PHYSICAL PROPERTIES OF THE ALLANTOIC AND AMNIOTIC FLUIDS OF THE CHICK : I. SPECIFIC CONDUCTANCE
1Biological Laboratories, Harvard University, Cambridge.
The Journal of General Physiology
|October 30, 2009
Insights
Specific conductance of chick allantoic and amniotic fluids was measured during incubation. These measurements reveal how fluid composition changes impact ion and non-ion concentrations, crucial for understanding embryonic development.
Area of Science:
- Embryology
- Biochemistry
- Physiology
Background:
- The allantoic and amniotic fluids are critical for embryonic development in chick embryos.
- Understanding the physicochemical properties of these fluids is essential for assessing embryonic health.
Purpose of the Study:
- To determine the specific conductance of allantoic and amniotic fluids during chick embryonic development.
- To correlate changes in specific conductance with alterations in the chemical composition of these fluids.
- To elucidate the relationship between ionized and un-ionized substances within these extraembryonic fluids.
Main Methods:
- Measurement of specific conductance of allantoic and amniotic fluids.
- Analysis of fluid samples collected between the 7th and 19th days of incubation.
- Correlation analysis between conductance values and chemical composition data.
Main Results:
- Specific conductance of both fluids changes significantly during the observed incubation period.
- These conductance changes directly correspond to shifts in the concentration of various chemical components.
- The data highlights the dynamic balance of ionized and un-ionized materials in developing chick fluids.
Conclusions:
- Specific conductance serves as a valuable indicator of the chemical milieu within embryonic fluids.
- Changes in fluid composition, reflected by conductance, are integral to normal chick embryonic development.
- This study provides foundational data for further research into fluid-electrolyte balance in avian embryos.
Abstract:
1. The specific conductance of the allantoic and amniotic fluids of the developing chick has been determined over the period of incubation between the 7th and 19th days. 2. Changes in this property have been related to changes in the chemical composition of these two fluids. 3. These conductance values are of importance in that they show the relation between ionized and un-ionized materials present in the two fluids.
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