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https://www.readbyqxmd.com/read/28445833/phytochrome-diversification-in-cyanobacteria-and-eukaryotic-algae
#1
REVIEW
Nathan C Rockwell, J Clark Lagarias
Phytochromes control almost every aspect of plant biology, including germination, growth, development, and flowering, in response to red and far-red light. These photoreceptors thus hold considerable promise for engineering crop plant responses to light. Recently, structural research has shed new light on how phytochromes work. Genomic and transcriptomic studies have improved our understanding of phytochrome loss, retention, and diversification during evolution. We are also beginning to understand phytochrome function in cyanobacteria and eukaryotic algae...
April 22, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28444589/ripening-improves-the-content-of-carotenoid-%C3%AE-tocopherol-and-polyunsaturated-fatty-acids-in-tomato-solanum-lycopersicum-l-fruits
#2
Ramesh Kumar Saini, Ahmad Jawid Zamany, Young-Soo Keum
The tomato fruits during different stages of ripening have been extensively characterized for nutritionally important bioactives; however, changes in fatty acid composition are not available. Thus, in the present study, changes in fatty acid, along with carotenoid and α-tocopherol, were studied during the six stages of ripening. Fruits were harvested at the green, breaker, turning, pink, light red, and red stages, which occurred at means of 30, 35, 40, 46, 50, and 55 days after anthesis (DAE), respectively...
May 2017: 3 Biotech
https://www.readbyqxmd.com/read/28442309/a-universal-colorimetry-for-nucleic-acids-and-aptamer-specific-ligands-detection-based-on-dna-hybridization-amplification
#3
Shuang Li, Xinxin Shang, Jia Liu, Yujie Wang, Yingshu Guo, Jinmao You
We present a universal amplified-colorimetric for detecting nucleic acid targets or aptamer-specific ligand targets based on gold nanoparticle-DNA (GNP-DNA) hybridization chain reaction (HCR). The universal arrays consisted of capture probe and hairpin DNA-GNP. First, capture probe recognized target specificity and released the initiator sequence. Then dispersed hairpin DNA modified GNPs were cross-linked to form aggregates through HCR events triggered by initiator sequence. As the aggregates accumulate, a significant red-to purple color change can be easily visualized by the naked eye...
April 22, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28442236/red-blood-cell-membrane-omega-3-fatty-acid-levels-and-physical-performance-cross-sectional-data-from-the-mapt-study
#4
Bertrand Fougère, Philipe de Souto Barreto, Sabine Goisser, Gaëlle Soriano, Sophie Guyonnet, Sandrine Andrieu, Bruno Vellas
BACKGROUND & AIMS: Studies have shown that omega-3 polyunsaturated fatty acids (PUFAs) are associated with brain, cardiovascular and immune function, as well as physical performance and bone health in older adults. So far, few studies have highlighted the associations between PUFA status and performance-based tests of physical function. To study the associations between the omega-3 index (red blood cell (RBC) membrane content of omega-3 PUFAs, such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA)) and physical performance measured with the Short Physical Performance Battery (SPPB) in a sample of community-dwelling older adults...
April 12, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28441937/observation-of-zn-photoprotoporphyrin-red-autofluorescence-in-human-bronchial-cancer-using-color-fluorescence-endoscopy
#5
Yoshinobu Ohsaki, Takaaki Sasaki, Satoshi Endo, Masahiro Kitada, Shunsuke Okumura, Noriko Hirai, Yoshihiro Kazebayashi, Eri Toyoshima, Yasushi Yamamoto, Kaneyoshi Takeyama, Susumu Nakajima, Isao Sakata
BACKGROUND: We observed red autofluorescence emanating from bronchial cancer lesions using a sensitive color-fluorescence endoscopy system. We investigated to clarify the origin of the red autofluorescence. METHODS: The wavelengths of the red autofluorescence emanating from lesions were measured in eight patients using a spectrum analyzer and compared based on pathologic findings. Red autofluorescence at 617.3, 617.4, 619.0, and 617.1 nm was emitted by normal bronchus, inflamed tissue, tissue exhibiting mild dysplasia, and malignant lesions, respectively...
