SCFA Composition
Calculate acetate–propionate–butyrate molar percentages.
Description
SCFA composition expresses acetate, propionate and butyrate relative to their combined amount.
SCFA composition expresses acetate, propionate and butyrate relative to their combined amount. Percentages require a consistent molar basis.1
Calculate acetate–propionate–butyrate molar percentages.
When to use SCFA Composition
Use this tool to calculate acetate–propionate–butyrate molar percentages.
Prepare the measured profile, formula counts, upstream model outputs or caller-defined reference criteria requested. Keep paired entries aligned and units, sample basis and preprocessing consistent.
How to use SCFA Composition and understand its results
- Prepare the measured profile, formula counts, upstream model outputs or caller-defined reference criteria requested. Keep paired entries aligned and units, sample basis and preprocessing consistent.
- Enter acetate, propionate, butyrate using the field table and calculation rules, then run the tool.
- Read total, molePercents, dominantAcid. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| acetate | Acetate | number | Required |
| propionate | Propionate | number | Required |
| butyrate | Butyrate | number | Required |
Enter nonnegative amounts with positive total. Return total, percentages in acetate/propionate/butyrate order and dominant name; ties choose the first in that order.
molePercent_i=100 amount_i/(acetate+propionate+butyrate) Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| total | Total | number |
| molePercents | Mole percents | list of number |
| dominantAcid | Dominant acid | string |
{
"input": {
"acetate": 2,
"propionate": 3,
"butyrate": 5
},
"output": {
"total": 10,
"molePercents": [
20,
30,
50
],
"dominantAcid": "butyrate"
}
}Limitations and assumptions
Other acids are excluded from the denominator. No concentration measurement, biological interpretation or uncertainty is supplied.
Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Sterol Conversion Progress: Summarize lanosterol and cholesterol fractions as a conversion proxy, not flux. For a complementary task, use Eicosanoid Branch: Compare caller-assigned COX and LOX eicosanoid branch signals.
References
-
SCFA Composition — tool.io
Similar or alternative tools
- Sterol Conversion Progress
Summarize lanosterol and cholesterol fractions as a conversion proxy, not flux.
- Eicosanoid Branch
Compare caller-assigned COX and LOX eicosanoid branch signals.