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Charles L Francoeur, Margaret Pain, Stephan A Mayer
The field of neurocritical care has evolved tremendously in recent years, a development explained vastly by the advent of neurophysiological monitoring. From basic intracranial pressure measurements to brain tissue oxygenation, microdialysis, cerebral blood flow (CBF), and surface and intracortical electroencephalography (EEG), our ability to detect and control physiologic endpoints of brain function in comatose patients has grown substantially. The integration of these data gave birth to the concept of multimodality monitoring (MMM)...
December 2016: Seminars in Neurology
S López-Moreno, A H Romero, J Mejía-López, A Muñoz
In this work we report a complete structural and magnetic characterization of crystalline MnF2 under pressure obtained using first principle calculations. Density functional theory was used as the theoretical framework, within the generalized gradient approximation plus the Hubbard formalism (GGA+U) necessary to describe the strong correlations present in this material. The vibrational, the magnetic exchange couplings and the structural characterization of MnF2 in the rutile ground state structure and potential high pressure phases are reported...
November 29, 2016: Physical Chemistry Chemical Physics: PCCP
C Ritter, A Provino, P Manfrinetti, A K Pathak
An investigation on the ground state magnetism of CeScSi, CeScGe (tetragonal CeScSi-type, tI12, space group I4/mmm) by temperature-dependent powder neutron diffraction has been carried out, as debated and controversial data regarding the low temperature magnetic behaviours of these two compounds were reported. Our studies reveal that, while cooling, long-range magnetic ordering in CeScSi and CeScGe takes place by a two-step process. A first transition leads to a magnetic structure with the Ce moments aligned ferromagnetically onto two neighbouring tetragonal basal a-b planes of the CeScSi-type structure; the double layers are then antiferromagnetically coupled to each other along the c-axis...
November 24, 2016: Journal of Physics. Condensed Matter: An Institute of Physics Journal
Márcia Isabel Bittencourt-Mernak, Nathália Montouro Pinheiro, Fernanda P Roncon Santana, Marina P Guerreiro, Beatriz Mangueira Saraiva-Romanholo, Simone S Grecco, Luciana C Caperuto, Raphael J F Felizardo, Niels Olsen Saraiva Câmara, Iolanda F L Calvo Tibério, Mílton A Martins, João Henrique G Lago, Carla Máximo Prado
BACKGROUND AND PURPOSE: Sakuranetin is the main isolate flavonoid from Baccharis retusa (Asteraceae) leaves and exhibits anti-inflammatory and anti-oxidative activities. Acute respiratory distress syndrome is an acute failure of the respiratory system for which effective treatment is urgently necessary. This study investigated the preventive and therapeutic effects of sakuranetin on lipopolysaccharide (LPS)-induced acute lung injury (ALI) in mice. EXPERIMENTAL APPROACH: Animals were treated with intranasal sakuranetin 30 minutes before or 6 hours after instillation of LPS...
November 23, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
Martin Valldor, Patrick Merz, Yurii Prots, Yves Watier, Walter Schnelle
Reacting Cs2O1.3, TiTe, TiO2, and Te under inert conditions gives powders of Cs1-xTi2Te2O (x ≈ 0.2). Small single crystals of the same phase were obtained from a CsCl salt melt in closed ampoules. This cesium dititanium ditelluride oxide (P4/mmm, a = 4.0934(3) Å, c = 8.9504(9) Å) is isostructural to CeCr2Si2C and contains layers of face-sharing trans-TiTe4O2 octahedra that are separated by Cs. As Ti occupies only one crystallographic site, its average oxidation state is +2.6, for the Cs deficit x = 0.2...
October 14, 2016: Inorganic Chemistry
Haiyang Zhang, Ruili Guo, Jinpeng Hou, Zhong Wei, Xueqin Li
In this study, a carbon nanotubes composite coated with N-isopropylacrylamide hydrogel (NIPAM-CNTs) has been synthesized. Mixed matrix membranes (MMMs) were fabricated by incorporating NIPAM-CNTs composite filler into poly(ether-block-amide) (Pebax® MH 1657) matrix for efficient CO2 separation. The as-prepared NIPAM-CNTs composite filler mainly plays two roles: i) The extraordinary smooth one-dimensional nanochannels of CNTs act as the highways to accelerate CO2 transport through membranes, increasing CO2 permeability; ii) The NIPAM hydrogel layer coated on the outer walls of CNTs acts as the super water absorbent to increase water content of membranes, appealing both CO2 permeability and CO2/gas selectivity...
October 10, 2016: ACS Applied Materials & Interfaces
Mirella Luciani, Gisella Armillotta, Laura Manna, Antonella Ciarelli, Tiziana Di Febo, Ivanka Krasteva, Attilio Pini, Flavio Sacchini, Anna Rita D'Angelo
An immunohistochemical (IHC) technique was optimised using a monoclonal antibody (MAb) to detect Mycoplasma mycoides subsp. mycoides (Mmm), the agent of Contagious Bovine Pleuropneumonia (CBPP), in sections of lung tissue. A panel of MAbs was produced and screened for Mmm speci city and for cross-reactivity against other mycoplasmas belonging and not belonging to the Mycoplasma mycoides cluster, using in parallel indirect ELISA (i-ELISA) and Immunoblotting (IB). Based on i-ELISA and IB characterization data, 1 MAb (clone 3G10E7) was selected and its highest a nity vs Mmm was con rmed by the Quartz Crystal Microbalance (QCM) technology...
