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Frida Oesman
Jurusan Kimia, Universitas sriwijaya
Chemistry Mathematics Physics

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Journal : Jurnal Penelitian Sains

 1 
Studi Aktifitas Antioksidan Ekstrak Herba (Ocimum Sanctum L.) Frida Oesman; Setiawan Yusuf
Jurnal Penelitian Sains No 2 (1997)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (323.894 KB) | DOI: 10.56064/jps.v0i2.229

Abstract

Telah dilakukan penelitian untuk menentukan aktifitas antioksidan ekstra herba kemangi (Ocimum Sanctum L.), ekstrak herba kemangi dipersiapkan dalam 3 bentuk ekstrak yaitu ekstrak n-heksa, diklorometan dan etanol, aktifitas antioksidan ditentukan dengan menggunakan metode Feri Tiosianat. Hasil penelitian menunjukkan bahwa herba kemangi mempunyai sifat antioksidan, aktifitas yang paling kuat dihasilkan oleh ekstrak n-heksan, ekstrak etanol kurang kuat dibandingkan ekstrak n-heksan, namun lebih kuat dibanding Butilhidroksianisol (BHA), sedang ekstrak diklorometana kurang kuat. 
Studi Kandungan Kimia Ekstrak Kloroform Batang Tumbuhan Mengkelik (Gynotroches axilaris, Bl) Setiawati Yusuf; Frida Oesman
Jurnal Penelitian Sains No 7 (2000)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5387.76 KB) | DOI: 10.56064/jps.v0i7.318

Abstract

Telah dilakukan penelitian terhadap kandungan kimia fraksi kloroform ekstrak pekat etanol batang tumbuhan Mengkelik (Gynotroches axilaris, BL), ternyata dari sejumlah 223 gram serbuk halus batang tumbuhan Mengkelik kering dihasilkan 24 gram ekstrak pekat kloroform. Kristal yang dihasilkan (4,3002 g) direkristalisasi diperoleh kristal jarum yang berwarna (0,1629 g), tl 193-194° C. Uji Fitokimia tak memberikan kandungan senyawa metabolik sekunder yang ada. Spektrum UV dengan pelarut MeOH memberikan 2 puncak, yaitu pada 204,6 nm dan 284 nm. Spektrum IR memberikan puncak-puncak 3282,6 (v-OH,m), 3000-2850 (v-CH,I), puncak sekitar 1463,9 (v-CH2,m), 1386,7-1359,7 (Gem di Me).
Uji Anti Bakteri dan Identifikasi Senyawa Antibiotika yang Dihasilkan Streptomyces Sp I.A. Rivai bakti; Budi Untari; Frida Oesman; Emilia Fitriani
Jurnal Penelitian Sains No 6 (1999)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (316.499 KB) | DOI: 10.56064/jps.v0i6.245

Abstract

It has been isolated identified anti bacterium of antibiotic compunds produced by streptomyces sp. The isolation of sterptomyces sp was done from three kinds of soil on Soak area Km . 6, Palembang Municipallity using Plating Technic Spread Method produced 4 streptomyces isolate,. The test of the blocked capacity againts the whole isolates (4 isolates) with the bactery terstor showed that TL.J2 isolate from corn plant land has biggest activities. The isolates of antibiotics produced using fermentation method for TL.J2 isolates by using solvent extraction method and continued with HPLC produced 4 pure compunds. The test of the blocked capacity againts the 4 pure compunds, just STP1 which still antibacteria activities. Furthermore, the identification of STP1 using IR Spectrophotometer and UV showed that the results can be clasified into Alifaitic antibiotic consisting of unsaturated ketod alifatic function with the primer amine and hydroxy as a substiutent.
Co-Authors Budi Untari Emilia Fitriani I.A. Rivai Bakti Setiawan Yusuf Setiawati Yusuf