The present research is on a milky sap obtained from the Antiaris toxicaria tree (Moraceae) which is called Upas or Ipoh in Indonesia. The crude sap was administered to anesthetized rats, and changes in electrocardiogram (ECG) and systemic blood pressure was observed. Biologically and pharmacologically active components were extracted from the crude sap by means of water-acetone solution. Based on the strength of chemical qualitative detection tests of the sap extract (SE), cardiac glycosides are supposed to be the main components. The SE inhibited the Na+-, K+-ATPase (EC 3.6.1.3) which was partially purified from guinea pig heart muscle. When the SE and, concurrently, authentic ouabain were applied to isolated frog heart muscles, the fall of twitch tension was observed after the increased tension on mechanograms. These facts suggest that the main components of the milky sap are cardiac glycosides, and glycosides affect Na+, K+-ATPase activity of muscle membrane and heart muscle contraction.
This study provides much-needed empirical study of workplace inclusion of underresourced employees of low socioeconomic status. Based upon a conservation of resources perspective, we have examined the centrality of resources as a key inclusion process for well-being outcomes for employees with insufficient resources. In the context of misuse of institutional power over operative workers within highly segmented and hierarchical work settings, this study validates the importance of economic inclusion for fostering workers' well-being via fair employment practices. This study also offers new knowledge of the integrative resource model of workplace inclusion research by validating workers' personal resources of learning orientation as an internal condition for strengthening the positive effect of economic inclusion on well-being.