July 15, 2016: Veterinaria Italiana
Xiaofeng Li, Hanyu Liu, Feng Peng
Guided by a simple strategy in search of new superconducting materials, we have performed extensive simulations on crystal structures and electronic properties of Tc-H compounds at high pressures. Three stoichiometries, namely TcH, TcH2, and TcH3, were predicted to be stable under high pressure. The chemical bonding characters of Tc-H compounds were investigated by introducing the electron localization function and electronic projected density of states, which show that the stable Tc-H compounds including TcH, TcH2 and TcH3 are all classified as ionic crystals as a result of Tc → H charge transfer...
October 10, 2016: Physical Chemistry Chemical Physics: PCCP
Denys Pavlenko, Esmée van Geffen, Mies J van Steenbergen, Griet Glorieux, Raymond Vanholder, Karin G F Gerritsen, Dimitrios Stamatialis
Hemodialysis is a widely available and well-established treatment for patients with End Stage Renal Disease (ESRD). However, although life-sustaining, patient mortality rates are very high. Several recent studies corroborated the link between dialysis patients' outcomes and elevated levels of protein-bound uremic toxins (PBUT) that are poorly removed by conventional hemodialysis. Therefore, new treatments are needed to improve their removal. Recently, our group showed that the combination of dialysis and adsorption on one membrane, the mixed matrix membrane (MMM), can effectively remove those toxins from human plasma...
October 5, 2016: Scientific Reports
Lise Pascale, Marco Truccato, Lorenza Operti, Angelo Agostino
High-Tc superconducting cuprates (HTSC) such as YBa2Cu3O7 - x (YBCO) are promising candidates for solid-state THz applications based on stacks of intrinsic Josephson junctions (IJJs) with atomic thickness. In view of future exploitation of IJJs, high-quality superconducting YBCO tape-like single crystals (whiskers) have been synthesized from Ca-Al-doped precursors in the presence of Te. The main aim of this paper is to determine the importance of the simultaneous use of Al, Te and Ca in promoting YBCO whiskers growth with good superconducting properties (Tc = 79-84 K)...
October 1, 2016: Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials
I Klawonn, N Nahar, J Walve, B Andersson, M Olofsson, J B Svedén, S Littmann, M J Whitehouse, M M M Kuypers, H Ploug
We analysed N2 - and carbon (C) fixation in individual cells of Baltic Sea cyanobacteria by combining stable isotope incubations with secondary ion mass spectrometry (SIMS). Specific growth rates based on N2 - and C-fixation were higher for cells of Dolichospermum spp. than for Aphanizomenon sp. and Nodularia spumigena. The cyanobacterial biomass, however, was dominated by Aphanizomenon sp., which contributed most to total N2 -fixation in surface waters of the Northern Baltic Proper. N2 -fixation by Pseudanabaena sp...
October 1, 2016: Environmental Microbiology
Sruti V Prathivadhi-Bhayankaram, Jianhao Ning, Michael Mimlitz, Carolyn Taylor, Erin Gross, Michael Nichols, Jochen Guck, Andrew E Ekpenyong
Although most cancer drugs target the proliferation of cancer cells, it is metastasis, the complex process by which cancer cells spread from the primary tumor to other tissues and organs of the body where they form new tumors, that leads to over 90% of all cancer deaths. Thus, there is an urgent need for anti-metastasis therapy. Surprisingly, emerging evidence suggests that certain anti-cancer drugs such as paclitaxel and doxorubicin can actually promote metastasis, but the mechanism(s) behind their pro-metastatic effects are still unclear...
October 28, 2016: Biochemical and Biophysical Research Communications
Udumula Subbarao, Soumyabrata Roy, Saurav Ch Sarma, Sumanta Sarkar, Vidyanshu Mishra, Yatish Khulbe, Sebastian C Peter
Single crystals (SCs) of the compounds Eu3Ag2In9 and EuCu2Ge2 were synthesized through the reactions run in liquid indium. Eu3Ag2In9 crystallizes in the La3Al11 structure type [orthorhombic space group (SG) Immm] with the lattice parameters: a = 4.8370(1) Å, b = 10.6078(3) Å, and c = 13.9195(4) Å. EuCu2Ge2 crystallizes in the tetragonal ThCr2Si2 structure type (SG I4/mmm) with the lattice parameters: a = b = 4.2218(1) Å, and c = 10.3394(5) Å. The crystal structure of Eu3Ag2In9 is comprised of edge-shared hexagonal rings consisting of indium...
