Biomarker Analysis
Biomarker Analysis - Related Videos
08:28
An Overview of bGDGT Biomarker Analysis for Paleoclimatology
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2023
Source: Laboratory of Jeff Salacup - University of Massachusetts Amherst Throughout this series of videos, natural samples were extracted and purified in search of organic compounds, called biomarkers, that can relate information on climates and environments of the past. One of the samples analyzed was sediment. Sediments accumulate over geologic time in basins, depressions in the Earth into which sediment flows through the action of fluid (water or air), movement, and gravity. Two main types...
10:10
An Overview of Alkenone Biomarker Analysis for Paleothermometry
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2023
Source: Laboratory of Jeff Salacup - University of Massachusetts Amherst Throughout this series of videos, natural samples were extracted and purified in search of organic compounds, called biomarkers, that can relate information on climates and environments of the past. One of the samples analyzed was sediment. Sediments accumulate over geologic time in basins, depressions in the Earth into which sediment flows through the action of fluid (water or air), movement, and gravity. Two main types...
08:29
Biomarkers in an Animal Model for Revealing Neural, Hematologic, and Behavioral Correlates of PTSD
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Cited by 29 •
2012
We describe a rat model of post traumatic stress disorder (PTSD) that reveals the persistent alterations in neuroendocrine function and the delayed long-term, exaggerated fear response, characteristic of PTSD patients. The animal model and methods described here are useful for correlating biomarkers in brain nuclei, which are mechanistic but cannot be measured in patients, with biomarkers in peripheral white blood cells, which can.
07:24
Sonication Extraction of Lipid Biomarkers from Sediment
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2023
Source: Laboratory of Jeff Salacup - University of Massachusetts Amherst The material comprising the living "organic" share of any ecosystem (leaves, fungi, bark, tissue; Figure 1) differs fundamentally from the material of the non-living "inorganic" share (rocks and their constituent minerals, oxygen, water, metals). Organic material contains carbon linked to a series of other carbon and hydrogen molecules (Figure 2), which distinguishes it from inorganic material. Carbon's wide valency range...
08:04
Soxhlet Extraction of Lipid Biomarkers from Sediment
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2023
Source: Laboratory of Jeff Salacup - University of Massachusetts Amherst Every lab needs standards that track the performance, accuracy, and precision of its instruments over time to ensure a measurement made today is the same as a measurement made a year from now (Figure 1). Because standards must test the performance of instruments over a long period of time, large volumes of the standards are often required. Many chemical standards can be purchased from retail scientific companies, like...
FAQs
Researchers interpret a biomarker response by comparing it with an appropriate baseline rather than treating every biological change as evidence of contamination. The comparison shows whether molecular, biochemical, cellular, or physiological conditions differ from expected conditions. This makes the result more meaningful for identifying exposure or ecological stress and for judging possible effects on organism health.
Using molecular, biochemical, cellular, and physiological indicators provides complementary views of environmental stress. A change at one level may reveal an early biological effect, while responses at other levels can show whether that change is associated with broader organism health concerns. Considering several levels therefore supports a more complete interpretation than relying on a single indicator.
Chemical measurements identify contaminants or describe their presence, whereas biomarker responses show how organisms or biological systems are affected. Combining both types of evidence connects environmental conditions with biological consequences. Field data add further context, helping researchers interpret whether measured responses are consistent with pollution, ecological stress, or other conditions observed at the study site.
An assessment begins by examining biological indicators in organisms or environmental samples, then comparing the findings with suitable baseline conditions. Researchers can interpret the biological changes alongside chemical measurements and field observations. This workflow supports evaluation of pollution exposure, organism health, early biological effects, and the potential ecological significance of the observed responses.
Biomarker analysis can inform remediation when biological evidence is needed in addition to contaminant measurements. Results may indicate whether organisms are experiencing stress, whether effects appear before visible damage, and whether ecological risk requires attention. Used with chemical and field information, these findings help clarify environmental conditions relevant to selecting or evaluating remediation actions.
Biomarker results link environmental exposure with changes occurring within organisms, providing evidence about how contaminants may affect biological health. Early molecular, biochemical, cellular, or physiological responses can reveal effects that are not yet visibly apparent. Interpreted with field data, these findings help researchers assess ecological risk and understand potential consequences for affected ecosystems.