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Article
An Estimate of the Rate of Continental Drift in the Permian Period
CONTINENTAL drift in the Wegenerian sense is now an established theory. Also, it is believed that the super-continent Gondwanaland itself was drifting around before it was split up. This was suggested by Ahmad1, ...
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Article
Flood traps through space and time and their bearing on some problems of geotectonics
A study of world stratigraphy reveals, somewhat unexpectedly, that there were extensive basalt flows in the early Precambrian, but the Upper Precambrian and the whole of the Palaeozoic Era, with some insignifi...
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Article
829 HORMONAL VARIATION IN LBW INFANTS ON A CONSTANT GLUCOSE INFUSION
Baseline glucose (Gl), insulin (Ins), glucagon (Glucag), cortisol (Cor) and alanine (Ala) determinations were drawn between 0-1 hours in 16 LBW infants (BW 1040-1490 gms. GA 29-34 wks.) after which an I.V. ele...
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Article
The C16 monoenoic acid of zanthoxylum alatum seed oil
As a part of our screening program on unusual fatty acid-containing seed oils, we observed that the oil of Zanthoxylum alatum contains 15.4% of a C16 monoenoic acid. It was characterized as cis-9-hexa-decenoic by...
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Article
Nonedible seed oils as insect repellent
Petroleum ether extracts of seeds at 10–1% concentration were tested for insecticidal activity against stored grain insects,Tribolium castaneum Herbst., in the laboratory. About 50 oils were tested, of which ten ...
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Article
Synthesis of sulfur-Containing derivatives from olefinic fatty esters
The reaction of 3-mercaptopropan-l,2-diol with methyl 10-undecenoate (Ib) yielded three products, methyl 11-(3′-mercaptopropan-l′,2′-diacetoxy) undecanoate (II, 48.9%), methyl 11-(1-oxapropan-2′-acetoxy-3′-mer...
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Article
Oxidative cyclization of unsaturated fatty acids with lead tetraacetate
The reaction of 10-undecenoic acid with lead tetraacetate (LTA) in the presence of acetic acid and anhydrous potassium acetate gave a eutectic mixture of 10(11)-acetoxy-11(10)-methylundecanoic acid (25%), 10,1...
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Article
Fatty acids: Part 25.1 chemical transformations of C18 furanoid fatty esters
Synthetic and natural C18 furanoid fatty esters were successfully converted to the corresponding furanoid alcohols, aldehydes, halides, ethers, acetates, mesylates, and chain extended by two carbon atoms in high ...
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Article
Fatty acids: Part 26.1 partial synthesis of C18 mono-and dimethyl furanoid fatty esters
Dimethylene interrupted dioxo derivatives of 10, 13-epoxy-11-methylocadeca-10, 12-dienoate (from latex) and 9 (10), 12 (13)-epoxyoctadeca-9 (10), 11 (12)-dienoates (from linoleate) were successfully methylated...
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Article
Oxymercuration-demercuration of hydroxy acetylenic acids
Oxymercuration-demercurationof methyl 9-hydroxyoctadec-12-ynoate (I) and methyl 12-hydroxyoctadec-9-ynoate (II) gave 9-hydroxy-12-oxooctadecanoate (III) and 12-hydroxy-9-oxooctadecanoate (IV) in ca. 80% yields...
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Article
Synthesis of 2, 3 fatty aziridines
A new route for the synthesis of 2,3-aziridines is described. The reaction of methyl 2,3-dibromohexadecanoate (II) with ammonia at 0 C gave methyl 2-bromohexadec-2-enoate (III, ca. 93%). Compound III, on furth...
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Article
Derivatization of keto fatty acids. III. synthesis of terminal thiazole and oxazole derivatives from α-bromoketones
The synthesis of alkyl chain substituted thiazole and oxazole derivatives is described. The reaction of 11-bromo-10-oxoundecanoic acid with thiourea and acetamide yielded terminally located thiazole and oxazol...
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Article
Oxidative cyclization of 1-octadecanol and hydroxy fatty esters with lead tetraacetate
Oxidative cyclization of methyl 2-hydroxyoctadecanoate, methyl 10-hydroxyundecanoate and 1-octadecanol produced a good yield of the corresponding tetrahydrofuran (THF) derivatives characterized successively as...
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Article
Iodoazide addition to olefinic esters and their reaction with methanolic KOH
Addition of iodine azide to methyl 10-undecenoate (1), methyl oleate/elaidate (III,IV) and methyltrans-2-hexadecenoate (VII) yielded methyl 10-azido-11-iodoundecanoate (II, ∼ 100%), methylerythro/threo-9(10)-azid...
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Article
Derivatization of keto fatty acids: V. Synthesis and characterization of 1,3-dioxolanes
The synthesis of substituted 1,3-dioxolanes from oxo fatty acid esters using 1,2-propanediol is described. This reagent, besides forming dioxolanes, also converts the methyl ester to the 2′-hydroxy propyl este...
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Article
Derivatization of keto fatty acids: VI. Synthesis, oxidation and mass spectrometry of dithiolanes
The synthesis of alkyl chain-substituted dithiolanes, bisdithiolane and disulfolanes from oxo acids and their decomposition to original oxo acids are described. Reactions of ethanedithiol with 2 oxo esters, me...
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Article
Addition of phthalimidonitrene to acetylenic fatty acid esters: Synthesis of long-chain 2-phthalimido-2H-azirines
Lead tetraacetate (LTA) oxidations of N-aminophthalimide in the presence of acetylenic fatty acid esters have resulted in the formation of corresponding 1H-azirines that spontaneously rearranged to give 2H-azi...
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Article
Cyclopropenoid fatty acids ingnetum scandens and itsterculia pallens seed oils
Seed oils ofGnetum scandens (Gnetaceae) andSterculia pattens (Sterculiaceae) were found to contain sterculic (28.57,6.97) and malvalic (11.27,3.87) acids, respectively. Gas Chromatographic analysis of silver nitr...
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Article
Pollen grain germination and pollen tube growth following in vivo and in vitro self and interspecific pollinations in annual Cicer species
Germination of pollen grains and growth of pollen tubes were studied to determine the cause of barreness in crosses among annual Cicer species. In vivo and in vitro time-course studies and fluorescent microscopy ...
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Article
Derivatization of keto fatty acids, X: Synthesis of thiazanones
The synthesis of alkyl chain-substituted thiazanones from oxo fatty esters and a long chain aldehyde is reported. Four oxo compounds—methyl 10-oxoundecanoate, methyl 9-oxooctadecanoate, methyl 9,10-dioxooctade...
