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https://www.readbyqxmd.com/read/28823073/effect-of-low-level-laser-therapy-%C3%AE-780%C3%A2-nm-on-the-mechanically-damaged-dentin-pulp-complex-in-a-model-of-extrusive-luxation-in-rat-incisors
#1
Dandara Andrade de Santana, Gabriela Ferraz Fonseca, Luciana Maria Pedreira Ramalho, Tânia Tavares Rodriguez, Marcio Cajazeira Aguiar
In order to regenerate the dental pulp, many strategies have been developed as phototherapy. In the pulp repair, we do not know if gallium-aluminum-arsenide (GaAlAs) laser preserves the primary odontoblasts or stimulates the formation of more dentin matrix when dental pulp is damaged. The aim of the present study was to examine the effect of laser phototherapy (λ780 nm) on vascularization, inflammation, density of the primary odontoblast layer, and formation of reactionary and reparative dentin in the dental pulp by provoking extrusion of the rat incisor...
August 19, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28820241/interactions-of-verkade-s-superbase-with-strong-lewis-acids-from-labile-mono-and-binuclear-lewis-acid-base-complexes-to-phosphenium-cations
#2
Suresh Mummadi, Dustin Kenefake, Rony Diaz, Daniel K Unruh, Clemens Krempner
A series of mono- and binuclear Lewis acid-base complexes of the formulas N[CH2CH2N(Pr(i))]3P→LA [LA = BH3 (8), Ga(C6F5)3 (10), GaCl3 (11)], LA←N[CH2CH2N(Pr(i))]3P [LA = Al(C6F5)3 (6a), AlMe3 (6b), AlEt3 (6c), AlBu(i)3 (6d), BF3 (13)], and LA←N[CH2CH2N(Pr(i))]3P→LA [Lewis acid (LA) = Al(C6F5)3 (7a), AlMe3 (7b), AlEt3 (7c), AlBu(i)3 (7d), AlCl3 (7e), BH3 (9)] were generated from reactions of Verkade's base, N[CH2CH2N(Pr(i))]3P (1), with various boron-, aluminum-, and gallium-containing Lewis acids, and characterized by multinuclear NMR spectroscopy...
August 18, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28815683/phase-imaging-quality-improvement-by-modification-of-afm-probes-cantilever
#3
J Skibinski, J Rebis, L Kaczmarek, T Wejrzanowski, T Plocinski, K Rozniatowski
Imaging of the surface of materials by atomic force microscopy under tapping and phase imaging mode, with use of modified probes is addressed. In this study, the circularly shaped holes located in varying distance from the probe base, were cut out by focused ion beam. Such modification was a consequence of the results of the previous experiments (probe tip sharpening and cantilever thinning) where significant improvement of image quality in tapping and phase imaging mode has been revealed. The solution proposed herein gives similar results, but is much simpler from the technological point of view...
August 16, 2017: Journal of Microscopy
https://www.readbyqxmd.com/read/28815429/investigation-on-surface-polarization-of-al2o3-capped-gan-algan-gan-heterostructure-by-angle-resolved-x-ray-photoelectron-spectroscopy
#4
Tian Li Duan, Ji Sheng Pan, Ning Wang, Kai Cheng, Hong Yu Yu
The surface polarization of Ga-face gallium nitride (GaN) (2 nm)/AlGaN (22 nm)/GaN channel (150 nm)/buffer/Si with Al2O3 capping layer is investigated by angle-resolved X-ray photoelectron spectroscopy (ARXPS). It is found that the energy band varies from upward bending to downward bending in the interface region, which is believed to be corresponding to the polarization variation. An interfacial layer is formed between top GaN and Al2O3 due to the occurrence of Ga-N bond break and Ga-O bond forming during Al2O3 deposition via the atomic layer deposition (ALD)...
August 17, 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28813368/electronic-transport-properties-of-graphene-doped-by-gallium
#5
Jindřich Mach, Pavel Procházka, Miroslav Bartošík, David Nezval, Jakub Piastek, Jan Hulva, Vojtěch Švarc, Martin Konečný, Lukáš Kormoš, Tomas Sikola
In this work we present the effect of low dose gallium (Ga) deposition (< 4 ML) performed in UHV (10-7 Pa) on the electronic doping and charge carrier scattering in graphene grown by chemical vapor deposition (CVD). In-situ graphene transport measurements performed with a graphene field-effect transistor (FET) structure show that at low Ga coverages a graphene layer tends to be strongly n-doped with an efficiency of 0.64 electrons per one Ga atom, while the further deposition and Ga cluster formation results in removing electrons from graphene (less n-doping)...
