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https://www.readbyqxmd.com/read/30334755/versatile-ultrasonic-spectrometer-for-liquids-with-practical-sample-handling-by-using-standard-cuvettes
#1
Marcelo M Tiago, Ricardo T Higuti, Luis Elvira, Claudio Kitano, Edvaldo Assuncao, Samuel L Oliveira
This work describes the development and tests of a new ultrasonic spectrometer for liquids based on the use of commercial cuvettes for sample handling. The spectrometer operates in the frequency range from 20 to 80 MHz and gathers some important characteristics, which are its high thermal stability (better than 0.01°C), by the use of Peltier cells, and practical sample handling with small volume (≤3 ml) samples placed inside cuvettes which can be easily removed from the spectrometer, cleaned/sterilized or simply discarded...
October 12, 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/30326970/progression-of-eales-disease-post-partum-and-long-term-follow-up-a-case-report
#2
Radu Ivanescu, Ciprian Ivanescu, Kai Januschowski, Augustin Ivanescu
BACKGROUND: Eales' disease is a difficult to treat idiopathic form of retinal vasculitis. We present such a case with peculiar epidemiology in which the only efficient therapeutic approach in order to maintain functional vision was repeated intravitreal dexamethasone implants (Ozurdex®). To the best of our knowledge this is the first report of this kind in the literature. CASE PRESENTATION: This is the case of a 40-year-old white woman presenting in 2008 with recurrent floaters accompanied by blurring of vision in her right eye and severe visual loss in her left eye caused by retinal detachment; her age at presentation was 30 years...
October 17, 2018: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/30323552/clinicopathological-features-of-epiretinal-membranes-in-eyes-filled-with-silicone-oil
#3
Yoshiaki Tanaka, Fumihiko Toyoda, Machiko Shimmura-Tomita, Nozomi Kinoshita, Hiroko Takano, Yoh Dobashi, Shigeki Yamada, Hiroto Obata, Akihiro Kakehashi
Purpose: The aim of this case series was to clarify the clinicopathological features of epiretinal membranes (ERMs) that developed in eyes after silicone oil (SO) tamponade to treat rhegmatog-enous retinal detachments (RRDs). Patients and methods: In the Department of Ophthalmology, Saitama Medical Center, Jichi Medical University, patients with idiopathic ERMs (23 eyes) and ERMs in eyes filled with SO (SO ERMs) after vitreous surgery to treat RRDs (nine eyes) were enrolled from July 2012 to March 2014...
2018: Clinical Ophthalmology
https://www.readbyqxmd.com/read/30322953/autologous-internal-limiting-membrane-flap-for-retinal-detachment-due-to-posterior-retinal-tears-over-choroidal-atrophy-in-highly-myopic-eyes
#4
Tommaso Rossi, Tomaso Caporossi, Stanislao Rizzo, Carlandrea Trillo, Serena Telani, Francesco Barca, Guido Ripandelli
PURPOSE: To review a series of highly myopic eyes with retinal detachment undergoing pars plana vitrectomy with autologous internal limiting membrane (ILM) flap placed over posterior retinal breaks located in areas of choroidal atrophy. METHODS: Retrospective review of 13 consecutive patients receiving pars plana vitrectomy with ILM flap over causative breaks, compared with 19 controls receiving the same surgery with ILM peeling but no ILM flap. Main outcome measures included anatomical success rate, visual acuity, number of surgeries and the rate of silicone oil removal...
October 15, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/30315809/holographic-characterization-of-protein-aggregates-in-the-presence-of-silicone-oil-and-surfactants
#5
Priya N O Kasimbeg, Fook Chiong Cheong, David B Ruffner, Jaroslaw M Blusewicz, Laura A Philips
Characterizing protein aggregates in the presence of silicone oil is a long standing challenge for the pharmaceutical industry. Silicone oil is often used as a lubricant in devices that deliver and store therapeutic protein products, and has been linked to protein aggregation, which can compromise a drug's effectiveness or cause autoimmune responses in patients. Most traditional technologies cannot quantitatively distinguish protein aggregates and silicone oil in their native formulations for sizes less than 5 μm...
