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Results 101 - 150 of 1414
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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 ...
Zhang Ru - - 2013
A lysine histidine transporter (LHT) cDNA was isolated and characterized from the roots of Panax ginseng, designated PgLHT. The cDNA is 1,865 bp with an open reading frame that codes for a protein with 449 amino acids and a calculated molecular mass of 50.6 kDa with a predicted isoelectric point ...
Gottumukkala Sruthima N V S SN Department of Periodontics and Implantology, Vishnu Dental College, Bhimavaram, Andhra Pradesh, - - 2013
Despite major advances in periodontal regeneration over the past three decades, complete regeneration of the lost periodontium on a regular and predictable basis in humans has still remained elusive. The identification of stem cells in the periodontal ligament together with the growing concept of tissue engineering has opened new vistas ...
Li Xi - - 2013
In this paper, four organic acids constituents of Plateau alfalfa roots have been identified and detected by a novel capillary electrophoresis (CE) strategy which combined chitosan (CS) trapping and cetyltrimethyl ammonium bromide (CTAB) assisted sample stacking. Under the optimized condition, organic acids, i.e., aconitic acid, gallic acid, citric acid and ...
Schlicht Markus - - 2013
Controlled plant growth requires regulation through a variety of signaling molecules, including steroids, peptides, radicals of oxygen and nitrogen, as well as the 'classical' phytohormone groups. Auxin is critical for the control of plant growth and also orchestrates many developmental processes, such as the formation of new roots. It modulates ...
Norambuena Luis - - 2013
A simple and rapid method for the detection and extraction of oxolinic acid, flumequine, florfenicol and oxytetracycline from marine sediments was developed and validated. The analytes were extracted from the marine sediment using a solution of oxalic acid diluted in methanol with sonication before detection by HPLC using a diode-array ...
Ahkami Amir H - - 2013
To determine the contribution of polar auxin transport (PAT) to auxin accumulation and to adventitious root (AR) formation in the stem base of Petunia hybrida shoot tip cuttings, the level of indole-3-acetic acid (IAA) was monitored in non-treated cuttings and cuttings treated with the auxin transport blocker naphthylphthalamic acid (NPA) ...
Zhou Chenchen - - 2013
OBJECTIVES: Composites are the principal material for tooth cavity restorations due to their esthetics and direct-filling capabilities. However, composites accumulate biofilms in vivo, and secondary caries due to biofilm acids is the main cause of restoration failure. The objectives of this study were to: (1) synthesize new antibacterial monomers and ...
Xu Qinghua - - 2013
Nanocrystalline cellulose (NCC) isolated from bleached aspen kraft pulp was characterized, and its application as pulp strengthening additive and retention aid was investigated. Results showed that NCC with high crystallinity of more than 80% can be obtained using 64wt % sulfuric acid. The structure of nanocrystalline cellulose is parallelepiped rod-like, ...
Novac O - - 2013
N-(2-aminoethyl)-2-acetamidyl gellan gum (GCM-EDA) was prepared by carboxymethylation (via nucleophilic substitution of primary hydroxyl groups of the β-d-glucose unit of gellan gum, in the presence of alkali and chloroacetic acid) and reaction with tert-butyl N-(2-aminoethyl) carbamate (N-Boc-EDA) using 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDAC) as an activator, followed by deprotection with trifluoroacetic acid. ...
Martinez G L - - 2013
BACKGROUND AND OBJECTIVE: Our group recently found higher levels of serum long chain-polyunsaturated fatty acids (LC-PUFAs) in patients with chronic periodontitis compared to controls. However, the effect of periodontal treatment on LC-PUFA serum levels has not been investigated. The primary aim of the present study was to investigate the impact ...
Ugochukwu Uzochukwu C - - 2013
The role of clay minerals in crude oil saturated hydrocarbon removal during biodegradation was investigated in aqueous clay/saturated hydrocarbon microcosm experiments with a hydrocarbon degrading microorganism community. The clay minerals used for this study were montmorillonite, palygorskite, saponite and kaolinite. The clay mineral samples were treated with hydrochloric acid and ...
Yonemoto-Kobayashi Misato - - 2013
The facile syntheses of a variety functionalized propiolic acids were achieved by carboxylation of alkynylsilanes with carbon dioxide mediated by cesium fluoride under ambient conditions.
Butt Naziya - - 2013
Organic acids have the potential to decrease the strength of mineral trioxide aggregate (MTA) during retreatment. However, this might cause alterations in dentin composition and structure. The aim of this study was to assess the efficacy of chemicals on surface microhardness of white MTA (WMTA) and dentin. White MTA-Angelus(®) was ...
Yavari Hamid Reza - - 2013
The aim of the present study was to evaluate solubility of white mineral trioxide aggregate (WMTA) in an acidic environment. Twenty-four metal rings were prepared, filled with WMTA and randomly divided into two groups. The samples in groups 1 and 2 were set in synthetic tissue fluid with pH values ...
