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https://www.readbyqxmd.com/read/29684765/application-of-maldi-tof-ms-for-the-subtyping-of-arcobacter-butzleri-strains-and-comparison-with-their-mlst-and-pfge-types
#1
Federica Giacometti, Silvia Piva, Katleen Vranckx, Katrien De Bruyne, Ilenia Drigo, Alex Lucchi, Gerardo Manfreda, Andrea Serraino
For the first time, this study evaluated the use of MALDI-TOF as a typing tool for Arcobacter butzleri. A total of 104 A. butzleri strains isolated from different sources in an artisanal dairy plant in Italy were identified and typed using MALDI-TOF and compared with their multilocus sequence typing (MLST) and pulsed field gel electrophoresis (PFGE) profiles found in previous studies. MALDI-TOF correctly identified all the isolates to species level. No clearly delineated clusters appeared on dendrograms based on either the complete spectra or the significant peaks, but nine clusters were defined using the cophenetic correlation...
April 16, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29684752/dynamic-semantic-cognition-characterising-coherent-and-controlled-conceptual-retrieval-through-time-using-magnetoencephalography-and-chronometric-transcranial-magnetic-stimulation
#2
Catarina Teige, Giovanna Mollo, Rebecca Millman, Nicola Savill, Jonathan Smallwood, Piers L Cornelissen, Elizabeth Jefferies
Distinct neural processes are thought to support the retrieval of semantic information that is (i) coherent with strongly-encoded aspects of knowledge, and (ii) non-dominant yet relevant for the current task or context. While the brain regions that support readily coherent and more controlled patterns of semantic retrieval are relatively well-characterised, the temporal dynamics of these processes are not well-understood. This study used magnetoencephalography (MEG) and dual-pulse chronometric transcranial magnetic stimulation (cTMS) in two separate experiments to examine temporal dynamics during the retrieval of strong and weak associations...
March 30, 2018: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29684749/aqueous-polythiophene-electrosynthesis-a-new-route-to-an-efficient-electrode-coupling-of-pqq-dependent-glucose-dehydrogenase-for-sensing-and-bioenergetic-applications
#3
Giovanni Fusco, Gero Göbel, Robertino Zanoni, Maria Paola Bracciale, Gabriele Favero, Franco Mazzei, Fred Lisdat
In this study, polythiophene copolymers have been used as modifier for electrode surfaces in order to allow the immobilization of active pyrroloquinoline quinone dependent glucose dehydrogenase (PQQ-GDH) and to simultaneously improve the direct electrical connection of the enzyme with the electrode. Polymer films are electrosynthesized in aqueous solution without the need of surfactants onto carbon nanotubes modified gold electrodes from mixtures of 3-thiopheneacetic acid (ThCH2 CO2 H) and 3-methoxythiophene (ThOCH3 ) using a potentiostatic pulse method...
April 7, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29684717/photobiomodulation-mechanisms-in-the-kinetics-of-the-wound-healing-process-in-rats
#4
A N Otterço, A L Andrade, P Brassolatti, K N Z Pinto, H S S Araújo, N A Parizotto
OBJECTIVES: The healing process of cutaneous lesions is considered a complex event divided into distinct and overlapping phases, which responds satisfactorily to photobiomodulation (PBM). PBM is indicated as a therapeutic resource capable of assisting tissue repair. The present study aimed to analyze the kinetics of cutaneous wounds healing process after application of the GaAlAs laser for treating wounds on the dorsum of rats. MATERIALS AND METHODS: This study was approved by the Animal Ethics Committee of UFSCar...
April 8, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29684662/release-of-endothelial-microparticles-in-patients-with-arterial-hypertension-hypertensive-emergencies-and-catheter-related-injury
#5
Roberto Sansone, Maximilian Baaken, Patrick Horn, Dominik Schuler, Ralf Westenfeld, Nicolas Amabile, Malte Kelm, Christian Heiss
BACKGROUND AND AIMS: Circulating endothelial microparticles (EMPs) are increased in arterial hypertension. The role of physicomechanical factors that may induce EMP release in vivo is still unknown. We studied the relationship of EMPs and physicomechanical factors in stable arterial hypertension and hypertensive emergencies, and investigated the pattern of EMP release after mechanical endothelial injury. METHODS: In a pilot study, 41 subjects (50% hypertensives) were recruited...
