Jezik: | Angleški jezik |
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Leto izida: | 2010 |
Izvor: | Maribor |
Tipologija: | 2.11 - Diplomsko delo |
Organizacija: | UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo |
Založnik: | [N. Čurič] |
UDK: | 547.914+577.17(043.2) |
COBISS: | 14147094 |
Št. ogledov: | 4065 |
Št. prenosov: | 371 |
Ocena: | 0 (0 glasov) |
Metapodatki: |
Sekundarni jezik: | Slovenski jezik |
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Sekundarni naslov: | Imobilization of enzyme [alpha] - amylase as cross-linked enzyme aggregates (CLEA) |
Sekundarni povzetek: | This work describes the preparation of catalytically active enzyme aggregates of the enzyme α – amylase or briefly CLEA. The procedure to prepare cross-linked enzyme aggregates was devided into two major steps: precipitation of soluble or native enzyme with a suitable precipitant such as organic solvent and consequently cross-linking of enzyme aggregates with the cross-linker. Synthesis of cross-linked enzyme aggregates was conducted at a constant volume concentration of the cross-linker (glutaraldehyde, GA) 1 % (v/v) and precipitant (methanol) 90 % (v/v).In the present study, the activity of CLEA from α - amylase was determined by the reaction of hydrolysis of soluble starch. The optimal reaction conditions were found to be: concentration of proteins from α – amylase enzyme preparation γα - amylase = 6 mg/mL and concentration of protein albumin (EA) γEA = 2.5 mg/mL. The hydrolysis of starch was carrier out for 3 h. Temperature stability of cross-linked enzyme aggregates was determined after exposure of the immobilized enzyme at different temperatures for 30 min. Effect of temperature on the reaction of hydrolysis of starch with immobilized α - amylase was determined in the temperature range from 45 °C to 110 °C. The stability of free α – amylase and cross – linked enzyme aggregates was finally tested in supercritical carbon dioxide. We also tested the reusability of cross – linked enzyme aggregates in consecutive cycle of hydrolysis of starch. |
Sekundarne ključne besede: | imobilizacija;amilaza;zamreženi encimski skupki;glutaraldehid; |
URN: | URN:SI:UM: |
Vrsta dela (COBISS): | Diplomsko delo |
Komentar na gradivo: | Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo |
Strani: | 90 f. |
Ključne besede (UDK): | mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;organic chemistry;organska kemija;mathematics;natural sciences;naravoslovne vede;matematika;biological sciences in general;biologija;material bases of life;biochemistry;molecular biology;biophysics;biokemija;molekularna biologija;biofizika; |
ID: | 1011364 |