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https://www.readbyqxmd.com/read/28231681/noninvasive-transcranial-direct-current-stimulation-tdcs-for-the-treatment-of-orofacial-pain
#1
(no author information available yet)
OBJECTIVE: tDCS is a promising method for the treatment of chronic pain. Electrode placement locations must be chosen in accordance with the density and the time course of the current in order to prevent pathological changes in the underlying tissue. In order to reduce current spatial variability, more electrodes of the same polarity are placed in a circle around the second electrode of the opposite polarity. The applied current produced the greatest changes directly beneath the electrodes: the cathode reduces the excitability of cortical neurons, while the anode has the opposite effect...
October 24, 2016: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/28231542/in-vitro-biocompatibility-and-proliferative-effects-of-polar-and-non-polar-extracts-of-cucurbita-ficifolia-on-human-mesenchymal-stem-cells
#2
Balakrishnan Aristatile, Ghedeir M Alshammari
Cucurbita ficifolia (C. ficifolia) has been traditionally known for its medicinal properties as an antioxidant, anti-diabetic and anti-inflammatory agent. However, there has been an enduring attention towards the identification of unique method, to isolate the natural components for therapeutic applications. Our study focuses on different polar and non-polar solvents (methanol, hexane and chloroform) to extract the bioactive components from C. ficifolia (pumpkin) and to study the biocompatibility and cytotoxicity effects on human bone marrow-mesenchymal stem cells (hBM-MSCs)...
February 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28231529/new-enantioselective-lc-method-development-and-validation-for-the-assay-of-modafinil
#3
Marianna Harvanová, Taťána Gondová
For the first time, a new, fast and sensitive chromatographic method for the separation and determination of modafinil enantiomers was developed on chiral stationary phase with macrocyclic glycopeptide teicoplanin in the polar organic mode. The effect of the mobile phase composition and column temperature on the retention and enantioseparation were studied. The separation was performed using a Chirobiotic T column (250×4.6mm, 5μm) with methanol and triethylamine (100/0.05, v/v) as the mobile phase at a flow rate of 1...
February 16, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28231312/analysis-of-the-t-cell-response-to-zika-virus-and-identification-of-a-novel-cd8-t-cell-epitope-in-immunocompetent-mice
#4
Ryan D Pardy, Maaran M Rajah, Stephanie A Condotta, Nathan G Taylor, Selena M Sagan, Martin J Richer
Zika virus (ZIKV) is an emerging arbovirus of the Flaviviridae family. Although ZIKV infection is typically mild and self-limiting in healthy adults, infection has been associated with neurological symptoms such as Guillain-Barré syndrome, and a causal link has been established between fetal microcephaly and ZIKV infection during pregnancy. These risks, and the magnitude of the ongoing ZIKV pandemic, have created an urgent need for the development of animal models to study the immune response to ZIKV infection...
February 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28231272/vibrio-japonicus-sp-nov-a-novel-member-of-the-nereis-clade-in-the-genus-vibrio-isolated-from-the-coast-of-japan
#5
Hiroyasu Doi, Ikuko Osawa, Hayamitsu Adachi, Manabu Kawada
A novel Vibrio strain, JCM 31412T, was isolated from seawater collected from the Inland Sea (Setonaikai), Japan, and characterized as a Gram-negative, oxidase-positive, catalase-negative, facultatively anaerobic, motile, ovoid-shaped bacterium with one polar flagellum. Based on 16S rDNA gene identity, strain JCM 31412T showed a close relationship with type strains of Vibrio brasiliensis (LMG 20546T, 98.2% identity), V. harveyi (NBRC 15634T, 98.2%), V. caribbeanicus (ATCC BAA-2122T, 97.8%) and V. proteolyticus (NBRC 13287T, 97...
