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https://www.readbyqxmd.com/read/27908407/effects-of-fluoride-on-insulin-signaling-and-bone-metabolism-in-ovariectomized-rats
#1
Amanda Gomes Pereira, Fernando Yamamoto Chiba, Maria Sara de Lima Coutinho Mattera, Renato Felipe Pereira, Rita de Cássia Alves Nunes, Thaís Verônica Saori Tsosura, Roberta Okamoto, Doris Hissako Sumida
Fluoride is an essential trace element for the maintenance of bone health owing to its capacity to stimulate proliferation and osteoblastic activity that can lead to increased bone formation. However, excessive sodium fluoride (NaF) intake can impair carbohydrate metabolism thereby promoting hyperglycemia, insulin resistance, and changes in insulin signaling. Thus, this study aimed to evaluate the effect of chronic treatment with NaF in bone metabolism, insulin signaling, and plasma concentrations of glucose, insulin, tumor necrosis factor-α (TNF-α), osteocalcin (OCN), and fluoride in ovariectomized rats...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27908404/fluoride-affects-bone-repair-differently-in-mice-models-with-distinct-bone-densities
#2
Paula Kennerly Herrera, Andressa Pelissari Zambolin, Mileni da Silva Fernandes, Tânia Mary Cestari, Flávia Godoy Iano, Willian Fernando Zambuzzi, Marília Afonso Rabelo Buzalaf, Rodrigo Cardoso de Oliveira
We grouped mice [strains: C57BL/6J (n=32) and C3H/HeJ (n=32)] to address the influence of bone density on fluoride's (F's) biological effects. These animals received low-fluoride food and water containing 0 (control group) or 50ppm of F for up to 28days. The upper left central incisor was extracted, and the left maxilla was collected at 7, 14, 21, and 28days for histological and histomorphometric analysis to estimate bone neoformation. Our results showed bone neoformation in all of the evaluated groups, with the presence of bone islets invading the center of the alveoli when replacing the existing connective tissue...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27908076/experimental-observation-of-piezoelectric-effect-in-cancellous-bone-generated-by-ultrasound-irradiation
#3
A Hosokawa
In this study, piezoelectric cells (PE-cells) of cancellous bone were experimentally produced to receive an ultrasound wave. In the PE-cell, a bovine cancellous bone specimen, in which the pore spaces were saturated with air, was electrically shielded to prevent electromagnetic noise. As a result, the piezoelectric signal generated in the cancellous bone specimen by irradiating an ultrasound burst wave at 1.0 MHz could be clearly observed in water. The experimental results showed that the ultrasound sensitivity per unit area of cancellous bone was estimated to be below 1/100 and 1/100 000 of cortical bone and poly(vinylidene fluoride), respectively...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27907822/a-comparison-study-the-different-impacts-of-sodium-hypochlorite-on-pvdf-and-psf-ultrafiltration-uf-membranes
#4
Yang Zhang, Jie Wang, Fei Gao, Yongsheng Chen, Hongwei Zhang
Chemical ageing of ultrafiltration membranes related to drinking water operation is not a new problem, but literature documenting sieving properties and fouling behaviors of aged membranes are scarce. This paper shows how the surface chemistry evolution of polysulfone (PSF) and polyvinylidene fluoride (PVDF) membranes can lead to the formation of distinct membrane properties when exposed to sodium hypochlorite solutions. The surface physicochemical evolutions of aged membranes are characterized based on chemical composition (ATR-FTIR and XPS), water contact angle analysis, and surface zeta potential test...
November 7, 2016: Water Research
https://www.readbyqxmd.com/read/27876966/evaluation-of-sodium-fluoride-toxicity-in-schistosoma-infected-snails-assessment-of-antioxidants-antiapoptotic-hypoprotein-and-hypocholesterol-activities
#5
Khaled M M Koriem, Radziyah B Shamsuri, Asliza M Ubaidillah
The snails' tissues represents an intermediate or secondary host for Schistosoma sporocysts where, germ cells within the secondary sporocyst begin to divide to produce thousands of cercariae capable of infecting humans. The aim of the study was to evaluate the toxicity of sodium fluoride in Schistosoma snails' tissue homogenates. A total number of 264 different Schistosoma snails were collected from eight drainage water resources and divided into control uninfected and infected snails; where infected snails divided into four group; the first group without any treatment while second, third and fourth groups immersed in 25, 50 and 100 mg sodium fluoride/L during the period of 4 weeks then the snails' hemolymph and tissue homogenates were prepared to evaluate the snail' tissue antioxidants, protein content, lipid profile and apoptosis...
