Fatty acids of Neem oil

Rao, Chinthu Joginarayana; Seshadri, T. R.

doi:10.1007/bf03051848

Cited by 6 publications

(6 citation statements)

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“…When compared with it, only 28.5% samples were in order, with 21.5% below and 50.0% above the range. A range of 36.9-74.3% of iodine value in neem oils has been reported earlier by several workers (Roy and Dutt, 1929;Child and Ramanathan, 1936;Hilditch and Murti, 1939;Dasa Rao and Seshadari, 1942;Skellon et al, 1962). A far wider range was observed in the present samples.…”

Section: Resultssupporting

confidence: 88%

“…Only 12% of the test samples corresponded to the prescribed value, with 33.3% below and 54.7% above it. In earlier studies, the refractive index values of neem oil have been reported to vary from 1.4560 to 1.4620 (Roy and Dutt, 1929;Child and Ramanathan, 1936;Dasa Rao and Seshadari, 1942). The present results also show a similar variation.…”

Section: Resultssupporting

confidence: 86%

“…Different workers (Roy and Dutt, 1929;Child and Ramanathan, 1936;Hilditch and Murti, 1939;Dasa Rao and Seshadari, 1942;Skellon et al, 1962) have earlier reported similar results with the acid values of neem oil ranging from 0.77% to 41.0%. The present results reveal prevalence of similar variation.…”

Section: Resultsmentioning

confidence: 59%

“…The range of the saponification value (196.0-200.0) prescribed in The Indian Pharmacopoeia (1966) gave a sample distribution percentage as follows: within range, 2.4%; below range, 23.8%; and above range, 73.8%. Different workers (Roy and Dutt, 1929;Child and Ramanathan, 1936;Hilditch and Murti, 1939;Dasa Rao and Seshadari, 1942;Skellon et al, 1962) have earlier reported similar results with saponification values of neem oil ranging from 196.0 to 234.6. The present results reveal prevalence of a still wider variation in Indian neem ecotypes.…”

Section: Resultsmentioning

confidence: 60%

“…Neem kernels contain 30-45% (w/w) oil (Koul et al, 1990;Parmar and Ketkar, 1993). Variation in its physicochemical characteristics such as color, specific gravity, refractive index, saponification, iodine and acid values, and chemical constituents, namely the fatty acid composition, is reported (Roy and Dutt, 1929;Child and Ramanathan, 1936;Hilditch and Murti, 1939;Dasa Rao and Seshadari, 1942;Skellon et al, 1962). The variation in content of the key meliacin, azadirachtin, is also well documented (Ermel et al, 1987;Rengasamy et al, 1993).…”

Section: Introductionmentioning

confidence: 97%

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Physicochemical and Chemical Variation in Neem Oils and Some Bioactivity Leads againstSpodoptera lituraF.

Kumar

Parmar

1996

J. Agric. Food Chem.

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Forty-two neem ecotypes of India have been found to show a wide variation in the content of oil, and their physicochemical characteristics (color, specific gravity, refractive index, iodine value, acid value, and saponification value), total fatty acid, fatty acid composition (oleic, stearic, palmitic, linoleic, myristic, arachidic, and behenic acids), and the key meliacins (azadirachtin, nimbin, and salannin). The azadirachtin content did not correlate with any of the physicochemical and chemical parameters, but the nimbin and salannin contents correlated significantly with each other. The refractive index (+ve correlation) and iodine value (−ve correlation) showed weak but significant correlation with the contents of nimbin and salannin. Insect growth inhibition of Spodoptera litura revealed a wide variation in the EC50 of the oils. The salannin and azadirachtin contents of the oils correlated the most with bioactivity. The iodine and acid values correlated weakly but significantly with bioactivity. Keywords: Neem; neem oil; physicochemical variation in neem; chemical variation in neem; neem bioactivity

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Section: Resultssupporting

confidence: 88%

Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 59%

Section: Resultsmentioning

confidence: 60%

Section: Introductionmentioning

confidence: 97%

See 3 more Smart Citations

Physicochemical and Chemical Variation in Neem Oils and Some Bioactivity Leads againstSpodoptera lituraF.

