Modular comparison of untargeted metabolomics processing steps.

Background: Untargeted metabolomics requires robust and reliable strategies for data processing to extract relevant information form the underlying raw data. Multiple platforms for data processing are available, but the choice of software tool can have an impact on the analysis. This study provides a comprehensive evaluation of four workflows based on commonly used metabolomics software tools: XCMS, Compound Discoverer, MS-DIAL, and MZmine.

An In Vitro Nutritional Evaluation of Mixed Silages of Drought-Impaired Grass and Sugar Beet Pulp With or Without Silage Inoculants.

Increasing droughts adversely affect grasslands, diminishing the availability and quality of forages for ruminants. We have recently shown that mixed ensiling of drought-impaired grass (DIG) with sugar beet pulp (SBP) improved the conservation and feed value of silage. The application of silage additives may further improve the ruminal degradability, which may thereby shape the fermentation and microbiome in the rumen when those silages are tested as part of dairy diets.

Differences in severity of reticulo-rumen pH drop in primiparous Holstein cows fed the same diet during transition and early lactation: effects on performance, energy balance, blood metabolites, and reproduction.

We recently reported factors leading to different severity of ruminal pH drop in primiparous cows fed the same diet during transition and early lactation. The present study evaluates the effects of those severities on performance and several blood and balance parameters in the same 24 primiparous cows from 3 wk before calving until wk 10 in lactation. Dietary concentrate was increased for all cows from 32 before calving to 60% (DM basis) over the first wk in lactation, resulting in a diet with 40% non-fiber carbohydrates (NFC), and 14.

Site Matters: Differences in Gene Expression Profiles Along the Bovine Rumen Papilla During Subacute Rumen Acidosis.

Subacute rumen acidosis (SARA) is a significant concern in dairy cattle fed grain-rich diets. To elucidate the underlying pathophysiological mechanisms, ruminal papilla biopsies are often used. This study aimed to assess how the sampling site along the ruminal papilla influences gene expression profiles in rumen epithelium during SARA.

Impact of a two-stage rumen cannulation on the health and rumen function of six lactating dairy cows.

Objective: To determine the impact of a two-stage rumen cannulation on the health and rumen function of lactating dairy cows.

Study Design: Experimental study.

Animals: Six lactating Holstein cows.