keyword
MENU ▼
Read by QxMD icon Read
search

fluoride water

keyword
https://www.readbyqxmd.com/read/29165120/high-prevalence-of-dental-fluorosis-among-adolescents-is-a-growing-concern-a-school-based-cross-sectional-study-from-southern-india
#1
Anand Verma, Bharatesh K Shetty, Vasudeva Guddattu, Mehul K Chourasia, Prachi Pundir
BACKGROUND: Fluorosis, caused by ingestion of excessive amount of fluoride through food or water, is a major public health problem in India. This study was undertaken to quantify the dental fluorosis burden among school going adolescents and to find factors associated with dental fluorosis in Kolar taluka, Karnataka, India. METHODS: A total of 1026 high school adolescents (12-17 years) were enrolled from different schools selected by stratified sampling method. Dental examination was done to record Dean's fluorosis index, and socio-demographic, food consumption and oral hygiene data were recorded using a pre-tested structured questionnaire...
April 4, 2017: Environmental Health and Preventive Medicine
https://www.readbyqxmd.com/read/29160802/modification-of-the-selectivity-properties-of-tubular-ceramic-membranes-after-alkaline-treatment
#2
Patrick Dutournié, Lionel Limousy, Jérôme Anquetil, Sébastien Déon
This work focuses on the selectivity modification of ceramic membranes after a mild alkaline treatment. Filtration of pure salt-water solutions was carried out with commercial titania membranes before and after the treatment. After treatment, the rejection of NaF significantly decreased, while the rejection of NaCl and NaBr increased. Additionally, NaI and Na₂SO₄ remained close to zero. Pore size and electrical charge being almost unchanged, only significant modifications in the dielectric effects can explain this modification of selectivity...
November 21, 2017: Membranes
https://www.readbyqxmd.com/read/29160401/fluoride-varnishes-against-dental-erosion-caused-by-soft-drink-combined-with-pediatric-liquid-medicine
#3
Adílis Kalina Alexandria, Ana Maria Gondim Valença, Lúcio Mendes Cabral, Lucianne Cople Maia
The present study evaluated the effect of NaF and CPP-ACP/NaF varnishes to reduce erosion produced by soft drink (SD) combined or not with pediatric liquid medicine. Enamel specimens were pre-treated with fluoride varnish, according to the following groups: NaF varnish (Duraphat®) or CPP-ACP/NaF varnish (MI varnishTM). Two types of erosive cycles were made: by soft drink erosion (SDE) or by pediatric liquid medicine plus soft drink erosion (PLM/SDE). Bovine enamel specimens were randomly assigned in six groups (n=10): G1=NaF + SDE; G2=CPP-ACP/NaF + SDE; G3=Distilled and deionized (DD) water + SDE; G4=NaF + PLM/SDE; G5=CPP-ACP/NaF + PLM/SDE and G6=DD water + PLM/SDE...
July 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29157063/effect-of-dentifrice-containing-ftcp-cpp-acp-and-fluoride-in-the-prevention-of-enamel-demineralization
#4
Suzana Carvalho Teixeira Pinto de Souza, Kaline Cassiano de Araújo, Joseane Ribeiro Barbosa, Viviane Cancio, Anderson Araújo Rocha, Mônica Almeida Tostes
OBJECTIVE: To evaluate the effect of different fluoride- and calcium- and/or phosphate-containing products on their ability to prevent enamel demineralization under pH cycling conditions. MATERIAL AND METHODS: Enamel bovine specimens were assigned to the following groups: G1-MPP (MI Paste Plus, 0.2% NaF, Recaldent™, GC Corporation Tokyo, Japan); G2-FD (Crest™ Cavity Protection, 0.243% NaF, Procter & Gamble, USA); G3-CLP (Clinpro™ 5000, 1.1% NaF, 3M ESPE, USA); and G4-CO (Control without fluoride, Silica-based dentifrice; Daudt Ltda, Brazil)...
