Base line, instability

Identified by retention time molecular weight determination by MC-2 was thwarted by instability in base line during first several minutes of operation of this instrument. 

As was pointed out, the most important drawback in the operation of AD processes is related to the instability of the process. However, this drawback can be overcome by associating monitoring procedures with decision support systems that allow the on-line stable operation of the process via a feedback control loop [27, 33]. Nowadays, most of the monitoring and control techniques available in the literature belong to those called model-based . Such... 

Network back propagation Generic combustion instability [15] Dump combustor [16] Boiler combustion systems [17] 2. Has similar algorithm in System ID 3. May be replaced by off-line ID plus Bode-Nyquist or observer-based controller... 

An implicit finite-difference procedure for solving the laminar boundary layer equations was discussed in this chapter. Discuss how these boundary layer equations could be solved using an explicit procedure. In such a procedure, the terms duldy and d1uldyl are evaluated on the (i - 1) line. The continuity equation is trea ed in the same way in both procedures. Write a computer program based on this procedure and show by numerical experimentation with this program that instability develops if ... 

EBV transformation is another widely used way for establishing cell lines for antibody production in the past.26,27 Cell lines transformed with EBV preferably produce IgM.28 Due to some instability of the cell lines, however, hybridoma technology based on cell fusion is preferred. 

Unfortunately, research work on taxines was hampered by their instability and the loss of activity upon storage because of the loss of dimethylamino moiety from the C-3 atom (Fig. 1) and the formation of corresponding cinnamates. Isolation of taxines is accomplished by alka-line/base extraction but it is difficult to obtain them in a purified form because of rapid acetate isomerization and/ or decomposition to taxinines. To the author s knowledge, there are no taxine/taxinine reference compounds commercially available. It is no surprise therefore that there are limited works that report on the high-performance liquid chromatography (HPLC) of taxines. Taxines were found in plant extracts interfering in extraction, isolation, and analysis of paclitaxel from plant material. ... 

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