The presence of oxygen allows the cell to convert pyruvate into acetyl CoA, a coenzyme that can yield additional energy in the citric acid cycle. Pyruvate decarboxylation also converts two NAD+ molecules into two NADH and creates carbon dioxide as a byproduct.
Salary requirements can be included in your cover letter with sentences such as My salary requirement is negotiable based upon the job responsibilities and the total compensation package. or My salary requirement is in the $25,000 - $35,000+ range..any job postings ask you to include your salary history or your salary requirements when applying for the position. First of all, if the ad doesn't mention it, don't offer any salary information. If at all possible, you want the prospective employer to bring up the issue of compensation first.
Your cover letter should include an expression of your interest in knowing more about the job. At this stage in the process, you want an interview. Your cover letter shouldn't state that you want the job, because in many cases, that's premature and gives your cover letter a tone of desperation, which is counterproductive. You won't know whether you want the job until you have an interview.