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https://www.readbyqxmd.com/read/29334438/in-vitro-and-in-vivo-evaluations-of-the-anticalculus-effect-of-a-novel-stabilized-stannous-fluoride-dentifrice
#1
Tao He, Mary Kay Anastasia, Marianne Zsiska, Teresa Farmer, Eva Schneiderman, Jeffery L Milleman
OBJECTIVES: To evaluate the effect of a novel stannous fluoride dentifrice with zinc citrate on calculus inhibition using both in vitro and clinical models. METHODS: Each investigation tested a novel stabilized 0.454% stannous fluoride dentifrice with zinc citrate as an anticalculus agent (Crest® Pro-Health™ smooth formula) compared to a negative control fluoride dentifrice. The in vitro study used the modified Plaque Growth and Mineralization Model (mPGM). Plaque biofilms were prepared and mineralized by alternate immersion of glass rods in human saliva and artificial mineralization solution...
December 2017: Journal of Clinical Dentistry
https://www.readbyqxmd.com/read/29334399/chondrocyte-burst-promotes-space-for-mineral-expansion
#2
Emilio Satoshi Hara, Masahiro Okada, Noriyuki Nagaoka, Takako Hattori, Letycia Mary Iida, Takuo Kuboki, Takayoshi Nakano, Takuya Matsumoto
Analysis of tissue development from multidisciplinary approaches can result in more integrative biological findings, and can eventually allow the development of more effective bioengineering methods. In this study, we analyzed the initial steps of mineral formation during secondary ossification of mouse femur based on biological and bioengineering approaches. We first found that some chondrocytes burst near the mineralized area. External factors that could trigger chondrocyte burst were then investigated. Chondrocyte burst was shown to be modulated by mechanical and osmotic pressure...
January 15, 2018: Integrative Biology: Quantitative Biosciences From Nano to Macro
https://www.readbyqxmd.com/read/29334043/a-tribute-to-james-parkinson
#3
André Parent
Exactly 200 years ago, the London surgeon-apothecary James Parkinson (1755-1824) published a 66-page-long booklet entitled An Essay on the Shaking Palsy, which contains the first clear clinical description of the shaking palsy or paralysis agitans, which we now refer to as Parkinson's disease. However, the value of this essay was not fully recognized during Parkinson's lifetime, which spanned the American Revolution, the French Revolution, and the Napoleonic Wars. James Parkinson was one of the most singular figures of his time and place...
January 2018: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/29333858/mineral-and-base-catalyzed-hydrolysis-of-organophosphate-flame-retardants-a-potential-major-fate-controlling-sink-in-soil-and-aquatic-environments
#4
Yida Fang, Erin Kim, Timothy J Strathmann
The ubiquitous occurrence of organophosphate flame retardants (OPFRs) in aquatic and soil environments poses significant risks to human health and ecosystems. Here, we report on the hydrolysis of six OPFRs and three structural analogues in the absence and presence of metal (hydr)oxide minerals. Eight of the target compounds showed marked degradation in alkaline solutions (pH 9-12) with half-lives ranging from 0.02 - 170 d. Kinetics follow a second-order rate law with apparent rate constants for base-catalyzed hydrolysis (kB) ranging from 0...
January 15, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29333323/alveolar-ridge-preservation-with-an-open-healing-approach-using-single-layer-or-double-layer-coverage-with-collagen-membranes
#5
Ho-Keun Choi, Hag-Yeon Cho, Sung-Jo Lee, In-Woo Cho, Hyun-Seung Shin, Ki-Tae Koo, Hyun-Chang Lim, Jung-Chul Park
Purpose: The aim of this prospective pilot study was to compare alveolar ridge preservation (ARP) procedures with open-healing approach using a single-layer and a double-layer coverage with collagen membranes using radiographic and clinical analyses. Methods: Eleven molars from 9 healthy patients requiring extraction of the maxillary or mandibular posterior teeth were included and allocated into 2 groups. After tooth extraction, deproteinized bovine bone mineral mixed with 10% collagen was grafted into the socket and covered either with a double-layer of resorbable non-cross-linked collagen membranes (DL group, n=6) or with a single-layer (SL group, n=5)...
