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Lexie P. Mamahit
Universitas Sam Ratulangi
Chemistry

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SATU SENYAWA STEROID DARI KULIT BATANG TUMBUHAN PALIASA (Kleinhovia hospita L.) ASAL SULAWESI SELATAN Gaffar, Imran; Mamahit, Lexie P.
CHEMISTRY PROGRESS Vol 3, No 1 (2010)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.3.1.2010.70

Abstract

The study aims to isolate and identify the metabolite structure of Kleinhovia hospital L. To achieve the purpose,and extraction of bark with methanol was performed. This extract was partitioned into several organic solutions:n- hexane, chloroform, and ethyl acetate. The partitioned were fractioned and purified by means of severalappropriate methods like liquid vacuum chromatography and pressure column chromatography, and meltingpoint determination. To determine the chemical structure of the isolate, a combination of several spectroscopicmethods, such as infrared (IR), nuclear magnetic resonance (NMR), and advanced NMR technique (HMQC,HMBC and COSY). Result of this research shown that one major constituent was isolated from bark: b-sitosterol.
SATU SENYAWA ASAM ORGANIK YANG DIISOLASI DARI DAUN GEDI (Abelmoschus manihot L. Medik) ASAL SULAWESI UTARA Mamahit, Lexie P.; Soekamto, Nunuk H.
CHEMISTRY PROGRESS Vol 3, No 1 (2010)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.3.1.2010.73

Abstract

This research was aimed to isolate and identify the structure of secondary metabolities from gedi leaf. In order to achieve this research aim, an extraction of the gedi leaf tissue with methanol solvent had been carried out. These extract then was partitioned in several organic solvents such as n-hexane, chloroform and ethyl acetate. Further, the resulted partition was fractionation and purifying undergoes an appropriate method like liquid and vacuum pressure chromatography and also determining the melting points. To determine the chemical structure of the isolate, a compilation of several spectroscopic methods, such as infrared (IR), 1H and 13 C nuclear magnetic resonance (NMR), techniques (HMQC, HMBC, and COSY). Results of this research shown that one major constituent was isolated from the leaf of gedi: heptadecanoid acid. 
Co-Authors Alfianz Z. Aatjin Ansye S. Tangkilisan Christine Mamuaja Imran Gaffar Lucia Cecilia Mandey M. B. Lelemboto Nunuk H. Soekamto Olivia P.M. Purukan Teltje Koapaha Thelma D. Tuju Yoan Y. Bolung