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https://www.readbyqxmd.com/read/28326231/in-situ-monitoring-by-raman-spectroscopy-of-the-thermal-doping-of-graphene-and-mos2-in-o2-controlled-atmosphere
#1
Aurora Piazza, Filippo Giannazzo, Gianpiero Buscarino, Gabriele Fisichella, Antonino La Magna, Fabrizio Roccaforte, Marco Cannas, Franco Mario Gelardi, Simonpietro Agnello
The effects of temperature and atmosphere (air and O2) on the doping of monolayers of graphene (Gr) on SiO2 and Si substrates, and on the doping of MoS2 multilayer flakes transferred on the same substrates have been investigated. The investigations were carried out by in situ micro-Raman spectroscopy during thermal treatments up to 430 °C, and by atomic force microscopy (AFM). The spectral positions of the G and 2D Raman bands of Gr undergo only minor changes during treatment, while their amplitude and full width at half maximum (FWHM) vary as a function of the temperature and the used atmosphere...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28290213/cardamom-fruits-as-a-green-resource-for-facile-synthesis-of-gold-and-silver-nanoparticles-and-their-biological-applications
#2
Veronika Soshnikova, Yeon Ju Kim, Priyanka Singh, Yue Huo, Josua Markus, Sungeun Ahn, Verónica Castro-Aceituno, Jongpyo Kang, Mohan Chokkalingam, Ramya Mathiyalagan, Deok Chun Yang
Gold (FA-AuNps) and silver (FA-AgNps) nanoparticles were synthesized at room temperature by aqueous extract of dried fruits of Amomum villosum, also known as Fructus Amomi (cardamom), in order to confer antioxidant, catalytic, antimicrobial activities and treatment effect against breast cancer cells. Fruit extracts served as both reducing agents and stabilizers in lieu of chemical agents. Ultra-violet visible (UV-Vis) spectroscopy, field emission transmission electron microscopy (FE-TEM), energy-dispersive X-ray (EDX) spectroscopy, elemental mapping, X-ray powder diffraction (XRD), selected area electron diffraction (SAED), dynamic light scattering (DLS) and Fourier transform infrared (FTIR) spectroscopy were employed to characterize the biosynthesized nanoparticles...
March 14, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28260217/anatomical-basis-of-the-extended-tdap-flap-study-of-its-territories-of-vascularization-and-its-volume
#3
Dast Sandy, Havet Eric, Dessena Lidia, Abdulshakoor Abeer, Alharbi Mohammed, Vaucher Richard, Herlin Christian, Sinna Raphael
INTRODUCTION: The concept of extended thoracodorsal artery perforator (TDAP) flap was described in 2015 for breast reconstruction. Our anatomical study aims to identify the territories vascularised by the thoracodorsal artery perforator via the deep muscular fascial network. The second goal was to define the volume of the extended TDAP flap. MATERIALS AND METHOD: Ten extended TDAP flaps were dissected on 5 fresh human cadavers. Around the classical skin paddle of a TDAP flap, the dissections were performed in a subfascial level, including the muscular fascia and the adipose tissue compartments to increase the volume of the flap...
March 4, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28243795/minodronic-acid-induces-morphological-changes-in-osteoclasts-at-bone-resorption-sites-and-reaches-a-level-required-for-antagonism-of-purinergic-p2x2-3-receptors
#4
Makoto Tanaka, Akihiro Hosoya, Hiroshi Mori, Ryoji Kayasuga, Hiroaki Nakamura, Hidehiro Ozawa
Minodronic acid is an aminobisphosphonate that is an antagonist of purinergic P2X2/3 receptors involved in pain. The aim of this study was to investigate the action and distribution of minodronic acid and the potential for P2X2/3 receptor antagonism based on the estimated concentration of minodronic acid. Microlocalization of radiolabeled minodronic acid was examined in the femur of neonatal rats. The bone-binding characteristics of minodronic acid and morphological changes in osteoclasts were analyzed in vitro...
