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https://www.readbyqxmd.com/read/28098748/propagation-modeling-and-defending-of-a-mobile-sensor-worm-in-wireless-sensor-and-actuator-networks
#1
Tian Wang, Qun Wu, Sheng Wen, Yiqiao Cai, Hui Tian, Yonghong Chen, Baowei Wang
WSANs (Wireless Sensor and Actuator Networks) are derived from traditional wireless sensor networks by introducing mobile actuator elements. Previous studies indicated that mobile actuators can improve network performance in terms of data collection, energy supplementation, etc. However, according to our experimental simulations, the actuator's mobility also causes the sensor worm to spread faster if an attacker launches worm attacks on an actuator and compromises it successfully. Traditional worm propagation models and defense strategies did not consider the diffusion with a mobile worm carrier...
January 13, 2017: Sensors
https://www.readbyqxmd.com/read/28098745/effect-of-freeze-dried-allograft-bone-with-human-basic-fibroblast-growth-factor-containing-a-collagen-binding-domain-from-clostridium-histolyticum-collagenase-on-bone-formation-after-lumbar-posterolateral-fusion-surgery-in-rats
#2
Gen Inoue, Kentaro Uchida, Osamu Matsushita, Hisako Fujimaki, Wataru Saito, Masayuki Miyagi, Hiroyuki Sekiguchi, Nozomu Nishi, Seiji Ohtori, Mizuki Yogoro, Masashi Takaso
STUDY DESIGN: An experimental study. OBJECTIVE: To evaluate the effectiveness of freeze-dried bone allograft (FDBA) with basic fibroblast growth factor (bFGF) fused with the polycystic kidney disease domain (PKD) and the collagen-biding domain (CBD) of Clostridium histolyticum collagenase, for the acceleration of lumbar posterolateral fusion in rats. SUMMARY OF BACKGROUND DATA: Reports indicate bFGF is an effective growth factor with osteogenic potential for promoting bone regeneration, although its efficiency decreases rapidly following its diffusion in body fluid from the host site...
January 16, 2017: Spine
https://www.readbyqxmd.com/read/28098664/pancreatic-cancer-complicated-by-pancreatitis-demonstrated-on-fdg-pet-ct
#3
Grace Hennessy, Shankar Vamadevan, Han Loh, Chuong Bui, Ken Le, Robert Mansberg
A 73-year-old man was referred for F-FDG PET/CT study for staging of biopsy-proven pancreatic adenocarcinoma. The scan demonstrated focal intense FDG uptake in the pancreatic head, localizing the primary tumor. Additional moderate diffuse uptake was seen throughout the pancreas, suggestive of acute pancreatitis. Concurrent diagnostic CT showed diffuse pancreatic hypoenhancement consistent with edema. Serum lipase level was elevated, confirming a diagnosis of acute pancreatitis.
January 16, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28098557/length-dependent-flagellar-growth-of-vibrio-alginolyticus-revealed-by-real-time-fluorescent-imaging
#4
Meiting Chen, Ziyi Zhao, Jin Yang, Kai Peng, Matthew A B Baker, Fan Bai, Chien-Jung Lo
Bacterial flagella are extracellular filaments that drive swimming in bacteria. During its assembly, flagellins are transported unfolded through the central channel in the flagellum to the growing tip. Here we applied in vivo fluorescent imaging to monitor in real time the Vibrio alginolyticus polar flagella growth. The flagellar growth rate is found to be highly length-dependent. Initially, the flagellum grows at a constant rate (50nm/min) when shorter than 1500nm. The growth rate decays sharply when the flagellum grows longer...
January 18, 2017: ELife
https://www.readbyqxmd.com/read/28098549/diffuse-unilateral-subacute-neuroretinitis-caused-by-ancylostoma-hookworm
#5
Sven Poppert, Martin Heideking, Hansjürgen Agostini, Moritz Fritzenwanker, Nicole Wüppenhorst, Birgit Muntau, Philipp Henneke, Winfried Kern, Jürgen Krücken, Bernd Junker, Markus Hufnagel
Diffuse unilateral subacute neuroretinitis is an ocular infectious disease caused by several distinct nematodes. Definite identification of the involved nematodes is rarely achieved. We report on the molecular-based genetic identification of an Ancylostoma ceylanicum hookworm implicated in a case of diffuse unilateral subacute neuroretinitis in a child.
