tả tuyền

Một học sinh quan sát tả tuyền trong phòng thí nghiệm.

Definition

1. Adjective:
   • Levorotatory: In physics and chemistry, describes a substance that rotates the plane of polarized light to the left (counter-clockwise when facing the oncoming light). This is an optical property of certain molecules, often isomers.

Usage Examples

• Adjective:
  • Đường fructose là một đồng phân tả tuyền. (Fructose is a levorotatory isomer.)
  • Hoạt tính quang học của hợp chất này được xác định là tả tuyền. (The optical activity of this compound was determined to be levorotatory.)

Advanced Usage

• This term is highly specialized and primarily used in scientific contexts such as optics, organic chemistry, and pharmacology to describe chiral molecules.

Variants and Related Words

• Quay trái (v): to rotate left (general term, not specific to optics).
• Đồng phân quang học (n): optical isomer.
• Hữu tuyền (adj): dextrorotatory (the opposite property, rotating light to the right).

Synonyms

• Levorotatory: The direct and most precise scientific synonym.
• Left-rotating: A descriptive, less technical synonym.

Notes on Usage

• "Tả tuyền" is a formal, technical term. It is not used in everyday conversation. The symbol "(-)" or a lowercase "l" is often used in scientific notation to denote this property.
• It is frequently contrasted with its opposite, "hữu tuyền" (dextrorotatory).