Produção Nacional
Revisado por pares
Isis Andréa Venturini Pola Poiate, Adalberto Bastos de Vasconcellos, Ronaldo B. Santana, Edgard Poiate,
The presence of the periodontal ligament (PDL) makes it possible to absorb and distribute loads produced during masticatory function and other tooth contacts into the alveolar process via the alveolar bone proper. However, several factors affect the integrity of periodontal structures causing the destruction of the connective matrix and cells, the loss of fibrous attachment, and the resorption of alveolar bone.The purpose of this study was to evaluate the stress distribution by finite element analysis ...
Tópico(s): dental development and anomalies
2009 - Wiley | Journal of Periodontology
Produção Nacional
Revisado por pares
Francisco Claudio F. Barros, Francisco W. Sousa, Rivelino Martins Cavalcante, Técia Vieira Carvalho, Francisco Santos Dias, Danilo C. Queiroz, Luiz C.G. Vasconcellos, Ronaldo Ferreira do Nascimento,
Abstract In this work, 8‐hydroxyquinoline is used as the active sites in cross‐linked chitosan beads with epichlorohydrin (CT‐8HQ). The CT‐8HQ material was shaped in bead form and used for heavy metal removal from aqueous solution. The study was carried out at pH 5.0 with both batch and column methods and the maximum adsorption capacity of metal ions by the CT‐8HQ was attained in 4 h in the batch experiment. The adsorption capacity order was: Cu 2+ > Ni 2+ > Zn 2+ for both mono‐ and multi‐component systems ...
Tópico(s): Extraction and Separation Processes
2008 - Wiley | CLEAN - Soil Air Water
Produção Nacional
Revisado por pares
Andy Petroianu, Leonardo de Souza Vasconcellos, Luiz Ronaldo Alberti, Lúcia Porto Fonseca de Castro, Juliana Moysés Leite,
To date, most studies on the preservation of ovarian tissue have been limited to experiments with autografts (1Corleta H.E. Corleta O. Capp E. Edelweiss M.I. Subcutaneous autologous ovarian transplantation in Wistar rats maintains hormone secretion.Fertil Steril. 1998; 70: 16-19Abstract Full Text PDF PubMed Scopus (37) Google Scholar, 2Theobald P. Roffé J.L. Berrocal J. Porrier M. Lévy G. Muller G. Autotransplantation ovarienne hétérotopique chez la femme.Presse Med. 1987; 26: 1239-1241Google Scholar, ...
Tópico(s): Renal and related cancers
2002 - Elsevier BV | Fertility and Sterility
Produção Nacional
Revisado por pares
Andy Petroianu, Leonardo de Souza Vasconcellos, Luiz Ronaldo Alberti, Maurício Buzelin Nunes,
BackgroundDespite many investigations of ovarian transplantation, it is still difficult to define the best site for ovarian implantation, considering its endocrine function. We sought to evaluate the influence of venous drainage on ovarian physiomorphological aspects and to assess ovary transplantation by intact and sliced techniques.Materials and methodsOne hundred and eight cycling female Wistar rats were randomly divided into six groups (n = 18): G1 (control, sham operation), G2 (bilateral oophorectomy), ...
Tópico(s): Reproductive System and Pregnancy
2004 - Elsevier BV | Journal of Surgical Research
Produção Nacional
Revisado por pares
Jorge Pablo Castello, Luís Poersch, Marcelo Vasconcellos, Ronaldo Olivera Cavalli, Wilson Wasielesky,
Tópico(s): Water Quality and Pollution Assessment
2007 - Springer Science+Business Media | Estuaries and Coasts
Produção Nacional
Revisado por pares
Sílvio Luís de Vasconcellos, Ivan Lapuente Garrido, Ronaldo Parente,
We aim to elucidate the roles that organizational creativity plays in the development of firms' international business competence (IBC). We conducted an investigation grounded in the resource-based view of how this intangible resource supports the development of capabilities and competences. We surveyed 77 Brazilian audiovisual SMEs and analyzed our data using OLS regression analysis. The results partially support the hypothesis that organizational creativity is a building block for IBC but show ...
