scholarly journals Stability and Quality of Anthocyanin in Purple Sweet Potato Extracts

Foods ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 393 ◽  
Author(s):  
Chin-Chia Chen ◽  
Chi Lin ◽  
Min-Hung Chen ◽  
Po-Yuan Chiang
Keyword(s):  
Sweet Potato ◽  
Ph Value ◽  
Chromatic Aberration ◽  
Thermal Degradation Kinetics ◽  
Sweet Potatoes ◽  
Antioxidant Power ◽  
Significant Difference ◽  
Purple Sweet Potato ◽  
The Stability

Because of the high nutritional value of anthocyanin in purple sweet potatoes (TN57), the stability and quality of anthocyanin in purple sweet potatoes during and after the processing were investigated in this study. First of all, the extraction methods with different parameters, such as temperature, time, solid-liquid ratio, pH value, and solvent were employed to get better extraction efficiencies. After that, DPPH (1,1-diphenyl-2-picrylhydrazyl) and ABTS (2,2′-azino-bis (3-ethylbenz thiazoline-6-sulphonic acid) were used to evaluate the anti-oxidation ability of the extracts. Lastly, the thermal degradation kinetics and photodegradation were used to obtain important degradation factors including the content of anthocyanin residue, degradation index (DI), color parameters, reaction rate (k), and chromatic aberration (ΔE). We found that the extraction condition as using 60% ethanol with 1% citric acid under 80 °C for 40 min was optimal for purple sweet potatoes, which obtained antioxidant capacity as 333 μM TE DPPH, 376 μM TE ABTS+, and 593.6 μM TE ferric ion reducing antioxidant power (FRAP). The results indicate that the most important parameter for the stability of anthocyanin in the purple sweet potato extract (PSPAE) was the pH value rather than temperature. In addition, there was no significant difference in chromatic aberration between the light and dark storage conditions under 37 °C. Thus, PSPAE has the potential to be developed as health foods and drinks rich in anthocyanin.

scholarly journals Additions concentration of encapsulant on biang clone purple sweet potatoes "chips" as natural dye powder

2018 ◽  
Vol 1 (2) ◽  
pp. 1
Author(s):  
Hari Hariadi ◽  
Marleen Sunyoto ◽  
Bambang Nurhadi ◽  
Agung Karuniawan
Keyword(s):  
Experimental Method ◽  
Sweet Potato ◽  
Ph Value ◽  
Natural Dye ◽  
Concentration Addition ◽  
Anthocyanin Pigment ◽  
Sweet Potatoes ◽  
Total Anthocyanin ◽  
Purple Sweet Potato ◽  
Physical And Chemical

The purpose of this study was to obtain maltodextrin with the appropriate concentration of purple sweet potato anthocyanin extract to produce the natural dye powder preparations with the best physical and chemical characteristics. The research method used is Experimental Method (Experimental Method) by using Group Random Design (GRD). The experiment consisted of three treatments and each was repeated four times, with the treatment obtained in cassava purple with a concentration of 35.4 mg / 100gr anthocyanin extract.  The  next  stage  was  to  determine  the  best  concentration  of  maltodextrin Consisting of four treatments and each repeated three times. The anthocyanin pigment powder of purple sweet potato with various treatments of maltodextrin concentration addition gave a significant effect on the soluble time, and yield, but did not gave a significant effect on total of anthocyanin, hygroscopicity and solubility. The treatment 10% of maltodextrin concentration addition resulted in best characteristic with total anthocyanin of 48.43 mg / L, color intensity L * (brightness) of 37.86, a * (redness) of 43.66, b * (yellow) of 21.68, water content of 5.56%, hygroscopicity of 11.62%, solubility of  97.13%, soluble time of 159 seconds, pH value of 3.04, and yield of 31.38%. The resulting anthocyanin powder shows that the anthocyanin pigment powder of purple sweet potato with the maltodextrin concentration addition has the potential to serve as a natural dye powder for food and beverages.

scholarly journals The influence of addition of various sweet potatoes (Ipomea batatas) extract to total count of cells and antioxidant activity in yogurt

2009 ◽  
Vol 7 (2) ◽  
pp. 68-76
Author(s):  
RETNATI RETNATI ◽  
M.A.M. ANDRIANI ◽  
GUSTI FAUZA
Keyword(s):  
Antioxidant Activity ◽  
Sweet Potato ◽  
Skim Milk ◽  
Total Count ◽  
Sweet Potatoes ◽  
Fresh Milk ◽  
Ipomea Batatas ◽  
Significant Difference ◽  
Potato Extract ◽  
Purple Sweet Potato

