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https://www.readbyqxmd.com/read/27923211/study-of-the-thermal-stability-of-studtite-by-in-situ-raman-spectroscopy-and-dft-calculations
#1
Francisco Colmenero, Laura J Bonales, Joaquín Cobos, Vicente Timón
The design of a safe spent nuclear fuel repository requires the knowledge of the stability of the secondary phases which precipitate when water reaches the fuel surface. Studtite is recognized as one of the secondary phases that play a key-role in the mobilization of the radionuclides contained in the spent fuel. Thereby, it has been identified as a product formed under oxidation conditions at the surface of the fuel, and recently found as a corrosion product in the Fukushima-Daiichi nuclear plant accident...
November 29, 2016: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/27916125/high-efficiency-hydrodynamic-chromatography-in-micro-and-sub-micrometer-deep-channels-using-an-on-chip-pressure-generation-unit
#2
Ling Xia, Debashis Dutta
In this article, we report the development of a microchip based hydrodynamic chromatographic device that has an integrated pressure-generation unit to drive the mobile phase during the separation process. The pressure-gradient in this system was realized through introduction of a mismatch in electroosmotic flow rate at the junction of two glass channel segments with different depths as has been previously reported by our research group. A fraction of the resulting pressure-driven flow was then guided into an analysis channel to enable the size-based particle separations...
January 15, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/27910985/uvb-radiation-vitamin-d-and-multiple-sclerosis
#3
H F DeLuca, L Plum
Acheson et al. (1960) observed an inverse relationship between sunlight exposure and the incidence of Multiple Sclerosis (MS). This led to the suggestion that increased levels of vitamin D caused by sunlight in some way suppresses MS. Further, super physiological doses of the metabolically active metabolite of vitamin D, i.e. 1α,25 dihydroxy vitamin D suppresses the animal model of MS i.e. experimental autoimmune encephalomyelitis (EAE). However, this response was accompanied by hypercalcemia. Hypercalcemia itself can suppress EAE...
December 2, 2016: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/27904792/current-concepts-and-treatment-of-patellofemoral-compressive-issues
#4
Michael J Mullaney, Takumi Fukunaga
Patellofemoral disorders, commonly encountered in sports and orthopedic rehabilitation settings, may result from dysfunction in patellofemoral joint compression. Osseous and soft tissue factors, as well as the mechanical interaction of the two, contribute to increased patellofemoral compression and pain. Treatment of patellofemoral compressive issues is based on identification of contributory impairments. Use of reliable tests and measures is essential in detecting impairments in hip flexor, quadriceps, iliotibial band, hamstrings, and gastrocnemius flexibility, as well as in joint mobility, myofascial restrictions, and proximal muscle weakness...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27897298/high-mobility-anisotropic-transport-in-few-layer-%C3%AE-b28-films
#5
Liangzhi Kou, Yandong Ma, Liujiang Zhou, Ziqi Sun, Yuantong Gu, Aijun Du, Sean Smith, Changfeng Chen
Recent reports of successful synthesis of atomically thin boron films have raised great prospects of discovering novel electronic and transport properties in a new type of 2D materials. Here we show by first-principles calculations that monolayer and bilayer γ-B28 films are intrinsically metallic while the thicker films possess intriguing electronic states that exhibit moderate to large bandgaps in all the interior layers but are nearly gapless at the surface. Remarkably, these surface electronic states are tunable by strain, allowing the outermost layer to transition between a semimetal and a narrow-gap semiconductor...
November 29, 2016: Nanoscale
https://www.readbyqxmd.com/read/27897180/quantifying-electronic-band-interactions-in-van-der-waals-materials-using-angle-resolved-reflected-electron-spectroscopy
#6
Johannes Jobst, Alexander J H van der Torren, Eugene E Krasovskii, Jesse Balgley, Cory R Dean, Rudolf M Tromp, Sense Jan van der Molen
High electron mobility is one of graphene's key properties, exploited for applications and fundamental research alike. Highest mobility values are found in heterostructures of graphene and hexagonal boron nitride, which consequently are widely used. However, surprisingly little is known about the interaction between the electronic states of these layered systems. Rather pragmatically, it is assumed that these do not couple significantly. Here we study the unoccupied band structure of graphite, boron nitride and their heterostructures using angle-resolved reflected-electron spectroscopy...
