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Marguerite T Parisi, Jeffrey P Otjen, A Luana Stanescu, Barry L Shulkin
With the exception of radiolabeled monoclonal antibodies, antibody fragments and radiolabeled peptides which have seen little application in the pediatric population, the nuclear medicine imaging procedures used in the evaluation of infection and inflammation are the same for both adults and children. These procedures include (1) either a two- or a three-phase bone scan using technetium-99m methylene diphosphonate; (2) Gallium 67-citrate; (3) in vitro radiolabeled white blood cell imaging (using 111 Indium-oxine or 99m Technetium hexamethyl-propylene-amine-oxime-labeled white blood cells); and (4) hybrid imaging with 18 F-FDG...
March 2018: Seminars in Nuclear Medicine
Meera Raghavan, Elena Lazzeri, Christopher J Palestro
Spondylodiscitis is an infection of the vertebral body or disc and may also involve the epidural space, posterior elements, and paraspinal soft tissues. It is a cause of morbidity and mortality, and warrants early diagnosis and prompt treatment. Diagnosis can be difficult because of nonspecific signs and symptoms. Magnetic resonance imaging is sensitive and specific and is the imaging modality of choice for spondylodiscitis. Gadolinium contrast can show the extent of soft tissue and bone phlegmon and abscess...
March 2018: Seminars in Nuclear Medicine
Karim Khan, Ayesha Khan Tareen, Sayed Elshahat, Ashish Yadav, Usman Khan, Minghui Yang, Luigi Bibbò, Zhengbiao Ouyang
One of the greatest challenges in the enhancement of the electrical properties of conductive mayenite [Ca 24 Al 28 O 64 ] 4+ (4e - ) (hereinafter C12A7:e - ) is the design of a more suitable/simple synthesis strategy that can be employed to obtain the required properties such as excellent stable electrical conductivity, a high electron concentration, outstanding mobility, and an exceptionally large surface area. Therefore, to synthesize C12A7:e - in the metallic state, we proposed a facile, direct synthesis strategy based on an optimized sol-gel combustion method under a nitrogen gas environment using the low-cost precursors Ca(NO 3 ) 2 ·4H 2 O and Al(NO 3 ) 3 ·9H 2 O...
February 16, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Chien-Hung Wu, Kow-Ming Chang, Yi-Ming Chen, Bo-Wen Huang, Yu-Xin Zhang, Shui-Jinn Wang, Jui-Mei Hsu
Atmospheric pressure plasma-enhanced chemical vapor deposition (AP-PECVD) was employed for the fabrication of indium gallium zinc oxide thin-film transistors (IGZO TFTs) with high transparent gallium zinc oxide (GZO) source/drain electrodes. The influence of post-deposition annealing (PDA) temperature on GZO source/drain and device performance was studied. Device with a 300 °C annealing demonstrated excellent electrical characteristics with on/off current ratio of 2.13 × 108, saturation mobility of 10 cm2/V-s, and low subthreshold swing of 0...
March 1, 2018: Journal of Nanoscience and Nanotechnology
Chien-Hung Wu, Kow-Ming Chang, Yi-Ming Chen, Bo-Wen Huang, Yu-Xin Zhang, Shui-Jinn Wang
Atmospheric pressure plasma-enhanced chemical vapor deposition (AP-PECVD) technique and KrF excimer laser annealing (ELA) were employed for the fabrication of indium gallium zinc oxide thin-film transistors (IGZO-TFTs). Device with a 150 mJ/cm2 laser annealing densities demonstrated excellent electrical characteristics with improved on/off current ratio of 4.7×107, high channel mobility of 10 cm2/V-s, and low subthreshold swing of 0.15 V/dec. The improvements are attributed to the adjustment of oxygen vacancies in the IGZO channel to an appropriate range of around 28...
March 1, 2018: Journal of Nanoscience and Nanotechnology
M Myilsamy, M Mahalakshmi, N Subha, V Murugesan
Gallium doped mesoporous TiO2 with different weight percentages were synthesized by sol-gel method using Pluronic P123 as the structure directing template. The physico-chemical properties of all the synthesized catalysts were determined by XRD, TEM, SEM-EDAX, N2 adsorption-desorption studies, XPS, UV-vis DRS, FT-IR and photoluminescence spectroscopy. 1.0 wt% Ga-TiO2 exhibited the highest photocatalytic efficiency among all the synthesized materials under visible light due to the high surface area, reduced band gap and suppressed electron-hole recombination...
February 1, 2018: Journal of Nanoscience and Nanotechnology
Elena Petracovschi, Laurent Calvez, Laurent Cormier, David LE Coq, Jincheng Du
The short and medium range structures of the 80GeSe2-20Ga2Se3 (or Ge23.5Ga11.8Se64.7) chalcogenide glasses have been studied by combining ab initio molecular dynamics (AIMD) simulations and experimental neutron diffraction studies. Structure factor and total correlation function were calculated from glass structures generated from AIMD simulations and compared with neutron diffraction experiments showing reasonable agreement. The atom structures of the ternary chalcogenide glasses were analyzed in detailed and it was found that gallium atoms are four-fold coordinated by selenium and form [GaSe4] tetrahedra...
