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https://www.readbyqxmd.com/read/29784247/evaluation-of-the-head-helmet-sliding-properties-in-an-impact-test
#1
Antonia Trotta, Aisling Ní Annaidh, Roy Owen Burek, Bart Pelgrims, Jan Ivens
The scalp plays a crucial role in head impact biomechanics, being the first tissue involved in the impact and providing a sliding interface between the impactor and/or helmet and the skull. It is important to understand both the scalp-skull and the scalp-helmet sliding in order to determine the head response due to an impact. However, experimental data on the sliding properties of the scalp is lacking. The aim of this work was to identify the sliding properties of the scalp using cadaver heads, in terms of scalp-skull and scalp-liner (internal liner of the helmet) friction and to compare these values with that of widely used artificial headforms (HIII and magnesium EN960)...
May 18, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29783873/current-and-potential-treatment-options-for-hyperphosphatemia
#2
Fabio Carfagna, Lucia Del Vecchio, Giuseppe Pontoriero, Francesco Locatelli
Hyperphosphatemia is common in late stages of chronic kidney disease and is often associated with elevated parathormone levels, abnormal bone mineralization, extra-osseous calcification, and increased risk of cardiovascular events and death. Several classes of oral phosphate binders are available to help control plasma phosphorus levels. Although effective at lowering serum phosphorus, they all have safety, tolerability, and compliance issues that need to be considered when selecting which one to use. Areas covered: This paper reviews the most established treatment options for hyperphosphatemia, in patients with chronic kidney disease, focusing on the new inhibitors of active phosphate absorption...
May 21, 2018: Expert Opinion on Drug Safety
https://www.readbyqxmd.com/read/29782990/a-certain-role-of-sod-cat-imbalance-in-pathogenesis-of-autism-spectrum-disorders
#3
Konstantin Yenkoyan, Hayk Harutyunyan, Aida Harutyunyan
The real impact of reactive oxygen species, antioxidant enzymes, mitochondrial dysfunction and chronic inflammation on the development of autism spectrum disorders (ASD) remains unclear, and even controversial. In this study we compared the plasma levels of antioxidant enzymes and their cofactors, markers of oxidative damage, and the respiratory burst in peripheral blood polymorphonuclear leukocytes (PMNL) as surrogate marker of chronic inflammation obtained from 10 children (4-10 year old) who met DSM-5 criteria and their siblings...
May 18, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29782697/fewer-defects-in-the-surface-slows-the-hydrolysis-rate-decreases-the-ros-generation-potential-and-improves-the-non-ros-antimicrobial-activity-of-mgo
#4
Nemanja Anicˇić, Marija Vukomanović, Tilen Koklicˇ, Danilo Suvorov
Magnesium oxide (MgO) is recognised as exhibiting a contact-based antibacterial activity. However, a comprehensive study of the impact of atomic-scale surface features on MgO's antibacterial activity is lacking. In this study, the nature and abundance of the native surface defects on different MgO powders are thoroughly investigated. Their impacts on the hydrolysis kinetics, antibacterial activity against Escherichia coli (ATCC 47076), Staphylococcus epidermidis and Pseudomonas aeruginosa and the reactive oxygen species (ROS) generation potential are determined and explained...
May 21, 2018: Small
https://www.readbyqxmd.com/read/29778760/electrochemical-disinfection-of-groundwater-for-civil-use-an-example-of-an-effective-endogenous-advanced-oxidation-process
#5
Achille De Battisti, Paolo Formaglio, Sergio Ferro, Mustafa Al Aukidy, Paola Verlicchi
Lab-scale experiments using real groundwater were carried out using the CabECO® reactor system in order to evaluate its suitability for producing safe water, acceptable for civil purposes. Trials were carried out in discontinuous and in continuous mode, analyzing the influence of electrical and hydraulic process parameters on the quality of treated water. The use of highly boron-doped diamond electrodes in the reactor allowed the electrosynthesis of considerable amounts of ozone. Because of the relatively high amount of chloride in the groundwater samples, a mixture of HOCl/ClO- was also synthesized...
