keyword
MENU ▼
Read by QxMD icon Read
search

fluoride water

keyword
https://www.readbyqxmd.com/read/28441602/fluoride-and-iodine-enrichment-in-groundwater-of-north-china-plain-evidences-from-speciation-analysis-and-geochemical-modeling
#1
Junxia Li, Hailing Zhou, Kun Qian, Xianjun Xie, Xiaobin Xue, Yijun Yang, Yanxin Wang
To better understand the enrichment of fluoride and iodine in groundwater at North China Plain (NCP), speciation analysis and geochemical modeling were conducted to identify the key hydrochemical processes controlling their mobilization in groundwater system. Groundwater fluoride and iodine concentrations ranged from 0.18 to 5.59mg/L and from 1.51 to 1106μg/L, respectively, and approximately 63% and 32.3% of groundwater fluoride and iodine were higher than the guidelines for drinking water (1.5mg/L and 150μg/L)...
April 22, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28441035/arsenic-and-fluoride-removal-by-potato-peel-and-rice-husk-pprh-ash-in-aqueous-environments
#2
Sadia Bibi, Abida Farooqi, Azra Yasmeen, Muhammad Aqeel Kamran, Nabeel Khan Niazi
Finding appropriate adsorbent may improve the quality of drinking water in those regions where arsenic (As) and fluoride (F(-)) are present in geological formations. In this study, we evaluated the efficiency of potato peel and rice husk ash (PPRH-ash) derived adsorbent for the removal of arsenic and fluoride from contaminated water. Evaluation was done in batch adsorption experiments and the effect of pH, initial adsorbate concentration, contact time and adsorbent dose were studied. The characterization of adsorbents were done using scanning electron micropcope (SEM) and Fourier transform infrared (FTIR) spectroscopy...
April 25, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28435191/occurrence-of-multidrug-resistant-escherichia-coli-in-groundwater-of-brij-region-uttar-pradesh-and-its-public-health-implications
#3
Barkha Sharma, Parul, A K Verma, Udit Jain, Janaradan K Yadav, Ravneet Singh, Raghvendra Mishra
AIM: The study evaluates the microbial as well as physicochemical pollution of groundwater of Brij region of Uttar Pradesh, a major tourist destination in the country along with estimating the drug resistance evident in the isolated Escherichia coli. MATERIALS AND METHODS: A total of 60 samples of groundwater were collected from six different sites and assessed for physicochemical (pH, color, taste, turbidity, total dissolved solids [TDS], total hardness [TH], chlorides, fluorides, nitrates, and iron) and microbiological parameters (standard plate count [SPC], most probable number test [MPN], E...
March 2017: Veterinary World
https://www.readbyqxmd.com/read/28432821/addition-of-hydrogen-peroxide-to-groundwater-with-natural-iron-induces-water-disinfection-by-photo-fenton-at-circumneutral-ph-and-other-photochemical-events
#4
Héctor Mario Gutiérrez-Zapata, John Jairo Alvear-Daza, Julián Andrés Rengifo-Herrera, Janeth Sanabria
Samples of natural groundwater (with low turbidity, neutral pH and 0.3 mg L(-1) iron concentration) inoculated with Escherichia coli K-12, were exposed to simulated solar light both in the presence and absence 10 mg L(-1) of H2 O2. Results demonstrated that the viability of E. coli (by DVC-FISH) was grounded to zero after 360 min of irradiation. This abatement could be caused by the oxidative stress induced by •OH radicals or another photo-induced reactive oxygen species. Two 2(3) factorial experimental designs enabled the evaluation of the effects of chemical factors on the inactivation of E...
