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https://www.readbyqxmd.com/read/28806591/immediate-mechanical-stability-of-threaded-and-porous-implant-systems
#1
Do-Gyoon Kim, Yong-Hoon Jeong, Hua-Hong Chien, Amanda M Agnew, Jin Whan Lee, Hai Bo Wen
BACKGROUND: Primary stability of a dental implant system is an essential factor to maintain its long-term success. Thus, the objective of this study was to examine whether primary stability is different between threaded and porous dental implant systems placed in artificial bone blocks and human cadaveric mandibular bone. MATERIALS AND METHODS: Forty-two threaded and 42 highly porous dental implants were placed in artificial polyurethane bone foams with 7 different thicknesses (3...
August 5, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28805560/glycation-of-matrix-proteins-in-the-artery-inhibits-migration-of-smooth-muscle-cells-from-the-media-to-the-intima
#2
A Kuzan, O Michel, A Gamian
Formation and growth of atherosclerotic plaques have serious clinical consequences. One mechanism that occurs during atherogenesis is migration of smooth muscle cells from the middle layer of the artery to the intima, where they proliferate and are transformed into foam cells. This degenerative process is accompanied by glycation, by which proteins are modified and change the biomechanical and biochemical properties. The aim of the study was to determine whether glycation of collagen and elastin building the walls of blood vessels alters the adhesion and rate of myocyte migration...
2017: Folia Biologica (Praha)
https://www.readbyqxmd.com/read/28803746/air-bubbles-and-hemolysis-of-blood-samples-during-transport-by-pneumatic-tube-systems
#3
Garrett R Mullins, David E Bruns
BACKGROUND: Transport of blood samples through pneumatic tube systems (PTSs) generates air bubbles in transported blood samples and, with increasing duration of transport, the appearance of hemolysis. We investigated the role of air-bubble formation in PTS-induced hemolysis. METHODS: Air was introduced into blood samples for 0, 1, 3 or 5min to form air bubbles. Hemolysis in the blood was assessed by (H)-index, lactate dehydrogenase (LD) and potassium in plasma. In an effort to prevent PTS-induced hemolysis, blood sample tubes were completely filled, to prevent air bubble formation, and compared with partially filled samples after PTS transport...
August 10, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28803627/bubble-bubble-interactions-in-a-2d-foam-close-to-the-wet-limit
#4
REVIEW
D Weaire, R Höhler, S Hutzler
Following the general approach of Morse and Witten for the deformation of a bubble in contact with neighbouring bubbles, we develop a model for contacting bubbles in two dimensions which can be solved analytically. The force-displacement relations are derived by elementary methods; unlike the case of 3d, no logarithmic factors arise in two dimensions. We also discuss the case of a uniform compression of a symmetric foam structure; the (osmotic) compressibility depends on the number of contacts, as was shown in earlier work by Lacasse et al...
July 13, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28803476/rationally-turning-the-interface-activity-of-mesoporous-silicas-for-preparing-pickering-foam-and-dry-water
#5
Xia Rong, Hengquan Yang, Ning Zhao
We develop a novel protocol to prepare smart, gas/water interface-active, mesoporous silica particles. This protocol involves modification of highly mesoporous silicas with a mixture of hydrophobic octyl organosilane and hydrophilic triamine organosilane. Their structure and compositions are characterized by transmission electron microscopy (TEM), N2 sorption, solid state NMR, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectra (FT-IR), Thermogravimetric analysis (TGA) and elemental analysis...
August 13, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28803337/production-of-rhamnolipids-by-semi-solid-state-fermentation-with-pseudomonas-aeruginosa-rg18-for-heavy-metal-desorption
#6
Jianrong Wu, Jingbo Zhang, Panpan Wang, Li Zhu, Minjie Gao, Zhiyong Zheng, Xiaobei Zhan
Foaming problem and cost of substrate limit the commercial application of rhamnolipids, a potential biosurfactant produced by Pseudomonas aeruginosa. We explored the production of rhamnolipids by a semi-solid-state (SSS) fermentation strategy with glycerol as carbon source and rapeseed/wheat bran as matrix, along with the capacity of the produced rhamnolipids to solubilize lead and cadmium in aqueous solution. Structural analysis by MALDI-TOF MS indicated the increased proportion of mono-rhamnolipids from SSS fermentation...
