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https://www.readbyqxmd.com/read/28938784/immunocastration-as-an-alternative-to-caponization-evaluation-of-its-effect-on-body-and-bone-development-and-on-meat-color-and-composition
#1
M A G Quaresma, I C Antunes, M F Ribeiro, S Prazeres, R J B Bessa, P Martins da Costa
Caponization is associated with some morbidity and mortality, which contributes to important economic losses. This practice is executed without any pain relief (neither anesthesia nor analgesia) and can be painful and without consideration of animal welfare. On the other hand, immunocastration accomplished by Improvac and Bovipriva in pigs and cattle represents a noninvasive procedure, and for that reason is regarded as an alternative with improved animal welfare. This study includes 4 experimental groups consisting of capons, slips, roosters, and birds submitted to the Improvac treatment...
October 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/28938056/short-term-effects-of-light-quality-on-leaf-gas-exchange-and-hydraulic-properties-of-silver-birch-betula-pendula
#2
Aigar Niglas, Kaisa Papp, Maciej Sekiewicz, Arne Sellin
Leaves have to acclimatize to heterogeneous radiation fields inside forest canopies in order to efficiently exploit diverse light conditions. Short-term effects of light quality on photosynthetic gas exchange, leaf water use and hydraulic traits were studied on Betula pendula Roth shoots cut from upper and lower thirds of the canopy of 39- to 35-year-old trees growing in natural forest stand, and illuminated with white, red or blue light in the laboratory. Photosynthetic machinery of the leaves developed in different spectral conditions acclimated differently with respect to incident light spectrum: the stimulating effect of complete visible spectrum (white light) on net photosynthesis is more pronounced in upper-canopy layers...
September 1, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28937927/the-effects-of-photobiomodulation-delivered-by-light-emitting-diode-on-stem-cells-from-human-exfoliated-deciduous-teeth-a-study-on-the-relevance-to-pluripotent-stem-cell-viability-and-proliferation
#3
Katia Llanos do Vale, Durvanei Augusto Maria, Lara Cristina Picoli, Alessandro Melo Deana, Marcelo Betti Mascaro, Raquel Agnelli Mesquita Ferrari, Sandra Kalil Bussadori, Kristianne Porta Santos Fernandes
OBJECTIVE: Photobiomodulation (PBM) can modulate the proliferation of some types of stem cells. However, few reports have addressed the effects of PBM delivered by light-emitting diode (LED) on stem cells obtained from the pulp tissue of deciduous teeth. The aim of the present study was to investigate the effect of PBM delivered by red LED (630 nm, 75 mW, 37 mW/cm(2)) with different radiant exposures on the cell cycle, mitochondrial membrane potential, and senescence of stem cells from human exfoliated deciduous teeth (SHED)...
September 21, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28936657/whole-mount-rna-fish-on-ovules-and-developing-seeds
#4
Andrea Bleckmann, Thomas Dresselhaus
A key element to understand developmental and reproductive processes like germline development, double fertilization, and embryogenesis is the study of cell-specific gene expression patterns which is best analyzed by RNA in situ hybridization. Different visualization techniques have been established to mark either the region of mRNA production (using the classical chromogenic detection system) or the specific localization of mRNAs (using fluorescent labeled probes). In this chapter, we describe and compare whole mount RNA in situ hybridization techniques on ovules and young developing seeds from Arabidopsis thaliana using three different detection systems...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28936338/photochemically-active-dna-intercalating-ruthenium-and-related-complexes-insights-by-combining-crystallography-and-transient-spectroscopy
#5
Christine J Cardin, John M Kelly, Susan J Quinn
Recent research on the study of the interaction of ruthenium polypyridyl compounds and defined sequence nucleic acids is reviewed. Particular emphasis is paid to complexes [Ru(LL)2(Int)](2+) containing potentially intercalating ligands (Int) such as dipyridophenazine (dppz), which are known to display light-switching or photo-oxidising behaviour, depending on the nature of the ancillary ligands. X-ray crystallography has made a key contribution to our understanding, and the first complete survey of structural results is presented...
