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All Journal Jurnal Neutrino : jurnal fisika dan aplikasinya JURNAL FISIKA Biologica Samudra Quimica : Jurnal Kimia Sains dan Terapan Jurnal Masyarakat Berdikari dan Berkarya (MARDIKA)
Tisna Harmawan, Tisna
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Education Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Physics Social Sciences Veterinary

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KARAKTERISTIK ENERGI GAP (Eg) KOMPOSIT ZnO/KARBON AKTIF DARI TANDAN SAWIT(Elaeis guineensis Jack)) UNTUK APLIKASI SEL SURYA Wati, Rahma; Fadlly, Teuku Andi; Harmawan, Tisna
Jurnal Fisika Vol 9, No 2 (2019)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v9i2.23334

Abstract

Characteristics energy gap (Eg) composite ZnO/activated carbon from palm bunches (Elaeis guineensis Jack) for solar cell applications have been made. Zinc Oxide or ZnO is an n-type semiconductor having an Eg of 3.37 eV. This is an alternative material that attracts attention to be applied to solar cell devices. Commercial ZnO powder is used and activated carbon from Empty Fruit Bunch (TKS). The formation of activated carbon from the TKS was carried out by chemical activation and carbonization methods at 600 ° C for 1 hour. Composite ZnO / activated carbon from TKS will be done by the method of solid state. Variations in activated carbon from the TKS varied 0, 15, 30, 45 wt.%. The composite was tested by Uv-Vis to produce a graph (hvα) ½ vs hv (eV). The graph gives the characteristics of Eg ZnO / activated carbon composite by Tauc, s plot method. The results produced the lowest Eg in the ZnO / C 45 wt.% Composite, which was 3.20 eV. Increasing activated carbon in ZnO / activated carbon composites decreases the value of Eg. 
PENYULUHAN PENERAPAN PENGERING PORTABLE BUAH PINANG BERBASIS PANEL SURYA DI PEUNARON LAMA, ACEH TIMUR, INDONESIA Harmawan, Tisna; A. Mustaqin, Wendy; Andi Fadly, Teuku
Jurnal Masyarakat Berdikari dan Berkarya (Mardika) Vol 2 No 1 (2024): Jurnal Masyarakat Berdikari dan Berkarya (MARDIKA)
Publisher : Fakultas Teknik, Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/mardika.v2i1.9912

Abstract

Betel nut or pinang palm’s (Areca catechu L.) seed is one of the most important source of income for the people in Peunaron Lama Village, Peunaron Subdistrict, Aceh Timur Regency, Aceh Province, Indonesia. A training to a local group to introduce the function and use of a donated solar-panel powered drier was done in June 2022. The training program is a part of community engagement to increase the effectivity of betel nut drying. This aimed to increase the income for the local community in the village who depend much on the production of the dry betel nut seeds. The local people who participate in training are very interested and learn with enthusiast during the training and even ask for further modification of the equipment to adjust the specific needs. With the success training program, further evaluations are needed to improve the effectivity of solar-panel powered drier especially to the quality of the produced dry betel nut seeds.
Diversity of Endophytic Fungi in The Twigs and Roots of Baccaurea brevipes Hook.f. in Langsa Protected Forest, Aceh, Indonesia Wibowo, Sara Gustia; Navia, Zidni Ilman; Harmawan, Tisna; Dwitya, Yonadiah; Lestari, Ratna; Fadhliani, Fadhliani
JURNAL BIOLOGICA SAMUDRA Vol 7 No 1 (2025): Biologica Samudra
Publisher : Program Studi Biologi, Fakultas Teknik, Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/jbs.v7i1.10991

Abstract

The Baccaurea brevipes Hook.F. plant has been studied in the past and has the potential to be a therapeutic herb. The Tampoi plant (B. brevipes) has been used as a medication by the Acehnese to regulate menstruation and make urinating easier. In nature, endophytic fungi are widespread and can be easily found in plant tissue. Without infecting the host plant, the endophytes colonize the inter and intracellular spaces of the tissue. Endophytic fungi can create bioactive chemicals that may be similar to or distinct from those of their host plants and have pharmacological effects. However, no studies have been done on its endophytic fungus as a potential source for novel medication development. This study was done to look into endophytic fungi in Baccaurea's twigs and roots. The techniques employed in this study were endophytic fungi purification, identification of macroscopic and microscopic endophytic fungi, and endophytic fungi isolation. Five isolates were identified as a result of isolation and purification; they were designated as isolates BVA1, BVA2, BVA3, BVR1 and BVR2. The genera Neofusicocum sp., Colletotrichum sp., Mucor sp., Fusarium sp. and Schizophyllum sp. are assumed to be the kind of endophytic fungal isolates BVA1, BVA2, BVA3, BVR1 and BVR2.
Co-Authors A. Mustaqin, Wendy Andi Fadly, Teuku Dwitya, Yonadiah Fadhliani, Fadhliani Fadilla, Nunik Fadlly, Teuku Andi Fajri, Rahmatul Fajriani Fajriani Munazar Navia, Zidni Ilman Rahayu Rahma Wati Ratna Lestari Sara Gustia Wibowo, Sara Gustia Saragih, Yuni Sarma Silvia Ningsih Wahyu Poncowaty Yulida Amri