Pvc Tubes
Mostrando 13-24 de 24 artigos, teses e dissertações.
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13. Comparação da Avaliação Mecânica de Compressão Axial em Seis Modelos de Fixadores Esqueléticos Externos Confeccionados com Barras Estabilizadoras de polimetacrilato de metila ou de Madeira e Parafusos de Aço Inoxidável 304. / Comparison of the Mechanical Evaluation of Axial Compression in Six Models of External Skeleton Fixators Manufactured with Stabilized Bars of Methyl Methacrylate or of Wood and Stainless Steel Screws 304.
With the objective of testing the resistance and the biomechanical behavior of external fixators of low cost used in veterinary medicine, were created 6 prototypes la type manufactured from alternative materials, using as orthopedic implants, stainless steel screws 304 porous, and as stabilized bar the methacrylate resin or wood poles (Pinnus ellioti). The m
Publicado em: 2008
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14. Corretivos da acidez e gesso na mitigaÃÃo dos efeitos da compactaÃÃo do solo na nutriÃÃo e produÃÃo do braquiarÃo e da soja cultivada em sucessÃo. / Acidity amendments and gypsum on the effects of soil compaction on the growth and production of braquiarÃo and soybean grown in succession.
Compaction process, in addition to causing losses of soil physical features, interferes in a direct manner in the availability of nutrients and plantsâ growth. Few are the works which report alternatives to promoting the amelioration of that stress, mainly as the application of amendments, gypsum and crop succession are concerned. In this way, the present w
Publicado em: 2008
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15. Shear bond strength of metallic brackets photo-activated with light-emitting diode (LED) at different exposure times
The purpose of this study was to compare the shear bond strength of orthodontic metallic brackets photo-activated with two different light-curing sources at different exposure times: halogen light (XL 1500, 3M ESPE) and LED light (Ortholux, 3M Unitek). Sixty bovine permanent lower incisors were inserted into PVC tubes containing plaster. The buccal surfaces
Journal of Applied Oral Science. Publicado em: 2007-10
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16. Viabilidades térmica, econômica e de materiais de um sistema solar de aquecimento de água a baixo custo para fins residenciais
Apresenta-se um sistema de aquecimento solar de água, trabalhando em regime de termossifão, constituído por um, coletor solar alternativo e um reservatório armazenador de água também alternativo. O coletor foi construído com um material compósito a base de gesso e isopor e o reservatório térmico a partir de um tambor de polietileno de 200 litros ut
Publicado em: 2007
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17. Effect of calcium on enzymes of antioxidant system in maize (Zea mays L.) âSaracuraâ â BRS-4154 plantlets submitted to how oxygen availability / Efeito do cÃlcio em enzimas do sistema antioxidante em plÃntulas do milho (Zea Mays L.) âSaracuraâ â BRS-4154 submetidas à baixa disponibilidade de oxigÃnio
The present work aimed to verify the influence of calcium in the ADH and antioxidant system enzymes, like SOD, CAT, APX and GR, in maize seedlings "Saracura" during the period of low availability of oxygen and the onset of pos-stress recovery. In this research there were used maize plantlets, âSaracuraâ (BRS-4154), cycle 17. The germination was made in ger
Publicado em: 2006
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18. Study of testing types used on the evaluation of dentin-composite bond / Estudo de metodologias utilizadas na avaliação da resistencia mecanica da união composito-dentina
The aim of this study was to evaluate the dentin-restorative composite strength of 2 adhesive systems Clearfil SE Bond (CSEB) and Single Bond (SB) using 4 different tests: Shear , Tensile, Micro-shear and Micro-tensile tests. 52 bovine incisors were used in this study which were cut and embedded in PVC tubes (20mm internal diameter, 40mm height) with polyest
Publicado em: 2005
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19. Avaliação in vitro da resistencia ao cisalhamento de braquetes metalicos com e sem composito incorporado a base e cimentos de ionomero de vidro com variação da superficie de esmalte
The aim of this study was to evaluate the shear bond strength from orthodontic brackets (Victory Series) bonded with composites (APC II and APC Plus) and resin-modified glass ionomer cements (Fuji Ortho LC and Fuji Ortho Band) applied on bovine enamel surface under different enamel conditions (either dry or moisten with distilled water). The adhesive remnant
Publicado em: 2005
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20. Viability of use of PVC tubes in solar collectors: an analysis of materials
This paper presents a study of the inherent degradations of PVC tubes due to the thermal effect and ultraviolet solar radiation. The approach relates its causes and its effect of use of the PVC tubes as elements to absorption, forming a coil, in solar collectors for water heating. It is demonstrated that such degradations can be burst through the use of an o
Materials Research. Publicado em: 2003-06
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21. Tecnologia solar de interesse social e baixo custo para aquecimento de agua na moradia
Low cost technological solutions are defined here as practices that ally thermal efficiency and low investments for the economical and social context of low income populations. These solutions imply in the use of low cost recyde materials and row materials. The present work analyses solar heat water technologies for Brazilian poor people, faced their energet
Publicado em: 2002
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22. Resistencia de união de resinas compostas de dupla ativação ao titanio c.p
The aim of this study was to evaluate the tensile bond strength of commercially pure Titanium bonded to the luting composite resins Panavia Fluoro Cement and Re1y X ARC. One hundred twenty Titanium discs were casted and embedded in PVC tubes with cold-cured acrylic resin. The edges of the Titanium discs containing tubes were cut and the Titanium discs were g
Publicado em: 2001
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23. Utilização de dioxido de carbono (CO2) com gas fosfina (PH3) no controle de pragas de grãos armazenados
The present work utilized gaseous mixtures of carbon dioxide and phosphine aiming to eliminate all stages of Sitophilus zeamais Motschulsk:y, Sitophilus oryzae Linneus and Rhyzopertha dominica Fabricius. The concentrations of carbon dioxide utilized were 10%, 20%, 30% and 40%, in combination with 100ppm, 200ppm, 400ppm and 600ppm of phosphine. The grains uti
Publicado em: 2000
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24. Resistencia a tração de coroas metalicas fundidas
In the course of this investigation a procedure has been envolved to verify the influence of conditianing surface of dentin with a sodium fluoride solution, 2% rate, anda calcium hydroxide solution, 10% rate, over a traction resistance of metalic crowns, fixed with zinc phosphate and zinc polycarboxylate cement. Human being teeth, just removed, were used in
Publicado em: 1987