Determination of Total Beta-Carotene in Sweet Potatoes and Sweet Potato Products. An Improved Method

1946 ◽  
Vol 18 (9) ◽  
pp. 557-562 ◽  
Author(s):  
R.T. O'Connor ◽  
D.C. Heinzelman ◽  
M.E. Jefferson
Keyword(s):  
Sweet Potato ◽  
Beta Carotene ◽  
Improved Method ◽  
Sweet Potatoes ◽  
Potato Products ◽  
Total Beta

Production and Characterization of Exopolysaccharides from Loss Cooked Sweet Potatoes (Ipomoea batatas) by Lactobacillus Plantarum

2021 ◽  
Vol 2 (7) ◽  
pp. 01-11
Author(s):  
Robert Germain Beka ◽  
Emmanuel Akdowa Panyoo ◽  
Germaine Yadang ◽  
Pamela Homsi ◽  
Laurette Blandine Mezajoug Kenfack ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Chemical Characterization ◽  
Sweet Potatoes ◽  
Fermentation Time ◽  
Total Sugars ◽  
Titrable Acidity ◽  
Lactic Acid Content

The aim of the work was to produce and characterize the exopolysaccharides from loss cooked sweet potato (Ipomoea batatas) using fermentation with Lactobacillus. The cooked sweet potato was fermented according to the factorial design with the following factors: the time (21.51h-38.48h) and the amount of Lactobacillus (1.58*106-5*106UFC). Responses were represented by production yield, pH, and titrable acidity. Characterization of the exopolysaccharides was then done by determination of total sugars, solubility index and viscosity. The results show that the pH of unfermented cooked potatoes was between 6.23 to 6.63. The pH of fermented potatoes varies from 3.96 to 4.06. The lactic acid content was found from 7.75 to 9.9% for the fermented samples. The production yields are 1.90% for the samples fermented for 21.5 hours with 3.5*106UFC of bacteria and 5.62% for those fermented for 30 hours with the same volume of inoculum. The average viscosity of the products was 4mPas regardless of the fermentation time. Chemical characterization indicates glucose contents of 68.21 and 94.01% in fermented potato for 24h and 21h respectively. The solubility index gives values of 70.3 ± 0.16 and 88.11 ± 0.23 for fermentation times of 21h and 24h respectively. Results of this work indicated that cooked sweet potatoes ferment for 21h was a promising substrate for production of exopolysaccharides.

scholarly journals Addition of lipids to cookies containing orange-fleshed sweet potatoes increases carotenoid retention

2020 ◽  
Vol 9 (12) ◽  
pp. e8191210964
Author(s):  
Laysa Borges Tomas de Sousa ◽  
Mariana Guadagnini Lisboa Soares ◽  
Adriana Paula da Silva Minguita ◽  
José Luiz Viana de Carvalho ◽  
Érica Aguiar Moraes ◽  
...  
Keyword(s):  
Sweet Potato ◽  
High Performance ◽  
Vitamin A Deficiency ◽  
Beta Carotene ◽  
Sweet Potatoes ◽  
Total Carotenoids ◽  
The One ◽  
Processing And Storage ◽  
And Storage ◽  
Excellent Source

Sweet potato is one of the seven major staple crops in the world. Although most cream-fleshed sweet potatoes are produced locally, orange-fleshed sweet potato (OFSP) is an excellent source of beta-carotene and can be promoted to alleviate vitamin A deficiency. The aim of this study was to evaluate the retention of total carotenoids (TC) and all-trans-beta-carotene (ATBC) after processing and storage of cookies with different proportions of OFSP and margarine. Cookies formulated with 18 to 22.23 g/100 g of OFSP and 28.57 to 34.6 g/100 g of margarine were analyzed by spectrophotometry and high-performance liquid chromatography. The formulation containing the highest content of OFSP (22.23 g/100 g) and 32.84 g/100 g of margarine showed greater retention of TC and ATBC after processing. Among the other samples with the same proportion of OFSP, the one containing the highest margarine concentration (34.6 g/100 g) has shown a greater capacity to maintain TC and ATBC during storage (up to 56 days), demonstrating lipids important role in the preservation of these components.

