Starch Hydrolysis: In many tests it is acceptable to read a positive result before the inoculation time is completed. Why is this not the case with Starch Agar?
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Starch Hydrolysis: In many tests it is acceptable to read a positive result before the inoculation time is completed. Why is this not the case with Starch Agar?
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- FOOD MICROSCOPY: STARCH IDENTIFICATION The following figures are the photomicrographs of the samples taken with Kern&Sohn Camera Microscope at 10x magnification. Samples were stained with Lugols solution for better viewing. Differentiate these two photos belowIn an epoxidation lab, why is it important to continue stirring vigorously in order to get a good yield?Which of the following statements regarding boiling is FALSE? Question options: all of these statements are TRUE autoclaves routinely use temperatures notably higher than the normal boiling point of water at higher elevations, boiling times need to be increased to achieve the same degree of microbial control boiling kills cells mainly by the destruction of their DNA boiling water for ten minutes is effective in killing many microorganisms bacterial endospores are not reliably killed by boiling
- Provide the conditions (e.g., intrinsic properties, storage conditions, etc.) that will make the recovery of the following microorganisms in commercially sterile foods acceptable: a) Obligate thermophilic sporeforming bacteria b) Acid-tolerant microorganisms c) Mesophilic or thermophilic sporeformersWhy it is possible/ applicable to use recrystallization and vacuum filtration with Luminol? Cite some reasons.(Explain in at least 1 paragraph)The optimum growth pH for a microorganism is usually: 4,5,7 or 8
- CITRATE UTILIZATION TEST WAS PERFORMED IN A CULTURE MEDIA WHICH CONTAIN A STRONG BUFFER. AND EVEN A SURE POSITIVE ORGANISM GET A NEGATIVE RESULT. WHY?Need help Can a pure culture be prepared from a mixed culture in a broth or plate? Explain.What is the EFFECT and RATIONAL of Molten agar mixed with bacterial suspension has temperature higher than 45 oC.
- how do microorganisms such as bacteria eliminate harmful reactive oxygen species? Nitrate reduction to nitrite is indicated by the formation of a pink to red colour after addition of nitrate test reagent. However, if a culture does not produce a colour change several posibilies exist. Explain.A positive lipid hydrolysis test is indicated by the growth of bacteria on the medium. A positive lipid hydrolysis test is indicated by the growth of bacteria on the medium. True FalseYou are given reference temperature 121 °C, Z value 10 °C, F0 15 min for killing Clostridium botulinum in commercial sterilization. Calculate F value when sterilized at 131 °C in canning processing.