scholarly journals Obtaining and characterization of freeze-dried whole taro root (Colocasia esculenta), mucilage and residue as functional food

2018 ◽  
Vol 17 (1) ◽  
pp. 9 ◽  
Author(s):  
Juliana De Brito Maia Miamoto ◽  
Joelma Pereira ◽  
Suzan Kelly Vilela Bertolucci
Keyword(s):  
Vitamin C ◽  
Functional Food ◽  
Starch Content ◽  
Colocasia Esculenta ◽  
Carotene Content ◽  
Phytochemical Content ◽  
Industrial Processing ◽  
Popular Medicine ◽  
Freeze Dried ◽  
Β Carotene

TTaro root (Colocasia esculenta L.), a starch based plant widely grown for direct consumption, has been produced for more than 2000 years in regions with a tropical climate. In Brazil, it is a crop grown by small producers, using it for direct consumption. Some industries use the tubers for preparation of baby food; however, there is no industrial processing of taro root. It contains high caloric and protein value and has elements such as phosphorus and potassium and B-complex vitamins; moreover, in popular medicine, it has recognized medicinal properties of detoxification, purification, anti-beriberi properties, etc. The purpose of this study was to determine, characterize and obtain whole taro root flour and its subproducts (mucilage and residue from mucilage extraction) by means of physical-chemical analyses, with a view toward discovering its potential qualities as a functional food. The freeze-dried flours of taro root had considerable proximate composition with lipid values below wheat flour. Starch appeared in the three types of taro root flour at significant levels. The nutritional fiber content was on average 50% greater than the daily requirements of an individual. The minerals Zn, Fe and Mn appeared at levels able to meet significant percentages of the daily needs of children, as well as the vitamin C and β-carotene content. Phytochemical compounds, saponins, anthocyanins and polyphenols were present in all the flours. As a result, we concluded that these taro root flours constitute a viable alternative to production of bakery products based on their starch content. Whole taro root flours and their subproducts may be considered as having potential for functional foods due to their vitamin, mineral, protein and phytochemical content, in addition to their expressive quantity of fiber.Key-words: chemical composition of foods, taro root flour, nutritional fiber, vitamin C, β-carotene, phytochemicals.

scholarly journals Climate Change Enhanced Carotenoid Pro-Vitamin A Levels of Selected Plantain Cultivars

Plants ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 541 ◽  
Author(s):  
Beloved Mensah Dzomeku ◽  
Julian P. Wald ◽  
Jens Norbert Wünsche ◽  
Donatus Nohr ◽  
Hans K. Biesalski
Keyword(s):  
Low Cost ◽  
Dry Season ◽  
Provitamin A ◽  
Poor People ◽  
Carotene Content ◽  
Uv Index ◽  
Provitamin A Carotenoids ◽  
Micronutrient Intake ◽  
Freeze Dried ◽  
Β Carotene

Diet diversification and the exploitation of traditional, micronutrient-rich germplasm of staple crops are generally regarded as sustainable and low-cost approaches to increase the micronutrient intake of resource-poor people. Sun’s UV index was collected daily throughout the year. The study assessed the seasonality of provitamin A carotenoids in three plantain cultivars in response to climatic condition. Fruits were harvested at three maturities and freeze-dried before analysis. The results showed that there were high levels of the sun’s UV-B radiations throughout the year with the highest occurring from November to May when the area experienced clear skies with minimal cloud cover. These high levels of the sun’s UV-B index occurred between 9.00 h GMT and 17.00 h GMT. The study also showed that α-carotene content increased with maturity in “Apantu” during the rainy seasons ranging from 95 to 172 μg/100 g of dry pulp. Similar trends were observed during the dry season with a range of 28 to 489 μg/100 g. The α-carotene contents were very high in the periods of high sun’s UV-B radiations compared to the periods of low sun’s UV-B radiations. The α-carotene levels in the giant French plantains showed similar trends. Intermediate French “Oniaba” and False Horn “Apantu” plantain cultivar showed the highest content of β-carotene during the dry season. The high provitamin A carotenoid levels in the cultivars coincided with the high levels of the sun’s UV index.

scholarly journals Influence of feeding different vegetables on plasma levels of carotenoids, folate and vitamin C. Effect of disruption of the vegetable matrix

