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Thomas E Rams, Abdulaziz Y Alwaqyan
OBJECTIVE: This study assessed the reproducibility of a red diode laser device, and its capability to detect dental calculus in vitro on human tooth root surfaces. MATERIAL AND METHODS: On each of 50 extracted teeth, a calculus-positive and calculus-free root surface was evaluated by two independent examiners with a low-power indium gallium arsenide phosphide diode laser (DIAGNOdent) fitted with a periodontal probe-like sapphire tip and emitting visible red light at 655 nm wavelength...
October 2017: Saudi Dental Journal
Shota Shimano, Miki Tsuda, Seiya Fuyuno, Yoshihide Arimura, Fumio Nanishi
A 60-year-old Japanese man with autosomal dominant polycystic kidney disease (ADPKD) on maintenance hemodialysis underwent colonoscopy and endoscopic mucosal resection (EMR). He was hospitalized after 4 days of fever that began the day following colonoscopy. We detected Klebsiella pneumoniae in a blood culture and a ring-shaped integration in the liver cyst by gallium scintigraphy. He recovered with antibiotics and percutaneous drainage. The patient was believed to have contracted the liver cyst infection via an injured colonic mucosa and portal vein...
October 16, 2017: Internal Medicine
Katri Avarmaa, Simon Yliaho, Pekka Taskinen
The recycling and recovery of valuable metals from waste materials is one of the key issues in maintaining the sustainability of base and rare metals. Especially WEEE (Waste Electric and Electronic Equipment) can be considered as a high potential resource for a number of valuable and critical metals like gallium, germanium and indium. During the mechanical processing of WEEE, these metals are primary separated into the non-ferrous scrap fractions, including copper fraction. As a consequence, the behavior of these valuable metals and the possibility of their recycling in secondary copper smelting are of great interest...
October 11, 2017: Waste Management
Tobias Maurer, Jürgen E Gschwend, Matthias Eiber
PURPOSE OF REVIEW: With Gallium (Ga)-prostate-specific membrane antigen (PSMA) PET/computed tomography (CT) as emerging imaging technique offering superior detection rates in biochemical recurrent prostate cancer, salvage lymph node dissection has gained increasing interest in localized oligometastatic prostate cancer. Currently, PSMA-targeting small molecules cannot only be linked to positron-emitting isotopes for imaging but also be labelled with γ-radiation emitting isotopes. These modified PSMA agents are evaluated for intraoperative guidance for resection of metastatic lymph nodes...
October 11, 2017: Current Opinion in Urology
Matija Varga, Andreas Mehmann, Josip Marjanovic, Jonas Reber, Christian Vogt, Klaas Paul Pruessmann, Gerhard Tröster
Stretchable conductors based on eutectic gallium-indium (eGaIn) alloy are patterned on a polychloroprene substrate (neoprene foam) using stencil printing. By tuning the amount of eGaIn on the neoprene substrate, different strain-sensitivity of electrical resistance is achieved. Conductors with a layer of eGaIn, which adsorbs to the walls of 60-100 µm wide neoprene cells, change their electrical resistance for 5% at 100% strain. When the amount of eGaIn is increased, the cells are filled with eGaIn and the strain-sensitivity of the electrical resistance rises to 300% at 100% strain...
October 13, 2017: Advanced Materials
Simon Aldridge, Alexa Caise, Joseph Abdalla, Remi Tirfoin, Alison Edwards
Reactions of the β-diketiminate stabilized gallium dihydride (Nacnac)DippGaH2 with chelating Ir(I) bis(phosphine) precursors under an H2 atmosphere are shown to provide a simple route to Ir(V) complexes stabilized by strongly σ-donating hydrides and the carbene-like (Nacnac)DippGa donor. Characterization of these systems as seven-coordinate Ir(V) tetrahydride species is supported by single crystal X-ray and neutron diffraction, and by T1 NMR measurements. By contrast, related systems featuring more sterically demanding (non-chelating) ancillary ligands are better described in terms of a bis(hydride) dihydrogen [L3Ir(H)2(H2)]+ formulation and a formal Ir(III) oxidation state...
October 10, 2017: Chemistry: a European Journal
Vladimir G Sokolov, Tatyana S Koptseva, Mikhail V Moskalev, Natalia L Bazyakina, Alexander V Piskunov, Anton V Cherkasov, Igor L Fedushkin
The reaction of Cl2GaH with a sodium salt of the dpp-Bian radical-anion (dpp-Bian(•-))Na (dpp-Bian = 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene) affords paramagnetic gallane (dpp-Bian(•-))Ga(Cl)H (1). Oxidation of (dpp-Bian(2-))Ga-Ga(dpp-Bian(2-)) (2) with N2O results in the dimeric oxide (dpp-Bian(•-))Ga(μ(2)-O)2Ga(dpp-Bian(•-)) (3). A treatment of the oxide 3 with phenylsilane affords paramagnetic gallium hydrides (dpp-Bian(•-))GaH2 (4) and (dpp-Bian(•-))Ga{OSi(Ph)H2}H (5) depending on the reagent's stoichiometry...
