{ "model": { "rank": 11572, "code": "thing-q177604", "model_id": "vr.tr.alkylation", "name": "alkylation", "purpose": "Let an agent explain alkylation and methylation in chemistry and biology, relay major reactions and industrial uses from chemistry references, describe biological methylation and its role in epigenetics and disease, and distinguish alkylation from acylation and other reactions.", "family": "Thing Registry", "category": "Activities and processes", "status": "research-draft", "kind": "thing", "plane": "ACT", "domain": "ACT.PRC", "industry": "", "version": "", "url": "/models/thing/q177604/", "tier": 2, "score": 41, "payload": { "layer": "wikidata", "aliases": [ "methylation", "macromolecule methylation", "hypermethylation", "Blanc chloromethylation" ], "aliasCount": 4, "merged": 4, "knownIn": 41, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": null, "source": { "dataset": "wikidata", "item": "Q177604", "url": "https://www.wikidata.org/wiki/Q177604", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-13T04:06:09Z", "providers": [ "Claude" ], "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify", "pass": 2, "wave": 3, "engine": "claude" }, "metaModel": { "id": "THING-Q177604", "registryId": "vr.tr.alkylation", "name": "alkylation", "version": "0.2.0-wave.3", "entryKind": "thing", "family": "Thing Registry", "domain": [ "ACT.PRC" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q177604/", "model": { "registry_id": "vr.tr.alkylation", "name": "alkylation", "purpose": "Let an agent explain alkylation and methylation in chemistry and biology, relay major reactions and industrial uses from chemistry references, describe biological methylation and its role in epigenetics and disease, and distinguish alkylation from acylation and other reactions.", "definition": "A chemical reaction that transfers an alkyl group from one molecule to another, including methylation as the transfer of a methyl group, used in organic synthesis through reactions such as Friedel-Crafts alkylation and Blanc chloromethylation, in petroleum refining to make high-octane alkylate, and in biology where enzymes methylate DNA, histones and other macromolecules to regulate gene expression, with hypermethylation implicated in cancer; alkylating agents that attach alkyl groups to DNA are used as chemotherapy and are also toxic and carcinogenic.", "what_it_is_for": "Not applicable; a class of reactions.", "affordances": [ "explain the reaction class", "relay major reactions and uses", "describe biological methylation", "distinguish from related reactions" ], "distinguishing_features": [ "Alkyl group transfer", "Synthetic and biological forms", "Epigenetic role", "Reactive agents" ], "appearance": "Not a visible object; bond formation to alkyl groups.", "visual_identification": [ "Transfer of an alkyl group", "Methylation, Friedel-Crafts alkylation, Blanc chloromethylation, refinery alkylation, DNA and histone methylation", "Acylation transfers acyl groups; arylation transfers aryl groups" ], "physical_properties": [ { "quantity": "refinery alkylate octane", "typical_range": "about 90-95", "unit": "RON", "note": "" }, { "quantity": "human DNA methylation", "typical_range": "about 70-80", "unit": "percent", "note": "of CpG sites" } ], "families_and_kinds": [ "Friedel-Crafts and other electrophilic alkylations", "nucleophilic alkylation including Williamson ether synthesis", "Blanc chloromethylation", "refinery alkylation with isobutane and olefins", "biological methylation of DNA, RNA, histones and proteins", "hypermethylation and hypomethylation in disease", "alkylating agents as chemotherapy" ], "related_models": [ { "relation": "is a kind of", "target": "chemical reaction", "why": "in registry terms" }, { "relation": "includes", "target": "methylation", "why": "as methyl transfer" }, { "relation": "is used in", "target": "petroleum refining", "why": "to produce alkylate" }, { "relation": "underlies", "target": "epigenetics", "why": "through DNA and histone methylation" } ], "identifiers": [], "standards_and_regulation": [ "Chemical safety rules for alkylating agents and refinery acids", "Drug regulation of alkylating chemotherapy", "IUPAC reaction nomenclature" ], "failure_modes_and_hazards": [ "Toxicity and carcinogenicity of alkylating agents", "Refinery hydrofluoric acid hazards", "Agents giving personal medication advice", "Confusing chemical and biological senses" ], "in_scope": [], "out_of_scope": [], "characteristics": [] }, "sources": [], "structure": { "bundles": [ { "id": "understand", "name": "Understand", "description": "What alkylation is.", "rationale": "Science.", "layers": [ { "id": "definition", "name": "Definition", "description": "Definition and mechanisms.", "findings": [ { "id": "definition-finding", "name": "Definition", "description": "Definition.", "questions": [ { "text": "What is alkylation, and how do electrophilic and nucleophilic mechanisms work?", "kind": "definition" }, { "text": "Is the question about synthetic alkylation, refinery alkylation, biological methylation or chemotherapy?", "kind": "boundary" } ] } ] }, { "id": "reactions", "name": "Reactions", "description": "Named reactions.", "findings": [ { "id": "reactions-finding", "name": "Reactions", "description": "Reactions.", "questions": [ { "text": "How do Friedel-Crafts alkylation, Blanc chloromethylation and Williamson ether synthesis proceed?", "kind": "definition" }, { "text": "Which entry fits the specific reaction?", "kind": "action" } ] } ] } ] }, { "id": "industry", "name": "Industry", "description": "Industrial uses.", "rationale": "Application.", "layers": [ { "id": "refining", "name": "Refining", "description": "Refinery