Related Experiment Video
Updated: Jan 30, 2026

Preparation of High-Quality Fermented Fish Product
Published on: August 23, 2019
Study the influence of culture conditions on rennin production by Rhizomucor miehei using solid-state fermentations
Houthail Alahmad Aljammas1, Hassan Al Fathi1, Walid Alkhalaf1
1Department of Food Science, Agriculture Engineering Faculty, Al-Furat University, Deirazzor, Syria.
Abstract:
Investigations were conducted on the production of Rennin enzyme from the fungi Rhizomucor miehei 3420 NRRL using Solid-State fermentation. Wheat bran was used as a substrate. The influence of moisture content, incubation temperature, and the initial pH of fermentation medium were studied. The protein content, milk clotting activity (MCA), specific activity, proteolytic activity (PA), and (MCA/PA) ratio of the extracted enzyme were calculated after 4 days of incubation to evaluate the quality of the enzyme. The results showed that the optimal conditions for production were as follows: incubation temperature of 40 °C, moisture content of 60%, and pH of (3). Under these conditions, a production process of Rennin enzyme was established, and the values of protein content, milk clotting activity, specific activity, proteolytic activity, and (MCA/PA) ratio reached to 4 mg/mL, 600 SU/mL, 150 SU/mg, 45 PU/mL, 13.3 respectively.
Related Concept Videos
Fermentation
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
Cultural Influences on Personality
Molecular and Ionic Solids
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Metallic Solids
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
Structures of Solids
Biopharmaceutical Factors Influencing Drug Product Design: Overview

