Journal articles: 'Dietary yeast'

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de Llanos, Rosa, Carlos Andrés Martínez-Garay, Josep Fita-Torró, Antonia María Romero, María Teresa Martínez-Pastor, and Sergi Puig. "Soybean Ferritin Expression in Saccharomyces cerevisiae Modulates Iron Accumulation and Resistance to Elevated Iron Concentrations." Applied and Environmental Microbiology 82, no. 10 (March 11, 2016): 3052–60. http://dx.doi.org/10.1128/aem.00305-16.

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ABSTRACTFungi, including the yeastSaccharomyces cerevisiae, lack ferritin and use vacuoles as iron storage organelles. This work explored how plant ferritin expression influenced baker's yeast iron metabolism. Soybean seed ferritin H1 (SFerH1) and SFerH2 genes were cloned and expressed in yeast cells. Both soybean ferritins assembled as multimeric complexes, which bound yeast intracellular ironin vivoand, consequently, induced the activation of the genes expressed during iron scarcity. Soybean ferritin protected yeast cells that lacked the Ccc1 vacuolar iron detoxification transporter from toxic iron levels by reducing cellular oxidation, thus allowing growth at high iron concentrations. Interestingly, when simultaneously expressed inccc1Δ cells, SFerH1 and SFerH2 assembled as heteropolymers, which further increased iron resistance and reduced the oxidative stress produced by excess iron compared to ferritin homopolymer complexes. Finally, soybean ferritin expression led to increased iron accumulation in both wild-type andccc1Δ yeast cells at certain environmental iron concentrations.IMPORTANCEIron deficiency is a worldwide nutritional disorder to which women and children are especially vulnerable. A common strategy to combat iron deficiency consists of dietary supplementation with inorganic iron salts, whose bioavailability is very low. Iron-enriched yeasts and cereals are alternative strategies to diminish iron deficiency. Animals and plants possess large ferritin complexes that accumulate, detoxify, or buffer excess cellular iron. However, the yeastSaccharomyces cerevisiaelacks ferritin and uses vacuoles as iron storage organelles. Here, we explored how soybean ferritin expression influenced yeast iron metabolism, confirming that yeasts that express soybean seed ferritin could be explored as a novel strategy to increase dietary iron absorption.

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Podpora, B., F. Świderski, A. Sadowska, R. Rakowska, and G. Wasiak-Zys. "Spent brewer’s yeast extracts as a new component of functional food." Czech Journal of Food Sciences 34, No. 6 (December 21, 2016): 554–63. http://dx.doi.org/10.17221/419/2015-cjfs.

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The use of yeast extracts as a natural and valuable additive ingredient intended for the production of functional food and dietary supplements were demonstrated. The chemical composition, amino acid analysis, determination of protein molecular weights, antioxidant properties, and sensory evaluation were carried out for two yeast extracts. It was found that the tested extracts are characterised by high essential amino acid content, exceeding the levels of reference protein developed by the FAO/WHO, and high antioxidant activity. Sensory characteristics of tested extracts may favourably influence the quality of the proposed functional foods and dietary supplements. The obtained results indicate that the tested extracts can be utilised as a source of free amino acids and peptides in the design of functional foods and dietary supplements.

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Szuba-Trznadel, Anna, Tomasz Hikawczuk, Małgorzata Korzeniowska, and Bogusław Fuchs. "Dietary Supplementation of a Yeast-Whey Preparation for Weaned Piglets." Acta Veterinaria 70, no. 1 (March 1, 2020): 126–35. http://dx.doi.org/10.2478/acve-2020-0009.

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AbstractWeaning is a stressful period for the piglets and the sow. Stress during weaning is related to the change of diet which can affect the physiology of the gastrointestinal tract, as well as the microbial and immunological status of the animals. In the experiment a yeast-whey preparation was used to decrease the transient growth depression related to reduction of feed intake by the piglets. The piglets were assigned to three treatments. In the control group (I) the animals obtained standard feed mixture used routinely at the farm. In the case of piglets from II and III treatment, the yeast-whey preparation was added in the quantity of 4 and 7%, respectively.Application of 7% yeast-whey preparation to the diet significantly increased the body weight of piglets (p<0.05) and in consequence the average daily body weight gain (p<0.01) in comparison with the control group of animals. Additionally, piglets which were fed the yeast-whey preparation diet had a higher feed intake (p<0.05) and better feed conversion ratio (p<0.05) than those fed a diet without the addition of this preparation. No significant differences were stated for most biological parameters (p>0.05), except for the blood urea level, which was significantly lower (p<0.05) in the treatments where the yeast-whey preparation was used. These results indicated that yeast-whey preparation efficiently suppressed post-weaning diarrhea and improved the performance of the animals.

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Stabnikova, Olena, Volodymyr Ivanov, Irina Larionova, Viktor Stabnikov, Malgorzata A. Bryszewska, and John Lewis. "Ukrainian dietary bakery product with selenium-enriched yeast." LWT - Food Science and Technology 41, no. 5 (June 2008): 890–95. http://dx.doi.org/10.1016/j.lwt.2007.05.021.

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Morais, Paula Benevides de, Raphael Sanzio Pimenta, Inara Brito Tavares, Virginia de Garcia, and Carlos Augusto Rosa. "Yeasts Occurring in Surface and Mouth Cavity of Two Chelonian Species,Podocnemis expansaSchweigger andP. unifilisTroschel (Reptilia: Chelonia: Pelomedusidae), in the Javaés River Border of Araguaia National Park in Brazil." International Journal of Microbiology 2010 (2010): 1–5. http://dx.doi.org/10.1155/2010/504524.

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Thirty-eight specimens of free-rangingPodocnemis expansa(Amazon turtle) and 22 ofP. unifilis(Tracajá) were screened for yeast isolation from surface (plastron, skin, and nails), eye, and mouth cavity. A hundred and eighteen yeast isolates belonging to 39 species were obtained.Debaryomyces hansenii,Candida galli,C. sake, andRhodotorula mucilaginosawere the most frequent species isolated from these chelonians. Species diversity measured by Shannon's index was shown to be low and a degree of dominance could be detected as species known as potential pathogens were commonly isolated. The effective number of species in plastron ofP. expansawas higher than in mouth samples, but not inP. unifilisprobably due to dietary factors.P. expansaanimals were captured on the beaches, and the superficial yeast populations may include terrestrial species.P. unifilisanimals were captured in the water and the yeasts from superficial sites may represent species from river water.

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Begea, Mihaela, Iuliana Diana Barbulescu, Lacramioara Popa, Carmen Otilia Rusanescu, Madalina Georgiana Albu Kaya, Razvan Ionut Teodorescu, Simona-Ioana Marinescu, et al. "Novel Assessment Method of the Critical Parameters for Brewing Yeast Formulation as a Nutraceutical in Animal Diets." Revista de Chimie 71, no. 2 (March 3, 2020): 167–74. http://dx.doi.org/10.37358/rc.20.2.7911.

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Brewing yeast biomasses may be converted into valuable products, including supplements for ruminant diets. This paper presents experimental data on a nutraceutical suspension formulation containing post-fermentation brewing yeasts and the brewing yeast strain, Saccharomyces pastorianus ssp. carlsbergensis W34/70, which was intended to be administered to ruminants. The brewing yeast biomass is a component of oral suspensions designed as dietary supplements that prevent digestive acidosis in ruminants. The brewing yeast strain W34/70 was cultivated using molasses (M) and glucose (G) as carbon sources and was lyophilized at different freezing temperatures (0�C, �10�C, �20�C, �30�C, and �40�C). The post-fermentation brewing yeast biomass was spray dried (AAY) and lyophilized (ALY). Both dried yeast biomasses were analyzed in terms of wettability using a contact angle (CA�) evaluation at the solid/liquid interface. Suspensions were subsequently formulated and tested. Their physical and aggregative stability was established in connection with controlled sedimentation and flocculation. The assays were performed following quality by design (QbD) principles. The critical process parameters (CPPs) corresponding to the technological process of yeast production, as well as the critical quality attributes (CQAs) for suspension formulations, were pointed out as preamble determinants when designing oral nutraceuticals destined to be included in ruminant diets.

