Nutrient use and methane emissions in growing beef fed different protein sources and a pasture-based diet.

This study investigated the effects of different protein sources on feed intake, nutrient, and energy utilization, growth performance, and enteric methane (CH4) emissions in growing beef cattle, also evaluated against a pasture-based diet. Thirty-two Holstein × Angus growing beef were allocated to four dietary treatments: a total mixed ration (TMR) including solvent-extracted soybean meal as the main protein source (SB; n = 8), TMR with local brewers' spent grains (BSG; n = 8), TMR with local field beans (BNS; n = 8), and a diet consisting solely of fresh-cut Italian ryegrass (GRA; n = 8). Every four weeks, animals were moved to digestibility stalls within respiration chambers to measure nutrient intakes, energy and nitrogen (N) utilization, and enteric CH4 emissions.

Feed additives for methane mitigation: Regulatory frameworks and scientific evidence requirements for the authorization of feed additives to mitigate ruminant methane emissions.

This article describes the regulatory and evidence requirements necessary for the authorization of antimethanogenic feed additives (AMFA) aimed at mitigating enteric methane (CH) emissions from ruminants. It outlines the legislation and legal procedures in Australia, Canada, the European Union, New Zealand, South Korea, the United Kingdom, and the United States as illustrative examples, offering insights for applicants seeking authorization. Additionals objectives are to highlight consequential similarities and differences in regulations and evidence requirements and offer recommendations for scientists and applicants.

Sustainable utilization of fruit and vegetable waste bioresources for bioplastics production.

Nowadays, rapidly increasing production, use and disposable of plastic products has become one of the utmost environmental issues. Our current circumstances in which the food supply chain is demonstrated as containing plastic particles and other plastic-based impurities, represents a significant health risk to humans, animals, and environmental alike. According to this point of view, biodegradable plastic material aims to produce a more sustainable and greener world with a lower ecological impact.

The mediating role of social support between HIV stigma and sexual orientation-based medical mistrust among newly HIV-diagnosed gay, bisexual, and other men who have sex with men.

HIV-related stigma and medical mistrust are significant challenges to addressing HIV inequities among gay, bisexual, and other men who have sex with men (MSM). HIV-related stigma is associated with high levels of medical mistrust, but there is limited knowledge regarding the mechanisms that link these variables. We examined the potential mediating roles of social support and coping in the relationship between perceived HIV stigma and sexual orientation based-medical mistrust among newly HIV-diagnosed MSM.