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https://www.readbyqxmd.com/read/29145500/estimation-of-stress-distribution-in-ferromagnetic-tensile-specimens-using-low-cost-eddy-current-stress-measurement-system-and-bp-neural-network
#1
Jianwei Li, Weimin Zhang, Weiqin Zeng, Guolong Chen, Zhongchao Qiu, Xinyuan Cao, Xuanyi Gao
Estimation of the stress distribution in ferromagnetic components is very important for evaluating the working status of mechanical equipment and implementing preventive maintenance. Eddy current testing technology is a promising method in this field because of its advantages of safety, no need of coupling agent, etc. In order to reduce the cost of eddy current stress measurement system, and obtain the stress distribution in ferromagnetic materials without scanning, a low cost eddy current stress measurement system based on Archimedes spiral planar coil was established, and a method based on BP neural network to obtain the stress distribution using the stress of several discrete test points was proposed...
2017: PloS One
https://www.readbyqxmd.com/read/29145218/endovascular-coil-treatment-of-a-coronary-artery-aneurysm-related-to-polyarteritis-nodosa
#2
Özgür Bayturan, Serdar Tarhan, Özge Çöpkıran, Fatih Düzgün, Uğur Kemal Tezcan
No abstract text is available yet for this article.
November 2017: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/29144529/driving-dynamic-colloidal-assembly-using-eccentric-self-propelled-colloids
#3
Zhan Ma, Qun-Li Lei, Ran Ni
Designing protocols to dynamically direct the self-assembly of colloidal particles has become an important direction in soft matter physics because of promising applications in the fabrication of dynamic responsive functional materials. Here, using computer simulations, we found that in the mixture of passive colloids and eccentric self-propelled active particles, when the eccentricity and self-propulsion of active particles are high enough, the eccentric active particles can push passive colloids to form a large dense dynamic cluster, and the system undergoes a novel dynamic demixing transition...
November 16, 2017: Soft Matter
https://www.readbyqxmd.com/read/29144380/a-passive-and-wireless-sensor-for-bone-plate-strain-monitoring
#4
Yisong Tan, Jiale Hu, Limin Ren, Jianhua Zhu, Jiaqi Yang, Di Liu
This paper reports on a sensor for monitoring bone plate strain in real time. The detected bone plate strain could be used for judging the healing state of fractures in patients. The sensor consists of a magnetoelastic material, which can be wirelessly connected and passively embedded. In order to verify the effectiveness of the sensor, a tibia-bone plate-screw (TBS) model was established using the finite element analysis method. A variation of the bone plate strain was obtained via this model. A goat hindquarter tibia was selected as the bone fracture model in the experiment...
November 16, 2017: Sensors
https://www.readbyqxmd.com/read/29143987/effect-of-body-temperature-on-the-pharmacokinetics-of-a-triarylmethyl-type-paramagnetic-contrast-agent-used-in-epr-oximetry
#5
Ken-Ichiro Matsumoto, Fuminori Hyodo, James B Mitchell, Murali C Krishna
PURPOSE: Pharmacokinetics of the tri[8-carboxy-2,2,6,6-tetrakis(2-hydroxymethyl)benzo[1,2-d:4,5-d']bis(1,3)dithio-4-yl]methyl radical (Oxo63) after a single bolus and/or continuous intravenous infusion was investigated in tumor-bearing C3H mice with or without body temperature control while under anesthesia. METHOD: The in vivo time course of Oxo63 in blood was measured using X-band electron paramagnetic resonance spectroscopy. Distribution of Oxo63 in normal muscle and tumor tissues was obtained using a surface coil resonator and a 700-MHz electron paramagnetic resonance spectrometer...
