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https://www.readbyqxmd.com/read/29454278/towards-a-better-understanding-on-mercury-adsorption-by-magnetic-bio-adsorbents-with-%C3%AE-fe-2-o-3-from-pinewood-sawdust-derived-hydrochar-influence-of-atmosphere-in-heat-treatment
#1
Huabin Wang, Yong Liu, Jerosha Ifthikar, Lerong Shi, Aimal Khan, Zhulei Chen, Zhuqi Chen
Pyrolysis under protective atmosphere was regarded as an indispensable process for the preparation of biomass-based adsorbents to achieve higher surface areas. In this paper, magnetic carbon composites (MCC) that fabricated under air atmosphere showed an adsorption capacity of 167.22 mg/g in 200 ppm Hg(II), which was significantly higher than magnetic biochar (MBC, 31.80 mg/g) that fabricated under traditional nitrogen protection, and this remarkable performance of MCC was consistent in a wide range of pHs...
February 6, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29454255/effects-of-adjunctive-eslicarbazepine-acetate-on-neurocognitive-functioning-in-children-with-refractory-focal-onset-seizures
#2
Sergiusz Jóźwiak, P Veggiotti, J Moreira, H Gama, F Rocha, P Soares-da-Silva
PURPOSE: This was a phase-II, randomized, double-blind (DB), placebo-controlled study aimed to evaluate neurocognitive effects of eslicarbazepine acetate (ESL) as adjunctive therapy in pediatric patients with refractory focal-onset seizures (FOS). METHODS: Children (6-16years old) with FOS were randomized (2:1) to ESL or placebo. Treatment started at 10mg/kg/day, was up-titrated up to 30mg/kg/day (target dose), and maintained for 8weeks, followed by one-year open-label follow-up...
February 13, 2018: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/29454207/repeated-treatments-of-ciprofloxacin-and-kresoxim-methyl-alter-their-dissipation-rates-biological-function-and-increase-antibiotic-resistance-in-manured-soil
#3
Hua Fang, Lingxi Han, Houpu Zhang, Yanfei Deng, Qiqing Ge, Jiajia Mei, Zhengnan Long, Yunlong Yu
The dissipation of ciprofloxacin (CIP, 1.0 and 10.0mg/kg) and kresoxim-methyl (KM, 1.0 and 2.0mg/kg) in manure-amended soil, the variations in soil enzyme activities and microbial functional diversities, and CIP-induced bacterial community tolerances were studied using a chromatographic analysis, enzyme colorimetric and titration analyses, and the BIOLOG EcoPlate method. Three successive treatments of individual and combined samples of CIP and KM at low and high concentrations were performed at 60d intervals...
February 14, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29454149/study-of-manganese-binding-to-the-ferroxidase-centre-of-human-h-type-ferritin
#4
Matteo Ardini, Barry D Howes, Annarita Fiorillo, Elisabetta Falvo, Silvia Sottini, Donella Rovai, Marco Lantieri, Andrea Ilari, Dante Gatteschi, Gabriele Spina, Emilia Chiancone, Simonetta Stefanini, Maria Fittipaldi
Ferritins are ubiquitous and conserved proteins endowed with enzymatic ferroxidase activity, that oxidize Fe(II) ions at the dimetal ferroxidase centre to form a mineralized Fe(III) oxide core deposited within the apo-protein shell. Herein, the in vitro formation of a heterodimetal cofactor constituted by Fe and Mn ions has been investigated in human H ferritin (hHFt). Namely, Mn and Fe binding at the hHFt ferroxidase centre and its effects on Fe(II) oxidation have been investigated by UV-Vis ferroxidation kinetics, fluorimetric titrations, multifrequency EPR, and preliminary Mössbauer spectroscopy...
February 9, 2018: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29454017/a-rapid-method-for-titration-of-ascovirus-infectivity
#5
Ningning Han, Zishu Chen, Hu Wan, Guohua Huang, Jianhong Li, Byung Rae Jin
Ascoviruses are a recently described family and the traditional plaque assay and end-point PCR assay have been used for their titration. However, these two methods are time-consuming and inaccurate to titrate ascoviruses. In the present study, a quick method for the determination of the titer of ascovirus stocks was developed based on ascovirus-induced apoptosis in infected insect cells. Briefly, cells infected with serial dilutions of virus (10 -2 to 10 -10 ) for 24 h were stained with trypan blue. The stained cells were counted, and the percentage of nonviable cells was calculated...