April 26, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28441860/smart-luminescent-coordination-polymers-towards-multi-mode-logic-gates-time-resolved-tribochromic-and-excitation-dependent-fluorescence-phosphorescence-emission
#6
Yongsheng Yang, Ke-Zhi Wang, Dongpeng Yan
In this work, we propose that lanthanide cations (such as Eu3+ and Tb3+) doped long-afterglow coordination polymer (CP) can be an effective way to design multi-mode optical logic gates based on their tunable fluorescence/phosphorescence transformation and state-dependent emission. First, multi-color and white-light luminescence across the blue/green/yellow/red visible regions can be obtained by balancing the co-doping ratio of Eu3+/Tb3+ cations and suitable excitations. Additionally, new mechanochromic Eu-Cd-CP was developed based on the mechanism of change in structural symmetry...
April 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28441605/biological-effects-and-medical-applications-of-infrared-radiation
#7
Shang-Ru Tsai, Michael R Hamblin
Infrared (IR) radiation is electromagnetic radiation with wavelengths between 760nm and 100,000nm. Low-level light therapy (LLLT) or photobiomodulation (PBM) therapy generally employs light at red and near-infrared wavelengths (600-100nm) to modulate biological activity. Many factors, conditions, and parameters influence the therapeutic effects of IR, including fluence, irradiance, treatment timing and repetition, pulsing, and wavelength. Increasing evidence suggests that IR can carry out photostimulation and photobiomodulation effects particularly benefiting neural stimulation, wound healing, and cancer treatment...
April 13, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28441144/highly-efficient-inverted-organic-light-emitting-diodes-by-inserting-zinc-oxide-polyethyleneimine-zno-pei-nano-composite-interfacial-layer
#8
Rifat Kaçar, Selin Mucur, Fikret Yildiz, Salih Dabak, Emine Tekin
The electrode/organic interface is one of the crucial key factor to attain superior device performance in organic electronics, and inserting a tailor-made layer can dramatically modify its properties. Using of nano-composite (NC) materials lead to many advantages by combining the materials with the objective of getting desirable combination of properties. In this context, zinc oxide/polyethyleneimine (ZnO:PEI) NC film was incorporated as the interfacial layer into the inverted bottom-emission organic light emitting diodes (IBOLEDs) and fully optimized...
April 25, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28441021/photophysical-and-electroluminescent-properties-of-ptag2-acetylide-complexes-supported-with-meso-and-rac-tetraphosphine
#9
Hui-Xing Shu, Jin-Yun Wang, Qian-Chong Zhang, Zhong-Ning Chen
1,2-Bis[[(diphenylphosphino)methyl](phenyl)phosphino]ethane (dpmppe) was prepared as a new tetraphosphine, and the corresponding rac and meso stereoisomers were successfully separated in view of their solubility difference in acetone. The substitution of PPh3 into Pt(PPh3)2(C≡CR)2 (R = aryl) with rac- or meso-dpmppe gives Pt(rac-dpmppe)(C≡CR)2 or Pt(meso-dpmppe)(C≡CR)2, respectively. Using Pt(rac-dpmppe)(C≡CR)2 or Pt(meso-dpmppe)(C≡CR)2 as a precursor, PtAg2 heterotrinuclear cluster complexes were synthesized and characterized by X-ray crystallography...
April 25, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28440632/thermally-stable-zinc-disalphen-macrocycles-showing-solid-state-and-aggregation-induced-enhanced-emission
#10
Jameel A Marafie, Donal D C Bradley, Charlotte K Williams
In order to investigate the solid-state light emission of zinc salphen macrocycle complexes, 7 dinuclear zinc salphen macrocycle complexes (1-7), with acetate or hexanoate coligands, are synthesized. The complexes are stable in air up to 300 °C, as shown via thermogravimetric analysis (TGA), and exhibit green to orange-red emission in solution (λem = 550-600 nm, PLQE ≤ 1%) and slightly enhanced yellow to orange-red emission in the solid state (λem = 570-625 nm, PLQE = 1-5%). Complexes 1, 2, 4, 5, and 7 also display aggregation-induced enhanced emission (AIEE) when hexane (a nonsolvent) is added to a chloroform solution of the complexes, with complex 4 displaying a 75-fold increase in peak emission intensity upon aggregation (in 0...