July 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28935419/red-near-infrared-light-stimulates-release-of-an-endothelium-dependent-vasodilator-and-rescues-vascular-dysfunction-in-a-diabetes-model
#6
Agnes Keszler, Brian Lindemer, Dorothee Weihrauch, Deron Jones, Neil Hogg, Nicole L Lohr
Peripheral artery disease (PAD) is a morbid condition whereby ischemic peripheral muscle causes pain and tissue breakdown. Interestingly, PAD risk factors, e.g. diabetes mellitus, cause endothelial dysfunction secondary to decreased nitric oxide (NO) levels, which could explain treatment failures. Previously, we demonstrated 670nm light (R/NIR) increased NO from nitrosyl-heme stores, therefore we hypothesized R/NIR can stimulate vasodilation in healthy and diabetic blood vessels. Vasodilation was tested by ex vivo pressure myography in wild type C57Bl/6, endothelial nitric oxide synthase (eNOS) knockout, and db/db mice (10mW/cm(2) for 5min with 10min dark period)...
September 18, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28933533/luminescence-tuning-thermal-quenching-and-electronic-structure-of-narrow-band-red-emitting-nitride-phosphors
#7
Dianpeng Cui, Zhen Song, Zhiguo Xia, Quanlin Liu
Exploring high-performance narrow-band red-emitting phosphor is an important challenge for improving white light LEDs. Here, on the basis of three interesting nitride phosphors with similar vierer rings framework structure, two phosphor series, Eu(2+)-doped Sr(LiAl)1-xMg2xAl2N4 and Sr(LiAl3)1-y(Mg3Si)yN4 (x, y = 0-1), are successfully synthesized by a solid state reaction. They show narrow-band red emission with tunable emission peaks from 614 to 658 nm and 607 to 663 nm. The varying luminescence behaviors with composition and structure are discussed based on centroid shift, crystal field splitting and Stokes shift...
September 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28933148/frequency-selective-photobleaching-as-a-route-to-chromatic-control-in-supramolecular-oled-devices
#8
Yu-Tang Tsai, Hsiang-Fang Liu, Bo-Ji Peng, Kuo-Pi Tseng, Ming-Cheng Kuo, Ken-Tsung Wong, Guillaume Wantz, Lionel Hirsch, Guillaume Raffy, André Del Guerzo, Dario M Bassani
We report a series of molecules that spontaneously self-organize into small electroluminescent domains of sub-micrometer dimensions when dissolved in tetrahydrofuran. The self-assembled spherical aggregates have an average size of 300 nm in diameter and exhibit effient energy transfer from the blue to the green or red component. The aggregates can be chromatically addressed or patterned by selective bleaching the energy acceptor component using a laser source. This allows the fabrication of electroluminescence devices by directly photopatterning the active layer without the need of additional steps...
September 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28932168/the-structural-coloration-of-textile-materials-using-self-assembled-silica-nanoparticles
#9
Weihong Gao, Muriel Rigout, Huw Owens
The work presented investigates how to produce structural colours on textile materials by applying a surface coating of silica nanoparticles (SNPs). Uniform SNPs with particle diameters in a controlled micron size range (207-350 nm) were synthesized using a Stöber-based solvent varying (SV) method which has been reported previously. Photonic crystals (PCs) were formed on the surface of a piece of textile fabric through a process of natural sedimentation self-assembly of the colloidal suspension containing uniform SNPs...
