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Brighenti Fernanda Lourenção - - 2013
This study evaluated the capacity of fluoride acidic dentifrices (pH 4.5) to promote enamel remineralization using a pH cycling model, comparing them with a standard dentifrice (1,100 µgF/g). Enamel blocks had their surface polished and surface hardness determined (SH). Next, they were submitted to subsurface enamel demineralization and to post-demineralization surface hardness ...
Nainan Mohan Thomas - - 2013
To assess the efficacy of 17% ethylene diamine tetra acetic acid and 7% maleic acid in the removal of 3 calcium hydroxide preparations placed as intracanal medicaments. The root canals of 60 single rooted premolars were prepared with a step back technique and randomly assigned into 3 experimental groups (n= ...
Lin Chu-Hung - - 2013
Two new triterpenoids, 2α,3β-dihydroxyolean-11,13(18)-dien-19β,28-olide (1) and 3β,5β-dihydroxyglutinol (2), together with eight known compounds (3-10) were isolated from the roots of Rhaphiolepis indica var. tashiroi (Rosaceae). The structures of 1-10 were determined by spectroscopic techniques. Among these isolates, 2α,3β-dihydroxyolean-13(18)-en-28-oic acid (9) exhibited inhibitory effect on N-formyl-methionyl-leucyl-phenylalanine (fMLP)-induced superoxide production, with an ...
Salvador Victor Hugo - - 2013
Cinnamic acid is a known allelochemical that affects seed germination and plant root growth and therefore influences several metabolic processes. In the present work, we evaluated its effects on growth, indole-3-acetic acid (IAA) oxidase and cinnamate 4-hydroxylase (C4H) activities and lignin monomer composition in soybean (Glycine max) roots. The results ...
Zein Elabdeen Hager R - - 2013
Aggressive periodontitis (AgP) is a rapidly progressing type of periodontal disease in otherwise healthy individuals which causes destruction of the supporting tissues of the teeth. The disease is initiated by pathogenic bacteria in the dental biofilm, and the severity of inflammation and attachment loss varies with the host response. Recently, ...
Raj Makesh - - 2013
Teeth are the most durable structures that resist destruction more than skeletal tissue Commercially available acids can be used to destroy the body or a part, to mask human identification. The present study examines the effect of caustic acids on human dentition. Ten upper anterior teeth each were immersed in ...
Li Hong-Xia - - 2013
Chilling tolerance was increased in seed germination and root growth of wheat seedlings grown in media containing 20 µg/mL cerebroside C (CC), isolated from the endophytic Phyllosticta sp. TG78. Seeds treated with 20 µg/mL CC at 4°C expressed the higher germination rate (77.78%), potential (23.46%), index (3.44) and the shorter ...
Vrchotová Blanka - - 2013
Degradation of chlorobenzoic acids (e.g., products of microbial degradation of PCB) by strains of microorganisms isolated from PCB contaminated soils was assessed. From seven bulk-soil isolates two strains unique in ability to degrade a wider range of chlorobenzoic acids than others were selected, individually and even in a complex mixture ...
Schemehorn B R - - 2013
To determine the applicability of a modified US FDA Caries Monograph test method for measuring the protective benefits of fluoride (F) against erosive, dietary acids. Acid-challenged teeth were treated in two studies with a dentifrice, rinsed, and then re-challenged in a series of tests using three dietary acids. Study 1 ...
Felix Kariny Ramos - - 2013
Objective: To assess the pH of regular and light cola-based drinks and energy drinks, and examine the acid neutralizing capacity by the addition of artificial saliva. Materials and methods: Ten packages of each product purchased locally at different stores were evaluated. The pH was measured by a pH-electrode calibrated in ...
Lima Rogério Barbosa - - 2013
Cinnamic acid and its hydroxylated derivatives (p-coumaric, caffeic, ferulic and sinapic acids) are known allelochemicals that affect the seed germination and root growth of many plant species. Recent studies have indicated that the reduction of root growth by these allelochemicals is associated with premature cell wall lignification. We hypothesized that ...
