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https://www.readbyqxmd.com/read/28212485/efficient-upconverting-multiferroic-core-shell-photocatalysts-visible-to-near-infrared-photon-harvesting
#1
Jianming Zhang, Yue Huang, Lei Jin, Federico Rosei, Fiorenzo Vetrone, Jerome P Claverie
We report the two-step synthesis of a core@shell nanohybrid material for visible-to-near-infrared (NIR) photocatalysis. The core is constituted of NaGdF4:Er(3+), Yb(3+) upconverting nanoparticles (UCNPs). A bismuth ferrite (BFO) shell is assembled around the UCNPs via a hydrothermal process. The photocatalytic degradation assays of organic compounds of methylene orange and 4-chlorophenol reveal that core@shell nanostructures possess remarkably enhanced reaction activity under visible and NIR irradiation, compared to the BFO powder alone and the BFO-UCNP mixture...
February 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28212077/robust-guided-image-filtering-using-nonconvex-potentials
#2
Bumsub Ham, Minsu Cho, Jean Ponce
Filtering images using a guidance signal, a process called guided or joint image filtering, has been used in various tasks in computer vision and computational photography, particularly for noise reduction and joint upsampling. This uses an additional guidance signal as a structure prior, and transfers the structure of the guidance signal to an input image, restoring noisy or altered image structure. The main drawbacks of such a data-dependent framework are that it does not consider structural differences between guidance and input images, and that it is not robust to outliers...
February 14, 2017: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28212036/development-of-ion-conductive-and-vapoluminescent-porous-coordination-polymers-composed-of-ruthenium-ii-metalloligand
#3
Ayako Watanabe, Atsushi Kobayashi, Erika Saitoh, Yuki Nagao, Shun Omagari, Takayuki Nakanishi, Yasuchika Hasegawa, W M C Sameera, Masaki Yoshida, Masako Kato
We synthesized two new porous coordination polymers (PCPs) {Ln7(OH)5[Ru(dcbpy)3]4·4nH2O} (Ln7-Ru4; Ln = Ce, Nd) composed of the luminescent ruthenium(II) metalloligand [Ru(4,4'-dcbpy)3](4-) ([4Ru]; 4,4'-dcbpy = 4,4'-dicarboxy-2,2'-bipyridine) and lanthanide ions Ln(3+) (Ln = Ce, Nd). These two PCPs Ln7-Ru4 are isomorphous with the previously reported PCP La7-Ru4, and the lattice constants (a, c, and unit cell volume V) changed systematically according to the lanthanide contraction. All three Ln7-Ru4 compounds have OH(-) anion containing porous structures and a large number of hydrate water molecules within the pores, resulting in moderate ion conductivities (10(-6)-10(-7) S cm(-1)) at 90% relative humidity (RH) and 298 K...
February 17, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28211850/subthalamic-neurons-encode-both-single-and-multi-limb-movements-in-parkinson-s-disease-patients
#4
Ariel Tankus, Ido Strauss, Tanya Gurevich, Anat Mirelman, Nir Giladi, Itzhak Fried, Jeffrey M Hausdorff
The subthalamic nucleus (STN) is the main target for neurosurgical treatment of motor signs of Parkinson's disease (PD). Despite the therapeutic effect on both upper and lower extremities, its role in motor control and coordination and its changes in Parkinson's disease are not fully clear. We intraoperatively recorded single unit activity in ten patients with PD who performed repetitive feet or hand movements while undergoing implantation of a deep brain stimulator. We found both distinct and overlapping representations of upper and lower extremity movement kinematics in subthalamic units and observed evidence for re-routing to a multi-limb representation that participates in limb coordination...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28208666/the-mechanisms-and-biomedical-applications-of-an-nir-bodipy-based-switchable-fluorescent-probe
#5
Bingbing Cheng, Venugopal Bandi, Shuai Yu, Francis D'Souza, Kytai T Nguyen, Yi Hong, Liping Tang, Baohong Yuan
Highly environment-sensitive fluorophores have been desired for many biomedical applications. Because of the noninvasive operation, high sensitivity, and high specificity to the microenvironment change, they can be used as excellent probes for fluorescence sensing/imaging, cell tracking/imaging, molecular imaging for cancer, and so on (i.e., polarity, viscosity, temperature, or pH measurement). In this work, investigations of the switching mechanism of a recently reported near-infrared environment-sensitive fluorophore, ADP(CA)₂, were conducted...
