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Related Concept Videos

Microbial Fermentation01:23

Microbial Fermentation

Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
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Most eukaryotic organisms require oxygen to survive and function adequately. Such organisms produce large amounts of energy during aerobic respiration by metabolizing glucose and oxygen into carbon dioxide and water. However, most eukaryotes can generate some energy in the absence of oxygen by anaerobic metabolism.
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Microbes in the Production of Fermented Foods

Lactic acid bacteria (LAB) and molds are instrumental in fermenting plant-based foods to enhance preservation and ensure year-round availability. These microbial processes convert plant carbohydrates into organic acids and other metabolites that inhibit spoilage organisms and contribute to the sensory qualities of the final product.In sauerkraut production, cabbage goes through a microbial succession that starts with cocci such as Leuconostoc mesenteroides. These microbes begin fermentation by...
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Microbial fermentation is central to food biotechnology, enhancing flavor, texture, preservation, and stability. Fermentative microorganisms metabolize carbohydrates into organic acids, alcohols, and other metabolites that inhibit spoilage organisms and improve digestibility while contributing distinctive sensory qualities.In baking, amylases naturally present in flour hydrolyze starch into monosaccharides such as glucose, which Saccharomyces cerevisiae ferments anaerobically. Through...
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Continuous fermentation is a key strategy in industrial ethanol production, particularly when efficiency, scalability, and high yields are essential. This approach allows for uninterrupted operation and optimized resource utilization. The primary feedstock, corn starch, undergoes enzymatic hydrolysis facilitated by α-amylase and glucoamylase. These enzymes break down the starch into fermentable sugars such as glucose, which are readily assimilated by fermentative microorganisms.Fermentation...

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Design of Solid-State Fermentation Systems for Polymer Hydrolytic Extracellular Enzyme Production by Filamentous Fungi
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SKIN FERMENTS.

E Sexsmith1, W F Petersen

  • 1Laboratory of Physiological Chemistry of the College of Medicine of the University of Illinois, Chicago.

The Journal of Experimental Medicine
|October 30, 2009
PubMed
Summary
This summary is machine-generated.

Skin reactivity changes significantly from infancy to childhood, linked to alterations in skin ferments. Young skin

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Area of Science:

  • Dermatology
  • Biochemistry
  • Immunology

Background:

  • Skin reactivity to antigens changes markedly during the transition from infancy to childhood.
  • Previous studies noted infants' lack of reaction to bacterial toxins, with reactivity increasing with age.

Purpose of the Study:

  • To investigate the correlation between changes in skin proteolytic ferments and altered skin reactivity from infancy to childhood.
  • To explore the role of specific enzymes like protease and peptidase in skin's response to antigens.

Main Methods:

  • Comparative analysis of skin ferment activity (protease, peptidase, lipase) in fetal/young vs. adult skin.
  • Review of existing literature on skin reactivity to various antigens (bacterial toxins, Witte's peptone, colon bacilli, tuberculin).

Main Results:

  • Fetal skin protease shows limited autolysis, unlike adult skin protease, suggesting a predominant synthetic function.
  • Young skin possesses significant peptidase activity, capable of digesting partially hydrolyzed proteins like tuberculin.
  • Adult skin appears to lack peptidase activity, potentially hindering antigen breakdown.

Conclusions:

  • Altered skin reactivity after infancy is strongly correlated with changes in skin's proteolytic ferment composition.
  • Peptidase activity in young skin may facilitate rapid digestion and detoxification of certain antigens.
  • Further research is needed to elucidate the precise role of these ferments in specific skin reactions and resistance to infections like tuberculosis.