August 16, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28813001/dual-band-band-pass-filter-with-fixed-low-band-and-fluidically-tunable-high-band
#6
Eiyong Park, Daecheon Lim, Sungjoon Lim
In this work, we present a dual-band band-pass filter with fixed low-band resonant frequency and tunable high-band resonant frequency. The proposed filter consists of two split-ring resonators (SRRs) with a stub and microfluidic channels. The lower resonant frequency is determined by the length of the SRR alone, whereas the higher resonant frequency is determined by the lengths of the SRR and the stub. Using this characteristic, we fix the lower resonant frequency by fixing the SRR length and tune the higher resonant frequency by controlling the stub length by injecting liquid metal in the microfluidic channel...
August 16, 2017: Sensors
https://www.readbyqxmd.com/read/28812888/triply-bonded-gallium%C3%A2-phosphorus-molecules-theoretical-designs-and-characterization
#7
Jia-Syun Lu, Ming-Chung Yang, Ming-Der Su
The effect of substitution on the potential energy surfaces of triple-bonded RGa≡PR (R = F, OH, H, CH3, SiH3, SiMe(SitBu3)2, SiiPrDis2, Tbt (C6H2-2,4,6-{CH(SiMe3)2}3), and Ar* (C6H3-2,6-(C6H2-2,4,6-i-Pr3)2)) compounds was theoretically examined by using the density functional theory (i.e., M06-2X/Def2-TZVP, B3PW91/Def2-TZVP and B3LYP/LANL2DZ+dp). The theoretical evidences strongly suggest all of the triple-bonded RGa≡PR species prefer to select a bent form with an angle (∠Ga-P-R) of about 90°. Moreover, the theoretical observations indicate only the bulkier substituents, in particular for the strong donating groups (e...
August 16, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28808575/reduced-ventilation-perfusion-v-q-mismatch-following-endobronchial-valve-insertion-demonstrated-by-gallium-68-v-q-photon-emission-tomography-computed-tomography
#8
Paul Leong, Pierre-Yves Le Roux, Jason Callahan, Shankar Siva, Michael S Hofman, Daniel P Steinfort
Endobronchial valves (EBVs) are increasingly deployed in the management of severe emphysema. Initial studies focussed on volume reduction as the mechanism, with subsequent improvement in forced expiratory volume in 1 s (FEV1). More recent studies have emphasized importance of perfusion on predicting outcomes, though findings have been inconsistent. Gallium-68 ventilation-perfusion (V/Q) photon emission tomography (PET)/computed tomography (CT) is a novel imaging modality with advantages in spatial resolution, quantitation, and speed over conventional V/Q scintigraphy...
September 2017: Respirology Case Reports
https://www.readbyqxmd.com/read/28800286/clinical-pet-imaging-in-prostate-cancer
#9
Kathryn L Wallitt, Sairah R Khan, Suraiya Dubash, Henry H Tam, Sameer Khan, Tara D Barwick
Prostate cancer is the second most common cancer in men worldwide, with a wide spectrum of biologic behavior ranging from indolent low-risk disease to highly aggressive castration-resistant prostate cancer. Conventional imaging with computed tomography, magnetic resonance imaging, and bone scintigraphy is limited for the detection of nodal disease and distant bone metastases. In addition, advances in the available therapeutic options, both localized and systemic, drive the requirement for precise diagnostic and prognostic tools to refine the individual therapeutic approach at various times in the management of patients with prostate cancer...
August 11, 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28799116/targeting-endothelial-cells-with-multifunctional-gan-fe-nanoparticles
#10
Tudor Braniste, Ion Tiginyanu, Tibor Horvath, Simion Raevschi, Birgit Andrée, Serghei Cebotari, Erin C Boyle, Axel Haverich, Andres Hilfiker
In this paper, we report on the interaction of multifunctional nanoparticles with living endothelial cells. The nanoparticles were synthesized using direct growth of gallium nitride on zinc oxide nanoparticles alloyed with iron oxide followed by core decomposition in hydrogen flow at high temperature. Using transmission electron microscopy, we demonstrate that porcine aortic endothelial cells take up GaN-based nanoparticles suspended in the growth medium. The nanoparticles are deposited in vesicles and the endothelial cells show no sign of cellular damage...
