Posman Sibuea
Staff Pengajar di Jurusan Teknologi Hasil Pertanian, Fakultas Pertanian Unika Santo Thomas Sumatera Utara, Medan. Pengurus PATPI Cabang Sumatera Utara J. Setiabudi 479F Medan 20132

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THE ROLE OF SURFACTANT MICELLES ON THE PARTITIONING OF ANTIOXIDANT AND THE OXIDATIVE STABILITY OF OIL-IN-WATER EMULSION Sibuea, Posman; Raharjo, Sri; Santoso, Umar; Noor, Zuheid
Jurnal Teknologi dan Industri Pangan Vol. 19 No. 1 (2008): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (324.343 KB)

Abstract

Lipid oxidation system in which the fat is dispersed as emulsion droplets is still not well understood, although a large number of food exist partially or entirely in the form of emulsions. Therefore, this study was intended to examine how surfactant micelles influence the partitioning of antioxidant and hydroperoxides and how it alter the oxidative stability of oil-in-water emulsion. To determine the ability of surfactant micelles upon the partitioning of antioxidant in oil-in-water emulsion, this type of emulsion, containing quercetin at 0, 25, 50, 75 and 100 ppm, were prepared with polyoxyethylene 100 stearyl ether (Brij 700) or polyoxyethylene sorbitan monolaurate (Tween 20) with acetate or phosphate buffer (pH 3.0 or 7.0). Structurally Birj 700 has 5 times longer polyoxyethylene groups than Tween 20. After preparation of the emulsion, surfactant micelles (0-2%) were incorporated into the continuous phase to give a final lipid concentration of 5%. Lipid oxidation rates, as determined by the formation of lipid hydroperoxides, decreased with increasing quercetin concentrations. At pH 3, the peroxide value was higher than that at pH 7. Brij 70 decreased production of lipid hydroperoxides from palm oil-in-water-emulsions compared to the emulsions stabilized by Tween 20. the result showed that solubilization of quercetin into the aqueous into the aqueous phase by Brij or Tween micelles did not alter the oxidative stability of palm oil-in-water emulsion, suggesting that surfactant micelle influenced the oxidation rate by mechanism other than antioxidant solubilization. Key word : Quercetin, surfactant micelles, and oxidative stability
KAJIAN PROSES PEMBUATAN BERAS ANALOG DARI TEPUNG KOMPOSIT DAN TEPUNG TULANG SAPI DENGAN PENAMBAHAN CARBOXYMETHYLCELLULOSE SERTA UJI HEDONIK K Sihombing, Indah; Siagian, Albiner; Sibuea, Posman
Gizi, Kesehatan Reproduksi dan Epidemiologi Vol 1, No 2 (2016): Jurnal Gizi, Kesehatan Reproduksi dan Epidemiologi
Publisher : Gizi, Kesehatan Reproduksi dan Epidemiologi

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Abstract

Rice consumption of the Indonesian population is the highest compared with other countries. Rice consumption of Indonesia's population in 2014 was 114 kg / capita / year. The high consumption of rice resulted in high imports of rice. Food diversification program being promoted Ministry of Agriculture to reduce dependency paddy rice consumption led to new innovations, namely artificial rice. The research is experimental research with experimental design used was completely randomized design. Formulation A1 (composite flour 95% and flour bone cow 5%),  A2 (composite flour 90% and flour bone cow10%), A3 (composite flour 85% and  flour bone cow 15%). Thisresearch uses the hedonictest and proximate test to determine their nutritional content. Hedonic assessment on artificial rice include colour, aroma, texture, and flavor. Hedonic assessment conducted with the 30 panelists. Analysis of data is using descriptive analysis, paired analysis of variance (Repetead ANOVATest) and Friedman Test. on the third treatment artificial rice from processing of composite flour and flour bone cow was produce artificial rice approaching rice. The results of hedonic test based on colour, aroma, texture, and flavor on the third treatment is same that is rather like criteria. The results of Repeated ANOVA test for colour and Friedman test for aroma, texture, and flavor was produced p > 0,05, it means there is no significant difference between samples on the indicator of colour, aroma, texture, and flavor. Artifial rice 3 in a dish once ate as much as 100 grams or 150 grams of rice donated 449 kcal of  total energy.         Artificial rice is highly recommended because it can meet the daily nutritional requirements of individuals and suggested an option staple food.  Keywords: artificial rice, composite flour, flour bone cow, Hedonic assessment
PENGGUNAN GUM XANTHAN PADA SUBSTITUSI PARSIAL TERIGU DENGAN TEPUNG JAGUNG DALAM PEMBUATAN ROTI [USE OF XANTHAN GUM IN PARTIAL SUBSTITUSION OF CORN FLOUR FOR WHEAT FLOUR IN BREADMAKING] Sibuea, Posman
Jurnal Teknologi dan Industri Pangan Vol. 12 No. 2 (2001): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

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Abstract

The objective of the experiment was to examine the capabilities of composite flour (i.e. corn flour and wheat flour) and xanthan gum in breadmaking. Breads were produced using mixture of wheat and corn flour at varios ratio with addition of xanthan gum at different level (0.0% to 0.75%). The result showed that the composite flour had significant effect on all measured parameters. As the wheat flour descreaseed down to 65% the dought length, texture, reducing sugar content increased, but the sensory values descresed, xanthan gum had significant effect on the texture, reducing sugar content, the sensory values and the dough length. As the xanthan gum increased, the dough length, the reducing sugar content increased, whereas the texture increased at 0.50% the descreased at 0.75%. the bread of good acceptability was produced from the floaur mixture of wheat flour (70%) and corn flour (30%) using 0.75% of xanthan gum.
Oksidasi Minyak dalam Emulsi O/W : Mekanisme dan Pengendaliannya Sibuea, Posman; Rahardjo, Sri; Santoso, Umar; Noor, Zuheid
Agritech Vol 24, No 4 (2004)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2343.726 KB) | DOI: 10.22146/agritech.13455

