Effects of retrogradation and further acetylation on the digestibility and physicochemical properties of purple sweet potato flour and starch

2015 ◽  
Vol 67 (9-10) ◽  
pp. 892-902 ◽  
Author(s):  
Shu‐Xi Yu ◽  
Tai‐Hua Mu ◽  
Miao Zhang ◽  
Meng‐Mei Ma ◽  
Zhong‐Kai Zhao
Keyword(s):  
Physicochemical Properties ◽  
Sweet Potato ◽  
Potato Flour ◽  
Sweet Potato Flour ◽  
Purple Sweet Potato

scholarly journals Pengembangan Hybrid Tepung Ubi Jalar Kaya Antioksidan

2019 ◽  
Vol 10 (2) ◽  
pp. 153
Author(s):  
Sefanadia Putri
Keyword(s):  
Antioxidant Activity ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Sweet Potato ◽  
Block Design ◽  
Acetobacter Xylinum ◽  
Potato Flour ◽  
Total Carbohydrate ◽  
Sweet Potato Flour ◽  
Purple Sweet Potato

<p>Sweet potato is one type of tubers found in Indonesia. <em>Hybrid</em> of sweet potato flour is obtained from the modification of the processing by fermentation using lactic acid bacteria. The purpose of this study was to determine the nutritional and antioxidant content of various types of <em>hybrid</em> sweet potato flour. This research is an experimental laboratory with a true-experiment design. The experiment was arranged in a complete randomized block design (RCB) with three replications. The treatments are 6 types of sweet potatoes which include purple sweet potato Var.Antin 1, purple sweet potato val.local, white sweet potato, orange sweet potato, Japanese purple sweet potato Var.Ayamurasaki and cilembu sweet potato. The study included the fermentation process using lactic acid bacteria (Acetobacter xylinum) addition concentration of 5%, siege, analysis of nutrient content (water, ash, protein, fat, fiber and carbohydrates) and antioxidant activity of various types of <em>hybrid</em> sweet potato flour. The results showed that various types of <em>hybrid</em> sweet potato flour significantly affect the nutritional content which includes water content, ash content, fat content, protein content, fiber content and total carbohydrate. The result of antioxidant activity in various types of <em>hybrid</em> sweet potato flour after fermentation treatment in a concentration of 5% Acetobacter xylinum ranged from 29,383-53.7929%. The lowest value obtained at cilembu <em>hybrid</em> sweet potato flour and the highest value was obtained from the Japanese <em>hybrid</em> sweet potato flour var.Ayamurasaki.</p>

scholarly journals Pengaruh Substitusi Tepung Ubi Jalar Ungu Terhadap Karakteristik Kue Kering

2018 ◽  
Vol 7 (1) ◽  
pp. 30-35
Author(s):  
Helen C.D. Tuhumury ◽  
La Ega ◽  
Nuram Keliobas
Keyword(s):  
Chemical Composition ◽  
Experimental Design ◽  
Sweet Potato ◽  
Wheat Flour ◽  
Anthocyanin Content ◽  
Potato Flour ◽  
Nutritional Content ◽  
Randomized Experimental Design ◽  
Sweet Potato Flour ◽  
Purple Sweet Potato

