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Fluoridation

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https://www.readbyqxmd.com/read/28454084/preliminary-biological-evaluation-of-18f-alf-nota-mal-cys-annexin-v-as-a-novel-apoptosis-imaging-agent
#1
Chunxiong Lu, Quanfu Jiang, Minjin Hu, Cheng Tan, Huixin Yu, Zichun Hua
A novel annexin V derivative (Cys-Annexin V) with a single cysteine residue at its C-terminal has been successfully labeled site-specifically with NOTA-maleimide aluminum [18F]fluoride complexation and evaluated it as a novel apoptosis agent in vitro and in vivo. The total synthesis time of 18F-AlF-NOTA-MAL-Cys-Annexin V from [18F]fluoride was about 65 min. The tracer was stable in vitro and it was excreted through renal in normal mice. The rate of the tracer bound to erythrocytes with exposed phosphatidylserine was 89...
April 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28453591/-the-impact-of-tap-water-fluoridation-on-human-health
#2
Verena Romero, Frances J Norris, Juvenal A Ríos, Isel Cortés, Andrea González, Leonardo Gaete, Andrei N Tchernitchin
The purpose of this review is to describe the osteological, neurological, endocrine and dermatological effects of fluoride ingestion. Additional aims are to evaluate whether the Chilean tap water fluoridation program has had any impact on dental health, and analyze the basis for the Chilean elementary school milk fluoridation program, which is targeted at children living in places where tap water has a fluoride concentration less than 0.3 mg/L, without any artificial fluoridation process. We discuss the finding that both public measures have no direct or remarkable effect on dental health, since topical dental hygiene products are the main and most effective contributors to the prevention of dental decay...
February 2017: Revista Médica de Chile
https://www.readbyqxmd.com/read/28453247/building-an-electronic-bridge-via-ag-decoration-to-enhance-kinetics-of-iron-fluoride-cathode-in-lithium-ion-batteries
#3
Yu Li, Xingzhen Zhou, Ying Bai, Guanghai Chen, Zhaohua Wang, Hui Li, Feng Wu, Chuan Wu
As a typical multi-electron cathode material for lithium ion batteries, iron fluoride (FeF3) and its analogues suffer from poor electronic conductivity and low actual specific capacity. Herein, we introduce Ag nanoparticles by silver mirror reaction into the FeF3·0.33H2O cathode to build the electronic bridge between the solid (active materials) and liquid (electrolyte) interface. The crystal structures of as-prepared samples are characterized by XRD and Rietveld refinement. Moreover, the density of states (DOS) of FeF3·0...
April 28, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28448149/hofmeister-effect-on-pnipam-in-bulk-and-at-an-interface-surface-partitioning-of-weakly-hydrated-anions
#4
Saeed Zajforoushan Moghaddam, Esben Thormann
Effect of sodium fluoride, sodium trichloroacetate, and sodium thiocyanate on the stability and conformation of poly(N-isopropylacrylamide), in bulk solution and at the gold-aqueous interface, is investigated by differential scanning calorimetry, dynamic light scattering, quartz crystal microbalance, and atomic force microscopy. The results indicate a surface partitioning of the weakly hydrated anions, i.e., thiocyanate and trichloroacetate, and the findings are discussed in terms of anion-induced electrostatic stabilization...
April 27, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28448083/are-dietary-supplements-and-nutraceuticals-effective-for-musculoskeletal-health-and-cognitive-function-a-scoping-review
#5
G Iolascon, R Gimigliano, M Bianco, A De Sire, A Moretti, A Giusti, N Malavolta, S Migliaccio, A Migliore, N Napoli, P Piscitelli, G Resmini, U Tarantino, F Gimigliano
OBJECTIVE: The aim of our scoping review was to summarize the state of the art regarding micronutrients in order to identify which of them might effectively improve health status in the areas typically impaired in older people: bone, skeletal muscle, and cognitive function. DESIGN: Scoping review. METHODS: The Italian Study Group on Healthy Aging by Nutraceuticals and Dietary Supplements (HANDS) performed this scoping review, based on the following steps: doing a list of micronutrients related with musculoskeletal or cognitive functions, included in dietary supplements and nutraceuticals commercialized in Italy; planning a research on PubMed, according to an evidence-based approach, in order to the most relevant positive study for each micronutrient into each of the three areas involved (bone, skeletal muscle and cognitive function); identifying the micronutrients effective in maintaining or achieving an adequate health status in older people, specifying the effective and safe daily doses, according to the selected studies...