February 27, 2017: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/28231429/two-dimensional-excitonic-photoluminescence-in-graphene-on-a-cu-surface
#5
Youngsin Park, Yooseok Kim, Chang Woo Myung, Robert Anthony Taylor, Christopher C S Chan, Benjamin P L Reid, Tim J Puchtler, Robin J Nicholas, Laishram Tomba Singh, Geunsik Lee, Chan-Cuk Hwang, Chong-Yun Park, Kwang S Kim
Despite having outstanding electrical properties, graphene is unsuitable for optical devices because of its zero band gap. Here, we report two-dimensional excitonic photoluminescence (PL) from graphene grown on a Cu(111) surface, which shows an unexpected and remarkably sharp strong emission near 3.16 eV (full-width at half-maximum ≤ 3meV) and multiple emissions around 3.18 eV. As temperature increases, these emissions blue-shift, displaying the characteristic negative thermal coefficient of graphene. The observed PL originates from the significantly suppressed dispersion of excited electrons in graphene caused by hybridization of graphene π and Cu d orbitals of the 1st and 2nd Cu layers at a shifted saddle point 0...
February 23, 2017: ACS Nano
https://www.readbyqxmd.com/read/28213875/vehicle-type-affects-filling-of-fractional-laser-ablated-channels-imaged-by-optical-coherence-tomography
#6
Uffe Høgh Olesen, Mette Mogensen, Merete Haedersdal
Ablative fractional laser (AFXL) is an emerging method that enhances topical drug delivery. Penetrating the skin in microscopic, vertical channels, termed microscopic treatment zones (MTZs), the fractional technique circumvents the skin barrier and allows increased uptake of topically applied drugs. This study aims to elucidate the impact of vehicle type on the filling of MTZs from application of liquid, gel, and cream vehicles. Ex vivo pig skin was exposed to 10,600 nm fractional CO2 laser at 5% density, 120 μm beam diameter, and fluences of 40 and 80 mJ/microbeam (mJ/mb)...
April 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28187674/a-new-species-of-poison-dart-frog-anura-dendrobatidae-from-manu-province-amazon-region-of-southeastern-peru-with-notes-on-its-natural-history-bioacoustics-phylogenetics-and-recommended-conservation-status
#7
Shirley J Serrano-Rojas, Andrew Whitworth, Jaime Villacampa, Rudolf VON May, Roberto C Gutiérrez, José M Padial, Juan C Chaparro
We describe and name a new species of poison-dart frog from the Amazonian slopes of the Andes in Manu Province, Madre de Dios Department, Peru; specifically within the Amarakaeri Communal Reserve and the buffer zone of Manu National Park. Ameerega shihuemoy sp. nov. is supported by a unique combination of characters: black dorsum with cream to light orange dorsolateral lines, blue belly reticulated with black, and the lack of axillary, thigh and calf flash marks. Within Ameerega, it shares the general appearance of A...
January 16, 2017: Zootaxa
https://www.readbyqxmd.com/read/28166432/quantitative-histochemistry-for-macrophage-biodistribution-on-mice-liver-and-spleen-after-the-administration-of-a-pharmacological-relevant-dose-of-polyacrylic-acid-coated-iron-oxide-nanoparticles
#8
Daniela Rodrigues, Marisa Freitas, Vera Marisa Costa, Manuel Arturo Lopez-Quintela, José Rivas, Paulo Freitas, Félix Carvalho, Eduarda Fernandes, Paula Silva
Understanding in vivo biodistribution of iron oxide nanoparticles (IONs), and the involvement of the phagocyte system in this process, is crucial for the assessment of their potential health risk. In the present study, the histochemical expression of iron in liver and spleen sections of CD-1 mice (aged 8 weeks) was quantified, 24 h after intravenous administration of polyacrylic acid-coated IONs (PAA-coated IONs) (8, 20, 50 mg/kg). Organ sections were stained with Perls' Prussian blue for iron detection, followed by the quantification of iron deposition with ImageJ software...
March 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28147400/internal-limiting-membrane-flap-techniques-for-the-repair-of-large-macular-holes-a-short-term-follow-up-of-anatomical-and-functional-outcomes
#9
J Guber, C Lang, C Valmaggia
Background To evaluate the technique of inverted internal limiting membrane (ILM) flaps for the management of large macular holes and autologous ILM free flaps for non-closing macular holes. Patients and methods All macular holes were treated with pars plana vitrectomy and dual blue assisted ILM flap technique. The inverted ILM flap was created as a primary procedure for large macular holes (diameter > 400 µm). On the other hand, the free ILM flap technique was used as a secondary procedure for non-closing macular holes after failed initial standard procedure...