February 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28208117/percutaneous-transcatheter-therapies-for-the-management-of-left-ventricular-assist-device-complications
#6
Rohan J Kalathiya, Jonathan Grinstein, Nir Uriel, Atman P Shah
Heart failure is a growing epidemic in the United States and throughout the world. The utilization of continuous-flow left ventricular assist devices (LVADs) has greatly increased over the last decade. In addition, a limited supply of organ donors has led to a rise in the use, and duration, of LVADs for destination therapy. The increased use of LVAD therapy has led to the observation of mechanical complications such as device thrombosis, de novo aortic insufficiency, and outflow graft stenosis, all of which are associated with prolonged LVAD support...
February 15, 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/28207252/metal-metal-bridging-using-the-dppp-dye-system-electronic-configurations-within-multiple-redox-series
#7
Arijit Singha Hazari, Abhishek Mandal, Katharina Beyer, Alexa Paretzki, Wolfgang Kaim, Goutam Kumar Lahiri
Redox series [LnRu(μ-DPPP)RuLn](k), H2DPPP = 2,5-dihydro-3,6-di-2-pyridylpyrrolo(3,4-c)pyrrole-1,4-dione and L = 2,4-pentanedionato (acac(-)), 2,2'-bipyridine (bpy), and 2-phenylazopyridine (pap), have been studied by voltammetry (CV, DPV), EPR, and UV-vis-NIR spectroelectrochemistry, supported by TD-DFT calculations. Crystal structure analysis and (1)H NMR revealed oxidation states [(acac)2Ru(III)(μ-DPPP(2-))Ru(III)(acac)2] and [(bpy)2Ru(II)(μ-DPPP(2-))Ru(II)(bpy)2](2+) for the corresponding precursors, isolated as rac diastereomers...
February 16, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28207021/lmct-facilitated-room-temperature-phosphorescence-and-energy-transfer-in-substituted-thiophenolates-of-gd-and-yb
#8
Vasily A Ilichev, Anton V Rozhkov, Roman V Rumyantcev, Georgy K Fukin, Ivan D Grishin, Artem V Dmitriev, Dmitry A Lypenko, Eugeny I Maltsev, Artem N Yablonskiy, Boris A Andreev, Mikhail N Bochkarev
To obtain luminescent lanthanide complexes with a low energy LMCT state the 2-(2'-mercaptophenyl)benzothiazolates, Ln(SSN)3, and 2-(2'-mercaptophenyl)benzoxazolates, Ln2(OSN)6 (Ln = Gd, Yb), were synthesized by the reaction of amides Ln[N(SiMe3)2]3 with respective thiophenols. Ytterbium complexes were structurally characterized by X-ray diffraction analysis. Cyclic voltammetry revealed that the deprotonated mercaptophenyl ligands have significantly lower oxidation potentials than their phenoxy analogues and some β-diketones...
February 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28205609/association-of-fronto-temporal-function-with-cognitive-ability-in-schizophrenia
#9
Shenghong Pu, Kazuyuki Nakagome, Masashi Itakura, Masaaki Iwata, Izumi Nagata, Koichi Kaneko
Deficits in neuropsychological performance are common in schizophrenia, but their relationship with the fronto-temporal functional abnormalities associated with this condition remains unclear. We explored the relationship between neuropsychological performance as measured using the Brief Assessment of Cognition in Schizophrenia (BACS) and the Social Cognition Screening Questionnaire theory of mind (ToM) subscale and fronto-temporal function in 23 patients with schizophrenia and 23 age- and gender-matched healthy controls (HCs), using 52-channel near-infrared spectroscopy (NIRS)...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28205420/tetrabutylammonium-salts-of-aluminum-iii-and-gallium-iii-phthalocyanine-radical-anions-bonded-with-fluoren-9-olato%C3%AF-anions-and-indium-iii-bromide-phthalocyanine-radical-anions
#10
Dmitri Konarev, Salavat Khasanov, Manabu Ishikawa, Yoshiaki Nakano, Akihiro Otsuka, Hideki Yamochi, Gunzi Saito, Rimma N Lyubovskaya
Reduction of aluminum(III), gallium(III) and indium(III) chloride phthalocyanines by sodium fluorenone ketyl in the presence of tetrabutylammonium cations yielded crystalline salts (Bu4N+)2[M(III)(HFl-O-)(Pc*3-)](*-)(Br-).1.5C6H4Cl2 (M = Al (1), Ga(2), HFl-O- = Fluoren-9-olato- anion) and (Bu4N+)[In(III)Br(Pc*3-)]*-.0.875C6H4Cl2.0.125C6H14 (3). The salts contain Pc(*3-) radical anions with negatively charged phthalocyanine macrocycles evidenced by the presence of intense bands of (Pc*3-) in the NIR range and noticeable blue shift of both Q- and Soret bands of phthalocyanine...
