scholarly journals Substrate and electron donor limitation induce phenotypic heterogeneity in different metabolic activities in a green sulphur bacterium

2018 ◽  
Vol 10 (2) ◽  
pp. 179-183 ◽  
Author(s):  
M. Zimmermann ◽  
S. Escrig ◽  
G. Lavik ◽  
M. M. M. Kuypers ◽  
A. Meibom ◽  
...  
Keyword(s):  
Electron Donor ◽  
Phenotypic Heterogeneity ◽  
Green Sulphur Bacterium ◽  
Green Sulphur ◽  
Metabolic Activities

13C Photo-CIDNP MAS NMR on the Reaction Center of Green Sulphur Bacterium at Two Different Magnetic Fields

2008 ◽  
pp. 173-176 ◽  
Author(s):  
Esha Roy ◽  
A. Alia ◽  
Peter Gast ◽  
Hans J. van Gorkom ◽  
Gunnar Jeschke ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Reaction Center ◽  
Mas Nmr ◽  
Green Sulphur Bacterium ◽  
Green Sulphur

Reduction of spermatogonia and testosterone in rat testes flown on space lab-3

1986 ◽  
Vol 44 ◽  
pp. 248-249
Author(s):  
Delbert E. Philpott ◽  
W. Sapp ◽  
C. Williams ◽  
T. Fast ◽  
J. Stevenson ◽  
...  
Keyword(s):  
Social Interaction ◽  
Social Status ◽  
Population Size ◽  
Physiological Response ◽  
Social Rank ◽  
Reproductive Function ◽  
Testicular Development ◽  
Organ Weights ◽  
Reproductive Maturation ◽  
Metabolic Activities

Space Lab 3 (SL-3) was flown on Shuttle Challenger providing an opportunity to measure the effect of spaceflight on rat testes. Cannon developed the idea that organisms react to unfavorable conditions with highly integrated metabolic activities. Selye summarized the manifestations of physiological response to nonspecific stress and he pointed out that atrophy of the gonads always occurred. Many papers have been published showing the effects of social interaction, crowding, peck order and confinement. Flickinger showed delayed testicular development in subordinate roosters influenced by group numbers, social rank and social status. Christian reported increasing population size in mice resulted in adrenal hypertrophy, inhibition of reproductive maturation and loss of reproductive function in adults. Sex organ weights also declined. Two male dogs were flown on Cosmos 110 for 22 days. Fedorova reported an increase of 30 to 70% atypical spermatozoa consisting of tail curling and/or the absence of a tail.

Artificial cells containing sustainable energy conversion engines

2019 ◽  
Vol 3 (5) ◽  
pp. 573-578 ◽  
Author(s):  
Kwanwoo Shin
Keyword(s):  
Energy Conversion ◽  
Nicotinamide Adenine Dinucleotide ◽  
Sustainable Energy ◽  
Living Cells ◽  
Energy Transduction ◽  
Artificial Cells ◽  
Energy Conversion Process ◽  
Metabolic Reactions ◽  
Metabolic Activities ◽  
Reduced Nicotinamide Adenine Dinucleotide

Living cells naturally maintain a variety of metabolic reactions via energy conversion mechanisms that are coupled to proton transfer across cell membranes, thereby producing energy-rich compounds. Until now, researchers have been unable to maintain continuous biochemical reactions in artificially engineered cells, mainly due to the lack of mechanisms that generate energy-rich resources, such as adenosine triphosphate (ATP) and reduced nicotinamide adenine dinucleotide (NADH). If these metabolic activities in artificial cells are to be sustained, reliable energy transduction strategies must be realized. In this perspective, this article discusses the development of an artificially engineered cell containing a sustainable energy conversion process.

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