ASCORBIC ACID IN RED RASPBERRY FRUIT AND LEAVES

1970 ◽  
Vol 50 (4) ◽  
pp. 457-461 ◽  
Author(s):  
S. O. FEJER ◽  
F. B. JOHNSTON ◽  
MADELEINE M. HAMMILL ◽  
L. P. S. SPANGELO
Keyword(s):  
Ascorbic Acid ◽  
Acid Content ◽  
Dehydroascorbic Acid ◽  
Ascorbic Acid Content ◽  
Leaf Fall ◽  
Red Raspberry ◽  
Present Stage ◽  
Present Material ◽  
Positive Correlations ◽  
Selection Of

Ascorbic acid content of leaves of 30 red raspberry clones was much higher than that of the fruits. In spite of seasonal variation both in leaf and fruit, ascorbic acid content of any clone was relatively similar in the same seasons of two consecutive years. However, the relation of leaf to fruit ascorbic acid was very variable between harvests, ranging from significantly negative to positive correlations. Thus, a selection of high ascorbic acid in the leaf to increase this compound in the fruit is not possible at the present stage, although there were indications that the content of the leaf is inherited by the seedlings. Dehydroascorbic acid was very low in the fall-fruiting Comet raspberry. High ascorbic acid content was related to early leaf fall in the present material.

Intracellular ascorbic acid enhances the DNA single-strand breakage and toxicity induced by peroxynitrite in U937 cells

2001 ◽  
Vol 356 (2) ◽  
pp. 509-513 ◽  
Author(s):  
Andrea GUIDARELLI ◽  
Roberta de SANCTIS ◽  
Barbara CELLINI ◽  
Mara FIORANI ◽  
Marina DACHÀ ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Acid Content ◽  
Dehydroascorbic Acid ◽  
Ascorbic Acid Content ◽  
Single Strand ◽  
Reduced Form ◽  
U937 Cells ◽  
Intracellular Content ◽  
Independent Mechanism ◽  
Strand Breakage

A well-established protocol to increase the intracellular content of ascorbic acid was used to investigate the effects of the vitamin on DNA single-strand breakage and toxicity mediated by authentic peroxynitrite (ONOO−) in U937 cells. This protocol involved exposure for 60min to 100μM dehydroascorbic acid, which was taken up by the cells and converted into ascorbic acid via a GSH-independent mechanism. At the time of exposure to ONOO−, which was performed in fresh saline immediately after loading with dehydroascorbic acid, the vitamin present in the cells was all in its reduced form. It was found that, in cells that are otherwise ascorbate-deficient, an increase in their ascorbic acid content does not prevent, but rather enhances, the DNA-damaging and lethal responses mediated by exogenous ONOO−. These results therefore suggest that acute supplementation of ascorbic acid can be detrimental for individuals with pathologies associated with a decrease in ascorbic acid and in which ONOO− is known to promote deleterious effects.

THE SEASONAL VARIATION IN THE ASCORBIC ACID CONTENT OF EDIBLE WILD PLANTS COMMONLY FOUND IN NEW BRUNSWICK

1947 ◽  
Vol 25c (3) ◽  
pp. 95-101 ◽  
Author(s):  
Elizabeth A. Baird ◽  
Muriel G. Lane
Keyword(s):  
Ascorbic Acid ◽  
Seasonal Variation ◽  
New Brunswick ◽  
Acid Content ◽  
Dehydroascorbic Acid ◽  
Ascorbic Acid Content ◽  
Wild Plants ◽  
Edible Wild Plants ◽  
Green Leaves

The ascorbic acid content in the leaves of 10 wild plants that grow in New Brunswick was determined at approximately two-week intervals from June to September. 'Free' and 'total' dehydroascorbic acid were measured, using the method of Roe. The total ascorbic acid is highest in young green leaves. After the plants have flowered the ascorbic acid decreases. It becomes almost negligible when the leaves have wilted and turned brown. 'Free' dehydroascorbic acid was present in all 10 plants in small quantity. It fluctuated from time to time but remained fairly constant for all the plants during the period of investigation, and was independent of the 'total' value for that plant. The values for ascorbic acid have been measured for ripe strawberries, for fiddleheads, and for several common vegetables over the same summer months. They have been tabulated for comparison with the values of ascorbic acid of the 10 wild plants.

