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https://www.readbyqxmd.com/read/28636078/microbial-lipopeptide-production-and-purification-bioprocesses-current-progress-and-future-challenges
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
https://www.readbyqxmd.com/read/28627579/correlation-analysis-of-protein-quality-characteristics-with-gluten-free-bread-properties
#7
S W Horstmann, M Foschia, E K Arendt
The interest in gluten-free cereal products has increased significantly over the last number of years and there is still a high demand for high quality products. This study aims to establish possible connections between protein properties and dough and bread quality which could advance the knowledge for gluten-free product development. The objective of the present study was to correlate protein properties with bread characteristics. Therefore, a wide range of tests (solubility, emulsifying, foaming, water hydration properties) was performed to characterize a range of food proteins (potato, pea, carob, lupin and soy)...
June 19, 2017: Food & Function
https://www.readbyqxmd.com/read/28626927/carbon-nanotube-multilayered-graphene-edge-plane-core-shell-hybrid-foams-for-ultrahigh-performance-electromagnetic-interference-shielding
#8
Qiang Song, Fang Ye, Xiaowei Yin, Wei Li, Hejun Li, Yongsheng Liu, Kezhi Li, Keyu Xie, Xuanhua Li, Qiangang Fu, Laifeng Cheng, Litong Zhang, Bingqing Wei
Materials with an ultralow density and ultrahigh electromagnetic-interference (EMI)-shielding performance are highly desirable in fields of aerospace, portable electronics, and so on. Theoretical work predicts that 3D carbon nanotube (CNT)/graphene hybrids are one of the most promising lightweight EMI shielding materials, owing to their unique nanostructures and extraordinary electronic properties. Herein, for the first time, a lightweight, flexible, and conductive CNT-multilayered graphene edge plane (MLGEP) core-shell hybrid foam is fabricated using chemical vapor deposition...
June 19, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28625597/structural-heart-disease-australia-shda
#9
EDITORIAL
Sharon Kay, David Celermajer, Michael Vallely
Structural Heart Disease Australia (SHDA) is a rapidly evolving multidisciplinary group of health care professionals which provides a forum focussed on understanding the rapidly advancing management of structural cardiac disease via Free Open Access Medical Education (FOAM).
May 4, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28623703/praseodymium-sorption-on-laminaria-digitata-algal-beads-and-foams
#10
Shengye Wang, Mohammed F Hamza, Thierry Vincent, Catherine Faur, Eric Guibal
Algal (Laminaria digitata) beads and algal foams have been prepared by a new synthesis mode and the sorbents were tested for praseodymium sorption in batch and fixed-bed like systems (recirculation or one-pass modes), respectively. Metal binding occurs through ion-exchange with Ca(II) ions used for ionotropic gelation of alginate contained in the algal biomass and eventually with protons. Sorption isotherms at pH 4 are described by the Langmuir and the Sips equations with maximum sorption capacities close to 110-120mgPrg(-1)...
June 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28622714/nico2s4-nimoo4-core-shell-heterostructure-nanotube-arrays-grown-on-ni-foam-as-a-binder-free-electrode-displayed-high-electrochemical-performance-with-high-capacity
#11
Yan Zhang, Jie Xu, Yayun Zheng, Yingjiu Zhang, Xing Hu, Tingting Xu
Core-shell-structured system has been proved as one of the best architecture for clean energy products owing to its inherited superiorities from both the core and the shell part, which can provide better conductivity and high surface area. Herein, a hierarchical core-shell NiCo2S4@NiMoO4 heterostructure nanotube array on Ni foam (NF) (NiCo2S4@NiMoO4/NF) has been successfully fabricated. Because of its novel heterostructure, the capacitive performance has been enhanced. A specific capacitance up to 2006 F g(-1) was obtained at a current density of 5 mA cm(-2), which was far higher than that of pristine NiCo2S4 nanotube arrays (about 1264 F g(-1))...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28622471/coacervate-of-polyacrylamide-and-cationic-gemini-surfactant-for-the-extraction-of-methyl-orange-from-aqueous-solution
#12
Weiwei Zhao, Yaxun Fan, Hua Wang, Yilin Wang
Coacervation in aqueous solution of the mixture of cationic ammonium surfactant hexamethylene-1,6-bis(dodecyldimethylammonium bromide) (12-6-12) and 10% hydrolyzed polyacrylamide (PAM) has been investigated. It was found that the 12-6-12/PAM mixture forms coacervate with a large network structure over a wide concentration range of surfactant and polyelectrolyte, and shows great efficiency in the extraction of methyl orange (MO) from water owing to the cooperation of hydrophobic, electrostatic and π-cation interactions...
