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Arslan Hakan H Department of Endodontics, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, - - 2014
The aim of this study was to evaluate the effect of citric acid irrigation on root fracture in different concentrations and at various time exposures on root fracture. Forty-eight human mandibular incisors with similar dimensions were selected. The specimens were decoronated, then divided into 6 groups as follows: A group ...
Barbour Michele E ME School of Oral and Dental Sciences, University of Bristol, Bristol, - - 2014
When considering the erosive potential of a food or drink, a number of factors must be taken into account. pH is arguably the single most important parameter in determining the rate of erosive tissue dissolution. There is no clear-cut critical pH for erosion as there is for caries. At low ...
Bolhari Behnam B Dental Research Center, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran; Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, - - 2014
The aim of this study was to compare the surface microhardness of BioAggregate, ProRoot MTA, and CEM Cement when exposed to an acidic environment or phosphate-buffered saline (PBS) as a synthetic tissue fluid. Ninety cylindrical molds made of polymethyl methacrylate with an internal diameter of 6 mm and height of ...
Neilands Jessica J Department of Oral Biology, Faculty of Odontology, Malmö University, Malmö, Sweden. Electronic address: - - 2014
To investigate the effect of delmopinol and fluoride alone or in combination on acid adaptation and acid production in plaque biofilm bacteria in vitro. The effect of delmopinol and fluoride on acid adaptation was tested by exposing the biofilm bacteria, grown in a mini-flow cell system under static conditions, to ...
Doig Michael M School of Chemistry, University of Edinburgh , West Mains Road, Edinburgh EH9 3JJ, - - 2013
The structure and friction of fatty acid surfactant films adsorbed on iron oxide surfaces lubricated by squalane are examined using large-scale molecular dynamics simulations. The structures of stearic acid and oleic acid films under static and shear conditions, and at various surface coverages, are described in detail, and the effects ...
Mohammed Nasrine R NR Barts and The London School of Medicine and Dentistry, Queen Mary University, Dental Physical Sciences Unit, Centre for Oral Growth and Development, London, E1 4NS, United Kingdom. Electronic address: - - 2013
The aim of the present study was to measure the effects of fluoride concentration on the real-time in vitro demineralization of enamel during exposure to caries-simulating conditions using Scanning Microradiography (SMR). Enamel blocks obtained from non-carious human molars were fixed in SMR environmental cells, through which acidic solutions (0.1M acetic ...
Damkier Helle H HH Department of Biomedicine, Aarhus University, - - 2013
It is disputed if ameloblasts in the maturation zone of the enamel organ mainly buffer protons released by hydroxyapatite (HA) crystal growth or if they periodically secrete protons to create alternating acidic and alkaline conditions. The latter hypothesis predicts alternating pH regimes in maturing enamel, which would be affected by ...
Elnaghy Amr M AM Department of Conservative Dentistry and Endodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt. Electronic address: - - 2014
The purpose of this study was to evaluate the surface microhardness, compressive strength, bond strength, and morphologic microstructures of Biodentine (BD; Septodont, Saint Maur des Fossés, France) and white mineral trioxide aggregate (WMTA) after exposure to a range of acidic pH levels. For each test, 4 groups of each material ...
Ding Wen-Bing - - 2013
A new intact resin glycoside (3) and two glycosidic acids (1 and 2), all having a common trisaccharide moiety and (11S)-hydroxytetradecanoic acid or (3S,11S)-dihydroxytetradecanoic acid as the aglycone, were obtained from the roots of Porana duclouxii. Their structures were elucidated by spectroscopic analyses and chemical correlations. These compounds represent the ...
Magaia Telma - - 2013
The harvesting, utilization and marketing of indigenous fruits and nuts have been central to the livelihoods of the majority of rural communities in African countries. In this study we report on the content of dietary fiber, minerals and selected organic acids in the pulps and kernels of the wild fruits ...
Ballal N V NV Manipal College of Dental Sciences, Manipal University, Karnataka, India. - - 2013
Aim of this study was to evaluate the effect of 7% maleic acid and 17% ethylenediaminetetraacetic acid (EDTA) on the shear bond strength of RealSeal SE sealer to root canal dentin. Twenty incisors were split into coronal, middle and apical third and were treated in the following manner: Group 1: ...
