Consider a Refracting Telescope for Star Gazing
Whether you are a beginner or old pro at scanning the stars and planets, you are probably aware that there are different types of telescopes used for star gazing. If you aren’t familiar with the more popular telescopes, it is the refracting and reflecting telescopes that represent the two basic types of telescopes used by today’s neophyte and professional astronomers. Of these two telescopes, the refracting telescope has the longest history and has been in use for centuries. The refracting telescope dates back to the 15th century and continues to be a very commonly used telescope in the 21st century. The truth be known, the refracting telescope is one of the oldest telescope designs still in use by today’s astronomers.
RT-PCR
Reverse transcription-polymerase chain reaction (RT-PCR) is generally applied in analysing HIV, since HIV is classed as a retrovirus & uses the enzyme HIV-Reverse Transcriptase to synthesise viral deoxyribonucleic acid to be contained into host genome. RT-PCR is a speedy and highly sensitive method for analyzing gene expression, for deciding the presence or absence of copies and for producing cDNA for cloning.