Unique chewing gum compositions possessing anti-caries activity characteristics comprising a chewing gum base having incorporated therein at least one anti-microbial agent comprising saturated or unsaturated, substituted or unsubstituted, conjugated or unconjugated dialdehydes. The chewing compositions can and preferably do contain conventional adhesive as well as conventional flavoring agents.

An odorless sterilizing and disinfecting solution containing 0.025 to 1.0 weight percent phthalaldehyde.

Disinfectant compositions are provided which contain a dialdehyde and an alkali metal salt of a hydrocarbon carboxylic acid in aqueous solution and, optionally, an alcohol and/or a diol and/or a triol, and are as potent as, but substantially more stable than, known dialdehyde-containing disinfectant compositions. A method for disinfecting medical and surgical supplies and household objects is also provided wherein the above disinfectant compositions are employed.

The present invention relates to a method for preparing an aromatic dialdehyde, comprising, a) a step of gas phase oxidation reaction for preparing aromatic dialdehyde from dimethyl benzene; b) a step of separation for selectively recovering crude aromatic dialdehyde of molten phase from the reaction product of the step (a); and c) a step of purification for obtaining highly pure aromatic dialdehyde by purifying said crude aromatic dialdehyde, and a manufacturing system used for the preparation ...

Water-insoluble, biologically active conjugates for use in a reactor core of a flow-through reactor are prepared by covalently bonding an enzyme directly to a fibrous dialdehyde cellulose such as cotton. Preferably the fibrous cellulose is placed in the reactor core of a flow-through reactor before or after it is treated with periodic acid solution to convert glucose units thereof to units containing dialdehyde groups. Thereafter, an enzyme solution is passed through the resultant dialdehyde cel...

Dialdehyde cellulose is produced by reacting cellulose in aqueous medium with meta periodate ion used in a molar ratio of from 1.2 to 12 moles of meta periodate ion per mole of cellulose at a temperature of from 36.degree. to 60.degree. C. and a pH of between 2 and the conversion pH of water soluble meta periodate to water insoluble para periodate, and separating the dialdehyde cellulose product from the reaction mixture.

A disinfecting and sterilizing concentrate containing an aromatic dialdehyde and a neutral pH buffering system is provided. Aromatic dialdehyde concentrations of greater than 5 w/w % are achieved while maintaining the stability of the buffering system. A method and a kit for preparing a disinfecting and sterilizing concentrate is also provided.

A disinfecting and sterilizing concentrate containing an aromatic dialdehyde and a neutral pH buffering system is provided. Aromatic dialdehyde concentrations of greater than 5 w/w% are achieved while maintaining the stability of the buffering system. A method and a kit for preparing a disinfecting and sterilizing concentrate is also provided.

A method of attaching dialdehyde starch to surfaces is disclosed. A substrate to which substances may be coupled, which substrate comprises at least one surface coated with dialdehyde starch, and products produced utilizing the substrate are also provided.

Aminated .gamma.-dialdehyde and the quaternary ammonium salts thereof are prepared by acid hydrolysis of their respective corresponding 2,5-dialkoxy 3-amino 4-hydroxy tetrahydrofurans or by acid hydrolysis of their respective corresponding tetraalkyl acetals. The aminated .gamma.-dialdehydes and the quaternary ammonium salts thereof are usefully employed in cosmetic compositions to tan the skin or to strengthen or restructure the hair.