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.

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.

Pengaruh Profilaksis Ekstrak Ubi Jalar Ungu (Ipomoea batatas L.) terhadap Kadar Malondialdehida Hepar Tikus Putih (Rattus norvegicus) Jantan Galur Wistar yang Diinduksi Karagenan

2018 ◽  
Vol 15 (2) ◽  
pp. 146
Author(s):  
BRILIAN DINANTI ◽  
FITRI HANDAJANI
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Wistar Rats ◽  
Group Method ◽  
Control Group ◽  
Intraplantar Injection ◽  
Significant Difference ◽  
Male Wistar Rats ◽  
Potato Extract ◽  
Purple Sweet Potato

<p>Liver is an organ with complex metabolism. When the liver is inflamed, cellular immunity will defend against inflammatory agents by stimulating immune cells to produce reactive oxygen species (ROS). Excessive ROS accumulation cause oxydative stress with increased  liver malondialdehyde (MDA) level. Some researches showed that purple sweet potato contain flavonoids (anthocyanins) that functioned as antioxydants. This study aimed to show the prophylactic effect of purple sweet potato extract to the liver MDA level of male Wistar rats induced by carrageenan.</p><p>This study used post-only control group method using 18 male Wistar rats divided into 3 groups: group of rats without treatment, group of rats induced by 0,1 ml of 1% carrageenan by intraplantar injection on day-8, and group of rats given with 872 mg/kgBW of purple sweet potato extract for 7 days and induced by 0,1 ml of 1% carrageenan. In the end of the study, the liver MDA levels were measured by Thio-Barbituric Acid method on each groups.</p><p>The results of One-Way ANOVA test showed there was no significant difference (p = 0,290) between group of rats without treatment (<em>x̅</em>= 207,50) and group of rats induced by carrageenan (<em>x̅</em>=233,17). Then, there is no significant difference (p = 0.978) between group of rats induced by carrageenan and group of rats given with prophylactic purple sweet potato extract and induced by carrageenan (<em>x̅</em>= 232,50).</p><p>The conclusion of this study is giving intraplantar injection of carrageenan can increase liver MDA level insignificantly and giving prophylactic purple sweet potato extract has an effect to decrease the liver MDA level of rats induced by carragenan insignificantly because it contains anthocyanins as antioxidants.</p><p> </p><strong>Keywords: </strong>Liver, <em>Ipomoea batatas</em> L., Malondialdehyde, Anthocyanins

scholarly journals PENGARUH PENAMBAHAN Eucheuma cottonii DAN Sargassum sp. TERHADAP KOMPOSISI KIMIA, AKTIVITAS ANTIOKSIDAN SERTA SIFAT SENSORI SELAI UBI JALAR UNGU (Ipomoea batatas Poir)

2020 ◽  
Vol 3 (1) ◽  
pp. 43
Author(s):  
Umi Kalsum ◽  
Asnani Asnani ◽  
Kobajashi Togo Isamu
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Water Content ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Sensory Properties ◽  
Crude Fiber ◽  
Test Results ◽  
Purple Sweet Potato ◽  
Eucheuma Cottonii

