Applications with keyword: Rapid screening

Application 1028

The SpinChem® MagRBR ECR screening kit, pre-packed with Purolite® Lifetech™ resins, was used to screen six different enzyme carrier resins in parallel for the immobilization of lipase CalB. Easy sampling and monitoring of the process, together with effortless handling, established the MagRBR as a time and labour efficient screening device.

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    Conditions: The enzyme solution was prepared for each type of resin according to the protocols outlined in the SpinChem guidelines for enzyme immobilization (available at www.spinchem.com/support). Each MagRBR contained 0.5 mL of ECR carrier resin, and was spun in enzyme supernatant at 500 rpm for 24 h. To monitor the immobilization process, enzymatic activity in the supernatant was measured at five points during a 24 h timespan to determine the amount of residual enzyme in the solution. The enzymatic activity was determined using a lipase activity test based on the transformation of p-nitrophenylbutyrate to p-nitrophenol and butyric acid. The reaction was quantified by the use of a spectrometer through an increase in absorbance at 450 nm due to the conversion into the products.

Application 1027

Six different immobilized lipases were screened in parallel for the esterification of lauric acid into propyl laurate using the pre-packed SpinChem® MagRBR Lipase screening kit. The process proved fast and simple, as efficient sampling and monitoring of the process was achieved without filtration steps, by keeping the immobilized catalyst confined inside the MagRBR.

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    Conditions: Six MagRBRs, each packed with 0.5 mL of one of the immobilized enzymes, were spun in parallel on a six-position magnetic plate at 500 rpm for 1 h in preheated (60°C) substrate solution containing lauric acid (8.01 g, 40 mmol/vial), 1-propanol (2.4 g, 40 mmol/vial), and water (0.32 g, 18 mmol/vial). Samples were collected at 0, 10, 20, 30 and 60 min. Analysis of the propyl laurate product was done using GC-FID after 1:50 dilution in heptane containing internal standards (tetradecane). Formation of propyl laurate over time for esterification reactions catalysed by immobilized lipases CalB (lipase B from Candida antarctica), CalA (lipase A from Candida antarctica), TL (lipase from Thermomyces lanuginosa), RM (lipase from Rhizomucor miehei), CR (lipase from Candida rugosa) and PS (lipase from Pseudomonas cepacia).

Application 9002

The stable reaction environment in the EasyMax™ 102 Advanced synthesis workstation and the high flow rates through the SpinChem® RBR allowed for quick and convenient screening of different immobilized lipases to find the enzyme most suitable for further reaction optimization.

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    Conditions: A SpinChem® S2 RBR fitted with cartridges (4×2 mL) containing one enzyme at a time from Purolite® Lifetech™ lipase kit, was rotated at 500 rpm in a preheated (60 °C) substrate solution containing lauric acid (84.1 g), 1-propanol (31.5 mL) and water (3.36 mL). Analysis of propyl laurate product was accomplished by GC-FID after 1:50 dilution in heptane containing internal standard (tetradecane). Reactions were repeated twice.

Application 1023

Poster describing the screening of resins with immobilized enzymes for esterification reactions. The screening was performed with prepacked cartridges inside a SpinChem® rotating bed reactor (RBR) and compared to parallel screening with prototype disposable magnetic RBR (MagRBR) in 10 mL volume. Both approaches were very quick, required minimum preparation and no filtration. Up-scaled processes enabled quick enzyme recycling, opening for the possibility of semi-continuous processes with attractive production economy.

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    Conditions: This poster contains data from several reactions with immobilized enzymes performed at different conditions. The details of each reaction are displayed under each figure in the poster. This poster was presented at BioTrans2017 - the 13th international symposium on biocatalysis and biotransformations, in Budapest, Hungary, the 9th to 13th of July, 2017.