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https://www.readbyqxmd.com/read/29458178/direct-convergence-of-light-and-auxin-signaling-pathways-in-arabidopsis
#1
Enamul Huq
No abstract text is available yet for this article.
February 16, 2018: Molecular Plant
https://www.readbyqxmd.com/read/29458149/age-dependent-oxidation-of-extracellular-cysteine-cystine-redox-state-e-h-cys-cyss-in-mouse-lung-fibroblasts-is-mediated-by-a-decline-in-slc7a11-expression
#2
Yuxuan Zheng, Jeffrey D Ritzenthaler, Tom J Burke, Javier Otero, Jesse Roman, Walter H Watson
Aging is associated with progressive oxidation of the extracellular environment. The redox state of human plasma, defined by the concentrations of cysteine (Cys) and cystine (CySS), becomes more oxidized as we age. Recently, we showed that fibroblasts isolated from the lungs of young and old mice retain this differential phenotype; old cells produce and maintain a more oxidizing extracellular redox potential (Eh (Cys/CySS)) than young cells. Microarray analysis identified down-regulation of Slc7a11, the light subunit of the CySS/glutamate transporter, as a potential mediator of age-related oxidation in these cells...
February 16, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29458148/untimely-oxidative-stress-in-%C3%AE-cells-leads-to-diabetes-role-of-circadian-clock-in-%C3%AE-cell-function
#3
REVIEW
J Lee, K Ma, M Moulik, V Yechoor
Diabetes results from a loss of β-cell function. With the number of people with diabetes reaching epidemic proportions globally, understanding mechanisms that are contributing to this increasing prevalence is critical. One such factor has been circadian disruption, with shift-work, light pollution, jet-lag, increased screen time, all acting as potential contributory factors. Though circadian disruption has been epidemiologically associated with diabetes and other metabolic disorders for many decades, it is only recently that there has been a better understanding of the underlying molecular mechanisms...
February 16, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29458138/pharmacokinetic-and-pharmacodynamic-evaluation-of-5-methoxy-2-aminoindane-meai-a-new-binge-mitigating-agent
#4
Jakob A Shimshoni, Eyal Sobol, Ezekiel Golan, Yulius Ben Ari, Orit Gal
5-Methoxy-2-aminoindane (MEAI) is a novel psychoactive aminoindane derivative, exerting euphoric, alcohol-like tipsy experience and reduced desire to consume alcoholic beverages. Our previous toxicological evaluation of MEAI in rats, clearly indicated MEAI's potential to be further evaluated as a promising binge mitigating agent due to its favorable safety profile. In the light of these observations, we have determined MEAI's pharmacokinetic (PK) profile in rats and evaluated in-vitro its pharmacodynamics (PD) profile...
February 16, 2018: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29458135/porcine-heart-interatrial-septum-anatomy
#5
Mateusz K Hołda, Mateusz Koziej, Katarzyna Piątek, Wiesława Klimek-Piotrowska
BACKGROUND: The left-sided atrial septal pouch (SP), a recently re-discovered anatomical structure within the human interatrial septum, has emerged as a possible source of thrombi formation and a trigger for atrial fibrillation, thereby potentially increasing the risk for ischemic stroke. In many studies, the swine interatrial septum has been used as model of the human heart. Also, possible new strategies and devices for management of the SPs may first be tested in this pig model. Therefore, in this study, we aimed to evaluate swine interatrial septum morphology and to compare it with the human analog, especially in the light of SP occurrence...
February 16, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29458074/subthalamic-nucleus-stimulation-dopaminergic-treatment-and-impulsivity-in-parkinson-s-disease
#6
Frédérique Fluchère, Borís Burle, Franck Vidal, Wery van den Wildenberg, Tatiana Witjas, Alexandre Eusebio, Jean-Philippe Azulay, Thierry Hasbroucq
BACKGROUND: Deep brain stimulation of the subthalamic nucleus (STN DBS) is known to increase response speed and lower response accuracy in Parkinson's disease (PD) patients. It has been proposed that this speed-accuracy tradeoff is due to enhanced sensitivity of the motor system to sensory information. An alternative possibility is that this effect is due to weakened suppressive processes. The two alternative interpretations can be tested by analyzing the electromyographic activity (EMG) of the response agonists when the patients perform conflict reaction time tasks...
February 16, 2018: Neuropsychologia
https://www.readbyqxmd.com/read/29458056/alcohol-and-cv-health-jekyll-and-hyde-j-curves
#7
REVIEW
Evan L O'Keefe, James J Di Nicolantonio, James H O'Keefe, Carl J Lavie
A routine of light or moderate alcohol consumption (≤1 drink/day for women and 1 to 2 drinks/day for men) were associated with a lower risk for all-cause mortality, coronary artery disease (CAD), type 2 diabetes mellitus (T2D), heart failure (HF), and stroke. Conversely, heavy drinking, (>4 drinks/day) is associated with an increased risk for death and cardiovascular (CV) disease (CVD). Excessive alcohol intake trails behind only smoking and obesity among the 3 leading causes of premature deaths in the United States (US)...
