Silvia Barcellos, Leandro Carvalho, Patrick Turley,
... of Southern California and an affiliate of NBER; *Leandro Carvalho is an Assistant Research Professor of Economics at ... in Los Angeles. (silvia.barcellos{at}usc.edu) (leandro.carvalho{at}usc.edu) (pturley{at}usc.edu)
Tópico(s): Health disparities and outcomes
2021 - University of Wisconsin Press | The Journal of Human Resources
Sivasubramanium V. Bhavani, Zanthia Wiley, Philip A. Verhoef, Craig M. Coopersmith, Ighovwerha Ofotokun,
... MSc; Xiaoli Liu, BS; Eduardo Mireles-Cabodevila, MD; Leandro Carvalho, MD; Rishikesan Kamaleswaran, PhD; R. W. M. A. ...
Tópico(s): Hematological disorders and diagnostics
2022 - American Medical Association | JAMA
Produção Nacional
Revisado por pares
Álisson Rocha Machado, Leonardo Rosa Ribeiro da Silva, Felipe Chagas Rodrigues de Souza, Rahul Davis, Leandro Carvalho Pereira, Wisley Falco Sales, Wagner de Rossi, E. O. Ezugwu,
In most of the machining processes, the application of surface texturing is one of the most remarkable and promising research fronts in relation to the use of tribological concepts for improving machinability. This paper aims to review the most recent articles on this theme (from 2016 to date) to assist the researchers in the state of the art of this technology, guide the forthcoming related investigations, and thus, fill the identified research gaps. The texture effect in machining was comprehensively ...
Tópico(s): Metal and Thin Film Mechanics
2021 - Elsevier BV | Journal of Materials Processing Technology
An-Kwok Ian Wong, Marie‐Laure Charpignon, Han Kim, Christopher S. Josef, Anne de Hond, Jhalique Jane R. Fojas, Azade Tabaie, Xiaoli Liu, Eduardo Mireles‐Cabodevila, Leandro Carvalho, Rishikesan Kamaleswaran, R. W. M. A. Madushani, Lasith Adhikari, Andre L. Holder, Ewout W. Steyerberg, Timothy G. Buchman, Mary E. Lough, Leo Anthony Celi,
Importance Discrepancies in oxygen saturation measured by pulse oximetry (Spo 2 ), when compared with arterial oxygen saturation (Sao 2 ) measured by arterial blood gas (ABG), may differentially affect patients according to race and ethnicity. However, the association of these disparities with health outcomes is unknown. Objective To examine racial and ethnic discrepancies between Sao 2 and Spo 2 measures and their associations with clinical outcomes. Design, Setting, and Participants This multicenter, retrospective, ...
Tópico(s): Sepsis Diagnosis and Treatment
2021 - American Medical Association | JAMA Network Open
Produção Nacional
Revisado por pares
Leandro Carvalho Dantas Breda, Cristiane Naffah de Souza Breda, José Roberto Fogaça de Almeida, Larissa Neves Monteiro Paulo, Grasielle Pereira Jannuzzi, Isabela de Godoy Menezes, Renata Chaves Albuquerque, Niels Olsen Saraiva Câmara, Karen Spadari Ferreira, Sandro Rogério de Almeida,
Chromoblastomycosis is a chronic and progressive subcutaneous mycosis caused mainly by the fungus Fonsecaea pedrosoi. The infection is characterized by erythaematous papules and the histological sections demonstrating an external layer of fibrous tissue and an internal layer of thick granulomatous inflammatory tissue containing mainly macrophages and neutrophils. Several groups have been studying the roles of the innate and adaptive immune systems in F. pedrosoi infection; however, few studies have ...
Tópico(s): Neutrophil, Myeloperoxidase and Oxidative Mechanisms
2020 - Frontiers Media | Frontiers in Immunology
Produção Nacional
Revisado por pares
Cristiane Naffah de Souza, Leandro Carvalho Dantas Breda, Meraj A. Khan, Sandro Rogério de Almeida, Niels Olsen Saraiva Câmara, Neil Sweezey, Nades Palaniyar,
pH is highly variable in different tissues and affects many enzymatic reactions in neutrophils. In response to calcium ionophores such as A23187 and ionomycin, neutrophils undergo nicotinamide adenine dinucleotide phosphate oxidase (NOX)-independent neutrophil extracellular trap (NET) formation (NETosis). However, how pH influences calcium-dependent Nox-independent NET formation is not well understood. We hypothesized that increasing pH promotes Nox-independent NET formation by promoting calcium influx, ...