February 15, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28204843/bread-wheat-milling-behavior-effects-of-genetic-and-environmental-factors-and-modeling-using-grain-mechanical-resistance-traits
#11
François-Xavier Oury, P Lasme, C Michelet, A Dubat, O Gardet, E Heumez, B Rolland, M Rousset, J Abecassis, C Bar L'Helgouac'h, V Lullien-Pellerin
Genetic (Pinb-D1 alleles) and environment (through vitreousness) have important effects on bread wheat milling behavior. SKCS optimal values corresponding to soft vitreous or hard mealy grains were defined to obtain the highest total flour yield. Near-isogenic lines of bread wheat that differ in hardness, due to distinct puroindoline-b alleles (the wild type, Pinb-D1a, or the mutated forms, Pinb-D1b or Pinb-D1d), were grown in different environments and under two nitrogen fertilization levels, to study genetic and environmental effects on milling behavior...
February 15, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28203647/the-potential-of-blue-lupins-as-a-protein-source-in-the-diets-of-laying-hens
#12
Michael R F Lee, Sarah Parkinson, Hannah R Fleming, Vince J Theobald, Dave K Leemans, Tony Burgess
Layers diets typically contain 15-20% soya due to its high crude protein content (ca. 36%). Reliance on soya for protein can result in large increases in cost of feed due to the law of supply and demand as a global commodity. Lupin grains have high protein content (35-40%) but previous experience with white lupins has shown toxic effects in poultry due to high levels alkaloids and poor performance due to anti-nutritional Non-starch polysaccharides (NSP). Here blue lupins either processed or whole were trialled for their potential as a protein source...
December 2016: Veterinary and Animal Science
https://www.readbyqxmd.com/read/28199219/clinical-applications-of-near-infrared-diffuse-correlation-spectroscopy-and-tomography-for-tissue-blood-flow-monitoring-and-imaging
#13
Yu Shang, Ting Li, Guoqiang Yu
Near-infrared (NIR) light enables the deep tissue investigation of microvascular hemodynamics. Blood flow is one such available observable promoting a wealth of physiological insight both individually and in combination with other metrics. Diffuse correlation spectroscopy (DCS) and, to a lesser extent, diffuse correlation tomography (DCT), have received interest over the past two decades as noninvasive methods for tissue blood flow measurement and imaging. DCS employs coherent point-illumination NIR light to penetrate deep tissues and commonly uses avalanche photodiodes to detect temporal speckle fluctuations of the diffuse light in a single speckle area of tissue surface, which are sensitive to the motions of red blood cells in the microvasculature of the detected tissue volume...
February 15, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28199044/prognostic-markers-in-metastatic-cutaneous-squamous-cell-carcinoma-of-the-head-and-neck
#14
Nir Hirshoren, Julia Danne, Benjamin John Dixon, Matthew Magarey, Stephen Kleid, Angela Webb, Albert Tiong, June Corry, David Gyorki
BACKGROUND: The minority of head and neck cutaneous squamous cell carcinomas (SCC) metastasize to regional lymph nodes. The purpose of this study was to describe the clinical outcomes and prognostic factors for patients with node-positive head and neck cutaneous SCC who underwent lymphadenectomy. METHODS: We conducted a retrospective single center study using the Kaplan-Meier method for the investigation of the overall survival (OS) and locoregional control rates...
February 15, 2017: Head & Neck
https://www.readbyqxmd.com/read/28198847/tuning-of-near-infrared-to-near-infrared-luminescence-from-one-photon-to-two-photon-anti-stokes-shift-in-ca-sub-3-sub-ga-sub-2-sub-sub-x-sub-cr-sub-x-sub-ge-sub-3-sub-o-sub-12-sub-via-varying-cr-sup-3-sup-content
#15
Huihong Lin, Ting Yu, Gongxun Bai, Qinyuan Zhang, Jianhua Hao
Near-infrared-to-near-infrared (NIR-to-NIR) anti-Stokes luminescence from Cr<sup>3+</sup> singly doped Ca<sub>3</sub>Ga<sub>2</sub>Ge<sub>3</sub>O<sub>12</sub> (CGGG) occurs under the excitation of an 808 nm diode laser. The anti-Stokes processes vary from one photon to two photon, depending on the Cr<sup>3+</sup> content (x) in Ca<sub>3</sub>Ga<sub>2-x</sub>Cr<sub>x</sub>Ge<sub>3</sub>O<sub>12</sub>...
