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https://www.readbyqxmd.com/read/28807818/novel-concentrated-water-in-oil-emulsions-based-on-a-non-ionic-silicone-surfactant-appealing-application-properties-and-tuneable-viscoelasticity
#1
Lisa Binder, Johannes Jatschka, Dieter Baurecht, Michael Wirth, Claudia Valenta
Silicone excipients are non-irritating ingredients that are extensively used in topical formulations. In the present study, innovative water-in-oil emulsions with a high water content stabilised by a non-ionic silicone surfactant were developed. Effects of formulation composition on its properties and stability were investigated. It was possible to prepare highly stable emulsions with a water volume fraction of up to 80%. The emulsions exhibited desirable application properties such as non-sticky and cooling qualities...
August 11, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28745436/comparison-of-four-different-fuller-s-earth-formulations-in-skin-decontamination
#2
Annick Roul, Cong-Anh-Khanh Le, Marie-Paule Gustin, Emmanuel Clavaud, Bernard Verrier, Fabrice Pirot, Françoise Falson
Industrial accidents, wars and terrorist threats are potential sources of skin contamination by highly toxic chemical warfare agents and manufacturing compounds. We have compared the time-dependent adsorption capacity and decontamination efficiency of fuller's earth (FE) for four different formulations for the molecular tracer, 4-cyanophenol (4-CP), in vitro and ex vivo using water decontamination as standard. The adsorption capacity of FE was assessed in vitro for 4-CP aqueous solutions whereas decontamination efficiency was investigated ex vivo by tracking porcine skin 4-CP content using attenuated total reflectance Fourier transform infrared spectroscopy...
July 26, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28711641/tacrolimus-loaded-biocompatible-lecithin-based-microemulsions-with-improved-skin-penetration-structure-characterization-and-in-vitro-in-vivo-performances
#3
Vedrana Savić, Marija Todosijević, Tanja Ilić, Milica Lukić, Evgenia Mitsou, Vassiliki Papadimitriou, Spyridon Avramiotis, Bojan Marković, Nebojša Cekić, Snežana Savić
In order to improve skin penetration of tacrolimus we aimed to develop potentially non-irritant, lecithin-based microemulsions containing ethanol, isopropanol and/or propylene glycol as cosurfactants, varying caprylic/capric triglycerides and propylene glycol monocaprylate as oil phase. The influence of excipients on the size of microemulsion region in pseudo-ternary phase diagrams and their ability to form different types of microemulsions was evaluated. The comprehensive physicochemical characterization of microemulsions and the evaluation of their structure was performed, while the localization of tacrolimus in microemulsions was further investigated using electron paramagnetic resonance spectroscopy...
July 12, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28710659/comparison-of-the-effect-of-skin-preparation-pads-on-transepidermal-water-loss-in-ex-vivo-human-skin
#4
Hanan Osman-Ponchet, Alexandre Gaborit, Magali Kouidhi, Sandrine Anglars, Jeanne Marceau-Suissa, Orla Duffy-Roger, Jean-Michel Linget, Claire E Wilson
INTRODUCTION: Pre-treatment of the skin to remove scales and crusts prior to photodynamic therapy (PDT) is essential to enhance the uptake of topically applied methyl aminolevulinate (MAL) and to improve treatment efficacy. This study compared the effect of two different skin preparation pads on skin integrity in ex vivo human skin. METHODS: Ex vivo human skin samples from three donors were pre-treated in triplicates with PREPSTER™ (PR) skin preparation pad (6, 8, and 10 passages) or Ambu Unilect™ (A-UN) skin preparation pad (6, 8, and 10 passages)...
July 14, 2017: Dermatology and Therapy
https://www.readbyqxmd.com/read/28691240/superdurable-coating-fabricated-from-a-double-sided-tape-with-long-term-zero-bacterial-adhesion
#5
Wei Wang, Yang Lu, Hui Zhu, Zhiqiang Cao
There is no coating technology currently available to prevent the notorious biofilm formation issue. Here, a potential solution to fully address this tough issue is reported by developing a super-antifouling coating. The use of zwitterionic hydrogel (a double-sided tape) and commercial superglue is combined and a durable and ultrarobust antifouling zwitterionic (DURA-Z) coating is created that can be easily and universally applied on common substrates. Commercial superglue mostly for binding hydrophobic materials is used to strongly immobilize the superhydrophilic DURA-Z coating through interpenetration...
