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https://www.readbyqxmd.com/read/28350877/exposure-to-atheroma-relevant-7-oxysterols-causes-proteomic-alterations-in-cell-death-cellular-longevity-and-lipid-metabolism-in-thp-1-macrophages
#1
Liam J Ward, Stefan A Ljunggren, Helen Karlsson, Wei Li, Xi-Ming Yuan
The 7-oxysterols are recognised as strong enhancers of inflammatory processes in foamy macrophages. Atheroma-relevant 7-oxysterol mixtures induce a mixed type of cell death in macrophages, and trigger cellular oxidative stress responses, which mimic oxidative exposures observed in atherosclerotic lesions. However, the macrophage proteome has not previously been determined in the 7-oxysterol treated cell model. The aim of the present study was to determine the specific effects of an atheroma-relevant 7-oxysterol mixture on human macrophage proteome...
2017: PloS One
https://www.readbyqxmd.com/read/28350435/insight-into-a-fast-photo-tuning-azobenzene-switch-for-sustainably-tailoring-foam-stability
#2
Shaoyu Chen, Yanyan Zhang, Kunlin Chen, Yunjie Yin, Chaoxia Wang
A photo-responsive surfactant of 4-octoxy-4'-(trimethylaminoethoxy) azobenzene (OTAEAzo) has been synthesized for developing a fast photo-tuning foam switch based on its high sensitivity, reversibility and fatigue resistance of photo-isomerization capability. Ultraviolet (UV) light irradiation for 1 s enabled the conversion from trans isomer to cis configuration, while exposing to visible (Vis) light for 3 min induced cis-to-trans transformation, which maintains an excellent cycling stability for 20 cycles of photo-isomerization...
March 28, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28345923/geometry-and-topology-of-2d-dry-foams-computer-simulation-and-experimental-characterisation
#3
Mingming Tong, Katie Cole, Pablo R Brito-Parada, Stephen Johan Neethling, Jan J Cilliers
Pseudo-2D foams are commonly used in foam studies as it is experimentally easier to measure the bubble size distribution and other geometric and topological properties of these foams than it is for a 3D foam. Despite the widespread use of 2D foams in both simulation and experimental studies, many important geometric and topological relationships are still not well understood. Film size, for example, is a key parameter in the stability of bubbles and the overall structure of foams. The relationship between the size distribution of the films in a foam and that of the bubbles themselves is thus a key relationship in the modelling and simulation of unstable foams...
March 27, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28345643/thermal-resistance-variations-of-fly-ash-geopolymers-foaming-responses
#4
Heah Cheng-Yong, Liew Yun-Ming, Mohd Mustafa Al Bakri Abdullah, Kamarudin Hussin
This paper presents a comparative study of the characteristic of unfoamed and foamed geopolymers after exposure to elevated temperatures (200-800 °C). Unfoamed geopolymers were produced with Class F fly ash and sodium hydroxide and liquid sodium silicate. Porous geopolymers were prepared by foaming with hydrogen peroxide. Unfoamed geopolymers possessed excellent strength of 44.2 MPa and degraded 34% to 15 MPa in foamed geopolymers. The strength of unfoamed geopolymers decreased to 5 MPa with increasing temperature up to 800 °C...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28345315/the-role-of-macrophage-lipophagy-in-reverse-cholesterol-transport
#5
REVIEW
Se Jin Jeong, Mi Ni Lee, Goo Taeg Oh
Macrophage cholesterol efflux is a central step in reverse cholesterol transport, which helps to maintain cholesterol homeostasis and to reduce atherosclerosis. Lipophagy has recently been identified as a new step in cholesterol ester hydrolysis that regulates cholesterol efflux, since it mobilizes cholesterol from lipid droplets of macrophages via autophagy and lysosomes. In this review, we briefly discuss recent advances regarding the mechanisms of the cholesterol efflux pathway in macrophage foam cells, and present lipophagy as a therapeutic target in the treatment of atherosclerosis...
March 2017: Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28344079/nasal-foreign-bodies-in-children-in-a-pediatric-hospital-in-senegal-a-three-year-assessment
#6
P-E-J Regonne, M Ndiaye, A Sy, Y Diandy, A-D Diop, B-K Diallo
OBJECTIVES: Nasal foreign bodies (NFB) constitute a common domestic accident in children. The objectives of the present study were to report the particularities of NFBs in children presenting at a pediatric hospital in Senegal, and to describe our therapeutic attitude. MATERIAL AND METHODS: A retrospective descriptive study included all under-15 year-olds presenting with NFB in the ENT department of the National Children's Hospital Center of Diamniadio, Senegal, between January 1, 2013 and December 31, 2015...
March 23, 2017: European Annals of Otorhinolaryngology, Head and Neck Diseases
https://www.readbyqxmd.com/read/28343746/preliminary-development-of-an-advanced-modular-pressure-relief-cushion-testing-and-user-evaluation
#7
Tyler Freeto, Steven J Mitchell, Kath M Bogie
STUDY AIM: Effective pressure relief cushions are identified as a core assistive technology need by the World Health Organization Global Cooperation on Assistive Technology. High quality affordable wheelchair cushions could provide effective pressure relief for many individuals with limited access to advanced assistive technology. MATERIALS: Value driven engineering (VdE) principles were employed to develop a prototype modular cushion. Low cost dynamically responsive gel balls were arranged in a close packed array and seated in bilayer foam for containment and support...
March 20, 2017: Journal of Tissue Viability
https://www.readbyqxmd.com/read/28341071/comparative-study-of-2-oral-care-protocols-in-intensive-care-units
#8
Jérôme Ory, Evelyne Raybaud, Russell Chabanne, Bernard Cosserant, Jean Sébastien Faure, Renaud Guérin, Laure Calvet, Bruno Pereira, Charline Mourgues, Dominique Guelon, Ousmane Traore
BACKGROUND: The quality of oral care is important in limiting the emergence of ventilator-associated pneumonia (VAP) in intubated patients. Our main objective was to measure the quality improvement in oral care following the implementation of a new oral care protocol. We also monitored VAP rates. MATERIAL/METHODS: This was a cohort study of patients in 5 adult ICUs covering different specialties. During period 1, caregivers used a foam stick for oral care and during period 2 a stick and tooth brushing with aspiration...
March 1, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28338473/impact-absorption-properties-of-carbon-fiber-reinforced-bucky-sponges
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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: Arthroplast Today
https://www.readbyqxmd.com/read/28322580/macrophage-kdm6b-controls-the-pro-fibrotic-transcriptome-signature-of-foam-cells
#20
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
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