The effect of addition of Eucheuma cotttonii and Sargassum sp. on chemical composition, antioxidant activity and sensory properties of purple sweet potato jam (Ipomoea batatas Poir) ABSTRACT         This study aims to determine the effect of the addition of Eucheuma cottonii and Sargassum sp. on chemical composition, antioxidant activity and sensory properties of purple sweet potato jam. This study used a Completely Randomized Design (CRD) consisting of four treatments using the combination of Sargassum sp., E. cottonii and purple sweet potatoes respectively: 45: 5: 50% (S1), 40: 10: 50% (S2), 35 : 15 : 50 % (S3), 30 : 20 : 50% (S4) and repeat three times. The results of the research obtained showed a real effect on sensory values which included color, aroma, and texture. The test results of the chemical content of jam showed water content between 27.62 %, ash content 1.59 %, crude fiber 1.44 % and carbohydrates 88.96 %. The test results of antioxidant content with percentage inhibitor (IC50) that is 337.81 μg / mL respectively. The results of this study indicate that there is an influence on the content of water content, ash, crude fiber, total carbohydrates and antioxidant content present in the purple sweet potato jam in each treatment.Keywords: Eucheuma cottonii, Ipomoea batatas, chemical composition and antioxidants, Sargassum sp., Jam, Sensory test ABSTRAKPenelitian ini bertujuan untuk mengetahui pengaruh penambahan rumput laut jenis Eucheuma cottonii dan Sargassum sp. terhadap komposisi kimia, aktivitas antioksidan dan sifat sensori selai ubi jalar ungu. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) yang terdiri dari  empat perlakuan kombinasi penggunaan Sargassum sp., E. cottonii dan ubi jalar ungu, yaitu berturut-turut: 45: 5: 50 % (S1), 40: 10: 50 % (S2), 35: 15: 50 % (S3), serta 30: 20: 50 % (S4), ulangan sebanyak tiga kali. Hasil penelitian yang diperoleh menunjukkan pengaruh nyata terhadap nilai sensori yang meliputi warna, aroma dan tekstur. Hasil uji kandungan kimia selai menunjukkan kadar air 27,62 %, kadar abu 1,59%, serat kasar 1,44 % dan karbohidrat 88,96 %. Hasil uji kandungan antioksidan dengan nilai persentase penghambat (IC50) yaitu 337,81 g/mL. Hasil penelitian ini menunjukkan bahwa terdapat pengaruh terhadap kandungan kadar air, abu, serat kasar, karbohidrat total dan kandungan antioksidan yang ada pada selai ubi jalar ungu pada setiap perlakuan.Kata kunci: Eucheuma cottonii, Ipomoea batatas Poir, komposisi kimia dan antioksidan, Sargassum sp., Selai, uji sensori.

scholarly journals PENGARUH PERBANDINGAN TEPUNG BERAS DENGAN PASTA UBI JALAR UNGU (Ipomoea batatas L. Poir) TERHADAP KARAKTERISTIK CENDOL

2019 ◽  
Vol 8 (3) ◽  
pp. 248
Author(s):  
Putri Ayu Wulandari ◽  
I Made Sugitha ◽  
Ni Made Indri Hapsari Arihantana
Keyword(s):  
Antioxidant Activity ◽  
Water Content ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Rice Flour ◽  
Ash Content ◽  
Fiber Content ◽  
Crude Fiber ◽  
Crude Fiber Content ◽  
Purple Sweet Potato

This research was aimed to identify the comparison effect of rice flour and purple sweet potato (Ipomoea batatas L. Poir) paste on the characteristics of cendol and to identify the right ratio of rice flour and purple sweet potato paste to produce cendol with the best characteristics. Completely randomized design was used in this research with treatment ratio of rice flour and purple sweet potato paste which consisted of 6 levels :  50% : 50%, 40% : 60%, 30% : 70%, 20% : 80%, 10% : 90%, and 0% : 100 %. Each treatment was repeated 3 times, resulting in 18 experimental units. The data were then analyzed with analysis of variance and if the treatment had an effect on the variable, the Duncan test was performed. The results showed that rice flour and purple sweet potato paste ratio had significant effect on water content, ash content, crude fiber content, antioxidant activity, anthocyanin, color, texture, flavor, taste, and overall acceptance of cendol. Making purple sweet potato cendol without using rice flour resulted the best characteristic under the following criteria: 89,47%  water content, 0,14% ash content, 1,44% crude fiber content, 93,42 mg/mL antioxidant activity, 1,37 mg/100g  anthocyanin, dark purple and very liked color, texture chewy and liked, flavor typical of purple sweet potato and liked, taste very typical of purple sweet potato and liked, and overall acceptance very liked.   Keyword : cendol, purple sweet potato paste, rice flour

scholarly journals Perbandingan Kadar Glukosa Pada Ubi Jalar Ungu (Ipomoea batatas Var Ayamurasaki) Menggunakan Metode Luff Schoorl

WARTA FARMASI ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 10-19
Author(s):  
Reymon Reymon ◽  
Nur Saadah Daud ◽  
Feny Alvianty
Keyword(s):  
Diabetes Mellitus ◽  
Sweet Potato ◽  
High Glucose ◽  
Ipomoea Batatas ◽  
Degenerative Diseases ◽  
Sweet Potatoes ◽  
Glucose Levels ◽  
Low Carbohydrate ◽  
Purple Sweet Potato ◽  
Different Levels

