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Sanigdha Acharya, S K Sharma, Vinita Khandegar
In the present study, hydro-geochemical characteristics of groundwater samples collected from South West Delhi, India, have been assessed. 50 sampling locations were recorded with the help of global positioning system, to assess the groundwater quality and evaluate the corrosion and scaling potential. Hydro-geochemical characterization for different parameters such as pH, temperature (T), electrical conductivity (EC), total dissolved solids (TDS), salinity (SA), total hardness (TH), total alkalinity ( <mml:math xmlns:mml="http://www...
June 2018: Data in Brief
Susan Nierenberg, Linda Paine Hughes, Molli Warunek, Joseph E Gambacorta, Suzanne S Dickerson, Nancy Campbell-Heider
Nowhere is the discrepancy between good and poor oral health status more pronounced in the U.S. than in the Appalachian region, where there is a high incidence of dental problems related to non-flouridated water, limited access to care, and tooth loss. To address these disparities, in 2016 University at Buffalo dental and nurse practitioner faculty members led a group of dental and nursing students on a two-day service-learning experience in rural Tennessee. The aim of this study was to assess the dental and nursing students' reflections on this interprofessional service-learning experience in Appalachia...
May 2018: Journal of Dental Education
David C Bock, Amy C Marschilok, Kenneth J Takeuchi, Esther S Takeuchi
Magnetite is a conversion anode material displaying multi-electron transfer during lithiation and delithiation. The solid electrolyte interphase (SEI) on magnetite, Fe3 O4 , electrodes for lithium ion batteries was deliberately modified through the use of fluoroethylene carbonate (FEC) electrolyte additive, improving both capacity retention and rate capability. Analysis showed reduction of FEC at higher voltage compared to non-fluorinated solvents with formation of a modified lithium flouride containing electrode surface...
December 7, 2017: Chemical Communications: Chem Comm
Narges Johari, Hamid Reza Madaah Hosseini, Ali Samadikuchaksaraei
It is known that Fluoride ions strongly affect bone mineralization and formation. In the present study, the engineered bone tissue scaffolds are fabricated using silk fibroin (SF) and flouridated TiO2 nanoparticles. TiO2 nanoparticles are modified by fluoride ions, and different levels (0, 5, 10, 15 and 20wt%) of the fluoridated TiO2 nanoparticles (TiO2 -F) were subsequently added to the SF matrix through phase separation method to prepare silk fibroin/flouridated TiO2 nanocomposite scaffolds (SF/TiO2 -F). Phase structure, functional groups, morphology and mechanical properties of the obtained scaffolds were evaluated by X-ray diffraction method (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and compressive testing, respectively...
January 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
Archana Singh, Darshak R Trivedi
A colorimetric receptor R 2-[(2-Hydroxy-naphthalen-1-ylmethylene)-hydrazonomethyl]-quinolin-8-ol has been designed and synthesized with good yield and characterized by the standard spectroscopic techniques such as FT-IR, UV-Visible,1 H NMR,13 C NMR and ESI-MS. The receptor R showed naked-eye detection and spectral change in the presence of F- , AcO- and H2 PO4 - over other anions. Interestingly, receptor R displaying high selective recognition towards F- , AcO- ion with a drastic color change from pale yellow to red in dry DMSO solvent and orange in mixed solvent DMSO/H2 O (9:1, v/v)...
May 15, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Cao Vu Dung, Eiichi Sasaki
Polyvinylidene Flouride (PVDF) is a film-type polymer that has been used as sensors and actuators in various applications due to its mechanical toughness, flexibility, and low density. A PVDF sensor typically covers an area of the host structure over which mechanical stress/strain is averaged and converted to electrical energy. This study investigates the fundamental "stress-averaging" mechanism for dynamic strain sensing in the in-plane mode. A numerical simulation was conducted to simulate the "stress-averaging" mechanism of a PVDF sensor attached on a cantilever beam subjected to an impact loading, taking into account the contribution of piezoelectricity, the cantilever beam's modal properties, and electronic signal conditioning...
April 27, 2016: Sensors
Huailei Jiang, Stephen G DiMagno, Timothy R DeGrado
Fluorine-18 ((18)F, T 1/2=109.7 min) is a positron-emitting isotope that has found extensive application as a radiolabel for positron emission tomography (PET). Although gaseous (11)C-CO2 and (11)C-CH4 are practically transported from cyclotron to radiochemistry processes, (18)F-fluoride is routinely transported in aqueous solution because it is commonly produced by proton irradiation of (18)O-enriched water. In most cases, subsequent dry-down steps are necessary to prepare reactive (18)F-fluoride for radiofluorination...
December 2015: Journal of Fluorine Chemistry
Huma Nazli Baig, Jagjeet Kaur Saluja, D Harnath, A S Sai Prasad, K V R Murthy
YAlO3: Sm(3+) phosphor has been synthesized by the solid state reaction method with calcium flouride used as a flux. The resulting YAlO3: Sm(3+) phosphor was characterized by X-ray diffraction (XRD) technique, Fourier transmission infrared spectroscopy (FTIR), photoluminescence . . PL excitation spectrum was found at 254,332,380,400,407, 603 and 713 nm. Under excitation of UV(713 nm) YAlO3: Sm(3+) (0-3 %) broad band emission were observed from 400 to 790 nm with a maximum around 713 nm of YAlO3 host lattice accompanied by weak emission of Sm(3+) ((4)G5/2 - (6)H5/2, (6)H7/2,(6)H9/2) transitions...
May 2016: Journal of Fluorescence
Brahmananda Chakraborty
Applying Green-Kubo formalism and equilibrium molecular dynamics (MD) simulations, we have studied for the first time the dynamic correlation, Onsager coefficients, and Maxwell-Stefan (MS) diffusivities of molten salt LiF-BeF2, which is a potential candidate for a coolant in a high temperature reactor. We observe an unusual composition dependence and strikingly a crossover in sign for all the MS diffusivities at a composition of around 7% of LiF where the MS diffusivity between cation-anion pair (Đ(BeF) and Đ(LiF)) jumps from positive to negative value while the MS diffusivity between cation-cation pair (Đ(LiBe)) becomes positive from a negative value...
August 20, 2015: Journal of Physical Chemistry. B
Amira Al-Kharusi, Nuha Al-Lawati, Manal Al-Kindi, Waad-Allah Mula-Abed
OBJECTIVES: To compare glucose values obtained using sodium flouride (NaF) tubes and serum separation tubes (SST) in a tertiary care hospital laboratory setting. METHODS: This study was conducted at the Clinical Biochemistry Laboratory, Royal Hospital, Oman. During the study period (1 September-30 November 2013), 50 pairs (one NaF tube and one SST) of patient's blood specimens were randomly collected. Following separation of plasma (NaF tubes) and serum (SST), glucose concentrations were measured by hexokinase assay using the Architect c8000...
November 2014: Oman Medical Journal
M G González, P A Sorichetti, G D Santiago
This paper presents a model suitable to design and characterize broadband thin film sensors based on piezoelectric polymers. The aim is to describe adequately the sensor behavior, with a reasonable number of parameters and based on well-known physical equations. The mechanical variables are described by an acoustic transmission line. The electrical behavior is described by the quasi-static approximation, given the large difference between the velocities of propagation of the electrical and mechanical disturbances...
November 2014: Review of Scientific Instruments
N Sathe, R V S Chakradhar Raju, V Chandrasekhar
BACKGROUND: Caries process is not a static one, but is dynamic with interspersed periods of demineralization and remineralization of enamel, intimately related and occurs episodically based upon the presence of cariogenic bacteria in dental plaque and the availability of refined carbohydrates for fermentation to organic acids. OBJECTIVES: Early enamel caries could be reversed with avoidance of frank cavitation. The main objective of this study is to check wether enamel demineralization can be prevented by using the remineralizing agents...
January 2014: Kathmandu University Medical Journal (KUMJ)
Ravindra Reddy Regalla, Chandulal Jadav, Devatha Ashok Babu, Roopa Rani S Sriram, Sanjay Krishna Sriram, Vivekanand S Kattimani
BACKGROUND: Orthodontic treatment has gained popularity since beginning of era of dentistry. Now a day, everyone is conscious about their appearance, smile and function. During orthodontic treatment use of brackets and adhesives are common. The bonding of brackets will cause demineralization which requires the fluoridation. So the study has been under- taken to analyze the pattern of fluoride release by commercially available adhesive bonding material for the prevention of demineralization...
January 2014: Journal of Contemporary Dental Practice
Maela Lupo, Maria Lorena Brance, Brenda Lorena Fina, Lucas Ricardo Brun, Alfredo Rigalli
This paper describes a novel methodology for the simultaneous estimation of bone formation (BF) and resorption (BR) in rats using fluoride as a nonradioactive bone-seeker ion. The pharmacokinetics of flouride have been extensively studied in rats; its constants have all been characterized. This knowledge was the cornerstone for the underlying mathematical model that we used to measure bone fluoride uptake and elimination rate after a dose of fluoride. Bone resorption and formation were estimated by bone fluoride uptake and elimination rate, respectively...
