The aim of this research was to analyze the composition and physico-chemical properties of purple rice that is preferred by group of people in Bali. Purple rice were made with various pasta proportions, which were 100, 200, 300, 400 and 500 g were added to 700 g of rice. Physical properties include texture and color of purple rice with various proportion of pasta were analyzed followed by hedonic test. Parameters observed were, texture, color, and overall preference of purple rice. This research was designed as completely randomized design with 2 replicates and data of the results were analyzed using ANOVA at the significance level of 95%, followed by Duncan’s Multiple Range Test, if there was a significant difference. The results of research indicated that purple rice had texture of 2,19–2,37 N, with lightness of 42,7–54,97, tending to be blueish red (purple) with degree of redness of +8,33 until +15,13 and blueness degree of +1 until +4,60. Purple rice made from a mixture of ratio of 100 g rice: 300 g was preferred by panelists with texture of 2,26 N, lightness of 48,93, tending to be blueish red (purple) with degree value redness of +14,40 and blueness degree of +2,37.

This research was aimed to determine the effect of different tongka langit banana puree concentration on the physical, chemical, and sensory characteristics of muffin and determine the exact concentration of muffin with the best quality. A complete randomized experimental design with four levels of concentrations, i.e. 0% (control), 70%, 80%, and 90% was applied in this research. Results showed that the best physical, chemical, and sensory properties of muffins were obtained with the addition of 80% tongka langit banana puree.  A muffin with this respective concentration had an expansion volume of 118%, moisture, ash, vitamin, and total sugar contents of 26.09%, 1.56%, 0.60%, and 15.10%, subsequently. Based on its sensory characteristics, muffin with 80% banana puree was mostly preferred by panelists on aroma and overall likeness. The sensory characteristics of tongka langit banana were also maintained in the muffin. Keywords: muffin, physicochemical, sensory, tongka langit banana puree   ABSTRAK Penelitian ini bertujuan untuk menentukan pengaruh konsentrasi puree pisang tongka langit terhadap karakteristik fisik, kimia dan organoleptik muffin dan menentukan konsentrasi puree yang tepat yang menghasilkan muffin dengan karakteristik terbaik. Rancangan Acak Lengkap dengan faktor tunggal konsentrasi puree pisang tongka langit dengan level 0% (kontrol), 70%, 80%, dan 90% digunakan dalam penelitian ini. Hasil penelitian menunjukkan bahwa puree dengan konsentrasi 80% merupakan perlakuan yang tepat untuk menghasilkan muffin dengan karakteristik terbaik secara fisik, kimia dan organoleptik. Muffin dengan puree pisang tongka langit 80% memiliki volume pengembangan 118%, kadar air 26,09%, kadar abu 1,56%, kadar vitamin C 0,60%, total gula 15,10% dan lebih disukai panelis pada kategori aroma dan overall serta lebih mempertahankan karakteristik pisang tongka langit pada muffin. Kata Kunci: fisikokimia, muffin, organoleptik, puree pisang tongka langit

Cassava peel has high nutrient content and has the opportunity to be processed into chips. Processing of cassava peel chips requires soaking treatment to produce a crisper texture. The purpose of this study was determining the right type of soaking solution to produce the best cassava peel chips. The result showed that the immersion treatment with CaCO3 solution produced chips with the best physical properties having the hygroscopic value, absorption capacity, expansion volume of 0.105g, 12.95%, and 10,05%, respectively. Organoleptically the chips were liked for its task (2.30), somewhat like for its colour (2.47) texture were liked (2.53) and overall the chips were liked (2.50) by panelist. The chips were also having a brown colour (3.03) and a crispy texture (3.13). Keywords: cassava peel, chips, soaking solution   ABSTRAK Kulit ubi kayu memiliki kandungan gizi yang tinggi dan berpeluang untuk diolah menjadi keripik. Pengolahan keripik kulit ubi kayu memerlukan perlakuan perendaman agar menghasilkan tekstur yang lebih renyah. Tujuan penelitian ini untuk menentukan jenis larutan perendaman yang tepat untuk menghasilkan keripik kulit ubi kayu terbaik. Hasil penelitian menunjukkan bahwa perlakuan perendaman dengan larutan CaCO3 menghasilkan sifat fisik keripik terbaik dengan nilai higroskopis 0,105g, daya serap 12,95%, volume pengembangan 10,05 % dan berdasarkan uji hedonik menunjukkan rasa suka (2,50), warna agak suka (2,47), tekstur suka (2,53) dan overall suka (2,50) sedangkan untuk uji mutu hedonik menunjukkan warna coklat (3,03) dan tekstur renyah (3,13). Kata kunci: keripik, kulit ubi kayu, larutan perendam