November 16, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29142623/simple-coiling-versus-stent-assisted-coiling-of-paraclinoid-aneurysms-radiological-outcome-in-a-single-center-study
#6
Soo Yeon Kim, Dong Sun Park, Hye Yin Park, Young Il Chun, Chang Taek Moon, Hong Gee Roh
Objective: Paraclinoid aneurysms are a group of aneurysms arising at the distal internal carotid artery. Due to a high incidence of small, wide-necked aneurysms in this zone, it is often challenging to achieve complete occlusion when solely using detachable coils, thus stent placement is often required. In the present study, we aimed to investigate the effect of stent placement in endovascular treatment of paraclinoid aneurysms. Methods: Data of 98 paraclinoid aneurysms treated by endovascular approach in our center from August 2005 to June 2016 were retrospectively reviewed...
November 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/29142590/birdcage-volume-coils-and-magnetic-resonance-imaging-a-simple-experiment-for-students
#7
Dwight E Vincent, Tianhao Wang, Thalia A K Magyar, Peni I Jacob, Richard Buist, Melanie Martin
Background: This article explains some simple experiments that can be used in undergraduate or graduate physics or biomedical engineering laboratory classes to learn how birdcage volume radiofrequency (RF) coils and magnetic resonance imaging (MRI) work. For a clear picture, and to do any quantitative MRI analysis, acquiring images with a high signal-to-noise ratio (SNR) is required. With a given MRI system at a given field strength, the only means to change the SNR using hardware is to change the RF coil used to collect the image...
2017: Journal of Biological Engineering
https://www.readbyqxmd.com/read/29142084/impaired-vestibular-responses-in-internuclear-ophthalmoplegia-association-and-dissociation
#8
Seo-Young Choi, Hyo-Jung Kim, Ji-Soo Kim
OBJECTIVE: To determine the role of the medial longitudinal fasciculus (MLF) in conveying vestibular signals. METHODS: In 10 patients with isolated acute unilateral internuclear ophthalmoplegia (INO) due to an acute stroke, we performed comprehensive vestibular evaluation using video-oculography, head impulse tests with a magnetic search coil technique, bithermal caloric tests, tests for the ocular tilt reaction, and measurements of subjective visual vertical and cervical and ocular vestibular evoked myogenic potentials (VEMPs)...
November 15, 2017: Neurology
https://www.readbyqxmd.com/read/29141528/engineering-clostridium-absonum-7%C3%AE-hydroxysteroid-dehydrogenase-for-enhancing-thermostability-based-on-flexible-site-and-%C3%AE-%C3%AE-g-prediction
#9
Deshuai Lou, Jun Tan, Liancai Zhu, Shunlin Ji, Shijin Tang, Kaiyi Yao, Jingxuan Han, Bochu Wang
Enhancing thermostability of the 7α-Hydroxysteroid dehydrogenases (7α-HSDHs) is beneficial to its industrial application broadly. Based on unfolding free energy changes (ΔΔG) prediction seven mutations of Clostridium absonum (CA) 7α-HSDH were selected and experimentally verified, and these mutants fitted three-state denaturation model well, among which S22L located in the αA possessed the greatest TmN→I increase (>8 °C). Mutants P124L, L197E, N171L and Y259E also became more stable than wild type CA 7α-HSDH with different ranges...
November 12, 2017: Protein and Peptide Letters
https://www.readbyqxmd.com/read/29140523/sequential-coiling-assisted-deployment-of-flow-diverter-for-treatment-of-fusiform-middle-cerebral-artery-aneurysms
#10
Abdulrahman Y Alturki, Philip G R Schmalz, Christopher S Ogilvy, Ajith J Thomas
BACKGROUND AND IMPORTANCE: Fusiform intracranial aneurysms remain challenging lesions to treat. These aneurysms have historically required bypass procedures or clip remodeling constructs for cure. Recently, endovascular specialists have reported experience with flow diversion for complex fusiform aneurysms of the vertebrobasilar system, with mixed results. Vascular anatomy for anterior circulation fusiform aneurysms may make these lesions more amenable to flow diversion and embolization procedures; however, published experience with these techniques is lacking...
