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Trace minerals

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https://www.readbyqxmd.com/read/29244244/mineral-apposition-rates-in-coronal-dentine-of-mandibular-first-molars-in-soay-sheep-results-of-a-fluorochrome-labeling-study
#1
Patricia Kahle, Carsten Witzel, Uwe Kierdorf, Kai Frölich, Horst Kierdorf
We studied the spatio-temporal variation of mineral apposition rate (MAR) in postnatally formed coronal dentine of mandibular first molars from Soay sheep repeatedly injected with different fluorochromes. MARs declined along the cuspal to cervical crown axis, and from early to late formed dentine, i.e., from the dentine at the enamel-dentine-junction (EDJ) to the dentine adjacent to the dentine-pulp-interface (DPI). Highest mean MARs (about 21 µm/day) were recorded in cuspal dentine formed in the period of 28-42 days after birth...
December 15, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29236516/trace-minerals-intake-risks-and-benefits-for-cardiovascular-health
#2
Noushin Mohammadifard, Karin H Humphries, Carolyn Gotay, Guillermo Mena-Sánchez, Jordi Salas-Salvadó, Ahmad Esmaillzadeh, Andrew Ignaszewski, Nizal Sarrafzadegan
Minerals play a major role in regulating cardiovascular function. Imbalances in electrolyte minerals are frequent and potentially hazardous occurrences that may lead to the development of cardiovascular diseases (CVDs). Transition metals, such as iron, zinc, copper and selenium, play a major role in cell metabolism. However, there is controversy over the effects of dietary and supplemental intake of these metals on cardiovascular risk factors and events. Since their pro-oxidant or antioxidant functions can have different effects on cardiovascular health...
December 13, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/29221896/correlative-imaging-reveals-physiochemical-heterogeneity-of-microcalcifications-in-human-breast-carcinomas
#3
Jennie A M R Kunitake, Siyoung Choi, Kayla X Nguyen, Meredith M Lee, Frank He, Daniel Sudilovsky, Patrick G Morris, Maxine S Jochelson, Clifford A Hudis, David A Muller, Peter Fratzl, Claudia Fischbach, Admir Masic, Lara A Estroff
Microcalcifications (MCs) are routinely used to detect breast cancer in mammography. Little is known, however, about their materials properties and associated organic matrix, or their correlation to breast cancer prognosis. We combine histopathology, Raman microscopy, and electron microscopy to image MCs within snap-frozen human breast tissue and generate micron-scale resolution correlative maps of crystalline phase, trace metals, particle morphology, and organic matrix chemical signatures within high grade ductal carcinoma in situ (DCIS) and invasive cancer...
December 5, 2017: Journal of Structural Biology
https://www.readbyqxmd.com/read/29209871/fe-ii-reduction-of-pyrolusite-%C3%AE-mno2-and-secondary-mineral-evolution
#4
Michael V Schaefer, Robert M Handler, Michelle M Scherer
Iron (Fe) and manganese (Mn) are the two most common redox-active elements in the Earth's crust and are well known to influence mineral formation and dissolution, trace metal sequestration, and contaminant transformations in soils and sediments. Here, we characterized the reaction of aqueous Fe(II) with pyrolusite (β-MnO2) using electron microscopy, X-ray diffraction, aqueous Fe and Mn analyses, and 57Fe Mössbauer spectroscopy. We reacted pyrolusite solids repeatedly with 3 mM Fe(II) at pH 7.5 to evaluate whether electron transfer occurs and to track the evolving reactivity of the Mn/Fe solids...
December 5, 2017: Geochemical Transactions
https://www.readbyqxmd.com/read/29199586/health-and-risk-assessment-by-icp-oes-of-heavy-metals-and-trace-minerals-in-commercial-mushrooms-marketed-in-china
#5
Mengyi Huang, Huansong Zeng, Baojun Xu
The objectives of this study were to investigate mineral profiles of 35 species of edible mushrooms collected in China; we compared nutritional values and tolerable values with the official recommended daily intakes (RDIs), maximum intake limits, and provisional tolerable weekly intakes. A total of 19 minerals were detected in edible mushrooms by inductively coupled plasma optical emission spectrometry. The results showed that the mushroom samples had a low percentage of RDI for the minerals calcium, iron, magnesium, manganese, zinc, potassium, and sodium and a relatively higher percentage of RDI for copper and molybdenum...