Dahiya Parveen - - 2013
Hyaluronic acid is a naturally occurring linear polysaccharide of the extracellular matrix of connective tissue, synovial fluid, and other tissues. Its use in the treatment of the inflammatory process is established in medical areas such as orthopedics, dermatology, and ophthalmology. The Pubmed/Medline database was searched for keywords "Hyaluronic acid and ...
Khoroushi Maryam - - 2013
Polymerization of resin-modified glass-ionomers (RMGIs) is mediated through two competing mechanisms: An acid-base reaction and a light-dependent resin polymerization. Furthermore, pre-conditioning with acid has resulted in an increase in enamel bond strength of some RMGIs. This in vitro study evaluated the effect of pre-conditioning and/or delayed irradiation on bond strength ...
Wang Zhiwei - - 2013
Reversible surface wetting behavior is a hot topic of research due to the potential engineering applications. In the present work, a hierarchical micro/nano-structure is fabricated on brass by alternate current (AC) etching. The superhydrophilic as-prepared etched brass (EB) turns into superhydrophobic after the modification of stearic acid for 1 min. ...
Wang Fang-Ping - - 2013
The adsorption behaviors of three carboxyl hydroxamic acids on diaspore (010) and kaolinite (001) have been studied by density functional theory (DFT) and molecular dynamics (MD) method. The results indicated that carboxyl hydroxamic acids could adsorb on diaspore surface by ionic bonds and hydrogen bonds, and adsorb on kaolinite surface ...
Zhang Zhen-Xia - - 2013
Three new sulfated triterpene glycosides, asprellanosides C-E (1-3), were isolated from the roots of Ilex asprella. Their structures were elucidated as 3β-[(2-O-sulfo-β-d-xylopyranosyl)oxy]urs-12,19(29)-diene-28-oic acid 28-β-d-glucopyranoside (1), 3β-[(2-O-sulfo-β-d-xylopyranosyl)oxy]urs-12,19-diene-28-oic acid 28-β-d-glucopyranoside (2), and 3β-[(2-O-sulfo-β-d-xylopyranosyl)oxy]urs-12,19-diene-28-oic acid (3) on the basis of the spectral and chemical methods.
Ling Zhenmin Z Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, - - 2013
Applying in silico simulations and in vitro experiments, the amino acid proline was proved to have a profound influence on Streptomyces griseus trypsinogen, and the hydrogen bond between H(57) and D(102) was found to be crucial for trypsin activity. By introducing an artificial propeptide, IVEF, the titer of trypsin was ...
Grippo John O - - 2013
Although there is a high prevalence of noncarious cervical lesions (NCCLs), the etiology of these lesions remains contentious. To evaluate the combined effects of cyclic fatigue stress and biocorrosion activity on NCCLs. Extracted premolar teeth were allocated into four groups (N = 10). Two groups were cyclically fatigue loaded (100 N; 72 cycles ...
Jeevitha M - - 2013
The amount of dietary fibre, mineral and vitamin were determined in root, rhizome and leaf of four commonly-available seagrasses, Cymodocea serrulata, Syringodium isoetifolium, Halophila ovalis and Halodule pinifolia at a station off Hare Island, Tuticorin (8°45' N, 78°12' E) in the Gulf of Mannar Biosphere region during premonsoon (July-September), monsoon ...
Miller Ruben J - - 2013
Very little research has been carried out investigating techniques for the restoration of obliterated serial numbers on vehicle glass. A study into the effectiveness of hydrofluoric (HF) acid, a known etchant for glass, has been performed. Character sequences previously etched into panes of vehicle glass were sanded to varying depths ...
Zhou Juan - - 2013
We investigated and compared the physicochemical properties (moisture, color, ash, pH, electrical conductivity, free acidity, lactonic acidity, total acidity, fructose, glucose, sucrose, diastase activity, and HMF) and mineral contents (Al, Ca, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Na, Ni, As, Cd, Pb, and Zn), as well as total ...
Albayrak Sevil - - 2013
To evaluate total phenolic, antioxidant and antimicrobial activities of methanolic extracts of the Wiedemannia multifida (W. multifida) and Wiedemannnia orientalis (W. orientalis). Phosmomolybdenum assay, DPPH radical scavenging activity and β-carotene-linoleate bleaching were used to evaluate the antioxidant capacity. The total phenolics were found to be (22.45±0.60) and (9.53±0.00) mg gallic ...
Burnett Gary R - - 2013
To compare the relative performance, in an in vitro assay, of a standard dentifrice (Colgate Cavity Protection) with an experimental anhydrous 0.454% w/w stannous fluoride dentifrice at protecting the dentin smear layer against dietary acids. Artificial smear layers were created on bovine dentin, contacted with slurries of the dentifrices, then ...
Abed Ahmad Moghare - - 2013
In periodontal diseases, contamination of roots with bacteria and their active biologic agents and smear layer formation following periodontal treatments, prevents reattachment of periodontal cells. As a matter of fact biomodification of root surface and removal of smear layer and debris is critical for regeneration of periodontal structures. The aim ...
