The influence of anterior pituitary hormones on the gastrointestinal tract of humans and animals has been reported. Hypophysectomy (HYPOX) in the rat causes atrophy of the intestinal mucosa, reduction of gastric secretion and intestinal absorption, and increased susceptibility to infections. To our knowledge, there are no studies on the humoral immune response of the gut-associated lymphoid tis...

1. Neutral glycosphingolipids of hamster fibroblast NIL cells have been characterized as follows: glucosylceramide, lactosylceramide (betaGall yields 4Glc yields Cer), a digalactosylceramide (alphaGall yields 4betaGal yields Cer), a trihexosylceramide (alphaGall yields 4betaGall yields 4Glc yields Cer), two kinds of ceramide tetrasaccharides (A: alphaGa1NAcl yields 3betaGalNAcl yields 3alphaGal...

In this paper we identify the “nil-terms” for Waldhausen’s algebraic K-theory of spaces functor as the reduced K-theory of a category of equivariant spaces equipped with a homotopically nilpotent endomorphism.

We study subgroups Γ in Aff(N) = N ⋊ Aut(N) acting properly discontinuously and cocompactly on N . Here N is a simply connected, connected real nilpotent Lie group of finite dimension n. This situation is a natural generalization of the so-called affine crystallographic groups. We prove that for all dimensions 1 ≤ n ≤ 5 the generalized Auslander conjecture holds, i.e., that such subgroups are v...

BACKGROUND Angiogenesis plays an important role in maintaining adequate oxygen delivery, and nitric oxide (NO) is a potential regulator of angiogenesis. NO is synthesized through three isoforms of NO synthase (NOS). It is hypothesized that the NO derived from inducible NOS (iNOS) may promote survival of ischemic tissue through angiogenesis. To test this hypothesis, we investigated the effect of...

Introgressive hybridization has played a crucial role in crop breeding. Powdery mildew-resistant gene 21 (Pm21), located on the short arm of chromosome 6V of Haynaldia villosa (H. villosa), is typically a representative element which is transferred to hexaploid wheat through introgressive hybridization. Determination of sequence evidence for H. villosa DNA introgression would help trace Pm21 in...

The Knuth-Bendix completion procedure was introduced as a means of deriving canonical term-rewriting systems to serve as deci­ sion procedures for given equational theories. The procedure gen­ erates new rewrite rules to resolve ambiguities resulting from exist­ ing rules that overlap. We propose using this procedure to syn­ thesize logic programs, as well as functional programs, from specifica...

Air exhibiting very low concentrations of light-scattering aerosol particles is occasionally observed even in industrialized regions. Evidence is presented that this very clean air results from highly efficient removal of aerosol particles coupled to the removal of water in precipitation.

Symbol Name N = (nil) stoichiometric matrix W = (wli) regulation matrix s = (si) vector of stationary metabolite concentrations j = (jl) vector of stationary fluxes vl(·) kinetic law of reaction l k i energy constant for metabolite i k l velocity constant for reaction l k li reactant constant for reaction l and metabolite i k li activation constant for reaction l and metabolite i k li inhibitio...