Gómez-Hurtado Mario A MA Area Académica de Química, Universidad Autónoma del Estado de Hidalgo, Km 4.5 Carretera Pachuca-Tulancingo, Mineral de la Reforma, Hidalgo 42184, - - 2013
The alkaloid extract from the roots of Chromolaena pulchella provided two new pyrrolizidine alkaloids, elucidated as (-)-supinidine triviridiflorate (1) and (-)-supinidine diviridiflorate (2) based on their physical and spectroscopic properties. Their absolute configuration was determined by chemical correlation with (-)-supinidine (3) and (+)-viridifloric acid (4).
Mi Junling - - 2013
Two new triterpenoids were isolated from the ethanolic extract of the roots of Ampelopsis japonica (Thunb.) Makino. Their structures were defined as 3α-trans-feruloyloxy-2α-O-acetylurs-12-en-28-oic acid (1) and methyl 3α-trans-feruloyloxy-2α-hydroxyurs-12-en-28-oate (2) on the basis of spectral analysis.
Ahn Jihoon - - 2013
In order to use iron oxide nanoparticles (Fe3O4) in various applications, a surface modification that provides colloidal stability and additional functionality to the nanoparticles is necessary. For the modification of the nanoparticle surface with ligand molecules, the ligand molecule should contain an anchor group that has a strong affinity for ...
Cai Shenwen - - 2013
The present study aimed to test a hypothesis that acid invertases in root of metallophytes might play important roles in root growth under heavy metal stress. Plants of two contrasting populations, one from an ancient Cu mine (MP) and the other from a non-contaminated site (NMP), of metallophyte Elsholtzia haichowensis ...
Zaima Kazumasa - - 2013
A new amino acid-sesquiterpene adduct, isoheleproline (1), was isolated from the roots of Inula helenium (elecampane), together with four known sesquiterpene lactones (2-5). The planar configuration of 1 was elucidated on the basis of spectroscopic data analysis, and the relative configuration of 1 was determined by performing a detailed analysis ...
Guo Peijun P School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, P.R. - - 2014
The aim of this study was to investigate the correlation between root respiration and the percentage of active components in licorice (Glycyrrhiza uralensis Fisch.), in order to provide a foundation for the regulation and modulation of the quality of G. uralensis. Respiration efflux of annual and biennial G. uralensis was ...
Vints Inna - - 2013
Aryl boronic acids or pinacol esters containing EDG were converted in good yields and fast reactions to the corresponding aryl fluorides by using the readily obtainable solutions of AcOF. In reactions with aryl boronic acids containing EWG at the para position there are two competing forces one directing the fluorination ...
Paepegaey Aude-Marine - - 2013
To compare three instruments for their ability to quantify enamel loss after acid erosion. 6 randomized parallel groups of bovine enamel samples were subjected to citric acid (higher acidity) or orange juice (lower acidity) erosion and remineralisation in a cycling model. Two protected shoulders were created on each of the ...
Bosco Renato - - 2013
Plant hormones play a crucial role in controlling plant growth and development. These groups of naturally occurring substances trigger physiological processes at very low concentrations, which mandate sensitive techniques for their quantitation. This paper describes a method to quantify endogenous (±)-2-cis-4-trans-abscisic acid, indole-3-acetic acid, indole-3-propionic acid, and indole-3-butyric acid. The ...
Yang Song-Yi - - 2013
The aim of this study was to examine the effects of 45S5 bioactive glass (BAG) on the acid neutralizing, mechanical and physical properties of pit and fissure sealants. 45S5BAG (<25μm) was mixed with the silanized glass (180±30nm) and added into a resin matrix [Bis-GMA/TEGDMA 50/50 (wt%) containing 1% of DMAEMA/CQ ...
Knittel Fabien - - 2013
The interaction of ligands with the surface of quantum dots (QD) was studied using tritiated oleic acid as an ultra-sensitive reporter. The use of labeled oleic acid not only permitted to quantify the number of ligands attached to the surface of QDs of various sizes but also enabled the investigation ...
Teng Xiyao - - 2013
The surface characteristics of graphene oxide nanosheets (GO) treated respectively with tartaric acid, malic acid and oxalic acid, have been investigated by mainly using optical spectroscopic methods including Fourier transform infrared spectroscopy (FT-IR), Ultraviolet-visible (UV-Vis) absorption and Raman spectroscopy. Additionally, the electrochemical property of the products has also been studied. ...
Runnel Riina - - 2013
The objective of the present paper is to report results from oral biologic studies carried out in connection with a caries study. Samples of whole-mouth saliva and dental plaque were collected from initially 7- to 8-year-old subjects who participated in a 3-year school-based programme investigating the effect of the consumption ...
