Journal of Biomedicine is a multidisciplinary journal publishing papers of high quality in the study of biology, biological processes and application in medicine. Examples of topic areas are molecular medicine, gene therapy, cancer biology, immunobiology, pharmacogenomics, drug delivery and discovery, chemical biology, pharmacology, physiology, and basic or clinical researches in various diseases. Biomedicine is a branch of medical science that applies biological and physiological principles to clinical practice. Biomedicine stresses standardized, evidence-based treatment validated through biological research, with treatment administered via formally trained doctors, nurses, and other such licensed practitioners. Biochemistry is the science of the chemical processes which takes place within living organisms. Living organisms need essential elements to survive, among which are carbon, hydrogen, nitrogen, oxygen, calcium, and phosphorus. These elements make up the four macromolecules that living organisms need to survive: carbohydrates, lipids, proteins, and nucleic acids Proteins are chains of amino acids that function , among other things, to contract skeletal muscle, as catalysts, as transport molecules, and as storage molecules. Protein catalysts can facilitate biochemical processes by lowering the activation energy of a reaction. Hemoglobins are also proteins, carrying oxygen to an organism's cells. Lipids, also known as fats, also serve to store energy over the long term. Due to their unique structure, lipids provide more than twice the amount of energy that carbohydrates do. Lipids can be used as insulation.