February 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28098510/dt-mri-microstructural-cortical-lesion-damage-does-not-explain-cognitive-impairment-in-ms
#6
Paolo Preziosa, Elisabetta Pagani, Maria E Morelli, Massimiliano Copetti, Vittorio Martinelli, Fiammetta Pirro, Andrea Falini, Giancarlo Comi, Massimo Filippi, Maria A Rocca
OBJECTIVE: We combined double inversion recovery (DIR) and diffusion tensor (DT) magnetic resonance imaging (MRI) to quantify the severity of cortical lesion (CL) microstructural tissue abnormalities in a large cohort of relapse-onset multiple sclerosis (MS) patients and its contribution to cognitive dysfunction. METHODS: DIR, DT, dual-echo, and three-dimensional (3D) T1-weighted scans were acquired from 149 MS patients and 40 controls. Cognitively impaired (CI) patients had ⩾2 abnormal neuropsychological tests...
January 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28098446/determination-of-carbonyl-compounds-in-cork-agglomerates-by-gdme-hplc-uv-identification-of-the-extracted-compounds-by-hplc-ms-ms
#7
Pedro Francisco Brandão, Rui Miguel Ramos, Paulo Joaquim Ferreira de Almeida, Jose António Rodrigues
A new approach is proposed for the extraction and determination of carbonyl compounds in solid samples, like wood or cork materials. Cork products are used as building materials due to its singular characteristics; however little is known about its aldehyde emission potential and content. Sample preparation was done by using a gas-diffusion microextraction (GDME) device, for the direct extraction of volatile aldehydes and derivatization with 2,4-dinitrophenylhydrazine. Analytical determination of the extracts was done by HPLC-UV, with detection at 360 nm...
January 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28098443/fe-cluster-pushing-electrons-to-n-doped-graphitic-layers-with-fe3c-fe-hybrid-nanostructure-to-enhance-o2-reduction-catalysis-of-zn-air-batteries
#8
Jie Yang, Jiangtao Hu, Mouyi Weng, Rui Tan, Lei-Lei Tian, Jinlong Yang, Joseph Amine, Jia-Xin Zheng, Haibiao Chen, Feng Pan
Non-noble metal catalysts with oxygen reduction reaction (ORR) performance comparable or even superior to that of Pt are extremely important for metal-air batteries and fuel cells. Here we report a simple and controllable strategy to synthesize Fe-cluster embedded in Fe3C nanoparticles (designated as Fe3C(Fe)) encased in nitrogen-doped Graphitic Layers (NDGL) with graphitic shells as a novel hybrid nanostructure as an effective ORR catalyst by directly pyrolyzing a mixture of Prussian blue (PB) and glucose...
January 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28098442/a-nasicon-type-mg0-5ti2-po4-3-negative-electrode-material-exhibits-different-electrochemical-energy-storage-mechanisms-in-na-ion-and-li-ion-batteries
#9
Yingying Zhao, Zhixuan Wei, Qiang Pang, Yingjin Wei, Yongmao Cai, Qiang Fu, Fei Du, Angelina Sarapulova, Helmut Ehrenberg, Bingbing Liu, Gang Chen
A Carbon-coated Mg0.5Ti2(PO4)3 polyanion material was prepared by the sol-gel method and then studied as the negative electrode materials for lithium-ion and sodium-ion batteries. The material showed a specific capacity of 268.6 mAh g-1 in the voltage window of 0.01-3.0 V vs. Na+/Na0. Due to the fast diffusion of Na+ in the NASICON framework, the material exhibited superior rate capability with a specific capacity of 94.4 mAh g-1 at a current density of 5A g-1. Additionally, 99.1 % capacity retention was achieved after 300 cycles, demonstrating excellent cycle stability...