May 12, 2018: Chemosphere
https://www.readbyqxmd.com/read/29775291/reactive-uptake-of-glyoxal-by-ammonium-containing-salt-particles-as-a-function-of-relative-humidity
#6
Masao Gen, Dandan Huang, Chak Keung Chan
Reactions between dissolved ammonia and carbonyls, which form light-absorbing species in atmospheric particles, can be accelerated by actively removing water from the reaction system. Here, we examine the effects of relative humidity (RH) on the reactive uptake of glyoxal (Gly) by aqueous particles of ammonium sulfate (AS), ammonium bisulfate, sodium sulfate, magnesium sulfate, ammonium nitrate (AN), and sodium nitrate. In-situ Raman analysis was used to quantify particle-phase Gly and a colored product, 2,2'-biimidazole (BI) as a function of uptake time...
May 18, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29772019/the-effect-of-abandonment-on-vegetation-composition-and-soil-properties-in-molinion-meadows-sw-poland
#7
Grzegorz Swacha, Zoltán Botta-Dukát, Zygmunt Kącki, Daniel Pruchniewicz, Ludwik Żołnierz
Intermittently wet meadows of the Molinion alliance, as with many other grasslands of high-nature value, have become increasingly exposed to abandonment due to their low economic value. The potential consequences of land abandonment are the decrease in species diversity and environmental alterations. The issue of land-use induced changes in plant species composition and soil physico-chemical parameters have been rarely studied in species-rich intermittently wet grasslands. In this study we attempt to i) to identify determinants of plant species composition patterns and ii) to investigate the effect of cessation of mowing on vegetation composition and soil properties...
2018: PloS One
https://www.readbyqxmd.com/read/29770414/mesoporous-germanium-nanoparticles-synthesized-in-molten-zinc-chloride-at-low-temperature-as-a-high-performance-anode-for-lithium-ion-batteries
#8
Xianyu Liu, Ning Lin, Wenlong Cai, Yingyue Zhao, Jianbin Zhou, Jianwen Liang, Yongchun Zhu, Yitai Qian
In a simple and convenient way, mesoporous germanium nanoparticles (mp-Ge NPs) are prepared by a "metathesis" reaction of magnesium germanide (Mg2Ge) and zinc chloride (ZnCl2) in an autoclave at 300 °C. Investigated as anode materials for lithium-ion batteries, the prepared mp-Ge NPs exhibit a high capacity retention of 1048 mA h g-1 at 1 C after 1000 cycles and a high rate capacity of 727.1 mA h g-1 at 10 C in Li-Ge half cells. Additionally, a 3.4 V lithium-ion full cell (Ge-LiCoO2) with an energy retention of 85% (∼268...
May 17, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29767557/polycystin-1-dysfunction-impairs-electrolyte-and-water-handling-in-a-renal-pre-cystic-mouse-model-for-adpkd
#9
Eric H J Verschuren, Sami G Mohammed, Wouter N Leonhard, Caro Overmars-Bos, Kimberly A M Veraar, Joost G J Hoenderop, René J M Bindels, Dorien J M Peters, Francisco J Arjona
The PKD1 gene encodes polycystin-1 (PC1), a mechanosensor triggering intracellular responses upon urinary flow sensing in kidney tubular cells. Mutations in PKD1 lead to autosomal dominant polycystic kidney disease (ADPKD). The involvement of PC1 in renal electrolyte handling remains unknown since renal electrolyte physiology in ADPKD patients has only been characterized in cystic ADPKD. We thus studied the renal electrolyte handling in inducible kidney-specific Pkd1 knockout (iKsp-Pkd1-/-) mice manifesting a pre-cystic phenotype...
May 16, 2018: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29767241/transcriptome-sequencing-analysis-reveals-the-effect-of-combinative-treatment-with-low%C3%A2-intensity-pulsed-ultrasound-and-magnesium-ions-on-hfob1-19-human-osteoblast-cells
#10
Haiyue Zu, Xueting Yi, Dewei Zhao
Biodegradable magnesium (Mg) materials are considered ideal as osteosynthesis implants. However, clinical application has proven complex. This is primarily associated with the issue of reducing the extent of implant degradation to a range acceptable for the human body, while simultaneously enhancing osteogenesis or osteoinduction. In the present study, a combination of Mg ions and low‑intensity pulsed ultrasound (LIPUS) treatment was applied in hFOB 1.19 human osteoblast cells as a potential strategy to resolve this issue...
