IMPORTANT POINTS The following key points are discussed: • Quality control microbiology tests require controlled levels of inocula and require fresh preparations of cells for those inocula • The concentration of cells in a suspension can be estimated by optical density, but this must be confirmed by plate count • The optical density readings against cell mass are specific to the microorganism s...

Microbial enzymes are often more useful than enzymes derived from plants or animals because of are more stable than their corresponding plant and animal enzymes and their production is more convenient and safer (Wiseman, 1987). Only about 2% of the world’s microorganisms have been tested as enzyme sources. Microbial proteases are degradative enzymes, which catalyze the total hydrolysis of prote...

There are significant challenges associated with qualitative and quantitative nucleic acid tests performed in diagnostic laboratories. The development of internationally available certified reference materials which can be traced to reference measurements will contribute to a better understanding of the performance characteristics of nucleic acid tests and enhance reliability and comparability ...

there are significant challenges associated with qualitative and quantitative nucleic acid tests performed in diagnostic laboratories. the development of internationally available certified reference materials which can be traced to reference measurements will contribute to a better understanding of the performance characteristics of nucleic acid tests and enhance reliability and comparability ...

pathology laboratory. The chapter is well written and most of the pitfalls encountered by beginners in this procedure are discussed in detail. Part 3 describes 18 examples of preparing various tissues, bacteria, etc., for microscopic examination, using the staining methods outlined in Chapter 7. Numerous photomicrographs illustrate the desired results. Part 4, a new addition, lists specific sou...

background : collection and storage of roof rain water have been practiced for long time ago in iran and many other countries. water of cisterns is usually used as potable water. in golestan province many of rural torkman residents reservoir the most part of their potable water from roof rain in cisterns. in this province there are over 2600 cisterns. methods : to study the water quality, micro...

objective: infection control is one of the important aspects in dentistry. oral and maxillofacial surgery is one of the most sensitive fields in dentistry in which infection control is important a sterile surgical set is imperative. manufacturers only guarantee the sterility of the anesthetic not the sterility of its outer surface. they recommend alcohol to sterile the outer surface (especially...

genetic modifications in time. Goethe's true position, the writer of this review feels, might have been recognized more clearly if in the controversy the personal element in Goethe's character had not been neglected unduly. The wholeness of Goethe's personality, so averse to an exclusively centrifugal mode of living, but so wholly given to a combination of highhearted neo-classic idealism and r...

THIS book may help to inform medical students and practitioners, whose knowledge of bacteriology is of necessity restricted in breadth as well as in depth, with the general aspects of the wider, but cognate, science now fashionably recognised as microbiology. This science assimilates what is still known as bacteriology, and invades the territory of the botanist and zoologist. It considers not o...