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https://www.readbyqxmd.com/read/28092634/correlation-of-cation-distribution-with-the-hyperfine-and-magnetic-behaviour-of-ni0-3zn0-4co0-2cu0-1fe2o4-nanoparticles-and-their-microwave-absorption-properties-when-encapsulated-in-multi-walled-carbon-nanotubes
#1
Madhumita Dalal, Ayan Mallick, Jean-Marc Greneche, Dipankar Das, Pabitra K Chakrabarti
Nanocrystalline samples of Ni0.3Zn0.4Co0.2Cu0.1Fe2O4 (NZCCF) are prepared by a simple co-precipitation method. To obtain nanoparticles of different sizes, the as prepared sample is annealed at 400, 600, 800 and 1000 °C. Nanoparticles of the sample annealed at 600 °C are encapsulated in multi-walled carbon nanotubes (MWCNT). To confirm the crystallographic phase, x-ray diffraction (XRD) patterns are analyzed by the Rietveld method and cation distribution in A- and B-sites is estimated from the analysis. Occupancy of Zn(2+) ions in A-site and that of Fe(3+) ions in B-site increase with the increase of annealing temperature (T A) and lattice parameters lie within 8...
January 16, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28090771/differential-adhesive-bioactive-properties-of-polymeric-surface-coated-with-graphene-oxide-thin-film
#2
Sudhin Thampi, A Maya Nandkumar, Vignesh Muthuvijayan, Ramesh Parameswaran
Surface engineering of implantable devices involving polymeric biomaterials has become an essential aspect for medical implants. Surface enhancement technique can provide an array of unique surface properties that improves its biocompatibility and functionality as an implant. Polyurethane based implants that have found extensively acclaimed usage as an implant in biomedical applications, especially in the area of cardiovascular devices still lacks any mechanism to ward off bacterial or platelet adhesion. To bring out such a defense mechanism we are proposing a surface modification technique...
January 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28088710/short-range-shooting-distance-estimation-using-variable-pressure-sem-images-of-the-surroundings-of-bullet-holes-in-textiles
#3
Ruth Hinrichs, Paulo Ricardo Ost Frank, M A Z Vasconcellos
Modifications of cotton and polyester textiles due to shots fired at short range were analyzed with a variable pressure scanning electron microscope (VP-SEM). Different mechanisms of fiber rupture as a function of fiber type and shooting distance were detected, namely fusing, melting, scorching, and mechanical breakage. To estimate the firing distance, the approximately exponential decay of GSR coverage as a function of radial distance from the entrance hole was determined from image analysis, instead of relying on chemical analysis with EDX, which is problematic in the VP-SEM...
December 29, 2016: Forensic Science International
https://www.readbyqxmd.com/read/28081239/statistical-modeling-applied-to-deformation-relaxation-processes-in-a-composite-biopolymer-network-induced-by-magnetic-field
#4
Javier Tarrío-Saavedra, Cécilia Galindo González, Salvador Naya, Jorge López-Beceiro, Alain Ponton
This study investigated a methodology based on image processing and statistics to characterize and model the deformation upon controlled and uniform magnetic field and the relaxation under zero field of droplets observed in aqueous solutions of sodium alginate incorporating magnetic maghemite nanoparticles stabilized by adsorption of citrate ions. The changes of droplet geometry were statistically analyzed using a new approach based on the data obtained from optical microscopy, image processing, nonlinear regression, evolutionary optimization, analysis of variance and resampling...
2017: PloS One
https://www.readbyqxmd.com/read/28079637/ln2-cd10-and-ezrin-do-not-distinguish-between-atypical-fibroxanthoma-and-undifferentiated-pleomorphic-sarcoma-or-predict-clinical-outcome
#5
Allison Hanlon, Thomas Stasko, Dan Christiansen, Nika Cyrus, Anjela Galan
BACKGROUND: Atypical fibroxanthoma (AFX) is a rare cutaneous spindled cell neoplasm. For both diagnostic and therapeutic purposes, it is important to distinguish AFX from other poorly differentiated tumors, including undifferentiated pleomorphic sarcoma (UPS). OBJECTIVE: The authors aimed to identify the clinical, histologic, and immunohistochemical expression of LN2, ezrin, and CD10 in AFX and UPS tumors. METHODS AND MATERIALS: The authors retrospectively examined the charts of patients with AFX and UPS treated with Mohs micrographic surgery (MMS) at 2 academic institutions...
