Triterpene methyl ethers in some South American species ofCortaderia(Gramineae)
نویسندگان
چکیده
منابع مشابه
New Species of South American Plants
Cedrela Boliviina. Inflorescence sparsely and minutely canescent. Leaves (only the uppermost seen) 5 dm. long, the petiole 1 dm. long, slightly grooved upon the upper surface, like the rachis, the leaflets sub-opposite, 7 to 9 pair, the internodes about a third as long as their leaflets. Petiolules very slender, about 6 mm. long, articulating by a thin, disk-like base. Blades 8 to 16 cm. long, ...
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Chem. Abstr. Services Reg. No.: 1675-54-3 Chem. Abstr. Name: 2,2' -r (I-Methylethylidene )bis( 4, I-phenyleneoxyethylene) )bis(oxiane) . IUPAC Systematic Name: 2,2'-r(1-Methylethylidene)bis(4,i-phenyleneoxyethylene) )bis( oxiane ) Synonym: 4,4' -Bis(2,3-epoxyropoxy)diphenyldimethylmethane; 2,2-bisfpara-(2,3epoxyropoxy)phenyl)propane; 2,2-bisr 4-(2,3-epoxyropoxy)phenyl)propane; bis( 4glycidyloxy...
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RINK (1956) reported the occurrence of an unusual phenomenon at the R locus in maize. The “standard” Rr (colored aleurone, colored plant) allele was observed to have decreased pigment producing capacity after being heterozygous (R‘ RSt ) with a “pattern” allele, stippled (R“) . Additional observations by BRINK and WEYERS (1957) showed that marbled (Rmb), another “pattern” allele, also produced ...
متن کاملOxidation of Secondary Methyl Ethers to Ketones
We present a mild way of converting secondary methyl ethers into ketones using calcium hypochlorite in aqueous acetonitrile with acetic acid as activator. The reaction is compatible with various oxygen- and nitrogen-containing functional groups and afforded the corresponding ketones in up to 98% yield. The use of this methodology could expand the application of the methyl group as a useful prot...
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The taxonomy of fire ants has been plagued by difficulties in recognizing species on the basis of morphological characters. We surveyed allozyme markers and sequences of the mtDNA COI gene in several closely related nominal species from two areas of sympatry in the native ranges to learn whether the morphology-based delimitation of these species is supported by genetic data. We found that Solen...
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ژورنال
عنوان ژورنال: New Zealand Journal of Botany
سال: 1981
ISSN: 0028-825X,1175-8643
DOI: 10.1080/0028825x.1981.10425117