scholarly journals Spent Brewer’s Yeast as a Source of Insoluble β-Glucans

2021 ◽  
Vol 22 (2) ◽  
pp. 825
Author(s):  
Ionut Avramia ◽  
Sonia Amariei
Keyword(s):  
Emulsion Stability ◽  
Extraction Process ◽  
Brewer’S Yeast ◽  
Brewer's Yeast ◽  
Brewing Process ◽  
Food Applications ◽  
Water Holding ◽  
Potential Food ◽  
Insight Into

In the brewing process, the consumption of resources and the amount of waste generated are high and due to a lot of organic compounds in waste-water, the capacity of natural regeneration of the environment is exceeded. Residual yeast, the second by-product of brewing is considered to have an important chemical composition. An approach with nutritional potential refers to the extraction of bioactive compounds from the yeast cell wall, such as β-glucans. Concerning the potential food applications with better textural characteristics, spent brewer’s yeast glucan has high emulsion stability and water-holding capacity fitting best as a fat replacer in different food matrices. Few studies demonstrate the importance and nutritional role of β-glucans from brewer’s yeast, and even less for spent brewer’s yeast, due to additional steps in the extraction process. This review focuses on describing the process of obtaining insoluble β-glucans (particulate) from spent brewer’s yeast and provides an insight into how a by-product from brewing can be converted to potential food applications.

scholarly journals Kā raugs uzvedas, kad tam atņem būvelementus?

2021 ◽  
Author(s):  
Ernests Tomass Auziņš ◽  
Keyword(s):  
Ethanol Production ◽  
Building Block ◽  
De Novo ◽  
Building Blocks ◽  
Central Metabolism ◽  
De Novo Synthesis ◽  
Brewer’S Yeast ◽  
Glycerol Production ◽  
Brewer's Yeast ◽  
Insight Into

The study explored changes in carbon fluxes in the central metabolism of brewer’s yeast in the absence of building blocks such as adenine or nitrogen. These flows provide insight into changes in the central metabolism of brewer’s yeast. It was found that in the absence of a building block, the yeast mainly uses fermentation for growth, producing ethanol. Deletion of Δade1 in purine de novo synthesis reduces ethanol production, and decreased glycerol production in adenine starvation indicates a slowing of central metabolism.

Superior prebiotic and physicochemical properties of novel dextran from Weissella cibaria JAG8 for potential food applications

2014 ◽  
Vol 5 (9) ◽  
pp. 2324-2330 ◽  
Author(s):  
Jagan Mohan Rao Tingirikari ◽  
Damini Kothari ◽  
Arun Goyal
Keyword(s):  
Thermal Stability ◽  
Physicochemical Properties ◽  
Gastric Juice ◽  
Water Holding Capacity ◽  
Probiotic Bacteria ◽  
Weissella Cibaria ◽  
Flocculation Activity ◽  
Food Applications ◽  
Water Holding ◽  
Potential Food

The dextran fromWeissella cibariaJAG8 showed good water holding capacity, emulsion, and flocculation activity. Dextran displayed greater thermal stability, resistance to hydrolysis by simulated gastric juice and α-amylase and promoted the growth of probiotic bacteria.

A METHOD FOR REARING DENDROCTONUS PONDEROSAE HOPK. (COLEOPTERA: SCOLYTIDAE) FROM EGGS TO PUPAE ON HOST TISSUE WITH OR WITHOUT A FUNGAL COMPLEMENT

1987 ◽  
Vol 119 (2) ◽  
pp. 207-208 ◽  
Author(s):  
D.B. Strongman
Keyword(s):  
Bark Beetles ◽  
Dendroctonus Ponderosae ◽  
Host Tissue ◽  
Suitable Method ◽  
Research Station ◽  
Forest Research ◽  
Brewer’S Yeast ◽  
Brewer's Yeast

The symbiosis between bark beetles and microorganisms, mostly fungi, has been investigated and reviewed by Graham (1967) and Whitney (1982). Bark beetles and their habitat fungi have been studied separately but a suitable method for studying them in combined culture is lacking. To study bark beetles in the laboratory, a method for axenic rearing was developed by Bedard (1966), then improved by Whitney and Spanier (1982). Beetle development was retarded or nil without the addition of Brewer's yeast to the diet (H.S. Whitney, Pacific Forest Research Station (PFRC), Victoria, BC, pers. comm.). The inclusion of yeast in the diet precludes studies of symbiosis, such as the role of fungi in beetle nutrition. I describe a method for rearing bark beetles with or without a fungal complement to investigate this symbiosis

scholarly journals Spent Craft Brewer's Yeast Reduces Production of Methane and Ammonia by Bovine Rumen Microbes