February 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28198834/narrowband-carrier-envelope-phase-stable-mid-infrared-pulses-at-wavelengths-beyond-10%C3%A2-%C3%A2-%C3%AE-m-by-chirped-pulse-difference-frequency-generation
#16
A Cartella, T F Nova, A Oriana, G Cerullo, M Först, C Manzoni, A Cavalleri
We report on the generation of narrowband carrier-envelope phase stable mid-infrared (MIR) pulses between 10 and 15 μm. High pulse energies and narrow bandwidths are required for the selective nonlinear excitation of collective modes of matter that is not possible with current sources. We demonstrate bandwidths of <2% at 12.5 μm wavelength through difference frequency generation between two near-infrared (NIR) pulses, which are linearly chirped. We obtain a reduction in bandwidth by one order of magnitude, compared to schemes that make use of transform-limited NIR pulses...
February 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28198587/hexaphyrin-as-a-potential-theranostic-dye-for-photothermal-therapy-and-19f-magnetic-resonance-imaging
#17
Tomohiro Higashino, Hirotaka Nakatsuji, Ryosuke Fukuda, Haruki Okamoto, Hirohiko Imai, Tetsuya Matsuda, Hidehito Tochio, Masahiro Shirakawa, Nikolai Tkachenko, Mitsuru Hashida, Tatsuya Murakami, Hiroshi Imahori
meso-Aryl substituted expanded porphyrins have two potential key features suitable for theranostic agents, excellent absorption in near infrared (NIR) region and possible introduction of multiple fluorine atoms at structurally nearly equivalent positions. Herein, hexaphyrin (hexa) was synthesized using 2,6-bis(trifluoromethyl)-4-formyl benzoate and pyrrole and evaluated as a novel theranostic expanded porphyrin possessing the above key features. Under NIR light illumination hexa showed intense photothermal and weak photodynamic effects, which were most likely due to its low-lying excited states close to a singlet oxygen...
February 15, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28198492/redox-state-manipulation-of-a-tris-p-tetrazolylphenyl-amine-ligand-and-its-mn-2-coordination-frameworks
#18
Carol Hua, Jing-Yuan Ge, Floriana Tuna, David Collison, Jing-Lin Zuo, Deanna M D'Alessandro
In situ spectroelectrochemical experiments coupled with UV/Vis/NIR, EPR, magnetism and fluorescence techniques have enabled insights into the electronic properties of the tris(p-tetrazolylphenyl)amine (H3TTPA) ligand and the new Mn(2+) frameworks [Mn3(TTPA)2(MeOH)6]n (1) and [Mn3(TTPA)2(DMF)6]n (2). Oxidation of H3TTPA generated the triarylamine radical which was found to be delocalised throughout the ligand backbone. Solid state Vis/NIR and EPR spectroelectrochemical experiments on the frameworks were used to probe the optical properties of the accessible redox states and their relative stabilities, as well as the charge transfer interactions which were generated upon infiltration of electron acceptor guests...
February 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28198432/all-nitride-alxga1-xn-mn-gan-distributed-bragg-reflectors-for-the-near-infrared
#19
Giulia Capuzzo, Dmytro Kysylychyn, Rajdeep Adhikari, Tian Li, Bogdan Faina, Aitana Tarazaga Martín-Luengo, Alberta Bonanni
Since the technological breakthrough prompted by the inception of light emitting diodes based on III-nitrides, these material systems have emerged as strategic semiconductors not only for the lighting of the future, but also for the new generation of high-power electronic and spintronic devices. While III-nitride optoelectronics in the visible and ultraviolet spectral range is widely established, all-nitride efficient devices in the near-infrared (NIR) are still wanted. Here, through a comprehensive protocol of design, modeling, epitaxial growth and in-depth characterization, we develop AlxGa1-xN:Mn/GaN NIR distributed Bragg reflectors and we show their efficiency in combination with GaN:(Mn,Mg) layers containing Mn-Mgk complexes optically active in the near-infrared range of wavelengths...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28196324/delivery-of-liposomal-quantum-dots-via-monocytes-for-imaging-of-inflamed-tissue
#20
Gil Aizik, Nir Waiskopf, Majd Agbaria, Yael Levi-Kalisman, Uri Banin, Gershon Golomb
Quantum Dots (QDs), semiconductor nanocrystals, are fluorescent nanoparticles of growing interest as an imaging tool of a diseased tissue. However, a major concern is their biocompatibility, cytotoxicity and fluorescence instability in biological milieu, impeding their use in biomedical applications, in general, and for inflammation imaging, in particular. In addition, for an efficient fluorescent signal at the desired tissue, and avoiding systemic biodistribution and possible toxicity, targeting is desired...
February 14, 2017: ACS Nano
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