检索结果-南通市图书馆

An Overview of SWIPT Circuits and Systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ZTE Communications 2022年第2期20卷 13-18页

作者： Ricardo torres Diogo MATOS Felisberto PEREIRA Ricardo CORREIA Nuno Borges carvalho Department of Electronics telecommunications and informationUniversity of AveiroAveiro 3810Portugal Institute of Telecommunications Aveiro 3800Portugal CISeD-Research Center in Digital Services Polytechnic of ViseuViseu 3500Portugal Sinuta SA. Estarreja 3860Portugal AlmaScience Colab Madan ParqueCaparica 2829-516Portugal

From a circuit implementation perspective,this paper presents a brief overview of simultaneous wireless information and power transmission(SWIPT).By using zero-power batteryless wireless sensors,SWIPT mixes wireless power transmission with wireless communications to allow the truly practical implementation of the Internet of Things as well as many other *** this paper,technical backgrounds,problem formation,state-of-the-art solutions,circuit implementation examples,and system integrations of SWIPT are presented.

关键词： simultaneous wireless information and power transmission(SWIPT)systems backscatter communication low power commu⁃nication

Human CD4 ＋ effector T lymphocytes generated upon TCR engagement with self-peptides respond defectively to IL-7 in their transition to memory cells

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

Cellular & Molecular Immunology 2013年第3期10卷 261-274页

作者： Gabriela Gonzalez-Perez Norma C Segovia Amaranta Rivas-carvalho Diana P Reyes Honorio torres-Aguilar Sergio R Aguilar-Ruiz Claudine Irles Gloria Soldevila Carmen Sainchez-torres 1Department of Molecular Biomedicine Centre de Investigacion y de Estudios Avanzados del I.P.N. (CINVESTAV-IPN) Mexico City Mexico Department of Physiology Facultad de Medicina Mexico City Mexico Department of Immunology Institute de Investigaciones Biomedicas Universidad Nacional Autonoma de Mexico (UNAM) Mexico City Mexico

The peripheral repertoire of CD4＋ T lymphocytes contains autoreactive cells that remain tolerant through several mechanisms. However, nonspecific CD4＋ T cells can be activated in physiological conditions as in the course of an ongoing immune response, and their outcome is not yet fully understood. Here, we investigate the fate of human naive CD4＋ lymphocytes activated by dendritic cells （DCs） presenting endogenous self-peptides in comparison with lymphocytes involved in alloresponses. We generated memory cells （Tmem） from primary effectors activated with mature autologous DCs plus interleukin （IL）-2 （Tmauto）, simulating the circumstances of an active immune response, or allogeneic DCs （Tmallo）. Tmem were generated from effector cells that were rested in the absence of antigenic stimuli, with or without IL-7. Tmem were less activated than effectors （demonstrated by CD25 downregulation） particularly with IL-7, suggesting that this cytokine may favour the transition to quiescence. Tmauto and TmaHo showed an effector memory phenotype, and responded similarly to polyclonal and antigen-specific stimuli. Biochemically, IL-7-treated Tma^o were closely related to conventional memory lymphocytes based on Erk-l/2 activation, whereas Tmauto were more similar to effectors. Autologous effectors exhibited lower responses to IL-7 than allogeneic cells, which were reflected in their reduced proliferation and higher cell death. This was not related to IL-7 receptor expression but rather to signalling deficiencies, according to STAT5 activation These results suggest that ineffective responses to IL-7 could impair the transition to memory cells of naive CD4＋ T lymphocytes recognizing self-peptides in the setting of strong costimulation.

关键词： human CD4+ T cells IL-7 memory self-peptides

Metabolic and nutritional triggers associated with increased risk of liver complications in SARS-CoV-2

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 Hepatology 2022年第1期14卷 80-97页

作者： Rosangela Passos de Jesus Jozélio Freire de carvalho Lucivalda Pereira Magalhães de Oliveira carla de Magalhães Cunha Thaisy Cristina Honorato Santos Alves Sandra Tavares Brito Vieira Virginia Maria Figueiredo Allain Amador Bueno Postgraduate Program in Food Nutrition and Health at the School of Nutrition of the Federal University of BahiaSalvador 40.110-150BahiaBrazil Institute of Health Sciences Federal University of BahiaSalvador 40231-300BahiaBrazil Institute of Life Sciences State University of BahiaSalvador 41.150-000BahiaBrazil Department of Gastroenterology IPEMEDIpemed Faculty of Medical SciencesSalvador 40170-110BahiaBrazil College of Health Life and Environmental SciencesUniversity of WorcesterWorcester WR26AJUnited Kingdom

