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Media Advisory Two: AGU Fall Meeting
Media Advisory Two: AGU Fall Meeting
Media Advisory Two: AGU Fall Meeting
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(American Geophysical Union) All 1,193 sessions and 15,730 abstracts for the 2008 Fall Meeting have been posted on the AGU Web site.
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Other Articles:
| • | Isolation, Characterization and Growth Response of Pesticides Degrading Bacteria |
| In Pakistan, insecticides are widely used in agriculture. Despite their biodegradable nature, some are highly toxic and their residues are found in the environment. Moreover, its removal from wastewater generated during manufacture becomes inevitable. Reports on the mineralization of a spectrum of different insecticides by a single potential strain are scarce. In this study, a bacterial strain was isolated from soil using enrichment technique and identified as Pseudomonas sp. by microscopic examination and biochemical tests. Growth curve experiments showed that Pseudomonas strain was able to grow in nutrient medium containing malathion (35-220 mg L-1), methamidophos (80-320 mg L-1), cartap (60-120 mg L-1) and cypermethrin (40-125 mg L-1) pesticide. However, the optimum concentration which support normal bacterial growth during 24 h was found to be 120 mg L-1 malathion, 160 mg L-1 methamidophos, 80 mg L-1 cartap and 60 mg L-1cypermethrin. When compared with the control test, a significant increased in bacterial population was noted at low concentration of each pesticide, however at high concentration lag phase increased but no zone of inhibition observed. These data indicate that the isolated Pseudomonas strain can be used as a microorganism for the bioremediation of pesticide contaminated soil or water. | |
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| • | Extracting key information from historical data to quantify the transmission dynamics of smallpox |
| Background: Quantification of the transmission dynamics of smallpox is crucial for optimizing intervention strategies in the event of a bioterrorist attack. This article reviews basic methods and findings in mathematical and statistical studies of smallpox which estimate key transmission parameters from historical data.Main findingsFirst, critically important aspects in extracting key information from historical data are briefly summarized. We mention different sources of heterogeneity and potential pitfalls in utilizing historical records. Second, we discuss how smallpox spreads in the absence of interventions and how the optimal timing of quarantine and isolation measures can be determined. Case studies demonstrate the following. (1) The upper confidence limit of the 99th percentile of the incubation period is 22.2 days, suggesting that quarantine should last 23 days. (2) The highest frequency (61.8%) of secondary transmissions occurs 3?5 days after onset of fever so that infected individuals should be isolated before the appearance of rash. (3) The U-shaped age-specific case fatality implies a vulnerability of infants and elderly among non-immune individuals. Estimates of the transmission potential are subsequently reviewed, followed by an assessment of vaccination effects and of the expected effectiveness of interventions. Conclusion: Current debates on bio-terrorism preparedness indicate that public health decision making must account for the complex interplay and balance between vaccination strategies and other public health measures (e.g. case isolation and contact tracing) taking into account the frequency of adverse events to vaccination. In this review, we summarize what has already been clarified and point out needs to analyze previous smallpox outbreaks systematically. | |
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| • | Queen's University Belfast: Research Fellow |
| Research Fellow, Queen's University Belfast, Belfast, United Kingdom. Posted on 25 July 2007. | |
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| • | [LETTERS] Reply: |
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| • | digitalfotoclub.com - Compare digital cameras at Digital Foto Club - Home and portable electronics, appliances, housewares and more |
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| • | Optical microscope - Wikipedia, the free encyclopedia |
| The optical microscope, often referred to as the "light microscope", is a type of microscope which uses visible light and a system of lenses to magnify images of small samples. | |
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EurekAlert! - Policy and Ethics
By editor@weddingssitereviews.com - Copyright 2008 by the American Association for the Advancement of Science - version: v1.5 build A
By editor@weddingssitereviews.com - Copyright 2008 by the American Association for the Advancement of Science - version: v1.5 build A