Integrated co-cultivation and subsequent esterification: Harnessing Saccharomyces cerevisiae and Clostridium tyrobutyricum for streamlined ester production.

The rising demand for natural products is accelerating research into sustainable methods for producing bio-based flavourings like ethyl butyrate. In this study, ethyl butyrate was successfully produced through the enzymatic esterification of butyric acid and ethanol, which were derived from the co-cultivation of Clostridium tyrobutyricum and Saccharomyces cerevisiae. Initial monoculture experiments with both strains were performed to investigate compromised fermentation conditions for co-cultivation.

Portuino-A Novel Portable Low-Cost Arduino-Based Photo- and Fluorimeter.

A novel portable low-cost Arduino-controlled photo- and fluorimeter for on-site measurements has been developed. The device uses LEDs as a light source and a phototransistor as a light sensor. The circuit is based on the discharge of a capacitor with the photocurrent from the phototransistor.

Smartphone-based optical analysis systems.

During the past few decades, there has been a growing trend towards the use of smartphone-based analysis systems. This is mainly due to its ubiquity, its increasing computing capacity, its relatively low cost and the ability to acquire and process data at the same time. Furthermore, there are many sensors integrated into a smartphone, for example a complementary metal-oxide semiconductor (CMOS) sensor.

Co-cultivation of diazotrophic terrestrial cyanobacteria and .

Diazotrophic cyanobacteria are able to fix N from the atmosphere and release it as bioavailable nitrogen what other organisms can utilize. Thus, they could be used as living nitrogen supplier whereby the use of fertilizer could be reduced in agricultural industry what results in a decrease of laughing gas released during fertilizer production. The diazotroph cyanobacterium () was characterized in shake flasks cultivated in nitrogen-free and nitrogen-containing medium.