Prof. Chien-Yen Chen z National Chung Cheng University

Prof. Chien-Yen Chen  z National Chung Cheng University (Taiwan) měl dnes od 14 hodin v Uhelně v rámci své návštěvy našeho ústavu přednášku o biosurfaktantech.

Title: A unique biosurfactant Surfactin,  its properties and application

The application of a high throughput analysis method for the screening of potential biosurfactants from natural sources has been developed. The method described here is based on the effect of meniscus shape on the image of a grid viewed through the wells of a 96-well plate. Methods of producing the lipopeptide biosurfactant, surfactin,  from cultures of Bacillus subtilis (BBK006) have been investigated. A reactor with integrated foam fractionation was designed and used in batch and continuous modes. Neutron reflectometry has been used to study the structure of the biosurfactant, surfactin, at the air/water and at the hydrophobic solid/water interfaces. The study of photoluminescence of single-walled carbon nanotubes wrapped with surfactin was carried out. Synthesis of  silver and gold nanoparticles using a borohydrate reduction was performed at three pH levels and two different temperatures in the presence of surfactin that was used to stabilize the formation of silver and god nanoparticles. Synthesis of brushite particles in reverse microemulsions of the biosurfactant surfactin was investigated. A novel BMSN (biologically synthesized mesoporoussilica nanoparticles) material was prepared using abacteria-mediated biosurfactant. Removal of fluoride from water was stydied using the bacterial surfactin mediated novel hydroxyapatite nanoparticle. Low-temperature synthesis of rose-like ZnO nanostructures was sunthesized using surfactin and their photocatalytic activity  has been checked. Removal of mercury by foam fractionation was also carried our using surfactin, a biosurfactant. This report describes the use of a renewable, environmentally compatible, biodegradable surfactant as a stabilizing agent for the synthesis of nanoparticles and their application for evrinmenal issues.