Retnati, Andriani MAM, Fauza G. 2009. The influence of addition of various sweet potatoes (Ipomea batatas) extract to total count of cells and antioxidant activity in yogurt. Biofarmasi 7: 68-76. The aim of this research was to determine the influence of addition of various sweet potatoes extract to the total count of cells and the antioxidant activity in yogurt. Yogurt was made from fresh milk, skim milk, white sweet potato, orange sweet potato, purple sweet potato, and pure culture of Streptococcus thermophilus 0040 and Lactobacillus bulgaricus 0041 in straight MRS agar. Fresh milk, skim milk powder (5%, b/v), and sweet potato extract (10%, v/v) was pasteurized at 90oC for 15 minutes, cooled to the temperature between 40-45oC, inoculated with 2.5% S. thermophilus and L. bulgaricus with a proportion of 1.4:1, and then incubated at a temperature of 40oC for 15 hours. Yogurt without an addition of sweet potato extract was used as control. The parameters measured in this experiment were the total count of cells with TPC (Total Plate Count) method and the antioxidant activity with DPPH (2,2- diphenyl-1-picrylhydrazyl) method. Samples were taken at one hour interval to examine the total count of cells, while the antioxidant activity was collected at three hours interval. The result of each analysis was plotted into graphics which describing the relation of total bacteria and antioxidant activity with fermentation time. ANOVA was employed to analyze the data. If there was a significant difference, it should be followed by Duncan Multiple Range Test (DMRT) at a significance level α=0.05. The result of this research showed that the addition of various sweet potatoes extracts increased the total count of cells and the antioxidant activity in yogurt. The total count of cells showed no significant different for each sample, it meant that the different colors in sweet potato did not influence the total count of cells. However, yogurt with orange and purple sweet potato extract addition had a significant difference on the antioxidant activity with control and yogurt with white sweet potato extract. In conclusion, the difference colors in sweet potato influenced in the antioxidant activity in yogurt significantly. Sweet potato is potential for milk substitute in yogurt production due to oligosaccharide content and antioxidant activity.

scholarly journals Pemanfaatan Lactobacillus plantarum 1 dan Pewarna Alami Berbahan Nabati Dalam Pembuatan Tapai Probiotik

2020 ◽  
Vol 12 (1) ◽  
pp. 9-15
Author(s):  
Yusmarini Yusmarini ◽  
Shanti Fitriani ◽  
Vonny Setiaries Johan ◽  
Rahmayuni Rahmayuni ◽  
Vita F. Artanti
Keyword(s):  
Lactobacillus Plantarum ◽  
Sweet Potato ◽  
Ph Value ◽  
Natural Dyes ◽  
Sweet Potatoes ◽  
Fruit Extract ◽  
Narrow Leaf ◽  
Dragon Fruit ◽  
Potato Extract ◽  
Purple Sweet Potato

Tapai is one of the typical Indonesian fermented products. This research utilized Lactobacillus plantarum 1 RN2-53 and natural dyes made from plants in the production of cassava tapai. The objectives of this research were to improve the quality of probiotic cassava tapai and to obtain the chemical, microbiological and sensory characteristics of the cassava tapai. Natural dyes used were purple sweet potato extract, red dragon fruit extract and narrow-leaf pleomele extract. The results showed that cassava tapai made with the addition of Lactobacillus plantarum 1 RN2-53 and the addition of natural dyes from plants had different chemical and microbiological characteristics. Tapai made with the addition of red dragon fruit extract generally had a lower pH value and a higher total titrated acid compared to tapai made with the addition of purple sweet potato extract and narrow-leaf pleomele extract, but the alcohol content of tapai made with the addition of purple sweet potatoes extract was higher than the others. The number of lactic acid bacteria was around 109 and had met the probiotic food criteria.