2017: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/29186932/ionic-substitutions-in-non-apatitic-calcium-phosphates
#6
REVIEW
Aleksandra Laskus, Joanna Kolmas
Calcium phosphate materials (CaPs) are similar to inorganic part of human mineralized tissues (i.e., bone, enamel, and dentin). Owing to their high biocompatibility, CaPs, mainly hydroxyapatite (HA), have been investigated for their use in various medical applications. One of the most widely used ways to improve the biological and physicochemical properties of HA is ionic substitution with trace ions. Recent developments in bioceramics have already demonstrated that introducing foreign ions is also possible in other CaPs, such as tricalcium phosphates (amorphous as well as α and β crystalline forms) and brushite...
November 27, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29184375/biochemical-analysis-of-some-serum-trace-elements-in-donkeys-and-horses-in-eastern-region-of-kingdom-of-saudi-arabia
#7
Turke Shawaf, Faisal Almathen, Ahmad Meligy, Wael El-Deeb, Shahab Al-Bulushi
Aim: Little is known about the serum levels of trace elements in donkeys and horses in Saudi Arabia. This study aimed to investigate the levels of some trace elements in these two species in the eastern region of Saudi Arabia and to compare the obtained results with the reference values. Materials and Methods: Seventeen Arabian horses and twenty eight Hassawi donkeys were randomly selected for this study. All of the studied healthy animals were kept under a uniform feeding protocol without any minerals supplementations...
October 2017: Veterinary World
https://www.readbyqxmd.com/read/29184025/microbial-community-structure-and-arsenic-biogeochemistry-in-two-arsenic-impacted-aquifers-in-bangladesh
#8
Edwin T Gnanaprakasam, Jonathan R Lloyd, Christopher Boothman, Kazi Matin Ahmed, Imtiaz Choudhury, Benjamin C Bostick, Alexander van Geen, Brian J Mailloux
Long-term exposure to trace levels of arsenic (As) in shallow groundwater used for drinking and irrigation puts millions of people at risk of chronic disease. Although microbial processes are implicated in mobilizing arsenic from aquifer sediments into groundwater, the precise mechanism remains ambiguous. The goal of this work was to target, for the first time, a comprehensive suite of state-of-the-art molecular techniques in order to better constrain the relationship between indigenous microbial communities and the iron and arsenic mineral phases present in sediments at two well-characterized arsenic-impacted aquifers in Bangladesh...
November 28, 2017: MBio
https://www.readbyqxmd.com/read/29179129/multivariate-statistical-analysis-to-characterize-discriminate-between-anthropogenic-and-geogenic-trace-elements-occurrence-in-the-campania-plain-southern-italy
#9
Gianluigi Busico, Emilio Cuoco, Nerantzis Kazakis, Nicolò Colombani, Micòl Mastrocicco, Dario Tedesco, Konstantinos Voudouris
Shallow aquifers are the most accessible reservoirs of potable groundwater; nevertheless, they are also prone to various sources of pollution and it is usually difficult to distinguish between human and natural sources at the watershed scale. The area chosen for this study (the Campania Plain) is characterized by high spatial heterogeneities both in geochemical features and in hydraulic properties. Groundwater mineralization is driven by many processes such as, geothermal activity, weathering of volcanic products and intense human activities...
November 24, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29174594/prediction-of-filamentous-process-performance-attributes-by-csl-quality-assessment-using-mid-infrared-spectroscopy-and-chemometrics
#10
Alexandra Hofer, Donya Kamravamanesh, Judit Bona-Lovasz, Andreas Limbeck, Bernhard Lendl, Christoph Herwig, Jens Fricke
Every biopharmaceutical production process aims for control strategies to achieve process robustness in order to ensure consistent product quality. Process variability can origin from process parameters, the biological nature as well as from high lot-to-lot variability of raw materials. In filamentous processes raw materials with very complex matrices, such as corn steep liquor (CSL), are used, which are especially challenging to characterize. In this study, CSL was characterized in detail for its ingredients presenting an overall composition of its matrix of 50 analyzed components (19 amino acids, 5 organic acids, 8 reducing sugars, 7 water-soluble vitamins and 11 trace elements/minerals) in order to facilitate analytical reduction to fingerprinting methods FT-MIR was evaluated as fast and non-destructive spectroscopic fingerprinting method for adequate assessment of CSL quality...
