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https://www.readbyqxmd.com/read/28338473/impact-absorption-properties-of-carbon-fiber-reinforced-bucky-sponges
#1
Ramathasan Thevamaran, Deepika Saini, Mehmet Karakaya, Jingyi Zhu, Ramakrishna Podila, Apparao Rao, Chiara Daraio
We describe the super compressible and highly recoverable response of bucky sponges as they are struck by a heavy flat-punch striker. The bucky sponges studied here are structurally stable, self-assembled mixtures of multiwalled carbon nanotubes (MWCNTs) and carbon fibers (CFs). We engineered the microstructure of the sponges by controlling their porosity using different CF contents. Their mechanical properties and energy dissipation characteristics during impact loading are presented as a function of their composition...
March 24, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28336878/ag-nanoparticles-modified-3d-graphene-foam-for-binder-free-electrodes-of-electrochemical-sensors
#2
Tao Han, Jianli Jin, Congxu Wang, Youyi Sun, Yinghe Zhang, Yaqing Liu
Ag nanoparticles-modified 3D graphene foam was synthesized through a one-step in-situ approach and then directly applied as the electrode of an electrochemical sensor. The composite foam electrode exhibited electrocatalytic activity towards Hg(II) oxidation with high limit of detection and sensitivity of 0.11 μM and 8.0 μA/μM, respectively. Moreover, the composite foam electrode for the sensor exhibited high cycling stability, long-term durability and reproducibility. These results were attributed to the unique porous structure of the composite foam electrode, which enabled the surface of Ag nanoparticles modified reduced graphene oxide (Ag NPs modified rGO) foam to become highly accessible to the metal ion and provided more void volume for the reaction with metal ion...
February 16, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28336095/chlorinated-pesticides-and-natural-brominated-anisoles-in-air-at-three-northern-baltic-stations
#3
Terry F Bidleman, Hjalmar Laudon, Olle Nygren, Staffan Svanberg, Mats Tysklind
Polyurethane foam (PUF) disk passive samplers were deployed at one inland and two island locations in the Bothnian Bay region of the northern Baltic Sea. Uptake was linear over 81-147 d and a temperature range of -2.6 to 14.2 °C for organochlorine pesticides (OCPs) and current-use pesticides (CUPs) having log KOA ≥9 at ambient temperatures. Partial saturation of the PUF disks occurred for the more volatile OCPs hexachlorocyclohexanes (HCHs) and hexachlorobenzene (HCB), and for bromoanisoles (BAs), which are products of bromophenols released by natural and anthropogenic sources...
March 20, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28335346/a-facile-method-to-in-situ-synthesize-porous-ni%C3%A2-geo%C3%A2-nano-sheets-on-nickel-foam-as-advanced-anode-electrodes-for-li-ion-batteries
#4
Delong Ma, Xiaomin Shi, Anming Hu
A strategy for growth of porous Ni₂GeO₄ nanosheets on conductive nickel (Ni) foam with robust adhesion as a high-performance electrode for Li-ion batteries is proposed and realized, through a facile two-step method. It involves the low temperature hydro-thermal synthesis of bimetallic (Ni, Ge) hydroxide nanosheets precursor on Ni foam substrates and subsequent thermal transformation to porous Ni₂GeO₄ nanosheets. The as-prepared Ni₂GeO₄ nanosheets possess many interparticle mesopores with a size range from 5 to 15 nm...
November 19, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28333905/-the-inflammatory-processes-in-atherogenesis
#5
Natalia Cichoń, Dominika Lach, Angela Dziedzic, Michał Bijak, Joanna Saluk
Atherogenesis is the process of atherosclerotic plaque formation, leading to coronary artery heart disease. This process involves immune cells, mainly T and B cells, monocytes and macrophages. The process of atherogenesis is induced by inflammatory damage of endothelial cells. The characteristic construction features of the atherosclerotic plaque is a predisposing factor for acute coronary syndromes. The accumulation of inflammatory cells in the artery inner membrane enhances the local inflammatory process due to the secretion of reactive oxygen species, inflammatory cytokines and metalloproteinases, which accelerate the development of atherosclerotic lesions in the arteries...