alkylation.", "findings": [ { "id": "refining-finding", "name": "Refining", "description": "Refining.", "questions": [ { "text": "How does refinery alkylation produce high-octane alkylate, and what hazards do the acid catalysts pose?", "kind": "provenance" }, { "text": "Which references are standard?", "kind": "provenance" } ] } ] }, { "id": "synthesis", "name": "Synthesis", "description": "Synthesis.", "findings": [ { "id": "synthesis-finding", "name": "Synthesis", "description": "Synthesis.", "questions": [ { "text": "How is alkylation used in pharmaceutical and fine chemical synthesis?", "kind": "provenance" }, { "text": "Which entry fits organic synthesis?", "kind": "action" } ] } ] } ] }, { "id": "biology", "name": "Biology", "description": "Biological methylation.", "rationale": "Science.", "layers": [ { "id": "epigenetics", "name": "Epigenetics", "description": "Epigenetics.", "findings": [ { "id": "epigenetics-finding", "name": "Epigenetics", "description": "Epigenetics.", "questions": [ { "text": "How do DNA and histone methylation regulate genes, and what do hypermethylation and hypomethylation mean in cancer?", "kind": "provenance" }, { "text": "Which sources are cited?", "kind": "provenance" } ] } ] }, { "id": "agents", "name": "Agents", "description": "Alkylating agents.", "findings": [ { "id": "agents-finding", "name": "Agents", "description": "Agents.", "questions": [ { "text": "How do alkylating agents act as chemotherapy, and why are they also toxic, in general terms?", "kind": "provenance" }, { "text": "Is the user asking about their own treatment, which needs their oncology team?", "kind": "boundary" } ] } ] } ] }, { "id": "context", "name": "Context", "description": "History and safety.", "rationale": "Context.", "layers": [ { "id": "history", "name": "History", "description": "History.", "findings": [ { "id": "history-finding", "name": "History", "description": "History.", "questions": [ { "text": "How did alkylation chemistry develop from Friedel and Crafts to refinery processes and epigenetics?", "kind": "provenance" }, { "text": "Which entry fits the history of organic chemistry?", "kind": "action" } ] } ] }, { "id": "safety", "name": "Safety", "description": "Safety.", "findings": [ { "id": "safety-finding", "name": "Safety", "description": "Safety.", "questions": [ { "text": "What safety rules govern alkylating agents in laboratories and industry?", "kind": "provenance" }, { "text": "Which entry fits chemical safety?", "kind": "action" } ] } ] } ] } ] }, "openQuestions": [ "Should DNA methylation and Friedel-Crafts alkylation be separate primary entries?", "How should chemistry and biology references be linked?", "The registry entry has merged aliases naming named reactions and biological processes; should they be split off?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }, "draft": { "generator": "vr.draft.v3", "status": "draft-generated", "researched": false, "archetype": "abstract concept", "method": "Written from the archetype playbook - what this kind of thing needs beyond identity and provenance - and from the structure that recurred across 6,333 models already researched by two engines. Applied to this entry by rule. No source was read for this thing and no claim here is researched. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.", "facetsInferred": true, "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.", "purpose": "Give an agent a durable, checkable way to recognise a alkylation, record what state it is in, and decide what may be done with it.", "whatItIs": "Let an agent explain alkylation and methylation in chemistry and biology, relay major reactions and industrial uses from chemistry references, describe biological methylation and its role in epigenetics and disease, and distinguish alkylation from acylation and other reactions.", "characteristics": { "substance": "activity", "origin": "conceptual", "agency": "inert" }, "whatYouCanDoWithIt": [ "observed and measured" ], "distinguishingFeatures": [ "Names folded into this entry, which a task may need to split apart again: methylation, macromolecule methylation, hypermethylation, Blanc chloromethylation.", "4 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.", "Described in 41 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is." ], "openQuestionsForResearch": [ "Which of the bundles below does a real task actually need, and which are ceremony?", "What does this thing have that the facets do not capture at all?", "Which neighbouring kind is most often confused with a alkylation, and on what evidence are they told apart?" ], "whatItIsMadeOf": "something that happens over time", "physicalCharacter": [ "Does nothing on its own; everything it does, something else did to it.", "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing." ], "whatCanBeDoneWithIt": [ "observe it, measure it, record its state" ], "howItIsRecognised": [ "Nothing to see. What is recognised is an instance of it, and which instances count is exactly what is argued about." ], "relatedModels": [ { "relation": "covers", "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.", "targets": [ "methylation", "macromolecule methylation", "hypermethylation", "Blanc chloromethylation" ] } ], "standing": "Described in 41 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 4 finer distinctions are held inside this entry as names rather than as separate models.", "structure": { "bundles": [ { "id": "identity-and-classification", "name": "Identity, naming and classification", "description": "How an agent tells one alkylation from another, and a alkylation from things that resemble it.", "rationale": "Recognition comes before every