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https://www.readbyqxmd.com/read/28537713/site-occupancy-preference-and-antithermal-quenching-of-the-bi-2-deep-red-emission-in-%C3%AE-ca2p2o7-bi-2
#1
Liyi Li, Jiangkun Cao, Bruno Viana, Shanhui Xu, Mingying Peng
The resistance to thermal quenching is an essential factor in evaluating the performance of luminescent materials for application in white light emitting diodes (WLEDs). In this work, we studied the site occupancy preference and thermal quenching of luminescence in β-Ca2P2O7:Bi(2+) red phosphor at low (10-300 K) and high temperatures (303-573 K). In β-Ca2P2O7, the host lattice has four different calcium sites, at which Bi(2+)dopant can be located. After comparing the change of bond energy when the Bi(2+) ions are incorporated into the four calcium sites, we found out that Bi(2+) would preferentially occupy the smaller energy variation sites Ci(2) and Ci(1) in this compound, which can be assigned to Bi(2) and Bi(1), respectively...
May 24, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28535500/transient-receptor-potential-vanilloid-5-mediates-ca2-influx-and-inhibits-chondrocyte-autophagy-in-a-rat-osteoarthritis-model
#2
Yingliang Wei, Yanfang Wang, Yutong Wang, Lunhao Bai
BACKGROUND: Autophagy, a self-protective mechanism of chondrocytes, has become a promising target to impede the progress of osteoarthritis (OA). Autophagy is regulated by cytosolic Ca2+ activity and may thus be modified by the Ca2+ permeable transient receptor potential channel vanilloid 5 (TRPV5). Therefore, we investigated the potential role of TRPV5 in mediating Ca2+ influx and in inhibiting chondrocyte autophagy in a rat OA model. METHODS: The rat OA model was assessed by macroscopic and histological analyses...
May 25, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28535413/controllable-synthesis-and-luminescent-properties-of-rare-earth-doped-gd2-moo4-3-nanoplates
#3
Lei Zhang, Bohua Dong, Guohua Wang, Rongjie Gao, Ge Su, Wei Wang, Lixin Cao
For the first time, we have successfully synthesized rare-earth doped Gd2(MoO4)3: RE(3+) (RE=Eu, Tb) nanoplates by solvothermal method. The morphology of Gd2(MoO4)3 can be manipulated by changing the reaction times and reaction temperatures. The composition and surface morphology have been investigated by X-ray powder diffraction (XRD) and transmission electron microscopy (TEM), respectively. Under the excitation of UV, Photoluminescence (PL) has been used to explore the excellent luminescence properties of the synthesized nanophosphors...
April 21, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28535078/complementation-of-ctb7-in-the-maize-pathogen-cercospora-zeina-overcomes-the-lack-of-in-vitro-cercosporin-production
#4
Velushka Swart, Bridget Genevieve Crampton, John Ridenour, Burton Bluhm, Nicholas Olivier, Marion Meyer, Dave Kenneth Berger
Gray leaf spot (GLS), caused by the sibling species Cercospora zeina or Cercospora zeae-maydis, is cited as one of the most important diseases threatening global maize production. C. zeina fails to produce cercosporin in vitro, and in most cases causes large coalescing lesions during maize infection; a symptom generally absent from cercosporin-deficient mutants in other Cercospora spp. Here we describe the C. zeina cercosporin toxin biosynthetic gene cluster. The oxidoreductase gene CTB7 contained several insertions and deletions as compared to the C...
May 23, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/28534893/a-ruthenium-tetrazole-complex-based-high-efficiency-near-infrared-light-electrochemical-cell
#5
Hashem Shahroosvand, Saeid Abaspour, Babak Pashaei, Eros Radicchi, Filippo De Angelis, Francesco Bonaccorso
We report on the exploitation of a new tetrazole-substituted 1,10-phenanthroline and a 2,2'-bipyridine (bpy) ancillary ligand modified with an electron-donating group in cationic ruthenium complexes. This complex, placed in between two electrodes without any polymer, demonstrates high efficiency near-infrared (NIR) electroluminescence (EL). The comparison between bpy and its methyl-substituted ancillary ligand shows that the cationic Ru tetrazolate complex containing methyl groups exhibits a red shift in the EL wavelength from 620 to 800 nm compared to [Ru(bpy)3](2+) and an almost twofold reduction in the turn-on voltage, i...
