Organic Chemistry at the Institute of Chemistry Institute of Biology Fluminense Federal University Niterói Brazil

Zika virus (ZIKV), a mosquito-borne flavivirus, has been associated with benign infections for decades. However, it has become a public health concern due to its association with severe fetal and neurological complications. Although many efforts have been made to control ZIKV infection, approved vaccines or antiviral drugs are still lacking. Consequently, the development of new effective anti-ZIKV agents is urgently needed. In this context, we investigated the antiviral potential of pyrazolone derivatives against ZIKV replication using in silico and in vitro methods. The four pyrazolone derivatives evaluated (1a, 1b, 1c, and 1d) inhibited over 50% of ZIKV replication with low cytotoxicity. Among them, compound 1b exhibited the most potent activity (EC50 = 4.3 μM) and the highest selectivity (SI = 342). Mechanism of action studies indicated that these compounds act at early stages of virus replication, and compound 1b can also directly inactivate ZIKV particles. Molecular docking studies suggested that these compounds can bind to and block the activity of ZIKV NS5 methyltransferase. Finally, pharmacokinetic and toxicological predictions have reinforced the safety and drug-like profiles of these derivatives. In conclusion, the pyrazolone scaffold proved to be valuable for anti-ZIKV drug development, and the derivatives studied deserve further investigation.

关键词： Zika Pyrazolone NS5 Methyltransferase Antivirals

dehydrated Natural Feed for Cats: Influence on Apparent Digestibility Coefficient, Feces Scores, and Serum Immune, Antioxidant, and Metabolic Biomarkers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food and Nutrition Sciences 2024年第7期15卷 594-611页

作者： Bruno Giorgio de oliveira Cécere Guilherme Luiz deolindo Bianca F. Bissacotti Priscila Marquezin Copetti Maria rosa Chitolina Schetinger Bruna Klein Matheus delamea Baldissera Thiago Pereira Ribeiro Walter Hugo Cuelho Suarez Daniel Pigatto Monteiro Aleksandro Schafer Da Silva Graduate Multicenter Program in Biochemistry and Molecular Biology University of the State of Santa Catarina Lages Brazil department of Biochemistry and Molecular Biology Universidade Federal de Santa Maria (UFSM) Santa Maria Brazil department of Animal Science Universidade Federal de Santa Maria (UFSM) Chapec Brazil department of Health Science Universidade Franciscana (UFN) Santa Maria Brazil department of Animal Nutrition Tectron-Tecnologia e Inovao Toledo Brazil

The present study aimed to determine whether natural dehydrated feed (DNF) can replace dry extruded feed while preserving the required daily intake, nutrient digestibility and benefits for immunity and antioxidant response in cats. The animals were divided into two groups of seven animals each. One group received DNF, and the other consumed commercial extruded dry feed (DCF). The experiment lasted 45 days and we measured daily consumption and collected blood and feces samples. The animals in the DNF group showed greater digestibility of fiber and mineral matter than DCF. Cats in the DNF group had a higher volume of feces. DNF cats had lower leukocyte and granulocyte counts and cholesterol levels. Serum enzymatic antioxidant responses and non-enzymatic were higher in DNF cats. Cats in the DNF group showed lower serum acute phase proteins in addition to a tendency toward a higher concentration of transferrin than in the DCF group. Fecal Escherichia coli and total coliform counts of cats fed DNF were higher than DCF. We conclude that the daily consumption of cats is adequate. This feed had greater digestibility of fiber and mineral matter, in addition to an improvement in antioxidant and immunological responses.

关键词： Alternative Feed Antioxidant Companion Animals Health

Geographic information technology usage in developing countries – A case study in Mozambique

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geo-Spatial Information Science 2018年第4期21卷 331-345页

作者： Nelson Amade Marco Painho tiago oliveira Universidade Catolica de Mocambique BeiraMozambique Nova Information Management School Universidade Nova de LisboaLisboaPortugal

Geographic information technologies(GIT)have matured,have become pervasive throughout many types of organizations over recent decades and gained a wide range of attention in diverse sectors of *** goal of this paper is to identify the main drivers and uses of GIT in organizations and to give an overview of GIT uses in developing countries with a focus on a case study developed for Mozambique by analyzing the results of a survey of 123 Mozambican organizations that are current GIT *** results show that the main drivers behind are compatibility,complexity,competitive pressure,donor pressure,government policy,intention to adopt,innovation,relative advantage,security,and technology *** of the public and private sectors use GIT for customer/resource/risk management,decision support,education,research,monitoring,prediction,simulation,suitability analysis,sustainability,use and access.

