Results 221 to 230 of about 186,637 (248)
Some of the next articles are maybe not open access.
Nature, 2008
Postdocs are attempting to organize and improve their lot worldwide — but results have been mixed. Paul Smaglik reports.
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Postdocs are attempting to organize and improve their lot worldwide — but results have been mixed. Paul Smaglik reports.
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Bond Strength in Cold Roll Bonding
CIRP Annals, 1985Summary The mechanisms producing metallic bonds in cold welding are fracture of the contaminant surface film, extrusion of base material through the cracks and builoup of real contact and coalescing with base material of the opposite surface. Bay has earlier proposed a general model for the bond strength in cold welding based upon a continuum ...
Tarras Wanheim +3 more
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A critique of bond strength measurements
Journal of Dentistry, 1989The lack of consistent values for dentine bond strengths in shear or in tension from what are superficially identical experimental procedures has led to ambiguities in the interpretation of the data. These variations in bond strength are usually considered to be related to different adhesive procedures.
I.C. Howard +3 more
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Acta Odontologica Scandinavica, 1996
No currently available bond test for dental metal ceramic systems has yet gained general acceptance. Such a bond test cannot be established without careful analysis of the stress distribution within the adherence region. The objective of the present study was to establish a mechanical shear stress test and combine the results with a finite element ...
Magnus Persson, Maud Bergman
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No currently available bond test for dental metal ceramic systems has yet gained general acceptance. Such a bond test cannot be established without careful analysis of the stress distribution within the adherence region. The objective of the present study was to establish a mechanical shear stress test and combine the results with a finite element ...
Magnus Persson, Maud Bergman
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2005
The ability of the clinician to bond restorative materials to enamel has been an important achievement of modern dentistry. A variety of restorative materials that rely on enamel bonding are now available to the clinician. These materials include resin composites, compomers, hybrid ionomers, and glass ionomers.
W. H. Tate, John M. Powers
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The ability of the clinician to bond restorative materials to enamel has been an important achievement of modern dentistry. A variety of restorative materials that rely on enamel bonding are now available to the clinician. These materials include resin composites, compomers, hybrid ionomers, and glass ionomers.
W. H. Tate, John M. Powers
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Bond Strength of Bonded SOI Wafers
Japanese Journal of Applied Physics, 1992We developed a tensile strength measurement technique for bonded silicon-on-insulator (SOI) wafers. After oxidation, wafers are patterned, prior to bonding, to reduce the bonded area. After bonding and grinding, tensile strength is measured by pulling samples perpendicularly to the interface by holders adhesively fixed to the samples. The strength
Yoshihiro Arimoto, Fumitoshi Sugimoto
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1978
In the last chapter, in the section on molecular theories of fracture, almost throughout an Arrhenius equation has been used to describe the activation of element breakage. The energy of activation, U0, frequently turned out to be equal to (or was assumed to be equal to) the dissociation energy of the weakest main chain bond.
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In the last chapter, in the section on molecular theories of fracture, almost throughout an Arrhenius equation has been used to describe the activation of element breakage. The energy of activation, U0, frequently turned out to be equal to (or was assumed to be equal to) the dissociation energy of the weakest main chain bond.
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The strength of the deuterium bond
Journal of Molecular Structure, 1974Abstract The fall in frequency on deuteration, by some 4 cm−1, of the intermolecular stretching mode vσ of hydrogen bonded complexes, is larger than can be accounted for by any reasonable harmonic force field. It is shown that this does not imply a different potential function for the deuterium bond; it may be quantitatively accounted for by ...
D.L. Cummings, J.L. Wood
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Bond strength and durability of porcelain bonding systems
The Journal of Prosthetic Dentistry, 1996Because the most effective bonding system for ceramic restorations has not been documented, this study examined bond strength and durability of bonding systems joined to a feldspathic porcelain. Disks of porcelain specimens were fired on refractory investment materials and were air-abraded with alumina.
Hideo Matsumura +3 more
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Bond strengths of dentine bonding agents to dentine
British Dental Journal, 1992This study assessed comparatively the tensile bond strengths to dentine of four resin dentine bonding agents. Flat surfaces were produced in the occlusal dentine of human third molars, finished with 600-grit paper and prepared for bonding to Silux Plus composite with Gluma, Prisma Universal Bond 2, Scotchbond 2 and Tenure.
R. J. Elderton +2 more
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