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Magnesium

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https://www.readbyqxmd.com/read/28719138/chevrel-phase-mo6-t8-t-s-se-as-electrodes-for-advanced-energy-storage
#1
REVIEW
Lin Mei, Jiantie Xu, Zengxi Wei, Huakun Liu, Yutao Li, Jianmin Ma, Shixue Dou
With the large-scale applications of electric vehicles in recent years, future batteries are required to be higher in power and possess higher energy densities, be more environmental friendly, and have longer cycling life, lower cost, and greater safety than current batteries. Therefore, to develop alternative electrode materials for advanced batteries is an important research direction. Recently, the Chevrel phase Mo6 T8 (T = S, Se) has attracted increasing attention as electrode candidate for advanced batteries, including monovalent (e...
July 18, 2017: Small
https://www.readbyqxmd.com/read/28717409/influence-of-the-microstructure-and-silver-content-on-degradation-cytocompatibility-and-antibacterial-properties-of-magnesium-silver-alloys-in-vitro
#2
Zhidan Liu, Ronald Schade, Bérengère Luthringer, Norbert Hort, Holger Rothe, Sören Müller, Klaus Liefeith, Regine Willumeit-Römer, Frank Feyerabend
Implantation is a frequent procedure in orthopedic surgery, particularly in the aging population. However, it possesses the risk of infection and biofilm formation at the surgical site. This can cause unnecessary suffering to patients and burden on the healthcare system. Pure Mg, as a promising metal for biodegradable orthopedic implants, exhibits some antibacterial effects due to the alkaline pH produced during degradation. However, this antibacterial effect may not be sufficient in a dynamic environment, for example, the human body...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28714170/safety-and-efficacy-of-low-dose-intramuscular-magnesium-sulphate-mgso4-compared-to-intravenous-regimen-for-treatment-of-eclampsia
#3
Pradip Kumar Saha, Jasbinder Kaur, Poonam Goel, Shalija Kataria, Rimpy Tandon, Lekha Saha
AIM: This study was performed to compare the safety and efficacy of low dose intramuscular magnesium sulphate (MgSO4) (Dhaka regimen) and intravenous (IV) MgSO4 (Zuspan regimen) for the prevention of eclampsia recurrence and to compare serum magnesium concentration. METHODS: Forty one eligible patients with eclampsia were randomly divided into two groups: group I patients received IV MgSO4 according to the Zuspan regime, while group II patients received intramuscular (IM) MgSO4 according to the Dhaka regimen (i...
July 16, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28714118/body-wall-structure-in-the-starfish-asterias-rubens
#4
Liisa M Blowes, Michaela Egertová, Yankai Liu, Graham R Davis, Nick J Terrill, Himadri S Gupta, Maurice R Elphick
The body wall of starfish is composed of magnesium calcite ossicles connected by collagenous tissue and muscles and it exhibits remarkable variability in stiffness, which is attributed to the mechanical mutability of the collagenous component. Using the common European starfish Asterias rubens as an experimental animal, here we have employed a variety of techniques to gain new insights into the structure of the starfish body wall. The structure and organisation of muscular and collagenous components of the body wall were analysed using trichrome staining...
July 16, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28714024/magnesium-isoglycyrrhizinate-protects-against-renal%C3%A2-ischemia%C3%A2-reperfusion-injury-in-a-rat-model-via-anti%C3%A2-inflammation-anti%C3%A2-oxidation-and-anti%C3%A2-apoptosis
#5
Zhigang Zhao, Zhongzhi Tang, Wenkai Zhang, Jie Liu, Bo Li
The present study aimed to investigate whether magnesium isoglycyrrhizinate protects against renal ischemia‑reperfusion injury (RIRI), and to verify the underlying mechanisms. An RIRI rat model was induced by removing the right kidney, and exposing and clamping the left kidney. RIRI model rats were administered 30 mg/kg magnesium isoglycyrrhizinate for 3 days. Blood urea nitrogen (BUN) and serum creatinine levels in the blood of RIRI model rat were examined, compared with sham‑operated controls. Magnesium isoglycyrrhizinate suppressed the activities of tumor necrosis factor‑α, interleukin (IL)‑1β, IL‑6, superoxide dismutase, glutathione peroxidase, inducible nitric oxide synthase (iNOS) and caspase‑3 in RIRI model rats...
