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https://www.readbyqxmd.com/read/28654271/microstructure-and-elastic-properties-of-colloidal-gel-foams
#1
Joseph T Muth, Jennifer A Lewis
Colloidal gel foams are composed of a continuous, attractive particle network that surrounds and interconnects dispersed bubbles. Here, we investigate their stability, morphology, and elasticity as a function of foaming intensity, surfactant concentration and hydrophobicity, pH, and colloid volume fraction. Upon optimizing these parameters, highly stable colloidal gel foams are created. Within this stability region, the specific interfacial area between the continuous (colloidal gel) and dispersed (bubble) phase can be varied over 2 orders of magnitude leading to a concomitant increase in storage modulus, which scales nearly linearly with specific interfacial area...
June 27, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28654107/in-situ-cathodic-activation-of-v-incorporated-nixsy-nanowires-for-enhanced-hydrogen-evolution
#2
Xiao Shang, Kai-Li Yan, Yi Rao, Bin Dong, Jing-Qi Chi, Yan-Ru Liu, Xiao Li, Yong-Ming Chai, Chen-Guang Liu
In situ cathodic activation (ISCA) of V-incorporated NixSy nanowires supported on nickel foam (VS/NixSy/NF) can be realized in an alkaline hydrogen evolution reaction (HER) process, which provides not only clearly enhanced activity but also ultrahigh stability for HER. The ISCA process is continuous linear sweep voltammetry (LSV) on VS/NixSy/NF as a cathodic electrode with gradually enhanced HER activity. The activated VS/NixSy/NF (A-VS/NixSy/NF) demonstrates enhanced HER activity with an overpotential of 125 mV to drive 10 mA cm(-2), which is much lower than that of other samples...
June 27, 2017: Nanoscale
https://www.readbyqxmd.com/read/28653788/mir-497-accelerates-oxidized-low-density-lipoprotein-induced-lipid-accumulation-in-macrophages-by-repressing-the-expression-of-apelin
#3
Junfeng Cui, Zhong Ren, Wenshuang Zou, Yanling Jiang
microRNAs (miRNAs) play important roles in the pathogenesis of atherosclerosis. A previous study has reported that miR-497 is elevated in advanced atherosclerotic lesions in an apoE-deficient (apoE-/-) mouse model. The purpose of this study is to test whether miR-497 can modulate macrophage foam cell formation, an initiating event in atherosclerosis. We found that miR-497 was upregulated in THP-1 macrophages after treatment with oxidized low-density lipoprotein (oxLDL). Enforced expression of miR-497 promoted lipid accumulation and decreased cholesterol efflux in oxLDL-exposed THP-1 macrophages...
June 27, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28652194/adipose-tissue-conditioned-media-support-macrophage-lipid-droplet-biogenesis-by-interfering-with-autophagic-flux
#4
Sapir Bechor, Dikla Nachmias, Natalie Elia, Yulia Haim, Maayan Vatarescu, Alicia Leikin-Frenkel, Martin Gericke, Tanya Tarnovsky, Guy Las, Assaf Rudich
Obesity promotes the biogenesis of adipose tissue (AT) foam cells (FC), which contribute to AT insulin resistance. Autophagy, an evolutionarily-conserved house-keeping process, was implicated in cellular lipid handling by either feeding and/or degrading lipid-droplets (LDs). We hypothesized that beyond phagocytosis of dead adipocytes, AT-FC biogenesis is supported by the AT microenvironment by regulating autophagy. Non-polarized ("M0") RAW264.7 macrophages exposed to AT conditioned media (AT-CM) exhibited a markedly enhanced LDs biogenesis rate compared to control cells (8...
June 23, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28651888/how-can-lifeguards-recover-better-a-cross-over-study-comparing-resting-running-and-foam-rolling
#5
Antón Kalén, Alexandra Pérez-Ferreirós, Roberto Barcala-Furelos, María Fernández-Méndez, Alexis Padrón-Cabo, Jose-Antonio Prieto, Andrés Ríos-Ave, Cristian Abelairas-Gómez
PURPOSE: The aim of this study is to compare the effectiveness of active recovery in form of running or foam rolling on clearing blood lactate compared to remain sitting after a water rescue. METHOD: A quasi experimental cross-over design was used to test the effectiveness of two active recovery methods: foam rolling (FR) and running (RR), compared with passive recovery (PR) on the blood lactate clearance after performing a water rescue. Twelve lifeguards from Marín (Pontevedra) completed the study...
