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Anton Rahmadi

Jurusan Teknologi Hasil Pertanian, Fakultas Pertanian, Universitas Mulawarman, Samarinda

Author-ID : 2464155

Agriculture, Biological Sciences & Forestry Industrial & Manufacturing Engineering

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KARAKTERISTIK FISIKOKIMIA DAN ANTIBAKTERI VIRGIN COCONUT OIL HASIL FERMENTASI BAKTERI ASAM LAKTAT [Physicochemical and Antibacterial Characteristics of Virgin Coconut Oil Fermented with Lactic Acid Bacteria] Anton Rahmadi; Ipnatul Abdiah; Maya Dewi Sukarno; Titin Purnaningsih
Jurnal Teknologi dan Industri Pangan Vol. 24 No. 2 (2013): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

Destabilization of oil-water emulsion in coconut milk, in the production of virgin coconut oil (VCO), can be accelerated with the utilization of lactic acid bacteria fermentation. This research was aimed to determine physicochemical and antibacterial characteristics of VCO from coconut hybrid variety fermented with L. casei of Yakult® and two isolates of L. plantarum from mandai (traditionally fermented Artocarpus campeden) and coconut water. The observed physicochemical of VCO included yield, specific gravity, moisture content, saponification value, peroxide value, and free fatty acid. The antibacterial activity was subjected to the well diffusion method against E. coli and S. aureus with chloramphenicol as the positive control. L. casei yielded the best VCO-BAL at 34.5% (v/v), while L. plantarum from mandai and coconut water yielded 29.5% (v/v) and 25.3% (v/v), respectively. VCO-BAL from L. casei had the lightest specific gravity of 0.84±0.04 g.mL-1. Average of measured moisture contents (0.03-0.05%), saponification values (161.3-163.6), peroxide values (0.53-0.86), and free fatty acids (0.11-0.12%) of the three VCO-BALs were not significantly (p>0.05) different with respect to control. VCO-BAL produced from L. plantarum of coconut water did not exhibit better antibacterial activity compared to control. VCO-BAL from L. casei demonstrated highest antibacterial activity against E. coli, 6.45±0.50 mm (58.1% of positive control) and S. aureus, 5.23±0.40 mm (51.3% of positive control). It is deduced that antibacterial activity from VCO-BAL is contributed by hydrophobic bacteriocins.

PENERIMAAN PANELIS DAN SIFAT KIMIAWI EMULSI LABU KUNING DAN FRAKSI OLEIN SAWIT Anton Rahmadi; Yuliadini Puspita; Sukmiyati Agustin; Miftakhur Rohmah
Jurnal Teknologi dan Industri Pangan Vol. 26 No. 2 (2015): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

This study aimed to produce functional food products with the main ingredient of pumpkin and olein fraction of red palm oil (OF-RPO). This research was conducted in two stages. The first was to analyze consumer acceptance where a Completely Randomized Design was used with one factor. The factor was the composition of pumpkin and OF-RPO levelled as follow: 100:0, 95:5, 90:10, 85:15, 80:20, and 0:100 (v/v). In the second stage, analyses of carotenoids using HPLC, FFA, pH, vitamin C, and peroxide values were carried out on selected formula (mixture of pumpkin and OF-RPO), formula with 100 mL of pumpkin, formula with 100 mL of OF-RPO, and negative control (without pumpkin and OF-RPO), before and after the storage period of two months, except for HPLC analysis. The best formula based on acceptance test was a composition of 90 mL pumpkin and 10 mL OF-RPO was further diluted 1:4 (v/v). Characteristics of the product were sweet, sour, not bitter, not grassy, and not rancid. The emulsion product contains trans-β-carotene at 141.65±0.47 mg/L, equivalent to 237 UI activity of vitamin A/mL. The content of trans-β-carotene was found at the highest (341.83 mg/L) from the pumpkin juice, while the OF-RPO had the lowest trans-β-carotene content (41.2 mg/L). Product was acidic with a pH of 3.6±0.1 and with vitamin C content of 13.2±1.2 mg/100 g of product. Acidity and vitamin C levels tended to remain stable during the storage period for two months. Peroxide value of the emulsion product was at 0.8 mEq oxygen/kg. The FFAs were in the range of 1.59 to 1.73% and they also did not change significantly after storage for two months.

ANALISIS PROKSIMAT, SENYAWA FENOLIK, SIFAT ANTIOKSIDAN DAN ANTIBAKTERI KULIT BUAH Lepisanthes alata Anton Rahmadi; Yuliadini Puspita; Desy Nursayekti; Ira Sintia Sinaga; Rica Oktalina; Herry Setiawan; Wiwit Murdianto
Jurnal Teknologi dan Industri Pangan Vol. 27 No. 2 (2016): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

Bengalun (Lepisanthes alata) is a rare and under-reported fruit native from the forests of Borneo. This fruit is non-seasonal with a thick skin and crimson color, therefore shows potential to be used as raw material for herbal tea. This research was conducted in three phases, namely: (1) to report proximate portions of seed, flesh and skin of the fruit, (2) to find the best combination of time and temperature of fruit skin drying, and (3) to explore the potential antioxidant and antibacterial capacity of fruit skin extracts produced in step (2). Proximate analysis carried out following oven-drying (60°C, 12 hours) and sun-drying (8 hours). Combination of oven temperature (40, 50, 60°C) and time (8,10,12 hours) was given to find the best drying treatment in terms of vitamin C, total phenols and anthocyanins. Anthocyanins levels approached qualitatively by red color absorbance (l=545 nm). The antioxidative capacity was approached with DPPH assay. Inhibition zones were measured against Staphylococcus aureus and Escherichia coli. Best drying treatment was at 60°C for 8 hours with moisture content of 6.73±0.18%, vitamin C of 76.9±3 mg/100 g, total phenols of 1112±8 mg GAE/kg, and red color absorbance of 0.259±0.060. The average IC50 antioxidant activity for the fruit skin extracts was 252.83±1.38 ppm. Ethanolic extract produced inhibition zones from 10.76% (1.0 mg extract/50 mL) to 22.77% (1.5 mg extract/50 mL), when compared to the positive control. Aquadest extract produced inhibition zones ranging from 7.99% (0.5 mg/50 mL) to 11.00% (1.5 mg/50 mL). N-hexane extracts showed no antibacterial activity.

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