Tópico(s): Business Strategy and Innovation
2018 - Elsevier BV | International Business Review
Produção Nacional
Revisado por pares
Cícero Pessoa de Moura, Carla Bastos Vidal, Allen Lopes de Barros, Luelc Souza da Costa, Luiz C.G. Vasconcellos, Francisco Santos Dias, Ronaldo Ferreira do Nascimento,
The capacity of a periodic mesoporous organosilica (PMO) to adsorb the aromatic compounds benzene, toluene, o-, and p-xylenes (BTX), which are usually present in produced waters, was investigated under both column and batch processes. The PMO was synthesized by condensation of 1,4 bis(triethoxisilyl)benzene (BTEB) under acidic conditions by using structure-directing agent (SDA) Pluronic P123 in the presence of KCl. Thermogravimetric analysis showed that the presence of the surfactant decreases the thermal ...
Tópico(s): Adsorption and biosorption for pollutant removal
2011 - Elsevier BV | Journal of Colloid and Interface Science
Produção Nacional
Revisado por pares
Nelson Dur�n, Regina Vasconcellos António, Marcela Haun, Ronaldo A. Pilli,
Tópico(s): Microbial Metabolism and Applications
1994 - Springer Science+Business Media | World Journal of Microbiology and Biotechnology
Produção Nacional
Revisado por pares
Ana Beatriz Lesqueves Barra, Ana Paula Roque-da-Silva, Marcos Sandro Vasconcellos, Jocemir Ronaldo Lugon, Jorge Paulo Strogoff de Matos,
Abstract Background Fluid overload (FO) assessed by bioimpedance spectroscopy (BIS) is associated with higher mortality risk in maintenance haemodialysis (HD). The aim was to assess if a better management of FO through short daily haemodialysis (SDHD) could improve survival. Methods Retrospective analysis of patients who were on HD 3 sessions/week for at least 3 months and shifted to in-centre SDHD (5 or 6 sessions/week, 2 to 3 h/session) between July 2012 and June 2016 at 23 dialysis units in Brazil. ...
Tópico(s): Hemodynamic Monitoring and Therapy
2020 - BioMed Central | BMC Nephrology
Produção Nacional
Revisado por pares
Shirlei Oliveira das Mercês, Felicson Leonardo Oliveira Lima, João Ronaldo Tavares de Vasconcellos Neto,
Introdução: O novo coronavírus é chamado de SARS-CoV-2, contudo causa a Síndrome Respiratória Aguda Grave (SRAG). Este vírus é transmitido facilmente de pessoa para pessoa por meio de contato com superfícies contaminadas, como também por meio de aerossóis, isso de acordo com a Organização Mundial da Saúde (OMS), mas são evidências não definitivas, e que provavelmente sejam mais propícias em locais com pouca ventilação e aglomeração. Decorre de sintomas como: febre, tosse, fadiga, dispneia, perda de ...
Tópico(s): Healthcare during COVID-19 Pandemic
2020 - Grupo de Pesquisa Metodologias em Ensino e Aprendizagem em Ciências | Research Society and Development
Produção Nacional
Marília Lordêlo Cardoso Silva, Volnei Brito de Souza, Verônica da Silva Santos, Hélio Mitoshi Kamida, João Ronaldo Tavares de Vasconcellos Neto, Aristóteles Goés‐Neto, María Gabriela Bello Koblitz,
Manganese peroxidase (MnP) is a ligninolytic enzyme that is involved in the removal of lignin from the cell wall of plants. This removal facilitates the access of hydrolytic enzymes to the carbohydrate polymers that are hydrolyzed to simple sugars, which allows the subsequent fermentation to obtain bioproducts, such as ethanol. In this work, response surface methodology (RSM) was employed to optimize the culture conditions on unexpensive substrate for MnP secretion by Trametes villosa. Three independent ...
