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The ether-soluble resin of the latex of Euphorbia kamerunica was separated into a non-polar and Nike Roshe Uk 4 a polar fraction by gradient elution column chromatography. From the non-polar fraction three macrocyclic diterpene esters were isolated by adsorption and partition preparative TLC methods. These compounds were identified as 3,7,8-triacetyl-ingol-12-tigliate,3,7-diacetyl-ingol-12-tigliate and ingol-tetra-acetate by means of spectroscopic data, together with hydrolysis and partial synthesis.
We integrate the constitutive equation of the Phan-Thien-Tanner (PTT) fluid near a re-entrant Nike Air Presto For Sale 270° corner. The velocity field is assumed given (Newtonian). In contrast to the case of the upper convected Maxwell (UCM) fluid, we find the following features: (1) The elastic stresses near the corner are less singular than Newtonian stresses; (2) Boundary layers near the walls are much less sharp than for the UCM fluid; (3) There are no spurious stresses due to downstream instabilities.
Sixty-four Santa Gertrudis field-breeding bulls were subjected to three series of modified Osborne-type sexual behavior tests in which one bull was exposed to one restrained stimulus cow in a small pen for 10 min. The individual stimulus cow was found to be a significant factor in copulatory, but not pre-copulatory, response of bulls. Within one series, a specific identified effect was that pre-ovulatory cows elicited significantly greater copulatory response than post-ovulatory cows.