Drozdz Iwona I University of Agricultural in Kracow, Department of Fermentation Technology and Technical Microbiology, Cracow, Poland. - - 2013
The aim of this study was to identify various bacteria isolated from grapes and their wines. Additionally we investigated the capacity of lactic acid bacteria for microbiological deacidification of wines produced in Poland. We have identified Oenococcus oeni, Lactobacillus acidophilus and Lactobacillus delbrueckii. During the microbial deacidification process, we observed ...
Sinha Soumya S Department of Pediatric and Preventive Dentistry, M. A. Rangoonwala Dental College and Research Center, Pune, India. - - 2013
The aim of this study was to assess the efficacy of 18% hydrochloric acid and 37% phosphoric acid by an in vivo comparison. Sixty fluorotic permanent maxillary central incisors from 30 patients were divided into 3 categories. The teeth received 5 seconds (mild fluorosis), 20 seconds (moderate fluorosis) and 30 ...
Manzolli Leite Fabio Renato FR Adjunct Professor, Department of Semiology and Clinics, Federal University of Pelotas, Rio Grande do Sul, Brazil, Phone: 555332256741 e-mail: - - 2013
Objective: This study aims to compare the clot stabilization on root surfaces conditioned with citric acid and ethylenediamine-tetraacetic acid (EDTA). Materials and methods: Scaled root samples (n = 100) were set in fve groups: group I-control group (saline solution); group II (24% EDTA); group III (25% citric acid); group IV ...
Javed M Tariq - - 2012
The presence of Eriophorum angustifolium in mine tailings of pyrite maintains a neutral pH, despite weathering, thus lowering the release of toxic elements into acid mine drainage water. We investigated if the presence of slightly elevated levels of free toxic elements triggers the plant rhizosphere to change the pH towards ...
Pelton Robert - - 2012
Macroscopic and colloidal silica surfaces were readily modified with alkoxysilaneboronate, IV, yielding silica surfaces with covalently bonded phenylboronic acid groups. XPS and neutron activation confirmed the presence of boron. The ability of these surfaces to specifically to interact with polyols was demonstrated with polyol-coated latex and with ARS, a dye ...
Ghosh Sirshendu - - 2012
Oleic acid capped monodisperse SnO(2) quantum dots (QDs) of size 2.7 nm were synthesized by thermal decomposition and oxidation of Sn(II)(oleate) complex in high boiling nonpolar solvent octadecene using oleic acid as a capping agent and N-methylmorpholine N-oxide as an oxidizing agent. FTIR, DSC and TGA were employed to understand ...
Okamoto Y - - 2012
The aim of this experiment was to evaluate the histological effects of zoledronic acid on the periodontal space in rats. 40 male Wistar rats were divided into three zoledronic acid groups and a control group. Zoledronic acid was injected subcutaneously at doses of 10, 50, or 500μg/kg once a week ...
Tashkhourian Javad - - 2013
A new sensor for simultaneous determination of peroxyacetic acid and hydrogen peroxide using silver nanoparticles (Ag-NPs) as a chromogenic reagent is introduced. The silver nanoparticles have the catalytic ability for the decomposition of peroxyacetic acid and hydrogen peroxide; then the decomposition of them induces the degradation of silver nanoparticles. Hence, ...
Moron B M - - 2012
This study compared dentine demineralization induced by in vitro and in situ models, and correlated dentine surface hardness (SH), cross-sectional hardness (CSH) and mineral content by transverse microradiography (TMR). Bovine dentine specimens (n = 15/group) were demineralized in vitro with the following: MC gel (6% carboxymethylcellulose gel and 0.1 M ...
Gao Jiao - - 2012
Benzoic acid (BA) and phthalic acid (PTA) are the simplest aromatic carboxylic acids, and they can be regarded as typical model compounds in investigating the interaction of aromatic carboxylic acids with metal surfaces by use of SERS spectroscopy. In this work, we have investigated the structure and adsorption behavior of ...
