Lipid Biomarker Hopane Sterane Presence Ratio Classifier
Actual matched analytical hopane/sterane signal ratio relative to independent reference, not compound identification or biogenicity. Response factors, contamination, diagenesis and provenance remain external.
Description
Hopane-to-sterane signals depend on analytical method and alteration history.
Hopane-to-sterane signals depend on analytical method and alteration history.1
A ratio boundary is a caller-selected comparison rather than a definitive source classification. Use this tool to calculate the stated observation or conditional model from supplied measurements.
When to use Lipid Biomarker Hopane Sterane Presence Ratio Classifier
Use this tool to calculate the stated observation or conditional model from supplied measurements. Establish the observation or experimental context, reference/calibration source, unit basis and adopted model assumptions.
How to use Lipid Biomarker Hopane Sterane Presence Ratio Classifier and understand its results
- Establish the observation or experimental context, reference/calibration source, unit basis and adopted model assumptions.
- Enter independentlyMeasuredHopaneSignal, independentlyMeasuredSteraneSignal, callerReferenceRatioBoundary, using the field meanings and rules below, then run the tool.
- Read result.observedHopaneSteraneRatio, result.aboveCallerRatioBoundary. Interpret each field using the units, signs and evidence rules below.
- If input validation fails, correct the reported field and run again. Before applying a successful result, check the stated reference scope, units, assumptions and any retained unknown evidence.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| independentlyMeasuredHopaneSignal | Independently measured hopane signal | number | Required |
| independentlyMeasuredSteraneSignal | Independently measured sterane signal | number | Required |
| callerReferenceRatioBoundary | Caller reference ratio boundary | number | Required |
Require nonnegative hopane signal, positive sterane signal and nonnegative caller ratio boundary. Divide signals and flag ratio>boundary strictly. No calibration, alteration correction or source assignment is supplied.
hopaneSteraneRatio=hopaneSignal/steraneSignal; aboveBoundary=(ratio>callerBoundary) Apply the field units and exact ordering, boundary and evidence rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Structured result containing the calculation or selected reference fields below | object |
| result.observedHopaneSteraneRatio | Observed Hopane Sterane Ratio; use the units, sign convention and calculation stated above | number |
| result.aboveCallerRatioBoundary | Above Caller Ratio Boundary; use the units, sign convention and calculation stated above | boolean |
{
"input": {
"independentlyMeasuredHopaneSignal": 2,
"independentlyMeasuredSteraneSignal": 1,
"callerReferenceRatioBoundary": 1
},
"output": {
"result": {
"observedHopaneSteraneRatio": 2,
"aboveCallerRatioBoundary": true
}
}
}Limitations and assumptions
A ratio boundary is a caller-selected comparison rather than a definitive source classification. Results depend on the independently established measurement basis and the exact model assumptions above.
Every listed input requires an explicit value. Unexpected fields, incorrect value types, nonfinite numbers and sparse numeric arrays fail validation; tool-specific bounds and alignment rules apply as described above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful calculation that reports a false comparison or retains unknown evidence.
Alternative or Complementary methods
Use Carbon Isotope delta-13C Biological Fractionation Flag Checker to examine a related aspect: Carbon-isotope separation compares a sample delta with a specified abiotic reference.
Use ALH84001-like Magnetofossil Chain Alignment Morphology Flag where its separate inputs and scope apply: Magnetite chain alignment and morphology can inform magnetofossil interpretation.
References
Similar or alternative tools
- Carbon Isotope delta-13C Biological Fractionation Flag Checker
Carbon-isotope separation compares a sample delta with a specified abiotic reference.
- ALH84001-like Magnetofossil Chain Alignment Morphology Flag
Magnetite chain alignment and morphology can inform magnetofossil interpretation.