Analysis microbiological

A typical microbiological analysis in a troubled carbon-steel service water system is given in Table 6.2. Table 6.3 shows a similar analysis for a cupronickel utility main condenser that showed no significant corrosion associated with sulfate reducers. When biological counts of sulfate reducers in solid materials scraped from corroded surfaces are more than about 10, significant attack is possible. Counts above 10 are common only in severely attacked systems. 

TABLE 6.2 Typical Microbiological Analysis In a Service Water System Pipe Experiencing Microbiologically Influenced Corrosion ... 

TABLE 6.3 Typical Microbiological Analysis at Outlet A Main Condenser Suffering No Significant Corrosion by Sulfate-Reducing Bacteria ... 

Clostridia frequently are found where sulfate-reducing bacteria are present, often in high numbers inside tubercles. A typical microbiological analysis of tubercular material removed from a troubled service water system main is given in Table 6.4. Clostridia counts above 10 /g of material are high enough to cause concern. When acid producers... 

TABLE 6.4 Typical Microbiological Analysis of Tubercular Material Containing High Concentrations of Clostridia ... 

Microbiological analysis of material removed from corroded areas showed high aerobic and relatively high anaerobic counts (Table 6.7). Fungi counts were also elevated, indicating relatively high die-off of aerobic bacteria that is, the coolant was approaching its useful life. 

Specifics on the types and rates of microbiological attack. These must be determined by using other methods such as chemical and microbiological analysis of the solution and materials from the corrosion sites. Consideration must be given to limitations of electrochemical techniques for MIC studies, noted previously under Corrosion Testing Laboratory Tests and subsequent subsections. 

Elkan and Horvath170 performed a microbiological analysis of samples taken from the north and south deep monitoring wells in December 1974, about 6 months after the dilute waste front had reached the south well. Both denitrifying and methanogenic bacteria were observed. The lower numbers and species diversity of organisms observed in the south monitoring well compared with those in the north well indicated suppression of microbial activity by the dilute wastes. 

In patients with clinical signs and symptoms of (severe) sepsis the diagnosis is based on microbiological analysis of blood and material from the original site of infection and, if present, on signs and... 

Problems related to microorganisms, sediment and water in fuels and fuel systems can develop for a variety of reasons. TABLE 4-10 describes a typical microbiological analysis in a service water system. Sources include ... 

Naumann, D., Helm, D., Labischinski, H. and Giesbrecht, P. (1991) The characterization of microorganisms by Fourier-transform infrared spectroscopy (FT-IR) n Modern techniques for rapid microbiological analysis, edited by W.H.Nelson, pp. 43-96. New York VCH Publishers. 

Deliver the sample to the laboratory as fast as possible the maximum time is 2 hours. After that, the sample will be unacceptable for microbiological analysis. 

MICROBIOLOGY ANALYSIS RECORD STERITEST MEMBRANE EILTRATION METHOD... 

Periodic (at least monthly) microbiological analysis. This is to ensure the total bacterial count is kept under control. If higher than normal levels of bacteria are detected, the frequency of testing should be increased to weekly until control has been established. 

When sampling water systems, special care should be taken to ensure that the sample is representative. Sampling ports should be sanitized and thoroughly flushed before a sample is taken. Samples for microbiological analysis should... 

Drinking water samples that are collected for microbiological analysis should not be contaminated with unrepresentative bacteria during sampling. The water flow... 

For microbiological analysis, collect samples of cold water keep them refrigerated for no longer than 30 hours prior to analysis. 

Andra, J., Howe, J., Garidel, P., Rossle, M., Richter, W., Leiva-Leon, J., Moriyon, I., Bartels, R., Gutsmann, T., Brandenburg, K. Mechanism of interaction of optimized Limulus-derived cyclic peptides with endotoxins thermodynamic, biophysical and microbiological analysis. Biochem J 406 (2007) 297-307. 

Have the staff responsible for placing the specimen in the transport vessel (i.e. specimens collected during a surgical procedure, cultures to be sent for microbiological analysis, tubes of blood, etc.) be the same individual who labels all materials generated for that case... 

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