Tópico(s): Nanoparticles: synthesis and applications
2014 - Scientific Research Publishing | Advances in Bioscience and Biotechnology
Produção Nacional
Revisado por pares
Carla Bastos Vidal, Allen Lopes de Barros, Cícero Pessoa de Moura, Ari Clecius Alves de Lima, Francisco Santos Dias, Luiz C.G. Vasconcellos, Pierre Basílio Almeida Fechine, Ronaldo Ferreira do Nascimento,
A novel procedure was developed for the synthesis of a periodic mesoporous organosilica (PMO), which was used to remove polycyclic aromatic hydrocarbons (PAHs) from aqueous solutions. Adsorption equilibrium isotherms and adsorption kinetics experiments were carried out in solutions of PAHs (2-60 mg L(-1)), using the PMO as adsorbent. Adsorption models were used to predict the mechanisms involved. The adsorption kinetics data best fitted the pseudo-first-order kinetic model for naphthalene, and to the ...
Tópico(s): Membrane Separation and Gas Transport
2011 - Elsevier BV | Journal of Colloid and Interface Science
Produção Nacional
Revisado por pares
Thiago S. Torres, Paula M. Luz, Raquel B. De Boni, Maurício Teixeira Leite de Vasconcellos, Brenda Hoagland, Alex Garner, Ronaldo I. Moreira, Valdiléa G. Veloso, Beatriz Grinsztejn,
Brazil has the largest population of individuals living with HIV/AIDS in Latin America with a disproportional prevalence of infection among men who have sex with men (MSM). This study evaluated PrEP awareness by age (18-24, 25-35, ≥36 years), its associated factors and the willingness to use HIV prevention technologies among MSM using a GSN app in Brazil. Inclusion criteria were ≥18 years-old, cisgender men and HIV-negative serostatus. Of 7242 individuals, 4136 (57%) completed the questionnaire. PrEP ...
Tópico(s): Sex work and related issues
2019 - Taylor & Francis | AIDS Care
Produção Nacional
Revisado por pares
Raquel de Oliveira Meira, Daniel Nogueira Mendes Braga, Leni Safira Gonçalves Pinheiro, Izabela Ferreira Gontijo de Amorim, Leonardo de Souza Vasconcellos, Luiz Ronaldo Alberti,
Purpose: To evaluate and compare the effects of homologous and heterologous PRP (Platelet-Rich Plasma) on the quality and speed of skin wound healing, compared to Poor Platelet Plasma (PPP). Methods: Twenty-one male adult rabbits were used; two for preparing homologous PRP, with the rest of them separated randomly in three groups, according to the treatment received: PPP - control (n=5), homologous PRP (n=7), heterologous (n=7). Excisional skin wounds were made on the back of the animals, for the application ...
Tópico(s): Wound Healing and Treatments
2020 - Sociedade Brasileira Para o Desenvolvimento da Pesquisa em Cirurgia | Acta Cirúrgica Brasileira
Produção Nacional
Revisado por pares
Thiago S. Torres, Raquel B. De Boni, Maurício Teixeira Leite de Vasconcellos, Paula M. Luz, Brenda Hoagland, Ronaldo I. Moreira, Valdiléa G. Veloso, Beatriz Grinsztejn,
Geosocial networking (GSN) smartphone apps are becoming the main venue for sexual encounters among Brazilian men who have sex with men (MSM). To address the increased HIV incidence in this population, preexposure prophylaxis (PrEP) was recently implemented in the Brazilian public health system in the context of combined HIV prevention.This study aimed to describe the characteristics of MSM using GSN apps for sexual encounters, their awareness of prevention strategies, and willingness to use PrEP.This ...
Tópico(s): HIV, Drug Use, Sexual Risk
2018 - JMIR Publications | JMIR Public Health and Surveillance
Produção Nacional
Revisado por pares
Leonardo de Souza Vasconcellos, Luiz Ronaldo Alberti, Cristiana Buzelin Nunes, Andy Petroianu,
OBJETIVO: O efeito da corticoterapia sobre a cicatrização de feridas cirúrgicas vem apresentando resultados conflitantes na literatura, principalmente quando usada por tempo prolongado. O objetivo do presente trabalho foi comparar a resistência cicatricial da pele de camundongos submetidos à administração de hidrocortisona, em distintos períodos pós-operatórios. MÉTODO: Foram estudados 150 camundongos machos submetidos à incisão e sutura da pele dorsal, divididos em cinco grupos. No Grupo 1 (n=6) ...
