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https://www.readbyqxmd.com/read/29044857/direct-synthesis-of-polymer-nanotubes-via-aqueous-dispersion-polymerization-of-cyclodextrin-styrene-complex
#1
Xi Chen, Lei Liu, Meng Huo, Min Zeng, Liao Peng, Anchao Feng, Xiaosong Wang, Jinying Yuan
We report a one-step synthesis of nanotubes by RAFT dispersion polymerization of cyclodextrin/styrene (CD/St) complexes directly in water. The resulted amphiphilic PEG-b-PS diblock copolymers self-assemble in situ into nanoparticles with various morphologies. Spheres, worms, lamellae, and nanotubes were controllably obtained. Because of the complexation, the swelling degree of polystyrene (PS) blocks by free St is limited, resulting limited mobility of PS chains. Consequently, kinetically trapped lamellae and nanotubes were obtained instead of spherical vesicles...
October 17, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28989680/a-general-and-facile-chemical-avenue-for-the-controlled-and-extreme-regulation-of-water-wettability-in-air-and-oil-wettability-under-water
#2
Dibyangana Parbat, Sana Gaffar, Adil Majeed Rather, Aditi Gupta, Uttam Manna
The controlled modulation of both oil (under water) and water (in air) wettability is an emerging approach to develop several functional materials for various prospective applications including oil/water separation, anti-corrosive coatings, underwater robotics, protein crystallization, drug delivery, open microfluidics, water harvesting etc. Here, we report a 'reactive' and covalently cross-linked coating through a facile and robust Michael addition reaction, which is suitable for the controlled and extreme regulation of both water and oil wettability in air and under water respectively...
September 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28956148/rna-dna-co-analysis-from-bloodstains-on-aged-polyvinyl-alcohol-gloves-prepared-for-securing-evidence-from-the-hands-of-victims-of-fatal-gunshot-injuries
#3
Melanie Grabmüller, Cornelius Courts, Burkhard Madea, Tim Eichhorst, Christian Schyma
In contrast to cumulative techniques (e.g., tape-lift) for qualitative gunshot residues (GSR) analysis, topographic methods are commonly applied to preserve the integrity of evidence from a shooter's or victim's hand in cases of gun-related crimes. Topographic sampling techniques employing adhesive foils, latex, or the polyvinyl alcohol (PVAL) method enable unambiguous sampling of biological and non-biological trace material while preserving its spatial distribution and relation to each other. The PVAL method in particular allows for a topographically veridic and quantitative conservation of traces of GSR and biological stains that are embedded in the PVAL glove, because it completely removes these traces from the hand...
September 27, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28951120/evaluation-of-critical-parameters-for-in-vitro-skin-permeation-and-penetration-studies-using-animal-skin-models
#4
Fabíola Silva Garcia Praça, Wanessa Silva Garcia Medina, Josimar O Eloy, Raquel Petrilli, Patrícia Mazureki Campos, Andreia Ascenso, Maria Vitória L B Bentley
In vitro skin permeation/penetration studies may be affected by many sources of variation. Herein, we aimed to investigate the major critical procedures of in vitro skin delivery studies. These experiments were performed with model drugs according to official guidelines. The influence of skin source on penetration studies was studied as well as the use of a cryopreservation agent on skin freezing evaluated by transepidermal water loss, electrical resistance, permeation/penetration profiles and histological changes of the skin...
September 23, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28945059/tissue-dielectric-constant-and-circumference-measurement-in-the-follow-up-of-treatment-related-changes-in-lower-limb-lymphedema
#5
Alper Tugral, Tuomas Viren, Yesim Bakar
BACKGROUND: Lymphedema of lower limbs is a chronic condition that requires life-long management. Therapeutic effect of Complex Decongestive Physiotherapy (CDP) is most often followed by circumference measurements (CM). However, the CM measurements are not specific to interstitial tissue fluid and have problems in sensitivity and objectivity. The aim of present study was to evaluate the therapeutic effect of CDP with a new tissue water specific measurement technique, in patients with lower limb lymphedema (LLL)...
