Consulta: subjectFacets:"Perlite"
Registros recuperados: 2
Data/hora: 06/06/2024 18:32:55

Effects of different levels of expanded perlite on the performance and egg quality traits of laying hens
Provedor de dados: 96
Autores: Oguz,Fatma Karakas; Gumus,Hidir; Oguz,Mustafa Numan; Bugdayci,Kadir Emre; Dagli,Hüseyin; Ozturk,Yasin.
ABSTRACT The influence of different levels of expanded perlite on the performance and egg quality traits was studied in laying hens. Forty Lohmann Brown females at 30 weeks of age were randomly assigned to four groups consisting of five replicates with two hens in each. Four diet groups were supplemented with 0% (control group), 1%, 2%, and 3% perlite, respectively. Feed and water were provided ad libitum. There were no significant differences in final body weight, feed intake, egg yield, and egg weight. Feed conversion ratio and egg weight decreased with addition of 2% perlite. Dietary perlite supplementation has no significant effects on shape, yolk, and albumen index. Haugh unit was affected significantly by addition of 2% perlite. Fecal pH, dry matter,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg; Performance; Perlite; Poultry.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000100020

Expanded perlite/cork fillers applied to aerospace insulation materials
Provedor de dados: 42
Autores: PINTO,JULIANO R.A.; SANCHES,NATALIA B.; DINIZ,MILTON F.; SANTOS,RÉGIS S.; OLIVEIRA,JOSÉ I.S. DE; DUTRA,RITA DE CÁSSIA L.
Abstract Insulations for rocket motors such as Flexible Thermal Protections (FTPs) and Rigid Thermal Protection (RTPs) act as thermal barriers against the hyperthermal environment from the solid propellant combustion. FTPs present dual function: to extend RTPs performance, and to attenuate the propellant contraction. FTPs used in the Brazilian Space Program have asbestos in their composition since the 70´s; however, they are hazardous for human health. In this context, a mixture of Expanded Perlite (PExp) and Cork Powder (CP) was investigated as a replacement for asbestos. Results showed reduction about 21 % in density and an increase of 13 % in the ablative properties. The low mechanical properties not interfere in this type of FTP due to your function of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Asbestos replacement; Cork; HTPB; Insulation; Perlite.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000603197