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Related Concept Videos

Chemical Agents for Microbial Control01:27

Chemical Agents for Microbial Control

Chemicals play important roles in controlling microbial growth by targeting microbial structures and functions as sanitizers, antiseptics, disinfectants, and sterilants.Alcohols are commonly used sanitizers, effectively disrupting lipid membranes, which compromises cell integrity. They are also used as antiseptics and disinfectants due to their rapid action and versatility.Phenols and their derivatives phenolics , known for denaturing proteins and disrupting cell membranes, are particularly...
Surface Membrane Barriers01:18

Surface Membrane Barriers

The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
The Skin Microbiota01:27

The Skin Microbiota

The human skin serves as a complex ecosystem inhabited by a diverse community of microorganisms, including bacteria, fungi, and viruses. This microbiome plays a critical role in maintaining skin health and defending against pathogenic invaders. The composition of microbial communities varies significantly across different regions of the body, influenced primarily by the local levels of moisture and sebum.Regional Variation in Skin MicrobiotaCutibacterium acnes predominantly colonizes sebaceous...
Biological Methods for Microbial Control01:28

Biological Methods for Microbial Control

Biological agents offer an effective means of controlling microbial growth by leveraging natural processes like predation, competition, and the secretion of antimicrobial substances.Predatory bacteria such as Bdellovibrio species target and kill pathogens like Salmonella and E. coli. They are widely used in poultry farms to control infections. Myxococcus species help combat plant-pathogenic fungi. These naturally occurring predators serve as eco-friendly alternatives to chemical pesticides and...
Hand hygiene01:23

Hand hygiene

Asepsis is the practice of preventing or breaking the chain of infection. The nurse employs aseptic techniques to prevent the spread of microorganisms and reduce the risk of diseases. Hand hygiene is the cornerstone of aseptic techniques and is classified into medical and surgical asepsis. Medical asepsis includes hand hygiene and the use of gloves. Surgical asepsis, or the sterile technique, refers to practices that render and keep objects and areas free of microorganisms.
Hand washing...
Determinants of Bacterial Pathogenicity and Virulence01:20

Determinants of Bacterial Pathogenicity and Virulence

Pathogenic bacteria employ a variety of strategies to establish infections, including the secretion of extracellular enzymes that act as potent virulence factors. These enzymes facilitate bacterial colonization of host tissues and help evade immune surveillance. By targeting structural components of host tissues and interfering with immune mechanisms, these enzymes play a pivotal role in disease progression.Extracellular Enzymes Facilitating Tissue Invasion: Several bacterial pathogens secrete...

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Related Experiment Video

Updated: Jun 26, 2026

Preparation of Keratin Hydrolysate from Chicken Feathers and Its Application in Cosmetics
08:29

Preparation of Keratin Hydrolysate from Chicken Feathers and Its Application in Cosmetics

Published on: November 27, 2017

[Microbial keratinolytic enzymes].

O V Matseliukh, L D Varbanets

    Mikrobiolohichnyi Zhurnal (Kiev, Ukraine : 1993)
    |January 15, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Microbial keratinases are enzymes that break down keratin, a tough protein. This paper reviews microorganisms capable of keratin degradation and their industrial and medical applications.

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    Published on: January 1, 2016

    Area of Science:

    • Biochemistry
    • Microbiology
    • Enzymology

    Context:

    • Keratin is a resilient structural protein found in hair, feathers, and nails.
    • Its resistance to degradation poses challenges in various biological and industrial processes.
    • Microbial enzymes offer a potential solution for keratin hydrolysis.

    Purpose:

    • To review microorganisms with keratinolytic capabilities.
    • To discuss the properties and purification of keratinase enzymes.
    • To explore the applications of keratinases in industry and medicine.

    Summary:

    • Microorganisms possess keratinolytic enzymes capable of hydrolyzing the recalcitrant keratin substrate.
    • The paper examines the diversity of keratin-degrading microbes and the biological significance of these enzymes.
    • Physical and chemical properties of keratinase preparations, along with separation and purification techniques, are detailed.

    Impact:

    • Understanding microbial keratin degradation can lead to novel biotechnological solutions.
    • Keratinase enzymes have potential applications in the feed, textile, detergent, and pharmaceutical industries.
    • This review provides insights into harnessing microbial power for keratin waste management and valorization.