research

A new study has shown that many of the complaints about the effects of coronavirus vaccines on periods were valid. Twenty-nine thousand people around the world were studied on a wide range of factors and compared with those who hadn’t been vaccinated. The results showed that people who received the vaccination experienced an average delay in getting their periods by 1 day compared with those who hadn’t been vaccinated. The study published in the British Medical Journal Tuesday reports on data from a popular period-tracking app called Natural Cycles, which includes women from around the world. Most of the participants were from North America, Britain, and Europe; researchers analyzed 14,936 cycles among those who received the vaccine and 4686 cycles among those who did not. Because users tracked their menstrual cycles every month on the app—which included information about contraceptive use and other factors—researchers were able to analyze three menstrual cycles before vaccination and at least one cycle after. They compared these results with four cycles in unvaccinated participants.

Cogeneration, the combined generation of heat and power, is an efficient method to reduce cost or to save energy and hence, reduces the pollution. A large number of thermal process industries have this option to install cogeneration system and sugar mill is one of them. In this work, energy and exergy analysis of a sugar mill running on cogeneration system, having back pressure turbine system, has been carried out. Based on the operational data received from the industry, the detailed analysis of the system has been performed. It was found that the output power and excess power of the plant increases with increase in the boiler pressure and therefore, increases the cogeneration efficiency. Also, it was noticed that when the back pressure increases, the turbine output and cogeneration efficiency decrease and, Heat to Power Ratio (HPR) spans over a range of 2.79 to 4.07. From the exergy analysis of the plant, it is observed that the boiler is the main component for exergy destruction. The energy analysis of bagasse fired boiler was carried out and the results showed that energy efficiency was high up to 84.5%. However, the second law efficiency gave 28.5% and irreversibility rate associated with the combustion chamber was 62.19 MW which accounts 55.09% of the total fuel exergy.