Effect of Spontaneous Lactic Acid Fermentation on Physico-Chemical Properties of Sweet Potato Flour

Sweet potato is one type of tubers found in Indonesia. Hybrid 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 hybrid 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 hybrid sweet potato flour. The results showed that various types of hybrid 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 hybrid 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 hybrid sweet potato flour and the highest value was obtained from the Japanese hybrid sweet potato flour var.Ayamurasaki.

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KARAKTERISTIK CAKE YANG DIBUAT DENGAN SUBTITUSI CAMPURAN TEPUNG PISANG BATU (Musa balbisiana colla) DAN UBI JALAR KUNING (Ipomea batatus L.)

Berkala Ilmiah Pertanian ◽

10.19184/bip.v2i2.16170 ◽

2019 ◽

Vol 2 (2) ◽

pp. 56

Author(s):

Nugroho Setya Budi ◽

Yhulia Praptiningsih ◽

Maryanto Maryanto

Keyword(s):

Sweet Potato ◽

Wheat Flour ◽

Starch Content ◽

Chemical Properties ◽

Loaf Volume ◽

Potato Flour ◽

Organoleptic Characteristics ◽

High Preference ◽

Banana Flour ◽

Sweet Potato Flour

ABSTRACT Cake is made from wheat flour, sugar, and eggs. The supply of wheat flour depends on wheat import. The wheat imports predicted to continue to increase, so it is necessary to find an alternative to reduce the use of wheat flour as a primary ingredient of cake sourced from local raw materials which low utilized. Balbisiana banana was a low class of banana which had a low optimal utilization because it was disliked by the people. Balbisiana banana had a dark lightness so it was needed to add the yellow sweet potato flour to increase the brightness of the cake. Balbisiana banana and yellow sweet potato flour could be used as wheat to substitution because had high starch content, good nutritional value and low IG value. The purpose of this research was to know the influence of the proportion of balbisiana banana and yellow sweet potato flour on the physical and organoleptic characteristics of cake, to know the proportion of balbisiana banana and yellow sweet potato flour on cake with good properties and high preference, and chemical properties of cake high preference. The results showed that the proportion of balbisiana banana and yellow sweet potato flour significantly affected on color (lightness), loaf volume, and staleness, and there were difference on preference of color, flavor and overall but not difference taste and staleness (p <0.05). Cakes with good properties and high preference were P5 (10% balbisiana banana flour: 40% yellow sweet potato flour) and P6 (50% yellow sweet potato flour). This cake had moisture content 26,21% - 27,58%, ash content 1,19% - 1,26%, fat content 20,42% - 21,23%, protein content 11,45% - 11,74%, and carbohydrate content 38,26% - 40,65%. Keywords: balbisiana banana flour, yellow sweet potato, cake ABSTRAK Cake adalah kue berbahan dasar terigu, gula, dan telur. Ketersediaan terigu tergantung pada hasil impor gandum. Impor terigu diprediksi akan terus mengalami peningkatan, sehingga perlu dicari alternatif untuk mengurangi penggunaan terigu sebagai bahan dasar cake yang bersumber dari bahan baku lokal yang belum termanfaatkan secara optimal. Pisang batu termasuk pisang kelas rendah yang pemanfaatannya kurang optimal karena kurang disukai. Tepung pisang batu memiliki warna cenderung gelap sehingga perlu penambahan tepung ubi jalar kuning untuk meningkatkan kecerahan warna cake. Tepung pisang batu dan ubi jalar kuning dapat digunakan sebagai bahan substitusi terigu karena adanya kandungan pati yang tinggi, memiliki nilai nutrisi yang baik dan juga memiliki nilai IG yang rendah. Tujuan dari penelitian ini adalah mengetahui pengaruh proporsi tepung pisang batu dan tepung ubi jalar kuning terhadap karakteristik fisik dan organoleptik cake, mengetahui proporsi dengan tepung pisang batu dan tepung ubi jalar kuning pada cake dengan sifat-sifat yang masih baik dan disukai, serta kandungan kimia cake perlakuan yang masih baik. Hasil penelitian menunjukkan bahwa proporsi tepung pisang batu dan tepung ubi jalar kuning berpengaruh nyata terhadap warna (lightness), daya kembang, dan staleness, serta terdapat perbedaan tingkat penerimaan panelis terhadap parameter warna, aroma dan keseluruhan namun tidak terdapat perbedaan tingkat penerimaan panelis terhadap parameter rasa dan tekstur (p<0,05). Cake dengan sifat-sifat yang masih baik dan disukai terdapat pada proporsi P5 (10% tepung pisang batu: 40% tepung ubi jalar kuning) dan P6 (50% tepung ubi jalar kuning). Karakteristik kimia cake yang masih baik mengandung kadar air 26,21% - 27,58%, kadar abu 1,19% - 1,26%, kadar lemak 20,42% - 21,23%, kadar protein 11,45% - 11,74%, dan kadar karbohidrat 38,26% - 40,65%. Kata kunci: pisang batu; ubi jalar kuning; cake

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

Jurnal Ilmu dan Teknologi Pangan (ITEPA) ◽

10.24843/itepa.2019.v08.i04.p01 ◽

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.