Concentrations of vitamin C in milk of sows and in plasma of piglets

1995 ◽  
Vol 75 (2) ◽  
pp. 275-277 ◽  
Author(s):  
M. Hidiroglou ◽  
T. R. Batra
Keyword(s):  
Ascorbic Acid ◽  
Blood Plasma ◽  
Acid Concentration ◽  
Acid Content ◽  
High Performance ◽  
Dehydroascorbic Acid ◽  
Ascorbic Acid Content ◽  
Plasma Ascorbic Acid ◽  
Maternal Milk ◽  
Key Words Ascorbic Acid

Colostrum or milk samples from 10 sows and blood plasma samples from 68 piglets were taken between 0 and 28 d after farrowing and analyzed for ascorbic acid and dehydroascorbic acid by high-performance liquid chromatography with electro-chemical detector. Ascorbic acid content of colostrum (265.0 μm mL−1) was more than twice that of subsequently produced milk (100.0 μg mL−1) at 7 d of age. Ascorbic acid content of blood plasma of piglets at birth after uptake of colostrum was 13.1 μg mL−1, which slowly declined during the first 28 d of age to 3.2 μg mL−1. The dehydroascorbic acid concentration in the plasma of piglets ranged from 3.0 μg mL−1 to 3.9 μg mL−1from 7 d to 28 d of age. There was a significant positive correlation between piglet plasma ascorbic acid and maternal milk ascorbic acid concentration. Key words: Ascorbic acid, dehydroascorbic acid, colostrum

Analysis of ascorbic acid content in various fruits and vegetables by spectrofluorimetric methods

Planta Medica ◽  
2011 ◽  
Vol 77 (12) ◽  
Author(s):  
A Haskovic ◽  
A Copra Janicijevic ◽  
A Topcagic ◽  
L Klepo ◽  
A Kapur ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Acid Content ◽  
Fruits And Vegetables ◽  
Ascorbic Acid Content

scholarly journals Silicon attenuates calcium deficiency by increasing ascorbic acid content, growth and quality of cabbage leaves

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dalila Lopes da Silva ◽  
Renato de Mello Prado ◽  
Luis Felipe Lata Tenesaca ◽  
José Lucas Farias da Silva ◽  
Ben-Hur Mattiuz
Keyword(s):  
Ascorbic Acid ◽  
Nutrient Solution ◽  
Acid Content ◽  
Dry Matter ◽  
Ascorbic Acid Content ◽  
Calcium Deficiency ◽  
Ca Deficiency ◽  
Leaf Water Loss ◽  
Nutrient Solutions

AbstractCalcium (Ca) deficiency in cabbage plants induces oxidative damage, hampering growth and decreasing quality, however, it is hypothesized that silicon (Si) added to the nutrient solution may alleviate crop losses. Therefore, this study aims at evaluating whether silicon supplied in the nutrient solution reduces, in fact, the calcium deficiency effects on cabbage plants. In a greenhouse, cabbage plants were grown using nutrient solutions with Ca sufficiency and Ca deficiency (5 mM) without and with added silicon (2.5 mM), arranged as a 2 × 2 factorial in randomized blocks, with five replications. At 91 days after transplanting, the plants were harvested for biological evaluations. In the treatment without added Si, Ca deficiency promoted oxidative stress, low antioxidant content, decreased dry matter, and lower quality leaf. On the other hand, added Si attenuated Ca deficiency in cabbage by decreasing cell extravasation while increasing both ascorbic acid content and fresh and dry matter, providing firmer leaves due to diminished leaf water loss after harvesting. We highlighted the agronomic importance of Si added to the nutrient solution, especially in crops at risk of Ca deficiency.

