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https://www.readbyqxmd.com/read/29346829/intraoperative-seizures-in-awake-craniotomy-for-perirolandic-glioma-resections-that-undergo-cortical-mapping
#1
Chikezie Ikechukwu Eseonu, Jordina Rincon-Torroella, Young M Lee, Karim ReFaey, Punita Tripathi, Alfredo Quinones-Hinojosa
BACKGROUND:  Perirolandic motor area gliomas present invasive eloquent region tumors within the precentral gyrus that are difficult to resect without causing neurologic deficits. STUDY AIMS:  This study evaluates the role of awake craniotomy and motor mapping on neurologic outcome and extent of resection (EOR) of tumor in the perirolandic motor region. It also analyzes preoperative risk factors for intraoperative seizures. METHODS:  We evaluated 57 patients who underwent an awake craniotomy for a perirolandic motor area eloquent region glioma...
January 18, 2018: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/29346731/direct-polymerization-of-the-arsenic-drug-penao-to-obtain-nanoparticles-with-high-thiol-reactivity-and-anti-cancer-efficiency
#2
Janina-Miriam Noy, Hongxu Lu, Philip Hogg, Jia-Lin Yang, Martina H Stenzel
PENAO (4-(N-(S-penicillaminylacetyl)amino) phenylarsonous acid), which is a mitochondria inhibitor that reacts with adenine nucleotide translocator (ANT), is currently being trialed in patients with solid tumors. To increase the stability of the drug, the formation of nanoparticles has been proposed. Herein, the direct synthesis of polymeric micelles based on the anti-cancer drug PENAO is presented. PENAO is readily available for amidation reaction to form PENAO MA (4-(N-(S-penicillaminylacetyl) amino) phenylarsonous acid methacrylamide) which undergoes RAFT (reversible addition fragmentation chin transfer) polymerization with poly(polyethylene glycol methyl ether methacrylate) (PEGMA) as comonomer and poly(methylmethacrylate) (pMMA) as chain transfer agent, resulting in p(MMA)-b-p(PEG-co-PENAO) block copolymers with 3-15 wt...
January 18, 2018: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29346725/rapid-chemical-vapor-infiltration-of-silicon-carbide-minicomposites-at-atmospheric-pressure
#3
Kenneth Petroski, Shannon Poges, Chris Monteleone, Joseph Grady, Ram Bhatt, Steven L Suib
The chemical vapor infiltration technique is one of the most popular for the fabrication of the matrix portion of a ceramic matrix composite. This work focuses on tailoring an atmospheric pressure deposition of silicon carbide onto carbon fiber tows using the methyltrichlorosilane (CH3SiCl3) and H2 deposition system at atmospheric pressure to create minicomposites faster than low pressure systems. Adjusting the flow rate of H2 bubbled through CH3SiCl3 will improve the uniformity of the deposition as well as infiltrate the substrate more completely as the flow rate is decreased...
January 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29346707/tuning-high-temperature-wetting-behavior-of-metal-toward-ultrafine-nanoparticles
#4
Yubing Zhou, Bharath Natarajan, Yanchen Fan, Hua Xie, Chunpeng Yang, Shaomao Xu, Yonggang Yao, Feng Jiang, Qianfan Zhang, Jeffrey W Gilman, Liangbing Hu
The interaction between the metal nanoparticles and their substrate plays a critical role in determining the particle morphology, distribution, and properties. Here we present the pronounced impact of a thin oxide coating to the dispersion of metal nanoparticles on a carbon matrix. We employ Al2O3-supported Pt nanoparticles in comparison with direct synthesis of Pt nanoparticles on bare carbon surfaces. Pt nanoparticles with an average size of ≈2 nm and a size distribution ranging between 0.5 nm and 4.0 nm are synthesized on the Al2O3 coated carbon nanofiber, significantly improved compared to those directly synthesized on bare carbon surface...
January 18, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29346496/melanopsin-system-dysfunction-in-smith-magenis-syndrome-patients
#5
Mirella Telles Salgueiro Barboni, Clarissa Bueno, Balázs Vince Nagy, Patrícia Lobo Maia, Kallene Summer Moreira Vidal, Rosana Cardoso Alves, Russel J Reiter, Fernanda Gaspar do Amaral, José Cipolla-Neto, Dora Fix Ventura
Purpose: Smith-Magenis syndrome (SMS) causes sleep disturbance that is related to an abnormal melatonin profile. It is not clear how the genomic disorder leads to a disturbed synchronization of the sleep/wake rhythm in SMS patients. To evaluate the integrity of the intrinsically photosensitive retinal ganglion cell (ipRGC)/melanopsin system, the transducers of the light-inhibitory effect on pineal melatonin synthesis, we recorded pupillary light responses (PLR) in SMS patients. Methods: Subjects were SMS patients (n = 5), with molecular diagnosis and melatonin levels measured for 24 hours and healthy controls (n = 4)...