July 15, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28711997/effects-of-degradable-osteosynthesis-plates-of-mgyrezr-alloy-on-cell-function-of-human-osteoblasts-fibroblasts-and-osteosarcoma-cells
#6
Hendrik Naujokat, Aydin Gülses, Jörg Wiltfang, Yahya Açil
The aim was to evaluate the biocompatibility of osteosynthesis plates of the MgYREZr/WE43 alloy by using human cells in vitro. Eluates of degradable magnesium osteosynthesis plates as well as halved plates were used for incubation with human osteoblasts, fibroblasts and osteosarcoma cells. The cell viability was evaluated by using FDA/PI-Staining and LDH analysis. Cell proliferation was assessed by MTT, WST-Test and BrdU-ELISA. Scanning electron microscope was used for investigation of the cell adhesion. The number of devitalized cells in all treatment groups did not significantly deviate from the control group...
August 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28711425/minerals-and-sarcopenia-the-role-of-calcium-iron-magnesium-phosphorus-potassium-selenium-sodium-and-zinc-on-muscle-mass-muscle-strength-and-physical-performance-in-older-adults-a%C3%A2-systematic-review
#7
REVIEW
Carliene van Dronkelaar, Aafke van Velzen, Maya Abdelrazek, Anouk van der Steen, Peter J M Weijs, Michael Tieland
INTRODUCTION: Minerals may contribute to prevent and treat sarcopenia, the age-related loss of muscle mass, muscle strength, and physical performance. So far, there is no comprehensive review on the impact of minerals on sarcopenia outcomes. The aim of this systematic review is to evaluate the role of calcium, iron, magnesium, phosphorus, potassium, selenium, sodium, and zinc on muscle mass, muscle strength, and physical performance in older adults. METHODS: A systematic search was conducted between March 2016 and July 2016, in the PubMed database using predefined search terms...
July 12, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28711248/the-effect-of-source-of-supplemental-dietary-calcium-and-magnesium-in-the-peripartum-period-and-level-of-dietary-magnesium-postpartum-on-mineral-status-performance-and-energy-metabolites-in-multiparous-holstein-cows
#8
B M Leno, S E LaCount, C M Ryan, D Briggs, M Crombie, T R Overton
The objective of this study was to determine the effects of feeding different supplemental sources of Ca and Mg in the peripartum period, and different dietary levels of Mg postpartum, on plasma mineral status, performance, and aspects of energy metabolism in transition dairy cows. Multiparous Holstein cows (n = 41) were used in a completely randomized design with a 2 × 2 factorial arrangement of treatments starting at 28 d before expected parturition. Main effects were source assignments (CS = common sources of supplemental Ca and Mg, or MA = a blend of common and commercial mineral sources with supplemental minerals primarily from a commercial Ca-Mg dolomite source; MIN-AD, Papillon Agricultural Company Inc...
July 12, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28710691/monitoring-of-inland-waters-for-culturing-shrimp-litopenaeus-vannamei-application-of-a-method-based-on-survival-and-chemical-composition
#9
G Valencia-Castañeda, M I Millán-Almaraz, J F Fierro-Sañudo, M G Fregoso-López, F Páez-Osuna
This study evaluated the suitability of 21 inland waters (16 well waters and 5 surface waters) from Northwest Mexico via short- (48 h) and medium-term (28 days) tests using postlarvae (PL18) of Litopenaeus vannamei. In the short test, survival was assessed at 48 h after shrimp were placed in groups of 10 postlarvae into 2-L containers of inland water, to which they had been previously acclimated. The second, medium-term test consisted of four replicates with 10 postlarvae, and each group was placed in 15-L containers with the treatment water...
August 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28709074/increased-methane-production-in-cyanobacteria-and-methanogenic-microbe-co-cultures
#10
Tracey Yeung, Matthew Kwan, Lewis Adler, Toby J Mills, Brett A Neilan, Gavin Conibeer, Robert Patterson
A novel light-to-bioenergy system produced 3.5 times the baseline methane output using a co-culture of cyanobacteria (Oscillatoria sp.) and a methanogenic microbial community. Analysis of micronutrients in the system during the growth phase indicated that cobalt, iron, nickel and zinc were not appreciably consumed. The stable consumption and return of macronutrients calcium and magnesium were also observed. Essential macronutrients nitrogen, in the form of nitrate, and phosphorus showed no cycling during the growth phase and were depleted at rates of 0...
