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https://www.readbyqxmd.com/read/28820237/a-conformal-silk-azobenzene-composite-for-optically-switchable-diffractive-structures
#1
Giovanna Palermo, Luca Barberi, Giovanni Perotto, Roberto Caputo, Luciano De Sio, Cesare Umeton, Fiorenzo G Omenetto
The use of biomaterials as optical components has recently attracted attention because of their ease of functionalization and fabrication, along with their potential use when integrated with biological materials. We present here an observation of the optical properties of a silk-azobenzene material (Azosilk) and demonstrate the operation of an Azosilk/PDMS composite structure that serves as a conformable and switchable optical diffractive structure. Characterization of thermal and isomeric properties of the device, along with its overall performance, is presented in terms of diffractive characteristics and response times...
August 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28814824/cataract-surgery-in-patients-with-pseudoex-foliation-syndrome-current-updates
#2
REVIEW
Luigi Fontana, Marco Coassin, Alfonso Iovieno, Antonio Moramarco, Luca Cimino
Pseudoexfoliation is a ubiquitous syndrome of multifactorial origin affecting elderly people by increasing the risk of cataract and secondary glaucoma development. Despite modern techniques and technologies for cataract surgery, pseudoexfoliation syndrome represents a challenge for surgeons because of the increased weakness of the zonular apparatus and limited pupil dilation. Due to the inherent difficulties during surgery, the risk of vitreous loss in these patients is several times higher than in cataract patients without pseudoexfoliation...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28814528/physician-training-protocol-within-the-web-intrasaccular-therapy-web-it-study
#3
Adam Arthur, Daniel Hoit, Alexander Coon, Josser E Delgado Almandoz, Lucas Elijovich, Saruhan Cekirge, David Fiorella
INTRODUCTION: The WEB Intra-saccular Therapy (WEB-IT) trial is an investigational device exemption study to demonstrate the safety and effectiveness of the WEB device for the treatment of wide-neck bifurcation aneurysms. The neurovascular replicator (Vascular Simulations, Stony Brook, New York, USA) creates a physical environment that replicates patient-specific neurovascular anatomy and hemodynamic physiology, and allows devices to be implanted under fluoroscopic guidance. OBJECTIVE: To report the results of a unique neurovascular replicator-based training program, which was incorporated into the WEB-IT study to optimize technical performance and patient safety...
August 16, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28813968/changes-in-neuromuscular-activity-during-motor-training-with-a-body-machine-interface-after-spinal-cord-injury
#4
C Pierella, A De Luca, E Tasso, F Cervetto, S Gamba, L Losio, E Quinland, A Venegoni, S Mandraccia, I Muller, A Massone, F A Mussa-Ivaldi, M Casadio
Body machine interfaces (BMIs) are used by people with severe motor disabilities to control external devices, but they also offer the opportunity to focus on rehabilitative goals. In this study we introduced in a clinical setting a BMI that was integrated by the therapists in the rehabilitative treatments of 2 spinal cord injured (SCI) subjects for 5 weeks. The BMI mapped the user's residual upper body mobility onto the two coordinates of a cursor on a screen. By controlling the cursor, the user engaged in playing computer games...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28805692/real-time-rain-rate-evaluation-via-satellite-downlink-signal-attenuation-measurement
#5
Filippo Giannetti, Ruggero Reggiannini, Marco Moretti, Elisa Adirosi, Luca Baldini, Luca Facheris, Andrea Antonini, Samantha Melani, Giacomo Bacci, Antonio Petrolino, Attilio Vaccaro
We present the NEFOCAST project (named by the contraction of "Nefele", which is the Italian spelling for the mythological cloud nymph Nephele, and "forecast"), funded by the Tuscany Region, about the feasibility of a system for the detection and monitoring of precipitation fields over the regional territory based on the use of a widespread network of new-generation Eutelsat "SmartLNB" (smart low-noise block converter) domestic terminals. Though primarily intended for interactive satellite services, these devices can also be used as weather sensors, as they have the capability of measuring the rain-induced attenuation incurred by the downlink signal and relaying it on an auxiliary return channel...
