THE CATALYTIC ACTIVITY OF THE DEVELOPING HEN'S EGG.

Area of Science:

• Biochemistry
• Developmental Biology

Background:

• Catalytic activity, particularly the decomposition of hydrogen peroxide, is crucial in biological systems.
• Understanding the developmental changes in catalytic activity can provide insights into tissue maturation and embryonic development.

Purpose of the Study:

• To investigate and compare the catalytic activity of various tissues in newly born and adult rabbits.
• To examine the development of catalytic activity within a hen's egg from fertilization through incubation.

Main Methods:

• Comparative analysis of catalytic power in rabbit blood, brain, muscle, kidneys, lungs, and liver.
• Assessing the catalytic activity of whole fresh eggs, individual egg components (germinal center, yolk, white), and incubated fertilized eggs.

Main Results:

• Rabbit blood, brain, and muscle showed similar catalytic activity regardless of age. Kidneys and lungs exhibited lower activity in newborns, increasing rapidly post-birth. The liver was more active in newborn rabbits.
• Fresh whole eggs possessed slight, constant catalytic activity. Individual egg parts showed negligible activity. Incubated fertilized eggs demonstrated rapidly increasing catalytic activity in the germinal portion, while other parts and amniotic fluid did not.

Conclusions:

• Tissue maturation in rabbits involves significant increases in kidney and lung catalytic activity shortly after birth.
• The developing germinal portion of a hen's egg is the primary source of its acquired catalytic activity, independent of external factors beyond incubation conditions.