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https://www.readbyqxmd.com/read/28728182/endophthalmitis-and-concurrent-or-delayed-onset-rhegmatogenous-retinal-detachment-managed-with-pars-plana-vitrectomy-intravitreal-antibiotics-and-silicone-oil
#1
Vivek Pravin Dave, Avinash Pathengay, Nidhi Relhan, Pranjali Sharma, Subhadra Jalali, Rajeev Reddy Pappuru, Mudit Tyagi, Raja Narayanan, Jay Chhablani, Taraprasad Das, Harry W Flynn
BACKGROUND AND OBJECTIVE: The current study describes the treatment outcomes in patients with endophthalmitis and concurrent or delayed-onset retinal detachment managed with pars plana vitrectomy, intravitreal antibiotics, and silicone oil. PATIENTS AND METHODS: In this noncomparative, retrospective case series, the medical records of patients diagnosed with endophthalmitis and retinal detachment from January 1991 through December 2014 at a tertiary eye care center in South India were reviewed...
July 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28728033/deposition-pattern-and-tracer-particle-motion-of-evaporating-multi-component-sessile-droplets
#2
Muhammad Amjad, Yang Yang, Ghulam Raza, Hui Gao, Jun Zhang, Leping Zhou, Xiaoze Du, Dongsheng Wen
The understanding of near-wall motion, evaporation behavior and dry pattern of sessile nanofluid droplets is fundamental to a wide range of applications such as painting, spray drying, thin film coating, fuel injection and inkjet printing. However, a deep insight into the heat transfer, fluid flow, near-wall particle velocity and their effects on the resulting dry patterns is still much needed to take the full advantage of these nano-sized particles in the droplet. This work investigates the effect of direct absorptive silicon/silver (Si/Ag) hybrid nanofluids via two experiments...
July 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28727605/in-vitro-compatibility-of-contact-lenses-with-corneal-epithelial-cells
#3
Ajay K Vijay, Zohra Fadli, Carol Lakkis, Chantal Coles-Brennan, Mark D P Willcox
PURPOSE: To determine the interaction of contact lenses of different materials with corneal epithelial cells grown in tissue culture. METHODS: Two different corneal epithelial cell lines were grown to confluence in culture media. Two hydrogel contact lenses with and without polyvinylpyrrolidone (PVP) {1-DAY ACUVUE MOIST (1-Day ACUVUE [hydrogel lenses]) and a silicone hydrogel contact lens, AIR OPTIX NIGHT & DAY} were removed from their blister packs, washed in phosphate-buffered saline, and applied to the cells...
July 18, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28727562/a-digitally-dynamic-power-supply-technique-for-16-channel-12-v-tolerant-stimulator-realized-in-a-0-18-%C3%AE-m-1-8-v-3-3-v-low-voltage-cmos-process
#4
Zhicong Luo, Ming-Dou Ker, Tzu-Yi Yang, Wan-Hsueh Cheng
A new digitally dynamic power supply technique for 16-channel 12-V-tolerant stimulator is proposed and realized in a 0.18-μm 1.8-V/3.3-V CMOS process. The proposed stimulator uses four stacked transistors as the pull-down switch and pull-up switch to withstand 4 times the nominal supply voltage (4 × V DD). With the dc input voltage of 3.3 V, the regulated three-stage charge pump, which is capable of providing 11.3-V voltage at 3-mA loading current, achieves dc conversion efficiency of up to 69% with 400-pF integrated capacitance...
July 18, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28727435/wettability-effect-on-evaporation-dynamics-and-crystalline-patterns-of-sessile-saline-droplets
#5
Xin Zhong, Junheng Ren, Fei Duan
The evaporative dynamics and crystalline patterns from sessile saline droplets on various substrates are experimentally investigated. On the silicon wafer and polymethyl methacrylate (PMMA) plate, the saline droplets exhibit unique evaporative dynamics such that the contact angle keeps increasing for a lasting period. Such an enlargement in contact angle is attenuated at a higher salt concentration. Interestingly, the onset of precipitation is almost overlapped with the end of contact angle enlargement when the contact angle reaches its apex...
