Acidity Decline Malic Respiration Rate

Fit signed log-linear malic mass-pool and concentration decline separately from actual sample volume, retaining apparent increase; observational loss is not proof of respiration, dilution or metabolic mechanism.

Description

Malic-acid concentration may change because the mass pool or juice volume changes.

Malic-acid concentration may change because the mass pool or juice volume changes. Separate log trends help distinguish those observed quantities.

When to use Acidity Decline Malic Respiration Rate

Use this tool to fit signed log-linear malic mass-pool and concentration decline separately from actual sample volume, retaining apparent increase; observational loss is not proof of respiration, dilution or metabolic mechanism.

Prepare vineyard measurements, dates or block records for the intended growing period. Keep weights, counts and weather observations in the stated units.

How to use Acidity Decline Malic Respiration Rate and understand its results

Prepare vineyard measurements, dates or block records for the intended growing period. Keep weights, counts and weather observations in the stated units.
Enter observationDays, malicConcentrationsGramsPerLiter, sampleJuiceVolumesLiters using the field table and calculation rules, then run the tool.
Read observedMalicPoolMassesGrams, fittedApparentMalicPoolDecayPerDay, fittedConcentrationDecayPerDay. 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
observationDays	Observation days	list of number	Required
malicConcentrationsGramsPerLiter	Malic concentrations grams per liter	list of number	Required
sampleJuiceVolumesLiters	Sample juice volumes liters	list of number	Required

Align increasing days with positive concentrations and juice volumes. Fit log pool mass and log concentration independently. Preserve negative decay rates when observed quantities increase.^[1]

Paired lists must be nonempty and have equal lengths. Each sequence checked for increasing order must contain at least two strictly increasing values. The least-squares fit needs at least two aligned observations and a varying independent variable; a constant dependent variable has reported R² of 1.

malic pool grams = concentration × volume; apparent decay rate = −slope of ln(value) against days

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
observedMalicPoolMassesGrams	Observed malic pool masses grams	list of number
fittedApparentMalicPoolDecayPerDay	Fitted apparent malic pool decay per day	number
fittedConcentrationDecayPerDay	Fitted concentration decay per day	number

json

{
  "input": {
    "observationDays": [
      0,
      1,
      2
    ],
    "malicConcentrationsGramsPerLiter": [
      4,
      2,
      1
    ],
    "sampleJuiceVolumesLiters": [
      1,
      1,
      1
    ]
  },
  "output": {
    "observedMalicPoolMassesGrams": [
      4,
      2,
      1
    ],
    "fittedApparentMalicPoolDecayPerDay": 0.6931471805599453,
    "fittedConcentrationDecayPerDay": 0.6931471805599453
  }
}

Limitations and assumptions

Apparent loss does not establish respiration or another metabolic mechanism.

Numbers and computed results must be finite; overflow produces an error. Numeric lists are limited to 100,000 entries; the rules above may require smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Sugar Accumulation Brix Per Week: Track measured signed Brix changes on actual unequal sampling periods, retaining decreases; not sugar production mass, alcohol conversion or a harvest-ready prediction. For a complementary task, use Harvest Window Optimal Days Brix Range Finder: Find all piecewise-linear observed Brix-compatible intervals under caller range, retaining disconnected/reversed trajectories and boundaries; sugar compatibility alone is not optimal harvest, maturity, acid balance or validated future scheduling.

References

Acidity Decline Malic Respiration Rate — tool.io

Similar or alternative tools

Sugar Accumulation Brix Per Week
Track measured signed Brix changes on actual unequal sampling periods, retaining decreases; not sugar production mass, alcohol conversion or a harvest-ready prediction.
Harvest Window Optimal Days Brix Range Finder
Find all piecewise-linear observed Brix-compatible intervals under caller range, retaining disconnected/reversed trajectories and boundaries; sugar compatibility alone is not optimal harvest, maturity, acid balance or validated future scheduling.