Practice for dosimetry in a gamma irradiation facility for radiation processing

1999 ◽  
Keyword(s):  
Gamma Irradiation ◽  
Radiation Processing

scholarly journals Gamma Irradiation Treatment of Cherry – Impact on Storage Quality, Decay Percentage and Post- Refrigeration Shelf-Life Extension

2015 ◽  
Vol 3 (1) ◽  
pp. 54-73 ◽  
Author(s):  
S Parveen ◽  
P. R Hussain ◽  
M. A Mir ◽  
F Shafi ◽  
S Darakshan ◽  
...  
Keyword(s):  
Gamma Irradiation ◽  
Shelf Life ◽  
Dose Range ◽  
Life Extension ◽  
Refrigerated Storage ◽  
Radiation Processing ◽  
Storage Quality ◽  
Shelf Life Extension ◽  
Ambient Storage ◽  
Gamma Irradiated

Present study was conducted to investigate the effect of gamma irradiation on storage quality and post refrigeration shelf-life extension of cherry. Two commercial varieties of cherry fruit (Misri and Double) after harvest at commercial maturity were gamma irradiated in the dose range of 0.3 -1.5 kGy followed by storage under ambient (temperature 25 ± 2 0C, RH 70%) and refrigerated (temperature 3 ± 1 0C, RH 80%) conditions. Among treatments, dose of 1.2 and 1.5 kGy effectively maintained the storage quality and significantly (p≤0.05) delayed the decay of the cherry varieties. In samples treated with dose of 1.2 and 1.5 kGy no decay was recorded up to 9 days of ambient storage. Under refrigerated conditions, cherry samples of control and those irradiated in the range of 0.3 – 0.9 kGy started decaying after 14 days of storage. No decay was observed in 1.2 and 1.5 kGy samples of both the varieties up to 28 days of refrigerated storage. The treatments of 1.2 and 1.5 kGy gave an extension of 6 days in shelf life of cherry varieties during post-refrigerated storage at 25 ± 2 0C, RH 70% following 28 days of refrigeration. Firmness comparison of treatments revealed that dose of 1.2 kGy was found to be better compared to 1.5 kGy due to decrease in firmness observed in cherry samples irradiated at 1.5 kGy. Thus, radiation processing of Kashmiri Cheries at 1.2 kGy can prove beneficial in facilitating the marketing of the fruit to distant places other than the local markets, thereby benefiting the growers.

Anthocyanin Contents Enhancement with Gamma Irradiated Mutagenesis in Blackberry (Rubus fructicosus)

2017 ◽  
Vol 12 (9) ◽  
pp. 1934578X1701200 ◽  
Author(s):  
Hyung Won Ryu ◽  
Byoung Ok Cho ◽  
Jaihyunk Ryu ◽  
Chang Hyun Jin ◽  
Jin-Baek Kim ◽  
...  
Keyword(s):  
Gamma Irradiation ◽  
High Performance ◽  
Leaf Shape ◽  
Array Detector ◽  
Radiation Processing ◽  
Triple Quadrupole Mass Spectrometer ◽  
Morphological Variations ◽  
Total Anthocyanins ◽  
Effects Of Radiation ◽  
Gamma Irradiated

Effects of radiation processing on the endogenous phytochemical production in blackberry ( Rubus fructicosus L.) were investigated through a metabolites analysis, using high-performance liquid chromatography with a diode array detector and a triple quadrupole mass spectrometer (HPLC-DAD-ESI-MS/MS). Four mutant cultivar lines (B, C, D, and E) were developed through the treatment of various doses of gamma irradiation (80, 60, 40, and 20 Gy) on the control blackberry cultivar (V3). These mutant cultivar lines were selected according to their different morphological variations in leaf shape and branch color. In the present study, we performed quantitative analyses of the four standard compounds in blackberry mutant cultivars: cyanidin-3- O-glucoside, cyanidin-3- O-xyloside, cyanidin-3- O-malonylglucoside, and cyanidin-3- O-dioxalylglucoside. The HPLC fingerprints displayed different profiles for six blackberry cultivar lines, demonstrating that the accumulation of total anthocyanins was affected by the gamma irradiation. The contents of cyanidin-3- O-glucoside and cyanidin-3- O-xyloside were high in the gamma-irradiated mutant cultivars of blackberries, compared to those of the control cultivar (V3) and the cross breeding cultivar ( R. fructicosus × R. parvifolius; CB). Cyanidin-3- O-malonylglucoside and cyanidin-3- O-dioxalylglucoside were also analyzed for their quantification in six cultivar lines, as metabolites contributing to the discrimination of six cultivar lines. Among gamma irradiated mutant blackberry cultivars, the highest dose level of gamma irradiation (80 Gy) resulted in the highest cyanidin-3- O-glucoside content enhancement. Therefore, these results can be useful to determine the optimized gamma irradiated value at which anthocyanins reaches an abundant level in Rubus species.