COMPARISON OF ASCORBIC ACID CONTENT IN IMPORTED TOMATOES AND IN CULTIVARS GROWN IN NOVA SCOTIA

1987 ◽  
Vol 67 (1) ◽  
pp. 331-335
Author(s):  
HAK-YOON JU ◽  
W. JOHN MULLIN
Keyword(s):  
Ascorbic Acid ◽  
Nova Scotia ◽  
Vitamin C ◽  
Acid Content ◽  
Ascorbic Acid Content ◽  
Fresh Weight ◽  
Atlantic Region ◽  
Significant Difference ◽  
Cluster Location ◽  
Greenhouse Tomatoes

The ascorbic acid (vitamin C) content of fresh imported field tomatoes and Nova Scotia greenhouse and field tomatoes was determined on a bi-weekly basis during the period of availability of each type of tomato to the Nova Scotia consumer in 1984. The average ascorbic acid contents of imported and Nova Scotia field and greenhouse tomatoes were 13.3, 16.7 and 17.7 mg 100 g−1 fresh weight, respectively. A study of nine recommended or promising field tomatoes for the Atlantic region showed significant differences in ascorbic acid content among the cultivars. The cultivar Quick Pick had the highest ascorbic acid content of 22.5 ± 1.5 mg 100 g−1, the cultivar Campbell 18 had the lowest content, 12.0 ± 2.9 mg 100 g−1. In Dombito greenhouse tomatoes the stage of maturity and the effect of cluster location were tested against ascorbic acid content. The lowest ascorbic acid content of 9.1 ± 1.0 mg 100 g−1 was found with the small green tomatoes while others from mature green to overripe contained 14.0–16.7 mg 100 g−1. Tomatoes from different cluster locations showed no significant difference in ascorbic acid content.Key words: Vitamin C, L-ascorbic acid, tomatoes

scholarly journals Antioxidant Potential in Different Parts and Callus ofGynura procumbensand Different Parts ofGynura bicolor

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Vijendren Krishnan ◽  
Syahida Ahmad ◽  
Maziah Mahmood
Keyword(s):  
Ascorbic Acid ◽  
Acid Content ◽  
Phenolic Content ◽  
Reducing Power ◽  
Ascorbic Acid Content ◽  
Total Phenolic ◽  
Total Flavonoid Content ◽  
Dpph Radical ◽  
Flavonoid Content ◽  
Different Parts

Plants from Gynura family was used in this study, namely,Gynura procumbensandGynura bicolor.Gynura procumbensis well known for its various medicinal properties such as antihyperglycaemic, antihyperlipidaemic, and antiulcerogenic; meanwhile,G. bicolorremains unexploited. Several nonenzymatic antioxidants methods were utilized to study the antioxidant capacity, which include ferric reducing antioxidant power (FRAP), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay, total flavonoid content, total phenolic content, and ascorbic acid content determination. DPPH assay revealsG. procumbensshoot as the lowest (66.885%) andG. procumbensroot as the highest (93.499%) DPPH radical inhibitor. In FRAP assay, reducing power was not detected inG. procumbensleaf callus (0.000 TEAC mg/g FW) wherebyG. procumbensroot exhibits the highest (1.103 TEAC mg/g FW) ferric reducing power. Total phenolic content and total flavonoid content exhibited similar trend for both the intact plants analysed. In all antioxidant assays,G. procumbenscallus culture exhibits very low antioxidant activity. However,G. procumbensroot exhibited highest phenolic content, flavonoid content, and ascorbic acid content with 4.957 TEAC mg/g FW, 543.529 QEµg/g FW, and 54.723 µg/g FW, respectively. This study reveals thatG. procumbensroot extract is a good source of natural antioxidant.

Sign in / Sign up

Export Citation Format

Share Document