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Statistics of the Velocity Field and Spatial Distribution of Hot Spots in Methanol Masers

ABSTRACT

We present the results of the first study of statistical properties of velocity field and spatial distribution of the observed “hot spots” in methanol maser sources with available interferometric maps. Three Class I sources [DR21(OH), NGC6334IN, and L379] and one Class II source [W3(OH)] were investigated. In the majority of the sources, both the velocity difference between the pairs of spots and the average number density of the neighbors to a spot are a ...More »

 

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[b]Figure 1.[/b] Acid and base consumption, cell mass, and bioactivity vs. time for S. tenjimariensis grown in a controlled batch bioreactor. Max dry cell weight was 5.78 g/L at 54 h.
Relationship Between Gene Expression and Cell Metabolism in the Marine Bacterium Streptomyces tenjimariensis

Abstract

The marine bacterium Streptomyces tenjimariensis is known to produce an array of primary and secondary metabolites. The mechanisms of genetic regulation and control of these metabolic production pathways have yet to be elucidated. In this study, two specific aspects of metabolism and gene expression in S. tenjimariensis were investigated: the expression of enzymes involved in the biosynthesis of aminoglycoside antibiotics and the extracellul ...More »
 
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JYI is supported by: The National Science Foundation, The Burroughs Wellcome Fund, Glaxo Wellcome Inc., Science Magazine, Science's Next Wave, Swarthmore College, Duke University, Georgetown University, and many others.
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