2017: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/28447784/dft-based-comparative-study-about-the-influence-of-fluorine-and-hydroxyl-anions-on-opto-electric-properties-of-borate-crystals-choice-for-better-anion
#6
Beenish Bashir, Bingbing Zhang, Ming-Hsien Lee, Shilie Pan, Zhihua Yang
Replacing hydroxyl anions OH¯ by fluorine anions F¯ in borates can cause the blue shift of the UV cutoff edge and also exhibits apparent differences in nonlinear optical (NLO) properties. To clarify the intrinsic difference between OH¯ anions and F¯ anions, several typical borates with different types of cations (p-cations with lone-pair electrons, trivalent rare-earth, and alkaline earth metals) have been studied. The theoretical studies reveal that the blue shift in the band gap of borates with fluorine as compared to those with hydroxyl can be assumed to be the result of weaker interaction of the cation-fluoride (La/Bi/B-F) bonds compared to that of the cation-oxygen and hydroxyl bonds...
April 27, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28447695/phase-transformation-of-tio2-nanoparticles-by-femtosecond-laser-ablation-in-aqueous-solutions-and-deposition-on-conductive-substrates
#7
Paola Russo, Robert Liang, Rui Xiu He, Y Norman Zhou
Titanium dioxide (TiO2) is a wide bandgap semiconductor that is chemically stable, non-toxic, and economical compared to other semiconductors and has been implemented in a wide range of applications such as photocatalysis, photovoltaics, and memristors. In this work we studied the femtosecond laser ablation of titanium dioxide powders (P25) dispersed either in water or deposited onto a fluoride-doped tin oxide (FTO) substrate. The process was used as a route to induce the phase-transformation of TiO2 nanoparticles which was governed by laser parameters such as ablation time and power...
April 27, 2017: Nanoscale
https://www.readbyqxmd.com/read/28447546/application-of-an-indicator-immobilized-gel-sheet-for-measuring-the-ph-surrounding-a-calcium-phosphate-based-biomaterial
#8
Taisuke Masuda, Hisataka Maruyama, Fumihito Arai, Takahisa Anada, Kaori Tsuchiya, Toshio Fukuda, Osamu Suzuki
The present study was designed to investigate the local microenvironment of octacalcium phosphate in a granule form upon biomolecules adsorption utilizing an indicator-immobilized-gel-sheet for measuring pH. We previously showed that octacalcium phosphate enhances bone regeneration during its progressive hydrolysis into hydroxyapatite if implanted in bone defects. The gel-sheet was made from a photocrosslinkable prepolymer solution, which can easily immobilize a pH indicator (bromothymol blue; BTB) in the hydrogel...
April 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/28447189/potentiometric-determination-of-fluoride-concentration-in-beers
#9
Juan Ramón Jaudenes, Arturo Hardisson, Soraya Paz, Carmen Rubio, Angel José Gutiérrez, Antonio Burgos, Consuelo Revert
Beer is a widely consumed drink throughout the world, and because its manufacture involves the use of water, beer can be, in some cases, a source of fluorides. For this reason, the objective of this study was to determine the concentration of fluorides in 50 samples of beers from different sources sold in two different types of container (aluminum can and glass bottle). The possible significant differences between the different types of packaging and the intake of fluoride from the consumption of these beers were evaluated...
