Accession Number : ADA210692


Title :   Physiological Requirements for the Production of the Biopolymer Elsinan by Species of Elsinoe


Descriptive Note : Final rept. Jan 1987-Oct 1988


Corporate Author : ARMY NATICK RESEARCH DEVELOPMENT AND ENGINEERING CENTER MA


Personal Author(s) : Wiley, B J ; Arcidiacono, S M ; Ball, D H ; Mayer, J M ; Kaplan, D L


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a210692.pdf


Report Date : Jun 1989


Pagination or Media Count : 35


Abstract : In order to determine optimum environmental conditions for t he production of elsinan, the following parameters were evaluated: culture conditions, growth medium, incubation period, ph, and sources and amounts of carbon, nitrogen, and phosphate. A medium was devised for the optimum yields of high (2 million), medium (1-2 million), and low (1 million) weight average molecular weight biopolymer products. Batch systems, scale-up batch, and continuous fermentations of one liter and 10 liters were also evaluated, as were processing conditions. Elsinan biopolymer products with weight average molecular weights from less than 500 thousand to over 2 million, with a dispersity of around two were produced. The chemical properties of these fractions were evaluated, but films and fibers were too brittle for physical analysis.


Descriptors :   *REQUIREMENTS , BATCH PROCESSING , BIOSYNTHESIS , CARBON , CHEMICAL PROPERTIES , CULTURE MEDIA , CULTURES(BIOLOGY) , FERMENTATION , FUNGI , GROWTH(GENERAL) , INCUBATION , MOLECULAR WEIGHT , NITROGEN , OPTIMIZATION , PHOSPHATES , PHYSICAL PROPERTIES , PHYSIOLOGY , POLYSACCHARIDES , PROCESSING , PRODUCTION , TIME , YIELD


Subject Categories : Biology
      Test Facilities, Equipment and Methods


Distribution Statement : APPROVED FOR PUBLIC RELEASE