What is PERIODIC EXPENSES? Expenses which take place on an irregular basis. Not recorded on a monthly basis. An example can be the payment of insurance premiums on a quarterly basis, maintenance costs of property, etc.
However, in some species, pheromone components with lower molecular weights are also found. Exam- ples of these are lps typographus, with 2-methyl-3- buten-2-ol (methylbutenol) (Bakke et al., 1977), L cembrae with 3-methyl-3-buten-l-ol (Stoakley et al., 1978), and Dendroctonus jeffreyi with 1- and 2-heptanol (Renwick and Pitman, 1979).
Dexmethylphenidate, sold under the trade names Focalin among others, is a central nervous system stimulant used in the treatment of attention deficit hyperactivity disorder and narcolepsy. It is in the phenethylamine and piperidine classes of medications. It is the active dextrorotatory enantiomer of methylphenidate.