I donât like the look of my pterygium. If there is no recurrence, it is highly likely that within 6 months after the surgery, you will probably not be able to tell which eye has had surgery.
A methyl group is an alkyl derived from methane, containing one carbon atom bonded to three hydrogen atoms â CH 3. The group is often abbreviated Me.Such hydrocarbon groups occur in many organic compounds. It is a very stable group in most molecules. methyl group is an alkyl derived from methane, containing one carbon atom bonded to three hydrogen atoms â CH 3. The group is often abbreviated Me.
The first two are classified as 1Âº-amines, since only one alkyl group is bonded to the nitrogen; however, the alkyl group is primary in the first example and tertiary in the second. The third and fourth compounds in the row are 2Âº and 3Âº-amines respectively.A nitrogen bonded to four alkyl groups will necessarily be positively charged, and is called a 4Âº-ammonium cation. For example, (CH 3) 4 N (+) Br (â) is tetramethylammonium bromide.he third and fourth compounds in the row are 2Âº and 3Âº-amines respectively. A nitrogen bonded to four alkyl groups will necessarily be positively charged, and is called a 4Âº-ammonium cation. For example, (CH 3) 4 N (+) Br (â) is tetramethylammonium bromide.