Tópico(s): Body Contouring and Surgery
2001 - Brazilian College of Surgeons | Revista do Colégio Brasileiro de Cirurgiões
Produção Nacional
Revisado por pares
Jessica Valéria Bastos Cruz, Érica Pereira dos Santos, Natália de Jesus Silva, Felicson Leonardo Oliveira Lima, Priscila Pimentel Martinelli, João Ronaldo Tavares de Vasconcellos Neto,
Objetivo: Relatar a influência dos metais pesados no acometimento do câncer, descrevendo assim, os principais metais detentores dessa possibilidade, citando ainda, os tipos de cânceres comumente ocasionados pela exposição a esses metais. Metodologia: Trata-se de uma revisão da literatura de natureza descritiva e qualitativa acerca da influência dos metais pesados no acometimento do câncer. O estudo foi realizado no período de dezembro de 2020 a fevereiro de 2021, mediante análise nas bases de dados: ...
Tópico(s): Palliative and Oncologic Care
2021 - Grupo de Pesquisa Metodologias em Ensino e Aprendizagem em Ciências | Research Society and Development
Produção Nacional
Revisado por pares
Diego Paim Carvalho Garcia, Cyntia Ferreira dos Reis, Luiza Ohasi de Figueiredo, Guilherme Vaz de Melo Mota, Leonardo Quinete Guimarães, Fernando Augusto de Vasconcellos Santos, Luiz Ronaldo Alberti, Thiago de Almeida Furtado,
Among the many techniques available for bariatric surgery, the Mini Gastric Bypass is a safe, technically simple and effective option. However, it may present with postoperative complications, being the perforated gastric ulcer one of the most relevant ones.A female patient of 41 years of age, with past medical history of a laparoscopic MGB performed 2 year before, presented with 12 hours of sharp and abruptly initiated abdominal pain, with diffuse presentation with suspected perforated acute abdomen ...
Tópico(s): Esophageal and GI Pathology
2019 - Wolters Kluwer | Annals of Medicine and Surgery
Produção Nacional
Revisado por pares
Luiz Ronaldo Alberti, Leonardo de Souza Vasconcellos, Andy Petroianu,
PURPOSE: To compare the resistance of skin wound healing of mice submitted to local or systemic hydrocortisone administration, in different postoperative periods. METHODS: An incision and suture was performed on the thoracic skin of 130 male mice: Group 1 (n = 10) resistance of the integer skin; Group 2 (n = 30) submitted only to skin incision and suture; Group 3 (n = 30) skin incision and suture followed by administration of saline fluid; Group 4 (n = 30) skin incision and suture followed by administration ...
Tópico(s): Dermatologic Treatments and Research
2012 - Sociedade Brasileira Para o Desenvolvimento da Pesquisa em Cirurgia | Acta Cirúrgica Brasileira
Produção Nacional
Revisado por pares
Andy Petroianu, Denny FM Veloso, Luiz Ronaldo Alberti, Leonardo de Souza Vasconcellos,
Abstract Background and Aim: The relation between the spleen and lipid metabolism has not been properly studied. In order to contribute to the filling of this gap, in the present investigation we experimentally assessed the lipidogram of rats in the presence of the spleen, in asplenia, and after conservative spleen surgeries. Methods: Fifty female Wistar rats of similar weight and age were divided into five groups submitted to the following procedures: group 1: control, with an intact spleen; group ...
Tópico(s): Liver Disease Diagnosis and Treatment
2008 - Wiley | Journal of Gastroenterology and Hepatology
Produção Nacional
Revisado por pares
Mariana Campos Souza Menezes, Leonardo de Souza Vasconcellos, Cristiana Buzelin Nunes, Luiz Ronaldo Alberti,
BACKGROUND: Tacrolimus, for its activity on modulation of collagen production and fibroblast activity, may have a role in the prevention of hypertrophic scars. OBJECTIVES: Evaluate macroscopic, microscopic, metabolic, laboratory effects and side effects of the use of topical tacrolimus ointment, in different concentrations, in the prevention of hypertrophic scars. METHODS: Twenty-two rabbits were submitted to the excision of 2 fragments of 1 cm of each ear, 4 cm apart, down to cartilage. The left ...
