نتایج جستجو برای: amongst them vast importation of porcelain wares
تعداد نتایج: 21172332 فیلتر نتایج به سال:
The shear bond strength of composite resin to porcelain was investigated to optimize variables for bonding porcelain laminate veneers. Scanning electron microscopy was initially used to examine the surface configuration of porcelain prepared under various conditions. A factorial experiment was undertaken to determine the effects of three different bonding methods on both etched and non-etched p...
the present study was conducted to investigate the effect of implicit focus on form through input flooding and the effect of noticing, explicit focus on form on linguistic accuracy. to fulfill the purpose of the study, 86 iranian pre-intermediate efl learners of one of the language institutes were chosen by means of administering ket as the homogeneity test. these learners were pretested throug...
STATEMENT OF PROBLEM Porcelain fused to zirconia prostheses are widely used. However, porcelain chipping, spalling, fracture, and delamination are common clinical problems. Residual stresses of thermal origin have received attention, but clear data and firing guidelines remain absent. PURPOSE The purpose of this study was to measure the influence of heating and cooling protocols on the streng...
“Ru-type ware” and unglazed firing bodies were unearthed from the Qingliang Temple Kiln in Baofeng County Henan province of China 2014; excavation site was close to central area ancient Ru Kuan Kiln. Ru-type ware has several similar characteristics ware. Here, four samples bodies, 10 sky green wares, seven wares selected. The chemical compositions 16 elements body glaze measured by energy-dispe...
plucking his lute, or the gallant tossing a kiss to his lady, though less dramatic and more tranquil, seem also to have been transfixed in the midst of activity. We are today so familiar with porcelain, particularly in its utilitarian forms, that we can hardly conceive the thrill with which it was regarded when it was first produced in Europe. For a long time oriental porcelain had been enormou...
The accumulated knowledge about the structure of a substance makes it possible to control its properties, including purposeful selection raw materials and for creation, vice versa, based on natural or artificial material composition, predict physical chemical properties. This approach allows choosing replacement rare even scarce types mineral produce particular product. analysis literature data...
heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...
abstract the current study set out to address the issue as to whether the implementation of portfolio assessment would give rise to iranian pre-intermediate efl learner autonomy. participants comprised 60 female in pre-intermediate level within the age range of 16-28.they were selected from among 90 language learners based on their scores on language proficiency test -key english test. then, t...
one of the most important number sequences in mathematics is fibonacci sequence. fibonacci sequence except for mathematics is applied to other branches of science such as physics and arts. in fact, between anesthetics and this sequence there exists a wonderful relation. fibonacci sequence has an importance characteristic which is the golden number. in this thesis, the golden number is observed ...
Statement of Problem: In order to eliminate the esthetic problem of metal collar in porcelain fused to metal crowns various techniques, such as shoulder porcelain, have been suggested. Purpose: The aim of this study was to investigate the effects of repeated porcelain firing cycles on the marginal integrity of shoulder in porcelain fused to metal crowns, made of two kinds of alloys: noble and b...
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