Bowen William H - - 2013
The Stephan Curve has played a dominant role in caries research over the past several decades. What is so remarkable about the Stephan Curve is the plethora of interactions it illustrates and yet acid production remains the dominant focus. Using sophisticated technology, it is possible to measure pH changes in ...
Peng-Fei Liu L College of Tobacco Science / National Tobacco Cultivation & Physiology & Biochemistry Research Center, Henan Agricultural University, Zhengzhou, 450002 People's Republic of China ; Institute of Coal Chemistry, Chinese Academy of Sciences, P.O. Box 165, Taiyuan, Shanxi 030001 People's Republic of - - 2013
Baicalin is a flavonoid from the root of huangqin (Scutellaria baicalensis gcorsi, a kind of Traditional Chinese Medicine and food condiment) with two pro phenolic hydroxyls. In this manuscript, high purity of baicalin (95.5 %) was isolated from the root of huangqin and its antioxidant activities were investigated. The antioxidant properties ...
Proniewicz Edyta - - 2012
Here, we report a systematic surface-enhanced Raman spectroscopy (SERS) study of the structures of five N-benzylamino(boronphenyl)-methylphosphonic acids: N-benzylamino-(3-boronphenyl)-S-methylphosphonic acid (m-PhS), N-benzylamino-(4-boronphenyl)-S-methylphosphonic acid (p-PhS), N-benzylamino-(2-boronphenyl)-R-methylphosphonic acid (o-PhR), N-benzylamino-(3-boronphenyl)-R-methyl-phosphonic acid (m-PhR), and N-benzylamino-(4-boronphenyl)-R-methylphosphonic acid (p-PhR) adsorbed on nanometer-sized colloidal particles (20-25nm). For example, we showed that all of these molecules interact with ...
Bhattacharjee Payel - - 2012
ETHNOPHARMACOLOGICAL RELEVANCE: The aqueous extract of the roots of Aristolochia indica is used as a decoction for the ailment of a number of diseases including snake bite treatment. Though the alcoholic extract of the different parts of the plant are well studied, information on the aqueous extract is limited. We ...
Gu Jin - - 2013
Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, combustion gas analysis and N(2) adsorption were used to quantify the degree of desulfation of cellulose nanowhiskers (CNWs). CNWs were produced by hydrolyzing cotton cellulose with sulfuric acid or hydrochloric acid. Hydrochloric acid treatment did not result in any cellulose chemical modification. Hydrolysis ...
Choi Hyun Gyu - - 2012
The stem and root barks of Ulmus davidiana var. japonica (Ulmaceae) have been used to treat inflammatory diseases including mastitis, rhinitis, sinusitis, and enteritis. In an ongoing study focused on the discovery of natural anti-inflammatory compounds from natural products, a methanol extract of the stem and root barks of U. ...
Ioannidis Alexis - - 2012
OBJECTIVE: This study tested the potential hampering effects of acidic sulfur compounds (ASC) containing hydroxybenzene sulfonic acid, hydroxymethoxybenzene sulfonic acid, and sulfuric acid, prior to self-etch and etch-and-rinse bonding procedures on enamel and dentin. According to the manufacturer, ASC should be applied after cavity preparation and prior to application of ...
Aoudia Hassiba - - 2012
In the present study it was evaluated the paralysis activity, of the whole Italian and Algerian Melia azedarach fruits and parts (seeds, wood, kernel), against Meloidogyne incognita second stage juveniles (J2). Paralysis activity was evaluated in vitro after one hour and one day immersion periods of nematodes in test solutions. ...