June 24, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28709026/regulation-of-calcium-and-magnesium-homeostasis-in-plants-from-transporters-to-signaling-network
#11
REVIEW
Ren-Jie Tang, Sheng Luan
Calcium (Ca(2+)) and magnesium (Mg(2+)) are the most abundant divalent cations in plants. As a nutrient and a signaling ion, Ca(2+) levels in the cell are tightly controlled by an array of channels and carriers that provide mechanistic basis for Ca(2+) homeostasis and the generation of Ca(2+) signals. Although a family of CorA-type Mg(2+) transporters plays a key role in controlling Mg(2+) homeostasis in plants, more components are yet to be identified. Ca(2+) and Mg(2+) appear to have antagonistic interactions in plant cells, and therefore plants depend on a homeostatic balance between Ca(2+) and Mg(2+) for optimal growth and development...
July 11, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28708577/a-one-year-review-of-eclampsia-in-an-ethiopian-tertiary-care-center-saint-paul-s-hospital-millennium-medical-college-sphmmc
#12
Thomas Mekuria, Abdulfetah Abdosh
Eclampsia remains one of the five major causes of maternal mortality in developing countries. Advances in diagnosis and management have led to a significant reduction in maternal mortality and morbidity from this disease in developed countries. In developing countries the incidence of maternal death attributed to eclampsia remains high and, in Ethiopia, maternal mortality from this complication has instead risen over the last decade. The purpose of this study was to review the incidence of eclampsia at the largest feto-maternal center in the country over 1 year in an attempt to determine what quality improvement measures are needed and could realistically be implemented within the system to decrease this complication...
July 14, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28708214/hypomagnesemia-and-cause-specific-mortality-in-hemodialysis-patients-5-year-follow-up-analysis
#13
Gjulsen N Selim, Goce Spasovski, Liljana Tozija, Ljubica Georgievska-Ismail, Beti Zafirova-Ivanovska, Jelka Masin-Spasovska, Irena Rambabova-Busletic, Zvezdana Petronijevic, Pavlina Dzekova-Vidimliski, Vesna Ristovska, Vladimir Pusevski, Olivera Stojceva-Taneva
INTRODUCTION: The aim of this prospective study was to evaluate the association between serum magnesium (Mg) and mortality, in particular the cause-specific mortality of Mg and other risk factors in hemodialysis (HD) patients. METHODS: We studied a cohort of 185 HD patients receiving thrice-weekly HD treatment, on a dialysate Mg concentration of 0.5 mmol/L. We stratified 3 patient groups according to the level of Mg: lower (<1.1 mmol/L), intermediate-reference (1...
July 1, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28707468/prediction-of-novel-high-pressure-structures-of-magnesium-niobium-dihydride
#14
Chuan-Zhao Zhang, Guoliang Sun, Jingjing Wang, Cheng Lu, Yuan-Yuan Jin, Xiaoyu Kuang, Andreas Hermann
Based on a combination of the particle-swarm optimization technique and density functional theory (DFT), we explore the crystal structures of MgH2, NbH2 and MgNbH2 under high pressure. The enthalpy-pressure (H-P) diagrams indicate that the structural transition sequence of MgH2 is α → γ → δ → ε → ζ phase and NbH2 transforms from the Fm-3m phase to the Pnma phase at 47.80 GPa. However, MgNbH2 is unstable when the pressure is too low or too high. Two novel MgNbH2 structures, the hexagonal P-6m2 phase and the orthorhombic Cmcm phase, are discovered, which are stable in the pressure ranges of 13...
July 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28704775/evaluating-the-reinforcement-content-and-elastic-properties-of-mg-based-composites-using-dual-mode-ultrasonic-velocities
#15
Yu Liu, Yongfeng Song, Xiongbing Li, Chao Chen, Kechao Zhou
Based on the wave-mode-converted principle, an immersion-focused transducer is employed to determine the longitudinal wave and shear wave velocities. The experimental condition is then investigated to obtain the converted shear wave, which is used to analyze the relationship between the reinforcement content and the dual-mode ultrasonic velocities. In addition, the elastic modulus is calculated. Magnesium-based composite samples with different reinforcement contents are manufactured to conduct an ultrasonic experiment, wherein the dual-mode velocities vary with the change in the reinforcement content; the correlation coefficient is 99...