February 14, 2018: Journal of Virological Methods
https://www.readbyqxmd.com/read/29453713/-1-h-13-c-and-15-n-resonance-assignments-of-cw-domain-of-the-n-methyltransferase-ashh2-free-and-bound-to-the-mono-di-and-tri-methylated-histone-h3-tail-peptides
#6
Olena Dobrovolska, Maxim Bril'kov, Øyvind Ødegård-Fougner, Rein Aasland, Øyvind Halskau
The ASHH2 CW domain is responsible for recognizing the methylation state at lysine 4 of histone 3 N-terminal tails and implicated in the recruitment of the ASHH2 methyltransferase enzyme correctly to the histones. The ASHH2 CW domain binds H3 lysine motifs that can be either mono-, di-, or tri-methylated [ARTK(meX)QTAR, where X denotes the number of methylations], but binds strongest to monomethylated instances (K d values reported in the range of 1 µm to 500 nM). Hoppmann et al. published the uncomplexed NMR structure of an ASHH2 CW domain in 2011...
February 16, 2018: Biomolecular NMR Assignments
https://www.readbyqxmd.com/read/29453639/upper-airway-obstruction-induced-by-non-invasive-ventilation-using-an-oronasal-interface
#7
Valentin Schellhas, Christian Glatz, Ingo Beecken, Angelika Okegwo, Anna Heidbreder, Peter Young, Matthias Boentert
BACKGROUND: On initiation of long-term non-invasive ventilation (NIV), intermittent upper airway obstruction has rarely been described as possibly treatment-induced. Inspiratory pressure effects and the use of an oronasal interface may promote obstructive events in some patients with neuromuscular disease (NMD) and amyotrophic lateral sclerosis (ALS) in particular. METHODS: We evaluated clinical data from 212 patients in whom NIV was initiated using an oronasal mask...
February 17, 2018: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/29453283/chemical-stresses-fail-to-mimic-the-unfolded-protein-response-resulting-from-luminal-load-with-unfolded-polypeptides
#8
Timothy J Bergmann, Ilaria Fregno, Fiorenza Fumagalli, Andrea Rinaldi, Francesco Bertoni, Paul J Boersema, Paola Picotti, Maurizio Molinari
The stress sensors ATF6, IRE1 and PERK monitor deviations from homeostatic conditions in the endoplasmic reticulum (ER), a protein biogenesis compartment of eukaryotic cells. Their activation elicits unfolded protein responses (UPR) to re-establish proteostasis. UPR have been extensively investigated in cells exposed to chemicals that activate ER stress sensors by perturbing calcium, N-glycans or redox homeostasis. Cell responses to variations in luminal load with unfolded proteins are, in contrast, poorly characterized...
February 16, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29453120/mycobiota-and-co-occurrence-of-mycotoxins-in-south-african-maize-based-opaque-beer
#9
Ifeoluwa Adekoya, Adewale Obadina, Cynthia Chilaka Adaku, Marthe De Boevre, Sheila Okoth, Sarah De Saeger, Patrick Njobeh
Beer, a beverage consumed throughout the world, is mainly derived from cereals. In this study, fungal and mycotoxin contamination, as well as the physicochemical properties of maize-based opaque beer (umqombothi) obtained from the Gauteng province of South Africa, was investigated. The mean water activity, pH and total titratable acidity of the analysed beer samples were 0.91, 3.76 and 1.20% lactic acid, respectively. The investigation revealed Aspergillus, Penicillium, Phoma and Saccharomyces as the predominant fungal genera with a mean fungal load of 3...
February 9, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29452919/high-dose-insulin-for-beta-blocker-and-calcium-channel-blocker-poisoning-17years-of-experience-from-a-single-poison-center
#10
Jon B Cole, Ann M Arens, JoAn R Laes, Lauren R Klein, Stacey A Bangh, Travis D Olives
BACKGROUND/OBJECTIVES: High dose insulin (HDI) is a standard therapy for beta-blocker (BB) and calcium channel-blocker (CCB) poisoning, however human case experience is rare. Our poison center routinely recommends HDI for shock from BBs or CCBs started at 1U/kg/h and titrated to 10U/kg/h. The study objective was to describe clinical characteristics and adverse events associated with HDI. METHODS: This was a structured chart review of patients receiving HDI for BB or CCB poisoning with HDI defined as insulin infusion of ≥0...
