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https://www.readbyqxmd.com/read/28340530/effect-of-severe-plastic-deformation-on-structure-and-properties-of-al-sc-ta-and-al-sc-ti-alloys
#1
Alla Berezina, Tetiana Monastyrska, Olexandr Davydenko, Oleh Molebny, Sergey Polishchuk
The comparative analysis of the effect of monotonous and non-monotonous severe plastic deformations (SPD) on the structure and properties of aluminum alloys has been carried out. Conventional hydrostatic extrusion (HE) with a constant deformation direction and equal-channel angular hydroextrusion (ECAH) with an abrupt change in the deformation direction were chosen for the cases of monotonous and non-monotonous SPD, respectively. Model cast hypoeutectic Al-0.3%Sc alloys and hypereutectic Al-0.6%Sc alloys with Ta and Ti additives were chosen for studying...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28340522/tin-oxide-carbon-coated-sepiolite-nanofibers-with-enhanced-lithium-ion-storage-property
#2
Kai Hou, Xin Wen, Peng Yan, Aidong Tang, Huaming Yang
Natural sepiolite (Sep) nanofibers were coated with carbon and nanoscale SnO2 to prepare an emerging nanocomposite (SnO2-C@Sep), which exhibited enhanced electrochemical performance. Sepiolite could act as a steady skeleton, carbon coating principally led sepiolite from an isolated to an electric state, and decoration of nanoscale SnO2 was beneficial to the functionization of sepiolite. Cycling performances indicated that SnO2-C@Sep showed higher discharge capacities than commercial SnO2 after 50 cycles. The nanocomposite SnO2-C@Sep possessed enhanced lithium storage properties with stable capacity retention and low cost, which could open up a new strategy to synthesize a variety of functional hybrid materials based on the cheap and abundant clay and commercialization of lithium-metal oxide batteries...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28340495/residents-learning-curve-of-lumbar-transforaminal-epidural-steroid-injections
#3
Holger Joswig, Sarah Roberta Haile, Gerhard Hildebrandt, Martin Nikolaus Stienen
Background and Study Aims There is a paucity of literature on beginners' training and on its connection with patient safety for transforaminal epidural steroid injections (TFESIs). This study retrospectively assessed the learning curves and associated complications of neurosurgery residents never previously exposed to TFESI and compared them with experienced board-certified faculty neurosurgeons (BCFNs). Material and Methods Procedure time in minutes, dose-area product (DAP) in cGy*cm(2), periprocedural observations, and complications in 354 TFESIs for radicular pain secondary to lumbar disk herniation or lumbar spinal stenosis were extracted from operative notes and the electronic infiltration logbook in the per-injection format...
March 24, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28340490/a-novel-method-of-neo-osseous-flap-prefabrication-induction-of-free-calvarial-periosteum-with-bioactive-glass
#4
Ali Aliyev, Omer Ekin, Ozan Bitik, Gokhan Tuncbilek
Background Reconstruction of craniofacial bone defects is a primary focus of craniofacial surgery. Although autogenous bone grafts remain as the gold standard, alloplastic materials have also gained widespread popularity due to their off-the-shelf availability, ease of use, and durability. In addition to replacing the missing bone, some of these alloplastic materials have also been found to induce new bone formation. Objectives In this study, the phenomenon of neo-osseous induction with bioactive glass was investigated for different implant-soft tissue configurations...
March 24, 2017: Journal of Reconstructive Microsurgery
https://www.readbyqxmd.com/read/28340486/review-of-current-nuclear-fallout-codes
#5
REVIEW
Jerrad P Auxier, John D Auxier, Howard L Hall
The importance of developing a robust nuclear forensics program to combat the illicit use of nuclear material that may be used as an improvised nuclear device is widely accepted. In order to decrease the threat to public safety and improve governmental response, government agencies have developed fallout-analysis codes to predict the fallout particle size, dose, and dispersion and dispersion following a detonation. This paper will review the different codes that have been developed for predicting fallout from both chemical and nuclear weapons...