July 20, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28727236/structural-and-electronic-flexibility-in-hydrides-of-zintl-phases-with-tetrel-hydrogen-and-tetrel-tetrel-bonds
#6
Henry Auer, Holger Kohlmann
The hydrogenation of Zintl phases enables the formation of new structural entities with main group element-hydrogen bonds in the solid state. The hydrogenation of SrSi, BaSi and BaGe yields the hydrides SrSiH5/3-x, BaSiH5/3-x and BaGeH5/3-x, whose crystal structures were solved by a combination of X-ray, neutron and electron diffraction. Layers of connected HSr4 (HBa4) tetrahedra containing hydride ions alternate with layers of infinite single- and double-chain polyanions, where hydrogen atoms are covalently bound to silicon and germanium...
July 20, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28727233/optimal-pessary-care-a-modified-delphi-consensus-study
#7
Gwendolyn L Hooper, Shanna Atnip, Katharine O'Dell
INTRODUCTION: Support pessaries are an important, low-risk treatment option for women with vaginal prolapse but evidence to inform optimal practice is lacking. Currently, gynecologists, urologists, and urogynecologists recommend silicone vaginal support pessaries as first-line treatment for symptomatic vaginal prolapse in women of all ages. It is unknown how many providers who are not physicians prescribe and care for women using pessaries. For this study we attempted to collect opinions of expert nurse providers who fit pessaries on topics related to pessary care and management in an effort to develop consensus to guide practice...
July 20, 2017: Journal of Midwifery & Women's Health
https://www.readbyqxmd.com/read/28726908/mn-4-li-co-doped-srmgal10o17-phosphor-in-glass-application-in-high-power-warm-w-leds
#8
Jiasong Zhong, Wei Xu, Qingli Chen, Shuo Yuan, Zhengguo Ji, Daqin Chen
Currently, the shortage of red components and easy aging of organic silicone still remain challenges for high-power phosphor-converted warm white light-emitting diodes (w-LEDs). Aiming to alleviate these issues, phosphor-in-glass (PiG), fabricated by co-sintering red- and yellow-emitting phosphors and low-melting glass, has been regarded as a promising color converter for w-LEDs. In this study, a Li(+),Mn(4+) co-doped SrMgAl10O17 red phosphor was synthesized via a conventional solid-state reaction. The as-prepared phosphor exhibits a deep red emission, ascribed to Mn(4+):(2)Eg → (4)A2g spin-forbidden transition in the range of 600-700 nm with a narrow-band full width at half maximum of 55 nm, and provides an ideal broadband excitation extending from 250 to 530 nm...
July 20, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28726882/trimethylsilyl-hedgehogs-a-novel-class-of-super-efficient-hydrocarbon-surfactants
#9
Adam Czajka, Christopher Hill, Jocelyn Peach, Jonathan C Pegg, Isabelle Grillo, Frédéric Guittard, Sarah E Rogers, Masanobu Sagisaka, Julian Eastoe
Presented here are the results for a novel class of hydrocarbon surfactants, termed trimethylsilyl hedgehogs (TMS-hedgehogs), due to the presence of silicon in the tails. By comparing the surface properties of these hybrid hedgehogs to purely hydrocarbon equivalents, links between performance and the structure are made. Namely, by controlling the molecular volume of the surfactant fragments, improvements can be made in surface coverage, generating lower surface energy monolayers. Small-angle neutron scattering (SANS) data have been collected showing that these novel surfactants aggregate to form ellipsoidal micelles which grow with increasing concentration...
July 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28726683/canonical-ensemble-extended-lagrangian-born-oppenheimer-molecular-dynamics-for-the-linear-scaling-density-functional-theory
#10
Teruo Hirakawa, Teppei Suzuki, David R Bowler, Tsuyoshi Miyazaki
We discuss the development and implementation of a constant temperature (NVT) molecular dynamics scheme that combines the Nosé-Hoover chain thermostat with the extended Lagrangian Born-Oppenheimer molecular dynamics (BOMD) scheme, using a linear scaling density functional theory (DFT) approach. An integration scheme for this canonical-ensemble extended Lagrangian BOMD is developed and discussed in the context of the Liouville operator formulation. Linear scaling DFT canonical-ensemble extended Lagrangian BOMD simulations are tested on bulk silicon and silicon carbide systems to evaluate our integration scheme...