February 6, 2018: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29452882/synthesis-characterisation-and-dna-intercalation-studies-of-regioisomers-of-ruthenium-ii-polypyridyl-complexes
#11
Laura Perdisatt, Samar Moqadasi, Luke O'Neill, Gary Hessman, Alessandra Ghion, Muhammad Qasim Mushtaq Warraich, Alan Casey, Christine O'Connor
Regioisomers of the functional group of the main ligand (L) on a series of [Ru(phen) 2 L] 2+ and [Ru(bpy) 2 L] 2+ complexes, where phen is 1,10 phenanthroline and bpy is 2,2'-bipyridine, were synthesised to investigate the interaction with deoxyribonucleic acid (DNA) as potential therapeutics. UV-Vis binding titrations, thermal denaturation and circular dichroism were used to evaluate their interaction with DNA. The conclusions indicated the significance of the auxiliary ligand; especially 1,10-phenanthroline has on the binding constants (K b )...
February 9, 2018: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29449376/structural-basis-for-the-glycosyltransferase-activity-of-the-salmonella-effector-ssek3
#12
Diego Esposito, Regina A Günster, Luigi Martino, Kamel El Omari, Armin Wagner, Teresa L M Thurston, Katrin Rittinger
The Salmonella secreted effector SseK3 translocates into host cells, targeting innate immune responses including NF-κB activation. SseK3 is a glycosyltransferase that transfers an N-acetylglucosamine (GlcNAc) moiety onto the guanidino group of a target arginine, modulating host cell function. However, a lack of structural information has precluded elucidation of the molecular mechanisms in arginine and GlcNAc selection. We report here the crystal structure of SseK3 in its apo form and in complex with hydrolysed UDP-GlcNAc...
February 15, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29449216/adjustable-delivery-of-pro-angiogenic-fgf-2-by-collagen-alginate-microspheres
#13
Zaheer Ali, Anik Islam, Peter Sherrell, Mark Le-Moine, Georgios Lolas, Konstantinos Syrigos, Mehrdad Rafat, Lasse D Jensen
Therapeutic induction of blood vessel growth (angiogenesis) in ischemic tissues holds great potential for treatment of myocardial infarction and stroke. Achieving sustained angiogenesis and vascular maturation has, however, been highly challenging. Here we demonstrate that collagen:alginate hydrogels containing therapeutic, pro-angiogenic FGF-2, and formulated as microspheres, is a promising and clinically relevant vehicle for therapeutic angiogenesis. By titrating the amount of readily dissolvable and degradable collagen with more slowly degradable alginate in the hydrogel mixture, the degradation rates of the biomaterial controlling the release kinetics of embedded pro-angiogenic FGF-2 can be adjusted...
February 15, 2018: Biology Open
https://www.readbyqxmd.com/read/29447932/determining-the-venous-oxygen-reservoir-a-novel-hypothetical-approach-to-titration-of-supplemental-oxygen-in-preterm-newborns
#14
Chad C Andersen, Nicolette A Hodyl, Nina M Ziegler, Michael J Stark
While normal oxygen saturation is commonly thought to be a marker of normal oxygenation, cutaneous saturation does not account for the sufficiency of oxygen within each cell or that of the system overall. Rather, cutaneous oximetry simply defines the saturation of haemoglobin (Hb) with oxygen in a pulsatile vessel. Assessment of sufficiency is best determined by measurement of the amount of oxygen left over following aerobic respiration. This left over oxygen is 'stored' on Hb in the venous compartment and can be calculated as the venous oxygen content...
March 2018: Medical Hypotheses
https://www.readbyqxmd.com/read/29446621/oxidative-dehydrogenation-on-nanocarbon-insights-into-the-reaction-mechanism-and-kinetics-via-in-situ-experimental-methods
#15
Wei Qi, Pengqiang Yan, Dang Sheng Su
Sustainable and environmentally benign catalytic processes are vital for the future to supply the world population with clean energy and industrial products. The replacement of conventional metal or metal oxide catalysts with earth abundant and renewable nonmetallic materials has attracted considerable research interests in the field of catalysis and material science. The stable and efficient catalytic performance of nanocarbon materials was discovered at the end of last century, and these materials are considered as potential alternatives for conventional metal-based catalysts...