EFFECT OF HEAT TREATMENT ON THE ANTIOXIDANT ACTIVITIES OF TWO CULTIVARS OF SWEET POTATOES

2016 ◽  
Vol 78 (6-12) ◽  
Author(s):  
Amir H. M. S. ◽  
Nurun N. ◽  
Nida Iqbal ◽  
Nur F. R. ◽  
Lee L. H. ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Antioxidant Activities ◽  
Sweet Potatoes ◽  
Moist Heat ◽  
Dry Heat ◽  
Significant Difference ◽  
Ic50 Values ◽  
Purple Sweet Potato

Natural sources of antioxidants are derived from fruits, vegetables and wine, whilst artificial supplements are from teas and spices. Sweet potato (Ipomoea batatas) is an excellent natural source of vitamins and minerals, and likely a great source of antioxidant. The objective of this study  is to analyze the antioxidant activity of orange sweet potato (Vitato) and  purple sweet potato (All purple), prepared as heat dry and  moist heat for 30 minutes at 100oC. All the samples were obtained from Pasir Puteh and MARDI Telong, Bachok, Kelantan, respectively. Both samples were soaked into methanol to obtain the crude extract prior to analyzing for antioxidant activity by using 2, 2-diphenyl-1-picryl hydrazyl (DPPH). IC50 values of dry heat and moist heat Vitato were 0.40mg/L and 0.20mg/L while dry heat and moist heat, All purple were 0.32mg/L and 0.19mg/L, respectively. Both moist heat samples enjoyed higher scavenging activities compared to dry heat samples. However, the All purple sample of moist heat is the most superior one. Significant difference of IC50values between dry heat and moist heat sample differ significantly. Thus, this study clearly demonstrated that moist heat sweet potato exhibited  excellent increase in antioxidant activity.

Study on Browning Degree of Fresh-Cut Purple Sweet Potato and its Inhibition during Storage

2013 ◽  
Vol 712-715 ◽  
pp. 409-414
Author(s):  
Lu Gao ◽  
Ke Da Li ◽  
Min Peng Zhu ◽  
Ying Chang Li
Keyword(s):  
Sweet Potato ◽  
Control Method ◽  
Orthogonal Design ◽  
Enzymatic Browning ◽  
Sweet Potatoes ◽  
Basic Study ◽  
The Third ◽  
Fresh Cut ◽  
Purple Sweet Potato

The basic study on activity of polyphenol oxidase (PPO) from purple sweet potato (PSP) and its control method was mainly carried out by spectrophotometry. The PPO activity and browning degree (BD) of PSP peel were higher than those of inner-tissue and intact sweet potatoes. The relativity between them was positive, and relativity coefficient was 0.9895. The activity of PPO extracted from sliced PSP increased initially and decreased afterwards, with the highest activity of PPO on the third day during storage. And BD increased very quickly as time went by, especially in the first three days. The relativity between PPO activity and BD was negative, and relativity coefficient was-0.8747. The result indicated that the browning of fresh-cut PSP slices during storage was mainly due to PPO in it. The composite inhibitor was optimized by the orthogonal design, and the addition of0.05% L-cysteine+0.03% phytic acid+0.3% ascorbic acid+0.3% citric acidwould markedly inhibit the enzymatic browning caused by PPO and improve the quality of fresh-cut PSP slices.

scholarly journals Fortification of goat milk with purple sweet potato (Ipomea batatas l.) extract and its effects on functional cheese

2019 ◽  
Vol 3 (2) ◽  
pp. 8-13
Author(s):  
I Nyoman Sumerta Miwada ◽  
IN.S. Sutama ◽  
IK. Sukada ◽  
L. Doloksaribu
Keyword(s):  
Sweet Potato ◽  
Ph Value ◽  
Goat Milk ◽  
Antioxidant Content ◽  
Randomized Design ◽  
Ipomea Batatas ◽  
Potato Extract ◽  
Purple Sweet Potato

This study was undertaken to analyze the quality of goat milk based cheese particularly its potential high antioxidant content through fortification of goat milk with purple sweet potato extract. A completely randomized design was used to determine the characterization of goat milk based cheese quality through five levels i.e. 0% (A); 2% (B); 4% (C); 6% (D) and 8% w/v (E) of purple sweet potato extract fortification in goat milk. The results showed that the increased level of fortification by purple sweet potato extract in goat milk based cheese significantly increased the pH value of the cheese (P<0.05) where the highest pH was 6.20 at the level of 4%  w/v. Meanwhile, the yield and total of cheese acid were not affected by the fortification. The content of cheese protein significantly decreased (P<0.05) by the increasing level of fortification by purple sweet potato in goat milk. Goat milk-based cheese on the E treatment contained the lowest protein (19.42%). Functional potency of the cheese increased significantly (P<0.05) when the level of fortification was increased. The highest antioxidant content in goat milk based cheese was 114.47 mg/L. GAEAC at 8% w/v level. In conclusion, by increasing fortified goat milk by purple sweet potato extract up to 8% w/v was able to potentially produce cheese containing a high antioxidant.

scholarly journals Additions Concentration of Encapsulant on Biang Clone Purple Sweet Potatoes "Chips" As Natural Dye Powder

