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If the tube with oil doesn't turn yellow, but the open tube does turn yellow, then the bacterium is oxidizing glucose. If the tube with mineral oil doesn't change, and the open tube turns blue, then the organism neither ferments, nor oxidizes glucose. Instead it oxidizes peptones, which liberates ammonia, turning the indicator blue.
When compiled, local indicators may be too diverse to provide a national result. Indicators also face other limitations and challenges, such as: Lack of reference levels, therefore it is unknown if trends in environmental change are strong or weak. Indicator measures can overlap, causing over estimation of single parameters.
Ecological indicator of ecosystem health (ecological processes) Health indicator, which is used to describe the health of a population; Honeyguides, also known as "indicator birds", a family of Old World tropical birds Indicator, a genus of birds in the honeyguide family; Indicator species, a species that defines a characteristic of an environment
A biological indicator is also the name given to a process for assessing the sterility of an environment through the use of resistant microorganism strains (e.g. Bacillus or Geobacillus). [5] Biological indicators can be described as the introduction of a highly resistant microorganisms to a given environment before sterilization , tests are ...
In biomedical contexts, a biomarker, or biological marker, is a measurable indicator of some biological state or condition. Biomarkers are often measured and evaluated using blood, urine, or soft tissues [1] to examine normal biological processes, pathogenic processes, or pharmacologic responses to a therapeutic intervention. [2]
In statistics and research design, an indicator is an observed value of a variable, or in other words "a sign of a presence or absence of the concept being studied". [1] Just like each color indicates in a traffic lights the change in the movement.
Indicator bacteria themselves may not be pathogenic but their presence in waste may indicate the presence of other pathogens. [1] Similar to how there are various types of indicator organisms, there are also various types of indicator bacteria. The most common indicators are total coliforms, fecal coliforms, E. coli, and enterococci. [2]
The goal of the indicator is to identify increased probability of a stock market crash. The rationale is that under "normal conditions" a substantial number of stocks may set either new annual highs or new annual lows, but not both at the same time. As a healthy market possesses a degree of uniformity, whether up or down, the simultaneous ...