Motor Effects of Copper in the Caudate Nucleus: Reversible Lesions with Ion-Exchange Resin Beads

Abstract Carbonized ion exchange resin beads were prepared as catalyst for gas phase hydrogenation processes. Amberlite IR 120 polystyrene based sulfonated ion exchange beads were carbonized at 900 °C. The process of carbonization was monitored by FTIR combined thermogravimetric analysis. During the carbonization formed sulfur dioxide, carbon dioxide and organic compounds. The carbon pearls were used as catalyst support for Pd nanoparticles. The catalyst was characterized by scanning electron microscopy and X-ray diffractometry. The diameters of the palladium nanoparticles on the catalyst surface were between 15 and 50 nm, but bigger aggregates were also detected. The catalyst was tested during the gas phased heterogeneous catalytic hydrogenation of 1-butene. The hydrogenation process was followed by FTIR measurements, 93% conversion was reached after 10 min.

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Ion exchange resin beads as a carrier for growth substances

Canadian Journal of Botany ◽

10.1139/b69-214 ◽

1969 ◽

Vol 47 (9) ◽

pp. 1505-1506 ◽

Cited By ~ 7

Author(s):

H. Gee ◽

R. I. Greyson

Keyword(s):

Ion Exchange ◽

Plant Tissue ◽

Exchange Resin ◽

Ion Exchange Resin ◽

Growth Substances ◽

Considerable Potential ◽

Resin Beads ◽

Dowex 1

Dowex-1 ion exchange resin beads bind indoleacetate, naphthaleneacetate, and indoleproprionate ions and release them to plant tissue. We suggest this tool shows considerable potential in assessing the role of growth substances in morphogenesis. Some properties of IAA loaded beads are described.

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Development of pyrolytic monolithic carbon composites for the conditioning of spent ion exchange resins

MRS Proceedings ◽

10.1557/opl.2012.640 ◽

2012 ◽

Vol 1475 ◽

Author(s):

Pamela B. Ramos ◽

Néstor O. Fuentes ◽

Vittorio Luca

Keyword(s):

Ion Exchange ◽

Exchange Resin ◽

Cation Exchange Resin ◽

Processing Parameters ◽

Ion Exchange Resin ◽

Mathematical Functions ◽

Waste Forms ◽

Resin Beads ◽

Temperature Ramp ◽

Exchange Resins

ABSTRACTThe pyrolysis of ion exchange resin beads that are used for the purification of water in reactor primary- and secondary-cooling circuits can result in stable and leach resistant carbonaceous products. However, free flowing beads are less desirable waste forms for disposal in sub-surface or surface repositories than monolithic masses of low porosity. We have investigated the pyrolysis of polymeric resin – cation exchange resin composites to give mechanically robust and chemically durable monolithic carbonaceous waste forms that are suitable for repository disposition. Also investigated was the dependence of product properties on various processing parameters (temperature ramp and final temperature). As a first approach, epoxy resins were used for the preparation of monoliths since such resins cure at room temperature and result in a relatively high carbon yield. Carbonaceous monolithic products were prepared at 400, 500, 600, 700 and 800 °C using a temperature ramp of 2°C/min. The products were maintained at the chosen temperatures for a period of one hour. Mass losses, volume reduction, hardness and compressive strength were measured and mathematical functions are proposed to describe the measured values of these properties. The carbon monoliths were observed to be mechanically robust.

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