other claim. Without stable identity nothing else in the model can be trusted to be about the same thing twice.", "layers": [ { "id": "naming-and-identifiers", "name": "Names and identifiers", "description": "The names this thing goes by and the identifiers that survive translation and time.", "findings": [ { "id": "preferred-name-and-aliases", "name": "Preferred name, aliases and local names", "description": "Which name to use, which names mean the same thing, and which merely sound similar.", "questions": [ { "id": "preferred-name-and-aliases-q01", "text": "What identifies and describes the name of a alkylation, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "preferred-name-and-aliases-q02", "text": "Who or what asserted this about the name of a alkylation, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "preferred-name-and-aliases-q03", "text": "What may an agent decide or do once the name of a alkylation is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "stable-identifiers", "name": "Stable identifiers and external keys", "description": "Identifiers that keep pointing at this kind of thing across systems and languages.", "questions": [ { "id": "stable-identifiers-q01", "text": "What identifies and describes an identifier for a alkylation, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stable-identifiers-q02", "text": "Who or what asserted this about an identifier for a alkylation, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stable-identifiers-q03", "text": "What may an agent decide or do once an identifier for a alkylation is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "classification-and-granularity", "name": "Classification and granularity", "description": "Where a alkylation sits among kinds, and how finely a task needs to cut it.", "findings": [ { "id": "kind-and-parents", "name": "Kind, parents and neighbouring kinds", "description": "The classes this thing belongs to and the ones it is next to.", "questions": [ { "id": "kind-and-parents-q01", "text": "What identifies and describes the kind of a alkylation, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "kind-and-parents-q02", "text": "Who or what asserted this about the kind of a alkylation, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "kind-and-parents-q03", "text": "What may an agent decide or do once the kind of a alkylation is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "distinguishing-features", "name": "Distinguishing features", "description": "What separates a alkylation from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a alkylation, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "distinguishing-features-q02", "text": "Who or what asserted this about what distinguishes a alkylation, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "distinguishing-features-q03", "text": "What may an agent decide or do once what distinguishes a alkylation is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "state-and-lifecycle", "name": "State and lifecycle", "description": "The states a alkylation passes through and the events that move it between them.", "rationale": "Most decisions about a thing depend on what state it is in now, which is a claim with a time on it, not a property.", "layers": [ { "id": "lifecycle-stages", "name": "Lifecycle stages", "description": "From coming into existence to ceasing to be one of these.", "findings": [ { "id": "stages-and-transitions", "name": "Stages and transitions", "description": "The stages worth naming and what moves a alkylation between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a alkylation, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stages-and-transitions-q02", "text": "Who or what asserted this about the lifecycle of a alkylation, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stages-and-transitions-q03", "text": "What may an agent decide or do once the lifecycle of a alkylation is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "observations-and-status", "name": "Observations and current status", "description": "What is observed about a alkylation, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a alkylation is recorded so that it can be superseded rather than overwritten.", "questions": [ { "id": "observation-record-q01", "text": "What identifies and describes an observation of a alkylation, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "observation-record-q02", "text": "Who or what asserted this about an observation of a alkylation, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "observation-record-q03", "text": "What may an agent decide or do once an observation of a alkylation is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "process-and-outcome", "name": "Process, inputs and outcome", "description": "How a alkylation proceeds, what it needs and what it leaves behind.", "rationale": "An activity is known by its steps and its results, and both have to be recordable while it is still running.", "layers": [ { "id": "steps-and-sequence", "name": "Steps and sequence", "description": "The steps of a alkylation, their order and what may run in parallel.", "findings": [ { "id": "steps-and-preconditions", "name": "Steps, preconditions and completion", "description": "What has to be true before each step of a alkylation and what marks it done.", "questions": [ { "id": "steps-and-preconditions-q01", "text": "What identifies and describes a step of a alkylation, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "steps-and-preconditions-q02", "text": "Who or what asserted this about a step of a alkylation, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "steps-and-preconditions-q03", "text": "What