2021 ◽  
Vol 2 ◽  
Author(s):  
Robert W. Bryant ◽  
E. E. Rhys Burns ◽  
Christopher Feidler-Cree ◽  
Denia Carlton ◽  
Michael D. Flythe ◽  
...  
Keyword(s):  
Colorimetric Assay ◽  
Biologically Active ◽  
Brewer’S Yeast ◽  
Rumen Microbes ◽  
Bovine Rumen ◽  
Brewer's Yeast ◽  
Industry Standard ◽  
Significant Research ◽  
Brewing Process

Methane and ammonia are byproducts of rumen fermentation that do not promote animal growth, and methane is a key contributor to anthropogenic climate disruption. Cows eructate every few breaths and typically emit 250–500 L of methane gas daily. Significant research is focused on finding diets and additives that lower the production of methane and ammonia. Emerging research has shown that humulones and lupulones, molecules that are found in the cones of hops (Humulus lupulus), have potential in this regard. These molecules, which are also key flavor components in beer, are biologically active: they are known inhibitors of Gram-positive bacteria. Ruminants' sophisticated digestive systems host billions of microorganisms, and these systems' outputs will likely be affected in the presence of brewer's yeast (Saccharomyces cerevisiae). So-called spent yeast is produced during the beer-brewing process and contains humulones and lupulones in concentrations that vary by beer style, but it is generally discarded as waste. Our research suggests that adding spent craft brewer's yeast to rumen microbes by single time-point 24-h in vitro incubations suppresses production of methane and ammonia. This project examines the correlation between the quantities of hop acids in spent yeast and the production of methane and ammonia by bovine rumen microbes in vitro. We determined, by HPLC, the hop acid concentrations in spent yeast obtained from six beer styles produced at a local brewery. We performed anaerobic incubation studies on bovine rumen microbes, comparing the effects of these materials to a baker's yeast control and to the industry-standard antibiotic monensin. Results include promising decreases in both methane (measured by GC–FID) and ammonia (measured by colorimetric assay) in the presence of craft brewer's yeast, and a strong correlation between the quantities of hop acids in the spent yeast and the reduction of methane and ammonia. Notably, two of the yeast samples inhibited methane production to a greater degree than the industry-standard antibiotic monensin. Our results suggest that spent brewer's yeast has potential to improve ruminant growth while reducing anthropogenic methane emission.

A simple method for determining the metabolic activity of brewer's yeast during the brewing process

1984 ◽  
Vol 1 (3) ◽  
pp. 169-171 ◽  
Author(s):  
J. Šusta ◽  
J. Hodaň ◽  
M. Opekarová ◽  
K. Sigler
Keyword(s):  
Metabolic Activity ◽  
Brewer’S Yeast ◽  
Simple Method ◽  
Brewer's Yeast ◽  
Brewing Process

Plasminogen Activation In Vivo upon Intravenous Infusion of DDAVP

1992 ◽  
Vol 67 (01) ◽  
pp. 111-116 ◽  
Author(s):  
Marcel Levi ◽  
Jan Paul de Boer ◽  
Dorina Roem ◽  
Jan Wouter ten Cate ◽  
C Erik Hack
Keyword(s):  
Monoclonal Antibodies ◽  
Plasminogen Activator ◽  
Plasma Levels ◽  
Fold Increase ◽  
Fibrinolytic System ◽  
Plasminogen Activation ◽  
Plasminogen Activator Activity ◽  
Insight Into

SummaryInfusion of desamino-d-arginine vasopressin (DDAVP) results in an increase in plasma plasminogen activator activity. Whether this increase results in the generation of plasmin in vivo has never been established.A novel sensitive radioimmunoassay (RIA) for the measurement of the complex between plasmin and its main inhibitor α2 antiplasmin (PAP complex) was developed using monoclonal antibodies preferentially reacting with complexed and inactivated α2-antiplasmin and monoclonal antibodies against plasmin. The assay was validated in healthy volunteers and in patients with an activated fibrinolytic system.Infusion of DDAVP in a randomized placebo controlled crossover study resulted in all volunteers in a 6.6-fold increase in PAP complex, which was maximal between 15 and 30 min after the start of the infusion. Hereafter, plasma levels of PAP complex decreased with an apparent half-life of disappearance of about 120 min. Infusion of DDAVP did not induce generation of thrombin, as measured by plasma levels of prothrombin fragment F1+2 and thrombin-antithrombin III (TAT) complex.We conclude that the increase in plasminogen activator activity upon the infusion of DDAVP results in the in vivo generation of plasmin, in the absence of coagulation activation. Studying the DDAVP induced increase in PAP complex of patients with thromboembolic disease and a defective plasminogen activator response upon DDAVP may provide more insight into the role of the fibrinolytic system in the pathogenesis of thrombosis.

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