Krippner Johanna - - 2013
Maize is the most important grain crop grown for human nutrition, animal fodder and biogas production worldwide. Nonetheless, no systematic studies have been undertaken on these plants to examine the uptake mechanisms for perfluoroalkyl substances (PFASs) dependent upon chain length and pH value. The aim of the present study was ...
Ueda Tsuyoshi - - 2013
N-Formylsaccharin, an easily accessible crystalline compound, has been employed as an efficient CO source in Pd-catalyzed fluorocarbonylation of aryl halides to afford the corresponding acyl fluorides in high yields. The reactions use a near-stoichiometric amount of the CO source (1.2 equiv) and tolerate diverse functional groups. The acyl fluorides obtained ...
Agulló-Antón María-Ángeles - - 2013
The rooting of stem cuttings is a common vegetative propagation practice in many ornamental species. A detailed analysis of the morphological changes occurring in the basal region of cultivated carnation cuttings during the early stages of adventitious rooting was carried out and the physiological modifications induced by exogenous auxin application ...
Hendricks Julie L - - 2013
To measure the pH, titratable acidity, fluoride concentration and erosive potential of brewed teas. Bag teas were purchased to represent black, green, citrus, fruity, and floral tea flavors from Tulsi, Bigelow, HyVee, Tazo, and Yogi brands and brewed (1 bag/240 ml) in boiling water for 3 minutes. The pH, titratable ...
Tahmassebi J F - - 2013
This prospective, randomised in vitro study was to investigate the pH and titratable acidity of fruit smoothie drinks and to assess the effect of these drinks on enamel erosion. Fifty enamel slabs were divided into five groups which were allocated to the sample solutions groups: Innocent(®) smoothie strawberries and bananas ...
Danelon Marcelle - - 2013
The objective of this study was to evaluate the in vitro effect of low-fluoride (F) gels supplemented with sodium trimetaphosphate (TMP) on enamel demineralization. Bovine enamel blocks (n = 160) were selected based on surface hardness (SH) and divided into eight treatment groups (n = 20 per group): no F or TMP (placebo), 3 % ...
Shellis R P - - 2013
To quantify the relationships between buffering properties and acid erosion and hence improve models of erosive potential of acidic drinks, a pH-stat was used to measure the rate of enamel dissolution in solutions of citric, malic and lactic acids, with pH 2.4-3.6 and with acid concentrations adjusted to give buffer ...
Caboni Pierluigi - - 2013
The nematicidal activity along with the chemical characterisation of aqueous extracts and essential oils of three mint species, namely Mentha x piperita, Mentha spicata and Mentha pulegium were investigated. The phytochemical analysis of the essential oils was performed by means of GC/MS, while the aqueous extracts were analysed by LC/MS. ...
Nam Sung Min - - 2013
Valeriana officinalis is used in herbal medicine of many cultures as mild sedatives and tranquilizers. In this study, we investigated the effects of extract from valerian root extracts and its major component, valerenic acid on memory function, cell proliferation, neuroblast differentiation, serum corticosterone, and lipid peroxidation in adult and aged ...
Rasheed Dalia M - - 2013
Over 100 species of the genus Salsola are distributed in dry, arid parts of Asia, Europe and Africa, of which many species are recognised as antifungal, anticancer, antihypertensive and anthelmintic agents. Egyptian Salsola received scant characterisation of either its phytochemical composition or its biological effects. In this study, the metabolite ...
Joo Ji Bong - - 2013
Mesoporous hollow colloidal particles with well-defined characteristics have potential use in many applications. In liquid-phase catalysis, in particular, they can provide a large active surface area, reduced diffusion resistance, improved accessibility to reactants, and excellent dispersity in reaction media. Herein, we report the tailored synthesis of sulfated ZrO2 hollow nanostructures ...
Vishwanath Sollapura J - - 2013
Suberin is found in a variety of tissue such as root endoderms and periderms, storage tuber periderms, trees cork layer, and seed coats. It acts as a hydrophobic barrier to control the movement of water, gases and solutes as well as an anti-microbial barrier. Suberin consists of polymerized phenolics, glycerol, ...
Rigét Frank - - 2013
Time-series of perfluorinated alkylated substances (PFASs) in East Greenland polar bears and East and West Greenland ringed seals were updated in order to deduce whether a response to the major reduction in perfluoroalkyl production in the early 2000s had occurred. Previous studies had documented an exponential increase of perfluorooctane sulphonate ...
Nascimento Fernanda C - - 2013
The large enhancement of signal observed in surface enhanced Raman spectroscopy (SERS) could be helpful for identifying amino acids on the surface of other planets, in particular for Mars, as well as in prebiotic chemistry experiments of interaction minerals/amino acids. This paper reports the effect of several substances (NaCl, MgCl2, ...
