Rio de Janeiro State University

About: Rio de Janeiro State University is a education organization based out in Rio de Janeiro, Brazil. It is known for research contribution in the topics: Population & Large Hadron Collider. The organization has 16631 authors who have published 30919 publications receiving 465753 citations. The organization is also known as: UERJ & Rio de Janeiro State University.

Secular Trends in Socio-economic Disparities in Edentulism: USA, 1972–2001

Abstract: For health care planning and policy, it is important to determine whether socio-economic disparities in edentulism, an ultimate marker of oral health, have improved over time. The aim of this study was to investigate the socio-economic disparities in edentulism between 1972 and 2001. Representative samples of the United States population, 25-74 years old, were obtained from NHANES I (1972), III (1991), and 1999-2002. Differences in the edentulism prevalence between high and low socio-economic positions (SEP) were compared. Differences in edentulism prevalence remained stable over approximately three decades (p = 0.480), being 10.6 percentage points in 1972, 12.1 percentage points in 1991, and 11.3 percentage points in 2001. Exploratory subgroup analyses suggested that disparities decreased for those individuals reporting a dental visit in the prior year and those reporting never having smoked. In conclusion, the absolute prevalence difference in edentulism between low and high socio-economic positions has remained unchanged over the last three decades.

Remoção de metais pesados de efluentes industriais por aluminossilicatos

Abstract: This review had as aim the bibliography research for the use of aluminosilicates to remove heavy metals from wastewaters. Advanced studies based on parameters that have influence for removal of heavy metals as pH, metal concentration, effect of ligants and removal capacity of zeolites and clays, were reported. These studies demonstrate that aluminosilicates can be successfully used for the removal of heavy metals under the optimized conditions.

Quantification and classification of marine litter on beaches along Armação dos Búzios, Rio de Janeiro, Brazil.

Abstract: Anthropogenic debris constitutes a significant threat to the marine environment, representing a hazard not only for marine and terrestrial animals but also for human activities, health, and tourism. This study provided the first assessment of the type and quantity of marine litter at Armacao dos Buzios, Brazil. Buzios is a popular tourist resort, which attracts visitors because of its proximity to Rio de Janeiro City. Sampling was conducted in belt transects of 4-m width, parallel to the coastline. To evaluate the composition and abundance of beach litter, all visible pieces of man-made debris (the number of items) found on each belt transect were identified in situ and recorded. Nearly 16,000 items of litter, belonging to seven categories were counted. An overall mean litter density of 13.76 items /100 m2 was quantified on the Armacao dos Buzios beaches. Paper was the most abundant litter item, in particular, represented by cigarette butts. Much of the litter items are discarded by visitors to t...

Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at √s =8TeV

Abstract: A search is performed for long-lived massive neutral particles decaying to quark-antiquark pairs. The experimental signature is a distinctive topology of a pair of jets, originating at a secondary vertex. Events were collected with the CMS detector at the CERN LHC in proton-proton collisions at a centre-of-mass energy of 8 TeV. The data analyzed correspond to an integrated luminosity of 18.5 inverse femtobarns. No significant excess is observed above standard model expectations. Upper limits at 95% confidence level are set on the production cross section of a heavy neutral scalar particle, H, in the mass range of 200 to 1000 GeV, decaying promptly into a pair of long-lived neutral X particles in the mass range of 50 to 350 GeV, each in turn decaying into a quark-antiquark pair. For X with mean proper decay lengths of 0.4 to 200 cm, the upper limits are typically 0.5-200 fb. The results are also interpreted in the context of an R-parity-violating supersymmetric model with long-lived neutralinos decaying into a quark-antiquark pair and a muon. For pair production of squarks that promptly decay to neutralinos with mean proper decay lengths of 2-40 cm, the upper limits on the cross section are typically 0.5-3 fb. The above limits are the most stringent on these channels to date.