June 16, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28621675/the-regulation-of-immune-cells-by-lactobacilli-a-potential-therapeutic-target-for-anti-atherosclerosis-therapy
#13
REVIEW
Ya-Hui Ding, Lin-Yan Qian, Jie Pang, Jing-Yang Lin, Qiang Xu, Li-Hong Wang, Dong-Sheng Huang, Hai Zou
Atherosclerosis is an inflammatory disease regulated by several immune cells including lymphocytes, macrophages and dendritic cells. Gut probiotic bacteria like Lactobacilli have been shown immunomodificatory effects in the progression of atherogenesis. Some Lactobacillus stains can upregulate the activity of regulatory T-lymphocytes, suppress T-lymphocyte helper (Th) cells Th1, Th17, alter the Th1/Th2 ratio, influence the subsets ratio of M1/M2 macrophages, inhibit foam cell formation by suppressing macrophage phagocytosis of oxidized low-density lipoprotein, block the activation of the immune system with dendritic cells, which are expected to suppress the atherosclerosis-related inflammation...
June 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28621041/extraordinarily-stretchable-all-carbon-collaborative-nanoarchitectures-for-epidermal-sensors
#14
Yichen Cai, Jie Shen, Ziyang Dai, Xiaoxian Zang, Qiuchun Dong, Guofeng Guan, Lain-Jong Li, Wei Huang, Xiaochen Dong
Multifunctional microelectronic components featuring large stretchability, high sensitivity, high signal-to-noise ratio (SNR), and broad sensing range have attracted a huge surge of interest with the fast developing epidermal electronic systems. Here, the epidermal sensors based on all-carbon collaborative percolation network are demonstrated, which consist 3D graphene foam and carbon nanotubes (CNTs) obtained by two-step chemical vapor deposition processes. The nanoscaled CNT networks largely enhance the stretchability and SNR of the 3D microarchitectural graphene foams, endowing the strain sensor with a gauge factor as high as 35, a wide reliable sensing range up to 85%, and excellent cyclic stability (>5000 cycles)...
June 16, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28618986/inflammatory-and-oxidative-stress-markers-as-indicator-of-atherogenesis-in-rats-antioxidants-as-preventive-pharmacological-methods
#15
Maria Del Carmen Baez, Mariana Tarán, María de La Paz Scribano, Ariel Balceda, Carla Buonanotte, Sergio Blencio, Ismael Fonseca, Monica Moya
The oxidative process in atherogenesis generated by proinflammatory induction and response to antioxidants vitamins in an experimental model were analyzed. METHODS: Male rats were used: (A)Control, (B)Control+vitamin E plus C, (C)Hyperfibrinogenemia and (D)Hyperfibrinogenemia+vitamins E plus C. Hyperfibrinogenemia induced by daily injection of adrenaline (0.1mg/day/rat) for 120 days. TREATMENT: 3.42 mg/kg of vitamin E plus 2.14 mg/kg of vitamin C, fifteen days after induction...