Tópico(s): Medical and Biological Ozone Research
2018 - Frontiers Media | Frontiers in Immunology
James Banks, Leandro Carvalho, Francisco Pérez‐Arce,
This paper studies the causal effect of education on decision making. In 1972, England raised its minimum school-leaving age from 15 to 16 for students born after September 1, 1957. An online survey was conducted with 2,700 individuals born in a 36-month window on either side of this date. Participants made 25 incentivized risk choices that allow us to measure multiple dimensions of decision making. Despite the policy having effects on education, educational qualifications, and income, we find no ...
Tópico(s): Housing Market and Economics
2018 - The MIT Press | The Review of Economics and Statistics
Silvia Barcellos, Leandro Carvalho, Patrick Turley,
This work investigates whether genetic makeup moderates the effects of education on health. Low statistical power and endogenous measures of environment have been obstacles to the credible estimation of such gene-by-environment interactions. We overcome these obstacles by combining a natural experiment that generated variation in secondary education with polygenic scores for a quarter-million individuals. The additional schooling affected body size, lung function, and blood pressure in middle age. ...
Tópico(s): Cognitive Abilities and Testing
2018 - National Academy of Sciences | Proceedings of the National Academy of Sciences
Produção Nacional
Revisado por pares
José Roberto Fogaça de Almeida, Grasielle Pereira Jannuzzi, Gilberto Hideo Kaihami, Leandro Carvalho Dantas Breda, Karen Spadari Ferreira, Sandro Rogério de Almeida,
Abstract Sporothrix brasiliensis is the most virulent fungus of the Sporothrix complex and is the main species recovered in the sporotrichosis zoonotic hyperendemic area in Rio de Janeiro. A vaccine against S . brasiliensis could improve the current sporotrichosis situation. Here, we show 3 peptides from S . brasiliensis immunogenic proteins that have a higher likelihood for engaging MHC-class II molecules. We investigated the efficiency of the peptides as vaccines for preventing subcutaneous sporotrichosis. ...
Tópico(s): Plant-Microbe Interactions and Immunity
2018 - Nature Portfolio | Scientific Reports
Leandro Carvalho, Stephan Meier, Stephanie W. Wang,
We study the effect of financial resources on decision-making. Low-income U.S. households are randomly assigned to receive an online survey before or after payday. The survey collects measures of cognitive function and administers risk and intertemporal choice tasks. The study design generates variation in cash, checking and savings balances, and expenditures. Before-payday participants behave as if they are more present-biased when making intertemporal choices about monetary rewards but not when ...
Tópico(s): Housing Market and Economics
2016 - American Economic Association | American Economic Review
Produção Nacional
Revisado por pares
Mónica Marcela Castiblanco-Valencia, Tatiana R. Fraga, Leandro Carvalho Dantas Breda, Sílvio Arruda Vasconcellos, Cláudio Pereira Figueira, Mathieu Picardeau, Elsio A. Wunder, Albert I. Ko, Angela Silva Barbosa, Lourdes Isaac,
Leptospiral immunoglobulin-like (Lig) proteins are surface exposed molecules present in pathogenic but not in saprophytic Leptospira species. We have previously shown that Lig proteins interact with the soluble complement regulators Factor H (FH), FH like-1 (FHL-1), FH related-1 (FHR-1) and C4b Binding Protein (C4BP). In this study, we used the saprophyte L. biflexa serovar Patoc as a surrogate host to address the specific role of LigA and LigB proteins in leptospiral complement evasion. L. biflexa expressing ...
Tópico(s): Leptospirosis research and findings
2016 - Elsevier BV | Immunology Letters
Leandro Carvalho, Silvia Prina, Justin Sydnor,
We investigate whether access to savings accounts affects choices individuals make about financial risk and intertemporal tradeoffs. We exploit a field experiment that randomized access to savings accounts among a largely unbanked population of Nepalese villagers. One year after the accounts were introduced, we administered lottery-choice and intertemporal-choice tasks to the treatment and control groups. We find that the treatment is more willing to take risks in the lottery-choice task and is ...