May 11, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29764627/dietary-factors-influence-the-association-of-cyclin-d2-polymorphism-rs11063069-with-the-risk-of-metabolic-syndrome
#11
Gelareh Koochakpoor, Parvin Mirmiran, Maryam S Daneshpour, Firoozeh Hosseini-Esfahani, Bahareh Sedaghati-Khayat, Seyed Ahmad Hosseini, Fereidoun Azizi
The relationship of CCND2 gene variation, rs11063069 with metabolic syndrome (MetS) modulates by dietary factors but enough data are not available on this issue. So, the hypothesis, which assumes that dietary factors modulate the relationship of CCND2 polymorphisms with the risk of MetS was investigated in our study. Subjects of this nested case-control study were selected from participants of the Tehran Lipid and Glucose Study. Each case (n=974) was pair-matched individually with a control by age, sex and the follow-up duration...
April 2018: Nutrition Research
https://www.readbyqxmd.com/read/29758962/association-between-serum-magnesium-and-common-complications-of-diabetes-mellitus
#12
Yiyan Zhang, Qin Li, Yi Xin, Weiqi Lv, Chuanbin Ge
BACKGROUND: Magnesium ion, as important cation in the human body, involved in various enzymatic reactions, glucose transport and insulin release. Now diabetes mellitus and diabetic complications have become important public health problems around the world. OBJECTIVE: This paper explores the association between concentration levels of serum magnesium and common complications and comorbidities of diabetes mellitus and other biochemical indexes. METHODS: There are 1217 eligible patients selected from 14,317 cases of diabetic hospitalization patients from January 2010 to December 2011...
April 27, 2018: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29751309/modeling-salinization-and-recovery-of-road-salt-impacted-lakes-in-temperate-regions-based-on-long-term-monitoring-of-lake-george-new-york-usa-and-its-drainage-basin
#13
J W Sutherland, S A Norton, J W Short, C Navitsky
Road salt mitigates winter highway icing but accumulates in watershed soils and receiving waters, affecting soil chemistry and physical, biological, and ecological processes. Despite efforts to reduce salt loading in watersheds, accumulated cations and Cl- continue to impact tributaries and lakes, and the recovery process is not well understood. Lake George, New York (USA) is typical of many temperate lakes at risk for elevated Cl- concentrations from winter deicing; the lake salt concentration increased by ~3...
May 8, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29744448/biodegradation-of-mg-14li-alloy-in-simulated-body-fluid-a-proof-of-concept-study
#14
Xiao-Bo Chen, Chuanqiang Li, Daokui Xu
High corrosion kinetics and localised corrosion progress are the primary concerns arising from the clinical implementation of magnesium (Mg) based implantable devices. In this study, a binary Mg-lithium (Li) alloy consisting a record high Li content of 14% (in weight) was employed as model material aiming to yield homogenous and slow corrosion behaviour in a simulated body fluid, i.e. minimum essential medium (MEM), in comparison to that of generic Mg alloy AZ31 and biocompatible Mg-0.5Zn-0.5Ca counterparts...
March 2018: Bioactive Materials
https://www.readbyqxmd.com/read/29739543/special-indications-for-opioid-free-anaesthesia-and-analgesia-patient-and-procedure-related-including-obesity-sleep-apnoea-chronic-obstructive-pulmonary-disease-complex-regional-pain-syndromes-opioid-addiction-and-cancer-surgery
#15
REVIEW
Adrian Sultana, David Torres, Roman Schumann
Opioid-free anaesthesia (OFA) is a technique where no intraoperative systemic, neuraxial or intracavitary opioid is administered with the anaesthetic. Opioid-free analgesia similarly avoids opioids in the perioperative period. There are many compelling reasons to avoid opioids in the surgical population. A number of case reports and, increasingly, prospective studies from all over the world support its benefits, especially in the morbidly obese population with or without sleep apnoea. A derivative technique is opioid sparing, where the same techniques are used but some opioid use is allowed...