February 16, 2018: Progress in Cardiovascular Diseases
https://www.readbyqxmd.com/read/29457981/reversible-surface-engineering-via-nitrone-mediated-radical-coupling
#8
Joachim Laun, Wouter Marchal, Vanessa Trouillet, Alexander Welle, An T Hardy, Marlies K Van Bael, Christopher Barner-Kowollik, Tanja Junkers
Efficient and simple polymer conjugation reactions are critical for introducing functionalities on surfaces. For polymer surface grafting, post polymerization modifications are often required, which can impose a significant synthetic hurdle. Here, we report two strategies that allow for reversible surface engineering via nitrone-mediated radical coupling (NMRC). Macroradicals stemming from activation of polymers generated by copper-mediated radical polymerization are grafted via radical trapping with a surface-immobilized nitrone or a solution-borne nitrone...
February 19, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29457971/visible-light-photocatalysis-does-it-make-a-difference-in-organic-synthesis
#9
Leyre Marzo, Santhosh K Pagire, Oliver Reiser, Burkhard König
Visible light photocatalysis has evolved over the last decade into a widely used method in organic synthesis. For many important transformations, such as cross-coupling reactions, alpha-amino functionalizations, cycloadditions, ATRA reactions, or fluorinations, photocatalytic variants have been reported. In this review, we try to compare classical and photocatalytic procedures for selected classes of reactions and highlight their advantages and limitations. In many cases, the photocatalytic reactions proceed at milder reaction conditions, typically at room temperature, and stoichiometric reagents are replaced by simple oxidants or reductants, like air oxygen or amines...
February 19, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29457944/my-light-bulb-moment
#10
Neomi Bennett
No abstract text is available yet for this article.
February 22, 2018: British Journal of Nursing: BJN
https://www.readbyqxmd.com/read/29457931/synthesis-and-characterization-of-nanodiamond-growth-factor-complexes-towards-applications-in-oral-implantation-and-regenerative-medicine
#11
Julie Bang, Caleb Ting, Peter Wang, Ted Kim, Kenneth Wang, Theodore Kee, Darron Miya, Dean Ho, Dong-Keun Lee
Current challenges in the field of regenerative medicine include the need to deliver sustained concentrations of growth factors and genes that are required to induce the repair of deficient tissues. Enhancement of drug delivery and uptake may result in improved growth factor efficacy. Nanodiamonds (NDs) were explored as potential growth factor delivery agents due to the many favorable properties that they possess. For example, ND's biocompatibility has been extensively validated pre-clinically. In addition, they can be scalably produced through impact events such as detonation...
February 19, 2018: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29457913/light-emitting-diode-irradiation-induced-shape-conversion-of-dna-capped-silver-nanoparticles-and-their-antioxidant-and-antibacterial-activities
#12
Navaporn Sritong, Siwat Chumsook, Sineenat Siri
Due to size- and shape-dependent properties, a shape-controlled synthesis of silver nanoparticles (AgNPs) is one of the research challenging topics for their production and potential applications. This work reported the simple eco-friendly syntheses of different shaped AgNPs controlled by the plasmid DNA content and light emitting diodes (LEDs) irradiation. The synthesized AgNPs appeared as yellow, orange and green colloidal AgNPs, which transmission electron microscope (TEM) images revealed their different shapes; spherical AgNPs, a mixture of spherical and hexagonal AgNPs, and a mixture of spherical, hexagonal and corner-truncated triangle AgNPs, respectively...
February 19, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29457909/droplet-translation-actuated-by-photoelectrowetting
#13
Cesar Palma, Robert David Deegan
In traditional electrowetting-on-dielectric devices droplet are moved about a substrate using electric fields produced by an array of discrete electrodes. Here we show that a drop can be driven across a substrate with a localized light beam by exploiting the photoelectrowetting effect, a light-activated variant of electrowetting-on-dielectric. Droplet transport actuated by photoelectrowetting eliminates the need for electrode arrays and the complexities entailed in their fabrication and control, and offers a new approach for designing lab-on-a-chip applications...
February 19, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29457900/three-dimensional-structures-based-on-the-fusion-of-chrysene-and-spirobifluorene-chromophores-for-the-development-of-blue-oleds
#14
Hayoon Lee, Hyocheol Jung, Seokwoo Kang, Jin Hyuck Heo, Sang Hyuk Im, Jongwook Park
A new deep-blue chromophore containing a three-dimensionally (3D) shaped CS core composed of fused chrysene and spirofluorene units is synthesized. A pair of m-terphenyl (TP) units is also substituted onto the CS core, at two different sets of positions to form two additional compounds: CS-TPTP and TP-CS-TP. The TP-CS-TP compound showed the highest efficiency with an external quantum efficiency (EQE) of 3.05%, and Commission Internationale de L'Eclairage coordinates (CIE) of (0.148, 0.098) corresponding to the emission of blue light...