April 12, 2018: Atherosclerosis
https://www.readbyqxmd.com/read/29684625/nanomechanics-and-ultrastructure-of-the-internal-mammary-artery-adventitia-in-patients-with-low-and-high-pulse-wave-velocity
#6
Zhuo Chang, Paolo Paoletti, Steve D Barrett, Ya Hua Chim, Eva Caamaño-Gutiérrez, Maria Lyck Hansen, Hans Christian Beck, Lars Melholt Rasmussen, Riaz Akhtar
The collagen-rich adventitia is the outermost arterial layer and plays an important biomechanical and physiological role in normal vessel function. While there has been a lot of effort to understand the role of the medial layer on arterial biomechanics, the adventitia has received less attention. In this study, we hypothesized that different ultrastructural and nanomechanical properties would be exhibited in the adventitia of the internal mammary artery (IMA) in patients with a low degree of arterial stiffening as compared to those with a high degree of arterial stiffening...
April 20, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29684119/aortic-stiffness-in-adolescent-turner-and-marfan-syndrome-patients
#7
Michal Schäfer, Lorna P Browne, Uyen Truong, James J Jaggers, Max B Mitchell, Ladonna Malone, Gareth Morgan, Kathryn Chatfield, Daniel McLennan, Harma Turbendian, Danial Vargas, Brian Fonseca, Michael DiMaria, Anar Shah, Margaret P Ivy, Alex J Barker, Kendall S Hunter, Neil Wilson, D Dunbar Ivy, David N Campbell
OBJECTIVES: Turner syndrome (TS) and Marfan syndrome (MFS) are partially characterized by aortopathies with a risk of developing severe aortic dilation, stiffness and consequent dissection and aneurysm formation. The incidence of a bicuspid aortic valve (BAV) is also increased in TS. We investigated aortic stiffness in teenage TS and MFS patients and evaluated to what degree stiffness in TS patients is augmented by the presence of a BAV. METHODS: Fifty-seven patients with TS (n = 37) and MFS (n = 20), as well as 22 controls with similar age and size distribution underwent evaluation of thoracic aortic stiffness using phase-contrast magnetic resonance imaging...
April 19, 2018: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29684105/aortic-pulse-pressure-does-not-adequately-index-cardiovascular-risk-factor-related-changes-in-aortic-stiffness-and-forward-wave-pressure
#8
Tshegofatso H Motau, Gavin R Norton, Pinhas Sareli, Angela J Woodiwiss
Background: Through the impact of conventional risk factors on arteries, several changes in aortic function contribute to cardiovascular events. It is nevertheless uncertain whether these effects are accurately reflected by changes in central aortic pulse pressure (PPc). We therefore aimed to determine the extent to which relations between modifiable risk factors and aortic function translate into increases in PPc. Methods: In 1232 black South Africans from the South West Township (SOWETO) of Johannesburg, we determined risk factors and aortic function from carotid-femoral pulse wave velocity (PWV) and aortic PPc, forward (Pf) and reflected (backward-Pb) wave pressures (applanation tonometry and SphygmoCor software)...
April 19, 2018: American Journal of Hypertension
https://www.readbyqxmd.com/read/29684047/effect-of-hypnotic-suggestion-on-knee-extensor-neuromuscular-properties-in-resting-and-fatigued-states
#9
Naiandra Dittrich, Daniel Agostino, Roberta Antonini Philippe, Luiz Guilherme A Guglielmo, Nicolas Place
PURPOSE: The aim of this study was to investigate whether hypnotic suggestions can alter knee extensor neuromuscular function at rest and during exercise. METHODS: Thirteen healthy volunteers (8 men and 5 women, 27 ± 3 years old) took part in this counterbalanced, crossover study including two experimental (hypnosis and control) sessions. Knee extensor neuromuscular function was tested before and after hypnosis suggestion by using a combination of voluntary contraction, transcutaneous femoral nerve electrical stimulation and transcranial magnetic stimulation (TMS)...
2018: PloS One
https://www.readbyqxmd.com/read/29683540/blood-pressure-levels-in-the-acute-phase-after-intracerebral-haemorrhage-are-associated-with-mortality-in-young-adults
#10
Satu Mustanoja, Jukka Putaala, Riku-Jaakko Koivunen, Ida Surakka, Turgut Tatlisumak
BACKGROUND: Blood pressure (BP) levels in acute Intracerebral haemorrhage (ICH) and mortality have not been thoroughly studied in the young. METHODS: The relationship between BP and mortality was assessed in consecutive first-ever, non-traumatic acute ICH patients ≤50 years of age, enrolled in the Helsinki ICH Young Study. BP parameters included systolic BP (SBP), diastolic BP (DBP), mean arterial pressure (MAP) and pulse pressure (SBP-DBP) at admission and 24 hours, and delta (admission-24 hour) BP parameters...