August 12, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28802141/adsorption-of-the-herbicides-diquat-and-difenzoquat-on-polyurethane-foam-kinetic-equilibrium-and-computational-studies
#7
Jonas O Vinhal, Kassem K Nege, Mateus R Lage, José Walkimar de M Carneiro, Claudio F Lima, Ricardo J Cassella
This work reports a study about the adsorption of the herbicides diquat and difenzoquat from aqueous medium employing polyurethane foam (PUF) as the adsorbent and sodium dodecylsulfate (SDS) as the counter ion. The adsorption efficiency was shown to be dependent on the concentration of SDS in solution, since the formation of an ion-associate between cationic herbicides (diquat and difenzoquat) and anionic dodecylsulfate is a fundamental step of the process. A computational study was carried out to identify the possible structure of the ion-associates that are formed in solution...
August 9, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28800519/emerging-poly-and-perfluoroalkyl-substances-in-the-aquatic-environment-a-review-of-current-literature
#8
REVIEW
Feng Xiao
Poly- and perfluoroalkyl substances (PFASs) comprise a group of synthetic organic surfactants with a wide range of industrial and commercial applications. A few PFASs such as perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) are now known to be ubiquitously present in the aquatic environment. They have become a global concern because of the toxicity and bioaccumulative properties. With the increasing availability of high-resolution mass spectrometers, many novel PFASs have been identified. Studies published between 2009 and 2017 have discovered 455 new PFASs (including nine fully and 446 partially fluorinated compounds), 45%, 29%, 17%, and 8% of which are anions, zwitterions, cations, and neutrals, respectively...
July 15, 2017: Water Research
https://www.readbyqxmd.com/read/28800098/porous-graphene-oxide-prepared-on-nickel-foam-by-electrophoretic-deposition-and-thermal-reduction-as-high-performance-supercapacitor-electrodes
#9
Yunhe Xu, Jun Li, Wenxin Huang
A simple electrophoretic deposition method was developed to prepare graphene oxide (GO) films on the frameworks of nickel foam without any conductive agents and polymer binders. Then, GO was transformed into thermally-reduced graphene oxide (RGO) at an appropriate temperature. The effects of deposition voltage and thermal reduction temperature on the electrochemical properties of RGO were investigated by cyclic voltammetry (CV) and galvanostatic charge/discharge. The appropriate combination of deposition voltage and thermal reduction temperature was established...
August 11, 2017: Materials
https://www.readbyqxmd.com/read/28799777/functional-and-therapeutic-potential-of-inulin-a-comprehensive-review
#10
Waqas Ahmed, Summer Rashid
Inulin as a heterogeneous blend of fructose polymers is diversely found in nature primarily as storage carbohydrates in plants. Besides, inulin is believed to induce certain techno-functional and associated properties in food systems. Inulin owing to its foam forming ability has been successfully used as fat replacer in quite a wide range of products as dairy and baked products. Furthermore, it is known to impart certain nutritional and therapeutic benefits that extend apart to improve health and reduce the risk of many lifestyle related diseases...
August 11, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/28799749/closed-pore-structured-nico2o4-coated-nickel-foam-for-stable-and-effective-oil-water-separation
#11
Yan Li, Xi Zheng, Zhanheng Yan, Xiaofang Zhang, Dongliang Tian, Jianmin Ma, Lei Jiang
To solve the serious problem caused by oily wastewater pollution, unique interface design, for example, membranes with superwetting properties such as superhydrophobicity/superoleophilicity and superhydrophilicity/underwater superoleophobicity, provides a good way to achieve oil/water separation. Here, inspired by the liquid storage property of the honeycomb structure, we propose a strategy to fabricate NiCo2O4-coated nickel foams for stable and efficient oil/water separation. NiCo2O4 with a closed pore structure was formed by assembling nanoflakes with a micro/nanoscale hierarchical structure...
