. The Composition of sea-water : comparative and descriptive oceanography. Seawater -- Composition. 228 BELSER [CHAP. 9 directly involved in the filtering rate in oysters, and Loomis (1955) showed that glutathione triggers a feeding response in hydra. It seems quite reasonable that all of these compounds might be bioassayed in the future. The basis for description of genus and species in bacteria resides in differential utilization of carbohydrates. Why should it not be possible to apply a spectrum of bacteria with different carbohydrate patterns to sea-water in order to characterize the carbo
. The Composition of sea-water : comparative and descriptive oceanography. Seawater -- Composition. 228 BELSER [CHAP. 9 directly involved in the filtering rate in oysters, and Loomis (1955) showed that glutathione triggers a feeding response in hydra. It seems quite reasonable that all of these compounds might be bioassayed in the future. The basis for description of genus and species in bacteria resides in differential utilization of carbohydrates. Why should it not be possible to apply a spectrum of bacteria with different carbohydrate patterns to sea-water in order to characterize the carbohydrate components of the organic material ? 122 W 121 W 33 N SHIPS TRACK WATER MASS BOUNDARY-ANIMAL INDICATOR SPECIES INFERRED BOUNDARY-ANIMAL INDICATOR SPECIES STATIONS BIOASSAYED STATIONS NOT BIOASSAYED ,"' 32°20'N. Fig. 1. Plot of Zig Pac cruise data showing water-mass boundaries as defined by animal indicator species. At the stations where bioassays were run, the results appear below the station. + denotes presence and — denotes absence of specific biochemicals. The number indicates depth of sample in meters, and the biochemicals are reported in the order: isoleucine, glycine, tryptophane, uracil and peptone. The animal indicator data are from unpublished work of L. Berner. The mutant isolation program with Serratia has produced five separate mutants which respond to unidentified components of peptone, but to none of the single amino acids. It is suspected that they cannot synthesize short chain peptides, and efforts are being made to identify their requirements. Since glutathione is a tri-peptide, it seems reasonable to suppose that one might be able in the future to have a specific assay for this compound. Vishniac (1955) has devised an assay for steroids using Labyrinthula. This might perhaps open a whole new area of bioassay for more complex substances in sea-water, including the steroid vitamin Please note that these images are extracted from scanned page
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