August 10, 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28798227/novel-pet-tracer-68-ga-dotatate-pet-ct-can-be-alternative-imaging-method-in-patients-with-insulinomas
#11
Şadiye Altun Tuzcu, Zafer Pekkolay, Faruk Kılınç, Alpaslan Kemal Tuzcu
Insulinomas are the most common cause of hypoglycemia resulting from endogenous hyperinsulinism. The diagnosis of insulinoma is established by demonstrating inappropriately high serum insulin concentrations during a spontaneous or induced episode of hypoglycaemia. Most of the insulinomas are islet-cell tumors. They are often small (less than 2 cm), benign, and difficult to localize with current imaging techniques. The non-invasive procedures such as transabdominal ultrasonography, spiral computed tomography (CT), magnetic resonance imaging (MRI), 111-In-pentetreotide imaging, fluorine-18-L-dihydroxyphenylalanine positron emission tomography ((18)F-DOPA PET) and invasive procedures such as endoscopic ultrasonography or a selective arterial calcium stimulation test (SACST) with hepatic venous sampling can be used to show insulinomas...
August 10, 2017: Journal of Nuclear Medicine Technology
https://www.readbyqxmd.com/read/28796522/on-chip-waveguide-coupling-of-a-layered-semiconductor-single-photon-source
#12
Philipp Tonndorf, Osvaldo Del Pozo-Zamudio, Nico Gruhler, Johannes Kern, Robert Schmidt, Alexander I Dmitriev, Anatoly P Bakhtinov, Alexander I Tartakovskii, Wolfram Pernice, Steffen Michaelis de Vasconcellos, Rudolf Bratschitsch
Fully integrated quantum technology based on photons is in the focus of current research, because of its immense potential concerning performance and scalability. Ideally, the single-photon sources, the processing units, and the photon detectors are all combined on a single chip. Impressive progress has been made for on-chip quantum circuits and on-chip single-photon detection. In contrast, nonclassical light is commonly coupled onto the photonic chip from the outside, because presently only few integrated single-photon sources exist...
August 18, 2017: Nano Letters
https://www.readbyqxmd.com/read/28791587/what-is-this-image-2017-image%C3%A2-2-result-coronary-stent-infection-diagnosed-by-gallium-scan
#13
Alexander Elder, Kuan-Ching Ho, Kevin C Allman, Harry Lowe, David Amos, Mark Adams
No abstract text is available yet for this article.
August 8, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28782027/gallium-isotopic-evidence-for-extensive-volatile-loss-from-the-moon-during-its-formation
#14
Chizu Kato, Frédéric Moynier
The distribution and isotopic composition of volatile elements in planetary materials holds a key to the characterization of the early solar system and the Moon's formation. The Moon and Earth are chemically and isotopically very similar. However, the Moon is highly depleted in volatile elements and the origin of this depletion is still debated. We present gallium isotopic and elemental measurements in a large set of lunar samples to constrain the origin of this volatile depletion. We show that while Ga has a geochemical behavior different from zinc, both elements show a systematic enrichment in the heavier isotopes in lunar mare basalts and Mg-suite rocks compared to the silicate Earth, pointing to a global-scale depletion event...
July 2017: Science Advances
https://www.readbyqxmd.com/read/28781308/systemic-sarcoidosis-with-thyroid-involvement
#15
Hideyuki Okuma, Koshi Hashimoto, Xin Wang, Noriaki Ohkiba, Nozomi Murooka, Norikazu Akizuki, Takeshi Inazawa, Yoshihiro Ogawa
A 66-year-old woman, who was diagnosed with iritis, visited our hospital due to general malaise. A blood analysis revealed hypercalcemia. Computed tomography revealed mediastinal and hilar lymph node hyperplasia. Moreover, (67)Gallium scintigraphy demonstrated strong accumulation in the lesions, suggesting sarcoidosis. A core needle biopsy (CNB) of the hypoechoic areas of the thyroid was performed because the patient refused to undergo a bronchoscopic examination. The scattering of slightly acidophilic epithelioid cell granulomas was observed in the pathological examination of the biopsy specimen...
