• Enzyme
  • Ames test a strain of Salmonella typhimurium that lacks the enzyme necessary for histidine synthesis is cultured in the absence of histidine and in the presence of the suspected mutagen and certain enzymes known to activate procarcinogens. (thefreedictionary.com)
  • wherein
  • 2. A test apparatus according to claim 1, wherein a cap is provided to fit over the opening of said ball-release piece. (google.com)
  • 3. A test apparatus according to claim 1, wherein said receptacle tray has a series of wells arranged in rows parallel to each other. (google.com)
  • 4. A test apparatus according to claim 1, wherein said ball holder is a hollow tube with a closed second end. (google.com)
  • 5. A test apparatus according to claim 1, wherein said ball-release piece has a beveled open end with a series of nibs spaced along the inner circumferential edge of said beveled opening. (google.com)
  • 6. A test apparatus according to claim 5, wherein said ball-release piece has a flange portion arranged to fit snugly over one end of said ball holder. (google.com)
  • 7. A test apparatus according to claim 5 wherein said nibs of said ball-release piece are arranged to release one of said coated balls when said ball-release piece is pressed on its extended exterior surface at said opening. (google.com)
  • 8. A test apparatus according to claim 1 wherein said wells are hemispherical in shape. (google.com)
  • 9. A test apparatus according to claim 1 wherein said balls are polystyrene balls. (google.com)
  • 10. A test apparatus according to claim 1 wherein said wells are contoured to provide coverage of one of said coated balls with a minimum of a blood sample and to prevent the entrapment of air between said ball and the well. (google.com)
  • methods
  • Although there have been methods for determining the presence of antigenically active macromolecules such as intact viruses, virus capsids, subunits, bacteria, membranes, cell walls, hormones, etc., there has been a lack of a simple yet sensitive test method and apparatus for determining the presence of these materials. (google.com)
  • brucellosis
  • The effectiveness of Rose Bengal test (RBT) and fluorescence polarization assay (FPA) in diagnosing cattle brucellosis in endemic areas was assessed and RBT and FPA test agreement was compared (n = 319). (springer.com)
  • reagent
  • Saturation analysis relies upon progressive saturation by the test compound of a specific reagent. (google.co.uk)
  • known
  • While with the 14th General Hospital in Cairo, he investigated schistosomiasis (then known as bilharzia) and developed tests and treatments for the disease. (wikipedia.org)
  • basis
  • RCFs provided a cumulative record of resident and staff symptoms, testing, hospitalisation and deaths on a daily basis using electronic line lists.Information regarding hospital presentations was obtained from the New South Wales electronic medical records system (PowerChart). (health.gov.au)
  • positive
  • The test was positive in 88.9% of the children and 89.3% of the adults. (ajtmh.org)
  • The test is considered negative if the solution turns pink at this point and positive otherwise. (wikipedia.org)
  • virus
  • The virus is ubiquitous among swine throughout the world and is enzootic in most herds that have been tested. (wikipedia.org)
  • Results
  • Results on 303 cases tested for amebiasis with this method show that an amebic complement fixation test can be useful in intestinal amebiasis and in obscure cases in which no amebae can be detected in the stools. (ajtmh.org)
  • result
  • A logistic regression model was constructed to predict cattle test result in FPA using RBT as the main predictor and incorporating bio-data and animal history. (springer.com)