January 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29346486/treatment-outcomes-and-adverse-events-following-in-office-angiolytic-laser-with-or-without-concurrent-polypectomy-for-vocal-fold-polyps
#6
Yu-Hsuan Lin, Chi-Te Wang, Feng-Chuan Lin, Li-Jen Liao, Wu-Chia Lo, Po-Wen Cheng
Importance: In-office angiolytic laser procedures have been used successfully as an alternative treatment for vocal fold polyps; little is known in detail about the treatment outcomes and adverse events. Objective: To examine the outcomes and incidence rates of adverse events associated with in-office angiolytic laser procedures with or without concurrent polypectomy as an alternative treatment for vocal fold polyps. Design, Setting, and Participants: Retrospective cohort study at a tertiary medical center...
January 18, 2018: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/29346405/oxytocin-alters-cell-fate-selection-of-rat-neural-progenitor-cells-in-vitro
#7
Arvind Palanisamy, Ramaswamy Kannappan, Zhiqiang Xu, Audrey Martino, Matthew B Friese, Justin D Boyd, Gregory Crosby, Deborah J Culley
Synthetic oxytocin (sOT) is widely used during labor, yet little is known about its effects on fetal brain development despite evidence that it reaches the fetal circulation. Here, we tested the hypothesis that sOT would affect early neurodevelopment by investigating its effects on neural progenitor cells (NPC) from embryonic day 14 rat pups. NPCs expressed the oxytocin receptor (OXTR), which was downregulated by 45% upon prolonged treatment with sOT. Next, we examined the effects of sOT on NPC death, apoptosis, proliferation, and differentiation using antibodies to NeuN (neurons), Olig2 (oligodendrocytes), and GFAP (astrocytes)...
2018: PloS One
https://www.readbyqxmd.com/read/29346398/dual-function-of-edta-with-silver-nanoparticles-for-root-canal-treatment-a-novel-modification
#8
Juan M Martinez-Andrade, Miguel Avalos-Borja, Alfredo R Vilchis-Nestor, Luis O Sanchez-Vargas, Ernestina Castro-Longoria
The chelating and antimicrobial capacity of a novel modification of 17% EDTA with silver nanoparticles (AgNPs) (EDTA-AgNPs) was evaluated in-vitro for root canal treatment (RCT). The EDTA-AgNPs solution was characterized by UV-Vis spectroscopy, ζ-potential and high-resolution transmission electron microscopy (HRTEM). Antimicrobial capacity was evaluated against Candida albicans and Staphylococcus aureus in planktonic and biofilm cells by broth macrodilution (24 h) and XTT assays, (1, 10 and 30 min) respectively...
2018: PloS One
https://www.readbyqxmd.com/read/29346317/liposomal-tricurin-a-synergistic-combination-of-curcumin-epicatechin-gallate-and-resveratrol-repolarizes-tumor-associated-microglia-macrophages-and-eliminates-glioblastoma-gbm-and-gbm-stem-cells
#9
Sumit Mukherjee, Juliet N E Baidoo, Samay Sampat, Andrew Mancuso, Lovena David, Leah S Cohen, Shuiqin Zhou, Probal Banerjee
Glioblastoma (GBM) is a deadly brain tumor with a current mean survival of 12-15 months. Despite being a potent anti-cancer agent, the turmeric ingredient curcumin (C) has limited anti-tumor efficacy in vivo due to its low bioavailability. We have reported earlier a strategy involving the use two other polyphenols, epicatechin gallate (E) from green tea and resveratrol (R) from red grapes at a unique, synergistic molar ratio with C (C:E:R: 4:1:12.5, termed TriCurin) to achieve superior potency against HPV+ tumors than C alone at C:E:R (μM): 32:8:100 (termed 32 μM+ TriCurin)...
January 18, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29346296/highly-sensitive-strain-sensor-based-on-a-novel-mach-zehnder-interferometer-with-tcf-pcf-structure
#10
Xinran Dong, Haifeng Du, Zhi Luo, Ji'an Duan
A highly sensitive strain sensor based on a novel fiber in line Mach-Zehnder interferometer (MZI) was demonstrated experimentally. The MZI was realized by splicing a section of photonic crystal fiber (PCF) with the same length of thin core fiber (TCF) between two single mode fibers (SMFs). The fringe visibility of MZI can reach as high as 20 dB in air. In particular, the strain sensitivity of -1.95 pm/με was achieved within a range from 0 to 4000 με. Furthermore, the strain properties of different length of MZI was investigated...
