scholarly journals L-ascorbic acid, β-carotene and lycopene content in papaya fruits (Carica papaya) with or without physiological skin freckles

2008 ◽  
Vol 65 (3) ◽  
pp. 246-250 ◽  
Author(s):  
Leandro Marelli de Souza ◽  
Karla Silva Ferreira ◽  
José Benício Paes Chaves ◽  
Sílvio Lopes Teixeira
Keyword(s):  
Ascorbic Acid ◽  
Skin Disease ◽  
Acid Content ◽  
High Performance ◽  
Nutritive Value ◽  
Ascorbic Acid Content ◽  
Carotene Content ◽  
Lycopene Content ◽  
Papaya Pulp ◽  
Β Carotene

The Skin Freckles is a papaya skin disorder that depreciates de fruit appearance and hampers its commercialization, although not lowering its nutritive value. Being the papaya a good source of ascorbic acid, β-carotene and licopene this research aimed at determining L-ascorbic acid, β-carotene and licopene content in papaya fruits, from 'Formosa' and 'Solo' group varieties, with and without apparent physiological skin disease (skin freckles). Fruits were harvested in the Southeast Region of Brazil. L-ascorbic acid content was determined by titration technique. β-carotene and licopene contents were determined by high performance liquid chromatography technique (HPLC). L-ascorbic acid content in papaya fruits ranged from (59.9 ± 3.4) mg 100 g-1 to (112.4 ± 12.6) mg 100 g-1 in fresh papaya pulp. β-carotene content ranged from (0.19 ± 0.07) mg 100 g-1 to (0.56 ± 0.09) mg 100 g-1 and that of licopene ranged from (1.44 ± 0.28) mg 100 g-1 to (3.39 ± 0.32) mg 100 g-1 in fresh papaya pulp. L-ascorbic acid contents of papaya fruits with skin disease averaged 7.0 mg 100 g-1 to 10.0 mg 100 g-1 higher than those of papaya fruits without skin freckles (P < 0.05).

scholarly journals A Rapid and Accurate Method for Estimating Tomato Lycopene Content by Measuring Chromaticity Values of Fruit Purée

2004 ◽  
Vol 129 (5) ◽  
pp. 717-723 ◽  
Author(s):  
Joshua R. Hyman ◽  
Jessica Gaus ◽  
Majid R. Foolad
Keyword(s):  
Total Variation ◽  
High Performance ◽  
Crop Improvement ◽  
Accurate Method ◽  
Carotene Content ◽  
Require Time ◽  
Wide Range ◽  
Lycopene Content ◽  
Β Carotene ◽  
Tomato Genotypes

Lycopene is the red pigment and a major carotenoid in tomato (Lycopersicon esculentum Mill.) fruit. It is a potent natural antioxidant, and the focus of many tomato genetics and breeding programs. Crop improvement for increased fruit lycopene content requires a rapid and accurate method of lycopene quantification. Among the various available techniques, high-performance liquid chromatography (HPLC) can be accurate, however, it is laborious and requires skilled labor and the use of highly toxic solvents. Similarly, spectrophotometric methods, although easier than HPLC, also require time-consuming extractions and may not be as accurate as HPLC, as they often overestimate fruit lycopene content. Colorimetric estimation of fruit lycopene using chromaticity values has been proposed as an alternative rapid method. Previous studies that examined the utility of this technique, however, were confined to the evaluation of only one or few cultivars and, therefore, lacked broad applicability. The purpose of the present study was to examine the utility of chromaticity values for estimating lycopene and β-carotene contents in tomato across diverse genetic backgrounds. Measurements of the chromaticity values (L*, a*, b*, C*, h*) were taken on whole fruit and purée of 24 tomato genotypes and were compared with HPLC measurements of fruit lycopene and β-carotene. Examination of different regression models indicated that a model based on the transformed value a*4 from purée measurements explained up to 94.5% of the total variation in fruit lycopene content as measured by HPLC. When this model was applied to a second set of fruit harvested at a later date from the same 24 genotypes, it explained more than 90% of the total variation in lycopene, suggesting its reliability. The best estimation for β-carotene content was obtained by using the b* chromaticity value from whole fruit measurements or the transformed a*2 value from purée measurements. Neither model, however, could explain more than 55% of the variation in β-carotene content, suggesting that chromaticity values may not be appropriate for estimating tomato β-carotene content. The overall results indicated that fruit lycopene content could be measured simply and rather accurately across a wide range of tomato genotypes using chromaticity values taken on fruit purée.

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

Modeling and optimization of solar-assisted heat pump drying of pumpkin slice

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yaping Dai ◽  
Kaibo Deng
Keyword(s):  
Ascorbic Acid ◽  
Response Surface Methodology ◽  
Energy Consumption ◽  
Heat Pump ◽  
Acid Content ◽  
Ascorbic Acid Content ◽  
Carotene Content ◽  
Content Type ◽  
Heat Pump Drying ◽  
Reduce Energy Consumption

PurposeTo reduce energy consumption, the time needed of drying, and the loss of ß-carotene content, and ascorbic acid content, response surface methodology (RSM) was employed for optimization.Design/methodology/approachTo reduce energy consumption, the time needed of drying, and the loss of ß-carotene content, and ascorbic acid content, response surface methodology (RSM) was employed for optimization.FindingsThe results show that the optimum solar-assisted heat pump drying (SAHPD) conditions for drying pumpkin slice were: drying temperature of 67.40 °C, loading density of 1.05 kg/m3, and material thickness of 4 mm. Under these conditions, slice of pumpkin were dried in 440.637 min, where the unit energy consumption, ascorbic acid content, and ß-carotene content were 16.737 kJ/g, 25.682 mg/ (100–g dried sample), and 10.202 mg/g, respectively. The structure of the samples dried using the optimized SAHPD method exhibited a more complete cell morphology than those dried using heat pump drying when examined using scanning electronic microscopy.Originality/valueThis suggests that the optimized SAHPD conditions used in this study are important for production and processing.

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
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