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https://www.readbyqxmd.com/read/29022389/the-composition-and-metabolism-of-faecal-microbiota-is-specifically-modulated-by-different-dietary-polysaccharides-and-mucin-an-isothermal-microcalorimetry-study
#1
K Adamberg, K Kolk, M Jaagura, R Vilu, S Adamberg
The metabolic activity of colon microbiota is specifically affected by fibres with various monomer compositions, degree of polymerisation and branching. The supply of a variety of dietary fibres assures the diversity of gut microbial communities considered important for the well-being of the host. The aim of this study was to compare the impact of different oligo- and polysaccharides (galacto- and fructooligosaccharides, resistant starch, levan, inulin, arabinogalactan, xylan, pectin and chitin), and a glycoprotein mucin on the growth and metabolism of faecal microbiota in vitro by using isothermal microcalorimetry (IMC)...
October 12, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/28912659/power-time-curve-comparison-between-weightlifting-derivatives
#2
Timothy J Suchomel, Christopher J Sole
This study examined the power production differences between weightlifting derivatives through a comparison of power-time (P-t) curves. Thirteen resistance-trained males performed hang power clean (HPC), jump shrug (JS), and hang high pull (HHP) repetitions at relative loads of 30%, 45%, 65%, and 80% of their one repetition maximum (1RM) HPC. Relative peak power (PPRel), work (WRel), and P-t curves were compared. The JS produced greater PPRel than the HPC (p < 0.001, d = 2.53) and the HHP (p < 0.001, d = 2...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28904833/fluorination-of-vertically-aligned-carbon-nanotubes-from-cf4-plasma-chemistry-to-surface-functionalization
#3
Claudia Struzzi, Mattia Scardamaglia, Jean-François Colomer, Alberto Verdini, Luca Floreano, Rony Snyders, Carla Bittencourt
The surface chemistry of plasma fluorinated vertically aligned carbon nanotubes (vCNT) is correlated to the CF4 plasma chemical composition. The results obtained via FTIR and mass spectrometry are combined with the XPS and Raman analysis of the sample surface showing the dependence on different plasma parameters (power, time and distance from the plasma region) on the resulting fluorination. Photoemission and absorption spectroscopies are used to investigate the evolution of the electronic properties as a function of the fluorine content at the vCNT surface...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28869849/metabolic-pathway-and-role-of-individual-species-in-the-bacterial-consortium-for-biodegradation-of-azo-dye-a-biocalorimetric-investigation
#4
Bhuvanesh Kumar Shanmugam, Sivanesh Nanjan Easwaran, Rachita Lakra, Perinkulam Ravi Deepa, Surianarayanan Mahadevan
In this study, an attempt was made to investigate the functional role and metabolic behaviour of the monoculture (Staphylococcus lentus (SL), Bacillus flexus (BF) and Pseudomonas aeruginosa (PA)) in the bacterial biocenosis for biotransformation of an azo dye. The power-time profile obtained from consortia depicted three distinct peaks, which correlated well with the individual bacterial growth (PA > SL > BF), indicating the synergistic relation and division of labour in the biocenosis. The heat release pattern was used to identify the sequential behaviour of microbial consortia in real time...
August 29, 2017: Chemosphere
https://www.readbyqxmd.com/read/28837602/insights-on-correlation-dimension-from-dynamics-mapping-of-three-experimental-nonlinear-laser-systems
#5
Christopher J McMahon, Joshua P Toomey, Deb M Kane
BACKGROUND: We have analysed large data sets consisting of tens of thousands of time series from three Type B laser systems: a semiconductor laser in a photonic integrated chip, a semiconductor laser subject to optical feedback from a long free-space-external-cavity, and a solid-state laser subject to optical injection from a master laser. The lasers can deliver either constant, periodic, pulsed, or chaotic outputs when parameters such as the injection current and the level of external perturbation are varied...
2017: PloS One
https://www.readbyqxmd.com/read/28808259/combination-of-chemical-fingerprint-and-bioactivity-evaluation-to-explore-the-antibacterial-components-of-salvia-miltiorrhizae
#6
Wei-Jun Kong, Shan-Shan Zhang, Yan-Ling Zhao, Ming-Quan Wu, Ping Chen, Xiao-Ru Wu, Xin-Ping Ma, Wei-Ying Guo, Mei-Hua Yang
The aim of this study was to explore the possible antibacterial components of Salvia miltiorrhizae on Pseudomonas aeruginosa using a combination of chemical fingerprint and bioactivity evaluation. The chemical fingerprints of 32 batches of S. miltiorrhizae samples from different sources were developed using high-performance liquid chromatography with diode array detection, and then were evaluated by similarity analysis and hierarchical clustering analysis. Anti-P. aeruginosa activity was determined by microcalorimetry...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28763617/direct-laser-writing-of-%C3%AE-to-%C3%AE-phase-transformation-in-formamidinium-lead-iodide
#7
Julian A Steele, Haifeng Yuan, Collin Y X Tan, Masoumeh Keshavarz, Christian Steuwe, Maarten B J Roeffaers, Johan Hofkens
Organolead halide perovskites are increasingly considered for applications well beyond photovoltaics, for example, as the active regions within photonic devices. Herein, we report the direct laser writing (DLW: 458 nm cw-laser) of the formamidinium lead iodide (FAPbI3) yellow δ-phase into its high-temperature luminescent black α-phase, a remarkably easy and scalable approach that takes advantage of the material's susceptibility to transition under ambient conditions. Through the DLW of α-FAPbI3 tracks on δ-FAPbI3 single-crystal surfaces, the controlled and rapid microfabrication of highly luminescent structures exhibiting long-term phase stability is detailed, offering an avenue toward the prototyping of complex perovskite-based optical devices...
