scholarly journals Conducting Drug Abuse Investigations in Natural Environments: Potential Directions for Medical Toxicology Research

2010 ◽  
Vol 6 (1) ◽  
pp. 56-62 ◽  
Author(s):  
Edward W. Boyer ◽  
Richard J. Fay ◽  
Aaron Cook ◽  
Martin Buckosh ◽  
Patricia L. Hibberd ◽  
...  
2013 ◽  
Vol 44 (5) ◽  
pp. 1055
Author(s):  
Edward J. Otten

2013 ◽  
Vol 55 (5) ◽  
pp. 593
Author(s):  
Joseph J. Mignogna ◽  
Michael G. Holland

Author(s):  
L. P. Hardie ◽  
D. L. Balkwill ◽  
S. E. Stevens

Agmenellum quadruplicatum is a unicellular, non-nitrogen-fixing, marine cyanobacterium (blue-green alga). The ultrastructure of this organism, when grown in the laboratory with all necessary nutrients, has been characterized thoroughly. In contrast, little is known of its ultrastructure in the specific nutrient-limiting conditions typical of its natural habitat. Iron is one of the nutrients likely to limit this organism in such natural environments. It is also of great importance metabolically, being required for both photosynthesis and assimilation of nitrate. The purpose of this study was to assess the effects (if any) of iron limitation on the ultrastructure of A. quadruplicatum. It was part of a broader endeavor to elucidate the ultrastructure of cyanobacteria in natural systemsActively growing cells were placed in a growth medium containing 1% of its usual iron. The cultures were then sampled periodically for 10 days and prepared for thin sectioning TEM to assess the effects of iron limitation.


2006 ◽  
Vol 40 (10) ◽  
pp. 28
Author(s):  
JOHN R. BELL
Keyword(s):  

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