February 14, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
W Cui, Q Ren, Y S Zhi, X L Zhao, Z P Wu, P G Li, W H Tang
Monoclinic gallium oxide thin films were deposited on c-plane sapphire substrates at various substrate temperatures ranging from 450 °C to 700 °C by radio frequency magnetron sputtering technology. X-ray diffraction results showed that the deposited β-Ga2O3 films were oriented at (<mml:math display="block"> <mml:mover accent="true"> <mml:mn>2</mml:mn> <mml:mo>¯</mml:mo> </mml:mover></mml:math>01) direction. As the substrate temperature increased, the intensity of β-Ga2O3 peaks increased and bandgap decreased accordingly...
May 1, 2018: Journal of Nanoscience and Nanotechnology
Jingjing Yu, Kashif Javaid, Lingyan Liang, Weihua Wu, Yu Liang, Anran Song, Hongliang Zhang, Wen Shi, Ting-Chang Chang, Hongtao Cao
A visible-blind ultraviolet (UV) photodetector was designed based on three-terminal electronic device of thin-film transistor (TFT) coupled with two-terminal p-n junction optoelectronic device, in hope of combining the beauties of the both devices together. Upon the uncovered back channel surface of amorphous indium-gallium-zinc-oxide (IGZO) TFT, we fabricated PEDOT:PSS/SnOx/IGZO heterojunction structure, through which the formation of p-n junction and directional carrier transfer of photo-generated carriers were experimentally validated...
February 14, 2018: ACS Applied Materials & Interfaces
Nat P Lenzo, Danielle Meyrick, J Harvey Turner
Over 90% of prostate cancers over-express prostate specific membrane antigen (PSMA) and these tumor cells may be accurately targeted for diagnosis by 68 Ga-PSMA-positron emission tomography/computed tomography ( 68 Ga-PSMA-PET/CT) imaging. This novel molecular imaging modality appears clinically to have superseded CT, and appears superior to MR imaging, for the detection of metastatic disease. 68 Ga-PSMA PET/CT has the ability to reliably stage prostate cancer at presentation and can help inform an optimal treatment approach...
February 11, 2018: Diagnostics
Mallory Salvé, Hermane T Avohou, Jean-Christophe M Monbaliu, Pierre Lebrun, Christian Lemaire, Christian Damblon, Pascal de Tullio, Philippe Hubert, Roland Hustinx, André Luxen
This work reports on the development of amide bond bioconjugation for the production of -NOTA and -NODAGA PRGD2 using batch strategy and microfluidic reactor technology. The final radiolabelling step was fully optimized using Design of Experiments (DoE) and Design Space (DS) approaches, hence targeting robust labelling yields in routine. Optimal labelling conditions were defined in sodium acetate buffer as 168 μg/mL peptide concentration, 4.9 pH, 47.5 °C temperature and 12.5 min reaction time. Upon optimization, the Gallium-68 radiolabelling was fully automated...
February 12, 2018: Journal of Labelled Compounds & Radiopharmaceuticals
Koramadai Karuppusamy Kamaleshwaran, Barani Kumar Pollachi Balasundararaj, Raghi Jose, Ajit Sugunan Shinto
Gallium-68 prostate-specific membrane antigen positron emission tomography/computed tomography (Ga-68 PSMA PET/CT) is a promising diagnostic tool for patients with prostate cancer. Penile metastasis from prostate cancer is a rare phenomenon that infrequently manifests as malignant priapism. We present a case of 79-year-old patient diagnosed as a case of adenocarcinoma prostate presenting with penile metastases imaged using Ga-68 PSMA PET/CT.
January 2018: Indian Journal of Nuclear Medicine: IJNM: the Official Journal of the Society of Nuclear Medicine, India
Barbara Lavina, Eunja Kim, Hyunchae Cynn, Philippe F Weck, Kelly Seaborg, Emily Siska, Yue Meng, William Evans
Using combined experimental and computational approaches, we show that at 43 GPa and 1300 K gallium phosphide adopts the super-Cmcm structure, here indicated with its Pearson notation oS24. First-principles enthalpy calculations demonstrate that this structure is more thermodynamically stable above ∼20 GPa than previously proposed polymorphs. In contrast to other polymorphs, the oS24 phase shows a strong bonding differentiation and distorted fivefold coordination geometries of both P atoms. The shortest bond of the phase is a single covalent P-P bond measuring 2...
