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Yttrium

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https://www.readbyqxmd.com/read/28812136/clinical-outcomes-of-y90-radioembolization-for-recurrent-hepatocellular-carcinoma-following-curative-resection
#1
Rehan Ali, Ahsun Riaz, Ahmed Gabr, Nadine Abouchaleh, Ronald Mora, Ali Al Asadi, Juan Carlos Caicedo, Michael Abecassis, Nitin Katariya, Haripriya Maddur, Laura Kulik, Robert J Lewandowski, Riad Salem
PURPOSE: To assess safety/efficacy of yttrium-90 radioembolization (Y90) in patients with recurrent hepatocellular carcinoma (HCC) following curative surgical resection. METHODS: With IRB approval, we searched our prospectively acquired database for patients that were treated with Y90 for recurrent disease following resection. Baseline characteristics and bilirubin toxicities following Y90 were evaluated. Intention-to-treat overall survival (OS) and time-to-progression (TTP) from Y90 were assessed...
August 15, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28812042/visual-outcomes-24%C3%A2-months-after-laserace
#2
AnnMarie Hipsley, David Hui-Kang Ma, Chi-Chin Sun, Mitchell A Jackson, Daniel Goldberg, Brad Hall
BACKGROUND: To evaluate the effects on near and intermediate visual performance after bilateral Laser Anterior Ciliary Excision (LaserACE) procedure. METHODS: LaserACE surgery was performed using the VisioLite 2.94 μm erbium: yttrium-aluminum-garnet (Er:YAG) ophthalmic laser system in 4 oblique quadrants on the sclera over the ciliary muscle in 3 critical zones of physiological importance (over the ciliary muscles and posterior zonules) with the aim to improve natural dynamic accommodative forces...
2017: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/28810124/ferroelectric-phase-transition-induced-a-large-fmr-tuning-in-self-assembled-batio3-y3fe5o12-multiferroic-composites
#3
Guohua Dong, Ziyao Zhou, Xu Xue, Yijun Zhang, Bin Peng, Mengmeng Guan, Shishun Zhao, Zhongqiang Hu, Wei Ren, Zuo-Guang Ye, Ming Liu
Yttrium iron garnet (YIG) is of great importance in RF/microwave devices for its low loss, low intrinsic damping and high permeability. Nevertheless, tuning of YIG based multiferroics is still a challenge due to its near zero magnetostriction and the difficulty of building epitaxial interface between ferromagnetic garnet and ferroelectric perovskite phases. In this work, the vertical aligned heterostructure of YIG:BTO/STO(001) with local epitaxial interface between BTO and YIG is well-constructed, where the single crystal BTO pillars are embedded in YIG matrix...
August 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28807799/the-influence-of-yttrium-segregation-dependent-phase-partitioning-and-residual-stresses-on-the-aging-and-fracture-behaviour-of-3y-tzp-ceramics
#4
Dušan Bučevac, Tomaž Kosmač, Andraž Kocjan
The yttrium-segregation-dependent phase partitioning and residual stress development that influence both the aging and the fracture behaviour in 3Y-TZP bioceramics were studied by sintering alumina-free 3Y-TZP, varying the sintering temperature and the time, to yield ceramics with identical grain size distributions, but with different phase compositions. The structure and stability of the resulting tetragonal phases, in the form of transformable, yttria-lean t-ZrO2 (YLZ) and non-transformable, yttria-rich t"-ZrO2 and/or t'-ZrO2 (YRZ), were studied by X-ray diffraction (XRD) and focused ion beam scanning electron microscopy (FIB-SEM)...
August 11, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28806426/comparative-evaluation-of-the-effect-of-laser-etching-on-the-shear-bond-strength-of-crowns-cemented-with-two-different-luting-agents-an-in-vitro-study
#5
Ankur Dahiya, Paresh Gandhi, Nadim Z Baba
PURPOSE: The aim of this study was to compare the shear bond strength of crowns cemented on natural teeth after surface treatment of the enamel with an erbium-doped yttrium aluminum garnet (Er:YAG) laser. MATERIALS AND METHODS: Crown preparation was done for 40 full-metal crowns, and wax patterns with loops were cast in a cobalt-chromium alloy. The Er:YAG laser was used for surface treatment of some teeth, and teeth without surface treatment acted as the control...
