Degradation of spent craft brewer's yeast by caprine rumen hyper ammonia‐producing bacteria

Harlow, Brittany E.; Bryant, Robert W.; Cohen, Seth D.; O'Connell, Sean P.; Flythe, Michael D.

doi:10.1111/lam.12623

Cited by 22 publications

(19 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Other compounds derived from hops include α-and β-acids, which have a strong antimicrobial activity [78]. The α-acid content ranges between 167 and 2074 µg/g, with an average related to the total hop acid between 487 and 2557 µg/g.…”

Section: Brewing Technologymentioning

confidence: 99%

Exploitation of Brewing Industry Wastes to Produce Functional Ingredients

Fărcaș¹,

Socaci²,

Mudura³

et al. 2017

Brewing Technology

View full text Add to dashboard Cite

Nowadays, the consumers' global demand for healthier diets is steadily increasing, and the development of novel functional ingredients has become a focus of the food industry. On the other hand, the accumulation of huge amounts of food wastes every year has led to environmental degradation and especially to significant loss of valuable material that could otherwise be exploited as new health-promoting ingredients, fuels and a great variety of additives. In this respect, the biggest challenge of the current scientific world is to convert the underutilised by-products generated by the food and beverage industries into more profitable and marketable added value products which would also contribute significantly to meet the nowadays society needs. This chapter gives an overview regarding the possibility of exploiting the brewing industry wastes as sources of bioactive compounds in order to produce functional ingredients and products with added value.

show abstract

Section: Brewing Technologymentioning

confidence: 99%

Exploitation of Brewing Industry Wastes to Produce Functional Ingredients

Fărcaș¹,

Socaci²,

Mudura³

et al. 2017

Brewing Technology

View full text Add to dashboard Cite

show abstract

“…After arrival at the laboratory, rumen cell suspensions were prepared as previously described (Harlow et al, 2016). After arrival at the laboratory, rumen cell suspensions were prepared as previously described (Harlow et al, 2016).…”

Section: Rumen Cell Suspension Preparationmentioning

confidence: 99%

“…When rumen digesta were needed for the ex vivo experiment, samples (~0.5 kg) were collected from each steer individually and transported to the laboratory in an airtight, insulated container within 1 h of collection. After arrival at the laboratory, rumen cell suspensions were prepared as previously described (Harlow et al, 2016). Briefly, the rumen digesta samples were squeezed through muslin to remove large plant particles and were subjected to a low-speed centrifugation (100 ´ g, 10 min) to remove the smaller plant particles and protists (Sorvall RC-6; Thermo-Fisher Scientific, Waltham, MA).…”

Section: Rumen Cell Suspension Preparationmentioning

confidence: 99%

Biochanin A (an Isoflavone Produced by Red Clover) Promotes Weight Gain of Steers Grazed in Mixed Grass Pastures and Fed Dried‐Distillers’ Grains

et al. 2017

View full text Add to dashboard Cite

Biochanin A (BCA) is an isoflavone produced by red clover (Trifloium pratense L.) that can inhibit hyper‐ammonia‐producing bacteria (HAB) to reduce deamination in the rumen and increase the feed amino acids available for gastric digestion. An ex vivo experiment was conducted to evaluate the effect of dried distiller's grains (DDG) and BCA (30 μg mL−1) on HAB in bovine rumen fluid. Following a 24‐h incubation, HAB and ammonia concentrations in the media increased with addition of DDG. However, DDG fermentations with BCA had 100‐fold fewer HAB and 37% less ammonia than DDG‐only fermentations. A grazing experiment was conducted with crossbred steers grazing a mixture of predominately endophyte‐free tall fescue [Lolium arundinaceum (Schreb.) Darbysh], Kentucky bluegrass (Poa pratense L.), and orchardgrass (Dactylis glomerata L.) in the early and late growing season. Average daily gains (ADG) were compared among treatments of pasture‐only control, daily feeding of 1.4 kg DDG steer−1, and daily feeding of 1.4 kg DDG plus BCA (6.3 g steer−1, representing ∼30% red clover diet). Averaged over the early and late growing seasons, feeding DDG (0.83 ± 0.05 kg d−1) increased ADG by 15% over the pasture‐only treatment (0.72 ± 0.03 kg d−1), but addition of BCA to the DDG (0.93 ± 0.04 kg d−1) provided an additive increase in ADG of 29% over the control treatment. Results of the ex vivo and grazing experiments provide evidence that BCA inhibits HAB in the rumen and that the reduced deamination in the rumen can enhance weight gain performance of steers.