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Duxbury, Elizabeth M. L., and Tracey Chapman. "Sex-Specific Responses of Life Span and Fitness to Variation in Developmental Versus Adult Diets in Drosophila melanogaster." Journals of Gerontology: Series A 75, no. 8 (July 31, 2019): 1431–38. http://dx.doi.org/10.1093/gerona/glz175.

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Abstract Nutritional variation across the lifetime can have significant and sex-specific impacts on fitness. Using Drosophila melanogaster, we measured these impacts by testing the effects on life span and reproductive success of high or low yeast content in developmental versus adult diets, separately for each sex. We tested two hypotheses: that dietary mismatches between development and adulthood are costly and that any such costs are sex-specific. Overall, the results revealed the rich and complex responses of each sex to dietary variation across the lifetime. Contrary to the first hypothesis, dietary mismatches between developmental and adult life stages were not universally costly. Where costs of nutritional variation across the life course did occur, they were sex-, context-, and trait-specific, consistent with hypothesis 2. We found effects of mismatches between developmental and adult diets on reproductive success in females but not males. Adult diet was the main determinant of survival, and life span was significantly longer on high yeast adult food, in comparison to low, in both sexes. Developing on a high yeast diet also benefited adult female life span and reproductive success, regardless of adult diet. In contrast, a high yeast developmental diet was only beneficial for male life span when it was followed by low yeast adult food. Adult diet affected mating frequency in opposing directions, with males having higher mating frequency on high and females on low, with no interaction with developmental diet for either sex. The results emphasize the importance of sex differences and of the directionality of dietary mismatches in the responses to nutritional variation.

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Rowlinson, P., S. P. Marsh, C. Tufnell, and W. Taylor. "The Influence of a dietary supplement of a dried yeast culture on milk yield and composition in dairy cows on grass silage." Proceedings of the British Society of Animal Science 1996 (March 1996): 75. http://dx.doi.org/10.1017/s1752756200592746.

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There is considerable interest in the effect of dietary supplementation with probiotics or yeast cultures on diary cow performance. Yeast cultures such as Diamond V 'XP' are produced by growing selected yeast strains on a semi-solid medium under stressed conditions, which are then dried. Yeast cultures are now used by a majority of the high yielding herds in North America (McCullough 1995). The objective of this work was to evaluate the effect of feeding 'XP' Yeast to a moderate-high yielding (X, 6800kg) herd of dairy cows fed a typical UK diet based on grass silage.72 recently calved Holstein-Friesian dairy cows were allocated to one of two dietary treatments on which they remained throughout 150 days of winter feeding. Both groups received ad libitum grass silage which had a Dry Matter of 224 g/Kg, an estimated ME of 10.8 MJ/Kg DM and a Crude Protein (CP) of 156 g/Kg DM.

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Rowlinson, P., S. P. Marsh, C. Tufnell, and W. Taylor. "The Influence of a dietary supplement of a dried yeast culture on milk yield and composition in dairy cows on grass silage." Proceedings of the British Society of Animal Science 1996 (March 1996): 75. http://dx.doi.org/10.1017/s0308229600030452.

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There is considerable interest in the effect of dietary supplementation with probiotics or yeast cultures on diary cow performance. Yeast cultures such as Diamond V 'XP' are produced by growing selected yeast strains on a semi-solid medium under stressed conditions, which are then dried. Yeast cultures are now used by a majority of the high yielding herds in North America (McCullough 1995). The objective of this work was to evaluate the effect of feeding 'XP' Yeast to a moderate-high yielding (X, 6800kg) herd of dairy cows fed a typical UK diet based on grass silage.72 recently calved Holstein-Friesian dairy cows were allocated to one of two dietary treatments on which they remained throughout 150 days of winter feeding. Both groups received ad libitum grass silage which had a Dry Matter of 224 g/Kg, an estimated ME of 10.8 MJ/Kg DM and a Crude Protein (CP) of 156 g/Kg DM.

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Holdsworth, E. S., D. V. Kaufman, and E. Neville. "A fraction derived from brewer's yeast inhibits cholesterol synthesis by rat liver preparations in vitro." British Journal of Nutrition 65, no. 2 (March 1991): 285–99. http://dx.doi.org/10.1079/bjn19910087.

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Brewer's yeast was grown on a defined medium containing tracer51Cr with or without added chromium. The two batches of yeast contained 10 μg/g (high-Cr) or 80 ng/g (low-Cr). Extracts were prepared and fractionated. A third batch of yeast (third batch) was grown with added Cr, and fractionated. Rats were reared on either rat cubes (normal diet) or on a low-Cr diet (low-Cr), or on rat cubes with added cholestyramine (cholestyramine diet). Preparations of rat liver, both cell-free and intact hepatocytes, incorporated acetate-carbon into fatty acids and cholesterol. These processes were inhibited by a yeast fraction containing small, neutral, water-soluble compounds. The degree of inhibition was the same whether the liver came from normal rats or rats fed on the low-Cr diet. Similarly the inhibitory effect was found with identical amounts of extracts from low- or high-Cr yeasts. Therefore, Cr compounds do not appear to account for the inhibitory effects of brewer's yeast. Use of other substrates indicated that the site of inhibition of sterol synthesis was apparently between acetyl-CoA and mevalonate. One inhibitory substance was isolated from yeast and was found to be nicotinamide riboside. This may have been produced from NAD(P) during the preparation of yeast extracts, and it may be produced from dietary yeast supplements during digestion in vivo. Nicotinamide riboside may be partly responsible for the reported effects of yeast supplements on plasma lipids in humans.

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Beski, S. S. M., S. A. M’Sadeq, S. M. Hussein, and A. L. Mahmod. "PERFORMANCE AND PHYSIOLOGICAL RESPONSES OF BROILER CHICKENS TO DIETARY COMBINATION OF YEAST AND MEDICAL PLANTS." IRAQI JOURNAL OF AGRICULTURAL SCIENCES 52, no. 5 (October 21, 2021): 1117–25. http://dx.doi.org/10.36103/ijas.v52i5.1450.

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This feeding trial was conducted to investigate the effect of medical plants and yeast cell wall on the performance and subsequent physiology of broiler chickens. A total of 200 d-old Ross 308 broiler chicks were randomly allocated to 5 treatments that were replicated 4 times of 10 birds. The first treatment was the control while the remaining four treatments were supplemented with one of these mixtures (peppermint and Chamomile; peppermint powder and yeast cell wall; chamomile powder and yeast cell wall; peppermint, yeast cell wall and chamomile powder). Throughout the experimental period, feed intake was almost not affected by dietary treatments. At days 24 and 35 of age, birds on diets containing mixtures of herbal plants or herbal plants with yeast gained more weight than the control group. Feed conversion ratio of the 24 d-old broilers was significantly improved by the combination of herbal plants and its combination with yeast. However, when assessed over the 35 d experimental period, it was almost same among all experimental units. The relative weight of visceral organs and bursal morphology were not affected by dietary treatments. Significantly lower serum cholesterol and longer jejunum villi were detected in birds that were offered diets supplemented with mixture of herbal plants alone or its combination with yeast.

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Fontagné-Dicharry, Stéphanie, Simon Godin, Haokun Liu, Philip Antony Jesu Prabhu, Brice Bouyssière, Maïté Bueno, Philippe Tacon, Françoise Médale, and Sadasivam J. Kaushik. "Influence of the forms and levels of dietary selenium on antioxidant status and oxidative stress-related parameters in rainbow trout (Oncorhynchus mykiss) fry." British Journal of Nutrition 113, no. 12 (May 20, 2015): 1876–87. http://dx.doi.org/10.1017/s0007114515001300.