1999 ◽  
Vol 82 (3) ◽  
pp. 203-212 ◽  
Author(s):  
Karin H. van het Hof ◽  
Lilian B. M. Tijburg ◽  
K. Pietrzik ◽  
Jan A. Weststrate
Keyword(s):  
Vitamin C ◽  
Plasma Levels ◽  
Vegetable Intake ◽  
Block Design ◽  
Plasma Concentrations ◽  
Carotene Content ◽  
Beneficial Effects ◽  
Incomplete Block Design ◽  
Β Carotene ◽  
Green Peas

Carotenoids, folate and vitamin C may contribute to the observed beneficial effects of increased vegetable intake. Currently, knowledge on the bioavailability of these compounds from vegetables is limited. We compared the efficacy of different vegetables, at the same level of intake (i.e. 300 g/d), in increasing plasma levels of carotenoids, folate and vitamin C and we investigated if disruption of the vegetable matrix would enhance the bioavailability of these micronutrients. In an incomplete block design, sixty-nine volunteers consumed a control meal without vegetables and three out of four vegetable meals (i.e. broccoli, green peas, whole leaf spinach, chopped spinach; containing between 1·7 and 24·6 mg β-carotene, 3·8 and 26 mg lutein, 0·22 and 0·60 mg folate and 26 and 93 mg vitamin C) or a meal supplemented with synthetic β-carotene (33·3 mg). Meals were consumed for 4 d and fasting blood samples were taken at the end of each period. Consumption of the spinach-supplemented meal did not affect plasma levels of β-carotene, although the β-carotene content was 10-fold those of broccoli and green peas, which induced significant increases in plasma β-carotene levels (28 (95 % CI 6·4, 55) % and 26 (95 % CI 2·6, 54) % respectively). The β-carotene-supplemented meal increased plasma concentrations of β-carotene effectively (517 (95 % CI 409, 648) %). All vegetable meals increased the plasma concentrations of lutein and vitamin C significantly. Broccoli and green peas were, when expressed per mg carotenoid consumed, also more effective sources of lutein than spinach. A significant increase in plasma folate concentration was found only after consumption of the spinach-supplemented meal, which provided the highest level of folate. Disruption of the spinach matrix increased the plasma responses to both lutein (14 (95 % CI 3·7, 25) %) and folate (10 (95 % CI 2·2, 18) %), whereas it did not affect the response to β-carotene. We conclude that the bioavailabilities of β-carotene and lutein vary substantially among different vegetables and that the bioavailabilities of lutein and folate from spinach can be improved by disruption of the vegetable matrix.

scholarly journals The Effect of Differentiated Nutrition on the Content of Antioxidants in Broccoli

2014 ◽  
Vol 62 (3) ◽  
pp. 561-564
Author(s):  
Anton Uher ◽  
Miroslav Šlosár ◽  
Tomáš Lošák ◽  
Jaroslav Hlušek
Keyword(s):  
Vitamin C ◽  
Nitrogen Nutrition ◽  
Experimental Period ◽  
Vegetation Period ◽  
Fresh Mass ◽  
Antioxidant Compounds ◽  
Average Content ◽  
Carotene Content ◽  
The Impact ◽  
Β Carotene

The aim of this work is to determine the impact of differentiated nutrition, using different rates of nitrogen and sulphur, on the level of antioxidants, particularly vitamin E1 (α-tocopherol), vitamin C and β-carotene in the broccoli rosette. The experimental broccoli variety was Tiburon F1. It is a strong medium-late variety with a vegetation period of 82 days. In the 3-year field trial we observed the effects of different rates of nitrogen and sulphur on the amount of antioxidant compounds in broccoli. The experiment consisted of four fertilisation treatments: 1) unfertilised control, 2) fertilised with 200 kg N.ha−1, 3) also fertilized with 200 kg N.ha−1 and supplemented with 50 kg S.ha−1, 4) 200 kg.ha−1 and 60 kg S.ha−1 was applied. To determine the amount of β-carotene and vitamin E1, the slightly modified method of Olives Barb et al. (2006) was used. The vitamin C content was determined by titration. Nitrogen nutrition has a significant impact not only on the amount of harvested broccoli, but also on the content of β-carotene, vitamin C and vitamin E1. The average content of β-carotene for the entire experimental period ranged from 24.84 mg.kg−1 to 30.13 mg.kg−1 of fresh mass. The content of β-carotene in broccoli rosettes increased as per the following order of treatments: control > N:S (200:50 kg.ha−1) > N:S (200:60 kg.ha−1) > N (kg.ha−1). The β-carotene content increased significantly only in treatment 2 (30.13 mg.kg−1) as compared to all the other treatments. The level of vitamin C revealed the significant effect of fertilisation in all the treatments (567.9–614.2 mg.kg−1) in contrast to the control variant (528.4 mg.kg−1). What is more, in treatment 4 the content of vitamin C increased significantly in contrast to fertilised treatments 2 and 3. The average content of vitamin E1 ranged from 4.33 mg.kg−1 to 4.88 mg.kg−1 of fresh mass. There were no significant differences among the untreated control and fertilised treatments 2 and 3. The only significant decrease in the content of vitamin E1 was detected in treatment 4 as against the unfertilised treatment 1.