ABSTRAK Asupan makanan yang mengandung kadar glukosa tinggi perlu diperhatikan untuk mengurangi risiko penyakit degeneratif seperti diabetes mellitus. Hal ini dapat diatasi dengan mengkonsumsi pangan karbohidrat rendah seperti umbi-umbian seperti ubi jalar ungu(Ipomoea batatasVar Ayamurasaki).Penelitian ini bertujuan untuk mengetahui kadar glukosa yang terdapat pada ubi jalar ungu rebus, kukus, bakar dan goreng. Metode yang digunakan adalah eksperimen. Sampel ubi jalar ungu diolah dengan cara direbus, kukus, bakar dan goreng. Sampel yang telah diolah dianalisis kadar glukosanya dengan menggunakan metode Luff Schoorl secara triplo. Berdasarkan hasil penelitian menunjukkan bahwa semua perlakuan mengandung kadar glukosa dengan tingkat yang berbeda pada sampel ubi jalar ungu rebus, kukus, bakar dan goreng berturut-turut yaitu 3,30%, 4,92%, 7,72%, dan 7,36%. Sehingga dapat disimpulkan kadar glukosa terendah diperoleh dari sampel ubi jalar ungu rebus.   Kata kunci : Glukosa, Ubi jalar ungu, Luff Schoorl   ABSTRACT Intake of foods containing high glucose levels needs to be considered to reduce the risk of degenerative diseases such as diabetes mellitus. This can be overcome by consuming low carbohydrate foods such as tubers such as purple sweet potato (Ipomoea batatas Var Ayamurasaki).This study aims to determine the glucose levels found in boiled, steamed, roasted and fried purple sweet potatoes. The method used is an experiment. The sample of purple sweet potato is processed by boiling, steaming, roasting and frying. Samples that have been processed are analyzed for glucose levels using the Luff Schoorl method in triple. Based on research results showed that all treatments contained glucose levels with different levels in the samples of purple sweet potato boiled, steamed, roasted and fried respectively at 3.30%, 4.92%, 7.72%, and 7.36%. So that it can be concluded that the lowest glucose level was obtained from a sample of boiled purple sweet potato.  Keywords: Glucose, purple sweet potato, Luff Schoorl

Fractionation, enzyme inhibitory and cellular antioxidant activity of bioactives from purple sweet potato (Ipomoea batatas)

2017 ◽  
Vol 221 ◽  
pp. 447-456 ◽  
Author(s):  
Tuba Esatbeyoglu ◽  
Miriam Rodríguez-Werner ◽  
Anke Schlösser ◽  
Peter Winterhalter ◽  
Gerald Rimbach
Keyword(s):  
Antioxidant Activity ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Cellular Antioxidant Activity ◽  
Purple Sweet Potato

scholarly journals Investigation of stability of colorant powders extracting from Japanese purple sweet potato (Ipomoea batatas (L.) Poir)

2018 ◽  
Vol 20 (K7) ◽  
pp. 28-34
Author(s):  
Anh Nguyen Quynh Phan ◽  
Nhan Thi Hong Le
Keyword(s):  
Antioxidant Activity ◽  
Low Temperature ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Inhibitory Concentration ◽  
Anthocyanin Content ◽  
Acidic Media ◽  
Anthocyanin Concentration ◽  
Purple Sweet Potato ◽  
The Stability

The stability of colorant powders from Japanese purple sweet potato (Ipomoea batatas (L.) Poir) harvested in Vinh Long province was investigated. The colorants were formed from extracting solutions which were adjusted to pH of 6, 5, 4 and 3 before converted to powder matrix. They had red-purple color and contained anthocyanin concentration of about 32 mg/g. The IC50 inhibitory concentration of the neutral powder was 292.7 μg/mL, whereas the IC50 of pH3 powder was 484 μg/mL, which antioxidant activity decreased by increasing of acidic media clearly. Stability of appearance colors, anthocyanin content, polyanthocyanin index and antioxidant capacity were investigated and they depended on storing conditions (temperature and radiation) and pH media. To avoid denaturation of anthocyanin content, the pigment should be stored in the dark and at low temperature (10 °C). The acidic media could preserve the colorant powder by protecting anthocyanins, but it reduced the biological property of the pigment.

scholarly journals Skrining Golongan Senyawa Kimia dan Pengujian Aktivitas Antioksidan Ekstrak Ubijalar (Ipomoea batatas (L.)Lam.) Varietas Lokal di Distrik Skanto Kabupaten Keerom Provinsi Papua

