The laboratory and clinical evaluation of a potassium nitrate-saturated disk for the rapid detection of nitrate reductase production in anaerobes was investigated. The optimal disk concentration and incubation time were determined by utilizing triplicate sets of quadrant plates prepared with supplemented brucella (Difco) blood agar and swabbed with a 24-h broth (BBL; 135 C thioglycolate) suspen...

A simple procedure for rapid identification of Clostridium botulinum type A and B colonies from cultures and stool samples from infants with botulism was devised. The stool samples were directly streaked on C. botulinum isolation medium containing selective inhibitory agents. Typical lipase-positive colonies that appeared within 24 to 48 h were examined for the presence of botulinal toxin by th...

The stock markets are well known for wide variations in prices over short and long terms. These fluctuations are due to a large number of deals produced by agents and act independently from each other. However, even in the middle of the apparently chaotic world, there are opportunities for making good predictions [ I ] . In this paper the Nikkei stock prices over 1500 days from July to Oct. 200...

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– We investigate the correlation properties of transaction data from the New York Stock Exchange. The trading activity fi(t) of each stock i displays a crossover from weaker to stronger correlations at time scales 60− 390 minutes. In both regimes, the Hurst exponent H depends logarithmically on the liquidity of the stock, measured by the mean traded value per minute. All multiscaling exponents ...

Hurst exponent (H) measured from R/S ratio, is being used as a measure to find predictability of a time series. The larger the H value, the stronger is the trending trait in the time series. In this paper, we estimated R/S ratio of several stock indexes of Indian market for 10 years. Though the overall Hurst exponent values for the selected series were close to 0.5, the value varied widely on p...