November 23, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/29174274/effects-of-placentophagy-on-maternal-salivary-hormones-a-pilot-trial-part-1
#11
Sharon M Young, Laura K Gryder, Chad Cross, David Zava, David W Kimball, Daniel C Benyshek
BACKGROUND: Recent studies show that human placenta, processed and encapsulated for postpartum consumption, contains a host of trace minerals and hormones that could conceivably affect maternal physiology. Our objective was to investigate whether salivary hormone concentrations of women ingesting their own encapsulated placenta during the early postpartum differed from those of women consuming a placebo. METHODS: Randomly assigned participants (N=27) were given a supplement containing either their dehydrated and homogenized placenta (n=12), or placebo (n=15)...
November 23, 2017: Women and Birth: Journal of the Australian College of Midwives
https://www.readbyqxmd.com/read/29173479/trace-elements-in-struvite-equine-enteroliths-concentration-speciation-and-influence-of-diet
#12
Ashaki A Rouff, George A Lager, Dayana Arrue, John Jaynes
Equine enteroliths ∼1.5cm in diameter were collected from an Arabian horse in Louisville, Kentucky, United States. Scanning electron microscopy (SEM) and light microscope imaging of a sectioned enterolith showed two distinct regions of concentric growth outward from the central nidus, a small pebble. After initial growth, acidic colonic fluids permeated the stone inducing recrystallization and alteration of crystals closest to the nidus. A second growth event, when mineral crystallization was again favorable, produced an outer region of unaltered crystals at the rim...
January 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29173470/effect-of-long-term-aerobic-anaerobic-and-aerobic-anaerobic-physical-training-in-seric-toxic-minerals-concentrations
#13
Marcos Maynar-Mariño, Francisco Llerena, Ignacio Bartolomé, Carmen Crespo, Diego Muñoz, María-Concepción Robles, María-Jesús Caballero
BACKGROUND: Many substances poured out from industries can be toxic to humans and can impair physical performance. Besides, physical training may modify the body concentrations of these substances as a result of physiological adaptations. OBJECTIVES: The aim of the study was to determine if different modalities of exercise might affect serum concentrations of toxic trace elements in sportsmen. METHODS: 80 Spanish national sportsmen were recruited before the start of their training period...
January 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29154121/trace-elements-in-the-liver-of-captive-and-free-ranging-european-bison-bison-bonasus-l
#14
Maciej Durkalec, Agnieszka Nawrocka, Michał Krzysiak, Magdalena Larska, Mirosława Kmiecik, Andrzej Posyniak
European bison is classified as a vulnerable species because of many threats. We analyzed the content of toxic and essential elements (Ag, Al, As, Ba, Be, Cd, Co, Cr, Cu, Hg, Mg, Mn, Na, Ni, Pb, Se, Th, Tl, U, V, and Zn) in the livers of 30 captive and free-ranging European bison from the Bison Breeding Center in Smardzewice and from Białowieża Primeval Forest in Poland. The contents of toxic elements were lower than reported previously in European Bison and were similar to those of wild ungulates from non-polluted areas...
November 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/29153878/extensive-processing-of-sediment-pore-water-dissolved-organic-matter-during-anoxic-incubation-as-observed-by-high-field-mass-spectrometry-fticr-ms
#15
Juliana Valle, Michael Gonsior, Mourad Harir, Alex Enrich-Prast, Philippe Schmitt-Kopplin, David Bastviken, Ralf Conrad, Norbert Hertkorn
Dissolved organic matter (DOM) contained in lake sediments is a carbon source for many microbial degradation processes, including aerobic and anaerobic mineralization. During anaerobic degradation, DOM is partially consumed and transformed into new molecules while the greenhouse gases methane (CH4) and carbon dioxide (CO2) are produced. In this study, we used ultrahigh resolution mass spectrometry to trace differences in the composition of solid-phase extractable (PPL resin) pore water DOM (SPE-DOM) isolated from surface sediments of three boreal lakes before and after 40 days of anoxic incubation, with concomitant determination of CH4 and CO2 evolution...