July 10, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28665438/crumpled-sheets-of-reduced-graphene-oxide-as-a-highly-sensitive-robust-and-versatile-strain-pressure-sensor
#6
Subhajit Kundu, Rammohan Sriramdas, Kazi Rafsanjani Amin, Aveek Bid, Rudra Pratap, Narayanan Ravishankar
Sensing of mechanical stimuli forms an important communication pathway between humans/environment and machines. The progress in such sensing technology has possible impacts on the functioning of automated systems, human machine interfacing, health-care monitoring, prosthetics and safety systems. The challenges in this field range from attaining high sensitivity to extreme robustness. In this article, sensing of complex mechanical stimuli with a patch of taped crumpled reduced graphene oxide (rGO) has been reported which can typically be assembled under household conditions...
July 13, 2017: Nanoscale
https://www.readbyqxmd.com/read/28629087/a-novel-candidate-for-wound-dressing-transparent-porous-maghemite-cellulose-nanocomposite-membranes-with-controlled-release-of-doxorubicin-from-a-simple-approach
#7
Hao Zhang, Xiaogang Luo, Hu Tang, Mingming Zheng, Fenghong Huang
The aim of this study is to develop transparent maghemite/cellulose nanocomposite membranes with high porosity, high adsorption capacity and controlled release of doxorubicin to be used as a candidate for wound dressing. The membranes were fabricated by a tape casting method through blending a homogeneous dispersion of citrate coated maghemite nanoparticles and cellulose in the NaOH/urea aqueous solution system. The prepared membranes were characterized by Light transmittance measurements, Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray Diffractometry (XRD), Differential scanning calorimetry (DSC), Tensile tests and Vibrating sample magnetometer (VSM)...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28602800/critical-quality-attributes-in-vitro-release-and-correlated-in-vitro-skin-permeation-in-vivo-tape-stripping-collective-data-for-demonstrating-therapeutic-non-equivalence-of-topical-semisolids-a-case-study-of-ready-to-use-vehicles
#8
Tanja Ilić, Ivana Pantelić, Dominique Lunter, Sanela Đorđević, Bojan Marković, Dragana Ranković, Rolf Daniels, Snežana Savić
This work aimed to prove the ability of "ready-to-use" topical vehicles based on alkyl polyglucoside-mixed emulsifier (with/without co-solvent modifications) to replace the conventionally used pharmacopoeial bases (e.g., non-ionic hydrophilic cream) in compounding practice. For this purpose, considering the regulatory efforts to establish alternative, scientifically valid methods for evaluating therapeutic equivalence of topical semisolids, we performed a comparative assessment of microstructure, selected critical quality attributes (CQAs) and in vitro/in vivo product performances, by utilizing aceclofenac as a model drug...
August 7, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28562478/neuroprotection-with-the-p53-inhibitor-pifithrin-%C3%AE-after-cardiac-arrest-in-a-rodent-model
#9
Michael Glas, Tamara Frick, Dirk Springe, Alessandro Putzu, Patrick Zuercher, Denis Grandgirard, Stephen L Leib, Stephan M Jakob, Jukka Takala, Matthias Haenggi
BACKGROUND: The small molecule pifithrin-μ reversibility inhibits the mitochondrial pathway of apoptosis. The neuronal effects of pifithrin-μ applied after cardiac arrest are unknown. We hypothesized that pifithrin-μ reduces neuronal damage in the most vulnerable brain region, the hippocampus, after cardiac arrest. METHODS: In two randomized controlled series we administered pifithrin-μ or control in 109 rats resuscitated after 8 or 10 minutes of cardiac arrest...
May 30, 2017: Shock
https://www.readbyqxmd.com/read/28537617/buoyancy-increase-and-drag-reduction-through-a-simple-superhydrophobic-coating
#10
Gi Byoung Hwang, Adnan Patir, Kristopher Page, Yao Lu, Elaine Allan, Ivan P Parkin
A superhydrophobic paint was fabricated using 1H,1H,2H,2H-perfluorooctyltriethoxysilane (PFOTES), TiO2 nanoparticles and ethanol. The paint has potential for aquatic application of a superhydrophobic coating as it induces increased buoyancy and drag reduction. Buoyance testing showed that the reduction of surface energy by superhydrophobic coating made it feasible that glass, a high density material, was supported by the surface tension of water. In a miniature boat sailing test, it was shown that the low energy surface treatment decreased the adhesion of water molecules to the surface of the boat resulting in a reduction of the drag force...
