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https://www.readbyqxmd.com/read/28104374/spectroscopic-characterisation-of-interaction-of-ferulic-acid-with-aldehyde-dehydrogenase-aldh
#1
Ayodele O Kolawole, Ruth J Agaba, Matthew O Oluwole
Interaction of pharmacological important phenolic, ferulic acid, with Aldehyde dehydrogenase (ALDH) at the simulative pH condition, was studied using spectroscopic approach. Ferulic acid caused a decrease in the fluorescence intensity formed from ALDH-ferulic acid complex resulting in mixed inhibition of ALDH activity (IC50=30.65μM). The intrinsic quenching was dynamic and induced altered conformation of ALDH and makes the protein less compact but might not unfold it. ALDH has two binding sites for ferulic acid at saturating concentrations having association constant of 1...
January 16, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28103433/baseline-extent-of-damage-predicts-spinal-radiographic-progression-in-korean-patients-with-ankylosing-spondylitis-treated-with-golimumab
#2
Jeong Seok Lee, Yeong Wook Song, Tae Hwan Kim, Won Tae Jung, Seung Geun Lee, Sung Hwan Park, Gwan Gyu Song, Dae Young Yu, Stephen Xu, Eun Young Lee
Background/Aims: For patients with ankylosing spondylitis (AS), golimumab has consistent efficacy in controlling disease activity over 5 years but its benefit in preventing radiographic progression was less clear at 4 years. To predict radiographic progression, we analyzed the baseline characteristics of AS patients in a Korean population. Methods: Sixty-eight Korean patients with AS participated in the phase 3, multicenter, randomized, placebo-controlled, double-blind trial (GO-RAISE) which has previously been described...
January 20, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28102852/anthropometric-trends-from-1997-to-2012-in-infants-born-at-%C3%A2-28-weeks-gestation-or-less
#3
N Wells, T A Stokes, K Ottolini, C H Olsen, A R Spitzer, C E Hunt
OBJECTIVE: Postnatal growth failure is common after preterm birth, in particular for infants born at ⩽28 weeks' gestation, but it is unknown if growth-to-term equivalent age has improved over the years as neonatal intensive care in general, and infant nutrition in particular, have improved. The objective of the study was to evaluate anthropometric trends at NICU discharge for infants born at ⩽28 weeks' gestation using a large national database. STUDY DESIGN: Analysis of growth in weight, length, head circumference and body mass index (kg m(2)) in 23 005 infants born in 1997 to 2012 who survived to neonatal intensive care unit discharge at ⩽41 weeks' postmenstrual age...
January 19, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/28101854/impurity-location-dependent-relaxation-dynamics-of-cu-cds-quantum-dots
#4
Dayeon Choi, Ji-Young Pyo, Du-Jeon Jang
Various types of 2% Cu-incorporated CdS (Cu:CdS) quantum dots (QDs) with very similar sizes have been prepared via a water soluble colloidal method. The locations of Cu impurities in CdS host nanocrystals have been controlled by adopting three different synthetic ways of doping, exchange, and adsorption to understand the impurity location-dependent relaxation dynamics of charge carriers. The oxidation state of incorporated Cu impurities has been found to be +1 and the band-gap energy of Cu:CdS QDs decreases as Cu2S forms at the surfaces of CdS QDs...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28100653/minocycline-blocks-glial-cell-activation-and-ventilatory-acclimatization-to-hypoxia
#5
Jennifer Ann Stokes, Tara Elizabeth Arbogast, Esteban A Moya, Zhenxing Fu, Frank L Powell
Ventilatory acclimatization to hypoxia (VAH) is the time-dependent increase in ventilation, which persists upon return to normoxia, and involves plasticity in both central nervous system respiratory centers and peripheral chemoreceptors. We investigated the role of glial cells in VAH in male Sprague Dawley rats using minocycline, an antibiotic that inhibits microglia activation and has anti-inflammatory properties, and barometric pressure plethysmography to measure ventilation. Rats received either minocycline (45mg/kg, i...
January 18, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28100074/antioxidant-capacity-and-identification-of-the-constituents-of-ethyl-acetate-fraction-from-rhus-verniciflua-stokes-by-hplc-ms
#6
Hongxia Chen, Chengzhang Wang, Hao Zhou, Ran Tao, Jianzhong Ye, Wenjun Li
Ethyl acetate fraction (EAF) from Rhus verniciflua Stokes is an important source of bioactive compounds. The aim of this study was the tentative identification and quantification of phenolic compounds, comparison of the phenolic structure-antioxidant activity relationships. Twelve compounds of EAF belonging to polyphenol types were detected by high performance liquid chromatography and analysed on line with negative ion electrospray ionisation tandem mass spectrometry, which were ethoxy 3-hydroxy benzoic acid, gallic acid (GA), 3,4-dihydroxy amygdalic acid, gallic acid cetyl ester, protocatechuic acid (PA), fustin, ethyl gallate (EG), garbanzol, fisetin, sulfuretin, butin and 3,7-dihydroxyflavanone-4'-rhamnoside...