August 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28799671/hydrophobic-flexible-and-lightweight-mxene-foams-for-high-performance-electromagnetic-interference-shielding
#12
Ji Liu, Hao-Bin Zhang, Renhui Sun, Yafeng Liu, Zhangshuo Liu, Aiguo Zhou, Zhong-Zhen Yu
Ultrathin, lightweight, and flexible electromagnetic-interference (EMI) shielding materials are urgently required to manage increasingly serious radiation pollution. 2D transition-metal carbides (MXenes) are considered promising alternatives to graphene for providing excellent EMI-shielding performance due to their outstanding metallic electrical conductivity. However, the hydrophilicity of MXene films may affect their stability and reliability when applied in moist or wet environments. Herein, for the first time, an efficient and facile approach is reported to fabricate freestanding, flexible, and hydrophobic MXene foam with reasonable strength by assembling MXene sheets into films followed by a hydrazine-induced foaming process...
August 11, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28798334/nitrogen-doped-carbon-paper-with-3d-porous-structure-as-a-flexible-free-standing-anode-for-lithium-ion-batteries
#13
Hua Zhang, Juntan Yang, Haoqing Hou, Shuiliang Chen, Haimin Yao
In this paper, a novel nitrogen-doped carbon paper (NCP) with both highly dense three-dimensional cellular structure and excellent bending flexibility is fabricated by pyrolyzing a melamine foam under compression. When serving as a free-standing anode for lithium-ion batteries, the NCP electrode delivers a reversible capacity up to 329.8 mA h g(-1) after 200 cycles at 0.5 A g(-1) (1.34 C) and 126.5 mA h g(-1) after 500 cycles at 8.0 A g(-1) (21.5 C). Such electrochemical performance is much higher than those of the counterparts prepared by pyrolysis without compression and can be mainly attributed to (a) the 3D highly dense interconnected carbon network with numerous junctions which can facilitate the efficient electron transfer and provide short transportation paths for lithium ions; and (b) the excellent mechanical flexibility and self-standing capability which exempt the use of binder, conductive additive and current collector...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28797964/enhancing-biodegradation-of-c16-alkyl-quaternary-ammonium-compounds-using-an-oxygen-based-membrane-biofilm-reactor
#14
YenJung Sean Lai, Aura Ontiveros-Valencia, Zehra Esra Ilhan, Yun Zhou, Evelyn Miranda, Juan Maldonado, Rosa Krajmalnik-Brown, Bruce E Rittmann
Quaternary ammonium compounds (QACs) (e.g., hexadecyltrimethyl-ammonium bromide, CTAB) are emerging contaminants with widespread use as surfactants and disinfectants. Because the initial step of QAC biodegradation is mono-oxygenation, QAC degraders require O2, but normal aeration leads to serious foaming. Here, we developed and tested an oxygen-based membrane biofilm reactor (O2-MBfR) that delivers O2 by diffusion through the walls of hollow-membranes to a biofilm accumulating on the outer surface of membranes...
July 2, 2017: Water Research
https://www.readbyqxmd.com/read/28797817/biodegradable-poly-lactic-acid-cellulose-nanocrystals-cncs-composite-microcellular-foam-effect-of-nanofillers-on-foam-cellular-morphology-thermal-and-wettability-behavior
#15
Shasanka Sekhar Borkotoky, Prodyut Dhar, Vimal Katiyar
This article addresses the elegant and green approach for fabrication of bio-based poly (lactic acid) (PLA)/cellulose nanocrystal (CNCs) bionanocomposite foam (PLA/CNC) with cellular morphology and hydrophobic surface behavior. Highly porous (porosity >80%) structure is obtained with interconnected pores and the effect of CNCs in the cell density (Nf) and cell size of foams are thoroughly investigated by morphological analysis. The thermo-mechanical investigations are performed for the foam samples and almost ∼1...
