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https://www.readbyqxmd.com/read/28636155/the-use-of-transnasal-humidified-rapid-insufflation-ventilatory-exchange-thrive-in-17-cases-of-subglottic-stenosis
#1
Kim To, Fleur Harding, McNeill Scott, Pamela Milligan, Iain J Nixon, Richard Adamson, Alistair F McNarry
Shared airway management in patients with subglottic stenosis (SGS) is challenging for both the anaesthetist and surgeon. Various methods of airway management have been described but currently no gold standard exists. Jet ventilation has been described as the preferred technique despite a UK National Survey highlighting potential complications including pneumothorax, pneumomediastinum, surgical emphysema, hypoxia and death. This article is protected by copyright. All rights reserved.
June 21, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/28636148/magneto-structural-characterization-of-oxalamide-dihalo-bridged-copper-dimers-intra-and-interdimer-interactions-studied-by-single-crystal-esr-spectroscopy
#2
Dijana Zilic, Debdeep Maity, Mario Cetina, Kresimir Molcanov, Zoran Dzolic, Mirta Herak
The detailed single crystal electron spin resonance (ESR) analysis of oxalamide complexes with halogen-bridged copper dimers, supported by X-ray, magnetic susceptibility and powder ESR studies, is reported. Four complexes with two different ligands were synthesized: [CuLA(μ-X)]₂ and [CuLV(μ-X)]₂, where LA = N-(L-alanine methyl ester)-N'-((2-pyridine-2-yl)methyl)oxalamide and LV=N-(L-valine methyl ester)-N'-((2-pyridine-2-yl)methyl)oxalamide, while X=Cl or Br. X-ray analysis shows that geometry at each copper(II) ion is square pyramidal while two pyramids share one base-to-apex edge with parallel basal planes...
June 21, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28636013/new-insights-into-the-solubility-of-graphene-oxide-in-water-and-alcohols
#3
Vadim V Neklyudov, Nail R Khafizov, Igor A Sedov, Ayrat M Dimiev
One of the main advantages of graphene oxide (GO) over its non-oxidized counterpart is its ability to form stable solutions in water and some organic solvents. At the same time, the nature of GO solutions is not completely understood; the existing data are scarce and controversial. Here, we demonstrate that the solubility of GO, and the stability of the as-formed solutions depend not just on the solute and solvent cohesion parameters, as commonly believed, but mostly on the chemical interactions at the GO/solvent interface...
June 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28635961/hypoxia-induced-mobilization-of-nhe6-to-the-plasma-membrane-triggers-endosome-hyperacidification-and-chemoresistance
#4
Fabrice Lucien, Pierre-Paul Pelletier, Roxane R Lavoie, Jean-Michel Lacroix, Sébastien Roy, Jean-Luc Parent, Dominique Arsenault, Kelly Harper, Claire M Dubois
The pH-dependent partitioning of chemotherapeutic drugs is a fundamental yet understudied drug distribution mechanism that may underlie the low success rates of current approaches to counter multidrug resistance (MDR). This mechanism is influenced by the hypoxic tumour microenvironment and results in selective trapping of weakly basic drugs into acidified compartments such as the extracellular environment. Here we report that hypoxia not only leads to acidification of the tumour microenvironment but also induces endosome hyperacidification...
June 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28635621/the-charge-and-spin-transport-properties-in-hexagonal-silicene-nanorings
#5
Ning Xu, Haiyang Zhang, Xiuqiang Wu, Chen Qiao, Jian-Wen Ding
Based on the tight-binding model, charge and spin transport properties of hexagonal silicene rings are investigated within the nonequilibrium Green's function technique. The effects of external electric, magnetic and exchange fields are taken into account. The calculated results reveal that the hexagonal silicene nanorings act as a controllable spin filter. The near-perfect spin polarization can be achieved by adjusting electric, magnetic and exchange fields. The calculated results offer new possibilities for silicene ring based spin nanodevices...
