Component
Net ammonia generation in human fecal cultures
Net ammonia generation in human fecal cultures. Species, exposure and limitations are retained in each linked claim.
1 recorded relationships. Experimental role, claim status and evidence remain attached to each record.
How nutrients influence it
Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.
Other things that act on it
Enzymes, hormones, genes, and other components with a recorded effect. These are not nutrients, so they do not count toward the arrows above. Each finding names the chapter that recorded it.
How nutrients reach it in more than one step
Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.
Tracing routes…
What it does
Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.
What acts on it
Pectin significantly reduced net ammonia generation in incubations after subjects had been pre-fed pectin; the reduction without pre-feeding was not significant.
Experimental context and source evidence
- evidence_span
- {"source_cache": "artifacts/pectin-research/2317475.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "86aae760cc52aeca6f270420e20dabaffa8167770fa30c7fa8e35b1f67b7d9b4", "start_char": 0, "end_char": 1642, "text_sha256": "86aae760cc52aeca6f270420e20dabaffa8167770fa30c7fa8e35b1f67b7d9b4"}
- experimental_model
- Anaerobic human fecal incubations before and after carbohydrate pre-feeding
- exposure
- Pectin and comparator carbohydrates; 48-hour incubations, up to two weeks of pre-feeding
- limitations
- Cultures lack intestinal absorption and host metabolism; results do not quantify systemic exposure.
- nutrient_topic
- Pectin research collection; topical membership is not evidence of a direct dietary effect. · Pectin, structurally heterogeneous plant polysaccharides
- organism
- Human fecal microbiota ex vivo
- plain_language
- Previous exposure changed the measured nitrogen-metabolism response.
- primary_references
- [pectin-p2317475] The effect of lactulose, pectin, arabinogalactan and cellulose on the production of organic acids and metabolism of ammonia by intestinal bacteria in a faecal incubation system. (1990). https://pubmed.ncbi.nlm.nih.gov/2317475/ DOI: 10.1079/bjn19900088
- tissue_or_cell_type
- Batch cultures
Pectin: metabolism, signaling and nutrient connections (2026-09-17) · lines 880–891
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Anaerobic human fecal incubations before and after carbohydrate pre-feeding · source_derived_draft · unverified_draft
### pectin-ammonia Pectin significantly reduced net ammonia generation in incubations after subjects had been pre-fed pectin; the reduction without pre-feeding was not significant. Condition category: normal nutrient_topic: Pectin research collection; topical membership is not evidence of a direct dietary effect. plain_language: Previous exposure changed the measured nitrogen-metabolism response. organism: Human fecal microbiota ex vivo tissue_or_cell_type: Batch cultures experimental_model: Anaerobic human fecal incubations before and after carbohydrate pre-feeding limitations: Cultures lack intestinal absorption and host metabolism; results do not quantify systemic exposure. exposure: Pectin and comparator carbohydrates; 48-hour incubations, up to two weeks of pre-feeding evidence_span: {"source_cache": "artifacts/pectin-research/2317475.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "86aae760cc52aeca6f270420e20dabaffa8167770fa30c7fa8e35b1f67b7d9b4", "start_char": 0, "end_char": 1642, "text_sha256": "86aae760cc52aeca6f270420e20dabaffa8167770fa30c7fa8e35b1f67b7d9b4"} [pectin-p2317475] The effect of lactulose, pectin, arabinogalactan and cellulose on the production of organic acids and metabolism of ammonia by intestinal bacteria in a faecal incubation system. (1990). https://pubmed.ncbi.nlm.nih.gov/2317475/ DOI: 10.1079/bjn19900088
Complete structured claim and evidence
The events it takes part in
A mechanism often involves more than two components. These are the full events, with every participant and its role.
Situations it appears in
Low-supply and faulty-machinery situations recorded in the chapters where this component plays a part.
In the sources
Preserved passages that mention this component, quoted exactly. Open one to read it in context.
Open hypotheses
Proposed ideas that involve this component. They are labeled as hypotheses and do not change any recorded statement.
This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.