July 20, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28726682/broadband-non-contact-characterization-of-epitaxial-graphene-by-near-field-microwave-microscopy
#11
Sijia Gu, Xin Zhou, Tianjun Lin, Henri Happy, Tuami Lasri
In this paper, a broadband non-destructive and non-contact local characterization of graphene fabricated by epitaxial method on silicon carbide is demonstrated by using an interferometer-based near-field microwave microscope. First, a method has been proposed to extract the dielectric properties of silicon carbide, and finally, the graphene flake has been characterized as a resistance (∼20 kΩ) and a small inductance (360 pH) in the frequency band (2-18 GHz). The advantage of the proposed method is that there is no need to fabricate electrodes on the sample surface for the characterization...
July 20, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28726681/a-novel-cylindrical-microwell-featuring-inverted-pyramidal-opening-for-efficient-cell-spheroid-formation-without-cell-loss
#12
Jae Min Cha, HyungDal Park, Eun Kyoung Shin, Ji Hee Sung, Ockchul Kim, Woohyun Jung, Oh Young Bang, Jinseok Kim
Spheroid cultures have been often used to simulate and understand in situ biological occurrences with potential to be further applied to therapeutic approaches, such as cell transplantation. However, traditional lab-scale techniques hardly reached the needed large scale production of cell spheroids, thus limiting their versatility in many biomedical fields. Microscale technologies have rapidly improved in the last decade, and contributed to the large scale production of cell spheroids with high controllability and reproducibility...
July 20, 2017: Biofabrication
https://www.readbyqxmd.com/read/28725906/covalent-bonding-assisted-nanotransfer-lithography-for-the-fabrication-of-plasmonic-nano-optical-elements
#13
Soon Hyoung Hwang, Sohee Jeon, Myung Ju Kim, Dae-Geun Choi, Jun-Hyuk Choi, Joo-Yun Jung, Kwang-Seop Kim, Jihye Lee, Jun Ho Jeong, Jae Ryoun Youn
Many high-resolution patterning techniques have been developed to realize nano- and microscale applications of electric devices, sensors, and transistors. However, conventional patterning methods based on photo or e-beam lithography are not employed to fabricate optical elements of high aspect ratio and a sub-100 nm scale due to the limit of resolution, high costs and low throughput. In this study, covalent bonding-assisted nanotransfer lithography (CBNL) was proposed to fabricate various structures of high resolution and high aspect ratio at low cost by a robust and fast chemical reaction...
July 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28725218/all-new-faces-of-diatoms-potential-source-of-nanomaterials-and-beyond
#14
REVIEW
Meerambika Mishra, Ananta P Arukha, Tufail Bashir, Dhananjay Yadav, G B K S Prasad
Nature's silicon marvel, the diatoms have lately astounded the scientific community with its intricate designs and lasting durability. Diatoms are a major group of phytoplanktons involved in the biogeochemical cycling of silica and are virtually inherent in every environment ranging from water to ice to soil. The usage of diatoms has proved prudently cost effective and its handling neither requires costly materials nor sophisticated instruments. Diatoms can easily be acquired from the environment, their culture requires ambient condition and does not involve any costly media or expensive instruments, besides, they can be transported in small quantities and proliferated to a desirable confluence from that scratch, thus are excellent cost effective industrial raw material...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28725052/monolithically-integrated-te-mode-1d-silicon-on-insulator-isolators-using-seedlayer-free-garnet
#15
Cui Zhang, Prabesh Dulal, Bethanie J H Stadler, David C Hutchings
The first experimental TE-mode silicon-on-insulator (SOI) isolators using Faraday Rotation are here realized to fill the 'missing link' in source-integrated near infrared photonic circuits. The isolators are simple 1D 2-element waveguides, where garnet claddings and longitudinal magnetic fields produce nonreciprocal mode conversion, the waveguide equivalent of Faraday Rotation (FR). Quasi-phase matched claddings are used to overcome the limitations of birefringence. Current experimental SOI isolators use nonreciprocal phase shift (NRPS) in interferometers or ring resonators, but to date NRPS requires TM-modes, so the TE-modes normally produced by integrated lasers cannot be isolated without many ancillary polarisation controls...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724901/real-time-and-label-free-chemical-sensor-on-a-chip-using-monolithic-si-on-batio3-mid-infrared-waveguides