<p>The utilization of starch-base ingredients, such as sago starch for the manufacture of edible films, is still growing. The nature of the film produced from starch material is still not optimal, hence research is needed to improve its utilization. Starch composites with other ingredients, such as pectin, are expected to grow their properties. The study aimed to characterize the properties of edible film produced from molat sago starch-pectin composites, including thickness, tensile strength, elongation, solubility, transparency, and water vapor transmission rate. The study was conducted from July to August 2017 at Food Chemistry and Biochemistry Laboratory, Pattimura University, Ambon, and Food Engineering Laboratory, Gadjah Mada University, Yogyakarta. The design used was a non-factorial completely randomized design of the treatment of composite sago-pectin starch, with five levels of treatment (3: 0; 2.75:0.25; 2.5:0.5; 2.25:0.75 and 2:1 (g/g)). Based on the results of the analysis of diversity, the treatment of composite sago-pectin starch affects the changes in the mechanical, physical, and barrier characteristics of the edible film. Increasing the concentration of pectin (0-1%) in the film solution decreases the elongation of the film, but increases the properties of thickness, tensile strength, solubility, transparency, and the rate of water vapor transmission. The treatment of sago-pectin starch composites 2:1 can improve the physical and mechanical properties of edible films, although it has a high value of solubility and water vapor transmission rate.<em></em></p><p align="center"><strong>ABSTRAK</strong></p><p>Pemanfaatan bahan dasar pati-patian, seperti pati sagu untuk<em> </em>pembuatan<em> edible film</em> masih terus berkembang. Sifat <em>film</em> yang dihasilkan dari bahan pati-patian masih belum optimal. Diperlukan penelitian untuk dapat meningkatkan pemanfaatannya. Komposit pati dengan bahan lainnya, seperti pektin diharapkan dapat meningkatkan sifat-sifatnya. Tujuan penelitian adalah mengkarakteristik sifat-sifat <em>edible film</em> yang dihasilkan dari komposit pati sagu molat-pektin, meliputi ketebalan, kuat tarik, elongasi, daya larut, transparansi dan laju transmisi uap air. Penelitian dilaksanakan pada bulan Juli sampai dengan Agustus 2017 di Laboratorium Kimia dan Biokimia Pangan, Universitas Pattimura, Ambon, dan Laboratorium Rekayasa Pangan, Universitas Gadjah Mada, Yogyakarta. Rancangan yang digunakan adalah Rancangan Acak Lengkap (RAL) dengan perlakuan adalah komposit pati sagu molat-pektin, dengan lima taraf perlakuan (3:0; 2,75:0,25; 2,5:0,5; 2,25:0,75 dan 2:1 (g/g)). Berdasarkan hasil analisis keragaman, perlakuan komposit pati sagu molat-pektin berpengaruh terhadap perubahan sifat-sifat mekanik, fisik dan <em>barrier edible film</em>. Meningkatnya konsentrasi pektin (0-1%) pada larutan <em>film</em> menurunkan elongasi <em>film</em>, tetapi meningkatkan sifat-sifat ketebalan, kuat tarik, daya larut, transparansi, dan laju transmisi uap airnya. Perlakuan komposit pati sagu molat-pektin 2:1 dapat memperbaiki sifat fisik dan mekanik <em>edible film </em>walaupun daya larut dan nilai laju transmisi uap airnya tinggi.</p>

The aim of this research is to analyze the preference level and prebiotic potency of purple rice that is preffered by group of people in Bali. Purple rice with various pasta proportions, which are 100, 200, 300, 400 and 500 g added to 700 g of rice and tested of preference level. The next part was analyzing the Organoleptic and prebiotic capacity of the best purple rice were tested. Prebiotic capacity testing using Bifidobacterium longum and Lactobacillus acidophillus cultured in MRS modified media plus coarse fibers of purple rice and used control of fibers of fresh sweet potato, sweet potato pasta, rice and cooked rice. Parameters observed were preferable level of purple rice, probiotic bacteria growth and prebiotic activity score. This research were designed as Completely Randomized Design (RAL) with 2 replicates and data of the results were analyze at variation of 95% reliance interval and, if there was real difference, it would be continued by Duncan's Multiple Range Test. The results of research indicated that purple rice made of ratio of 100 g rice: 300 g mixture was preferably by panelists. Prebiotic activity score of purple rice was higher than white rice, -0.006 + 0.2 for Bifidobacterium longum and -0.015 + 05 for Lactobacillus acidophilus were means that purple rice has best capacity to become a prebiotic than cooked rice or white rice.Keywords: purple rice, purple sweet potato, prebiotic ABSTRAKPenelitian ini bertujuan untuk menganalisis tingkat kesukaan dan potensi prebiotik dari nasi ungu yang merupakan makanan tradisional yang disukai oleh kelompok masyarakat di Bali. Nasi ungu dengan berbagai proporsi pasta ubi jalar ungu yaitu 100, 200, 300, 400 dan 500 g pasta yang ditambahkan ke dalam 700 g beras dan diuji tingkat kesukaan. Tahap selanjutnya potensi prebiotik dari produk nasi ungu yang disukai oleh panelis. Pengujian potensi prebiotik menggunakan dua kultur bakteri yakni Bifidobacterium longum dan Lactobacillus acidophillus yang ditumbuhkan pada media MRS modifikasi yang ditambahi serat kasar dari nasi ungu dan dipergunakan kontrol berupa serat kasar ubi jalar segar, pasta ubi jalar, beras dan nasi. Parameter yang diamati antara lain tingkat kesukaan terhadap nasi ungu, pertumbuhan bakteri probiotik dan skor aktivitas prebiotik. Rancangan penelitian yang dipergunakan adalah Rancangan Acak Lengkap dengan 3 kali ulangan dan data hasil penelitian akan dianalisis variansi pada tingkat kepercayaan 95% dan apabila terdapat perbedaan yang nyata akan dilanjutkan dengan Duncan's Multiple Range Test. Hasil penelitian menunjukkan bahwa nasi ungu yang dibuat dengan perbandingan 700 g beras ditambah 300 g pasta secara sensoris paling disukai panelis. Score aktifitas prebiotik untuk nasi ungu lebih tinggi dibandingkan dengan nasi putih yakni sebesar -0,006 ± 0,2 untuk Bifidobacterium longum dan -0,015 ± 05 untuk Lactobacillus acidophilus yang berarti nasi ungu lebih berpotensi sebagai prebiotik dibandingkan dengan nasi putih.Kata kunci: nasi ungu, ubi jalar ungu, prebiotik