December 2017: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/29333047/assessment-of-nutritional-quality-and-global-antioxidant-response-of-banana-musa-sp-cv-nanjangud-rasa-bale-pseudostem-and-flower
#6
Ramith Ramu, Prithvi S Shirahatti, K R Anilakumar, Shivasharanappa Nayakavadi, Farhan Zameer, B L Dhananjaya, M N Nagendra Prasad
Background: The assessment of the nutritional composition and phytochemical screening of banana pseudostem (PB) and flower (FB) advocate this nonconventional food source for routine consumption, considering its various health benefits. Objectives: The aim is to assess the proximate nutrient composition, fatty acids, minerals, amino acid profile, and global antioxidant response (GAR) of PB and FB. Methods: Standard analytical procedures were used to determine the nutritional quality and GAR of PB and FB...
December 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/29332861/epicardial-fat-thickness-and-bone-mineral-content-the-healthy-twin-study-in-korea
#7
Dong-Won Lee, Min Soo Cho, Eun Yeong Choe, Seung Woo Park, Yun-Mi Song, Sang-Chol Lee, Joohon Sung
BACKGROUND: The conventional concept of positive association between general obesity and bone health was challenged in recent studies reporting the different effects of specific fat deposition on bone health. In the present study, we investigated the association between epicardial fat and bone health. METHODS: We measured echocardiographic epicardial fat thickness (EFT) and bone mineral content (BMC) in a twin-family cohort of Koreans (n = 1,198; 525 men, 460 pre- and 213 post-menopausal women)...
January 13, 2018: Journal of Epidemiology
https://www.readbyqxmd.com/read/29332830/novel-approach-in-k0-naa-for-highly-concentrated-ree-samples
#8
M Abdollahi Neisiani, M Latifi, J Chaouki, C Chilian
The present paper presents a new approach for k0-NAA for accurate quantification with short turnaround analysis times for rare earth elements (REEs) in high content mineral matrices. REE k0 and Q0 values, spectral interferences and nuclear interferences were experimentally evaluated and improved with Alfa Aesar Specpure Plasma Standard 1000mgkg-1 mono-rare earth solutions. The new iterative gamma-ray self-attenuation and neutron self-shielding methods were investigated with powder standards prepared from 100mg of 99...
April 1, 2018: Talanta
https://www.readbyqxmd.com/read/29332388/immersion-and-contact-efflorescence-induced-by-mineral-dust-particles
#9
Shuichi B Ushijima, Ryan D Davis, Margaret A Tolbert
The phase state of inorganic salt aerosols impacts their properties including the ability to undergo hygroscopic growth, catalyze heterogeneous reactions, and act as cloud condensation nuclei. Here, we report the first observation of contact efflorescence by mineral dust aerosol. The efflorescence of aqueous ammonium sulfate ((NH4)2SO4) and sodium chloride (NaCl) droplets by contact with three types of mineral dust particles (illite, montmorillonite, and NX Illite), were examined using an optical levitation chamber...
January 13, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29332280/hydrogeochemical-processes-and-influence-of-seawater-intrusion-in-coastal-aquifers-south-of-chennai-tamil-nadu-india
#10
G Kanagaraj, L Elango, S G D Sridhar, G Gowrisankar
Seawater intrusion promotes the salinity of groundwater, and it poses a great environmental impact on a global scale. The present study was carried out to determine the hydrogeochemical processes and influence of seawater intrusion in the coastal aquifers using geophysical, geochemical, and stable isotope techniques. The true resistivity value ranges from 0.5 to 8008.5 Ω-m which has been measured using vertical electrical sounding (VES) based on the Schlumberger method. About 33 groundwater samples were collected during post-monsoon (POM) (January 2012) and pre-monsoon (PRM) (June 2012) seasons from open and bore wells and were analyzed for major ions and stable isotopes...
January 14, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29332174/a-friend-in-knee-ccn3-may-inhibit-osteoarthritis-progression
#11
Alex Peidl
Osteoarthritis (OA) is a major clinical problem among the ageing population, yet no disease-modifying treatments currently exist. This issue arises, in part, due to the complex processes occurring in the microenvironment of articular cartilage that lead to osteoarthritic changes. Gaining a better understanding of these processes is crucial in developing a viable therapy for OA. A recent report in Journal of Bone Mineral Metabolism by Janune et al. (J Bone Miner Metab 35:582-597, 2016) suggests a novel role for CCN3 in maintaining the differentiated phenotype of articular cartilage...