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Se is an essential micronutrient required for normal growth, development and antioxidant defence. The objective of the present study was to assess the impact of dietary Se sources and levels on the antioxidant status of rainbow trout (Oncorhynchus mykiss) fry. First-feeding fry (initial body weight: 91 mg) were fed either a plant- or fishmeal-based diet containing 0·5 or 1·2 mg Se/kg diet supplemented or not with 0·3 mg Se/kg diet supplied as Se-enriched yeast or sodium selenite for 12 weeks at 17°C. Growth and survival of rainbow trout fry were not significantly affected by dietary Se sources and levels. Whole-body Se was raised by both Se sources and to a greater extent by Se-yeast. The reduced:oxidised glutathione ratio was raised by Se-yeast, whereas other lipid peroxidation markers were not affected by dietary Se. Whole-body Se-dependent glutathione peroxidase (GPX) activity was enhanced in fish fed Se-yeast compared to fish fed sodium selenite or non-supplemented diets. Activity and gene expression of this enzyme as well as gene expression of selenoprotein P (SelP) were reduced in fish fed the non-supplemented plant-based diet. Catalase, glutamate–cysteine ligase and nuclear factor-erythroid 2-related factor 2 (Nrf2) gene expressions were reduced by Se-yeast. These results suggest the necessity to supplement plant-based diets with Se for rainbow trout fry, and highlight the superiority of organic form of Se to fulfil the dietary Se requirement and sustain the antioxidant status of fish. GPX and SelP expression proved to be good markers of Se status in fish.

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Khan, Naheeda, and D. J. A. Cole. "The effect of dietary inclusions of phytase and yeast on apparent phosphorus digestibility in pigs." Proceedings of the British Society of Animal Production (1972) 1993 (March 1993): 63. http://dx.doi.org/10.1017/s0308229600023898.

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Enzymic hydrolysis of phytates has been shown to improve the apparent digestibility of phosphorus. Other nutrients bound to phytates may be released during phytate degradation by phytases. Dietary yeast may also improve the availability of phosphorus to pigs by altering gut fermentation patterns.The objectives of this experiment were (1) to study the effects of phytase on the apparent digestibility of phosphorus and other nutrients associated with phytates, and (2) to determine whether an alteration in fermentation induced by dietary yeast inclusion influenced availability of phosphorus.

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Baldi, A., V. Bontempo, V. Dell'Orto, F. Cheli, F. Fantuz, and G. Savoini. "Effects of dietary chromium-yeast in weaning-stressed piglets." Canadian Journal of Animal Science 79, no. 3 (September 1, 1999): 369–74. http://dx.doi.org/10.4141/a98-117.

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The aim of this study was to evaluate the effects of Cr supplementation (as Cr-yeast) on growth performance, some blood parameters and neutrophils superoxide anion production, in weaning-stressed piglets. Thirteen crossbred (Landrace × Large White) litters were assigned to Cr-supplemented prestarter diet for 21 d (from 10 d after birth to 7 d post-weaning). Thirteen other litters, forming the control group, were not given supplemental Cr. Blood samples were taken on day 3 post-weaning and 1 h after litters were moved to the post-weaning facilities (day 7 post-weaning). To enhance stress response, ACTH (5 µ g kg−1 BW) was given to some animals immediately before moving. Cromium supplementation did not improve piglet weight or superoxide production by neutrophils. The plasma concentration of non-esterified fatty acids was higher (P < 0.05) and glucose concentration was lower (P < 0.05) at 7 d post-weaning compared with 3 d in both treated and control piglets. In ACTH-challenged piglets, a further lowering of blood glucose was associated with Cr supplementation (P < 0.05), but cortisol and insulin levels were not affected by dietary treatment. These data suggest that Cr supplementation does not reduce weaning stress in piglets. However, in high-stress conditions (as simulated by ACTH challenge) Cr supplementation may improve peripheral glucose utilisation. Key words: Chromium supplement, piglet, blood parameters, weaning stress

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Barclay, G. R., H. McKenzie, D. Parratt, and C. R. Pennington. "Does dietary yeast affect the activity of Crohn's disease?" Clinical Nutrition 10 (January 1991): 45. http://dx.doi.org/10.1016/0261-5614(91)90254-a.

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Campos, Sergio E., and Alexander DeLuna. "Functional genomics of dietary restriction and longevity in yeast." Mechanisms of Ageing and Development 179 (April 2019): 36–43. http://dx.doi.org/10.1016/j.mad.2019.02.003.

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Bellutti, Nathalie, Andreas Gallmetzer, Gerd Innerebner, Silvia Schmidt, Roland Zelger, and Elisabeth Helene Koschier. "Dietary yeast affects preference and performance in Drosophila suzukii." Journal of Pest Science 91, no. 2 (November 3, 2017): 651–60. http://dx.doi.org/10.1007/s10340-017-0932-2.

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Kim, K. M., U. J. Chang, D. H. Kang, J. M. Kim, Y. M. Choi, and H. J. Suh. "Yeast hydrolysate reduces body fat of dietary obese rats." Phytotherapy Research 18, no. 11 (2004): 950–53. http://dx.doi.org/10.1002/ptr.1582.

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Abbas, S., M. A. Rashid, M. S. Yousaf, S. Ashraf, I. Rabbani, H. Zaneb, S. K. Tahir, A. H. Shahzad, and H. Rehman. "Effect of maternal yeast feeding on dam performance and serum health biomarkers of Beetal goat kids." South African Journal of Animal Science 50, no. 2 (July 1, 2020): 281–90. http://dx.doi.org/10.4314/sajas.v50i2.11.

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Supplementation with dietary yeast has improved digestibility and productive performance in ruminants. In this research the primary objective was to appraise the effects of dietary yeast supplementation of female goats during the transition period on milk composition and yield and on production and serum health biomarkers of their kids. Twenty-four Beetal goats (4 ± 1.2 years) were randomly assigned to three groups, which received 0, 5, and 10 grams/animal/day of live dried yeast Saccharomyces cerevisiae for 60 days (30 days pre- and post-partum). All goats were fed 500 grams of concentrate with water and green fodder ad libitum. Milk samples were collected at 7, 14, 21, and 28 days post kidding. Kids were weighed on days 0, 7, 15, 22, and 30, and blood samples were collected on days 15 and 30 for serum metabolites (glucose, urea, cholesterol, non-esterified fatty acids (NEFA), serum total proteins, albumin, globulin, albumin to globulin ratio, serum oxidant and antioxidant activity (malondialdehyde) (MDA) and catalase), and liver enzymes aspartate aminotransferase (AST) and alanine transaminase (ALT) assessment. Milk yield was significantly (P =0.02) higher during the post-partum period in yeast-fed goats. Yeast-fed goats also produced milk containing more fat (P <0.001) and protein (P <0.001) compared with control goats. Birth weight, average daily gain, and serum health biomarkers of the kids were not influenced by the treatments. In conclusion, dietary yeast supplementation resulted in increased production performance of the dams without significant impact on their offspring.Keywords: average daily gain, catalase activity, hepatic enzymes, milk production, Saccharomyces cerevisiae, transition period

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Musselman, Megan E., Rebecca S. Pettit, and Karrie L. Derenski. "A Review and Update of Red Yeast Rice." Journal of Evidence-Based Complementary & Alternative Medicine 17, no. 1 (December 4, 2011): 33–39. http://dx.doi.org/10.1177/2156587211429703.

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Dyslipidemia is a growing concern causing significant morbidity and mortality. High cholesterol levels increase the risk of individuals developing heart disease, stroke, and other disease states. Dietary modification is the initial approach for treatment, but many patients require statins (3-hydroxy-3-methylglutaryl co-enzyme A reductase inhibitors) to reduce cardiovascular risk. Unfortunately, a number of patients cannot tolerate statins, leading to practitioners searching for alternative regimens. One alternative that has been extensively studied is red yeast rice ( Monascus purpureus), a dietary supplement. In patients with dyslipidemia, red yeast rice was efficacious and safe for short-term use (<16 weeks). Red yeast rice has also been studied head to head with statins and was shown to be noninferior in reducing cholesterol levels and cardiovascular risk. Because of the positive clinical effects seen in dyslipidemia, researchers have begun to study its use in other disease states.