August 14, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/28805385/synthesis-of-a-series-of-heavy-lanthanide-iii-monoporphyrinato-complexes-with-tetragonal-symmetry
#6
Anas Santria, Akira Fuyuhiro, Takamitsu Fukuda, Naoto Ishikawa
A series of heavy lanthanide(III) and yttrium(III) monoporphyrinato complexes formulated in [Ln(TPP)(cyclen)]Cl (Ln = Tb, Dy, Ho, Er, Tm, Yb, and Y; TPP = 5,10,15,20-tetraphenylporphyrinato), with cyclen, 1,4,7,10-tetraazacyclododecane, as a capping ligand, have been prepared in mild conditions and studied using single-crystal X-ray diffraction crystallography. The complexes exhibit an electronic absorption band (B(0,0)) in the range of 421-423 nm, showing a bathochromic shift associated with the increase of the ionic radii of the lanthanide, as well as two peaks of Q(1,0) and Q(0,0) bands between 548-586 nm...
August 14, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28801630/the-role-of-snell-s-law-for-a-magnonic-majority-gate
#7
Naoki Kanazawa, Taichi Goto, Koji Sekiguchi, Alexander B Granovsky, Caroline A Ross, Hiroyuki Takagi, Yuichi Nakamura, Hironaga Uchida, Mitsuteru Inoue
In the fifty years since the postulation of Moore's Law, the increasing energy consumption in silicon electronics has motivated research into emerging devices. An attractive research direction is processing information via the phase of spin waves within magnonic-logic circuits, which function without charge transport and the accompanying heat generation. The functional completeness of magnonic logic circuits based on the majority function was recently proved. However, the performance of such logic circuits was rather poor due to the difficulty of controlling spin waves in the input junction of the waveguides...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28796505/toolbox-of-nonmetallocene-lanthanides-multifunctional-catalysts-in-group-transfer-polymerization
#8
Friederike Adams, Martin R Machat, Peter T Altenbuchner, Johannes Ehrmaier, Alexander Pöthig, Tolga N V Karsili, Bernhard Rieger
Herein, we present a fundamental study of isostructural 2-methoxyethylamino-bis(phenolate)-lanthanide complexes [(ONOO)(R)M(X)(THF)] (M = Lu, Y; R = (t)Bu, CMe2Ph, X = CH2TMS, collidine; THF = tetrahydrofuran; TMS = trimethylsilyl) for rare-earth metal-mediated group-transfer polymerization (GTP). This analysis includes the differentiation of electron-donating and nondonating vinyl monomers and two metal centers with regard to the ionic radius (yttrium and lutetium). In addition, highly nucleophilic alkyl initiators are compared with electron-donating heteroaromatic initiators...
August 10, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28791605/laser-and-light-treatments-for-hair-reduction-in-fitzpatrick-skin-types-iv-vi-a-comprehensive-review-of-the-literature
#9
REVIEW
Rachel A Fayne, Marina Perper, Ariel E Eber, Adam S Aldahan, Keyvan Nouri
Unwanted facial and body hair presents as a common finding in many patients, such as females with hirsutism. With advances in laser and light technology, a clinically significant reduction in hair can be achieved in patients with light skin. However, in patients with darker skin, Fitzpatrick skin types (FST) IV-VI, the higher melanin content of the skin interferes with the proposed mechanism of laser-induced selective photothermolysis, which is to target the melanin in the hair follicle to cause permanent destruction of hair bulge stem cells...
August 8, 2017: American Journal of Clinical Dermatology
https://www.readbyqxmd.com/read/28789858/aging-of-3y-tzp-dental-zirconia-and-yttrium-depletion
#10
P Pandoleon, E Kontonasaki, N Kantiranis, N Pliatsikas, P Patsalas, L Papadopoulou, T Zorba, K M Paraskevopoulos, P Koidis
OBJECTIVE: Yttrium-stabilized zirconia is susceptible to low temperature degradation after interaction with water. Various mechanisms by which water molecules destabilize the tetragonal phase have been proposed, while the concept of yttrium depletion by the incorporation of hydroxyl ions in the crystalline structure either through the formation of YOH/ZrOH bonds or small α-Y(OH)3 crystallites, is prevailing. The present study was performed to investigate the surface alterations on a 3Y-TZP dental ceramic during the process of in-vitro aging and to further explore the yttrium depletion mechanism that occurs upon interaction with water...