December 2016: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/27876586/fluoride-supplementation-adherence-and-barriers-in-a-community-without-water-fluoridation
#6
Shannon Flood, Karin Asplund, Benjamin Hoffman, Allison Nye, Katharine Zuckerman
BACKGROUND: To prevent early childhood caries, the American Dental Association recommends oral fluoride supplementation for children in communities lacking water fluoridation who are at high caries risk. However, patient adherence to oral fluoride supplementation has not been studied in this population. This study assessed adherence to oral fluoride and barriers to adherence in a community lacking water fluoridation. METHODS: A self-administered survey was completed in a systematic sample of 209 parents of children ages 6 months to 4 years, during a primary care visit in an urban academic medical center...
November 19, 2016: Academic Pediatrics
https://www.readbyqxmd.com/read/27874277/graphite-lini0-5mn1-5o4-cells-based-on-environmentally-friendly-in-water-made-electrodes
#7
Francesca De Giorgio, Nina Laszczynski, Jan von Zamory, Marina Mastragostino, Catia Arbizzani, Stefano Passerini
The performance of graphite//LiNi0.5Mn1.5O4 (LNMO) cells whose both electrodes are made using water-soluble sodium carboxymethyl cellulose (CMC) binder is reported for the first time. The full cell performed outstandingly at 400 cycles in the conventional electrolyte ethylene carbonate: dimethyl carbonate - 1M LiPF6 and the delivered specific energy at the 100th, 200th, 300th and 400th cycle corresponded to 82%, 78%, 73% and 66% of the initial energy value of 259 Wh kg-1 referred to the sum of the two electrode composite weights...
November 22, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27872551/evaluation-of-fluoride-levels-in-bottled-water-and-their-contribution-to-health-and-teeth-problems-in-the-united-arab-emirates
#8
Mohamed Yehia Z Abouleish
Fluoride is needed for better health, yet if ingested at higher levels it may lead to health problems. Fluoride can be obtained from different sources, with drinking water being a major contributor. In the United Arab Emirates (UAE), bottled water is the major source for drinking. The aim of this research is to measure fluoride levels in different bottled water brands sold in UAE, to determine whether fluoride contributes to better health or health problems. The results were compared to international and local standards...
October 2016: Saudi Dental Journal
https://www.readbyqxmd.com/read/27870965/a-biocompatible-and-novelly-defined-al-hap-adsorption-membrane-for-highly-effective-removal-of-fluoride-from-drinking-water
#9
Junyong He, Kai Chen, Xingguo Cai, Yulian Li, Chengming Wang, Kaisheng Zhang, Zhen Jin, Fanli Meng, Xuguang Wang, Lingtao Kong, Jinhuai Liu
A biocompatible and novelly-defined adsorption membrane for rapid removal of fluoride was prepared. Both adsorption and membrane techniques were used in this research. Al(OH)3 nanoparticles modified hydroxyapatite (Al-HAP) nanowires were developed and made into Al-HAP membrane. The adsorption data of Al-HAP adsorbent could be well described by Freundlich isotherm model while the adsorption kinetic followed pseudo-second-order model. The maximum of adsorption capacity was 93.84mg/g when the fluoride concentration was 200mg/L...
November 3, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27869711/preparation-and-characterization-of-hydrophilically-modified-pvdf-membranes-by-a-novel-nonsolvent-thermally-induced-phase-separation-method
#10
Ningen Hu, Tonghu Xiao, Xinhai Cai, Lining Ding, Yuhua Fu, Xing Yang
In this study, a nonsolvent thermally-induced phase separation (NTIPS) method was first proposed to fabricate hydrophilically-modified poly(vinylidene fluoride) (PVDF) membranes to overcome the drawbacks of conventional thermally-induced phase separation (TIPS) and nonsolvent-induced phase separation (NIPS) methods. Hydrophilically-modified PVDF membranes were successfully prepared by blending in hydrophilic polymer polyvinyl alcohol (PVA) at 140 °C. A series of PVDF/PVA blend membranes was prepared at different total polymer concentrations and blend ratios...
