Variation in the response to light in Amoeba proteus with special reference to the effects of salts and hydrogen-ion concentration

PROTOPLASMA ◽  
1930 ◽  
Vol 11 (1) ◽  
pp. 412-431 ◽  
Author(s):  
S. O. Mast ◽  
H. R. Hulpieu
Keyword(s):  
Special Reference ◽  
Amoeba Proteus ◽  
Hydrogen Ion ◽  
Ion Concentration ◽  
Hydrogen Ion Concentration

scholarly journals CHEMICAL CHANGES OF THE PAPAYA PLANT DURING DEVELOPMENT, WITH SPECIAL REFERENCE TO ITS PROTEOLYTIC ACTIVITY

1969 ◽  
Vol 27 (1) ◽  
pp. 1-15
Author(s):  
C. F. Asenjo ◽  
D. H. Cook ◽  
M. del C. De Fernández ◽  
L. A. Alvarez
Keyword(s):  
Special Reference ◽  
Proteolytic Activity ◽  
Maximum Activity ◽  
Hydrogen Ion ◽  
Ion Concentration ◽  
Fruit Pulp ◽  
Hydrogen Ion Concentration ◽  
Milk Clotting ◽  
Green Fruit ◽  
Milk Clotting Activity

1. All parts of the papaya plant, with the exception of the seed, showed varying degrees of proteolytic activity. 2. Milk clotting activity appeared first in the leaf and later, in the stem and root. 3. The largest amount of proteolytic activity was concentrated in the green fruit rind and, in decreasing quantities, in the leaf, fruit pulp, stem, and root. 4. In the leaf and, to a lesser extent, in the stem and root, a definite variation took place in proteolytic activity during the thirteen initial months of growth. Maximum activity was reached between the fourth and ninth months. 5. Data have been collected regarding the moisture, hydrogen ion concentration, and nitrogen content of the various parts of the papaya plant during its initial thirteen months of growth.

Memoirs: Amoeba Proteus: Some New Observations on its Nucleus, Life-history, and Culture

1924 ◽  
Vol s2-69 (273) ◽  
pp. 119-149
Author(s):  
MONICA TAYLOR
Keyword(s):  
Life History ◽  
Amoeba Proteus ◽  
Hydrogen Ion ◽  
Ion Concentration ◽  
Hatching Rate ◽  
Hydrogen Ion Concentration ◽  
Additional Detail ◽  
Laboratory Cultures ◽  
History Of ◽  
Chromatin Material

1. Additional detail of the minute structure of the nucleus of A. proteus has been given. 2. It has been shown that growth in the size of the nucleus and fission division of the nucleus are consequent upon a previous division of chromatin material situated in the blocks. 3. This division of the chromatin blocks has been described. 4. The history of tbe formation and development of the young Amoebae, encystment, hatching, rate of growth has been traced out. 5. Some recent modifications in the methods of making laboratory cultures of A. proteus have been recorded. 6. Amoeba culture in relation to hydrogen-ion concentration has been discussed.

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