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[en] Exposure of meat to radiation would help to prevent the pathogenic microbial growth and thus qualified for longer shelf life. However, high doses of radiation may adversely affect the nutrient value and original quality of the meat. The present study was conducted with a view to assess the nutrient value of the meat derived from the mud crab, Scylla serrata after subjecting dose depended electron beam irradiation and subsequent cold storage at -8℃ and -20° C. For this purpose, three sets of healthy, wild captured intermolt crabs were used each set comprising four crabs. Three crabs from each set were irradiated at doses 0.5 kGy, 1 kGy, and 2 kGy respectively with a dose rate of 3.8 kGy per hour. The remaining one (from all three sets) was considered as non-irradiated control. The optimization of radiation dosage required to maintain the nutrient value of crab meat during the shelf life is also discussed
[en] At present, the Govorun supercomputer is used for both theoretical studies and event simulation for the MPD experiment of the NICA mega project. To generate simulated data of the MPD experiment, the computing components of the Govern supercomputer, i.e. Skylake (2880 computing cores) and KNL (6048 computing cores), are used; data are stored on the ultrafast data storage system (UDSS) under the management of the Lustre file system with a subsequent transfer to cold storages controlled by the EOS and ZFS file systems. UDSS currently has five storage servers with 12 SSD disks using the NVMe connection technology and a total capacity of 120 TB, which ensures low time of access to data and a data acquisition/output rate of 30 TB per second. Due to the UDSS high performance, by September 2019 over 100 million events for the MPD experiment have already been generated and more than 30 million events have already been reconstructed. In future, other MC generators are expected to be used as well. The implementation of different computing models for the NICA megaproject requires confirmation of the model’s efficiency, i.e. meeting the requirements for the time characteristics of acquiring data from detectors with their subsequent transfer to processing, analysis and storage, as well as the requirements for the efficiency of event modeling and processing in the experiment. For these purposes it is necessary to carry out tests in a real software and computing environment, which should include all the required components. At present, the Govorun supercomputer is such an environment; it contains the latest computing resources and a hyperconvergent UDSS with a software-defined architecture, which allows providing a maximum flexibility of data storage system configurations. It is planned to use the DIRAC software for managing jobs and the process of reading out/recording/processing data from various types of storages and file systems. All the enumerated above will allow one to check a basic set of data storage and transmission technologies, simulate data flows, choose optimal distributed file systems and increase the efficiency of event modeling and processing. The studies in the given direction were supported by the RFBR grant ('Megascience – NICA'), №18-02-40101 and 18-02-40102.
[en] The present study was carried out during two successive seasons of 2014 and 2015 on “Anna”apples. The effect of gamma irradiation of 0.5 and 1.0 kGy in addition to edible coating with paraffin oil and glycerol on the shelf-life and quality of apples during cold storage at 0°C, 90-95% RH for 90 days was evaluated.Gamma irradiation of 0.5 and 1.0 kGy caused a reduction in blue mold incidence (%) caused by Penicillium expansumin from 20.2% to 10.0% and 6.5% after 90 days cold storage however, in artificial inoculated fruits blue mold incidence reduced from 40% to 20.2% and 18.7% after 30 days.At 60 days,this level was reduced from 85% to 36.1% and 30%. At the end of cold storage period,the blue mold was reduced from 100% to 55.7% and 42.1%, respectively.The results indicated that irradiation and edible coating greatly affected the storage quality of apples. Edible coating paraffin oil or glycerol as well as irradiation of 1.0 kGy were effective in increasing storability of apples during storage compared to 0.5 kGy irradiation doses.These treatments decreased discarded and weight loss percentage and increased firmness, shelf life and calcium flesh of apples content. It could be noticed that untreated apples could be stored for 60 days where the treated ones by irradiation of 0.5 kGy could be stored for 75 days.However edible coated apples or irradiation with 1.0 kGy could increase the storage period tobe 90 days
[en] Fruit softening and quality management is very important to reduce postharvest losses in peach. Present study was conducted to observe the effect of cultivars and harvest locations on peach fruit softening and quality during ripening following cold storage. Fruits of two peach cultivars Prunus persica (L.) Batsch., harvested from two different locations were evaluated at ripening for their postharvest fruit softening and quality after 28 days of low temperature storage. Fruit harvested from Sillanwali exhibited significantly higher ethylene production, respiration rate, fruit weight loss, ascorbic acid contents, activities of fruit softening enzymes (endo-polygalacturonase (endo-PG), exo-polygalacturonase (exo-PG)) and significantly lower fruit firmness, ground colour, soluble solid contents (SSC), SSC:TA, total phenolic contents (TPC), antioxidant scavenging activity (ASA), activities of catalase (CAT), peroxidase (POD), superoxide dismutase (SOD), and pectin esterase (PE) enzymes as compared to fruit harvested from Soan Valley. Peach cv Early Grand showed significantly higher ethylene production, respiration rate, ascorbic acid contents, activities of CAT, endo-PG and exo-PG enzymes, whereas lower fruit weight loss, fruit firmness, SSC, SSC:TA, TPC, ASA, activities of POD, SOD, PE and enzymes than Flordaking. Harvest location and cultivar significantly influenced various physico-chemical attributes including activities of various fruit softening and antioxidative enzymes in peach fruit during ripening after low temperature storage. (author)