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Lactic Acid Fermentation of β-Carotene Rich Sweet Potato (Ipomoea batatas L.) into Lacto-juice

Plant Foods for Human Nutrition ◽

10.1007/s11130-007-0043-y ◽

2007 ◽

Vol 62 (2) ◽

pp. 65-70 ◽

Cited By ~ 29

Author(s):

Smita H. Panda ◽

Ramesh C. Ray

Keyword(s):

Lactic Acid ◽

Sweet Potato ◽

Ipomoea Batatas ◽

Lactic Acid Fermentation ◽

Acid Fermentation ◽

Β Carotene

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Effects of Lactic Acid Fermentation on the Retention of Β-Carotene Content in Orange Fleshed Sweet Potatoes

International Journal of Food Studies ◽

10.7455/ijfs/3.1.2014.a2 ◽

2014 ◽

Vol 3 (1) ◽

Cited By ~ 10

Author(s):

Benard O. Oloo ◽

A. A. Shitandi ◽

S. Mahungu ◽

J. B. Malinga ◽

Rose B. Ogata

Keyword(s):

Lactic Acid ◽

Sweet Potato ◽

Titratable Acidity ◽

Lactic Acid Fermentation ◽

Process Conditions ◽

Sweet Potatoes ◽

Acid Fermentation ◽

Carotene Content ◽

Fermentation Time ◽

Β Carotene

This study aimed to establish the effects of lactic fermentation on the levels of β-carotene in selected orange fleshed sweet potato (OFSP) varieties from Kenya. Furthermore,it sought to demonstrate fermentation as a potential process for making new products from sweet potato with enhanced nutraceutical attributes. The varieties (Zapallo, Nyathiodiewo and SPK004/06) were fermented with Lactobacillus plantarum MTCC 1407 at 25 ± 2°C for 48 h and kept for 28 days to make lacto-pickles. During fermentation both analytical [pH, titratable acidity (TA), lactic acid (LA), starch, total sugar, reducing sugar (g/kg roots), texture (N/m2), β-carotene (mg/kg roots)] and sensory (texture, taste, flavour and after taste) attributes of sweet potato lacto-juice were evaluated. Process conditions were optimized by varying brine levels, with fermentation time. A UV-visible spectrophotometer was used to identify and quantify β-carotene. Any significant variations (p < 0.05) in analytical attributes between the fermented and unfermented samples (pH, LA, TA and β-carotene concentration) of lacto-pickles, prepared from the potato roots, were assessed. The study reported a final composition of 156.49mg/kg, 0.53mg/kg, 0.3N/m2, 1.3g/kg, 5.86g/kg, 0.5g/kg and 5.86g/kg for β-carotene, Ascorbic acid, texture; Starch, total sugars, LA and TA respectively, and a pH of 3.27. The fermented products were subjected to flavour profiling by a panel. The product sensory scores were 1.5 to 2.5 on a 5 point hedonic scale, ranging from dislike slightly to like much. The products with brine levels at 4 and 6% were most preferred. The retention of β-carotene was 93.97%. This demonstrated lactic acid fermentation as a better method for processing OFSP as the main nutritional attributes are retained. The final product was resistant to spoilage microorganisms after 28 days of fermentation. Further preservation could be obtained by addition of sodium metabisulphite. In conclusion, Lactic acid fermentation using L. plantarum is a novel method of producing Lacto pickles from Zapallo OFSP, with 93.97% β-carotene retention and adequate shelf life.