June 8, 2017: Nanoscale
https://www.readbyqxmd.com/read/28525773/acetone-facilitated-dna-sampling-from-electrical-tapes-improves-dna-recovery-and-enables-latent-fingerprints-development
#11
Ilan Feine, Moshe Shpitzen, Boris Geller, Eran Salmon, Tsach Peleg, Jonathan Roth, Ron Gafny
Electrical tapes (ETs) are a common component of improvised explosive devices (IEDs) used by terrorists or criminal organizations and represent a valuable forensic resource for DNA and latent fingerprints recovery. However, DNA recovery rates are typically low and usually below the minimal amount required for amplification. In addition, most DNA extraction methods are destructive and do not allow further latent fingerprints development. In the present study a cell culture based touch DNA model was used to demonstrate a two-step acetone-water DNA recovery protocol from ETs...
May 8, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28517733/comparison-of-the-measuring-efficacy-of-transepidermal-water-loss-of-a-reasonably-priced-portable-closed-chamber-system-device-h4500-with-that-of-rather-expensive-conventional-devices-such-as-tewameter-%C3%A2-and-vapometer-%C3%A2
#12
K Kikuchi, M Asano, H Tagami, M Kato, S Aiba
BACKGROUND/PURPOSE: Although measuring transepidermal water loss (TEWL) is important to assess the barrier function of the stratum corneum (SC), the commercially available instruments are rather expensive. Recently launched Model H4500 employs a closed-chamber system to measure TEWL and is more reasonably priced compared to devices currently in general use. METHODS: To check the reproducibility of the obtained data with H4500, we conducted measurements on the volar forearms of healthy volunteers and compared these data with those measured with Vapometer(®) and Tewameter(®) ...
May 18, 2017: Skin Research and Technology
https://www.readbyqxmd.com/read/28460995/three-dimensional-photography-for-quantitative-assessment-of-penile-volume-loss-deformities-in-peyronie-s-disease
#13
Ezra J Margolin, Carrie M Mlynarczyk, John P Mulhall, Doron S Stember, Peter J Stahl
BACKGROUND: Non-curvature penile deformities are prevalent and bothersome manifestations of Peyronie's disease (PD), but the quantitative metrics that are currently used to describe these deformities are inadequate and non-standardized, presenting a barrier to clinical research and patient care. AIM: To introduce erect penile volume (EPV) and percentage of erect penile volume loss (percent EPVL) as novel metrics that provide detailed quantitative information about non-curvature penile deformities and to study the feasibility and reliability of three-dimensional (3D) photography for measurement of quantitative penile parameters...
June 2017: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/28377647/salivary-proteins-a-barrier-on-enamel-demineralization-an-in-vitro-study
#14
Mithra N Hegde, Ankit R Sajnani
AIM: The aim of this study is to evaluate the protective effect of the salivary proteins on the demineralization of enamel. MATERIALS AND METHODS: Twenty freshly extracted human molar teeth were used in this study. Enamel samples (2 mm thickness) were prepared from the buccal and lingual surfaces of the teeth selected. An acid-resistant nail varnish was used to cover every aspect of the sample, except an area of 5 * 5 mm limited by an adhesive tape. After drying, the adhesive tape was removed, exhibiting a rectangular area on the enamel surface...
January 2017: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28324641/preparation-of-a-non-woven-poly-%C3%AE%C2%B5-caprolactone-fabric-with-partially-embedded-apatite-surface-for-bone-tissue-engineering-applications-by-partial-surface-melting-of-poly-%C3%AE%C2%B5-caprolactone-fibers
#15
In Ae Kim, Sang-Hoon Rhee
This article describes a novel method for the preparation of a biodegradable non-woven poly(ε-caprolactone) fabric with a partially embedded apatite surface designed for application as a scaffold material for bone tissue engineering. The non-woven poly(ε-caprolactone) fabric was generated by the electro-spinning technique and then apatite was coated in simulated body fluid after coating the PVA solution containing CaCl2 ·2H2 O. The apatite crystals were partially embedded or fully embedded into the thermoplastic poly(ε-caprolactone) fibers by controlling the degree of poly(ε-caprolactone) fiber surface melting in a convection oven...
