57 research outputs found
Noncrossing partitions of an annulus
The noncrossing partition poset associated to a Coxeter group and Coxeter
element is the interval in the absolute order on . We
construct a new model of noncrossing partititions for of classical affine
type, using planar diagrams (affine types and in this
paper and affine types and in the sequel). The model in
type consists of noncrossing partitions of an annulus. In type
, the model consists of symmetric noncrossing partitions of an
annulus or noncrossing partitions of a disk with two orbifold points. Following
the lead of McCammond and Sulway, we complete to a lattice by
factoring the translations in , but the combinatorics of the planar
diagrams leads us to make different choices about how to factor.Comment: 45 pages, 11 figures. Version 2: Minor changes in connection with a
revision of arXiv:2212.1379
Acid-insoluble ash is a better indigestible marker than chromic oxide to measure apparent total tract digestibility in pigs
The aim of this study was to determine the apparent total tract digestibility (ATTD) of nutrients in cottonseed meal (CSM) and soybean meal (SBM) in simple carbohydrate and more complex wheat-based diets using 2 indigestible markers and total faecal collection. Twenty-five Large White × Landrace boars (57.8 kg) were randomly allocated to either a pure wheat diet, 40% CSM or SBM in either a sugar-starch- (1:1) or wheat-based diet for 18 d. Acid-insoluble ash (AIA) and chromic oxide (Cr2O3) were included in all diets as indigestible markers. Diets were offered (1,800 g/d per pig) in 3 meals/d from d 1 to 11 and 8 meals/d from d 12 to 17. On d 9, the pigs were moved to individual metabolism cages to allow total faecal collection. On d 18, the pigs were fed hourly for 8 h. After the 8th meal, pigs were anaesthetized and digesta sampled from the terminal ileum and rectum before lethal injection. There were no differences between ATTD of nitrogen (N) determined using AIA as a marker and measured by total faecal collection. On the other hand, the ATTD of N of diets containing CSM in sugar-starch- or wheat-based diets and the pure wheat diet determined using Cr2O3 as a marker was less (−3.11%, −4.46% and −6.59%; P < 0.001) than that measured by total faecal collection. The ATTD of N determined using AIA as a marker was highly correlated with that measured using total faecal collection (P < 0.001; R2 = 0.95). Similarly, the ATTD of N determined using Cr2O3 as a marker was correlated with that measured using total faecal collection, although the correlation was not quite as strong as using AIA (P < 0.001; R2 = 0.87). Also, the slope of the regression line and the intercept were closer to unity and zero for the relationship when the ATTD of N was determined using AIA compared to Cr2O3 as an indigestible marker. The ATTD of organic and dry matter behaved similarly. These data demonstrate that the basal diet and choice of indigestible marker can substantially influence the ATTD and that the use of AIA as an indigestible marker is more suitable than Cr2O3 in digestibility studies in pigs
Short-term exposure to heat stress attenuates appetite and intestinal integrity in growing pigs1
ChemInform Abstract: Regioselective Conjugate Reduction and Reductive Silylation of α,β-Unsaturated Aldehydes Using ((Ph3P)CuH)6.
ChemInform Abstract: Simplified, “One-Pot” Procedure for the Synthesis of ((Ph3P)CuH)6 (IV), a Stable Copper Hydride for Conjugate Reductions.
Mean electromotive force due to magnetoconvection in a rotating horizontal layer with rigid boundaries
Übergangsmetall-Silyl-Komplexe, 5211[1]. Bildung von Kupfer-Silyl- und -Stannyl-Komplexen durch Umsetzung von [Ph3PCuH]6 mit HER3 (E = Si, Sn)
Kinetische Racematspaltung von chiralen sekundären Alkoholen durch dehydrierende Kupplung mit zurückgewinnbaren, siliciumstereogenen Silanen
Organosilicon-Assisted Transformation of Living Anionic into Living Cationic Polymerization
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