Tien R. Muchtadi
Departemen Ilmu dan Teknologi Pangan, Fakultas Teknologi Pertanian, Institut Pertanian Bogor, Bogor

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AKTIVITAS ANTIOKSIDAN EKSTRAK DAN FRAKSI EKSTRAK BIJI ATUNG (Parinarium glaberrimum Hassk.) [Antioxidant Activities of Parinarium glaberrimum Hassk Extracts and their Fractions] Sarastani, Dewi; Soekarto, Soewarno T.; Muchtadi, Tien R.; Fardiaz, Dedi; Apriyantono, Anton
Jurnal Teknologi dan Industri Pangan Vol. 13 No. 2 (2002): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

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Abstract

The seed of Parinarium glaberrimum Hassk was extracted with non polar solvent (hexane) and or polar solvent (ethanol).  Antioxidative activity of extracts was measured by rates of carotene bleaching in the coupled oxidation of linoleic acid and b-carotene.  Ethanolic-Hexanoic Extract (EHE) of the seed was found to possess the highest antioxidative activity. Furthermore, EHE was fractionated by silica column chromatography and eight major fractions were isolated  according to UV absorption.  Antioxidative activity of these fractions was evaluated in a b-carotene-linoleate system.  Fractions III , I , and II showed the major activity, but fractions I and II have the best value of relative capacity, so they were chosen for further identification.
Palm oil contains carotenoid about 500-700 ppm.  Epidemiology study showed that carotenoids are beneficial for health, but most of carotenoids are destructed and loss during purification of palm oil, so need to be modified to minimize the loss and destruction of carotenoids.  One of the methods was to use NaOH to neutralize free fatty acid after degumming step.  The aim of this research was to determine optimum condition of deacidification process of palm oil to minimize the destruction of c Muchtadi, Tien R.; Hariyadi, Purwiyatno; Haryati, Tri; Mas’ud, Fajriyati
Forum Pasca Sarjana Vol. 31 No. 1 (2008): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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Palm oil contains carotenoid about 500-700 ppm.  Epidemiology study showed that carotenoids are beneficial for health, but most of carotenoids are destructed and loss during purification of palm oil, so need to be modified to minimize the loss and destruction of carotenoids.  One of the methods was to use NaOH to neutralize free fatty acid after degumming step.  The aim of this research was to determine optimum condition of deacidification process of palm oil to minimize the destruction of carotenoids.  This research used Central Composite Design (CCD).  Response surface model was applied to see influence of treatment to rendemen, free fatty acid and carotenoids contents of neutralized palm oil (NPO) with three variables of temperature, time, and consentration of NaOH.  This research showed the optimum condition of deacidification process of palm oil to minimize the destruction of carotenoids, i.e. temperature of 59oC, time 25 minutes, and NaOH 11.1% (16oBe).  In this condition the content of  NPO was 95%, with 0.16% of free fatty acid  and total carotenoids of 390 ppm.     Key words: palm oil, deacidification, carotenoid
SIFAT FISIK MINYAK SAWIT KASAR DAN KORELASINYA DENGAN ATRIBUT MUTU [Physical Properties of Crude Palm Oil and Their Correlations to the Quality Attributes] Wulandari, Nur; Muchtadi, Tien R.; Budijanto, Slamet; ., Sugiyono
Jurnal Teknologi dan Industri Pangan Vol. 22 No. 2 (2011): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

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Abstract

Indonesia is the largest producer and exporter of crude palm oil (CPO) in the world. Process engineering applications of CPO during handling, transporting, and processing, need baseline data related to CPO’s physical properties. This research was aimed to obtain baseline data about physical properties of CPO and to study the correlation between CPO’s quality attributes to their physical property parameters. Study on physical property and quality of CPO was conducted to five CPO samples from different CPO’s producers. Those samples had variations on physical property parameters and quality attributes. Some physical property parameters of CPO were depended on the temperature of measurements. CPO samples showed non-Newtonian pseudoplastic behaviour at 25°C with various flow behaviour index (n) and concistency index (K), other wise at 55°C all CPO samples showed Newtonian behaviour.There were good correlations between quality attributes of CPO to their physical property parameters at 25°C, including correlations between free fatty acid contents of CPO and the temperatures of crystallization, as well as between iodine values and the rheological properties of CPO. 
PENGARUH PENAMBAHAN LILIN LEBAH DAN NANOPARTIKEL SENG OKSIDA TERHADAP SIFAT FISIK DAN MEKANIS FILM BERBASIS KITOSAN Nandiwilastio, Novan; Muchtadi, Tien R.; Suyatma, Nugraha E.; Yuliani, Sri
Jurnal Teknologi dan Industri Pangan Vol. 30 No. 2 (2019): 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 (292.056 KB) | DOI: 10.6066/jtip.2019.30.2.119

