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.
For the radio station, see DWDM-FM. In fiber-optic communications, wavelength-division multiplexing (WDM) is a technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths (i.e., colors) of laser light.t this stage, a basic DWDM system contains several main components: 1  A DWDM terminal multiplexer. 2  An intermediate line repeater is placed approximately every 80â100 km to compensate for the loss of optical power as the signal travels along the fiber. 3  An intermediate optical terminal, or optical add-drop multiplexer. 4  A DWDM terminal demultiplexer. 5  O