Nuc med providers brace for long moly-99 shortage
Nuclear medicine providers can expect molybdenum-99 shortages until at least September while North America’s primary source of medical isotopes is shut down for repairs.
Materials Literature
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Reciclagem primária de ABS: propriedades mecânicas, térmicas e reológicas
A reciclagem primaria do ABS Poli(acrilonitrila butadieno estireno) para fins de incorporacao dos rejeitos dentro do processo produtivo foi o tema principal desse trabalho. Muito se tem pesquisado sobre reciclagem de rejeitos oriundos do final do ciclo de vida de um produto manufaturado, no entanto existe uma fonte de…
Katalysator-Sorbent-Komposite für die Wassergas-Shift-Reaktion
Die Nutzung fossiler Brennstoffe zur Deckung des Energiebedarfes liefert intensiven Diskussionsstoff, u.a. wegen des erzeugten Kohlendioxids (CO2). Eine Minderung der emittierten CO2 Mengen kann durch die Entwicklung fortschrittlicher Technologien zur Effizienzsteigerung, CO2-Abscheidung etc. erreicht werden. Diese Ve…
INFLUÊNCIA DE DIFERENTES COMBINAÇÕES DE LÂMINASDE Eucalyptus saligna E Pinus taeda EM PAINÉIS ESTRUTURAIS LVL
Investigou-se a influencia do posicionamento de lâminas de madeira de Eucalyptus saligna e Pinus taeda nas camadas componentes de paineis estruturais Laminated Veneer Lumber (LVL). Os paineis foram manufaturados em seis diferentes combinacoes de cinco lâminas de 3,2 mm de espessura, coladas com adesivo fenolformaldeid…
Degradação do PMMA através da reação despolimerização uitlizando catalisadores de óxidos mistos
In this work, mixed oxides were synthesized by two methods: polymeric precursor and gel-combustion. The oxides, Niquelate of Lanthanum, Cobaltate of Lanthanum and Cuprate of Lanthanum were synthesized by the polymeric precursor method, and treated at 300 º C for 2 hours, calcined at 800 º C for 6h in air atmosphere. I…
Разработка технологии производства стержневой термомеханически упрочненной арматурной стали марки А700HW периодических профилей № 12, 14, 16 по требованиям финского стандарта SFS 1216 в условиях мелкосортного стана 320 РУП «БМЗ»
Перед инженерными и технологическими службами технического управления и сортопрокатного цеха РУП «БМЗ» была поставлена задача – проработать техническую возможность производства арматуры марки A700HW и провести комплекс работ по подготовке к сертификации продукции с целью исключения монополии фирмы FUNDIA по изготовлен…
Inkrementelles Umformen von hochfesten Aluminiumlegierungen
Kurzfassung Die Anforderungen an Verbindungselemente im Leichtbau steigen stetig an. Zunehmend kommen festere und leichtere Materialien zum Einsatz. Oftmals geht jedoch mit der Anwendung von Leichtbauwerkstoffen mit erhöhten Festigkeiten eine verminderte Verarbeitbarkeit einher. Es entstehen auch hohe Anforderungen an…
Electrochemical Surface Modification: Thin Films, Functionalization and Characterization. From the series, Advances in Electrochemical Science and Engineering, Volume 10
ADVERTISEMENT RETURN TO ISSUEPREVBook ReviewNEXTElectrochemical Surface Modification: Thin Films, Functionalization and Characterization. From the series, Advances in Electrochemical Science and Engineering, Volume 10Keith J. StineView Author Information University of Missouri—St. LouisCite this: J. Am. Chem. Soc. 200…
Неметаллические включения в сталях марок 80 и 42Cr4Mo2
В лаборатории металловедения ЦЗЛ была проведена исследовательская работа, целью которой являлась проверка эффективности работы циркуляционного вакууматора RH. Было исследовано 10 плавок стали марок 80 и 42Сr4Mo2 на предмет загрязненности неметаллическими включениями.