August 12, 2017: Sensors
https://www.readbyqxmd.com/read/28805487/state-of-the-art-nanopathological-diagnostics
#6
Luca Roncati, Giuseppe Barbolini
The nanopathological diagnostics (ND) is an ultra-specialized branch of pathological anatomy aimed to identify the nanoparticles of metallic, semimetallic, or nonmetallic elements in the inorganic particulate matter present inside pathological tissues, even on the nanometer scale. ND exploits an environmental scanning electron microscope, connected to an X-ray microprobe mounted on an energy-dispersive spectrometer. The searching of nanoparticles can be performed on paraffin-embedded material, omitting emissions of black overlay and plating procedures...
August 14, 2017: Ultrastructural Pathology
https://www.readbyqxmd.com/read/28805058/energy-level-alignment-of-a-hole-transport-organic-layer-and-ito-towards-applications-for-organic-electronic-devices
#7
Quentin Arnoux, Anthony Boucly, Vincent Barth, Rabah Benbalagh, Albano Cossaro, Luca Floreano, Mathieu G Silly, Fausto Sirotti, Etienne Derat, Stephane Carniato, Fabrice Bournel, Jean-Jacques Gallet, Denis Fichou, Ludovic Tortech, Francois Rochet
2,2',6,6'-tetraphenyl-4,4'-dipyranylidene (DIPO-Ph4) was grown by vacuum-deposition on an indium tin oxide (ITO) substrate. The films were characterized by atomic force microscopy and synchrotron radiation UV and X-ray photoelectron spectroscopy to gain an insight into the material growth and to better understand the electronic properties of the DIPO-Ph4/ITO interface. Results show formation of cationic DIPO-Ph4 at ITO interface with a charge transfer from the organic layer to the anode material. This has been confronted to DFT calculations...
August 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28799750/complex-electron-transfer-pathway-at-a-microelectrode-captured-by-in-situ-nanospectroscopy
#8
Thomas Touzalin, Suzanne Joiret, Emmanuel Maisonhaute, Ivan Thomas Lucas
In the quest for analytical tools which enable the characterization of materials at the nanoscale and under the condition of their operation (in situ, operando), the emerging Tip-Enhanced Raman Spectroscopy (TERS) now enters the spotlight. We demonstrate in this work that a TERS tip can be functionalized and partially insulated to be used as a microelectrode enabling Electrochemical Substrate Enhanced Raman Spectroscopy (EC-SERS) at a single hotspot. This "SERS at a tip" experiment enables to capture the electrochemical transformation of a molecular layer self-assembled on a tapered gold microe-lectrode...
August 11, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28799406/a-polymorphic-ggc-repeat-in-the-npas2-gene-and-its-association-with-melanoma
#9
Alessandra Franzoni, Elitza Markova-Car, Sanja Dević-Pavlić, Davor Jurišić, Cinzia Puppin, Catia Mio, Marila De Luca, Giulia Petruz, Giuseppe Damante, Sandra Kraljević Pavelić
Circadian clock regulation in mammals is controlled by feedback loops of a set of circadian genes. One of these circadian genes, NPAS2, encodes for a member of the bHLH-PAS class of transcription factors and is expressed in the forebrain and in some peripheral organs such as liver and skin. Other biological processes are also regulated by circadian genes. For example, NPAS2 is involved in cell proliferation, DNA damage repair and malignant transformation. Aberrant expression of clock genes has been previously observed in melanoma which led to our effort to sequence the NPAS2 promoter region in this cancer type...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28798008/activity-recognition-in-individuals-walking-with-assistive-devices-the-benefits-of-device-specific-models
#10
Luca Lonini, Aakash Gupta, Susan Deems-Dluhy, Shenan Hoppe-Ludwig, Konrad Kording, Arun Jayaraman
BACKGROUND: Wearable sensors gather data that machine-learning models can convert into an identification of physical activities, a clinically relevant outcome measure. However, when individuals with disabilities upgrade to a new walking assistive device, their gait patterns can change, which could affect the accuracy of activity recognition. OBJECTIVE: The objective of this study was to assess whether we need to train an activity recognition model with labeled data from activities performed with the new assistive device, rather than data from the original device or from healthy individuals...
