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silicon oil

Maurus Biedermann, Rafael Schum, Koni Grob
Catcherboard MB12® from Smurfit Kappa is a recycled paperboard incorporating activated carbon to reduce the release of contaminants into food. An approach is proposed to determine the efficacy of the activated carbon. Sorption into activated carbon increases the concentration ratio paperboard/food (distribution coefficient) and reduces the migration rate, i.e. prolongs the time for equilibration. Using silicone paper as food simulant, the concentration ratio was increased by a factor of at least 1000 compared to recycled paperboard without activated carbon, which is sufficient to meet the 1% criterion proposed for barriers...
August 14, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
Chien-Jen Lin, Kai-Ling Peng
We reported a rare case of sudden onset of severe but reversible suprachoroidal air that occurred at the moment of air-fluid exchange in 23-gauge vitrectomy. A 31-year-old male patient presented with a large break at 10-11 o'clock and high bullous, nearly total retinal detachment. He underwent first surgery with silicon oil injection at the end of the surgery. He was arranged to have a second surgery for silicon oil removal through pars plana vitrectomy which was performed smoothly at first. While switching to another mode of air-fluid exchange to clean the residual emulsified oil droplets, surgical view disappeared completely and was suddenly replaced with severe and total suprachoroidal air, which fortunately resolved within 3 days without any other severe complications...
2018: International Medical Case Reports Journal
Dorota Raczynska, Kamila Mitrosz, Krystyna Raczynska
PURPOSE: Pars plana vitrectomy (PPV) and silicone oil endotamponade has been used as a treatment in rhegmatogenous retinal detachment (RRD). Improvement in the modality of spectral-domain optical coherence tomography (SD-OCT) allows for the assessment of ganglion cell layer-inner plexiform layer (GCL-IPL) in the macular region. Information about the GCL-IPL status may be a response to the question why the visual recovery after PPV with silicone oil tamponade is incomplete. The aim of the study was to evaluate the impact of silicone oil on GCL-IPL and compare it with other endotamponade types such as Sulfur hexafluoride gas (SF6), Perfluoropropane gas (C3F8) used during PPV performed due to RRD...
August 12, 2018: Current Pharmaceutical Design
Chih-Ling Hu, Kai-Ling Peng
Purpose: We report a rare case of silicone oil droplets adhering to the posterior surface of an intraocular lens (IOL) after removal of silicone oil for a patient with retinal reattachment, who had a history of pseudophakic rhegmatogenous retinal detachment. Case report: A 45-year-old male with a history of cataract surgeries of both eyes developed pseudophakic retinal detachment in his left eye. He received surgeries of scleral buckle and standard 3-port pars plana vitrectomy with silicon oil tamponade...
2018: International Medical Case Reports Journal
Gudrun Weinmayr, Marie Pedersen, Massimo Stafoggia, Zorana J Andersen, Claudia Galassi, Jule Munkenast, Andrea Jaensch, Bente Oftedal, Norun H Krog, Geir Aamodt, Andrei Pyko, Göran Pershagen, Michal Korek, Ulf De Faire, Nancy L Pedersen, Claes-Göran Östenson, Debora Rizzuto, Mette Sørensen, Anne Tjønneland, Bas Bueno-de-Mesquita, Roel Vermeulen, Marloes Eeftens, Hans Concin, Alois Lang, Meng Wang, Ming-Yi Tsai, Fulvio Ricceri, Carlotta Sacerdote, Andrea Ranzi, Giulia Cesaroni, Francesco Forastiere, Kees de Hoogh, Rob Beelen, Paolo Vineis, Ingeborg Kooter, Ranjeet Sokhi, Bert Brunekreef, Gerard Hoek, Ole Raaschou-Nielsen, Gabriele Nagel
INTRODUCTION: Previous analysis from the large European multicentre ESCAPE study showed an association of ambient particulate matter <2.5 μm (PM2.5 ) air pollution exposure at residence with the incidence of gastric cancer. It is unclear which components of PM are most relevant for gastric and also upper aerodigestive tract (UADT) cancer and some of them may not be strongly correlated with PM mass. We evaluated the association between long-term exposure to elemental components of PM2...
August 7, 2018: Environment International
Irini Sotiri, Amanda Tajik, Yang Lai, Cathy T Zhang, Yevgen Kovalenko, Carine R Nemr, Haylea Ledoux, Jack Alvarenga, Edythe Johnson, Huseini S Patanwala, Jaakko V I Timonen, Yuhang Hu, Joanna Aizenberg, Caitlin Howell
The ability to control the properties of bio-inspired liquid-infused surfaces is of interest in a wide range of applications. Liquid layers created using oil-infused polydimethylsiloxane elastomers offer a potentially simple way of accomplishing this goal through the adjustment of parameters such as curing agent ratio and oil viscosity. In this work, the effect of tuning these compositional parameters on the properties of the infused polymer are investigated, including infusion dynamics, stiffness, longevity in the face of continuous liquid overlayer removal, and resistance to bacterial adhesion...
