Dissolution
Dissolution is the state in which a substance is dissolved in a solvent. A dissolved substance is uniformly dispersed in a solvent and is invisible.
Entries by 天川希理
Molds of the genus Aspergillus
Molds of the genus Aspergillus are a group of fungi found in various environments, such as soil, plant debris, and air. They can be a source of contamination of food and feed, and under certain conditions can cause infections in humans and animals. On the other hand, some species are used to produce fermented foods.
Solvent
A solvent is a liquid in which a solute is dissolved.
Dihydric phenol
Dihydric phenol is a chemical compound in which two of the six hydrogen atoms of benzene are replaced by hydroxyl groups. The number of hydrogen atoms substituted into the hydroxyl group is the valence, and depending on which two of the six hydrogen atoms are substituted, there are three different positional isomers (ortho, meta, and para positions). All of them […]
Keratinocyte
Keratinocytes are the cells that make up the majority of the epidermis. They are produced in the basal layer and migrate toward the spinous layer, granular layer, and horny layer through repeated cell division. During this process, they change their shape, composition, and function into spinous cells, granular cells, and horny cells, and finally form scales peel off from the […]
Tyrosine
Tyrosine is a type of amino acid that contains phenol within its chemical structure. It is a precursor of the thyroid hormones thyroxine and melanin, among others. Tyrosinase, which has phenol oxidizing activity, catalyzes and contributes to the synthesis reaction of melanin from tyrosine.
Basal layer
The basal layer is included in the epidermis as a skin structure and is the deepest layer of the epidermis that is composed of basal cells. It has the basement membrane on its adhesive surface with the dermis, which transfers nutrients to and from the dermis and regulates the function of epidermal cells.
Aggravating factor
Aggravating factor is a cause that makes a medical condition or symptom worse.Also called exacerbating factors. They range from specific allergens that worsen allergic reactions, to lifestyle habits such as smoking and alcohol consumption that exacerbate the disease, drug interactions and psychological stress.
Tyrosinase
Tyrosinase is the enzyme responsible for the melanogenic reaction from tyrosine. It is also known by another name as monophenol monooxygenase. When the skin is exposed to UV light or other stimuli, a signal transmitter flows from keratinocytes to melanocytes, activating tyrosinase, which catalyzes the aforementioned synthetic reaction.
Catalyst
A catalyst is a substance that increases the rate of reaction of a particular chemical reaction. This action occurs by adsorption of molecules on the surface of the catalyst.