October 12, 2017: Inorganic Chemistry
Syed Ali Musstjab Akber Shah Eqani, Zafar Iqbal Tanveer, Chi Qiaoqiao, Alessandra Cincinelli, Zafeer Saqib, Sikandar I Mulla, Nadeem Ali, Ioannis A Katsoyiannis, Mustafa Nawaz Shafqat, Heqing Shen
The current study determined, for the first time, the levels of titanium (Ti), strontium (Sr), barium (Ba), vanadium (V), gallium (Ga), tin (Sn), thallium (Tl), and antinomy (Sb), in deposited dust, and human hair collected from general population of different geographical areas of Pakistan. All the samples were prepared by microwave digestion and measured by ICP-MS. The results showed that on deposited dust samples, the detected elements followed the descending trend as: Ti > Sr > Ba > V > Ga > Sn > Tl > Sb similar to the upper continental crust...
October 11, 2017: Environmental Science and Pollution Research International
Kasper Grandahl, Ole Steen Mortensen, David Zim Sherman, Brian Køster, Paul-Anker Lund, Kristina Sophie Ibler, Paul Eriksen
BACKGROUND: Exposure to solar ultraviolet radiation is a well-known cause of skin cancer. This is problematic for outdoor workers. In Denmark alone, occupational skin cancer poses a significant health and safety risk for around 400,000 outdoor workers. Objective measures of solar ultraviolet radiation exposure are needed to help resolve this problem. This can be done using personal ultraviolet radiation dosimeters. METHODS: We consider technical and practical feasibility of measuring individual solar ultraviolet exposure at work and leisure in professions with different á priori temporal high-level outdoor worktime, using aluminium gallium nitride (AlGaN) photodiode detector based personal UV-B dosimeters...
October 10, 2017: Biomedical Engineering Online
Ali Mardassi, Senda Turki, Rim Lahiani, Hajer Mbarek, Sonia Benzarti, Hédi Gharsallah
INTRODUCTION: Necrotizing otitis externa remains a severe and sometimes life-threatening disease in diabetic patient. Many therapeutic approaches have been described but what about the real benefit of hyperbaric oxygenotherapy in the management of this disease? METHODS: The authors reported a retrospective study about 42 patients treated for necrotizing external otitis over a period of 9 years (2006 to 2014). The patients were treated either by only antibiotherapy (23 cases) or with both antibiotherapy and hyperbaric oxygenotherapy (19 cases)...
December 2016: La Tunisie Médicale
Masatoshi Sakurai, Takaaki Toyama, Taku Kikuchi, Jun Kato, Takayuki Shimizu, Yuya Koda, Daiki Karigane, Yusuke Yamane, Ryohei Abe, Rie Yamazaki, Tomonori Nakazato, Tadaki Nakahara, Masahiro Jinzaki, Shinichiro Okamoto, Takehiko Mori
Fluorine-18 fluorodeoxyglucose (FDG) positron emission tomography (PET) has been recommended as a complementary tool for the staging of various malignancies, including malignant lymphoma. PET findings often shift patients to higher stages and may affect treatment outcomes. In this study, we retrospectively compared staging and treatment outcomes of newly diagnosed diffuse large B-cell lymphoma (DLBCL) assessed by PET (n = 153) or gallium-67 scintigraphy (Ga) (n = 95). In total, Ga upstaged two (2.1%) of 95 patients, whereas PET upstaged 13 (8...
October 9, 2017: International Journal of Hematology
Robert Marcus, Andrew Davies, Kiyoshi Ando, Wolfram Klapper, Stephen Opat, Carolyn Owen, Elizabeth Phillips, Randeep Sangha, Rudolf Schlag, John F Seymour, William Townsend, Marek Trněný, Michael Wenger, Günter Fingerle-Rowson, Kaspar Rufibach, Tom Moore, Michael Herold, Wolfgang Hiddemann
BACKGROUND: Rituximab-based immunochemotherapy has improved outcomes in patients with follicular lymphoma. Obinutuzumab is a glycoengineered type II anti-CD20 monoclonal antibody. We compared rituximab-based chemotherapy with obinutuzumab-based chemotherapy in patients with previously untreated advanced-stage follicular lymphoma. METHODS: We randomly assigned patients to undergo induction treatment with obinutuzumab-based chemotherapy or rituximab-based chemotherapy...
October 5, 2017: New England Journal of Medicine
A M Beiler, D Khusnutdinova, B L Wadsworth, G F Moore
Hybrid materials that link light capture and conversion technologies with the ability to drive reductive chemical transformations are attractive as components in photoelectrosynthetic cells. We show that thin-film polypyridine surface coatings provide a molecular interface to assemble cobalt porphyrin catalysts for hydrogen evolution onto a visible-light-absorbing p-type gallium phosphide semiconductor. Spectroscopic techniques, including grazing angle attenuated total reflection Fourier transform infrared spectroscopy, confirm that the cobalt centers of the porphyrin macrocycles coordinate to pyridyl nitrogen sites of the organic surface coating...