scholarly journals Integrated Efforts for the Valorization of Sweet Potato By-Products within a Circular Economy Concept: Biocomposites for Packaging Applications Close the Loop

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1048
Author(s):  
Micaela Vannini ◽  
Paola Marchese ◽  
Laura Sisti ◽  
Andrea Saccani ◽  
Taihua Mu ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Circular Economy ◽  
Food Packaging ◽  
Previous Treatment ◽  
Sweet Potatoes ◽  
Melt Mixing ◽  
Hydrogen Bond Interactions ◽  
Potato Waste ◽  
Potato Products ◽  
By Products

With the aim to fully exploit the by-products obtained after the industrial extraction of starch from sweet potatoes, a cascading approach was developed to extract high-value molecules, such as proteins and pectins, and to valorize the solid fraction, rich in starch and fibrous components. This fraction was used to prepare new biocomposites designed for food packaging applications. The sweet potato residue was added to poly(3-hydroxybutyrate-co-3-hydroxyvalerate) in various amounts up to 40 wt % by melt mixing, without any previous treatment. The composites are semicrystalline materials, characterized by thermal stability up to 260 °C. For the composites containing up to 10 wt % of residue, the tensile strength remains over 30 MPa and the strain stays over 3.2%. A homogeneous dispersion of the sweet potato waste into the bio-polymeric matrix was achieved but, despite the presence of hydrogen bond interactions between the components, a poor interfacial adhesion was detected. Considering the significant percentage of sweet potato waste used, the biocomposites obtained show a low economic and environmental impact, resulting in an interesting bio-alternative to the materials commonly used in the packaging industry. Thus, according to the principles of a circular economy, the preparation of the biocomposites closes the loop of the complete valorization of sweet potato products and by-products.

scholarly journals Impact of Processing on Retention of Beta Carotene of Sweet Potatoes

2020 ◽  
Vol 12 (12) ◽  
pp. 20-24
Author(s):  
Ujjal Rayamajhi ◽  
Achyut Mishra
Keyword(s):  
Sweet Potato ◽  
Proximate Composition ◽  
Beta Carotene ◽  
Sweet Potatoes ◽  
Carotene Content ◽  
Processing Methods ◽  
Nutrient Profile ◽  
Boiling Process ◽  
The Impact ◽  
Orange Fleshed Sweet Potatoes

The study was carried out to evaluate the impact of processing on retention of beta-carotene of sweet potatoes. Eight cultivars of sweet potatoes were used in the study; among which four cultivars were of orange-fleshed varieties viz. ‘CIP 440012’, ‘CIP 440015’, ‘CIP 440267’ & ‘CIP 440021’, and four cultivars were of white fleshed varieties viz. Lamatar White, Balewa Red, Sangachowk Red and Barbote White. The proximate composition and micronutrient composition of eight cultivars of raw sweet potatoes were determined. The carotene content of sweet potato cultivars was also calculated. Finally, the retention of carotene content in sweet potato cultivates under various processing methods (viz. boiling for 30 minutes at 100°C, baking in a microwave oven at 200°C for 30 minutes and drying in a cabinet dryer for 12 hours at 60°C) was observed. The orange fleshed varieties (CIP cultivars) had the greater proximate composition than the white fleshed varieties (local cultivars). The micronutrient composition of orange fleshed sweet potatoes and white fleshed varieties were similar. But the carotene content of the orange fleshed varieties was greater; ranging from 14.43-22.11 mg/100gm. The white fleshed varieties had a low carotene concentration of 0.70-1.83 mg/100gm. The retention of carotene content was observed higher in the boiling process (79%-89%) followed by baking (56%-78%) and least in drying (44%-67%). Also, the orange fleshed varieties had a better retention capability than white fleshed varieties in all the processing methods. Thus, orange fleshed sweet potatoes had a better nutrient profile with higher retention capabilities.