The objective of the study was to determine the concentation ratio between purple sweet potato flour and wheat flour in order to produce purple sweet potato cookies having particular nutritional content and preffered by consumers. A completely randomized experimental design was applied in this study. One experimental factor which was ratio of purple sweet potato flur and wheat flour consisting five level of treatments, was as signed i,e 100%: 0%, 80:20%, 60%:40%, and 20%: 80% respectively. Variables measured were chemical composition (protein, fat, moisture, anthocyanin content) and sensory properties (colour, taste, texture, overall likeness). Results showed that most variables were influenced by the ratio of sweet potato flour and wheat flour, excluding moisture content. The ratio of 80% sweet potato flour : 20% wheat flour resulted in cookies with good characteristics and mostly preffered by parelists. Anthocyamin content of this particular cookies (80%: 20%) was similar to that of sweet potato flour.  Keywords: cookies, purple sweet potato flour, wheat flour   ABSTRAK  Penelitian ini bertujuan untuk menentukan konsentrasi tepung ubi jalar ungu dan tepung terigu yang tepat untuk menghasilkan kue kering ubi jalar ungu dengan kandungan gizi tertentu dan disukai. Rancangan yang digunakan adalah rancangan acak lengkap yang terdiri satu faktor dengan lima taraf perlakuan yaitu : Perbandingan tepung ubi jalar ungu dan tepung terigu 100% : 0%, 80% : 20%, 60% : 40%, 40% : 60%, 20% : 80%. Peubah yang di amati adalah komposisi kimia (penentuan kadar protein, kadar lemak, kadar air, kandungan antosianin) dan uji organoleptik (warna, rasa, tekstur, tingkat kesukaan). Hasil penelitian menunjukan bahwa perlakuan perbadingan tepung ubi jalar ungu dan tepung terigu mempengaruhi peubah-peubah yang diamati, sedangkan untuk kadar air tidak berbeda nyata. Berdasarkan hasil penelitian perlakuan perbandingan tepung ubi jalar ungu dan tepung terigu 80% : 20% dapat menghasilkan kue kering yang terbaik dan disukai. Kandungan antosianin kue kering ubi jalar dengan formulasi 80 : 20% tidak berbeda jauh dengan kandungan antosianin tepung ubi jalar. Kata kunci: kue kering, tepung terigu, tepung ubi jalar ungu

scholarly journals PHYSICAL AND CHEMICAL QUALITY CHARACTERISTICS OF CORN TORTILLAS WITH SUBSTITUTE PURPLE SWEET POTATO FLOUR

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Nurfitrianti Bulotio ◽  
Adnan Engelen ◽  
Nursia Lateka
Keyword(s):  
Sweet Potato ◽  
Quality Characteristics ◽  
Ash Content ◽  
Chemical Quality ◽  
Potato Flour ◽  
A Value ◽  
Sweet Potato Flour ◽  
Purple Sweet Potato ◽  
Physical And Chemical Quality ◽  
Physical And Chemical

This study aimed to test the physical and chemical quality characteristics of corn tortillas with substitute purple sweet potato flour. This study used a completely randomized design (CRD) and LSD test if there was a significant effect. The tests carried out included organoleptic tests, air content analysis, ash content analysis, color analysis and texture analysis. The results showed that the best formulation of tortillas chips was a P4 treatment with the addition of 75% purple sweet potato flour: 25% corn, with a texture value of 4.267, taste 4.75 and aroma 4.56 and for the best color treatment found in the addition of P3 had a value of 4.31. The best treatment in the chemical analysis is the P4 treatment had a color value of -10.93, moisture content of 8.94 and ash content of 2.57. For texture analysis test the highest treatment was P2 treatment with the addition of 25% purple sweet potato flour: 75% corn with a value of 1139.15.

scholarly journals Karakteristik Kimia Biskuit dari Tepung dan Serat Ubi Jalar Ungu

2020 ◽  
Vol 11 (2) ◽  
pp. 64-68
Author(s):  
Stefani Limanto ◽  
Elisa Julianti ◽  
Zulkifli Lubis
Keyword(s):  
Dietary Fiber ◽  
Sweet Potato ◽  
Fiber Content ◽  
Calorie Intake ◽  
Potato Flour ◽  
Total Dietary Fiber ◽  
Insoluble Dietary Fiber ◽  
Daily Energy ◽  
Sweet Potato Flour ◽  
Purple Sweet Potato

Purple sweet potato is one type of tuber that is rich in carbohydrates in the form of starch and fiber. It also contains purple anthocyanin pigments. In this research, purple sweet potato was processed into flour and starch. Starch processing solid waste can be utilized by processing it into fiber flour. Purple sweet potato flour and fiber were then used as the basis for making biscuits at a ratio of 75: 25 and compared to biscuits made from 100% purple sweet potato flour and wheat flour. The resulting biscuits were then analyzed for their chemical characteristics. The results showed that the ratio of flour gave a very significantly different effect on the value of water content, total dietary fiber content, insoluble dietary fiber content and % nutritional adequacy rate of food fiber, and had no significant effect on the value of ash content, protein content, fat content, content carbohydrates, total flavonoids, insoluble dietary fiber content, calorie intake and fulfillment of daily energy adequacy.