May 23, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28532320/effects-of-light-quality-on-pod-elongation-in-soybean-glycine-max-l-merr-and-cowpea-vigna-unguiculata-l-walp
#6
Seiya Tanaka, Nobuyuki Ario, Andressa Camila Seiko Nakagawa, Yuki Tomita, Naoki Murayama, Takatoshi Taniguchi, Norimitsu Hamaoka, Mari Iwaya-Inoue, Yushi Ishibashi
Soybean pods are located at the nodes, where they are in the shadow, whereas cowpea pods are located outside of the leaves and are exposed to sunlight. To compare the effects of light quality on pod growth in soybean and cowpea, we measured the length of pods treated with white, blue, red or far-red light. In both species, pods elongated faster during the dark period than during the light period in all light treatments except red light treatment in cowpea. Red light significantly suppressed pod elongation in soybean during the dark and light periods...
May 22, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28531198/a-real-time-traffic-control-method-for-the-intersection-with-pre-signals-under-the-phase-swap-sorting-strategy
#7
Yiming Bie, Zhiyuan Liu, Yinhai Wang
To deal with the conflicts between left-turn and through traffic streams and increase the discharge capacity, this paper addresses the pre-signal which is implemented at a signalized intersection. Such an intersection with pre-signal is termed as a tandem intersection. For the tandem intersection, phase swap sorting strategy is deemed as the most effective phasing scheme in view of some exclusive merits, such as easier compliance of drivers, and shorter sorting area. However, a major limitation of the phase swap sorting strategy is not considered in previous studies: if one or more vehicle is left at the sorting area after the signal light turns to red, the capacity of the approach would be dramatically dropped...
2017: PloS One
https://www.readbyqxmd.com/read/28530759/a-dual-emission-probe-to-detect-moisture-and-water-in-organic-solvents-based-on-green-tb-3-post-coordinated-metal-organic-frameworks-with-red-carbon-dots
#8
Jing-Xing Wu, Bing Yan
Using p-phenylenediamine as a precursor, p-carbon dots (p-CDs) with strong red-light emission were encapsulated into a metal-organic framework (MOF) followed by introduction of green light-emitting Tb(3+) to form a two-color light-emitting hybrid (Tb(3+)@p-CDs/MOF). The as-prepared fluorescent-functionalized MOF not only maintained the excellent optical properties of p-CDs and Tb(3+) to give strong emission, but also had good chemical and physical properties. The chosen p-CDs were aggregated readily in water, which led to only very weak photoluminescence, whereas the opposite effect was noted in the organic solvents ethanol, dimethylformamide and cyclopropane...
May 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28530733/photophysical-properties-singlet-oxygen-generation-efficiency-and-cytotoxic-effects-of-aloe-emodin-as-a-blue-light-photosensitizer-for-photodynamic-therapy-in-dermatological-treatment
#9
Lixin Zang, Huimin Zhao, Xueyu Ji, Wenwu Cao, Zhiguo Zhang, Peisong Meng
Conventional photodynamic therapy (PDT) uses red light for deeper penetration. A natural compound, aloe emodin (AE) with anticancer and photosensitising capabilities, excited by blue light, is proposed to treat superficial diseases. The photophysical properties and singlet oxygen quantum yield (ΦΔ) of AE, as well as the cytotoxic effects of AE on human cells, were investigated. The absorption and emission spectra of AE were analyzed. The ΦΔ of AE was measured by a relative method. In order to study the relationship between ΦΔ and the oxygen concentration, the dependence of ΦΔ on the oxygen concentration was investigated...
May 22, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28530708/engineering-rgb-color-vision-into-escherichia-coli
#10
Jesus Fernandez-Rodriguez, Felix Moser, Miryoung Song, Christopher A Voigt
Optogenetic tools use colored light to rapidly control gene expression in space and time. We designed a genetically encoded system that gives Escherichia coli the ability to distinguish between red, green, and blue (RGB) light and respond by changing gene expression. We use this system to produce 'color photographs' on bacterial culture plates by controlling pigment production and to redirect metabolic flux by expressing CRISPRi guide RNAs.
