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juglone

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juglone
juglone Chem. (ˈdʒuː-, ˈdʒʌgləʊn) Also † juglon. [ad. G. juglon (C. Reischauer 1877, in Ber. d. Deut. Chem. Ges. X. 1542), f. L. iūglans walnut: see -one.] 5-Hydroxy-1,4-naphthoquinone, C10H6O3, a reddish-yellow crystalline compound obtained from the green shells of walnuts and having fungicidal pro... Oxford English Dictionary
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Juglone
This is rapidly oxidized to juglone once exposed to air. Uses Juglone is occasionally used as a herbicide. wikipedia.org
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Juglone 3-monooxygenase
In enzymology, juglone 3-monooxygenase () is an enzyme that catalyzes the chemical reaction 5-hydroxy-1,4-naphthoquinone + AH2 + O2 3,5-dihydroxy-1,4 Other names in common use include juglone hydroxylase, naphthoquinone hydroxylase, and naphthoquinone-hydroxylase. wikipedia.org
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sternutator
sternutator (ˈstɜːnjuːteɪtə(r)) [f. sternutat- (in sternutatory a. and n., etc.) + -or.] A substance that causes nasal irritation; esp. a poison gas that causes irritation of the nose and eyes, pain in the chest, and nausea.1922 Encycl. Brit. XXXII. 111/2 The sternutators were originally considered ... Oxford English Dictionary
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Juglans australis
Like most walnuts, J. australis produces juglone, an allelopathic substance which decreases competition from other plants growing nearby. wikipedia.org
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nucin
nucin Chem. (ˈnjuːsɪn) [f. L. nuc-, nux nut + -in.] A crystalline substance obtained from green walnut-shells.1885 in Cassell. 1892 Thorpe Dict. Appl. Chem. III. 100 Juglone.., Nucin, Regianin. Oxford English Dictionary
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Naphthoquinone
isomers are common for the parent naphthoquinones: 1,2-Naphthoquinone 1,4-Naphthoquinone Natural products Alkannin Hexahydroxy-1,4-naphthalenedione Juglone wikipedia.org
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Juglans
Juglone is toxic to plants such as tomato, apple, and birch, and may cause stunting and death of nearby vegetation. a walnut is removed as its roots slowly decompose and release juglone into the soil. wikipedia.org
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Juglans nigra
Even after a tree is removed the soil where the roots once were will still contain juglone for several years after the tree is removed as more juglone Symptoms of juglone poisoning include foliar yellowing and wilting. A number of plants are particularly sensitive. wikipedia.org
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What chemical or biochemical agents do plants use to inhibit each other's growth? As I just learned, allelopathy is the action by which plants regulate the growth of other nearby plants. I have hear of ethylene is a...
A classic example is juglone from Black Walnut tree roots. This review from 1973 discusses juglone and allelopathy, inhibiting growth of other trees. That led to work testing juglone on cancer cells.
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Juglans mandshurica
The Manchurian walnut contains and exudes much lesser quantities of allelopathic compounds (such as juglone) than other popular Juglans species and usually wikipedia.org
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1,4-Naphthoquinone
Other natural naphthoquinones include juglone, plumbagin, droserone. Naphthoquinone derivatives have significant pharmacological properties. wikipedia.org
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Plumbagin
See also Juglone References 1,4-Naphthoquinones Hydroxynaphthoquinones wikipedia.org
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Lawsone
Juglone is a structural isomer used as a brown dye. References Natural dyes 1,4-Naphthoquinones Hydroxyarenes wikipedia.org
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柿根的化学成分是什么?
根含3-甲氧基-7-甲基-胡桃叶醌（3-methoxy-7-methyl-juglone）和新柿醌（neodiospyrin），此外还有强心甙、蒽甙、皂甙反应，并含鞣质、淀粉。
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