August 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28732946/effects-of-ultrasonic-treatment-on-the-maturation-of-zhenjiang-vinegar
#8
Zhenbin Wang, Tingting Li, Fengye Liu, Cunsheng Zhang, Haile Ma, Lin Wang, Shuai Zhao
High-quality vinegars are traditionally produced by aging them in barrels or bottles. However, these processes are very time-consuming. To accelerate of Zhenjiang vinegar maturation, the ultrasound was used to treat the steeped vinegar. Results showed that, the optimum ultrasonic power, time and ethanol addition for aging vinegar were determined to be 50W/100mL, 75min and 0.75% (V/V), respectively. Under the optimum experimental conditions, the total amino acid of fresh vinegar decreased from 1082.259mg/100mL to 871...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28686796/quesp-and-quest-revisited-fast-and-accurate-quantitative-cest-experiments
#9
Moritz Zaiss, Goran Angelovski, Eleni Demetriou, Michael T McMahon, Xavier Golay, Klaus Scheffler
PURPOSE: Chemical exchange saturation transfer (CEST) NMR or MRI experiments allow detection of low concentrated molecules with enhanced sensitivity via their proton exchange with the abundant water pool. Be it endogenous metabolites or exogenous contrast agents, an exact quantification of the actual exchange rate is required to design optimal pulse sequences and/or specific sensitive agents. METHODS: Refined analytical expressions allow deeper insight and improvement of accuracy for common quantification techniques...
July 7, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28640532/nonvolatile-perovskite-based-photomemory-with-a-multilevel-memory-behavior
#10
Jung-Yao Chen, Yu-Cheng Chiu, Yen-Ting Li, Chu-Chen Chueh, Wen-Chang Chen
Solution-processable organic-inorganic hybrid perovskite materials with a wealth of exotic semiconducting properties have appeared as the promising front-runners for next-generation electronic devices. Further, regarding its well photoresponsibility, various perovskite-based photosensing devices are prosperously developed in recent years. However, most exploited devices to date only transiently transduce the optical signals into electrical circuits while under illumination, which necessitates using additional converters to further store the output signals for recording the occurrence of light stimulation...
September 2017: Advanced Materials
https://www.readbyqxmd.com/read/28613926/cold-atmospheric-plasma-manipulation-of-proteins-in-food-systems
#11
Haniye Tolouie, Mohammad Amin Mohammadifar, Hamid Ghomi, Maryam Hashemi
Plasma processing has been getting a lot of attention in recent applications as a novel, eco-friendly, and highly efficient approach. Cold plasma has mostly been used to reduce microbial counts in foodstuff and biological materials, as well as in different levels of packaging, particularly in cases where there is thermal sensitivity. As it is a very recent application, the impact of cold plasma treatment has been studied on the protein structures of food and pharmaceutical systems, as well as in the packaging industry...
June 14, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/28605214/influence-of-reactive-strength-index-modified-on-force-and-power-time-curves
#12
John J McMahon, Paul A Jones, Timothy J Suchomel, Jason Lake, Paul Comfort
PURPOSE: The reactive strength index modified (RSImod) has been recently identified and validated as a method of monitoring countermovement jump (CMJ) performance. The kinetic and kinematic mechanisms that optimize a higher RSImod score are, however, currently unknown. The purpose of this study, therefore, was to compare entire CMJ force-, power-, velocity- and displacement-time curves (termed temporal phase analysis) of athletes who achieve high versus low RSImod scores. METHODS: Fifty-three professional male rugby league players performed three maximal effort CMJs on a force platform and variables of interest were calculated via forward dynamics...
June 12, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28497332/toxicity-of-nickel-to-soil-microbial-community-with-and-without-the-presence-of-its-mineral-collectors-a-calorimetric-approach
#13
Prudence Bararunyeretse, Hongbing Ji, Jun Yao
The toxicity of nickel and three of its main collectors, sodium isopropyl xanthate (SIPX), sodium ethyl xanthate (SEX), and potassium ethyl xanthate (PEX) to soil microbial activity, was analyzed, individually and as a binary combination of nickel and each of the collectors. The investigation was performed through the microcalorimetric analysis method. For the single chemicals, all power-time curves exhibited lag, exponential, stationary, and death phases of microbial growth. Different parameters exhibited a significant adverse effect of the analyzed chemicals on soil microbial activity, with a positive relationship between the inhibitory ratio and the chemical dose (p < 0...