January 13, 2018: Journal of Cell Communication and Signaling
https://www.readbyqxmd.com/read/29332162/roles-of-irisin-in-the-linkage-from-muscle-to-bone-during-mechanical-unloading-in-mice
#12
Naoyuki Kawao, Akihiro Moritake, Kohei Tatsumi, Hiroshi Kaji
Mechanical unloading induces disuse muscle atrophy and bone loss, but the details in mechanism involved in those pathophysiological conditions are not fully understood. Interaction between muscle and bone has been recently noted. Here, we investigated the roles of humoral factors linking muscle to bone during mechanical unloading using mice with hindlimb unloading (HU) and sciatic neurectomy (SNX). HU and SNX reduced muscle volume surrounding the tibia, tissue weights of soleus and gastrocnemius muscle, and trabecular bone mineral density (BMD) in the tibia of mice...
January 13, 2018: Calcified Tissue International
https://www.readbyqxmd.com/read/29331908/electricity-production-and-phosphorous-recovery-as-struvite-from-synthetic-wastewater-using-magnesium-air-fuel-cell-electrocoagulation
#13
Jung Hwan Kim, Byung Min An, Dae Hwan Lim, Joo Yang Park
This research was based on the investigation of a major principle, regarding the effects of NaCl and KH2PO4 concentrations on struvite recovery, with electricity production using magnesium-air fuel cell electrocoagulation, in accordance with the concentration of phosphorous and chloride. The weight ratio of N:P in the synthetic wastewater was in the range of 1.2-21. The concentration of NH4Cl was fixed at 0.277 M (approximately 3888 ppm as NH3-N and 5000 ppm as NH4), while PO4-P was in the range of 0...
January 5, 2018: Water Research
https://www.readbyqxmd.com/read/29331907/applying-ultraviolet-persulfate-uv-ps-pre-oxidation-for-controlling-ultrafiltration-membrane-fouling-by-natural-organic-matter-nom-in-surface-water
#14
Jiayu Tian, Cuiwei Wu, Huarong Yu, Shanshan Gao, Guibai Li, Fuyi Cui, Fangshu Qu
Membrane fouling is a recognized obstacle for the application of ultrafiltration (UF) for drinking water treatment. In this study, ultraviolet/persulfate (UV/PS) oxidation was employed as a pretreatment to control membrane fouling caused by natural organic matter (NOM) in surface water. The effects of UV/PS pretreatment on amounts and characteristics of NOM were investigated in terms of dissolved organic carbon, fluorescent spectrum, molecular weight distribution and hydrophobicity. UF membrane fouling during filtration of raw and pre-oxidized water was compared with transmembrane pressure development, and the fouled membranes were further characterized using scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR)...
January 5, 2018: Water Research
https://www.readbyqxmd.com/read/29331896/environmentally-available-hexavalent-chromium-in-soils-and-sediments-impacted-by-dispersed-fly-ash-in-sarigkiol-basin-northern-greece
#15
Nerantzis Kazakis, Nikolaos Kantiranis, Kyriaki Kalaitzidou, Efthimia Kaprara, Manassis Mitrakas, Robert Frei, George Vargemezis, Dimitrios Vogiatzis, Anastasios Zouboulis, Anestis Filippidis
Hexavalent chromium is one of the most toxic and carcinogenic species known and can be released into the environment from several sources. In Sarigkiol basin (N Greece) the presence of Cr(VI) in soil, sediments and groundwater may originate from both natural (ophiolitic rocks and their weathering products) and anthropogenic (dispersed fly ash produced from lignite power plants) sources. In this study, the distribution of contents and origin of environmentally available Cr(VI) in soils, sediments, regoliths and fly ash of Sarigkiol basin is presented...