November 11, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29138566/studies-on-the-use-of-recombinant-spider-silk-protein-polyvinyl-alcohol-electrospinning-membrane-as-wound-dressing
#11
Liang Zhao, Denglong Chen, Qinghua Yao, Min Li
A series of wound membranes of polyvinyl alcohol and recombinant spider silk protein (pNSR16) was prepared by electrospinning. The membrane was analyzed by scanning electron microscopy, atomic force microscopy, and Fourier transform infrared spectroscopy. The result showed that the three factors that affected average fiber diameter from high to low were, voltage, flow speed, and solidification distance; and the three factors that affected fiber uniformity from high to low were, flow speed, solidification distance, and voltage...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29137403/chicken-ccdc152-shares-an-nfyb-regulated-bidirectional-promoter-with-a-growth-hormone-receptor-antisense-transcript-and-inhibits-cells-proliferation-and-migration
#12
Shudai Lin, Wei Luo, Mingya Jiang, Wen Luo, Bahareldin Ali Abdalla, Qinghua Nie, Li Zhang, Xiquan Zhang
The chicken coiled-coil domain-containing protein 152 (CCDC152) recently has been identified as a novel one implicated in cell cycle regulation, cellular proliferation and migration by us. Here we demonstrate that CCDC152 is oriented in a head-to-head configuration with the antisense transcript of growth hormone receptor (GHR) gene. Through serial luciferase reporter assays, we firstly identified a minimal 102 bp intergenic region as a core bidirectional promoter to drive basal transcription in divergent orientations...
October 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/29136883/programmable-fow-injection-principle-methodology-and-application-for-trace-analysis-of-iron-in-a-sea-water-matrix
#13
Mariko Hatta, Christopher I Measures, Jaromir Jarda Ruzicka
Automation of reagent based assays by Flow Injection is based on sample processing, in which a sample flows continuously towards and through a detector for monitoring of its components. There are three drawbacks to using this approach. The constant continuous forward flow: continually consumes reagents and generates chemical waste and necessitates a compromise when optimizing the performance of the reagent based assay. The reason is that individual steps of an assay protocol, i.e., sample and reagent metering, mixing, incubation, monitoring and efficient washout are carried out most efficiently on different time scales and therefore at different flowrates...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136287/quantification-of-mri-visibility-and-artefacts-at-3t-of-liquid-fiducial-marker-in-a-pancreas-tissue-mimicking-phantom
#14
Sergej Schneider, Rasmus Irming Jølck, Esther Gera Cornelia Troost, Aswin Louis Hoffmann
PURPOSE: X-ray based position verification of the target volume in image-guided radiation therapy (IGRT) of patients with pancreatic ductal adenocarcinoma (PDAC) is currently performed on solid fiducial markers that are implanted under endoscopic ultrasonography. A new biodegradable liquid fiducial marker has recently been introduced. To assess its potential use for magnetic resonance imaging (MRI) guided photon or proton radiotherapy of PDAC, the MRI visibility and artefacts of this marker were quantified and compared against solid gold markers...
November 14, 2017: Medical Physics
https://www.readbyqxmd.com/read/29135996/clinicopathological-and-prognostic-value-of-transforming-acidic-coiled-coil-containing-protein-3-tacc3-expression-in-soft-tissue-sarcomas
#15
Kotaro Matsuda, Hiroaki Miyoshi, Koji Hiraoka, Shintaro Yokoyama, Toshiaki Haraguchi, Toshihiro Hashiguchi, Tetsuya Hamada, Naoto Shiba, Koichi Ohshima
Transforming acidic coiled-coil-containing protein 3 (TACC3), a microtubule regulator, is associated with various cancers. However, the relationship between TACC3 and soft tissue sarcomas (STS) remains unclear. We investigated the expression of TACC3 in 136 STS patient samples using immunohistochemical (IHC) staining, and the statistical associations between TACC3 expression and clinicopathological characteristics were evaluated. Additionally, the expression levels of the tumor suppressor p53 and of the cell proliferation marker Ki-67 were also assessed by IHC...
