Suyatno
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PEMANFAATAN NOVEL KARYA ANAK UNTUK PEMBELAJARAN SASTRA DI SEKOLAH DASAR Suyatno,
Pendidikan Dasar Vol 11, No 1 (2010)
Publisher : Pendidikan Dasar

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SUATU SENYAWA TURUNAN CALKON DARI TUMBUHAN Suyatno, ; Nurul Hidajati, ; Khoiriyah Umami,
Matematika dan Sains Vol 16, No 1 (2009)
Publisher : Matematika dan Sains

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SENYAWA FLAVANON DARI TUMBUHAN Suyatno, ; Nurul Hidajati, ; Mahanani Tri Asri, ; Rizka Ayu Hamida,
Matematika dan Sains Vol 17, No 2 (2010)
Publisher : Matematika dan Sains

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A flavanone namely 5-hydroxy-7-methoxy flavanone (pinostrobin) had been isolated from dichloromethane extract of the leaves of the Pteriss vittata. It was gained as a pale yellow needles, m.p. 96-97 oC. The molecular structure of isolate was identified by spectroscopic methods, including UV, IR, and EIMS.A flavanone namely 5-hydroxy-7-methoxy flavanone (pinostrobin) had been isolated from dichloromethane extract of the leaves of the Pteriss vittata. It was gained as a pale yellow needles, m.p. 96-97 oC. The molecular structure of isolate was identified by spectroscopic methods, including UV, IR, and EIMS.
KINETIKA REAKSI ESTERIFIKASI n-OKTIL p-METOKSI SINAMAT (OPMS) Suyatno, ; Titik Taufikurohmah, ; Nurul Hidajati,
Matematika dan Sains Vol 18, No 2 (2011)
Publisher : Matematika dan Sains

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The aim of research was to study the chemical kinetic of esterification of ester derivided from cinnamic acid, namely octyl-p-methoxy cinnamate. It was synthesized from ethyl-p-methoxy cinnamate isolated from kencur tuber and n-octanol. Results showed that esterification of octyl-p-methoxy cinnamate proceeded through first order reaction and its activation energy was 1530 Joule/ mol.