September 22, 2017: International Angiology: a Journal of the International Union of Angiology
https://www.readbyqxmd.com/read/28929736/substrate-versatile-approach-to-robust-antireflective-and-superhydrophobic-coatings-with-excellent-self-cleaning-property-in-varied-environments
#6
Tingting Ren, Junhui He
Robust antireflective and superhydrophobic coatings are highly desired in wide applications, such as optical devices, solar cell panels, architectural and automotive glasses, lab-on chip systems, and windows for electronic devices. Meanwhile, simple, low-cost, and substrate-versatile fabrication is also essential toward real applications of such coatings. Herein, we developed a substrate-versatile strategy to fabricate robust antireflective and superhydrophobic coatings with excellent self-cleaning property in varied environments, including air and oil and after oil contamination...
October 4, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28922322/-vectra-3d-imaging-for-quantitative-volumetric-analysis-of-the-upper-limb-a-feasibility-study-for-tracking-outcomes-of-lymphedema-treatment
#7
Mark J Landau, Jennifer S Kim, Daniel J Gould, Ketan M Patel
BACKGROUND: Secondary lymphedema of the upper limb is a common sequela following lymphadenectomy during oncologic surgery. The gold standard for evaluating treatment outcomes in upper limb lymphedema is limb volume measurement. However, current techniques lack sensitivity to localized changes. In this study, the Vectra 3D imaging system was utilized to accurately and precisely obtain volume measurements of the upper limb in patients with lymphedema. METHODS: A feasibility study was performed in 11 patients with lymphedema and 22 upper extremities; 24 arms were evaluated in total...
September 14, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28911799/effects-of-glucocorticoids-on-stratum-corneum-lipids-and-function-in-human-skin-a-detailed-lipidomic-analysis
#8
Mads A Røpke, Cristina Alonso, Sora Jung, Hanne Norsgaard, Claudia Richter, Maxim E Darvin, Thomas Litman, Annika Vogt, Jürgen Lademann, Ulrike Blume-Peytavi, Jan Kottner
BACKGROUND: Topical glucocorticoids (GCs) are known to induce atrophy of human skin including thinning of epidermal and dermal compartments by influencing keratinocyte proliferation and synthesis of extracellular matrix proteins. GCs are also known to reduce skin barrier integrity but little is known about the changes in lipid composition in human skin following topical administration of GCs. OBJECTIVE: This study investigated the effects of GCs on stratum corneum (SC) function and lipid profile of human skin in vivo...
August 26, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/28906449/facile-preparation-of-a-robust-and-durable-superhydrophobic-coating-using-biodegradable-lignin-coated-cellulose-nanocrystal-particles
#9
Jingda Huang, Siqun Wang, Shaoyi Lyu
It is a challenge for a superhydrophobic coating to overcome the poor robustness and the rough surface structure that is usually built using inorganic particles that are difficult to degrade. In this study, a robust superhydrophobic coating is facilely prepared by using commercial biodegradable lignin-coated cellulose nanocrystal (L-CNC) particles after hydrophobic modification to build rough surface structures, and by choosing two different adhesives (double-sided tape and quick-setting epoxy) to support adhesion between the L-CNC particles and the substrates...
September 14, 2017: Materials
https://www.readbyqxmd.com/read/28905712/evaluation-of-traditional-and-contemporary-methods-for-detecting-syphacia-obvelata-and-aspiculuris-tetraptera-in-laboratory-mice
#10
Philip M Gerwin, Rodolfo J Ricart Arbona, Elyn R Riedel, Michelle L Lepherd, Ken S Henderson, Neil S Lipman
There is no consensus regarding the best practice for detecting murine pinworm infections. Initially, we evaluated 7 fecal concentration methods by using feces containing Aspiculuris tetraptera (AT) eggs (n = 20 samples per method). Sodium nitrate flotation, sodium nitrate centrifugation, Sheather sugar centrifugation, and zinc sulfate centrifugation detected eggs in 100% of samples; zinc sulfate flotation and water sedimentation detected eggs in 90%. All had better detection rates than Sheather sugar flotation (50%)...