March 21, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28340484/engineering-of-layered-lipid-encapsulated-drug-nanoparticles-through-spray-drying
#6
Mahak Sapra, Y S Mayya, Chandra Venkataraman
Drug-containing nanoparticles have been synthesized through the spray-drying of submicron droplet aerosols by using matrix materials such as lipids and biopolymers. Understanding layer formation in composite nanoparticles is essential for the appropriate engineering of particle substructures. The present study developed a droplet-shrinkage model for predicting the solid-phase formation of two non-volatile solutes-stearic acid lipid and a set of drugs, by considering molecular volume and solubility. Nanoparticle formation was simulated to define the parameter space of material properties and process conditions for the formation of a layered structure with the preferential accumulation of the lipid in the outer layer...
March 18, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28340480/using-uhplc-q-trap-ms-as-a-complementary-technique-to-in-depth-mine-uplc-q-tof-ms-data-for-identifying-modified-nucleosides-in-urine
#7
Zhiwei Lu, Qing Wang, Meiling Wang, Shuang Fu, Qingqing Zhang, Zhixin Zhang, Huizhen Zhao, Yuehong Liu, Zhenhai Huang, Ziye Xie, Honghong Yu, Xiaoyan Gao
Modified nucleosides, metabolites of RNA, are potential biomarkers of cancer before the appearance of morphological abnormalities. It is of great significance to comprehensively detect and identify nucleosides in human urine for discovery of cancer biomarkers. However, the lower abundance, the greater polarity and the matrix effects make it difficult to detect urinary nucleosides. In this paper, an integrated method consisted of sample preparation followed by ultraperformance liquid chromatography quadrupole time-of-flight mass spectrometry (UPLC Q-TOF/MS) detection and primary identification, then ultra-high performance liquid chromatography coupled with hybrid triple quadrupole linear ion trap mass spectrometer (UHPLC Q-Trap/MS) further identification and validation were introduced...
March 12, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28340436/a-comparative-study-on-biochemical-methane-potential-of-algal-substrates-implications-of-biomass-pre-treatment-and-product-extraction
#8
Faiz Ahmad Ansari, Shantanu Wahal, Sanjay Kumar Gupta, Ismail Rawat, Faizal Bux
Dried powdered algae (SDPA), heat treated algae (MHTA), lipid extracted algae (LEA) and protein extracted algae (PEA) were digested to determine biomethane potential. The average CH4 production rate was ∼2.5-times higher for protein and lipid extracted algae than for whole algae (SDPA and MHTA) whilst the cumulative CH4 production was higher for pre-treated algae. Highest cumulative CH4 production (318.7mlCH4g(-1)VS) was observed for MHTA followed by SDPA (307.4mlCH4g(-1)VS). CH4/CO2 ratios of 1.5 and 0.7 were observed for MHTA and LEA respectively...
March 14, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28340434/potentially-direct-interspecies-electron-transfer-of-methanogenesis-for-syntrophic-metabolism-under-sulfate-reducing-conditions-with-stainless-steel
#9
Yue Li, Yaobin Zhang, Yafei Yang, Xie Quan, Zhiqiang Zhao
Direct interspecies electron transfer (DIET) is an alternative to syntrophic metabolism in natural carbon cycle as well as in anaerobic digesters, but its function in anaerobic treatment of sulfate-containing wastewater have not yet to be described. Here, conductive stainless steel was added into anaerobic digesters for treating sulfate-containing wastewater to investigate the potential role of DIET in the response to the sulfate impact. Results showed that adding the conductive stainless steel made the anaerobic digestion less affected by the sulfate reduction than adding insulative plastic material...
March 12, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28340433/feasibility-of-carbon-dioxide-sequestration-by-spongiochloris-sp-microalgae-during-petroleum-wastewater-treatment-in-airlift-bioreactor
#10
Abdeldjalil Abid, Faten Saidane, Moktar Hamdi
The aim of this work was to study the ability of using Hydrocabonoclastic native microbial and Spongiochloris sp microalgae in airlift bioreactors couples in order to restore hydrocarbons wastewater and develop the capacity of natural systems to reduce greenhouse effect through maximal control of CO2 gas emission in atmosphere. The kinetic parameters of CO2 gas fixation level and conversion it into biological material by microalgae as the biodegradation process effect in hydrocarbon have been evaluated. The result present that maximum specific growth rate μmax of Spongiochloris sp was (0...