June 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28337434/influence-of-power-delivery-timing-on-the-energetics-and-biomechanics-of-humans-wearing-a-hip-exoskeleton
#14
Aaron J Young, Jessica Foss, Hannah Gannon, Daniel P Ferris
A broad goal in the field of powered lower limb exoskeletons is to reduce the metabolic cost of walking. Ankle exoskeletons have successfully achieved this goal by correctly timing a plantarflexor torque during late stance phase. Hip exoskeletons have the potential to assist with both flexion and extension during walking gait, but the optimal timing for maximally reducing metabolic cost is unknown. The focus of our study was to determine the best assistance timing for applying hip assistance through a pneumatic exoskeleton on human subjects...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/28303551/antibacterial-evaluation-of-salvia-miltiorrhizae-on-escherichia-coli-by-microcalorimetry-coupled-with-chemometrics
#15
Guangyao Ying, Shanshan Zhang, Yuli Hu, Meihua Yang, Ping Chen, Xiaoru Wu, Weiying Guo, Weijun Kong
For seeking novel antibacterial agents with high efficacy and low toxicity to deal with drug resistance, the effects of Salvia miltiorrhizae from various sources on Escherichia coli were evaluated by microcalorimetry coupled with chemometrics. Firstly, the heat-flow power-time curves of E. coli growth affected by different S. miltiorrhizae samples were recorded. Then, some crucial quantitative thermo-kinetic parameters including growth rate constant, heat-flow power and heat output, etc. were obtained from theses curves and were further investigated by some powerful chemometric techniques including similarity analysis, multivariate analysis of variance, hierarchical clustering analysis and principle component analysis...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28278203/a-high-performance-seizure-detection-algorithm-based-on-discrete-wavelet-transform-dwt-and-eeg
#16
Duo Chen, Suiren Wan, Jing Xiang, Forrest Sheng Bao
In the past decade, Discrete Wavelet Transform (DWT), a powerful time-frequency tool, has been widely used in computer-aided signal analysis of epileptic electroencephalography (EEG), such as the detection of seizures. One of the important hurdles in the applications of DWT is the settings of DWT, which are chosen empirically or arbitrarily in previous works. The objective of this study aimed to develop a framework for automatically searching the optimal DWT settings to improve accuracy and to reduce computational cost of seizure detection...
2017: PloS One
https://www.readbyqxmd.com/read/28213179/the-dispersion-releaser-technology-is-an-effective-method-for-testing-drug-release-from-nanosized-drug-carriers
#17
Christine Janas, Marc-Philip Mast, Li Kirsamer, Carlo Angioni, Fiona Gao, Werner Mäntele, Jennifer Dressman, Matthias G Wacker
The dispersion releaser (DR) is a dialysis-based setup for the analysis of the drug release from nanosized drug carriers. It is mounted into dissolution apparatus2 of the United States Pharmacopoeia. The present study evaluated the DR technique investigating the drug release of the model compound flurbiprofen from drug solution and from nanoformulations composed of the drug and the polymer materials poly (lactic acid), poly (lactic-co-glycolic acid) or Eudragit(®)RSPO. The drug loaded nanocarriers ranged in size between 185...
February 14, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28147565/strategies-to-predict-radiated-sound-fields-from-foldable-miura-ori-based-transducers-for-acoustic-beamfolding
#18
Danielle T Lynd, Ryan L Harne
To bypass challenges of digital signal processing for acoustic beamforming applications, it is desirable to investigate repeatable mechanical approaches that accurately reposition transducers for real-time, simple guiding of acoustic energy. One promising approach is to create arrays configured on origami-inspired tessellated architectures. The low dimensionality, easy implementation, compactness, and use of straightforward folding to guide acoustic energies suggest that tessellated arrays may bypass limitations of conventional digital signal processing for beamforming...
January 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28115260/amorphization-within-the-tablet-using-microwave-irradiation-to-form-a-glass-solution-in-situ
#19
Maria Doreth, Murtadha Abdul Hussein, Petra A Priemel, Holger Grohganz, René Holm, Heidi Lopez de Diego, Thomas Rades, Korbinian Löbmann
In situ amorphization is a concept that allows to amorphize a given drug in its final dosage form right before administration. Hence, this approach can potentially be used to circumvent recrystallization issues that other amorphous formulation approaches are facing during storage. In this study, the feasibility of microwave irradiation to prepare amorphous solid dispersions (glass solutions) in situ was investigated. Indomethacin (IND) and polyvinylpyrrolidone K12 (PVP) were tableted at a 1:2 (w/w) ratio. In order to study the influence of moisture content and energy input on the degree of amorphization, tablet formulations were stored at different relative humidity (32, 43 and 54% RH) and subsequently microwaved using nine different power-time combinations up to a maximum energy input of 90kJ...
March 15, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27976395/the-mechanistic-basis-of-the-power-time-relationship-potential-role-of-the-group-iii-iv-muscle-afferents
#20
Thomas J Hureau, Ryan M Broxterman, Joshua C Weavil
No abstract text is available yet for this article.
December 15, 2016: Journal of Physiology
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