December 2017: Best Practice & Research. Clinical Anaesthesiology
https://www.readbyqxmd.com/read/29738375/magnesium-citrate-protects-against-vascular-calcification-in-an-adenine-induced-crf-rat-model
#16
PhD Zhihui-Yao, M D Yang-Xu, M D Weidong-Ma, Xin-Yuan Sun, PhD Shan-Jia, M D Yang-Zheng, M D Xiaohuan-Liu, M D Yajie-Fan, M D Congxia-Wang
BACKGROUND: Hypomagnemia was identified as a strong risk factor for cardiovascular disease in patients with chronic renal failure (CRF). However, the effects of magnesium (Mg) on vascular calcification (VC) have not been fully elucidated. Thus we aim to determine the effects of Mg citrate (MgCit) on VC in CRF rats. METHODS: Rats were divided into 5 groups: group 1 (normal diet); group 2 (normal diet with MgCit); group 3 (VC model of CRF induced by 0.75% adenine and 0...
April 24, 2018: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/29737370/method-development-and-validation-for-total-haloxyfop-analysis-in-infant-formulas-and-related-ingredient-matrices-using-liquid-chromatography-tandem-mass-spectrometry
#17
Urairat Koesukwiwat, Lukas Vaclavik, Katerina Mastovska
According to the European Commission directive 2006/141/EC, haloxyfop residue levels should not exceed 0.003 mg/kg in ready-to-feed infant formula, and the residue definition includes sum of haloxyfop, its esters, salts, and conjugates expressed as haloxyfop. A simple method for total haloxyfop analysis in infant formula and related ingredient matrices was developed and validated using liquid chromatography-tandem mass spectrometry (LC-MS/MS). The sample preparation consisted of an alkaline hydrolysis with methanolic sodium hydroxide to release haloxyfop (parent acid) from its bound forms prior to the extraction with acetonitrile...
May 8, 2018: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29731763/magnesium-increases-homoeologous-crossover-frequency-during-meiosis-in-zip4-ph1-gene-mutant-wheat-wild-relative-hybrids
#18
María-Dolores Rey, Azahara C Martín, Mark Smedley, Sadiye Hayta, Wendy Harwood, Peter Shaw, Graham Moore
Wild relatives provide an important source of useful traits in wheat breeding. Wheat and wild relative hybrids have been widely used in breeding programs to introduce such traits into wheat. However, successful introgression is limited by the low frequency of homoeologous crossover (CO) between wheat and wild relative chromosomes. Hybrids between wheat carrying a 70 Mb deletion on chromosome 5B ( ph1b ) and wild relatives, have been exploited to increase the level of homoeologous CO, allowing chromosome exchange between their chromosomes...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29731579/evaluation-of-magnesium-levels-in-blood-and-saliva-of-oral-squamous-cell-carcinoma-and-potentially-malignant-disorders-by-xylidyl-blue-method
#19
Niloufa Z Aziz, K Arathi, B Ganesh Prasad, Dinkar Desai, Sharan J Shetty, Mohammed Shahid
Background: Cancer is Latinized from Greek word 'karkinos' meaning crab, denoting how carcinoma extends its claws like a crab into adjacent tissues. It has been well established by researchers that virtually all oral cancer are preceded by visible clinical changes in the oral mucosa usually in the form of white or red patch (two-step process of cancer development). Mg is an essential mineral that is needed for a broad variety of physiological functions. Imbalances in Mg metabolism are common and are associated with different pathological conditions...
January 2018: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/29728677/a-strong-and-deformable-in-situ-magnesium-nanocomposite-igniting-above-1000-%C3%A2-c
#20
Sravya Tekumalla, Yogesh Nandigam, Nitish Bibhanshu, Shabadi Rajashekara, Chen Yang, Satyam Suwas, Manoj Gupta
Magnesium has been trending of late in automobile, aerospace, defense, sports, electronic and biomedical sectors as it offers an advantage in light-weighting. In aluminum, titanium, and steel dominated aerospace and defense sectors, applications of Mg were banned/restricted until recently due to perceived easy ignition and inability to self-extinguish immediately. Strength is generally inversely related to ductility, weak texture and unrelated to ignition resistance, making it challenging to optimize all four concurrently in a material...
May 4, 2018: Scientific Reports
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