Read by QxMD icon Read


Leandro R F Lima, Alexis R Hernández, Felipe A Pinheiro, Caio Lewenkopf
Based on the investigation of the multi-terminal conductance of a system composed of two graphene nanoribbons, in which one is on top of the other and rotated by [Formula: see text], we propose a setup for a 50/50 electronic beam splitter that neither requires large magnetic fields nor ultra low temperatures. Our findings are based on an atomistic tight-binding description of the system and on the Green function method to compute the Landauer conductance. We demonstrate that this system acts as a perfect 50/50 electronic beam splitter, in which its operation can be switched on and off by varying the doping (Fermi energy)...
October 21, 2016: Journal of Physics. Condensed Matter: An Institute of Physics Journal
Gilvandro Lins de Oliveira, Fernando Cesar Serralheiro, Fernando Luiz Affonso Fonseca, Onésimo Duarte Ribeiro, Fernando Adami, Denise Maria Christofolini, Bianca Bianco, Caio Parente Barbosa
Objective: To compare the anesthetic techniques using propofol and fentanyl versus midazolam and remifentanil associated with a paracervical block with lidocaine in performing ultrasound-guided transvaginal oocyte aspiration. Methods: A randomized double-blind clinical trial (#RBR-8kqqxh) performed in 61 women submitted to assisted reproductive treatment. The patients were divided into two groups: anesthetic induction with 1mcg/kg of fentanyl associated with 1.5mg/kg of propofol (FP Group, n=32), in comparison with anesthetic induction using 0...
July 2016: Einstein
Ines Dourado, Luís Augusto V da Silva, Laio Magno, Maycon Lopes, Caio Cerqueira, Adriana Prates, Sandra Brignol, Sarah MacCarthy
Trans persons, including transvestites and transsexual women, show disproportionately high HIV/AIDS rates when compared to the rest of the population. However, few quantitative/qualitative studies have addressed trans persons in Brazil. Thus, a team of researchers from different fields is developing an interdisciplinary research project with the objective of shedding light on living conditions and ways of life among transvestites and transsexual women, while investigating determinant factors for HIV infection, syphilis, and hepatitis B and C...
October 10, 2016: Cadernos de Saúde Pública
Pablo Pena Gandara E Silva, Caio Rodrigues Nobre, Pryscila Resaffe, Camilo Dias Seabra Pereira, Felipe Gusmão
Microplastic debris is a pervasive type of contaminant in marine ecosystems, being considered a major threat to marine biota. One of the problems of microplastics is that they can adsorb contaminants in extremely high concentrations. When released from the particle, these contaminants have the potential to cause toxic effects in the biota. So far, reports of toxic effects are mostly linked with the direct exposure of organisms through ingestion of contaminated microplastics. There is little information on the toxicity of leachates from microplastics to marine organisms...
October 8, 2016: Water Research
Alberto Papi, Maria Sandra Magnoni, Carmelo Caio Muzzio, Gianmarco Benso, Andrea Rizzi
The Evaluation of COPD Longitudinally to Identify Predictive Surrogate End-points (ECLIPSE) study was a large 3-year observational multicentre international study aimed at defining COPD phenotypes and identifying biomarkers and/or genetic parameters that help to predict disease progression. The study has contributed to a better understanding of COPD heterogeneity, with the characterization of clinically important subtypes/phenotypes of patients, such as the frequent exacerbators or patient with persistent systemic inflammation, who may have different prognosis or treatment requirements...
October 14, 2016: Monaldi Archives for Chest Disease, Archivio Monaldi Per le Malattie del Torace
Mauro R Tucci, Eduardo L V Costa, Maria A M Nakamura, Caio C A Morais
Noninvasive ventilation (NIV) is commonly used to prevent endotracheal intubation in patients with acute respiratory distress syndrome (ARDS). Patients with hypoxemic acute respiratory failure who fail an NIV trial carry a worse prognosis as compared to those who succeed. Additional factors are also knowingly associated with worse outcomes: higher values of ICU severity score, presence of severe sepsis, and lower ratio of arterial oxygen tension to fraction of inspired oxygen. However, it is still unclear whether NIV failure is responsible for the worse prognosis or if it is merely a marker of the underlying disease severity...
September 2016: Journal of Thoracic Disease
Fabrício de Oliveira Ferreira, Caio Rodrigues-Silva, Susanne Rath
Avermectins and milbemycin are widely used as veterinary drugs and as agricultural pesticides, and their residues have been detected in soil. This study reports a simple and high-throughput method for determining ivermectin (IVER), abamectin (ABA), doramectin (DORA), eprinomectin (EPRI), and moxidectin (MOXI) residues in soils, employing an on-line solid-phase extraction technique coupled with ultra-high performance liquid chromatography and tandem mass spectrometry (SPE-UHPLC-MS/MS). The method was validated and applied for the determination of ABA in soils from an orange plantation treated with this pesticide...