April 25, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28439553/maximizing-the-performance-of-photothermal-actuators-by-combining-smart-materials-with-supplementary-advantages
#11
Tongyu Wang, David Torres, Félix E Fernández, Chuan Wang, Nelson Sepúlveda
The search for higher-performance photothermal microactuators has typically involved unavoidable trade-offs that hinder the demonstration of ubiquitous devices with high energy density, speed, flexibility, efficiency, sensitivity, and multifunctionality. Improving some of these parameters often implies deterioration of others. Photothermal actuators are driven by the conversion of absorbed optical energy into thermal energy, which, by different mechanisms, can produce mechanical displacement of a structure...
April 2017: Science Advances
https://www.readbyqxmd.com/read/28438229/energy-drinks-available-in-ireland-a-description-of-caffeine-and-sugar-content
#12
Laura Keaver, Susannah Gilpin, Joana Caldeira Fernandes da Silva, Claire Buckley, Cliodhna Foley-Nolan
OBJECTIVE: To describe the caffeine and sugar content of all energy drinks available on the island of Ireland. DESIGN: Two retail outlets were selected from each of: multinational, convenience and discount stores in Northern Ireland and the Republic of Ireland, and all available single-serve energy drinks were purchased. The cross-sectional survey was conducted in February 2015 and brand name, price, volume, caffeine and sugar content were recorded for each product...
April 25, 2017: Public Health Nutrition
https://www.readbyqxmd.com/read/28438153/damage-to-the-macula-associated-with-led-derived-blue-laser-exposure-a-case-report
#13
Lingling Liang, Zhihua Cui, Chengwei Lu, Qian Hao, Yajuan Zheng
BACKGROUND: Light emitting diodes laser is emerging as an important source of light replacing conventional lights. It is widely used for illumination in the bar where young people love to go. But not everyone knows about the light damage to the eye especially to the macula. In this article, we report the case of a macular damage induced by LED-derived blue laser in a bar, studied with optical coherence tomography (OCT) to evaluate the retinal lesion and multifocal electroretinography (mfERG) to evaluate functional damage...
April 24, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28438019/l-phenylalanine-tethered-naphthalene-diimide-based-aggregation-induced-green-emitting-organic-nanoparticles
#14
Pritam Choudhury, Krishnendu Das, Prasanta Kumar Das
The present article delineates the formation of green fluorescent organic nanoparticle through supramolecular aggregation of naphthalene diimide (NDI) based carboxybenzyl protected L-phenylalanine appended bola-amphiphile, NDI-1. The amphiphilic molecule is soluble in DMSO and with gradual addition of water within the DMSO solution, the amphiphile starts to get self-assembled via H-type aggregation to form spherical nanoparticles. These self-assembly of NDI-1 in presence of high amount of water, exhibited aggregation induced emission (AIE) through excimer formation...