关键词： Geographic information technologies organizations remote sensing GPS geographic information systems Mozambique

The interplay between leaf water potential and osmotic adjustment on photosynthetic and growth parameters of tropical dry forest trees

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 Forestry Research 2023年第1期34卷 177-186页

作者： tiago de Sousa Leite Romulo Magno oliveira de Freitas Nildo da Silva Dias Jeferson Luiz Dallabona Dombroski Narjara Walessa Nogueira Federal University of Mato Grosso CuiabáMTBrazil Federal Institute of Education Science and Technology of Rio Grande do NortePau dos FerrosRNBrazil Federal Rural University of the Semi-Arid Region MossoróRNBrazil

Mimosa tenuiflora and Piptadenia stipulacea are commonly accepted as drought-tolerant species but little is known about their response to drought followed by ***,the interplay between leaf water potential and osmotic adjustment on photo synthetic and growth parameters of these species was examined.A greenhouse study was conducted in a split-plot design with two water conditions in the main plots(control;drought followed by rehydration),and eight sampling times in the subplots(1,4and 7 days of drought,and 1,3,6,12,and 17 days of rehydration).Plant water status and biochemical changes were assessed as well as leaf gas exchange and subsequent *** drought stress,both species maintained a low leaf water potential throughout the day by accumulating compatible solutes,thus allowing a rapid and full recovery of water status when *** these plants minimized water loss by closing their stomata,neither showed stomatal limitations to *** inhibition of this process during drought was possibly related to mesophyll limitations as well as to a reversible downregulation of photo systems,along with adjustments of their *** deficits also triggered morphological adaptations at the whole plant level,leading to reduced growth,mainly of the shoots in *** and the roots in ***.

关键词： Drought stress Rehydration Gas exchange Plant biomass

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

国际护理知识网络建设的调查研究

International Journal of Nursing Sciences 2024年第3期11卷 374-380,I0004,I0005页

作者： Margareth Santos Zanchetta Suzanne Fredericks Kateryna Metersky Geraldine Martorella Pammla Petrucka Laurie Clune Kelly Graziani Giacchero Vedana Cristina rosa Soares Lavareda Baixinho Cristianne Maria Famer Rocha Sara Campagna Sally Zhang He Márcia Teles de oliveira Gouveia Marcelo Medeiros denize Bouttelet Munari Daniel Gonzalo Eslava Albarracin Carlos Aguilera-Serrano Walterlania Silva Santos Toronto Metropolitan University TorontoCanada Florida State University TallahasseeUSA University of Saskatchewan ReginaCanada University of Regina ReginaCanada State of Sao Paulo University Ribeirao PretoBrazil Lisbon Superior School of Nursing LisbonPortugal Federal University of Rio Grande do Sul Porto AlegreBrazil University of Turin TurinItaly Scarborough Health Network ScarboroughCanada Federal University of Piauí TeresinaBrazil Federal University of Goias GoianiaBrazil Fundacion Universitaria Cafam BogotaColombia University of Malaga MalagaSpain University of Brasília Ceil^andiaBrazil

本文报告了为创建护理知识网络(Nursing Knowledge Network,NKN)对不同国家护理院校进行环境扫描调查所收集到的信息。采用在线方式(2021年2-10月)进行环境扫描,探索研究领域的确定、现有资源、预期收益、教学研究创新、知识传播障碍及... 详细信息

本文报告了为创建护理知识网络(Nursing Knowledge Network,NKN)对不同国家护理院校进行环境扫描调查所收集到的信息。采用在线方式(2021年2-10月)进行环境扫描,探索研究领域的确定、现有资源、预期收益、教学研究创新、知识传播障碍及网络的预期贡献。目标信息提供者包括来自13个国家63所大学的200名护理教师。要求每所大学有1名参与者回答问卷。共有42所大学(约70%)回复,包括巴西21所,加拿大4所,葡萄牙和西班牙各3所,哥伦比亚、墨西哥、秘鲁和美国各2所,智利、意大利和巴拉圭各1所。其分享了相关信息和见解:通过护理高等教育机构之间的协作和交流,全球可以加强共同创新和研究合作能力;较少被研究的领域是知识网络生成证据、为当地科学实践提供信息的潜在重点。这些信息将为进一步了解护理发展,以及地方、区域和全球护理证据应用和传播相关的政府政策与计划制订提供参考。