Effects of processing and packaging on vitamin C and β-carotene content of ready-to-use (RTU) vegetables

2000 ◽  
Vol 33 (2) ◽  
pp. 131-136 ◽  
Author(s):  
A Hussein ◽  
J.A Odumeru ◽  
T Ayanbadejo ◽  
H Faulkner ◽  
W.B McNab ◽  
...  
Keyword(s):  
Vitamin C ◽  
Carotene Content ◽  
Β Carotene

scholarly journals The Impact of Freeze-Drying Conditions on the Physico-Chemical Properties and Bioactive Compounds of a Freeze-Dried Orange Puree

Foods ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 32 ◽  
Author(s):  
Marilú A. Silva-Espinoza ◽  
Charfedinne Ayed ◽  
Timothy Foster ◽  
María del Mar Camacho ◽  
Nuria Martínez-Navarrete
Keyword(s):  
Vitamin C ◽  
Water Content ◽  
Freeze Drying ◽  
Low Pressure ◽  
High Water Content ◽  
Freeze Dried ◽  
Drying Conditions ◽  
The Impact ◽  
Shelf Temperature ◽  
Β Carotene

Fruits are essential for a healthy diet, as they contribute to the prevention of cardiovascular diseases and some cancers, which is attributed to their high bioactive compound content contributing to their antioxidant capacity. Nevertheless, fruits have a short shelf life due to their high-water content, and freeze-drying is a well-known technique to preserve their nutritive quality. However, it is an expensive technology, both due to the use of low pressure and long processing time. Therefore, an optimisation of variables such as the freezing rate, working pressure and shelf temperature during freeze-drying may preserve fruit quality while reducing the time and costs. The impact of these variables on colour, porosity, mechanical properties, water content, vitamin C, total phenols, β-carotene, and antioxidant activity of a freeze-dried orange puree was evaluated. The results showed a great impact of pressure and shelf temperature on luminosity, chroma and water content. Vitamin C and β-carotene were more preserved with higher shelf temperatures (shorter times of processing) and lower pressure, respectively. The optimum freeze-drying conditions preserving the nutrients, and with an interesting structural property, perceived as a crunchy product by consumers, are low pressure (5 Pa) and high shelf temperature (50 °C).

Influence of Drying by Convective Air Dryer or Power Ultrasound on the Vitamin C and β-Carotene Content of Carrots

2010 ◽  
Vol 58 (19) ◽  
pp. 10539-10544 ◽  
Author(s):  
Juana Frias ◽  
Elena Peñas ◽  
Mónica Ullate ◽  
Concepción Vidal-Valverde
Keyword(s):  
Vitamin C ◽  
Carotene Content ◽  
Power Ultrasound ◽  
Air Dryer ◽  
Β Carotene

scholarly journals Effect of Tamarillo Fortification and Fermentation Process on Physicochemical Properties and Nutrient and Volatiles Content of Yoghurt

Foods ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 79
Author(s):  
Tung Thanh Diep ◽  
Michelle Ji Yeon Yoo ◽  
Elaine Rush
Keyword(s):  
Elastic Modulus ◽  
Vitamin C ◽  
Physicochemical Properties ◽  
Fermentation Process ◽  
Food Composition ◽  
Good Source ◽  
Yellow Colour ◽  
Freeze Dried ◽  
Food Composition Data ◽  
Β Carotene

