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https://www.readbyqxmd.com/read/29049943/occurrence-and-profile-of-organophosphorus-compounds-in-fine-and-coarse-particulate-matter-from-two-urban-areas-of-china-and-pakistan
#1
Yasir Faiz, Naila Siddique, Huan He, Cheng Sun, Shahida Waheed
Seven organophosphorus compounds (OPs) were measured in urban fine and coarse particulate matter (PM) collected from two sites of Nanjing (XCNUC), China and Islamabad (APHSP), Pakistan. The fine PM mass at APHSP site was significantly higher (p = 0.005) in the spring (mean 22.5 μg/m(3)) than in the summer (mean 12.7 μg/m(3)). The total concentration, ∑(7)OPs, of samples collected at APHSP was found significantly higher in coarse (range 672-47621 pg/m(3)) than in fine PM (range 1200-15213 pg/m(3)); while ∑(7)OPs from XCNUC in fine (range 1696-15063 pg/m(3)) and coarse PM (range 2053-5379 pg/m(3)) were statistically different in samples during summer, based on two-sample t-test at 0...
October 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29048827/-simultaneous-determination-of-11-mycotoxins-in-feeds-by-high-performance-liquid-chromatography-tandem-mass-spectrometry
#2
Yunji Wei, Min Feng, Zhenyi Zhu, Jian He, Jinrong Shen, Zhenghe He, Xian Qin, Liying Zhou
A high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method was developed for the simultaneous determination of 11 mycotoxins in feeds. The samples were extracted with acetonitrile, then cleaned up by multifunctional purification column filler and PRIME HLB solid phase extraction column. The 11 mycotoxins were separated on an Agilent Zorbax SB-C18 column (150 mm×2.1 mm, 3.5 μ m) with gradient elution program, and methanol-5 mmol/L ammonium acetate solution containing 0.1%(v/v) formic acid were used as mobile phases...
August 8, 2017: Se Pu, Chinese Journal of Chromatography
https://www.readbyqxmd.com/read/29048345/enhancement-of-fracture-toughness-of-epoxy-nanocomposites-by-combining-nanotubes-and-nanosheets-as-fillers
#3
Nadiim Domun, Keith R Paton, Homayoun Hadavinia, Toby Sainsbury, Tao Zhang, Hibaaq Mohamud
In this work the fracture toughness of epoxy resin has been improved through the addition of low loading of single part and hybrid nanofiller materials. Functionalised multi-walled carbon nanotubes (f-MWCNTs) was used as single filler, increased the critical strain energy release rate, GIC, by 57% compared to the neat epoxy, at only 0.1 wt% filler content. Importantly, no degradation in the tensile or thermal properties of the nanocomposite was observed compared to the neat epoxy. When two-dimensional boron nitride nanosheets (BNNS) were added along with the one-dimensional f-MWCNTs, the fracture toughness increased further to 71...
October 19, 2017: Materials
https://www.readbyqxmd.com/read/29046850/preparation-and-characterization-of-polycarbonate-multiwalled-carbon-nanotube-nanocomposites
#4
Claudio Larosa, Niranjan Patra, Marco Salerno, Lara Mikac, Remo Merijs Meri, Mile Ivanda
A polymer nanocomposite was produced by ultrasonic-assisted dispersion of multiwalled carbon nanotubes (MWCNTs) in a polycarbonate matrix using p-xylene and dichloromethane as the solvents. The filler loading was varied from 1 to 3 wt % in order to examine the effect of MWCNTs on the structure and properties of the composites. The nanocomposites were characterized by DSC, DTA, TGA, UV-vis, FTIR and Raman spectroscopy to evaluate the changes induced by the filler in the polymer matrix. UV-vis, FTIR and Raman spectroscopy measurements confirmed the presence of the dispersed phase in the composite films, while TGA and DSC analysis of the nanocomposites revealed enhanced thermal stability and decreased crystallinity, respectively, as compared to the neat polymer...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/29045155/diamine-appended-mg2-dobpdc-nanorods-as-phase-change-fillers-in-mixed-matrix-membranes-for-efficient-co2-n2-separations
#5
Lorenzo Maserati, Stephen M Meckler, Jonathan E Bachman, Jeffrey R Long, Brett A Helms
Despite the availability of chemistries to tailor the pore architectures of microporous polymer membranes for chemical separations, trade-offs in permeability and selectivity with functional group manipulations nevertheless persist, which ultimately places an upper bound on membrane performance. Here we introduce a new design strategy to uncouple these attributes of the membrane. Key to our success is the incorporation phase-change metal-organic frameworks (MOFs) into the polymer matrix, which can be used to increase the solubility of a specific gas in the membrane and thereby its permeability...
October 18, 2017: Nano Letters
https://www.readbyqxmd.com/read/29040358/tissue-expansion-using-hyaluronic-acid-filler-for-single-stage-ear-reconstruction-a-novel-concept-for-difficult-areas
#6
Amir Inbal, Benjamin T Lemelman, Eran Millet, Andrew Greensmith
Background: Auricular reconstruction is one of the most challenging procedures in plastic surgery. An adequate skin envelope is essential for cartilage framework coverage, yet few good options exist without additional surgery. We propose a novel method for minimally invasive tissue expansion, using hyaluronic acid (HA) filler to allow for single-stage ear reconstruction. Objectives: To introduce the novel concept of HA filler for tissue expansion in ear reconstruction, and as an alternative to traditional expansion techniques...