October 10, 2018: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/30308563/incidence-and-risk-factors-for-hypotony-after-25-gauge-pars-plana-vitrectomy-with-nonexpansile-endotamponade
#6
Michael Mimouni, Hamza Abualhasan, Laura Derman, Assaf Feldman, Fares Mazzawi, Yoreh Barak
PURPOSE: The purpose of this study was to assess the incidence and risk factors for early postoperative hypotony after 25-gauge pars plana vitrectomy with nonexpansile endotamponade. METHODS: A retrospective study of consecutive patients who underwent 25-G pars plana vitrectomy. Hypotony was defined as an intraocular pressure of 5 mmHg or less after surgery and ocular hypertension as an intraocular pressure greater than 21 mmHg. RESULTS: Overall, 307 eyes of 307 patients with a mean age of 61...
October 9, 2018: Retina
https://www.readbyqxmd.com/read/30307011/facile-scalable-fabrication-of-ultra-thin-freestanding-sio-2-based-hybrid-nanosheets-with-multifunctional-properties
#7
Xinping Zhang, Huicheng Ren, Aihua He
Two-dimensional (2D) nanomaterials with unique features like a large surface-to-volume ratio and the quantum confinement effect have attracted great attention for applications in energy storage, catalysis, sensing, membranes, etc. Silica (SiO2)-based nanosheets, as members of the 2D material family, are extremely intriguing because of their unique electronic insulation, bio-compatibility and profound chemical and thermal stability. However, there is still a lack of available approaches for fabricating SiO2 nanosheets in a simple, large-scale and cost-effective fashion...
October 11, 2018: Nanoscale
https://www.readbyqxmd.com/read/30305959/retrospective-comparison-of-27-gauge-and-25-gauge-microincision-vitrectomy-surgery-with-silicone-oil-for-the-treatment-of-primary-rhegmatogenous-retinal-detachment
#8
Jie Li, Bo Zhao, Sanmei Liu, Fang Li, Wentao Dong, Jie Zhong
Aim: To retrospectively compare the safety and effectiveness of 27-gauge (27G) microincision vitrectomy surgery (MIVS) with 25-guage (25G) MIVS for the treatment of primary rhegmatogenous retinal detachment (RRD) with silicone oil tamponade. Methods: Ninety-two patients with RRD who underwent MIVS from May 1, 2015, to June 30, 2017, were included in this study. Fifty-eight eyes underwent 25G MIVS and 34 eyes underwent 27G MIVS. We analyzed the characteristics of the patients, surgical time, main clinical outcomes, and rate of complications...
2018: Journal of Ophthalmology
https://www.readbyqxmd.com/read/30300548/ph-and-temperature-dual-responsive-plasmonic-switches-of-gold-nanoparticle-monolayer-film-for-multiple-anti-counterfeit
#9
Baoqing Liu, Xuefei Lu, Ze Qiao, Liping Song, Qian Cheng, Jiawei Zhang, Afang Zhang, Youju Huang, Tao Chen
Two-dimensional (2D) gold nanoparticle (Au NP) monolayer film possesses a lot of fascinating peculiarities, and has shown promising applications in photoelectrical device, catalysis, spectroscopy, sensor and anti-counterfeiting. Due to localized surface plasmon resonance (LSPR) property predetermined by the nature structure of metal nanoparticle, it is usually difficult to realize reversible LSPR transition of 2D film. In this work, we report on fabrication of a large-area free-standing Au NP monolayer film with dual-responsive switchable plasmonic property using a pH- or thermal-responsive dendronized copolymer as stimuli-sensitive linker between neighbored NPs...
October 9, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/30298898/opposed-flow-focusing-evidence-of-a-second-order-jetting-transition
#10
Jun Dong, Max Meissner, Malcolm A Faers, Jens Eggers, Annela M Seddon, C Patrick Royall
We propose a novel microfluidic "opposed-flow" geometry in which the continuous fluid phase is fed into a junction in a direction opposite to the dispersed phase. This pulls out the dispersed phase into a micron-sized jet, which decays into micron-sized droplets. As the driving pressure is tuned to a critical value, the jet radius vanishes as a power law down to sizes below 1 μm. By contrast, the conventional "coflowing" junction leads to a first order jetting transition, in which the jet disappears at a finite radius of several μm, to give way to a "dripping" state, resulting in much larger droplets...
