Influence of gamma radiation on the properties of l-ascorbic acid crystal for photonic applications

2021 ◽  
Vol 32 (6) ◽  
pp. 8174-8182
Author(s):  
Sindhu Tilak ◽  
H. M. Suresh Kumar
1965 ◽  
Vol 5 (18) ◽  
pp. 289 ◽  
Author(s):  
PA Wills

Tasmanian Up-to-date, Kennebec, Sebago, and Sequoia tubers were treated with low doses of gamma radiation to inhibit sprouting and were subsequently stored at 68�F or 45�F. Tubers were examined at bi-monthly intervals for some, or all, of the following biochemical constituents : dry matter, thiamin, reduced ascorbic acid, dehydroascorbic acid, total ascorbic acid, soluble reducing sugars, sucrose, total sugars, and starch. Radiation, independent of dose level, led to lower dry matter contents in the Up-to-date, Kennebec, and Sequoia tubers after four months storage, and in the Sebago tubers after six months storage at 68�F, but not at 45�F, when compared to the controls. The thiamin content of Up-to-date tubers w-as not influenced by radiation (16,000 rads). Storage w-as a more important factor than radiation in altering the ascorbic acid content of tubers. Radiation maintained, or even increased the normal level. Radiation increased the soluble reducing sugar content of Sequoia tubers, the total sugar of Sequoia and Sebago tubers, and the sucrose content of the Sebago tubers, but had little effect on the starch content of these varieties. Storage influenced some of these constituents, particularly in the Sebago variety.


2018 ◽  
Vol 21 (0) ◽  
Author(s):  
Ana Carolina Loro ◽  
Victor Wilson Botteon ◽  
Marta Helena Fillet Spoto

Abstract Ionizing radiation can be used for different purposes in the food industry. In this study, the effect of irradiation doses (0, 0.5, 1.0 and 1.5 kGy) on the quality parameters of long life tomatoes (Lycopersicon esculentum Mill.), was evaluated during 4 storage periods (1, 7, 14 and 21 days). The different treatments were evaluated by analysing for colour, pH, total soluble solids (TSS), total titratable acidity (TTA), ratio (TSS/TTA), hardness, total lycopene and ascorbic acid contents, weight loss and maturation stage (O2 /CO2 ratio) for all the storage periods. The tomato samples were irradiated in a Co60 irradiator and maintained at 22 °C ± 1 °C. The quality of the tomato fruits was influenced by the gamma radiation basically by making the fruits softer and not degrading the ascorbic acid and lycopene contents at the doses evaluated. The irradiation process used in the doses evaluated was promising with respect to maintaining the quality parameters of long life tomatoes.


1969 ◽  
Vol 56 (1) ◽  
pp. 26-32
Author(s):  
José Cuevas-Ruiz ◽  
H. D. Graham ◽  
R. A. Luse

The effects of gamma radiation were investigated on the content of ascorbic acid, total carotenoids, total carbohydrates and titratablc acidity in five varieties of mangos grown in Puerto Rico. Irradiation with 75-Krad doses did not significantly influence biochemical components. Subsequent changes were related closely to delay in fruit ripening, and reduction of fungal spoilage, effected by the radiation pasteurization. Radiation at the 75-Krad level extended shelf life to 7 days.


1964 ◽  
Vol 19 (11) ◽  
pp. 1017-1020 ◽  
Author(s):  
G. M. Patel ◽  
K. C. Patel

Amylase activity of groundnut with reference to gamma radiation in the range of 10 to 120 Kr units and the period of germination has been discussed. Dry seeds contain little amylase activity. Amylase activity is found to increase with period of germination and after reaching a maximum value it once again decreases. Radiation has inhibitory effect on the activity. Amylase activity is newly formed during sprouting of seeds. Ascorbic acid produced during germination of these seeds also inhibits the amylase activity.


1961 ◽  
Vol 7 (4) ◽  
pp. 535-541 ◽  
Author(s):  
John R. Polley

Factors influencing the effects of gamma, irradiation on influenza A(PR8) virus suspensions have been investigated. In purified virus suspensions in physiological saline, the hemagglutinin was destroyed more rapidly than the infectivity. The addition of reagents such as histidine, sodium p-aminohippurate, ascorbic acid, or cystine to the saline suspension reversed this effect. It was also found that the effect of a given amount of gamma radiation on the infectivity and hemagglutinin was similar regardless of whether the radiation was administered as a single dose or as two or four divided doses on different days. It is possible to calculate the amount of radiation required to destroy the infectivity and yet retain most of the hemagglutinin content, If a given dose of radiation has been insufficient to produce complete virus inactivation, the suspension can be subjected to a further dose, the amount of which can be exactly calculated, without destroying the hemagglutinin. These experiments were repeated with other strains of influenza A and B with similar results. The application of this work to the preparation of virus vaccines is being investigated and will be reported later.


