Abstract: In an aspect, the present disclosure provides a method for producing an extract composition by which polyphenols such as apigenin and/or essential oil components such as spiro-ether can be efficiently extracted from harvested herbaceous plants. An aspect of the present disclosure is directed to a method for producing an extract composition, including processes (1) and (2) below: (1) applying an oxidative stress to a harvested herbaceous plant and preserving it; and (2) obtaining an extract from the herbaceous plant that has undergone the process (1).

Abstract: In one aspect, provided is a cleaning agent composition for a substrate for a semiconductor device, the cleaning agent composition having excellent cleaning properties against ceria and being capable of reducing a temporal change in the solubility of ceria. In one aspect, the present disclosure relates to a cleaning agent composition for a substrate for a semiconductor device, the cleaning agent composition containing a component A, a component B, a component C, and a component D, the component A being sulfuric acid; the component B being ascorbic acid; the component C being at least one of thiourea and dithiothreitol and the component D being water.

Abstract: In one aspect, provided is a cleaning agent composition for a substrate for a semiconductor device, the cleaning agent composition having excellent cleaning properties against ceria and being capable of reducing a temporal change in the solubility of ceria. In one aspect, the present disclosure relates to a cleaning agent composition for a substrate for a semiconductor device, the cleaning agent composition containing a component A, a component B, a component C, and a component D, the component A being sulfuric acid; the component B being ascorbic acid; the component C being at least one of thiourea and dithiothreitol; and the component D being water.