April 26, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28444927/endo-%C3%AE-mannosidase-catalyzed-transglycosylation
#10
Shogo Iwamoto, Yuta Kasahara, Yayoi Yoshimura, Akira Seko, Yoichi Takeda, Yukishige Ito, Kiichiro Totani, Ichiro Matsuo
In order for facilitating the synthesis of oligosaccharides, transglycosylation reactions mediated by glycoside hydrolases have been studied in various contexts. In this study, we examined transglycosylating activity of Golgi endo-α-mannosidase. To this end, we prepared various glycosyl donors and acceptors, and recombinant human Golgi endo-α-mannosidase and its various mutants were expressed. We showed that Golgi endo-α-mannosidase was able to mediate transglycosylation from α-glycosyl-fluorides. Systematic screening of various point mutants revealed that the E407D mutant had excellent transglycosylation activity and extremely low hydrolytic activity...
April 26, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28443656/acyl-fluorides-fast-efficient-and-versatile-lysine-based-protein-conjugation-via-plug-and-play-strategy
#11
Igor Dovgan, Sylvain Ursuegui, Stéphane Erb, Chloé Michel, Sergii Kolodych, Sarah Cianférani, Alain Wagner
We report a plug-and-play strategy for the preparation of functionally enhanced antibodies with a defined average degree of conjugation (DoC). The first stage (plug) allows the controllable and efficient installation of azide groups on lysine residues of a native antibody using 4-azidobenzoyl fluoride. The second step (play) allows for versatile antibody functionalization with a single payload or combination of payloads, such as a toxin, a fluorophore, or an oligonucleotide, via copper-free strain-promoted azide-alkyne cycloaddition (SPAAC)...
April 26, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28443335/selective-complexation-of-cyanide-and-fluoride-ions-with-ammonium-boranes-a-theoretical-study-on-sensing-mechanism-involving-intramolecular-charge-transfer-and-configurational-changes
#12
Haamid Rasool Bhat, Prakash Chandra Jha
The anion binding selectivity and the recognition mechanism of two isomeric boranes namely 4-[bis(2,4,6-trimethylphenyl)boranyl]-N,N,N-trimethylaniline ([p-(Mes2B)C6H4(NMe3)]+, 1, where 'Mes' represents mesitylene and 'Me' represents methyl) and 2-[bis(2,4,6-trimethylphenyl)boranyl]-N,N,N-trimethylaniline ([o-(Mes2B)C6H4(NMe3)]+, 2) has been investigated using density functional theory (DFT) and time dependent-density functional theory (TD-DFT) methods. Natural population analysis indicates that the central boron atoms in 1 and 2 are the most active centers for nucleophilic addition of anions...
April 26, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28441602/fluoride-and-iodine-enrichment-in-groundwater-of-north-china-plain-evidences-from-speciation-analysis-and-geochemical-modeling
#13
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/28441419/correction-fluoride-regulate-osteoblastic-transforming-growth-factor-%C3%AE-1-signaling-by-mediating-recycling-of-the-type-i-receptor-alk5
#14
Chen Yang, Yan Wang, Hui Xu
[This corrects the article DOI: 10.1371/journal.pone.0170674.].
2017: PloS One
https://www.readbyqxmd.com/read/28441368/skeletal-scintigraphy
#15
Jaime L Montilla-Soler, Rikesh Makanji
BACKGROUND: Skeletal scintigraphy remains a valuable tool in the initial and subsequent evaluation of the skeletal system in patients with a diagnosis of primary or metastatic neoplasms. METHODS: We discuss radiopharmaceuticals, nuclear medicine imaging techniques, and current as well as future oncological applications in the adult population. Pertinent literature was reviewed to describe the advantages and limitations of available technologies for the evaluation of skeletal metastatic disease...