June 16, 2017: Anti-inflammatory & Anti-allergy Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/28616256/extremely-cost-effective-and-efficient-solar-vapor-generation-under-nonconcentrated-illumination-using-thermally-isolated-black-paper
#16
Zhejun Liu, Haomin Song, Dengxin Ji, Chenyu Li, Alec Cheney, Youhai Liu, Nan Zhang, Xie Zeng, Borui Chen, Jun Gao, Yuesheng Li, Xiang Liu, Diana Aga, Suhua Jiang, Zongfu Yu, Qiaoqiang Gan
Passive solar vapor generation represents a promising and environmentally benign method of water purification/desalination. However, conventional solar steam generation techniques usually rely on costly and cumbersome optical concentration systems and have relatively low efficiency due to bulk heating of the entire liquid volume. Here, an efficient strategy using extremely low-cost materials, i.e., carbon black (powder), hydrophilic porous paper, and expanded polystyrene foam is reported. Due to the excellent thermal insulation between the surface liquid and the bulk volume of the water and the suppressed radiative and convective losses from the absorber surface to the adjacent heated vapor, a record thermal efficiency of ≈88% is obtained under 1 sun without concentration, corresponding to the evaporation rate of 1...
February 27, 2017: Global Chall
https://www.readbyqxmd.com/read/28616235/exacerbation-of-alopecia-areata-a-possible-complication-of-sodium-tetradecyl-sulphate-foam-sclerotherapy-treatment-for-varicose-veins
#17
Mark S Whiteley, Victoria C Smith
A 40-year-old woman with a history of alopecia areata related to stress or hormonal changes was treated for bilateral primary symptomatic varicose veins (CEAP clinical score C2S) of pelvic origin, using a staged procedure. Her first procedure entailed pelvic vein embolisation of three pelvic veins using 14 coils and including foam sclerotherapy of the tributaries, using 3% sodium tetradecyl sulphate. Following this procedure, she had an exacerbation of alopecia areata with some moderate shedding of hair. Subsequently, she underwent endovenous laser ablation under local anaesthetic without incident...
2017: SAGE open medical case reports
https://www.readbyqxmd.com/read/28614945/selective-and-fast-adsorption-of-perfluorooctane-sulfonate-from-wastewater-by-magnetic-fluorinated-vermiculite
#18
Ziwen Du, Shubo Deng, Siyu Zhang, Wei Wang, Bin Wang, Jun Huang, Yujue Wang, Gang Yu, Baoshan Xing
A novel magnetic fluorinated adsorbent with selective and fast adsorption of perfluorooctane sulfonate (PFOS) was synthesized via a simple ball milling of Fe3O4 and vermiculite loaded with a cationic fluorinated surfactant. The loaded Fe3O4 nanoparticles increased the dispersibility of fluorinated vermiculite (F-VT) in water and allowed the magnetic separability. The nano-sized Fe3O4 was homogeneously embedded into the adsorbent surfaces, improving the hydrophilicity of F-VT external surface, and this hybrid adsorbent still kept the hydrophobic fluorinated interlayer structure...
June 15, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28612525/-the-role-of-dna-double-strain-damage-repairing-mechanisms-in-diabetic-atheroscolersis
#19
Li Zeng, Qun-Fang Ding, Ting-Yuan Xu, Fang Luo, Ning Ge, Shi-Tong Li
OBJECTIVES: To identify the role of DNA double-strain damage repairing pathway in the development of diabetics atherosclerosis. METHODS: Wistar male rats were randomly divided into three groups: control group (group A), balloon injury group (group B) and diabetes + balloon injury group (group C). Streptozotocin (STZ) was injected into rat abdomen to induce diabetes. After stabilizing high glucose, rats in group B and group C were both under aortic balloon injury technique and fed high lipid forage post-operatively...
March 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/28612495/graphdiyne-supported-nico2-s4-nanowires-a-highly-active-and-stable-3d-bifunctional-electrode-material
#20
Yurui Xue, Zicheng Zuo, Yongjun Li, Huibiao Liu, Yuliang Li
The oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting are major energy and chemical conversion efforts. Progress in electrocatalytic reactions have shown that the future is limitless in many fields. However, it is urgent to develop efficient electrocatalysts. Here, the first graphdiyne-supported efficient and bifunctional electrocatalyst is reported using 3D graphdiyne foam as scaffolds, and NiCo2 S4 nanowires as building blocks (NiCo2 S4 NW/GDF). NiCo2 S4 NW/GDF exhibits outstanding catalytic activity and stability toward both OER and HER, as well as overall water splitting in alkaline media...
June 14, 2017: Small
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