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https://www.readbyqxmd.com/read/28346896/weak-size-dependence-of-resuspended-radiocesium-adsorbed-on-soil-particles-collected-after-the-fukushima-nuclear-accident
#1
Naoki Kaneyasu, Hideo Ohashi, Fumie Suzuki, Tomoaki Okuda, Fumikazu Ikemori, Naofumi Akata, Toshihiro Kogure
Most studies of the properties of airborne radionuclides emitted from the Fukushima Daiichi Nuclear Power Plant have focused on the relatively early stages of the accident, and little is known about the characteristics of radiocesium in the long-term. In this study, we analyzed activity size distributions of airborne radiocesium collected over 5 months in Tsukuba, Japan. Radiocesium in the accumulation mode size range (0.1-2 μm in aerodynamic diameter) was overwhelming in the early aerosol samples and decreased with time, while that associated with coarse aerosols remained airborne...
March 24, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28346861/biomimetic-remineralization-of-carious-lesions-by-self-assembling-peptide
#2
L Kind, S Stevanovic, S Wuttig, S Wimberger, J Hofer, B Müller, U Pieles
Caries is the most common disease in the world. Great efforts have been undertaken for prevention and to identify a regenerative treatment solution for dental caries. Self-assembling β-sheet forming peptides have previously shown to form 3-dimensional fiber networks supporting tissue regeneration. In particular, the self-assembling peptide P11-4 has shown potential in the treatment and prevention of dental caries. It has previously been shown that application of monomeric P11-4 solution to early carious lesions can increase net mineral gain by forming de novo hydroxyapatite crystals...
March 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28346797/substituted-borosilicate-glasses-with-improved-osteogenic-capacity-for-bone-tissue-engineering
#3
João S Fernandes, Piergiorgio Gentile, Aileen Crawford, Ricardo A Pires, Paul V Hatton, Rui L Reis
Borosilicate bioactive glasses (BBGs) have shown the capacity to promote higher formation of new bone when compared with silicate bioactive glasses. Herein, we assessed the capacity of BBGs to induce osteogenic differentiation of bone marrow mesenchymal stem cells (BM-MSCs) as a function of their substituted divalent cations (Mg(2+), Ca(2+), Sr(2+)). To this purpose, we synthesized BBG particles by melt quenching. The cell viability, proliferation, and morphology (i.e., PrestoBlue(®), PicoGreen(®), and DAPI and Phalloidin stainings, respectively), as well as protein expression (i...
March 27, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28346782/%C3%AE%C2%BA-carrageenan-enhances-the-biomineralization-and-osteogenic-differentiation-of-electrospun-phb-and-phbv-fibers
#4
Nowsheen Goonoo, Behnam Khanbabaee, Marc Steuber, Archana Bhaw-Luximon, Ulrich Jonas, Ullrich Pietsch, Dhanjay Jhurry, Holger Schönherr
Novel electrospun materials for bone tissue engineering were obtained by blending biodegradable polyhydroxybutyrate (PHB) or polyhydroxybutyrate valerate (PHBV) with the anionic sulfated polysaccharide κ-carrageenan (κ-CG) in varying ratios. In both systems, the two components phase separated as shown by FTIR, DSC and TGA. According to the contact angle data, κ-CG was localized preferentially at the fiber surface in PHBV/ κ-CG blends in contrast to PHB/ κ-CG, where the biopolymer was mostly found within the fiber...
March 27, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28346594/stimulant-use-and-bone-mineral-density
#5
Alison Poulton, Karen N W Lee
No abstract text is available yet for this article.
March 27, 2017: JAMA Pediatrics
https://www.readbyqxmd.com/read/28346584/stimulant-use-and-bone-mineral-density-reply
#6
Alexis J Feuer, Ashley Thai
No abstract text is available yet for this article.
