Wall Blocks
Mostrando 13-24 de 76 artigos, teses e dissertações.
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13. Avaliação in vitro e in situ da eficácia de diferentes lasers no aumento da resistência ácida do esmalte em regiões de sulcos e fissuras / In vitro and in situ assessment of lasers to increase enamel acid resistance on the pits and fissures surface.
The aim of this study was to assess in vitro and in situ the lasers Er:YAG, Nd:YAG e CO2 in preventing enamel demineralization on the pits and fissures surface. For the in vitro study 45 occlusal enamel blocks were randomly divided into 3 groups in according with the treatment: G1 - Er:YAG; G2 - Nd:YAG; G3 - CO2. Treatments were made only on a half of the sp
Publicado em: 2009
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14. Estudo das alterações da membrana celular de microrganismos por compostos de inclusão de clorexidina: beta-ciclodextrina em diferentes proporções molares usando Microscopia de Força Atômica e Microscopia Eletrônica de Varredura
The formation of inclusion compounds of chlorhexidine for the controlled release of antimicrobials has shown decreasing in therapeutic concentrations effective. However, a lack of studies has been published about the mechanism which was inclusion compounds increase cellular permeability through the microorganisms membrane. Thus the objective of this work was
Publicado em: 2008
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15. Experimental small-scale analysis of the connections between structural clay block work masonry walls submitted to vertical loads / Análise experimental em escala reduzida de ligações entre paredes de alvenaria estrutural de blocos cerâmicos submetidas a ações verticais
This work presents a comparative analysis of three types of connections between structural masonry walls under vertical loads. The first type is a set of running bond interconnected masonry walls. The second connection is obtained by means of steel meshes and the third, also stack bond, is hardened by metallic staples anchored in grouted holes. The study is
Publicado em: 2007
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16. Avaliação da técnica de termografia infravermelha para identificação de estruturas ocultas e diagnóstico de anomalias em edificações: ênfase em edificações do patrimônio histórico
The main objective of this work is to research and evaluate the results of the application of heat transfer techniques: radiation (infrared thermograph) and conduction (thermopar sensors) as a tool of diagnosis of the presence of hidden structures and anomalies at edifications which belong to the Brazilian Historical Patrimony. The utilization of a non-destr
Publicado em: 2007
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17. O gesso na indÃstria da construÃÃo civil: consideraÃÃes econÃmicas sobre utilizaÃÃo de blocos de gesso / O gesso na indÃstria da construÃÃo civil: consideraÃÃes econÃmicas sobre utilizaÃÃo de blocos de gesso
O objetivo desse trabalho à um estudo dos benefÃcios e custos conseqÃentes da utilizaÃÃo do gesso e seus derivados, em substituiÃÃo aos materiais convencionais, na indÃstria da construÃÃo civil. Outro aspecto analisado à a incrementaÃÃo das informaÃÃes a respeito do gesso e o auxilio desse material no desenvolvimento de novos recursos e tecnol
Publicado em: 2007
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18. InfluÃncia da argamassa de revestimento na resistÃncia à compreensÃo axial em prismas de alvenaria resistente de blocos cerÃmicos
Since the 70s, buildings called âcaixÃesâ began to be built in a large scale, made of resistant masonry with up to four floors, in the Metropolitan Area of Recife. Itâs known that these constructions were built without technological basis and necessary technical rules, national and international ones. Itâs noticed that these constructions and the materi
Publicado em: 2006
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19. InfluÃncia da argamassa de revestimento na resistÃncia à compressÃo axial em prismas de alvenaria resistente de blocos cerÃmicos
Since the 70s, buildings called âcaixÃesâ began to be built in a large scale, made of resistant masonry with up to four floors, in the Metropolitan Area of Recife. Itâs known that these constructions were built without technological basis and necessary technical rules, national and international ones. Itâs noticed that these constructions and the materi
Publicado em: 2006
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20. CARACTERIZAÇÃO DO ISOLAMENTO ACÚSTICO DE UMA PAREDE DE ALVENARIA ESTRUTURAL DE BLOCOS CERÂMICOS / CHARACTERIZATION OF THE ACOUSTIC ISOLATION OF A CERAMIC BLOCKS MASONRY WALL
O trabalho buscou caracterizar a performance do isolamento sonoro de uma parede de alvenaria estrutural de blocos cerâmicos. Trabalhou-se com uma pesquisa experimental, através da determinação minuciosa dos constituintes e a posterior análise do Índice de Redução Sonora. Constatou-se a dificuldade de identificação de dados bibliográficos específi
Publicado em: 2006
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21. Analysis of reinforced concrete beams using strut and tie models / Análise de vigas de concreto armado utilizando modelos de bielas e tirantes
One of the main advantages presented by the strut-and-tie model is generality. This model is able to approximately represent, in a realistic and systematic way, the majority of todays reinforced concrete elements. Furthermore, it allows the physics-intuitive visualization of the behavior presented by structural concrete. On the other hand, its potentials a
Publicado em: 2006
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22. "Influência do volume de adesivo e das ciclagens térmica e mecânica na resistência de união resina-dentina" / Influence of the adhesive volume, thermal and mechanical load cycling on the resin-dentin bond strength
Dentin bonding interfaces with increased capacity of stress dissipation are able to prevent failures due to polymerization contraction, thermal and mechanical stresses. This would be obtained by increasing adhesive layer thickness. The purpose of this study was to compare the resin-dentin microtensile bond strengths (BS) of two adhesive systems (AS) applied
Publicado em: 2005
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23. The structure performance of walls of masonry by concrete blocks of recycled aggregates and building and demolition rejects / Desempenho estrutural de paredes de alvenaria de blocos de concreto de agregados reciclados de rejeitos de construção e demolição
Os rejeitos de construção e demolição representam, atualmente, grande volume de material desperdiçado no canteiro de obra e fábricas de pré-moldados de concreto. A necessidade da reciclagem para o desenvolvimento auto-sustentável, de materiais produzidos a partir dos rejeitos de construção, é de grande importância sob o impacto ambiental, além d
Publicado em: 2002
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24. Role of two Triatoma (Hemiptera: Reduviidae: Triatominae) species in the transmission of Trypanosoma cruzi (Kinetoplastida: Trypanosomatidae) to man in the West Coast of Mexico
From August 1997 to August 1998, 334 specimens of Triatoma longipennis and 62 of T. picturata were collected in four groups of localities placed in the zone from Guadalajara, Jalisco to Tepic, Nayarit, in the West Coast of Mexico. Most T. longipennis were collected outdoors (69.2%) while most T. picturata (58.1%) were collected indoors. All collected specime
Memórias do Instituto Oswaldo Cruz. Publicado em: 2001-02