Topology and Telechelic Functionality Control in Polyester Design
Research efforts have focused on synthesis of linear, long-chain branched, and novel crosslinked polyesters for applications spanning from pressure sensitive adhesives to biomedical applications. Altering polymer topology and functionality using different synthetic strategies was enabled tailoring the thermomechanical…
catena-Poly[[(nitrato-κ2O,O′)silver(I)]-μ3-4-pyridone-κ3O:O:O]
In the title complex, [Ag(NO(3))(C(5)H(5)NO)](n), the Ag(I) atom is coordinated by two O atoms from two different 4-pyridone ligands and two O atoms from one nitrate anion, displaying a nearly planar coordination geometry. The O atoms of two 4-pyridone ligands bridge two symmetrically related AgNO(3) units, forming a…
ANALISIS DISTRIBUSI TEGANGAN PADA SAMBUNGAN DUA KACA MENGGUNAKAN SILICONE SEALENT DENGAN METODE FOTOELASTISITAS
Telah dilakukan penelitian untuk menganalias lem silicone sealant pada rsambungan dua bahan kaca dengan ketebalan 1mm, 2mm, 3mm, dan 4mm menggunakan metode fotoelastisitas polariskop lingkaran. Pemberian gaya luar dengan tumpuan berbentuk silindrik pada empat lokasi titik yang berbeda yaitu dua titik pada permukaan ba…
Aditiva užívaná pro snížení hořlavosti styrenových kopolymerů
In this work, the fundamental ideas of polymer combustion are explained. The principle of combustion and possibility its influence is described. This work mainly focuses to the flame retardation of styrene copolymers - high impact polystyrene (HIPS) and acrylonitrile-butadiene-styrene (ABS). Next this thesis describes…
PENGARUH ION ALUMINIUM PADA KOROSI BAJA KARBON RENDAH AISI 1020 DALAM LARUTAN 1M NaCl
Telah dilakukan pengamatan perilaku korosi pada baja karbon rendah AISI 1020 dalam medium 1M NaCl pada temperatur 300C dan 600C dengan variasi penambahan inhibitor ion Al3+ sebesar 1,1026 gr/L, 1,5112 gr/L, 2,0189 gr/L. Hasil pengujian menunjukkan pada penambahan inhibitor ion Al3+ 2,0189 gr/L untuk temperatur 300C se…
Status of available testing methods and standardization
Investigations of damage evolution and life prediction methodologies of thermal barrier coating (TBC-) systems pose a current challenge. In order to determine properties of TBC system components (bond coat, thermal grown oxide layer (TGO) and ceramic top coat) testing methods have been developed following the strategy…
Syndiotactic Polypropylene: Structure, Properties and Application
This Bachelor thesis is dedicated to syndiotactic polypropylene. First part contents general account about polypropylene and its possible stereoisomers. The second part is aimed on polymerization of syndiotactic polypropylene by metallocene catalysts and four crystalline forms are described. At the end of second part…
[5,10,15,20-Tetrakis(4-chlorophenyl)porphyrinato]bis(tributylphosphine)cobalt(III) perchlorate
In the mol-ecule of the title compound, [Co(C(44)H(24)Cl(4)N(4)){(C(4)H(9))(3)P}(2)]ClO(4), the Co(III) centre has a slightly distorted octa-hedral geometry and is coordinated by four N atoms of the tetra-pyrrolic ring in the equatorial positions and two phosphine ligands in the axial positions. The dihedral angles be…
MyCrystals– a simple visual data management program for laboratory-scale crystallization experiments
MyCrystalsis designed as a user-friendly program to display crystal images and list crystallization conditions. The crystallization conditions entry fields can be customized to suit the experiments.MyCrystalsis also able to sort the images by the entered crystallization conditions, which presents a unique opportunity…
Crecimiento selectivo de InAs sobre substratos grabados de GaAs(001) mediante litografía de oxidación local por AFM
Tesis leida el 29 de mayo de 2009 en el Departamento de Fisica de la Materia Condensada de la Universidad Autonoma de Madrid.
Theory and Application of Porous Electrodes in Fuel Cell Characterization
The most common method used to characterize the electrochemical performance of fuel cells is recording of current/voltage U(i) curves. Separation of electrochemical and ohmic contributions to the U(i) characteristics requires additional experimental techniques like Electrochemical Impedance Spectroscopy (EIS). The app…