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All Journal Indonesian Journal of Forestry Research Jurnal Farmasi Galenika (Galenika Journal of Pharmacy) JRTI (Jurnal Riset Tindakan Indonesia)
Arbainsyah Arbainsyah
Eco Integrated Indonesia-Samboja, East Kalimantan
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Health Professions Immunology & microbiology Medicine & Pharmacology

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DIVERSITY OF PLANT COMMUNITIES IN SECONDARY SUCCESSION OF IMPERATA GRASSLANDS OF EAST KALIMANTAN, INDONESIA Yassir, Ishak; Arbainsyah, Arbainsyah
Indonesian Journal of Forestry Research Vol 1, No 2 (2014): Indonesian Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/ijfr.2014.1.2.139-149

Abstract

Regeneration of Imperata grassland areas is becoming increasingly important, both to create new secondary forest and to recover the original biodiversity. We studied the diversity of plant communities in secondary succession of Imperata grasslands using 45 subplots of 9 linear transects (10 m x 100 m). Data was collected and all stems over 10 cm dbh were identified  , the Importance Values Index (IVI) for all trees were calculated, saplings and seedlings were counted  and analysed, and soil samples were taken and analysed. Results showed that  after more than 10 years of regeneration, 65 families were encountered consisting of 164 species, which were dominated by Vernonia arborea Buch.-Ham, Vitex pinnata L., Macaranga gigantea (Reichb.f. & Zoll.) Muell.Arg., Symplocos crassipes C.B. Clarke, Artocarpus odoratissimus Miq., and Bridelia glauca Blume. The effects of regeneration, from Imperata grassland to secondary forest, on soil were the strongest in the A-horizon where an increase in carbon, N content, and pH were observed. Our result shows that Imperata grasslands appear to be permanent because of frequent fires and human interferences and so far few efforts have been made to promote sustainable rehabilitation. If protected from fire and other disturbances, such as shifting cultivation, Imperata grassland will grow and develop into secondary forest.
Manajemen pembelajaran bahasa inggris untuk meningkatkan literasi berbahasa Arbainsyah, Arbainsyah; Wasliman, Iim; Dianawati, Eva
JRTI (Jurnal Riset Tindakan Indonesia) Vol 8, No 1 (2023): JRTI (Jurnal Riset Tindakan Indonesia)
Publisher : IICET (Indonesian Institute for Counseling, Education and Therapy)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (515.085 KB) | DOI: 10.29210/30032503000

Abstract

Manajemen pembelajaran bahasa inggris merupakan suatu hal yang penting untuk perlu diperhatikan karena menjadi bagian yang penting dalam proses pembelejaran bahasa inggris. Tujuan dari penelitian ini adalah untuk memperoleh informasi dan menganalisis tentang perencanaan, pengorganisasian, pelaksanaan, evaluasi, kendala dan solusi dalam pembelajaran bahasa Inggris siswa pada SMA Bina Banua Banjarmasin Kalimantan Selatan. Dalam penelitian ini digunakan penelitian deskriptif kualitatif yang dimaksudkan untuk memperoleh informasi mengenai Manajemen Pembelajaran Bahasa Inggris Untuk Meningkatkan Literasi Berbahasa Siswa SMA. Hasil penelitian ini meyimpulkan bahwa manajemen pembelajaran bahasa inggris untuk meningkatkan literasi berbahasa siswa SMA Bina Banua Banjarmasin sudah berjalan sesuai dengan aturan yang belaku meliputi aspek intrakurikuler yang berisi kegiatan perenanaan pembelajaran, pengorganisasian, pelaksanaan dan evaluasi pembelajaran.
Antioxidant and Antibacterial Activity of Yellow Wood (Coscinium fenestratum) Fruits Peel from East Kalimantan: Aktivitas Antioksidan dan Antibakteri Kulit Buah Kayu Kuning (Coscinium fenestratum) Asal Kalimantan Timur Kustiawan, Paula Mariana; Arbainsyah, Arbainsyah; Setiawan, Irfan Muris
Jurnal Farmasi Galenika (Galenika Journal of Pharmacy) (e-Journal) Vol. 7 No. 2 (2021): (October 2021)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24428744.2021.v7.i2.15640

Abstract

Background: Yellow wood (Coscinium fenestratum) is one of the typical forest plants of East Kalimantan. The hallmark of this plant is the roots, stems and the fruits pulp have a yellow color. There have been many studies on its use and potential in treating liver disease. However, there is limited research about the use of their fruits peel. Objectives: The purpose of this study was as an initial screening of the antioxidant and antibacterial activity from yellow wood (Coscinium fenestratum) fruits peel. Material and Methods: The yellow wood fruits peel was extracted using methanol solvent to obtain the MeOH extract of their fruits peel. The DPPH test was carried out to determined its antioxidant activity (25,50 and 100 ppm). The agar well difusion method was carried out to determined its antibacterial activity. Phytochemical tests are also carried out to determined the secondary metabolites of that fruits peel. Results: The results of the phytochemical test showed that the fruits peel contained alkaloids, flavonoids, carbohydrates, and tannins, but there were no terpenoids or steroids. The fruits peel has an antioxidant activity (58%) at 100 ppm concentration. While the antibacterial test showed strong inhibition at 100 ppm concentration on S. mutans, S. aureus, P. acne and E. coli bacteria. Conclusions: The fruits peel of the yellow wood has compounds that have strong antibacterial activity and medium antioxidant activity.
Co-Authors Dianawati, Eva Iim Wasliman Irfan Muris Setiawan Ishak Yassir Paula Mariana Kustiawan