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KAJIAN PEROVSKITE LA0,73CA0,27MN1-XCUXO3 DENGAN 0 Gunanto, Y. E.; Sinaga, K.; Purwanto, A.; Kurniawan, B.; Poertadji, S.; Steven, E.; Brooks, J. S.
Jurnal Spektra Vol 15, No 1 (2014): Spektra: Jurnal Fisika dan Aplikasinya
Publisher : Jurnal Spektra

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Abstract

We have performed the synthesis and characterization of materials La0.73Ca0.27Mn1-xCuxO3 for 0 <x< 0.19 using  neutron scattering diffraction (HRPD) and SQUID.All the samples are already in phase with the crystal structure  orthorombic and space group P nma. Parameters of the Mn-O bond length obtained from the charactyerization HRPD. From  the parameters of Mn-O bond length can be determined the value of Jahn-Teller distortion. The greater x will result in an  average radius of position B (<rB>) increasing and the tolerance factor t decreasing. From the characterization of the SQUID  was found that the maximum value of conductivity for Cu-doped samples will be lower when compare to the sample without  doping, except for Cu=0.10. If the value of the conductivity is getting smaller, the activation energy will be higher. Keywords: Jahn-Teller distortion, factor tolerance, conductivity, activation energy
REDUCTION OF BENZO (A) PYRENE IN CHARCOAL GRILLED DUCK MEAT BY MARINATING WITH ANDALIMAN (Zanthoxylum acanthopodium, DC) FRUIT JUICE Sinaga, K.; Legowo, A. M.; Suprijatna, E.; Pramono, Y. B.
Journal of the Indonesian Tropical Animal Agriculture Vol 41, No 4 (2016): December
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.41.4.204-208

Abstract

The effect of andaliman fruit juice marination on the amounts of benzo (a) pyrene in charcoal grilled duck meat were investigated in this research. Completely randomized design was used to determine the effect of 4 treatments of andaliman fruit juice concentration (w/v). Twenty four duck meat samples were devided into 4 treatment groups, those were 0% (I), 10% (II), 20% (III) and 30% (IV). Each group consisted of 6 samples. Total Fat, Tio Barbituric Acid (TBA) value and antioxidant activity were measured from all samples. The result showed there was no effect on total fat of duck meat. Antioxidant activity was 18.60 %, 18.06 %, 19.99 % and 7.54 % for andaliman fruit juice of 10%, 20%, 30% and 0%, respectively. TBA value was 1.03 %, 0.89 %, 0.09 % and 0.10 % for treatment II, III, IV and I, respectively. Antioxidant activity of andaliman fruit was decreased the amounts of Benzo (a) pyrene of duckmeat. Charcoal duck meat without andaliman fruit produced 787 ng, it was higher than charcoal duck meat with andaliman fruit (295 ng).