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https://www.readbyqxmd.com/read/28454047/use-of-light-emitting-diodes-leds-for-enhanced-lipid-production-in-micro-algae-based-biofuels
#1
Alifha Severes, Shashank Hegde, L D'Souza, Smitha Hegde
Microalgae are an alternative source for renewable energy to overcome the energy crises caused by exhaustion of fuel reserves. Algal biofuel technology demands a cost effective strategy for net profitable productivity. Inconsistent illumination intensities hinder microalgal growth. The light-utilizing efficiency of the cells is critical. Light scarcity leads to low production and high intensities cause photo-inhibition. We report effective usage of LEDs of different band wavelengths on the growth of microalgae in a closed, controlled environment to generate biomass and lipid yields...
April 20, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28448832/fabrication-of-a-novel-z-scheme-g-c3n4-bi4o7-heterojunction-photocatalyst-with-enhanced-visible-light-driven-activity-toward-organic-pollutants
#2
Meng Sun, Yu Wang, Yu Shao, Yunhui He, Qi Zeng, Huikai Liang, Tao Yan, Bin Du
In this work, highly efficient g-C3N4/Bi4O7 heterojunction photocatalysts have been successfully fabricated by a facile method. Compared with the bare photocatalysts, the obtained g-C3N4/Bi4O7 hybrid photocatalysts exhibited efficient degradation activity toward methylene blue (MB), phenol, rhodamine B (RhB), and bisphenol A (BPA) under visible light irradiation. The influences of different g-C3N4 contents on the photocatalytic efficiency of the hybrid photocatalysts have been investigated. The results revealed that the g-C3N4/Bi4O7 with g-C3N4 mass ratio of 30% exhibited the best photocatalytic activity...
April 19, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28448534/intense-light-elicited-upregulation-of-mir-21-facilitates-glycolysis-and-cardioprotection-through-per2-dependent-mechanisms
#3
Colleen Marie Bartman, Yoshimasa Oyama, Kelley Brodsky, Ludmila Khailova, Lori Walker, Michael Koeppen, Tobias Eckle
A wide search for ischemic preconditioning (IPC) mechanisms of cardioprotection identified the light elicited circadian rhythm protein Period 2 (Per2) to be cardioprotective. Studies on cardiac metabolism found a key role for light elicited Per2 in mediating metabolic dependence on carbohydrate metabolism. To profile Per2 mediated pathways following IPC of the mouse heart, we performed a genome array and identified 352 abundantly expressed and well-characterized Per2 dependent micro RNAs. One prominent result of our in silico analysis for cardiac Per2 dependent micro RNAs revealed a selective role for miR-21 in the regulation of hypoxia and metabolic pathways...
2017: PloS One
https://www.readbyqxmd.com/read/28448011/turbidimetry-on-human-washed-platelets-the-effect-of-the-pannexin1-inhibitor-brilliant-blue-fcf-on-collagen-induced-aggregation
#4
Filippo Molica, Séverine Nolli, Pierre Fontana, Brenda Renata Kwak
Turbidimetry is a laboratory technique that is applied to measure the aggregation of platelets suspended in either plasma (platelet-rich plasma, PRP) or in buffer (washed platelets), by the use of one or a combination of agonists. The use of washed platelets separated from their plasma environment and in the absence of anticoagulants allows for studying intrinsic platelet properties. Among the large panel of agonists, arachidonic acid (AA), adenosine di-phosphate (ADP), thrombin and collagen are the most frequently used...
April 6, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447351/estimating-melanin-location-in-the-pigmented-skin-lesions-by-hue-saturation-lightness-color-space-values-of-dermoscopic-images
#5
REVIEW
Hiroshi Sakai, Yoshimi Ando, Kuniko Ikinaga, Masaru Tanaka
The depth of melanin in the skin can be estimated roughly by observation of the color exhibited on dermoscopy. Currently, there are no objective methods to estimate it. The aim of the present study was to clarify the relationship between the depth of melanin in the skin and the color variation exhibited, and to objectively estimate the 3-D location of melanin in the pigmented skin lesions from dermoscopic images. Representative colors in dermoscopic images of acral compound nevus, Spitz nevus and blue nevus were evaluated by the subjectively perceived color on dermoscopy and objective values in hue-saturation-lightness color space values...
May 2017: Journal of Dermatology
https://www.readbyqxmd.com/read/28446946/neural-imaging-using-single-photon-avalanche-diodes
#6
Mohammad Azim Karami, Misagh Ansarian
INTRODUCTION: This paper analyses the ability of single-photon avalanche diodes (SPADs) for neural imaging. The current trend in the production of SPADs moves toward the minimum dark count rate (DCR) and maximum photon detection probability (PDP). Moreover, the jitter response which is the main measurement characteristic for the timing uncertainty is progressing. METHODS: The neural imaging process using SPADs can be performed by means of florescence lifetime imaging (FLIM), time correlated single-photon counting (TCSPC), positron emission tomography (PET), and single-photon emission computed tomography (SPECT)...