November 29, 2016: Nature Communications
https://www.readbyqxmd.com/read/27892752/concentration-dependence-of-nitroxyl-spin-probes-in-liposomal-solution-electron-spin-resonance-and-overhauser-enhanced-magnetic-resonance-studies
#7
Meenakumari V, Hideo Utsumi, A Jawahar, A Milton Franklin Benial
In this work, the detailed studies of electron spin resonance (ESR) and Overhauser enhanced magnetic resonance imaging (OMRI) were carried out for permeable nitroxyl spin probe, MC-PROXYL as a function of agent concentration in liposomal solution. In order to compare the impermeable nature of nitroxyl radical, the study was also carried out only at 2mM concentration of carboxy-PROXYL. The ESR parameters were estimated using L- band and 300 MHz ESR spectrometers. The line width broadening was measured as a function of agent concentration in liposomal solution...
November 28, 2016: Journal of Liposome Research
https://www.readbyqxmd.com/read/27885622/the-role-of-air-adsorption-in-inverted-ultrathin-black-phosphorus-field-effect-transistors
#8
Qianqian Li, Jiancui Chen, Zhihong Feng, Liefeng Feng, Dongsheng Yao, Shupeng Wang
Few-layer black phosphorus (BP) attracts much attention owing to its high mobility and thickness-tunable band gap; however, compared with the commonly studied transition metal dichalcogenides (TMDCs), BP has the unfavorable property of degrading in ambient conditions. Here, we propose an inverted dual gates structure of ultrathin BP FET to research the air adsorption on BP. In fabrication process of back-gate BP FET, BP was transferred directly onto a wafer covered with electrodes. Thus, we can exclude the BP degradation during the process of electrodes fabrication, such as electron beam lithography (EBL) and thermal evaporation process...
December 2016: Nanoscale Research Letters
https://www.readbyqxmd.com/read/27870843/high-electron-mobility-quantum-hall-effect-and-anomalous-optical-response-in-atomically-thin-inse
#9
Denis A Bandurin, Anastasia V Tyurnina, Geliang L Yu, Artem Mishchenko, Viktor Zólyomi, Sergey V Morozov, Roshan Krishna Kumar, Roman V Gorbachev, Zakhar R Kudrynskyi, Sergio Pezzini, Zakhar D Kovalyuk, Uli Zeitler, Konstantin S Novoselov, Amalia Patanè, Laurence Eaves, Irina V Grigorieva, Vladimir I Fal'ko, Andre K Geim, Yang Cao
A decade of intense research on two-dimensional (2D) atomic crystals has revealed that their properties can differ greatly from those of the parent compound. These differences are governed by changes in the band structure due to quantum confinement and are most profound if the underlying lattice symmetry changes. Here we report a high-quality 2D electron gas in few-layer InSe encapsulated in hexagonal boron nitride under an inert atmosphere. Carrier mobilities are found to exceed 10(3) cm(2) V(-1) s(-1) and 10(4) cm(2) V(-1) s(-1) at room and liquid-helium temperatures, respectively, allowing the observation of the fully developed quantum Hall effect...
November 21, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27864818/effects-of-thickness-of-a-low-temperature-buffer-and-impurity-incorporation-on-the-characteristics-of-nitrogen-polar-gan
#10
Fann-Wei Yang, Yu-Yu Chen, Shih-Wei Feng, Qian Sun, Jung Han
In this study, effects of the thickness of a low temperature (LT) buffer and impurity incorporation on the characteristics of Nitrogen (N)-polar GaN are investigated. By using either a nitridation or thermal annealing step before the deposition of a LT buffer, three N-polar GaN samples with different thicknesses of LT buffer and different impurity incorporations are prepared. It is found that the sample with the thinnest LT buffer and a nitridation step proves to be the best in terms of a fewer impurity incorporations, strong PL intensity, fast mobility, small biaxial strain, and smooth surface...