November 18, 2016: Membranes
https://www.readbyqxmd.com/read/27862756/metal-fluorides-as-analogs-for-studies-on-phosphoryl-transfer-enzymes
#11
George Michael Blackburn, Yi Jin, Nigel G Richards, Jonathan P Waltho
The 1994 structure of a transition state analog with AlF4- and GDP complexed to G1, a small G protein, heralded a new field of research into structure and mechanism of enzymes that manipulate transfer of the phosphoryl (PO3-) group. The list of enzyme structures that embrace metal fluorides, MFx, as ligands that imitate either the phosphoryl group or a phosphate, is now growing at over 80 per triennium. They fall into three distinct geometrical classes: (i) Tetrahedral complexes, based on BeF3-, mimic ground state phosphates; (ii) Octahedral complexes, primarily based on AlF4-, mimic "in-line" anionic transition state for phosphoryl transfer; and (iii) Trigonal bipyramidal complexes, represented by MgF3- and putative AlF30 moieties, additionally mimic the tbp geometry of the transition state...
November 8, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27855844/fluoridation-may-not-be-linked-with-adverse-health-outcomes
#12
Karen Blakey, Richard J Q McNally
ARTICLE TITLE AND BIBLIOGRAPHIC INFORMATION: Community water fluoridation and health outcomes in England: a cross-sectional study. Young N, Newton J, Morris J, Morris J, Langford J, Iloya J, Edwards D, Makhani S, Verne J. Community Dent Oral Epidemiol 2015; 43:550-9. SOURCE OF FUNDING: Public Health England TYPE OF STUDY/DESIGN: Ecological (area based).
September 2016: Journal of Evidence-based Dental Practice
https://www.readbyqxmd.com/read/27854046/fluoride-exposure-aggravates-the-testicular-damage-and-sperm-quality-in-diabetic-mice-protective-role-of-ginseng-and-banaba
#13
Saumya Sm, P Mahaboob Basha
Fluoride toxicity is known to pose infertility in fluoride-intoxicated animals as well as in people residing in fluoride endemic zones. The present study addresses the degree of impairments caused due to co-exposure of high fluoride toxicity in diabetic mice. Swiss mice, Mus musculus, were subjected to fluoride toxicity by providing fluoride-supplemented drinking water (600 ppm NaF) for a period of 30 days after the confirmation of streptozotocin-induced diabetes(STZ, 50 mg/kgbw). Consequently, aggravated hyperglycemia and tissue fluoride accumulation were witnessed in fluoride-intoxicated diabetic mice; later, these toxicated mice were treated with ginseng extract (GE) and banaba leaf extract, (BLE) at dose of 150 mg/kgbw/day alone and in combination for 15 and 30-day duration to check the efficacy of phytoextracts in reversing the toxicity...
November 16, 2016: Biological Trace Element Research
https://www.readbyqxmd.com/read/27853967/the-bioconcentration-ability-of-heavy-metal-research-for-50-kinds-of-rice-under-the-same-test-conditions
#14
Wen-Juan Xie, Lei Che, Guang-Yu Zhou, Li-Na Yang, Min-Yu Hu
The aims of this experiment are to explore the accumulation of metal contamination of different varieties of rice planted in paddy fields and to provide a basis for the further research. The rice specimens were grown in and collected from a total area of 8.24 acres of rice planting fields where local farmers cultivated 50 different kinds of rice. The crops were grown using the methods of seedling, transplanting, fertilizing, and irrigation, under the guidance of professional and technical personnel. The 50 kinds of paddy rice contain 20 kinds of conventional rice, 15 kinds of two-line hybrid rice, 15 kinds of three-line hybrid rice, and the whole experiment lasted 100 days...
December 2016: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27843259/prevalence-of-dental-fluorosis-and-associated-risk-factors-in-bagalkot-district-karnataka-india
#15
Taranatha Mahantesha, Uma B Dixit, Ramesh P Nayakar, Devasya Ashwin, Naveen K Ramagoni, Vijaya P Kamavaram Ellore
INTRODUCTION: An earlier epidemiological study by these authors revealed fluorosis at very low levels of fluoride concentrations in drinking water. AIM: The objective of present study was to investigate risk factors of dental fluorosis in permanent teeth in the villages of northern Karnataka, India. MATERIALS AND METHODS: The present survey was carried out in three villages of Hungund Taluk, Bagalkot District, Karnataka, India, with the fluoride concentration of 0...