November 20, 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/29156417/the-effect-of-magnesium-hydroxide-containing-dentifrice-using-an-extrinsic-and-intrinsic-erosion-cycling-model
#5
Vanara Florêncio Passos, Lidiany Karla Azevedo Rodrigues, Sérgio Lima Santiago
OBJECTIVE: To evaluate, in vitro, the effect of Mg(OH)2 dentifrice, and the influence of the number of experimental days, on the extrinsic (citric acid -CA) and intrinsic (hydrochloric acid -HCl) enamel erosion models. DESIGN: Human enamel slabs were selected according to surface hardness and randomly assigned to 3 groups (n=9) as follows: non-fluoridated (negative control), NaF (1450ppm F- positive control) and Mg(OH)2 (2%) dentifrices. The slabs were daily submitted to a 2-h period of pellicle formation and, over a period of 5days, submitted to cycles (3×/day) of erosive challenge (CA 0...
November 14, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29150809/molecular-properties-of-metal-difluorides-and-their-interactions-with-co2-and-h2o-molecules-a-dft-investigation
#6
Agnes Lincy Arokiyanathan, Senthilkumar Lakshmipathi
A computational study of metal difluorides (MF2; M = Ca to Zn) and their interactions with carbon dioxide and water molecules was performed. The structural parameter values obtained and the results of AIM analysis and energy decomposition analysis indicated that the Ca-F bond is weaker and less ionic than the bonds in the transition metal difluorides. A deformation density plot revealed the stablizing influence of the Jahn-Teller effect in nonlinear MF2 molecules (e.g., where M= Sc, Ti, Cr). An anaysis of the metal K-edge peaks of the difluorides showed that shifts in the edge energy were due to the combined effects of the ionicity, effective nuclear charge, and the spin state of the metal...
November 18, 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/29149065/calcined-chitosan-supported-layered-double-hydroxides-an-efficient-and-recyclable-adsorbent-for-the-removal-of-fluoride-from-an-aqueous-solution
#7
Hanjun Wu, Huali Zhang, Qingxue Yang, Dongsheng Wang, Weijun Zhang, Xiaofang Yang
In this work, calcined chitosan-supported layered double hydroxides (CSLDO) were synthesized through a co-precipitation method that restrained the particles' aggregation of LDHs and exhibited huge specific surface areas, which can enhance the fluoride adsorption capacity. CSLDOs were characterized by physical and chemical methods and used for fluoride adsorption in an aqueous solution. The results indicated that the nanoparticles were constructed first and then assembled to form a porous and layered structure, and chitosan-supported layered double hydroxides (CSLDHs) calcined at 400 °C (CSLDO400) showed the highest specific surface area of 116...
November 17, 2017: Materials
https://www.readbyqxmd.com/read/29136913/direct-detection-of-fluoride-ions-in-aquatic-samples-by-surface-enhanced-raman-scattering
#8
Xueliang Li, Ming Zhang, Yue Wang, Xiaolei Wang, Hao Ma, Peng Li, Wei Song, Xiao Xia Han, Bing Zhao
Given the strong hydration propensity of fluoride ions, it is difficult to detect fluoride, especially inorganic fluoride, in aqueous samples. Resolving the issue of fluoride detection in aqueous samples is a scientific undertaking of great practical significance. Herein, we propose a new method for the sensitive and selective detection of fluoride in aqueous samples without the addition of organic solvents. The method involves surface-enhanced Raman spectroscopy using 1,4-diketo-3,6-diphenylpyrrolo[3,4-c]pyrrole (DPP) compounds and Ag nanoparticles...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136791/a-flow-injection-procedure-using-layered-double-hydroxide-for-on-line-pre-concentration-of-fluoride
#9
Diego P Rocha, Gabriel C Terra, Thaís S Nery, Jairo Tronto, Frederico G Pinto, Sidnei G Silva, Nívia M M Coelho
This work showed a flow system designed with solenoid valves for preconcentration of fluoride using SPADNS method in water samples. The analyte was preconcentrated in a mini-column coated with Layered Double Hydroxides (LDH) used as adsorbent. Then, the fluoride ions were eluted with 0.5molL(-1) sodium hydroxide and determined by spectrophotometry. The variables that affect the system such adsorbent mass, type of eluent, solutions flow rate, reagent concentration and pH effect were critically evaluated. Under optimized conditions, the detection limit, coefficient of variation, linear range and preconcentration factor were estimated at 15µgL(-1) (99...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136625/caries-preventive-effect-of-salt-fluoridation-in-preschool-children-in-the-gambia-a-prospective-controlled-interventional-study
#10
Rainer A Jordan, Andreas Schulte, Alexander C Bockelbrink, Sarah Puetz, Ella Naumova, Lars G Wärn, Stefan Zimmer
The aim of this study was to investigate the anticaries effect of fluoridated salt in a communal feeding program for preschool children. In the Gambian city of Brikama, drinking water had a low fluoride content (0.1 mg F-/L) and young children did not use toothpaste for oral hygiene. Its 2 preschools served as clusters for the trial. Random allocation of the kindergartens was performed by one person not involved in the study, and the clinical examinations were carried out using the envelope method. Meals were prepared with fluoridated salt (250 mg F-/kg salt) in the intervention group but not in the control group...