ChemInform ◽  
2001 ◽  
Vol 32 (4) ◽  
pp. no-no
Author(s):  
Janusz Madaj ◽  
Yoko Nishikawa ◽  
V. Prakash Reddy ◽  
Peter Rinaldi ◽  
Tadao Kurata ◽  
...  

2014 ◽  
Vol 83 (6) ◽  
pp. 064002 ◽  
Author(s):  
Yoshihiro Yamazaki ◽  
Mitsunobu Kikuchi ◽  
Akihiko Toda ◽  
Jun-ichi Wakita ◽  
Mitsugu Matsushita

2019 ◽  
pp. 26-29

Efecto de la radiación gamma sobre la vitamina C Effect of gamma radiation on vitamin C Johnny Vargas R. Instituto Peruano de Energía Nuclear. Av. Canadá 1470 Lima 41 DOI: https://doi.org/10.33017/RevECIPeru2011.0005/ RESUMEN Uno de los compuestos orgánicos más sensibles a la temperatura, almacenamiento y radiaciones es el ácido ascórbico. En una planta de irradiación para el tratamiento cuarentenario, se procesarán frutas y hortalizas frescas; vegetales portadores de vitamina C. Se irradió a una determinada concentración la vitamina C (42,24 mg/100 ml) contenida en 3 diferentes sustratos: en jugo de naranja, en solución de agua y acido ascórbico puro en cristales, diluida posteriormente en agua; se aplicaron diferentes dosis de radiación gamma (0; 0,1; 1,0; y 10 kGy), la tasas de dosis fue 7,433 Gy/min. Los resultados mostraron que los mayores porcentajes de destrucción vitamina C irradiada a las dosis respectivas se presentaron en la solución de vitamina C contenida en agua,(15,62; 64,11 y 84,38 %) debido al efecto indirecto de la radiación gamma, luego en la vitamina C contenida en el jugo de naranja,(5,25; 7,33 y 50,50 %) esto es debido a que los otros constituyentes del jugo de naranja, tienen un efecto protector en la vitamina C contra las radiaciones, la vitamina C en cristales fue la que presentó los menores porcentajes de destrucción (3,13; 4,60 y 6,74%). Las diferentes muestras presentaron un contenido inicial de 42,24 mg de vitamina C por 100 ml del sustrato seleccionado. A la dosis de 0,1 kGy el porcentaje de destrucción en la solución de agua fue de 15,62 % mientras en el jugo de naranja y en cristales fue de 5,25 % y 3,13 % respectivamente; a la dosis de 1 kGy presentaron los siguientes porcentajes de destrucción solución 64,11; jugo 7,33 y cristales 4,60% respectivamente y a la dosis de 10 kGy la destrucción de la vitamina C en solución fue de 84,38; en jugo de naranja 50,50 % y en cristales 6, 79% demostrándose que el tipo de sustrato y la dosis juega un papel importante en los efectos de la radiación sobre la vitamina C. En una planta de irradiación para el tratamiento cuarentenario de frutas y hortalizas frescas se aplicaran dosis alrededor de 0,1 kGy, por lo que las pérdidas en vitamina C serán mínimas. Descriptores: Irradiación, Vitamina C, dosis, tratamiento cuarentenario. ABSTRACT One of the organic compounds more sensitive to temperature, storage and radiation is ascorbic acid. In an irradiation plant quarantine treatment, be processed fruits and vegetables, vegetable carriers of vitamin C. Was irradiated at a given concentration of vitamin C (42.24 mg/100 ml) contained in 3 different media: orange juice in water solution and pure ascorbic acid crystals, then diluted in water, we applied different doses of radiation Gamma (0, 0.1, 1.0, and 10 kGy), the dose rate was 7.433 GY / min.The results showed that higher percentages of vitamin C destruction irradiated to the respective doses were presented in the solution of vitamin C contained in water, (15.62, 64.11 and 84.38%) due to the indirect effect of gamma radiation , then vitamin C contained in orange juice, (5.25, 7.33 and 50.50%) This is because the other constituents of orange juice, have a protective effect of vitamin C against radiation, vitamin C crystals, was the one with the lowest percentages of Destruction (3.13, 4.60 and 6.74%). The different samples showed an initial content of 42.24 mg of vitamin C per 100 ml of the selected substrate. A dose of 0.1 kGy the percentage of destruction in the water solution was 15.62% while in the orange juice and glasses was 5.25% and 3.13% respectively, at a dose of 1 kGy showed the following percentages of destruction solution 64.11; juice crystals and 7.33 respectively 4.60% and the dose of 10 kGy the destruction of vitamin C in solution was 84.38, in orange juice 50.50 % and in crystals 6, 79% demonstrated that the type of substrate and the dose plays an important role in the effects of radiation on vitamin C. In an irradiation facility for quarantine treatment of fruits and vegetables are applied about 0.1 kGy dose, so the vitamin C losses will be minimal. Keywords: Irradiation, Vitamin C, dose, quarantine treatment.


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