March 21, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28332915/effects-of-sampling-interval-on-the-passive-air-sampling-of-atmospheric-pcbs-levels
#6
Ahmet Egemen Sakin, Fatma Esen, Yucel Tasdemir
In this study, we collected Polychlorinated biphenyls (PCBs) using passive air samplers (PASs), between February 4, 2013 and February 2, 2014, with the sampling periods ranging from 10 to 60 days. The samples were collected with PASs that contained polyurethane foam (PUF). With these samples, 87 PCB congeners were analyzed. Sampling coefficient (R) values for the four seasons were calculated using both the high volume air sampler (HVAS) and PAS samples collected with the same time interval. The average of the annual concentrations of 87 PCB congeners, calculated using the R values specific to this study, was 234 ± 175 pg/m(3)...
March 23, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28332812/hierarchical-nico2s4-nife-ldh-heterostructures-supported-on-nickel-foam-for-enhanced-overall-water-splitting-activity
#7
Jia Liu, Jinsong Wang, Bao Zhang, Yunjun Ruan, Lin Lv, Xiao Ji, Kui Xu, Ling Miao, Jianjun Jiang
Low cost and high efficient bifunctional electrocatalysts for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) are intensively investigated for overall water splitting. Herein, we combined experimental researches with first-principles calculations based on density functional theory (DFT) to engineer the NiCo2S4@NiFe LDH heterostructures interface for enhancing overall water splitting activity. The DFT calculations exhibit a strong interaction and charge transfer between NiCo2S4 and NiFe LDH, which change the interfacial electronic structure and surface reactivity...
March 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28330873/amp-activated-protein-kinase-%C3%AE-1-promotes-atherogenesis-by-increasing-monocyte-to-macrophage-differentiation
#8
Miao Zhang, Huaiping Zhu, Ye Ding, Zhaoyu Liu, Zhejun Cai, Ming-Hui Zou
Monocyte-to-macrophage differentiation, which can be initiated by physiological or atherogenic factors, is a pivotal process in atherogenesis, a disorder in which monocytes adhere to endothelial cells and subsequently migrate into the sub-endothelial spaces, where they differentiate into macrophages and macrophage-derived foam cells and cause atherosclerotic lesions. However, the monocyte-differentiation signaling pathways that are activated by atherogenic factors are poorly defined. Here we report that the AMP- activated protein kinase (AMPK) α1 in monocytes promotes atherosclerosis by increasing monocyte differentiation and survival...
March 22, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28328612/complications-after-treatment-of-head-and-neck-venous-malformations-with-sodium-tetradecyl-sulfate-foam
#9
Giacomo Colletti, Alberto Deganello, Alessandro Bardazzi, Raul Mattassi, Pietro Dalmonte, Luca Gazzabin, Francesco Stillo
PURPOSE: The aim of this study was to evaluate complications in patients with head and neck venous malformations (VMs) treated with foam sclerotherapy using sodium tetradecyl sulfate (STS). METHODS: The authors retrospectively evaluated the complications, pain. and degree of satisfaction in 69 consecutive patients affected by cervicofacial VM managed with STS using the Tessari method in a single institution. RESULTS: The average number of procedures for each patient was 2...
March 21, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28327524/reducing-risk-of-salmonellosis-through-egg-decontamination-processes
#10
REVIEW
Thilini Piushani Keerthirathne, Kirstin Ross, Howard Fallowfield, Harriet Whiley
Eggs have a high nutritional value and are an important ingredient in many food products. Worldwide foodborne illnesses, such as salmonellosis linked to the consumption of eggs and raw egg products, are a major public health concern. This review focuses on previous studies that have investigated the procedures for the production of microbiologically safe eggs. Studies exploring pasteurization and decontamination methods were investigated. Gamma irradiation, freeze drying, hot air, hot water, infra-red, atmospheric steam, microwave heating and radiofrequency heating are all different decontamination methods currently considered for the production of microbiologically safe eggs...
