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silicon oil

Soumita Maiti, Nitish Singh, Animangsu Ghatak
Reversible alteration between different emulsion morphologies like core-shell and Janus is conventionally triggered by altering the interfacial energy between different phases. In contrast, here we show that the morphology of dispersed droplets can change also when the emulsion is sufficiently confined between two parallel plates. In particular we use three immiscible phases: silicone oil, paraffin oil and aqueous solution of surface active agents like Agarose, SDS, AOT, CTAB to generate oil in water emulsion consisting of complex morphologies of the dispersed droplets...
February 18, 2019: Langmuir: the ACS Journal of Surfaces and Colloids
Sergio E Hernández-Da Mota, Rafael Castañeda-Diez, María Teresa Zavala-Martínez
Background: Pupillary block induced by silicon oil in vitrectomized patients is a common condition usually treated with Nd-YAG laser iridotomy or with surgical removal of silicon oil. Case report: A case of silicone oil pupillary block glaucoma successfully treated with a 30 G needle transfixion technique is described. We performed a non-complicated vitrectomy surgery for retinal detachment with proliferative vitreoretinopathy that included lensectomy, inferior peripheral iridectomy, and silicone oil injection...
2019: Cirugia y Cirujanos
Trefor A Evans, Sebastien Breugnot
A commercially-available instrument, previously intended to visualize and quantify hair shape and volume, has been modified to measure hair motion. Specifically, a transversal motor now induces a side-to-side oscillating tress stimulus, while a video camera records the outcome. Image analysis software allows for quantifying the amount of motion (i.e. the amplitude), the shape and volume of the hair during motion, and the homogeneity of the hair (i.e. bulk -vs- flyaways). Each of these parameters has considerable dependence on the frequency of oscillation and so evaluations are carried out by systematically varying this parameter...
September 2018: Journal of Cosmetic Science
Seung Hyuk Kwon, Hyung Hoon Sim, Hyoung Jin Choi
Biopolymeric Arabic gum (AG) coated carbonyl iron (CI) particles were synthesized using a solvent casting process, and then their coating was confirmed using scanning electron microscopy analysis. Thermal property and chemical structure of the produced AG coated CI particles were investigated by thermalgravimetric analysis and Fourier transform infrared spectroscopy. In addition, from the measurement using vibration sample magnetometer, magnetic properties including saturation magnetization were also observed...
July 1, 2019: Journal of Nanoscience and Nanotechnology
Gang Seok Jeon, Jae Ryong Han
PURPOSE: To assess treatment efficacy of scleral buckling surgery with wide-field surgical microscope and 27-gauge (G) chandelier illumination for rhegmatogenous retinal detachment (RRD). METHODS: This study is a retrospective chart review of 29 eyes in 29 patients with RRD who underwent scleral buckling surgery with a wide-field surgical microscope and 27-G chandelier illumination fiber inserted into the sclera at the pars plana. Results are expressed as mean ± standard deviation...
February 14, 2019: Ophthalmologica. Journal International D'ophtalmologie
Masato Ueshima, Hirofumi Sakanakura
In the preparation of thin sections for microscopy, embedding and polishing processes in particular can change the composition and morphologies of samples. Soils and ashes are very fragile and solvent-susceptible, and appropriate sample preparation procedures have not been well-established. To improve the existing preparation methods and make them easier and faster, we embedded freeze-dried blocks, polished, and then examined these thin-section samples using polarization microscopy, laser microscopy, and field emission scanning electron microscopy with energy-dispersive X-ray spectrometry, and electron backscattered diffraction (EBSD)...
February 13, 2019: Microscopy and Microanalysis
Sudeshna Roy, Bert J Scheper, Harmen Polman, Anthony R Thornton, Deepak R Tunuguntla, Stefan Luding, Thomas Weinhart
Two-dimensional Particle Tracking Velocimetry (PTV) is a promising technique to study the behaviour of granular flows. The aim is to experimentally determine the free surface width and position of the shear band from the velocity profile to validate simulations in a split-bottom shear cell geometry. The position and velocities of scattered tracer particles are tracked as they move with the bulk flow by analyzing images. We then use a new technique to extract the continuum velocity field, applying coarse-graining with the postprocessing toolbox MercuryCG on the discrete experimental PTV data...