July 2016: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/27836268/fluoride-enrichment-in-an-alluvial-aquifer-with-its-subsequent-effect-on-human-health-in-birbhum-district-west-bengal-india
#16
D Mondal, S Gupta, D V Reddy, G Dutta
This research work primarily deals with the geochemistry and genesis of fluoride (F(-)) in an alluvial aquifer with an emphasis on prevalence of dental and skeletal fluorosis among the endemic population. Hydrogeochemical outcomes reveal that chemical weathering and ion-exchange phenomena are the two dominant processes that make study area groundwater into NaHCO3 water type. Presence of intercalated zeolite rich sediments (FTotal 412-446 mg/kg) having higher ion-exchange capacity (120-125 meq/100 g) within the aquifer is the source and mobilizing factors of F(-) in groundwater respectively...
November 8, 2016: Chemosphere
https://www.readbyqxmd.com/read/27829419/does-fluoride-influence-oviposition-of-anopheles-stephensi-in-stored-water-habitats-in-an-urban-setting
#17
Shalu Thomas, Sangamithra Ravishankaran, N A Johnson Amala Justin, Aswin Asokan, T Maria Jusler Kalsingh, Manu Thomas Mathai, Neena Valecha, Alex Eapen
BACKGROUND: The physico-chemical characteristics of lentic aquatic habitats greatly influence mosquito species in selecting suitable oviposition sites; immature development, pupation and adult emergence, therefore are considerations for their preferred ecological niche. Correlating water quality parameters with mosquito breeding, as well as immature vector density, are useful for vector control operations in identifying and targeting potential breeding habitats. METHODS: A total of 40 known habitats of Anopheles stephensi, randomly selected based on a vector survey in parallel, were inspected for the physical and chemical nature of the aquatic environment...
November 9, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27824182/a-gadolinium-iii-complex-based-dual-modal-probe-for-mri-and-fluorescence-sensing-of-fluoride-ions-in-aqueous-medium-and-in-vivo
#18
Yue Wang, Renfeng Song, Ke Guo, Qingtao Meng, Run Zhang, Xiangfeng Kong, Zhiqiang Zhang
A novel Gd(iii) complex, Gd(TTA)3-DPPZ, was designed and assembled as a dual-modal probe for the simultaneous fluorescence and magnetic resonance imaging (MRI) detection of fluoride ions in aqueous media and in vivo. In this system, the Gd(iii) center is not only serving as a MRI signal output unit, but also as a binding site for fluoride ions. When appropriate equivalents of fluoride ions were added into the solution of Gd(TTA)3-DPPZ, the replacement of the coordination water led to a decrease of the longitudinal relaxivity (r1) as well as distinct spectroscopic changes, by which MRI/fluorescence dual-modal fluoride ion sensing was achieved...
November 8, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27822359/dental-reform-in-israel-s-national-health-insurance-law-has-helped-children-and-their-families-but-what-s-next
#19
EDITORIAL
Carlos Quiñonez
Through a nationally-representative survey of 6 year-old children, Natapov, Sasson and Zusman demonstrate that the 2010 dental reform to the National Health Insurance Law (NHIL) has helped to improve the oral health of children in Israel. While the prevalence of dental caries (tooth decay) in Israel's children has remained relatively stable over time, compared to previous surveys, children now have more treated than untreated disease, suggesting that the NHIL reform has increased utilization and access to dental care, and arguably improved the quality of life of children and their families...
2016: Israel Journal of Health Policy Research
https://www.readbyqxmd.com/read/27821097/the-differences-in-healthcare-utilization-for-dental-caries-based-on-the-implementation-of-water-fluoridation-in-south-korea
#20
Myung-Soo Cho, Kyu-Tae Han, Sohee Park, Ki Tae Moon, Eun-Cheol Park
BACKGROUND: There were some debates about the water fluoridation program in South Korea, even if the program had generally substantial effectiveness. Because the out-of-pocket expenditures for dental care were higher in South Korea than in other countries, an efficient solution was needed. Therefore, we examined the relationship between the implementation of water fluoridation and the utilization of dental care. METHODS: We used the National Health Insurance Service National Sample Cohort...
November 8, 2016: BMC Oral Health
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