PURPOSE Numerous methods were used to etch the fiber posts to improve its bonding to root canal dentin. Our aim was to evaluate the efficacy of 37% phosphoric acid in etching fiber posts in comparison with 24% hydrogen peroxide. MATERIALS AND METHODS Ninety human maxillary central incisors were taken and post space preparation was done. Ninety fiber posts were taken and divided into three gro...

Arsenic (As) in groundwater and surface water is a worldwide problem possessing a serious threat to public health. In this study, a magnetic ferrite, was synthesized and investigated for its As(V) removal efficiency. The adsorption of As(V) by magnetic ferrite exhibited an L-shaped nonlinear isotherm, suggesting limiting binding sites on the adsorbent surface. The As K-edge X-Ray Absorption Nea...

EXPERIMENTAL SECTION Materials and reagents Tetrabutyl titanate (TBOT), sodium dodecyl sulfate (SDS), sodium dodecyl benzene sulfonate (SDBS) and phosphoric acid (H3PO4) were from Nanjing Chemical Reagent Co., Ltd. (Nanjing, China). Human IgG (HIgG) (Ag), rabbit anti-human IgG (Ab1), and goat anti-human IgG (Ab2) were purchased from Beijing Biosynthesis Biotechnology Co., Ltd. (Beijing, China)....

C-13 isotope fractionation in the decarboxylation of phenylpropiolic acid (PPA) in the 10% solution of diphosphoric acid (H4P2O7) in orthophosphoric acid (H3PO4) and in the solution of diphosphoric acid in metaphosphoric acid (HPO3) has been studied between 20–140 C (293.16–413.16). The initial C fractionation observed in the decarboxylation of PPA in 10% solution of H4P2O7 in H3PO4 in the temp...

active carbons were produced from bagasse, millet and sorghum straws by chemical activation with h3po4. carbon precursors with particle size of 1180 î¼m were used, in order to overcome difficulties caused by low density and high ash content. the influence of preparation conditions (temperature, residence time, and acid impregnation ratio) on the yield of the active carbons was examined. the imp...

The inhibitive effect of apricot gum AG on mild steel in 0.5 M phosphoric acid solution was investigated by potentiodynamic polarization, electrochemical impedance spectroscopy EIS, linear polarization resistance and electrochemical noise EN techniques. The inhibition efficiency increased with increasing AG concentration up to a certain value and decreased with increasing temperature. Polarizat...

Arang aktif ampas kopi arabika dengan perbedaan aktivator (HCl dan H3PO4) memiliki potensi sebagai adsorber terhadap kromium pada limbah tekstil buatan. Ampas dapat digunakan bahan baku arang karena mempunyai kadar karbon yang cukup tinggi. Limbah dibuat menggunakan serbuk Chromic Acid perbandingan 1:10 Aquadest. Konsentrasi HCl H3PO4 masing-masing adalah 0,1 N. pengeringan selama 24 jam dilaku...

The purpose of this study was to establish whether UV/ozone (O3) irradiation method can effectively decontaminate hydroxyapatite surfaces, including those modified by the treatment with 30% phosphoric acid solution through morphological and chemical surface analyses (surface roughness, X-ray photoelectron spectroscopy and wettability), and to evaluate the in vitro response of osteoblast-like MC...