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Cobalt 60 - DOAJ

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Last Updated: 05 August 2022

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Analyzing the Effects of Gamma Radiation (Cobalt-60) on the Shelf Life and Nutritional Quality of Carrot (Daucus Carota)

Carrots can be stored for 6 months without impacting any quality characteristics, only if they are not infected with microorganisms that produce storage diseases. Gamma radiation has been demonstrated worldwide as a safe and effective method for prolonging fresh product shelf life. When compared to the traditional preservation techniques such as pasteurization, freezing, chemical, refining, or canning techniques, Gamma irradiation is more efficient in the preservation of carrots. Gamma radiation can increase the trade opportunity and export quality of fruit and vegetables grown in Pakistan. There are no adverse side effects on food and there are no adverse side effects on food, and there are no changes in the treated product's physical appearance, including the nutritional content. Food can be stored in Pakistan by including gamma irradiation effectively and economically under controlled circumstances.

Source link: https://doi.org/10.32350/BSR.0101.01


Immunization with native and cobalt 60-irradiated Crotalus durissus terrificus venom in swiss mice: assessment of the neutralizing potency of antisera

When blood samples were obtained on days one, 15, 21, 30, and 45, the venom's immunization with one LD50 of the venom was found; the challenges occurred on the 60th day. ELISA was effective at detecting, monitoring, and comparing mouse immune response during hyperimmunization. Natural titers produced with serum venom were similar to those made with irradiated venom. The irradiated venom made from Crotalus durissus tremendousus exhibited greater potency and neutralization capability than normal venom.

Source link: https://doi.org/10.1590/S1678-91992005000300008


Antioxidant activity of gamma cobalt-60 irradiated chitosan and vitamin E combination to lead acetate-induced rats

Although the potential of chitosan as a blood lead chelator and an antioxidant had been established, its usage was still not optimal. The antioxidant activity of chitosan's oxidative chitosan and vitamin E in lead acetate-induced rats could also be enhanced by vitamin E. The purpose of this research was to investigate the antioxidant activity of the mixture of Gamma Co-60 irradiated chitosan and vitamin E. Twenty-four rats, which were divided into six groups, were treated with the combination of gamma Co-60 irradiated chitosan and vitamin E 1000 IU. Lead acetate was induced in only by the positive control group, while treatment group 1 received an additional treatment of irradiated chitosan. The combination of Gamma Co-60 irradiated chitosan and vitamin E also raised the activity of various endogenous antioxidant enzymes and reduced lipid peroxidation, depending on the amount of vitamin E.

Source link: https://doi.org/10.4025/actascibiolsci.v44i1.59893


Effect of cobalt-60 gamma radiation on reproductive disturbance in freshwater prawn Macrobrachium rosenbergii (De Man, 1879)

The present study was intended to determine the effects of 60Co gamma radiation on freshwater prawn Macrobrachium rosenbergii's fecundity. Prawns were exposed to four different doses and their reproductive disturbances, including Gonadosomatic Index, Egg Clutch somatic Index, Egg Counts, and Egg hatching rates were estimated for four different doses and egg hatching rates. With an increasing number of doses, the number of dead larva has risen. Our results showed that even a low dose of ionizing radiation can damage freshwater crustacean M. rosenbergii's fecundities.

Source link: https://doi.org/10.1016/j.toxrep.2019.10.021


Simulation of Groundwater Flow and Migration of the Radioactive Cobalt-60 from LAMA Nuclear Facility-Iraq

This report provides a simulation of groundwater flow and advective-dispersive migration of radioactive Co-60 through three layers, which release or leak to groundwater from the Active Metallurgic Laboratory Nuclear Facility-Iraq due to the nuclear accident scenario. According to the study area and the contaminated area, the study area and the contaminated area were 12. 7 km2 and 0. 005625 km2, respectively. In six monitoring wells, water levels of the groundwater were measured. In the Tigris River, the PMWIN model estimated the flow for two scenarios of different levels of water level. u03bcg/m3 average maximum Co-60 concentrations at the end of Year 10 were 34. 86 and 37. 31 u03bcg/m3, respectively. The simulation hydraulic heads in the observation wells and the simulated plume of Co-60 were highly responsive to changes in the effective porosity, but not so sensitive to changes in other parameters of the dispersion and chemical reaction reactions, according to the sensitivity study.

Source link: https://doi.org/10.3390/w10020176


The role of Cobalt-60 in modern radiation therapy: Dose delivery and image guidance

linear accel-erators have been the first to pioneering radiation therapy, with techniques such as intensity-modulated radiation therapy and image-guid radiation therapy. We show that conformal dose delivery is likely and that Co-60 can be used as the radiation source in megavoltage computed tomography imaging, as shown by this report. These results complement our modeling results of Co-60 tomotherapy and provide a strong reason for continuing research of modern Cobalt-60 treatment devices.

Source link: https://doaj.org/article/4bac6bb31b01414a8d71fbbad700eb27


New formula for Calculation of Cobalt-60 Percent Depth Dose

Introduction: The use of dosimetry in radiotherapy has a vital role in minimizing the risk of tumor recurrence in a deterministic manner. The aim of this research is to devise a new method for calculating Cobalt-60 beam centerline percent depth doses. The average of the absolute differences between the formulas and the table was used to determine the consistency between the formulas and the table, and the formula with the least average was chosen as the best fitting formula for the purposes. The ratio of the differences between the tabulated and the calculated results using the number u0394 is equal to 0. 3152. Discussion and Conclusion: Hence, the estimated percent depth dose results based on this formula have a better age than the unpublished Cobalt-60 source's reported results.

Source link: https://doi.org/10.22038/ijmp.2005.8121


Practical and clinical considerations in Cobalt-60 tomotherapy

Cobalt-60 based radiation therapy continues to play a vital role in not only developing nations, where radiation therapy is extremely limited, but also in industrialized nations. By comparing Co-60 and 6 MV linac-based tomotherapy plans for a head and neck cancer as well as a prostate cancer case, we explore some of the scientific and clinical implications for Co-60 based tomotherapy. For beamlet dose measurements, the EGSnrc/BEAMnrc Monte Carlo code was used for modeling the treatment units with the MIMiC collimator and EGSnrc/DOSXYZnrc Monte Carlo code was used. Optimized tomotherapy doses were then produced for the H and N and prostate cases with an in-house inverse treatment planning service. Both Co-60 and 6 MV plans achieve the target and OAR goals, according to a quantitative review of the dose delivery and dose-volume histograms.

Source link: https://doaj.org/article/325b01ef34bc4ab68e10f321eac2a1b4


Staff dose calculation during a cobalt-60 source stuck

One of the most reported accidents in 60Co radiotherapy units is getting stuck, where one or two of the employees should go into the treatment room to deal with the situation. Using the Monte Carlo code MCNP4B, a three-dimensional model of a 60Co therapy room has been produced.

Source link: https://doi.org/10.2298/NTRP0601048M

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions