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https://www.readbyqxmd.com/read/27128919/numerical-simulation-of-output-response-of-pvdf-sensor-attached-on-a-cantilever-beam-subjected-to-impact-loading
#1
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...
2016: Sensors
https://www.readbyqxmd.com/read/27003949/production-and-transport-of-gaseous-18-f-synthons-18-f-acyl-fluorides
#2
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
https://www.readbyqxmd.com/read/26983716/preparation-and-photoluminescence-of-sm-3-doped-yalo-3-phosphor
#3
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
https://www.readbyqxmd.com/read/26192629/sign-crossover-in-all-maxwell-stefan-diffusivities-for-molten-salt-lif-bef2-a-molecular-dynamics-study
#4
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
https://www.readbyqxmd.com/read/25584156/are-tubes-containing-sodium-fluoride-still-needed-for-the-measurement-of-blood-glucose-in-hospital-laboratory-practice
#5
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
https://www.readbyqxmd.com/read/25430142/modeling-thin-film-piezoelectric-polymer-ultrasonic-sensors
#6
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
https://www.readbyqxmd.com/read/25219988/effect-of-three-different-remineralizing-agents-on-enamel-caries-formation-an-in-vitro-study
#7
COMPARATIVE STUDY
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)
https://www.readbyqxmd.com/read/24939273/evaluation-and-comparison-of-quantity-and-pattern-of-fluoride-release-from-orthodontic-adhesives-an-in-vitro-study
#8
COMPARATIVE STUDY
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
https://www.readbyqxmd.com/read/24445963/methodology-developed-for-the-simultaneous-measurement-of-bone-formation-and-bone-resorption-in-rats-based-on-the-pharmacokinetics-of-fluoride
#9
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
https://www.readbyqxmd.com/read/23918166/fluoride-promotes-viability-and-differentiation-of-osteoblast-like-saos-2-cells-via-bmp-smads-signaling-pathway
#10
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
https://www.readbyqxmd.com/read/23719111/-changed-expression-of-mito-fusion-1-and-mitochondrial-fragmentation-in-the-cortical-neurons-of-rats-with-chronic-fluorosis
#11
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]
https://www.readbyqxmd.com/read/23505824/groundwater-quality-in-maharashtra-india-focus-on-nitrate-pollution
#12
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
https://www.readbyqxmd.com/read/23448144/synthesis-of-a-new-intercalating-nucleic-acid-6h-indolo-2-3-b-quinoxaline-oligonucleotides-to-improve-thermal-stability-of-hoogsteen-type-triplexes
#13
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
https://www.readbyqxmd.com/read/23105563/detection-of-enzymes-dehydrogenases-and-proteases-inbrugia-malayi-filarial-parasites
#14
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
https://www.readbyqxmd.com/read/22782709/the-effect-of-supplementation-of-calcium-vitamin-d-boron-and-increased-fluoride-intake-on-bone-mechanical-properties-and-metabolic-hormones-in-rat
#15
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
https://www.readbyqxmd.com/read/22686449/allosteric-activation-and-contrasting-properties-of-l-serine-dehydratase-types-1-and-2
#16
Shawei Chen, Xiao Lan Xu, Gregory A Grant
Bacterial L-serine dehydratases differ from mammalian L- and D-serine dehydratases and bacterial D-serine dehydratases by the presence of an iron-sulfur center rather than a pyridoxyl phosphate prosthetic group. They exist in two forms, types 1 and 2, distinguished by their sequence and oligomeric configuration. Both types contain an ASB domain, and the type 1 enzymes also contain an ACT domain in a tandem arrangement with the ASB domain like that in type 1 D-3-phosphoglycerate dehydrogenases (PGDHs). This investigation reveals striking kinetic differences between L-serine dehydratases from Bacillus subtilis (bsLSD, type 1) and Legionella pneumophila (lpLSD, type 2)...
July 3, 2012: Biochemistry
https://www.readbyqxmd.com/read/20957113/exposure-to-sodium-fluoride-produces-signs-of-apoptosis-in-rat-leukocytes
#17
José Gutiérrez-Salinas, José A Morales-González, Eduardo Madrigal-Santillán, Jaime Esquivel-Soto, César Esquivel-Chirino, Manuel García-Luna Y González-Rubio, Sigrit Suástegui-Domínguez, Carmen Valadez-Vega
Fluoride is naturally present in the earth's crust and can be found in rocks, coal, and clay; thus, it can be found in small quantities in water, air, plants, and animals. Therefore, humans are exposed to fluoride through food, drinking water, and in the air they breathe. Flouride is essential to maintain bone strength and to protect against dental decay, but if it is absorbed too frequently, it can cause tooth decay, osteoporosis, and damage to kidneys, bones, nerves, and muscles. Therefore, the present work was aimed at determining the effect of intake of sodium fluoride (NaF) as an apoptosis inducer in leukocytes of rats treated for eight weeks with 1 or 50 parts per million (ppm) NaF...
2010: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/20732037/cytotoxicity-and-chromosome-aberrations-in-normal-human-oral-keratinocytes-induced-by-chemical-carcinogens-comparison-of-inter-individual-variations
#18
T Tsutsui, Y Kawamoto, N Suzuki, B C Gladen, J C Barrett
Normal human keratinocytes from the oral cavity were cultured in vitro in serum-free medium. Cultures from different individuals were established, and the responses of the cells to different chemicals were compared. The cells, grown at clonal densities, were treated separately with an alkylating agent (N-methyl-N'-nitro-N-nitrosoguanidine; MNNG), two arsenical salts (sodium arsenate or sodium arsenite), sodium fluoride or two polyaromatic hydrocarbons (benzo[a]pyrene or 7,12-dimethylbenz[a]-anthracene). There were no significant differences in the colony-forming efficiencies (22...
1991: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/20388116/pet-designated-flouride-18-production-and-chemistry
#19
REVIEW
Orit Jacobson, Xiaoyuan Chen
Positron emission tomography (PET) is a nuclear medicine imaging technology which allows for four-dimensional, quantitative determination of the distribution of labeled biological compounds within the human body. PET is becoming an increasingly important tool for the measurement of physiological, biochemical and pharmacological functions at the molecular level in healthy and pathological conditions. This review will focus on Flouride-18, one of the common isotopes used for PET imaging, which has a half life of 109...
2010: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/20270905/the-condition-of-the-young-dental-pulp-after-the-application-of-sodium-flouride-to-dentin
#20
G H ROVELSTAD
No abstract text is available yet for this article.
November 17, 1947: Dental Research and Graduate Study
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