Obesity,diabetes,cardiovascular and respiratory diseases,cancer and smoking are risk factors for negative outcomes in severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),which can quickly induce severe respiratory failure in 5%of *** disease-associated liver injury may occur during progression of SARS-CoV-2 in patients with or without pre-existing liver disease,and damage to the liver parenchyma can be caused by infection of *** patients may be particularly vulnerable to SARS-CoV-2 if suffering with cirrhosis-associated immune ***,pharmacotherapies including macrolide or quinolone antibiotics and steroids can also induce liver *** this review we addressed nutritional status and nutritional interventions in severe SARS-CoV-2 liver *** guidelines for SARS-CoV-2 in intensive care(IC)specifically are not yet available,strategies for management of sepsis and SARS are suggested in *** enteral nutrition(EN)should be started soon after IC admission,preferably employing iso-osmolar polymeric formula with initial protein content at 0.8 g/kg per day progressively increasing up to 1.3 g/kg per day and enriched with fish oil at 0.1 g/kg per day to 0.2 g/kg per *** is necessary to identify signs of intolerance,hemodynamic instability and metabolic disorders,and transition to parenteral nutrition should not be delayed when energy and protein targets cannot be met via *** including vitamins A,C,D,E,B6,B12,folic acid,zinc,selenium andω-3 fatty acids have in isolation or in combination shown beneficial effects upon immune function and inflammation *** and monitored supplementation up to upper limits may be beneficial in management strategies for SARS-CoV-2 liver patients.

关键词： COVID-19 SARS-CoV-2 Enteral nutrition Parenteral nutrition Hepatic failure

Physical Activity Alters Superoxide Dismutase Activity and Intercellular Adhesion Molecule 1 Levels in Diabetes Mellitus Type 2 Patients

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 2023年第7期11卷 140-150页

作者： Anderson Martins Tavares Leonardo Matta Jaslana Hainfellner da Silva Christiane de Oliveira Bensusan carla do Nascimento Giselle Fernandes Taboada Rodrigo Soares Fortunato Luciene de carvalho Cardoso-Weide Postgraduate Program in Medical Sciences School of Medicine UFF-Universidade Federal Fluminense Rio de Janeiro Brazil Carlos Chagas Filho Institute of Biophysics UFRJ-Federal University of Rio de Janeiro Rio de Janeiro Brazil School of Biology University Salgado de Oliveira Rio de Janeiro Brazil Endocrinology Unit Department of Internal Medicine School of Medicine UFF-Universidade Federal Fluminense Rio de Janeiro Brazil Medical School Department of Pathology UFF-Universidade Federal Fluminense Rio de Janeiro Brazil Luciene de carvalho Cardoso Weide Medical School Department of Pathology UFF-Universidade Federal Fluminense Rio de Janeiro Brazil

Background: Oxidative stress and inflammation are related to the pathophysiology of diabetes mellitus (DM), being involved in the development of micro-and macrovascular complications. Physical activity is beneficial for DM patients, but little is known about the relationship between redox and inflammation biomarkers and the level of physical activity in these patients. Based on this, this research aims to evaluate the effects of physical activity level on redox stress parameters and inflammatory markers in T2DM patients. Methods: Eighty-four patients with T2DM were divided according to their physical activity level: group A (n = 48), sedentary;group B (n = 11) active (3 times a week, 150 min) and group C (n = 25), highly active (5 times a week, 150 - 300 mins, at least). Anthropometric and biochemical parameters, superoxide dismutase (SOD) and glutathione peroxidase (GPx) activities, as well as GSH, sRAGE and ICAM-1 levels were assessed. Results: Glycated haemoglobin, total cholesterol, and LDL-cholesterol levels were lower in the highly active group in comparison to other groups. Plasma SOD activity was higher in group C compared to Group A, while ICAM-1 levels were significantly higher in group B when compared to other groups. Conclusion: Our results suggest that the practice of physical activity is beneficial to T2DM patients, especially at high volume and frequency.