January 18, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28099701/a-systematic-review-of-implementation-strategies-to-deliver-guidelines-on-obstetric-care-practice-in-low-and-middle-income-countries
#7
REVIEW
Mari Imamura, Lovney Kanguru, Suzanne Penfold, Tim Stokes, Janette Camosso-Stefinovic, Beth Shaw, Julia Hussein
BACKGROUND: Healthcare measures to prevent maternal deaths are well known. However, effective implementation of this knowledge to change practice remains a challenge. OBJECTIVES: To assess whether strategies to promote the use of guidelines can improve obstetric practices in low- and middle-income countries (LMICs). SEARCH STRATEGY: Electronic databases were searched up to February 7, 2014, using relevant terms for implementation strategies (e...
January 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28093412/beyond-bernoulli-improving-the-accuracy-and-precision-of-noninvasive-estimation-of-peak-pressure-drops
#8
Fabrizio Donati, Saul Myerson, Malenka M Bissell, Nicolas P Smith, Stefan Neubauer, Mark J Monaghan, David A Nordsletten, Pablo Lamata
BACKGROUND: Transvalvular peak pressure drops are routinely assessed noninvasively by echocardiography using the Bernoulli principle. However, the Bernoulli principle relies on several approximations that may not be appropriate, including that the majority of the pressure drop is because of the spatial acceleration of the blood flow, and the ejection jet is a single streamline (single peak velocity value). METHODS AND RESULTS: We assessed the accuracy of the Bernoulli principle to estimate the peak pressure drop at the aortic valve using 3-dimensional cardiovascular magnetic resonance flow data in 32 subjects...
January 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28092955/flow-optimization-in-vascular-networks
#9
Radu C Cascaval, Ciro D'Apice, Maria Pia D'Arienzo, Rosanna Manzo
The development of mathematical models for studying phenomena observed in vascular networks is very useful for its potential applications in medicine and physiology. Detailed 3D studies of flow in the arterial system based on the Navier-Stokes equations require high computational power, hence reduced models are often used, both for the constitutive laws and the spatial domain. In order to capture the major features of the phenomena under study, such as variations in arterial pressure and flow velocity, the resulting PDE models on networks require appropriate junction and boundary conditions...
June 1, 2017: Mathematical Biosciences and Engineering: MBE
https://www.readbyqxmd.com/read/28091649/optical-properties-of-trinuclear-metal-chalcogenolate-complexes-room-temperature-nir-fluorescence-in-cu2ti-sph-6-pph3-2
#10
Michael Kühn, Sergei Lebedkin, Florian Weigend, Andreas Eichhöfer
The optical properties of four isostructural trinuclear chalcogenolato bridged metal complexes [Cu2Sn(SPh)6(PPh3)2], [Cu2Sn(SePh)6(PPh3)2], [Ag2Sn(SPh)6(PPh3)2] and [Cu2Ti(SPh)6(PPh3)2] have been investigated by absorption and photoluminescence spectroscopy and time-dependent density functional theory (TDDFT) calculations. All copper-tin compounds demonstrate near-infrared (NIR) phosphorescence at ∼900-1100 nm in the solid state at low temperature, which is nearly absent at ambient temperature. Stokes shifts of these emissions are found to be unusually large with values of about 1...
January 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28089874/mathematical-modelling-of-cell-layer-growth-in-a-hollow-fibre-bioreactor
#11
Lloyd A C Chapman, Jonathan P Whiteley, Helen M Byrne, Sarah L Waters, Rebecca J Shipley
Generating autologous tissue grafts of a clinically useful volume requires efficient and controlled expansion of cell populations harvested from patients. Hollow fibre bioreactors show promise as cell expansion devices, owing to their potential for scale-up. However, further research is required to establish how to specify appropriate hollow fibre bioreactor operating conditions for expanding different cell types. In this study we develop a simple model for the growth of a cell layer seeded on the outer surface of a single fibre in a perfused hollow fibre bioreactor...
January 12, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28081075/dual-focus-coherent-anti-stokes-raman-scattering-microscopy-using-a-compact-two-beam-fiber-laser-source
#12
Fisseha Bekele Legesse, Tobias Meyer, Sandro Heuke, Thomas Gottschall, Torbjörn Pascher, Jens Limpert, Andreas Tünnermann, Michael Schmitt, Jürgen Popp
We have developed a dual-focus coherent anti-Stokes Raman scattering (CARS) microscope based on a dual output, compact fiber laser source. The underlying concepts of time-multiplexed, two-beam scanning and demultiplexed detection that we already employed for second-harmonic generation are here naturally extended for CARS microscopy. The layout of a robust, all-fiber laser source was reconfigured to provide two outputs, each containing the two colors necessary for the CARS process. The utilization of the design for simultaneously imaging two laterally or axially separated fields of view and, thus, inherently speeding up the image acquisition process, is demonstrated on human artery tissue samples...