April 24, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28438012/smartphone-based-dual-modality-imaging-system-for-quantitative-detection-of-color-or-fluorescent-lateral-flow-immunochromatographic-strips
#15
Yafei Hou, Kan Wang, Kun Xiao, Weijian Qin, Wenting Lu, Wei Tao, Daxiang Cui
Nowadays, lateral flow immunochromatographic assays are increasingly popular as a diagnostic tool for point-of-care (POC) test based on their simplicity, specificity, and sensitivity. Hence, quantitative detection and pluralistic popular application are urgently needed in medical examination. In this study, a smartphone-based dual-modality imaging system was developed for quantitative detection of color or fluorescent lateral flow test strips, which can be operated anywhere at any time. In this system, the white and ultra-violet (UV) light of optical device was designed, which was tunable with different strips, and the Sobel operator algorithm was used in the software, which could enhance the identification ability to recognize the test area from the background boundary information...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28437921/development-and-evaluation-of-colour-control-interfaces-for-led-lighting
#16
Wenye Hu, Wendy Davis
To capitalise on the colour tuning capabilities of LED lighting, a model for converting device-specific control signals to chromaticity coordinates was used in a psychophysical experiment evaluating the usability of three colour control interfaces based on RGB (red, green, blue), HSB (hue, saturation, brightness) and opponent colour mixing systems. Although common and well accepted, the RGB interface had lowest usability based on both psychophysical results and subjective ratings. The usability of HSB and opponent colour interfaces was not significantly different...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437896/variability-of-apparent-and-inherent-optical-properties-of-sediment-laden-waters-in-large-river-basins-lessons-from-in-situ-measurements-and-bio-optical-modeling
#17
Sylvain Pinet, Jean-Michel Martinez, Sylvain Ouillon, Bruno Lartiges, Raul Espinoza Villar
We investigated the relationships between inherent and apparent optical properties (IOP and AOP, respectively) and suspended sediment concentrations (SSC) in the main Amazonian river waters. In situ measurements of SSC, remote sensing reflectance (R<sub>rs</sub>), the diffuse light attenuation coefficient (K<sub>d</sub>) and the total and non-algal particle (NAP) absorption coefficients (a<sub>TOT</sub> and a<sub>NAP</sub>, respectively) were conducted during three sampling trips along different streams of the Amazon River catchment (104 stations)...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28436499/white-light-emission-with-tuneable-colour-temperature-and-high-colour-rendering-index-from-cds-si-multi-interface-nanoheterojunctions
#18
Yong Li, Yue Li Song, Peng Fei Ji, Feng Qun Zhou
CdS/Si multi-interface nanoheterojunctions (CdS/Si-NPA) were fabricated by depositing CdS nanocrystallites (nc-CdS) on silicon nanoporous pillar arrays (Si-NPA) by chemical bath deposition. White electroluminescence (EL) with a high colour rendering index from a prototypical light emitting diode based on CdS/Si-NPA has been reported, which does not need complex colour mixing or conversion techniques. The white EL can be composed into three primary colours, which include blue emissions from the Si-NPA, the green emissions from the bandgap emission of nc-CdS and red emissions from the defects in the nc-CdS...
April 24, 2017: Nanoscale
https://www.readbyqxmd.com/read/28436311/role-of-6-mercaptopurine-in-the-potential-therapeutic-targets-dna-base-pairs-and-g-quadruplex-dna-insights-from-quantum-chemical-and-molecular-dynamics-simulations
#19
R Radhika, R Shankar, S Vijayakumar, P Kolandaivel
The theoretical studies on DNA with the anticancer drug 6-Mercaptopurine (6-MP) are investigated using theoretical methods to shed light on drug designing. Among the DNA base pairs considered, 6-MP is stacked with GC with the highest interaction energy of -46.19 kcal/mol. Structural parameters revealed that structure of the DNA base pairs is deviated from the planarity of the equilibrium position due to the formation of hydrogen bonds and stacking interactions with 6-MP. These deviations are verified through the systematic comparison between X-H bond contraction and elongation and the associated blue shift and red shift values by both NBO analysis and vibrational analysis...
April 24, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28435959/luminescence-colour-changing-sensing-of-mn-2-and-ag-ions-based-on-a-white-light-emitting-lanthanide-coordination-polymer
#20
Yu-Xin Li, Shang-Ju Li, Peng-Fei Yan, Xin-Yu Wang, Xu Yao, Guang-Hui An, Guang-Ming Li
The white-light emission of a triple-component lanthanide coordination polymer turns to blue and red upon adding Mn(2+) and Ag(+) ions, respectively.
April 24, 2017: Chemical Communications: Chem Comm
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