Results 41 to 50 of about 216,328 (198)

Bianchi Type‐I Dark Energy Cosmology with Power‐Law Relation in Brans‐Dicke Theory of Gravitation

Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018
We have studied the interacting and non‐interacting dark energy and dark matter in the spatially homogenous and anisotropic Bianchi type‐I model in the Brans‐Dicke theory of gravitation. The field equations have been solved (i) by using power‐law relation and (ii) by assuming scale factor in terms of redshift.
S. D. Katore, D. V. Kapse, Edward Sarkisyan-Grinbaum   +2 more
wiley   +1 more source

Strangelets at Chacaltaya [PDF]

, 2000
We discuss the possible imprints of strangelets (i.e., lumps of Strange Quark Matter) in Chacaltaya experimental data using model of propagation of such objects through the atmosphere developed by us recently.Comment: gz-compressed .tar file containing ...
Rybczynski, M., Wilk, G., Wlodarczyk, Z.
core   +1 more source

Influência de aditivos dispersantes e acelerador na hidratação de cimento e cimento-matriz [PDF]

Cerâmica, 2006
A aplicação de concretos refratários, principalmente na siderurgia, é um processo em constante evolução, que apresenta uma forte dependência dos avanços dos conhecimentos sobre os ligantes hidráulicos. Isso se deve a influência exercida por estes ligantes nas propriedades reológicas e desenvolvimento de resistência mecânica de concretos.
Oliveira, I. R., Garcia, J. R., Pandolfelli, V. C.   +2 more
openaire   +3 more sources

Incorporation of Coconut Fibers Into Clay‐Based Mortars: A Study on Mechanical and Microscopic Behavior

International Journal of Ceramic Engineering &Science, Volume 8, Issue 2, March 2026.
Clay‐based mortar reinforced with coconut fibers showed improved flexural strength and promising mechanical performance, despite shrinkage‐induced cracks. The study highlights the potential of using waste and natural fibers in eco‐efficient mortars, emphasizing the importance of curing and moisture control.
Gabriela Machado Guimarães Ferreira, Sebastião Ribeiro   +1 more
wiley   +1 more source

A Study on Occupancy and Compressive Strength of Concrete with Produced Injection Method

Advances in Materials Science and Engineering, Volume 2014, Issue 1, 2014., 2014
Concrete is a composite construction material made primarily of aggregate, cement, and water. Fresh concrete must have certain features. These are shown in durability, workability, compressive strength, flexural strength, shrinkage, impact resistance, wear, and so forth.
Cevdet Emin Ekinci, Omer Kelesoglu, Ying Li   +2 more
wiley   +1 more source

Comparative Biocompatibility of Portland‐Based Endodontic Cements Containing Niobium and/or Bismuth Oxides in Rat Subcutaneous Tissue

BioMed Research International, Volume 2026, Issue 1, 2026.
Objectives To evaluate the in vitro cytocompatibility and osteogenic potential and the in vivo biocompatibility of two experimental endodontic cements based on Portland cement combined with either Nb2O5 (F6) and/or bismuth oxide (F7) in a rat subcutaneous implantation model. Methods For the in vitro study, MC3T3‐E1 preosteoblastic cells were exposed to
Raphael Victor Silva Andrade, Rafaela Alcindo Silva de Souza Fé, Vladimir Galdino Sabino, Carlos Augusto Galvão Barboza, Maria Luiza Diniz de Sousa Lopes, Nizyara Costa da Silva, Valkleidson Santos de Araujo, Amanda Silveira da Silva, Raimundo Fernandes de Araujo Junior, Naianne Kelly Clebis, Isadora Luisa Gomes da Silva, Pedro Catalão Moura, Sofia Pessanha, Aurigena Antunes de Araújo, Baisakhi Banerjee   +14 more
wiley   +1 more source

Comparative Analysis of Selected Physicochemical Properties of Pozzolan Portland and MTA‐Based Cements

International Scholarly Research Notices, Volume 2014, Issue 1, 2014., 2014
Physicochemical properties of pozzolan Portland cement were compared to ProRoot MTA and MTA BIO. To test the pH, the samples were immersed in distilled water for different periods of time. After the pH analysis, the sample was retained in the plastic recipient, and the electrical conductivity of the solution was measured. The solubility and radiopacity
Maura Cristiane Gonçales Orçati Dorileo, Ricardo Dalla Villa, Orlando Aguirre Guedes, Andreza Maria Fábio Aranha, Alex Semenoff-Segundo, Matheus Coelho Bandeca, Alvaro Henrique Borges, Antonio Tilocca   +7 more
wiley   +1 more source

GRB970228 as a prototype for short GRBs with afterglow

, 2006
GRB970228 is analyzed as a prototype to understand the relative role of short GRBs and their associated afterglows, recently observed by Swift and HETE-II.
Bernardini, Maria Grazia, Bianco, Carlo Luciano, Caito, Letizia, Chardonnet, Pascal, Corsi, Alessandra, Dainotti, Maria Giovanna, Fraschetti, Federico, Guida, Roberto, Ruffini, Remo, Xue, She-Sheng   +9 more
core   +1 more source

CIMENTOS RESINOSOS

Revista Fluminense de Odontologia, 2019
Resumo Cimentos resinosos assemelham-se as resinas compostas e possuem fase inorgânica e orgânica. O componente orgânico é formado por matriz de resina, sendo constituído pelo bisfenol glicidil metacrilato (BIS-GMA) ou pelo uretano di-metacrilato (UDMA) ou pelo Trietileno Glicol Dimetacrilato (TEGDMA).
openaire   +2 more sources

Produção de mudas de espécies arbóreas nativas em viveiro via resgate de plantas jovens

Revista Árvore, 2011
A dificuldade na obtenção de mudas com alta diversidade nos viveiros florestais tem levado à perda de diversidades biológica e genética nos projetos de restauração de áreas degradadas.
Leandro Calegari, Sebastião Venâncio Martins, Luiz Carlos Busato, Elias Silva, Ricardo Coutinho Junior, José Marinaldo Gleriani   +5 more
doaj   +1 more source