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A program P where no clause body contains a negative literal is called a definite program. In other words, if every clause in a program is a Horn clause, then it is a definite program. The least model of a definite logic program P can be computed as the least fixed point of the immediate consequence operator, TP of P defined as follows. Definition 1 Let M ⊆ P be a set of propositions. Then M ′ ...
Autotaxin (ATX) is a secreted glycoprotein that converts lysophosphatidylcholine (LPC) to the bioactive phospholipid lysophosphatidic acid (LPA) and is the major enzyme generating circulating LPA. Inhibition of LPA signaling has profound anti-fibrotic effects in multiple organ systems including the lung, kidney, skin and peritoneum. However, other LPA-generating pathways exist and the role of A...
In a long-term experiment on red-spotted dairy cows using the SCR Heatime HR-IR system, nature of rumination in animals was studied. The involved 10 cows, which were observed during year-round physiological cycle.Studies have shown that phase cycle is not significantly affected by term rumination. Rumination gradually increases after calving from 254 to 510 1 62 days lactation, and then stabili...
Introduction Phospholipases catalyse the cleavage of membrane phospholipids and thereby generate second messengers that participate in intracellular signal transduction processes or act as precursors of tissue hormones. Cytosolic phospholipase Az (cPLA2) is an 85 kDa enzyme that cleaves arachidonic acid at the sn-2 position of the phospholipid [1,2]. The intracellular location of the enzyme ena...
A new ascorbate-induced chloroplast absorbance change which has the characteristics of a carotenoid shift is described. The absorbance change was light-dependent at pH 7 but not at pH 5. The difference spectra for the light and dark changes were similar, showing a large absorbance peak at 505 nanometers, smaller peaks near 468 and 437 nanometers, and a sharp valley around 483 nanometers. The ab...
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