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32937 documents, page 1 of 3294

Intracellular Electrogram of Embryonic Chick Heart

1. Electrograms of the exposed heart of chick embryo which was incubated for 54~96 hours, were recorded with the microelectrode technique. Embryo of 7 days' incubation and young chick 2 days after hatching served as the control. 2. The slow diastolic depolarization which has been accepted as the characteristic feature of the pacemaker cell in other vertebrate hearts, could ne recorded from the ventricle, atrium or sinus-area. Other features such as systolic depolarization were also observed i...

Beregening en late stikstofoverbemesting bij tulpen in 1963

In 1963 werden op het proefterrein 'Sinderhoeve' de beregeningsproeven met tulpen voortgezet. Daar de beregening werd uitgevoerd met verrijdbare sproeibomen konden veel proefveldjes worden aangelegd op een betrekkelijk klein perceel. Het ras 'Rose Copland' werd vervangen door 'Kleurenpracht', omdat dit ras minder gevoelig zou zijn voor het springen van de bolhuid. In de proefopzet werden vier vochttrappen met twee tijdstippen van stikstoftoediening opgenomen.