Bright-red Laird’s Large tamarillo is a unique and under-utilised fruit that is a dietary source of carotenoids, vitamins C and E, and dietary fibre. The effects of the addition of freeze-dried tamarillo powder (5–15%) to milk and yoghurt starter either before (PRE) or after (POS) fermentation on physicochemical properties were examined. Using LC-MS and GG-MS, nutrient and volatile contents of tamarillo yoghurt were also examined. The addition of tamarillo prior to fermentation was associated with a more yellow colour and higher concentrations of tocopherol compared to when tamarillo was added after fermentation. Higher elastic modulus, PUFAs, pro-vitamin A content, and vitamin C retention were observed for POS than PRE. All tamarillo yoghurts showed improvement in syneresis, lower lactose content, and higher concentrations of antioxidant vitamins than the commercial premium-assorted fruits yoghurt from New Zealand Food Composition Data. Yoghurt fortified with tamarillo powder offers the potential for the development of a high-value nutritional product that could be a good source of vitamin C and a source of vitamin E and β-carotene, and maintain the volatiles that give tamarillo its distinctive flavour.

scholarly journals Impact of Three Different Dehydration Methods on Nutritional Values and Sensory Quality of Dried Broccoli, Oranges, and Carrots

Foods ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1464
Author(s):  
Xanyar Mohammadi ◽  
Yuhao Deng ◽  
Golshan Matinfar ◽  
Anika Singh ◽  
Ronit Mandal ◽  
...  
Keyword(s):  
Shelf Life ◽  
Radiant Energy ◽  
Carotene Content ◽  
Nutritional Values ◽  
Life Study ◽  
Testing Method ◽  
Freeze Dried ◽  
Before And After ◽  
Β Carotene

Radiant Energy Vacuum (REV)-dried broccoli, oranges, and carrots prepared by the optimal drying protocols determined in this study were compared to the freeze-dried and air-dried samples based on the nutritional values before and after drying. An accelerated shelf-life study for REV-dried broccoli, oranges, and carrots was also conducted. For all the samples, REV drying significantly shortened the processing time. The REV-dried samples had much higher retention of the nutritional values (vitamin C, β-carotene) compared to the conventional air-drying process, and the values were also competitive to those of the freeze-dried samples. Although freeze-drying resulted in the best rehydration property, the REV-dried samples still earned the highest scores in the sensory test. In the accelerated shelf-life study conducted on the REV-dried samples, the moisture content and water activity stayed at the same level, but the nutritional values showed a downward trend. The sensory properties fluctuated in the shelf-life but still gained positive feedback from the panelists. Moreover, the testing method for β-carotene content was uniquely designed in this project and could be a semi-quantitative method to refer to.

scholarly journals Biochemical characterization of fruits of Lycium spp. in Ukraine

2021 ◽  
Vol 12 (1) ◽  
pp. 71-77
Author(s):  
M. Zhurba ◽  
O. Vergun ◽  
S. Klymenko ◽  
I. Szot
Keyword(s):  
Vitamin C ◽  
Dry Matter ◽  
Biochemical Characterization ◽  
Sugar Content ◽  
Botanical Garden ◽  
Dry Matter Content ◽  
Carotene Content ◽  
Yellow Colour ◽  
Β Carotene

Fruits of Lycium possess therapeutic properties due to which they are used in traditional and folk medicine and can be used as a kind of functional food. The objective of this study was to evaluate the biochemical characterization of Lycium L. (L. barbarum L., L. chinense Mill. and L. truncatum Y. C. Wang) fruits for 16 cultivars and varieties from the collections in the M. M. Gryshko National Botanical Garden of NAS of Ukraine (Kyiv). This study was aimed at determining the concentration of nutrients in the Lycium fruits. Individual genotypes of three Lycium species: L. barbarum, L.chinense, and L. truncatum, differed in such features as the content of dry matter, sugars, vitamin C, β-carotene, acidity, and tannins in the fruit. Fruits of Lycium spp. are a valuable source of nutrients such as vitamin C (4.38–121.0 mg 100g–1 FW), β-carotene content (1.45–5.52%), and tannin (0.12–1.34%). The sugar content (13.83–20.87%) and acidity of the fruit (0.23–4.62%) meet the consumers' requirements for fresh fruit. The cultivar Amber Sweet (L. chinense) had fruits of which the similarities between biochemical characteristics of different studies genotypes were the lowest. The cv. Amber Sweet was characterized by fruit with high sugar content, very high vitamin C content, average acid content, low tannins and β-carotene content, and the lowest dry matter content. Furthermore, a distinctive feature of the other tested genotypes was the yellow colour of the fruit. The data obtained can be used for further selective work.

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