Synthesis and characterization of TiO2 films sensitized with chlorophyll and metal-chlorophyll complex (M=Zn2+, Co2+) were carried out. Chlorophyll isolated from cassava leaves shows absorption peaks on the UV-Vis spectra in the Soret band area (415 nm) and Q band area (665 nm). The metal-chlorophyll complex was prepared from the reaction of the isolated chlorophyll and ZnCl2 (for Zn2+-chlorophyll); CoCl2.6H2O (for Co2+-chlorophyll) under reflux condition at 65 ºC with a mole ratio of 1:1. The UV-Vis spectra of the isolated products showed a hypsochromic shift to 410 nm and 660 nm for Zn2+-chlorophyll whereas the spectrum of the Co2+-chlorophyll product demonstrated the shifts to 403 nm and 661 nm. These hypsochromic shifts are proposed to be a metal-to-ligand charge transfer (MLCT) transition as a result of chlorophyll metalation. The FTIR spectra of chlorophyll and metal-chlorophyll complexes have a similar pattern despite changes in the absorption of vibrational energy in several functional groups. The absorption of the C=N group shifted from 1372 cm-1 to 1368 cm-1 for both of the complexes, the C=C group of aromatic shifted from 1451 cm-1 to 1447 cm-1 (Zn2+-chlorophyll) and from 1451 cm-1 to 1445 cm-1 (Co2+-chlorophyll), and the C=O group of ketones shifted from 1627 cm-1 to 1645 cm-1 (Zn2+-chlorophyll) and from 1627 cm-1 to 1646 cm-1 (Co2+-chlorophyll). The shift pattern of the absorption peaks on the FTIR spectra indicates the coordination of metal ions towards the N atom in the pyrrole ring in the porphyrin structure of the chlorophyll. When the isolated chlorophyll as well as the chlorphyll complexes was sensitized on the surface of TiO2, variation of bandgap energy was observed. The calculation using the Tauc Plot method resulted in the bandgap energy of films of TiO2 at 3.20 eV, TiO2/chlorophyll at 2.97 eV, TiO2/Zn2+-chlorophyll at 2.87 eV, and TiO2/Co2+-chlorophyll at 2.90 eV

Eggplant (Solanum melongena L.) is a plant that contains antioxidants and potentially as a cancer drug. This study was conducted to identify the cytotoxic activity of secondary metabolite compound against T47D breast cancer cells based on the IC50 value. Isolation Eggplant peel was carried out in several steps, such as maceration, partition, and chromatography.The result 1H-NMR (DMSO, 500 MHz) analysis optained a chemical shift of δ 0.86 ppm (1H,m), δ 1.44 ppm (1H,s), δ 1.34 ppm (2H, brs), δ 1.62 ppm (1H, m), δ 3.31 ppm (4H, brs), δ 3.73 ppm (1H, t), dan δ 7.69 ppm (1H,m). Based on the chemical shift 3 ' isolate tends to have similarities to the aglycon pregnan compound steroids. The results showed that the dichloromethane fraction obtained IC50 values of 160.79 µg / mL and the isolate obtained IC50 values of 124.44 µg / mL. The IC50 value obtained by the dichloromethane fraction and isolate was classified as moderate cytotoxic so that it could be used to prevent and inhibit the growth of cancer cells.

Nutmeg (Myristica fragrans Houtt) is a medicinal plant that produces essential oils and is often used as a flavoring of food and medicine. The process of extracting essential oils from the nutmeg fruit pulp using the steam-water distillation method. The yield of essential oil obtained at 0.07765%, with a pale yellow color, the distinctive smell of nutmeg oil with a refractive index of 1.485, and a specific gravity of 0.909 g / mL and soluble in ethanol. The results of GC-MS identification showed that the essential oil of nutmeg fruit flesh contains five components, the main compound is myristicin (18.44%),α-pinene (14.2%), limonene (9.37%), γ-terpinene (7.98%) and terpinolene (7.66%). Based on the test results of anti-inflammatory activity, the value of the percentage of red blood cell stability optimum mounting to 80.21% at a concentration of 10 ug / mL, where the standard aspirin has an activity of 72.26%. These results indicate that the meat nutmeg essential oil is potential as anti-inflammatory agents.

Research on siam weed (C. odorata) essential oil from West Kalimantan has been conducted. This study aims to determine the components of Siam weed (C. odorata) essential oils and the activity of rubber tree termites, Coptotermes curvignathus Holmgren. Siam weed leaf essential oil was obtained by the steam distillation method for 6 hours and analyzed using the GC-MS method. The yield of Siam weed (C. odorata) essential oil was obtained at 0.0623% with a density of 0.901 gr / mL. The results of GC-MS analysis showed that some of the main components of the siam weed leaf (C. odorata) essential oil compound were geijerene (26.94%), germacrene (26.44%), transcaryophyllene (13.29%), and α-pinene (6.44%). The activity of essential oils on termites was used antifeedant bioassay test method with concentration 2; 4; 6; 8 and 10%. The best results for mortality are in the range of 6 to 10%, with a mortality percentage of 91.33 to 100% and an LC50 value of 2.338%. Reduction in feed paperweight of essential oils in concentration 2 to 4% is in the range 1,417 to 10,278%.