February 13, 2019: European Physical Journal. E, Soft Matter
Veasna Soum, Yunpyo Kim, Sooyong Park, Mary Chuong, Soo Ryeon Ryu, Sang Ho Lee, Georgi Tanev, Jan Madsen, Oh-Sun Kwon, Kwanwoo Shin
In order to fabricate a digital microfluidic (DMF) chip, which requires a patterned array of electrodes coated with a dielectric film, we explored two simple methods: Ballpoint pen printing to generate the electrodes, and wrapping of a dielectric plastic film to coat the electrodes. For precise and programmable printing of the patterned electrodes, we used a digital plotter with a ballpoint pen filled with a silver nanoparticle (AgNP) ink. Instead of using conventional material deposition methods, such as chemical vapor deposition, printing, and spin coating, for fabricating the thin dielectric layer, we used a simple method in which we prepared a thin dielectric layer using pre-made linear, low-density polyethylene (LLDPE) plastic (17-μm thick) by simple wrapping...
February 7, 2019: Micromachines
Zhengbin He, Lijie Qu, Zhenyu Wang, Jing Qian, Songlin Yi
The hygroexpansion and anisotropy of wood limit its application in construction and wood products industry. Zinc chloride-silicone oil was use to decrease the hygroscopicity and improve the dimensional stability of wood at 80 °C, 140 °C, 160 °C and 180 °C. The effects of the treatment on the dimensional stability, chemical structure, thermal degradation, morphology of wood were evaluated, and the mechanism was determined. Results indicated that the zinc chloride-silicone oil treatment at 80 °C improved the dimensional stability and decreased the hygroscopicity of wood...
February 7, 2019: Scientific Reports
H Michael Gach
PURPOSE: To identify an inexpensive, low-dielectric liquid for large MRI phantoms that can be used at multiple magnetic field strengths. METHODS: The T1 and T2 of four candidate phantom liquids (pure mineral oil, food-grade white mineral oil, silicone oil, and glycerol) with low dielectric constants were measured at three field strengths (0.35, 1.5, and 3 T) and extrapolated for 7 T. The complex permittivities of the liquids were measured for frequencies from 13 MHz to 600 MHz...
February 5, 2019: Medical Physics
Liam Ronald John Scarratt, Liwen Zhu, Chiara Neto
Lubricant-infused surfaces have attracted great attention recently and are described as slippery (SLIPS). Here we measured hydrodynamic drainage forces on SLIPS by colloid probe atomic force microscopy (AFM) and quantified the effective slip length over a nano-thin silicone oil layer on hydrophobized (OTS-coated) silicon wafers. The thickness of a stable silicone oil film on OTS-Si under sucrose solution was determined to be 1.8 ± 1.3 nm, and found to induce an average effective slip length of 29 ± 3 nm, very close to that of an uninfused OTS substrate...
February 5, 2019: Langmuir: the ACS Journal of Surfaces and Colloids
Narayan Lal Jain, Shyam Lal Soni, M P Poonia, Dilip Sharma, Anmesh K Srivastava, Hardik Jain
Vegetable oils are found suitable alternate of diesel fuel as per the results of short-run studies. Long-run studies with vegetable oil as a fuel pointed out the problems related to wear and maintenance of the engine. A single cylinder, variable compression ratio diesel engine was tested for 512 h (32 cycles of 16 h per day) to investigate longevity implications of fueling Thumba vegetable oil. Results of the study revealed that a very little damage was observed over the running surface of the cylinder liner, piston rings, valves, and valve seats...
February 4, 2019: Environmental Science and Pollution Research International
Dilraj S Grewal, Steve Charles, Barbara Parolini, Kazuaki Kadonosono, Tamer H Mahmoud
PURPOSE: To report the structural and functional outcomes of the autologous neurosensory retinal transplant for closure of refractory large macular holes. DESIGN: Multicenter retrospective consecutive case series PARTICIPANTS: Forty-one eyes of 41 patients (27 female and 14 male) with a full thickness macular hole refractory to prior vitrectomy with internal limiting membrane peel and tamponade. METHODS: All patients underwent pars-plana vitrectomy, autologous neurosensory retinal transplant with either gas, silicone oil tamponade, or short-term Perfluoro-n-octane heavy-liquid tamponade...
