The identification of the 'apparent vitamin C' of the walnut (<i>Juglans regia</i>) with hydrojuglone glucoside

Daglish, C.

doi:10.1042/bj0470462

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…26 2-Methyl-1,4-naphthoquinone, 1,4-naphthoquinone, and plumbagin (5-hydroxy-2-methyl-1,4-naphthoquinone) have been reported from the husks of walnuts. 27,28 The presence of sterols 29 , carbohydrates 29 , and ascorbic acid 30 have been reported from various parts of the walnut tree. Flavonoid glycosides, hydrolyzable tannins together with adenosine and adenine have also been reported from this plant.…”

Section: Resultsmentioning

confidence: 99%

“…4,[21][22][23] Additionally, various classes of secondary metabolites such as terpenoids, steroids, phenolics, quinones, flavonoids, flavonoid glycosides, carbohydrates, ascorbic acid, adenosine, and adenine have also previously been reported from various parts of J. regia. [24][25][26][27][28][29][30][31][32] The GC-MS phytochemical analysis of various solvent extracts viz. petroleum ether, hexane, ethyl acetate, chloroform-methanol (2:1, v/v) and chloroform-methanol-water (2:2:1.8, v/v/v) extracts prepared from the seeds of J. regia have previously been reported.…”

Section: Introductionmentioning

confidence: 99%

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Phytochemical Characterization of Extracts from Fagraea Fragrans and Juglans Regia by GC-MS Analysis

Pillai

Young

2022

Fine Chemical Engineering

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Fagraea fragrans and Juglans regia have several therapeutic applications. The present study aimed to analyze the phytochemical compositions of a methanolic crude extract from the stem bark of F. fragrans and an oily liquid from a chloroform extract of seeds of J. regia. Approximately, 220 g of methanolic crude extract (yield = ca. 5%) was obtained from the stem bark of F. fragrans from hot-solvent extraction, and approximately, 45 g of chloroform oily liquid (yield = ca. 1.5%) was obtained from the seeds of J. regia by maceration technique. The phytochemical compositions of these two extracts were analyzed separately by injecting an aliquot of 1.0 μL solution of each extract prepared in hexane to a GC-MS instrument fitted with a DB-5 column of the dimension 50 m × 0.25 mm, i.d., 0.25 μm film thickness. The presence of fourteen components, including fragrant aldehydes and bioactive sterols, was identified in the methanolic crude extract and the presence of eight components, including fatty acids, fatty esters, and γ-tocopherol, was identified in the chloroform oily liquid. For the first time, we report the presence of γ-tocopherol (3.46%), n-hexanoic acid (1.26%), ethyl hexadecanoate (4.70%), ethyl oleate (6.59%), and a high content of ethyl linoleate (29.93%) in this chloroform oily liquid. From this study, we concluded that F. fragrans and J. regia have bioactive compounds of pharmaceutical importance. Therefore, these compounds can be extracted from these plants for therapeutic applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phytochemical Characterization of Extracts from Fagraea Fragrans and Juglans Regia by GC-MS Analysis

Pillai

Young

2022

Fine Chemical Engineering

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“…The toxin responsible, juglone (XXXVI), is stored in the leaves as the non-toxic glycoside of 1,4,5-trihydroxynaphthalene (XXXVII). Ju of the glycoside and subsequent oxidation of the hydroquinone after the leaves fall on the ground (41).…”

Section: Allomonesmentioning

confidence: 99%

Chemical ecology: chemical communication in nature

Wood¹

1983

J. Chem. Educ.

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Chemical ecology is the science dealing with the interactions of organisms with their surroundings and each other by means of the chemicals they produce or receive. When a chemical message is exchanged between members of the same or different species, the substances that deliver these messages are called semiochemicals, a name derived from the Greek word, semeon, meaning a mark or signal (I). Semiochemicals are

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“…The walnut tree (Juglans nigra) provides an often cited example of a plant that has an adverse effect on growth of other plant species. The compound responsible for this allelopathic effect is juglone, a hydroxyquinone formed in soil by hydrolysis of the 4-glucoside of 1,4,5-trihydroxynaphthalene which is synthesized by the walnut tree and washed from the leaves onto the underlying soil by rain and dew [1]. According to the natural occurrence of juglone the existence of microbes that are able to degrade this compound seemed possible, despite its biocidal properties.…”

Section: Introductionmentioning

confidence: 99%

Degradation of juglone by Pseudomonas putida J 1

Rettenmaier¹

1983

FEMS Microbiology Letters

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The identification of the 'apparent vitamin C' of the walnut (Juglans regia) with hydrojuglone glucoside

Cited by 6 publications

References 5 publications

Phytochemical Characterization of Extracts from Fagraea Fragrans and Juglans Regia by GC-MS Analysis

Phytochemical Characterization of Extracts from Fagraea Fragrans and Juglans Regia by GC-MS Analysis

Chemical ecology: chemical communication in nature

Degradation of juglone by Pseudomonas putida J 1

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