Limited capability and political will have caused the great powers to fail to demonstrate their global leadership in the fight against the COVID-19 pandemic, which has created greater room to manoeuvre for other countries to influence international affairs.Preliminary achievements in the fight against the COVID-19 crisis have buttressed the rising
The South African transport sector is estimated to emit 60 MtCO2eq and require 800 Bike Parts - Tires - 27.5" PJ of energy, similar in scale to industrial energy demand and emissions.The sector is forecast to potentially eclipse industry in this regard if conventional vehicle choices and travel modes persist.This paper explores scenarios of transpo
The ultraviolet multi-filter rotating shadow-band radiometer (UV-MFRSR) is a seven-channel radiometer with narrowband filters centered between wavelengths 300 and 368 nm.Four of the middle wavelengths in this device are near Receivers those used in the Dobson spectrometer to retrieve ozone column abundance.In this paper measurements from Mauna Loa
Abstract The medical application of chitosan (Cs) has been for about half a century, but the molecular mechanism has not been elucidated yet.This study is to explore the antibacterial mechanism of chitosan nanoparticles (Csnp) Generators in dentin at the atomic resolution level.Extracted tooth specimen was prepared in three groups: A.control group;