Lactococcus is a genus of lactic acid bacteria that were formerly included in the genus Streptococcus Group N1. They are known as homofermentors meaning that they produce a single product, lactic acid in this case, as the major or only product of glucose fermentation.Their homofermentative character can be altered by adjusting cultural conditions such as pH, glucose concentration, and nutrient limitation.They are gram-positive, catalase-negative, non-motile cocci that are found singly, in pairs, or in chains. The genus contains strains known to grow at or below 7ËC.Nine species of Lactococcus are currently recognized along with four subspecies.hey are gram-positive, catalase-negative, non-motile cocci that are found singly, in pairs, or in chains. The genus contains strains known to grow at or below 7ËC. Nine species of Lactococcus are currently recognized along with four subspecies.
Where frequency-division multiplexing is used as to allow multiple users to share a physical communications channel, it is called frequency-division multiple access (FDMA). FDMA is the traditional way of separating radio signals from different transmitters.
With Frequency Division Multiple Access (FDMA) , different signals are assigned frequency channels. A channel is a frequency. FDMA is a basic technology in the analog Advanced Mobile Phone System (AMPS). With FDMA, each channel can be assigned to only one user at a time.his technology is used in ultra-high-frequency (UHF) cellular telephone systems in the 800-MHz and 1.9-GHz bands. Reference: 1. CDMA Theory and Nortel Networks Product Design and Function, Student Guide, July 2000.