June 15, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28649458/physico-chemical-rheological-and-antioxidant-properties-of-sweet-chestnut-castanea-sativa-mill-as-affected-by-pan-and-microwave-roasting
#6
Idrees Ahmed Wani, Humaira Hamid, Afshan Mumtaz Hamdani, Adil Gani, Bilal Ahmad Ashwar
Sweet chestnut (Castanea sativa Mill.) belongs to the family Fagaceae and sub family Castaneoideae. Bioactive components such as tannins are present in sweet chestnut in high proportion giving astringent bitter taste and reducing their palatability. Roasting reduces the anti-nutritional factors in chestnut. This study was conducted to compare the effects of pan and microwave roasting on physicochemical, functional, rheological and antioxidant properties of sweet chestnut. Antioxidant activity was determined using DPPH inhibition activity, reducing power, and total phenolic content...
July 2017: Journal of Advanced Research
https://www.readbyqxmd.com/read/28648655/outcomes-of-foam-sclerotherapy-plus-ligation-versus-foam-sclerotherapy-alone-for-venous-ulcers-in-lower-extremities
#7
Xin Li, Lin Fan, Shiyan Ren, Xianlun Li
BACKGROUND: Foam sclerotherapy (FS) is a safe and effective approach for managing patients with varicose veins and venous ulcers in lower extremities. But, recanalization of the ablated varicose veins and phlebitis are common postoperative complications that jeopardize its clinical effects. We hypothesize that ligation of the ablated varicose veins after FS will improve the outcomes of patients with varicose veins and venous ulcer. This study was aimed to evaluate the clinical efficacy of ligation after FS in comparison with FS alone for the management of patients with varicose veins and venous ulcers in lower extremities...
June 22, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28646516/tofacitinib-restores-the-inhibition-of-reverse-cholesterol-transport-induced-by-inflammation-understanding-the-lipid-paradox-associated-with-rheumatoid-arthritis
#8
S Pérez-Baos, J I Barrasa, P Gratal, A Larrañaga-Vera, I Prieto-Potin, G Herrero-Beaumont, R Largo
BACKGROUND AND PURPOSE: Patients with active rheumatoid arthritis (RA) have increased cardiovascular mortality, paradoxically associated with reduced circulating lipid levels. The Janus kinase (Jak) inhibitor tofacitinib ameliorates systemic and joint inflammation in RA with a concomitant increase in serum lipids. We analyzed the effect of tofacitinib on the lipid profile of hyperlipidemic rabbits with chronic arthritis (CA) and on the regulation of reverse cholesterol transport (RCT) during chronic inflammation...
June 23, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28645848/fe-and-experimental-study-on-how-the-cortex-material-properties-of-synthetic-femurs-affect-strain-levels
#9
Vitor M M Lopes, Maria A Neto, Ana M Amaro, Luis M Roseiro, M F Paulino
The primary aim of this work was to validate the "numerical" cortex material properties (transversely isotropic) of synthetic femurs and to evaluate how the strain level of the cancellous bone can be affected by the FE modeling of the material's behavior. Sensitivity analysis was performed to find out if the parameters of the cortex material affect global strain results more than the Polyurethane (PU) foam used to simulate cancellous bone. Standard 4th generation composite femurs were made with 0.32g/cm(3) solid PU foam to model healthy cancellous bone, while 0...
June 20, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28643855/support-surfaces-in-the-prevention-of-pressure-ulcers-in-surgical-patients-an-integrative-review
#10
Karoline Faria de Oliveira, Kleiton Gonçalves Nascimento, Adriana Cristina Nicolussi, Suzel Regina Ribeiro Chavaglia, Cleudmar Amaral de Araújo, Maria Helena Barbosa
AIM: To assess the scientific evidence about the types of support surfaces used in intraoperative surgical practice in the prevention of pressure ulcers due to surgical positioning. METHOD: This is an integrative literature review. The electronic databases Cochrane, PubMed, Web of Science, Scopus, Lilacs, and CINAHL were used. The descriptors surgical patients, support surfaces, perioperative care, patient positioning, and pressure ulcer were used in the search strategy...
