. Deep-ocean biodeterioration of materials. Materials; Marine sediments. Figure 7. A 1-inch-long holothurian (sea cucumber) found in a sediment sample. Antibiotic-Producing Marine Bacteria A bacteriological analysis was made of a sediment sample obtained from a depth of 1,500 feet of water off the coast of Port Hueneme during the early phase of this study. On one of the Petri dishes (pour plate) inoculated with the sediment sample and incubated for several days at 15°C, a relatively clear area surrounding one of the bacterial colonies was observed. The orange-pigmented bacteria had apparently
. Deep-ocean biodeterioration of materials. Materials; Marine sediments. Figure 7. A 1-inch-long holothurian (sea cucumber) found in a sediment sample. Antibiotic-Producing Marine Bacteria A bacteriological analysis was made of a sediment sample obtained from a depth of 1,500 feet of water off the coast of Port Hueneme during the early phase of this study. On one of the Petri dishes (pour plate) inoculated with the sediment sample and incubated for several days at 15°C, a relatively clear area surrounding one of the bacterial colonies was observed. The orange-pigmented bacteria had apparently produced an antimicrobial agent known as an antibiotic which Inhibited the growth of other microorganisms. It plays an important role in regulating the microbial population of bottom sediment. The 3/l6-inch-diameter colony had produced a 5/l6-inch-wide clear area surrounding the colony. A few small yellow- pigmented bacterial colonies were not affected by the antibiotic substance and were growing inside the clear area. 12. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Muraoka, James S; Naval Civil Engineering Laboratory (Port Hueneme, Calif. ). Port Hueneme, Calif. : U. S. Naval Civil Engineering Laboratory
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