March 10, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28340417/interfacial-interactions-between-skeletonema-costatum-extracellular-organic-matter-and-metal-oxides-implications-for-ceramic-membrane-filtration
#11
Noor Zaouri, Leonardo Gutierrez, Laure Dramas, Daniel Garces, Jean-Philippe Croue
In the current study, the interfacial interactions between the high molecular weight (HMW) compounds of Skeletonema costatum (SKC) extracellular organic matter (EOM) and ZrO2 or Al2O3, were investigated by atomic force microscopy (AFM). HMW SKC-EOM was rigorously characterized and described as a hydrophilic organic compound mainly comprised of polysaccharide-like structures. Lipids and proteins were also observed, although in lower abundance. HMW SKC-EOM displayed attractive forces during approaching (i.e., leading to jump-to-contact events) and adhesion forces during retracting regime to both metal oxides at all solution conditions tested, where electrostatics and hydrogen bonding were suggested as dominant interacting mechanisms...
March 21, 2017: Water Research
https://www.readbyqxmd.com/read/28340410/development-of-fusogenic-glass-surfaces-that-impart-spatiotemporal-control-over-macrophage-fusion-direct-visualization-of-multinucleated-giant-cell-formation
#12
James J Faust, Wayne Christenson, Kyle Doudrick, Robert Ros, Tatiana P Ugarova
Implantation of synthetic material, including vascular grafts, pacemakers, etc. results in the foreign body reaction and the formation of multinucleated giant cells (MGCs) at the exterior surface of the implant. Despite the long-standing premise that fusion of mononucleated macrophages results in the formation of MGCs, to date, no published study has shown fusion in context with living specimens. This is due to the fact that optical-quality glass, which is required for the majority of live imaging techniques, does not promote macrophage fusion...
March 2, 2017: Biomaterials
https://www.readbyqxmd.com/read/28340398/proteomics-analysis-of-maize-zea-mays-l-grain-based-on-itraq-reveals-molecular-mechanisms-of-poor-grain-filling-in-inferior-grains
#13
Tao Yu, Geng Li, Peng Liu, Shuting Dong, Jiwang Zhang, Bin Zhao
In maize, inferior grains (IG) located on the upper part of the ear have poor grain filling process compared to superior grains (SG) located on the middle and lower parts of the ear. This difference limits satisfactory yield and quality; however, the underlying molecular mechanisms remain unknown. Here, using the isobaric tag for relative and absolute quantification (iTRAQ) technology, the proteomes of IG and SG during early and middle grain filling stages were investigated. In total, 4720 proteins were identified in maize grain and 305 differentially accumulated proteins (DiAPs) were detected between IG and SG...
March 11, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28340397/quantification-of-hydrocarbon-species-on-surfaces-by-combined-microbalance-ftir
#14
Andrew I McNab, Tom Heinze, Alan J McCue, Davide Dionisi, James A Anderson
Absorption coefficients for the asymmetric stretching modes of CH3 and CH2 groups formed by adsorbing alkyl chained species from the vapour phase onto two different adsorbents; a γ-alumina support material and a supported metal catalyst have been determined using a custom made thermogravimetric-infrared cell. Results show that despite variations in the individually calculated absorption coefficients (ca. ±20%), the ratio of the absorption coefficients (CH2:CH3) remained consistent despite employing adsorbates of varying chain length and functionality, and despite the choice of adsorbents which exhibited different surface areas and light scattering characteristics...
March 16, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28340391/optimization-of-the-marinelli-beaker-dimensions-using-genetic-algorithm
#15
Seyed Mehrdad Zamzamian, Seyed Abolfazl Hosseini, Mohammad Samadfam
A computational code, based on the genetic algorithm and MCNPX version 2.6 code was developed and used to investigate the effects of some important parameters of HPGe detector (such as Al cap thickness, dead-layer thickness and Ge hole size) on optimum dimensions of marinelli beaker. In addition, the effects of detector material on optimal beaker dimensions were also investigated. Finally, the optimized beaker dimensions at various beaker volumes (300, 500, 700, 1000 and 1500 cm(3)) were determined for some conventional Ge detectors with different crystal sizes (16 sizes)...
