Abstract: A filter for tobacco smoke containing a fibrous ion exchange resin and a fibrous ion exchange resin wherein at least a part of the fiber is fibrillated or split for use in making the filter is disclosed. The filter efficiently removes substances harmful to the human body, e.g., ionic, polar, carcinogenic, and mutagenic substances, and nicotine and tar from tobacco smoke.

Abstract: This invention relates to a method of ion-exchange and/or adsorption, and to a method of producing pure water. More specifically, this invention relates to a method of ion-exchanging and/or adsorbing an unnecessary product or a useful product in a liquid to be treated. Concretely, this invention relates to a method of ion-exchange and/or adsorption and to a method of producing superpure water by first treating the liquid with an ion-exchange resin, and then treating the liquid with an ion-exchange fiber.

Abstract: A metal ion that inhibits enzyme deactivation is bonded to a carrier and inhibits enzyme deactivation when contacted with a substrate for the enzyme. A carrier-bound metal ion such as ions of iron is particularly suitable for inhibiting deactivation of glucose isomerase when isomerizing glucose to fructose. Glucose isomerase life is remarkably prolonged by contacting carrier-bound iron ions with a glucose substrate solution prior to isomerizing with glucose isomerase.

Abstract: An enzymatically active product for use in isomerization of glucose into fructose is provided. The active product comprises an organic polymeric material predominantly comprised of a monovinyl aromatic compound polymer having .beta.-aminopropionamidomethyl group as side chains represented by the formula I: ##STR1## wherein R.sub.1 is selected from H, C(1-6) alkyl and C(2-6) hydroxyalkyl, R.sub.2 is selected from C(1-6) alkyl, C(2-6) hydroxyalkyl, ##STR2## (where X, Z.sub.1 and Z.sub.2 are selected from H and C(1-6) alkyl, and n is from 2 to 6), or R.sub.1 and R.sub.2 form together with the N atom, to which R.sub.1 and R.sub.2 are bonded, heterocyclic structure of the formula: ##STR3## where A is --CH.sub.2 --, --O-- or --NR.sub.6 -- (wherein R.sub.6 is H or C(1-6) alkyl), and R.sub.3, R.sub.4 and R.sub.5 are selected from H and methyl. The organic polymeric material has glucose isomerase immobilized with the .beta.-aminopropionamidomethyl group side chain of the organic polymeric material.

Abstract: An enzymatically active product for use in isomerization of glucose into fructose is provided. The active product comprises an organic polymeric material predominantly comprised of a monovinyl aromatic compound polymer having .beta.-aminopropionamidomethyl group as side chains represented by the formula I: ##STR1## wherein R.sub.1 is selected from H, C(1-6) alkyl and C(2-6) hydroxyalkyl, R.sub.2 is selected from C(1-6) alkyl, C(2-6)hydroxyalkyl, ##STR2## (where X, Z.sub.1 and Z.sub.2 are selected from H and C(1-6) alkyl, and n is from 2 to 6), or R.sub.1 and R.sub.2 form together with the N atom, to which R.sub.1 and R.sub.2 are bonded, a heterocylic structure of the formula: ##STR3## where A is --CH.sub.2 --, --O-- or --NR.sub.6 -- (wherein R.sub.6 is H or C(1-6) alkyl), and R.sub.3, R.sub.4 and R.sub.5 are selected from H and methyl. The organic polymeric material has glucose isomerase immobilized with the .beta.-aminopropionamidomethyl group side chain of the organic polymeric material.

Abstract: A mixed yarn having a uniform dyeability to an acid dye, which comprises at least two kinds of polyamide filaments differing in shrinkage, each consisting mainly of repeating units represented by the following general formula: ##SPC1##