November 15, 2017: Caries Research
https://www.readbyqxmd.com/read/29134206/azulene-boronate-esters-colorimetric-indicators-for-fluoride-in-drinking-water
#11
Carlos M López-Alled, Adrian Sanchez-Fernandez, Karen J Edler, Adam C Sedgwick, Steven D Bull, Claire L McMullin, Gabriele Kociok-Köhn, Tony D James, Jannis Wenk, Simon E Lewis
Low cost and in situ fluoride detection by non-experts is important for the determination of drinking water safety in developing countries. Colour reagents can provide results quickly without expensive equipment, but colorimetric fluoride indicators are often nonspecific, complex to use or do not work in water. Here we show that azulene-boronate indicators respond selectively to fluoride at concentrations relevant to the WHO limit of 1.5 mg L(-1).
November 14, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29121473/polyvinylidene-fluoride-micropore-membranes-as-solid-phase-extraction-disk-for-preconcentration-of-nanoparticulate-silver-in-environmental-waters
#12
Xiao-Xia Zhou, Yu-Jian Lai, Rui Liu, Sha-Sha Li, Jing-Wen Xu, Jing-Fu Liu
Efficient separation and preconcentration of trace nanoparticulate silver (NAg) from large-volume environmental waters is a prerequisite for reliable analysis and therefore understanding the environmental processes of silver nanoparticles (AgNPs). Herein, we report the novel use of polyvinylidene fluoride (PVDF) filter membrane for disk-based solid phase extraction (SPE) of NAg in 1 L of water samples with the disk-based SPE system, which consists of a syringe pump and a syringe filter holder to embed the filter membrane...
November 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29120634/double-layered-composite-methods-extrapolating-to-complete-basis-set-limit-for-the-systems-involving-more-than-ten-heavy-atoms-application-to-the-reaction-of-heptafluoroisobutyronitrile-with-hydroxyl-radical
#13
Xiaojuan Yu, Hua Hou, Baoshan Wang
Two versions of the double-layered composite methods, including the restricted open-shell model chemistry based on the complete basis set quadratic mode (DL-ROCBS-Q) and the extrapolated CBS limit of electronic energy on the basis of the coupled cluster with single, double, and noniterative triple excitations with the hierarchical sequence of the correlation-consistent basis sets (DL-RCCSD(T)/CBS), were developed to calculate the energetic reaction routes for the systems involving 13/14 heavy atoms with good balance between efficiency and accuracy...
November 16, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29119741/supervised-toothbrushing-programs-in-primary-schools-and-early-childhood-settings-a-scoping-review
#14
V Dickson-Swift, A Kenny, M Gussy, A M de Silva, J Farmer, S Bracksley-O'Grady
OBJECTIVE: In this article we report the findings of a scoping review that aimed to identify and summarise the range of programs and guidelines available for toothbrushing programs in schools and early childhood settings. Dental caries is one of the most common preventable diseases affecting children worldwide. Untreated caries can impact on child health and wellbeing, development, socialisation and school attendance. Supervised toothbrushing programs in schools and other early childhood settings can be effective in improving the oral health of young children...
