Synthetic, or human-made dyes, were originally derived from coal tar. Synthetic dyes have a wider and brighter color range, longer color permanence, and are faster, easier and cheaper to produce than natural dyes. There are over 10,000 different types of synthetic dyes.
Natural dyes were used before the discovery of synthetic dyes and are mostly made from plant sources such as leaves, wood and fungi. Although using natural dyes may seem better or healthier, they are actually often no safer or more environmentally friendly than using synthetic dyes. Many natural dye sources can be highly toxic or poisonous, such as logwood and rhubarb leaves.Learn More
Biological value is a measurement that determines whether the body has use for a nutrient or if it is not essential to survival. All proteins are made from amino acids; when a protein has the right amount of key amino acids, it is a high biological value protein. When a protein has a low value, it needs to accompany another complementing protein to help the body.Full Answer >
Organic compounds contain carbon, and almost all organic compounds contain hydrogen, with many also comprised of additional atoms of nitrogen, oxygen or sulfur. Not all compounds that contain carbon, however, can be considered organic. Metallic alloys that contain carbon, such as steel for example, would not be universally considered organic, mainly because they are not involved in biological processes.Full Answer >
Carbon possesses physical and chemical properties. Carbon is a non-metal that is a soft, gray substance that a person can rub between the fingernails. The element can appear jet black as well. Carbon forms the allotropes graphite, diamond and coal (amorphous). There are thousands of carbon compounds that are essential to organic life.Full Answer >
There are 20 different common amino acids that act as the building block for proteins. Humans are able to produce 10 of the amino acids, but must obtain the other 10 through their diet.Full Answer >