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Iron(II) ions (14.7 mmol) immobilized on chelate resin (7.53 g) adsorbed 78% of total nitrogen oxide contained in 6 dm3of nitrogen at the concentration of 1000 ppm at 25 °C. The nitrogen oxide was released rapidly by 83% of that adsorbed by raising the temperature from 25 °C to 80 °C. Adsorption and desorption cycles on this adsorbent could be performed repeatedly without deterioration.

Platinum cluster catalysts supported on chelate resin–metal complexes were prepared by reduction of platinum ions immobilized on the supports which were characteristic of high porosity. The initial rate of hydrogen uptake in the hydrogenation of olefin or diene over the catalysts increases with the surface area of the resin supports.

A new dry-type adsorbent was prepared by washing the chelate resin beads holding iron(II) with a hydrophilic organic solvent, followed by vacuum drying. It adsorbed more than 99% of nitrogen oxide from 6 dm3of nitrogen gas containing 980 ppm nitrogen oxide in 25 min. The nitrogen oxide adsorbed on the adsorbent was able to be desorbed by raising temperature up to 100 °C under vacuum.

Iron(II) ions were immobilized on the chelate resin by treating crosslinked polystyrene beads involving iminodiacetic acid moieties with iron(II) sulfate in water. The resin-immobilized Fe(II) complexes, especially those prepared with fine beads, can adsorb nitrogen oxide rapidly in water from nitrogen atmosphere containing 1000 ppm nitrogen oxide.

Exciplex emission from pyrene and N,N-dimethylaniline moieties was observed in aqueous solution by incorporating them into DNA. By using this exciplex formation, one-base deletion was successfully detected.

Diribonucleotides are efficiently hydrolyzed by the combination of the lanthanum(III) ion and hydrogen peroxide at pH 7.2 and 30 °C. The rate constant for the hydrolysis of adenylyl(3′-5′)adenosine by the mixture of La(ClO4)3(10 mmol dm−3) and H2O2(100 mmol dm−3) is 7.7 × 10−2min−1(half-life 9 min), corresponding to a 460 fold cooperative promotion of the catalysis.