April 2017: Cancer Control: Journal of the Moffitt Cancer Center
https://www.readbyqxmd.com/read/28441341/a-long-term-treatment-with-arachidonyl-2-chloroethylamide-combined-with-valproate-increases-neurogenesis-in-a-mouse-pilocarpine-model-of-epilepsy
#16
Marta Andres-Mach, Mirosław Zagaja, Agnieszka Haratym-Maj, Radosław Rola, Maciej Maj, Joanna Haratym, Monika Dudra-Jastrzębska, Jarogniew J Łuszczki
Rational polytherapy in the treatment of refractory epilepsy has been the main therapeutic modality for several years. In treatment with two or more antiepileptic drugs (AEDs), it is of particular importance that AEDs be selected based on their high anticonvulsant properties, minimal side effects, and impact on the formation of new neurons. The aim of the study was to conduct an in vivo evaluation of the relationship between treatments with synthetic cannabinoid arachidonyl-2'-chloroethylamide (ACEA) alone or in combination with valproic acid (VPA) and hippocampal neurogenesis in a mouse pilocarpine model of epilepsy...
April 25, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28441035/arsenic-and-fluoride-removal-by-potato-peel-and-rice-husk-pprh-ash-in-aqueous-environments
#17
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/28440891/evaluation-of-three-different-decontamination-techniques-on-biofilm-formation-and-on-physical-and-chemical-properties-of-resin-composites
#18
Carolina Bosso André, Andressa Dos Santos, Carmem Silvia Pfeifer, Marcelo Giannini, Emerson Marcelo Girotto, Jack Liborio Ferracane
OBJECTIVES: This study evaluated three different sterilization/disinfection techniques for resin composites on bacterial growth and surface modification after decontamination. METHODS: Two resin composites were sterilized/disinfected with three different techniques: UV light, 1% chloramine T, and 70% ethanol. Four different times were used for each technique to determine the shortest time that the solution or UV light was effective. The influence of sterilization/disinfection technique on bacterial growth was evaluated by analyzing the metabolic activity, using the AlamarBlue™ assay, bacterial viability, and SEM images from biofilms of Streptococcus mutans...
April 25, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28440649/asymmetric-synthesis-of-trisubstituted-tetrahydrothiophenes-via-in-situ-generated-chiral-fluoride-catalyzed-cascade-sulfa-michael-aldol-reaction-of-1-4-dithiane-2-5-diol-and-%C3%AE-%C3%AE-unsaturated-ketones
#19
Mengying Duan, Yidong Liu, Jun Ao, Lu Xue, Shilong Luo, Yu Tan, Wenling Qin, Choong Eui Song, Hailong Yan
A chiral fluoride-catalyzed asymmetric cascade sulfa-Michael/aldol condensation reaction of 1,4-dithiane-2,5-diol and a series of α,β-unsaturated ketones is described to access chiral trisubstituted tetrahydrothiophene derivatives. The target products, including the spiro tetrahydrothiophene derivatives bearing a five-, six-, and seven-membered ring, were highly functionalized and showed high ee value. This established protocol realized a highly enantioselective reaction with a catalytic amount of KF and Song's chiral oligoEG via in situ generated chiral fluoride to construct useful heterocyclic skeletons with great complexity...
April 25, 2017: Organic Letters
https://www.readbyqxmd.com/read/28439992/the-construction-of-homochiral-lanthanide-quadruple-stranded-helicates-with-multi-responsive-sensing-properties-toward-fluoride-anions
#20
Wanmin Chen, Xiaoliang Tang, Wei Dou, Bei Wang, Lirong Guo, Zhenghua Ju, Weisheng Liu
A series of unique homochiral lanthanide tetranuclear quadruple-stranded helicates have been self-assembled controllably by taking the intrinsic advantages of chiral dentate-bridging ligands, (S)-H2L and (R)-H2L, and lanthanide ions with high coordination numbers. The self-assembly process of these chiral helicates not only ensures the structural stability and quadruple-stranded feature of lanthanide cluster in solid and solution, but also achieves the effective transfer and amplification of chirality code from ligand to higher supramolecular level...
April 24, 2017: Chemistry: a European Journal
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