2017: PloS One
https://www.readbyqxmd.com/read/28231240/galectin-3-histone-deacetylases-and-hedgehog-signaling-possible-convergent-targets-in-schistosomiasis-induced-liver-fibrosis
#6
REVIEW
Felipe Leite de Oliveira, Katia Carneiro, José Marques Brito, Mariana Cabanel, Jonathas Xavier Pereira, Ligia de Almeida Paiva, Wingkin Syn, Neil C Henderson, Marcia Cury El-Cheikh
Schistosomiasis affects approximately 240 million people in the world. Schistosoma mansoni eggs in the liver induce periportal fibrosis and hepatic failure driven by monocyte recruitment and macrophage activation, resulting in robust Th2 response. Here, we suggested a possible involvement of Galectin-3 (Gal-3), histone deacetylases (HDACs), and Hedgehog (Hh) signaling with macrophage activation during Th1/Th2 immune responses, fibrogranuloma reaction, and tissue repair during schistosomiasis. Gal-3 is highly expressed by liver macrophages (Kupffer cells) around Schistosoma eggs...
February 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28231005/synaptic-plasticity-selectively-activated-by-polarization-dependent-energy-efficient-ion-migration-in-an-ultrathin-ferroelectric-tunnel-junction
#7
Chansoo Yoon, Ji Hye Lee, Sangik Lee, Ji Hoon Jeon, Jun Tae Jang, Dae Hwan Kim, Young Heon Kim, Bae Ho Park
Selectively activated inorganic synaptic devices, showing a high on/off ratio, ultrasmall dimensions, low power consumption, and short programming time, are required to emulate the functions of high-capacity and energy-efficient reconfigurable human neural systems combining information storage and processing ( Li et al. Sci. Rep. 2014 , 4 , 4096 ). Here, we demonstrate that such a synaptic device is realized using a Ag/PbZr0.52Ti0.48O3 (PZT)/La0.8Sr0.2MnO3 (LSMO) ferroelectric tunnel junction (FTJ) with ultrathin PZT (thickness of ∼4 nm)...
February 24, 2017: Nano Letters
https://www.readbyqxmd.com/read/28230993/ground-state-properties-of-the-polar-alkali-metal-ytterbium-and-alkaline-earth-metal-ytterbium-molecules-a-comparative-study
#8
Qinqin Shao, Lijuan Deng, Xiao Dong Xing, Dezhi Gou, Xiaoyu Kuang, Hui Li
The accurate knowledge of electronic properties is important for creating and manufacturing ultracold molecules. We report here the ab initio quantum chemistry calculations on the properties of alkali-metal-ytterbium AM-Yb (AM = Li, Na, K, Rb, Cs) and alkaline-earth-metal-ytterbium AEM-Yb (AEM = Be, Mg, Ca, Sr, Ba) molecules for their electronic ground state. The potential energy curves (PECs) and permanent dipole moments (PDMs) are calculated based on the multi-reference configuration interaction (MRCI) level of theory, where the core-valence correlations and scalar relativistic effects are included...
February 23, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28230979/simple-expendable-3d-printed-microfluidic-systems-for-sample-preparation-of-petroleum
#9
Erica Megumi Kataoka, Rui Cesar Murer, Jandyson Machado Santos, Rogerio Mesquita de Carvalho, Marcos Nogueira Eberlin, Fabio Augusto, Ronei Jesus Poppi, Angelo Luiz Gobbi, Leandro Wang Hantao
In this study, we introduce a simple protocol to manufacture disposable, 3D-printed microfluidic systems for sample preparation of petroleum. Such platform is produced with a consumer-grade 3D-printer, using fused deposition modeling. Successful incorporation of solid-phase extraction (SPE) to microchip was ensured by facile 3D element integration using proposed approach. This 3D-printed μSPE device was applied to challenging matrices in oil & gas industry, such as crude oil and oil-brine emulsions. Case studies investigated important limitations of non-silicon and non-glass microchips, namely, resistance to nonpolar solvents and conservation of sample integrity...
February 23, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28230915/a-singlet-oxygen-generating-agent-by-chirality-dependent-plasmonic-shell-satellite-nanoassembly
#10
Fengli Gao, Maozhong Sun, Wei Ma, Xiaoling Wu, Liqiang Liu, Hua Kuang, Chuanlai Xu
Photodynamic therapy (PDT) agent, which generates singlet oxygen ((1) O2 ) under light, has attracted significant attention for its broad biological and medical applications. Here, DNA-driven shell-satellite (SS) gold assemblies as chiral photosensitizers are first fabricated. The chiral plasmonic nanostructure, coupling with cysteine enantiomers on its surface, exhibits intense chiroplasmonic activities (-40.2 ± 2.6 mdeg) in the visible region. These chiral SS nanoassemblies have high reactive oxygen species generating efficiency under circular polarized light illumination, resulting in a (1) O2 quantum yield of 1...