June 21, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28635356/simultaneous-abo-incompatible-living-donor-liver-transplantation-and-splenectomy-without-plasma-exchange-in-china-two-case-reports
#6
Guoyong Chen, Janjun Sun, Sidong Wei, Yongfeng Chen, Gaofeng Tang, Zhantao Xie, Huaen Xu, Janbin Chen, Huibo Zhao, Zhenhua Yuan, Weiwei Wang, Guangbo Liu, Bing Wang, Biao Niu
ABO-incompatible (ABO-i) living-donor liver transplantation (LDLT) is performed if an ABO-compatible graft cannot be obtained. However, a perfect desensitization protocol has not been established worldwide, especially for simultaneous ABO-i LDLT and splenectomy. We herein report two cases of ABO-i LDLT. To the best of our knowledge, this is the first case report of ABO-i LDLT in an adult patient in China. Splenectomy and T-cell-targeted immunosuppression (basiliximab) was used to overcome the blood group barrier in these recipients...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28634802/alkaline-treated-sawdust-as-an-effective-material-for-cationic-dye-removal-from-textile-effluents-under-dynamic-conditions-breakthrough-curve-prediction-and-mechanism-exploration
#7
Ahmed Amine Azzaz, Salah Jellali, Rahma Souissi, Karim Ergaieg, Latifa Bousselmi
This paper deals with the methylene blue molecule (MB) removal from synthetic and real textile wastewaters by alkali-treated orange tree sawdust (ATOS) under different dynamic conditions. Experimental results showed that MB removal efficiencies by ATOS increased when increasing initial dye concentrations and bed depths but decreased with the increase of the applied flow rates with a maximum adsorption capacity of about 110 mg g(-1). Moreover, various empirical models were applied to predict the experimental breakthrough curves (BTCs) and to determine the characteristic adsorption parameters...
June 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28634801/ameliorating-soil-acidity-and-physical-properties-of-two-contrasting-texture-ultisols-with-wastewater-sludge-biochar
#8
Yutong Zong, Yefeng Wang, Ye Sheng, Chengfeng Wu, Shenggao Lu
The production of biochar is a safe and beneficial disposal way for wastewater sludge. The biochar produced from wastewater sludge can be used as soil amendments for improving soil properties and for increasing crop yield. This work investigated the influences of wastewater sludge biochar (WSB) on the pH, exchangeable acidity, and physical properties of strongly acidic Ultisols with contrasting texture (clayey soil and sandy loam). Two soils were mixed with WSB at the rate of 0, 10, 20, and 40 g biochar kg(-1) soil and incubated for 240 days at 75% field water capacity...
June 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28634798/value-of-biochars-from-miscanthus-x-giganteus-cultivated-on-contaminated-soils-to-decrease-the-availability-of-metals-in-multicontaminated-aqueous-solutions
#9
Adeline Janus, Aurélie Pelfrêne, Karin Sahmer, Sophie Heymans, Christophe Deboffe, Francis Douay, Christophe Waterlot
The objective of this study was to evaluate the sorption efficiency of eight biochars, made from Miscanthus x giganteus cultivated on contaminated agricultural soil, in aqueous solutions contaminated with metals alone or mixed with polycyclic aromatic hydrocarbons. These biochars were produced in different pyrolysis conditions (temperature, 400/600 °C; heating rate, 5/10 °C min(-1); duration, 45/90 min) and compared with an uncontaminated commercialized biochar made of wood. The physicochemical characterization of the Miscanthus biochars confirmed the impact of the pyrolysis on the biochar parameters with substantial differences between the biochars in terms of pH, cation exchange capacity, and specific surface area...
June 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28634749/the-king-laryngeal-tube-a-mimic-of-esophageal-intubation-in-the-emergency-department
#10
Daniel B Green, Christopher W Root, Ian R Drexler, Alan C Legasto, Jonathan St George
The King Airway is a temporary airway device used primarily in the pre-hospital setting and typically exchanged for an endotracheal tube upon arrival to the emergency department. Since this usually occurs before imaging, many radiologists are unfamiliar with the King Airway. This lack of familiarity can have important consequences for the patient and treating team. The purpose of this article is to raise awareness of the King Airway among radiologists, emphasize appropriate positioning, and review the imaging complications of incorrect positioning...