Kumar

Parmar

1996

J. Agric. Food Chem.

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Über die Anwendung der papierchromatographischen Analyse auf dem Fettgebiet. 4. Mitt. Über ölsäurereiche Samenöle. Ermittlung der konstituierenden Fettsäuren der Samenöle von Margosa (Azadirachta indica), Cashewkern (Anacardicum occidentale) und Putranjiva Roxburghii

Chowdhury

Mukherjea

1963

Nahrung

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Anhand des Schrifttums und eigener Erfahrungen wird über die möglichen Komplikationen berichtet, die sich der papyrographischen Analyse der Gesamtfettsäuren von natürlichen Fetten und Ölen in Abhängigkeit von Art und Menge der konstituierenden Fettsäuren entgegenstellen. Durch Begrenzung des Imprägnierungsgrades des Papieres (Cerosin/Essigsäure) auf 0,1 und bei Anwendung einer 99,5%igen — anstatt der bisher üblichen 95%igen — Essigsäure als Fließmittel kann die Differenzierung der gesättigten Fettsäuren bis C26 erheblich verbessert werden. Mittels der “Quecksilber‐Addukt‐Methode” ist bei Anwendung der beschriebenen Arbeitsweise die Trennung der Gesamtfettsäuren in die Fraktionen der gesättigten und der ungesättigten Vertreter mit gutem Ergebnis durchführbar. Die Verfahren zur Darstellung von reiner Palmitolein‐, Myristin‐ und Arachinsäure werden beschrieben. Zur Analyse der Gesamt fettsäuren ölsäurereicher natürlicher Öle — unter Einbeziehung der Bestimmung der Palmitoleinsäure — wird eine Kombination der “Quecksilber‐Addukt‐Methode” bzw. der “Hydrier‐Differenz‐Methode” mit der qualitativ und quantitativ papyrographischen Arbeitsweise herangezogen. Für die Samenöle von Margosa, Cashewkernen und Putranjiva Roxburghii werden die Kennzahlen sowie die qualitative und quantitative Zusammensetzung hinsichtlich der konstituierenden Fettsäuren mitgeteilt. Erstmals wird gezeigt, daß die Samenöle von Margosa und von Putranjiva Roxburghii Palmitoleinsäure in einer Menge von 1,8 bzw. 2,6% enthalten, bezogen auf die Gesamtfettsäuren.

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The component acids and glycerides of refined neem (Melia Indica) oil

Gupta

Mitra

1953

J Sci Food Agric

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The refined oil obtained after the successful removal of the bitter and odoriferous constituents of neem oil has been studied for its component acids and glycerides. Palmitic (16.2%), stearic (14.6%) and oleic (56.6%) acids were found to be the major component acids, with subordinate proportions of linoleic (9.0%) and arachidic (3.4%) and probable traces of myristic acid. The glyceride composition is in fair accordance with the ‘rule of even distribution’. The utility of the refined oil for soap‐making purposes and as a good source of technical oleine and stearine has been pointed out.

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Fatty acids of Neem oil

Cited by 6 publications

References 1 publication

Physicochemical and Chemical Variation in Neem Oils and Some Bioactivity Leads againstSpodoptera lituraF.

Physicochemical and Chemical Variation in Neem Oils and Some Bioactivity Leads againstSpodoptera lituraF.

Über die Anwendung der papierchromatographischen Analyse auf dem Fettgebiet. 4. Mitt. Über ölsäurereiche Samenöle. Ermittlung der konstituierenden Fettsäuren der Samenöle von Margosa (Azadirachta indica), Cashewkern (Anacardicum occidentale) und Putranjiva Roxburghii

The component acids and glycerides of refined neem (Melia Indica) oil

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