April 22, 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/28432311/enteric-innervation-combined-with-proteomics-for-the-evaluation-of-the-effects-of-chronic-fluoride-exposure-on-the-duodenum-of-rats
#5
Carina Guimarães de Souza Melo, Juliana Vanessa Colombo Martins Perles, Jacqueline Nelisis Zanoni, Sara Raquel Garcia de Souza, Erika Xavier Santos, Aline de Lima Leite, Alessandro Domingues Heubel, Camila Oliveira E Souza, Juliana Gadelha de Souza, Marília Afonso Rabelo Buzalaf
Ingested fluoride (F) is absorbed mainly in the small intestine, which is controlled by the Enteric Nervous System (ENS). Although important intestinal symptomatology has been described after excessive F exposure, there have been no studies reporting the effects of F on the ENS. In this study, the effects of chronic F exposure were evaluated on the duodenums of rats through proteomic and morphological analyses. Concentrations of 0, 10, or 50 ppm of F were applied to the drinking water for 30 days. Immunofluorescence techniques were performed in the myenteric plexus of the duodenum to detect HuC/D, neuronal nitric oxide (nNOS), vasoactive intestinal peptide (VIP), calcitonin gene related peptide (CGRP), and substance P (SP)...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28428600/water-fluoridation-there-is-no-evidence
#6
J F Beal, M Lennon
No abstract text is available yet for this article.
April 21, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28427668/synthesis-of-hydroxyapatite-nanorods-for-application-in-water-defluoridation-and-optimization-of-process-variables-advantage-of-ultrasonication-with-precipitation-method-over-conventional-method
#7
Dhiraj Mehta, Poonam Mondal, Virendra Kumar Saharan, Suja George
This research work presents the synthesis of hydroxyapatite (Hap) nanorods for defluoridation of drinking water by using both conventional (CM) and ultrasonication with precipitation (USPM) methods. Calcium nitrate was reacted with potassium phosphate in presence of ammonia for controlled pH to synthesize Hap nanorods, which was characterized using FTIR, XRD, SEM, TG-DTA, and TEM/EDS for determining its phase composition, structural and thermal decomposition behavior. When USPM method was used for synthesis, the yield of the Hap nanorods was improved from 83...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28415039/removal-of-fluoride-sds-ammonia-and-turbidity-from-semiconductor-wastewater-by-combined-electrocoagulation-electroflotation
#8
S Aoudj, A Khelifa, N Drouiche
Semiconductor industry effluents contain organic and inorganic pollutants, such as sodium dodecyl sulfate (SDS), fluoride and ammonia, at high levels which consists a major environmental issue. A combined EC-EF process is proposed as a post-treatment after precipitation for simultaneous clarification and removal of pollutants. In EC step, a hybrid Fe-Al was used as the soluble anode in order to avoid supplementary EC step. EC-Fe is more suitable for SDS removal; EC-Al is more suitable for fluoride removal, while EC with hybrid Al-Fe makes a good compromise...
April 14, 2017: Chemosphere
https://www.readbyqxmd.com/read/28413590/effect-of-nano-hydroxyapatite-toothpaste-on-microhardness-ofartificial-carious-lesions-created-on-extracted-teeth
#9
Asghar Ebadifar, Mohammad Nomani, Sayed Ali Fatemi
Background. Many types of toothpastes contain substances that can remineralize initial enamel caries. This study aimed to assess the effect of nano-hydroxyapatite (NHA) on microhardness of artificially created carious lesions. Methods. In this in vitro study, NHA was prepared using sol-gel technique and added to the toothpaste with 7% concentration. A total of 80 extracted sound teeth were collected. The crowns were polished using 500-grit abrasive paper. The specimens were randomly coded from 1 to 80. Number 1 to 40 were assigned to group A and numbers 41 to 80 to group B...
2017: Journal of Dental Research, Dental Clinics, Dental Prospects
https://www.readbyqxmd.com/read/28412627/exploratory-factor-analysis-of-fluoride-removal-efficiency-associated-with-the-chemical-properties-of-geomaterials
#10
Eun-Ah Kim, Ji Hye Park, Sung-Hee Han, You Young Lim, Ki Jeong Kong, Jung Yun Do
This study explored the chemical properties of geomaterials in relation with their fluoride removal efficiencies from water under acidic conditions. Two types each of as-received and engineered steel slags were tested, and their F(-) removal efficiencies were compared with those of other common or commercially available acid spill response materials. The chemical properties of the geomaterials were analyzed by x-ray photoelectron spectroscopy to determine their surface elemental compositions and by Brunauer-Emmett-Teller analysis to determine their surface areas...