2020 ◽  
Vol 12 (2) ◽  
pp. 85-92
Author(s):  
Yuliana H. Rumsarwir ◽  
Linus Y. Chrystomo ◽  
Maklon Warpur
Keyword(s):  
Sweet Potato ◽  
Potato Variety ◽  
Ipomoea Batatas ◽  
Agricultural Research ◽  
Food Supplement ◽  
Native Plant ◽  
Phytochemical Screening ◽  
Sweet Potatoes ◽  
Local Varieties ◽  
Purple Sweet Potato

Sweet potato (Ipomoea batatas) is native plant comes from the American continent. It began to spread throughout the world, especially in the tropical countries in the 16th century. Papua Province is one of the regions with the largest area of harvested sweetpotato in Indonesia, therefore there is a high chance to develop food independence in Papua. Because of the Papuan people are accustomed consuming non-rice food. The study was conducted in the Biology Laboratory and the Pharmacy laboratory of MIPA Faculty Cenderawasih University and also the supporting Laboratory of The Papua Agricultural Research and Development Center (Balitbangtan). The purpose of  this research is to test the quality of flour of Keerom sweet potato varieties. Method for flour of sweet potato quality testing were using phytochemical screening  to determine the chemical compound group and using antioxidant test with the DPPH (1-diphenyl-2-picrylhydrazyl) method.  The results of the description of the Skanto District Keerom sweet potatoes in the field  were three (3) local varieties including Weayuken (purple sweet potato), Musanaken (yellow sweet potato) and Hiho (white sweet potato). The result of phytochemical  screening show that the purple sweet potato variety has more chemical compounds consist of tannins, quinones, flavonoids, terpenoids and alkaloids compared to white sweet potato consist of alkaloids only and yellow sweet potato consist of tannins, flavonoids, terpenoids and alkaloids. The result of antioxidant activity tests to flour extract ethanol  has IC50values of 299.82 ppm (purple sweet potato), 301.18 (yellow sweet potato), 1027.98 ppm (white sweet potato) respectively. So can be conclude that the purple sweet potato variety is the best. It was suggested for further research to isolate bioactive compounds and test antioxidants to other varieties in other centers areas of sweetpotato culture which have potential to develop for food, supplement and tradisional drugs.Key words: Sweet potato; local varieties; flour quality; phytochemical screening; antioxidant test

scholarly journals Screening of Phytochemical, Antioxidant and Fiber Levels of Sweet Potato (Ipomoea batatas), Cassava (Manihot esculenta), and Binahong (Anredera cordifolia (Ten) Steenis) Leaves Extract

2020 ◽  
Vol 11 (3) ◽  
pp. 4779-4783
Author(s):  
Nurdin Rahman ◽  
Fendi Pradana ◽  
St. Ika Fitrasyah ◽  
Diah Ayu Hartini ◽  
Ariani ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Free Radicals ◽  
Sweet Potato ◽  
Experimental Research ◽  
Manihot Esculenta ◽  
Ipomoea Batatas ◽  
Sweet Potatoes ◽  
Cassava Leaves ◽  
Average Fibre ◽  
Sweet Potato Leaves

Generally, vegetables contain various vitamins, minerals, and pigments that have antioxidant activity and can neutralise free radicals before causing damage to body cells. The research aimed to analyse phytochemical, antioxidant contents, and fibre levels of leaves extract of sweet potato, cassava, and binahong. The study was experimental research utilising leaves of sweet potato, cassava, and binahong. The leaves were removed and analysed for contents of phytochemicals, antioxidant and fibre levels. Flavonoid compounds were obtained positively on the 5-blades leaves extract of Cassavas. Polyphenol and tannin were undoubtedly discovered on the single, and 3-blades leaves extract of Sweet Potatoes and also on the five, and 7-blades leaves extract of Cassavas. Interestingly, alkaloids and steroids were identified on leaves extract of binahong, the single and 3-blades leaves extract of Sweet Potatoes and also on the five and 7-blades leaves extract of Cassavas. Consequently, 7-blades leaves extract of Cassavas contains the highest level of antioxidants (IC50), which was 44.46% (90 ppm). Nonetheless, 3-blades leaves extract of Sweet Potatoes contains the lowest. The leaves extract of binahong had an average fibre content of 28.45%, followed by 5-blades cassava leaves at 26.59%, and cassava leaves at 25%. The extract of sweet potato leaves was able to be developed as a source of antioxidants. Moreover, it contained high fibres.

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