关键词： Cardiovascular Risk Exercise Health Inflammation Oxidative Stress

Effect of the Mineralogical Composition of Limestone on the Properties of Mortars

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 Materials Science and Chemical Engineering 2016年第5期4卷 16-24页

作者： carla Macie Arão Manhique Rodrigues Manjate carvalho Madivate Laboratório de Engenharia de Mo?ambique Maputo Mo?ambique Departamento de Química da Universidade Eduardo Mondlane Maputo Mozambique

Limestone has been used as a partial substitute for cement, due to its beneficial effect on mechanical properties of mortars and concretes. In the present research, we studied the effect of the mineralogical composition in mortars produced from limestone samples collected in different areas of Mozambique, using two cement types (Portland cement 32.5N and 42.5N). Additions of 10 to 25% limestone gave, in general and for the 32.5N cement, good results of the compressive strength for all limestone samples, while for the 42.5N only the Massinga samples performed well. Effect of the limestone additions on the flexural strength showed a beneficial effect for all samples and at all compositions studied, when using the 42.5N cement, while for the 32.5N cement only additions of 10% limestone gave values of the flexural strength higher than the reference material, with the exception of the Magude samples.

关键词： Mortars Concrete Limestone Filler

Application of the Distance to Natural (D2N) Index and Statistical Analysis of Different Anthropic Uses of the Río Grande De Comitán Watershed, Chiapas, México

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 Geoscience and Environment Protection 2022年第11期10卷 225-235页

作者： Flor Magali Aguilar López Dayana Almeida Yuri Tavares Rocha Eliziane carla Scariot Waldir José Gaspar Roberto Bonifaz Alfonzo Elisabete Maria Zanin Alberto carvalho Peret José Eduardo Dos Santos Universidade Federal de Sã o Carlos S&#227 o Carlos Brazil Universidade de Sã o Paulo S&#227 o Paulo Brazil InstitutoFederal de Sã o Paulo Mat&#227 o Brazil Universidade Federal do Mato Grosso Cuiabá Brazil Universidad Nacional Autónoma de México México City México Universidade Regional Integrada do Alto Uruguai e das Missõ es Erechim Brazil

The intensification of anthropic uses (i.e., increase of the hemerobic condition) threatens the remnants of native vegetation due to the reduction of its self-regulation capacity. In this research, the Distance to Nature (D2N) index for land use and land cover was applied in the Río Grande de Comitán watershed (Southern Mexico) to answer the following questions: 1) What were the land use dynamics observed in the Rio Grande de Comitán watershed in the trajectory through 1999, 2009 and 2019? 2) Does the subcategorization of the D2N allow one to identify which anthropic uses influence more the territorial expression of the watershed? To answer these questions, we performed a supervised classification of land use and land cover was performed in this watershed, and for the D2N index, the classification was simplified to three-category scale for the subcategorization of the anthropic component. Through Principal Component Analysis (PCA), we identified that agricultural anthropogenic use had the greatest influence on territorial expression. The reported scenario indicates a trend of gradual and continuous reduction of naturalness over the last 20 years. Additionally, the D2N index proved to be a useful tool to demonstrate both the anthropic impact, with the simplified scale, and the component that most influences the territory, by subcategorizing the anthropic scale.

关键词： Anthropic Land-Use Pressures Spatio-Temporal Principal Component Analysis (PCA) Environmental Planning Nature Conservation

The SNAKE System: CEMADEN’s Landslide Early Warning System (LEWS) Mechanism

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Geosciences 2023年第11期14卷 1146-1159页

作者： Marcio Roberto Magalhães de Andrade Cassiano Antonio Bortolozo Adenilson Roberto carvalho Harideva Marturano Egas Klaifer Garcia Daniel Metodiev Tulius Dias Nery carla Prieto Tristan Pryer Silvia Midori Saito Graziela Scofield CEMADEN—National Center for Monitoring and Early Warning of Natural Disasters General Coordination of Research and Development S&#227o José dos Campos Brazil Department of Mathematical Sciences University of Bath Bath UK

In Brazil, the prominent climate-induced disasters are floods and mass movements, with the latter being the most lethal. The spate of major landslide events, especially those in 2011, catalyzed the creation of CEMADEN (National Center for Monitoring and Early Warning of Natural Disasters). This article introduces one of CEMADEN’s pivotal systems for early landslide warnings and traces its developmental timeline. The highlighted SNAKE System epitomizes advancements in digital monitoring, forecasting, and alert mechanisms. By leveraging precipitation data from pluviometers in observed municipalities, the system bolsters early warnings related to potential mass movements, like planar slides and debris flows. Its deployment in CEMADEN’s Situation Room attests to its suitability for overseeing high-risk municipalities, attributed primarily to its robustness and precision.

