Maranatha Christian University

About: Maranatha Christian University is a education organization based out in Bandung, Indonesia. It is known for research contribution in the topics: Mesenchymal stem cell & Source code. The organization has 634 authors who have published 668 publications receiving 2522 citations.

Pengaruh Locus of Control, Financial Knowledge, Income Terhadap Financial Management Behavior

Abstract: The aim of this study is to test impact locus of control, financial knowledge and income to financial management behavior. Total respondents are 130 respondents. Using regression analysis, the result shows financial knowledge impact financial management behavior but locus of control and personal income don’t impact financial management behavior. Because the sample of this research is student and almost of them have income from their parents.

Antioxidant and Anti Aging Assays of Oryza Sativa Extracts, Vanillin and Coumaric Acid

Abstract: Aging is a natural process in humans as accumulation of oxygen-derived free radicals which leads to the activation of hyaluronidase, collagenase and elastase, that can further contribute to cellular and tissue damage. Bioactive compounds from plants have been used as antioxidant that might inhibit aging processes as well. This study aimed to determine antioxidant and anti aging properties of Oryza sativa Extract (OSE), and its compounds, vanillin and coumaric acid. The phytochemical analysis of OSE was performed with Farnsworth modified method. Antioxidant activities were performed by measurement of 2,2-diphenyl 1-pichylhydazyl (DPPH) free radical scavenger, Ferric Reducing Antioxidant Power (FRAP), and 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) reducing activity, while anti aging assay were observed through inhibitory of elastase, collagenase, and hyaluronidase activities. Phytochemical analysis showed the presence of terpenoids and saponins in high level. OSE showed lowest DPPH activity (IC 50 = 314.51 μg/mL) compared to vanillin (IC 50 = 283 μg/mL) and coumaric acid (IC 50 = 255.69 μg/mL). In ABTS assay, OSE resulted lowest activity(IC 50 = 145.67 μg/mL), compared to vanillin (IC 50 = 4.96 μg/mL) and coumaric acid (IC 50 = 1.67 μg/mL). OSE also showed the lowest FRAP-reducing activity (21.26 μM Fe(II)/μg), compared to vanillin (35.05 μM Fe(II)/μg) and coumaric acid (48.52μM Fe(II)/μg). OSE showed the lowest collagenase, elastase, and hyaluronidase inhibitory activity (IC 50 = 816.78,107.51, and 203.13 μg/mL), compared to vanillin (IC 50 = 16.27, 14.46, 45.23 μg/mL respectively) and coumaric acid (IC 50 = 146.89, 25.38, 8.21 μg/mL respectively). In summary, OSE possess the lowest antioxidant and anti aging activities compared to vanillin and coumaric acid.

Implications for megathrust earthquakes and tsunamis from seismic gaps south of Java Indonesia

Abstract: Relocation of earthquakes recorded by the agency for meteorology, climatology and geophysics (BMKG) in Indonesia and inversions of global positioning system (GPS) data reveal clear seismic gaps to the south of the island of Java. These gaps may be related to potential sources of future megathrust earthquakes in the region. To assess the expected inundation hazard, tsunami modeling was conducted based on several scenarios involving large tsunamigenic earthquakes generated by ruptures along segments of the megathrust south of Java. The worst-case scenario, in which the two megathrust segments spanning Java rupture simultaneously, shows that tsunami heights can reach ~ 20 m and ~ 12 m on the south coast of West and East Java, respectively, with an average maximum height of 4.5 m along the entire south coast of Java. These results support recent calls for a strengthening of the existing Indonesian Tsunami Early Warning System (InaTEWS), especially in Java, the most densely populated island in Indonesia.

Antioxidant and Antiaging Assays of Hibiscus sabdariffa Extract and Its Compounds

Abstract: Skin aging is a complex biological process due to intrinsic and extrinsic factors. Free radical oxidative is one of extrinsic factors that induce activation of collagenase, elastase and hyaluronidase. Natural product from plants has been used as antioxidant and antiaging. This study aimed to evaluate antioxidant and antiaging properties of Hibiscus sabdariffa extract (HSE) and its compounds including myricetin, ascorbic acid, and β carotene. The phytochemical of H. sabdariffa was determined using modified Farnsworth method and presence of phenols, flavonoids and tannins were in moderate content, whereas triterpenoids and alkaloids were in low content. Total phenolic content performed using Folin-Ciocalteu method, was 23.85 μg GAE/mg. Quantitative analysis of myricetin, β-carotene, and ascorbic acid of HSE was performed with Ultra-High Performance Liquid Chromatography (UHPLC) that shows 78.23 μg/mg myricetin, 0.034 μg/mg β-carotene, whilst ascorbic acid was not detected. HSE has lower activity on DPPH (IC50 = 195.73 μg/mL) compared to β-carotene, the lowest in ABTS assay (IC50 = 74.58 μg/mL) and low activity in FRAP assay (46.24 μM Fe(II)/μg) compared to myricetin, β-carotene. Antiaging was measured through inhibitory activity of collagenase, elastase, and hyaluronidase. HSE had weakest collagenase inhibitory activity (IC50= 750.33 μg/mL), elastase inhibitory activity (103.83 μg/mL), hyaluronidase inhibitory activity (IC50 = 619.43 μg/mL) compared to myricetin, β-carotene, and ascorbic acid. HSE contain higher myricetin compared to β-carotene. HSE has moderate antioxidants and lowest antiaging activities. Myricetin is the most active both antioxidant and antiaging activities.