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Bart Van den Bogaert, Lore Gheeraert, Mumin Enis Leblebici, Koen Binnemans, Tom Van Gerven
The photochemical recovery of europium from non-aqueous media, more specifically alcohols, is studied. The recovery was performed by photochemical reduction of europium(iii) to europium(ii) and subsequent removal as the insoluble EuCl2. Two charge transfer bands are present in the UV-C region, one originating from the alcohol (around 230 nm) and the other from the chloride anion (at 271 nm), which are responsible for the photochemical reduction when the solution is illuminated by a medium-pressure mercury lamp...
October 20, 2016: Physical Chemistry Chemical Physics: PCCP
Aaron J Celestian, Caleb J Chappell, Melinda J Rucks, Pauline Norris
The ion exchange of yttrium, one of the five most critical rare-earth elements as outlined by the U.S. Department of Energy, into ETS-4 is a dynamic, multistep ion exchange process. The ion exchange process was followed using in situ time-resolved Raman spectroscopy, and the crystal structures of the pre-exchange and post-exchange forms were determined by single-crystal X-ray diffraction. In situ Raman spectroscopy is an ideal tool for this type of study, as it measures the spectral changes that are a result of molecular geometry changes at fast time intervals, even where symmetry and unit volume changes are minimally detected by X-ray diffraction...
October 19, 2016: Inorganic Chemistry
Amita Rani, Sujata Mohanty, Pankaj Sharma, Jitender Dabas
INTRODUCTION: Alveolar osteitis (AO) is a well-known complication following tooth extraction. Plethora of literature is available regarding its treatment modalities signifying that none of the treatment is as effective as any another treatment. LASER on the other hand, has been used to promote soft tissue healing. MATERIAL AND METHOD: In order to evaluate the effects of laser on healing of AO we undertook a randomized clinical trial. In the trial, sixty patients diagnosed with AO were randomly divided into three groups viz: alvogyl, diode laser and Er:Cr:YSGG laser (erbium chromium yttrium scandium gallium garnet)...
September 2016: Journal of Maxillofacial and Oral Surgery
Zhongzhi Jia, Guomin Jiang, Feng Tian, Chunfu Zhu, Xihu Qin
BACKGROUND/AIM: Over the past two decades, several advances have been made in the management of patients with hepatocellular carcinoma (HCC) and portal vein tumor thrombosis (PVTT). Yttrium-90 ( 90 Y) radioembolization has recently been made a treatment option for patients with HCC and PVTT. However, there is still a need to systematicly evaluate the outcomes of 90 Y radioembolization for HCC and PVTT. We aimed to assess the safety and effectiveness of 90 Y radioembolization for HCC and PVTT...
September 2016: Saudi Journal of Gastroenterology: Official Journal of the Saudi Gastroenterology Association
Suresh Subramanian, Usha Pandey, Pradip Chaudhari, Monica Tyagi, Sanjay Gupta, Geetanjali Singh, Ashutosh Dash, Grace Samuel, Meera Venkatesh
BACKGROUND & OBJECTIVES: Yttrium-90 ( 90 Y)-based radioembolization has been employed to treat hepatocellular carcinoma (HCC) as commercial radioactive glass and polymeric resin microspheres. However, in India and other Asian countries, these preparations must be imported and are expensive, validating the need for development of indigenous alternatives. This work was aimed to develop an economically and logistically favourable indigenous alternative to imported radioembolizing agents for HCC therapy...
May 2016: Indian Journal of Medical Research
So Eun Park, Sang Seok Kim, Chul Woo Kim, Young Her
No abstract text is available yet for this article.
October 2016: Annals of Dermatology
Hyun-Min Seo, Jung-In Kim, Han-Saem Kim, Young-Jun Choi, Won-Serk Kim
BACKGROUND: Rosacea treatments including oral/topical medications and laser therapy are numerous but unsatisfactory. OBJECTIVE: To compare the effectiveness of the dual wavelength long-pulsed 755-nm alexandrite/1,064-nm neodymium: yttrium-aluminum-garnet laser (LPAN) with that of 585-nm pulsed dye laser (PDL) for rosacea. METHODS: This was a randomized, single-blinded, comparative study. Full face received four consecutive monthly treatments with LPAN or PDL, followed-up for 6 months after the last treatment...