May 22, 2017: Nature Chemical Biology
https://www.readbyqxmd.com/read/28530200/antioxidant-antibacterial-and-anticancer-properties-of-phyto-synthesised-artemisia-quttensis-podlech-extract-mediated-agnps
#11
Farinaz Ghanbar, Amir Mirzaie, Fatemeh Ashrafi, Hassan Noorbazargan, Mojgan Dalirsaber Jalali, Soheil Salehi, Seyed Ataollah Sadat Shandiz
The focus of this study is on a rapid and cost-effective approach for the synthesis of silver nanoparticles (AgNPs) using Artemisia quttensis Podlech aerial parts extract and assessment of their antioxidant, antibacterial and anticancer activities. The prepared AgNPs were determined by ultraviolet-visible spectroscopy, X-ray diffraction, Fourier transform infra-red spectroscopy, transmission electron microscopy, scanning electron microscopy, energy-dispersive spectroscopy, and dynamic light scattering and zeta-potential analysis...
June 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/28529456/ethyl-acetate-fraction-of-huogu-formula-inhibits-adipogenic-differentiation-of-bone-marrow-stromal-cells-via-the-bmp-and-wnt-signaling-pathways
#12
Xiangying Kong, Xiaomin Li, Cun Zhang, Liuluan Zhu, Chunfang Liu, Qingxia Qin, Cuiling Liu, Qianqian Wang, Jia Zhu, Xuan Wu, Hongye Wan, Weiheng Chen, Na Lin
Elevated adipogenesis of bone marrow stromal cells (BMSCs) is closely associated with non-traumatic osteonecrosis of femoral head (ONFH). Our previous studies have shown that Huogu (HG) formula was effective both in clinic experience and experimental ONFH. How HG impacts the differentiation of BMSCs and what is the underlying molecular mechanism remain largely unknown. Our results showed that ethyl acetate extract of HG (HGE) significantly decreased the adipocyte differentiation as determined by oil red staining, while slightly increased the ALP activity...
2017: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/28528603/a-retrospective-study-of-multiple-sequential-light-and-laser-sources-to-activate-aminolevulinic-acid-in-the-treatment-of-acne-vulgaris
#13
Daniel P Friedmann, Mitchel P Goldman, Sabrina G Fabi, Isabella Guiha
Reports of the sequential use of multiple light and laser sources for topical 5-aminolevulinic acid (ALA) activation in photodynamic therapy (PDT) of inflammatory acne vulgaris are lacking. The authors sought to retrospectively compare field-directed ALA-PDT with blue light only, blue light + pulsed dye laser (PDL), blue light + intense pulsed light (IPL), blue light + PDL + IPL, or blue light + red light + PDL + IPL for inflammatory acne of the face or upper trunk. Results showed a trend toward greater patient-reported improvement with comparable tolerability using multiple, sequential light sources in ALA-PDT for acne vulgaris, albeit not statistically significant...
2017: Skinmed
https://www.readbyqxmd.com/read/28526061/photosynthesis-at-the-far-red-region-of-the-spectrum-in-acaryochloris-marina
#14
REVIEW
Syed Lal Badshah, Yahia Mabkhot, Salim S Al-Showiman
Acaryochloris marina is an oxygenic cyanobacterium that utilizes far-red light for photosynthesis. It has an expanded genome, which helps in its adaptability to the environment, where it can survive on low energy photons. Its major light absorbing pigment is chlorophyll d and it has α-carotene as a major carotenoid. Light harvesting antenna includes the external phycobilin binding proteins, which are hexameric rods made of phycocyanin and allophycocyanins, while the small integral membrane bound chlorophyll binding proteins are also present...
May 19, 2017: Biological Research
https://www.readbyqxmd.com/read/28524654/polyethylenimine-insulativity-dominant-charge-injection-balance-for-highly-efficient-inverted-quantum-dot-light-emitting-diodes
#15
Ke Ding, Hongting Chen, Lianwei Fan, Bo Wang, Zhi Huang, Shaoqing Zhuang, Bin Hu, Lei Wang
Quantum dot light emitting diode (QLED) with an inverted architecture always suffers charge injection imbalance and severe quantum dot charging, which degrades device performance. Blocking excess injected electrons into quantum dots (QDs) is crucial for efficient inverted QLEDs. It is found that Polyethylenimine (PEI) has two opposite effect on electron injection, one is blocking electron injection by its intrinsic insulativity and the other one is promoting electron injection by the reduced work function of ZnO/PEI...
