Methylphenidate has been studied and researched for over 50 years and has a very good efficacy and safety record for the treatment of ADHD. The original patent was owned by CIBA, now Novartis Corporation.
Sun-Earth Solar Panels using monocrystalline cells. The typical monocrystalline solar cell is a dark black colour, and the corners of cells are usually missing as a result of the production process and the physical nature of monocrystalline silicon.lthough quality technology is important in selection of solar panels, it is also critical to keep in mind that both monocrystalline and polycrystalline silicon solar cells are proven technologies, and one should not automatically be considered better than the other.
Some panels have been known to still be more than 80% efficient by the end of their life. With care and attention, solar panels could potentially last over forty years after installation, although their performance will have deteriorated marginally over that time. The 40-50 year life expectancy goes for both monocrystalline and polycrystalline solar panels. Less is known about the lifespan of thin film panels at the moment but, as they also have 25 year warranties as standard, they are expected to match the long life of crystalline panels.