Extraction of diterpenes from spent coffee grounds and encapsulation into polyvinylpyrrolidone particles using supercritical carbon dioxide

Autentikasi Cepat Kopi Spesialti Arabika Java Preanger Kultivar Typica, Sigarar Utang dan Yellow Bourbon Menggunakan Spektroskopi UV dan Metode PLS-DA

“…Panjang gelombang 285 nm di PC1 memiliki kontribusi penting dengan nilai xloadings negatif. Panjang gelombang ini berkorelasi dengan absorbans senyawa kahweol di panjang gelombang 285 nm seperti dilaporkan penelitian sebelumnya (Zhang et al, 2022). Ini menunjukkan bahwa tiga kultivar kopi arabika yang digunakan yaitu kopi arabika Typica, Sigarar Utang, dan Yellow Bourbon diduga memiliki kandungan senyawa kahweol yang lebih tinggi dibandingkan kopi robusta.…”

Generation of Highly Antioxidant Submicron Particles from Myrtus communis Leaf Extract by Supercritical Antisolvent Extraction Process

“…Some of the techniques based on SCFs are Particle form Gas-Saturated Solutions (PGSS), where the pressurized liquid serves as solute; Rapid Expansion of Supercritical Solutions (RESS), in which the fluid acts as solvent; and various anti-solvent processes, such as Supercritical Anti-Solvent (SAS), Gas Anti-Solvent (GAS) or the Aerosol Solvent Extraction System (ASES) [28]. In certain studies, supercritical antisolvent techniques have been used for the precipitation of particles from natural extracts, as in the following examples: the co-precipitation of lycopene extract using polyvinylpyrrolidone (PVP) [29], the formation of Curcuma xanthorrhiza extract microparticles [30], the encapsulation of diterpenes from spent coffee grounds [31], microparticles from Mangifera indica leaf extract together with a fluorescent marker [32], or the precipitation of Glycyrrhiza glabra [33]. In these cases, the process is known as Supercritical Antisolvent Extraction (SAE) [34].…”