Figure 3. Decrease in the acid number of cottonseed oil with free and immobilized lipase
Immobilized lipase is able to carry out the reaction
of addition of FFA to mono- and diglyceride molecules
with the formation of triglycerides, which leads to a de-
crease in the acid number of cottonseed oil. In this case,
a decrease in the acid number of the oil begins after 90-
100 minutes of incubation with immobilized lipases. the
content of free fatty acids of cottonseed oil with immo-
bilized lipase decreases the acid number of the oil by 60-
70%.
Thus, the data obtained allow us to conclude that by
processing cottonseed oil with immobilized lipases, it is
possible to carry out the process of neutralizing cotton-
seed oil. This will lead to a decrease in the acid number
of cottonseed oil. In this case, the state of the enzyme
plays a significant role. Lipases immobilized on hydro-
phobic surfaces have higher activity and stability due to
better orientation of the active center of the enzyme and
substrate.
Literature:
1. Latif S., Anwar F., Ashraf M. Characterization of enzyme-assisted cottonseed oil by cold pressing // J Food Lipid. -
2007. –V.14. -№4.-Р.424-436.
2. Bezborodov A.M., Zagustina N.A. Lipases in catalysis reactions in organic synthesis // Prikl. and microbiol. -2014.
-T.50. -No 4. -С.347-373.
3. Guidelines for the technology of obtaining and processing vegetable oils and fats / Under. edited by A.G. Sergeeva,
-L .: VNIIZh. -1974. -Volume1, -580 p.
4. Davydova E.M., Petrovichev V.A. Practical experience of using enzyme technology // Oil and fat industry -2002. -
Number 3. -S. 24-25.
5. Abd El-Salam A.S.M., Doheim M.A., Sitohy MZ, Ramadan M.F. Deacidification of High-acid Olive Oil // J Food
Process Technol 2011, S5-001, p. 1-7.
6. Khasanov Kh.T., Davranov K., Rakhimov M.M. The state of lipases of fungi Rhizopus microsporus, Penicillium sp.
and Oospora lactis in the boundary layers of water – solid phase, factors affecting the catalytic properties of enzymes.
Applied Biochemistry and Microbiology, 2015, Volume 51, No. 5, P.511-519.
7. Gulomova K., Ziomek E., Schrag J.D., Davranov K., Cygler M. // Lipids. 1996. V. 31. No. 4. P. 379-384.
№ 5 (86)
май, 2021 г.
78
8. Anderson M.M., McCarty R.E. Rapid and sensitive assay for free fatty acids using rhodamine 6G // Anal. Biochem.,
1972, v. 45, p. 260-270.
9. A.C. 1510859. A method of obtaining a sorbent for immobilization of lipolytic enzymes // Khasanov Kh.T.,
Rakhimov M.M., Yakubov I.T., Kas'yanov S.P., Latyshev N.A., Epshtein L.M., Akulin V.N. , 1989, BI 15.
10. Neklyudov A.D., Ivankin A.N. Biochemical processing of fats and oils into new lipid products with improved
biological and physicochemical properties // Applied Biochemistry. and microbiol. -2002. -T. 38.- S.469-481.
Do'stlaringiz bilan baham: |