October 9, 2018: Soft Matter
https://www.readbyqxmd.com/read/30296419/impact-of-ethylene-oxide-sterilization-of-polymer-based-prefilled-syringes-on-chemical-degradation-of-a-model-therapeutic-protein-during-storage
#11
Kaori Funatsu, Hideaki Kiminami, Yoshihiko Abe, John F Carpenter
Materials from prefilled syringes systems -- such as silicone oil, tungsten, glass and rubber -- may enhance therapeutic protein aggregation and particle formation. Also, the sterilization method used for syringes may impact aggregation and chemical degradation of biologics during storage. Syringes are generally sterilized by radiation, ethylene oxide gas (EO) or steam. Among the sterilization methods, EO has the potential to cause chemical degradation by the formation of adducts with susceptible amino acid residues in the protein...
October 5, 2018: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/30288467/surface-patterning-with-sio-2-pnipam-core-shell-particles
#12
Jo Sing Julia Tang, Romina Sigrid Bader, Eric S A Goerlitzer, Jan Fedja Wendisch, Gilles Remi Bourret, Marcel Rey, Nicolas Vogel
Colloidal lithography is a cost-efficient method to produce large-scale nanostructured arrays on surfaces. Typically, colloidal particles are assembled into hexagonal close-packed monolayers at liquid interfaces and deposited onto a solid substrate. Many applications, however, require non close-packed monolayers, which are more difficult to fabricate. Preassembly at the oil/water interface provides non close-packed colloidal assemblies but these are difficult to transfer to a solid substrate without compromising the ordering due to capillary forces acting upon drying...
September 30, 2018: ACS Omega
https://www.readbyqxmd.com/read/30284388/vitrectomy-with-silicone-oil-tamponade-for-retinal-detachment-associated-with-giant-retinal-tears-favourable-outcomes-without-adjuvant-scleral-buckling
#13
Mumin Hocaoglu, Murat Karacorlu, M Giray Ersoz, Isil Sayman Muslubas, Serra Arf
PURPOSE: To evaluate the outcomes of pars plana vitrectomy with silicone oil tamponade in the management of retinal detachment associated with giant retinal tears. METHODS: We reviewed 45 eyes of 42 patients with primary retinal detachment associated with giant retinal tears over 10 years at a tertiary referral centre. Patients underwent 23-gauge vitrectomy without adjuvant scleral buckling by a single surgeon and had follow-up at least 6 months after silicone oil removal...
October 3, 2018: Acta Ophthalmologica
https://www.readbyqxmd.com/read/30283327/case-series-of-inappropriate-concentration-of-intraocular-sulfur-hexafluoride
#14
Piotr Kanclerz, Andrzej Grzybowski
Due to high complexity, vitreoretinal surgery presents a higher number of patient safety incidents compared with other ophthalmic procedures. Intraocular gases are one of the most useful adjuncts to vitrectomy and surprisingly, surgeons commonly admit to having occasional problems with incorrect gas concentration. The aim of this study is to present a consecutive case series of patients with improper concentration of sulfur hexafluoride (SF6 ) applied during vitrectomy. Three patients underwent 27-gauge vitrectomy and at the end of surgery inappropriate dilution of 100% SF6 was administered...
May 2018: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/30263148/-burkholderia-cepacia-a-cause-of-post-pars-plana-vitrectomy-silicone-oil-related-endophthalmitis-clinico-pathological-presentation-and-outcome-of-management
#15
Ogugua Ndubuisi Okonkwo, Adekunle Olubola Hassan, Olufemi Oderinlo, Michael Ekuoba Gyasi
Aim: To report the long-term outcome of the management of a series of culture proven post pars plana vitrectomy endophthalmitis in which the infective agent was in the silicone oil used as an endotamponade. The isolates were Burkholderia cepacia and Pseudomonas aeruginosa . Method: A retrospective interventional reporting of a series consisting of a cluster of five cases. Cases: Five consecutive patients received the same batch of 5000-centistoke silicone oil as endotamponade at the conclusion of vitreoretinal surgery and presented with features of acute intraocular inflammation, which was due to an infective cause...