March 27, 2017: JAMA Pediatrics
https://www.readbyqxmd.com/read/28346388/thermal-condensation-of-glycine-and-alanine-on-metal-ferrite-surface-primitive-peptide-bond-formation-scenario
#7
Md Asif Iqubal, Rachana Sharma, Sohan Jheeta, Kamaluddin
The amino acid condensation reaction on a heterogeneous mineral surface has been regarded as one of the important pathways for peptide bond formation. Keeping this in view, we have studied the oligomerization of the simple amino acids, glycine and alanine, on nickel ferrite (NiFe₂O₄), cobalt ferrite (CoFe₂O₄), copper ferrite (CuFe₂O₄), zinc ferrite (ZnFe₂O₄), and manganese ferrite (MnFe₂O₄) nanoparticles surfaces, in the temperature range from 50-120 °C for 1-35 days, without applying any wetting/drying cycles...
March 27, 2017: Life
https://www.readbyqxmd.com/read/28346071/mineral-composition-and-toxic-element-levels-of-muscle-liver-and-kidney-of-intensive-swedish-landrace-and-extensive-mangulica-pigs-from-serbia
#8
Dragica Nikolic, Jasna Djinovic-Stojanovic, Sasa Jankovic, Nikola Stanisic, Cedomir Radovic, Lato Pezo, Mila Lausevic
Mineral composition (Fe, Zn, Cu, Mn, Se, Cr, Co, Ni, Na, K, Mg, Ca) and toxic element levels (Cd, Pb, Hg, As) of soil, feed and tissue (muscle, liver and kidney) from intensive (Swedish Landrace, housed indoors, fed a known diet, 4 years) and extensive (Mangulica, free-roaming, non-specified diet, 7-8 months) pigs was determined by inductively coupled plasma mass spectrometry (ICP-MS). Controlled nutrition produced pigs with higher concentrations of most minerals (muscle: Mn, Se, K, Mg; liver: Zn, Cu, Mn, Se, Cr, Ca; kidney: Zn, Cu, Mn, Se, K, Mg), but for Fe, the opposite trend was found...
March 27, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28346061/understanding-the-contamination-of-food-with-mineral-oil-the-need-for-a-confirmatory-analytical-and-procedural-approach
#9
Lionel W Spack, Gabriela Leszczyk, Jesus Varela, Hervé Simian, Thomas Gude, Richard H Stadler
The contamination of food by mineral oil hydrocarbons (MOH) found in packaging is a long running concern. A main source of MOH in foods is the migration of mineral oil from recycled board into the packed food products. Consequently, the majority of food manufacturers have taken protective measures, for example by using virgin board instead of recycled fibers, and where feasible, introducing functional barriers to mitigate migration. Despite these protective measures, MOH may still be observed at low amounts in certain food products, albeit due to different entry points across the food supply chain...
March 27, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28346014/intestinal-absorption-and-renal-reabsorption-of-calcium-throughout-postnatal-development
#10
Megan R Beggs, R Todd Alexander
Calcium is vital for many physiological functions including bone mineralization. Postnatal deposition of calcium into bone is greatest in infancy and continues through childhood and adolescence until peek mineral density is reached in early adulthood. Thereafter, bone mineral density remains static until it eventually declines in later life. A positive calcium balance, i.e. more calcium absorbed than excreted, is crucial to bone deposition during growth and thus to peek bone mineral density. Dietary calcium is absorbed from the intestine into the blood...
April 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28345898/hydrolysis-of-ionic-phthalic-acid-based-polyesters-by-wastewater-microorganisms-and-their-enzymes
#11
Karolina Haernvall, Sabine Zitzenbacher, Katrin Wallig, Motonori Yamamoto, Michael Bernhard Schick, Doris Ribitsch, Georg M Guebitz
Water-soluble polyesters are used in a range of applications today and enter wastewater treatment plants after product utilization. However, little is known about extracellular enzymes and aquatic microorganisms involved in polyester biodegradation and mineralization. In this study, structurally different ionic phthalic acid based polyesters (the number average molecular weights (Mn) 1,770 to 10,000 g/mol and semi crystalline with crystallinity below 1%) were synthesized in various combinations. Typical wastewater microorganisms like Pseudomonas sp...