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Rentsenkhand, J., and N. Togtokhbayar. "EFFECT OF YEAST (CANDIDA UTILIS) ON THE COMMERCIAL LAYER HEN’S LIVE WEIGHT AND EGG PRODUCTION." Mongolian Journal of Agricultural Sciences 13, no. 2 (June 22, 2015): 114–16. http://dx.doi.org/10.5564/mjas.v13i2.529.

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In order to investigate the effect of a yeast on laying hens performance and live weight, one hundred Rodonit-3 breed laying hens (75 week of age), were selected and randomly allocated to 25 pens containing 4 laying hens each with 6 replicates and assigned to receive one of 4 dietary treatments (1. Control, 2. Yeast 2%, 3.Yeast 4%, 4.Yeast 6%). The results showed that egg production and egg weight not significantly different, live weight and feed intake significant differences.Mongolian Journal of Agricultural Sciences Vol.13(2) 2014: 114-116

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Muñoz, C., D. A. Wills, and T. Yan. "Effects of dietary active dried yeast (Saccharomyces cerevisiae) supply at two levels of concentrate on energy and nitrogen utilisation and methane emissions of lactating dairy cows." Animal Production Science 57, no. 4 (2017): 656. http://dx.doi.org/10.1071/an15356.

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Twenty early lactation dairy cows were used to evaluate the effects of the dietary addition of an active dried yeast product at two levels of concentrate on productive performance, nutrient digestibility, methane (CH4) emissions and energy and nitrogen utilisation. This study was a replicated 4 × 4 Latin square design with a two (concentrate level) × two (yeast supplement) factorial treatment arrangement, with four periods (6 week/period) and a 3-week interval between each period. Cows were offered grass silage-based diets consisting of two levels of concentrate (300 and 600 g/kg), with or without supplement of 0.5 g/day of an active dry yeast (Saccharomyces cerevisiae strain) with a specification of 2 × 1010 cfu/g. Feed dry matter intake, milk yield, milk composition, bodyweight and body condition score were similar between yeast treatments at both concentrate levels. Nutrient digestibility was not affected by yeast supplementation. Energy intake and faecal, urinary, CH4 and milk energy outputs were also not affected by yeast supplementation. Yeast supplementation had no effects on energy partitioning but tended to increase heat production and decreased energy retention. Yeast supplementation at two levels of concentrate had no effect on total CH4 emissions, but tended to increase CH4 per unit of feed intake and CH4 energy output per unit of gross energy intake. There were no effects of yeast supplementation on CH4 per unit of milk yield. Yeast supplementation had no effect on any variable of nitrogen intake, output or utilisation. Overall, the dietary addition of an active dried yeast product at two concentrate feeding levels had no effects on feed intake, milk production, milk composition, nutrient digestibility, or nitrogen utilisation efficiency and only tended to increase heat production, CH4 per unit of feed intake and CH4 energy output per unit of gross energy intake in lactating dairy cows.

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Bianchi, Flavia, Urban Spitaler, Peter Robatscher, Rudi F. Vogel, Silvia Schmidt, and Daniela Eisenstecken. "Comparative Lipidomics of Different Yeast Species Associated to Drosophila suzukii." Metabolites 10, no. 9 (August 28, 2020): 352. http://dx.doi.org/10.3390/metabo10090352.

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Yeasts constitute a dietary source for the spotted wing drosophila (SWD) and produce compounds that attract these flies. The study of the chemical composition of the yeast communities associated with SWD should therefore help to understand the relationship between the biology of the insect and the yeast’s metabolism. In the present study, the lipidome of five yeast species isolated from grapes infested by SWD (three Hanseniaspora uvarum strains, Candida sp., Issatchenkia terricola, Metschnikowia pulcherrima and Saccharomycopsis vini) and a laboratory strain of Saccharomyces cerevisiae was explored using an untargeted approach. Additionally, the lipid profile of two species, S. cerevisiae and H. uvarum, which were reported to elicit different responses on SWD flies based on feeding and behavioral trials, was compared with a chemical enrichment approach. Overall, 171 lipids were annotated. The yeast species could be distinguished from each other based on their lipid profile, except for the three strains of H. uvarum, which were very similar to each other. The chemical enrichment analysis emphasized diversities between S. cerevisiae and H. uvarum, that could not be detected based on their global lipid profile. The information concerning differences between species in their lipidome may be of interest to future entomological studies concerning the yeast-insect interaction and could help to explain the responses of SWD to diverse yeast species.

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SIDDIG SWAR, NEDAL MOHAMMED, and ASAAD HASSAN WIDAA MOHAMED. "Incorporation of dietary palm date pits in all-male Nile tilapia (Oreochromis niloticus) diets." Nusantara Bioscience 10, no. 3 (August 1, 2018): 193–202. http://dx.doi.org/10.13057/nusbiosci/n100310.

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Swar NMS, Mohamed AHW. 2018. Incorporation of dietary palm date seeds in all-male Nile tilapia (Oreochromis niloticus) diets. Nusantara Bioscience 10: 193-202. The study utilizes a 45-days randomized factorial design 3×2, three levels (25, 50 and 75%) of palm date seeds, three levels (non, with and without) of 3% bakery yeast (Saccharomyces cerevisiae) and three replicates. The observation was carried out in twenty-one plastic aquaria. All-male Nile tilapia (Oreochromis niloticus) fingerlings were put in each aquarium. Each aquarium was provided with well-aerated and triggered dechlorinated tap water with an average weight of 1.9±1.11 g/fish (10 fish/aquaria) and a total length of 5.18±0.69 cm/fish. Fish were given food three times/day (10 days, at 8.30,11.30, 3.30 A.M) at a rate of 12, 8 and 4% of body weight, to examine the impact of partial substitution of animal protein (fish meal) in the diet on growth achievement, carcass contexture, feed utilization, condition factor (k) and feed expense. Seven experimental diets were prepared; control diet (T0, CP 36.84) concluding 45% (fish meal) as animal protein and 0% (palm date seed meal) plant protein. Tested diets (T1, T2 and T3) concluding 25, 50, 75% with 3% bakery yeast (CP 35.71, 35.53, 34.74) and 25, 50, 75% without yeast (CP36.01, 36.27 and 35.57) respectively ; so, they substitute about 75, 50, and 25 of fish meal diet respectively. The outcomes showed that, tilapia were given food on T1, T2 and T4 diets (25, 50, and 25%) substitution with and without yeast respectively registered the greater growth achievement, feed and protein utilization than other experimental diets such as control diet, also they indicate the highest condition factor (K) grades which state that the fish are in decent health. Tilapia were given food by diet T3 (25% fish meal) T5, T6 (50 and 25% fish meal) with and without yeast respectively possessed deficient growth and diverged remarkably (p>0.05) from the other diets. Diet contexture remarkably had an impact on carcass contexture. These data prompted that Palm date seed with and without yeast S. cerevisiae can, to a certain extent, substitute fish meal (animal protein) in a diet for all-male Nile tilapia fingerlings at level-up to 50 and 25% with and without yeast respectively, without any unfavorable result on accretion achievement. Furthermore, fish diet, partially substituted with 3% yeast, resulted from superior accretion achievement than other diets within the present experimental circumstance. This study showed that there is an economic efficiency of confounding palm date seed (plant protein) as partial substitution of fish meal (animal protein) with and without yeast in all-male Nile tilapia, that it could decrease the expense of feeds.