January 11, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29331826/pathway-and-mechanism-of-nitrogen-transformation-during-composting-functional-enzymes-and-genes-under-different-concentrations-of-pvp-agnps
#16
Guangming Zeng, Lihua Zhang, Haoran Dong, Yaoning Chen, Jiachao Zhang, Yuan Zhu, Yujie Yuan, Yankai Xie, Wei Fang
Polyvinylpyrrolidone coated silver nanoparticles (PVP-AgNPs) were applied at different concentrations to reduce total nitrogen (TN) losses and the mechanisms of nitrogen bio-transformation were investigated in terms of the nitrogen functional enzymes and genes. Results showed that mineral N in pile 3 which was treated with AgNPs at a concentration of 10 mg/kg compost was the highest (6.58 g/kg dry weight (DW) compost) and the TN loss (47.07%) was the lowest at the end of composting. Correlation analysis indicated that TN loss was significantly correlated with amoA abundance...
December 29, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29331769/source-identification-of-uranium-containing-materials-at-mine-legacy-sites-in-portugal
#17
A C Keatley, P G Martin, K R Hallam, O D Payton, R Awbery, F Carvalho, J M Oliveira, L Silva, M Malta, T B Scott
Whilst prior nuclear forensic studies have focused on identifying signatures to distinguish between different uranium deposit types, this paper focuses on providing a scientific basis for source identification of materials from different uranium mine sites within a single region, which can then be potentially used within nuclear forensics. A number of different tools, including gamma spectrometry, alpha spectrometry, mineralogy and major and minor elemental analysis, have been utilised to determine the provenance of uranium mineral samples collected at eight mine sites, located within three different uranium provinces, in Portugal...
January 10, 2018: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29331722/effect-of-vitamin-d-supplementation-on-serum-sclerostin-levels-in-chronic-kidney-disease
#18
REVIEW
Ashok Kumar Yadav, Vivek Kumar, Debasish Banerjee, Krishan Lal Gupta, Vivekanand Jha
Vitamin D deficiency, cardiovascular disease and abnormal bone mineral metabolism are common in chronic kidney disease (CKD). Abnormal bone mineral metabolism has been linked to vascular calcification in CKD. Sclerostin has emerged as an important messenger in cross talk between bone-vascular axis. We analyzed sclerostin in subjects who participated in the randomized, double blind, placebo controlled trial investigating the effect of cholecalciferol supplementation on vascular function in non-diabetic CKD stage G3-4 and vitamin D ≤20ng/ml [CTRI/2013/05/003648]...
January 10, 2018: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29331640/recent-advances-in-application-of-uv-light-emitting-diodes-for-degrading-organic-pollutants-in-water-through-advanced-oxidation-processes-a-review
#19
REVIEW
Galina Matafonova, Valeriy Batoev
Over the last decade, ultraviolet light-emitting diodes (UV LEDs) have attracted considerable attention as alternative mercury-free UV sources for water treatment purposes. This review is a comprehensive analysis of data reported in recent years (mostly, post 2014) on the application of UV LED-induced advanced oxidation processes (AOPs) to degrade organic pollutants, primarily dyes, phenols, pharmaceuticals, insecticides, estrogens and cyanotoxins, in aqueous media. Heterogeneous TiO2-based photocatalysis in lab grade water using UVA LEDs is the most frequently applied method for treating organic contaminants...
January 4, 2018: Water Research
https://www.readbyqxmd.com/read/29331560/the-effects-of-sediment-transport-on-temporal-variation-in-radiocesium-concentrations-in-very-shallow-water-off-the-southern-coast-of-fukushima-japan
#20
Akira Matsumoto, Hiroshi Myouse, Hisayuki Arakawa, Ken Higuchi, Naoto Hirakawa, Yoshiaki Morioka, Takuji Mizuno
We studied the very shallow coastal water off Iwaki City, Fukushima Prefecture, and investigated: (1) temporal variation in 137Cs concentrations; (2) particle-size distribution of sediments; and (3) the effect on variation by waves, component-fractionated concentration of radiocesium and mineral composition at three sampling stations (Yotsukura, Ena rocky reef and Ena sandy station). There was a decline in 137Cs concentrations in sediment samples at all sampling stations between 425 and 1173 days after the accident...
January 11, 2018: Journal of Environmental Radioactivity
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