{
    "title": "Japanese Knotweed -- Extraction of Resveratrol",
    "inventor_name": null,
    "publication_year": null,
    "device_name": "Resveratrol extraction method (enzymolysis)",
    "goal": "Extract high-purity resveratrol from invasive Japanese Knotweed for use in food, cosmetics, and pharmaceuticals.",
    "problem_addressed": "Japanese Knotweed is a costly invasive species; extracting valuable resveratrol turns waste into a useful product while helping control the weed.",
    "concept_summary": "A multi-step process that uses enzymolysis to break down giant knotweed rhizome, followed by alcohol solvent extraction, concentration, and drying to produce crystalline resveratrol of up to 98 % purity.",
    "detailed_description": null,
    "principles": [
        "Enzymatic hydrolysis (enzymolysis) of plant material",
        "Solvent extraction with alcohol",
        "Concentration and crystallization",
        "Drying to obtain powder"
    ],
    "scientific_domains": [
        "Chemistry",
        "Food Science",
        "Plant Biology",
        "Materials Science"
    ],
    "mechanisms_of_action": [
        "Enzyme-mediated breakdown of cell walls releases intracellular resveratrol",
        "Alcohol solvent dissolves resveratrol while leaving most impurities behind",
        "Evaporation and cooling induce crystallisation of resveratrol",
        "Drying removes residual solvent"
    ],
    "materials": [
        "Giant knotweed rhizome (Polygonum cuspidatum)",
        "Commercially available enzymes (unspecified)",
        "Alcohol solvent (e.g., ethanol)",
        "Water"
    ],
    "energy_sources": [],
    "inputs": [
        "Knotweed rhizome",
        "Enzymes",
        "Alcohol solvent",
        "Water"
    ],
    "outputs": [
        "Resveratrol crystal powder",
        "Aqueous waste liquid"
    ],
    "claimed_performance": "Maximum purity of 98.31 % and high overall yield (exact figure not disclosed).",
    "experimental_evidence": "The patent description states the method achieves up to 98.31 % purity and a high overall yield, but no quantitative experimental data or independent verification are provided.",
    "replication_status": null,
    "keywords": [
        "Japanese Knotweed",
        "Resveratrol",
        "Enzymolysis",
        "Extraction",
        "Invasive species",
        "Food supplement",
        "Cosmetics"
    ],
    "related_technologies": [
        "Supercritical CO_2 extraction",
        "Microwave-assisted extraction",
        "Traditional solvent extraction"
    ],
    "controversy_level": "low",
    "confidence_score": 0.8,
    "practicability_score": 0.7,
    "fringe_score": 0.2,
    "evidence_strength": 0.4,
    "risk_score": 0.2,
    "trl_estimate": 6,
    "source_urls": [
        "http://www.eatheweeds.com",
        "http://www.newtritionink.de/shop/pdf/english.pdf",
        "http://rexresearch.com"
    ],
    "organizations": [],
    "applications": [
        "Food supplement",
        "Cosmetics",
        "Pharmaceuticals"
    ],
    "limitations": [
        "Requires specific enzymes and controlled reaction conditions",
        "Scale-up and cost of solvent recovery not demonstrated",
        "Purity depends on precise control of extraction parameters"
    ],
    "open_questions": [
        "Economic viability at industrial scale",
        "Environmental impact of solvent use and waste handling",
        "Consistency of purity across batches"
    ],
    "red_flags": [
        "Lack of peer-reviewed experimental data",
        "Performance claims are based solely on patent text"
    ],
    "evidence_quotes": [
        "The maximum purity is 98.31 %.",
        "The overall yield is high.",
        "The method has the characteristics of short time, low operating cost, high operation safety.",
        "The waste liquid is mainly water.",
        "The sprouts yield 70 g per day and m^2."
    ],
    "category": "Chemistry & Chemical Processes"
}