July 20, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29037879/a-risk-based-approach-for-assessing-the-recycling-potential-of-an-alkaline-waste-material-as-road-sub-base-filler-material
#7
Martina Di Gianfilippo, Iason Verginelli, Giulia Costa, Riccardo Spagnuolo, Renato Gavasci, Francesco Lombardi
In this work we present an integrated risk-based approach that can be used to evaluate the recycling potential of an alkaline waste material such as incineration bottom ash (BA) as unbound material for road sub-base construction. This approach, which is aimed at assessing potential risks to the groundwater resource (in terms of drinking water quality) and human health associated to the leaching of contaminants from the BA, couples the results of leaching tests for the estimation of source concentrations with the fate and transport models usually adopted in risk assessment procedures...
October 13, 2017: Waste Management
https://www.readbyqxmd.com/read/29036917/the-effect-of-tio%C3%A2-doped-photocatalytic-nano-additives-on-the-hydration-and-microstructure-of-portland-and-high-alumina-cements
#8
María Pérez-Nicolás, Íñigo Navarro-Blasco, José M Fernández, José Ignacio Alvarez
Mortars with two different binders (Portland cement (PC) and high alumina cement (HAC)) were modified upon the bulk incorporation of nano-structured photocatalytic additives (bare TiO₂, and TiO₂ doped with either iron (Fe-TiO₂) or vanadium (V-TiO₂)). Plastic and hardened state properties of these mortars were assessed in order to study the influence of these nano-additives. Water demand was increased, slightly by bare TiO₂ and Fe-TiO₂, and strongly by V-TiO₂, in agreement with the reduction of the particle size and the tendency to agglomerate...
October 14, 2017: Nanomaterials
https://www.readbyqxmd.com/read/29036027/early-macrophage-infiltration-improves-the-fat-graft-survival-by-inducing-angiogenesis-and-hematopoietic-stem-cell-recruitment
#9
Junrong Cai, Jingwei Feng, Kaiyang Liu, Shaolong Zhou, Feng Lu
BACKGROUND: Fat grafting is a popular soft tissue filler method; however, its results are variable and technique-dependent. Macrophages are present in fat grafts and closely associated with tissue regeneration. We hypothesized that activation/depletion of early macrophages in transferred fat improves/impairs fat graft survival. METHODS: Mouse inguinal fat (~150 mg) was transferred autologously. Fat grafting was first performed without other manipulations to obtain baseline information...
October 12, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29033018/irradiated-recycled-plastic-as-a-concrete-additive-for-improved-chemo-mechanical-properties-and-lower-carbon-footprint
#10
Carolyn E Schaefer, Kunal Kupwade-Patil, Michael Ortega, Carmen Soriano, Oral Büyüköztürk, Anne E White, Michael P Short
Concrete production contributes heavily to greenhouse gas emissions, thus a need exists for the development of durable and sustainable concrete with a lower carbon footprint. This can be achieved when cement is partially replaced with another material, such as waste plastic, though normally with a tradeoff in compressive strength. This study discusses progress toward a high/medium strength concrete with a dense, cementitious matrix that contains an irradiated plastic additive, recovering the compressive strength while displacing concrete with waste materials to reduce greenhouse gas generation...
October 9, 2017: Waste Management
https://www.readbyqxmd.com/read/29029848/fluoride-containing-bioactive-glass-composite-for-orthodontic-adhesives-ion-release-properties
#11
N A Al-Eesa, F S L Wong, A Johal, R G Hill
OBJECTIVE: Dental materials that release calcium, phosphate and fluoride ions could prevent demineralisation and/or enhance remineralisation of enamel. The objective was to develop a novel bioactive glass (BAG) resin and investigate pH changes and ion release in 3 immersion media. METHODS: Quench melt derived BAG (35.25% SiO2, 6% Na2O, 43% CaO, 5.75% P2O5, and 10% CaF2) was incorporated into a resin (42.25% BisEMA, 55% TEGDMA, 0.25% DMAEM, 0.5% camphorquinone and 2% 4-Meta), with a filler load of 80% by weight...
October 10, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29028858/approach-to-the-mature-cosmetic-patient-aging-gracefully
#12
Susan Weinkle, Michael Saco
<p>Aging gracefully has taken on a whole new meaning over the past few decades as new aesthetic treatments have been developed and are becoming more sophisticated by the day. The aging process, which is exacerbated by chronic UV exposure, results in dyspigmentation, loss of skin laxity, precancerous and cancerous skin lesions, fat loss and redistribution, and bone resorption. Laser and light devices can be used to treat dyspigmentation, while neuromodulators and soft tissue fillers can be used for rhytides and revolumization...
