scholarly journals EFFECT OF PROCESSING ON BETA CAROTENE, ASCORBIC ACID AND CHLOROPHYLL RETENTION OF SPINACH AND MINT

2019 ◽  
pp. 20-28
Keyword(s):  
Ascorbic Acid ◽  
Beta Carotene ◽  
Chlorophyll Retention

scholarly journals Antigoitrogenic effect of combined supplementation with dl-alpha-tocopherol, ascorbic acid and beta-carotene and of dl-alpha-tocopherol alone in the rat

1998 ◽  
Vol 156 (3) ◽  
pp. 551-561 ◽  
Author(s):  
JF Mutaku ◽  
MC Many ◽  
I Colin ◽  
JF Denef ◽  
MF van den Hove
Keyword(s):  
Endothelial Cells ◽  
Ascorbic Acid ◽  
Vitamin E ◽  
Beta Carotene ◽  
Iodine Content ◽  
Fold Increase ◽  
Alpha Tocopherol ◽  
Free Radical Scavengers ◽  
Rate Of Increase ◽  
Male Wistar Rats

The effects of the vitamins dl-alpha-tocopherol, ascorbic acid and beta-carotene, free radical scavengers and lipid peroxidation inhibitors, were analyzed in male Wistar rats made goitrous by feeding a low iodine diet (< 20 micrograms iodine/kg) and perchlorate (1% in drinking water) for 4, 8, 16, and 32 days. Groups of control or goitrous rats received for at least 16 days before killing a diet containing 0.6% vitamin E (as dl-alpha-tocopherol acetate), 1.2% vitamin C (ascorbic acid) and 0.48% beta-carotene, either simultaneously (vitamin cocktail) or separately. This treatment led to a 5-fold increase of vitamin E in the thyroid gland, a 24-fold increase in the liver and a 3-fold increase in the plasma. In control rats, vitamin cocktail administration increased slightly the thyroid weight with little changes in thyroid function parameters. During iodine deficiency, administration of the vitamin cocktail or vitamin E alone reduced significantly the rate of increase in thyroid weight, and DNA and protein contents, as well as the proportion of [3H]thymidine labeled thyroid follicular cells, but not that of labeled endothelial cells. Plasma tri-iodothyronine, thyroxine, TSH levels, thyroid iodine content and concentration as well as relative volumes of glandular compartments were not modified. The proportion of necrotic cells rose from 0.5% in normal animals to about 2% after 16 days of goiter development. No significant protective effect of the vitamins was observed. These results suggest that these vitamins, particularly vitamin E, modulate one of the regulatory cascades involved in the control of thyroid follicular cell growth, without interfering with the proliferation of endothelial cells.

Preeclampsia and antioxidant nutrients: Decreased plasma levels of reduced ascorbic acid, α-tocopherol, and beta-carotene in women with preeclampsia

1994 ◽  
Vol 171 (1) ◽  
pp. 150-157 ◽  
Author(s):  
Magdy S. Mikhail ◽  
Akolisa Anyaegbunam ◽  
David Garfinkel ◽  
Prabhudas R. Palan ◽  
Jayasri Basu ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Plasma Levels ◽  
Beta Carotene

Estimate of antioxidant capacity and lipid peroxidation in plasma of healthy subjects

Open Medicine ◽  
2006 ◽  
Vol 1 (1) ◽  
pp. 23-34
Author(s):  
Anna Gorąca ◽  
Beata Skibska
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Plasma Concentrations ◽  
Beta Carotene ◽  
Alpha Tocopherol ◽  
Elderly Subjects ◽  
Total Antioxidant

AbstractSerum contains various antioxidant molecules that may provide important protection against free radical attack. The aim of this work was to assess the total antioxidant capacity of plasma and a marker of lipid per oxidation [(thiobarbituric acid-reactive substances (TBARS)] in plasma of healthy smoking and non-smoking young and elderly subjects. In addition, we investigated plasma concentrations of α-tocopherol, β-carotene, and ascorbic acid. In in vitro experiments, the effects of exogenous compounds (ascorbic acid, uric acid, Trolox) on total ferric-reducing activity of plasma (FRAP) were also tested. We demonstrated that total antioxidant capacity of plasma obtained from healthy non-smoking young subjects was significantly higher than plasma antioxidant capacity of smoking elderly subjects. The concentration of TBARS in young non-smoking volunteers was lower than that in young smokers. The concentration of TBARS in elderly non-smoking volunteers was lower than in elderly smokers. Plasma concentrations of alpha-tocopherol, beta-carotene and ascorbic acid were significantly lower in elderly smoker than in elderly non-smokers of the same age. No difference in the plasma levels of alpha-tocopherol, beta-carotene and ascorbic acid were found in 22-year-old smoking and non-smoking subjects. In vitro addition of ascorbic acid, uric acid, or Trolox to plasma samples significantly increased their total antioxidant capacity. Decrease of FRAP values and increase of TBARS concentrations is a significant physiologic condition of the aging process. Supplementation of antioxidants could be useful for the enhancement of antioxidant screen in plasma.