June 23, 2017: International Journal of Nursing Practice
https://www.readbyqxmd.com/read/28641883/petroleum-oil-removal-by-immobilized-bacterial-cells-on-polyurethane-foam-under-different-temperature-conditions
#11
Mauricio J Alessandrello, María S Juárez Tomás, Enzo E Raimondo, Diana L Vullo, Marcela A Ferrero
In this work, a mixed biofilm composed by Pseudomonas monteilii P26 and Gordonia sp. H19 was formed using polyurethane foam (PUF) as immobilization support, for crude oil removal from artificial sea water. Fresh immobilized cells and immobilized cells that were stored at 4°C for two months before use were assessed. The oil removal assays were carried out at microcosm scale at 4, 15 and 30°C. A viability loss of P. monteilii P26 was observed after the storage. The highest removal value (75%) was obtained at 30°C after 7days using fresh immobilized cells on PUF...
June 19, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28639707/dressings-and-topical-agents-for-treating-pressure-ulcers
#12
REVIEW
Maggie J Westby, Jo C Dumville, Marta O Soares, Nikki Stubbs, Gill Norman
BACKGROUND: Pressure ulcers, also known as bedsores, decubitus ulcers and pressure injuries, are localised areas of injury to the skin or the underlying tissue, or both. Dressings are widely used to treat pressure ulcers and promote healing, and there are many options to choose from including alginate, hydrocolloid and protease-modulating dressings. Topical agents have also been used as alternatives to dressings in order to promote healing.A clear and current overview of all the evidence is required to facilitate decision-making regarding the use of dressings or topical agents for the treatment of pressure ulcers...
June 22, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28639017/removal-of-polyvinylamine-sulfonate-anthrapyridone-dye-by-application-of-heterogeneous-electro-fenton-process
#13
Bakhta Bouzayani, Jessica Meijide, Marta Pazos, Sourour Chaâbane Elaoud, Maria Angeles Sanroman
Diversity and rapidly multiplication of the pollutants incite as to improve the conventional treatments wastewater methods. One of the bottlenecks often faced is the presence into wastewater of organic pollutants with complex structures that requests the design of efficient processes. Thus, this work investigates the removal of polyvinylamine sulfonate anthrapyridone (PSA) dye which complex structure makes difficult its degradation by conventional technologies. For that, a heterogeneous oxidative process using pyrite as sustainable catalyst was designed...
June 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28638699/plantar-exteroceptive-inefficiency-causes-an-asynergic-use-of%C3%A2-plantar-and-visual-afferents-for-postural-control-best-means-of-remediation
#14
Arnaud Foisy, Zoï Kapoula
INTRODUCTION: Some subjects have difficulty to integrate both visual and plantar inputs, showing at the same time a "postural blindness" and a Plantar Exteroceptive Inefficiency (PEI). The former corresponds to a better stability eyes closed (EC) than eyes open (EO), while the latter is defined as a better stability on foam than on firm ground. Clinical studies reported that a manipulation of either plantar or visual input could affect the weight of both cues in postural control, suggesting interdependence in their use...
June 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28636078/microbial-lipopeptide-production-and-purification-bioprocesses-current-progress-and-future-challenges
#15
REVIEW
François Coutte, Didier Lecouturier, Krasimir Dimitrov, Jean-Sébastien Guez, Frank Delvigne, Pascal Dhulster, Philippe Jacques
Lipopeoptides are amphiphilic compounds combining interesting physicochemical properties and biological activities. Due to their high foaming capacity in aerated bioreactor, the development of scalable bioprocesses for their production is a major bottleneck. In addition, the genes involved in the biosynthesis of these lipopeptides are mainly regulated by the quorum sensing, a global regulatory mechanism depending on cell density and known to be activated in biofilms. Several approaches have thus been considered in literature taking into account two criteria, on one side, to favor, control or avoid foam formation and on the other side, to use planktonic or immobilized (biofilm) cells...