January 10, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28076292/445-nm-diode-laser-assisted-debonding-of-self-ligating-ceramic-brackets
#6
Steffen Stein, Alexander Kleye, Michael Schauseil, Andreas Hellak, Heike Korbmacher-Steiner, Andreas Braun
OBJECTIVES: This study determined the influence of irradiation on aesthetic ceramic brackets with a novel 445-nm diode laser prior to debonding on the bracket failure mode. MATERIALS AND METHODS: Thirty ceramic brackets (In-Ovation® C, GAC) were standard-bonded to the oral and buccal planed and polished enamel surfaces of 15 caries-free human 3rd molars. Prior to study-blinded debonding, the brackets in the laser group were irradiated with the diode laser (SIROLaser Blue®, Sirona), while the irradiation was simulated within the conventional group...
January 11, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28069234/ultrasonic-assisted-synthesis-of-bikitaite-zeolite-a-potential-material-for-hydrogen-storage-application
#7
Priyanka Roy, Nandini Das
Li containing Bikitaite zeolite has been synthesized by an ultrasound-assisted method and used as a potential material for hydrogen storage application. The Sonication energy was varied from 150W to 250W and irradiation time from 3h to 6h. The Bikitaite nanoparticles were characterized by X-ray diffraction (XRD), infrared (IR) spectral analysis, and field-emission scanning electron microscopy (FESEM) thermo-gravimetrical analysis and differential thermal analysis (TGA, DTA). XRD and IR results showed that phase pure, nano crystalline Bikitaite zeolites were started forming after 3h irradiation and 72h of aging with a sonication energy of 150W and nano crystalline Bikitaite zeolite with prominent peaks were obtained after 6h irradiation of 250W sonic energy...
May 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28065747/microscopy-based-studies-on-the-interaction-of-bio-based-silver-nanoparticles-with-bombyx-mori-nuclear-polyhedrosis-virus
#8
Selvaraj Tamilselvan, Thirunavukkarasu Ashokkumar, Kasivelu Govindaraju
In the present investigation, silver nanoparticles (AgNPs) interactions with Bombyx mori Nuclear Polyhedrosis virus (BmNPV) were characterized using High-Resolution Scanning Electron Microscopy (HR-SEM), Energy Dispersive X-ray Analysis (EDAX), Transmission Electron Microscopy (TEM), Atomic Force Microcopy (AFM) and Confocal Microscope (CM). HR-SEM study reveals that the biosynthesized AgNPs have interacted with BmNPV and were found on the surface. TEM micrographs of normal and viral polyhedra treated with AgNPs showed that the nanoparticles were accumulated in the membrane and it was noted that some of the AgNPs successfully penetrated the membrane by reaching the capsid of BmNPV...
January 5, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28065506/cryoelectron-microscopy-maps-of-human-papillomavirus-16-reveal-l2-densities-and-heparin-binding-site
#9
Jian Guan, Stephanie M Bywaters, Sarah A Brendle, Robert E Ashley, Alexander M Makhov, James F Conway, Neil D Christensen, Susan Hafenstein
Human papillomavirus (HPV) is a significant health burden and leading cause of virus-induced cancers. The current commercial vaccines are genotype specific and provide little therapeutic benefit to patients with existing HPV infections. Host entry mechanisms represent an excellent target for alternative therapeutics, but HPV receptor use, the details of cell attachment, and host entry are inadequately understood. Here we present near-atomic resolution structures of the HPV16 capsid and HPV16 in complex with heparin, both determined from cryoelectron micrographs collected with direct electron detection technology...
December 31, 2016: Structure
https://www.readbyqxmd.com/read/28064495/photophysical-behavior-of-isocyanine-clay-hybrids-in-solid-state
#10
Silvano R Valandro, Alessandra L Poli, Thaís F A Correia, Patricia C Lombardo, Carla C Schmitt
In the present study we have attempted to investigate, for the first time, the photophysical behavior of 1,1'-diethyl-2,4'-cyanine (ICY)/clay minerals hybrids in solid state. The effects promoted by ICY loading and clay type on the spectroscopic properties were studied by UV-Vis diffuse reflectance spectroscopy (DR) and different fluorescence techniques. The hybrids were characterized by X-ray diffraction (XRD) and thermogravimetric analysis (TGA). UV-Vis-DR revealed the formation of ICY H-aggregates in Wyoming montmorillonite (SWy-1) and Laponite (Lap), however J-aggregates were predominant for ICY on Arizona (SAz-1) and Barasym (SYn-1) montmorillonites...