August 1, 2017: Internal Medicine
https://www.readbyqxmd.com/read/28776510/m-3-h2aso4-h2as2o7-m-3-al-ga-and-in2-h2aso4-2-h2as2o7-2-a-new-layer-structure-type-and-a-new-framework-structure-type-containing-the-rare-h2as2o7-2-group
#16
Karolina Schwendtner, Uwe Kolitsch
The crystal structures of hydrothermally synthesized aluminium dihydrogen arsenate(V) dihydrogen diarsenate(V), Al(H2AsO4)(H2As2O7), gallium dihydrogen arsenate(V) dihydrogen diarsenate(V), Ga(H2AsO4)(H2As2O7), and diindium bis[dihydrogen arsenate(V)] bis[dihydrogen diarsenate(V)], In2(H2AsO4)2(H2As2O7)2, were determined from single-crystal X-ray diffraction data collected at room temperature. The first two compounds are representatives of a novel sheet structure type, whereas the third compound crystallizes in a novel framework structure...
August 1, 2017: Acta Crystallographica. Section C, Structural Chemistry
https://www.readbyqxmd.com/read/28776139/catching-the-zebra-clinical-pearls-and-pitfalls-for-the-successful-diagnosis-of-zollinger-ellison-syndrome
#17
REVIEW
Aaron H Mendelson, Mark Donowitz
Zollinger-Ellison syndrome (ZES) results from an ectopic gastrin-secreting tumor leading to peptic ulcer disease, reflux, and chronic diarrhea. While early recognition portends an excellent prognosis with >80% survival at 15 years, symptoms are often nonspecific making the diagnosis difficult to establish. Diagnosis involves a series of tests, including fasting gastrin, gastric pH, chromogranin A, and secretin stimulation. Performing these tests in the correct sequence and at the proper time is essential to avoid inaccurate results...
August 3, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28775347/liquid-metal-amoeba-with-spontaneous-pseudopodia-formation-and-motion-capability
#18
Liang Hu, Bin Yuan, Jing Liu
The unique motion of amoeba with a deformable body has long been an intriguing issue in scientific fields ranging from physics, bionics to mechanics. So far, most of the currently available artificial machines are still hard to achieve the complicated amoeba-like behaviors including stretching pseudopodia. Here through introducing a multi-materials system, we discovered a group of very unusual biomimetic amoeba-like behaviors of self-fueled liquid gallium alloy on the graphite surface immersed in alkaline solution...
August 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28775203/immunohistochemical-validation-of-psma-expression-measured-by-68-ga-psma-pet-ct-in-primary-prostate-cancer
#19
Nadine Woythal, Ruza Arsenic, Carsten Kempkensteffen, Kurt Miller, Jan-Carlo Janssen, Kai Huang, Marcus R Makowski, Winfried Brenner, Vikas Prasad
Aim: Gallium 68 ((68)Ga) prostate specific membrane antigen (PSMA) positron emission tomography/computed tomography ((68)Ga-PSMA PET/CT) has a proven role in staging and restaging of prostate cancer (PCA) patients. The aims of this study were to evaluate the association of intraprostatic (68)Ga-PSMA PET/CT (PET) findings and prostate specific membrane antigen (PSMA) expression in immunohistochemical staining (IHC) and generate a cut-off value for the differentiation between benign prostate tissue from PCA. Methods: Data of 31 patients (mean 67...
August 3, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28774108/optoelectronic-properties-and-the-electrical-stability-of-ga-doped-zno-thin-films-prepared-via-radio-frequency-sputtering
#20
Shien-Uang Jen, Hui Sun, Hai-Pang Chiang, Sheng-Chi Chen, Jian-Yu Chen, Xin Wang
In this work, Ga-doped ZnO (GZO) thin films were deposited via radio frequency sputtering at room temperature. The influence of the Ga content on the film's optoelectronic properties as well as the film's electrical stability were investigated. The results showed that the film's crystallinity degraded with increasing Ga content. The film's conductivity was first enhanced due to the replacement of Zn(2+) by Ga(3+) before decreasing due to the separation of neutralized gallium atoms from the ZnO lattice. When the Ga content increased to 15...
December 6, 2016: Materials
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