<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "SINTESIS SENYAWA 1,4-BIS [(2-HIDROKSI-3-METOKSI-5 FORMALDEHID-FENIL)-METIL] PIPERAZIN DARI BAHAN DASAR VANILIN DAN UJI AKTIVITASNYA SEBAGAI ZAT ANTIOKSIDAN"^^ . "A study has been conducted to synthesize 1,4-bis [(2-hydroxy-3-methoxy-5-methanalphenyl)-\r\nmethyl] piperazin using vanillin as a starting material. It was of interest to\r\ninvestigate the activity of that compound, as an antioxidant with DPPH method. The\r\nsynthesis was carried out through Mannich reaction using vanillin, formaldehida, and\r\npiperazin. The product was obtained as a white solid, melting point 245-2470C with a yield\r\nof 67.49%.\r\nCharacterization of the product by IR and 1H NMR spectrophotometry, showed the\r\nformation of methylene bridge. This indicated that the compounds synthesized was 1,4-bis\r\n[(2-hydroxy-3-methoxy-5-methanal-phenyl)-methyl] piperazin. The test of antioxidant\r\nactivity with DPPH method showed that 1,4-bis [(2-hydroxy-3-methoxy-5-methanalphenyl)-\r\nmethyl] piperazin had antioxidant activity better than vanillin with IC50 values was\r\n0.661 mM while vanillin was 3.158 mM.\r\nKeywords: piperazin, vanilin, antioksidant"^^ . "2012-04-01" . . "V.VIII" . "No. 1" . . "FAK. SAINTEK UIN SUNAN KALIJAGA"^^ . . . "Kaunia Jurnal Sains dan Teknologi"^^ . . . "23018550" . . . . . . . "Dkk"^^ . "PRABAWATI"^^ . "Dkk PRABAWATI"^^ . . . . . . "SINTESIS SENYAWA 1,4-BIS [(2-HIDROKSI-3-METOKSI-5 FORMALDEHID-FENIL)-METIL] PIPERAZIN DARI BAHAN DASAR VANILIN DAN UJI AKTIVITASNYA SEBAGAI ZAT ANTIOKSIDAN (Text)"^^ . . . . . "04-Kaunia-Vol.VIII-No.1-Susy-Yunita-dkk-SINTESIS-SENYAWA-14-BIS.pdf"^^ . . . "SINTESIS SENYAWA 1,4-BIS [(2-HIDROKSI-3-METOKSI-5 FORMALDEHID-FENIL)-METIL] PIPERAZIN DARI BAHAN DASAR VANILIN DAN UJI AKTIVITASNYA SEBAGAI ZAT ANTIOKSIDAN (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "SINTESIS SENYAWA 1,4-BIS [(2-HIDROKSI-3-METOKSI-5 FORMALDEHID-FENIL)-METIL] PIPERAZIN DARI BAHAN DASAR VANILIN DAN UJI AKTIVITASNYA SEBAGAI ZAT ANTIOKSIDAN (Other)"^^ . . . . . . "preview.jpg"^^ . . . "SINTESIS SENYAWA 1,4-BIS [(2-HIDROKSI-3-METOKSI-5 FORMALDEHID-FENIL)-METIL] PIPERAZIN DARI BAHAN DASAR VANILIN DAN UJI AKTIVITASNYA SEBAGAI ZAT ANTIOKSIDAN (Other)"^^ . . . . . . "medium.jpg"^^ . . . "SINTESIS SENYAWA 1,4-BIS [(2-HIDROKSI-3-METOKSI-5 FORMALDEHID-FENIL)-METIL] PIPERAZIN DARI BAHAN DASAR VANILIN DAN UJI AKTIVITASNYA SEBAGAI ZAT ANTIOKSIDAN (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #18711 \n\nSINTESIS SENYAWA 1,4-BIS [(2-HIDROKSI-3-METOKSI-5 FORMALDEHID-FENIL)-METIL] PIPERAZIN DARI BAHAN DASAR VANILIN DAN UJI AKTIVITASNYA SEBAGAI ZAT ANTIOKSIDAN\n\n" . "text/html" . . . "Kaunia Jurnal" . .