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Efeito da sílica sol-gel na estrutura e resistência mecânica à compressão de pasta de cimento portland e de concreto de pós reativos
(Universidade Federal de Minas GeraisUFMG, 2016-11-21)
The pozzolanic effect of the sol-gel silica additive on the structure andcompressive strength of Portland cement paste of high initial resistance and reactive powder concrete, with low factor water/cement, was analyzed. ...
Kinematic and spermatic recovery after selection by centrifugation in colloid solutions of ovine cryopreserved semen
(2016-01-01)
Frozen and thawed ovine semen undergo morphological and functional changes that prevent or decrease the efficiency of fertilization. Sperm selection methods seek to improve the quality and viability of the fertilizing ...
Análise das condições de insalubridade por exposição a poeira sílica dos trabalhadores de uma empresa de fabricação de argamassa
(Universidade Tecnológica Federal do ParanáCuritibaBrasilCurso de Especialização em Engenharia do TrabalhoUTFPR, 2017-04-19)
Dust is a chemical agent that can be harmful to the health of the worker, especially when it contains crystalline silica. This type of dust is related to the appearance of several respiratory diseases of which we can mention ...
Carbonatação de pastas cimentícias petrolíferas modificadas com polímero estireno butadieno, sílica cristalina e sílica ativaCarbonation of oilwell cement slurries modified with styrene butadiene rubber, silica fume and crystalline silica
(Universidade Federal do Rio de JaneiroBrasilInstituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de EngenhariaPrograma de Pós-Graduação em Engenharia CivilUFRJ, 2021)
Effects of self-assembly process of latex spheres on the final topology of macroporous silica
(Elsevier B.V., 2005-11-15)
This paper surveys the topology of macroporous silica prepared using latex templates covering the submicrometric range (0.1-0.7 mu m). The behavior of latex spheres in aqueous dispersion has been analyzed by dynamic light ...
Effects of self-assembly process of latex spheres on the final topology of macroporous silica
(Elsevier B.V., 2005-11-15)
This paper surveys the topology of macroporous silica prepared using latex templates covering the submicrometric range (0.1-0.7 mu m). The behavior of latex spheres in aqueous dispersion has been analyzed by dynamic light ...
Influence of the use of rice husk as source of silica on the sol-gel synthesis of bioglass
(Associação Brasileira de Cerâmica, 2022)