2017: Journal of Nanoparticle Research: An Interdisciplinary Forum for Nanoscale Science and Technology
https://www.readbyqxmd.com/read/28931902/red-light-phenotype-in-a-marine-diatom-involves-a-specialized-oligomeric-red-shifted-antenna-and-altered-cell-morphology
#10
Miroslava Herbstová, David Bína, Radek Kaňa, František Vácha, Radek Litvín
Diatoms greatly contribute to carbon fixation and thus strongly influence the global biogeochemical balance. Capable of chromatic acclimation (CA) to unfavourable light conditions, diatoms often dominate benthic ecosystems in addition to their planktonic lifestyle. Although CA has been studied at the molecular level, our understanding of this phenomenon remains incomplete. Here we provide new data to better explain the acclimation-associated changes under red-enhanced ambient light (RL) in diatom Phaeodactylum tricornutum, known to express a red-shifted antenna complex (F710)...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931857/eu-3-activated-la2moo6-la2wo6-red-emitting-phosphors-with-ultrabroad-excitation-band-for-white-light-emitting-diodes
#11
Peng Du, Jae Su Yu
A series of novel Eu(3+)-activated La2MoO6-La2WO6 red-emitting phosphors have been successfully prepared by a citrate-assisted sol-gel process. Both photoluminescence excitation and emission spectra suggest that the resultant products have the strong ultrabroad absorption band ranging from 220 to 450 nm. Under the excitation of 379 nm, the characteristic emissions of Eu(3+) ions corresponding to the (5)D0 → (7)F J transitions are observed in the doped samples. The optimal doping concentration for Eu(3+) ions is found to be 12 mol% and the quenching mechanism is attributed to the dipole-dipole interaction...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28929966/-a-case-with-scalp-pruritus-caused-by-dermanysus-gallinae-order-mesostigmata
#12
Mustafa Şengül, Nida Kaçar, Mehmet Karaca, Sedef Zeliha Öner, Çağrı Ergin
Dermanyssus gallinae is one of the important hematophagous ectoparasite species of poultry like chicken, pigeon and wild bird species. These ectoparasites in the form of nymphs or adults who can not find their hosts are also seen in mammals and even in humans. For this reason, they are considered as important for public health. The ectoparasite causes a clinical condition named gamasoidosis among pet owners and people who live or work close to animal shelters, barns and chicken farms. Pruritus dermatitis is also caused by D...
July 2017: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28928817/dichloroacetate-induces-protective-autophagy-in-esophageal-squamous-carcinoma-cells
#13
Hong-Yu Jia, He-Nan Wang, Feng-Yu Xia, Yan Sun, Hong-Li Liu, Li-Li Yan, Shan-Shan Li, Dong-Chun Jiang, Mei-Mei Xu
Dichloroacetate (DCA) is an inhibitor of pyruvate dehydrogenase kinase, which promotes the flux of carbohydrates into mitochondria and enhances the aerobic oxidation of glucose. DCA has previously been demonstrated to exhibit antitumor properties. The present study revealed that treatment with DCA induced increased levels of autophagy-associated proteins in esophageal squamous carcinoma cells while minimally affecting apoptosis. The present study examined the localization of light chain (LC)-3 by adenovirus infection with a green fluorescent protein (FP)-red FP-LC3 reporter construction and confirmed that DCA treatment induced significant autophagy...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28928761/hormonal-regulation-in-shade-avoidance
#14
REVIEW
Chuanwei Yang, Lin Li
At high vegetation density, shade-intolerant plants sense a reduction in the red (660 nm) to far-red (730 nm) light ratio (R/FR) in addition to a general reduction in light intensity. These light signals trigger a spectrum of morphological changes manifested by growth of stem-like tissue (hypocotyl, petiole, etc.) instead of harvestable organs (leaves, fruits, seeds, etc.)-namely, shade avoidance syndrome (SAS). Common phenotypical changes related to SAS are changes in leaf hyponasty, an increase in hypocotyl and internode elongation and extended petioles...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28927933/azopolymer-photopatterning-for-directional-control-of-angiogenesis
#15
Chiara Fedele, Maria De Gregorio, Paolo A Netti, Silvia Cavalli, Chiara Attanasio
Understanding cellular behavior in response to microenvironmental stimuli is central to tissue engineering. An increasing number of reports emphasize the high sensitivity of cells to the physical characteristics of the surrounding milieu and in particular, topographical cues. In this work, we investigated the influence of dynamic topographic signal presentation on sprout formation and the possibility to obtain a space-time control over sprouting directionality without growth factors, in order to investigate the contribution of just topography in the angiogenic process...