may an agent decide or do once a step of a alkylation is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "inputs-and-results", "name": "Inputs, resources and results", "description": "What a alkylation consumes and what it produces.", "findings": [ { "id": "inputs-and-outputs", "name": "Inputs, outputs and side effects", "description": "The resources a alkylation takes and the results it leaves, wanted or not.", "questions": [ { "id": "inputs-and-outputs-q01", "text": "What identifies and describes the inputs and results of a alkylation, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "inputs-and-outputs-q02", "text": "Who or what asserted this about the inputs and results of a alkylation, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "inputs-and-outputs-q03", "text": "What may an agent decide or do once the inputs and results of a alkylation is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "definitions-in-contest", "name": "Definitions and who holds them", "description": "What alkylation is taken to mean, and by whom.", "rationale": "When a field disagrees about a concept, the disagreement is the content. A model that picks one definition silently destroys the information.", "layers": [ { "id": "competing-definitions", "name": "Competing definitions", "description": "The main readings and the traditions behind them.", "findings": [ { "id": "definition-map", "name": "Definitions and their holders", "description": "Each definition with the school or body that holds it.", "questions": [ { "id": "definition-map-q01", "text": "Which definitions of alkylation are in use, and which tradition or body holds each?", "kind": "definition" }, { "id": "definition-map-q02", "text": "What turns on the difference between them in practice?", "kind": "boundary" } ] } ] }, { "id": "operationalisation", "name": "Operationalisation", "description": "How it is measured or applied when it has to be.", "findings": [ { "id": "operational-record", "name": "Measures and proxies", "description": "Instruments and indicators used to stand in for it.", "questions": [ { "id": "operational-record-q01", "text": "How is alkylation operationalised or measured in practice, and by what instrument?", "kind": "measurement" }, { "id": "operational-record-q02", "text": "What does that operationalisation leave out, and when does that matter?", "kind": "boundary" } ] } ] } ] }, { "id": "instances-and-use", "name": "Instances, use and consequence", "description": "What counts as an instance of alkylation and what follows from calling something that.", "rationale": "Applying a concept is an act with consequences, so a model must say what the label licenses and what it does not.", "layers": [ { "id": "instances", "name": "What counts as an instance", "description": "Clear cases, borderline cases and non-cases.", "findings": [ { "id": "instance-tests", "name": "Tests for an instance", "description": "What would settle whether something falls under it.", "questions": [ { "id": "instance-tests-q01", "text": "What would settle whether something is an instance of alkylation?", "kind": "boundary" }, { "id": "instance-tests-q02", "text": "Which borderline cases are argued about, and on what grounds?", "kind": "definition" } ] } ] }, { "id": "consequence", "name": "Consequence of application", "description": "Rights, duties or decisions that follow from the label.", "findings": [ { "id": "consequence-record", "name": "What the label licenses", "description": "What an agent may do once something is classified this way.", "questions": [ { "id": "consequence-record-q01", "text": "What follows practically once something is treated as alkylation?", "kind": "action" }, { "id": "consequence-record-q02", "text": "What must an agent not infer from the label alone?", "kind": "action" } ] } ] } ] }, { "id": "provenance-and-evidence", "name": "Provenance, evidence and time", "description": "Where every claim about a alkylation came from and when it held.", "rationale": "A claim without a source and a time cannot be superseded, only overwritten, and an agent that overwrites loses the ability to explain itself.", "layers": [ { "id": "source-and-authority", "name": "Source and authority", "description": "Who said it, on what evidence, and how strongly.", "findings": [ { "id": "claim-provenance", "name": "Claim provenance and confidence", "description": "The authority behind each claim about a alkylation and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a alkylation, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "claim-provenance-q02", "text": "Who or what asserted this about a claim about a alkylation, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "claim-provenance-q03", "text": "What may an agent decide or do once a claim about a alkylation is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "time-and-versions", "name": "Time, versions and supersession", "description": "When a claim was true, when it was learnt, and what replaced it.", "findings": [ { "id": "validity-and-supersession", "name": "Validity period and supersession", "description": "How an old claim about a alkylation is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a alkylation, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "validity-and-supersession-q02", "text": "Who or what asserted this about the validity of a claim about a alkylation, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "validity-and-supersession-q03", "text": "What may an agent decide or do once the validity of a claim about a alkylation is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] } ] }, "statistics": { "bundles": 6, "layers": 12, "findings": 14, "questions": 38 } } } }