2018 ◽  
Vol 1 (2) ◽  
pp. 1-14
Author(s):  
Marleen Sunyoto ◽  
◽  
Hari Hariadi ◽  
Bambang Nurhadi ◽  
Agung Karuniawan ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Ph Value ◽  
Natural Dye ◽  
Concentration Addition ◽  
Anthocyanin Pigment ◽  
Color Intensity ◽  
Sweet Potatoes ◽  
Total Anthocyanin ◽  
Purple Sweet Potato ◽  
Physical And Chemical

The purpose of this study was to obtain maltodextrin with the appropriate concentration of purple sweet potato anthocyanin extract to produce natural dye powder preparations with the best physical and chemical characteristics. The research method used is Experimental Method) by using Group Random Design (GRD). The experiment consisted of three treatments and each was repeated four times, with the treatment obtained in cassava purple with a concentration of 35.4 mg/100gr anthocyanin extract. The next stage was to determine the best concentration of maltodextrin Consisting of four treatments and each repeated three times. The anthocyanin pigment powder of purple sweet potato with various treatments of maltodextrin concentration addition gave a significant effect on the soluble time, and yield, but did not give a significant effect on the total of anthocyanin, hygroscopicity and solubility. The treatment 10% of maltodextrin concentration addition resulted in best characteristic with total anthocyanin of 48.43 mg / L, color intensity L* (brightness) of 37.86, a* (redness) of 43.66, b* (yellow) of 21.68, water content of 5.56%, hygroscopicity of 11.62%, solubility of 97.13%, soluble time of 159 seconds, pH value of 3.04, and yield of 31.38%. The resulting anthocyanin powder shows that the anthocyanin pigment powder of purple sweet potato with the maltodextrin concentration addition has the potential to serve as a natural dye powder for food and beverages.

scholarly journals PEMANFAATAN AMPAS KEDELAI PADA PEMBUATAN BROWNIES “GLUTEN FREE” UBI JALAR UNGU DAN UJI KELAYAKANNYA

AGROINTEK ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 1-13
Author(s):  
Arnida Mustafa ◽  
Ela Elliyana
Keyword(s):  
Sweet Potato ◽  
Natural Fiber ◽  
Preference Test ◽  
The Body ◽  
Sweet Potatoes ◽  
South Sulawesi ◽  
Soybean Paste ◽  
Randomized Design ◽  
Purple Sweet Potato

Soybean pulp is a byproduct of tofu processing and soy milk. The nutrients contained in soybean dregs are still significantly high, especially protein and fiber. So far, processing of soybean pulp into food is still limited. Tuber has many benefits for the body, and has a high nutritional content and can be used as a food substitution. One of the tubers that can be processed as a substitute is purple sweet potato. The natural fiber of oligosaccharides or anti-nutrition substances stored in purple sweet potatoes is a valuable commodity for processed food products, such as brownies. This study aims to determine the quality, physicochemical and organoleptic properties produced by brownies. The study was organised using a completely randomized design (CRD) with a comparison treatment of soybean pulp paste and purple sweet potato paste including (1) 60%, 50%, 40% and (2) 40%, 50%, 60%. Each treatment was repeated three times. The study was conducted at the Pangkep State Agricultural Polytechnic Biochemistry Laboratory (PPNP) of South Sulawesi. The results of the study obtained the best quality of brownies on physicochemical properties in treatment D (A3B3), by the concentration of 40% soybean paste paste and 60% purple sweet potato paste for water content (25.76%), ash (1.01%), fat (14.56%), carbohydrate (43.32%), and protein (18.95%). The best growth power test for the physical quality of brownies is in treatment D (A3B3) with a concentration of 40% soybean pulp paste treatment and 60% purple sweet potato paste (6.4 cm). The best panelist's level of preference test was in treatment D (A3B3) with a concentration of 40% soybean paste paste treatment and purple sweet potato paste 60% for color (4.28%), aroma (3.95%), flavor (4.47% ) and texture (4.42%).

scholarly journals Smart Label with Color Indicator Made of Purple Sweet Potato (Ipomoea Batatas L.) on The Bottle Packaging of Pasteurized Milk

2021 ◽  
Vol 2 (3) ◽  
pp. 12-19
Author(s):  
Andrew Setiawan Rusdianto ◽  
Desita Wirda Ramadhan
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Storage Temperature ◽  
Ph Value ◽  
Pasteurized Milk ◽  
Color Changes ◽  
Purple Color ◽  
Purple Sweet Potato ◽  
Smart Label