August 5, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28781171/first-line-selective-internal-radiotherapy-plus-chemotherapy-versus-chemotherapy-alone-in-patients-with-liver-metastases-from-colorectal-cancer-foxfire-sirflox-and-foxfire-global-a-combined-analysis-of-three-multicentre-randomised-phase-3-trials
#11
Harpreet S Wasan, Peter Gibbs, Navesh K Sharma, Julien Taieb, Volker Heinemann, Jens Ricke, Marc Peeters, Michael Findlay, Andrew Weaver, Jamie Mills, Charles Wilson, Richard Adams, Anne Francis, Joanna Moschandreas, Pradeep S Virdee, Peter Dutton, Sharon Love, Val Gebski, Alastair Gray, Guy van Hazel, Ricky A Sharma
BACKGROUND: Data suggest selective internal radiotherapy (SIRT) in third-line or subsequent therapy for metastatic colorectal cancer has clinical benefit in patients with colorectal liver metastases with liver-dominant disease after chemotherapy. The FOXFIRE, SIRFLOX, and FOXFIRE-Global randomised studies evaluated the efficacy of combining first-line chemotherapy with SIRT using yttrium-90 resin microspheres in patients with metastatic colorectal cancer with liver metastases. The studies were designed for combined analysis of overall survival...
August 3, 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28777883/electro-kinetic-separation-of-rare-earth-elements-using-a-redox-active-ligand
#12
Huayi Fang, Bren E Cole, Yusen Qiao, Justin A Bogart, Thibault Cheisson, Brian C Manor, Patrick J Carroll, Eric J Schelter
Purification of rare earth elements is challenging due to their chemical similarities. All of the deployed separations methods rely on thermodynamic properties, such as distribution equilibria in solvent extraction. Rare earth metal separations based on kinetic differences have not been examined. Herein, we demonstrate a new approach for rare earth element separations by exploiting differences in the oxidation rates within a series of rare earth compounds containing the redox-active ligand: [((2-tBuNO)C6H4CH2)3N]3-...
August 4, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28776033/isotropic-transmission-of-magnon-spin-information-without-a-magnetic-field
#13
Arabinda Haldar, Chang Tian, Adekunle Olusola Adeyeye
Spin-wave devices (SWD), which use collective excitations of electronic spins as a carrier of information, are rapidly emerging as potential candidates for post-semiconductor non-charge-based technology. Isotropic in-plane propagating coherent spin waves (magnons), which require magnetization to be out of plane, is desirable in an SWD. However, because of lack of availability of low-damping perpendicular magnetic material, a usually well-known in-plane ferrimagnet yttrium iron garnet (YIG) is used with a large out-of-plane bias magnetic field, which tends to hinder the benefits of isotropic spin waves...
July 2017: Science Advances
https://www.readbyqxmd.com/read/28773933/%C3%A2%C2%B5xrf-elemental-mapping-of-bioresorbable-magnesium-based-implants-in-bone
#14
Anna Turyanskaya, Mirjam Rauwolf, Tilman A Grünewald, Martin Meischel, Stefanie Stanzl-Tschegg, Jörg F Löffler, Peter Wobrauschek, Annelie M Weinberg, Helga C Lichtenegger, Christina Streli
This study investigated the distribution of the elemental constituents of Mg-based implants at various stages of the degradation process in surrounding bone tissue, with a focus on magnesium (Mg), as the main component of the alloy, and yttrium (Y), due to its potential adverse health effects. The measurements were performed on the implant-bearing thin sections of rat bone in a time series of implant degradation between one and 18 months. Micro X-ray fluorescence analysis (μXRF) with a special spectrometer meeting the requirements for the measurements of low-Z elements was used...
September 30, 2016: Materials
https://www.readbyqxmd.com/read/28772837/rare-earth-element-yttrium-modified-mg-al-zn-alloy-microstructure-degradation-properties-and-hardness
#15
Long Liu, Fulai Yuan, Mingchun Zhao, Chengde Gao, Pei Feng, Youwen Yang, Sheng Yang, Cijun Shuai
The overly-fast degradation rates of magnesium-based alloys in the biological environment have limited their applications as biodegradable bone implants. In this study, rare earth element yttrium (Y) was introduced into AZ61 magnesium alloy (Mg-6Al-1Zn wt %) to control the degradation rate by laser rapid melting. The results showed that the degradation rate of AZ61 magnesium alloy was slowed down by adding Y. This was attributed to the reduction of Mg17Al12 phase and the formation of Al₂Y phase that has a more active potential, which decreased galvanic corrosion resulting from its coupling with the anodic matrix phase...
