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Sri Handayani
FMIPA UNY
Decision Sciences, Operations Research & Management

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ANTIOXIDANT ACTIVITY AND ANTIKANKER DERIVATING BENZALASETON Sri Handayani; Retno Arianingrum; Winarto Haryadi
Jurnal Penelitian Saintek Vol 18, No 1: April 2013
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7888.878 KB) | DOI: 10.21831/jps.v18i1.1838

Abstract

Modification of vanillin structure to vanililacetone and divanililaseton and its activity test as antioxidant and anticancer have been done. The structural modification is carried out by condensation of the crosslinked aldol in an alkaline atmosphere with the aqueous ethanol solvent for 3 hours at 10 ° C. The antioxidant activity test on the synthesis compound was done by deoxyribose degradation method, while the anticancer activity test was done by MTT method. The results of antioxidant activity test show that the divanililaseton with IC50 is 873 ug / ml. more active than vanililacetone with IC50 of 11,765 ug / ml .. IC50 data for anticancer activity against cancer cell HeLa vanilinaseton and divanilinaseton respectively of 51.68 and 10.26 ug / ml. These results show that both compounds are very toxic to HeLa cancer cells.
EFFECT OF RATIO VARIATION Mg / AL IN SYNTHESIS OF HYDROTALSIT WITH HYDROTHERMAL COPRECIPITATION METHOD Sri Handayani; Cahyorini Kusumawardani; Kun Sri Budiasih
Jurnal Penelitian Saintek Vol 19, No 1: April 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1654.376 KB) | DOI: 10.21831/jps.v19i1.2333

Abstract

Catalyst are divided into two kinds, homogeneous and heterogeneous catalysts. The catalys tthat constantly developed isa heterogeneous catalyst because could  be separated easily and reuseable. The purpose of this research were synthesis and characterization of hydrotalcite Mg/Al as a heterogeneous catalyst which can be use din the aldol condensation reaction. Synthesis hydrotalcite was conducted by hydrothermal coprecipitation method. Synthesis performed with variations mol Mg/Alat a temperature hydrothermal 1000C for 15 hours. Hydrotalcite as a heterogeneouscatalyst preparation was done by calcinationat 4000C. Characterization of synthesized hydrotalcyte was performed by FTIR to identified functional group and XRD analysis to characteriz edits structure. The results showed that the optimum conditions for the synthesized hydrotalcite was obtained atmole ratio Mg/Al3:1.   
INFLUENCE OF CALCULATION TEMPERATURE TO HIDROTALSIT Mg / Al WHICH IS DISINTESTED THROUGH UNSECUAL METHOD OF PRESIPITATION Hasan Adidarma; Sri Handayani; Cahyorini Kusumawardani; Kun Sri Budiasih
Jurnal Penelitian Saintek Vol 19, No 2: Oktober 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (482.687 KB) | DOI: 10.21831/jps.v19i2.3502

Abstract

This research aims to determine the effect of calcination temperature variation from 200°C to 500°C on the Mg/Al hydrotalcite structure. Mg/Al hydrotalcite has been synthesized via a low supersarturated precipitation method with hydrothermal treatment, using Mg(NO3 )2 .6H2 O and Al(NO3 )3 .9H2 O as the raw materials, and base solution of NaOH and Na2 CO3 as the precipitators. Mg/Al hydrotalcite compound synthesized before and after calcination were characterized using fourier transform infrared (FTIR) and X-ray diffractometer (XRD). The results of FTIR and XRD data analysis showed that the calcination of hydrotalcite of Mg/Al at 200o C did not changed the structure of hydrotalcite compounds, calcination at temperatures 300-400o C showed that structure of hydrotalcite compound starts to change form a mixture of magnesium oxide and aluminum, and calcination at 500°C showed that the crystal structure of Mg/Al hydrotalcite has broken to form a mixture of metal oxides, namely MgO (phericlase) with a little mixture of aluminum oxide in the form of θ-Al2O3 and γ-Al2O3.
Co-Authors Cahyorini Kusumawardani Hasan Adidarma Kun Sri Budiasih Retno Arianingrum Winarto Haryadi