October 2016: Annals of Dermatology
Suresh de Silva, Simon Mackie, Peter Aslan, David Cade, Warick Delprado
BACKGROUND: Intra-arterial brachytherapy with yttrium-90 ((90)Y) resin microspheres (radioembolization) is a procedure to selectively deliver high-dose radiation to tumors. The purpose of this research was to compare the radioembolic effect of (90)Y-radioembolization versus the embolic effect of bland microspheres in the porcine kidney model. METHODS: In each of six pigs, ~25-33 % of the kidney volume was embolized with (90)Y resin microspheres and an equivalent number of bland microspheres in the contralateral kidney...
October 14, 2016: Cardiovascular and Interventional Radiology
Sabrina Seidel, Christian Patzig, Wolfgang Wisniewski, Antje Gawronski, Yongfeng Hu, Thomas Höche, Christian Rüssel
The non-isochemical crystallization of glasses leads to glass-ceramics in which the chemical composition of the amorphous matrix differs from that of the parent glass. It is challenging to solely analyse the properties of these residual glassy phases because they frequently contain finely dispersed crystals. In this study, the composition of the residual glass matrix after the crystallization of a glass with the mol% composition 50.6 SiO2 · 20.7 MgO · 20.7 Al2O3 · 5.6 ZrO2 · 2.4 Y2O3 is analysed by scanning transmission electron microscopy (STEM) including energy dispersive X-ray analysis (EDXS)...
October 13, 2016: Scientific Reports
Meng Ju, Cheng Lu, Yau-Yuen Yeung, Xiaoyu Kuang, Jingjing Wang, Yongsheng Zhu
The recent renaissance of the use of rare-earth doped yttrium orthoaluminate as an ideal laser material has generated significant interest; however, the unique structural features underlying many of its outstanding optical properties still require elucidation. To solve this intriguing problem, we performed a systematic first-principles study; the results of the study reveal a new stable phase for Tm(3+) doped YAlO3 (YAP), of monoclinic Pm symmetry, with an 80-atom per unit cell. An unbiased CALYPSO structure search indicates that the Tm(3+) impurity ion tends to substitute the position of Y(3+) in the YAP crystal lattice...
October 13, 2016: ACS Applied Materials & Interfaces
Krisztina Somogyári, Péter Móricz, Imre Gerlinger, László Kereskai, István Szanyi, Ildikó Takács
The aim of this study was to evaluate the short and medium-term effects of radiofrequency (RF) and potassium titanyl phosphate (KTP) and neodymium-yttrium-aluminum garnet (Nd:YAG) laser treatment on the inferior turbinate mucosa in a porcine model. Following randomization, the inferior turbinates were treated either with RF submucosally or with the KTP or the Nd:YAG laser on the surface under videoendoscopic control. Tissue samples were taken at the end of postoperative weeks 1 and 6, and were evaluated macroscopically and histopathologically...
October 11, 2016: Surgical Innovation
Stephan Walrand, Michel Hesse, François Jamar
After a brief history of the major evolutions of PET since its introduction in 1972, this paper reviews the recent improvements and novel trends in PET with a special focus on time of flight that is currently the major research topic. Novel emerging acquisition modalities, such as dual tracer acquisition, inline hadron therapy dose imaging and yttrium-90 imaging are reviewed.
October 12, 2016: British Journal of Radiology
Yixun Xing, Ashish K Jindal, Martín Regueiro-Figueroa, Mariane Le Fur, Nelly Kervarec, Piyu Zhao, Zoltan Kovacs, Laura Valencia, Paulo Pérez-Lourido, Raphaël Tripier, David Esteban-Gómez, Carlos Platas-Iglesias, A Dean Sherry
Recently developed dynamic nuclear polarization (DNP) technology offers the potential of increasing the NMR sensitivity of even rare nuclei for biological imaging applications. Hyperpolarized (89) Y is an ideal candidate because of its narrow NMR linewidth, favorable spin quantum number (I=1/2 ), and long longitudinal relaxation times (T1 ). Strong NMR signals were detected in hyperpolarized (89) Y samples of a variety of yttrium complexes. A dataset of (89) Y NMR data composed of 23 complexes with polyaminocarboxylate ligands was obtained using hyperpolarized (89) Y measurements or (1) H,(89) Y-HMQC spectroscopy...
October 10, 2016: Chemistry: a European Journal
Guilong Cai, Zhibing Zhou, Wenchao Wu, Bo Yao, Shaowen Zhang, Xiaofang Li
Pd-Catalyzed C(sp(3))-C(sp(2)) cross-coupling of Y(CH2SiMe3)3(THF)2 with vinyl bromides and triflates has been developed for efficient synthesis of various allyltrimethylsilanes. The cross-coupling reaction was conducted at room temperature with low catalyst loading of either Pd(PPh3)4 or Pd(PPh3)2Cl2, and exhibited high efficiency and a broad substrate scope. In combination with the cross-coupling by the Lewis-acid catalyzed Hosomi-Sakurai reaction, a novel three-component one-pot cascade reaction was then accomplished to deliver homoallylic alcohols and ethers with high regioselectivity and diastereoselectivity...