July 4, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28704427/the-influence-of-human-exploration-on-the-microbial-community-structure-and-ammonia-oxidizing-potential-of-the-su-bentu-limestone-cave-in-sardinia-italy
#16
Stefan Leuko, Kaisa Koskinen, Laura Sanna, Ilenia M D'Angeli, Jo De Waele, Paolo Marcia, Christine Moissl-Eichinger, Petra Rettberg
The bacterial diversity in the Su Bentu Cave in Sardinia was investigated by means of 16S rRNA gene-based analysis. This 15 km long cave, carved in Jurassic limestone, hosts a variety of calcite speleothems, and a long succession of subterranean lakes with mixed granite and carbonate sands. The lower level is occasionally flooded by a rising groundwater level, but with only scarce input of organic remains (leaves and charcoal fragments). On the quiet cave pools there are visible calcite rafts, whereas walls are locally coated with manganese deposits...
2017: PloS One
https://www.readbyqxmd.com/read/28703789/capturing-suboptical-dynamic-structures-in-lipid-bilayer-patches-formed-from-free-standing-giant-unilamellar-vesicles
#17
Tripta Bhatia, Flemming Cornelius, John H Ipsen
There is accumulating evidence that the small-scale lateral organization of biological membranes has a crucial role in signaling and trafficking in cells. However, it has been difficult to characterize these features with existing methods for preparing and analyzing freestanding membranes, because the dynamics occurs below the optical resolution possible with these protocols. We have developed a protocol that permits the imaging of lipid nanodomains and lateral protein organization in membranes of giant unilamellar vesicles (GUVs)...
August 2017: Nature Protocols
https://www.readbyqxmd.com/read/28703019/effectiveness-and-safety-of-magnesium-replacement-in-critically-ill-patients-admitted-to-the-medical-intensive-care-unit-in-an-academic-medical-center-a-retrospective-cohort-study
#18
Drayton A Hammond, Jelena Stojakovic, Niranjan Kathe, Julie Tran, Oktawia A Clem, Kristina Erbach, Jarrod King
BACKGROUND: "Rules of thumb" for the replacement of electrolytes, including magnesium, in critical care settings are used, despite minimal empirical validation of their ability to achieve a target serum concentration. This study's purpose was to evaluate the effectiveness and safety surrounding magnesium replacement in medically, critically ill patients with mild-to-moderate hypomagnesemia. METHODS: This was a single-center, retrospective, observational evaluation of episodes of intravenous magnesium replacement ordered for patients with mild-to-moderate hypomagnesemia (1...
January 1, 2017: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/28702984/regenerative-medicine-in-the-treatment-of-gastro-esophageal-reflux-disease-and-laryngo-pharyngeal-reflux-from-research-to-cure
#19
S E Aragona, G Mereghetti, M Bianchetti, B Mangiavillano, T Zurlo, J Lotti, I La Mantia, K França, T Lotti
We present our observational study on 40 patients treated with the Hana medical device that releases magnesium alginate, performing a lubricating and hydrating action. This device is in the form of a gel, with topical action to contrast gastroesophageal reflux and to exert a mechanical role of protection of the mucosal tissues (mouth-pharyngo-esophageal mucosa and gastric mucose.). Forty patients were recruited aged between 22- and 72-years-old with painful dyspeptic Gastro Esophageal Reflux Disease (GERD) symptomatology in acute or in clinical phase (25 patients) and with pharyngo-laryngo-tracheal symptomatology (15 patients)...
July 13, 2017: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28702941/an-application-of-partial-least-squares-for-identifying-dietary-patterns-in-bone-health
#20
Tiffany C Yang, Lorna S Aucott, Garry G Duthie, Helen M Macdonald
In a large cohort of older women, a mechanism-driven statistical technique for assessing dietary patterns that considers a potential nutrient pathway found two dietary patterns associated with lumbar spine and femoral neck bone mineral density. A "healthy" dietary pattern was observed to be beneficial for bone mineral density. INTRODUCTION: Dietary patterns represent a broader, more realistic representation of how foods are consumed, compared to individual food or nutrient analyses. Partial least-squares (PLS) is a data-reduction technique for identifying dietary patterns that maximizes correlation between foods and nutrients hypothesized to be on the path to disease, is more hypothesis-driven than previous methods, and has not been applied to the study of dietary patterns in relation to bone health...
December 2017: Archives of Osteoporosis
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