August 10, 2017: JMIR Rehabil Assist Technol
https://www.readbyqxmd.com/read/28797351/implant-and-midterm-outcomes-of-the-subcutaneous-implantable-cardioverter-defibrillator-registry-the-effortless-study
#11
Lucas Boersma, Craig Barr, Reinoud Knops, Dominic Theuns, Lars Eckardt, Petr Neuzil, Marcoen Scholten, Margaret Hood, Juergen Kuschyk, Paul Jones, Elizabeth Duffy, Michael Husby, Kenneth Stein, Pier D Lambiase
BACKGROUND: The subcutaneous implantable cardioverter-defibrillator (S-ICD) was developed to defibrillate ventricular arrhythmias, avoiding drawbacks of transvenous leads. The global EFFORTLESS S-ICD (Evaluation oF FactORs ImpacTing CLinical Outcome and Cost EffectiveneSS of the S-ICD) registry is collecting outcomes in 985 patients during a 5-year follow-up. OBJECTIVES: The primary goal of the EFFORTLESS registry is to determine the safety of the S-ICD by evaluating complications and inappropriate shock rate...
August 15, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28795878/effects-of-prisma%C3%A2-skin-dermal-regeneration-device-containing-glycosaminoglycans-on-human-keratinocytes-and-fibroblasts
#12
Raffaella Belvedere, Valentina Bizzarro, Luca Parente, Francesco Petrella, Antonello Petrella
Prisma® Skin is a new pharmaceutical device developed by Mediolanum Farmaceutici S.p.a. It includes alginates, hyaluronic acid and mainly mesoglycan. The latter is a natural glycosaminoglycan preparation containing chondroitin sulfate, dermatan sulfate, heparan sulfate and heparin and it is used in the treatment of vascular disease. Glycosaminoglycans may contribute to the re-epithelialization in the skin wound healing, as components of the extracellular matrix. Here we describe, for the first time, the effects of Prisma® Skin in in vitro cultures of adult epidermal keratinocytes and dermal fibroblasts...
August 10, 2017: Cell Adhesion & Migration
https://www.readbyqxmd.com/read/28792033/monolayer-to-thin-film-transition-in-supramolecular-assemblies-the-role-of-topological-protection
#13
Zachary P L Laker, Alexander J Marsden, Oreste De Luca, Ada Della Pia, Luís M A Perdigão, Giovanni Costantini, Neil R Wilson
The ability to control the transition from a two-dimensional (2D) monolayer to the three-dimensional (3D) molecular structure in the growth of organic layers on surfaces is essential for the production of functional thin films and devices. This has, however, proved to be extremely challenging, starting from the currently limited ability to attain a molecular scale characterization of this transition. Here, through innovative application of low-dose electron diffraction and aberration-corrected transmission electron microscopy (acTEM), combined with scanning tunneling microscopy (STM), we reveal the structural changes occurring as film thickness is increased from monolayer to tens of nanometers for supramolecular assembly of two prototypical benzenecarboxylic acids - terephthalic acid (TPA) and trimesic acid (TMA) - on graphene...
August 9, 2017: Nanoscale
https://www.readbyqxmd.com/read/28791329/clinical-impact-of-eus-treatment-of-walled-off-pancreatic-necrosis-with-dedicated-devices
#14
Ilaria Tarantino, Dario Ligresti, Fabio Tuzzolino, Luca Barresi, Gabriele Curcio, Antonino Granata, Mario Traina
BACKGROUND AND STUDY AIMS:  Walled-off pancreatic necrosis (WOPN) represents the major risk factor for sepsis-related multiple organ failure. Surgical debridement is an invasive approach associated with high rates of adverse events (AEs) and death. As an alternative, endoscopic ultrasound-guided cysto-gastro-anastomosis has emerged as an effective treatment for WOPNs. Recently a new dedicated-lumen apposing metal stent (LAMS) has been used with satisfactory results in treating peri-pancreatic fluid collections, including WOPNs...
August 2017: Endoscopy International Open
https://www.readbyqxmd.com/read/28782356/from-growth-surface-to-device-interface-preserving-metallic-fe-under-monolayer-hexagonal-boron-nitride
#15
Sabina Caneva, Marie-Blandine Martin, Lorenzo D'Arsie', Adrianus Indrat Aria, Hikmet Sezen, Matteo Amati, Luca Gregoratti, Hisashi Sugime, Santiago Esconjauregui, John Robertson, Stephan Hofmann, Robert S Weatherup
We investigate the interfacial chemistry between Fe catalyst foils and monolayer hexagonal boron nitride (h-BN) following chemical vapour deposition and during subsequent atmospheric exposure, using scanning electron microscopy, X-ray photoemission spectroscopy, and scanning photoelectron microscopy. We show that regions of the Fe surface covered by h-BN remain in a reduced state during exposure to moist air for ~40 hours at room temperature. This protection is attributed to the strong interfacial interaction between h-BN and Fe, which prevents the rapid intercalation of oxidizing species...