February 1, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28118884/iningainema-pulvinus-gen-nov-sp-nov-cyanobacteria-scytonemataceae-a-new-nodularin-producer-from-edgbaston-reserve-north-eastern-australia
#10
Glenn B McGregor, Barbara C Sendall
A new nodularin producing benthic cyanobacterium Iningainema pulvinus gen nov., sp nov. was isolated from a freshwater ambient spring wetland in tropical, north-eastern Australia and characterised using combined morphological and phylogenetic attributes. It formed conspicuous irregularly spherical to discoid, blue-green to olive-green cyanobacterial colonies across the substratum of shallow pools. Morphologically Iningainema is most similar to Scytonematopsis Kiseleva and Scytonema Agardh ex Bornet & Flahault...
February 2017: Harmful Algae
https://www.readbyqxmd.com/read/28107969/a-new-paper-based-analytical-device-for-detection-of-glucose-6-phosphate-dehydrogenase-deficiency
#11
Phuritat Kaewarsa, Wanida Laiwattanapaisal, Attakorn Palasuwan, Duangdao Palasuwan
Glucose-6-phosphate dehydrogenase (G6PD) deficiency is a genetic haemolytic disorder. Most persons with G6PD deficiency are asymptomatic, but exposure to oxidant drugs, such as the anti-malarial drug primaquine, may induce haemolysis, which is commonly found in Asian countries. A reliable test is necessary for diagnosing the deficiency to prevent an acute haemolytic crisis. This study proposes a novel quantitative method to detect G6PD deficiency using paper-based analytical devices (G6PDD-PAD). Wax printing was utilized for fabricating circular reaction zone patterns in paper...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28087734/increased-mitophagy-in-the-skeletal-muscle-of-spinal-and-bulbar-muscular-atrophy-patients
#12
Doriana Borgia, Adriana Malena, Marco Spinazzi, Maria Andrea Desbats, Leonardo Salviati, Aaron P Russell, Giovanni Miotto, Laura Tosatto, Elena Pegoraro, Gianni Sorarù, Maria Pennuto, Lodovica Vergani
Spinal and bulbar muscular atrophy (SBMA) is a neuromuscular disorder caused by polyglutamine expansion in the androgen receptor (AR) and characterized by the loss of lower motor neurons. Here we investigated pathological processes occurring in muscle biopsy specimens derived from SBMA patients and, as controls, age-matched healthy subjects and patients suffering from amyotrophic lateral sclerosis (ALS) and neurogenic atrophy. We detected atrophic fibers in the muscle of SBMA, ALS and neurogenic atrophy patients...
January 13, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28060072/zone-i-of-tear-microdesiccates-is-a-lipid-containing-structure
#13
Felipe Traipe, Leonidas Traipe, Daniela Salinas-Toro, Daniela López, Felipe Valenzuela, Claudio Pérez, Cristian Cartes, Francisca Zuazo, Patricia Varela, Héctor Toledo-Araya, Remigio López-Solís
PURPOSE: Morphological features of tear microdesiccates on glass surfaces have been associated with tear fluid status. Tear-film lipids play a critical role in the pathophysiology of some ocular surface disorders. Tear microdesiccates display 4 distinctive morphological domains (zones I, II, III, and transition band). In this study, we investigated the lipid location in tear microdesiccates. METHODS: Tear from individual healthy eyes (assessed by symptoms, signs, and slit-lamp examination) was collected using absorbing minisponges...
February 2017: Cornea
https://www.readbyqxmd.com/read/28035234/genetic-diversity-and-connectivity-within-mytilus-spp-in-the-subarctic-and-arctic
#14
Sofie Smedegaard Mathiesen, Jakob Thyrring, Jakob Hemmer-Hansen, Jørgen Berge, Alexey Sukhotin, Peter Leopold, Michaël Bekaert, Mikael Kristian Sejr, Einar Eg Nielsen
Climate changes in the Arctic are predicted to alter distributions of marine species. However, such changes are difficult to quantify because information on present species distribution and the genetic variation within species is lacking or poorly examined. Blue mussels, Mytilus spp., are ecosystem engineers in the coastal zone globally. To improve knowledge of distribution and genetic structure of the Mytilus edulis complex in the Arctic, we analyzed 81 SNPs in 534 Mytilus spp. individuals sampled at 13 sites to provide baseline data for distribution and genetic variation of Mytilus mussels in the European Arctic...