show abstract

“…There is interest in brewery ruminant co-products with high levels of hop phytochemicals. Some results have shown that spent brewers' yeast inhibited rumen ammonia and methane production [25] [26]. Another DOI: 10.4236/aim.2019.912063 990 Advances in Microbiology study indicates that older stored hops are adequately antimicrobial for feeding applications even after they are no longer desirable by brewers [27].…”

Section: Discussionmentioning

confidence: 99%

Effects of Hops (<i>Humulus lupulus</i> L.) Beta-Acids on Short Chain Fatty Acid Production from Complex Carbohydrates by Rumen Microbiota

Flythe¹,

Harlow²

2019

AiM

View full text Add to dashboard Cite

The aim of this experiment was to determine the effects of beta-acids, prenylated phenolic compounds from the hops plant, on fermentation of individual carbohydrates by rumen microorganisms. Mixed, uncultivated rumen microbiota was harvested from rumen fistulated steers and washed to make cell suspensions. The suspensions were used to inoculate media with a glucan, fructan or constituent sugar, and fermentation was evaluated by production of short-chain fatty acids (SCFA). Hops beta-acid (30 ppm) was not universally inhibitory, but each of the SCFA (acetate, propionate or butyrate) was decreased (P < 0.05) in one or more of each cellulose or starch tested. The fermentation of sugars and fructans (short-or long-chain inulins) was not impacted by the phytochemicals. Previous results have shown that hops and hops extracts had the beneficial effects of reducing rumen ammonia and methane. The current results indicate that both starch and cellulose fermentation could be impacted. Because cellulose fermentation is nutritionally important on forage-based diets, hops phytochemicals might have more utility in cereal grain-based rations.

show abstract

Degradation of spent craft brewer's yeast by caprine rumen hyper ammonia‐producing bacteria

Cited by 22 publications

References 19 publications

Exploitation of Brewing Industry Wastes to Produce Functional Ingredients

Exploitation of Brewing Industry Wastes to Produce Functional Ingredients

Biochanin A (an Isoflavone Produced by Red Clover) Promotes Weight Gain of Steers Grazed in Mixed Grass Pastures and Fed Dried‐Distillers’ Grains

Effects of Hops (<i>Humulus lupulus</i> L.) Beta-Acids on Short Chain Fatty Acid Production from Complex Carbohydrates by Rumen Microbiota

Contact Info

Product

Resources

About

Degradation of spent craft brewer's yeast by caprine rumen hyper ammonia‐producing bacteria

Cited by 22 publications

References 19 publications

Exploitation of Brewing Industry Wastes to Produce Functional Ingredients

Exploitation of Brewing Industry Wastes to Produce Functional Ingredients

Biochanin A (an Isoflavone Produced by Red Clover) Promotes Weight Gain of Steers Grazed in Mixed Grass Pastures and Fed Dried‐Distillers’ Grains

Effects of Hops (&lt;i&gt;Humulus lupulus&lt;/i&gt; L.) Beta-Acids on Short Chain Fatty Acid Production from Complex Carbohydrates by Rumen Microbiota

Contact Info

Product

Resources

About

Effects of Hops (<i>Humulus lupulus</i> L.) Beta-Acids on Short Chain Fatty Acid Production from Complex Carbohydrates by Rumen Microbiota