October 11, 2016: Journal of Chromatography. A
Caio C Carvalho, Jose E Tanus-Santos, Gustavo H Oliveira-Paula
No abstract text is available yet for this article.
October 13, 2016: Hypertension Research: Official Journal of the Japanese Society of Hypertension
Eduardo Coriolano de Oliveira, Rodrigo Alves Soares Cruz, Nayanna de Mello Amorim, Marcelo Guerra Santos, Luiz Carlos Simas Pereira Junior, Eladio Oswaldo Flores Sanchez, Caio Pinho Fernandes, Rafael Garrett, Leandro Machado Rocha, André Lopes Fuly
Snake venoms are composed of a complex mixture of active proteins that induce toxic effects, such as edema, hemorrhage, and death. Lachesis muta has the highest lethality indices in Brazil. In most cases, antivenom fails to neutralize local effects, leading to disabilities in victims. Thus, alternative treatments are under investigation, and plant extracts are promising candidates. The objective of this work was to investigate the ability of crude extracts, fractions, or isolated products of Erythroxylum ovalifolium and Erythroxylum subsessile to neutralize some toxic effects of L...
October 11, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Vagne Melo Oliveira, Caio Rodrigo Dias Assis, Helane Maria Silva Costa, Raquel Pereira Freitas Silva, Juliana Ferreira Santos, Luiz Bezerra Carvalho, Ranilson Souza Bezerra
Aluminium is a major pollutant due to its constant disposal in aquatic environments through anthropogenic activities. The physiological effects of this metal in fish are still scarce in the literature. This study investigated the in vivo and in vitro effects of aluminium sulfate on the activity of enzymes from Nile tilapia (Oreochromis niloticus): brain acetylcholinesterase (AChE), muscle cholinesterases (AChE-like and BChE-like activities), pepsin, trypsin, chymotrypsin and amylase. Fish were in vivo exposed during 14days when the following experimental groups were assayed: control group (CG), exposure to Al2(SO4)3 at 1μg·mL(-1) (G1) and 3μg·mL(-1) (G3) (concentrations compatible with the use of aluminium sulfate as coagulant in water treatment)...
October 4, 2016: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
Caio V Z Cipro, Rosalinda C Montone, Paco Bustamante
Mercury (Hg) can reach the environment through natural and human-related sources, threatening ecosystems all over the planet due to its well known deleterious effects. Therefore, Antarctic trophic webs, despite being relatively isolated, are not exempt of its influence. To evaluate Hg concentrations in an Antarctic ecosystem, different tissues from 2 species of invertebrates, 2 of fish, 8 of birds, 4 of pinnipeds and at least 5 of vegetation were investigated (n=176). For animals, values ranged from 0.018 to 48...
October 4, 2016: Marine Pollution Bulletin
José Guilherme Prado Martin, Gabriela de Oliveira E Silva, Carolina Rodrigues da Fonseca, Caio Baptista Morales, Caroline Souza Pamplona Silva, Daniel Lima Miquelluti, Ernani Porto
Staphylococci are considered a major concern in dairy plants mainly due to the intensive production flow, automation of processing plants and increased demand in the microbiological quality of dairy products. This study aimed to identify S. aureus strains isolated from three Brazilian dairy plants, evaluate the influence of time, temperature and contact surface on the bacterial adhesion process, as well as the efficiency of simulated hygiene and sanitation protocol in removing adhered cells. For genotypic analyses, the presence of icaA and icaD in strains was evaluated...
December 5, 2016: International Journal of Food Microbiology
Caio Augusto Martins Aires, Cláudio M Rocha-de-Souza, Loeci Natalina Timm, Polyana Silva Pereira, Ana Paula D'Alincourt Carvalho-Assef, Marise Dutra Asensi
We aimed to describe an early detection of OXA-370-producing Klebsiella pneumoniae in Brazil. The isolate CCBH10079 belonged to ST17 and the blaOXA-370 was located in a plasmid of ≅57kb.
September 16, 2016: Diagnostic Microbiology and Infectious Disease
Caio Graco Zeppelini, Alzira Maria Paiva de Almeida, Pedro Cordeiro-Estrela
As a zoonosis, Plague is also an ecological entity, a complex system of ecological interactions between the pathogen, the hosts, and the spatiotemporal variations of its ecosystems. Five reservoir system models have been proposed: (i) assemblages of small mammals with different levels of susceptibility and roles in the maintenance and amplification of the cycle; (ii) species-specific chronic infection models; (ii) flea vectors as the true reservoirs; (iii) Telluric Plague, and (iv) a metapopulation arrangement for species with a discrete spatial organization, following a source-sink dynamic of extinction and recolonization with naïve potential hosts...