scholarly journals Introduksi Produk Olahan Ubi Jalar Pada Anggota Ika Tanjung Sakti, Bandar Lampung

2020 ◽  
Vol 4 (2) ◽  
pp. 263-267
Author(s):  
Neti Yuliana ◽  
Dewi Sartika ◽  
Samsu Udayana Nudin ◽  
Novita Herdiana ◽  
Pramita Sari Anungputri
Keyword(s):  
Sweet Potato ◽  
Sweet Potatoes ◽  
Group Members ◽  
Target Community ◽  
Processed Products ◽  
Nutritional Benefits ◽  
Potato Products

Sweet potato is a non-rice carbohydrate food that has health and nutritional benefits, so it needs to be disseminated in the community. This community extention program aimed to increase the understanding of the target community regarding the diversification of sweet potatao processing into various rice substitution products, as well as providing knowledge of the benefits of sweet potato from the nutritional and health aspects. The participant audiences was the Tanjung Sakti IKA group members, Sukarame, Bandar Lampung. The method used was lecture, discussion, and evaluation. The results of the activity showed that the change percentage in participants' knowledge about the benefits of sweet potatoes increased by 85%, and that about the processed sweet potato products by 67-100% depending on the type of product. In general, participants consider counseling or introduction of sweet potatoes was useful.   Keywords: Tanjung Sakti IKA, health and nutritional benefits, processed products, sweet potatoes

scholarly journals Assessing the Productivity, Quality and Profitability of Orange Fleshed Sweet Potatoes Grown in Riverbank of the Tista Floodplain Agro-Ecological Zone of Bangladesh

Agronomy ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2046
Author(s):  
Abdullah-Al Mahmud ◽  
Md Jahangir Alam ◽  
Simon Heck ◽  
Wolfgang J. Grüneberg ◽  
Debashish Chanda ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Beta Carotene ◽  
Energy Output ◽  
Root Weight ◽  
Ecological Zone ◽  
Root Yield ◽  
Sweet Potatoes ◽  
River Bank ◽  
Local Cultivar ◽  
Orange Fleshed Sweet Potatoes

Orange fleshed sweet potatoes (OFSP) are desirable for high productivity and profitability and their distribution to improve the nutrition of river bank inhabitants of Gaibandha and Rangpur districts of Bangladesh. In this context, a field trial was conducted in two riverbank-based farmers’ fields such as Saghata, Gaibandha, and Pirganj, Rangpur, particularly in the Active Tista Floodplain Agro-ecological Zone of Bangladesh. Four OFSP varieties were evaluated, i.e., G1: BARI SP-8; G2: BARI SP-12; G3: BARI SP-14; G4: BARI SP-15, along with one local cultivar as a control (Red skin with white flesh). Significant variations among the sweet potato genotypes were noted for a number of tuberous roots plant−1, length of root diameter of roots, tuberous root weight plant−1, root yield (fresh), root yield (dry), beta-carotene yield, as well as energy output. Over the locations, BARI SP-12 produced about 73% higher root yield (32.00 t ha−1) and it was like the BARI SP-8 (31.07 t ha−1), which produced about 68% higher yield in comparison with local cultivar (18.51 t ha−1). Across the location, BARI SP-8 performed better in root yield (31.89 t ha−1) in Gaibandha, 69% superior to local cultivar, whereas BARI SP-12 performed better in Rangpur (33.66 t ha−1), which was 86% greater than the local sweet potato cultivar. Considering the root dry yield production, BARI SP-8 produced the highest in the Gaibandha location after that Rangpur location. Further, BARI SP-14 had wider adaptability and stability over the year and location depended on the AMMI model. The beta carotene yield (Vitamin-A precursor) ranged 336–2957 kg ha−1 among the OFSP varieties, whereas the highest (2957 kg ha−1) carotene was recorded in BARI SP-14, similar to BARI SP-15 (2952 kg ha−1) but was much lower in BARI SP-8 and BARI SP-12. Moreover, BARI SP-8 and BARI SP-12 were also economically profitable in terms of gross margin (3233 and 3364 US$ ha−1, respectively), net return (3039 and 3170 US$ ha−1, respectively) and BCR (3.21 and 3.31, respectively, vs. 1.91) due to higher returns with a similar production cost of the local cultivar. The results suggested that BARI SP-8 is economically profitable in the riverbank areas of Gaibandha, and BARI SP-12 is suitable for the riverbank areas of Rangpur.

