We manufacture and supply high quality Grading Machines includes rice grader, Rice Grading Machine, Sieve Cum Aspirator and Rice Aspirators , which are required to give final polishing of rice and separation of broken rice with non broken rice. The final polishing is done by milling roller friction and is adjusted by weights. We manufacture these machines as per the requirement of clients by following various international standards. These polishing machines are highly demanded in various rice mills and other industries. These machines are designed in order to achieve fine quality polishing in grains and other products.
Recently, the grain quality of rice in Japan has often been impaired by high temperatures during the grain-filling period. The chalky phenotype of rice kernels is a typical symptom found in high-temperature ripened plants. Detailed observation has shown that the chalky region of a rice kernel contains many small amyloplasts containing small, single starch granules and shows numerous interspaces among the amyloplasts (Zakaria et al. 2002). Yamakawa et al. (2007) reported that transcription of genes for the biosynthesis of starch was suppressed and expression of genes for starch-consuming enzymes was induced by high temperature. Thus, inhibition of starch accumulation in kernels occurs during ripening under high temperature and results in chalkiness of the rice grain.
However, the effect of elevated ozone concentration on starch accumulation in cereal kernels has been little reported. To our knowledge, only one study has measured starch synthesis enzyme activities in ozone-exposed wheat (Zhang et al. 2013). Thus, study of the effects of ozone elevation on rice quality is needed.
Rice destoner is a processing technique for removing stones and broken grains from a batch of milled rice. This research was carried out to modify an existing rice destoner for the purpose of increasing its capacity and efficiency. Modification introduced addressed challenges associated with the existing machine, such as low stone removal efficiency and low air flow channel, which affects the aerodynamic lifting of the rice grains. Performance was evaluated for 3 kg of locally milled rice samples based on the design capacity of the machine, cleaning efficiency and degree of grain flow. The result showed that the design capacity (1.8 kg/h) of the modified destoner was higher than that of the existing (0.86 kg/h). Also, the modified machine has 40.8% destoning efficiency which is higher than that of existing machine (2.58%).
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