December 2016: Nanoscale Research Letters
https://www.readbyqxmd.com/read/27836226/temperature-assisted-solute-focusing-with-sequential-trap-release-zones-in-isocratic-and-gradient-capillary-liquid-chromatography-simulation-and-experiment
#11
Stephen R Groskreutz, Stephen G Weber
In this work we characterize the development of a method to enhance temperature-assisted on-column solute focusing (TASF) called two-stage TASF. A new instrument was built to implement two-stage TASF consisting of a linear array of three independent, electronically controlled Peltier devices (thermoelectric coolers, TECs). Samples are loaded onto the chromatographic column with the first two TECs, TEC A and TEC B, cold. In the two-stage TASF approach TECs A and B are cooled during injection. TEC A is heated following sample loading...
November 25, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27833016/the-small-molecule-2-phenylethynesulfonamide-induces-covalent-modification-of-p53
#12
Sarwat Jamil, Payman Hojabrpour, Vincent Duronio
p53 is a tumor suppressor protein which is either lost or inactivated in a large majority of tumors. The small molecule 2-phenylethynesulfonamide (PES) was originally identified as the inhibitor of p53 effects on the mitochondrial death pathway. In this report we demonstrate that p53 protein from PES-treated cells was detected in reduced mobility bands between molecular weights 95-220 kDa. Resolution of p53 aggregates on urea gel was unable to reduce the high molecular weight p53 aggregates, which were shown to be primarily located in the nucleus...
November 7, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27828313/cost-effective-wavelength-reused-mdm-system-for-bidirectional-mobile-fronthaul
#13
Yuanxiang Chen, Juhao Li, Paikun Zhu, Huanfa Peng, Jinglong Zhu, Yu Tian, Zhongying Wu, Dawei Ge, Peng Zhou, Ke Liu, Yongchi Xu, Jingbiao Chen, Yongqi He, Zhangyuan Chen
In this paper, we propose a cost-effective wavelength-reused mode-division-multiplexing (MDM) system for high speed symmetrical bidirectional mobile fronthaul application. At the base band unit (BBU) pool, one of the spatial modes is used to transmit signal carrier while the others are used for downstream (DS) signal channels. At the remote radio unit (RRU) side, the signal carrier is split and reused as modulation carrier for all the upstream (US) signal channels after mode demultiplexing. Thanks to the low mode crosstalk characteristic of the mode multiplexer/demultiplexer (MUX/DEMUX) and few-mode fiber (FMF), the signal carrier and each signal channel can be effectively separated...
October 3, 2016: Optics Express
https://www.readbyqxmd.com/read/27826978/in-vitro-expression-of-hpv16-e7-linked-to-hmgb1-immunoadjuvant-in-mammalian-cells
#14
S Talebi, A Bolhassani, T Mokhtari Azad, A Arashkia, M H Modaresi
BACKGROUND: E7 is the major transforming protein of human papillomavirus (HPV) that plays important role in maintaining the proliferative state in HPV-infected cells. Furthermore, high mobility group 1 protein (HMGB1) is a highly conserved component of chromatin that can be secreted by macrophages and activated monocytes and thus functions as an inflammation mediator. METHODS: In the current study, cloning of HMGB1 gene and also HPV16E7-HMGB1 was performed in pEGFP-N1 eukaryotic expression vector in order to evaluate their expression in mammalian cells...
2016: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/27819461/activity-patterns-in-response-to-symptoms-in-patients-being-treated-for-chronic-fatigue-syndrome-an-experience-sampling-methodology-study
#15
Rebecca Band, Christine Barrowclough, Kim Caldwell, Richard Emsley, Alison Wearden
Objective: Cognitive-behavioral models of chronic fatigue syndrome (CFS) propose that patients respond to symptoms with 2 predominant activity patterns-activity limitation and all-or-nothing behaviors-both of which may contribute to illness persistence. The current study investigated whether activity patterns occurred at the same time as, or followed on from, patient symptom experience and affect. Method: Twenty-three adults with CFS were recruited from U.K. CFS services. Experience sampling methodology (ESM) was used to assess fluctuations in patient symptom experience, affect, and activity management patterns over 10 assessments per day for a total of 6 days...