January 2017: Evolutionary Applications
https://www.readbyqxmd.com/read/28031697/clinical-and-histological-evaluation-of-large-macular-hole-surgery-using-the-inverted-internal-limiting-membrane-flap-technique
#15
Satoru Kase, Wataru Saito, Shohei Mori, Michiyuki Saito, Ryo Ando, Zhenyu Dong, Tomohiro Suzuki, Kousuke Noda, Susumu Ishida
PURPOSE: The aims of this study were to analyze optical coherence tomography (OCT) imaging of large macular holes (MHs) treated with inverted internal limiting membrane (ILM) flap technique and to perform a histological examination of an ILM-like membrane tissue obtained during vitrectomy. PATIENTS AND METHODS: This is a retrospective observational case study. Nine patients, comprising of five males and four females, showing large and myopic MHs, underwent pars plana vitrectomy (PPV) with inverted ILM flap technique assisted by brilliant blue G (BBG) staining...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28024197/building-blue-an-eco-engineering-framework-for-foreshore-developments
#16
M Mayer-Pinto, E L Johnston, A B Bugnot, T M Glasby, L Airoldi, A Mitchell, K A Dafforn
Urbanisation in terrestrial systems has driven architects, planners, ecologists and engineers to collaborate on the design and creation of more sustainable structures. Examples include the development of 'green infrastructure' and the introduction of wildlife corridors that mitigate urban stressors and provide positive ecological outcomes. In contrast, efforts to minimise the impacts of urban developments in marine environments have been far more restricted in their extent and scope, and have often overlooked the ecological role of the built environment as potential habitat...
March 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28005720/fundus-autofluorescence-in-rubella-retinopathy-correlation-with-photoreceptor-structure-and-function
#17
Danuta M Bukowska, Sue Ling Wan, Avenell L Chew, Enid Chelva, Ivy Tang, David A Mackey, Fred K Chen
PURPOSE: To illustrate altered fundus autofluorescence in rubella retinopathy and to investigate their relationships with photoreceptor structure and function using multimodal imaging. METHODS: The authors report four cases of rubella retinopathy aged 8, 33, 42, and 50 years. All patients had dilated clinical fundus examination; wide-field color photography; blue, green, and near-infrared autofluorescence imaging and spectral domain optical coherence tomography...
January 2017: Retina
https://www.readbyqxmd.com/read/27997397/phenanthrene-removal-from-liquid-medium-with-emphasis-on-production-of-biosurfactant
#18
Masoumeh Golshan, Roshanak Rezaei Kalantary, Simin Nasseri, Mahdi Farzadkia, Ali Esrafili, Farzaneh Gharibzadeh, Leila Karimi Takanlu, Vida Alvani
In the current study, there are some considerable issues which focused on: (1) the production of biosurfactant, (2) its correlation with the initial bacterial inoculum in the liquid phase and (3) its effect on polycyclic hydrocarbon (PAH) bioremediation performance. Therefore, two strains Pseudomonas facilis and Pseudomonas spp. were able to form a large clear zone diameter on the oil surface. Phenanthrene (PHE) was also utilized as a sole substrate. Furthermore, biosurfactant production (BP) was detected by methylene blue analysis procedure and surface tension (ST) lowering...
December 2016: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/27987459/hollow-cross-linked-enzyme-aggregates-h-clea-of-laccase-with-high-uniformity-and-activity
#19
Le Truc Nguyen, Nianjia Seow, Kun-Lin Yang
Hollow cross-linked enzyme aggregates of laccase (h-CLEA laccase) can be prepared by employing a millifluidic reactor carrying two coaxial laminar flows. In a confluence zone where acetonitrile and an aqueous solution of laccase meet, diffusion of acetonitrile into the aqueous solution gives rise to rapid precipitation of laccase aggregates at the water/acetonitrile interface, as is evidenced by fluorescence images. By controlling the flow rates carefully in the laminar flow regions, h-CLEA laccase around 220±10nm can be obtained, and the size of the h-CLEA laccase increases with increasing flow rates of both solutions...
December 8, 2016: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/27923152/hydronephrosis-in-the-wnt5a-ablated-kidney-is-caused-by-an-abnormal-ureter-bladder-connection
#20
Kangsun Yun, Alan O Perantoni
The Wnt5a null mouse is a complex developmental model which, among its several posterior-localized axis defects, exhibits multiple kidney phenotypes, including duplex kidney and loss of the medullary zone. We previously reported that ablation of Wnt5a in nascent mesoderm causes duplex kidney formation as a result of aberrant development of the nephric duct and abnormal extension of intermediate mesoderm. However, these mice also display a loss of the medullary region late in gestation. We have now genetically isolated duplex kidney formation from the medullary defect by specifically targeting the progenitors for both the ureteric bud and metanephric mesenchyme...
March 2017: Differentiation; Research in Biological Diversity
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