Smart label has made it possible to monitor and communicate information about the quality of packaged foods. Smart label is immobilized with natural dyes that are sensitive to changes in pH, namely anthocyanins. The product used in this research is pasteurized milk. The pH quality of milk will affect the storage temperature. The purpose of this study was to develop a prototype smart label of purple sweet potato’s anthocyanin extract and to determine the feasibility of a smart label on the packaging as an indicator of milk freshness. Purple sweet potato extract was obtained by the maceration method using 96% ethanol and aquadest, which was acidified with acetic acid. The anthocyanin extract had a pH value of 5.60 ± 0.015 and an anthocyanin value of 70,163 ± 0.889 mg/100 g. The smart label shows milk freshness indicated by the changes in color. While a purple color indicates fresh milk, a faded purple color indicates that the milk is fairly fresh, and a reddish-purple smart label indicates the milk is not fresh. At room temperature storage, stale milk at 12 hours has a pH value of 5.84 ± 0.022 and a total microbe of 5.81 log10 or 6.5 x 105. In cold storage, stale milk on day 6 has a pH value of 5.92 ± 0.017 and a total microbe of 6.08 log10 or 1.2 x 106. The results of the feasibility of smart labels on pH stability indicate color changes in both acidic and alkaline conditions, but more stability is evident in acidic conditions.

scholarly journals Senduduk dan ubi jalar ungu sebagai pewarna preparat squash akar bawang merah

2020 ◽  
Vol 5 (1) ◽  
pp. 46-55
Author(s):  
Ivan Eldes Dafrita ◽  
Mustika Sari
Keyword(s):  
Sweet Potato ◽  
Root Tip ◽  
Sweet Potatoes ◽  
Onion Root ◽  
Melastoma Malabathricum ◽  
Randomized Design ◽  
Ipomea Batatas ◽  
Potato Extract ◽  
Purple Sweet Potato

Pembuatan preparat untuk pengamatan sel atau jaringan pada kegiatan praktikum membutuhkan bahan pewarna. Bahan pewarna yang sering dugunakan adalah bahan kimia sintetik. Eksplorasi pemanfaatan bahan pewarna alternatif yang murah dan mempunyai afinitas tinggi terhadap komponen sel dilakukan dengan pemanfaatan pewarna alami yang dihasilkan oleh antosianin yang terdapat pada buah senduduk dan ubi jalar ungu. Penelitian ini menggunakan rancangan acak lengkap (RAL) dengan 1 faktor perlakuan yaitu waktu pewarnaan 60, 90, dan 120 menit. Analisis data dilakukan dengan deskriptif kualitatif terhadap kualitas preparat dan kelayakan preparat. Berdasarkan hasil penelitian kualitas preparat yang diwarnai dengan ekstrak buah senduduk dan ubi jalar ungu menunjukan hasil terbaik pada lama pewarnaan 90 menit dengan persentase 83,33% dan 53,33%. Kualitas preparat yang diwarnai dengan ekstrak buah senduduk lebih baik daripada yang diwarnai dengan ekstrak ubi jalar ungu Preparat mitosis akar bawang merah yang diwarnai dengan ekstrak buah senduduk dan ekstrak ubi jalar ungu dinyatakan sangat layak untuk digunakan sebagai preparat pada kegiatan praktikum pembelahan sel.Kata kunci: Preparat squash, senduduk, ubi jalar ungu, akar bawang merah Senduduk and sweet potatoes as staining for squash preparations of onion root tip. The exploration for the use of alternative dyes that are cheap and has a high affinity for cell components is carried out by the use of natural dyes produced by anthocyanins found in fruit Melastoma malabathricum, and sweet potato Ipomea batatas var. Ayumurakasi. The study design was a completely randomized design (CRD) with 1 factor, coloring time 60, 90, and 120 minutes. The data analysis was performed by descriptive qualitative of the quality of the preparations and the suitability of the preparations. Based on the results of the study the quality of the preparations stained with extracts of Senduduk fruit and purple sweet potato showed the best results in the staining time is 90 minutes with a percentage is 83.33% and 53.33%. The quality of the preparations stained with Senduduk fruit extract is better than that which is colored with purple sweet potato extract. Mitosis specimens of onion root stained with extracts of Senduduk fruit and purple sweet potato extract were declared very feasible to be used as a specimen for cell division practical activities.Keywords: Squash preparations, melastoma malabathricum, sweet potatoes, onion root tip.

Sign in / Sign up

Export Citation Format

Share Document