Buku ini menguraikan tentang pemanfaatan pasir besi dalam proses pembuatan kitosan magnetik secara mendalam dari tahap pembuatan sampai pengkajiannya lebih lanjut
Chitosan-cellulose composite beads had been prepared using cellulose isolated from sugarcane bagasse. Sugarcane bagasse was hydrolyzed with H2SO4 with various concentrations (30, 40, and 50%). Cellulose obtained was characterized using Fourier Transform Infrared (FTIR), X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM). FTIR analysis results inform the existence of typical functional groups of cellulose in the sample. XRD patterns show H2SO4 concentration on the hydrolysis process influence the crystallinity of cellulose. Cellulose was used as a filler in the preparation of chitosan-cellulose composite beads. The results show that cellulose decrease the crystallinity of chitosan.
Jamu (herbal medicine) is a traditional Indonesian medicine used to nourish, treat, and restore of health, as well as for beauty and fitness. A healthy Jamu is safe when consumed and free from chemicals (in Indonesia it’s called BKO). BKO is a medicinal chemical compound which is intentionally added in jamu (herbal medicine), which aims to increase the accelerate effects of Jamu or herbal medicine from the usual. The aims of this study are to extract, isolate, identify and elucidate the structure of the BKO of sildenafil and it’s derivatives in two herbal preparations circulating in the city of Banda Aceh. Extraction, isolation and identification of sildenafil BKO and its derivatives in jamu were done by using column chromatography (CC) and thin layer chromatography (TLC) meanwhile, the structure elucidation of sildenafil and it’s derivatives were done by Fourier-Transform Infra-Red (FT-IR) and liquid chromatography/mass spectroscopy (LC/MS/MS). The results of extraction, isolation and identification with a solvent ethyl acetate: methanol: ammonium hydroxide (25%) (100: 15: 1.5 v/v showed that two jamu circulating in Banda Aceh positively contained BKO sildenafil derivatives, namely thiosildenafil. The FT-IR analysis showed a strong absorption of thiocarbonyl (C=S) group at 1288-1242 cm-1, which is a typical uptake of the thiosildenafil compound. The Spectroscopy LC/MS/MS analysis using electron spray ionization (ESI-MS/MS) showed that the isolate have a similar spectra with thiosildenafil compound [TSLD+H]+ at 491 m/z and [TSLD+Na]+ at 513 m/z and other derivate of thiosildenafil, namely propoxyphenylhydroxylethylthiosildenafil [PHTSLD+H]+ at 533 m/z.
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