scholarly journals Kajian Variasi Lama Perendaman Dalam Larutan Kalsium Hidroksida Pada Pembuatan Tepung Ubi Jalar Ungu

2016 ◽  
Vol 1 (1) ◽  
pp. 969-976
Author(s):  
Teguh Pribadi Gunawan ◽  
Rita Khathir ◽  
Ratna Ratna
Keyword(s):  
Weight Loss ◽  
Vitamin C ◽  
Moisture Content ◽  
Sweet Potato ◽  
Starch Content ◽  
Potato Flour ◽  
Soaking Time ◽  
Sun Drying ◽  
Sweet Potato Flour ◽  
Purple Sweet Potato

Penelitian ini bertujuan untuk mengkaji proses pembuatan tepung ubi jalar ungu dengan variasi lama perendaman dalam larutan kalsium hidroksida. Tahapan proses pembuatan tepung ubi jalar adalah pengupasan, pemotongan membentuk chips dengan ketebalan 1 cm, perendamandalam larutan kalsium hidroksida Ca(OH)2, blanching pada suhu 85oC selama 5 menit, pengeringan bertahap dengan penjemuranselama 2 hari dan pengeringan oven selama 6 jam pada suhu 60oC sampai kadar air 10%, penggilingan dan pengayakan. Perendaman dalam larutan Ca(OH)2 konsentrasi 1.000 ppm dilakukan dengan  variasi lama perendaman 0, 15, 30 dan 60 menit. Parameter yang diamati meliputi rendemen, susut bobot, kadar air, kandungan pati, vitamin C, derajat keasaman, dan warna. Hasil penelitian menunjukkan bahwa rendemen yang dihasilkan pada berbagai variasi lama perendaman dalam larutan Ca(OH)2adalah 10,63%-10,79%, sedangkan kadar air tepung ubi jalar ungu diperoleh pada kisaran 8,4-10,27%. Susut bobot tertinggi diperoleh pada proses pengeringan matahari yaitu mencapai ±36,36%, sedangkan susut bobot terendah terjadi pada proses pengayakan yaitu ±3,13%. Kandungan pati tepung ubi jalar ungu berada pada kisaran 74,47-84,83%. Vitamin Ctepung ubi jalar ungu terendah diperoleh pada perendaman 60 menit sebesar 4,40 mg/100g, sedangkanvitamin C tepung ubi jalar ungu tertinggi diperoleh pada perendaman 0 menit yaitu 17,60 mg/100g. Secara umum dapat disimpulkan bahwa terjadi penurunan vitamin C selama proses penepungan. Derajat keasaman tepung ubi jalar ungu diperoleh pada kisaran 4,96-5,27. Berdasarkan analisis warna diperoleh tepung ubi jalar ungu dengan warna ungu ke kehitaman (perendaman 0 menit), ungu pucat (perendaman 15 menit), ungu pekat (perendaman 30 menit), dan ungu keabu-abuan (perendaman 60 menit).The study aimed to evaluate the purple sweet potato flour processing under variations of soaking time in calcium hydroxide solution. The steps of flour processing were pilling, cutting with a thikcness of 1cm, soaking in calcium hidroxide solution, blanching at a temperature of 85 oC for 5 minutes, drying at two stages i.e sun drying for two day and oven drying for 6 hour at  60oC until 10% moisture content miling and sieving. Soaking in calcium hidroxide  concentration of 1,000 ppm was done by variation soaking time of 0, 15, 30 and 60 minutes. The parameters observed were yield, weight loss, moisture, starch content, vitamin C, acidity, and color. The results showed that the yield generated due to variations of soaking time in calsium hidroxide solution was 10.63-10.79%, while the moisture content of the purple sweet potato flour was in the range of 8.4-10.27%. The highest weight loss was obtained in the sun drying process (±36.36%), while the lowest weight loss was occured in the sieving process (± 3.13%). The starch content of purple sweet potato flour was in the range of 74.47-84.83%. The lowest vitamin C of purple sweet potato flour was obtained after 60 minutes soaking (4.40 mg/100g), while the highest vitamin C of purple sweet potato flour was obtained without soaking (17.60 mg/100g). In general it can be concluded that vitamin C had been declined during the flour processing. The acidity of purple sweet potato flour was in range of 4.96 to 5.27. The  color analysis by using L*a*b method showed that there was differences in color due to the variation of soaking time.