August 9, 2018: Biointerphases
Alessio Caciagli, Mykolas Zupkauskas, Aviad Levin, Tuomas P J Knowles, Clement Mugemana, Nico Bruns, Thomas O'Neill, William J Frith, Erika Eiser
Many industrial soft materials include oil-in-water (O/W) emulsions at the core of their formulations. By using tuneable interface stabilizing agents, such emulsions can self-assemble into complex structures. DNA has been used for decades as a thermoresponsive, highly specific binding agent between hard and, recently, soft colloids. Up until now, emulsion droplets functionalized with DNA had relatively low coating densities and were expensive to scale up. Here a general O/W DNA-coating method using functional non-ionic amphiphilic block copolymers, both diblock and triblock, is presented...
August 8, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
Mohit Dogra, Ramanuj Samanta, Pallavi Singh, Simar Rajan Singh, Priya Bajgai, Aman Sharma, Reema Bansal, Vishali Gupta, Mangat R Dogra, Ramandeep Singh
PURPOSE: To analyze the outcomes of surgical procedures on inciting eye of patients with Sympathetic ophthalmia (SO). METHODS: Retrospective study of patients with SO who underwent surgical procedures on inciting eyes between January 2000 and December 2015. Outcome measures included flare up of inflammation in either eye and change in visual acuity in the inciting eye. RESULTS: Four SO patients underwent surgeries in their inciting eyes after adequate control of inflammation...
August 6, 2018: Ocular Immunology and Inflammation
Ranit Mukherjee, Mohammad Habibi, Ziad T Rashed, Otacilio Berbert, Xiangke Shi, Jonathan B Boreyko
Porous surfaces impregnated with a liquid lubricant exhibit minimal contact angle hysteresis with immiscible test liquids, rendering them ideal as self-cleaning materials. Rather than roughening a solid substrate, an increasingly popular choice is to use an absorbent polymer as the "porous" material. However, to date the polymer choices have been limited to expensive silicone-based polymers or complex assemblies of polymer multilayers on functionalized surfaces. In this paper, we show that hydrocarbon-based polymer films such as polyethylene can be stably impregnated with chemically compatible vegetable oils, without requiring any surface treatment...
August 3, 2018: Scientific Reports
Kaidi Zhang, Lei Chao, Jia Zhou
One of the major hurdles in the development of biocompatible/biodegradable EWOD (Electrowetting-on-dielectric) devices is the biocompatibility of the dielectric and hydrophobic layers. In this study, we address this problem by using reactive ion etching (RIE) to prepare a super-hydrophobic film combining fluorinated cellulose triacetate (CTA) and poly (lactic-co-glycolic acid) (PLGA). The contact angle (CA) of water droplets on the proposed material is about 160°. X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) characterizations indicate that a slight increase in the surface roughness and the formation of CFx (C-F or CF₂) bonds are responsible for the super-hydrophobic nature of the film...
August 1, 2018: Materials
Naonori Masuda, Ryoko Nishikawa, Tetsuo Ueda, Nahoko Ogata
Purpose: Relapsing polychondritis is a rare multiorgan disease characterized by repeated episodes of inflammation and deterioration of cartilages. We report a case of relapsing polychondritis that presented with severe panuveitis. Observations: A 53-year-old man visited our hospital because of ocular pain in both eyes of 2 weeks' duration. His best-corrected visual acuity was 20/20 in both eyes but he had severe hyperemia of the conjunctiva bilaterally. Inflammation in the anterior segment and vitreous opacity had been getting worse in his right eye...
September 2018: American Journal of Ophthalmology Case Reports
Jianjun Zhang, Weidong Liu, Li'e Gao, Yiwen Zhang, Weijiang Tang
This paper proposes a novel underwater dexterous hand structure whose fingertip is equipped with underwater tactile force sensor (UTFS) array to realize the grasping sample location determination and force perception. The measurement structure, theoretical analysis, prototype development and experimental verification of the UTFS are purposefully studied in order to achieve accurate measurement under huge water pressure influence. The UTFS is designed as capsule shape type with differential pressure structure, and the external water pressure signal is separately transmitted to the silicon cup bottom which is considered to be an elastomer with four strain elements distribution through the upper and lower flexible contacts and the silicone oil filled in the upper and lower cavities of UTFS...