February 15, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29444825/structure-and-function-of-a-novel-periplasmic-chitooligosaccharide-binding-protein-from-marine-vibrio-bacteria
#16
Wipa Suginta, Natchanok Sritho, Araya Ranok, David Bulmer, Yoshihito Kitaoku, Bert van den Berg, Tamo Fukamizo
Periplasmic solute-binding proteins (SBPs) in bacteria are involved in the active transport of nutrients into the cytoplasm. In marine bacteria of the genus Vibrio, a chitooligosaccharide-binding protein (CBP) is thought to be the major SBP controlling the rate of chitin uptake in these bacteria. However, the molecular mechanism of the CBP involvement in chitin metabolism has not been elucidated. Here, we report the structure and function of a recombinant chitooligosaccharide-binding protein from Vibrio harveyi , namely Vh CBP, expressed in Escherichia coli...
February 14, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29444251/cultured-equine-satellite-cells-as-a-model-system-to-assess-leucine-stimulated-protein-synthesis-in-horse-muscle
#17
M L DeBoer, K M Martinson, M S Pampusch, A M Hansen, S M Wells, C Ward, M Hathaway
Leucine has been shown to stimulate the mammalian/mechanistic target of rapamycin (mTOR) signaling pathway which plays numerous key regulatory roles in cell growth, survival and metabolism including protein synthesis in a number of species. However, previous work with equine satellite cells has suggested distinct species differences in regards to physiological effects and the magnitude of responses to growth factors and regulators. Because there is limited research available regarding the role of leucine in regulating equine skeletal muscle protein synthesis, the objective of this study was to evaluate the effect of leucine on the mTOR signaling pathway in cultured equine satellite...
February 12, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/29444082/s100b-as-an-antagonist-to-block-the-interaction-between-s100a1-and-the-rage-v-domain
#18
Md Imran Khan, Yu-Kai Su, Jinhao Zou, Lee-Wei Yang, Ruey-Hwang Chou, Chin Yu
Ca2+-binding human S100A1 protein is a type of S100 protein. S100A1 is a significant mediator during inflammation when Ca2+ binds to its EF-hand motifs. Receptors for advanced glycation end products (RAGE) correspond to 5 domains: the cytoplasmic, transmembrane, C2, C1, and V domains. The V domain of RAGE is one of the most important target proteins for S100A1. It binds to the hydrophobic surface and triggers signaling transduction cascades that induce cell growth, cell proliferation, and tumorigenesis. We used nuclear magnetic resonance (NMR) spectroscopy to characterize the interaction between S100A1 and the RAGE V domain...
2018: PloS One
https://www.readbyqxmd.com/read/29443072/extraction-of-ramie-fiber-in-alkali-hydrogen-peroxide-system-supported-by-controlled-release-alkali-source
#19
Chaoran Meng, Zhaoling Li, Chaoyun Wang, Chongwen Yu, Xuerong Bi, Siyi Wang
This protocol demonstrates a method for ramie fiber extraction by scouring raw ramie in an alkali hydrogen peroxide system supported by a controlled-release alkali source. The fiber extracted from ramie is a type of textile material of great importance. In previous studies, ramie fiber was extracted in an alkali hydrogen peroxide system supported only by sodium hydroxide.However, due to the strong alkalinity of sodium hydroxide, the oxidation reaction speed of hydrogen peroxide was difficult to control and thus resulted in great damage to the treated fiber...
February 6, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29443023/laser-microirradiation-to-study-in-vivo-cellular-responses-to-simple-and-complex-dna-damage
#20
Xiangduo Kong, Gladys M S Cruz, Bárbara A Silva, Nicole M Wakida, Nima Khatibzadeh, Michael W Berns, Kyoko Yokomori
DNA damage induces specific signaling and repair responses in the cell, which is critical for protection of genome integrity. Laser microirradiation became a valuable experimental tool to investigate the DNA damage response (DDR) in vivo. It allows real-time high-resolution single-cell analysis of macromolecular dynamics in response to laser-induced damage confined to a submicrometer region in the cell nucleus. However, various laser conditions have been used without appreciation of differences in the types of damage induced...
January 31, 2018: Journal of Visualized Experiments: JoVE
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