January 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28078195/using-voice-coils-to-actuate-modular-soft-robots-wormbot-an-example
#13
Markus P Nemitz, Pavel Mihaylov, Thomas W Barraclough, Dylan Ross, Adam A Stokes
In this study, we present a modular worm-like robot, which utilizes voice coils as a new paradigm in soft robot actuation. Drive electronics are incorporated into the actuators, providing a significant improvement in self-sufficiency when compared with existing soft robot actuation modes such as pneumatics or hydraulics. The body plan of this robot is inspired by the phylum Annelida and consists of three-dimensional printed voice coil actuators, which are connected by flexible silicone membranes. Each electromagnetic actuator engages with its neighbor to compress or extend the membrane of each segment, and the sequence in which they are actuated results in an earthworm-inspired peristaltic motion...
December 1, 2016: Soft Robotics
https://www.readbyqxmd.com/read/28076728/bringing-competencies-closer-to-day-to-day-clinical-work-through-entrustable-professional-activities
#14
Olle Ten Cate, Stephen Tobin, Marie-Louise Stokes
No abstract text is available yet for this article.
January 16, 2017: Medical Journal of Australia
https://www.readbyqxmd.com/read/28073310/in-memoriam-linda-marie-wayland-pote
#15
Andrea S Varela-Stokes
No abstract text is available yet for this article.
January 10, 2017: Journal of Parasitology
https://www.readbyqxmd.com/read/28070795/td-dft-study-of-absorption-and-emission-spectra-of-2-2-aminophenyl-benzothiazole-derivatives-in-water
#16
Natthaporn Manojai, Rathawat Daengngern, Khanittha Kerdpol, Nawee Kungwan, Chanisorn Ngaojampa
Reduction of aromatic azides to amines is an important property of hydrogen sulphide (H2S) which is useful in fluorescence microscopy and H2S probing in cells. The aim of this work is to study the substituent effect on the absorption and emission spectra of 2-(2'-aminophenyl)benzothiazole (APBT) in order to design APBT derivatives for the use of H2S detection. Absorption and emission spectra of APBT derivatives in aqueous environment were calculated using density functional theory (DFT) and time-dependent DFT (TD-DFT) at B3LYP/6-311+G(d,p) level...
January 9, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/28070683/do-we-have-the-right-proms-for-measuring-outcomes-in-lumbar-spinal-surgery
#17
REVIEW
O M Stokes, A A Cole, L M Breakwell, A J Lloyd, C M Leonard, M Grevitt
PURPOSE: Patient-reported outcome measures (PROMs) have become an important part of routine auditing of outcomes in spinal surgery in the UK. PROMs can be used to help assess the quality of care provided by surgical units by determining the comparative health status of patients, before and after surgery. This study was designed to review the PROMs used to assess outcomes in spinal surgery and to determine if they are fit for the purpose. METHODS: A systematic literature search was undertaken to identify studies that reported PROMs data following lumbar spinal surgery...
January 9, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28070587/highly-selective-colorimetric-detection-of-cyanide-anions-in-aqueous-media-by-triphenylamine-and-phenanthro-9-10-d-imidazole-based-probes
#18
Arockiam Jesin Beneto, Ayyanar Siva
Two novel fluorescent probes based on triphenylamine (TPC) and phenanthro(9,10-d-imidazole) (PITP) have been synthesized and studied as cyanide selective indicators in aqueous media. Complete colour bleaching was observed due to the nucleophilic addition of cyanide to the 2-vinylmalononitrile of TPC, which results in the disruption of the extended conjugation and turns off the intramolecular charge transfer (ICT) process. Furthermore, a visible color change was observed with a large Stokes shift (108 nm) upon the addition of cyanide anions to PITP, due to the formation of hydrogen bonding between the CN(-) anion and -NH of PITP, which increased the electron density on the donor moiety and induced strong ICT...
January 10, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28070079/improvement-of-spatial-resolution-for-nonlinear-raman-microscopy-by-spatial-light-modulation
#19
Motohiro Banno, Konosuke Onda, Hiroharu Yui
The development of a stimulated Raman scattering (SRS) microscope with a wavefront modulation unit is presented. In the apparatus, two beams for introducing the SRS process were focused into the sample with an objective lens. In the pathway of the Stokes beam, which is one of the two incident beams, a spatial light modulator (SLM) was located. Using the SLM, the wavefront of the Stokes beam was modulated to make the shape of the focal point a concentric circular pattern. By this spot shaping technique, the area where the SRS signal generates is restricted...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28069230/acoustic-microbubble-dynamics-with-viscous-effects
#20
Kawa Manmi, Qianxi Wang
Microbubble dynamics subject to ultrasound are associated with important applications in biomedical ultrasonics, sonochemistry and cavitation cleaning. The viscous effects in this phenomenon is essential since the Reynolds number Re associated is about O(10). The flow field is characterized as being an irrotational flow in the bulk volume but with a thin vorticity layer at the bubble surface. This paper investigates the phenomenon using the boundary integral method based on the viscous potential flow theory...
May 2017: Ultrasonics Sonochemistry
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