June 21, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28632017/correlation-of-iso-16840-2-2007-impact-damping-and-hysteresis-measures-for-a-sample-of-wheelchair-seating-cushions
#16
Susan J Hillman, James Hollington, Neil Crossan, Carmen Torres-Sánchez
Hysteresis and impact damping measures were made on 37 wheelchair seating cushions according to ISO 16840-2:2007 Wheelchair seating-Part 2: Determination of physical and mechanical characteristics of devices intended to manage tissue integrity-seat cushions. These measures were then correlated using Spearman and Pearson correlations to investigate the relationship between them. Correlations were also conducted on the subset of cushions comprising only those with planar foam construction. Correlation between the hysteresis measures (h250 and h500) and the mean number of rebounds greater in amplitude than 10% of the peak acceleration amplitude (R10%) were weak, as were the correlations between the hysteresis measures and the mean peak first rebound acceleration (aa)...
February 7, 2017: Assistive Technology: the Official Journal of RESNA
https://www.readbyqxmd.com/read/28631814/germination-assisted-enzymatic-hydrolysis-can-improve-the-quality-of-soybean-protein
#17
Hui Yang, Xin Li, Jinyan Gao, Ping Tong, Anshu Yang, Hongbing Chen
This study aimed to investigate the effects of combined germination and Alcalase hydrolysis on the quality of soybean protein. Protein profiles, water solubility, foaming and emulsifying properties, thixotropic properties, and in vitro protein digestibility (IVPD) were tested, the chemical score (CS), essential amino acid index (EAAI), and protein efficiency ratio (PER) of soybean protein were also defined. The combined treatment of germination and Alcalase hydrolysis remarkably improved the solubility, emulsification activity index, emulsion stability index, and foaming capacity of soybean protein...
June 20, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28631481/3d-graphene-ni-foam-as-an-advanced-electrode-for-high-performance-non-aqueous-redox-flow-batteries
#18
Kyubin Lee, Jungkuk Lee, Kyeong-Woo Kwon, Min-Sik Park, Jin-Ha Hwang, Ki Jae Kim
Electrodes composed of multi-layered graphene grown on a metal foam (GMF) were prepared by directly growing multi-layer graphene sheets on a three-dimensional (3D) Ni-foam substrate via a self-catalyzing chemical vapor deposition process. The multi-layer graphene sheets are successfully grown on the Ni-foam substrate surface, maintaining the unique 3D macroporous structure of the Ni foam. The potential use of GMF electrodes in non-aqueous redox flow batteries (RFBs) is carefully examined using [Co(bpy)3]+/2+ and [Fe(bpy)3]2+/3+ redox couples...
June 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28629091/polyurethane-silica-hybrid-foams-from-a-one-step-foaming-reaction-coupled-with-a-sol-gel-process-for-enhanced-wound-healing
#19
Eun-Ho Song, Seol-Ha Jeong, Ji-Ung Park, Sukwha Kim, Hyoun-Ee Kim, Juha Song
Polyurethane (PU)-based dressing foams have been widely used due to their excellent water absorption capability, optimal mechanical properties, and unequaled economic advantage. However, the low bioactivity and poor healing capability of PU limit the applications of PU dressings in complex wound healing cases. To resolve this problem, this study was carried out the hybridization of bioactive silica nanoparticles with PU through a one-step foaming reaction that is coupled with the sol-gel process. The hybridization with silica did not affect the intrinsically porous microstructure of PU foams with silica contents of up to 10wt% and where 5-60nm silica nanoparticles were well dispersed in the PU matrix, despite slight agglomerations...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28629071/hemostatic-kaolin-polyurethane-foam-composites-for-multifunctional-wound-dressing-applications
#20
Jeffrey G Lundin, Christopher L McGann, Grant C Daniels, Benjamin C Streifel, James H Wynne
There are numerous challenges associated with the acute care of traumatic limb injuries in forward military settings. A lack of immediate medical facilities necessitates that the wound dressing perform multiple tasks including exudate control, infection prevention, and physical protection of the wound for extended periods of time. Here, kaolin was incorporated into recently developed robust polyurethane (PU) hydrogel foams at 1-10wt% in an effort to impart hemostatic character. ATR-IR and gel fraction analysis demonstrated that the facile, one-pot synthesis of the PU hydrogel was unaffected by kaolin loading, as well as the use of a non-toxic catalyst, which significantly improved cytocompatibility of the materials...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
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