March 22, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28326428/impact-of-postoperative-compression-dressing-using-polyethylene-foam-pad-on-the-multimodal-protocol-for-swelling-control-following-total-knee-arthroplasty-a-randomized-controlled-trial
#11
Satomi Kayamori, Sachiyuki Tsukada, Masako Sato, Kenichi Komata, Yumiko Isida, Motohiro Wakui
BACKGROUND: The multimodal approach is commonly applied to improve knee swelling after total knee arthroplasty. Although the use of a knee compression pad may improve knee swelling, its impact in the multimodal protocol remains unclear. METHODS: A total of 57 knees were randomly assigned to one of 2 groups receiving treatment with either a compression dressing using a polyethylene foam pad designed to effectively compress the postoperative knee combined with an elastic bandage or a compression dressing with use of an elastic bandage only...
December 2016: Arthroplasty Today
https://www.readbyqxmd.com/read/28322580/macrophage-kdm6b-controls-the-pro-fibrotic-transcriptome-signature-of-foam-cells
#12
Annette E Neele, Koen Hm Prange, Marten A Hoeksema, Saskia van der Velden, Tina Lucas, Stefanie Dimmeler, Esther Lutgens, Jan Van den Bossche, Menno Pj de Winther
AIM: In order to identify regulators of foam cells, we studied the H3K27 demethylase Kdm6b (also known as Jmjd3), a known regulator of macrophages, in controlling the transcriptional profile of foam cells. MATERIALS & METHODS: Foam cells from Kdm6b-deleted or Kdm6b wild-type mice were isolated and used for RNA-sequencing analysis. RESULTS: Pathway analysis revealed that pro-fibrotic pathways were strongly suppressed in Kdm6b-deleted foam cells...
March 21, 2017: Epigenomics
https://www.readbyqxmd.com/read/28322493/trimetallic-oxyhydroxide-coralloids-for-efficient-oxygen-evolution-electrocatalysis
#13
Yecan Pi, Qi Shao, Pengtang Wang, Fan Lv, Shaojun Guo, Jun Guo, Xiaoqing Huang
Trimetallic oxyhydroxides are one of the most effective materials for oxygen evolution reaction (OER) catalysis, a key process for water splitting. Herein, we describe a facile wet-chemical method to directly grow a series of coralloid trimetallic oxyhydroxides on arbitrary substrates such as nickel foam (NF) and carbon nanotubes (CNTs). The amount of iron in these oxyhydroxide sponges on NF and CNTs was precisely controlled, revealing that the electrocatalytic activity of the WCoFe trimetallic oxyhydroxides depends on the Fe amount in a volcano-like fashion...
March 21, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28321823/cardiovascular-disease-and-resuscitated-septic-shock-lead-to-the-downregulation-of-the-h2s-producing-enzyme-cystathionine-%C3%AE-lyase-in-the-porcine-coronary-artery
#14
Tamara Merz, Tatjana Stenzel, Benedikt Nußbaum, Martin Wepler, Csaba Szabo, Rui Wang, Peter Radermacher, Oscar McCook
BACKGROUND: Downregulation of the hydrogen sulfide (H2S)-producing enzymes cystathionine-γ-lyase (CSE), cystathionine-β-synthase (CBS), and/or 3-mercaptopyruvate sulfurtransferase (3-MST) is associated with chronic cardiovascular pathologies. Nevertheless, equivocal data are available on both the expression and function of these enzymes in coronary arteries (CA). We recently reported that atherosclerotic pigs subjected to sepsis developed impaired cardiac function, which coincided with decreased myocardial CSE expression and increased nitrotyrosine formation...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28318949/wing-augmentation-reduces-femoral-head-cutting-out-of-dynamic-hip-screw
#15
Chih-Yu Chen, Shu-Wei Huang, Jui-Sheng Sun, Shin-Yiing Lin, Chih-Sheng Yu, Hsu-Pin Pan, Ping-Hung Lin, Fan-Chun Hsieh, Yang-Hwei Tsuang, Feng-Huei Lin, Rong-Sen Yang, Cheng-Kung Cheng
The dynamic hip screw (DHS) is commonly used in the treatment of femoral intertrochanteric fracture with high satisfactory results. However, post-operative failure does occur and result in poor prognosis. The most common failure is femoral head varus collapse, followed by lag screw cut-out through the femoral head. In this study, a novel-designed DHS with two supplemental horizontal blades was used to improve the fixation stability. In this study, nine convention DHS and 9 Orthopaedic Device Research Center (ODRC) DHSs were tested in this study...
