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https://www.readbyqxmd.com/read/28734258/mechanical-properties-and-biocompatibility-of-porous-titanium-scaffolds-for-bone-tissue-engineering
#1
Yunhui Chen, Jessica Ellen Frith, Ali Dehghan-Manshadi, Hooyar Attar, Damon Kent, Nicolas Dominique Mathieu Soro, Michael J Bermingham, Matthew S Dargusch
Synthetic scaffolds are a highly promising new approach to replace both autografts and allografts to repair and remodel damaged bone tissue. Biocompatible porous titanium scaffold was manufactured through a powder metallurgy approach. Magnesium powder was used as space holder material which was compacted with titanium powder and removed during sintering. Evaluation of the porosity and mechanical properties showed a high level of compatibility with human cortical bone. Interconnectivity between pores is higher than 95% for porosity as low as 30%...
July 13, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28732315/total-and-ionized-magnesium-testing-in-the-surgical-intensive-care-unit-opportunities-for-improved-laboratory-and-pharmacy-utilization
#2
Daniel Dante Yeh, Nalin Chokengarmwong, Yuchiao Chang, Liyang Yu, Colleen Arsenault, Joseph Rudolf, Elizabeth Lee-Lewandrowski, Kent Lewandrowski
PURPOSE: Ionized fraction (iMg) is the physiologically active form of magnesium (Mg); total Mg may not accurately reflect iMg status. Erroneously "low" Mg levels may result in unnecessary repetitive testing. MATERIALS AND METHODS: From 11/2015 to 01/2016, patients ordered for Mg from a pilot ICU also had iMg tested. Weighted kappa statistic was used to assess agreement between Mg categories (low, normal, high). Predictors of unnecessary repeated Mg testing and repletion using data were explored through logistic regression models using GEE techniques to account for repeated measurements in both bivariate and multivariable analyses...
July 11, 2017: Journal of Critical Care
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/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
#5
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
#6
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/28707468/prediction-of-novel-high-pressure-structures-of-magnesium-niobium-dihydride
#7
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/28704427/the-influence-of-human-exploration-on-the-microbial-community-structure-and-ammonia-oxidizing-potential-of-the-su-bentu-limestone-cave-in-sardinia-italy
#8
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/28702941/an-application-of-partial-least-squares-for-identifying-dietary-patterns-in-bone-health
#9
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
https://www.readbyqxmd.com/read/28702280/dissecting-limiting-factors-of-the-protein-synthesis-using-recombinant-elements-pure-system
#10
Jun Li, Chi Zhang, Poyi Huang, Erkin Kuru, Eliot T C Forster-Benson, Taibo Li, George M Church
Reconstituted cell-free protein synthesis systems such as the Protein synthesis Using Recombinant Elements (PURE) system give high-throughput and controlled access to in vitro protein synthesis. Here we show that compared with the commercial S30 crude extract based RTS 100 E. coli HY system, the PURE system has less mRNA degradation and produces up to ∼6-fold full-length proteins. However the majority of polypeptides PURE produces are partially translated or inactive since the signal from firefly luciferase (Fluc) translated in PURE is only ∼2/3(rd) of that measured using the RTS 100 E...
2017: Translation
https://www.readbyqxmd.com/read/28701779/clustering-on-magnesium-surfaces-formation-and-diffusion-energies
#11
Haijian Chu, Hanchen Huang, Jian Wang
The formation and diffusion energies of atomic clusters on Mg surfaces determine the surface roughness and formation of faulted structure, which in turn affect the mechanical deformation of Mg. This paper reports first principles density function theory (DFT) based quantum mechanics calculation results of atomic clustering on the low energy surfaces {0001} and [Formula: see text]. In parallel, molecular statics calculations serve to test the validity of two interatomic potentials and to extend the scope of the DFT studies...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28692891/degradation-studies-of-quizalofop-p-and-related-compounds-in-soils-using-liquid-chromatography-coupled-to-low-and-high-resolution-mass-analyzers
#12
Rosalía López-Ruiz, Roberto Romero-González, José Luis Martínez Vidal, Manuel Fernández-Pérez, Antonia Garrido Frenich
A comprehensive degradation study of quizalofop-p, quizalofop-p-ethyl, quizalofop-p-tefuryl and propaquizafop in soil samples have been firstly performed using ultra high performance liquid chromatography coupled to Orbitrap mass spectrometry (UHPLC-Orbitrap-MS). Thus, metabolites or degradation products, such as CHHQ (dihydroxychloroquinoxalin), CHQ (6-chloroquinoxalin-2-ol), PPA ((R)-2-(4-hydroxyphenoxy)propionic acid) and 2,3-dihydroxyquinoxaline were also monitored. An extraction procedure based on QuEChERS procedure was used...
July 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28692411/evaluation-of-the-health-benefits-of-a-multivitamin-multimineral-herbal-essential-oil-infused-supplement-a-pilot-trial
#13
Xuesheng Han, Dennis L Eggett, Tory L Parker
This study was designed to quantitatively evaluate the health benefits of a multivitamin, multimineral, herbal, essential oil-infused supplement using serum biomarkers. We also qualitatively evaluated the health effects of this supplement using a survey. Sixteen participants were recruited to take the supplement as directed for two months. The levels of the following serum components were measured in the participants: total cholesterol, high-density lipoprotein (HDL) cholesterol, low-density lipoprotein (LDL) cholesterol, triglycerides, lipoprotein(a), LDL/HDL cholesterol ratio, total/HDL cholesterol ratio, ferritin, fibrinogen, C-reactive protein, insulin, testosterone, sex hormone binding globulin, free androgen index, red blood cell magnesium, homocysteine, coenzyme Q10, lipid peroxides, alpha-tocopherol, gamma-tocopherol, cardiovascular index, eicosapentaenoic acid (EPA), arachidonic acid (AA), and the AA/EPA ratio...
