There is a widespread interest in developing methods to recover homogeneous catalysts, particularly chiral catalysts, from a reaction mixture. The impetus to recover and reuse homogeneous catalysts stems not only from an economic standpoint but also from the need to eliminate contamination of the transition metal catalyst in the product and in the waste streams. The challenge is to recover the ...

In this study, it was aimed to compare the antioxidant properties of extracts obtained from extraction olive leaves in Hatay province prepared with different solvents. For purpose, were extracted using pure methyl alcohol soxhlet and also by maceration 60% ethanol, 70% methanol, 90% acetone (v/v) distilled water. Total Flavonoid Content (TFC), Phenolic (TPC), Ferric Antioxidant Reducing Power (...

Daun Psidium guajava adalah bahan baku alami yang mengandung senyawa bioaktif, salah satunya tanin. Tanin digunakan pada berbagai industri seperti tekstil, farmasi, kosmetik, dan makanan. Penelitian ini bertujuan untuk mempelajari pengaruh waktu ekstraksi rasio solid-liquid terhadap kandungan tanin ekstrak daun guajava. segar kering diekstraksi dengan etanol perbandingan 1/20 1/60 (b/v). Temper...

We tested a wet extraction method for lipid extraction from Euglena gracilis water slurry at 0.51 MPa and 20 °C using liquefied dimethyl ether (DME). The yields, proximate analyses, elemental composition, and molecular weight distribution properties of the extracts from E. gracilis and the remaining residues obtained by DME extraction were compared with those of the extracts obtained by hexane ...