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https://www.readbyqxmd.com/read/28938178/fabrication-of-mesoporous-magnesium-oxide-nanosheets-using-magnesium-powder-and-their-excellent-adsorption-of-ni-ii
#1
Jing Feng, Mingming Gao, Zhiqiang Zhang, Shengna Liu, Xinyu Zhao, Yueming Ren, Yanzhuo Lv, Zhuangjun Fan
Mesoporous MgO nanosheets with a high adsorption rate and excellent adsorption capacity for removing Ni (II) were successfully synthesized by a hydrothermal and annealing method. The Mg(OH)2 was first synthesized by a hydrothermal process using magnesium powder as the starting material. MgO was then obtained by annealing the as-prepared Mg(OH)2 at 450°C. The advantage of the magnesium powder as the starting material is it slowly generated Mg(2+). Thus, the low centration of Mg(2+) guaranteed a slow rate of forming Mg(OH)2, which benefited with a mesoporous structure...
September 14, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28933814/the-effect-of-concentration-on-the-electrochemistry-and-speciation-of-the-magnesium-aluminum-chloride-complex-electrolyte-solution
#2
Kimberly See, Yao-Min Liu, Yeyoung Ha, Christopher J Barile, Andrew A Gewirth
Magnesium batteries offer an opportunity to use naturally abundant Mg and achieve large volumetric capacities reaching over four times that of conventional Li-based intercalation anodes. High volumetric capacity is enabled by the use of a Mg metal anode in which charge is stored via electrodeposition and stripping processes, however, electrolytes that support efficient Mg electrodeposition and stripping are few and are often prepared from highly reactive compounds. One interesting electrolyte solution that supports Mg deposition and stripping without the use of highly reactive reagents is the magnesium aluminum chloride complex (MACC) electrolyte...
September 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28933805/perioperative-administration-of-buffered-versus-non-buffered-crystalloid-intravenous-fluid-to-improve-outcomes-following-adult-surgical-procedures
#3
REVIEW
Sohail Bampoe, Peter M Odor, Ahilanandan Dushianthan, Elliott Bennett-Guerrero, Suzie Cro, Tong J Gan, Michael Pw Grocott, Michael Fm James, Michael G Mythen, Catherine Mn O'Malley, Anthony M Roche, Kathy Rowan, Edward Burdett
BACKGROUND: Perioperative fluid strategies influence clinical outcomes following major surgery. Many intravenous fluid preparations are based on simple solutions, such as normal saline, that feature an electrolyte composition that differs from that of physiological plasma. Buffered fluids have a theoretical advantage of containing a substrate that acts to maintain the body's acid-base status - typically a bicarbonate or a bicarbonate precursor such as maleate, gluconate, lactate, or acetate...
September 21, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28931641/serum-magnesium-is-associated-with-the-risk-of-dementia
#4
Brenda C T Kieboom, Silvan Licher, Frank J Wolters, M Kamran Ikram, Ewout J Hoorn, Robert Zietse, Bruno H Stricker, M Arfan Ikram
OBJECTIVE: To determine if serum magnesium levels are associated with the risk of all-cause dementia and Alzheimer disease. METHODS: Within the prospective population-based Rotterdam Study, we measured serum magnesium levels in 9,569 participants, free from dementia at baseline (1997-2008). Participants were subsequently followed up for incident dementia, determined according to the DSM-III-R criteria, until January 1, 2015. We used Cox proportional hazard regression models to associate quintiles of serum magnesium with incident all-cause dementia...
September 20, 2017: Neurology
https://www.readbyqxmd.com/read/28916109/systematic-approach-in-mg-2-ions-analysis-with-a-combination-of-tailored-fluorophore-design
#5
L Lvova, C Guanais Gonçalves, L Prodi, M Sgarzi, N Zaccheroni, M Lombardo, A Legin, C Di Natale, R Paolesse
A systematic study of a series of diaza-18-crown-6 8-hydroxyquinoline (DCHQ) chemosensors, devoted to Mg(II) ion detection, was performed. Functionalization of DCHQ by peripheral substituents allowed the development of novel all-solid-state optodes via inclusion inside PVC-based polymeric films. The influence on the DCHQ-based optode response of the lipophilic sites functionalization and of the nature of the plasticizer, was investigated. Fluorimetric studies on optodes sensitivity towards a number of different metal cations (Ca(2+), Na(+), K(+), Li(+), Co(2+), Cd(2+), Pb(2+), Cu(2+), Hg(2+), Zn(2+)) and NH4(+) were carried out...