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Hennessy, DW, and PJ Williamson. "Fresh brewer's yeast slurry as a supplementary nitrogen source for cattle given native pasture hay or grain-based diets." Australian Journal of Experimental Agriculture 33, no. 1 (1993): 1. http://dx.doi.org/10.1071/ea9930001.

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Two experiments evaluated brewer's yeast slurry [mean (� s.d.) dry matter (DM) 9.7 � 3.8% and nitrogen (N) content 45.6 � 19.5 gkg DM] as a source of dietary protein for steers on a low N hay diet (experiment 1) and as a low cost supply of protein in a feedlot diet (experiment 2). Experiment 1 was an attempt to improve the N supply to rumen microflora, and total protein to the intestine. There was no improvement in liveweight gain of steers, or in their feed conversion efficiency (FCE), when up to 4.4 kg of yeast slurry (i.e. 423 g DM) was added to the basal diet. Mean (� s.e.) liveweight gain of non-supplemented steers was 402 f 13 1 g/day, with a mean (� s.e.m.) FCE of 12.2 � 1.9 kg DM intake/kg liveweight gain. There was a significant (P<0.05) improvement in liveweight gain (714 g/day) and FCE (7.8 kg DM intake/kg liveweight gain) when cottonseed meal, included as a positive control treatment, was added to the hay diet; however, N intake was higher in this diet (97.7 g/day) than in those based on yeast slurry (range 43.6-62.3 g/day). Experiment 2 was designed to assess the suitability of yeast slurry for replacing cottonseed meal and lucerne chaff as a protein source in grain-based feedlot diets. Yeast slurry did not significantly increase liveweight gain of steers, but when 1 diet with 61% yeast slurry (percentage fed, range 0-71.4%) was excluded from the evaluation, increased dietary proportions of yeast were associated with increased liveweight gains (r = 0.99) and carcass yield (r = 0.89). The range in slurry DM contents (4.8-15.6%) required close monitoring, with daily changes made to the amounts of slurry offered to maintain dietary N and protein levels in the experiments. This range would make it difficult for commercial feed compounders to produce a diet of consistent quality.

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Ahiwe, Emmanuel Uchenna, Medani Eldow Abdallh, Edwin Peter Chang’a, Apeh Akwu Omede, Mohammed Al-Qahtani, Harriet Gausi, Hadden Graham, and Paul Ade Iji. "Influence of dietary supplementation of autolyzed whole yeast and yeast cell wall products on broiler chickens." Asian-Australasian Journal of Animal Sciences 33, no. 4 (April 1, 2020): 579–87. http://dx.doi.org/10.5713/ajas.19.0220.

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Objective: This study evaluated the effect of yeast products on growth performance, visceral organ weights, endogenous enzyme activities, ileal nutrient digestibility and meat yield of broiler chickens fed diets containing autolyzed whole yeast (WY) and yeast cell walls (YCW) at varying levels of inclusion.Methods: Nine dietary treatments consisting of WY or YCW included at 0.5, 1.0, 1.5, or 2.0 g/kg diet and a control diet without yeast supplementation was used in the experiment. Each of the nine treatments was replicated six times with nine birds per replicate. Birds were housed in cages, in climate-controlled rooms and fed starter, grower and finisher diets.Results: There was an improvement (p<0.05) in body weight gain and feed conversion ratio on d 10, 24, and 35 for birds fed 1.0 to 2.0 g/kg WY or YCW diet. Small intestine weight was heavier on d 10 and 24 for birds on higher levels of WY and YCW compared to the control group. On d 10 and 24, there was a significant increase (p<0.05) in tissue protein content and pancreatic enzyme activities (trypsin and chymotrypsin) of birds on 1.5 to 2.0 g/kg WY and YCW diets compared to the control group. Compared to the control group, birds on WY (2.0 g/kg diet) and YCW (at 1.5 and 2.0 g/kg diet) had better (p<0.05) protein digestibility on d 24. On d 35, there was significant improvement (p<0.05) in percentage of carcass, absolute and relative breast weight for broiler chickens fed WY and YCW mostly at 2 g/kg diet compared to birds on the control diet.Conclusion: Supplementation of diets with autolyzed WY and YCW products especially at 1.5 to 2.0 g/kg diet improved broiler chicken performance and meat yield through their positive effects on ileal protein digestibility and pancreatic enzyme activities.

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Facchinetti, Fabio, Rossella E. Nappi, Maria Grazia Sances, Isabella Neri, Giuseppe Grandinetti, and Andrea Genazzani. "Effects of a Yeast-Based Dietary Supplementation on Premenstrual Syndrome." Gynecologic and Obstetric Investigation 43, no. 2 (1997): 120–24. http://dx.doi.org/10.1159/000291836.

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Rumsey, Gary L., Steven G. Hughes, and John L. Kinsella. "Use of Dietary Yeast Saccharomyces cerevisiae Nitrogen by Lake Trout." Journal of the World Aquaculture Society 21, no. 3 (September 1990): 205–9. http://dx.doi.org/10.1111/j.1749-7345.1990.tb01024.x.

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Ruetenik, Andrea, and Antoni Barrientos. "Dietary restriction, mitochondrial function and aging: from yeast to humans." Biochimica et Biophysica Acta (BBA) - Bioenergetics 1847, no. 11 (November 2015): 1434–47. http://dx.doi.org/10.1016/j.bbabio.2015.05.005.

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Sampath, Vetriselvi, Dong Heon Baek, Sureshkumar Shanmugam, and In Ho Kim. "Dietary Inclusion of Blood Plasma with Yeast (Saccharomyces cerevisiae) Supplementation Enhanced the Growth Performance, Nutrient Digestibility, Lactobacillus Count, and Reduced Gas Emissions in Weaning Pigs." Animals 11, no. 3 (March 10, 2021): 759. http://dx.doi.org/10.3390/ani11030759.

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This experiment was performed to examine the hypothesis that blood plasma (BP) with yeast (Saccharomyces cerevisiae) supplement in the diet of weaning pigs could provoke the growth performance, nutrient digestibility, fecal microbial, and reduce harmful gas excretion. A total of one hundred and eighty healthy piglets were taken and assigned (complete random blocks) to three dietary treatments as: Phase 1: Treatment (TRT) 1-6% BP; TRT 2-3% BP + 3% yeast; TRT 3-6% yeast. Phase 2: TRT 1-3%; BP., TRT 2-1.5% BP + 1.5% yeast; TRT 3- 3% yeast. Phase 3: TRT 1- Control (CON) (Basal diet); TRT 2- CON; TRT 3- CON for six- weeks. Each treatment had twelve replicates and five (three gilts and two barrows) pigs per pen. Dietary inclusion of BP with yeast supplementation significantly increased the body weight of piglets during phase 2 (p = 0.003) and phase 3 (p = 0.032). In addition, TRT2 group piglets had a significant improvement in average daily gain at the end of each phase and overall (p = 0.047, 0.025, 0.018 and 0.012, respectively). At phase 3, TRT2 group piglets showed a significant improvement on nutrient digestibility of dry matter (p = 0.012) and nitrogen (p = 0.040). The fecal microbiota of TRT2 group piglets showed a tendency to increase the number of Lactobacillus counts at phase 1 (p = 0.07) and phase 2 (p = 0.06) as well as, a significant improvement at phase 3 (p = 0.021). In addition, TRT2 group piglets had trend to decrease NH3 (p = 0.074) and H2S (p = 0.069) during phase 2, and significantly reduced NH3 (p = 0.038) and H2S (p = 0.046) at phase 3. However, the fecal score of piglets remains unaffected during the entire trial. At the end of phase 1 piglets’ IgG (p = 0.008) was significantly increased with the inclusion of BP with yeast supplementation. Based on the positive effects on body weight, average daily gain, nutrient digestibility, Lactobacillus count, and reduced gas emission, we suggest that dietary supplement with BP and yeast in the diet of weaned piglet could serve as an excellent alternative to antibiotics growth promoters.