September 16, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28926601/utility-of-abdominal-skin-plus-subcutaneous-fat-and-rectal-mucosal-biopsy-in-the-diagnosis-of-al-amyloidosis-with-renal-involvement
#16
Ting Li, Xianghua Huang, Shuiqin Cheng, Liang Zhao, Guisheng Ren, Wencui Chen, Qingwen Wang, Caihong Zeng, Zhihong Liu
OBJECTIVES: Skin fat biopsy of the abdominal wall is a simple and safe method for detecting amyloidosis, and rectal mucosal biopsy is also frequently used for screening for the disease; however, the sensitivity of these approaches has not been fully studied. The aim of this study was to evaluate the efficacy of skin fat biopsy combined with rectal mucosal biopsy as a screening procedure for the diagnosis of systemic immunoglobulin light-chain (AL) amyloidosis. METHODS: We retrospectively analyzed 224 AL amyloidosis patients confirmed by renal biopsy, including a test group of 165 patients and validation group of 59 patients...
2017: PloS One
https://www.readbyqxmd.com/read/28926231/resonance-emission-enhancement-ree-for-narrow-band-red-emitting-a2gef6-mn-4-a-na-k-rb-cs-phosphors-synthesized-via-a-precipitation-cation-exchange-route
#17
Hongzhou Lian, Qingming Huang, Yeqing Chen, Kai Li, Sisi Liang, Mengmeng Shang, Manman Liu, Jun Lin
Narrow band red-emitting A2GeF6:Mn(4+) (A = Na, K, Rb, Cs) phosphors were prepared through a two-step precipitation-cation exchange route using a K2MnF6 precursor as the Mn(4+) source. The phase purity, morphology, and constituent were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectric spectroscopy (XPS), and electron paramagnetic resonance (EPR) examination. Optical properties were investigated by photoluminescence spectra (PL and PLE) and high-resolution PL. A temperature-dependent PL examination was performed to investigate the electron-phonon coupling emission mechanism of Mn(4+) in these alkali fluorogermanates...
September 19, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28926075/high-efficiency-quantum-dot-light-emitting-diodes-from-positive-aging
#18
Krishna P Acharya, Alexandre Titov, Jake Hyvonen, Chenggong Wang, Jean Tokarz, Paul H Holloway
Colloidal quantum dot-polymer hybrid light emitting diodes (QLEDs) that exhibit external quantum efficiencies >12% for all three primary colors (21% from green) have been demonstrated. These high efficiencies result in part from a positive aging effect reported here for the first time, where positive aging means the efficiency of the QLED increased with time. We have achieved 470 h operational life time (T90) at 2550 nits for red QLEDs. At longer times, negative aging phenomena lead to lower luminance and limit the lifetime of the QLEDs...
September 19, 2017: Nanoscale
https://www.readbyqxmd.com/read/28925378/spectroscopically-forbidden-infra-red-emission-in-au-vertical-graphene-hybrid-nanostructures
#19
A K Sivadasan, Santanu Parida, Subrata Ghosh, Ramanathaswamy Pandian, Sandip Dhara
Implementation of Au nanoparticles (NPs) is a subject for frontier plasmonic research due to its fascinating optical properties. Herein, the present study deals with plasmonic assisted emission properties of Au NPs-vertical graphene (VG) hybrid nanostructures. The influence of effective polarizability of Au NPs on the surface enhanced Raman scattering and luminescence properties is investigated. In addition, a remarkable infra-red (IR) emission in the hybrid nanostructures is observed and interpreted on the basis of intra-band transitions in Au NPs...
September 19, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28924898/formation-of-tyrosine-radicals-in-photosystem-ii-under-far-red-illumination
#20
Nigar Ahmadova, Fikret Mamedov
Photosystem II (PS II) contains two redox-active tyrosine residues on the donor side at symmetrical positions to the primary donor, P680. TyrZ, part of the water-oxidizing complex, is a preferential fast electron donor while TyrD is a slow auxiliary donor to P680(+). We used PS II membranes from spinach which were depleted of the water oxidation complex (Mn-depleted PS II) to study electron donation from both tyrosines by time-resolved EPR spectroscopy under visible and far-red continuous light and laser flash illumination...
September 18, 2017: Photosynthesis Research
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