scholarly journals Studies on the Chemistry of the Living Bark of the Black Locust Tree in Relation to Frost Hardiness. IV. Effects of Ringing on Translocation, Protein Synthesis and the Development of Hardiness

1953 ◽  
Vol 28 (2) ◽  
pp. 177-200 ◽  
Author(s):  
D. Siminovitch ◽  
D. R. Briggs
Keyword(s):  
Protein Synthesis ◽  
Black Locust ◽  
Frost Hardiness

EVIDENCE FROM INCREASE IN RIBONUCLEIC ACID AND PROTEIN SYNTHESIS IN AUTUMN FOR INCREASE IN PROTOPLASM DURING THE FROST-HARDENING OF BLACK LOCUST BARK CELLS

1963 ◽  
Vol 41 (9) ◽  
pp. 1301-1308 ◽  
Author(s):  
D. Siminovitch
Keyword(s):  
Protein Synthesis ◽  
Physical Properties ◽  
Ribonucleic Acid ◽  
Black Locust ◽  
Water Soluble ◽  
Freezing Injury ◽  
Desoxyribonucleic Acid ◽  
Maximal Increase ◽  
Frost Hardening ◽  
Development Of Resistance

The changes occurring in the ribonucleic acid and desoxyribonucleic acid of the living bark cells of the black locust tree in autumn have been followed in relation to the increases which take place at the same time in the water-soluble proteins, rate of incorporation of glycine into protein, and frost resistance.An increase in the ribonucleic acid without a change in the desoxyribonucleic acid has been shown to occur and to precede the period of maximal increase in rate of incorporation of glycine into protein, net synthesis of protein, and increase in freezing resistance.Because the increase in proteins is closely associated with the development of resistance to freezing injury in the bark, it is suggested that this transformation of the protein synthetic capacities of the bark, and the augmentation of protoplasmic substance which results from it, is part of the seasonal processes of adaptation of the tree to freezing. It is suggested that, in this process of adaptation, the function of the augmentation of the protoplasm is to so change the physical properties of the cell protoplasm as to enable it to withstand the effects of freezing.

The Effects of Dehydration-Rehydration Cycles on Protein Synthesis of Black Locust Seedlings

1977 ◽  
Vol 40 (1) ◽  
pp. 1-5 ◽  
Author(s):  
JAMES R. BRANDLE ◽  
THOMAS M. HINCKLEY ◽  
GREGORY N. BROWN
Keyword(s):  
Protein Synthesis ◽  
Black Locust

Homochirality as the Signature of Extra-Terrestrial Life

1997 ◽  
Vol 161 ◽  
pp. 505-510
Author(s):  
Alexandra J. MacDermott ◽  
Laurence D. Barron ◽  
Andrè Brack ◽  
Thomas Buhse ◽  
John R. Cronin ◽  
...  
Keyword(s):  
Amino Acids ◽  
Protein Synthesis ◽  
Optical Rotation ◽  
Physical Origin ◽  
Natural Choice ◽  
Rosetta Mission ◽  
Terrestrial Life ◽  
Subsurface Layers ◽  
Solar System Bodies ◽  
Origin Of Homochirality

AbstractThe most characteristic hallmark of life is its homochirality: all biomolecules are usually of one hand, e.g. on Earth life uses only L-amino acids for protein synthesis and not their D mirror images. We therefore suggest that a search for extra-terrestrial life can be approached as a Search for Extra- Terrestrial Homochirality (SETH). The natural choice for a SETH instrument is optical rotation, and we describe a novel miniaturized space polarimeter, called the SETH Cigar, which could be used to detect optical rotation as the homochiral signature of life on other planets. Moving parts are avoided by replacing the normal rotating polarizer by multiple fixed polarizers at different angles as in the eye of the bee. We believe that homochirality may be found in the subsurface layers on Mars as a relic of extinct life, and on other solar system bodies as a sign of advanced pre-biotic chemistry. We discuss the chiral GC-MS planned for the Roland lander of the Rosetta mission to a comet and conclude with theories of the physical origin of homochirality.

Lymphocyte activity and protein synthesis

2001 ◽  
Vol 101 (6) ◽  
pp. 591
Author(s):  
DEREK C. MACALLAN
Keyword(s):  
Protein Synthesis ◽  
Lymphocyte Activity
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