July 10, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28691718/additive-and-antagonistic-antinociceptive-interactions-between-magnesium-sulfate-and-ketamine-in-the-rat-formalin-test
#14
Katarina Savić Vujović, Sonja Vučković, Dolika Vasović, Branislava Medić, Nick Knežević, Milica Prostran
Because ketamine and magnesium block NMDA receptor activation by distinct mechanisms of action, we hypothesized that in a model of inflammatory pain in rats the combination of ketamine and magnesium might be more effective than ketamine alone. Antinociceptive activity was assessed by the formalin test in male Wistar rats (200-250 g). Animals were injected with 100 μL of 2.5% formalin to the plantar surface of the right hind paw. Data were recorded as the total time spent in pain-related behavior after the injection of formalin or vehicle (0...
2017: Acta Neurobiologiae Experimentalis
https://www.readbyqxmd.com/read/28689331/pathophysiology-and-current-clinical-management-of-preeclampsia
#15
REVIEW
Lorena M Amaral, Kedra Wallace, Michelle Owens, Babbette LaMarca
Preeclampsia is characterized by blood pressure greater than 140/90 mmHg in the second half of pregnancy. This disease is a major contributor to preterm and low birth weight babies. The early delivery of the baby, which becomes necessary for maintaining maternal well-being, makes preeclampsia the leading cause for preterm labor and infant mortality and morbidity. Currently, there is no cure for this pregnancy disorder. The current clinical management of PE is hydralazine with labetalol and magnesium sulfate to slow disease progression and prevent maternal seizure, and hopefully prolong the pregnancy...
August 2017: Current Hypertension Reports
https://www.readbyqxmd.com/read/28689149/the-response-of-soil-and-stream-chemistry-to-decreases-in-acid-deposition-in-the-catskill-mountains-new-york-usa
#16
Michael R McHale, Douglas A Burns, Jason Siemion, Michael R Antidormi
The Catskill Mountains have been adversely impacted by decades of acid deposition, however, since the early 1990s, levels have decreased sharply as a result of decreases in emissions of sulfur dioxide and nitrogen oxides. This study examines trends in acid deposition, stream-water chemistry, and soil chemistry in the southeastern Catskill Mountains. We measured significant reductions in acid deposition and improvement in stream-water quality in 5 streams included in this study from 1992 to 2014. The largest, most significant trends were for sulfate (SO4(2-)) concentrations (mean trend of -2...
July 6, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28683422/ionized-magnesium-in-plasma-and-erythrocytes-for-the-assessment-of-low-magnesium-status-in-alcohol-dependent-patients
#17
Michal Ordak, Magdalena Maj-Zurawska, Halina Matsumoto, Magdalena Bujalska-Zadrozny, Ilona Kieres-Salomonski, Tadeusz Nasierowski, Elzbieta Muszynska, Marcin Wojnar
BACKGROUND: Studies on the homeostasis of magnesium in alcohol-dependent patients have often been characterized by low hypomagnesemia detection rates. This may be due to the fact that the content of magnesium in blood serum constitutes only 1% of the average magnesium level within the human body. However, the concentration of ionized magnesium is more physiologically important and makes up 67% of the total magnesium within a human organism. There are no data concerning the determination of the ionized fraction of magnesium in patients addicted to alcohol and its influence on mental health status...
June 24, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28682182/low-25-hydroxyvitamin-d-and-myofascial-pain-association-of-cancer-colon-polyps-and-tendon-rupture
#18
Jane M Hightower, Kathie M Dalessandri, Karl Pope, Germán T Hernández
BACKGROUND: Myofascial pain that has been associated with cancer and increased risk of morbidity and mortality in cancer patients is intrinsically associated with low magnesium and low 25-hydroxyvitamin D (25(OH)D). Therefore, this physical finding was used as a clinical diagnostic proxy. OBJECTIVE: The objective of this study was to assess the association and prevalence of disease in individuals with myofascial pain and low 25(OH)D in a county with low magnesium in the drinking water...
July 6, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28680642/long-lasting-response-to-oral-therapy-in-a-young-male-with-monogenic-diabetes-as-part-of-hnf1b-related-disease
#19
Elena Carrillo, Amparo Lomas, Pedro J Pinés, Cristina Lamas
Mutations in hepatocyte nuclear factor 1β gene (HNF1B) are responsible for a multisystemic syndrome where monogenic diabetes (classically known as MODY 5) and renal anomalies, mostly cysts, are the most characteristic findings. Urogenital malformations, altered liver function tests, hypomagnesemia or hyperuricemia and gout are also part of the syndrome. Diabetes in these patients usually requires early insulinization. We present the case of a young non-obese male patient with a personal history of renal multicystic dysplasia and a debut of diabetes during adolescence with simple hyperglycemia, negative pancreatic autoimmunity and detectable C-peptide levels...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28680143/fabrication-of-single-crystal-gallium-phosphide-thin-films-on-glass
#20
Hal Emmer, Christopher T Chen, Rebecca Saive, Dennis Friedrich, Yu Horie, Amir Arbabi, Andrei Faraon, Harry A Atwater
Due to its high refractive index and low absorption coefficient, gallium phosphide is an ideal material for photonic structures targeted at the visible wavelengths. However, these properties are only realized with high quality epitaxial growth, which limits substrate choice and thus possible photonic applications. In this work, we report the fabrication of single crystal gallium phosphide thin films on transparent glass substrates via transfer bonding. GaP thin films on Si (001) and (112) grown by MOCVD are bonded to glass, and then the growth substrate is removed with a XeF2 vapor etch...
July 5, 2017: Scientific Reports
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