ACAS is being used to describe short-range systems intended to prevent actual metal-on-metal collisions. In contrast, ASAS is being used to describe longer-range systems used to maintain standard en route separation between aircraft (5 nm {9.25 km} horizontal /1000' {305 m} vertical). Obstacle Collision Avoidance System is a ground based system that uses a low powered radar mounted on or near the obstacle. 2  The radar detects aircraft in the proximity of the obstacle and firstly warns aircraft via flashing medium intensity lights and secondly warns aircraft of the obstacle via a VHF broadcast.
Biotechnology - applied science that is concerned with biological systems, living organisms, or derivatives thereof, to make or modify products or processes for specific use. Botany - the scientific study of plants. Cell biology - the study of cells at the microscopic or at the molecular level. It includes studying the cellsâ physiological properties, structures, organelles, interactions with their environment, life cycle, division and apoptosis. Chronobiology - a science that studies time-related phenomena in living organisms.
1 Observe action of microorganisms upon living tissues of plants, higher animals, and other microorganisms, and on dead organic matter. 2  Study the structure and function of human, animal and plant tissues, cells, pathogens and toxins. 3  Conduct chemical analyses of substances such as acids, alcohols, and enzymes.