November 7, 2017: Water Research
https://www.readbyqxmd.com/read/29153160/a-100-year-review-calf-nutrition-and-management
#16
A F Kertz, T M Hill, J D Quigley, A J Heinrichs, J G Linn, J K Drackley
The first calf paper, published in the May 1919 issue of the Journal of Dairy Science (JDS), described factors affecting birth body weight of different breeds of calves. Other studies were done on nonmilk ingredients, growth charts were developed, and early weaning was followed to conserve milk fed to calves. Calf papers did not report use of statistics to control or record variation or to determine whether treatment means were different. Many experiments were more observational than comparative. Typically fewer than 5 calves, and sometimes 1 or 2 calves, were used per treatment...
December 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29151407/minerals-and-trace-elements-in-milk-milk-products-infant-formula-and-adult-pediatric-nutritional-formula-icp-ms-method-collaborative-study-aoac-final-action-2015-06-iso-dis-21424-idf-243
#17
Lawrence H Pacquette, Joseph J Thompson
AOAC Final Action Official Method(SM)2015.06 “Minerals and Trace Elements in Milk, Milk Products, Infant Formula and Adult/Pediatric Nutritional Formula, ICP-MS Method” was collaboratively studied. Note that “milk, milk products” has now been added to the title of the Final Action method because whole milk and several dairy ingredients were successfully incorporated into the collaborative study for the purpose of developing an International Organization for Standardization/International Dairy Federation standard (ISO/DIS 21424; in progress)...
November 20, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/29141052/association-between-urinary-manganese-and-blood-pressure-results-from-national-health-and-nutrition-examination-survey-nhanes-2011-2014
#18
Cynthia Wu, Jessica G Woo, Nanhua Zhang
Manganese is a trace mineral required for metabolism, growth and tissue formation, and reproduction. It is mainly obtained through food and water, as well as through occupational exposure. This study used data from National Health and Nutrition Examination Survey, combining the 2011-12 and 2013-14 cycles. We conducted linear regression analyses on urinary manganese and blood pressure. Significant negative associations (p<0.01) between urinary manganese and both systolic and diastolic blood pressure existed after adjusting for age, sex, body mass index, race/ethnicity, and status of taking antihypertensive medication...
2017: PloS One
https://www.readbyqxmd.com/read/29128766/low-biodegradability-of-dissolved-organic-matter-and-trace-metals-from-subarctic-waters
#19
Olga V Oleinikova, Liudmila S Shirokova, Olga Y Drozdova, Sergey A Lapitskiy, Oleg S Pokrovsky
The heterotrophic mineralization of dissolved organic matter (DOM) controls the CO2 flux from the inland waters to the atmosphere, especially in the boreal waters, although the mechanisms of this process and the fate of trace metals associated with DOM remain poorly understood. We studied the interaction of culturable aquatic (Pseudomonas saponiphila) and soil (Pseudomonas aureofaciens) Gammaproteobacteria with seven different organic substrates collected in subarctic settings. These included peat leachate, pine crown throughfall, fen, humic lake, stream, river, and oligotrophic lake with variable dissolved organic carbon (DOC) concentrations (from 4 to 60mgL(-1))...
November 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29126009/characteristics-and-origin-of-agates-from-p%C3%A5-%C3%A3-czki-g%C3%A3-rne-lower-silesia-poland-a-combined-microscopic-micro-raman-and-cathodoluminescence-study
#20
Magdalena Dumańska-Słowik, Tomasz Powolny, Magdalena Sikorska-Jaworowska, Adam Gaweł, Lucyna Kogut, Krzysztof Poloński
Agates from Płóczki Górne hosted by Permian basaltic rocks are predominantly made of length-fast chalcedony, and subordinately megaquartz and quartzine. Moganite occurs in traces mainly in transparent, outer, darker regions of white-grey coloured agates. Silica matrix of agates comprises a wide variety of solid inclusions represented by celadonite, plagioclases, hematite, goethite, barite, calcite, heulandite-clinoptyloite, nontronite-saponite, and Mn-dioxides (ramsdellite). Mineral phases are locally accompanied by black aggregations of carbonaceous matter, which gives a Raman signature of disordered carbon...
November 7, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
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