Judul: Kandungan Gizi Buah Tin (Ficus carica L.) Produksi Indonesia
Abstrak: The aim of this study was to identify the nutritional content of fig fruits including macro and micro nutrient, antioxidant, phytochemical, as well as the panelis preferenees. Three varieties of figs from “Sentra Tin” Bekasi were used in this study i.e Green Yordan, Purple, and Negronne. The macro nutrient content of figs were as follow (% wb) moisture 86.34, 80.57, 82.10, ash 0.75, 0.86, 0.96, protein 1.45, 1.48, 1.91, fat 0.14, 0.22, 0.56, crude fiber 2.30, 2.18, 2.77, total carbohydrate 9.01, 14.67, 11.70, and reducing sugar 1.70, 3.00, and 4.66 respectively. The micronutrient content were as follow (mg/100g) sodium content 2.11, potassium content 854.05, calcium content 104.79, and zink 1.10 respectively. Total phenolic content were as follow (mgGAE/100g) 20.28, 10.38, 28.72 respectively. The three fruits content antocyanin were as (μg/g) 61.48, 59.93, 156.29. Antioxidant of Green Yordan and Negronne are very active (mg) 29.75 and 39.75 respectively. Green Yordan is the most prefered by the panelis with percentage of acceptability 93.33%. The nutritional content of fig cultivated in Indonesia were compared with the production in other country or origin.
Keyword: nutritional composition, Indonesia, fig fruit, antioxidant

Judul: Potensi Ekstrak Daun Tin (Ficus carica L.) sebagai Antioksidan dan Aktivitas Hambatannya terhadap Proliferasi Sel Kanker HeLa
Abstrak: Fig fruit (Ficus carica L.) has antioxidant dan anticancer properties both empirically and scientific reseach. However, scientific research on the use of fig leaf as anticancer has not reported yet. This study examined the antioxidant and anticancer protency of fig leaf extract. Based on the phytochemicals test, simplicia of fig leaf contains flavonoids, tannins, steroids and alkaloids. Flavonoids, tannins, steroids of fig leaf were extracted by maceration technique using suitable solvent. The extracts were tested by 1,1-diphenyl-2-picrylhydrazyl antioxidant method and brine shrimp lethality test toxicity method. Flavonoid extract showed highest antioxidant activity with IC50 150 mg/L, while the LC50 for toxicity tests was 191.43 ppm. Flavonoids extract of fig leaf was fractionated using preparative thin layer chromatography and obtained seven fractions.Proliferation inhibition test against HeLa cancer cell by 3-[4,5-dimethylthiazol-2yl]-2,5-diphenyl tetrazolium bromide method showed the most active fraction was fraction F7 which inhibit 57.18 % proliferation of HeLa cancer cells at concentrations of 800 ppm. Based on the identification using ultraviolet spectrophotometer and fourier transform infrared, F7 fraction suspected to contain isoflavones or flavones compounds.
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Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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