{
    "title": "Fumaric Acid vs Methane",
    "inventor_name": "Robert WALLACE, et al.",
    "publication_year": 2006,
    "device_name": "Encapsulated Fumaric Acid Feed Additive",
    "goal": "Reduce methane emissions from ruminants and improve animal growth and milk/meat quality.",
    "problem_addressed": "Methane emissions from livestock (ruminants) contribute significantly to greenhouse-gas emissions and represent an energy loss for the animal.",
    "concept_summary": "The invention uses encapsulated fumaric acid (or its salts) as a feed additive for ruminants. The organic acid acts as a hydrogen sink in the rumen, diverting reducing equivalents away from methanogenic archaea and toward propionate formation, thereby decreasing methane production. Encapsulation provides a slow-release profile that avoids a drop in rumen pH and improves palatability.",
    "detailed_description": null,
    "category": "Other",
    "principles": [
        "Hydrogen competition with methanogens",
        "Slow-release encapsulation",
        "Rumen pH stabilization"
    ],
    "scientific_domains": [
        "Animal Nutrition",
        "Microbiology",
        "Environmental Science"
    ],
    "mechanisms_of_action": [
        "Fumaric acid acts as an alternative hydrogen acceptor, reducing H_2 availability for methanogenesis",
        "Encapsulation delays acid release, maintaining rumen pH above 6",
        "Increased propionate formation redirects carbon flow"
    ],
    "materials": [
        "Fumaric acid",
        "Potassium fumarate",
        "Sodium fumarate",
        "Partially hydrogenated vegetable oil (lipid coating)",
        "Polyethylene glycol",
        "Polyvinyl pyrrolidone",
        "Cellulose-based polymers",
        "Hydroxyalkyl carboxylate polyester"
    ],
    "energy_sources": [],
    "inputs": [
        "Standard ruminant feed (cereals, roughage, minerals, vitamins)",
        "Encapsulated fumaric acid additive"
    ],
    "outputs": [
        "Reduced rumen methane emissions",
        "Increased animal weight gain",
        "Improved milk and meat quality"
    ],
    "claimed_performance": "Methane production reduced by up to 70 % in lamb trials; faster weight gain observed; no undesirable rumen pH drop when acid is encapsulated.",
    "experimental_evidence": "In vitro and in vivo studies (Figures 1-10) showed up to 70 % reduction in methane production in lambs and increased propionate concentrations; encapsulated fumaric acid maintained rumen pH above 6.",
    "replication_status": "No independent replication reported in the article.",
    "keywords": [
        "Fumaric acid",
        "Ruminant feed additive",
        "Methane mitigation",
        "Encapsulation",
        "Slow release",
        "Propionate",
        "Rumen microbiology"
    ],
    "related_technologies": [
        "Ruminant feed additives",
        "Encapsulation technology",
        "Methane mitigation strategies"
    ],
    "controversy_level": "low",
    "confidence_score": 0.9,
    "practicability_score": 0.8,
    "fringe_score": 0.2,
    "evidence_strength": 0.6,
    "risk_score": 0.1,
    "trl_estimate": 6,
    "source_urls": [
        "https://phys.org/news/2008-03-scientists-cow-flatulence.html",
        "https://www.theguardian.com/commentisfree/2018/aug/25/veganism-intensively-farmed-meat-dairy-soya-maize"
    ],
    "organizations": [
        "Rowett Research Institute",
        "Bakesure (trademark)"
    ],
    "applications": [
        "Livestock methane emission reduction",
        "Improved animal growth rates",
        "Enhanced milk and meat production"
    ],
    "limitations": [
        "Potential rumen pH drop with non-encapsulated acids",
        "Cost and scalability of encapsulation process",
        "Need for precise dosing to avoid feed palatability issues"
    ],
    "open_questions": [
        "Long-term health effects on ruminants",
        "Economic viability at commercial scale",
        "Impact on milk composition and consumer safety"
    ],
    "red_flags": [
        "Claims of up to 70 % reduction are based on limited trial data; no large-scale field trials reported"
    ],
    "evidence_quotes": [
        "The scientists found that adding fumaric acid to animal feed can inhibit the production of methane that occurs naturally as part of the animal's digestive process. Tests of the feed additive on lambs showed methane production can be cut by up to 70 percent.",
        "Figure 1 shows the mode of action of an organic acid in decreasing methane formation.",
        "Typically the amount of said at least one organic acid, especially fumaric acid, and/or salt(s) thereof, will be from about 1% - 20% w/total weight of feed composition, such as 10% - 20%, preferably 7.5% - 15%.",
        "Encapsulating said at least one organic acid or salt thereof does not lead to such an undesirable pH drop in the rumen, as observed when using unencapsulated organic acid, such as fumaric acid.",
        "The feed composition of the present invention can be manufactured by conventional means."
    ]
}