UJI SENSORI DAN PENENTUAN INDEKS GLIKEMIK NASI BERAS PUTIH (Oryza satifa L.) SUBTITUSI PISANG KEPOK (Musa paradisiaca forma typical) SEBAGAI MAKANAN POKOK ALTERNATIF PENDERITA DIABETES MELLITUS TIPE 2

Abstract

This study aimed to obtain the proportion of white rice and kepok banana based on sensory test results and the glycemic index of white rice with a substitution of kepok bananas. The research design used was an experimental method with a non-factorial Completely Randomized Design (CRD). The variation was in the proportion of white rice and kepok banana namely 60% : 40% (NP1), 50% : 50% (NP2) dan 40% : 60% (NP3). Each treatment was repeated three times. The sensory test was carried out using the hedonic test (level of preferences). The glycemic index was analyzed through the area under the curve (AUC) ratio of glucose response of food by measuring blood glucose levels during fasting for 30, 60, 90, and 120 minutes after consuming test foods (white rice with a substitution of kepok banana) and control (bread). The collected data were then analyzed using ANOVA and was followed by DMRT if there was a significant difference between treatments. The result of the research shows that in the sensory test, the proportion of white rice and kepok banana had no significant effect on color and aroma, but had a significant effect on texture and very significant effect on the taste of white rice with a substitution of kepok banana. The best treatment was obtained in the proportion of white rice and kepok banana 60%: 40% (NP1), with preference scores of color, aroma, texture, and taste reached 3.08 (like), 2.68 (like), 3.16 (like) and 3.12 (like), respectively. The selected treatment had a 20.13% glycemic index (low).Keywords: Sensory test, glycemic index,white rice, kepok banana,diabetes mellitusABSTRAKTujuan penelitian untuk mendapatkan perbandingan nasi beras putih dan pisang kepok yang terbaik berdasarkan hasil uji sensori dan indeks glikemik nasi beras putih yang disubtitusi pisang kepok. Penelitian menggunakan metode eksperimen dengan Rancangan Acak Lengkap (RAL). Perlakuan terdiri atas 3 variasi perlakuan yaitu perbandingan nasi beras putih : pisang kepok 60% : 40% (NP1), 50% : 50% (NP2) dan 40% : 60% (NP3). Masing-masing perlakuan dibuat 3 kali ulangan. Uji sensori menggunakan uji hedonik (tingkat kesukaan) dan penentuan indeks glikemik dengan perhitungan perbandingan luas di bawah kurva (area under curve). Respon glukosa makanan melalui hasil pengukuran glukosa darah saat puasa; 30; 60; 90 dan 120 menit setelah konsumsi makanan uji yaitu nasi putih subtitusi pisang kepok dan makanan kontrol yaitu roti. Data hasil uji sensori dianalisis dengan metode Analisis of Varians (ANOVA) dan perlakuan yang berpengaruh nyata dilakukan uji lanjut dengan analisis DMRT. Berdasarkan hasil analisis uji sensori perbandingan nasi beras putih dan pisang kepok tidak berpengaruh nyata terhadap warna dan aroma, tetapi berpengaruh nyata terhadap tekstur dan berpengaruh sangat nyata terhadap rasa nasi beras putih subtitusi pisang kepok. Perlakuan terbaik diperoleh pada perlakuan nasi beras putih : pisang kepok 60% : 40% (NP1), dengan tingkat kesukaan terhadap warna 3,08 (suka), aroma 2,68 (suka), tekstur 3,16 (suka) dan rasa 3,12 (suka) serta nilai indeks glikemik 20,13% dengan kategori indeks glikemik rendah.Kata kunci: Uji sensori, indeks glikemik, nasi beras putih, pisang kepok, diabetes melitus