February 23, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28230869/a-combined-high-temperature-experimental-and-theoretical-kinetic-study-of-the-reaction-of-dimethyl-carbonate-with-oh-radicals
#11
Fethi Khaled, Binod Raj Giri, Milán Szőri, Tam V-T Mai, Lam K Huynh, Aamir Farooq
The reaction kinetics of dimethyl carbonate (DMC) and OH radicals were investigated behind reflected shock waves over the temperature range of 872-1295 K and at pressures near 1.5 atm. Reaction progress was monitored by detecting OH radicals at 306.69 nm using a UV laser absorption technique. The rate coefficients for the reaction of DMC with OH radicals were extracted using a detailed kinetic model developed by Glaude et al. (Proc. Combust. Inst. 2005, 30(1), 1111-1118). The experimental rate coefficients can be expressed in Arrhenius form as: kexpt'l = 5...
February 23, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28230867/ultrafast-electron-and-hole-transfer-dynamics-of-a-solar-cell-dye-containing-hole-acceptors-on-mesoporous-tio2-and-al2o3
#12
Mirko Scholz, Oliver Flender, Gerrit Boschloo, Kawon Oum, Thomas Lenzer
The stability of dye cations against recombination with conduction band electrons in mesoporous TiO2 electrodes is a key property for improving light harvesting in dye-sensitised solar cells. Using ultrafast transient broadband absorption spectroscopy, we monitor efficient intramolecular hole transfer in the solar cell dye E6 having two peripheral triarylamine acceptors. After photoexcitation, two hole transfer mechanisms are identified: a concerted mechanism for electron injection and hole transfer (2.4 ps) and a sequential mechanism with time constants of 3...
February 23, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28230746/oxidation-of-5-chloromethylfurfural-cmf-to-2-5-diformylfuran-dff
#13
Ana I Vicente, Jaime A S Coelho, Svilen P Simeonov, Hristina I Lazarova, Margarita D Popova, Carlos A M Afonso
2,5-Diformylfuran (DFF) is an important biorenewable building block, namely for the manufacture of new polymers that may replace existing materials derived from limited fossil fuel resources. The current reported methods for the preparation of DFF are mainly derived from the oxidation of 5-hydroxymethylfurfural (HMF) and, to a lesser extent, directly from fructose. 5-Chloromethylfurfural (CMF) has been considered an alternative to HMF as an intermediate building block due to its advantages regarding stability, polarity, and availability from glucose and cellulose...
February 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28230354/chemical-modification-of-semiconductor-surfaces-for-molecular-electronics
#14
Ayelet Vilan, David Cahen
Inserting molecular monolayers within metal/semiconductor interfaces provides one of the most powerful expressions of how minute chemical modifications can affect electronic devices. This topic also has direct importance for technology as it can help improve the efficiency of a variety of electronic devices such as solar cells, LEDs, sensors, and possible future bioelectronic ones. The review covers the main aspects of using chemistry to control the various aspects of interface electrostatics, such as passivation of interface states and alignment of energy levels by intrinsic molecular polarization, as well as charge rearrangement with the adjacent metal and semiconducting contacts...
February 23, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28230328/higher-order-oligomerization-of-the-licensing-orc4-protein-is-required-for-polar-body-extrusion-in-murine-meiosis
#15
Hieu Nguyen, Nicholas G James, Lynn Nguyen, Thien P Nguyen, Cindy Vuong, Michael Ortega, W Steven Ward
We have previously shown that the DNA replication licensing factor ORC4 forms a cage around the chromosomes that are extruded in both polar bodies during murine oogenesis, but not around the chromosomes that are retained in the oocyte or around the sperm chromatin. We termed this structure the ORC4 cage. Here, we tested whether the formation of the ORC4 cage is necessary for polar body extrusion (PBE). We first experimentally forced oocytes to extrude sperm chromatin as a pseudo-polar body and found that under these conditions the sperm chromatin did become enclosed in an ORC4 cage...