January 2017: Basic and Clinical Neuroscience
https://www.readbyqxmd.com/read/28446542/a-proteolytic-regulator-controlling-chalcone-synthase-stability-and-flavonoid-biosynthesis-in-arabidopsis
#7
Xuebin Zhang, Carolina Abrahan, Thomas A Colquhoun, Chang-Jun Liu
Flavonoids represent a large family of specialized metabolites involved in plant growth, development and adaptation. Chalcone synthase (CHS) catalyzes the first step of flavonoid biosynthesis by directing carbon flux from general phenylpropanoid metabolism to flavonoid pathway. Despite extensive characterization on its function and transcriptional regulation, the molecular basis governing its post-translational modification is enigmatic. Here, we report the discovery of a proteolytic regulator of CHS, namely KFBCHS, a Kelch domain-containing F-box protein in Arabidopsis...
April 26, 2017: Plant Cell
https://www.readbyqxmd.com/read/28446222/effect-of-quantity-and-intensity-of-pulsed-light-on%C3%A2-human-non-visual-physiological-responses
#8
Qianying Dai, Yuria Uchiyama, Soomin Lee, Yoshihiro Shimomura, Tetsuo Katsuura
BACKGROUND: Exposure to pulsed light results in non-visual physiological responses in humans. The present study aims to investigate whether such non-visual effects are influenced to a greater extent by the intensity of lighting or by the power (quantity) of lighting. METHODS: >Twelve healthy young male participants (23 ± 0.3 years, 21-24 age range) were recruited for the present study. Participants were exposed to light of varying levels of intensity and quantity whose frequency was held constant across the conditions, which consisted of exposure to blue (different intensity, constant quantity) and white (constant intensity, different quantity) LEDs...
April 26, 2017: Journal of Physiological Anthropology
https://www.readbyqxmd.com/read/28445880/heating-of-newborn-infants-due-to-blue-light-emitting-diode-fibreoptic-phototherapy-pads
#9
Pei Ling Ng, Tony Carlisle, Marleesa Ly, Scott Adam Morris
BACKGROUND: Surface temperatures of fibreoptic phototherapy pads using a high intensity blue light-emitting diode (LED) light source have not been studied. OBJECTIVES: The aim of this study was to measure the temperature of LED fibreoptic phototherapy pads during phototherapy in a bench-top study, and to determine temperature effects on babies during phototherapy. METHODS: A commercially available LED fibreoptic phototherapy system was tested...
April 27, 2017: Neonatology
https://www.readbyqxmd.com/read/28444555/evaluating-the-effectiveness-of-a-novel-atomized-liquid-needle-free-transdermal-delivery-system
#10
Yi-Huei Huang, Chieh-Shen Hu, Yi-Jhen Ke, Chiao-Hsi Chiang, Po-Da Hong, Ming-Kung Yeh
Needle-free jet injections constitute a crucial method for drug delivery. A novel liquid drug delivery system has been proposed recently, in which pressure atomizes liquid before delivering that atomized liquid to the patient's body; however, the mechanism and efficiency of the system are unclear. This study explored the shot delivery pressure, penetration depth, and cumulative amount of permeation of this system. This system was used to deliver 0.5% (w/v) methylene blue to agarose phantoms at various shot delivery pressures...
April 25, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28443899/the-role-of-sulfur-oxidation-in-controlling-the-electronic-properties-of-sulfur-containing-host-molecules-for-phosphorescent-organic-light-emitting-diodes
#11
E Varathan, V Subramanian
In this study a series of dibenzothiophene (DBT) derivatives having different valence states of sulfur atoms have been reported as host materials for blue phosphorescent organic light-emitting diodes. Their electronic properties have also been thoroughly investigated to develop structure-property relationships which include the consideration of the effect of various oxidation states of the sulfur atom in the core moiety and linking (C-N linkage) of subunits with the core at different positions. The results obtained from the electronic structure calculations highlight that the triplet energy (ET), singlet-triplet energy difference (ΔEST), reorganization energy for the hole and the injection barrier for the electron decrease with an increase in the oxidation state of the sulfur atom in DBT...
April 26, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28442946/optogenetic-rescue-of-locomotor-dysfunction-and-dopaminergic-degeneration-caused-by-alpha-synuclein-and-eko-genes
#12
Cheng Qi, Scott Varga, Soo-Jin Oh, C Justin Lee, Daewoo Lee
α-Synuclein (α-Syn) is a small presynaptic protein and its mutant forms (e.g. A53T) are known to be directly associated with Parkinson's disease (PD). Pathophysiological mechanisms underlying α-Syn-mediated neurodegeneration in PD still remain to be explored. However, several studies strongly support that overexpression of mutant α-Syn causes reduced release of dopamine (DA) in the brain, and contributes to motor deficits in PD. Using a favorable genetic model Drosophila larva, we examined whether reduced DA release is enough to induce key PD symptoms (i...
