Purnomo

Ethnobotany of Bamboo in Sangirese, North Celebes

Advances in technology have encouraged the growth of a variety of biodiversity processing methods. These conditions encourage efforts to use natural resources more broadly. Ethnobotany can be used to document the local knowledge of the plants and their utilization. This study is aimed to describe the various forms of bamboo utilization by Sangirese. The method used was survey with purposive sampling. The data were analyzed descriptively based on exploration results and interviews with the people. The results showed there were 11 species of bamboo that are directly related to the life of local community in Sangirese, consisting of seven species of Bambusa , three species of Schizostachyum , and each one species of Dendrocalamus and Gigantochloa . Local community use bamboo for a variety of daily necessities; as building materials, handicraft, furniture, ceremonies, musical instruments, transportation, medicine, ornamental plants, as well as food. These exploration results are expected to complement the data of bamboo ethnobotany in Indonesia. Applicatively, this research is expected to be a reference in the national strategy of bamboo germplasm resource conservation.

PENGURANGAN INTENSITAS FLUKTUASI TEKANAN PADA PEMBESARAN MENDADAK ALIRAN UDARA – AIR SEARAH HORISONTAL DENGAN PENEMPATAN RING

This research aims to reduce the effect of pressure fluctuations intensity on the sudden expansion of two phase flow of air - water in the same direction with the horizontal placement of the ring. Measurements done by installing a differential pressure transducer device that is placed on pressure points before and after sudden expansion. Output voltage signal recorded by a digital storage osciloscope. Tests conducted on water discharge 0.000038 m 3 / s; 0.000078 m 3 / s; 0.000116 m 3 / s; 0.000154 m 3 / s; 0.000198 m 3 / s; 0.000244 m 3 / s; 0.000284 m 3 / s and air flow 0.000065 m 3 / s; 0.00013 m 3 / s; 0.000195 m 3 / s; 0.000255 m 3 / s; 0.00032 m 3 / s; 0.000385 m 3 / s; 0.00045 m 3 / s. Results showed that if the total mass flow rate increases the pressure drop increases. Installation of the ring can reduce the pressure fluctuations intensity, the most effective installation of the ring using the ring the same diameter. Flow path is generally slug and plug flow pattern.