The objective of this study was to compare potassium hydrogen difluoride (KHF2) etching for zirconia with commonly used surface roughening and chemical bonding methods (silane, MDP-monomer primer) resin-based luting cement zirconia. Zirconia specimens were divided into six groups (n=10) according treatment procedures, without thermocycling (6,000 cycles, 5–55ºC): 1) air-borne particle abrasion ...

Water soluble homo-base polynucleotide analogues were synthesized in which polyvinyl alcohol and partially phosphonated polyvinyl alcohol constituted the backbones,onto which were grafted uracil or adenine via 1,3-dioxane spacers formed by acetal formation with the 1,3-diol moieties in PVA. The resulting adenine-PVA polynucleotide analogs exhibited hyperchromic effects, which was not the case f...

Different polymer formulations possess unique chemical, physical, and mechanical properties. Small variations in the structure of a given polymer formulation can significantly change its characteristics, resulting in new functions and applications. For example, polyvinyl alcohol is a water-soluble synthetic polymer made by alcoholysis of polyvinyl acetate. Its chemical and physical properties d...

Angiomyolipomas (AMLs) are hamartomatous lesions consisting of abnormal blood vessels, smooth muscle, and adipose tissue. Bilateral AMLs invariably point to a diagnosis of tuberous sclerosis complex (TSC). The risk of hemorrhage in AML is related to tumor size, growth of the tumor, hypervascularization, presence of aneurysms, and association with TSC. We report a case of a young male who presen...

Objectives: Bonding of zirconia crowns and bridges to abutments is important, not only bonding of the thin resin layer to the abutment, but also bonding to the zirconia ceramic is crucial. Both mechanical and chemical adhesion are desired. Mechanical retention of dental porcelain achieved by etching with moderately concentrated hydrofluoric acid is not possible with zirconia ceramics. The purpo...

As an alternative to Li-ion battery (LIB) microporous membrane separators that are typically comprised of polyolefins, other materials and separator morphologies may yield increased cell performance. Here, we present a new class LIB comprising poly(vinylidene difluoride) (PVDF)-based highly branched, colloidal polymer particulates, called soft dendritic colloids, produced by shear-driven precip...

background polyvinyl alcohol (pva) is one of the well-known polymers, which has been used in numerous biomedical applications because of its good biocompatibility. objectives due to problems made by the therapeutics already used for leishmaniasis, the aim of this study was to evaluate the effect of pva containing artemether in treating cutaneous leishmaniasis in balb/c mice. materials and metho...

This report was prepared by the author and does not represent the opinions of The University of Oregon or any of its affiliates. p. 53 © Basel Action Network. PVC coated wire waste sorted and burned by villagers in Guiyu, China. Cancer causing polycyclic aromatic hydrocarbons and dioxins will result from burning wires made from PVC and brominated flame retardants. p. 77 © Bryce lankard/Greenpea...