关键词： Natural Disasters Landslide Early Warning System (LEWS) SNAKE System CEMADEN Brazil

Myostatin gene promoter:structure,conservation and importance as a target for muscle modulation

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 Animal Science and Biotechnology 2019年第2期10卷 255-273页

作者： carla Vermeulen carvalho Grade Carolina Stefano Mantovani Lúcia Elvira Alvares Universidade Federal da Integracao Latino-Americana UNILAInstituto Latino-Americano de Ciências da Vida e da NaturezaAvenida Tarquínio Joslin dos Santos1000Foz do IguacuPR CEP 85870-901Brazil Departamento de Bioquímica e Biologia Tecidual Universidade Estadual de Campinas-UNICAMPRua Monteiro Lobato255CampinasSP CEP 13083-862Brazil.

Myostatin(MSTN) is one of the key factors regulating myogenesis. Because of its role as a negative regulator of muscle mass deposition, much interest has been given to its protein and, in recent years, several studies have analysed MSTN gene regulation. This review discusses the MSTN gene promoter, focusing on its structure in several animal species, both vertebrate and invertebrate. We report the important binding sites considering their degree of phylogenetic conservation and roles they play in the promoter activity. Finally, we discuss recent studies focusing on MSTN gene regulation via promoter manipulation and the potential applications they have both in medicine and agriculture.

关键词： CAAT box E-box Gene promoter Myogenesis Myostatin SNP Transcription factors TATA box

Vulvar Rejuvenation Using High-Intensity Focused Ultrasound (HIFU): Fundamentals and Technique

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 Biosciences and Medicines 2022年第12期10卷 239-252页

作者： Fábio dos Santos Borges Mylana Almeida de carvalho carla Barreto Silva de Cerqueira Tais Andrade Cravo Monteiro Isabelle Maria Almeida e Benevides Adriele Machado Dantas Thiago Gusmão da Silva Carolina Barreto Ribeiro Martins dos Santos Estácio de Sá University Rio de Janeiro Brazil IDE Faculty—Institute for Educational Development Salvador Brazil Longevitat Clinic—Advanced Aesthetics Salvador Brazi FAINOR Independent College of the Northeast Vitória da Conquista Brazil UFBA Federal University of Bahia Salvador Brazil

Background: The unaesthetic appearance of the female intimate area (vulva, “mound of venus” and perianal region) is a triggering factor of negative psychological responses, embarrassment, anxiety and insecurity in many women. Using rejuvenating equipment for vaginal structure or for the intimate area as a whole is already widespread in the literature, and High-Intensity Focused Ultrasound (HIFU) has proven to be very effective in the clinical practice of many professionals. This study, therefore, aims to describe the fundamentals and applicability that guide the use of HIFU in vulvar rejuvenation. Materials and Methods: Exploratory research was carried out, presented in a narrative review, to highlight the action of HIFU in female intimate rejuvenation. The review explored scientific articles published and available in the following databases: MEDLINE (Medical Literature Analysis and Retrieval System Online), PubMed (National Library of Medicine), SCIELO (Scientific Electronic Library Online), and LILACS (Latin Literature American and the Caribbean in Health Sciences). In addition, some clinical findings obtained through a retrospective analysis of medical records were added to describe the authors’ clinical experience in the use of Focused Ultrasound (HIFU) for vulvar rejuvenation. Results: We verified that the tissues of female external genitalia respond very well to the stimuli of the focused sound waves of the HIFU, being able to produce immediate and lasting results through isolated applications or in association with intradermotherapy or other therapeutic resources. Conclusion: We conclude that using High Intensity Focused Ultrasound aimed at vulvar rejuvenation is safely indicated and assures excellent aesthetic results at the end of the treatment because similarly to other treatment techniques, the thermal stimuli of HIFU are also able to produce an excellent therapeutic response in the dermal tissue of the female intimate area, promoting intense neocollagen

关键词： Intimate Aesthetics Vulvar Rejuvenation Vaginal Rejuvenation HIFU Focused Ultrasound Micro Focused Ultrasound and Cosmetic Gynecology