Abstract We investigated the effect of ultrasonic treatment on Malas ( Homalium foetidum ) gas permeability and sound absorption coefficient using transfer function method. Results showed a longitudinal average Darcy constant 2.02 (standard deviation SD 0.72) for untreated wood 6.15 (SD 3.07) ultrasound-treated wood, increase 3.04 times. also determined coefficients in range 50 to 6.4 kHz NRC (...

Summary We present a synopsis and an identification key for the 13 species one subspecies of African genus Whitfieldia Hook. (Acanthaceae: Acanthoideae: Whitfieldieae). This work is based on observation analysis morphological data from herbarium specimens photographs species, study all relevant literature genus. latiflos C.B.Clarke ex Stapf Liberia reinstated as accepted full description illust...

This study evaluated the natural durability of seven imported hardwoods Bangkirai (Shorea laevis), Burckella (Burckella.), Ipe (Handroanthus.), Jarrah (Eucalyptus marginata.), Kempas (Koompassia malaccensi), Malas (Homalium foetidum) and Merbau (Instia) used for deck boards against decay fungi (Fomitopsis palustris, Gloeophyllum trabeum, Trametes versicolor, Irpex lacteus) subterranean termite ...