Components of the acoustic swallowing signal: Preliminary study

Purpose: To analyze the components of the acoustic signal of swallowing using a specific software. Methods: Fourteen healthy subjects ranging in age from 20 to 50 years (mean age 31±10 years), were evaluated. Data collection consisted on the simultaneous capture of the swallowing audio with a microphone and of the swallowing videofluoroscopic image. The bursts of the swallowing acoustic signal were identified and their duration and the interval between them were later analyzed using a specific software, which allowed the simultaneous analyses between the acoustic wave and the videofluoroscopic image. Results: Three burst components were identified in most of the swallows evaluated. The first burst presented mean time of 87.3 milliseconds (ms) for water and 78.2 for the substance. The second burst presented mean time of 112.9 ms for water and 85.5 for the pasty substance. The mean interval between first and second burst was 82.1 ms for water and 95.3 ms for the pasty consistency, and between second and third burst was 339.8 ms for water and 322.0 ms for the pasty consistency. Conclusion: The software allowed the visualization of three bursts during the swallowing of healthy individuals, and showed that the swallowing signal in normal subjects is highly variable.

In vitro assessment of dentin erosion after immersion in acidic beverages: Surface profile analysis and energy-dispersive X-ray fluorescence spectrometry study

The aim of this study was to investigate the effects of some acidic drinks on dentin erosion, using methods of surface profile (SP) analysis and energy-dispersive X-ray fluorescence spectrometry (EDXRF). One hundred standardized dentin slabs obtained from bovine incisor roots were used. Dentin slabs measuring 5x5 mm were ground flat, polished and half of each specimen surface was protected with nail polish. For 60 min, the dentin surfaces were immersed in 50 mL of 5 different drinks (Gatorade®, Del Valle Mais orange juice®, Coca-Cola®, Red Bull® and white wine), 20 blocks in each drink. The pH of each beverage was measured. After the erosive challenge, the nail polish was removed and SP was analyzed. The mineral concentration of dentin surfaces was determined by means of EDXRF. Data were analyzed statistically by ANOVA and Tukey's test (α=0.05). SP analysis showed that Red-Bull had the highest erosive potential (p<0.05). EDXRF results exhibited a decrease in phosphate in the groups immersed in Red-Bull, orange juice and white wine (p<0.05), and no significant difference in calcium content between the reference surface and eroded surface. In conclusion, this study demonstrated that all studied beverages promoted erosion on root dentin and Red Bull had the highest erosive potential. There was no correlation between pH of beverages and their erosive potential and only the P content changed after erosive challenge.

Morphometric and bioacoustic data on three species of Pseudopaludicola Miranda-Ribeiro, 1926 (Anura: Leptodactylidae: Leiuperinae) described from chapada dos guimarães, mato Grosso, Brazil, with the revalidation of pseudopaludicola ameghini (Cope, 1887)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Mating preferences and consequences of choosing sibling or non-sibling mates by females of the predator Podisus nigrispinus (Heteroptera: Pentatomidae)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Supplementation of soft drinks with metallic ions reduces dissolution of bovine enamel

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Euselasia hygenius Occulta (Riodininae): First report of feeding on Psidium guajava (Myrtaceae) in Minas Gerais State, Brazil

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

O efeito do sabor azedo e da temperatura fria no tempo de trânsito faríngeo da deglutição em indivíduos após acidente vascular encefálico hemisférico isquêmico

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Diversidade de vespas sociais (Hymenoptera: Vespidae; Polistinae) em fragmentos de Floresta Estacional Semidecidual no noroeste paulista

Pós-graduação em Biologia Animal - IBILCE

A importância de fragmentos florestais na diversidade de anfíbios anuros em Icém, Região Noroeste do Estado de São Paulo

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Caracteres estruturais e dimensão fractal da folha de espécies de Arachis e sua relação com a cercosporiose

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

A crise econômica no Japão após os anos 90

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Superfluido de fermi aprisionado com Variação de Interação Atômica

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo in vitro das alterações na superfície do titânio comercialmente puro e da liga de titânio Ti -6Al-4V submetida a diferentes tratamentos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A produção independente de webséries pela perspectiva multiplataforma da televisão digital e internet

Pós-graduação em Televisão Digital: Informação e Conhecimento - FAAC

Influência do selante de superfície em propriedades físicas e mecânicas de resinas compostas submetidas a envelhecimentos artificiais

Pós-graduação em Odontologia - FOA