Biotechnology Lecture Notes

Solid State Fermentation Technology: Examples, Advantages and Disadvantages


Solid-Substrate-Fermentation-SSF

Solid State Fermentation (SSF)
(Solid State Fermentation: Technology, Advantages and Disadvantages)

What is Solid State Fermentation (SSF)?

In Solid State Fermentation, also called Solid Substrate Fermentation or SSF, the fermentation substrate or media will be in the solid state. Here the microorganisms are grown on a solid substratum in the absence or near absence of free water. The moisture content of the substratum in SSF is usually maintained below 15%. The solid state fermentation is most commonly carried out for the production of fermented food products such as bread, fermented fish, meat, yogurt, cheese and pickles. The microbial fermentation increases the nutrient content and flavor of food products. It also increases the digestibility of foods. The cultivation of edible mushrooms on a suitable substratum is also a solid state fermentation process.

Pleurotus djamor

Mushroom Cultivation (wikipedia)

Substrates / Media in Solid State Fermentation

 

The substrates commonly used in SSF are usually very complex, heterogeneous and are insoluble in water. These substrates include cereals grains, wheat bran, lingo-cellulosic materials such as wood shavings, sawdust, molasses etc. In most of the cases, the substrate or the raw materials were undergone through a pre-treatment such as soaking, boiling in water, mechanical pre-treatment or chemical treatment. These pre-treatments increase the bioavailability of nutrients for the microbes to act on them.

Instrumentation and Growth Kinetics in Solid State Fermentation

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biological chemistry

Nucleotide Biosynthesis PPT (Synthesis of Purine and Pyrimidine PPT)


Biochemistry Power Point Presentations Free

Nucleotide Biosynthesis PPT
(Bio-synthesis of Purines and Pyrimidines PPT)

How nucleotides are synthesized in the cells? Understand the Two Pathways of nucleotide biosynthesis (1) De-novo synthesis and (2) Salvage Pathways. De-novo synthesis of purines PPT, Synthesis of IMP (precursor of Adenine and Guanine), Synthesis of Adenine and Guanine from IMP, De-novo synthesis of Pyrimidines, Synthesis of Uracil, Synthesis of Cytosine, Synthesis of Deoxy Nucleotides, Synthesis of Thymine, The Salvage pathways of Purines and Pyrimidines

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Plasma Membrane Lipids PPT


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Biochemistry of Membrane Lipids PPT
(Properties, Structure and Classification of Plasma Membrane Lipids PPT)

What are membrane lipids? What are the properties of membrane lipids? Structure of Membrane Lipids, Classification of membrane lipids, Structure of membrane lipids, Structure and properties of Glycolipids, Phospholipids, Sphingolipids, Sterols, Archaebacterial Ether Lipids, Glycero-phospholipids, Plasmalogen, Gangliosides, Galactolipids, Sulfolipids and Cardiolipin

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biological chemistry

Enzyme Substrate Specificity PPT


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Specificity of Enzyme PPT
(The Mechanism of Enzyme Substrate Specificity PPT)

What is enzyme substrate specificity? What are the importance of enzyme specificity? Classification of enzyme specificity, Different types of enzyme specificity: Bond specificity, Group specificity, Substrate specificity, Absolute Specificity, Optical or Stereo specificity, Geometrical specificity and Co-factor specificity

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biological chemistry

Regulation of Enzymatic Activity PPT


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Regulation of Enzymatic Activity PPT
(The Mechanism of Regulation of Enzyme Action PPT Download)

What are enzymes? What is enzyme regulation? What are regulatory enzymes? Which enzyme is a regulatory enzyme in a multi-step pathway? Mechanisms of enzyme regulation: Allosteric enzyme regulation: Feedback inhibition, Reversible covalent modifications, Proteolytic activation of enzymes, Feedback regulation, Regulation by Isoenzymes (isozymes).

Learn more: Lecture Note in Regulation of Enzymatic Activity

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