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Photoreduction of O2 Primes and Replaces CO2 Assimilation
A mass spectrometer with a membrane inlet system was used to monitor directly gaseous components in a suspension of algae. Using labeled oxygen, we observed that during the first 20 seconds ofExpand
Algal Diversity and Commercial Algal Products New and valuable products from diverse algae may soon increase the already large market for algal products
The characteristics and classification of algae are reviewed, finding that they share many obvious characteristics with higher (land) plants, whereas their distinguishing features from other plant groups are varied and more subtle. Expand
Photoreduction of O(2) Primes and Replaces CO(2) Assimilation.
It is concluded that O( 2) and CO(2) are in direct competition for photosynthetically generated reducing power, with O(2)'s being the main electron acceptor during the induction process and under other conditions in which CO(1) reduction cannot keep pace with O (2) evolution. Expand
Metabolism of biphenyl by Aspergillus toxicarius: induction of hydroxylating activity and accumulation of water-soluble conjugates
The sulfotransferase activity appeared to be induced by the products of biphenyl metabolism, and water-soluble conjugates of 4-hydroxybiphenyl and 4,4'-dihydroxybIPhenyl were found in cultures of A. toxicarius grown in the presence of bipenyl plus inducer. Expand
Isotopic composition of photosynthetic O2 flash yields in the presence of H2 18O and HC18O− 3
We described a mass spectrometer-inlet system for measuring the amount and isotopic composition of gases evolved and consumed by photosynthetic tissue in response to single short saturating lightExpand
Light-driven Uptake of Oxygen, Carbon Dioxide, and Bicarbonate by the Green Alga Scenedesmus.
It is concluded that the carbon cycle-independent reduction of O(2) occurs at the expense of photosystem I-generated reducing equivalents and the observed kinetics in air-grown and CO(2)-grown algae in the presence and absence of carbonic anhydrase support the idea that air-adapted algae are able to assimilate HCO(3) (-) actively at a high rate. Expand
Photosynthesis: Limited Yields, Unlimited Dreams
In the dark "synthetic" reactions, CO2 is taken up from the atmosphere and reduced at the expense of the light-generated NADPH and ADP. Expand
Photoactivation of the manganese catalyst of 0 2 evolution II. A two-guantum mechanism.
Kinetic experiments described in a previous communication suggested that photoactivation of the photosynthetic O 2 -evolving site is a multi-quantum process but the results obtained from the computer simulation of the derived kinetic model compare favorably with the experimentally derived values. Expand
Problems associated with the utilization of algae in bioregenerative life support systems
The workshop identified the following major areas to be addressed by space flight experimentation: (1) long term culture stability, (2) optimal design of algal growth reactors, and (3) post growth harvesting and processing in the space environment. Expand
(Minus) S-adenosyl-L-methionine-magnesium protoporphyrin methyltransferase, an enzyme in the biosynthetic pathway of chlorophyll in Zea mays.
The enzyme (-) S-adenosyl-L-methionine-magnesium protoporphyrin methyltransferase, which catalyzes the transfer of the methyl group from (-) to (-) magnesium protopoiryrin to form magnesium protiporphyr in monomethyl ester, has been detected in chloroplasts isolated from Zea mays. Expand