September 21, 2016: Organic & Biomolecular Chemistry
Rana Al-Falaki, Francis Hughes, Reena Wadia, Christie Eastman, Elias Kontogiorgos, Samuel Low
Aims: This is an extended case series of patients treated with an Erbium, Chromium: Yttrium Scandium Gallium Garnet (Er,Cr:YSGG) laser as an adjunct to scaling for the management of intrabony defects. Materials & methods: 46 patients with 79 angular intrabony defects associated with pocket depths of >5mm, and a mean age of 53 ± 9 years presenting with chronic periodontitis were included in the analysis. All patients underwent a localized minimally invasive closed flap surgery utilizing Er,Cr:YSGG laser therapy...
June 29, 2016: Laser Therapy
Clara Ferreira, Daniel Johnson, Karl Rasmussen, Clinton Leinweber, Salahuddin Ahmad, Jae Won Jung
PURPOSE: To develop a novel conformal superficial brachytherapy (CSBT) device as a treatment option for the patient-specific radiation therapy of conditions including superficial lesions, postsurgical positive margins, Dupuytren's contractures, keloid scars, and complex anatomic sites (eyelids, nose, ears, etc.). METHODS AND MATERIALS: A preliminary CSBT device prototype was designed, built, and tested using readily available radioactive seeds. Iodine-125 ((125)I) seeds were independently guided to the treatment surface to conform to the target...
October 3, 2016: Brachytherapy
Rui Ye, Chao Xu, Xingjun Wang, Jishi Cui, Zhiping Zhou
Near-infrared up-conversion lasing in erbium(Er)-yttrium(Y) chloride silicate nanowires was demonstrated when pumped by 1476 nm laser at room temperature. The emission covers a very wide wavelength range (400-1000 nm). A clear threshold for 985 nm peak was observed at a launched average pump power of approximately 7 mW. Above threshold, the intensity increases linearly when turning up the pump power. The full width at half maximum at 985 nm decreases from 1.25 nm to 0.25 nm when reducing the measurement temperature from 30 K to 7 K, which is the narrowest linewidth of 980 nm micro-lasers to date...
October 5, 2016: Scientific Reports
Tolga Yilmaz, Ahu Yilmaz
PURPOSE: To evaluate changes in central macula thickness (CMT), subfoveal choroid thickness (SCT), and intraocular pressure (IOP) before and after neodymium:yttrium-aluminum-garnet (Nd:YAG) laser capsulotomy. METHODS: 42 eyes of 42 patients who underwent Nd:YAG laser capsulotomy were included in this prospective study. CMT, SCT, and IOP were evaluated preoperatively and at postoperative week 1 and postoperative months 1, 3, 6, and 12. RESULTS: CMT was 238...
October 3, 2016: International Ophthalmology
Jerzy Krupka, Bartlomiej Salski, Pawel Kopyt, Wojciech Gwarek
Numerical solutions of coupled Maxwell and Landau-Lifshitz-Gilbert equations for a magnetized yttrium iron garnet (YIG) sphere acting as a one-stage filter are presented. The filter is analysed using finite-difference time-domain technique. Contrary to the state of the art, the study shows that the maximum electromagnetic power transmission through the YIG filter occurs at the frequency of the magnetic plasmon resonance with the effective permeability of the gyromagnetic medium μr ≈ -2, and not at a ferromagnetic resonance frequency...
October 4, 2016: Scientific Reports
Daniel Ryan Clark, Huayang Zhu, David R Diercks, Sandrine Ricote, Robert J Kee, Ali Almansoori, Brian P Gorman, Ryan P O'Hayre
A laser-assisted atom-probe-tomographic (LAAPT) method has been developed and applied to measure and characterize the three-dimensional atomic and electronic nanostructure at an yttrium-doped barium zirconate (BaZr0.9Y0.1O3-δ, BZY10) grain boundary. Proton-conducting perovskites, such as BZY10, are attracting intense interest for a variety of energy conversion applications. However, their implementation has been hindered, in part, because of high grain-boundary (GB) resistance that is attributed to a positive GB space-charge layer (SCL)...
October 3, 2016: Nano Letters
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