Douglas J. Cork

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Chlorobium limicola forma thiosulfatophilum (ATCC 17092) was grown in a 1-liter continuously stirred tank reactor (800-ml liquid volume) at pH 6.8, 30 degrees C, saturated light intensity, and a gas flow rate of 23.6 ml/min from a gas cylinder blend consisting of 3.9 mol% H(2)S, 9.2 mol% CO(2), 86.4 mol% N(2), and 0.5 mol% H(2). This is the first(More)
Human beings find it difficult to analyze local and global oligonucleotide patterns in the linear primary sequences of a genome. In this paper, we present a family of iterated function systems (IFS) that can be used to generate a set of visual models of a DNA sequence. A new visualization function, the W-curve, that is derived from this IFS family is(More)
The effect of light intensity, surface area of illuminated bioreactor, H2S flow rate and various wavelength regions of light on oxidative sulfur metabolism byChlorobium was examined. The regulation of oxidative sulfur metabolism by light intensity led to the determination of the photobioreaction quantum efficiency (PQE) for this system. This efficiency is(More)
A metered blend of anaerobic-grade N(2), CO(2), and H(2)S gases was introduced into an illuminated, 800-ml liquid volume, continuously stirred tank reactor. The system, described as an anaerobic gas-to-liquid phase fed-batch reactor, was used to investigate the effects of H(2)S flow rate and light energy on the accumulation of oxidized sulfur compounds(More)
An Apple IIe microcomputer with an Isaac analog-digital package has been interfaced to Tylan proportionating mass flow gas controllers to regulate three substrate gases which are introduced into an anaerobic bioreactor. Advantages of the system include: straightforward interfacing and programming, accurate monitoring and controlling, and advanced real time(More)
A strain ofFlavobacterium breve capable of utilizing 3,5-dichlorosalicylate as a sole source of carbon and energy was identified. Degradation of 3,5-dichlorosolicylate, was specific as this strain did not metabolize dicamba (3,6-dichloro-2-methoxybenzoic acid), 3,5-dicamba (3,5-dichloros2-methoxybenzoic acid), or 3,6-dichlorosalicylate. The organism was(More)