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https://www.readbyqxmd.com/read/28922479/highly-conductive-and-transparent-large-area-bilayer-graphene-realized-by-mocl5-intercalation
#1
Hiroki Kinoshita, Il Jeon, Mina Maruyama, Kenji Kawahara, Yuri Terao, Dong Ding, Rika Matsumoto, Yutaka Matsuo, Susumu Okada, Hiroki Ago
Bilayer graphene (BLG) comprises a 2D nanospace sandwiched by two parallel graphene sheets that can be used to intercalate molecules or ions for attaining novel functionalities. However, intercalation is mostly demonstrated with small, exfoliated graphene flakes. This study demonstrates intercalation of molybdenum chloride (MoCl5 ) into a large-area, uniform BLG sheet, which is grown by chemical vapor deposition (CVD). This study reveals that the degree of MoCl5 intercalation strongly depends on the stacking order of the graphene; twist-stacked graphene shows a much higher degree of intercalation than AB-stacked...
September 18, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28922331/descemet-membrane-thickening-as-a-sign-for-the-diagnosis-of-corneal-graft-rejection-an-ex-vivo-study
#2
Ryan VanDenBerg, Vasilios F Diakonis, Alison Bozung, Gustavo Rosa Gameiro, Oliver Fischer, Ahmed El Dakkak, Jan Paul Ulloa-Padilla, Apostolos Anagnostopoulos, Sander Dubovy, Mohamed Abou Shousha
PURPOSE: To disclose, using an ex vivo study, the histopathological mechanism behind in vivo thickening of the endothelium/Descemet membrane complex (En/DM) observed in rejected corneal grafts (RCGs). METHODS: Descemet membrane (DM), endothelium, and retrocorneal membranes make up the total En/DM thickness. These layers are not differentiable by high-definition optical coherence tomography; therefore, the source of thickening is unclear from an in vivo perspective...
September 14, 2017: Cornea
https://www.readbyqxmd.com/read/28922330/lamina-cribrosa-thickness-in-patients-with-keratoconus
#3
Serkan Akkaya, Bekir Küçük
PURPOSE: To evaluate the thickness and depth of lamina cribrosa (LC) in the optic nerve head region of the eyes in patients with nonglaucomatous keratoconus and to compare the thickness and depth with those of age-matched controls. METHODS: This was a cross-sectional, observational study comprising 45 patients with keratoconus and 56 healthy subjects. Analysis of LC imaging was performed using spectral domain optical coherence tomography. Data collected included spherical equivalent, central corneal thickness, axial length, intraocular pressure, and keratometry...
September 14, 2017: Cornea
https://www.readbyqxmd.com/read/28922117/magnetic-resonance-mediated-radiofrequency-ablation
#4
Yik-Kiong Hue, Alexander R Guimaraes, Ouri Cohen, Erez Nevo, Abraham Roth, Jerome L Ackerman, Jerome L Ackerman
OBJECTIVE: To introduce magnetic resonance mediated radiofrequency ablation (MR-RFA), in which the MRI scanner uniquely serves both diagnostic and therapeutic roles. In MR-RFA scanner-induced RF heating is channeled to the ablation site via a Larmor frequency RF pickup device and needle system, and controlled via the pulse sequence. METHODS: MR-RFA was evaluated with simulation of electric and magnetic fields to predict the increase in local specific-absorption-rate (SAR)...
September 18, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28922031/optic-nerve-head-characteristics-in-chronic-angle-closure-glaucoma-detected-by-swept-source-oct
#5
Dejiao Li, Taibo Li, Eleftherios I Paschalis, Haobing Wang, Elise V Taniguchi, Zi-Ning Choo, Marissa K Shoji, Scott H Greenstein, Stacey C Brauner, Angela V Turalba, Louis R Pasquale, Lucy Q Shen
PURPOSE: To compare structural features in prelaminar and laminar tissues of the optic nerve head (ONH) in chronic angle closure glaucoma (CACG), primary open angle glaucoma (POAG), and control subjects. MATERIALS AND METHODS: ONH imaging was performed using swept-source optical coherence tomography (SS-OCT) for measurements of minimum rim width at Bruch's membrane opening (BMO-MRW), horizontal, and vertical lamina cribrosa depth (LCD). Prelaminar defects, categorized as hole and wedge, and lamina cribrosa (LC) defects were identified...