Tópico(s): Hemostasis and retained surgical items
2019 - Elsevier BV | Anais Brasileiros de Dermatologia
Produção Nacional
Revisado por pares
Renata Attademo Raso, Rebecca Rodrigues Bergamaschini Paim, Sérgio Veloso Brant Pinheiro, Wilson Campos Tavares, Leonardo de Souza Vasconcellos, Luiz Ronaldo Alberti,
Purpose: To evaluate the effects of chronic consumption of green tea on body weight and distribution of visceral fat by Computed tomography in female Wistar rats. Methods: Wistar rats were divided into control group (n = 5), which received water and feed ad libitum, and green tea group (n = 8), in which water has been replaced by green tea. The animals were weighed weekly and Computed Tomography was used at the beginning (1st week) and end (18th week) of the experiment for evaluating the distribution of ...
Tópico(s): Phytochemicals and Antioxidant Activities
2017 - Sociedade Brasileira Para o Desenvolvimento da Pesquisa em Cirurgia | Acta Cirúrgica Brasileira
Produção Nacional
Revisado por pares
Cícero P. de Moura, Marina Viana Fernandes, L. R. D. da Silva, Luiz C.G. Vasconcellos, Ronaldo Ferreira do Nascimento, Antoninho Valentini,
Abstract Nontronite samples pillared with aluminium (Pt/Al-PilM) and aluminium-lanthanum (Pt/AlLa-PilM) were prepared from natural nontronite, characterized and tested as catalyst in n-octane hydroisomerization reaction. The results were compared with those obtained from the same reaction using commercial Y-zeolite impregnated with platinum (Pt-Y). Experiments with commercial zeolite show that platinum is essential to maintain the reactional selectivity of the products. The conversion capacities of ( ...
Tópico(s): Zeolite Catalysis and Synthesis
2015 - Associação Brasileira de Cerâmica | Cerâmica
Leonardo de Souza Vasconcellos, Luiz Ronaldo Alberti, Juliana Ribeiro Romeiro, Andy Petroianu,
OBJETIVO: Avaliar a influência da icterícia colestática na variação ponderal. MÉTODOS: Foram utilizados 64 ratos adultos, distribuídos em seis grupos: F1 (n=6) - fêmeas normais, F2 (n=6) - fêmeas laparotomizadas, F3 (n=20) - fêmeas ictéricas, M1 (n=6) - machos normais, M2 (n=6) - machos laparotomizados, M3 (n=20) - machos ictéricos. A icterícia foi obtida com ligadura e secção do ducto biliopancreático. Os pesos dos animais foram registrados semanalmente, durante sete semanas. No 14º dia de experimento, dosaram-se ...
Tópico(s): Liver Disease and Transplantation
2012 - Brazilian College of Surgeons | Revista do Colégio Brasileiro de Cirurgiões
Produção Nacional
Revisado por pares
Francisco J. S. Vasconcellos, Geraldo Landre, José Adson Oliveira Guedes da Cunha, Juliano Oliveira, Ronaldo A. Ferreira, Auri Marcelo Rizzo Vincenzi,
Context: Software process improvement (SPI) aims to increase the effectiveness of a software organization. Many studies indicate that the strategic alignment is a critical factor for the SPI success. However, little is known about practical approaches to achieving and maintaining such alignment. Objective: The goal of this study is to evaluate the validation evidence of the existing approaches to the strategic alignment of SPI. Method: We develop a search protocol that combines database search and ...
Tópico(s): Software System Performance and Reliability
2016 - Elsevier BV | Journal of Systems and Software
Produção Nacional
Revisado por pares
Jorge Paulo Strogoff de Matos, Jorge Reis Almeida, Adrián Guinsburg, Cristina Marelli, Ana Beatriz Lesqueves Barra, Marcos Sandro Vasconcellos, Eufrônio José D Almeida Filho, Marcos Hoette, Frederico Ruzany, Jocemir Ronaldo Lugon,
Brazil has the third largest contingent of patients on maintenance hemodialysis (HD) worldwide. However, little is known regarding survival rate and predictors of mortality risk in that population, which are the purposes of this study. A total of 3,082 patients incident on HD, from 2000 to 2004, at 25 dialysis facilities distributed among 7 out of 26 states of Brazil were followed-up until 2009. Patients were 52 ± 16 years-old, 57.8% men, and 20.4%, diabetics. The primary outcome was all causes of ...