Li Ling - - 2012
Three new triterpene saponins, ilexsaponins D-F (1-3), were isolated from the roots of Ilex pubescens. Their structures were elucidated as 3-O-β-d-glucopyranosyl(1 → 3)-α-l-arabinopyranosyl urs-12,18-diene-24,28-dioic acid 28-O-β-d-glucopyranoside (1), 3-O-β-d-glucopyranosyl(1 → 3)-α-l-arabinopyranosyl urs-12,18-diene-24,28-dioic acid (2), and 3-O-β-d-glucopyranosyl(1 → 3)-α-l-arabinoyranosyl-30-hydroxyurs-12,19-diene-24,28-dioic acid 28-O-β-d-glucopyranoside (3) on the basis of the chemical and spectroscopic evidence.
Chevalley Alice - - 2012
Artificial metalloproteins resulting from the embedding of half-sandwich Ru(ii)/Rh(iii) fatty acid derivatives within β-lactoglobulin catalysed the asymmetric transfer hydrogenation of trifluoroacetophenone with modest to good conversions and fair ee's.
Alapafuja Shakiru O SO Center for Drug Discovery and Departments of Chemistry and Chemical Biology and Pharmaceutical Sciences, Northeastern University , Boston, Massachusetts 02115, - - 2012
Sulfonyl fluorides are known to inhibit esterases. Early work from our laboratory has identified hexadecyl sulfonylfluoride (AM374) as a potent in vitro and in vivo inhibitor of fatty acid amide hydrolase (FAAH). We now report on later generation sulfonyl fluoride analogs that exhibit potent and selective inhibition of FAAH. Using ...
Tezvergil-Mutluay A A Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku, Turku, - - 2013
This study determined if dentin proteases are denatured by phosphoric acid (PA) used in etch-and-rinse dentin adhesives. Dentin beams were completely demineralized with EDTA for 30 days. We "acid-etched" experimental groups by exposing the demineralized dentin beams to 1, 10, or 37 mass% PA for 15 sec or 15 min. ...
Lacerda Talita M - - 2013
The influence of sulfuric acid concentration (HSO 5-25%, 100°C), crystallinity and fibers size on the hydrolysis reaction of sisal pulps were investigated, with the goal of evaluating both the liquor composition, as an important step in the production of bioethanol, and the residual non-hydrolyzed pulp, to determine its potential application ...
Srinivas G - - 2012
A facile no-carrier-added one pot micro-molar scale radiolabelled synthesis of 2-[(14)C]-uracil from [(14)C]-urea and propiolic acid in the presence of polyphosphoric acid (PPA) with an yield of 48.33% and with radiochemical purity of 98% is reported in this paper.
Abbasi Bilal H - - 2012
Gibberellic acid (GA(3)) is reported to have diverse effects on hairy root cultures of many plant species; therefore, the effects of GA(3) on the growth, secondary metabolite production (caffeic acid derivatives and lignin), phenylalanine ammonia lyase (PAL) activity, and free radical scavenging activity of light-grown Echinacea purpurea L. hairy roots ...
Bürger Andreas - - 2012
Magnetite (Fe(3)O(4)) is an important biomineral, e.g., used by magnetotactic bacteria. The connection between the inorganic magnetite-(111)-surface and the organic parts of the bacteria is the magnetosome membrane. The membrane is built by different magnetosome membrane proteins (MMPs), which are dominated by the four amino acids glycine (Gly), aspartic acid ...
Chen Y-Z - - 2012
AIM: To develop a novel root-end filling material (NRFM) based on hydroxyapatite, tetracalcium phosphate and polyacrylic acid, to determine its chemical composition and to compare its physical properties and cytotoxicity with those of glass-ionomer cement (GIC) and grey Portland cement (GPC). METHODOLOGY: The NRFM was prepared by blending distilled water ...
Felizeter Sebastian - - 2012
An uptake study was carried out to assess the potential human exposure to perfluorinated alkyl acids (PFAAs) through the ingestion of vegetables. Lettuce (Lactuca sativa) was grown in PFAA-spiked nutrient solutions at four different concentrations, ranging from 10 ng/l to 10 µg/l. Eleven perfluorinated carboxylic acids (PFCAs) and three perfluorinated ...