Tópico(s): Decision-Making and Behavioral Economics
2016 - Elsevier BV | Journal of Development Economics
Silvia Barcellos, Leandro Carvalho, James P. Smith, Joanne Yoong,
We document that immigrants in the United States differ from natives in several aspects relevant for their financial decision making. Based on these differences, we designed novel financial education materials targeted at US immigrants and their children and evaluated their effectiveness using a randomized control trial. To the best of our knowledge, this is the first rigorous evaluation of financial education programs targeted at this population. Compared to a control group, the groups that received ...
Tópico(s): Microfinance and Financial Inclusion
2015 - Wiley | Journal of Consumer Affairs
Produção Nacional
Revisado por pares
Leandro Carvalho Dantas Breda, Ching‐Lin Hsieh, Mónica Marcela Castiblanco Valencia, Ludmila B. da Silva, Angela Silva Barbosa, Anna M. Blom, Chang Yung-Fu, Lourdes Isaac,
The complement system consists of more than 40 proteins that participate in the inflammatory response and in pathogen killing. Complement inhibitors are necessary to avoid the excessive consumption and activation of this system on host cells. Leptospirosis is a worldwide zoonosis caused by spirochetes from the genus Leptospira. Pathogenic leptospires are able to escape from complement activation by binding to host complement inhibitors Factor H [FH] and C4b-binding protein (C4BP) while non-pathogenic ...
Tópico(s): Viral Infections and Vectors
2015 - Public Library of Science | PLoS neglected tropical diseases
Leandro Carvalho, Rodrigo R. Soares,
We use data from a unique survey of members of drug-trafficking gangs in favelas (slums) of Rio de Janeiro, Brazil, to characterize drug-trafficking jobs and study the selection into gangs, analyzing what distinguishes gang-members from other youth living in favelas. We also estimate earnings regressions for gang-members and examine their career path: age at entry, progression within the gangs' hierarchy, and short- to medium-term outcomes. Individuals from lower socioeconomic background and with ...
Tópico(s): HIV, Drug Use, Sexual Risk
2015 - Elsevier BV | Journal of Economic Behavior & Organization
Produção Nacional
Revisado por pares
Leandro Carvalho Ribeiro, Eduardo R. M. Barbosa, Frank van Langevelde, Fabian Borghetti,
Abstract Questions Does seed mass influence the tolerance of seeds to the effects of heating in fires? Is the tolerance to heat shocks during fire events dependent mostly on seed mass itself or to other traits linked to the species ecological origin, e.g. non‐fire‐prone (forest) and fire‐prone (savanna) environments? Location Savanna and forest ecosystems of the Cerrado biome, Brazil. Methods Heat shocks were applied to seeds of 17 selected common tree species in savanna (ten species) or forest ecosystems ( ...
Tópico(s): Seed Germination and Physiology
2015 - Wiley | Journal of Vegetation Science
Yu Yang, Leandro Carvalho Xavier De Andrade, Liming Fang, Jun Ma, Wenjing Zhang, Youhong Tang,
Tópico(s): Dendrimers and Hyperbranched Polymers
2015 - Springer Science+Business Media | Journal of Materials Science
Produção Nacional
Revisado por pares
Alfredo Sahagún-Ruiz, Adriana Patricia Granados Martinez, Leandro Carvalho Dantas Breda, Tatiana R. Fraga, Mónica Marcela Castiblanco Valencia, Angela Silva Barbosa, Lourdes Isaac,
Pasteurella pneumotropica is an opportunist Gram negative bacterium responsible for rodent pasteurellosis that affects upper respiratory, reproductive and digestive tracts of mammals. In animal care facilities the presence of P. pneumotropica causes severe to lethal infection in immunodeficient mice, being also a potential source for human contamination. Indeed, occupational exposure is one of the main causes of human infection by P. pneumotropica. The clinical presentation of the disease includes ...
Tópico(s): Toxoplasma gondii Research Studies
2014 - Public Library of Science | PLoS ONE
Produção Nacional
Revisado por pares
H deP Lemes, Ivete Aparecida de Mattias Sartori, Leandro Carvalho Cardoso, Daniela Ponzoni,
The aim of this study was to measure changes in buccal alveolar crestal bone levels after immediate placement and loading of dental implants with Morse taper prosthetic abutments after tooth extraction. This study followed the STROBE guidelines regarding prospective cohort studies. The sample comprised 12 patients with a mean age of 45 years, in whom a central or upper lateral incisor was indicated for extraction. Prior to extraction, computed tomography (CT) analysis was carried out to assess the ...