March 28, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28412584/the-effects-of-salt-concentration-and-foulant-surface-charge-on-hydrocarbon-fouling-of-a-poly-vinylidene-fluoride-microfiltration-membrane
#11
Zhengwang He, Sirirat Kasemset, Alon Y Kirschner, Yu-Heng Cheng, Donald R Paul, Benny D Freeman
The effects of inorganic salts and organic hydrocarbons on membrane fouling are often investigated independently. However, in many cases, these foulants are commonly found together, and such mixtures are rarely the subject of fouling studies. In this study, crude oil-in-water emulsions were formulated at three different added NaCl concentrations, 0, 10(-3) and 10(-1) M. Surface properties, such as surface tension and surface charge, of these emulsions and a poly(vinylidene fluoride) (PVDF) microfiltration (MF) membrane were characterized...
March 30, 2017: Water Research
https://www.readbyqxmd.com/read/28411405/biomarkers-of-chronic-fluoride-exposure-in-groundwater-in-a-highly-exposed-population
#12
Tewodros Rango, Avner Vengosh, Marc Jeuland, Gary M Whitford, Redda Tekle-Haimanot
This study examined the relation between fluoride (F(-)) concentrations in fingernail clippings and urine and the prevalence and severity of enamel fluorosis (EF) among Ethiopian Rift Valley populations exposed to high levels of F(-) in drinking water. The utility of fingernail clippings as a biomarker for F(-) exposure and EF was also assessed for the first time in a high-F(-) region. The study recorded the EF status of 386 individuals (10 to 50years old), who consume naturally contaminated groundwater with widely varying F(-) concentration (0...
April 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28404475/exploring-the-short-term-impact-of-community-water-fluoridation-cessation-on-children-s-dental-caries-a-natural-experiment-in-alberta-canada
#13
L McLaren, S Patterson, S Thawer, P Faris, D McNeil, M L Potestio, L Shwart
OBJECTIVES: Dental caries (tooth decay) is common and can be serious. Dental caries is preventable, and community water fluoridation is one means of prevention. There is limited current research on the implications of fluoridation cessation for children's dental caries. Our objective was to explore the short-term impact of community water fluoridation cessation on children's dental caries, by examining change in caries experience in population-based samples of schoolchildren in two Canadian cities, one that discontinued community water fluoridation and one that retained it...
February 7, 2017: Public Health
https://www.readbyqxmd.com/read/28402899/detection-of-cyanide-ions-in-aqueous-solutions-using-cost-effective-colorimetric-sensor
#14
P Madhusudhana Reddy, Shih-Rong Hsieh, Chi-Jung Chang, Jing-Yuan Kang
Cyanide (CN̄) is one of the most toxic material to the human and environment. It is very important to develop the diagnostic tools for the detection of CN̄ ions. Moreover, detection of the ions in an aqueous medium is a challenging task as water molecules interfere with the sensing mechanism. In this context, we prepared chemical sensor, S1, having anthraquinone as a signaling unit and thiourea as a binding site. This sensor exhibited distinct visual color and spectral changes in response to CN̄ ion over other testing anions in 50% aq...
April 3, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28399864/predictors-of-dental-visits-among-primary-school-children-in-the-rural-australian-community-of-lithgow
#15
James Rufus John, Haider Mannan, Subrat Nargundkar, Mario D'Souza, Loc Giang Do, Amit Arora
BACKGROUND: Regular dental attendance is significant in maintaining and improving children's oral health and well-being. This study aims to determine the factors that predict and influence dental visits in primary school children residing in the rural community of Lithgow, New South Wales (NSW), Australia. METHODS: All six primary schools of Lithgow were approached to participate in a cross-sectional survey prior to implementing water fluoridation in 2014. Children aged 6-13 years (n = 667) were clinically examined for their oral health status and parents were requested to complete a questionnaire on fluoride history, diet, last dental visit, and socio-demographic characteristics...