De Baere S - - 2013
A rapid and sensitive HPLC-UV method for the quantitative determination of four short-chain fatty acids (SCFAs) and lactic acid (LA) produced during in vitro fermentation is presented. Extraction of SCFAs from supernatants of bacterial cultures is aggravated due to their polarity and volatility. Detection can only be performed at a ...
Grebner Wiebke W Department of Pharmaceutical Biology, Julius-von-Sachs-Institute for Biosciences, Biocenter, University of Wuerzburg, 97082 Wuerzburg, - - 2013
Jasmonates are oxylipin signals that play important roles in the development of fertile flowers and in defense against pathogens and herbivores in leaves. The aim of this work was to understand the synthesis and function of jasmonates in roots. Grafting experiments with a jasmonate-deficient mutant demonstrated that roots produce jasmonates ...
Pugliese Alexandre G - - 2013
The ascorbic acid, flavonoids and proanthocyanidins content and in vitro antioxidant activity of fresh pulps and seeds of cupuassu, harvested at three different times of the year, and in commercial frozen pulps were evaluated. Lipids, total phenolics contents and antioxidant activities were the highest in the seeds, followed by fresh ...
Zalizniak I - - 2013
A new glass-ionomer cement (GIC) (Fuji VII™ EP) includes 3% (w/w) casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) to enhance ion release. OBJECTIVES: To assess this new GIC compared with a GIC without CPP-ACP (Fuji VII™) with respect to ion release, changes in surface hardness and in mass under a variety of ...
Tayade A B - - 2013
 Our aim was to assess the antioxidant capacities and phenolic constituents of methanol and aqueous extracts of Rhodiola imbricata Edgew. root from Trans-Himalayan cold desert of Ladakh. The 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radical scavenging capacity of the root extracts increased in a dose-dependent manner (up to 0.1 mg/mL) ...
Shelley Israt Jahan - - 2013
We have identified a gene, SHORT LATERAL ROOT LENGTH1 (SLL1), which is important for the elongation of lateral roots in rice. An sll1 mutant has decreased lateral root growth due to a defect in the cell elongation. The SLL1 gene encodes a member of the stearoyl-acyl carrier protein fatty acid ...
Alves Flávio Rodrigues Ferreira - - 2013
This study evaluated the in vitro effects of four natural substances on the biomass of bacterial biofilms to assess their potential use as root canal irrigants. The following substances and their combinations were tested: 0.2% farnesol; 5% xylitol; 20% xylitol; 0.2% farnesol and 5% xylitol; 0.2% farnesol, 5% xylitol, and ...
Yetkiner Enver - - 2013
Abstract Objective: To test the null hypothesis that combining low-viscosity caries infiltrant with conventional adhesive resins would not improve sealing of sound enamel against demineralization in vitro. Materials and Methods: Bovine enamel discs (N  =  60) with diameter of 3 mm were randomly assigned to six groups (n  =  10). The ...
Herrera Daniel R - - 2013
The aim of this study was to evaluate the influence of different activation protocols for chelating agents used after chemo-mechanical preparation (CMP), for smear layer (SL) removal. Forty-five single-rooted human premolars with straight canals and fully formed apex were selected. The specimens were randomly divided into three groups depending on ...
Zheng Yun-Feng - - 2013
A green and efficient method for large-scale preparation of glycyrrhizic acid from licorice roots was developed by combination of polyamide and macroporous resin. The entire preparation procedure consisted of two simple separation steps. The first step is to use polyamide resin to remove licorice flavoniods from the licorice crude extract. ...
Aykut-Yetkiner A - - 2013
The objective of this in vitro study was to investigate the effects of viscosity changes of different acidic solutions on dental erosion. Bovine enamel samples (n = 240, Ø = 3 mm) were embedded in acrylic resin and were allocated to 30 groups (n = 8). Citric acid (CA) and ...
Rodrigues Marili Villa Nova - - 2013
Hebanthe eriantha (Poir.) Pedersen (Amaranthaceae), which is known as Brazilian ginseng is widely used in folk medicine as an aphrodisiac and antidiabetic tonic. The anti-tumor activity, attributed to the pfaffic acid present in roots of H. eriantha, is responsible for the great interest in the commercialization of this species. In ...
Faller R V - - 2013
To determine the ability of various marketed dentifrices containing stabilized stannous fluoride (SnF2), sodium fluoride (NaF), or sodium monofluorophosphate (SMFP) to protect enamel against the earliest stages of erosive dietary acid damage using an in vitro enamel protection model. Acid-challenged, extracted human teeth were treated with a 1:3 dilution of ...
Memarpour Mahtab - - 2013
The purpose of this in vitro study was to evaluate the microleakage of 3 one-bottle adhesives with different solvents added under the fissure sealant on intact etched enamel. A total of 100 sound mandibular third molars were randomly divided into 5 groups (N=20). Occlusal pits and fissures were sealed with ...
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= ...
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