90Y-labeled tin fluoride colloid as a promising therapeutic agent: Preparation, characterization, and biological study in rats

Scopus: In this study, tin fluoride colloid (SnF-c) was prepared, labeled with yttrium-90 ( 90Y), and characterized with respect to its physicochemical properties and biological behavior in an animal model. Particle size of SnF-c, at constant concentration of SnF 2, was dependent on pH, concentration of sodium fluoride (NaF), temperature, and time. The particle size of SnF-c decreased with an increase in NaF concentration and a decrease in reaction mixture pH. Radiolabeling yield of 90Y-SnF-c at higher temperature increased and it was greater than 98% for the preparation at 95'C. The 90Y-SnF-c demonstrated high in vitro stability both in human serum and human synovial fluid at 37'C up to 7 days. In vivo distribution studies in healthy male Wistar rats of 90Y-SnF-c (particles <1 μm), following intravenous administration, revealed that the localization takes place preferably in the liver. The 90Y-SnF-c (particles >1 μm) was well retained in the synovial space for 96 h after intra-articular injection, whereas leakage of 90Y from the joint was 1.96% over this period. Because of high labeling yield and stability, 90Y-SnF-c might be a promising agent for radiosynovectomy or therapy of liver malignancies

Dehydrogenation of n-butane to butadiene over Pt-Sn/MgO-Al 2O 3

Scopus: Butadiene demand is expected to increase rapidly, particularly in developing countries. We developed a new production process of butadiene that will allow suppliers to produce sufficient amount of butadiene. In this study, we focused on n-butane dehydrogenation, and evaluated the activity of Pt-Sn catalysts supported on Fe 2O 3-Al 2O 3, ZnO-Al 2O 3 and MgO-Al 2O 3 prepared by the co-precipitation method. Pt-Sn/MgO-Al 2O 3 (Mg/Al = 1/2) showed the highest activity and butadiene yield. Support composition of MgO-Al 2O 3 influenced the catalyst activity. The catalysts underwent deactivation owing to coke deposits over the catalyst, and their activity was recovered after regeneration treatment. Addition of Mg was effective in suppressing coke formation, as revealed by TG-DTA analysis. Reaction temperature and Sn/Pt molar ratio were changed effectively in order to increase the butadiene yield, and the results showed that Sn suppresses the side reaction over the support surface. Sintering of Pt particles was inhibited by the addition of Mg and Sn

Preparation and characterization of tin oxide, SnO 2 nanoparticles decorated graphene

Scopus: SnO 2 nanoparticles/graphene (SnO 2/GP) nanocomposite was synthesized by a facile microwave method. The X-ray diffraction (XRD) pattern of the nanocomposite corresponded to the diffraction peak typical of graphene and the rutile phase of SnO 2 with tetragonal structure. The field emission scanning electron microscope (FESEM) images revealed that the graphene sheets were dotted with SnO 2 nanoparticles with an average size of 10 nm. The X-ray photoelectron spectroscopy (XPS) analysis indicated that the development of SnO 2/GP resulted from the removal of the oxygenous groups on graphene oxide (GO) by Sn 2 ions. The nanocomposite modified glassy carbon electrode (GCE) showed excellent enhancement of electrochemical performance when interacting with mercury(II) ions in potassium chloride supporting electrolyte. The current was increased by more than tenfold, suggesting its potential to be used as a mercury(II) sensor


Lim, H.N.a , Nurzulaikha, R.b, Harrison, I.b, Lim, S.S.b, Tan, W.T.a, Yeo, M.C.a, Yarmo, M.A.c, Huang, N.M.d  
a  Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
b  School of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia
c  School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43000 Bandar Baru Bangi, Selangor, Malaysia
d  Department of Physics, Low Dimensional Materials Research Centre, University of Malaya, 53400 Kuala Lumpur, Selangor, Malaysia

Some considerations on processing cassiterite-bearing polymetallic sulphide ores in China

Scopus: Tin resources are mainly distributed in Yunnan and Guangxi autonomous regions, China. Tin ores in these areas are characterized by polymetallic constituents, including copper, zinc, lead and other associated elements that can be recovered. Due to the complex mineral composition and texture of the ores, gravity concentration, flotation as well as some combined processing techniques used in some major concentrators are reviewed and discussed. Case study shows that the comprehensive utilization of the tin ores can be realized to produce some marketable products for smelters. But much work on recovery of the fine fractions of tin shall still be done to get a good processing performance for the resource sustainable development.

Research of preparation and ultraviolet shielding for nanometer powder of tin dioxide coated with zinc oxide

Scopuss: The preparation of tin dioxide coated with zinc oxide nanometer powder by factional homogeneous precipitation method is reported in this paper. The diameter of prepared nanometer powder is 32nm. UV shielding, XRD, SEM and EDS of prepared nanometer powder have been investigated. The results show that tin dioxide coated with zinc oxide nanometer powder has excellent UV-shielding performance, and the UV shielding characteristic is better than single tin dioxide or zinc oxide used.