July 26, 2018: Sensors
Christina Stathopoulos, Alexandre Moulin, Marie-Claire Gaillard, Maja Beck-Popovic, Francesco Puccinelli, Francis L Munier
BACKGROUND/AIMS: To report conservative therapy in diffuse infiltrating retinoblastoma (DIR) and describe specific optic coherence tomography (OCT) features of the tumour. METHODS: Retrospective review of all DIR cases treated conservatively between 1998 and 2012. RESULTS: Three patients (three eyes) were included, cases 1 and 3 with previous enucleation of the contralateral eye and case 2 with unilateral retinoblastoma referred after prior pars plana vitrectomy with silicone oil...
July 26, 2018: British Journal of Ophthalmology
Matthew J Pagenkopp, Thomas G Mason
Using a fractionated silicone oil-in-water nanoemulsion (NEM), which has a high ratio of surface area to volume, we investigate surfactant partitioning between the bulk continuous phase and the adsorbed interfacial phase. By adjusting the droplet volume fraction of this fractionated NEM and using gravimetric and electrical conductivity methods, we measure bulk and surface concentrations of an ionic surfactant (sodium dodecyl sulfate, SDS), thereby obtaining a raw adsorption isotherm of SDS on the interfaces of the nanodroplets...
July 26, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
Ramesh Venkatesh, Naresh Kumar Yadav, Shivani Sinha, Ashwin Mohan
PURPOSE: To report a case of successful closure of macular hole after surgery in a patient with choroidal coloboma. METHODS: Interventional case report. CASE DESCRIPTION: A 17-year-old boy developed a full-thickness macular hole at the edge of an inferior choroidal coloboma in the right eye. Visual acuity in the right eye was 20/200. Surgical management with 25-G pars plana vitrectomy, internal limiting membrane peeling, and silicone oil tamponade was performed...
July 25, 2018: Retinal Cases & Brief Reports
Jinglin Cui, Hong Chen, Hang Lu, Fangtian Dong, Dongmei Wei, Yan Jiao, Steve Charles, Weikuan Gu, Lin Wang
Introduction: To compare the effect and safety of intravitreal conbercept (IVC), intravitreal ranibizumab (IVR), or intravitreal triamcinolone acetonide (IVTA) injection on 23-gauge (23-G) pars plana vitrectomy (PPV) for proliferative diabetic retinopathy (PDR). Methods: Fifty patients (60 eyes) of varying degrees of PDR were randomly grouped into 3 groups (1 : 1 : 1) ( n = 20 in each group). The 23-G PPV was performed with intravitreal conbercept or ranibizumab injection 3-7 days before surgery or intravitreal TA injection during surgery...
2018: Journal of Ophthalmology
Enver Mirza, Günhal Şatırtav, Refik Oltulu, Hürkan Kerimoğlu, Mehmet Kemal Gündüz
PURPOSE: To report changes in subfoveal choroidal thickness (SFCT) using spectral-domain optical coherence tomography following pars plana vitrectomy (PPV) with silicone oil (SiO) endotamponade injection and subsequent removal. METHODS: In this prospective study, 24 eyes of 24 patients with macula-off rhegmatogenous retinal detachment (RD) were included. These patients underwent PPV with SiO injection removal. SFCT measurements were taken 2 weeks and 3 months after PPV and SiO injection and 1 month after SiO removal...
July 24, 2018: International Ophthalmology
Anmol U Naik, V Jaya Prakash, Pradeep Susvar, K Lily Therese, C K Parameswari
A 60-year-old male presented with pain and decreased vision 3 weeks following uneventful intracapsular cataract extraction with anterior vitrectomy for subluxated cataract. A diagnosis of acute endophthalmitis was made based on clinical and ultrasound features. Patient improved only after undergoing pars plana vitrectomies twice and repeated intravitreal antibiotic-steroid injections. Vitreous aspirate revealed Gram-negative bacillus identified as Pseudomonas luteola on culture. Patient returned with a retinal detachment at first follow-up which was treated with vitrectomy, endolaser, and silicone oil tamponade...
August 2018: Indian Journal of Ophthalmology
Sumit Randhir Singh, Jay Chhablani
No abstract text is available yet for this article.
August 2018: Indian Journal of Ophthalmology
Elyse Jabbour, Georges Azar, Joelle Antoun, Hampig Raphael Kourie, Youssef Abdelmassih, Alexandre Jalkh
PURPOSE: To evaluate the risk factors for elevated intraocular pressure (IOP) after pars plana vitrectomy (PPV) with silicone oil injection (SOI). PROCEDURES: This prospective interventional study included 254 consecutive eyes receiving PPV with SOI. RESULTS: Elevated IOP developed in 48% of the eyes postoperatively. The onset of IOP elevation was early (≤1 week) in 61.5% of the eyes, intermediate (1-6 weeks) in 28.7%, and late (> 6 weeks) in 9...
July 23, 2018: Ophthalmologica. Journal International D'ophtalmologie
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