March 21, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28283718/measuring-transdermal-glucose-levels-in-neonates-by-passive-diffusion-an-in-vitro-porcine-skin-model
#16
Cristina Tiangco, Abhay Andar, Juliana Quarterman, Xudong Ge, Fortunato Sevilla, Govind Rao, Audra Stinchcomb, Annette Bunge, Leah Tolosa
Current glucose monitoring techniques for neonates rely heavily on blood glucose monitors which require intermittent blood collection through skin-penetrating pricks on the heel or fingers. This procedure is painful and often not clinically conducive, which presents a need for a noninvasive method for monitoring glucose in neonates. Our motivation for this study was to develop an in vitro method for measuring passive diffusion of glucose in premature neonatal skin using a porcine skin model. Such a model will allow us to initially test new devices for noninvasive glucose monitoring without having to do in vivo testing of newborns...
March 10, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28278501/standardization-of-an-in-vitro-model-for-evaluating-the-bioavailability-of-topically-applied-compounds-on-damaged-skin-application-to-sunscreen-analysis
#17
Carine Jacques-Jamin, Corinne Jeanjean-Miquel, Anaïs Domergue, Sandrine Bessou-Touya, Hélène Duplan
BACKGROUND: Information is lacking on the dermal penetration of topically applied formulations on in vitro skin models, under conditions where the stratum corneum (SC) is damaged. Therefore, we have developed a standardized in vitro barrier-disrupted skin model using tape stripping. METHODS: Different tape stripping conditions were evaluated using histology, transepidermal water loss, infrared densitometry, and caffeine absorption. RESULTS: The effects of tape stripping were comparable using pig and human skin...
2017: Skin Pharmacology and Physiology
https://www.readbyqxmd.com/read/28277705/the-role-of-social-closeness-during-tape-stripping-to-facilitate-skin-barrier-recovery-preliminary-findings
#18
Hayley Robinson, Abhimati Ravikulan, Urs M Nater, Nadine Skoluda, Paul Jarrett, Elizabeth Broadbent
OBJECTIVE: Social support is known to reduce the negative effects of stress on health, but there is mixed evidence for the effects of social support on wound healing. This study aimed to investigate whether undergoing a task designed to promote social closeness with a fellow participant and being paired with that person during a tape-stripping procedure could reduce stress and improve skin barrier recovery compared to going through tape stripping alone. METHOD: Seventy-two healthy adults were randomized to either a social closeness condition where participants completed a relationship-building task and tape stripping in pairs or a control condition where they completed tape stripping alone...
March 9, 2017: Health Psychology: Official Journal of the Division of Health Psychology, American Psychological Association
https://www.readbyqxmd.com/read/28246113/disseminated-cysticercosis-incidentally-diagnosed-in-a-patient-of-fracture-shaft-of-femur
#19
Noora Saeed, Aaliya Ehsan, Shaista M Vasenwala
Cysticercosis is caused by the larval form of Taenia solium tape worm, cysticercus cellulose. The life cycle of T. solium consists of 2 host, the definite host is a man who harbours the adult forms of the worm in the intestine, while the intermediate host is the pig, where the larval form (cysticercus cellulose) is found in the skeletal muscle. Cysticercosis develops when human beings incidentally become the intermediate host and the eggs mature within their small intestine. The route of entry of the eggs into the human intestine may occur through autoinfection or by ingestion of contaminated food or water...
February 28, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28240727/under-pressure-the-utility-of-spacers-in-univalved-fiberglass-casts
#20
Kevin Kleis, John A Schlechter, Joshua D Doan, Christine L Farnsworth, Eric W Edmonds
BACKGROUND: Univalving fiberglass casts after fracture manipulation or extremity surgery reduces the risk of developing compartment syndrome (CS). Previous experiments have demonstrated that univalving decreases intracompartmental pressures (ICPs), but increases the risk for loss of fracture reduction due to altering the mechanical properties of the cast. The purpose of this study was to correlate cast valve width within a univalved cast model to decreasing ICP. METHODS: Saline bags (1 L) were covered with stockinette, Webril, and fiberglass tape then connected to an arterial pressure line monitor...
February 24, 2017: Journal of Pediatric Orthopedics
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