2017: PloS One
https://www.readbyqxmd.com/read/29135963/comprehensive-survey-on-improved-focality-and-penetration-depth-of-transcranial-magnetic-stimulation-employing-multi-coil-arrays
#16
Xile Wei, Yao Li, Meili Lu, Jiang Wang, Guosheng Yi
Multi-coil arrays applied in transcranial magnetic stimulation (TMS) are proposed to accurately stimulate brain tissues and modulate neural activities by an induced electric field (EF). Composed of numerous independently driven coils, a multi-coil array has alternative energizing strategies to evoke EFs targeting at different cerebral regions. To improve the locating resolution and the stimulating focality, we need to fully understand the variation properties of induced EFs and the quantitative control method of the spatial arrangement of activating coils, both of which unfortunately are still unclear...
November 14, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29135327/coil-localization-guided-video-assisted-thoracoscopic-surgery-for-lung-nodules
#17
Yu-Fei Fu, Miao Zhang, Wen-Bin Wu, Tao Wang
PURPOSE: To determine the clinical efficacy of preoperative coil localization-guided video-assisted thoracoscopic surgery (VATS) for lung nodules. MATERIALS AND METHODS: Between November 2015 and July 2017, 56 patients with lung nodules underwent coil localization-guided VATS procedure. The coil implantation was performed under the guidance of computed tomography (CT). The end tail of the coil remained above the visceral pleura. The target lung nodules were removed by VATS wedge resection...
November 14, 2017: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/29133943/randomly-polarised-beam-produced-by-magnetooptically-q-switched-laser
#18
Ryohei Morimoto, Taichi Goto, Takunori Taira, John Pritchard, Mani Mina, Hiroyuki Takagi, Yuichi Nakamura, Pang Boey Lim, Hironaga Uchida, Mitsuteru Inoue
Diode-pumped solid-state micro lasers are compact (centimetre-scale), highly stable, and efficient. Previously, we reported Q-switched lasers incorporating rare-earth substituted iron garnet (RIG) film. Here, the first demonstration of the magnetooptical (MO) Q-switch in an Nd:YAG laser cavity is performed. We fabricate a quasi-continuous-wave (QCW) diode-pumped Nd:YAG laser cavity, which is shortened to 10 mm in length and which contains an RIG film and a pair of small coils. This cavity yields a 1,064.58-nm-wavelength pulse with 25-ns duration and 1...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29133389/selective-killing-of-helicobacter-pylori-with-ph-responsive-helix-coil-conformation-transitionable-antimicrobial-polypeptides
#19
Menghua Xiong, Yan Bao, Xin Xu, Hua Wang, Zhiyuan Han, Zhiyu Wang, Yeqing Liu, Songyin Huang, Ziyuan Song, Jinjing Chen, Richard M Peek, Lichen Yin, Lin-Feng Chen, Jianjun Cheng
Current clinical treatment of Helicobacter pylori infection, the main etiological factor in the development of gastritis, gastric ulcers, and gastric carcinoma, requires a combination of at least two antibiotics and one proton pump inhibitor. However, such triple therapy suffers from progressively decreased therapeutic efficacy due to the drug resistance and undesired killing of the commensal bacteria due to poor selectivity. Here, we report the development of antimicrobial polypeptide-based monotherapy, which can specifically kill H...
November 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29133376/distinct-functions-of-starch-synthase-4-domains-in-starch-granule-formation
#20
Kuan-Jen Lu, Barbara Pfister, Camilla Jenny, Simona Eicke, Samuel C Zeeman
The formation of normal starch granules in Arabidopsis leaf chloroplasts requires STARCH SYNTHASE 4 (SS4). In plants lacking SS4, chloroplasts typically produce only one round granule rather than multiple lenticular granules. The mechanisms by which SS4 determines granule number and morphology are not understood. The N-terminal region of SS4 is unique among SS isoforms and contains several long coiled-coil motifs, typically implicated in protein-protein interactions. The C-terminal region contains the catalytic glucosyltransferase domains, which are widely conserved in plant SS and bacterial glycogen synthase (GS) isoforms...
November 13, 2017: Plant Physiology
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