February 9, 2018: Inorganic Chemistry
Emrah Yücelen, Ivan Lazić, Eric G T Bosch
Using state of the art scanning transmission electron microscopy (STEM) it is nowadays possible to directly image single atomic columns at sub-Å resolution. In standard (high angle) annular dark field STEM ((HA)ADF-STEM), however, light elements are usually invisible when imaged together with heavier elements in one image. Here we demonstrate the capability of the recently introduced Integrated Differential Phase Contrast STEM (iDPC-STEM) technique to image both light and heavy atoms in a thin sample at sub-Å resolution...
February 8, 2018: Scientific Reports
Wadih Nassif, Mohamad Rifai
AIM: The aim of this study was to characterize the surface of zirconia subjected to different treatments and evaluate its effect on cell adhesion and proliferation. MATERIALS AND METHODS: A total of 80 zirconia disks were divided into four groups (n = 20) according to the surface treatments used: group I: as-sintered (AS), no surface treatment applied; group II: abrasion treatment applied using Rocatec (ROC; 3M ESPE) system with silica-coated alumina powder of grit size 110 μm; group III: erbium, chromium:yttrium, scandium, gallium, garnet (Er, Cr:YSGG) laser (LAS; BIOLASE) was used at a frequency of 20 Hz and output power of 3 W; and group IV: specimens were subjected to the selective infiltration etching (SIE) technique...
February 1, 2018: Journal of Contemporary Dental Practice
Seoung-Ryoung Choi, Bradley E Britigan, Barbara Switzer, Traci Hoke, David Moran, Prabagaran Narayanasamy
The nontuberculous mycobacterial (NTM) pathogens, M. avium complex (MAC) and M. abscessus, can result in severe pulmonary infections. Current antibiotics confront significant challenges for treatment of these NTM infections due to emerging multidrug-resistance. Thus, development of new antibiotics targeted against these agents is needed. We examined the inhibitory activities of Ga(NO3)3, GaCl3, gallium meso-tetraphenylporphyrin (GaTP) and several derivative nanoparticles (GaNP) against intra- and extracellular M...
February 8, 2018: Molecular Pharmaceutics
Maged F Bekheet, Lukas Schlicker, Andrew Doran, Konrad Siemensmeyer, Aleksander Gurlo
Stoichiometric (MnGa2O4 and MnAl2O4) and Mn-rich (Mn1.3Ga1.7O4 and Mn1.4Al1.6O4) spinels with a small inversion degree (0.14-0.21) were obtained via a co-precipitation route followed by calcination of the as-synthesized coprecipitates at 700-1000 °C under different gas atmospheres (air, N2 or argon). In situ synchrotron XRD at elevated temperatures reveals the conditions for synthesizing phase-pure materials. The stoichiometry of the samples is confirmed by inductively coupled plasma optical emission spectrometry as well as by structure refinement of neutron diffraction data of phase-pure specimens...
February 7, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Tong Chen, Chengkun Guo, Liang Xu, Quan Li, Kaiwu Luo, Desheng Liu, Lingling Wang, Mengqiu Long
Using the non-equilibrium Green's function formalism in combination with density functional theory, we calculated the spin-dependent electronic properties of molecular devices consisting of pristine and hydrogen-terminated zigzag gallium nitride nanoribbons (ZGaNNRs). Computational results show that the proposed ZGaNNR models display multiple functions with perfect spin filtering, rectification, and a spin negative differential resistance (sNDR) effect. Spin-dependent transport properties, spin density and transmission pathways with applied bias values were calculated to understand the spin filter and the sNDR effect...
February 7, 2018: Physical Chemistry Chemical Physics: PCCP
Neil Burford, Riccardo Suter, Paul Gray, Robert McDonald
The synthesis and characterization of salts with the generic formula [P(Im)3M][OTf]x (Im = imidazole; M = phosphorus, arsenic or antimony and x = 3; M = tin or germanium and x = 2) are reported. In all cases, the cations adopt a cage structure with two chemically and energetically distinct apical lone pairs. In contrast, complexes of gallium and indium engage two P(Im)3 ligands resulting in a distorted octahedral geometry for the triel centre in compounds of the generic formula [{P(Im)3}2M][OTf]3. An assessment of the acidity and basicity of the new compounds is presented...
February 5, 2018: Chemistry: a European Journal
Byung Ha Kang, Won-Gi Kim, Jusung Chung, Jin Hyeok Lee, Hyun Jae Kim
A homojunction-structured amorphous indium gallium zinc oxide (a-IGZO) phototransistor that can detect visible light is reported. The key element of this technology is an absorption layer composed of hydrogen-doped a-IGZO. This absorption layer is fabricated by simple hydrogen plasma doping (HPD), and sub-gap states are induced by increasing the amount of hydrogen impurities. Those sub-gap states, which lead to a higher number of photo-excited carriers and aggravate the instability under negative bias illumination stress, enabled the detection of a wide range of visible light (400-700 nm)...
February 6, 2018: ACS Applied Materials & Interfaces
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