October 3, 2017: Inorganic Chemistry
Christopher J Palestro, Charito Love
Infection is an infrequent complication of lower extremity prosthetic joint surgery. Approximately one-third develop within 3 months (early), another third within 1 year (delayed), and the remainder more than 1 year (late) after surgery. Diagnosing prosthetic joint infection, especially in the early postoperative period during the first year, is challenging. Pain is almost always present. The presence of fever is variable, ranging from less than 5% to more than 40% of patients. Leukocytosis is a poor predictor of infection...
November 2017: Seminars in Nuclear Medicine
Hong Jae Kim, Young Jun Tak, Sung Pyo Park, Jae Won Na, Yeong-Gyu Kim, Seonghwan Hong, Pyeong Hun Kim, Geon Tae Kim, Byeong Koo Kim, Hyun Jae Kim
In this study, we propose a self-activated radical doping (SRD) method on the catalyzed surface of amorphous oxide film that can improve both the electrical characteristics and the stability of amorphous oxide films through oxidizing oxygen vacancy using hydroxyl radical which is a strong oxidizer. This SRD method, which uses UV irradiation and thermal hydrogen peroxide solution treatment, effectively decreased the amount of oxygen vacancies and facilitated self-passivation and doping effect by radical reaction with photo-activated oxygen defects...
September 29, 2017: Scientific Reports
A Ballardini, M Montesi, S Panseri, A Vandini, P G Balboni, A Tampieri, S Sprio
The present work describes the synthesis and characterization of new apatite phases co-doped with gallium, magnesium and carbonate, exhibiting osteogenic and antibacterial ability. The apatites are synthesized at low temperature to retain nanocrystallinity and controlled doping with the various bioactive foreign ions, as assessed by physico-chemical and crystallographic analyses, reporting the achievement of single phases with reduced crystal ordering. The analysis of single and multi-doped apatites reports to different mechanisms acting in the incorporation of gallium and magnesium ions in the apatite structure...
September 29, 2017: Journal of Biomedical Materials Research. Part A
Claude Piguet, Davood Zare, Yan Suffren, Homayoun Nozary, Andreas Hauser
The kinetic lability of hexadentate gallium-based tripods is sufficient to ensure thermodynamic self-assembly of luminescent heterodimetallic [GaLn(L3)3]6+ helicates on the hour time scale, where Ln is a trivalent 4f-block cation. The inertness is however large enough for preserving the triple-helical structure when [GaLn(L3)3]6+ is exposed to lanthanide exchange. The connection of a second gallium-based tripod further slows down the exchange processes to such an extent that spectroscopically active [CrErCr(L4)3]9+ can be diluted into closed-shell [GaYGa(L4)3]9+ matrices without metal scrambling...
September 28, 2017: Angewandte Chemie
Jun-Ichi Fujita, Takaki Hiyama, Ayaka Hirukawa, Takahiro Kondo, Junji Nakamura, Shin-Ichi Ito, Ryosuke Araki, Yoshikazu Ito, Masaki Takeguchi, Woei Wu Pai
Direct growth of graphene integrated into electronic devices is highly desirable but difficult due to the nominal ~1000 °C chemical vapor deposition (CVD) temperature, which can seriously deteriorate the substrates. Here we report a great reduction of graphene CVD temperature, down to 50 °C on sapphire and 100 °C on polycarbonate, by using dilute methane as the source and molten gallium (Ga) as catalysts. The very low temperature graphene synthesis is made possible by carbon attachment to the island edges of pre-existing graphene nuclei islands, and causes no damages to the substrates...
September 28, 2017: Scientific Reports
Shruti Tulsyan, Chandan J Das, Madhavi Tripathi, Amlesh Seth, Rajeev Kumar, Chandrasekhar Bal
INTRODUCTION: We carried out this study to compare Glu-NH-CO-NH-Lys-(Ahx) [Ga(HBED-CC)] [Ga prostate-specific membrane antigen-11 (PSMA-11)] PET with multiparametric MRI (mpMRI) for the staging of high-risk prostate cancer. PATIENTS AND METHODS: This was a prospective study in which 36 patients with high-risk prostate cancer were included. The criteria for inclusion were biopsy-proven prostate cancer with a serum prostate specific antigen of at least 20 and/or Gleason's score of at least 8...
September 27, 2017: Nuclear Medicine Communications
Roberto Lorenzi, Alberto Paleari, Vladimir N Sigaev, Elena S Ignat'eva, Nikita V Golubev
In this Letter, we present detailed absorption and emission data on nanostructured germanosilicate glasses and glass ceramics containing Ga2O3 nanophases and doped with Gd ions. The results show that these systems are suitable hosts for the enhancement of the excitation cross section of rare earth ions via energy transfer from the gallium oxide nanophase with a related quantum yield of 21%. The role of matrix composition and nanostructure morphology on the Gd emission is discussed.
July 1, 2017: Optics Letters
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