November 7, 2016: Health Psychology: Official Journal of the Division of Health Psychology, American Psychological Association
https://www.readbyqxmd.com/read/27814306/treadmill-training-with-thera-band-improves-motor-function-gait-and-balance-in-stroke-patients
#16
Taesung In, Youngmi Jin, Kyoungsim Jung, Hwiyoung Cho
OBJECTIVES: The purpose of this study was to evaluate the effects of treadmill training with Thera-Band on motor function, gait and balance abilities in patients with stroke. METHODS: 30 participants with hemiparetic stroke were recruited and randomly divided into two groups: the experimental group (n = 15) and the control group (n = 15). Participants in both groups received conventional physical therapy for 30 minutes before the intervention. Additionally, subject in the experimental group performed treadmill training with Thera-Band for 30 minutes, five times a week for four weeks, while the control group conducted treadmill training only for the same amount of time...
October 31, 2016: NeuroRehabilitation
https://www.readbyqxmd.com/read/27805622/mapping-of-radio-frequency-electromagnetic-field-exposure-levels-in-outdoor-environment-and-comparing-with-reference-levels-for-general-public-health
#17
Mustafa Cansiz, Teymuraz Abbasov, M Bahattin Kurt, A Recai Celik
In this study, radio frequency electromagnetic field exposure levels were measured on the main streets in the city center of Diyarbakır, Turkey. Measured electric field levels were plotted on satellite imagery of Diyarbakır and were compared with exposure guidelines published by the International Commission on Non-Ionizing Radiation Protection (ICNIRP). Exposure measurements were performed in dense urban, urban and suburban areas each day for 7 consecutive days. The measurement system consisted of high precision and portable spectrum analyzer, three-axis electric field antenna, connection cable and a laptop which was used to record the measurement samples as a data logger...
November 2, 2016: Journal of Exposure Science & Environmental Epidemiology
https://www.readbyqxmd.com/read/27797470/the-carrier-transport-improvement-of-ch3nh3pbi3-film-by-methylamine-gas-treatment
#18
Mingjia Zhang, Ning Wang, Shuping Pang, Qing Lv, Changshui Huang, Zhongmin Zhou, Fuxiang Ji
Recently, perovskite solar cells with high photovoltaic performance based on methyl ammonium lead halide have attracted great interest due to the superior physical properties of perovskite optical absorption layer. Here, we investigate the interface carrier transport properties of CH3NH3PbI3 film by applying the reported treatment with methylamine gas, to reveal the possible mechanism of high performance perovskite-sensitized solar cells results. It is found that the crystal structure and surface morphology are effectively improved by the room temperature repair of methylamine atmosphere...
October 31, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27794604/covalent-functionalization-of-black-phosphorus-from-first-principles
#19
Qiang Li, Qionghua Zhou, Xianghong Niu, Yinghe Zhao, Qian Chen, Jinlan Wang
The chemical functionalization is proven to be an effective and controllable approach to modify the properties of black phosphorus (BP), and improve the air-stability of BP and its nanoelectronic applications [Nat. Chem., 2016, 8, 597]. However, covalent functionalization of BP and related properties are poorly understood. Here we present a theoretical investigation on the electronic structure and transport property of chemically modified BP. Our calculations reveal that the molecule modification generates a rather flat energy band within the bandgap, which leads to a reduced hole mobility of BP...
November 1, 2016: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/27789357/drug-distribution-in-nanostructured-lipid-particles
#20
Siavash Saeidpour, Silke B Lohan, Agnieszka Solik, Victoria Paul, Roland Bodmeier, Gaith Zoubari, Robert Bittl, Martina C Meinke, Christian Teutloff
The targeted design of nanoparticles for efficient drug loading and defined release profiles is even after 25 years of research on lipid-based nanoparticles still no routine procedure. It requires detailed knowledge about the interaction of the drug with the lipid compounds and about its localisation and distribution in the nanoparticle. We present here an investigation on nano-sized lipid particles (NLP) composed of Gelucire and Witepsol as solid lipids, and Capryol as liquid lipid, loaded with Dexamethasone, a glucocorticoid used in topical treatment of inflammatory dermal diseases...
October 24, 2016: European Journal of Pharmaceutics and Biopharmaceutics
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