April 11, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28390489/highly-selective-turn-on-fluorescent-sensing-of-fluoride-ion-based-on-a-conjugated-polymer-thin-film-fe-3-complex
#16
Wanchuan Ding, Jingkun Xu, Yangping Wen, Jie Zhang, Hongtao Liu, Zhouxiang Zhang
We designed a new fluorescent conjugated polymer thin film sensor via direct electropolymerization of the corresponding electroactive monomer M onto the surface of ITO electrode, and the thin film-Fe(3+) complex was used for the highly-selective detection of fluoride ion (F(-)) in water environmental samples. The as-obtained thin film could effectively detect Fe(3+) as a selective turn-off fluorescent sensor, and exhibited outstanding reversibility. This film in the presence of Fe(3+) showed a highly selective turn-on response toward F(-) over other anions with a 5-fold enhancement in the fluorescence intensity...
May 15, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28390462/does-the-texas-first-dental-home-program-improve-parental-oral-care-knowledge-and-practices
#17
Charmaine L Thompson, Ann L McCann, Emet D Schneiderman
PURPOSE: This study evaluated the effectiveness of the Texas Medicaid First Dental Home (FDH) by comparing the oral health knowledge, practices, and opinions of participating vs. non-participating parents. METHODS: A 29-question survey (English & Spanish) was developed and administered to 165 parents of children under three years old (FDH=49, Non-FDH=116) who visited qualifying Medicaid clinics in Texas. RESULTS: Mann Whitney U tests showed that FDH parents scored higher on overall knowledge (P=0...
March 15, 2017: Pediatric Dentistry
https://www.readbyqxmd.com/read/28390327/ingestion-of-dug-well-water-from-an-area-with-high-prevalence-of-chronic-kidney-disease-of-unknown-etiology-ckdu-and-development-of-kidney-and-liver-lesions-in-rats
#18
M G Thammitiyagodage, M M Gunatillaka, N Ekanayaka, C Rathnayake, N U Horadagoda, R Jayathissa, U K Gunaratne, W G Kumara, P Abeynayake
Introduction: Chronic kidney disease of unknown aetiology (CKDu) is prevalent in the North Central Province (NCP) of Sri Lanka and ingestion of dug well water is considered a potential causative factor. Three CKDu prevalent villages were selected from the NCP based on the number of CKDu patients in the locality. Methods: Forty Wistar rats were divided into four groups with 10 rats each. Group No 1, 2 and 3 were given water from selected dug wells. Control group was given tap water from Colombo...
March 31, 2017: Ceylon Medical Journal
https://www.readbyqxmd.com/read/28390313/accumulation-and-interaction-of-fluoride-and-cadmium-in-the-soil-wheat-plant-system-from-the-wastewater-irrigated-soil-of-an-oasis-region-in-northwest-china
#19
Yepu Li, Shengli Wang, Daniel Prete, Suyin Xue, Zhongren Nan, Fei Zang, Qian Zhang
Contamination of agricultural soil with high concentrations of fluorine (F) and cadmium (Cd) have raised significant concerns regarding their impacts on human health but the relationship between F and Cd in soil-wheat plant system in an oasis region has not been investigated. This paper aims to study the accumulation and interaction of F and total Cd in the soil-wheat plant system while considering the potential risks of F and Cd to human health. Soil samples were collected from wastewater-irrigated oasis regions, Dongdagou and Xidagou...
April 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28387775/synchrotron-ftir-mapping-of-mineralization-in-a-microfluidic-device
#20
Shunbo Li, Johannes Ihli, William J Marchant, Muling Zeng, Li Chen, Katia Wehbe, Gianfelice Cinque, Oscar Cespedes, Nik Kapur, Fiona C Meldrum
Fourier transform infrared micro-spectroscopy provides an effective means of performing rapid, non-destructive, and label-free analysis of specimens according to their vibrational modes. However, as water absorbs very strongly in the infrared region, analysis of aqueous solutions in transmission mode can suffer from problems with signal saturation. We here describe the fabrication of a novel microfluidic device that overcomes this problem. Devices with channel depths of just 3 μm were constructed from calcium fluoride using photolithography and hot embossing bonding, where calcium fluoride was selected due to its transparency in the IR region...
April 7, 2017: Lab on a Chip
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"