October 2, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28911658/identification-of-an-exposure-risk-to-heavy-metals-from-pharmaceutical-grade-rubber-stoppers
#6
Xianghui Li, Pingping Qian
Exposure to low concentrations of heavy metals and metalloids represents a well-documented risk to animal and human health. However, current standards (European Pharmacopeia [EP], United States Pharmacopoeia [USP], International Organization for Standardization [ISO], YBB concerned with rubber closures) only require testing for Zn in pharmaceutical-grade rubber stoppers and then using only pure water as a solvent. We extracted and quantified heavy metals and trace elements from pharmaceutical-grade rubber stoppers under conditions that might occur during the preparation of drugs...
July 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28903997/mitotic-post-translational-modifications-of-histones-promote-chromatin-compaction-in-vitro
#7
Alisa Zhiteneva, Juan Jose Bonfiglio, Alexandr Makarov, Thomas Colby, Paola Vagnarelli, Eric C Schirmer, Ivan Matic, William C Earnshaw
How eukaryotic chromosomes are compacted during mitosis has been a leading question in cell biology since the nineteenth century. Non-histone proteins such as condensin complexes contribute to chromosome shaping, but appear not to be necessary for mitotic chromatin compaction. Histone modifications are known to affect chromatin structure. As histones undergo major changes in their post-translational modifications during mitotic entry, we speculated that the spectrum of cell-cycle-specific histone modifications might contribute to chromosome compaction during mitosis...
September 2017: Open Biology
https://www.readbyqxmd.com/read/28899817/acute-oral-toxicity-study-of-magnesium-oxide-nanoparticles-and-microparticles-in-female-albino-wistar-rats
#8
Bhanuramya Mangalampalli, Naresh Dumala, Paramjit Grover
Advancements in nanotechnology have led to the development of the nanomedicine, which involves nanodevices for diagnostic and therapeutic purposes. A key requirement for the successful use of the nanoparticles (NPs) in biomedical applications is their good dispensability, colloidal stability in biological media, internalization efficiency, and low toxicity. Therefore, toxicological profiling is necessary to understand the mechanism of NPs and microparticles (MPs). MgO NPs have attracted wide scientific interest due to ease of synthesis, chemical stability and unique properties...
September 9, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/28899552/the-use-of-dissolvable-layered-double-hydroxide-components-in-an-in-situ-solid-phase-extraction-for-chromatographic-determination-of-tetracyclines-in-water-and-milk-samples
#9
Nattaphorn Phiroonsoontorn, Sira Sansuk, Yanawath Santaladchaiyakit, Supalax Srijaranai
This research presents a simple and green in situ solid phase extraction (is-SPE) combined with high-performance liquid chromatography (HPLC) for the simultaneous analysis of tetracyclines (TCs) including tetracycline, oxytetracycline, and chlortetracycline. In is-SPE, TCs were efficiently extracted through the precipitation formation of dissolvable layered double hydroxides (LDHs) by mixing the LDH components such as magnesium and aluminum ions (both in metal chloride salts) thoroughly in an alkaline sample solution...
September 4, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28892795/uniform-dispersion-of-cobalt-nanoparticles-over-nonporous-tio2-with-low-activation-energy-for-magnesium-sulfate-recovery-in-a-novel-magnesia-based-desulfurization-process
#10
Lidong Wang, Tieyue Qi, Juan Wang, Shihan Zhang, Huining Xiao, Yongliang Ma
The forced oxidation of magnesium sulfite (MgSO3) aims to not only reclaim the by-product in the magnesia desulfurization, but also lower the risk of secondary pollution. The non-porous titanium dioxide nanoparticle was used as a support to prepare the cobalt catalyst (Co-TiO2) in order to expedite the oxidation rate. This fabricated Co-TiO2 was characterized by inductively coupled plasma optical emission spectroscopy (ICP-OES), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), and energy dispersive spectroscopy (EDS) to figure out its catalytic mechanism...