September 18, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28921961/three-dimensional-reconstruction-of-nuclear-envelope-architecture-using-dual-color-metal-induced-energy-transfer-imaging
#6
Anna M Chizhik, Daja Ruhlandt, Janine Pfaff, Narain Karedla, Alexey I Chizhik, Ingo Gregor, Ralph Heinz Kehlenbach, Joerg Enderlein
The nuclear envelope, comprising the inner and the outer nuclear membrane, separates the nucleus from the cytoplasm and plays a key role in cellular functions. Nuclear pore complexes (NPCs), which are embedded in the nuclear envelope, control transport of macromolecules between the two compartments. Here, using dual-color Metal-Induced Energy Transfer (MIET), we determine the axial distance between Lap2β and Nup358 as markers for the inner nuclear membrane and the cytoplasmic side of the NPC, respectively...
September 18, 2017: ACS Nano
https://www.readbyqxmd.com/read/28921957/silver-nanowires-for-reconfigurable-bloch-surface-waves
#7
Douguo Zhang, Ruxue Wang, Yifeng Xiang, Yan Kuai, Cuifang Kuang, Ramachandram Badugu, Yingke Xu, Pei Wang, Hai Ming, Xu Liu, Joseph R Lakowicz
The use of a single silver nanowire as a flexible coupler to transform a free space beam into a Bloch surface wave propagating on a dielectric multilayer is proposed. Based on Huygens 'Principle, when a Gaussian beam is focused onto a straight silver nanowire, a Bloch surface wave is generated and propagates perpendicular to the nanowire. By curving the silver nanowire, the surface wave can be focused. Furthermore, the spatial phase of the incident laser beam can be actively controlled with the aid of a spatial light modulator, resulting in the reconfigurable or dynamically controlled Bloch surface waves...
September 18, 2017: ACS Nano
https://www.readbyqxmd.com/read/28920963/tuning-a-circular-p-n-junction-in-graphene-from-quantum-confinement-to-optical-guiding
#8
Yuhang Jiang, Jinhai Mao, Dean Moldovan, Massoud Ramezani Masir, Guohong Li, Kenji Watanabe, Takashi Taniguchi, Francois M Peeters, Eva Y Andrei
The photon-like propagation of the Dirac electrons in graphene, together with its record-high electronic mobility, can lead to applications based on ultrafast electronic response and low dissipation. However, the chiral nature of the charge carriers that is responsible for the high mobility also makes it difficult to control their motion and prevents electronic switching. Here, we show how to manipulate the charge carriers by using a circular p-n junction whose size can be continuously tuned from the nanometre to the micrometre scale...
September 18, 2017: Nature Nanotechnology
https://www.readbyqxmd.com/read/28920886/retinal-layer-segmentation-in-multiple-sclerosis-a-systematic-review-and-meta-analysis
#9
Axel Petzold, Laura J Balcer, Peter A Calabresi, Fiona Costello, Teresa C Frohman, Elliot M Frohman, Elena H Martinez-Lapiscina, Ari J Green, Randy Kardon, Olivier Outteryck, Friedemann Paul, Sven Schippling, Patrik Vermersch, Pablo Villoslada, Lisanne J Balk
BACKGROUND: Structural retinal imaging biomarkers are important for early recognition and monitoring of inflammation and neurodegeneration in multiple sclerosis. With the introduction of spectral domain optical coherence tomography (SD-OCT), supervised automated segmentation of individual retinal layers is possible. We aimed to investigate which retinal layers show atrophy associated with neurodegeneration in multiple sclerosis when measured with SD-OCT. METHODS: In this systematic review and meta-analysis, we searched for studies in which SD-OCT was used to look at the retina in people with multiple sclerosis with or without optic neuritis in PubMed, Web of Science, and Google Scholar between Nov 22, 1991, and April 19, 2016...
October 2017: Lancet Neurology
https://www.readbyqxmd.com/read/28920404/effects-of-zearalenone-on-the-localization-and-expression-of-the-growth-hormone-receptor-gene-in-the-uteri-of-post-weaning-piglets
#10
Min Zhou, LiJie Yang, Weiren Yang, Libo Huang, Xuemei Zhou, Shuzhen Jiang, Zaibin Yang
Objective: In this study, we investigated the adverse effects of dietary zearalenone (ZEA) (0.5 to 1.5 mg•kg-1 diet) on the localization and expression of the growth hormone receptor (GHR) in the uteri of post-weaning gilts and explored another mechanism of the reproductive toxicity of ZEA on piglets. Methods: A total of forty healthy piglets (Duroc × Landrace × Large White) aged 28 d were selected for study. Piglets were transferred to single cages after 10 days' adaptation on an obstetric table...