#16
Tiening Jin, Leigang Li, Bruce Zhang, Hao-Yu Greg Lin, Haiyan Wang, Pao Tai Lin
Chip-scale chemical detection is demonstrated by using mid-Infrared (mid-IR) photonic circuits consisting of amorphous silicon (a-Si) waveguides on an epitaxial barium titanate (BaTiO3, BTO) thin film. The highly c-axis oriented BTO film was grown by the pulsed laser deposition (PLD) method and it exhibits a broad transparent window from λ = 2.5 μm up to 7 μm. The waveguide structure was fabricated by the complementary metal-oxide-semiconductor (CMOS) process and a sharp fundamental waveguide mode has been observed...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28723200/flexible-transparent-and-free-standing-silicon-nanowire-sers-platform-for-in-situ-food-inspection
#17
Hao Cui, Shuoyu Li, Shaozhi Deng, Huanjun Chen, Chengxin Wang
We demonstrated a flexible transparent and free-standing Si nanowire paper (SiNWP) as a surface enhanced Raman scattering (SERS) platform for in situ chemical sensing on warping surfaces with high sensitivity. The SERS activity has originated from the three-dimension interconnected nanowire network structure and electromagnetic coupling between closely separated nanowires in the SiNWP. In addition, the SERS activity can be highly improved by functionalizing the SiNWP with plasmonic Au nanoparticles. The hybrid substrate not only showed excellent reproducibility and stability of the SERS signal, but also maintained the flexibility and transparency of the pristine SiNWP...
March 24, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28723190/in-search-of-the-ultimate-benzene-sensor-the-etqxbox-solution
#18
Jakub W Trzciński, Roberta Pinalli, Nicolò Riboni, Alessandro Pedrini, Federica Bianchi, Stefano Zampolli, Ivan Elmi, Chiara Massera, Franco Ugozzoli, Enrico Dalcanale
In this work we report a comprehensive study leading to the fabrication of a prototype sensor for environmental benzene monitoring. The required high selectivity and ppb-level sensitivity are obtained by coupling a silicon-integrated concentration unit containing the specifically designed EtQxBox cavitand to a miniaturized PID detector. In the resulting stand-alone sensor, the EtQxBox receptor acts at the same time as highly sensitive preconcentrator for BTEX and GC-like separation phase, allowing for the selective desorption of benzene over TEX...
April 28, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28723185/silanization-of-sapphire-surfaces-for-optical-sensing-applications
#19
Tanja Sandner, Annina M Steinbach, Peter Knittel, Thomas Diemant, R Jürgen Behm, Steffen Strehle, Christine Kranz, Boris Mizaikoff
Well-characterized silane layers are essential for optimized attachment of (bio)molecules enabling reliable chem/biosensor performance. Herein, binding properties and orientation of 3-mercaptopropyltrimethoxysilane layers at crystalline sapphire (0001) surfaces were determined by water contact angle measurements, infrared reflection absorption spectroscopy, atomic force microscopy, and X-ray photoelectron spectroscopy. Infrared reflection absorption spectroscopy measurements suggest an almost perpendicular arrangement of the MPTMS molecules to the substrate surface...
April 28, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28723141/disperse-and-collect-approach-for-the-type-selective-detection-of-matrix-metalloproteinases-in-porous-silicon-resonant-microcavities
#20
Fransiska S H Krismastuti, Melissa R Dewi, Beatriz Prieto-Simon, Thomas Nann, Nicolas H Voelcker
We report on the design and testing of photonic biosensors for the type-selective detection of different types of matrix metalloproteinases (MMPs). The ability to detect a panel of different MMP types has important implications for prognosis of wound healing. We combine the immunocapture of MMPs on dispersed magnetic nanoparticles modified with antibodies specific for target MMPs (immuno-magNPs) with subsequent MMP detection upon fluorogenic peptide cleavage in porous silicon resonant microcavity (pSiRM) architectures...
February 24, 2017: ACS Sensors
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