scholarly journals PENGARUH PENAMBAHAN TEPUNG UBI JALAR UNGU (Ipomea batatas L. var. ayamurasaki) TERHADAP KARAKTERISTIK HEALTH-PROMOTING YOGURT

2019 ◽  
Vol 8 (4) ◽  
pp. 341
Author(s):  
Gusti Chandra Rizki ◽  
Komang Ayu Nocianitri ◽  
I Made Sugitha
Keyword(s):  
Antioxidant Activity ◽  
Lactic Acid ◽  
Sweet Potato ◽  
Block Design ◽  
Potato Flour ◽  
Randomized Block Design ◽  
Health Promoting ◽  
Sweet Potato Flour ◽  
Purple Sweet Potato ◽  
The Right

This research aims to identify the effect of adding purple sweet potato flour to the characteristics of health-promoting yogurt and to identify the right concentration of purple sweet potato flour to produce health-promoting yogurt with the best characteristics. This research used a Randomized Block Design (RBD) of the addition of purple sweet potato flour with the concentration of 0%, 2%, 4%, 6%, 8%. Each treatment was repeated 3 times, resulting in 15 experimental units. The data were then Analyzed of Variance (ANOVA) method and if the treatment had an effect on the variable, the Duncan Multiple Range Test (DMRT) were performed. The results showed purple sweet potato flour has significant effect to lactic acid total, pH, antioxidant activity, color, texture, and taste of health-promoting yogurt and did not significantly affect LAB total, hedonic taste, aroma, and overall acceptance. The addition of 8% purple sweet potato flour resulted in the best characteristic under the following criteria: 1.23% of lactic acid total, 3.73 of pH, 90.33% of antioxidant activity, 13.19 log CFU/ml of LAB total, pink color and indefferent color, thick texture rather like, sour taste rather like, flavor and overall acceptance rather like. Keywords: health-promoting yogurt, purple sweet potato flour, antioxidant.  

scholarly journals UJI ORGANOLEPTIK DAN SIFAT KIMIA KUE SEMPRONG CAMPURAN TEPUNG UBI JALAR UNGU (IPOMOEA BATATAS) DAN TEPUNG TERIGU

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Olfita S. Montolalu ◽  
Tineke M. Langi ◽  
Teltje Koapaha
Keyword(s):  
Sweet Potato ◽  
Wheat Flour ◽  
Ipomoea Batatas ◽  
Potato Flour ◽  
Test Results ◽  
Nutritional Characteristics ◽  
Yam Flour ◽  
Sweet Potato Flour ◽  
Purple Sweet Potato ◽  
Purple Yam

ABSTRACTThe aim of this research is to produce a quality semprong cookies by mixing purple sweet potato flour and flour properly, based on the panelists' preference level and the nutritional characteristics of the "semprong" cake. The organoleptic test results of the "semprong" cake which are preferred in terms of color, taste, aroma and texture are treatment A (10g purple yam flour + 90g wheat flour). The results of the proximate content analysis of "semprong" cakes for water content ranged from 3.16% - 3.77%, ash content ranged from 1.32% - 2.09%, fat content ranged from 16.26% - 20.95%, content protein ranges from 7.06% - 8.95%, carbohydrate content ranges from 66.31% - 71.21%.Keywords : Semprong Cake, Purple Sweet Potato Flour, Wheat Flour

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