January 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28903743/a-socio-ecological-analysis-of-barriers-to-the-adoption-sustainablity-and-consistent-use-of-sanitation-facilities-in-rural-ethiopia
#11
Fikralem Alemu, Abera Kumie, Girmay Medhin, Teshome Gebre, Phoebe Godfrey
BACKGROUND: Despite evidence showing that access to and use of improved sanitation is associated with healthier households and communities, barriers influencing the adoption and sustainablity of sanitation facilities remain unclear. We conducted a qualitative case study to explore barriers influencing the adoption, sustainablity and consistent use of sanitation facilities in rural Ethiopia. METHODS: A qualitative study was conducted in the rural district of Becho, in central Ethiopia, from June to August 2016...
September 13, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28900448/scolicidal-agents-for-protoscolices-of-echinococcus-granulosus-hydatid-cyst-review-of-literature
#12
REVIEW
Seyedeh Maryam Sharafi, Raheleh Rafiei Sefiddashti, Behnam Sanei, Morteza Yousefi, Hossein Yousofi Darani
Hydatid cyst is the larval stage of dog tape worm Echinococcus granulosus. Protoscolices are parasite larvae that develop into adult worms in the final host intestine. During surgical treatment of human hydatidsosis spillage of live protoscolices is the major cause of hydatidosis recurrence. To prevent this problem scolicidal agent such as hypertonic salt are used to kill the protoscolices that may disseminate into the patient's tissues during surgery. However, they may have some unacceptable side effects. To find scolicidal agents with high efficacy, the effect of different compounds on protoscolices of hydatid cyst in vitro has been reviewed...
2017: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/28869692/the-1-6-7-12-tetraazaperylene-bridging-ligand-as-an-electron-reservoir-and-its-disulfonato-derivative-as-redox-mediator-in-an-enzyme-electrode-process
#13
Thomas Brietzke, Thomas Dietz, Alexandra Kelling, Uwe Schilde, Julianae Bois, Harald Kelm, Manuel Reh, Markus Schmitz, Thomas Körzdörfer, Silke Leimkühler, Ulla Wollenberger, Hans-Jörg Krüger, Hans-Jürgen Holdt
The homodinuclear ruthenium(II) complex [{Ru(l-N4 Me2 )}2 (μ-tape)](PF6 )4 {[1](PF6 )4 } (l-N4 Me2 =N,N'-dimethyl-2,11-diaza[3.3](2,6)-pyridinophane, tape=1,6,7,12-tetraazaperylene) can store one or two electrons in the energetically low-lying π* orbital of the bridging ligand tape. The corresponding singly and doubly reduced complexes [{Ru(l-N4 Me2 )}2 (μ-tape(.-) )](PF6 )3 {[2](PF6 )3 } and [{Ru(l-N4 Me2 )}2 (μ-tape(2-) )](PF6 )2 {[3](PF6 )2 }, respectively, were electrochemically generated, successfully isolated and fully characterized by single-crystal X-ray crystallography, spectroscopic methods and magnetic susceptibility measurements...
September 4, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28860679/single-nanowire-strain-sensors-fabricated-by-nanoskiving
#14
Liban Jibril, Julián Ramírez, Aliaksandr V Zaretski, Darren J Lipomi
This article describes the fabrication of single-nanowire strain sensors by thin sectioning of gold films with an ultramicrotome-i.e., "nanoskiving." The nanowire sensors are transferred to various substrates from the water bath on which they float after sectioning. The electrical response of these single nanowires to mechanical strain is investigated, with the lowest detectable strain determined to be 1.6 × 10(-5) with a repeatable response to strains as high as 7 × 10(-4). The sensors are shown to have an enhanced sensitivity with a gauge factor of 3...
August 15, 2017: Sensors and Actuators. A, Physical
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
#15
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...
November 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28745436/comparison-of-four-different-fuller-s-earth-formulations-in-skin-decontamination
#16
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
#17
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
#18
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
#19
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...
September 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
#20
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
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