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Arniah Dali
Jurusan Kimia, Fakultas Sains dan Teknologi, UIN Alauddin Makassar
Chemistry

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Pengaruh Kecepatan Putar Pengadukan dan Waktu Pendiaman Terhadap Rendemen dan Kualitas Minyak Kelapa Murni (VCO) Arniah Dali; La Harimu La Harimu; LM. Cinong Simbiti
Al-Kimia Vol 3 No 1 (2015): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (843.483 KB) | DOI: 10.24252/al-kimia.v3i1.1660

Abstract

It as done a research on the influence of the rotational speed of stirring and standing time on the yield and quality virgin coconut oil (VCO). VCO is made with mechanical engineering variations stirring round and standing time. Variations in the rotational speed of stirring cream coconut milk is 372, 385, 449, 503, and 539 rpm. The results were obtained optimum rotational speed is 503 rpm with a yield 23.66 % (v/v). Variations coconut cream standing time is 6, 7, 8, 9, and 10 hours. The results  were obtained optimum standing time is 8 hours with a yield of 22.90 % (v/v), the water content of 0.17 %, acid content of 0.26 %, saponification value of 247.656 mg KOH/g of fat, and a peroxide value of 0.199 mL eq/kg.
Uji Aktivitas Antioksidan Ekstrak Metanol Daun Pecah Beling Strobilanthes Crispus Arniah Dali; Haeruddin Haeruddin; Wa Ode Yusmita Miranda; Nasriadi Dali
Al-Kimia Vol 5 No 2 (2017): December
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v5i2.3642

Abstract

The antioxidant activity test of methanol extracts of the leaves nasty shard Strobilanthes crispus has been done. This study aims to test the phytochemical and antioxidant activity of methanol extracts of the leaves nasty shard Strobilanthes crispus. The leaves nasty shard are macerated with methanol for 3x24 hours. Further methanol extract was tested phytochemically and antioxidant activity by DPPH method (1,1-Diphenyl-2-picrylhydrazil). The result of phytochemical test showed that the methanol extract of the leaves nasty shard Strobilanthes crispus contain secondary metabolites of alkaloids, flavonoids, and saponins. The result of antioxidant activity test showed that the methanol extract of the leaves nasty shard Strobilanthes crispus have antioxidant activity with IC50 of 100,363 ppm.
Co-Authors Haeruddin Haeruddin La Harimu La Harimu LM. Cinong Simbiti Nasriadi Dali Wa Ode Yusmita Miranda