March 27, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28345842/bone-mineral-density-in-survivors-of-childhood-acute-lymphoblastic-leukemia
#12
Farzaneh Rohani, Khadijeh Arjmandi Rafsanjani, Gholamreza Bahoush, Mansoureh Sabzehparvar, Mohammad Ahmadi
Background: The objective of this study was to evaluate bone mineral density (BMD) after completion of treatment for childhood acute lymphoblastic leukemia (ALL). Methods: In this cross-sectional study, 103 survivors of ALL aged 13.5 ± 0.45 who completed their treatment at least one year earlier were enrolled. Among these, 49.5% and 51.5% received chemotherapy alone and chemotherapy plus cranial radiotherapy, respectively. Bone mineral content, BMD, and bone mineral apparent density in the lumbar spine (LS), femoral neck (FN) and forearm were assessed using dual-energy X-ray absorptiometry (DEXA)...
February 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28345527/prevalence-and-factors-promoting-the-occurrence-of-vitamin-d-deficiency-in-the-elderly
#13
Magdalena Wyskida, Katarzyna Wieczorowska-Tobis, Jerzy Chudek
Vitamin D deficiency affects a large part of the population of elderly people, especially women, who live in moderate climate countries due to a reduced amount of vitamin D in the diet (small sea fish consumption) and reduced content of 7-dehydrocholesterol, which causes decreased skin synthesis. The lowest seasonal concentration of 25(OH)D3 is usually observed during winter and spring. Sun exposure influences 25(OH)D3 concentration more strongly in men than in women. Sociodemographic factors that increase the risk of vitamin D deficiency in the elderly include poor environmental conditions, low economic status, lower educational level, drug exposure (smoking), reduced physical activity, overall poor health and obesity, which causes reduced skin exposure to sunlight...
March 13, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28345049/biomimetic-mineral-self-organization-from-silica-rich-spring-waters
#14
Juan Manuel García-Ruiz, Elias Nakouzi, Electra Kotopoulou, Leonardo Tamborrino, Oliver Steinbock
Purely inorganic reactions of silica, metal carbonates, and metal hydroxides can produce self-organized complex structures that mimic the texture of biominerals, the morphology of primitive organisms, and that catalyze prebiotic reactions. To date, these fascinating structures have only been synthesized using model solutions. We report that mineral self-assembly can be also obtained from natural alkaline silica-rich water deriving from serpentinization. Specifically, we demonstrate three main types of mineral self-assembly: (i) nanocrystalline biomorphs of barium carbonate and silica, (ii) mesocrystals and crystal aggregates of calcium carbonate with complex biomimetic textures, and (iii) osmosis-driven metal silicate hydrate membranes that form compartmentalized, hollow structures...
March 2017: Science Advances
https://www.readbyqxmd.com/read/28344668/diabetes-and-bone-health-latest-evidence-and-clinical-implications
#15
REVIEW
Vikram Sundararaghavan, Matthew M Mazur, Brad Evans, Jiayong Liu, Nabil A Ebraheim
As the prevalence of diabetes is increasing worldwide, research on some of the lesser-known effects, including impaired bone health, are gaining a lot of attention. The two most common forms of diabetes are type 1 diabetes mellitus (T1DM) and type 2 diabetes mellitus (T2DM). These two differ in their physiology, with T1DM stemming from an inability to produce insulin, and T2DM involving an insufficient response to the insulin that is produced. This review aims to highlight the most current information regarding diabetes as it relates to bone health...
