Two new dehydrotriferulic acids and two dehydrotetraferulic acids were isolated from saponified maize bran insoluble fiber using size exclusion chromatography on Bio-Beads S-X3 followed by Sephadex LH-20 chromatography and semipreparative phenyl-hexyl reversed phase high-performance liquid chromatography. On the basis of UV spectroscopy, mass spectrometry, and one- and two-dimensional NMR exper...

Effects of 3 ionophores and 2 antibiotics on in vitro H(2)S production, IVDMD, total gas production, and VFA profile with or without added S were examined. In Exp. 1, ruminal fluid from 2 ruminally cannulated steers fed a steam-flaked corn-based diet (75% concentrate) without ionophore and antibiotics for 28 d before collection was used to inoculate in vitro cultures. Treatments were control (n...

Let G be a noncyclic group of order 4, and let K = Z, Z (2) and Z 2 be the ring of rational integers, the localization of Z at the prime 2 and the ring of 2-adic integers, respectively. We describe, up to conjugacy, all of the indecomposable subgroups in the group GL(m, K) which are isomorphic to G. The first explicit description of the Z-representations of the noncyclic group G of order 4 was ...

The FDA approved the ionophore monensin as feed additive for cattle in 1976, and within a few years most feedlot cattle in the United States were being fed this antibiotic (Russell and Strobel, 1989). Feed efficiency improvements as large as 10% were documented (Goodrich et al., 1984), and in vitro studies and in vivo incubations showed that monensin was altering ruminal fermentation (Dinius et...

The regulation of ion channels by phosphatidic acid (a proposed active metabolite in the phosphatidylinositol e f fec t ) was investigated using IH-NMR spectroscopy and smaJl unilamellar phospholipid vesicles. Transport across egg-yolk phosphatidylcholine (egg PC) and d i p a l m i t o y l phosphatidylcholine (DPPC) vesicular membranes in the presence of the channel-forming ionophores alamethic...

In this paper we prove that the noncyclic generic abelian crossed product p-algebras constructed by Amitsur and Saltman in [AS78] remain noncyclic after tensoring by any prime to p extension of their centers. We also prove that an example due to Saltman of an indecomposable generic abelian crossed product with exponent p and degree p 2 remains indecomposable after any prime to p extension. 0 In...

Polyether ionophores represent a large group of natural, biologically active substances produced by Streptomyces spp. They are lipid soluble and able to transport metal cations across cell membranes. Several of polyether ionophores are widely used as growth promoters in veterinary. Polyether antibiotics show a broad spectrum of bioactivity ranging from antibacterial, antifungal, antiparasitic, ...