April 28, 2017: Materials
https://www.readbyqxmd.com/read/28772414/microhardness-and-in-vitro-corrosion-of-heat-treated-mg-y-ag-biodegradable-alloy
#16
Marián Vlček, František Lukáč, Hana Kudrnová, Bohumil Smola, Ivana Stulíková, Monika Luczak, Gábor Szakács, Norbert Hort, Regine Willumeit-Römer
Magnesium alloys are promising candidates for biodegradable medical implants which reduce the necessity of second surgery to remove the implants. Yttrium in solid solution is an attractive alloying element because it improves mechanical properties and exhibits suitable corrosion properties. Silver was shown to have an antibacterial effect and can also enhance the mechanical properties of magnesium alloys. Measurements of microhardness and electrical resistivity were used to study the response of Mg-4Y and Mg-4Y-1Ag alloys to isochronal or isothermal heat treatments...
January 11, 2017: Materials
https://www.readbyqxmd.com/read/28767473/acquired-hemophilia-a-after-hepatic-yttrium-90-radioembolization-a-case-report
#17
Susanna Tribuzi, Alessia Naccarato, Lorella Pelagalli, Marco Covotta, Giulia Torregiani, Claudia Claroni, Ester Forastiere
Acquired hemophilia is a rare but potentially life-threatening bleeding disorder caused by the development of autoantibodies (inhibitors) directed against plasma coagulation factors, most frequently factor VIII. We report a case of a 65-year-old man with hepatocellular carcinoma who bled massively after a hepatic Yttrium-90 radioembolization procedure (Selective Internal Radiation Therapy with Yttrium-90 Resin Microspheres [SIRTex]). An acquired deficiency of factor VIII was diagnosed and successfully treated with recombinant activated factor VII and immunosuppression...
August 1, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28761290/beneficial-effect-of-low-fluence-1-064-nm-q-switched-neodymium-yttrium-aluminum-garnet-laser-in-the-treatment-of-senile-lentigo
#18
Jae-Hui Nam, Han-Saem Kim, Ga-Young Lee, Won-Serk Kim
BACKGROUND: Low fluence 1,064 nm Q-switched (QS) Neodymium:Yttrium-Aluminum-Garnet (Nd:YAG) laser treatment, also known as laser toning, is widely used for pigmentary disorders. There has been no reliable evaluation of the effect of low fluence 1,064 nm QS Nd:YAG laser for senile lentigo. OBJECTIVE: To investigate the beneficial effect of low fluence 1,064 nm QS Nd:YAG laser in the treatment of senile lentigo on the face. METHODS: A retrospective review was conducted on patients treated only with repetitive low fluence 1,064 nm QS Nd:YAG laser...
August 2017: Annals of Dermatology
https://www.readbyqxmd.com/read/28758319/treatment-options-for-unresectable-hcc-with-a-focus-on-sirt-with-yttrium-90-resin-microspheres
#19
REVIEW
Eric A Wang, Jeff P Stein, Ross J Bellavia, Scott R Broadwell
Hepatocellular carcinoma (HCC), the predominant form of primary liver cancer, is the second leading cause of cancer-related deaths across the globe. Only a small percentage of HCC patients (~20%-30%) are diagnosed at an early stage when first-line treatment options may be effective. The majority of HCC patients (>70%) are diagnosed with unresectable disease and given a poor overall prognosis. Current treatment guidelines recommend locoregional therapy with transarterial chemoembolisation (TACE) and systemic therapy with sorafenib as first-line treatment for patients with intermediate and advanced stage HCC...
July 30, 2017: International Journal of Clinical Practice
https://www.readbyqxmd.com/read/28756937/short-pulse-neodymium-yttrium-aluminium-garnet-nd-yag-1064nm-laser-irradiation-photobiomodulates-mitochondria-activity-and-cellular-multiplication-of-paramecium-primaurelia-protozoa
#20
Andrea Amaroli, Alberico Benedicenti, Silvia Ravera, Steven Parker, Wayne Selting, Isabella Panfoli, Stefano Benedicenti
Few studies exist to explore the potential photobiomodulation (PBM) effect of neodymium:yttrium-aluminium garnet (Nd:YAG) laser irradiation using a flat-top handpiece delivery system. In this study, we explored the photobiomodulation effect of that laser, on Paramecium primaurelia. The parameters for the different study groups were: 0.50W, 10Hz, 100msp, 30J/cm(2); 0.75W, 10Hz, 100msp, 45J/cm(2); 1.00W, 10Hz, 100msp, 60J/cm(2); 1.25W, 10Hz, 100msp, 75J/cm(2) and 1.50W, 10Hz, 100msp, 90J/cm(2). Our results suggest that only the parameter 0...
June 19, 2017: European Journal of Protistology
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