scholarly journals Effect of Radiation Processing on Water Absorption and Germination of Kodo and Kutki Millets

2021 ◽  
Author(s):  
Nidhi Kaushik ◽  
Komal Chauhan ◽  
Manjeet Aggarwal ◽  
Rakesh Khandal
Keyword(s):  
Gamma Irradiation ◽  
Water Absorption ◽  
Irradiation Dose ◽  
Absorption Capacity ◽  
Water Absorption Capacity ◽  
Radiation Processing ◽  
Germination Potential ◽  
Technology Intervention ◽  
Gamma Radiations

Background: In pursuit of exploring gamma irradiation as a technology-intervention for de-husking of Kodo and Kutki millets grown widely, authors of this paper observed that irradiation leads to easy de-husking of hardest Kodo grains. Calibration for appropriate dose of irradiation is needed and hence, this study was planned. This technology, if established, may check millet farmers shifting to other crops.Methods: Kodo and Kutki millets were irradiated by gamma radiations for doses of 0 kGy to 10 kGy. Water absorption capacity and germination potential of irradiated grains were measured to determine the dose for desired results.Result: Water absorption and germination potential of Kodo and Kutki grains improved on irradiation; dose of 2.5 kGy and above resulted in an increase in the quantity of water absorbed and rate of water absorption. The germination also increased but registering maxima at 7.5 kGy for Kodo and 5.0 kGy for Kutki. Irradiation at doses higher than maxima caused decline. Thus, appropriate dose of irradiation was found to be 7.5 kGy for Kodo and 5 kGy for Kutki.

scholarly journals Studies on Development of Polymeric Materials Using Gamma Irradiation for Contact and Intraocular Lenses

2009 ◽  
Vol 2009 ◽  
pp. 1-9 ◽  
Author(s):  
Pranshu Chhabra ◽  
Ruchi Gupta ◽  
Gunjan Suri ◽  
Mukti Tyagi ◽  
Geetha Seshadri ◽  
...  
Keyword(s):  
Gamma Irradiation ◽  
Contact Lenses ◽  
Polymeric Materials ◽  
Intraocular Lenses ◽  
Vinyl Pyrrolidone ◽  
Water Retention Capacity ◽  
Radiation Processing ◽  
Retention Capacity ◽  
Essential Properties ◽  
Hydrophilicity And Hydrophobicity

For the development of materials for contact lenses and intraocular lenses, the selection criteria is based on the (i) capacity to absorb and retain water, (ii) hydrophilicity and hydrophobicity, (iii) refractive index and (iv) hardness besides the other essential properties. Various monomers are being studied to develop suitable materials for such applications. Selection of suitable monomers that can be converted into optical materials of desired characteristics is the most essential step. In the present paper, an attempt has been made to develop suitable optical polymers based on 2-hydroxy ethyl methacrylate (HEMA), N-vinyl pyrrolidone (NVP), methyl methacrylate (MMA), methacrylic acid (MAA), and styrene. Compositions were prepared in such a way that polymers of varying hydrophilicity or hydrophobicity could be obtained keeping HEMA as the base (main) monomer. For polymerization, gamma irradiation (Co-60 as a source) was used. The results of the study showed that: (i) an increase in NVP and MAA content brought in an increase in hydrophilicity of polymerized HEMA (pHEMA), while the addition of styrene and MMA decreased hydrophilicity of polymerized HEMA (pHEMA), (ii) polymers for contact lenses with water retention capacity as high as >50 wt.% and as low as <10 wt% with varying content of suitable comonomers can be designed, (iii) polymeric materials for contact lenses can be made by using radiation processing such as Co-60 and (iv) a dose of 40 kGy was found to be ideal for purpose.

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