Abstract. Ramadhan R, Kristanti AN, Amirta R, Kusuma IW, Phuwapraisirisan P, Haqiqi MT, Saparwadi. 2019. Screening for potential antidiabetes and antioxidant activities of selected plants from East Kalimantan, Indonesia. Biodiversitas 20: 1820-1826. Ten selected plants in this study have been used traditionally in West Kutai, East Kalimantan as medicinal plants. This study aimed to screen and evaluate the in vitro antidiabetic and antioxidant activity of methanol extracts of selected plants from East Kalimantan. The antidiabetic activity was carried out by α-glucosidase inhibitory activity with maltose and sucrose as substrates while antioxidant activity was determined by free radicals scavenging activity against DPPH, ABTS and Nitric Oxide (NO). The results showed that Garcinia riedeliana extract had strong inhibitory activity with an IC50 value of 0.04 mg/mL followed by Shorea laevis, Pternandra azurea and Bridelia tomentosa with IC50 values of 0.12; 0.15 and 0.16 mg/mL in maltose respectively, while quercetin as positive control had an IC50 value of 0.08 mg/mL. G.riedeliana extract also showed good α-glucosidase inhibitory activity with an IC50 value of 0.23 mg/mL in sucrose as substrate. The results on antioxidant activity showed that all extracts have IC50 value against free radicals DPPH, ABTS, and nitric oxide. The most active extract as α-glucosidase inhibitory activity and antioxidant activity was G. riedeliana extract. These findings provide the scientific evidence that one species of medicinal plants from East Kalimantan might be potential as an antioxidant and α-glucosidase inhibitor.
Abstract. Amirta R, Haqiqi MT, Saparwadi, Septia E, Mujiasih D, Setiawan KA, Sekedang MA, Yuliansyah, Wijaya A, Setiyono B, Suwinarti W. 2019. Searching for potential wood biomass for green energy feedstock: A study in tropical swamp-peat forest of Kutai Kertanegara, Indonesia. Biodiversitas 20: 1516-1523. Recently, much attention has been focused on finding suitable plant species, from different forest ecosystems, having the potential to be used as sources of renewable energy. Most of such information was reported from the lowland forest area and only limited information is available regarding swamp-peat forest species, including their energy potency. Therefore, in this paper, plant diversity and energy potency of swamp-peat forest wood biomass were studied to reveal their potential as green energy feedstock. Physico-chemical characterization of wood biomass was performed using the American Society for Testing and Material (ASTM) protocols. Twenty-seven species of plants, consisting of 23 trees and 4 shrubs, belonging to 19 families were identified, amongst which Shorea balangeran had the highest importance value index (87.72%). The results showed that T. obovata exhibit the highest suitability to be used as energy feedstock indicated by the highest energy production of 4.60 MWh per ton of dry biomass, followed by L. indica (4.56 MWh/ton), D. excelsa (5.52 MWh/ton), F. rukam (4.20 MWh/ton), P. galeata (3.66 MWh/ton), S. caudatilimbum (3.61 MWh/ton), A. elmeri (3.59 MWh/ton), G. nervosa (3.49 MWh/ton) and G. bancana (3.42 MWh/ton). The high density of wood species correlated with the high value of energy potency. In contrast, the fast-growing tree and shrub species, such as K. hospita (1.76 MWh/ton), C. odorata (1.36 MWh/ton) and O. sumatrana (1.17 MWh/ton), showed lower energy potency. The most dominant plant species, S. balangeran gave only 2.96 MWh energy per ton of dry biomass and it was classified in the middle group of plant species suitable as green energy feedstock, along with other species, such as C. brachiata, C. rotundatus, P. javanicum, V. umbonata, L. speciosa, V. pinnata, and A. longifolius. Due to suitable energy properties, growth rate and also adaptability of this woody biomass, they can be exploited to support sustainable supply of biomass feedstock for the green electricity program in the study area.
Manajemen strategik mempunyai peran penting dalam peningkatan mutu pendidikan untuk itu Penelitian ini bertujuan untuk: 1) Untuk Mengetahui bagaimana implementasi Manajemen strategik dalam peningkatan mutu pendidikan SMA di kecamatan Janapria Tahun Pelajaran 2020/2021. 2) Untuk mendeskripsikan implikasi manajemen strategik bagi peningkatan mutu pendidikan SMA di Kecamatan Janapria Tahun Pelajaran 2020/2021. Penelitian ini merupakan penelitian dengan pendekatan kualitatif. Lokasi penelitian ini adalah SMAN 1 Janapria dan SMA NW Pendem Lombok Tengah. Pengumpulan data dilakukan melalui pengumpulan data observasi, wawancara mendalam, dan dokumentasi, sedangkan analisis data menggunakan tekhnik Milles & Huberman yaitu; pengumpulan data, reduksi data, penyajian data, danpenarikan kesimpulan, adapun untuk pengujian kebsahan data yaitu: Kredibilitas, keteralihan, ketergantungan, dan kepastian. Hasil penelitian ini menunjukkan 1) Perencanaan strategik SMAN 1 Janapria dan SMA NW Pendem meliputi empat kegiatan yaitu pengembangan visi, misi, dan tujuan, perencanaan jangka pendek, menengah dan panjang, identifikasi faktor internal dan eksternal, serta penyusunan strategi, 2) Pelaksanaan manajemen strategik di SMAN 1 Janapria dan SMA NW Pendem mancakup empat kegiatan yaitu menentukan kebijakan sekolah, memotivasi pendidik dan tenaga kependidikan, mengalokasikan sumber daya manusia, dan mengembangkan budaya strategi
The world of physics for scientists is no longer a materialist empirical world, but leads to efforts to realize spirituality through science to find the highest essence of science. There is a parallel in thought between Sufism and modern physics, where Sufism is based on direct understanding into the natural world of reality and modern physics is based on on observations of natural phenomena and scientific experiments which are interpreted and communicated through words which will become too abstract when close to reality which causes awareness of facts. Sufism has very many values in modern physics, but this may be unnoticed by the Muslim community. Whereas in Sufism which takes the verses of the Qur'an there are many things that are actually in modern physics quantized in the form of formulas, which we can take as the rationality of the highest existence of the Creator (Allah Subhaanahu Wa Ta'ala). so that modern physics can be used as an analysis of the verses of the Qur'an in demonstrating the essence of spirituality. This study uses the Library Research method with the main data source from the library in the form of books, articles, encyclopedias, dictionaries, and other written sources. To collect data through several stages, namely data inventory through collection of scientific works. The results of the research show that there are parallels between the thoughts in Sufism and modern physics regarding matter in this universe.
Modifications to energy management models have made them more adaptable and dynamic, with intelligent monitoring and control of energy production, distribution, storage, and consumption. However, the management paradigm has not yet been optimally implemented, given that fossil fuels account for 73% of all greenhouse gas (GHG) emissions in the energy sector. The purpose of this study was to find out the policy of management area in energy transition toward sustainable development. This was normative legal research employing the statutory approach, the fact approach, and the case approach. The results indicate that a global energy transition will have a positive effect on the future stability and development of economies worldwide. Therefore, the green investment promotion for Renewable energy has acquired prominence in recent years and is now at the forefront of global efforts to reform the energy sector. In addition, the harmonization of legislation and technical requirements is highlighted as a requirement for achieving this objective.
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