角田光代の "Woman on the Other Shore" を読んでいます。
"Lime scale forms when calcium and magnesium salts react with the air and precipitate to form a film on surfaces in contact with water. Agents for removing the scale contain abrasives, surfactants, acids, alkalis, and solvents."
今日は上に出てきた "surfactants" を覚えたい。
・Oxford English Dictionary: A substance which tends to reduce the surface tension of a liquid in which it is dissolved.: The primary conditioning ingredients are cationic surfactants, silicones, and polymers.
・Collins Dictionary: Also called: surface-active agent: a substance, such as a detergent, that can reduce the surface tension of a liquid and thus allow it to foam or penetrate solids; a wetting agent: A surfactant is a substance which is added to a process to reduce the surface tension of one or more components.
・Merriam-Webster's Online Dictionary: a surface-active substance (such as a detergent): My formula is 1 gallon of 8% to 10% (100 grain) white vinegar, 1 ounce of orange oil (D-limonene), and 1 teaspoon of liquid soap or other surfactant.
"surfactants" は "surface-active agent" と分かれば容易に覚えられます。日本語で言う界面活性剤ですね。
"Lime scale forms when calcium and magnesium salts react with the air and precipitate to form a film on surfaces in contact with water. Agents for removing the scale contain abrasives, surfactants, acids, alkalis, and solvents."
今日は上に出てきた "surfactants" を覚えたい。
・Oxford English Dictionary: A substance which tends to reduce the surface tension of a liquid in which it is dissolved.: The primary conditioning ingredients are cationic surfactants, silicones, and polymers.
・Collins Dictionary: Also called: surface-active agent: a substance, such as a detergent, that can reduce the surface tension of a liquid and thus allow it to foam or penetrate solids; a wetting agent: A surfactant is a substance which is added to a process to reduce the surface tension of one or more components.
・Merriam-Webster's Online Dictionary: a surface-active substance (such as a detergent): My formula is 1 gallon of 8% to 10% (100 grain) white vinegar, 1 ounce of orange oil (D-limonene), and 1 teaspoon of liquid soap or other surfactant.
"surfactants" は "surface-active agent" と分かれば容易に覚えられます。日本語で言う界面活性剤ですね。
トータル
