搜尋結果
Calcium carbonate is a chemical compound with the chemical formula Ca CO 3. It is a common substance found in rocks as the minerals calcite and aragonite, most notably in chalk and limestone, eggshells, gastropod shells, shellfish skeletons and pearls. Materials containing much calcium carbonate or resembling it are described as calcareous.
Paracetamol ( acetaminophen [a]) is a non-opioid analgesic and antipyretic agent used to treat fever and mild to moderate pain. [13] [14] [15] It is a widely used over the counter medication. Common brand names include Tylenol and Panadol .
Budget. $6.83 billion (2024–25) Website. who.int. The World Health Organization ( WHO) is a specialized agency of the United Nations responsible for international public health. [2] It is headquartered in Geneva, Switzerland, and has six regional offices [3] and 150 field offices worldwide. [4] The WHO was established on April 7, 1948, and ...
A representation of the 3D structure of the protein myoglobin showing turquoise α-helices. This protein was the first to have its structure solved by X-ray crystallography. Toward the right-center among the coils, a prosthetic group called a heme group (shown in gray) with a bound oxygen molecule (red). Proteins are large biomolecules and ...
UNICEF ( / ˈjuːniˌsɛf / YOO-nee-SEF ), originally called the United Nations International Children's Emergency Fund in full, now officially United Nations Children's Fund, [a] is an agency of the United Nations responsible for providing humanitarian and developmental aid to children worldwide.
Veganism is the practice of abstaining from the use of animal products —particularly in diet —and an associated philosophy that rejects the commodity status of animals. [c] A person who practices veganism is known as a vegan . The foundations of veganism include ethical, moral, environmental, health and humanitarian arguments.
Franklin Delano Roosevelt [a] (January 30, 1882 – April 12, 1945), commonly known by his initials FDR, was an American politician who served as the 32nd president of the United States from 1933 until his death in 1945. He is the only U.S. president to have served more than two terms.
