Microencapsulation of cyprosins from flowers ofCynara cardunculus L. in dehydration-rehydration liposomes

Summary Cyprosin extract from dried flowers ofCynara cardunculus L. was dissolved in two different buffers (50 mM Tris-HCl, pH 8.3 and 10 mM PBS, pH 7.4), mixed with a sonicated soybean lecithin dispersion and microencapsulated in dehydration-rehydration liposomes. Efficiency of cyprosin encapsulation was 12.1% for Tris-HCl liposomes and 12.3% for PBS liposomes. TCA-soluble N in 24 h cheese was higher when PBS liposomes were added to milk (A₂₈₀=0.604) than when Tris-HCl liposomes (A₂₈₀=0.392) or no liposomes (A₂₈₀=0.359) were added, due to the efficient delivery of cyprosin into the curd by PBS liposomes.