2018: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/30256955/technical-note-development-of-a-pressure-sensor-based-system-for-measuring-rumination-time-in-pre-weaned-dairy-calves
#16
Mehdi Eslamizad, Lisa-Maria Tümmler, Michael Derno, Matthias Hoch, Björn Kuhla
The pressure-based noseband sensor system (RWS: RumiWatch System; ITIN + HOCH GmbH Feeding Technology, Liestal, Switzerland) has recently been validated for the measurement of rumination time in mature cows. We aimed in this study at developing a similar pressure-based system for monitoring rumination in young dairy calves. To this end, a vegetable oil-filled silicon tube with a built-in pressure sensor (outer diameter 5.7 mm, length 38 cm) was attached to the noseband of a calf halter. In contrast to the RWS developed for mature cows, the accelerometer, the battery, the data logger, and the SD card of the RWS were integrated into 1 box to reduce the weight of the RWS to 0...
September 25, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/30253355/high-internal-phase-water-in-oil-emulsions-stabilized-by-food-grade-starch
#17
Qiang Zhao, Lingxiang Jiang, Zhen Lian, Ezat Khoshdel, Stephan Schumm, Jianbin Huang, Qiqing Zhang
Water in oil emulsions would be prepared by silicones (SO), modified silicones (DC8500) and a food-grade stabilizer (starch 1). With increasing water contents, the emulsions turned from a liquid-like to gel-like behaviors with enhancing storage and loss modulus. When DC8500/SO was 1/17 with 10 wt% starch 1, a high internal phase emulsion can be obtained with 95 wt% water content. DC8500 and SO worked as efficient emulsifiers and possessed amphiphilic property to form emulsions with water in different ratios...
September 18, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/30249835/surgical-removal-of-subfoveal-perfluorocarbon-liquid-using-combined-flute-needle-and-vacuum-aspiration-in-silicone-oil-filled-eyes-a-novel-technique-to-remove-subfoveal-pfcl
#18
Qintuo Pan, Yuxuan Deng, Wencan Wu, Zhenquan Zhao
We report a procedure using a pressure-controllable flute needle to remove subfoveal retention of perfluorocarbon liquid (PFCL) under silicone oil. With a two-port pars plana approach, we used a 27-gauge dental injection needle to create a retinotomy at the farthest edge of the PFCL bubble from the fovea. A 27-gauge flute needle was then inserted into the edge of the subfoveal PFCL to aspirate it with vacuum pressure. Three patients with subfoveal retained PFCL were treated by this procedure within silicone oil tamponade 1 month after the first operation...
October 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/30246566/pars-plana-vitrectomy-with-silicone-oil-tamponade-for-primary-and-secondary-macular-hole-closure-is-it-still-a-useful-procedure
#19
Janusz Pieczynski, Patrycja Kuklo, Andrzej Grzybowski
PURPOSE: To evaluate usefulness of posterior vitrectomy with silicone oil tamponade for primary and secondary macular hole closure. METHODS: We searched for publications on the surgical treatment of full-thickness idiopathic and recurrent macular hole. We divided reports into two groups: primary macular hole repair and recurrent macular hole repair with silicone oil tamponade. RESULTS: In primary macular hole treatment, different authors confirmed effectiveness of silicone oil tamponade...
September 2018: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/30236931/recovery-of-cutting-fluids-and-silicon-carbide-from-slurry-waste
#20
Zih-Yao Shen, Chi-Yao Chen, Maw-Tien Lee
The wafer slicing process generates large amounts of slurry waste. The recovery of cutting oil and abrasives from slurry waste can reduce both the cost and environmental damage. A process combining magnetic precipitation and flocculation was developed for the recovery of cutting oil. A magnetic precipitation tank was employed for storage of the slurry and acceleration of the settlement of suspended particles. The larger particles further aggregate upon adding a non-aqueous flocculant comprising polyacrylamide (PAM) and ethylene glycol (EG)...
January 15, 2019: Journal of Hazardous Materials
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