June 20, 2017: Emergency Radiology
https://www.readbyqxmd.com/read/28634472/antifungal-activity-against-filamentous-fungi-of-ts1-a-multifunctional-toxin-from-tityus-serrulatus-scorpion-venom
#11
Welligton M Santussi, Karla C F Bordon, Ana P N Rodrigues Alves, Camila T Cologna, Suraia Said, Eliane C Arantes
Antimicrobial peptides (AMPs) are ubiquitous and multipotent components of the innate immune defense arsenal used by both prokaryotic and eukaryotic organisms. The search for new AMPs has increased in recent years, due to the growing development of microbial resistance to therapeutical drugs. In this work, we evaluate the effects of Tityus serrulatus venom (Tsv), its fractions and its major toxin Ts1, a beta-neurotoxin, on fungi growth. The fractions were obtained by ion-exchange chromatography of Tsv. The growth inhibition of 11 pathogenic and non-pathogenic filamentous fungi (Aspergillus fumigatus, A...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28634400/chronic-treatment-with-cisplatin-induces-chemoresistance-through-the-tip60-mediated-fanconi-anemia-and-homologous-recombination-repair-pathways
#12
Wen-Pin Su, Yen-Chih Ho, Cheng-Kuei Wu, Sen-Huei Hsu, Jia-Lin Shiu, Jheng-Cheng Huang, Song-Bin Chang, Wen-Tai Chiu, Jan-Jong Hung, Tsung-Lin Liu, Wei-Sheng Wu, Pei-Yu Wu, Wu-Chou Su, Jang-Yang Chang, Hungjiun Liaw
The Fanconi anemia pathway in coordination with homologous recombination is essential to repair interstrand crosslinks (ICLs) caused by cisplatin. TIP60 belongs to the MYST family of acetyltransferases and is involved in DNA repair and regulation of gene transcription. Although the physical interaction between the TIP60 and FANCD2 proteins has been identified that is critical for ICL repair, it is still elusive whether TIP60 regulates the expression of FA and HR genes. In this study, we found that the chemoresistant nasopharyngeal carcinoma cells, derived from chronic treatment of cisplatin, show elevated expression of TIP60...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28634360/missing-magnetism-in-sr4ru3o10-indication-for-antisymmetric-exchange-interaction
#13
Franziska Weickert, Leonardo Civale, Boris Maiorov, Marcelo Jaime, Myron B Salamon, Emanuela Carleschi, André M Strydom, Rosalba Fittipaldi, Veronica Granata, Antonio Vecchione
Metamagnetism occuring inside a ferromagnetic phase is peculiar. Therefore, Sr4Ru3O10, a T C  = 105 K ferromagnet, has attracted much attention in recent years, because it develops a pronounced metamagnetic anomaly below T C for magnetic fields applied in the crystallographic ab-plane. The metamagnetic transition moves to higher fields for lower temperatures and splits into a double anomaly at critical fields H c1 = 2.3 T and H c2 = 2.8 T, respectively. Here, we report a detailed study of the different components of the magnetization vector as a function of temperature, applied magnetic field, and varying angle in Sr4Ru3O10...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28634298/analyses-of-pde-regulated-phosphoproteomes-reveal-unique-and-specific-camp-signaling-modules-in-t-cells
#14
Michael-Claude G Beltejar, Ho-Tak Lau, Martin G Golkowski, Shao-En Ong, Joseph A Beavo
Specific functions for different cyclic nucleotide phosphodiesterases (PDEs) have not yet been identified in most cell types. Conventional approaches to study PDE function typically rely on measurements of global cAMP, general increases in cAMP-dependent protein kinase (PKA), or the activity of exchange protein activated by cAMP (EPAC). Although newer approaches using subcellularly targeted FRET reporter sensors have helped define more compartmentalized regulation of cAMP, PKA, and EPAC, they have limited ability to link this regulation to downstream effector molecules and biological functions...
June 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28634234/the-thioreduction-component-ccmg-confers-efficiency-and-the-heme-ligation-component-ccmh-ensures-stereo-specificity-during-cytochrome-c-maturation
#15
Andreia F Verisssimo, Bahia Khalfaoui-Hassani, Josephine Hwang, Stefan Steimle, Nur Selamoglu, Carsten Sanders, Camilo Khatchikian, Fevzi Daldal
In many Gram-negative bacteria, including Rhodobacter capsulatus, cytochrome c maturation (Ccm) is carried out by a membrane-integral machinery composed of nine proteins (CcmA to I). During this process, the periplasmic thiol-disulfide oxidoreductase DsbA is thought to catalyze the formation of a disulfide bond between the Cys residues at the apocytochrome c heme binding site (CXXCH). Subsequently, a Ccm-specific thioreductive pathway involving CcmG and CcmH reduces this disulfide bond to allow covalent heme ligation...
June 20, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28634209/genetic-evidence-that-%C3%AE-arrestins-are-dispensable-for-the-initiation-of-%C3%AE-2-adrenergic-receptor-signaling-to-erk
#16
Morgan O'Hayre, Kelsie Eichel, Silvia Avino, Xuefeng Zhao, Dana J Steffen, Xiaodong Feng, Kouki Kawakami, Junken Aoki, Karen Messer, Roger Sunahara, Asuka Inoue, Mark von Zastrow, J Silvio Gutkind
The β2-adrenergic receptor (β2AR) has provided a paradigm to elucidate how G protein-coupled receptors (GPCRs) control intracellular signaling, including the discovery that β-arrestins, which bind to ligand-activated GPCRs, are central for GPCR function. We used genome editing, conditional gene deletion, and small interfering RNAs (siRNAs) to determine the roles of β-arrestin 1 (β-arr1) and β-arr2 in β2AR internalization, trafficking, and signaling to ERK. We found that only β-arr2 was essential for β2AR internalization...