April 23, 2018: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29683363/cardiovascular-autonomic-response-to-orthostatic-stress-under-hypoxia-in-patients-with-spinal-cord-injury
#11
Shu-Chun Huang, Kuo-Cheng Liu, Alice M K Wong, Shih-Chieh Chang, Jong-Shyan Wang
Huang, Shu-Chun, Kuo-Cheng Liu, Alice M.K. Wong, Shih-Chieh Chang, and Jong-Shyan Wang. Cardiovascular autonomic response to orthostatic stress under hypoxia in patients with spinal cord injury. High Alt Med Biol. 00:000-000, 2018. AIMS: Determining whether systemic hypoxia aggravates the severity of autonomic cardiovascular dysfunction in orthostatic stress among patients with spinal cord injuries (SCIs). METHODS: Twenty-four male patients with chronic SCI whose neurological levels were above T6 were recruited...
April 23, 2018: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/29683159/morphology-controlled-epitaxial-vanadium-dioxide-low-dimensional-structures-the-delicate-effects-on-the-phase-transition-behaviors
#12
W M Xiong, Jian Shao, Y Q Zhang, Yun Chen, X Y Zhang, W J Chen, Yue Zheng
As an important strongly correlated electron material, VO2 undergoes a metal-insulator transition (MIT) accompanied by a huge change of several orders of magnitude in conductance and transmittance. The MIT behavior can be controlled by low-dimensional structures (LDSs) and the interaction between LDSs and substrates. Consequently, fabricating the LDSs and understanding the phase transition behaviors have great significance for the investigation of fundamental properties and applications. Using the pulsed laser deposition technique, we fabricate abundant LDSs (i...
April 23, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29683155/nanoscale-thermal-diffusion-during-the-laser-interference-ablation-using-femto-pico-and-nanosecond-pulses-in-silicon
#13
Mindaugas Gedvilas, Simonas Indrišiūnas, Bogdan Voisiat, Evaldas Stankevičius, Algirdas Selskis, Gediminas Račiukaitis
Laser interference ablation in silicon using femto-, pico-, and nanosecond pulses was investigated. The experimental and computational results provide information about nanoscale thermal diffusion during the ultra-short laser-matter interaction. The temperature modulation depth was introduced as a parameter for quality assessment of laser interference ablation. Based on the experiments and calculations, a new semi-empirical formula which combines the interference period with the laser pulse duration, the thermal modulation depth and the thermal diffusivity of the material was derived...
April 23, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29682769/biophysical-measurement-of-red-blood-cells-by-lab-on-pcb-chip
#14
Ying Zhao, Wengeng Zhang
Microfluidic impedance pulse sensor has emerged as easy-handling and low-cost platform in the electrical analysis of biological cells. In the conventional method, impedance sensor demanded expensively patterning metal electrodes on the substrate, which are directly in touch with electrolytes in order to measure the microfluidic channel impedance change. In this letter, a cost-effective microfluidic impedance sensor building upon a dielectric film coated printed circuit board is introduced. Impedance electrodes are protected by a dielectric film layer from electrochemical erosion between electrodes and electrolyte...
April 22, 2018: Electrophoresis
https://www.readbyqxmd.com/read/29682699/effects-of-continuous-positive-airway-pressure-on-cardiovascular-biomarkers-in-patients-with-obstructive-sleep-apnea-a-meta-analysis-of-randomized-controlled-trials
#15
Yu Ning, Tian-Song Zhang, Wan-Wan Wen, Kun Li, Yun-Xiao Yang, Yan-Wen Qin, Hui-Na Zhang, Yun-Hui Du, Lin-Yi Li, Song Yang, Yun-Yun Yang, Miao-Miao Zhu, Xiao-Lu Jiao, Yan Zhang, Ming Zhang, Yong-Xiang Wei
PURPOSE: Obstructive sleep apnea (OSA) is associated with increased levels of systemic inflammatory markers, increased arterial stiffness, and endothelial dysfunction, which may lead to increased cardiovascular risk. We aimed to quantify the effects of continuous positive airway pressure (CPAP) on cardiovascular biomarkers and to establish predictors of response to CPAP. METHODS: We searched PubMed and the Cochrane Library from inception to May 31, 2017. Randomized controlled trials (RCTs) assessing the efficacy of CPAP on high-sensitivity C-reactive protein (hs-CRP), interleukin 6 (IL-6), tumor necrosis factor- alpha (TNF-α), augmentation index (AIx), pulse wave velocity (PWV), and flow-mediated dilatation (FMD) in patients with OSA were selected by consensus...