Batalha-Silva Silvana - - 2013
This study sought to measure the microtensile bond strength of a nanofilled composite resin to human dentin after phosphoric acid etching followed by nonvital bleaching. Scanning electron microscopy was used to analyze fracture modes. Twenty extracted sound human maxillary premolars were prepared for Class I defects and assigned randomly to ...
Bagherian Ali A Department of Pediatric Dentistry, Dental School, Rafsanjan University of Medical Sciences, Rafsanjan, - - 2013
A prolonged life of fissure sealant has always been the target for preventing caries in vulnerable newly erupted teeth. The use of preparatory techniques including bur introduction to the fissures is considered among such improving steps. Ninety freshly extracted healthy maxillary premolar teeth were randomly selected for this investigation. Teeth ...
Mohammadi Zahed Z Iranian Center for Endodontic Research (ICER), Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, - - 2013
Ethylenediaminetetraacetic acid (EDTA) is a chelating agent can bind to metals via four carboxylate and two amine groups. It is a polyamino carboxylic acid and a colorless, water-soluble solid, which is widely used to dissolve lime scale. It is produced as several salts, notably disodium EDTA and calcium disodium EDTA. ...
Eom Sora - - 2013
We developed a fast and simple method to functionalize a quartz crystal microbalance (QCM) with liposomes composed of phosphatidylcholine lipid and the N-hydroxysuccinimide (NHS) ester of palmitic acid. The liposome was applied directly to a bare gold surface of a QCM to prepare the lipid bilayer presenting NHS groups on ...
Do Dominic D Department of Mechanical Engineering, University of Maryland Baltimore County, Baltimore, MD 21250, - - 2013
Composite restorations accumulate more biofilm than other dental materials. This increases the likelihood for the hard tissues supporting a restoration (i.e. dentin and enamel) to be exposed to acidic conditions beyond that resulting from dietary variations. In this investigation the fatigue strength and fatigue crack growth resistance of human coronal ...
Ali Hanein - - 2013
To measure, in vitro, the pH and titratable acidity (TA) of various soft drinks and to assess the erosive effect of smoothies using an in situ model. The in vitro phase of this study included measuring the inherent pH of six different commercially available smoothies, diet coke, and citric acid ...
Choi Eun-Kyoung EK Department of Environmental Education, Sunchon National University, #255 Jungang-ro, Sunchon, Jeonnam 540-742, - - 2013
Formic acid was used for the nitrate reduction as a reductant in the presence of Pd:Cu/gamma-alumina catalysts. The surface characteristics of the bimetallic catalyst synthesized by wet impregnation were investigated by SEM, TEM-EDS. The metals were not distributed homogeneously on the surface of catalyst, although the total contents of both ...
Aykut-Yetkiner Arzu - - 2013
The objective of this in vitro study was to investigate the effect of viscosity-modified soft acidic drinks on enamel erosion. A total of 108 bovine enamel samples (∅ = 3 mm) were embedded in acrylic resin and allocated into six groups (n = 18). Soft acidic drinks (orange juice, Coca-Cola, Sprite) were used both in ...
Turi Christina E - - 2013
Ligusticum canbyi (J.M. Coult & Rose) is a medicinal understory forest species used in traditional rituals and ceremonies for spiritual enlightenment and improved mental health. Very little is known about the phytochemical complexity or diversity of L. canbyi tissues or extracts. The current study was undertaken to determine whether Ligusticum tissues ...
Razvag Yair - - 2013
This paper describes single-molecule force spectroscopy measurements of the interaction between individual amino acid residues and inorganic surfaces in an aqueous solution. In each measurement there is an amino acid residue, lysine, glutamate, phenylalanine, leucine, or glutamine, each represents a class of amino acids (positively or negatively charged, aromatic, nonpolar ...
Rölla Gunnar - - 2013
Abstract Objective. To examine the erosion-inhibiting effect of different concentrations of hydrofluoric acid. Materials and methods. Thirty-six human molars were individually treated with 10 ml of 0.1 M citric acid for 30 min (Etch 1), acid was collected and stored until analysis. The teeth were randomly divided into six groups ...
Eliades George - - 2013
To evaluate the effect of desensitising agents on human dentine morphology and composition. Randomly assigned human coronal-dentine specimens were subjected to: (a) no treatment (smear-layer control, n=4); (b) acid etching with 6% citric acid (demineralised control, n=4); (c) treatment with desensitising agents (12 cycles of 60 s treatment with 60 ...
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