Exam: TOEFL

Definition: A chemical compound that is a salt or an ester derived from oxalic acid, often found in various plants and used in some industrial processes.

Example: Spinach contains oxalate, which can affect calcium absorption in the body.

Definition: To treat a sample or specimen using a specific chemical compound known as oxalate or oxalic acid.

Example: The scientist decided to oxalate the mineral sample to analyze its composition.

Definition: Relating to a type of acid found in some plants and used in various chemical processes.

Example: The chemist studied the oxalic compounds to understand their effects on the environment.

Definition: A chemical compound that is a salt or an ester derived from oxaloacetic acid, which plays a role in metabolic processes.

Example: Oxaloacetate is important in the citric acid cycle, helping to produce energy in cells.

Definition: A type of chemical compound that has a five-membered ring made up of three carbon atoms, one nitrogen atom, and one oxygen atom, often used in medicinal drugs.

Example: Oxazole is used in the synthesis of various pharmaceuticals.

Definition: A type of fabric or a style of shoe that is often associated with formal or casual wear.

Example: He wore a pair of oxford shoes to the wedding.

Definition: A term that refers to a chemical compound formed by the reaction of oxygen with another element, typically resulting in a substance that contains oxygen and that element.

Example: Iron oxid forms when iron reacts with oxygen in the air.

Definition: A substance that causes another substance to lose electrons or hydrogen, often resulting in a chemical reaction.

Example: Oxygen is a common oxidant that helps in the combustion process.

Definition: A type of enzyme that helps speed up the process of oxidation, particularly by reacting with oxygen to change other substances.

Example: The scientist studied the oxidase to understand its role in cellular respiration.

Definition: A chemical compound that contains oxygen and another element, typically formed when a substance reacts with oxygen.

Example: Iron oxidates when it reacts with oxygen in the air, forming rust.

Definition: To combine with oxygen or to undergo a chemical reaction in which electrons are transferred, often resulting in a change in the oxidation state of a substance.

Example: When iron oxidates, it forms rust.

Definition: A chemical process where a substance combines with oxygen or loses electrons, often resulting in a change in its properties.

Example: The oxidation of iron leads to rust formation.