𝔖 Bobbio Scriptorium
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The Relation Between Adenosine Triphosphate and Microbial Biomass in Diverse Aquatic Ecosystems

✍ Scribed by Dr. Hans W. Paerl; Dr. Noel J. Williams

Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
436 KB
Volume
61
Category
Article
ISSN
1434-2944

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✦ Synopsis

Abstract

By using autoradiographic examination of ^14^C labeled viable cells, natural phytoplankton communities were separated into living and non‐living components. Comparisons of carbon to adenosine triphosphate (ATP) content of living cells yielded consistent ratios with depth, during periods of high and low nutrient supply at Lake Tahoe. Over time the ratio fluctuated by no more than ± 17% of the mean between the time of maximum nutrient supplies and nutrient depletion. The viability of specific phytoplankton groups was surprisingly low at times, indicating that conventional counting methods tend to overestimate live biomass. A survey of lakes differing in trophic states and having diverse phytoplankton and bacterial assemblages has shown that ATP measurements can be used as an accurate measure of total living microbial biomass.

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On the Position of the Intramolecular Equilibrium between Opened and Aromatic-Ring Stacked Forms in Ternary Complexes Composed of Adenosine 5′-triphosphate, Mg2+ or Zn2+, and L-Tryptophanate, and in Related Ternary Systems
✍ Paul R. Mitchell; Bernard Prijs; Helmut Sigel 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 German ⚖ 711 KB

## Abstract The intramolecular and dimensionless equilibrium constant, __K__′, for the equilibrium between open and aromatic‐ring stacked isomers of ternary complexes formed between adenosine 5′‐triphosphate, inosine 5′‐triphosphate, or uridine 5′‐triphosphate, Mg^2+^ or Zn^2+^, and L‐tryptophanate