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https://www.readbyqxmd.com/read/29234070/dielectric-barrier-discharge-based-mercury-free-plasma-uv-lamp-for-efficient-water-disinfection
#1
Ram Prakash, Afaque M Hossain, U N Pal, N Kumar, K Khairnar, M Krishna Mohan
A structurally simple dielectric barrier discharge based mercury-free plasma UV-light source has been developed for efficient water disinfection. The source comprises of a dielectric barrier discharge arrangement between two co-axial quartz tubes with an optimized gas gap. The outer electrode is an aluminium baked foil tape arranged in a helical form with optimized pitch, while the inner electrode is a hollow aluminium metallic rod, hermetically sealed. Strong bands peaking at wavelengths 172 nm and 253 nm, along with a weak band peaking at wavelength 265 nm have been simultaneously observed due to plasma radiation from the admixture of xenon and iodine gases...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29217624/applying-a-vernix-caseosa-based-formulation-accelerates-skin-barrier-repair-by-modulating-lipid-biosynthesis
#2
Walter A Boiten, Tineke Berkers, Samira Absalah, Jeroen van Smeden, Adriana P M Lavrijsen, Joke A Bouwstra
Restoring the lipid homeostasis of the stratum corneum (SC) is a common strategy to enhance the skin barrier function. Here, we used a ceramide containing vernix caseosa (VC) based formulation and were able to accelerate barrier recovery in healthy volunteers. The recovery was examined over 16 days by monitoring trans-epidermal water loss (TEWL) after barrier disruption by tape-stripping. Four skin sites were used to examine the effects of both treatment and barrier recovery. After 16 days, samples were harvested at these sites to examine the SC ceramide composition and the lipid organization...
December 7, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/29150968/effects-of-blue-light-on-inflammation-and-skin-barrier-recovery-following-acute-perturbation-pilot-study-results-in-healthy-human-subjects
#3
Denise Falcone, Natallia E Uzunbajakava, Frank van Abeelen, Gerrit Oversluizen, Malou Peppelman, Piet E J van Erp, Peter C M van de Kerkhof
BACKGROUND/PURPOSE: While growing evidence supports the therapeutic effect of 453 nm blue light in chronic inflammatory skin diseases, data on its effects on acutely-perturbed human skin are scarce. In this study we investigated the impact of 453 nm narrow-band LED light on healthy skin following acute perturbation. METHODS: Tape stripping and histamine iontophoresis were performed on the forearm of 22 healthy volunteers on two consecutive weeks. In one week, challenges were followed by irradiation for 30 minutes...
November 18, 2017: Photodermatology, Photoimmunology & Photomedicine
https://www.readbyqxmd.com/read/29141750/use-of-a-novel-portable-three-dimensional-scanner-to-measure-limb-volume-and-circumference-in-patients-with-filarial-lymphedema
#4
Channa Yahathugoda, Michael J Weiler, Ramakrishna Rao, Lalindi De Silva, J Brandon Dixon, Mirani V Weerasooriya, Gary J Weil, Philip J Budge
The World Health Organization's Global Program to Eliminate Lymphatic Filariasis (LF) has reduced LF transmission worldwide, but millions remain affected by filarial lymphedema. Tools for clinically monitoring lymphedema in developing nations are limited. We tested a novel, portable, infrared three-dimensional (3D) scanner against water displacement (WD) and tape measurement of limb circumference (TMLC) among patients with filarial leg lymphedema in Galle, Sri Lanka. Outcomes were accuracy and reproducibility of scanner measurements...
October 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29127706/peptide-strand-length-controls-the-energetics-of-self-assembly-and-morphology-of-%C3%AE-sheet-fibrils
#5
Robert P W Davies, Binbin Liu, Steven Maude, Lisa M Carrick, Irina Nyrkova, Tom C McLeish, Sarah A Harris
Self-assembling peptides can be used as versatile, natural, and multifunctional building blocks to produce a variety of well-defined nanostructures, materials and devices for applications in medicine and nanotechnology. Here, we concentrate on the 1D self-assembly of de novo designed Px-2 peptide β-strands into anti-parallel β-sheet tapes and higher order aggregates. We study six members of the Px-2 family, ranging from 3 amino acids (aa) to 13 aa in length, using a range of complementary experimental techniques, computer simulation and theoretical statistical mechanics...