March 2017: Therapeutic Advances in Musculoskeletal Disease
https://www.readbyqxmd.com/read/28344582/involvement-of-small-rnas-in-phosphorus-and-sulfur-sensing-signaling-and-stress-current-update
#16
REVIEW
Smita Kumar, Saurabh Verma, Prabodh K Trivedi
Plants require several essential mineral nutrients for their growth and development. These nutrients are required to maintain physiological processes and structural integrity in plants. The root architecture has evolved to absorb nutrients from soil and transport them to other parts of the plant. Nutrient deficiency affects several physiological and biological processes in plants and leads to reduction in crop productivity and yield. To compensate this adversity, plants have developed adaptive mechanisms to enhance the acquisition, conservation, and mobilization of these nutrients under deficient or adverse conditions...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28344457/bone-mineralization-in-rhythmic-gymnasts-entering-puberty-associations-with-jumping-performance-and-body-composition-variables
#17
Kristel Võsoberg, Vallo Tillmann, Anna-Liisa Tamm, Katre Maasalu, Jaak Jürimäe
This study examined bone mineral density (BMD) accrual in prepubertal rhythmic gymnasts entering puberty and their age-matched untrained control girls, and associations with baseline jumping performance and body composition over the 3-year period. Whole body (WB) and femoral neck (FN) BMD, WB fat mass (FM) and fat free mass (FFM), countermovement jump (CMJ) and rebound jumps for 15 s (RJ15s) were assessed in 25 rhythmic gymnasts and 25 untrained controls at baseline and after 3-year period. The changes over this period were calculated (Δ scores)...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28344201/stenotic-bicuspid-and-tricuspid-aortic-valves%C3%A3-micro-computed-tomography-and-biological-indices-of-calcification
#18
Piotr Mazur, Ewa Wypasek, Bogusław Gawęda, Dorota Sobczyk, Przemysław Kapusta, Joanna Natorska, Krzysztof Piotr Malinowski, Jacek Tarasiuk, Maciej Bochenek, Sebastian Wroński, Katarzyna Chmielewska, Bogusław Kapelak, Anetta Undas
BACKGROUND: Valve calcification is well estimated by ex-vivo micro-computed tomography (micro-CT). The objective of this study was to investigate the associations between micro-CT findings and biological indices of calcification in aortic stenosis (AS), as well as differences between bicuspid aortic valve (BAV) and tricuspid aortic valve (TAV).Methods and Results:Aortic valves and plasma were obtained from patients undergoing valve surgery. Valves were dissected and underwent micro-CT, genetic analyses, and calcium content assessment...
March 24, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28343926/cobalt-chloride-enhances-the-stemness-of-human-dental-pulp-cells
#19
Kantaporn Laksana, Sireerat Sooampon, Prasit Pavasant, Wannakorn Sriarj
INTRODUCTION: Hypoxia is a factor in controlling stem cell stemness. We investigated if cobalt chloride (CoCl2), a chemical agent that mimics hypoxia in vitro, affected human dental pulp cell (hDPC) stemness by examining cell proliferation, stem cell marker expression, and osteogenic differentiation. METHODS: hDPCs were cultured with or without 25 or 50 μmol/L CoCl2. The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay was used to determine cell proliferation...
March 23, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28343716/transformation-of-zinc-concentrate-in-surface-and-subsurface-environments-implications-for-assessing-zinc-mobility-toxicity-and%C3%A2-choosing-an-optimal-remediation-strategy
#20
Man Jae Kwon, Maxim I Boyanov, Jung-Seok Yang, Seunghak Lee, Yun Ho Hwang, Ju Yeon Lee, Bhoopesh Mishra, Kenneth M Kemner
Zinc contamination in near- and sub-surface environments is a serious threat to many ecosystems and to public health. Sufficient understanding of Zn speciation and transport mechanisms is therefore critical to evaluating its risk to the environment and to developing remediation strategies. The geochemical and mineralogical characteristics of contaminated soils in the vicinity of a Zn ore transportation route were thoroughly investigated using a variety of analytical techniques (sequential extraction, XRF, XRD, SEM, and XAFS)...
March 24, 2017: Environmental Pollution
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