January 18, 2018: Sensors
https://www.readbyqxmd.com/read/29346015/treatment-of-a-textile-effluent-by-adsorption-with-cork-granules-and-titanium-dioxide-nanomaterial
#11
Margarida Castro, Verónica Nogueira, Isabel Lopes, Maria N Vieira, Teresa Rocha-Santos, Ruth Pereira
This study aimed to explore the efficiency of two adsorbents, cork granules with different granulometry and titanium dioxide nanomaterial, in the removal of chemical oxygen demand (COD), colour and toxicity from a textile effluent. The adsorption assays with cork were unsatisfactory in the removal of chemical parameters however they eliminated the acute toxicity of the raw effluent to Daphnia magna. The assay with TiO2 NM did not prove to be efficient in the removal of colour and COD even after 240 min of contact; nevertheless it also reduced the raw effluent toxicity...
January 18, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29345952/visible-light-enabled-preparation-of-palladium-nanoparticles-and-application-as-catalysts-for-suzuki-miyaura-coupling
#12
Florian Mäsing, Harald Nüsse, Jürgen Klingauf, Armido Studer
Silyl ketones were used for the preparation of palladium nanoparticles (PdNPs) starting with Pd(OAc)2 in dimethylformamide under irradiation with a visible light-emitting diode (LED). Variation of the silyl ketone structure allowed adjustment of the PdNP diameter (1.9 or 5.2 nm). The in situ-formed PdNPs were further stabilized with polyvinylpyrrolidone and then applied as recyclable catalysts in the Suzuki-Miyaura coupling of arylboronic acids with aryl iodides to obtain substituted biphenyls in excellent yields...
January 18, 2018: Organic Letters
https://www.readbyqxmd.com/read/29345928/physicochemical-properties-of-whey-protein-stabilized-astaxanthin-nanodispersion-and-its-transport-via-caco-2-monolayer
#13
Xue Shen, Changhui Zhao, Jing Lu, Mingruo Guo
Astaxanthin nanodispersion was prepared using whey protein isolate (WPI) and polymerized whey protein (PWP) through an emulsification-evaporation technique. The physicochemical properties of the astaxanthin nanodispersion were evaluated and the transport of astaxanthin was assessed using a Caco-2 cell monolayer model. The astaxanthin nanodispersions stabilized by WPI and PWP (2.5%, w/w) had a small particle size (121 ± 4.9 and 80.4 ± 5.9 nm), negative zeta potential (-19.3 ± 1.5 and -35.0 ± 2.2 mV), and high encapsulation efficiency (92...
January 18, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29345900/high-performance-ga2o3-anode-for-lithium-ion-batteries
#14
Xun Tang, Xin Huang, Yongmin Huang, Yong Gou, James Pastore, Yao Yang, Yin Xiong, Jiangfeng Qian, Joel D Brock, Juntao Lu, Li Xiao, Héctor D Abruña, Lin Zhuang
There is a great deal of interest in developing battery systems that can exhibit self-healing behavior, thus enhancing cycleability. Given that gallium (Ga) is a metal that melts near room temperature, we wanted to test if it could be employed as a self-healing anode material for lithium ion batteries (LIBs). However, Ga nanoparticles (NPs), when directly applied, tended to aggregate upon charge/discharge cycling. To address this issue, we employed carbon-coated Ga2O3 NPs as an alternative. By controlling the pH of the precursor solution, highly dispersed and ultra-fine Ga2O3 NPs, embedded in carbon shells, could be synthesized through a hydrothermal carbonization (HTC) method...
January 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29345895/selective-discrimination-of-key-enzymes-of-pathogenic-and-non-pathogenic-bacteria-on-autonomously-reporting-shape-encoded-hydrogel-patterns
#15
Zhiyuan Jia, Issa Sukker, Mareike Müller, Holger Schönherr
This work reports on a new approach to rapidly and selectively detect and discriminate enzymes of pathogenic from those of non-pathogenic bacteria using a patterned autonomously reporting hydrogel on a transparent support, in which the selectivity has been encoded by pattern shape to enable facile detection by a color change at one single wavelength. In particular, enzyme-responsive chitosan hydrogel layers that report the presence of the enzymes β-glucuronidase (β-Gus) and β-galactosidase (β-Gal), produced by the non-virulent Escherichia coli K12 (E...
