Dias Indrasti
Departemen Ilmu dan Teknologi Pangan, Fakultas Teknologi Pertanian, Institut Pertanian Bogor, Bogor

Published : 4 Documents

Found 4 Documents

Media Gizi dan Keluarga Vol 31, No 2 (2007): Media Gizi dan Keluarga
Publisher : Media Gizi dan Keluarga

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Supplementary feeding program for needy student was designed to supplement target groups daily normal diet with the type of food nuded to alleviate their nutritional deficits. The location of the program was at the male and female students dormitory of IPB Campus in Darmaga Bogor. The implementation of the program was started in November 2005 until June 2006. The result showed that the average of energy and protein intake of program participant increased significantly after the completion of the program. Accordingly, the prevalence of anemia in female students decreased while in male students the prevalence was constant. Moreover. average of serum ferritin of females increased while serum ferritin of males remained constant. After completion of the program, the number of underweight students decreased The number of female and male students who were shiftingfrom underweight to normal category was increased. Nutrition knowledge of students participant were categorized as good Academic performance (GPA) of student participants (3.01) indicated higher than non-participant (2.85).
Analisis 3-Monokloro-1,2-Propanadiol (3-MCPD) Ester dalam Minyak Sawit dengan Instrumen Kromatografi Gas-Spektroskopi Massa Lioe, Hanifah Nuryani; Yuliana, Nancy Dewi; Indrasti, Dias; Regiyana, Yane; Putri, Cony Arisya
Jurnal Ilmu Pertanian Indonesia Vol 20, No 2 (2015): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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A group of components called as 3-monochloropropane-1,2-diol (3-MCPD) esters has been found in some vegetable oils, particularly palm oil. Analysis of these components needs GC-MS instrument to reach a low level detection, parts per billion or ppb level. An effort to validate the 3-MCPD esters analysis by GC-MS method (Weiβhaar method) using phenyl boronic acid (PBA) as a derivatizing agent and isotopic internal standard (IS) 3-MCPD-D5 followed by the determination of 3-MCPD in commercial palm oils has been conducted. The analytical results showed the instrumental performance as follows: instrument linearity for the analysis of 3-MCPD standard solutions containing IS 2.0 μg/mL was obtained at a concentration range of 0.25-7.50 μg/mL test solution with R2 higher than 0.990, precision of 3-MCPD as well as IS retention time was less than 2.0% which was acceptable according to JECFA guidance. Instrument detection limit (LOD) and limit of quantitation (LOQ) were read from GC-MS based on the linearity experiment, i.e. 0.17 and 0.59 μg/mL solution, respectively. Method linearity by using palm oil as a matrix also showed R2 higher than 0.990. Recovery test result at 40 μg/g gave an accuracy at 83.29 ± 7.12% which is in the range of AOAC standard (80-110%) and precision at 5.38% (less than RSDHORWITZ). Analysis of 14 palm oils from local market showed 100% of the sampels were positive to contain 3-MCPD esters. 3-MCPD esters in palm oil were found at a concentration range of 8.15-58.14 µg 3-MCPD/g sample.
PARAMETER KINETIKA INAKTIVASI TERMAL DAN ISOLASI Staphylococcus aureus PADA MINUMAN DARI GEL CINCAU HIJAU DAN ROSELA Purnomo, Eko Hari; Giriwono, Puspo Edi; Indrasti, Dias; Firlieyanti, Antung Sima; Kinasih, Andini Giwang
Jurnal Teknologi dan Industri Pangan Vol 26, No 1 (2015): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

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Information about heat resistance (D and z values) of target bacteria is needed for the thermal process design on drink from Green Grass Jelly (Premna oblongifolia Merr.) and Roselle (Hibiscus sabdariffa L.), so it can guarantee quality and safety of the product. The objectives of this research were to isolate Staphylococcus aureus from commercial green grass jelly and to determine the D and z values of Staphylococcus aureus (from commercial product and standard clinical isolate ATCC 25923) on heating menstruum of green grass jelly and roselle. Isolation of S. aureus was done by inoculation in selective medium, D and z values of Staphylococcus aureus were assessed by heating at constant temperatures of 57, 53, 49, and 45°C during the time interval 2.5, 5, 10, and 15 minutes. The results showed that one isolate (Isolate A) gave positive response of Staphylococcus aureus in isolation tests and had similar percentage with the reference culture of 41.8% using the API Staph Kit. Heat resistance of Staphylococcus aureus (represented as D value) isolated from green grass jelly at constant heating temperature of D45, D49, D53 and D57 were 32.3, 17.9, 4.6, and 1.5 minutes. On the other hand, D value of isolates ATCC 25923 (standard clinical isolate) at constant heating temperature of D45, D49, D53 and D57 were 18.5, 6.8, 2.9, and 1.4 minutes. The z value of isolates A and ATCC 25923 were 8.8°C and 10.8°C. Smaller z value of isolate A showed that pasteurization process can be accelerated and optimized with increasing the temperature slightly but has the same lethality effect.
Klorofil Daun Suji: Potensi dan Tantangan Pengembangan Pewarna Hijau Alami Indrasti, Dias; Andarwulan, Nuri; Purnomo, Eko Hari; Wulandari, Nur
Jurnal Ilmu Pertanian Indonesia Vol 24, No 2 (2019): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Chlorophyll has long been used as a green colorant for food and non-food applications. One source of chlorophyll is suji (Dracaena angustifolia (Medik.) Roxb.) leaf. The suji leaf chlorophyll has advantages and unique characteristics compared to the other chlorophyll sources that potential to be developed as a natural colorant. However, chlorophyll is easily degraded due to enzymatic and environmental factors. During processing and storage, the chlorophyll structure changes to its derivative compounds which are no longer green. Several attempts have been done to maintain the quality of the green color and quantity of chlorophyll contained in suji leaves. The formation of metallo-chlorophyll and development of suji leaf powder colorant have not been able to match the quality and quantity of its extract. These constraints become a challenge in the development of suji leaves as a natural colorant.