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Skiba, Grzegorz, Stanisława Raj, Monika Sobol, Marian Czauderna, Paweł Kowalczyk, and Eugeniusz R. Grela. "Effects of Fish Oil and Dietary Antioxidant Supplementation on Bone Health of Growing Lambs." Animals 11, no. 1 (January 18, 2021): 230. http://dx.doi.org/10.3390/ani11010230.

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The aim of the present study was to assess the effects of partial replacement of rapeseed oil (RO) with fish oil (FO) combined with dietary supplementation of various antioxidants on the characteristics of lamb femur. Thirty male lambs were assigned to five dietary treatments and fed isoproteinous and isoenergetic diets for 35 days. The control diet was enriched with 3.0% RO, while the experimental diets were enriched either only with 2.0% RO and 1.0% FO or additionally with 0.1% carnosic acid, 0.1% carnosic acid and 0.35 ppm Se as selenized yeast, or 0.1% carnosic acid and 0.35 ppm Se as sodium selenite. After 35 days, the lambs were slaughtered, and the femur was dissected from the carcass of each animal and analyzed for morphometric, geometric, densitometric, and biomechanical properties. The dietary modifications, specifically the supplementation of FO and selenized yeast, significantly improved the geometric, densitometric, and biomechanical properties of lamb femur.

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Mir, P. S., and Z. Mir. "Effect of live-yeast culture and lasalocid supplementation on performance of growing–finishing steers fed alfalfa-silage, corn-silage and high-grain diets sequentially." Canadian Journal of Animal Science 74, no. 3 (September 1, 1994): 563–66. http://dx.doi.org/10.4141/cjas94-080.

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Trials were conducted to determine the effect of supplementing feedlot diets with live-yeast culture (YC), lasalocid (LAS) or YC + LAS on intake, growth and carcass characteristics of steers. Dietary additives in either 96% corn-silage or 75% dry-rolled barley-based diets increased (P < 0.05) final weights and carcass weights of steers. Key words: Yeast, lasalocid, steers, carcass quality, growth

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Johnson, Jay E., Jason D. Plummer, Spike D. Postnikoff, Jessica K. Tyler, and Jay E. Johnson. "NOVEL METHIONINE-RELATED INTERVENTIONS THAT CONFER HEALTHSPAN BENEFITS TO YEAST AND RODENTS." Innovation in Aging 3, Supplement_1 (November 2019): S67—S68. http://dx.doi.org/10.1093/geroni/igz038.263.

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Abstract Methionine restriction (MR) is one of only a few dietary manipulations known to robustly extend healthspan in mammals. Methionine-restricted rodents are up to 45% longer-lived than control-fed littermates and a number of studies suggest that humans may also benefit from MR. While a methionine-restricted human diet is technically feasible, compliance to such a regimen might not be practical or desirable. Therefore, an important goal is to identify and/or develop more facile dietary interventions, or preferably, pharmacological agents that mimic MR. Towards this end, we have made use of the yeast chronological lifespan and replicative lifespan assays, which serve as models of aging in quiescent and mitotic cells, respectively. Importantly, our lab and others have demonstrated that MR dramatically extends yeast lifespan. Here we show work aimed at developing novel MR-like interventions that extend yeast lifespan, as well as preliminary data demonstrating that such interventions significantly improve the healthspan of mice.

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Twarużek, Magdalena, Iwona Ałtyn, and Robert Kosicki. "Dietary Supplements Based on Red Yeast Rice—A Source of Citrinin?" Toxins 13, no. 7 (July 17, 2021): 497. http://dx.doi.org/10.3390/toxins13070497.

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Citrinin (CIT) is secondary metabolite of filamentous molds. This mycotoxin has nephrotoxic, hepatotoxic, embryocidal, and fetotoxic properties. It is also produced by several species of the three genera Penicillium spp., Aspergillus spp., and Monascus spp., which are used to make red yeast rice (RYR). The material for this study consisted of 15 dietary supplements containing an extract of fermented red rice, available on the Polish market. Samples were extracted using a MeOH–H2O mixture, cleaned-up with an immunoaffinity CitriTest HPLC column, and quantified by HPLC–FLD. None of the analyzed samples contained CIT above the established limit of detection (LOD). Studies on the presence of toxic metabolites in red yeast rice show the importance of regulating this product and of clear information on the label regarding the standardized amounts of monacolin.

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Armato, L., M. Gianesella, M. Morgante, E. Fiore, M. Rizzo, E. Giudice, and G. Piccione. "Rumen volatile fatty acids × dietary supplementation with live yeast and yeast cell wall in feedlot beef cattle." Acta Agriculturae Scandinavica, Section A — Animal Science 66, no. 2 (April 2, 2016): 119–24. http://dx.doi.org/10.1080/09064702.2016.1272628.

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Sun, Hao Yang, and In Ho Kim. "Effect of yeast culture (Saccharomyces cerevisiae) and garlic (Allium sativum) product mixture on growth performance, nutrient digestibility, faecal microflora, faecal noxious-gas emission and meat quality in finishing pigs." Animal Production Science 60, no. 16 (2020): 1911. http://dx.doi.org/10.1071/an18722.

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Context Dietary supplementation with a single feed additive or a combination of different feed additives as growth promoters has been researched extensively. However, few studies have tested the combined use of probiotics (yeast culture) and phytogenics (garlic products) in pigs. Aims The present study was conducted to evaluate the effect of supplementation of a mixture of yeast culture, garlic extract and garlic essential oil (YGM) on growth performance, nutrient digestibility, faecal microflora, faecal noxious-gas emission and meat quality in finishing pigs. Methods Two hundred [(Landrace×Yorkshire)×Duroc] finishing pigs (50.37 ± 1.89 kg) were randomly allotted into two dietary treatments on the basis of bodyweight (BW) and sex for a 10-week feeding trial. Dietary treatments consisted of a basal diet (CON) and CON containing 0.1% of YGM. The YGM was composed of 54.5% of yeast culture, 40% of garlic extract powder and 5.5% of garlic essential oil. There were 20 replicated pens per treatment, with five pigs (3 barrows and 2 gilts) per pen. Pig BW was measured at the beginning and at the end of the experiment. Feed consumption was recorded daily during the experiment, on a pen basis, to calculate average daily gain (ADG). Key results Dietary YGM supplementation resulted in a higher (P < 0.05) final BW and ADG than in the control groups. Pigs fed YGM supplementation diet led to a higher (P < 0.05) digestibility of dry matter (DM) than in CON. The emission of hydrogen sulfide gas from faeces was significantly (P < 0.05) decreased in pigs fed YGM diets; however, ammonia and total mercaptan emissions were not influenced. There were no differences in meat-quality parameters between the two treatments. Conclusions Dietary YGM supplementation exerted beneficial effects on BW and ADG and DM digestibility, reduced hydrogen sulfide gas emission, and did not have any adverse effects on meat-quality parameters that are related to consumer acceptance. Implications The study has provided a basis and insight for future research on application of a combination of yeast culture, garlic extract and garlic essential oils, as an alternative to antibiotics in finishing pig diets.

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Cordero, Gustavo, Laura A. Merriman, Boris Villca, Nuria Tous, and Rosil Lizardo. "PSVI-3 Effect of Live Yeast Supplementation on Redox Potential, Gastrointestinal Microbiota, and Short-Chain Fatty Acids in Piglets." Journal of Animal Science 100, Supplement_2 (April 12, 2022): 167. http://dx.doi.org/10.1093/jas/skac064.284.

