M P Milanov

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In vitro experiments were carried out on muscle strips from different compartments of sheep complex stomach. The following conclusions were drawn: 1. In Ca2+-free medium containing EDTA (0.5 mM) proximal and antral abomasum preparations are mechanically inactive. The addition of BaCl2 (0.2-1 mM) induces phasic contractions in the rumen and antrum strips. In(More)
In the majority of experiments the ruminal preparations did not exhibit spontaneous electrical and contractile activity but showed a Ca-dependent spike-free myogenic tone. Ba2+ or Sr2+ evoked spike activity and phasic contractions and increased the muscle tonic tension. Tetraethylammonium (TEA) exerted no effect on the ruminal preparations but potentiated(More)
In vitro experiments have shown that PGF2 alpha or indomethacin produces different effects on muscle strips isolated from different compartments of sheep complex stomach. PGF2 alpha (10(-6) - 10(-5) M) increases the tone of the ruminal preparations and exerts a negligible effect on the reticulum and omasum strips. Indomethacin (5 X 10(-6) M) inhibits the(More)
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