New metal alloy electrode designed for plus-sized ions

PhysOrg: Storing energy from wind farms and releasing that electricity on demand requires high-capacity, low-cost batteries; sodium-ion batteries could be part of the answer now, thanks to fundamental insights garnered by scientists at Pacific Northwest National Laboratory. Instead of force-fitting larger sodium ions into the battery electrodes built for much smaller lithium ions, the research team designed an electrode based on the ion's character, not its circumference. The new electrode or anode is built from a tin and antimony alloy, with specially designed carbon support. This durable new material can store nearly twice as much energy as a carbon electrode in the popular lithium-ion battery.

Metals for Energy & Environment 2012

Metals for Energy & Environment 2012 - by Metal-Pages: etals for Energy & Environment 2012
When & Where
6 - 8 Jun 2012
Las Vegas, United States
Register now for only USD 1999,-
General information
Programme
Who is attending?
Venue/hotel information
Questions?

Programme
This event takes place in the Green Valley Ranch resort in Las Vegas, for more information and to book a hotel room check out the


Keynote Presentations
09:00 "An update on Mountain Pass and the Rare Earth Market," Mark Smith, President and Chief Executive Officer of Molycorp, Inc., USA
09:30 "Rare Earths and the Challenges of Change in China", Clint Cox, President The Anchor House, Inc., USA
10:00 "Magnets for green energy and the environment," Ed Richardson, President, United States Magnetic Materials Association, USA

10:45 Networking Coffee break

11:15 "Critical materials - supply perspectives - USA", Ron MacDonald, Chairman, American Vanadium Corp, Canada
11:45 "Critical materials – supply perspectives - Europe," speaker to be announced
12:15 "Molybdenum sustainability and the environment," Tim Outteridge, Secretary-General, International Molybdenum Association, UK

13:00 Networking lunch sponsored by Molycorp

14:30 “Wind turbines – market growth and metals demand,” speaker to be announced
15:00 “The global solar silicon market - Where to now?” James May - Chairman and CEO, Midland Siilicon Company LLC, USA
15:30 “Indium, Gallium, Selenium, Cadmium and Tellurium for the solar market,” speaker to be announced

16:00 Close of first day’s session followed by networking coffee and tea

18:00 Networking cocktail party (ends 20:00)


Friday, 8 June

09:30 “The influence of new projects on the supply of rare earths 2013-2020,” John Kaiser, Editor, Kaiser Research Online, USA
10:15 "Will the Global Rare Earth Supply Chain Preclude America from Competing in Green Technology Manufacturing?" Michael Silver, CEO, American Elements, USA

11:00 Networking refreshment break

11:30 "Shoring Up the Grid: Vanadium and Energy Storage," Jon Hykawy, head of global research, Byron Capital Markets, Canada
12:00 “Recycling a critical source of raw materials,” speaker to be announced

12:30 Lunch

14:00 “Cleaning the Sky - The role of Cobalt Containing Aerospace Superalloys,” David Weight, Director and General Manager, Cobalt Development Institute, UK
14:30 “Electric Vehicles, developments and market trend,” speaker to be announced
15:00 “Catalysts and a clean environment”, speaker to be announced

Optimization of two-wire Arc thermal spray process for the production of free-standing Tin alloy coating

Scopus: The present work deals with the optimisation of Tin alloy free-standing coating/component through two-wire arc thermal spray process. The production process was optimised using Taguchi L9 orthogonal array (OA) experiment methodology. The four major spray process factors with three levels: the voltage, current, spray distance and air pressure were taken into the study. For optimum mechanical properties of free-standing Tin alloy thermal coating, the current was found to be the most significant parameter and inversely proportional to the arc current. The process parameters of two-wire arc spray machine were: spray distance 175 mm, air pressure 60 PSI (413kPa), voltage 22V and current 200 A. This free-standing Tin alloy sheet can be used for sheet composite material when plastic/carbon fibre cladding is done on it. It was confirmed by SEM analysis that this freestanding Tin alloy coating was dense

Smelting and mining BAT UK

Defra, in conjunction with the devolved administrations, is currently undertaking a six-year review of process guidance (PG) notes for Part B activities under UK environmental permitting and pollution prevention and control (PPC) legislation. These PG notes constitute statutory guidance on best available techniques (BAT) for the control of emissions into the air from installations under the Local Authority Pollution Prevention and Control (LAPPC) regime.

A number of draft PG notes have now been published for consultation, where:
•    ten relate to the minerals sector, covering quarry processes, roadstone coating, and the processing and use of bulk cement, among other things; and

•    seven relate to the metals sector, covering furnaces used for the extraction of non-ferrous metal from scrap melting and the process of melting and casting aluminium and its alloys, among other things.