Dextrose Information and Courses from MediaLab, Inc.
These are the MediaLab courses that cover Dextrose and links to relevant pages within the course.
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| Which of the following is not a common support medium used in electrophoresis techniques: | View Page |
| Match the organism on the right with the most suitable culture media on the left: | View Page |
| Specimen Collection and Handling Some global specimen collection and handling issues to consider include: Specimens that contain nucleated cells will be of interest in DNA methodologies while specimens lacking nucleated cells are more useful in RNA methodologies. rRNA is more stable than mRNA, which is labile and sensitive to contamination. DNA is relatively stable and can be obtained from nonviable sources. Serum or plasma obtained by standard routine venipuncture procedures can be used as long as proper site selection and decontamination occur. Standard anticoagulants such as Ethylenediaminetetraacetic Acid (EDTA) and Acid Citrate Dextrose (ACD) can be used; however avoid the use of heparin as an anticoagulant as it interferes with some polymerase chain reaction (PCR) methodologies. When using fluorescence, fasting serum or whole blood specimens should be used to decrease the interference by lipids. | View Page |
| When collecting blood samples, one anticoagulant to avoid, especially when performing PCR is: | View Page |
| The colonies shown in the upper image, obtained from a biopsy of an ulcerating skin lesion of the arm, are growing on agar slants of Sabouraud's dextrose agar. The lower image is a photomicrograph of a lactophenol blue mount made from a portion of the colony growing in the left slant. The diagnosis is: | View Page |
| Illustrated in this photomicrograph of a lactophenol blue preparation of a urine sediment is a cluster of yeast cells that were presumptively identified as Cryptococcus species. Further characteristics that may assist in confirming this identification are: | View Page |
| Yellow top tubes Contain either acid citrate dextrose (ACD), which maintains RBC viability and may be used for HLA phenotyping, DNA, paternity testing, or lymphocyte surface markers, or:
Sodium polyanetholesulfonate (SPS) which is sometimes used to collect blood culture specimens.
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