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Abstract The post-weaning period is a stressful process for piglets with compromised gut health, increasing susceptibility to diarrhea and infection. Oxygen concentration in the gut affects microbiome and fermentation profile. Live yeasts have been used to promote gut health and performance of young animals. An experiment was carried out to determine the influence of live yeast on gut conditions including redox potential, microbial composition, and short chain fatty acid (SCFA) production of piglets. Sixteen Pietrain *(Landrace*Large White) piglets were distributed into blocks by live weight and allocated at 4 per pen for a 28-d trial. Each block was composed by a combination of the 2 dietary treatments corresponding to a control diet and a diet supplemented with live yeast (1 kg/tonne Vistacell, AB Vista). At the end of trial, piglets were euthanized to measure kinetics of redox potential (Eh) and pH from caecum until 35 min post-mortem. Then, digesta samples from stomach, duodenum, jejunum, ileum, caecum, and rectum were collected for microbial composition and SCFA production. Data were analyzed using GLM procedure of SAS 9.4 and means compared with a Student-Newman-Keuls test. Redox potential decreased with time (P < 0.001) until stabilizing after 20 min, and a clear difference was observed between treatments (P < 0.001). Supplemented live yeast survives throughout gastrointestinal tract and modifies microbial populations enhancing lactic acid bacteria (P < 0.001) while reducing enterobacteria (P < 0.001) or eliminating fungi (P < 0.001). The production of SCFA from caecum digesta was 3-fold higher than in ileum with significantly different molar proportion of individual SCFA. Lactic, formic, and acetic acids predominate on ileum (> 93%) whereas acetic, propionic, and butyric dominate on caecum digesta (> 90%). Nevertheless, no differences were observed due to dietary treatments. In conclusion, live yeast supplementation of diets modifies redox conditions prevailing in the gut modifying microbial populations and helping piglets to overcome post-weaning growth check.

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Silva, Regiane Gregório da, Ivanor Nunes do Prado, Makoto Matsushita, and Nilson Evelázio de Souza. "Dietary effects on muscle fatty acid composition of finished heifers." Pesquisa Agropecuária Brasileira 37, no. 1 (January 2002): 95–101. http://dx.doi.org/10.1590/s0100-204x2002000100013.

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The effects of diet on Longissimus muscle fatty acid composition was determined using 24 crossbred heifers of Simmental vs. Nelore and Limousin vs. Nelore. The experimental diets were: 1) corn and yeast (CY); 2) corn, cottonseed meal + meat and bones meal (CMB); 3) cassava hull and yeast (CHY); 4) cassava hull, cottonseed meal + meat and bones meal (CHMB). Feeding CHMB diets resulted in lower lipid and higher cholesterol contents (P<0.05) for both crosses. Most of the identified fatty acids were monounsaturated, and the highest percentage was found to oleic acid (C18:1w9), with values ranging from 32.54 to 46.42%. Among the saturated fatty acids the palmitic acid (C16:0) showed the highest percentage, with its contents ranging between 19.40 and 32.44%. The highest polyunsaturated/saturated fatty acid ratio was of 0.30, and the lowest was of 0.08. Feeding CY diets resulted in lower cholesterol and higher polyunsaturated fatty acid contents of the Longissimus muscle.

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Skřivan, M., M. Marounek, M. Englmaierová, and V. Skřivanová. "Influence of dietary vitamin C and selenium, alone and in combination, on the performance of laying hens and quality of eggs." Czech Journal of Animal Science 58, No. 2 (February 12, 2013): 91–97. http://dx.doi.org/10.17221/6619-cjas.

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Two hundred and forty laying hens were fed diets supplemented with vitamin C and selenium (Se). Vitamin C was added at 0 or 200 mg/kg, and Se was added as sodium selenite or selenized yeast at 0.3 mg/kg. The feed intake and egg production were measured, and egg quality parameters were determined. Supplementation of the basal diet with Se significantly increased the laying performance; however, vitamin C significantly decreased feed intake and egg production. Vitamin C increased vitamin E concentration in the yolk. Both selenite and Se-enriched yeast increased the vitamin E concentration in the yolk and the Se concentration in the yolk and albumen. The oxidative stability of yolk lipids was improved in hens fed diets supplemented with sodium selenite, but not in those fed diets supplemented with Se-yeast. After 28 days of storage, however, the beneficial effect of selenite on lipid stability ceased. The supplementation of the basal diet with vitamin C significantly worsened the oxidative stability of yolk lipids, indicating that vitamin C acted as a pro-oxidant. Thus, vitamin C increased the laying performance and influenced some traits of egg quality. The combined supplementation of vitamin C and Se did not prove to be successful.

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Campion, Richard, Leanne Bloxam, Kimberley Burrow, Philip J. Brownridge, Daniel R. Pentland, Patricia Thomas, Campbell W. Gourlay, Claire E. Eyers, Jeff W. Barclay, and Alan Morgan. "Proteomic analysis of dietary restriction in yeast reveals a role for Hsp26 in replicative lifespan extension." Biochemical Journal 478, no. 24 (December 16, 2021): 4153–67. http://dx.doi.org/10.1042/bcj20210432.

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Dietary restriction (DR) has been shown to increase lifespan in organisms ranging from yeast to mammals. This suggests that the underlying mechanisms may be evolutionarily conserved. Indeed, upstream signalling pathways, such as TOR, are strongly linked to DR-induced longevity in various organisms. However, the downstream effector proteins that ultimately mediate lifespan extension are less clear. To shed light on this, we used a proteomic approach on budding yeast. Our reasoning was that analysis of proteome-wide changes in response to DR might enable the identification of proteins that mediate its physiological effects, including replicative lifespan extension. Of over 2500 proteins we identified by liquid chromatography–mass spectrometry, 183 were significantly altered in expression by at least 3-fold in response to DR. Most of these proteins were mitochondrial and/or had clear links to respiration and metabolism. Indeed, direct analysis of oxygen consumption confirmed that mitochondrial respiration was increased several-fold in response to DR. In addition, several key proteins involved in mating, including Ste2 and Ste6, were down-regulated by DR. Consistent with this, shmoo formation in response to α-factor pheromone was reduced by DR, thus confirming the inhibitory effect of DR on yeast mating. Finally, we found that Hsp26, a member of the conserved small heat shock protein (sHSP) family, was up-regulated by DR and that overexpression of Hsp26 extended yeast replicative lifespan. As overexpression of sHSPs in Caenorhabditis elegans and Drosophila has previously been shown to extend lifespan, our data on yeast Hsp26 suggest that sHSPs may be universally conserved effectors of longevity.

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Hossain, M. M., M. M. U. Patoary, S. Akhter, and L. Y. Asad. "Effect of dietary yeast and oligosaccharide on growth performances of broiler." Journal of Agriculture, Food and Environment 01, no. 04 (2020): 157–60. http://dx.doi.org/10.47440/jafe.2020.1423.

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R. Connor, James, Erica L. Unger, Ralph L. Keil, John Flanagan, Stephanie M. Patton, Gabriele R Lubach, Martin M. Schafer, and Christopher L Coe. "Nutritional Yeast Ferritin-Iron Complex: A Novel Source of Dietary Iron." American Journal of Food and Nutrition 9, no. 3 (November 24, 2021): 122–31. http://dx.doi.org/10.12691/ajfn-9-3-5.

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Campos, Sergio E., J. Abraham Avelar-Rivas, Erika Garay, Alejandro Juárez-Reyes, and Alexander DeLuna. "Genomewide mechanisms of chronological longevity by dietary restriction in budding yeast." Aging Cell 17, no. 3 (March 25, 2018): e12749. http://dx.doi.org/10.1111/acel.12749.

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Suzan;YALÇIN, YALÇIN. "Effect of dietary baker's yeast on meat qualıty of broiler chicks." Ankara Üniversitesi Veteriner Fakültesi Dergisi 40, no. 4 (1993): 1. http://dx.doi.org/10.1501/vetfak_0000001533.

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Williams, S. P., S. P. Marsh, and D. Williams. "An evaluation of a dried yeast culture on milk yield and composition in dairy cows fed grass and maize silage." Proceedings of the British Society of Animal Science 1999 (1999): 84. http://dx.doi.org/10.1017/s1752756200002398.