Tópico(s): Chronic Kidney Disease and Diabetes
2011 - Sociedade Brasileira de Nefrologia | Brazilian Journal of Nephrology
Produção Nacional
Revisado por pares
Luiz Ronaldo Alberti, Leonardo de Souza Vasconcellos, Juliano Ferreira Barbosa, Andy Petroianu,
Objetivos: avaliar os aspectos morfofuncionais de ovários implantados no omento maior, bem como a melhor técnica para implantação do ovário: se íntegro ou fatiado. Métodos: foram divididas aleatoriamente 40 ratas Wistar com ciclos estrais normais em quatro grupos: Grupo I (n = 5), controle - laparotomia; Grupo II (n = 5), ooforectomia total bilateral; Grupo III (n = 15), implante autólogo íntegro no omento maior e Grupo IV (n = 15), implante autólogo fatiado no omento maior. Realizaram-se esfregaços vaginais ...
Tópico(s): Assisted Reproductive Technology and Twin Pregnancy
2002 - Thieme Medical Publishers (Germany) | Revista Brasileira Ginecologia e Obstetrícia
Pedro Ivo Guimarães de Vasconcellos, Ruben Rosenthal, Ronaldo Pinheiro da Rocha Paranhos,
Os aços inoxidáveis duplex e superduplex possuem uma microestrutura austeno-ferrítica com fração média de cada fase de cerca 50%. A microestrutura duplex é responsável pelas excelentes propriedades mecânicas, especialmente o limite de escoamento e a tenacidade, e pela elevada resistência a corrosão por pites e sob tensão em meios contendo cloretos. A soldagem destes aços é frequentemente uma operação crítica. Neste trabalho, um tubo de superduplex SAF 2207 foi soldado pelo processo TIG (GTAW) no ...
Tópico(s): Welding Techniques and Residual Stresses
2010 - Associação Brasileira de Soldagem | Soldagem & Inspeção
Produção Nacional
Revisado por pares
Raquel B. De Boni, Iona K. Machado, Maurício Teixeira Leite de Vasconcellos, Brenda Hoagland, Esper G. Kallás, José Valdez Madruga, Nilo Martinez Fernandes, Natália B. Cerqueira, Ronaldo I. Moreira, Silvia Pereira Goulart, Valdiléa G. Veloso, Beatriz Grinsztejn, Paula M. Luz,
Concurrent psychosocial problems may synergistically increase the risk of HIV infection (syndemics), representing a challenge for prevention. We aimed to evaluate the prevalence and associated factors of syndemics among men who have sex with men (MSM) and transgender women (TGW) enrolled in the Brazilian pre-exposure prophylaxis demonstration study (PrEP Brasil Study). Secondary cross-sectional analysis of the PrEP Brasil Study was performed. Of 450 HIV-seronegative MSM/TGW enrolled in the PrEP Brasil ...
Tópico(s): HIV, Drug Use, Sexual Risk
2018 - Elsevier BV | Drug and Alcohol Dependence
Produção Nacional
Revisado por pares
Luiz Ronaldo Alberti, Denny Fabrício Magalhães Veloso, Leonardo de Souza Vasconcellos, Andy Petroianu,
To assess the influence of spleen surgeries (splenectomy, presence of spleen and after conservative surgeries) on lipids metabolism.Fifty female Wistar rats of similar weight and age were divided into five groups submitted to the following procedures: Group 1 - control, with an intact spleen; Group 2 - sham operation, Group 3 - total splenectomy; Group 4 - subtotal splenectomy, and Group 5 - total splenectomy complemented with autogenous spleen tissue implants. Four months after the interventions, serum triglycerides, ...
Tópico(s): Cancer, Lipids, and Metabolism
2012 - Sociedade Brasileira Para o Desenvolvimento da Pesquisa em Cirurgia | Acta Cirúrgica Brasileira