January 2015: Journal of Bone and Mineral Metabolism
Liangliang Huo, Kangkang Liu, Junrui Pei, Yanmei Yang, Yan Ye, Yang Liu, Jing Sun, Hepeng Han, Weimin Xu, Yanhui Gao
The BMP/Smad signaling pathway plays an important role in the viability and differentiation of osteoblast; however, it is not clear whether this pathway is involved in the fluoride-induced osteoblast differentiation. In this study, we investigated the role of BMP/Smad signaling pathway in fluoride-induced osteoblast-like Saos-2 cells differentiation. Cells were exposed to fluoride of different concentrations (0, 0.1, 0.2, 0.4, 0.8, and 1.6 mM), and cell proliferation was determined using WST assays. The expression of osteoblast marker genes such as osteocalcin (BGP) and bone alkaline phosphatase (BALP) were detected by qRT-PCR...
October 2013: Biological Trace Element Research
Di-dong Lou, Ji-gang Pan, Kai-lin Zhang, Shuang-li Qin, Yan-fei Liu, Yan-ni Yu, Zhi-zhong Guan
OBJECTIVE: To observe the mitochondrial fragmentation and the expression of mito-fusion 1 gene in the cortical neurons of rats with chronic fluorosis, and to reveal their roles in mitochondria damage to neurons due to chronic fluorosis. METHODS: SD rats were divided randomly into three groups of 20 each (a half females and a half males housed individually in stainless-steel cages), and fed with the different doses of fluoride containing in drinking water (untreated control containing 0 mg/L fluoride, and low-fluoride and high supplemented with 10 and 50 mg/L fluoride, respectively)...
February 2013: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
Indrani Gupta, Abhaysinh Salunkhe, Nanda Rohra, Rakesh Kumar
Groundwater Survey and Development Agency (GSDA), Central Ground Water Board (CGWB) and Maharashtra Pollution Control Board (MPCB) have been carrying out groundwater quality monitoring at about 1407 monitoring locations in various districts of Maharashtra state in India. The groundwater quality data for pH, TDS, total hardness, sulphate, flouride and nitrate were compared with BIS: 10500:2004-2005 standards for drinking purpose. The results show that nitrate pollution is becoming more prevalent in groundwater of Maharashtra...
October 2011: Journal of Environmental Science & Engineering
Amany M A Osman, Erik B Pedersen, Jan Bergman
A new intercalating nucleic acid monomer X was obtained in high yield starting from alkylation of 4-iodophenol with (S)-(+)-2-(2,2-dimethyl-1,3-dioxolan-4-yl)ethanol under Mitsunobu conditions followed by hydrolysis with 80% aqueous acetic acid to give a diol which was coupled under Sonogashira conditions with trimethylsilylacetylene (TMSA) to achieve the TMS protected (S)-4-(4-((trimethylsilyl)ethynyl)phenoxy)butane-1,2-diol. Tetrabutylammonium flouride was used to remove the silyl protecting group to obtain (S)-4-(4-ethynylphenoxy)butane-1,2-diol which was coupled under Sonogashira conditions with 2-(9-bromo-6H-indolo[2,3-b]quinoxalin-6-yl)-N,N-dimethylethanamine to achieve (S)-4-(4-((6-(2-(dimethylamino)ethyl)-6H-indolo[2,3-b]quinoxalin-9-yl)ethynyl)phenoxy)butane-1,2-diol...
2013: Nucleosides, Nucleotides & Nucleic Acids
Y P Bhandary, K N Krithika, Sandeep Kulkarni, M V R Reddy, B C Harinath
Lymphatic filariasis caused mainly by infection fromW. bancrofti andB. malayi remains a major cause of clinical morbidity in tropical and subtropical countries. Analysis ofB. malayi mf, infective larval and adult worm lysates for the activity of enzymes led to the demonstration of activities of three key enzymes of carbohydrate metabolism viz., Malate dehydrogenase (MDH), Malic enzyme (ME) and Glucose-6-phosphate dehydrogenase (G6PDH) in all the three stages of the parasite. The specific activity of all the three dehydrogenases was significantly high in mf lysate compared to their activity in lysates of the other two stages (P<0...
March 2006: Indian Journal of Clinical Biochemistry: IJCB
G Ghanizadeh, M Babaei, Mohammad Reza Naghii, M Mofid, G Torkaman, M Hedayati
Evidence indicates that optimal nutrition plays a role in bone formation and maintenance. Besides major components of mineralization such as calcium, phosphorus, and vitamin D, other nutrients like boron and fluoride have beneficial role, too. In this study, 34 male Wistar rats were divided into five groups: control diet, fluoride, fluoride + boron, fluoride + calcium + vitamin D, and fluoride + boron + calcium + vitamin D. Boron equal to 1.23 mg, calcium and vitamin D equal to 210 mg + 55 IU and fluoride equal to 0...
April 2014: Toxicology and Industrial Health
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