November 11, 2017: Biopolymers
https://www.readbyqxmd.com/read/29119963/-what-physiotherapeutic-method-for-the-treatment-of-post-mastectomy-lymphedema-is-the-most-effective
#6
T I Grushina
We have undertaken the search for the publications of interest in the following databases: Scopus, Web of Science, MedLine, The Cochrane Library, CyberLeninka, and Russian science citation index. In addition, we evaluated the effectiveness of the physical agents and procedures having different mechanisms of action of the known factors responsible for the development of post-mastectomy lymphedema. Such agents and procedures include self-massage, manual lymphatic drainage, therapeutic physical exercises, compression bandaging, wearing elastic compression garments, Kinesio Tex taping, pneumatic compression, ultrasonic, electrostatic, extracorporeal shock wave therapy, electrical muscle stimulation, microcurrent and low-intensity laser therapy...
2017: Voprosy Kurortologii, Fizioterapii, i Lechebnoĭ Fizicheskoĭ Kultury
https://www.readbyqxmd.com/read/29115817/low-cost-chemical-responsive-adhesive-sensing-chips
#7
Weirui Tan, Liyuan Zhang, Wei Shen
Chemical-responsive adhesive sensing chip is a new low-cost analytical platform, which uses adhesive tape loaded with indicator reagents to detect or quantify the target analytes by directly sticking the tape to the samples of interest. The chemical-responsive adhesive sensing chips can be used with paper to analyse aqueous samples; they can also be used to detect and quantify solid, particulate and powder analytes. The colorimetric indicators become immediately visible as the contact between the functionalized adhesives and target samples was made...
November 8, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29111549/dynamic-covalent-bonding-triggered-supramolecular-gelation-derived-from-tetrahydroxy-bisurea-derivatives
#8
Suansuan Wang, Kaiqiang Liu, Sheng Gao, Jinqiang Wang, Ravi Kumar Marella, Yu Fang
A new class of bisurea derivatives bearing tetrahydroxy groups have been proven to be non-gelators in water and various organic solvents even under long-term sonication or efficient heating treatment. We found that it is possible to trigger physical gelation behaviour by constructing dynamic covalent bonding. The results show that formation of dynamic covalent bonding between the borate anion and ethanediol substituent in these bisurea derivatives brings about rapid physical gelation at ambient temperature in a mixture of DMSO and water...
November 22, 2017: Soft Matter
https://www.readbyqxmd.com/read/29110736/wireless-intraoral-tongue-control-of-an-assistive-robotic-arm-for-individuals-with-tetraplegia
#9
Lotte N S Andreasen Struijk, Line Lindhardt Egsgaard, Romulus Lontis, Michael Gaihede, Bo Bentsen
BACKGROUND: For an individual with tetraplegia assistive robotic arms provide a potentially invaluable opportunity for rehabilitation. However, there is a lack of available control methods to allow these individuals to fully control the assistive arms. METHODS: Here we show that it is possible for an individual with tetraplegia to use the tongue to fully control all 14 movements of an assistive robotic arm in a three dimensional space using a wireless intraoral control system, thus allowing for numerous activities of daily living...
November 6, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29101702/the-integrative-effect-of-periphyton-biofilm-and-tape-grass-vallisneria-natans-on-internal-loading-of-shallow-eutrophic-lakes
#10
Ying Yang, Wei Chen, Zhiyong Yi, Guofeng Pei
The response of periphyton biofilm and the submerged macrophyte tape grass (Vallisneria natans) to internal loading from eutrophic lake sediments were evaluated in microcosms. The sediments from the littoral zone and center of a lake were selected to carry out the microcosm experiment. To determine how the differences in the periphyton biofilm and V. natans growth alone or in combination, we measured changes in water quality, growth, and TP in the periphyton biofilm and V. natans in microcosms containing these sediments...
November 4, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29072475/emotion-in-the-wilds-of-nature-the-coherence-and-contagion-of-fear-during-threatening-group-based-outdoors-experiences
#11
Craig L Anderson, Maria Monroy, Dacher Keltner
Emotional expressions communicate information about the individual's internal state and evoke responses in others that enable coordinated action. The current work investigated the informative and evocative properties of fear vocalizations in a sample of youth from underserved communities and military veterans while white-water rafting. Video-taped footage of participants rafting through white-water rapids was coded for vocal and facial expressions of fear, amusement, pride, and awe, yielding more than 1,300 coded expressions, which were then related to measures of subjective emotion and cortisol response...
October 26, 2017: Emotion
https://www.readbyqxmd.com/read/29044857/direct-synthesis-of-polymer-nanotubes-via-aqueous-dispersion-polymerization-of-cyclodextrin-styrene-complex
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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