Supriyadi Supriyadi
Department Of Food Science, Faculty Of Agricultural Technology, Universitas Gadjah Mada, Jl. Sosio Yustisia, Bulaksumur, Yogyakarta 55281

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Pendugaan Umur Simpan Kerupuk Ikan Lele Dumbo (Clarias gariepinus) Panggang dalam Kemasan Plastik Metalik dan Polipropilen Diah Ikasari; Theresia Dwi Suryaningrum; Inti Mulyo Arti; Supriyadi Supriyadi
Jurnal Pascapanen dan Bioteknologi Kelautan dan Perikanan Vol 12, No 1 (2017): Juni 2017
Publisher : Balai Besar Riset Pengolahan Produk dan Bioteknologi Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jpbkp.v12i1.342

Abstract

AbstrakTujuan dari penelitian ini adalah menentukan umur simpan kerupuk ikan lele dumbo panggang menggunakan pendekatan model kadar air kritis dengan 2 jenis kemasan yakni plastik metalik dan polipropilen. Kerupuk ikan ditentukan kadar air awal, kadar air kritis, kadar air kesetimbangan beserta nilai aktifitas air untuk dapat dimasukkan dalam persamaan Labuza. Permeabilitas, ketebalan, dan luas kemasan juga dianalisis sebagai variabel pendukung yang digunakan dalam persamaan Labuza. Titik kritis ditentukan berdasarkan hasil uji skor yang dilakukan oleh 21 panelis terlatih terhadap nilai kerenyahan produk kerupuk hingga produk dinyatakan tidak renyah (skor 2). Hasil perhitungan pendugaan umur simpan berdasarkan persamaan Labuza menunjukkan bahwa kerupuk ikan lele dumbo panggang dengan kemasan plastik metalik memiliki umur simpan yang lebih lama (329 hari) dibandingkan dengan plastik polipropilen (231 hari). Shelf Life Determination of Roasted Catfish Crackers Stored with Metallic and Polypropylene PackagingAbstractStudy aimed to determine the shelf life of roasted catfish crackers using critical moisture content model packed with two plastic packaging, namely metalized plastic and polypropilen plastic. The crackers were determined for their initial moisture content, critical moisture content, equilibrium moisture content, and water activity to be included in the Labuza equation. Permeability, thickness, and area of packaging were also analyzed as additional variable needed by Labuza equation. The critical point was determined based on the scoring test result conducted by 21 welltrained panelists for the crispness value of roasted catfish crackers until the crackers were scored not crispy. Result of the shelf life calculation using Labuza equation showed that the shelf life of roasted catfish crackers packed with metalized plastic was longer (329 days) compared to the one that packed with polypropilen plastic (231 days).
Karakteristik Perkecambahan Biji Lamtoro [Leucaena leucocephala (Lam.)de Wit] pada Perlakuan Skarifikasi serta Perubahan Nilai Gizi Setelah Perkecambahan Yasmin Aulia Rachma; Retno Indrati; Supriyadi Supriyadi
Buletin Anatomi dan Fisiologi Volume 7, Nomor 1, Tahun 2022
Publisher : Departemen Biologi Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/baf.7.1.2022.11-19

