Milicia Excelsa Research Articles

Determination of cations and anions in the ashes of some medicinally used tropical woods

The ashes of some medicinally used tropical woods were characterised. These were Afzelia africana, Alstonia congensis, Antiaris africana, Terminalia ivorensis, Azadirachta indica, Ricinodendron heudelotti, Chlorophora excelsa and Daniellia ogea. The ashes were obtained by treating wood in a muffle furnace, after which the ashes dissolved in distilled water. The very alkaline solutions obtained were analysed for Na+, K+, Ca2+, Mg2+, Mn2+, Fe2+, Cu2+, Cl-, SO 4 2- and PO 4 3- . Due to wide medicinal application of these wood species experiments were made to determine the cations and anions which may be active ingredients in the compounds (drugs) used in the treatment of differet ailments.

Recent Calcite-Cemented Sandstone Generated by the Equatorial Tree Iroko (Chlorophora Excelsa), Daloa, Ivory Coast

In the region of Daloa, Ivory Coast, several Iroko trees ( Chlorophora excelsa , family of the Moraceae), a frequent species of the equatorial rain forest known for its calcareous excretions always related to wounds kept unhealed by insect activity, show an unusual lithogenetic aspect of this process. Between severely damaged roots, large-scale bleeding of the sap, after unsuccessful attempts to build crusts of fibrous carbonate over the wounds, has penetrated into the interstitial spaces of the adjacent granitic residual sand and cemented it by precipitation of calcium carbonate into large blocks of hard and massive calcite-cemented pure-quartz sandstone. The quartz and rare feldspar grains displayed a high amount of marginal corrosion by the cryptocrystalline calcite cement. The agents responsible for the severe damage to the trees cannot be determined with certainty but are assumed to be elephants, wild boars or jungle buffaloes. This recent sandstone demonstrates processes of intense corrosion of detrital quartz and feldspar grains and of general cementation both by calcite which have taken place at or near the surface before any decay, burial, overburden or compaction could occur and which, therefore, should be considered as geologically instantaneous.

Regeneration of Chlorophora Excelsa (Mvule) in Uganda in Relation to Soil-Root Conditions

(1955). Regeneration of Chlorophora Excelsa (Mvule) in Uganda in Relation to Soil-Root Conditions. The East African Agricultural Journal: Vol. 21, No. 1, pp. 34-41.

Action of Systemic Insecticides on the Psyllid Phytolyma lata

THE psyllid Phytolyma lata Walk, has been known for many years as a serious pest of the valuable timber tree Chlorophora excelsa (also known by the vernacular names iroko, mvule and odum) in tropical Africa. The insect attacks the new shoots on young trees, causing heavy gall formation, suppression of the terminal bud and severe stunting of the tree. Seedlings in nursery beds are very liable to damage, and many succumb to repeated attacks.

Chlorophorin, a Constituent of Iroko, the Timber of Chlorophora excelsa

IROKO, the decay-resistant timber of a tropical African tree, Chlorophora excelsa, contains 2–8 per cent of an amorphous phenol, m.p. 157–159°, which can be extracted by ether and has not hitherto been isolated. We propose for this substance the name 'chlorophorin' ; analyses of the crystalline tetraacetate, tetramethyl and tetraethyl ethers agree most closely with the molecular formula C25H30O4.

663. The phenolic resin of the wood of Chlorophora excelsa(Benth. and Hook f.)

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