scholarly journals Sweet Potato Leaves Contain Beta Carotene and Lutein for Eye Health

2021 ◽  
Vol 2 (2) ◽  
pp. 82-89
Author(s):  
Kepaito Mandela ◽  
Evaire Shakave
Keyword(s):  
Sweet Potato ◽  
Treatment Options ◽  
Beta Carotene ◽  
Refractive Errors ◽  
Sweet Potatoes ◽  
Blurred Vision ◽  
Dry Eyes ◽  
Eye Health ◽  
Lutein Content ◽  
Sweet Potato Leaves

This article discusses the benefits of sweet potato leaves containing beta carotene and lutein for eye health. There are some problems of eyes namely Conjunctivitis, Dry Eyes , Cataract, Glaucoma and Refractive errors (blurred vision). Treatment options include surgery, including laser and traditional eye surgery. Sweet potatoes are high in beta-carotene and anthocyanins, which are powerful antioxidants that can help prevent eyesight loss and support eye health. Beta carotene (provitamin A) and vitamin C are plentiful in yellow sweet potato. The beta carotene and lutein content is beneficial for eye health.

scholarly journals Interference of Weeds in Sweet Potato Genotype Growth (Ipomoea batatas (L.) Lam.)

2018 ◽  
pp. 1-11
Author(s):  
J. T. Cavalcante ◽  
P. V. Ferreira ◽  
J. L. X. L. Cunha ◽  
L. L. M. Nobre ◽  
M. T. da Silva ◽  
...  
Keyword(s):  
Leaf Area ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Dry Mass ◽  
Sweet Potatoes ◽  
Evaluation Stage ◽  
Potato Genotype ◽  
Forced Air ◽  
Air Circulation

The experiment was carried out in the Experimental Area of ​​the Plant Genetic Improvement Sector of the Agricultural Sciences Center of the Federal University of Alagoas (SMGP-CECA-UFAL), in the year 2013, where periods of control and weed coexistence of sweet potatoes were evaluated. The experimental design was carried out in randomized blocks in the 3 x 14 factorial scheme with three replications, with three sweet potato genotypes in 14 periods of interference, and distributed in seven control periods (0, 10, 20, 30, 40, 50 and 60 days after planting - DAP), from which the weeds were controlled, and seven coexistence periods, from which the weeds coexisted with the crop. The evaluations consisted of sweet potato genotype shoot samplings at 30, 60, 90, and 120 days after planting (DAP), using one working area plant per plot in each evaluation stage. In the determination of the leaf area, a mechanical integrator was used, and to obtain the shoot dry mass, the material was taken to a forced air circulation oven at 65 ºC for 72 h, with subsequent weighing. According to the results, it can be observed that, in the coexisting treatments, there was a significant reduction in the shoot growth rates, in comparison to the treatments in which the weeds were controlled, especially the reduction of the leaf area at 120 DAP, where clone 6 and Sergipana showed a reduction of 89.0% and 88.0%, respectively. As for Clone 14, this reduction occurred at 90 DAP, at about 52.0%, which was less expressive, whereas in relation to the shoot dry mass, clones 6, 14, and the Sergipana variety showed a reduction at 120 DAP of 86%, 51%, and 46%, respectively.

Sign in / Sign up

Export Citation Format

Share Document