October 2016: PLoS Neglected Tropical Diseases
Fabiana K Ludka, Maurício P Cunha, Tharine Dal-Cim, Luisa Bandeira Binder, Leandra C Constantino, Caio M Massari, Wagner C Martins, Ana Lúcia S Rodrigues, Carla I Tasca
Intracerebroventricular (icv) amyloid-beta (Aβ)1-40 infusion to mice has been demonstrated to cause neurotoxicty and depressive-like behavior and it can be used to evaluate antidepressant and neuroprotective effect of drugs. Atorvastatin is a widely used statin that has demonstrated antidepressant-like effect in predictable animal behavioral models and neuroprotective effect against Aβ1-40 infusion. The purpose of this study was to determine the effect of in vivo atorvastatin treatment against Aβ1-40-induced changes in mood-related behaviors and biochemical parameters in ex vivo hippocampal slices from mice...
October 5, 2016: Molecular Neurobiology
Rafael José Marques Peixoto, Karla Rodrigues Miranda, Leandro Araujo Lobo, Alessandra Granato, Pedro de Carvalho Maalouf, Hugo Emiliano de Jesus, Caio T C C Rachid, Saulo Roni Moraes, Henrique Fragoso Dos Santos, Raquel Silva Peixoto, Alexandre Soares Rosado, Regina Maria Cavalcanti Pilotto Domingues
The Antarctic soil microbial community has a crucial role in the growth and stabilization of higher organisms, such as vascular plants. Analysis of the soil microbiota composition in that extreme environmental condition is crucial to understand the ecological importance and biotechnological potential. We evaluated the efficiency of isolation and abundance of strict anaerobes in the vascular plant Deschampsia antarctica rhizosphere collected in the Antarctic's Admiralty Bay and associated biodiversity to metabolic perspective and enzymatic activity...
October 5, 2016: Extremophiles: Life Under Extreme Conditions
Paula Barroso Cruz, Alan Franco Barbosa, Viviane Zeringóta, Diego Melo, Tatiane Novato, Queli Cristina Fidelis, Rodrigo Luiz Fabri, Mário Geraldo de Carvalho, Armando Ubirajara Oliveira Sabaa-Srur, Erik Daemon, Caio Márcio Oliveira Monteiro
We evaluated the acaricidal activity of Acmella oleracea methanol extract and spilanthol on Rhipicephalus microplus and Dermacentor nitens. The extract was made through maceration with methanol. From this extract, a dichloromethane fraction with 99% spilanthol was obtained and tested on R. microplus larvae and engorged females and D. nitens larvae. For evaluation against larvae, the modified larval packet test was used, and both the methanol extract and dichloromethane fraction were tested at concentrations of 0...
September 15, 2016: Veterinary Parasitology
José F Siqueira, Henrique S Antunes, Isabela N Rôças, Caio T C C Rachid, Flávio R F Alves
INTRODUCTION: Bacteria present in the apical root canal system are directly involved with the pathogenesis of post-treatment apical periodontitis. This study used a next-generation sequencing approach to identify the bacterial taxa occurring in cryopulverized apical root samples from root canal-treated teeth with post-treatment disease. METHODS: Apical root specimens obtained during periradicular surgery of ten adequately treated teeth with persistent apical periodontitis were cryogenically ground...
2016: PloS One
Rosiane Maciel Scandiuzzi, Caio Antonio de Campos Prado, Edward Araujo Júnior, Geraldo Duarte, Silvana Maria Quintana, Fabrício da Silva Costa, Gabriele Tonni, Ricardo de Carvalho Cavalli, Alessandra Cristina Marcolin
OBJECTIVE: To assess the maternal demographic characteristics and uterine artery (UA) Doppler parameters at first and second trimesters of pregnancy as predictors for hypertensive disorders (HDs) and adverse perinatal outcomes. METHODS: This prospective cohort study comprised 162 singleton low-risk women undergoing routine antenatal care. The left and right UA were assessed by color and pulsed Doppler and the mean pulsatility and resistance indices as well as the presence of a bilateral protodiastolic notch were recorded at 11 to 14 and 20 to 24 weeks' gestation...
September 2016: Obstetrics & Gynecology Science
Caio César Inaco Cirino, André Peluso Nogueira, André Amate Neto, Patricia Cristina Urbano, Tales Rubens de Nadai
BACKGROUND: We herein present a case in which a Toxoplasma cyst was found in a transbronchial biopsy specimen from an immunocompetent patient with negative serology for the parasite. CASE PRESENTATION: An 18-year-old Brazilian man presented with a 1-week history of dyspnea and fever and was diagnosed with right lower lobe pneumonia. He began inpatient treatment with intravenous antibiotics. During treatment, a bronchoscopy with bronchoalveolar lavage and transbronchial biopsy was performed...
2016: Journal of Medical Case Reports
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"