January 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28098407/tumefactive-foreign-body-giant-cell-reaction-following-high-pressure-paint-injection-injury-a-case-report-and-review-of-literature
#10
Shakuntala H Mauzo, Michael Swaby, Michael Covinsky
High pressure paint injection injury is an uncommon but well-described injury. The histologic features of long-term paint injection injury with retained material are less recognized. A 46 year old male presented clinically as "recurrent giant cell tumor of tendon sheath". The right index finger demonstrated fusiform enlargement by a pigmented mass with diffuse infiltration into the soft tissue of the hand. Histologically the tumor showed multiple giant cells in a fibrotic stroma extending into the dermis. There were multiple types of foreign material including diffuse brown black pigment, weakly optically polarizing foreign material and white inclusions with a "train track" appearance...
January 18, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28098285/kb-po4-f-a-novel-acentric-deep-ultraviolet-material
#11
Ji-Hong Jiang, Lin-Chuan Zhang, Ya-Xi Huang, Zhi-Mei Sun, Yuanming Pan, Jin-Xiao Mi
Two challenges to grow KBe2BO3F2 (KBBF), the best known deep-ultraviolet nonlinear optical (NLO) material to date, are the limited crystal sizes and the use of a highly toxic element (Be). Herein we report on the discovery of a novel anhydrous non-centrosymmetric alkali fluorinated borophosphate KB(PO4)F (KBPF) featuring a cut-off wavelength of less than 200 nm and a large second-harmonic generation (SHG) effect similar to KH2PO4 (KDP), hence representing a new promising deep-ultraviolet NLO material. The KBPF crystals consisting of common elements can be grown using green and cost effective processes and do not show any detectable hygroscopicity...
January 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28098275/the-initial-stages-of-melting-of-graphene-between-4000-k-and-6000-k
#12
Eric Ganz, Ariel B Ganz, Li-Ming Yang, Matthew Dornfeld
Graphene and its analogues have some of the highest predicted melting points of any materials. Previous work estimated the melting temperature for freestanding graphene to be a remarkable 4510 K. However, this work relied on theoretical methods that do not accurately account for the role of bond breaking or complex bonding configurations in the melting process. Furthermore, experiments to verify these high melting points have been challenging. Practical applications of graphene and carbon nanotubes at high temperatures will require a detailed understanding of the behavior of these materials under these conditions...
January 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28098261/direct-observation-of-the-layer-by-layer-growth-of-zno-nanopillar-by-in-situ-high-resolution-transmission-electron-microscopy
#13
Xing Li, Shaobo Cheng, Shiqing Deng, Xianlong Wei, Jing Zhu, Qing Chen
Catalyst-free methods are important for the fabrication of pure nanowires (NWs). However, the growth mechanism remains elusive due to the lack of crucial information on the growth dynamics at atomic level. Here, the noncatalytic growth process of ZnO NWs is studied through in situ high resolution transmission electron microscopy. We observe the layer-by-layer growth of ZnO nanopillars along the polar [0001] direction under electron beam irradiation, while no growth is observed along the radial directions, indicating an anisotropic growth mechanism...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28098187/carbon-elimination-from-silicon-kerf-thermogravimetric-analysis-and-mechanistic-considerations
#14
Miguel Vazquez-Pufleau, Tandeep S Chadha, Gregory Yablonsky, Pratim Biswas
40% of ultrapure silicon is lost as kerf during slicing to produce wafers. Kerf is currently not being recycled due to engineering challenges and costs associated with removing its abundant impurities. Carbon left behind from the lubricant remains as one of the most difficult contaminants to remove in kerf without significant silicon oxidation. The present work enables to better understand the mechanism of carbon elimination in kerf which can aid the design of better processes for kef recycling and low cost photovoltaics...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28098180/an-aposymbiotic-primary-coral-polyp-counteracts-acidification-by-active-ph-regulation
#15
Yoshikazu Ohno, Akira Iguchi, Chuya Shinzato, Mayuri Inoue, Atsushi Suzuki, Kazuhiko Sakai, Takashi Nakamura
Corals build their skeletons using extracellular calcifying fluid located in the tissue-skeleton interface. However, the mechanism by which corals control the transport of calcium and other ions from seawater and the mechanism of constant alkalization of calcifying fluid are largely unknown. To address these questions, we performed direct pH imaging at calcification sites (subcalicoblastic medium, SCM) to visualize active pH upregulation in live aposymbiotic primary coral polyps treated with HCl-acidified seawater...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28098076/melting-of-large-pt-mgo-100-icosahedra
#16
Kevin Rossi, Tom Ellaby, Lauro Oliver Paz Borbon, Ivailo Atanasov, Luca Pavan, Francesca Baletto
On the basis of ab-initio calculations, we present a new parametrisation of the Vervisch-Mottet-Goniakowski (VMG) potential [Vervisch et al. Phys. Rev B24, 245411 (2002)] for modelling the oxide-metal interaction. Applying this model to mimic the finite temperature behaviour of large platinum icosahedra deposited on the pristine MgO(100), we find the nanoparticle undergoes two solid-solid transitions. At 650 K the ���squarisation��� of the interface layer, while a full reshaping towards a fcc architecture takes place above 950 K...