January 8, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28063945/calcineurin-inhibitors-improve-memory-loss-and-neuropathological-changes-in-mouse-model-of-dementia
#11
Amit Kumar, Nirmal Singh
AIM: The present study was designed to investigate the potential of Cyclosporine (CsA) and Tacrolimus, the inhibitors of calcineurin (CaN) in cognitive deficits of mice. METHODS: Streptozotocin [STZ, 3mg/kg, injected intracerebroventricular (i.c.v.)] was used to induce memory deficits in NIH mice, while aged mice separately taken served as a natural model of dementia. Morris water maze (MWM) test was employed to evaluate learning and memory of the animals. A battery of biochemical and histopathological studies was also performed...
January 4, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28060173/squamous-cell-carcinoma-in-situ-upstaged-to-invasive-squamous-cell-carcinoma-a-5-year-single-institution-retrospective-review
#12
Sasima Eimpunth, Alina Goldenberg, Michael Shane Hamman, Gagik Oganesyan, Robert A Lee, Saowalak Hunnangkul, Silvia Soohyun Song, Tanya Greywal, Shang I Brian Jiang
BACKGROUND: Shave biopsy may not be able to accurately distinguish squamous cell carcinoma in situ (SCCIS) from invasive squamous cell carcinoma (SCC). Information on the incidence of biopsy-proven SCCIS upstaged to SCC after a more complete histologic examination is limited. OBJECTIVE: To determine the incidence and clinical risk factors associated with upstaging the biopsy diagnosis of SCCIS into invasive SCC based on findings during Mohs micrographic surgery (MMS)...
December 29, 2016: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28060172/applications-of-burow-s-grafts-in-the-reconstruction-of-mohs-micrographic-surgery-defects
#13
Anastasia Benoit, Brian C Leach, Joel Cook
BACKGROUND: Surgical defects in anatomically challenging locations, such as near free margins or crossing cosmetic subunits, may present reconstructive challenges to the dermatologic surgeon. For selected defects, Burow's grafts may produce functional and aesthetic results in a single operative session. OBJECTIVE: To describe the applications of the Burow's graft technique for the repair of defects after Mohs micrographic surgery. METHODS: An institutional review board-approved retrospective database review of surgical defects repaired with Burow's grafting after Mohs micrographic surgery at the Medical University of South Carolina was performed...
December 29, 2016: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28057356/cell-wall-synthesis-and-central-carbohydrate-metabolism-are-interconnected-by-the-snf1-mig1-pathway-in-kluyveromyces-lactis
#14
Dorthe Rippert, Katja Backhaus, Rosaura Rodicio, Jürgen J Heinisch
The trimeric AMP-activated kinase complex (AMPK) is conserved from yeast to humans and is best known for its role in balancing energy metabolism. Additional functions, including the regulation of cell wall biosynthesis, have been proposed for the SNF1 complex, the baker's yeast homolog of AMPK. We here demonstrate that this function is conserved in the Crabtree-negative milk yeast Kluyveromyces lactis. Deletion mutants in the genes encoding the subunits of the trimeric complex (Klsnf1, Klgal83, Klsnf4) displayed increased sensitivities towards cell wall stress agents and a mutant lacking the kinase subunit had a thinner cell wall in transmission electron micrographs as compared to wild type...
December 28, 2016: European Journal of Cell Biology
https://www.readbyqxmd.com/read/28056728/antimicrobial-effectiveness-of-synthesized-bioactive-silver-nanoparticles-by-the-actinomycetes-hgg16n-strain
#15
Bogusław Buszewskia, Viorica Railean-Plugarua, Paweł Pomastowski, Katarzyna Rafińskaa, Malgorzata Szultka-Mlynskaa, Tomasz Kowalkowskia
BACKGROUND: Biologically synthetized silver nanoparticles are promising antimicrobial agent. Flow cytometry, well diffusion methods, colony-forming units (CFU) and spectroscopic approach are commonly used in antimicrobial study. The aims of this study were to provides information about effectiveness of BioAgNPs synthesized by Actinomycetes HGG16n using fluorescence flow cytometry method as an alternative to the standard ones (well and disc diffusion method). METHODS: It was applied flow cytometry technique to monitor the antibacterial effect of biocolloidal silver and its combination with various commercial antibiotics against selected pathogens...