关键词：信息网络创新扩散国际教育交流知识管理护理教育护理教师实践护理院校跨文化护理

Light intensity and hydrogel soil amendment differentially affect growth and photosynthesis of successional tree species

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2023年第1期34卷 257-268页

作者： Léo Vieira Leonel Fabrício de oliveira Reis Fábio Afonso Mazzei Moura de Assis Figueiredo tiago Massi Ferraz Sebastiao de oliveira Maia Júnior Patrick Costa Silva Jailma Ribeiro de Andrade Graduate Program in Agroecology State University of MaranhaoAv.Lourenco Vieira da Silva1000Jardim Sao CristovaoSao LuísMaranhao 65055-310Brazil State University of Maranhao Av.Lourenco Vieira da Silva1000Jardim Sao CristovaoSao LuísMaranhao 65055-310Brazil Graduate Program in Agriculture and Environment State University of MaranhaoPraca Goncalves Diass/nCentroBalsasMaranhao 65800-000Brazil

Global climate changes have increased temperatures,radiation indexes,and consequently,irregularities in rainfall in mainly tropical countries,considerably hindering plant establishment in recovering degraded *** objective of this study was to evaluate the growth and physiological characteristics of one species of each successional group:pioneer,secondary,and climax when subjected to different light intensities and hydrogel as a soil conditioner during rainy and dry *** experiment was conducted in the ecotone between Brazil’s two largest biomes,the Cerrado and the Amazon in the State of Maranh?*** parameters consisted of three species:Guazuma ulmifolia Lam.(pioneer),Astronium fraxinifolium Schott(secondary),and Cariniana rubra Gardner ex Miers(climax).There were two light intensities:70%and 100%,and two planting conditions:with and without soil conditioner(hydrogel).Gas exchanges were higher during the rainy season;the pioneer and secondary species had greater heights and photosynthetic rates in the dry period;the climax species had the lowest gas exchange and lowest recovery as rainfall *** pioneer and secondary species showed higher physiological plasticity,denoting better adaption to environments with high *** improved the photosynthetic performance of these species in the dry season and in areas with 100%sunlight.

关键词： Irradiance Hydrogel Photosynthetic efficiency Physiological plasticity

decontamination of mobile phones and electronic devices for health care professionals using a chlorhexidine/carbomer 940■gel

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2019年第1期13卷 192-198页

作者： Rafael Muniz de oliveira Nereida Mello da rosa Gioppo Jancineide oliveirade Carvalho Francilio Carvalho oliveira Thomas Jay Webster Fernanda Roberta Marciano Anderson oliveira Lobo University Hospital of the West of Parana State University of West of Parana Cascavel PR Brazil University Center for Health. Humanities and Technology of Piaui (UNINOVAFAPI). Piaui Brazil Science and Technology Institute Brasil University Itaquera SP Brazil Nanomedicine Laboratory Department of Chemical Engineering Northeastern University MA 02115 USA Materials Science and Engineering graduation program Technology Center Federal University of Piaui. PI Brazil

Though they reduce microorganism growth, current hospital disinfectants also damage many of today’s modern electronic devices such as tablets and smartphones. Herein, the efficacy of a new chlorhexidine digluconate gel (CDG) was tested as a disinfectant for mobile and electronic devices in a clinical environment. Specifically, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa and methicillin resistant Staphylococcus aureus were used to infect the screen of eight smartphones. The CDG was prepared at concentrations of 2%, 4% and 6%, and tested on paper disks infected with these bacteria before being tested on the smartphones. The devices were disinfected with the CDG gel (4%) at two times: immediately and after 5 min of the bacterial contamination. In all cases, the CDG gel eliminated 100% of gram-positive and gram-negative microorganisms compared to the control (without any agent). In addition, the gel did not damage the smartphones. Therefore, our study suggests that the CDG gel may be applied to disinfect a wide range of electronic devices for health care professionals in the hospital environment.

关键词： smartphones disinfection clinical environment chlorhexidine bacteria