Zhang Ruifen - - 2013
The phenolic profiles and antioxidant activity of litchi pulp of 13 varieties were investigated. The free, bound and total phenolic contents were 66.17-226.03, 11.18-40.54, and 101.51-259.18mg of gallic acid equivalents/100g, respectively. The free, bound and total flavonoid contents were 16.68-110.33, 10.48-22.75, and 39.43-129.86mg of catechin equivalents/100g, respectively. Free phenolics and ...
Poudyal Sitashi - - 2012
FOR smear layer removal from root canal walls, ethylenediaminetetraacetic acid (EDTA) is an effective chelating agent and its efficiency depends upon a lot of factors such as concentration, pH, duration of application, the type of the solution, the root canal length, penetration depth of the material, and hardness of the ...
Zhou L - - 2012
OBJECTIVE: The aim of this study was to examine the effect of ursolic acid (UA) and oleanolic acid (OA), triterpenoid compounds that are isolated from many edible and medicinal plants, on cariogenic microorganisms and biofilms. METHODS: A microtitre plate dilution assay was used to determine the minimum inhibitory concentration (MIC) ...
Wu Xianna - - 2013
Polyaniline-deposited paper composites doped with three inorganic acids were prepared via in situ polymerization, and their flame-retardant properties were investigated. Both the conductivity and flame retardancy of the composite increased with the increase of the amount of the polyaniline deposited. The doping acid played a very key role in both ...
Yang Jianping - - 2012
In this paper, we report a facile one-step hydrothermal method to synthesize phase-, size-, and shape-controlled carboxyl-functionalized rare-earth fluorescence upconversion phosphors by using a small-molecule binary acid, such as malonic acid, oxalic acid, succinic acid, or tartaric acid as capping agent. The crystals, from nano- to microstructures with diverse shapes ...
Oliveira Halley Caixeta - - 2012
Plants submitted to O(2) deficiency present a series of biochemical modifications, affecting overall root metabolism. Here, the effect of hypoxia on the metabolic fate of (15)N derived from (15)NO(3) (-), (15)NO(2) (-) and (15)NH(4) (+) in isolated soybean root segments was followed by gas chromatography-mass spectrometry, to provide a detailed ...
Kaczorek Ewa - - 2012
Surface properties of newly isolated Stenotrophomonas maltophilia strain 6 were tested. The bacteria were stored in two different ways in order to determine the influence of hydrocarbons and surfactants on surface and enzymatic characteristics of the isolated strain. The influence of surface active agents, natural and synthetic, on membrane's lipid ...
Majumder Santanu - - 2012
Solar Oxidation and Removal of Arsenic (SORAS) is a low-cost non-hazardous technique for the removal of arsenic (As) from groundwater. In this study, we tested the efficiency of natural citric acid sources extracted from tomato, lemon and lime to promote SORAS for As removal at the household level. The experiment ...
Hansson David - - 2012
Fomannoxin is a biologically active benzohydrofuran, which has been suggested to be involved in the pathogenicity of the root rotting fungus Heterobasidion annosum sensu lato. The biosynthesis of fomannoxin was investigated through an isotopic enrichment study utilizing [1-(13)C]glucose as metabolic tracer. (13)C NMR spectroscopic analysis revealed the labeling pattern and ...
Oznurhan Fatih - - 2012
The aim of this in vitro study was to analyze hybrid layer and nanoleakage of composite resin restorations in cavities prepared by either Er,Cr:YSGG laser or bur, followed by acid etching in primary teeth. Ten extracted primary molar teeth were randomly allocated into two groups consisting of ten cavities according ...
Ballal Nv - - 2012
Background:  This study compared the efficacy of 10% citric acid, 17% EDTA and 7% maleic acid (MA) with ultrasonic agitation in the removal of calcium hydroxide (CH) from root canals. Methods:  Seventy maxillary anterior teeth were enlarged to F3 using protaper files. Teeth were then divided into two groups: A ...
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