Results 251 to 260 of about 22,855 (300)
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A protein diffusion model of the sealing effect
Chemical Engineering Science, 2009Water transport across the arterial endothelium is believed primarily to occur through breaks in the tight junction strands at the cell periphery between neighboring cells. Additional proteins arriving at the tight junction can close these breaks, thereby attenuating this water flux.
Stewart, Russell +3 more
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The effect of condensation pressure on the apical seal
Journal of Endodontics, 1988The effect of condensation force on the quality of the apical seal was examined. Extracted teeth were instrumented and laterally condensed using a predetermined condensation force. Ten teeth were obturated at 1.0, 1.5, 2.0, and 2.5 kg of force. The teeth were submerged in methylene blue dye for 2 wk at room temperature, sectioned, and the extent of the
J F, Hatton +3 more
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Effect of post preparation on the apical seal
The Journal of Prosthetic Dentistry, 1984Apical leakage was analyzed quantitatively in extracted teeth with varied levels of remaining gutta-percha. The effect of the method of gutta-percha removal on the apical seal was also evaluated. Ninety teeth were prepared so that 30 teeth had 3 mm of gutta-percha, 30 teeth had 5 mm, and 30 teeth had 7 mm. An additional 75 teeth were divided into three
G D, Mattison +3 more
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Sealing effects of cross-linked gelatin
Journal of Biomaterials Applications, 2012Surgical sealants form gel when applied to tissues. Currently, fibrin sealant has been successfully used in many surgical fields, but it has several disadvantages, including possible virus transmission, low adhesive strength, and high cost. In this study, gelatin and glutaraldehyde (GA) solutions were chosen to demonstrate the effectiveness of cross ...
S, Suzuki, Y, Ikada
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Effect of Shear Heat on Hydrodynamic Lift of Brush Seals in Oil Sealing
42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2006Due to their superior performance and stable leakage characteristics, brush seals are one of the dynamic seals used in oil and oil mist applications in aero-engines and turbines. The viscous medium between the high speed rotor surface and bearing surfaces formed by brush seal bristles generates a hydrodynamic lifting force that determines seal ...
Duran, E. Tolga +2 more
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The wettability of sealing materials and its effect on sealing performance: Part I
Sealing Technology, 2016Wetting influences the sealing mechanisms of rotary shaft lip seals and rod seals. This article, published in two parts, shows how to determine the surface free energy of sealing materials, especially elastomers. Wetting parameters and their influence on sealing operation are explained, and a hypothesis is proposed to connect wetting phenomena with ...
Peter Schuler, Werner Haas
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Effect of surface roughness of mechanical seals under blood sealing
Lubrication Science, 2010AbstractA miniature mechanical seal with cooling water circulating system has been developed as a shaft seal for rotary blood pumps. The present paper describes the establishment of the experimental methods under blood sealing and the estimation of the effect of the surface roughness on the shaft seal problems, especially in the increase of the ...
Jun Tomioka, Norifumi Miyanaga
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Effect of roughness on sealing performance of oil seals with surface texture
Industrial Lubrication and Tribology, 2019Purpose This paper aims to obtain the film thickness, friction torque and pumping rate and analyze the effects of roughness and surface micro-dimple texture (circular, square and equilateral triangle) on the performance of the oil seal. Design/methodology/approach On the basis of elastohydrodynamic lubrication and the pumping mechanism of rotating ...
Fuying Zhang +3 more
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1977
Information is presented on the effects of seals on exploited fish resources, and the fisheries on them in Scottish waters (with special reference to salmon) during the period 1959-1975.This note presents information on the damage to fisheries by seals following main headings:Direct damage to fishing gear and to fish in the catch.Predation by seals of ...
Parrish, B. B., Shearer, W. M.
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Information is presented on the effects of seals on exploited fish resources, and the fisheries on them in Scottish waters (with special reference to salmon) during the period 1959-1975.This note presents information on the damage to fisheries by seals following main headings:Direct damage to fishing gear and to fish in the catch.Predation by seals of ...
Parrish, B. B., Shearer, W. M.
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Effect of Quantity of Lubricating Oil on Sealing Characteristics of Oil Seals
SAE Technical Paper Series, 1978<div class="htmlview paragraph">For purpose of clarifying the effect of quantity of lubricating oil supplied to the seal lip portion on sealing characteristics of oil seals, relations between the typical constructional applications of the fitting portion for oil seals and the quantity of the lubricating oil supplied to the oil seals are discussed.
Hiroshi Hirabayashi +3 more
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