January 4, 2017: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/28054266/effects-of-supersaturation-control-strategies-on-hydroxyapatite-hap-crystallization-for-phosphorus-recovery-from-wastewater
#16
Hongliang Dai, Xiwu Lu, Yonghong Peng, Zixuan Yang, Huaqing Zhsssu
The HAP crystallization for phosphorus removal from wastewater contributes to an environmental friendly production due to the fact that it helps reduce or eliminate the water eutrophication as well as increases the recovery of mineral resources. However, the generated microcrystalline with poor settleability in high levels of supersaturation solution has a negative effect on the phosphorus recovery efficiency. To overcome the drawback, multiple reagent feed ports (four feed ports) and different recirculation ratio (1...
January 4, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28054154/interstitial-cell-modulation-of-pyeloureteric-peristalsis-in-the-mouse-renal-pelvis-examined-using-fibsem-tomography-and-calcium-indicators
#17
Hikaru Hashitani, Michael J Nguyen, Haruka Noda, Retsu Mitsui, Ryuhei Higashi, Keisuke Ohta, Kei-Ichiro Nakamura, Richard J Lang
Typical and atypical smooth muscle cells (TSMCs and ASMCs, respectively) and interstitial cells (ICs) within the pacemaker region of the mouse renal pelvis were examined using focused ion beam scanning electron (FIB SEM) tomography, immunohistochemistry and Ca(2+) imaging. Individual cells within 500-900 electron micrograph stacks were volume rendered and associations with their neighbours established. 'Ribbon-shaped', Ano1 Cl(-) channel immuno-reactive ICs were present in the adventitia and the sub-urothelial space adjacent to the TSMC layer...
January 4, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28051641/phosphate-recovery-through-struvite-family-crystals-precipitated-in-the-presence-of-citric-acid-mineralogical-phase-and-morphology-evaluation
#18
D S Perwitasari, L Edahwati, S Sutiyono, S Muryanto, J Jamari, A P Bayuseno
Precipitation strategy of struvite-family crystals is presented in this paper to recover phosphate and potassium from a synthetic wastewater in the presence of citric acid at the elevated temperature. The crystal-forming solutions were prepared from crystals of for MgCl2 and NH4H2PO4 with a molar ratio of 1:1:1 for Mg(+2) , NH4(+) and PO4(-3), and the citric acid (C6H8O7) was prepared (in the amounts of 1.00 and 20.00 ppm) from citric acid crystals. was added. The Rietveld analysis of XRPD pattern confirmed a mixed product of struvite, struvite-(K) and newberyite crystallized at 30 (O)C in the absence of citric acid...
January 4, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28045371/the-synaptonemal-complex-has-liquid-crystalline-properties-and-spatially-regulates-meiotic-recombination-factors
#19
Ofer Rog, Simone Köhler, Abby F Dernburg
The synaptonemal complex (SC) is a polymer that spans ~100nm between paired homologous chromosomes during meiosis. Its striated, periodic appearance in electron micrographs led to the idea that transverse filaments within this structure 'crosslink' the axes of homologous chromosomes, stabilizing their pairing. SC proteins can also form polycomplexes, three-dimensional lattices that recapitulate the periodic structure of SCs but do not associate with chromosomes. Here we provide evidence that SCs and polycomplexes contain mobile subunits and that their assembly is promoted by weak hydrophobic interactions, indicative of a liquid crystalline phase...
January 3, 2017: ELife
https://www.readbyqxmd.com/read/28043917/stylet-biogenesis-in-bactericera-cockerelli-hemiptera-triozidae
#20
Joseph M Cicero
The discovery of 'Ca. Liberibacter solanacearum', causal agent of certain solanaceous and apiaceous crop diseases, inside the functional (intrastadial) and pharate stylet anatomy of the potato psyllid prompted elucidation of the mechanism of stylet replacement as a novel exit portal in the transmission pathway. In Hemiptera, presumptive (formative) stylets, secreted during consecutive pharate instars, replace functional stylets lost with the exuviae. In potato psyllids, each functional stylet has a hollow core filled with a cytology that extends out of the core to form a hemispherical aggregate of cells, the 'end-cap', somewhat resembling a golf ball on a tee...
December 30, 2016: Arthropod Structure & Development
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