June 20, 2017: Science Signaling
https://www.readbyqxmd.com/read/28634183/syk-inhibitors-interfere-with-erythrocyte-membrane-modification-during-p-falciparum-growth-and-suppress-parasite-egress
#17
Antonella Pantaleo, Kristina R Kesely, Maria Carmina Pau, Ioannis Tsamesidis, Evelin Schwarzer, Oleksii A Skorokhod, Huynh D Chien, Marta Ponzi, Lucia Bertuccini, Philip S Low, Francesco M Turrini
Band 3 (a.k.a. the anion exchanger, SLCA1, AE1) constitutes the major attachment site of the spectrin-based cytoskeleton to the erythrocyte's lipid bilayer and thereby contributes critically to the stability of the red cell membrane. During the intra-erythrocytic stage of Plasmodium falciparum's life cycle, band 3 becomes tyrosine phosphorylated in response to oxidative stress, leading to a decrease in its affinity for the spectrin/actin cytoskeleton and causing global membrane destabilization. Because this membrane weakening is hypothesized to facilitate parasite egress and the consequent dissemination of released merozoites throughout the bloodstream, we decided to explore which tyrosine kinase inhibitors might block the kinase-induced membrane destabilization...
June 20, 2017: Blood
https://www.readbyqxmd.com/read/28634126/biosorption-of-high-concentration-cu-ii-by-periphytic-biofilms-and-the-development-of-a-fiber-periphyton-bioreactor-fpbr
#18
Junzhuo Liu, Fengwu Wang, Wantong Wu, Juanjuan Wan, Jiali Yang, Sulin Xiang, Yonghong Wu
In this study, a kind of microbial aggregates: periphytic biofilms were used for Cu removal and immobilized onto fiber for developing a novel bioreactor. Results show that periphyton can effectively entrap Cu at initial concentrations of 2-20mgL(-1) due to the overproduction of EPS and porous structure of periphyton, and biosorption was the primary mechanism of Cu removal. Cu (mainly Cu3(OH)4(2+), Cu2(OH)2(2+) and Cu(2+)) adsorption onto periphytic biofilms followed the pseudo-second order kinetic model. The biosorption process fitted the Freundlich, Langmuir and Dubinin-Radushkevich Isotherm models well and was thermodynamically spontaneous...
June 10, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28634122/mapping-the-binding-interface-in-a-non-covalent-size-variant-of-a-monoclonal-antibody-using-native-mass-spectrometry-hydrogen-deuterium-exchange-mass-spectrometry-and-computational-analysis
#19
Yuetian Yan, Hui Wei, Sutjano Jusuf, Stanley R Krystek, Jie Chen, Guodong Chen, Richard T Ludwig, Li Tao, Tapan K Das
Variants of monoclonal antibody containing an extra light chain has been reported in protein products(1-3). Due to potential impact on potency and immunogenicity, it is important to understand the formation mechanism of such variants so that appropriate control strategies can be implemented to assure product quality. In a model monoclonal antibody, we observed a size variant with an extra light chain non-covalently associated with the monomer (later named as "1.2mer"). The interaction between monomer and the extra light chain was characterized by native spray and hydrogen/deuterium exchange mass spectrometry (HDX MS) techniques...
June 17, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28634057/evaluation-of-the-biotechnological-potential-of-a-novel-purified-protease-bs1-from-bacillus-safensis-s406-on-the-chitin-extraction-and-detergent-formulation
#20
Samiha Mhamdi, Intidhar Bkhairia, Rim Nasri, Tahar Mechichi, Moncef Nasri, Alya Sellami Kamoun
The aim of this study is the production of High-Added Value enzyme for Industrial Uses. An extracellular alkaline stable protease BS1 was purified from a newly bacterium, Bacillus safensis S406, isolated from the Sfax Solar Saltern. BS1 was purified by a process involving sulfate d'ammonium sulfate precipitation, sephadex G-75, Mono-Q anion-exchange chromatography and ultrafiltation. The enzyme has a molecular weight of 24kDa and appeared as a single band on native-PAGE. The optimum pH and temperature values of its proteolytic activity were pH 11...
June 17, 2017: International Journal of Biological Macromolecules
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