Nitrate Zinc Step Logic

Resolve the nitrate reduction confirmation sequence from initial reagent and zinc observations, without organism identification.

Description

Nitrate reduction confirmation distinguishes an initially positive nitrite reaction from a negative reaction requiring the supplied zinc step.

Nitrate reduction confirmation distinguishes an initially positive nitrite reaction from a negative reaction requiring the supplied zinc step. Zinc-stage red and no-red outcomes have different evidence meanings.^[1]

Resolve the nitrate reduction confirmation sequence from initial reagent and zinc observations, without organism identification.

When to use Nitrate Zinc Step Logic

Use this tool to resolve the nitrate reduction confirmation sequence from initial reagent and zinc observations, without organism identification.

Prepare the sample, count, growth or assay measurements requested by this tool. Confirm units, sampling periods and reporting bases; supply independently established comparison criteria where requested.

How to use Nitrate Zinc Step Logic and understand its results

Prepare the sample, count, growth or assay measurements requested by this tool. Confirm units, sampling periods and reporting bases; supply independently established comparison criteria where requested.
Enter initialRed, zincResult using the field table and calculation rules, then run the tool.
Read nitrateReductionPositive, evidence. 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
initialRed	Initial red	boolean	Required
zincResult	Zinc result	string	Required

Enter initialRed and zincResult as not-performed, red or no-red. Initial red requires zinc not-performed; initial no-red requires a performed zinc result. The decoder returns positive with nitrite-detected evidence for initial red, negative with unreduced-nitrate-confirmed for zinc red, or positive with reduction-beyond-nitrite for zinc no-red.

positive = initialRed OR zincResult=no-red

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

Output field	Meaning	Value type
nitrateReductionPositive	Nitrate reduction positive	boolean
evidence	Evidence	string

json

{
  "input": {
    "initialRed": false,
    "zincResult": "no-red"
  },
  "output": {
    "nitrateReductionPositive": true,
    "evidence": "reduction-beyond-nitrite"
  }
}

Limitations and assumptions

This interprets a declared observation sequence without running an assay or identifying an organism. Controls, timing and alternative sources of an unreadable result are not evaluated.

Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Extremely large text inputs are rejected. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors. A successfully returned false flag is an evaluated outcome; its meaning is explained above.

Alternative or Complementary methods

Use SIM Masked Indole Motility: Decode SIM observations while preserving sulfide-masked motility as unreadable rather than falsely negative. For a complementary task, use Of Open Sealed Reaction: Decode paired open/sealed oxidative-fermentative observations while separating no-growth and discordant cases.

References

Nitrate Zinc Step Logic — tool.io

Similar or alternative tools

SIM Masked Indole Motility
Decode SIM observations while preserving sulfide-masked motility as unreadable rather than falsely negative.
Of Open Sealed Reaction
Decode paired open/sealed oxidative-fermentative observations while separating no-growth and discordant cases.