Renhart Jemi
Verified email at for.upr.ac.id
Department of Forestry, Faculty of Agriculture
University Palangka Raya
EDUCATION
Universitas Mulawarman: Samarinda, East Kalimantan, Indonesia
Master of Agriculture (Forestry Science)
Institut Pertanian Bogor: Bogor, Jawa Barat, Indonesia
Doctor (Forest Product, Fac. of Forestry)
RESEARCH INTERESTS
Research interests, especially in the fields of natural chemistry and forest product technology
Scopus Publications
Scholar Citations
Scholar h-index
Scopus Publications
E I Purnawan, R Jemi, H Kasim, L A Uthan, J Regalino, and A Hamidi
IOP Conference Series: Earth and Environmental Science, ISSN: 17551307, eISSN: 17551315, Volume: 1053, Published: 2022
IOP Publishing
Abstract This study investigates the selection agroforestry tree species based on a participatory approach and an ecological approach in Humbang Raya village and Tumbang Mantuhe village. This study method was carried out using a participatory approach through Focus Group Discussion (FGD) activities and an ecological approach through the identification of tree species in open and closed forests. The results of the FGD selected tree species in Humbang Raya village as many as 17 tree species and in Tumbang Mantuhe village as many as five tree species. The results of the identification of tree species in Humbang Raya village in closed forest amounted to 34 tree species, while in open forest there were 10 tree species. In Tumbang Mantuhe village in closed forest there are 29 species of trees and open forest five species of trees. It was concluded that the selected tree species to be planted on agroforestry land in Humbang Raya village and Tumbang Mantuhe village each had 4 tree species.
E I Purnawan, R Jemi, H Kasim, L A Uthan, J Regalino, and A Hamidi
IOP Conference Series: Earth and Environmental Science, ISSN: 17551307, eISSN: 17551315, Volume: 886, Published: 17 November 2021
IOP Publishing
Abstract A rubber agroforest system is a form of land use that considers ecological and economic aspects that are still maintained by the people of Tumbang Mantuhe Village. This study aims to identify and analyze the diversity of vegetation in the agroforest system in Tumbang Mantuhe Village, Gunung Mas Regency, Central Kalimantan. This research uses purposive sampling and the vegetation analysis method. The results showed that the species of vegetation in the rubber agroforest system amounted to 29 species in 23 families. At the seedling level, it is dominated by Macaranga sp. and Xylopia ferruginea; the sapling level is dominated by H. brasiliensis and Syzygium tawahense; the pole level is dominated by Deplanchea bancana and Xylopia ferruginea; at the tree, the level is dominated by H. brasiliensis and Lithocarpus sp. At the seedling, sapling, pole, and tree levels, the diversity values were moderate and the species richness values were moderate to high, and the species distribution was even (stable). The H. brasiliensis agroforest system with various trees in it is a characteristic of local wisdom that the people of Tumbang Mantuhe Village have applied from generation to generation, which provides a balance between ecology and economy.
Renhart Jemi, Sumiati Simanullang, Sarinah, Nuwa, Gimson Luhan, and Desy Natalia Koroh
IOP Conference Series: Materials Science and Engineering, ISSN: 17578981, eISSN: 1757899X, Volume: 1011, Published: 4 January 2021
IOP Publishing
Renhart Jemi, Nuwa, and Elitha Octaviani
AIP Conference Proceedings, ISSN: 0094243X, eISSN: 15517616, Volume: 2175, Published: 19 November 2019
AIP Publishing
Renhart Jemi, Ade Irma Barus, Nuwa, Sarinah, and Gimson Luhan
AIP Conference Proceedings, ISSN: 0094243X, eISSN: 15517616, Volume: 1904, Published: 27 November 2017
Author(s)
Ujung Atap is an herb that have distinctive odor on its leaves. The plant’s essential oil contains bioactive compounds but has not been investigated its anti-fungal activity against Pleurotus ostreatus. Essential oil from Ujung Atap leaves is one environmentally friendly natural preservative. This study consisted of distillation Ujung Atap leaves with boiled method, determining the number of acid, essential oil ester, and anti-fungal activity against Pleurotus ostreatus. Analysis of the data to calculate anti-fungal activity used probit analysis method to determine the IC50. Results for the distillation of leaves Ujung Atap produce essential oil yield of 0.071% and the average yield of the acid number and the ester of essential oils Ujung Atap leaves are 5.24 and 12.15. Anti-fungal activity Pleurotus ostreatus at a concentration of 1000 µg/mL, 100 µg/mL, 75 µg/mL, 50 µg/mL and 100 µg/mL BA defunct or fungi was declared dead, while at a concentration of 25 µg/mL, 10 µg/mL and 5 µg/mL still occur inhibitory...