February 19, 2018: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29457896/nature-of-the-color-of-borates-with-anti-zeolite-structure
#15
Tatyana B Bekker, Vladimir P Solntsev, Sergey V Rashchenko, Alexander P Yelisseyev, Alexey V Davydov, Alexander A Kragzhda, Alexander E Kokh, Artem B Kuznetsov, SoHyun Park
Crystals of the Mnx Ba12 (BO3 )8-2x F8x phase were grown from a high-temperature solution. This new fluoride borate is built of positively charged [Ba12 (BO3 )6 ]6+ blocks, the so-called "anti-zeolite" pattern. Using X-ray single-crystal diffraction, the bulk atomic arrangement in the centrosymmetric tetragonal unit cell in I4/mcm could be elucidated. Crystals of the (MnF6 )4- group-containing solid solution Mnx Ba12 (BO3 )8-2x F8x are dark brown in color in contrast to the differently colored crystals of (LiF4 )3- group-containing "anti-zeolite" LiBa12 (BO3 )7 F4 (P42 bc)...
February 19, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29457861/promoted-fixation-of-molecular-nitrogen-with-surface-oxygen-vacancies-on-plasmon-enhanced-tio2-photoelectrodes
#16
Chengcheng Li, Tuo Wang, Zhi-Jian Zhao, Weimin Yang, Jianfeng Li, Ang Li, Zhilin Yang, Geoffrey A Ozin, Jinlong Gong
A hundred years on energy-intensive Haber-Bosch process continuously turn the nitrogen in air into fertilizer, nourishing billions of people while causing pollution and greenhouse gas emissions. The urgency of mitigating climate change motivates people to progress towards a more sustainable way in fixing nitrogen based on clean energy. Surface oxygen vacancies (surface Ovac) hold great potential for N2 adsorption and activation, but introducing Ovac on the very surface without affecting bulk properties remains a great challenge...
February 19, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29457818/light-enhanced-acid-catalysis-over-a-metal-organic-framework
#17
Caiyun Xu, Keju Sun, Yu-Xiao Zhou, Xiao Ma, Hai-Long Jiang
A Brønsted acid-functionalized metal-organic framework (MOF), MIL-101-SO3 H, was prepared for acid-engaged esterification reactions. Strikingly, for the first time, the MOF exhibits significantly light-enhanced activity and possesses excellent activity and recyclability, with even higher activity than H2 SO4 under light irradiation.
February 19, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29457777/perfect-absorption-graphene-metamaterials-for-surface-enhanced-molecular-fingerprint-spectroscopy
#18
Xiangdong Guo, Hai Hu, Baoxin Liao, Xing Zhu, Xiaoxia Yang, Qing Dai
Graphene plasmon with extremely strong light confinement and tunable resonance
 frequency represents a promising surface-enhanced infrared absorption (SEIRA) sensing platform.
 However, plasmonic absorption is relatively weak (approximately 1%~9%) in monolayer
 graphene nanostructures, which would limit it sensitivity. Here, we theoretically propose a hybrid
 plasmon-metamaterial structure that can realize perfect absorption in graphene with a low carrier
 mobility of 1000 cm<sup>2</sup>/Vs...
February 19, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29457773/optical-waveguide-and-room-temperature-high-quality-nanolasers-from-tin-catalyzed-cdsse-nanostructures
#19
Pengfei Guo, Xia Shen, Baolong Zhang, Haibin Sun, Zhijun Zou, Wenchao Yang, Ke Gong, Yongsong Luo
A simple two-step CVD method is developed to realize the growth of high-quality tin-catalyzed CdSSe alloy nanowires. Microstructural characterizations demonstrate that these wires are high-quality crystalline nanostructures. Local photoluminescence investigation of these nanostructures shows a typical band edge emission at 656 nm with a full-width at half-maximum of 22.3 nm. Optical waveguide measurement along an individual nanowire indicates that the output signal of the guided light has a rapid linear decrease accompanied with maximum redshift about 109 meV after the transmission of 102 μm...
February 19, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29457730/cryo-spectroscopy-studies-of-intact-light-harvesting-antennas-reveal-empirical-electronic-energy-transitions-in-two-cyanobacteria-species
#20
Albert Collins Nganou Assonkeng, Noam Adir, Martin Mkandawire
Understanding of electronic energy transition (EET) mechanisms from the light-harvesting unit to the reaction centre in a natural system has been limited by; (a) the use of conventional transient time-resolved spectroscopy at room temperature, which result in high signal-to-noise ratio; and (b) examining extracts instead of intact light-harvesting units. Here, we report previously unknown differences and new insight in EET of two cyanobacteria species, Acaryochloris marina and Thermosynechoccocus vulvanus, which have been found only after using Uv-vis, hole-burning and fluorescence spectroscopy at ultra-low temperature and examining their intact light-harvesting unit, phycobilisomes (PBS)...
February 19, 2018: Journal of Physical Chemistry. B
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