February 23, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28230220/small-molecule-activation-sbf3-auto-ionization-supported-by-transfer-and-mesoionic-nhc-rearrangement
#16
Blaž Alič, Aleš Štefančič, Gašper Tavčar
The reactivity of antimony trifluoride, SbF3, in non-polar aprotic solvents has been unexplored due to its negligible solubility. The reaction of the [SbF3(tmen)] complex (2) with the N-heterocyclic carbene, 1,3-bis(2,6-diisopropylphenyl)imidazole-2-ylidene, (L(Dipp)), probably leads to the formation of a neutral [(L(Dipp))SbF3] intermediate (3) in non-polar solvents. Mild heat treatment of the reaction mixture unexpectedly activates the SbF3 molecules to undergo the auto-ionization reaction. In this process, one of the (L(Dipp)) ligands undergoes rearrangement into the mesoionic carbene (MIC) and further coordinates to the cation to form [(L(Dipp))2SbF2](+)[SbF4](-), product (4)...
February 23, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28230215/graphene-modulated-photo-absorption-in-adsorbed-azobenzene-monolayers
#17
Qiang Fu, Caterina Cocchi, Dmitrii Nabok, Andris Gulans, Claudia Draxl
The impact of graphene on the photo-absorption properties of trans- and cis-azobenzene monolayers is studied in the framework of density-functional theory and many-body perturbation theory. We find that, despite the weak hybridization between the electronic bands of graphene and those of the azobenzene monolayers, graphene remarkably modulates the absorption spectra of the adsorbates. The excitation energies are affected via two counteracting mechanisms: substrate polarization reduces the band-gap of azobenzene, and enhanced dielectric screening weakens the attractive interaction between electrons and holes...
February 22, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28230212/establishment-of-planar-cell-polarity-is-coupled-to-regional-cell-cycle-exit-and-cell-differentiation-in-the-mouse-utricle
#18
Xiaoyu Yang, Xiaoqing Qian, Rui Ma, Xinwei Wang, Juanmei Yang, Wenwei Luo, Ping Chen, Fanglu Chi, Dongdong Ren
Sensory hair cells are coordinately oriented within each inner ear sensory organ to exhibit a particular form of planar cell polarity (PCP) necessary for mechanotransduction. However, the developmental events associated with establishing PCP in the vestibule are unclear, hindering data interpretation and employment of the vestibule for PCP studies. Herein, we investigated PCP of the mouse vestibular organs. We further characterised cell cycle exit, cell differentiation, and PCP establishment in the utricle...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230210/synergistic-suppression-of-autoimmune-arthritis-through-concurrent-treatment-with-tolerogenic-dc-and-msc
#19
Rong Li, Yujuan Zhang, Xiufen Zheng, Shanshan Peng, Keng Yuan, Xusheng Zhang, Weiping Min
Rheumatoid arthritis (RA) is an autoimmune disease characterized by progressive immune-mediated joint deterioration. Current treatments are not antigen specific and are associated with various adverse. We have previously demonstrated that tolerogenic dendritic cells (Tol-DC) are potent antigen-specific immune regulators, which hold great promise in immunotherapy of autoimmune diseases. In this study, we aimed to develop new immunotherapy by combining Tol-DC and mesenchymal stem cells (MSC). We demonstrated that RelB gene silencing resulted in generation of Tol-DC that suppressed T cell responses and selectively promoted Treg generation...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230153/unconventional-high-performance-laser-protection-system-based-on-dichroic-dye-doped-cholesteric-liquid-crystals
#20
Wanshu Zhang, Lanying Zhang, Xiao Liang, Le Zhou, Jiumei Xiao, Li Yu, Fasheng Li, Hui Cao, Kexuan Li, Zhou Yang, Huai Yang
High-performance and cost-effective laser protection system is of crucial importance for the rapid advance of lasers in military and civilian fields leading to severe damages of human eyes and sensitive optical devices. However, it is crucially hindered by the angle-dependent protective effect and the complex preparation process. Here we demonstrate that angle-independence, good processibility, wavelength tunability, high optical density and good visibility can be effectuated simultaneously, by embedding dichroic anthraquinone dyes in a cholesteric liquid crystal matrix...
February 23, 2017: Scientific Reports
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