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Exam: Cambridge English: C1 Advanced (CAE)

hydroxylapatite

IPA: //haɪˌdrɒksɪlˈæpətaɪt//

KK: /haɪˌdrɒksɪlˈæpətaɪt/

noun

Definition: A mineral form of calcium apatite that contains hydroxyl groups, commonly found in bones and teeth.

Example: Hydroxylapatite is an important component of human bone structure.

hydroxylase

IPA: /haɪˈdrɒksɪleɪz/

KK: /haɪˈdrɒksɪleɪs/

noun

Definition: A type of enzyme that helps add hydroxyl groups to other compounds, facilitating oxidation reactions.

Example: Hydroxylase enzymes play a crucial role in the metabolism of various substances in the body.

hydroxylate

IPA: /haɪˈdrɒksɪleɪt/

KK: /haɪˈdrɒksɪleɪt/

transitive verb

Definition: To add a hydroxyl group to a chemical compound, which can change its properties and reactivity.

Example: Chemists often hydroxylate organic compounds to enhance their solubility in water.

hydroxylated

IPA: /haɪˈdrɒksɪleɪtɪd/

KK: /haɪˈdrɒksɪleɪtɪd/

adjective

Definition: Describing a substance that has undergone a chemical process where a hydroxyl group is added to it.

Example: The hydroxylated compound showed increased solubility in water.

verb

Definition: To add a hydroxyl group (–OH) to a molecule, often in the context of chemical reactions.

Example: The compound was hydroxylated to enhance its solubility in water.

hydroxylation

IPA: /haɪˌdrɒk.sɪˈleɪ.ʃən/

KK: /haɪˌdrɒk.sɪˈleɪ.ʃən/

noun

Definition: The process of adding a hydroxyl group to a molecule, which often involves replacing a hydrogen atom.

Example: Hydroxylation is an important reaction in organic chemistry that modifies the properties of compounds.

hydroxylic

IPA: /haɪˈdrɒksɪlɪk/

KK: /haɪˈdrɒksɪlɪk/

adjective

Definition: Relating to or containing hydroxyl groups, which are chemical groups made up of one oxygen atom and one hydrogen atom.

Example: The hydroxylic compounds are important in many chemical reactions.

hydroxyproline

IPA: /haɪˈdrɒk.siˌproʊ.laɪn/

KK: /haɪˈdrɒk.siˌproʊ.laɪn/

noun

Definition: A modified form of the amino acid proline that is found in collagen and is important for the structure of connective tissues in the body.

Example: Hydroxyproline is essential for maintaining the strength and stability of collagen in our skin and joints.

hydroxyurea

IPA: /haɪˌdrɒksɪˈjʊə.rɪ.ə/

KK: /hɪˌdrɒksɪˈjʊəriə/

noun

Definition: A medication used to treat certain types of cancer and blood disorders by reducing the production of blood cells in the bone marrow.

Example: The doctor prescribed hydroxyurea to help manage the patient's sickle cell anemia.

hygrograph

IPA: /haɪˈɡrɒf/

KK: /haɪˈɡrɒf/

noun

Definition: A device that automatically measures and records changes in the amount of moisture in the air.

Example: The scientist used a hygrograph to monitor humidity levels in the greenhouse.

hygrometric

IPA: /haɪˈɡrɒmɛtrɪk/

KK: /haɪˈɡrɒmɛtrɪk/

adjective

Definition: Related to the measurement of humidity or moisture in the air.

Example: The hygrometric readings indicated a high level of humidity in the room.

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