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There is considerable interest in the effect of dietary supplementation with probiotics or yeast cultures on dairy cow performance. Yeast cultures such as Diamond V ‘XP’ are produced by growing selected yeast strains on a semi-solid medium under stressed conditions, which are then dried. They are now used by a majority of the high yielding herds in North America (McCullough, 1995) and have been shown to have a significant effect on butterfat and protein yield with grass silage fed UK dairy cows (Rowlinson et al., 1995). The objective of this work was to evaluate the effect of feeding a yeast culture to a medium-high yielding (8,100 kg) herd of dairy cows fed a diet based on grass and maize silage.

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Suruceanu, Nicoleta, Sonia Socaci, Teodora Coldea, and Elena Mudura. "Revaluation of Waste Yeast from Beer Production." Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Food Science and Technology 70, no. 2 (November 13, 2013): 118. http://dx.doi.org/10.15835/buasvmcn-fst:9494.

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Brewing yeast is an important waste product from beer production. The valorification of slurry yeast mainly consists of separation of vitamins and important nitrogen compounds. The hops compounds, one of the most important raw materials in beer technology are removed beforehand valorification. The prenylflavonoids compounds from hops are important bioactive compounds that can be revaluation with proper technology. Revaluation of prenylflavonoids from waste yeast into dietary supplement, identification and quantification of xanthohumol by HPLC method. Waste yeast from brewery pilot plant of USAMV Cluj Napoca it was dried by atomization and the powder was analyzed on xanthohumol content by HPLC method. For quantification a calibration curve it was used. The process of drying by atomisation lead to a powder product. It was used malt dextrin powder for stabilisation. The final product it was encapsulated. The xanthohumol content of powdered yeast it was 1.94 µg/ml. In conclusion the slurry yeast from beer production it is an important source of prenylflavonoids compounds.

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高, 桂平. "Effects of Dietary Yeast, Yeast RNA, β-Glucan, Yeast Rna and β-Glucan on Growth and Immune Performance of Juvenile Tilapia (Oreochromis niloticud)." Open Journal of Fisheries Research 05, no. 01 (2018): 6–14. http://dx.doi.org/10.12677/ojfr.2018.51002.

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Dogi, C., A. Cristofolini, M. L. González Pereyra, G. García, A. Fochesato, C. Merkis, A. M. Dalcero, and L. R. Cavaglieri. "Aflatoxins and Saccharomyces cerevisiae: yeast modulates the intestinal effect of aflatoxins, while aflatoxin B1 influences yeast ultrastructure." World Mycotoxin Journal 10, no. 2 (May 26, 2017): 171–81. http://dx.doi.org/10.3920/wmj2016.2115.

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The gastrointestinal tract (GIT) is the main site where absorption of food components takes place and the first system coming into contact with mycotoxins of dietary origin. The aim of this work was to study the effect of probiotic Saccharomyces cerevisiae RC016 on intestinal villi of rats exposed to aflatoxins for 60 days. Moreover, the effect of in vitro aflatoxin B1 (AFB1) exposure on yeast cell ultrastructure was evaluated. Six treatments were applied (n=6) to inbred male Wistar rats: (1) uncontaminated feed control (F); (2) yeast control; (3) F + 40 μg/kg AFB1 + 20 μg/kg aflatoxin G1 (AFG1); (4) F + 100 μg/kg AFB1 + 50 μg/kg AFG1; (5) F + 40 μg/kg AFB1 + 20 μg/kg AFG1 + daily oral dose 108 viable S. cerevisiae cells; and (6) F + 100 μg/kg AFB1 + 50 μg/kg AFG1 + daily oral dose 108 viable S. cerevisiae cells. Morphometric measurements (villus length and width, crypt depth, quantification of goblet cells) were assessed using image analysis. S. cerevisiae RC016 cells were exposed to 20 μg/ml of AFB1 in intestinal solutions or in phosphate buffered saline and cells processed for transmission electron microscopy and high resolution light microscopy studies. Dietary exposure to the yeast did not induce significant differences in villus width but increased villus length and crypt depth. Aflatoxin-contaminated diets induced an increase in villus length, width and crypt depth and a significant decrease in the number of goblet cells which were improved by the addition of S. cerevisiae RC016. A significant increase in the yeast cell diameter was observed when RC016 was exposed to aflatoxins, suggesting this as an advantage since a larger cell would be able to adsorb mycotoxins more efficiently. The ability of this strain to act as probiotic and aflatoxin binder makes it a candidate for the formulation of new additives to improve animal performance.

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Basu, Paramita, Sharon Sunny, and Camelia Maier. "ESTROGENIC AND ANTIESTROGENIC ACTIVITIES OF COMMERCIAL DIETARY SUPPLEMENTS CONTAINING HERBAL INGREDIENTS AND ISOFLAVONES." International Journal of Pharmacy and Pharmaceutical Sciences 8, no. 11 (October 28, 2016): 307. http://dx.doi.org/10.22159/ijpps.2016v8i11.14687.

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Objective: This study aimed to assess the estrogenic and antiestrogenic activities of five dietary supplements, commercially available for treatment of menopausal symptoms, before and after gastrointestinal digestion by employing a yeast steroid-regulated transcription system.Methods: Supplements (S) were extracted with either 80% methanol or water. Water extracts were subjected to simulated gastrointestinal (GI) digestion. Estrogenic and antiestrogenic activities were assessed by a steroid-regulated transcription system in Saccharomyces cerevisiae expressing the human estrogen receptor alpha.Results: The highest estrogenic activities were detected in both S1 methanol (2342.5±20.83 MU) and water (1225.6±20.6 MU) extracts (400 estradiol equivalents). Extracts showed antiestrogenic properties by reducing the transcriptional activity induced by estradiol in transgenic yeast. The highest antiestrogenic activity was detected in S2 methanol extract and S3 water extract, which inhibited estradiol activity by 76% and 64%, respectively. After GI digestion, S1, S2 and S3 extracts showed significantly higher estrogenic and antiestrogenic activities as ‘serum-available’ than ‘colon-available’ samples and S4 and S5 extracts showed significantly higher activities as ‘colon-available‘ than ‘serum-available‘ samples.Conclusion: All dietary supplements revealed estrogenic and antiestrogenic activities. The GI digestion demonstrated the availability of phytoestrogens for absorption in the blood stream. Supplements containing soy isoflavones and alfalfa ingredients had the highest estrogenic activities and could be more effective than supplements with complex plant formulation in alleviating menopausal symptoms and treating osteoporosis. The transgenic yeast assays proved to be a powerful tool for assessing the in vitro estrogenic and antiestrogenic activities of dietary supplements.

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Hernández, David Roque, Juan José Santinón, Sebastián Sánchez, and Hugo Alberto Domitrovic. "Dietary soybean meal on growth and intestinal morphology of South American catfish, Rhamdia quelen, larvae." Ciência Rural 42, no. 9 (September 2012): 1662–68. http://dx.doi.org/10.1590/s0103-84782012000900023.

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The effects of the replacement of bread yeast by soybean meal in diets for Rhamdia quelen larvae on growth, survival, and intestinal morphology were analysed. Larvae were fed for 20 days with five diets: a control diet formulated with 57% of bread yeast, and other four diets in which soybean meal at concentrations of 14.25, 28.5, 42.75 and 57% was added to obtain 25, 50, 75 and 100% of bread yeast replacement. Growth and survival parameters were negatively affected by dietary soybean meal inclusion. Larvae fed control diet showed significantly higher mean weight, specific growth rate, final biomass, and survival rate than larvae from other treatments. Enterocyte height and fold width of the posterior intestine showed highest values in the control group, and an inverse linear relationship with the level of dietary soybean meal inclusion was observed, however, in the anterior intestine the morphology parameters were not affected by the diet. These results indicate that inclusion of soybean meal in diets for R. quelen larvae negatively affects growth and survival, as well as the capacity for digestion and absorption of nutrients, mainly in the posterior intestine.

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Journal articles on the topic 'Dietary yeast'

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