biological indicator


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biological indicator

any organism which can be used to characterize particular environmental properties, e.g. pollution, oxygenation. For example, crustose lichens, such as Leconora coneyaeoides, are tolerant of pollution, whereas fructuose lichens, such as Usnea sp., are very sensitive to atmospheric pollution and are found only in areas where pollution is slight.
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Advanced Sterilization Products (ASP) reported on Wednesday the receipt of US FDA clearance for its 30-minute STERRAD VELOCITY Biological Indicator (BI) System.
aeruginosa) Colony NG NG suspension in saline Contaminated NG NG materials Chemical U WU indicator (Inside bag) Biological indicator Results from different waste positions and packaging formats Tests L WL Culture on G(2/5, B.
Biological indicators are used to assess the effectiveness of sterilisation processes, including steam, gas (such as Ethylene Oxide or Chlorine Dioxide), hydrogen peroxide and radiation, in the hospital, dental, medical device and pharmaceutical industries.
He is a member of the Association for the Advancement of Medical Instrumentation (AAMI) working groups for industrial ethylene oxide sterilization, biological indicators, process challenge devices (PCD), sterilization residuals, packaging, and resistometers.
As has been presented, most of the literature on soil quality in recent years recommends biological indicators to assess soil quality in place of chemical or physical indicators, based on the assumption that biological indicators respond to physical and chemical changes in soil.
Biological indicators of aquatic ecosystems stress.
A comparison of three indices of water quality (chemical, zoological and botanical assessment using diatoms) concluded that the latter gave the most precise data (Leclercq and Maquet, 1987) though in some cases, aquatic macroinvertebrates have been demonstrated to be superior to diatoms as biological indicators, with a capacity to reflect on sedimentation in the river bed that cannot be reflected by diatoms (Schoeman and Haworth, 1986; Katoh, 1992; Prygiel and Coste, 1993).
Bulgaria's Environment and Water Agency has funded a project for the research of penguin plumage - also an excellent biological indicator.
Therefore, they are used as a biological indicator that other microorganisms have also been killed (Figure 1).
Mussels were chosen for a biological indicator because of the mussel's close proximity with stream substrate during their lifetime.
ProTest Steam is a self-contained biological indicator inoculated with viable Geobacillus stearothermophilus bacterial spore, and is intended for monitoring the efficacy of steam sterilization cycles (121[degrees]C gravity displacement and 121[degrees]C to 135[degrees]C pre-vacuum cycles).
Observing the presence of a biological indicator within an ecosystem is one such method.

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