June 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/29028608/establishment-of-nerve-growth-factor-gradients-on-aligned-chitosan-polylactide-alginate-fibers-for-neural-tissue-engineering-applications
#13
Hua Wu, Jiaoyan Liu, Qing Fang, Bo Xiao, Ying Wan
Nerve conduits containing aligned fibrous fillers with gradiently distributed signal molecules are essential for long-gap nerve repair. This study was to develop an approach for establishing nerve growth factor (NGF) gradients onto the aligned chitosan-polylactide (CH-PLA) fibers. CH-PLA containing 37wt% of PLA was spun into fibers using a wet-spinning technique. CH-PLA fibers showed much higher wet-state tensile strength, enhanced degradation tolerance and significantly lower swelling degree in comparison to chitosan fibers...
October 5, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29027785/chemically-cross-linked-mof-membrane-generated-from-imidazolium-based-ionic-liquid-decorated-uio-66-type-nmof-and-its-application-toward-co2-separation-and-conversion
#14
Bing-Jian Yao, Luo-Gang Ding, Fei Li, Jiang-Tao Li, Qi-Juan Fu, Yujie Ban, Ang Guo, Yu-Bin Dong
CO2 capture and transformation are of great importance to make cuts in greenhouse gas emissions. Nano metal-organic frameworks (NMOFs) could serve as the ideal fillers for polymer-membranes owing to their structural diversity and regulable micro-environment of the nanocage. Herein, a bifunctional robust and chemically cross-linked NMOF-based membrane was successfully constructed by the post-synthetic polymerization of imidazolium-based ionic liquid decorated UiO-66 type nanoparticles (NPs) and isocyanate-terminated polyurethane oligomer under mild condition...
October 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29027611/preparation-of-flexible-bone-tissue-scaffold-utilizing-sea-urchin-test-and-collagen
#15
Naga Vijaya Lakshmi Manchinasetty, Sho Oshima, Masanori Kikuchi
Gonads of sea urchin are consumed in Japan and some countries as food and most parts including its tests are discarded as marine wastes. Therefore, utilization of them as functional materials would reduce the waste as well as encourage Japanese fishery. In this study, magnesium containing calcite granules collected from sea urchin tests were hydrothermally phosphatized and the obtained granules were identified as approximately 82% in mass of magnesium containing β-tricalcium phosphate and 18% in mass of nonstoichiometric hydroxyapatite, i...
October 13, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/29025237/the-role-of-injectables-in-aesthetic-surgery-financial-implications
#16
Bryson G Richards, William F Schleicher, Gehaan F D'Souza, Raymond Isakov, James E Zins
Background: The plastic surgeon competes with both core and noncore physicians and surgeons for traditional cosmetic procedures. In 2007, the American Society for Aesthetic Plastic Surgery (ASAPS) and the American Society of Plastic Surgeons (ASPS) joined efforts to form a Cosmetic Medicine Task Force to further analyze this trend. Objectives: Our objective is to document and quantify the patient capture and total collections generated in a single surgeon's practice exclusive from Botulinum Toxin A and filler injections over a 10-year period...
October 1, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29025227/the-efficacy-of-vibration-anesthesia-on-reducing-pain-levels-during-lip-augmentation-worth-the-buzz
#17
Kirdar Guney, Billur Sezgin, Reha Yavuzer
Background: Lip augmentation procedures have increased drastically in the last years as patients seek to enhance the shape and size of their lips with dermal fillers. One of the main concerns faced with these procedures is the pain inflicted through injections. On the other hand, many different techniques have been introduced for the reduction of pain while performing office-based minimal invasive procedures. Objectives: This study aims to determine the analgesic effect of vibration anesthesia during lip augmentation procedures and to evaluate its overall effect on the comfort of patients...
October 1, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29025226/a-histopathologic-diagnosis-of-vascular-occlusion-after-injection-of-hyaluronic-acid-filler-findings-of-intravascular-foreign-body-and-skin-necrosis
#18
Seiichi Maruyama
Before injecting hyaluronic acid (HA) filler into high-risk zones of the face, considerable caution must be exercised, including careful selection of the most appropriate filler, volume, and injection technique. Rare but severe adverse events have occurred during and after injection of HA filler in or around the periorbital region, such as skin necrosis and blindness. In the present case, involving a 57-year-old woman, approximately 0.1 mL of HA was injected into each side of the glabella to minimize wrinkles...
October 1, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29025219/commentary-on-new-high-dose-pulsed-hyaluronidase-protocol-for-hyaluronic-acid-filler-vascular-adverse-events
#19
Jonathan M Sykes
No abstract text is available yet for this article.
July 1, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29025217/use-of-lipotransfer-in-scleroderma
#20
Michelle F Griffin, Aurora Almadori, Peter E Butler
Lipotransfer for soft tissue filling is a well-established plastic and aesthetic surgical technique. Elective fat grafting is considered a safe and well-tolerated procedure. Coleman and others have reported that fat grafting may have tissue regenerative properties and not only serve as a soft tissue filler. There have been reports from our group and others that it may improve fibrosis secondary to many different pathological aetiologies including scleroderma, burn injury, lichen sclerosis, graft vs host disease, and radiation...
July 1, 2017: Aesthetic Surgery Journal
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