-
Categories
-
Pharmaceutical Intermediates
-
Active Pharmaceutical Ingredients
-
Food Additives
- Industrial Coatings
- Agrochemicals
- Dyes and Pigments
- Surfactant
- Flavors and Fragrances
- Chemical Reagents
- Catalyst and Auxiliary
- Natural Products
- Inorganic Chemistry
-
Organic Chemistry
-
Biochemical Engineering
- Analytical Chemistry
-
Cosmetic Ingredient
- Water Treatment Chemical
-
Pharmaceutical Intermediates
Promotion
ECHEMI Mall
Wholesale
Weekly Price
Exhibition
News
-
Trade Service
the highest level of units on a common unit on a biological class system. In the past, all living things were divided into plant and animal boundaries for a long time. Subsequently, it was suggested that organisms should be divided into 3
boundaries, namely, plant, animal and primary biology, and later it was suggested that primary nuclear organisms should become independent of the original nuclear biological community, and organisms should be divided into
4
boundaries, and then
fungus
is also divided into one sector, the
5
sector, and in recent years, according to the characteristics of the virus, it has been classified as the
6th
virus boundary of the organism.