May 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28523319/amyloidosis-a-rare-cause-of-refractory-heart-failure-in-a-young-female
#16
Irina Iuliana Costache, Claudia Florida Costea, Mihai Danciu, Victor Vlad Costan, Viviana Aursulesei, Gabriela FlorenŢa Dumitrescu, Mihaela Dana Turliuc, Anca Sava
Cardiac amyloidosis may occur in any type of systemic amyloidosis. The clinical picture is often characterized by restrictive cardiomyopathy. We report the case of a 41-year-old female patient admitted to the Department of Cardiology with clinical signs of right heart failure: congested jugular veins, hepatomegaly, peripheral edema, ascites associated with atrial fibrillation, low values of arterial blood pressure and oliguria. Echocardiographic findings were helpful for the diagnosis of cardiac amyloidosis: enlarged atrial cavities, normal size ventricles, thickened ventricular septum and posterior left ventricle wall with normal left ventricular ejection fraction, mitral and tricuspid regurgitation...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28523012/growth-and-accumulation-of-secondary-metabolites-in-perilla-as-affected-by-photosynthetic-photon-flux-density-and-electrical-conductivity-of-the-nutrient-solution
#17
Na Lu, Emmanuel L Bernardo, Chayanit Tippayadarapanich, Michiko Takagaki, Natsuko Kagawa, Wataru Yamori
The global demand for medicinal plants is increasing. The quality of plants grown outdoors, however, is difficult to control. Myriad environmental factors influence plant growth and directly impact biosynthetic pathways, thus affecting the secondary metabolism of bioactive compounds. Plant factories use artificial lighting to increase the quality of medicinal plants and stabilize production. Photosynthetic photon flux density (PPFD) and electrical conductivity (EC) of nutrient solutions are two important factors that substantially influence perilla (Perilla frutescens, Labiatae) plant growth and quality...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28522838/fabrication-of-full-color-gan-based-light-emitting-diodes-on-nearly-lattice-matched-flexible-metal-foils
#18
Hyeryun Kim, Jitsuo Ohta, Kohei Ueno, Atsushi Kobayashi, Mari Morita, Yuki Tokumoto, Hiroshi Fujioka
GaN-based light-emitting diodes (LEDs) have been widely accepted as highly efficient solid-state light sources capable of replacing conventional incandescent and fluorescent lamps. However, their applications are limited to small devices because their fabrication process is expensive as it involves epitaxial growth of GaN by metal-organic chemical vapor deposition (MOCVD) on single crystalline sapphire wafers. If a low-cost epitaxial growth process such as sputtering on a metal foil can be used, it will be possible to fabricate large-area and flexible GaN-based light-emitting displays...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28522163/lncrna-malat1-sponges-mir-204-to-promote-osteoblast-differentiation-of-human-aortic-valve-interstitial-cells-through-up-regulating-smad4
#19
Xiaoxiong Xiao, Tingwen Zhou, Shichao Guo, Chao Guo, Qiao Zhang, Nianguo Dong, Yongjun Wang
BACKGROUND: Emerging evidences have indicated that long non-coding RNAs (lncRNAs) play vital roles in cardiovascular physiology and pathology. The lncRNA MALAT1, a highly abundant and conserved imprinted gene, has been implicated in many cardiovascular diseases. However, the function of MALAT1 in calcific aortic valve disease (CAVD) remains unknown. This study sought to document the function and underlying mechanism of MALAT1 in regulating CAVD. METHODS: Protein level was determined by immunoblotting and immunofluorescence staining...
May 10, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28519899/hepatic-aa-amyloidosis-in-a-cat-cytologic-and-histologic-identification-of-aa-amyloid-in-macrophages
#20
Sakurako Neo-Suzuki, Takayuki Mineshige, Junichi Kamiie, Hideki Kayanuma, Yukako Mochizuki, Masaharu Hisasue, Ryo Tsuchiya, Kinji Shirota
A 3-year-old, spayed female, Domestic Shorthair cat presented with anorexia, lethargy, vomiting, probable hemoabdomen, and multiple masses on the right lateral liver lobe. Clinicopathologic and imaging abnormalities included anemia, azotemia, icterus, and hepatomegaly with hypoechoic masses. On cytologic evaluation of a fine-needle aspiration of a liver mass there was abundant extracellular pink- to purple-colored material between hepatocytes. The amorphous material was stained with direct fast scarlet (DFS), and green birefringent areas were observed under polarized light, confirming the presence of amyloid...
May 18, 2017: Veterinary Clinical Pathology
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