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PENGARUH VARIASI KONSENTRASI DAN LAMA PERENDAMAN ASAM LAKTAT TERHADAP KADAR GLUKOSA DAN KUALITAS TEPUNG UBI JALAR (Ipomoea batatas L)

Florea Jurnal Biologi dan Pembelajarannya ◽

10.25273/florea.v3i1.788 ◽

2016 ◽

Vol 3 (1) ◽

pp. 52

Author(s):

Ruly Fitri Nurani

Keyword(s):

Lactic Acid ◽

Sweet Potato ◽

Acid Concentration ◽

Ipomoea Batatas ◽

Potato Flour ◽

Lactic Acid Concentration ◽

Sweet Potatoes ◽

Soaking Time ◽

Sweet Potato Flour ◽

Food Commodities

Dependence on certain essential food commodities has led to the difficulty of overcoming food availability. One of the food that has potential as a substitute for staple foods are sweet potatoes. The purpose of this study was to determine the effect of variations in the lactic acid concentration and soaking time on the glucose contant and quality sweet potato flour. The research is quantitative with RAL factorial 2 x 1 in 3 times repetition. The factor of research are variation of lactic acid concentration (0%, 0.5%, 1%, and 1.5%) and variation of lactic acid soaking time (30 minutes, 60 minutes, 90 minutes).Research use titration Na-tiosulfat to collect the data of glucose contant. Anava two tail is used to examine the hypothesis continued with BNJ examination. The result of hypothesis shows that sig t (variation of lactic acid concentration and variation of lactic acid soaking time) for glucose contant in sweet potato flour 0,000 with significance degree 0,05. From result above, the conclusion is variation of lactic acid concentration and variation of lactic acid soaking time affect the glucose contant and quality sweet potato flour.

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Lactic acid fermentation of anthocyanin-rich sweet potato (Ipomoea batatasL.) into lacto-juice

International Journal of Food Science & Technology ◽

10.1111/j.1365-2621.2007.01692.x ◽

2009 ◽

Vol 44 (2) ◽

pp. 288-296 ◽

Cited By ~ 21

Author(s):

Smita H. Panda ◽

Samir K. Naskar ◽

Paramasivan Sethuraman Sivakumar ◽

Ramesh C. Ray

Keyword(s):

Lactic Acid ◽

Sweet Potato ◽

Lactic Acid Fermentation ◽

Acid Fermentation

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Effects of Lactic Acid Fermentation on the Retention of Β-Carotene Content in Orange Fleshed Sweet Potatoes

International Journal of Food Studies ◽

10.7455/ijfs.v3i1.187 ◽

2014 ◽

Vol 3 (1) ◽

Author(s):

Benard O. Oloo ◽

A. A. Shitandi ◽

S. Mahungu ◽

J. B. Malinga ◽

Rose B. Ogata

Keyword(s):

Lactic Acid ◽

Sweet Potato ◽

Titratable Acidity ◽

Lactic Acid Fermentation ◽

Process Conditions ◽

Sweet Potatoes ◽

Acid Fermentation ◽

Carotene Content ◽

Fermentation Time ◽

Β Carotene

This study aimed to establish the effects of lactic fermentation on the levels of β-carotene in selected orange fleshed sweet potato (OFSP) varieties from Kenya. Furthermore,it sought to demonstrate fermentation as a potential process for making new products from sweet potato with enhanced nutraceutical attributes. The varieties (Zapallo, Nyathiodiewo and SPK004/06) were fermented with Lactobacillus plantarum MTCC 1407 at 25 ± 2°C for 48 h and kept for 28 days to make lacto-pickles. During fermentation both analytical [pH, titratable acidity (TA), lactic acid (LA), starch, total sugar, reducing sugar (g/kg roots), texture (N/m2), β-carotene (mg/kg roots)] and sensory (texture, taste, flavour and after taste) attributes of sweet potato lacto-juice were evaluated. Process conditions were optimized by varying brine levels, with fermentation time. A UV-visible spectrophotometer was used to identify and quantify β-carotene. Any significant variations (p < 0.05) in analytical attributes between the fermented and unfermented samples (pH, LA, TA and β-carotene concentration) of lacto-pickles, prepared from the potato roots, were assessed. The study reported a final composition of 156.49mg/kg, 0.53mg/kg, 0.3N/m2, 1.3g/kg, 5.86g/kg, 0.5g/kg and 5.86g/kg for β-carotene, Ascorbic acid, texture; Starch, total sugars, LA and TA respectively, and a pH of 3.27. The fermented products were subjected to flavour profiling by a panel. The product sensory scores were 1.5 to 2.5 on a 5 point hedonic scale, ranging from dislike slightly to like much. The products with brine levels at 4 and 6% were most preferred. The retention of β-carotene was 93.97%. This demonstrated lactic acid fermentation as a better method for processing OFSP as the main nutritional attributes are retained. The final product was resistant to spoilage microorganisms after 28 days of fermentation. Further preservation could be obtained by addition of sodium metabisulphite. In conclusion, Lactic acid fermentation using L. plantarum is a novel method of producing Lacto pickles from Zapallo OFSP, with 93.97% β-carotene retention and adequate shelf life.

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