scholarly journals Quality Evaluation of Fresh Papaya Fruits Stored in Evaporative Coolers

2020 ◽  
pp. 6-16
Author(s):  
A. A. Balogun ◽  
C. C. Ariahu
Keyword(s):  
Ascorbic Acid ◽  
Relative Humidity ◽  
Storage Period ◽  
Beta Carotene ◽  
Soluble Solids ◽  
Microbial Load ◽  
Clay Brick ◽  
Burnt Clay ◽  
Ambient Storage ◽  
Evaporative Cooler

A study was conducted to assess the performance of evaporative coolers for the storage of fruits and vegetables. The evaporative coolers used for this study consist of double-walled rectangular brick construction (1.29 × 2.55 × 2.56) m external and (1.13 × 1.27 × 2.08) m, internal, (length × width × height) with the inter-space filled with river bed sand saturated with water. In this study, ambient storage temperature ranged from 26.6 to 28.7oC with relative humidity which ranged from 64.7 to 85.2 percent. However, NBBEC storage recorded lower temperature within the range of 24.3 to 25.3oC and relative humidity which ranged from 88.8 to 91.2 percent while ABBEC storage recorded the least temperature which ranged from 23.0 to 24.1oC with highest relative humidity which ranged from 91.4 to 92.8 percent. The papaya fruits stored in the coolers and in ambient were evaluated for weight loss, total soluble solids, pH, total titratable acidity, ascorbic acid, beta carotene content and microbial load. TTA, ascorbic acid, beta carotene decreased; while pH and TSS increased with storage period. In ambient storage, fresh papaya fruits stored in evaporative coolers have lower microbial load compared to ambient storage with aluminum cladding of the cooler (ABBEC) further improving microbial quality and shelf life. The pawpaw fruits stored in the aluminum cladded burnt-clay-brick evaporative cooler (ABBEC) remained fresh and firm for ten days compared to three days in non-cladded burnt-clay-brick evaporative cooler (NBBEC) and four days in ambient storage.

scholarly journals Changes in Beta-Carotene, Ascorbic Acid and Sensory Properties in Fermented, Solar-Dried and Stored Cowpea Leaf Vegetables

2007 ◽  
Vol 7 (14) ◽  
pp. 01-20
Author(s):  
Charity N. Muchoki ◽  
◽  
Jasper K. Imungi ◽  
Peter O.L
Keyword(s):  
Ascorbic Acid ◽  
Rural Communities ◽  
Tap Water ◽  
Beta Carotene ◽  
Heat Treating ◽  
Storage Conditions ◽  
Hot Water ◽  
Heat Treated ◽  
Leaf Vegetables ◽  
Dried Vegetables

This study was conducted to determine the effect of fermentation, solar drying and packaging on the nutritional, sensory and keeping properties of cowpea leaf vegetables. The cowpea leaves were purchased from the local markets, sorted to remove the blemished, leaves and foreign materials, washed in running tap water then drained. The vegetables were divided into three batches of 16kg. One batch was heat treated in hot water for 3 minutes then cooled to ambient temperatures, drained and solar-dried. The second portion was acidified to a pH of 3.8, heat-treated, and then solar dried. The third portion was fermented for 21 days, heat-treated, and then solar dried. The three batches of vegetables were spread at different times on drying trays at the rate of 4kg/m2 and dried in a solar drier to approximate moisture content of 10%. The dried vegetables were packaged in either polyethylene bags or Kraft company paper bags and stored for three months at 18o C, 22o - 26o C or 32o C. Fermentation, heat-treating and drying of vegetables retained substantial levels of the vitamins: beta-carotene 91% and ascorbic acid 15%. Storage of the dried vegetables led to loss in both vitamins. The retention of beta-carotene and ascorbic acid at the end of storage, were 23% - 52% and 4% - 7% respectively, depending on storage conditions. Samples stored at 32o C had the highest losses, while those stored at 18o C had the lowest in both vitamins. Samples stored in Kraft paper bags had the highest losses in both vitamins. The duration and temperature of storage and the packaging material did not have significant effect on the sensory attributes of the dried vegetables. Increased acceptability of the fermented-dried vegetables in rural communities would assist in alleviating micronutrient malnutrition, help in dealing with the issue of seasonality and increase food security especially during the dry season.

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