September 8, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28890762/nutrient-contents-of-the-freshwater-crab-isolapotamon-bauense-from-sarawak-malaysia-borneo
#11
Jongkar Grinang, Pang Sing Tyan, Andrew Alek Tuen, Indraneil Das
Data on nutrient contents of freshwater crabs are important for ecological studies and species conservation assessments, especially when the species concerned is threatened among others by habitat destruction and uncontrolled resources utilisation. Indeed comprehensive biological information is required to reconcile the needs between sustainable resources utilisation and conservation of the species. This study documents the nutrient contents of a freshwater crab, Isolapotamon bauense which is listed as 'Vulnerable' in the IUCN Red List of Threatened Species and also being harvested by local community for dietary supplement...
July 2017: Tropical Life Sciences Research
https://www.readbyqxmd.com/read/28890274/serum-magnesium-concentrations-and-all-cause-cardiovascular-and-cancer-mortality-among-u-s-adults-results-from-the-nhanes-i-epidemiologic-follow-up-study
#12
Xi Zhang, Jin Xia, Liana C Del Gobbo, Adela Hruby, Qi Dai, Yiqing Song
BACKGROUND: Few studies have examined the associations of serum magnesium (Mg) concentrations with total and cause-specific mortality in a nationally representative sample of US adults. We investigate the dose-response relationships of baseline serum Mg concentrations with risk of mortalities in a large, nationally representative sample of US adults. METHODS: We analyzed prospective data of 14,353 participants aged 25-74 years with measures of serum Mg concentrations at baseline (1971-1975) from the National Health and Nutrition Examination Survey I Epidemiologic Follow-up Study (NHEFS)...
August 30, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28886886/are-changes-in-excitability-in-the-hippocampus-of-adult-male-rats-induced-by-prenatal-methamphetamine-exposure-or-stress
#13
Klara Bernaskova, Simona Tomkova, Romana Slamberova
Prenatal stress and drug exposure induce permanent alterations of the brain. Even though different brain structures are involved, alterations almost always refer to the hippocampus. The aim of this study was to investigate the excitability of hippocampal slices in low-magnesium epilepsy model of prenatally methamphetamine (MA, 5mg/kg sc.) or saline (sc., stress model) exposed animals in adult male rats. The second aim was to investigate, if a low dose of MA (1ml/kgs.c.) administered in adulthood changes the hippocampal activity of these animals...
September 5, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28886543/assessing-river-water-quality-using-water-quality-index-in-lake-taihu-basin-china
#14
Zhaoshi Wu, Xiaolong Wang, Yuwei Chen, Yongjiu Cai, Jiancai Deng
Lake Taihu Basin, one of the most developed regions in China, has received considerable attention due to its severe pollution. Our study provides a clear understanding of the water quality in the rivers of Lake Taihu Basin based on basin-scale monitoring and a water quality index (WQI) method. From September 2014 to January 2016, four samplings across four seasons were conducted at 96 sites along main rivers. Fifteen parameters, including water temperature, pH, dissolved oxygen (DO), conductivity, turbidity (tur), permanganate index (CODMn), total nitrogen, total phosphorus, ammonium (NH4-N), nitrite, nitrate (NO3-N), calcium, magnesium, chloride, and sulfate, were measured to calculate the WQI...
September 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28882757/ion-channel-functional-protein-kinase-trpm7-regulates-mg-ions-to-promote-the-osteoinduction-of-human-osteoblast-via-pi3k-pathway-in-vitro-simulation-of-the-bone-repairing-effect-of-mg-based-alloy-implant
#15
Xiuzhi Zhang, Haiyue Zu, Dewei Zhao, Ke Yang, Simiao Tian, Xiaoming Yu, Faqiang Lu, Baoyi Liu, Xiaobing Yu, Benjie Wang, Wei Wang, Shibo Huang, Yongxuan Wang, Zihua Wang, Zhaodong Zhang
Mg-based alloys, as the potential orthopaedic implant, can self-degrade to avoid second operation for its remove, and enable to promote bone repair; however, the underlying molecular mechanisms remain unclear. In the present study, we examined the effect of Mg ions on osteogenesis, chemotaxis and anti-alkaline stress in hFOB1.19 human osteoblast cells to simulate bone-repairing effect of a biodegradable Mg-based alloy implant in vitro, and explored the regulatory role of the transient receptor potential melastatin 7 (TRPM7)/phosphoinositide 3-kinase (PI3K) signalling pathway in the process of Mg ion-induced bone repair by knockdown of TRPM7 and antagonizing PI3K activity...