Abstract

Oxidation can alter the flavor and nutritional quality of foods and produces toxic and color compounds, which make foods less acceptable or unacceptable to consumers. Consequently, lipid oxidation has been extensively studied in bulk fats and oils, and there is a fairly good understanding of the mechanisms and the factors that affect oxidation in such systems. On the other hand, lipid oxidation is still not well understood in systems in which the fat is dispersed as emulsion droplets, although a large number of foods exit partially or entirely in the form of emulsions. This article reviews discusses the major factors that influence of the mechanism and controlling lipid oxidation in 0/W (oil-in-water) emulsions.
Quenching Mechanisms and Kinetics of Quercetin in Inhibition of Photosensitized Oxidation of Palm Oil and Linoleic Acid Sibuea, Posman; Suparmo, Suparmo; Santoso, Umar; Noor, Zuheid; Astuti, Mary; Raharjo, Sri
Indonesian Food and Nutrition Progress Vol 11, No 2 (2004)
Publisher : Indonesian Association of Food Technologists

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jifnp.39

Abstract

Effect of 0, 200, 400, 600, 800 and 1000 ppm (wt/vol) quercetin on the erythrosine sensitized photooxidations of palm oil and linoleic acid in methylene chloride containing 100 ppm erythrosine, were studied during storage under 4000 lux fluorescent light for 5 h by measuring peroxide value. Steady-state kinetic approximation was used to determine a quenching mechanism and quenching rate constant of quercetin in the erythrosine-sensitized photooxidation of palm oil and linoleic acid in methylene chloride model system. Erythrosine greatly increased the photooxidation of palm oil and linoleic acid, as was expected. Quercetin was extremely effective in minimizing erythrosine-sensitized photooxidation of palm oil and linoleic. As the concentration of quercetin increased from 0 to 200, 400, 600, 800 and 1000 ppm, the peroxide values of palm oil and linoleic acid decreased significantly (P <0.05). The steady-state kinetic studies indicated that quercetin quenched singlet oxygen only to minimize tire erythrosine-sensitized photooxidation of palm oil and linoleic acid. The calculated total quenching rate of quercetin on erythrosine photosensitized oxidation of palm oil in methtylene chloride was 4.3 x 109 M-1s-1 and total quenching rate of quercetin on erythrosine photosensitized oxidation of linoleic acid in methtylene chloride was 3.2 x 109 M-1s-1.
Singlet Oxygen Quenching Effect of Quercetin in Erythrosine-Sensitized Photooxidation of Oil-in-Water Emulsion Sibuea, Posman; Santoso, Umar; Noor, Zuheid; Raharjo, Sri
Indonesian Food and Nutrition Progress Vol 11, No 2 (2004)
Publisher : Indonesian Association of Food Technologists

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jifnp.41

Abstract

Oxidation reaction can be initiated by either diradical triplet oxygen or non radical singlet oxygen. The singlet oxygen can be formed infoods from triplet oxygen by photosensitized reaction. This research was intended to study the quenching effect of quercetin on lipid oxidation rate in the erythrosine-sensitized photooxidation of oil-in-water emulsion. Palm oil-in-water emulsion, containing erythrosine 100 ppm and quercetin 0, 25, 50, 75 and 100 ppm, were prepared with polyoxyelhylene 100 stearyl ether (Brij 700) or polyoxyethylene sorbitan monolaurate (Tween 20). Structurally Brij 700 has 5 times longer polyoxyethylene groups than Tween 20. The mixture were stored under 4000 luxfluorescent light for 10 h and peroxide values were measured at 2 h interval. Erythrosine effectively sensitized the photooxidation of palm oil-in-water emulsion, as expected. Lipid oxidation rates, as determined by the formation of lipid hydroperoxides and headspace oxygen, in palm oil-in-water emulsions containing erythrosine decreased with increasing quercetin concentration. At pH 3, the peroxide value was higher than at pH 7. Brij 700 decreased production of lipid hydroperoxides from palm oil-in-water-emulsions compared to emulsions stabilized by Tween 20. The results indicate that quercetin is an efective singlet oxygen quencher in palm oil-in-water emulsion and the surfactant headgroup size could be an important determinant in the oxidative stability of food emulsions.
MECHANISM AND KINETICS OF QUENCHING OF QUERCETIN ON PHOTOSENSITIZING EFFECT OF SYNTHETIC FOOD COLORANT ERYTHOSINE IN PALM OIL OXIDATION sibuea, Posman; Raharjo, Sri; Santoso, Umar
Jurnal Teknologi dan Industri Pangan Vol. 16 No. 2 (2005): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (456.916 KB)

Abstract

The effect 0, 200, 400, 600, 800 and 1000 ppm (wt/vol) quercetin on the singlet oxygen oxidation of palm oil in methylene chloride containing 100 ppm erythrosine, were studied during storage under 400 lux fluorecent light for 5 h by measuring peroxide value. Steady-state kinetic approximation was used to determine the quenching mechanism and quenching rate constant of quercetin in the erythrosine-sensitized photo oxidation of palm oil. Erythrosine greatly increased the As photo oxidation of palm oil, as was expected. Quercetin was extremely effective at minimizing erythrosine-sensitized photo oxidation of palm oil. As the concentration of quercetin increased from 0 to 200, 400, 600, 800 and 1000 ppm, the peroxide value of palm oils decreased significantly (p