Abstract

Chitosan-based films showed good gel formation capability and gas permeability (CO2 and O2). However, the high permeability of water vapor limits the application of chitosan as a single coating material. Additionally, single chitosan film was also brittle, so the addition of lipid and metal nanoparticles were chosen to solve this problem. This research aimed to determine the effect of the addition of beeswax emulsion and zinc oxide nanoparticles (ZnO-NPs) on the physical and mechanical properties of chitosan based films. The film was prepared by dissolving ZnO-NPs (0, 1 and 2% by weight of chitosan) into 100 mL of distilled water followed by the addition 1 g of chitosan and or, addition of beeswax emulsion (0 and 5% by the volume of solution). The result showed that the addition of beeswax emulsion ZnO-NPs into chitosan based film significantly decreased WVTR value from 24.03 to 10.38 g/m2 hours and the  tensile strength value from 8.30 to 6.92 Mpa. The addition of beeswax emulsion and ZnO-NPs also changed the physical properties of chitosan-based film significantly; in terms appearance, color and thickness. Mean-while, the film elongation percentage changed significantly in the  range of 30.36 to 50.09 % when ZnO-NPs was added into chitosan-based film solution. Overall, the addition of beeswax and ZnO-NPs showed improvement of the physical and mechanical properties of chitosan-based films so that better packaging of fresh food products can be developed.
SIFAT REOLOGI DAN STABILITAS FISIK MINUMAN EMULSI MINYAK SAWIT Dianingsih, Nurlita; Purnomo, Eko Hari; Muchtadi, Tien R.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (488.945 KB) | DOI: 10.6066/jtip.2016.27.2.165

Abstract

Palm oil emulsion drink is one of the food diversification product, containing high provitamin-A. The dispersed phase of the emulsion is palm olein, while the rest was water as the dispersion medium (ratio 7:3). The low content of dispersion medium in the emulsion caused the rheological properties, droplet size and distribution, as well as its level of stability to be different from other commercial product of beverage emulsion. This research investigated the effect of storage time on the rheological properties, droplet size distributions and stability of the emulsion. The emulsion morphology was observed by polarized light microscopy, while its size and distribution were analyzed by dynamic light scattering technique using Zetasizer. The rheological analysis, including the determination of the flow behavior and consistency index, were measured using a rotational dial reading viscometer. The results showed that increasing of storage time led to increased droplet size and distribution (d4.3 value from 4.83 to 6.12 µm, value of flow behavior index from 0.9782 to 0.9873, and consistency index from 3.473 to5.047 Pa.sn). However, this condition also caused a decrease in emulsion stability (from 0.880 to 0.823). According to Pearson’s correlation coefficients, the droplet size was negatively correlated with emulsion stability (R = -0.907; α = 0.01). However, the droplet size were positively correlated with the flow behavior index (R = 0.778; α = 0.01) and consistency index (R = 0.939; α = 0.01). These results may help formulate palm oil emulsion drink with improved stability and shelf-life.
Fermented was reported to have different physicochemical and functional properties to those of non fermented flour.  The objective of this research was to study the effect of spontaneous fermentation to chemical and rheological properties of corn flour and to identifying correlation among parameters.  Flour was prepared by spontaneous fermentation with variation of fermentation time (0, 12, 24, 36, 48, 60 and 72 hours).  The result indicated that the increasing of corn grits fermentation time Aini, Nur; Hariyadi, Purwiyatno; Muchtadi, Tien R.; Andarwulan, Nuri
Forum Pasca Sarjana Vol. 32 No. 1 (2009): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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Abstract

Fermented was reported to have different physicochemical and functional properties to those of non fermented flour.  The objective of this research was to study the effect of spontaneous fermentation to chemical and rheological properties of corn flour and to identifying correlation among parameters.  Flour was prepared by spontaneous fermentation with variation of fermentation time (0, 12, 24, 36, 48, 60 and 72 hours).  The result indicated that the increasing of corn grits fermentation time was decrease of protein, crude fiber, lipid, ash, starch  and amylase content of corn flour.  The increasing of protein content, reduction sugar, crude fiber, ash, bulk density and gelatinization time were decrease of gel strength.  Gel strength will be promote with increasing of angle of repose and peak viscosity.  Gel stickeness will decrease with increasing of amylosa: amylopecyin ratio and breakdown viscosity.   Key words: white corn, flour,fermentation, chemical, rheological
HUBUNGAN ANTARA WAKTU FERMENTASI GRITS JAGUNG DENGAN SIFAT GELATINISASI TEPUNG JAGUNG PUTIH YANG DIPENGARUHI UKURAN PARTIKEL [Relationship between Fermentation Time of Corn Grits and Gelatinization Properties of White Corn Flour Influenced by Particle ., Nur Aini; Hariyadi, Purwiyatno; Muchtadi, Tien R.; Andarwulan, Nuri
Jurnal Teknologi dan Industri Pangan Vol. 21 No. 1 (2010): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

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Abstract

The uses of white corn in Indonesia’s food industries are still limited. To explore the potential uses, evaluation of functional properties of white corn flour is needed. The objective of this study was to evaluate the gelatinization properties of white corn flour, and its changes as affected by spontaneous fermentation of white corn grits and particle size of its flour.  White corn flour was prepared by soaking of white corn grits followed by drying and grinding.  Soaking was done in a closed pan at a controlled temperature, to promote spontaneous fermentation.  The fermented  flour was fractionated by particle size using multiple sieves of 100 mesh (150 µm), 150 mesh (106 µm) and 200 mesh (75µm) and analyzed for its chemicals, physicals and gelatinization characteristics. The result showed that the smaller particle size resulted in increased breakdown viscosity and the tendency to retrogradate. Overall, the  result showed that control of length of fermentation of corn grits and particle size could be used as a mean to control breakdown viscosity and tendency to the retrogradation of the corn flour.