Abstract

Lamtoro [Leucaena leucocephala (Lam.) de Wit] merupakan komoditas pangan lokal Indonesia yang berpotensi sebagai pangan sumber protein, namun biji lamtoro tua kurang diminati. Proses pengolahan yang dapat diaplikasikan pada biji lamtoro tua adalah perkecambahan, yang kemudian hasilnya biasa diolah menjadi berbagai makanan khas Indonesia. Lamtoro tua memiliki kulit biji yang tebal dan keras, sehingga perlu proses skarifikasi untuk memudahkan perkecambahan. Tujuan penelitian ini adalah untuk mengetahui karakteristik perkecambahan biji lamtoro pada perlakuan skarifikasi dengan variasi suhu dan durasi perendaman serta perubahan nilai gizi biji lamtoro setelah perkecambahan. Skarifikasi dilakukan dengan cara perendaman dalam air dengan suhu 50, 70, dan 90°C selama 5, 10, dan 15 menit kemudian dianalisis karakteristik perkecambahan berupa persen imbibisi, persen perkecambahan, dan kecepatan berkecambahnya. Kecambah dengan karakteristik perkecambahan terbaik dianalisis perubahan kandungan gizinya. Data diambil dengan pola Rancangan Acak Lengkap (RAL) pada tingkat kepercayaan 95%. Hasil penelitian menunjukkan bahwa pola imbibisi yang terjadi pada biji lamtoro bersifat trifase. Perlakuan skarifikasi dengan air pada suhu 70°C selama 15 menit menghasilkan persen imbibisi, persen perkecambahan, dan kecepatan berkecambah tertinggi, sehingga uji perubahan kandungan gizi dilakukan pada perkecambahan dengan skarifikasi pada suhu 70°C selama 15 menit. Setelah perkecambahan selama 72 jam terjadi peningkatan kadar air dan kadar protein, serta penurunan kadar lemak, abu, dan karbohidrat. Lamtoro [Leucaena leucocephala (Lam.) de Wit] is a local Indonesian food commodity that can be a food source of protein, but old lamtoro seeds are less attractive. The processing process that can be applied to old lamtoro seeds is germination, which is then usually processed into various Indonesian specialities. Old lamtoro has a thick and hard seed coat, so it needs a scarification process to facilitate germination. The purpose of this study was to determine the germination characteristics of lamtoro seeds in scarification treatment with variations in temperature and soaking duration, as well as changes in the nutritional value of lamtoro seeds after germination. Scarification was carried out by immersion in water at a temperature of 50, 70, and 90°C for 5, 10, and 15 minutes and then analyzed for germination characteristics in the form of percent imbibition, germination percentage, and germination speed. Sprouts with the best germination characteristics were analyzed for changes in nutritional content. Data were taken using a completely randomized design (CRD) pattern at a 95% confidence level. The results showed that the imbibition pattern that occurred in lamtoro seeds was triphase. Scarification treatment with water at 70°C for 15 minutes resulted in the highest percent imbibition, germination percentage, and germination speed, so the test for changes in nutrient content was carried out on germination by scarification at a temperature of 70°C for 15 minutes. After germination for 72 hours, there was an increase in water content and protein content and a decrease in fat, ash, and carbohydrate content.
CALCIUM ABSORPTION KINETIC ON INDONESIAN RICE Chatarina Wariyah; Mary Astuti; Supriyadi Supriyadi; Chairil Anwar
Indonesian Journal of Chemistry Vol 8, No 2 (2008)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (246.95 KB) | DOI: 10.22146/ijc.21630

Abstract

Calcium absorption kinetic from three varieties rice i.e. low-, medium-, and high amylose content were evaluated. Three calcium salt (calcium acetate, -lactate and - gluconate) were used as a fortifican. Each rice was soaked at the calcium salts at soaking temperatures of 80, 90 and 100 oC, for 30 min and the calcium content was analyzed periodically. Reaction rate constant was determined from slope of curve of the relation of soaking time and absorbed calcium. The activation energy was determined by Arrhenius equation. The research showed that rice calcium absorption follows the first-order kinetic and absorption rate tends to decrease with increasing temperature. Calcium absorptions were affected by calcium salt solubility. Calcium acetate was absorbed easier than calcium lactate and calcium lactate was absorbed easier than calcium gluconate, but the absorption rate constant of calcium acetate was lower than that of calcium lactate, and calcium lactate was lower than calcium gluconate. Based on amylose content of rice, the higher the amylose content, the lower calcium absorption rate. The activation anergy of the high amylose rice was higher than that of low amylose content.
Sensory Analysis, Caffeine, Chlorogenic Acid and Non-Volatile Taste Compounds of Arabica Coffee (Coffea arabica) Fermented with Sugar Addition for Brew Taste Kresna Mulya Santosa; Supriyadi Supriyadi; Sri Anggrahini; Yudi Rahmadian
Indonesian Food and Nutrition Progress Vol 17, No 2 (2020)
Publisher : Indonesian Association of Food Technologists

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ifnp.52241

Abstract

Arabica coffee is the most popular variety of coffee among the people because it has a more complex flavor than other coffee varieties. This study aims to determine sensory properties and non-volatile components in Arabica coffee fermented with sugar addition. The sensory assessment showed that the best cupping score was the samples fermented with the addition of 0.55% fructose with a total score of 85.25 compared to honey (H) and Fullwash (FW) samples. Fermentation with the addition of 0.55% fructose could produce better coffee compared to samples (H) and (FW). Fermentation with the sugar addition of 0.55% could affect non-volatile components such as soluble sugars, organic acids, amino acids, caffeine, and chlorogenic acid. The content of chlorogenic acid and caffeine analysed by HPLC was found relatively stable in green and roasted beans. Amino acids analysed by LCMS showed glutamate was the highest amino acid in all samples and were supposed to have a role in Maillard reaction contributing to coffee flavor. In conclusion, fermentation with the addition of 0.55% sugar in coffee processing could generally enhance the coffee flavor for brew taste with its potential as functional drink.