April 2017: Experimental Neurobiology
https://www.readbyqxmd.com/read/28442309/a-universal-colorimetry-for-nucleic-acids-and-aptamer-specific-ligands-detection-based-on-dna-hybridization-amplification
#13
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/28441863/high-triplet-energy-level-achieved-by-tuning-the-arrangement-of-building-blocks-in-phosphorescent-polymer-backbones-for-furnishing-high-electroluminescent-performances-in-both-blue-and-white-organic-light-emitting-devices
#14
Boao Liu, Feifan Dang, Zhuanzhuan Tian, Zhao Feng, Deyuan Jin, Wanping Dang, Xiaolong Yang, Guijiang Zhou, Zhaoxin Wu
High triplet energy-level (ET) of ca. 2.83 eV has been achieved in novel polymer backbone through tuning the arrangement of two kinds of building blocks showing enhanced hole injection/transporting capacity. Based on this new polymer backbone with high ET, both blue and white phosphorescent polymers have been successfully developed with trade-off between high ET and enhanced charge carrier transporting ability of the polymer backbones. In addition, their photophysical features, electrochemical behaviors and electroluminescent (EL) properties have been characterized in detail...
April 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28441860/smart-luminescent-coordination-polymers-towards-multi-mode-logic-gates-time-resolved-tribochromic-and-excitation-dependent-fluorescence-phosphorescence-emission
#15
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/28441733/bioactivity-studies-on-titania-coatings-and-the-estimation-of-their-usefulness-in-the-modification-of-implant-surfaces
#16
Aleksandra Radtke, Adrian Topolski, Tomasz Jędrzejewski, Wiesław Kozak, Beata Sadowska, Marzena Więckowska-Szakiel, Piotr Piszczek
Morphologically different titania coatings (nanofibers (TNFs), nanoneedles (TNNs), and nanowires (TNWs)) were studied as potential biomedical materials. The abovementioned systems were produced in situ on Ti6Al4V substrates via direct oxidation processes using H₂O₂ and H₂O₂/CaCl₂ agents, and via thermal oxidation in the presence of Ar and Ar/H₂O₂. X-ray diffraction and Raman spectroscopy have been used to structurally characterize the produced materials. The morphology changes on the titanium alloy surface were investigated using scanning electron microscopy...
April 22, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28441144/highly-efficient-inverted-organic-light-emitting-diodes-by-inserting-zinc-oxide-polyethyleneimine-zno-pei-nano-composite-interfacial-layer
#17
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/28439996/energy-dispersive-spectroscopy-scanning-transmission-electron-microscope-observations-of-free-radical-production-in-human-polymorphonuclear-leukocytes-phagocytosing-non-opsonized-tannerella-forsythia
#18
Keiichi Moriguchi, Yoshiaki Hasegawa, Naoya Higuchi, Yukitaka Murakami, Fuminobu Yoshimura, Kazuhiko Nakata, Masaki Honda
We investigated the association between human polymorphonuclear leukocytes (PMNs) and non-opsonized Tannerella forsythia ATCC 43037 displaying a serum-resistant surface layer (S-layer). When PMNs were mixed with T. forsythia in suspension, the cells phagocytosed T. forsythia cells. Nitro blue tetrazolium (NBT) reduction, indicative of O2- production, was observed by light microscopy; cerium (Ce) perhydroxide deposition, indicative of H2 O2 production, was observed by electron microscopy. We examined the relationship between high-molecular-weight proteins of the S-layer and Ce reaction (for T...
April 24, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28439084/preparation-of-heterostructured-wo3-tio2-catalysts-from-wood-fibers-and-its-versatile-photodegradation-abilities
#19
Likun Gao, Wentao Gan, Zhe Qiu, Xianxu Zhan, Tiangang Qiang, Jian Li
A facile route was adopted to synthesize heterostructured WO3/TiO2 photocatalysts from wood fibers through a two-steps hydrothermal method and a calcination process. The prepared WO3/TiO2-wood fibers were used as photocatalysts under UV irradiation for photodegradation of rhodamine B, methylene blue and methyl orange. In calcination process, the wood fibers acted as carbon substrates to prepare the WO3/TiO2 photocatalysts with high surface area and unique morphology. Thus, the significant enhanced photodegradation efficiency of the organic pollutants with the WO3/TiO2-wood fibers under UV irradiation was obtained...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28438153/damage-to-the-macula-associated-with-led-derived-blue-laser-exposure-a-case-report
#20
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
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