RNA-catalysed carbon-carbon bond formation

Article Abstract:

The RNA world hypothesis assumes that RNA molecules undertook the chemical processes that led to the appearance of life. This has led to interest in catalytic reactions involving oligonucleotides. Carbon-carbon bond formation has not yet been accomplished by RNA catalysis, although a successful application of in vitro selection to isolate pyridine-modified RNE molecules catalysing a Diels-Alder cycloaddition has been undertaken.

Research, Catalytic RNA

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Eclogite zenoliths in west African kimberlites as residues from Archaean granitoid crust formation

Article Abstract:

Geochemical research indicates that eclogite xenoliths in West African kimberlites originated from Archaean granitoid crust formation. Major-element chemical analysis of eclogite xenoliths from kimberlite pipes in Koidu, Sierra Leone, West Africa, is described. Evidence suggests that low-silica eclogite from whole rock samples comprise of the same basaltic parent rock components as granitoids of the West African craton.

Rocks, Igneous, Xenoliths, Kimberlite

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A new west African chimpanzee subspecies?

Article Abstract:

Data from the sequencing of a portion of the mitochondrial DNA control region from hairs of Nigerian chimpanzees living either side of the Niger River, suggests that there may be a new champanzee subspecies. The phylogeographic break between subspecies thought to have occurred was studied, and the differences in the mtDNA region could be the result of two alternative taxonomies.

Surgical and Medical Instrument Manufacturing, Surgical and medical instruments, DNA-Based Tests, Testing, Physiological aspects, DNA, DNA identification, Chimpanzees, Medical testing products

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