August 7, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28796913/patients-with-psoriasis-have-different-preferences-for-topical-therapy-highlighting-the-importance-of-individualized-treatment-approaches-randomized-phase-iiib-pso-insightful-study
#16
C-H Hong, K A Papp, K W Lophaven, P Skallerup, S Philipp
BACKGROUND: Poor adherence to topical therapy in psoriasis remains an issue; it is associated with poor clinical outcomes, reduced quality of life, and increased costs. Treatment-related factors leading to poor adherence include lack of efficacy, excessive time applying medication, and poor cosmetic characteristics (e.g. slow absorption, greasiness). OBJECTIVE: To assess the topical treatment attributes that influence patient preference for fixed combination calcipotriol 50 μg/g (Cal) and betamethasone 0...
August 10, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28795786/necroulcerative-hemorrhagic-gastritis-in-a-cat-secondary-to-the-administration-of-3-hydrogen-peroxide-as-an-emetic-agent
#17
Teresa D Obr, Joanna K Fry, Justine A Lee, Heidi A Hottinger
OBJECTIVE: To describe a case of necroulcerative gastritis in a cat secondary to administration of 3% hydrogen peroxide as an emetic agent. CASE SUMMARY: A 10-year-old neutered male domestic shorthair was evaluated for hematemesis less than 24 hours following ingestion of a piece of foam. The pet owner had administered 2 doses of 0.5-1.0 tablespoons (7.5-15 mL) of 3% hydrogen peroxide in an attempt to induce emesis at home; emesis was achieved and produced the foam foreign body...
August 10, 2017: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/28794930/evaluation-of-model-parameters-for-growth-tannic-acid-utilization-and-tannase-production-in-bacillus-gottheilii-m2s2-using-polyurethane-foam-blocks-as-support
#18
Subbalaxmi Selvaraj, Ramachandra Murty Vytla
Production of tannase from B. gottheilii M2S2 was studied under solid-state fermentation with an optimized medium consisting of polyurethane foam matrix of dimension 40 × 40 × 5 mm, impregnated with a liquid medium comprising (w/v): 4% tannic acid; 2% NH4NO3; 0.1% KH2PO4; 0.2% MgSO4; 0.1% NaCl and 0.05% CaCl2·2H2O in distilled water, having a pH of 4.7. Maximum tannase production of 56.87 U/L was obtained after 32 h of fermentation at 32 °C in static condition. This study deals with the evaluation of unstructured kinetic models to understand the behavior of biomass, tannase production and tannic acid degradation, with the fermentation time...
October 2017: 3 Biotech
https://www.readbyqxmd.com/read/28794867/rapid-onset-of-amiodarone-induced-pulmonary-toxicity-after-lung-lobe-resection-a-case-report-and-review-of-recent-literature
#19
Heiko Baumann, Phillip Fichtenkamm, Thomas Schneider, Jürgen Biscoping, Michael Henrich
Amiodarone-induced pulmonary toxicity (APT) is a severe side effect that can lead to lung fibrosis or fatal respiratory failure. Usually APT occurs during long term therapy after administration of prolonged loading doses or high cumulative doses. We present the case of a 58 year old woman who underwent thoracic surgery with lobe resection. She developed atrial fibrillation with hemodynamic-instability on the first post-operative day. We initiated amiodarone therapy and four days later she developed respiratory failure...
September 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/28792729/ni3s2-nanosheet-flowers-decorated-with-cds-quantum-dots-as-a-highly-active-electrocatalysis-electrode-for-synergistic-water-splitting
#20
Shanqing Qu, Jun Huang, Jinsong Yu, Guangliang Chen, Wei Hu, Mengmeng Yin, Rui Zhang, Sijun Chu, Chaorong Li
A facile and effective strategy for fabricating a three-dimensionally (3-D) structured nanocomposite catalyst based on nonprecious metals for water splitting in alkaline electrolyzers is reported in this paper. This nanocomposite catalyst consists of the CdS quantum dots (QDs) decorated Ni3S2 nanosheet flowers deposited on the plasma-treated nickel foam (PNF). The NiO formed during the plasma treatment is shown to play an important role for pushing the hydrogen and oxygen evolution reactions (HER and OER) in alkaline media...
August 9, 2017: ACS Applied Materials & Interfaces
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