October 17, 2016: Inorganic Chemistry
Yunkun Zhang, Lailei Wu, Biao Wan, Yangzheng Lin, Qingyang Hu, Yan Zhao, Rui Gao, Zhiping Li, Jingwu Zhang, Huiyang Gou
First-principles calculations were performed to understand the structural stability, synthesis routes, mechanical and electronic properties of diverse ruthenium nitrides. RuN with a new I-4m2 symmetry stabilized by pressure is found to be energetically preferred over the experimental NaCl-type and ZnS-type ones. The Pnnm-RuN2 is found to be stable above 1.1 GPa, in agreement with the experimental results. Specifically, new stoichiometries like RuN3 and RuN4 are proposed firstly to be thermodynamically stable, and the dynamical and mechanical stabilities of the newly predicted structures have been verified by checking their phonon spectra and elastic constants...
2016: Scientific Reports
Sourav Marik, Madhu Chennabasappa, Javier Fernández-Sanjulián, Emmanuel Petit, Olivier Toulemonde
A study of the structure-composition-properties correlation is reported for the oxygen-deficient SrFe1-xCoxO2.75-δ (x = 0.1-0.85) materials. The introduction of Co in the parent SrFeO2.75 (Sr4Fe4O11) structure revealed an interesting structural transformation. At room temperature (RT), an orthorhombic (space group Cmmm, 2√2ap × 2ap × √2ap type, ap = lattice parameter of the cubic perovskite) → tetragonal (space group P4/mmm, ap × ap × 2ap type) → tetragonal (space group I4/mmm, 2ap × 2ap × 4ap type) structural transformation is observed in parallel with increasing Co content and decreasing oxygen content in the structure...
October 3, 2016: Inorganic Chemistry
Yu-Heng Deng, Jung-Tsai Chen, Chia-Hao Chang, Kuo-Sung Liao, Kuo-Lun Tung, William E Price, Yusuke Yamauchi, Kevin C-W Wu
Despite much progress in the development of mixed matrix membranes (MMMs) for many advanced applications, the synthesis of MMMs without particle agglomeration or phase separation at high nanofiller loadings is still challenging. In this work, we synthesized nanoporous zeolitic imidazole framework (ZIF-8) nanoparticles with a particle size of 60 nm and a pore size of 0.34 nm in water and directly added them into an aqueous solution of the organic polymer poly(vinyl alcohol) (PVA) without an intermediate drying process...
October 4, 2016: Angewandte Chemie
Henri Chabrol, Charline Beck, Stéphanie Laconi
The Marijuana Motives Measure (MMM), which is derived from a scale measuring alcohol use motives, has been the main instrument used to explore the role of motives in cannabis use and related problems. Two studies attempted to developed specific cannabis use motives but none of them showed a unique association to cannabis use and problems when controlling for MMM motives. The aim of our study was to examine if additional motives contributed to problematic use beyond MMM motives and psychopathological symptoms...
August 10, 2016: Addictive Behaviors
Muhammad Nidzhom Zainol Abidin, Pei Sean Goh, Ahmad Fauzi Ismail, Mohd Hafiz Dzarfan Othman, Hasrinah Hasbullah, Noresah Said, Siti Hamimah Sheikh Abdul Kadir, Fatmawati Kamal, Mohd Sohaimi Abdullah, Be Cheer Ng
Poly (citric acid)-grafted-MWCNT (PCA-g-MWCNT) was incorporated as nanofiller in polyethersulfone (PES) to produce hemodialysis mixed matrix membrane (MMM). Citric acid monohydrate was polymerized onto the surface of MWCNTs by polycondensation. Neat PES membrane and PES/MWCNTs MMMs were fabricated by dry-wet spinning technique. The membranes were characterized in terms of morphology, pure water flux (PWF) and bovine serum albumin (BSA) protein rejection. The grafting yield of PCA onto MWCNTs was calculated as 149...
November 1, 2016: Materials Science & Engineering. C, Materials for Biological Applications
Martin Mwirigi, Isabel Nkando, Moses Olum, Samuel Attah-Poku, Horace Ochanda, Emil Berberov, Andrew Potter, Volker Gerdts, Jose Perez-Casal, Hezron Wesonga, Reuben Soi, Jan Naessens
Contagious Bovine Pleuropneumonia (CBPP) is a severe respiratory disease caused by Mycoplasma mycoides subsp. mycoides (Mmm) which is widespread in Africa. The capsule polysaccharide (CPS) of Mmm is one of the few identified virulence determinants. In a previous study, immunization of mice against CPS generated antibodies, but they were not able to prevent multiplication of Mmm in this model animal. However, mice cannot be considered as a suitable animal model, as Mmm does not induce pathology in this species...
October 1, 2016: Veterinary Immunology and Immunopathology
Sébastien Lacroix, Christine Des Rosiers, Mathieu Gayda, Anna Nozza, Éric Thorin, Jean-Claude Tardif, Anil Nigam
Cardiovascular risk factors are known to exacerbate high-saturated fatty acid meal (HSFAM)-induced endothelial dysfunction, but the influence of subclinical metabolic dysregulations and the acute impact of a single mixed Mediterranean-type meal (MMM) remains unknown. Thus, this study has the objective to evaluate the metabolic and vascular effect of such meals in healthy subjects with or without subclinical fasting metabolic dysregulations. Twenty-eight healthy males without overt cardiovascular risk factors randomly ingested 1 of 2 isocaloric meals on separate days...
August 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
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