November 10, 2017: Community Dental Health
https://www.readbyqxmd.com/read/29116298/in-situ-effect-of-titanium-tetrafluoride-varnish-on-enamel-demineralization
#15
Adílis Kalina Alexandria, Camila Nassur, Carolina Bezerra Cavalcanti Nóbrega, Ana Maria Gondim Valença, Pedro Luiz Rosalen, Lucianne Cople Maia
The effect of a 4% titanium tetrafluoride (TiF 4 ) varnish on enamel demineralization was evaluated. Twelve volunteers participated in this double-blind, randomized crossover study. Six enamel specimens were positioned in intraoral appliances throughout four treatment stages: 4% TiF 4 varnish (experimental varnish), 5% sodium fluoride (NaF) varnish (Duraphat ® ), placebo varnish, and negative control (deionized water). After 24 h, the varnishes were removed and plaques were allowed to accumulate. A 20% sucrose solution was dripped onto enamel blocks (10x/day)...
November 6, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/29112819/humidity-and-sunlight-driven-motion-of-a-chemically-bonded-polymer-bilayer-with-programmable-surface-patterns
#16
Lidong Zhang, Xiaxin Qiu, Yihui Yuan, Ting Zhang
We report a bilayer of sodium alginate/polyvinylidene fluoride (SA/PVDF) that is chemically bonded through a series of interfacial coupling reactions. The SA layer is hydrophilic in structure and is capable of strong interaction with water molecules, thus presenting high sensitivity to humidity, whereas the PVDF layer is hydrophobic, inert to humidity. This structural feature results in the bilayer having asymmetric humidity-responsive performances that can thus make its shape change with directionality, which cannot be achieved in an SA single layer...
November 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29111620/readying-community-water-fluoridation-advocates-through-training-surveillance-and-empowerment
#17
C Veschusio, M K Jones, J Mercer, A B Martin
This paper describes the Community Water Fluoridation Advocacy Training Project that was designed to develop networks of community water fluoridation advocates in rural communities. The South Carolina (SC) Department of Health and Environmental Control Division of Oral Health staff and the SC Dental Association were responsible for developing and facilitating the training sessions for key policy influencers, which included medical and dental providers, early childhood educators, and water system operators and managers...
November 10, 2017: Community Dental Health
https://www.readbyqxmd.com/read/29104598/effect-of-proanthocyanidin-fluoride-and-casein-phosphopeptide-amorphous-calcium-phosphate-remineralizing-agents-on-microhardness-of-demineralized-dentin
#18
Zahra Khamverdi, Matin Kordestani, Ali Reza Soltanian
Objectives: The aim of this study was to evaluate the effect of dentin remineralization using proanthocyanidin (PA), fluoride varnish and casein phosphopeptide amorphous calcium phosphate (CPP-ACP) paste and their various combinations on microhardness of demineralized root dentin. Materials and Methods: One-hundred and twenty freshly extracted sound human premolars were selected and randomly divided into eight groups for dentin treatment as follows. C: Deionized water (control); PA: 6...
March 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/29101887/health-risk-assessment-to-fluoride-in-drinking-water-of-rural-residents-living-in-the-poldasht-city-northwest-of-iran
#19
Mahmood Yousefi, Mahboobeh Ghoochani, Amir Hossein Mahvi
This study analyzes the concentrations and health risks of fluoride in 112 drinking water samples collected from 28 villages of the Poldasht city, West Azerbaijan province in Iran. Results indicated that fluoride content in drinking water ranged from0.27 to 10.3mgL(-1) (average 1.70mgL(-1)). The 57% of samples analyzed exceeded the limit set for fluoride in drinking water. Based on findings from health risk assessment this study, the highest fluoride exposure for different regions of Poldasht city was observed in young consumers, children and teenager's groups...
November 1, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29098240/-effects-of-fluoride-on-expression-of-survivin-during-rats-dental-germ-development
#20
Cui-Cui Zhong, Jian-Gang Tian, Rui-Zhe Huang
PURPOSE: This study was to investigate the expression of survivin in dental germ development of SD rats with fluorosis, and explore the effects of fluoride on survivin expression and the pathogenic mechanism of dental fluorosis. METHODS: Forty-five SD rats (pregnant for 10 days) were randomly divided into control group, experimental group 1 and group 2. Drinking water with fluoride concentration of 0, 50, 150 mg/L was provided for rats accordingly. The samples were collected at E18...
June 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
keyword
keyword
30078
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"