March 21, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28340387/an-exploration-of-the-effect-and-interaction-mechanism-of-bisphenol-a-on-waste-sludge-hydrolysis-with-multi-spectra-isothermal-titration-microcalorimetry-and-molecule-docking
#16
Guangying Hou, Rui Zhang, Xiaoyan Hao, Chunguang Liu
An increasing amount of bisphenol A (BPA) is being produced and used, then discharged into sewage treatment plants and accumulated in sludge or soil, when the sludge is used as fertilizer. Accumulation of BPA in sludge or soil causes poisoning to the enzyme, which affects the biological treatment of sludge and the circulation and conversion of materials in soil. In this research, effect of BPA on sludge hydrolysis is studied from the respect of concentration and components of soluble organic matter in sludge, using three-dimensional fluorescence spectra...
March 10, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28340386/constructed-ils-coated-porous-magnetic-nickel-cobaltate-hexagonal-nanoplates-sensing-materials-for-the-simultaneous-detection-of-cumulative-toxic-metals
#17
Yuanyuan Dong, Lei Zhang
The different morphologies of magnetic nickel cobaltate (NiCo2O4) electrocatalysts, consisting of nanoparticles (NiCo2O4-N), nanoplates (NiCo2O4-P) and microspheres (NiCo2O4-S) were fabricated. It was found that the electrocatalytic properties of the sensing materials were strongly dependent on morphology and specific surface area. The porous NiCo2O4 hexagonal nanoplates coupled with ILs as modified materials (ILs@NiCo2O4-P) for the simultaneous determination of thallium (Tl(+)), lead (Pb(2+)) and copper (Cu(2+)), exhibited high sensitivity, long-time stability and good repeatability...
March 18, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28340384/effects-of-waste-eggshells-and-sic-addition-on-specific-strength-and-thermal-expansion-of-hybrid-green-metal-matrix-composite
#18
Satpal Sharma, Shashi Prakash Dwivedi
Chicken eggshell waste is an industrial byproduct, and its disposal constitutes a serious environmental hazard. Chicken eggshell can be used in commercial products to produce new materials with low cost and density. Low density material which can sustain at higher temperature is a remarkable area of research. Keeping these facts in the mind, the present investigation aims to study the physical behaviour, specific strength and thermal expansion of AA2014/SiC/carbonized eggshell hybrid green metal matrix composites...
March 18, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28340296/ultra-low-surface-recombination-velocity-in-passivated-ingaas-inp-nanopillars
#19
Aura Higuera-Rodriguez, Bruno Romeira, Simone Birindelli, Lachlan E Black, Barry Smalbrugge, Peter J van Veldhoven, Wilhelmus Erwin M M Kessels, Meint K Smit, Andrea Fiore
The III-V semiconductor InGaAs is a key material for photonics since it provides optical emission and absorption in the 1.55 μm telecommunication wavelength window. However, InGaAs suffers from pronounced non-radiative effects associated with its surface states, which affect the performance of nanophotonic devices for optical interconnects, namely nanolasers and nanodetectors. This work reports the strong suppression of surface recombination of undoped InGaAs/InP nanostructured semiconductor pillars using a combination of ammonium sulfide, (NH4)2S, passivation and silicon oxide, SiOx, coating...
March 24, 2017: Nano Letters
https://www.readbyqxmd.com/read/28340229/meaningful-use-in-the-safety-net-a-rapid-ethnography-of-patient-portal-implementation-at-five-community-health-centers-in-california
#20
Sara L Ackerman, Urmimala Sarkar, Lina Tieu, Margaret A Handley, Dean Schillinger, Kenneth Hahn, Mekhala Hoskote, Gato Gourley, Courtney Lyles
Objective: US health care institutions are implementing secure websites (patient portals) to achieve federal Meaningful Use (MU) certification. We sought to understand efforts to implement portals in "safety net" health care systems that provide services for low-income populations. Materials and Methods: Our rapid ethnography involved visits at 4 California safety net health systems and in-depth interviews at a fifth. Visits included interviews with clinicians and executives ( n  = 12), informal focus groups with front-line staff ( n  = 35), observations of patient portal sign-up procedures and clinic work, review of marketing materials and portal use data, and a brief survey ( n  = 45)...
March 15, 2017: Journal of the American Medical Informatics Association: JAMIA
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