August 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28762961/endothelial-cell-responses-to-castor-oil-based-polyurethane-substrates-functionalized-by-direct-laser-ablation
#16
Lucas Cortella, Idágene A Cestari, Denise Guenther, Andrés Fabian Lasagni, Ismar Newton Cestari
Surface-induced thrombosis and lack of endothelialization are major drawbacks that hamper the widespread application of polyurethanes for the fabrication of implantable cardiovascular devices. Endothelialization of the blood-contacting surfaces of these devices may avoid thrombus formation and can be implemented by strategies that introduce micro and submicron patterns that favor adhesion and growth of endothelial cells. In this study, we used laser radiation to directly introduce topographical patterns in the low micrometer range on castor oil-based polyurethane, which is currently employed to fabricate cardiovascular devices...
August 1, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28757565/the-pharmaceutical-device-prisma-%C3%A2-skin-promotes-in-vitro-angiogenesis-through-endothelial-to-mesenchymal-transition-during-skin-wound-healing
#17
Raffaella Belvedere, Valentina Bizzarro, Luca Parente, Francesco Petrella, Antonello Petrella
Glycosaminoglycans are polysaccharides of the extracellular matrix supporting skin wound closure. Mesoglycan is a mixture of glycosaminoglycans such as chondroitin-, dermatan-, heparan-sulfate and heparin and is the main component of Prisma(®) Skin, a pharmaceutical device developed by Mediolanum Farmaceutici S.p.a. Here, we show the in vitro effects of this device in the new vessels formation by endothelial cells, since angiogenesis represents a key moment in wound healing. We found a strong increase of migration and invasion rates of these cells treated with mesoglycan and Prisma(®) Skin which mediate the activation of the pathway triggered by CD44 receptor...
July 25, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28754946/single-molecule-spectroscopy-of-lhcsr1-protein-dynamics-identifies-two-distinct-states-responsible-for-multi-timescale-photosynthetic-photoprotection
#18
Toru Kondo, Alberta Pinnola, Wei Jia Chen, Luca Dall'Osto, Roberto Bassi, Gabriela S Schlau-Cohen
In oxygenic photosynthesis, light harvesting is regulated to safely dissipate excess energy and prevent the formation of harmful photoproducts. Regulation is known to be necessary for fitness, but the molecular mechanisms are not understood. One challenge has been that ensemble experiments average over active and dissipative behaviours, preventing identification of distinct states. Here, we use single-molecule spectroscopy to uncover the photoprotective states and dynamics of the light-harvesting complex stress-related 1 (LHCSR1) protein, which is responsible for dissipation in green algae and moss...
August 2017: Nature Chemistry
https://www.readbyqxmd.com/read/28753023/transparent-and-highly-responsive-phototransistors-based-on-a-solution-processed-nanometers-thick-active-layer-embedding-a-high-mobility-electron-transporting-polymer-and-a-hole-trapping-molecule
#19
Lorenzo Caranzi, Giuseppina Pace, Mauro Sassi, Luca Beverina, Mario Caironi
Organic materials are suitable for light sensing devices showing unique features such as low cost, large area, and flexibility. Moreover, transparent photodetectors are interesting for smart interfaces, windows, and display-integrated electronics. The ease of depositing ultrathin organic films with simple techniques enables low light absorbing active layers, resulting in the realization of transparent devices. Here, we demonstrate a strategy to obtain high efficiency organic photodetectors and phototransistors based on transparent active layers with a visible transmittance higher than 90%...
August 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28752617/high-body-mass-index-is-a-predictor-of-left-ventricular-reverse-remodelling-in-heart-failure-with-reduced-ejection-fraction
#20
Arthur Cescau, Lucas N L Van Aelst, Mathilde Baudet, Alain Cohen Solal, Damien Logeart
AIMS: Structural and functional left ventricular alterations can occur in heart failure (HF), referred to as left ventricular reverse remodelling (LVRR). This study aimed to define novel predictors of LVRR besides well-known effects of medical and device therapy. METHODS AND RESULTS: From echographic database, we included 295 patients with both left ventricular ejection fraction (LVEF) ≤45% and indexed left ventricular end-diastolic diameter ≥33 mm/m(2) and who had at least two echocardiographic exams with a delay between 3 and 12 months...
July 27, 2017: ESC Heart Failure
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