cholesterol

Structure-supported identity

Record the claimed identity, its supporting evidence and whether relevant sterol alternatives were resolved.

1. What evidence establishes the cholesterol structure, including its stereochemistry, rather than only a compatible formula or sterol class? definition
2. Which reference material, analytical record or supplier record supports this identity claim? provenance

Free cholesterol versus derived forms

Record whether cholesterol denotes the unesterified substance, a cholesterol contribution within esters or an assay-defined total.

1. Does this record refer to free cholesterol, esterified cholesterol contributions or total cholesterol? definition
2. Which esters or oxidation products require linked substance records rather than being counted as intact free cholesterol? boundary

Phase and dispersion

Record whether cholesterol is solid, dissolved, dispersed or incorporated into an organised lipid environment.

1. Is cholesterol present as a solid, in solution, in a dispersion or associated with a membrane or particle? measurement
2. What solvent, temperature and preparation history support that state, and is precipitation or phase separation evident? provenance

Intact cholesterol fraction

Record purity evidence and any detected or suspected conversion to other chemical species.

1. What fraction of the material is intact cholesterol, and does the method distinguish relevant impurities or oxidation products? measurement
2. What storage or exposure history could affect integrity, and what evidence confirms or leaves that effect unresolved? provenance

Declared cholesterol basis

Bind each quantity to a free, esterified or total basis and a specified sample denominator.

1. What cholesterol quantity is reported, in which units, and relative to what sample volume, mass or amount? measurement
2. If esters contribute, is the result expressed as cholesterol equivalents or as the mass of whole ester molecules? definition

Method-qualified result

Record sample preparation, assay selectivity, calibration and uncertainty sufficient to assess the result.

1. How was cholesterol measured, and did preparation include extraction, ester hydrolysis or fraction separation? provenance
2. What uncertainty, recovery limitations or interferences constrain comparison with another cholesterol result? measurement

Located cholesterol population

Record the sample, compartment or material population represented by the cholesterol observation.

1. Which material, specimen or biological compartment contains the cholesterol being described? definition
2. Was that location directly sampled, experimentally separated or inferred from a broader measurement? provenance

Fraction-associated cholesterol

Distinguish cholesterol content attributed to a fraction from properties of the particles or membranes themselves.

1. If the observation is labelled LDL cholesterol or HDL cholesterol, how was the fraction association measured or calculated? measurement
2. Which conclusions concern cholesterol content, and which require a separate lipoprotein, membrane or patient model? boundary

Operation with a defined target

Record the target chemical form and material state for dissolution, extraction, separation or incorporation.

1. What documented procedure supports the intended cholesterol preparation in this matrix and at this scale? action
2. Will the operation preserve free cholesterol, release cholesterol from esters or otherwise change the analyte basis? boundary

Evidence-based use disposition

Connect documented storage requirements, current integrity evidence and intended use to a handling decision.

1. Which storage and handling conditions apply to this specific cholesterol preparation according to its documentation? provenance
2. Does the available identity, purity and integrity evidence support use, or is reanalysis or replacement needed? action

Kinds and varieties

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these kinds and varieties hold for the sense of cholesterol this model covers, and on what evidence? provenance

Identifiers and schemes

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these identifiers and schemes hold for the sense of cholesterol this model covers, and on what evidence? provenance

Standards and regulation

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these standards and regulation hold for the sense of cholesterol this model covers, and on what evidence? provenance

Real-world use

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these real-world use hold for the sense of cholesterol this model covers, and on what evidence? provenance

Typical measurements

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these typical measurements hold for the sense of cholesterol this model covers, and on what evidence? provenance

Failure modes and hazards

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these failure modes and hazards hold for the sense of cholesterol this model covers, and on what evidence? provenance

Regional variation

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these regional variation hold for the sense of cholesterol this model covers, and on what evidence? provenance

Neighbouring kinds and how to tell them apart

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these neighbouring kinds and how to tell them apart hold for the sense of cholesterol this model covers, and on what evidence? provenance