Tópico(s): Periodontal Regeneration and Treatments
2014 - Elsevier BV | International Journal of Oral and Maxillofacial Surgery
Produção Nacional
Revisado por pares
Ludmila Bezerra da Silva, Lídia dos Santos Miragaia, Leandro Carvalho Dantas Breda, Cecília M. Abe, Mariana Costa Braga Schmidt, Ana Maria Moro, Denize Monaris, Jonas N. Conde, Mihály Józsi, Lourdes Isaac, Patrícia Antônia Estima Abreu, Angela Silva Barbosa,
ABSTRACT Upon infection, pathogenic Leptospira species bind several complement regulators in order to overcome host innate immunity. We previously characterized a 20-kDa leptospiral surface protein which interacts with C4b binding protein (C4BP): l eptospiral c omplement regulator-acquiring p rotein A (LcpA). Here we show that LcpA also interacts with human factor H (FH), which remains functionally active once bound to the protein. Antibodies directed against short consensus repeat 20 (SCR20) inhibited ...
Tópico(s): Leptospirosis research and findings
2014 - American Society for Microbiology | Infection and Immunity
Produção Nacional
Revisado por pares
Leandro Carvalho Ribeiro, Fabian Borghetti,
Although forest and savanna biomes predominate in tropics regions, the factors that control their distribution remain unclear. South American savannas occur in regions that are considered warm and humid enough to support forests, indicating that agents other than climate determine the occurrence of one or the other physiognomy. Herbivory, fire and water deficit have been considered environmental filters that limit the forest species encroachment in savanna physiognomies, but the effects of these ...
Tópico(s): Ecology and Vegetation Dynamics Studies
2013 - Wiley | Austral Ecology
Silvia Barcellos, Leandro Carvalho, Adriana Lleras‐Muney,
Previous research has not always found that boys and girls are treated differently in rural India. However estimates of the effect of gender on parental investments could be biased if girls end up in larger families due to son-biased stopping rules. Using a novel identification strategy that exploits that gender at conception is random, we document that boys receive more childcare time than girls, they are breastfed longer and they get more vitamin supplementation. Compared to other developing countries, ...
Tópico(s): Poverty, Education, and Child Welfare
2013 - American Economic Association | American Economic Journal Applied Economics
Produção Nacional
Revisado por pares
Leandro Carvalho Ribeiro, Maria Angélica F. Pedrosa, Fabian Borghetti,
Abstract Fire is considered an important factor in influencing the physiognomy, dynamics and composition of Neotropical savannas. Species of diverse physiognomies exhibit different responses to fire, such as population persistence and seed mortality, according to the fire frequency to which they are submitted. The aim of this study is to investigate the effects of heat shocks on seed germination of Anadenanthera macrocarpa (Benth.) Brenan, Dalbergia miscolobium Benth., Aristolochia galeata Mart. & ...
Tópico(s): Plant Parasitism and Resistance
2012 - Wiley | Plant Biology
Produção Nacional
Revisado por pares
Gabriele M. Baffone, Daniele Botticelli, Fabio Pantani, Leandro Carvalho Cardoso, Michael T. Schweikert, Niklaus P. Lang,
Aim: To evaluate the influence (i) of various implant platform configurations and (ii) of implant surface characteristics on peri-implant tissue dimensions in a dog model. Material and methods: Mandibular premolars and first molars were extracted bilaterally in six Labrador dogs. After 3 months of healing, two implants, one with a turned and a second with a moderately rough surface, were installed on each side of the mandible in the premolar region. On the right side of the mandible, implants with ...
Tópico(s): Cleft Lip and Palate Research
2011 - Wiley | Clinical Oral Implants Research
Produção Nacional
Revisado por pares
Marco Caneva, Daniele Botticelli, Fábio Rossi, Leandro Carvalho Cardoso, Fabio Pantani, Niklaus P. Lang,
Abstract Aim To study the influence on the healing of soft and hard peri‐implant tissues when implants of different sizes and configurations were installed into sockets immediately after tooth extraction. Material and methods Transmucosal cylindrical implants, 3.3 mm in diameter in the control sites, and conical 5 mm in diameter in the test sites, were installed into the distal socket of the fourth mandibular premolars in dogs immediately after tooth extraction. After 4 months, the hard and soft ...
