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Equations are given that relate the structure of spirally wrapped elastomeric-fibre core yams to their stretch properties. The model employed improves upon previous ones by considering the effect of covering-yarn diameter. Graphs are given that facilitate the use of the theory for manufacturing purposes. A comparison with available experimental data indicates an improved agreement between actual and predicted values of retraction in the most important case, where the input and output yam lengths are measured. It is expected that the improved theory given here will show to much greater advantage with the present commercial fine-core wrapped structures. In the special case where the wrapping or covering yarns have very low twist, the basic theory is inadequate. Modifications to account for compression of the cover yam are accordingly included to enable an approximate relationship between yam structure and stretch to be obtained in this case. [ABSTRACT FROM AUTHOR]

The article focuses on histochemical research on hemoglobin. In this study hyaline bodies found within 12 radicular odontogenic cysts were examined. Specimens were fixed in 10 percent neutral buffered formalin and embedded in paraffin. Information on the methods used for the stains and histochemical reactions for hemoglobin is provided.