March 17, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28318264/structure-of-polystyrene-sulfonate-surfactant-mixtures-at-air-water-interfaces-and-their-role-as-building-blocks-for-macroscopic-foam
#16
Felix Schulze-Zachau, Björn Braunschweig
Air/water interfaces were modified by oppositely charged poly(sodium 4-styrenesulfonate) (NaPSS) and hexadecyltrimethylammonium bromide (CTAB) polyelectrolyte/surfactant mixtures and were studied on a molecular level with vibrational sum-frequency generation (SFG), tensiometry, surface dilatational rheology and ellipsometry. In order to deduce structure property relations, our results on the interfacial molecular structure and lateral interactions of PSS(-)/CTA(+) complexes were compared to the stability and structure of macroscopic foam as well as to bulk properties...
March 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28317719/effect-of-a-multiple-freeze-thaw-process-on-structural-and-foaming-properties-of-individual-egg-white-proteins
#17
Xiang Duan, Junyi Li, Qinjun Zhang, Tong Zhao, Mei Li, Xueming Xu, Xuebo Liu
In this study, major albumen proteins (ovalbumin, ovomucoid, ovotransferrin, lysozyme and ovomucin) were singly subjected to a multiple freeze-thaw process, and the resulting changes in structural characteristics and foamability were investigated. Structural changes of proteins occurred during the process, regarding by sulfhydryl-disulfide interchange and exposure of hydrophobic groups. The differential scanning calorimetry and scanning electron microscopy showed that these albumen proteins underwent denaturation, dissociation and possibly aggregation...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28317374/flexible-and-thermostable-graphene-sic-nanowires-foam-composites-with-tunable-electromagnetic-wave-absorption-properties
#18
Meikang Han, Xiaowei Yin, Zexin Hou, Changqing Song, Xinliang Li, Litong Zhang, Laifei Cheng
Three-dimensional (3D) flexible foams consisting of reduced graphene oxides (rGO) and in-situ grown SiC nanowires (NWs) were prepared using freeze-drying and carbothermal reduction process. By means of incorporating SiC nanowires into rGO foams, both the thermostability and electromagnetic absorption of the composites were improved. It was demonstrated that rGO/SiC NWs foams were thermostable beyond ~630 °C (90% weight retention in air atmosphere). As expected, rGO/SiC NWs foams in the poly (dimethylsiloxane) matrix achieved effective absorption in the entire X-band (8...
March 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28316603/dose-dependent-induction-of-an-idiotypic-cascade-by-anti-glycosaminoglycan-monoclonal-antibody-in-apoe-mice-association-with-atheroprotection
#19
Roger Sarduy, Victor Brito, Adriana Castillo, Yosdel Soto, Tania Griñán, Sylvie Marleau, Ana María Vázquez
Atherosclerosis, the underlying pathology of most cardiovascular diseases, is triggered by the retention of apolipoprotein B (apoB)-containing lipoproteins in the arterial wall through electrostatic interactions with glycosaminoglycan (GAG) side chains of proteoglycans. Previously, we reported the antiatherogenic properties of the chimeric monoclonal antibody (mAb) chP3R99-LALA, which binds sulfated GAGs, inhibits low-density lipoprotein (LDL)-chondroitin sulfate (CS) association, and abrogates LDL oxidation and foam cell formation...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28316468/nutritional-quality-and-physicochemical-characteristics-of-defatted-bovine-liver-treated-by-supercritical-carbon-dioxide-and-organic-solvent
#20
Sung-Won Kang, Hye-Min Kim, M Shafiur Rahman, Ah-Na Kim, Han-Sul Yang, Sung-Gil Choi
Defatted bovine liver (DBL) is a potential source of protein and minerals. Supercritical carbon dioxide (SC-CO2) and a traditional organic solvent method were used to remove lipid from bovine liver, and the quality characteristics of a control bovine liver (CBL), bovine liver defatted by SC-CO2 (DBLSC-CO2) at different pressures, and bovine liver defatted by organic solvent (DBL-OS) were compared. The DBLSC-CO2 samples had significantly higher (p<0.05) protein, amino acid, carbohydrate, and fiber contents than CBL and DBL-OS...
2017: Korean Journal for Food Science of Animal Resources
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