• Journal of Life Science
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• v.21 no.2
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• pp.165-175
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• 2011

This study investigates the effects of Psidium guajava L. leaf (Pg) extract, Lagerstroemia speciosa L. leaf (Ls) extract, and mixture A (Pg, Ls, Morus indica L. leaf, Pinus densiflora needles, Acanthopanax senticosus M. roots extract) on db/db mice. For four weeks, db/db mice were fed powdered extracts of Pg, Ls, and mixture A. Compared to the diabetic control, extracts of Pg, Ls and mixture A decreased body weight, glucose and insulin. The greatest decreases were caused by mixture A. These extracts decreased the levels of total cholesterol, triglyceride and free fatty acid compared to the diabetic control. The antihyperlipidemic effect of mixture A was the greatest. Mixture A also significantly decreased injuries of Langerhans' islets compared to the diabetic control. Mixture A showed a beneficial synergistic effect due to the supplementary pharmacological actions of the ingredients in contains, indicating that it improved hyperglycemia without the side effect of weight gain.

• Journal of the Korean Wood Science and Technology
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• v.43 no.2
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• pp.248-257
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• 2015

This research focused on the natural durability of twenty one lesser known tropical wood species planted in West Java, Indonesia against subterranean termite (Coptotermes curvignathus). It was observed that both heartwood and sapwood of Kiara payung (Filicium decipiens); heartwoods of Nangka (Arthocarpus heterophyllus), Mahoni (Swietenia macrophylla) and Simpur (Dillenia grandifolia); and sapwood of Bungur (Lagerstroemia speciosa) were rated as resistant (natural durability class II) according to Indonesian standard SNI 01.7207.2006 (BSN 2006). Both heartwood and sapwood of Salam (Syzigium polyanthum), Pasang (Lithocarpus sundaicus), Bisbul (Diospyros discolor), Rukam (Flacourtia rukam) and Trembesi (Samanea saman); heartwood of Puspa (Schima walichii), Bungur, Tanjung (Mimusops elangi) and Angsana (Pterocarpus indicus) were rated as moderately resistant (natural durability class III). Both heartwood and sapwood of Sungkai (Peronema canescens), Pine (Pinus merkusii), Mangium (Acacia mangium) and Afrika (Maesopsis eminii); sapwoods of Mahoni, Puspa and Tanjung were rated as poorly resistant (natural durability class IV). Both heartwood and sapwood of Agathis (Agathis dammara), Durian (Durio zibethinus), Ki sampang (Evodia latifolia) and Jabon (Anthocephalus cadamba); sapwoods of Nangka and Angsana were rated as very poorly resistant (natural durability class V). This reserach showed that woods with lower resistance against C. curvignathus attack (natural durability class IV and V) tend to have lower termite mortality values compared to woods with higher resistance against C. curvignathus attack (natural durability class II and III). Results of the study will provide some valuable information on termite resistance of twenty one lesser known tropical wood species planted in Indonesia.