No abstract available.
Ascorbic Acid* ; Pyuria* ; Vitamins*

No abstract available.
Ascorbic Acid* ; Child* ; Humans

No abstract available.
Ascorbic Acid ; Vitamins

Ascorbate (vitamin C) is a cofactor for a number of metabolic enzymes and is an indisputable essential vitamin C for humans. However, the potential of ascorbate as an anticancer agent has been a topic of controversy. A number of previous reports have addressed both positive aspects and limitations of ascorbate in cancer therapy. In this review, we briefly summarize the potential antitumor effects of ascorbate and its prospects for clinical use.
Ascorbic Acid ; Humans ; Vitamins

No abstract available.
Ascorbic Acid ; Neuralgia ; Vitamins

No abstract available.
Ascorbic Acid ; Dapsone ; Methemoglobinemia

No abstract available.
Ascorbic Acid* ; Vitamins*

No abstract available.
Ascorbic Acid* ; Vitamins*

The optimization and microwave assisted extraction of stem bark of Terminalia arjuna, quantitative estimation of the marker compounds arjunic acid and arjunolic acid using HPTLC and the evaluation of free radical scavenging activity has been performed in this study. The central composite design was used for optimization and the values of parameters for optimized batch of microwave assisted extraction were 1000W (Power), 3 minutes (Time) and 1/120 (Solid/solvent ratio). The solvent system to carry out the HPTLC was toluene: acetic acid: ethyl acetate (5: 5: 0.5) and quantitative estimation was done using standard equations obtained from the marker compounds. The in-vitro free radical scavenging activity was performed spectrophotometrically using ascorbic acid as standard. The value of estimated percentage yield of arjunic acid and arjunolic acid was 1.42% and 1.52% which upon experimentation was obtained as 1.38% and 1.51% respectively. The DPPH assay of the different batches of microwave assisted extraction and marker compounds taken suggested that the marker compounds arjunic acid and the arjunolic acid were responsible for the free radical scavenging activity as the batch having the maximum percentage yield of the marker compounds showed best free radical scavenging effect as compared to standard ascorbic acid. The IC₅₀ value of the optimized batch was found to be 24.72 while that of the standard ascorbic acid was 29.83. Hence, the yield of arjunic acid and arjunolic acid has direct correlation with the free radical scavenging activity of stem bark extract of Terminalia arjuna and have potential to serve as active lead compounds for free radical scavenging activity.
Acetic Acid ; Ascorbic Acid ; Microwaves* ; Terminalia* ; Toluene

PURPOSE: The aim of this work was to study the change in antioxidant activity depending on storage temperature and storage period in romaine and cherry. METHODS: The plant material was stored at 0.7 +/- 0.6degrees C, 3.5 +/- 2.8degrees C, and 4.7 +/- 1.4degrees C. Cherry and romaine were stored for a period of 9 days and 7 days, respectively. The cherry was taken from each group of samples at regular intervals of days and the romaine was taken from each group of samples at regular intervals of 2days. Vitamin C, total polyphenol, and total flavonoid stability and antioxidant capacity including DPPH, total antioxidant capacity (TAC) were measured. RESULTS: For cherry, the levels of TAC and flavonoid were higher at the 0.7 +/- 0.6degrees C condition than other conditions (p < 0.05). The polyphenol and vitamin C levels were not significantly different among storage conditions. In the case of romaine, the level of TAC was highly preserved until 7 days at the 0.7 +/- 0.6degrees C condition. Vitamin C level was significantly lower at the 3.5 +/- 2.8degrees C condition (p < 0.05). DPPH activity was highest at the 0.7 +/- 0.6degrees C condition (p < 0.05). DPPH activity was shown in order of 0.7 +/- 0.6degrees C > 4.7 +/- 1.4degrees C > 3.5 +/- 2.8degrees C. CONCLUSION: The results indicated that the narrow differences and fluctuation in temperature were associated with antioxidant capacity and it might enhance the nutritional shelf life of vegetables and fruits.
Ascorbic Acid* ; Fruit ; Plants ; Prunus* ; Vegetables ; Vitamins*