January 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29345894/a-high-bandwidth-white-light-system-combining-a-micro-led-with-perovskite-quantum-dots-for-visible-light-communication
#16
Shiliang Mei, Xiaoyan Liu, Wanlu Zhang, Ran Liu, Lirong Zheng, Ruiqian Guo, Pengfei Tian
This work proposes a high-bandwidth white-light system consisting of a blue gallium nitride (GaN) micro-LED (μLED) exciting yellow-emitting CsPbBr1.8I1.2 perovskite quantum dots (YQDs) for high-speed real-time visible light communication (VLC). The packaged 80 μm × 80 μm blue-emitting μLED has a modulation bandwidth of ~160 MHz and a peak emission wavelength of ~445 nm. The achievable bandwidth of the white-light system is up to 85 MHz in the absence of filters and equalization technology. Meanwhile, the bandwidth of the YQDs as a color-converter is as high as 73 MHz with the blue GaN μLED as the pump source...
January 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29345710/small-degree-of-anisotropic-wetting-on-self-similar-hierarchical-wrinkled-surfaces
#17
Gaojian Lin, Qiuting Zhang, Cunjing Lv, Yichao Tang, Jie Yin
We studied the wetting behavior of multiscale self-similar hierarchical wrinkled surfaces. The hierarchical surface was fabricated on poly(dimethylsiloxane) (PDMS) substrates by manipulating the sequential strain release and combined plasma/ultraviolet ozone (UVO) treatment. The generated structured surface shows an independently controlled dual-scale roughness with level-1 small-wavelength wrinkles (wavelength of 700-1500 nm and amplitude of 50-500 nm) resting on level-2 large-wavelength wrinkles (wavelength of 15-35 μm and amplitude of 3...
January 18, 2018: Soft Matter
https://www.readbyqxmd.com/read/29345707/synthesis-and-characterization-of-a-photocleavable-collagen-like-peptide
#18
Alfredo Ornelas, Kaitlyn N Williams, Kevin A Hatch, Aurelio Paez, Angela C Aguilar, Cameron C Ellis, Nishat Tasnim, Supriyo Ray, Carl W Dirk, Thomas Boland, Binata Joddar, Chunqiang Li, Katja Michael
A 34-amino acid long collagen-like peptide rich in proline, hydroxyproline, and glycine, and with four photoreactive N-acyl-7-nitroindoline units incorporated into the peptide backbone was synthesized by on-resin fragment condensation. Its circular dichroism supports a stable triple helix structure. The built-in photochemical function enables the decomposition of the peptide into small peptide fragments by illumination with UV light of 350 nm in aqueous solution. Illumination of a thin film of the peptide, or a thin film of a photoreactive amino acid model compound containing a 5-bromo-7-nitroindoline moiety, with femtosecond laser light at 710 nm allows for the creation of well-resolved micropatterns...
January 18, 2018: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29345701/effects-of-particle-size-and-annealing-on-plasmon-induced-charge-separation-at-self-assembled-gold-nanoparticle-arrays
#19
Kun-Che Kao, Hiroyasu Nishi, Tetsu Tatsuma
Two-dimensional periodic Au nanoparticle arrays were constructed on TiO2 thin films by a micelle lithography method and seed-mediated photoelectrochemical growth. Their adjustable interparticle distance allows investigation of a particle size effect on plasmon-induced charge separation (PICS) efficiencies without interference from particle aggregation or plasmon coupling. External or internal PICS efficiencies were found to increase and decrease, respectively, with an increase in particle diameter from 25 to 38 nm...
January 18, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29345627/large-area-synthesis-and-photoelectric-properties-of-few-layered-mose-sub-2-sub-on-molybdenum-foils
#20
Zenghui Wu, Guoan Tai, Xufeng Wang, Tingsong Hu, Rui Wang, Wanlin Guo
Compared with MoS2 and WS2, the selenide analogues have narrower band gaps and higher electron mobilities, which make them more applicable to real electrical devices. Besides, few-layered metal selenides have higher electrical conductivity, carrier mobility and light absorption than the corresponding monolayers. However, the large-scale and high-quality growth of few-layered metal selenides remains a significant challenge. Here, we develop a facile method to grow large-area and highly-crystalline few-layered MoSe2 by directly selenizing the Mo foil surfaces at 550 oC within 60 min under ambient pressure...
January 18, 2018: Nanotechnology
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