January 18, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28097678/aberrant-tyrosinase-expression-in-an-atypical-fibroxanthoma-a-case-report
#17
Amy Weiss, Vijay Vanchinathan, Eun Ji Kwon
Atypical fibroxanthoma (AFX) is a histologic mimicker of a variety of spindle cell neoplasms and careful microscopic and immunohistochemical evaluation is critical in establishing the correct diagnosis. Here we report the histologic and immunohistochemical work-up of a 1 cm nodule involving the left dorsal hand of a 66-year-old patient. Light microscopy revealed fascicles of spindled and pleomorphic cells within the dermis demonstrating increased mitotic activity occurring in the background of sun-damaged skin...
January 18, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28097524/pubovisceralis-muscle-fiber-architecture-determination-comparison-between-biomechanical-modeling-and-diffusion-tensor-imaging
#18
Sofia Brandão, Marco Parente, Elisabete Silva, Thuane Da Roza, Teresa Mascarenhas, João Leitão, João Cunha, Renato Natal Jorge, Rita Gouveia Nunes
Biomechanical analysis of pelvic floor dysfunction requires knowledge of certain biomechanical parameters, such as muscle fiber direction, in order to adequately model function. Magnetic resonance (MR) diffusion tensor imaging (DTI) provides an estimate of overall muscle fiber directionality based on the mathematical description of water diffusivity. This work aimed at evaluating the concurrence between pubovisceralis muscle fiber representations obtained from DTI, and the maximum principal stress lines obtained through the finite element method...
January 17, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28097508/preparation-and-evaluation-of-biopolymeric-nanoparticles-as-drug-delivery-system-in-effective-treatment-of-rheumatoid-arthritis
#19
Vijay Kumar, Ankita Leekha, Aakriti Tyagi, Ankur Kaul, Anil Kumar Mishra, Anita Kamra Verma
PURPOSE: The study purposes to evaluate nanocrystalline biopolymeric nanoparticles encapsulating methotrexate and dexamethasone with high biocompatibility, enhanced therapeutic efficacy and reduced toxicity. METHODS: Chitosan nanoparticles were prepared by ionic gelation, and Methotrexate (MTX) and Dexamethasone (DEX) were loaded during the preparation and screened for their in vitro efficacy in HEK and RAW264.7 cells, ex vivo and in vivo efficacy. RESULTS: FTIR confirmed the involvement of phosphoric group of sTPP with amine groups of chitosan and also role of hydrogen bonding involved in the preparation of MTXCHNP and DEXCHNP...
January 17, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28097503/blended-chitosan-paste-for-infection-prevention-preliminary-and-preclinical-evaluations
#20
Joel M Berretta, Jessica A Jennings, Harry S Courtney, Karen E Beenken, Mark S Smeltzer, Warren O Haggard
BACKGROUND: Local drug delivery devices offer a promising method for delivering vancomycin and amikacin for musculoskeletal wounds. However, current local delivery devices such as beads and sponges do not necessarily allow for full coverage of a wound surface with eluted antibiotics and do not address the need for reducing the antibiotic diffusion distance to help prevent contamination by bacteria or other microorganisms. We blended chitosan/polyethylene glycol (PEG) pastes/sponges to increase biocompatibility and improve antibiotic coverage within the wound...
January 17, 2017: Clinical Orthopaedics and related Research
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