April 22, 2018: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/29682663/carrier-recombination-and-plasmonic-emission-channels-in-metallic-photoluminescence
#16
Jiyong Wang, Emre Gürdal, Anke Horneber, Simon Dickreuter, Sergei Kostcheev, Alfred J Meixner, Monika Fleischer, Pierre-Michel Adam, Dai Zhang
We systematically investigate the metallic photoluminescence (MPL) emitted from plasmonic nanoparticles (NPs) upon excitation with ultrafast laser pulses using a scanning confocal optical microscope (SCOM). By comparing the emission spectra of Au NPs of varying dimensions with the corresponding dark-field scattering spectra, indications are found that MPL encompasses two emission channels: the particle plasmons (PPs) and the electron-hole (e-h) pair recombination. The plasmons can be interpreted to play a twofold role: in the excitation process they provide the local field enhancement, and in the emission process they offer extra radiation channels...
April 23, 2018: Nanoscale
https://www.readbyqxmd.com/read/29682539/effect-of-kisspeptin-on-the-developmental-competence-and-early-transcript-expression-in-porcine-oocytes-parthenogenetically-activated-with-different-methods
#17
Islam M Saadeldin, Ayman Abdel-Aziz Swelum, Aaser M Abdelazim, Essam A Almadaly
Recent studies showed the modulatory effect of kisspeptin (KP) on calcium waves through the cell membrane and inside the cell. Spermatozoon can induce similar ooplasmic calcium oscillations at fertilization to trigger meiosis II. Here, we evaluated the effect of KP supplementation with 6-dimethylaminopurine (6-DMAP) for 4 h on embryonic development after oocyte activation with single electric pulse, 5 µ M ionomycin, or 8% ethanol. Compared to control nonsupplemented groups, KP significantly improved embryo developmental competence electric- and ethanol-activated oocytes in terms of cleavage (75...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29682469/conservative-management-versus-endovascular-or-open-surgery-in-the-spectrum-of-type-b-aortic-dissection
#18
Xun Yuan, Andreas Mitsis, Mohammed Ghonem, Ilias Iakovakis, Christoph A Nienaber
Background: Type B aortic dissection is a life-threatening acute aortic condition often with acute ischemic signs or symptoms. With initial management focusing on alleviating malperfusion and pain, and avoiding propagation of dissection or rupture both systolic blood and pulse pressure should be reduced initially by an aggressive medical approach. In the setting of persistent signs of complications endovascular strategies have replaced open surgery and led to a fourfold increase in early survival and better long-term outcomes...
2018: Journal of Visualized Surgery
https://www.readbyqxmd.com/read/29682321/use-of-biomedical-photonics-in-gynecological-surgery-a-uterine-transplantation-model
#19
Srdjan Saso, Neil T Clancy, Benjamin P Jones, Timothy Bracewell-Milnes, Maya Al-Memar, Eleanor M Cannon, Simran Ahluwalia, Joseph Yazbek, Meen-Yau Thum, Tom Bourne, Daniel S Elson, James Richard Smith, Sadaf Ghaem-Maghami
Aim: Uterine transplantation (UTx) has been proposed as a treatment for permanent absolute uterine factor infertility. The study aims were to compare pulse oximetry and multispectral imaging (MSI), for intraoperative tracking of uterine oxygen saturation in animal UTx models (rabbit and sheep). Results/methodology: Imaging results confirmed the re-establishment of adequate perfusion in the transplanted organ after surgery. Comparison of oxygen saturation   values between the pre-UTx donor and post-UTx recipient, and pre-UTx and post-UTx recipient reveals a statistically significant decrease in saturation levels post-UTx...
April 2018: Future Science OA
https://www.readbyqxmd.com/read/29682151/ecohydrological-index-native-fish-and-climate-trends-and-relationships-in-the-kansas-river-basin
#20
Sumathy Sinnathamby, Kyle R Douglas-Mankin, Muluken E Muche, Stacy L Hutchinson, Aavudai Anandhi
This study quantified climatological and hydrological trends and relationships to presence and distribution of two native aquatic species in the Kansas River Basin over the past half-century. Trend analyses were applied to indicators of hydrologic alteration (IHAs) at 34 streamgages over a 50-year period (1962-2012). Results showed a significant negative trend in annual streamflow for 10 of 12 western streamgages (up to -7.65 mm/50 yr) and smaller negative trends for most other streamgages. Significant negative trends in western Basin streamflow were more widespread in summer (12 stations) than winter or spring (6 stations)...
2018: Ecohydrology: Ecosystems, Land and Water Process Interactions, Ecohydrogeomorphology
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