January 31, 2019: Ophthalmology
Gero L Hermsdorf, Sven A Szilagyi, Sebastian Rösch, Erik Schäffer
Mechanical vibrations in buildings are ubiquitous. Such vibrations limit the performance of sensitive instruments used, for example, for high-precision manufacturing, nanofabrication, metrology, medical systems, or microscopy. For improved precision, instruments and optical tables need to be isolated from mechanical vibrations. However, common active or passive vibration isolation systems often perform poorly when low-frequency vibration isolation is required or are expensive. Furthermore, a simple solution such as suspension from common bungee cords may require high ceilings...
January 2019: Review of Scientific Instruments
Gilad Rabina, Nur Azem, Dana Barequet, Adiel Barak, Anat Loewenstein, Shulamit Schwartz
PURPOSE: To evaluate the influence of silicone oil (SO) tamponade on retinal layers thickness and visual acuity in patients who underwent pars plana vitrectomy for rhegmatogenous retinal detachment. METHODS: This is a retrospective case series of consecutive patients who underwent pars plana vitrectomy for rhegmatogenous retinal detachment with SO tamponade. Visual acuity and central macular thickness were measured with SO and at least a month after SO removal (SOR)...
January 29, 2019: Retina
Andrew Walkden, Benjamin Griffin, Clarissa Cheng, Felipe Dhawahir-Scala
We report the case of a 32-year-old Afrocaribbean man with known stage 3 proliferative sickle-cell retinopathy who presented with a mixed picture of tractional and rhegmatogenous macula off detachment. He underwent left primary 25 g vitrectomy with silicone oil, delamination and endolaser photocoagulation under a general anaesthetic. He, however, presented 48 hours postoperatively with gross anterior segment ischaemia. His pain and ocular signs settled over the course of a few days following administration of supplemental oxygen, oral steroids, analgesia and intravenous hydration...
January 29, 2019: BMJ Case Reports
Kazuhisa Yamada, Hiroki Kaneko, Taichi Tsunekawa, Hideyuki Shimizu, Ayana Suzumura, Rina Namba, Jun Takeuchi, Keiko Kataoka, Kei Takayama, Makoto Inoue, Yasuki Ito, Hiroko Terasaki
PURPOSE: Based on the hypothesis that silicone oil (SO) with a higher refractive index than water induces unexpected vignetting effects during surgeries, we aimed to investigate the relationship between the volume of SO and light intensity using a surgical microscope. METHODS: Using a light-sensitive paper and model eye filled with varying volumes (0%, 50%, 62.5%, 75%, 87.5% and 100%) of SO, the light intensity of intraocular lens (IOL) with various refractive powers (0, 10 and 20 dioptres) illuminated by a surgical microscope was measured...
January 30, 2019: Acta Ophthalmologica
Paul S Boeke, Michael M Altaweel
No abstract text is available yet for this article.
January 23, 2019: Retina
Lingxiao Li, Tao Hu, Yanfei Yang, Junping Zhang
Porous monolithic materials have wide potential applications in various fields. However, it is still very challenging to obtain flexible silica monolithic materials that could withstand diverse mechanical deformations. Here, we report a simple method for the preparation of strong, compressible, bendable and stretchable (SCBS) silicone sponges. The SCBS silicone sponges were fabricated by solvent-controlled hydrolytic polycondensation of silanes in the presence of co-solvents of water, followed by being dried at ambient pressure at 60 °C...
January 16, 2019: Journal of Colloid and Interface Science
M Dheepak Sundar, Prakhyat Roop, Atul Kumar, Rohan Chawla, Nasiq Hasan
A patient, being a moderate myope with an axial length of 24.71 mm, presented to us with a fresh rhegmatogenous retinal detachment and marked peripheral chorioretinal degeneration. Difficulty in maneuvering with the standard 23 gauge vitrectomy cutter, inability to identify the break due to poor peripheral contrast, inadequate laser uptake, and an unusual large silicon oil fill (7.3 ml) were a few findings raising suspicion. Postoperative ocular ultrasonography showed an oblate eyeball with a relatively longer oblique axis (26...
February 2019: Indian Journal of Ophthalmology
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