September 18, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28920127/incident-angle-controlled-semitransparent-colored-perovskite-solar-cells-with-improved-efficiency-exploiting-a-multilayer-dielectric-mirror
#11
Kyu-Tae Lee, Ji-Yun Jang, Sang Jin Park, Song Ah Ok, Hui Joon Park
See-through perovskite solar cells with high efficiency and iridescent colors are demonstrated by employing a multilayer dielectric mirror. A certain amount of visible light is used for wide color gamut semitransparent color generation, which can be easily tuned by changing an angle of incidence, and a wide range of visible light is efficiently reflected back toward a photoactive layer of the perovskite solar cells by the dielectric mirror for highly efficient light-harvesting performance, thus achieving 10...
September 18, 2017: Nanoscale
https://www.readbyqxmd.com/read/28919452/the-affinity-of-transthyretin-for-t3-or-t4-does-not-determine-which-form-of-the-hormone-accumulates-in-the-choroid-plexus
#12
Samantha J Richardson, Stijn Van Herck, Joke Delbaere, Bronwyn M McAllan, Veerle M Darras
Normal development of the brain is dependent on the required amounts of thyroid hormones (THs) reaching specific regions of the brain during each stage of ontogeny. Many proteins are involved with regulation of TH bioavailability in the brain: the TH distributor protein transthyretin (TTR), TH transmembrane transporters (e.g. MCT8, MCT10, LAT1, OATP1C1) and deiodinases (D1, D2 and D3) which either activate or inactivate THs. Previous studies revealed that in mammals, T4, but not T3, accumulated in the choroid plexus and then entered the cerebrospinal fluid...
September 14, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28918374/a-general-strategy-to-fabricate-photonic-crystal-heterostructure-with-programmed-photonic-stopband
#13
Lijing Zhang, Bofan Liu, Jie Wang, Shengyang Tao, Qingfeng Yan
In this paper, we present a general fabrication strategy to achieve the structure control and the flexible photonic stop band regulation of (2+1) D photonic crystal heterostructures (PCHs) by layer-by-layer depositing the annealed colloidal crystal monolayers of different sphere size. The optical properties of the resulting (2+1) DPCHs with different lattice constants were systematically studied and a universal photonic stopband variation rule was proposed, which makes it possible to program any kind of stopband structure as required, such as dual- or multi-stopbands PCH and ultra-wide stopband PCH...
August 24, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28917887/a-visible-and-controllable-porphyrin-poly-ethylene-glycol-%C3%AE-cyclodextrin-hydrogel-nanocomposites-system-for-photo-response
#14
Jie Liang, Xia Dong, Chang Wei, Guilei Ma, Tianjun Liu, Deling Kong, Feng Lv
The real-time controlling and tracking of the evolution and status of the hydrogel are important challenges for accurate and precise assessments. In this article, a visible and controllable hydrogel nanocomposites system for photo response was designed and developed based on a thermosensitive porphyrin-poly(ethylene glycol)/α-cyclodextrin hydrogel loaded with multi-walled carbon nanotubes (PPEG-MWNTs/α-CD). The PPEG-MWNTs/α-CD hydrogel was simply self-assembled with a carbon nanotubes dispersed porphyrin-poly(ethylene glycol) solution and an aqueous solution of α-cyclodextrin by homogeneous stirring...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917802/on-chip-microfluidic-generation-of-monodisperse-bubbles-for-liquid-interfacial-tension-measurement
#15
Chen Wang, Jing Cao, Yue Zhou, Xing-Hua Xia
A novel microfluidic method for measuring liquid interfacial tension using monodisperse microbubbles generated in situ has been proposed. Instead of bulky gas supply used in traditional microfluidic devices, microbubbles are efficiently generated via water electrolysis in the devices. Since the bubble formation frequency is related to the interfacial tension of liquids used, thus, precisely measuring the interfacial tension of liquids in microfluidics can be achieved. In addition, it is found that during the microbubble formation, the electrochemical potential fluctuates regularly at controlled electrolysis current, and the fluctuating period depends on the microbubble generation rate...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28917689/effect-of-early-pitavastatin-therapy-on-coronary-fibrous-cap-thickness-assessed-by-optical-coherence-tomography-in-patients-with-acute-coronary-syndrome-the-escort-study
#16
Tsuyoshi Nishiguchi, Takashi Kubo, Takashi Tanimoto, Yasushi Ino, Yoshiki Matsuo, Takashi Yamano, Kosei Terada, Hiroki Emori, Yosuke Katayama, Akira Taruya, Yuichi Ozaki, Yasutsugu Shiono, Kunihiro Shimamura, Takeyoshi Kameyama, Hironori Kitabata, Tomoyuki Yamaguchi, Atsushi Tanaka, Takeshi Hozumi, Takashi Akasaka
OBJECTIVES: The aim of the present study was to assess the effect of early statin therapy on fibrous-cap thickness in coronary plaques of patients with acute coronary syndrome (ACS) by using optical coherence tomography. BACKGROUND: Statins can contribute to the stabilization of coronary plaques. METHODS: This is a prospective, randomized, active-controlled, single-center study. Patients with ACS and untreated dyslipidemia were enrolled and randomly allocated (ratio 1:1) to either the early statin group (received pitavastatin 4 mg/day from baseline) or the late statin group (received pitavastatin 4 mg/day from 3 weeks after the baseline)...
