E-signal

Using on-line mass spectroscopy [65] carbon dioxide and formic acid were demonstrated as soluble products of methanol oxidation. The former gives the most intense MS signal according to the fact that it is the main product. There are two main problems to detect formic acid as such. In the presence of carbon dioxide most of the m/e signals of HCOOH overlap with signals of the major product. Besides this, in the presence of methanol, formic acid reacts to form the methyl ester ... 

Prasanna de Silva A, Gunaratne H.Q.N., Gunnlaugsson T., Huxley A.J.M., McCoy C.P., Rademacher J.T., Rice T.E., Signaling Recognition Events with Fluorescent Sensors and Switches, Chem. Rev. 1997 97 1515 (review). 

Walter, P. and lohnson, A. E. Signal sequence recognition and protein targeting to the endoplasmic reticulum membrane. Annu. Rev Cell. Biol. 10 87-119,1994. 

The system performs information processing when the information obtained in the output is different from the information fed in the input in at least one of its characteristics (i.e., signal type, frequency, or amphtude). 

NOEs are strongly distance dependent (r 6), i.e., signal enhancements fade if r > 3 A. This makes NOE experiments a valuable tool for probing internuclear distances within... 

The relation between the change in output m — m0 and input e signals accordingly is represented by... 

Limited sample clean-up could overload the analytical column, and residual matrix components can accumulate on the column after multiple injections. The residual matrix components can also solidify and deposit over a period of time in the LC-MS ionization source or vacuum interface, resulting in a decrease in ion transfer efficiency. The decrease in instrumentation performance (i. e., signal intensity) can be monitored by the signals of system-suitability samples dispersed within an analytical batch. The practice of replacing the pre-column in every run and scrubbing the analytical column periodically with a cleaning mobile phase will help to maintain instrument performance. 

The broad "type e" signal, whose contribution increases with increasing V content, shows NMR behavior that is consistent with the presence of bulk V Og (1) the wideline NMR pattern resembles that... 

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