September 4, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28882031/a-multiregional-italian-cohort-of-24-hour-urine-metabolic-evaluation-in-renal-stone-formers
#16
Francesco Esperto, Martino Marangella, Alberto Trinchieri, Michele Petrarulo, Roberto Miano
BACKGROUND: Nephrolithiasis is a common condition with several studies documenting an increased prevalence over the past four decades. EAU and AUA guidelines recommend 24-hour urine metabolic evaluation in high-risk stone formers. Aim of this study is to retrospectively evaluate the first three years of experience with Lithotest® (Biohealth Italia Srl, Turin, Italy) through the analysis of demographic, clinical and biochemical data collected from a large cohort of patients with kidney stones...
September 7, 2017: Minerva Urologica e Nefrologica, the Italian Journal of Urology and Nephrology
https://www.readbyqxmd.com/read/28879625/effects-of-arsenic-compounds-on-microminerals-content-and-antioxidant-enzyme-activities-in-rat-liver
#17
Ana Cláudia Ferreira Souza, Sarah Cozzer Marchesi, Graziela Domingues de Almeida Lima, Mariana Machado-Neves
Interactions of arsenic with essential trace elements may result in disturbances on body homeostasis. In the present study, we aimed to investigate the effects of different arsenic compounds on micromineral content and antioxidant enzyme activities in rat liver. Male Wistar rats were randomly divided into five groups and exposed to sodium arsenite and sodium arsenate at 0.01 and 10 mg/L for 8 weeks in drinking water. The concentration of arsenic increased in the liver of all arsenic-exposed animals. The proportion of zinc and copper increased in animals exposed to 0...
September 6, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28874798/a-rare-earth-free-magnesium-alloy-with-improved-intrinsic-ductility
#18
S Sandlöbes, M Friák, S Korte-Kerzel, Z Pei, J Neugebauer, D Raabe
Metals are the backbone of manufacturing owing to their strength and formability. Compared to polymers they have high mass density. There is, however, one exception: magnesium. It has a density of only 1.7 g/cm(3), making it the lightest structural material, 4.5 times lighter than steels, 1.7 times lighter than aluminum, and even slightly lighter than carbon fibers. Yet, the widespread use of magnesium is hampered by its intrinsic brittleness. While other metallic alloys have multiple dislocation slip systems, enabling their well-known ductility, the hexagonal lattice of magnesium offers insufficient modes of deformation, rendering it intrinsically brittle...
September 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28872122/ammonia-synthesis-at-low-pressure
#19
Edward Cussler, Alon McCormick, Michael Reese, Mahdi Malmali
Ammonia can be synthesized at low pressure by the use of an ammonia selective absorbent. The process can be driven with wind energy, available locally in areas requiring ammonia for synthetic fertilizer. Such wind energy is often called "stranded," because it is only available far from population centers where it can be directly used. In the proposed low pressure process, nitrogen is made from air using pressure swing absorption, and hydrogen is produced by electrolysis of water. While these gases can react at approximately 400 °C in the presence of a promoted conventional catalyst, the conversion is often limited by the reverse reaction, which makes this reaction only feasible at high pressures...
August 23, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28871377/the-maize-cora-mrs2-mgt-type-mg-transporter-zmmgt10-responses-to-magnesium-deficiency-and-confers-low-magnesium-tolerance-in-transgenic-arabidopsis
#20
Hongyou Li, Ning Wang, Jianzhou Ding, Chan Liu, Hanmei Du, Kaifeng Huang, Moju Cao, Yanli Lu, Shibin Gao, Suzhi Zhang
ZmMGT10 was specifically expressed in maize roots and induced by a deficiency of magnesium. Overexpression of ZmMGT10 restored growth deficiency of the Salmonella typhimurium MM281 strain and enhanced the tolerance in Arabidopsis to stress induced by low magnesium levels by increasing uptake of Mg(2+) via roots. CorA/MRS2/MGT-type Mg(2+) transporters play a significant role in maintaining magnesium (Mg) homeostasis in plants. Although the maize CorA/MRS2/MGT family comprises of 12 members, currently no member has been functionally characterized...
September 4, 2017: Plant Molecular Biology
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