September 9, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28917091/recovery-from-diabetes-insipidus-and-preservation-of-thyroid-function-after-craniopharyngioma-removal-and-pituitary-stalk-sectioning
#17
Yoshikazu Ogawa, Kuniyasu Niizuma, Teiji Tominaga
OBJECTIVES: Craniopharyngioma is a slow-growing tumor, but long-term tumor control with maintenance of quality of life is sometimes very difficult to achieve, and hypothalamic disturbance should be strictly avoided in the treatment. However, management of the pituitary gland and/or pituitary stalk varies among surgeons and institutions. PATIENTS AND METHODS: This retrospective review identified 44 patients, 24 males and 20 females with craniopharyngiomas who were initially treated by surgery through the extended transsphenoidal approach with pituitary stalk sectioning at a single institute...
September 9, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28916751/understanding-cry2-interactions-for-optical-control-of-intracellular-signaling
#18
Liting Duan, Jen Hope, Qunxiang Ong, Hsin-Ya Lou, Namdoo Kim, Comfrey McCarthy, Victor Acero, Michael Z Lin, Bianxiao Cui
Arabidopsis cryptochrome 2 (CRY2) can simultaneously undergo light-dependent CRY2-CRY2 homo-oligomerization and CRY2-CIB1 hetero-dimerization, both of which have been widely used to optically control intracellular processes. Applications using CRY2-CIB1 interaction desire minimal CRY2 homo-oligomerization to avoid unintended complications, while those utilizing CRY2-CRY2 interaction prefer robust homo-oligomerization. However, selecting the type of CRY2 interaction has not been possible as the molecular mechanisms underlying CRY2 interactions are unknown...
September 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28916480/factors-associated-with-zonular-instability-during-cataract-surgery-in-eyes-with-acute-angle-closure-attack
#19
Junki Kwon, Kyung Rim Sung
PURPOSE: To compare the demographics and ocular characteristics, including anterior segment optical coherence tomography images and zonular instability in eyes with a history of acute angle closure (AAC) attack and subsequent cataract surgery. DESIGN: Retrospective, case-control study METHODS: Total 68 eyes of 56 patients with a history of AAC attack who underwent cataract surgery were enrolled. Fourteen eyes were assigned to the zonular instability (+) group and 54 were assigned to the zonular instability (-) group based on the presence of zonular instability during cataract surgery...
September 12, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28916111/icosahedral-plant-viral-nanoparticles-bioinspired-synthesis-of-nanomaterials-nanostructures
#20
REVIEW
Kannan Badri Narayanan, Sung Soo Han
Viral nanotechnology utilizes virus nanoparticles (VNPs) and virus-like nanoparticles (VLPs) of plant viruses as highly versatile platforms for materials synthesis and molecular entrapment that can be used in the nanotechnological fields, such as in next-generation nanoelectronics, nanocatalysis, biosensing and optics, and biomedical applications, such as for targeting, therapeutic delivery, and non-invasive in vivo imaging with high specificity and selectivity. In particular, plant virus capsids provide biotemplates for the production of novel nanostructured materials with organic/inorganic moieties incorporated in a very precise and controlled manner...
August 31, 2017: Advances in Colloid and Interface Science
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