Tópico(s): dental development and anomalies
2011 - Wiley | Clinical Oral Implants Research
Produção Nacional
Claudete Ferreira de Souza Monteiro, Leandro Carvalho Moura Fé, Maycon Alex Cavalcante Moreira, Isadora Elisa de Moura Albuquerque, Michelly Gomes da Silva, Mauro Cezar Passamani,
A pesquisa tem como objetivo levantar o perfil sociodemográfico e a adesão ao tratamento de dependentes do álcool no Centro de Atenção Psicossocial Álcool e Drogas. Trata-se de um estudo de natureza quantitativa, realizado no município de Teresina-PI. Os dados foram colhidos através do levantamento de informações presentes nos prontuários dos 227 sujeitos participantes desta pesquisa. Verificou-se que a maioria dos usuários era do sexo masculino (88,9%), com idade entre 19 e 59 anos (87,6%), solteiros ( ...
Tópico(s): Youth, Drugs, and Violence
2011 - UNIVERSIDADE FEDERAL DO RIO DE JANEIRO | Escola Anna Nery
Produção Nacional
Revisado por pares
Miguel Roismann, Rosyane Rena de Freitas, Leandro Carvalho Ribeiro, Marcos Flávio Montenegro, L. Biasi, Juliana Elizabeth Jung,
O carcinoma triquilemal é um tumor raro, que ocorre, geralmente, na pele exposta ao sol, principalmente face, couro cabeludo, pescoço e dorso das mãos, em indivíduos idosos, entre a 4ª e 9ª décadas de vida, sem predilação por sexo. O presente estudo mostra um caso de carcinoma triquilemal, recidivado, de difícil tratamento, em mesma topografia de um carcinoma basocelular tratado previamente com cirurgia e radioterapia.
Tópico(s): Nonmelanoma Skin Cancer Studies
2011 - Elsevier BV | Anais Brasileiros de Dermatologia
Produção Nacional
Revisado por pares
Marco Caneva, Daniele Botticelli, Luiz Antônio Salata, Sérgio Luı́s Scombatti de Souza, Leandro Carvalho Cardoso, Niklaus P. Lang,
To evaluate the influence of resorbable membranes on hard tissue alterations and osseointegration at implants placed into extraction sockets in a dog model.In the mandibular premolar region, implants were installed immediately into the extraction sockets of six Labrador dogs. Collagen-resorbable membranes were placed at the test sites, while the control sites were left uncovered. Implants were intended to heal in a submerged mode. After 4 months of healing, the animals were sacrificed, and ground ...
Tópico(s): dental development and anomalies
2010 - Wiley | Clinical Oral Implants Research
Produção Nacional
Revisado por pares
Murilo Luz, Daniel Cury Ogata, Marcos Flávio Montenegro, L. Biasi, Leandro Carvalho Ribeiro,
Eccrine porocarcinoma (EP), a particular malignant sweat gland tumor, represents only 0.005% of epithelial cutaneous neoplasms. The first reported case was attributed to Pinkus and Mehregan,1 and since then, only a few subsequent studies have been presented. Among these reported series, the majority describe aggressive tumor behavior.2–5 In this study, we present the features and outcomes of eight fully documented cases (one of the 10 largest single-center studies ever published). Although we have ...
Tópico(s): Cancer and Skin Lesions
2010 - Elsevier BV | Clinics
Produção Nacional
Revisado por pares
Jerri Édson Zilli, Leandro Carvalho Marson, Bruno Franco Marson, Norma Gouvêa Rumjanek, Gustavo Ribeiro Xavier,
O estudo objetivou avaliar a contribuição da fixação biológica de nitrogênio (FBN) promovida por estirpes de rizóbio para o desenvolvimento e rendimento de grãos do feijão-caupi em Roraima. Nos anos de 2005 e 2006 foram conduzidos experimentos em área de cerrado e mata alterada, onde foram testadas as estirpes INPA 03-11B, UFLA 3-84, BR3267 (recomendadas à cultura), a estirpe BR3299 e BR3262, duas doses de nitrogênio mineral (50 e 80 kg ha-1 de N) e um controle. As variáveis avaliadas foram: nodulação ...
Tópico(s): Cassava research and cyanide
2009 - INSTITUTO NACIONAL DE PESQUISAS DA AMAZÔNIA | Acta Amazonica