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All Journal Jurnal Teknik Sipil AL-HAYAT: Journal of Biology and Applied Biology ULIN: Jurnal Hutan Tropis Jurnal Pengabdian kepada Masyarakat Nusantara Indigenous Biologi
Dina Tiara Kusumawardhani
Politeknik Pertanian Negeri Kupang
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Environmental Science Social Sciences

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Model Pendugaan Volume Tegakan Jati (Tectona grandis Linn.F) di Hutan Produksi Wemata Unit Pelaksana Teknis Daerah Kesatuan Pengelolaan Hutan Wilayah Kabupaten Belu Aah Ahmad Almulqu; Meilyn Renny Pathibang; Clara Maria Ximenes; Flora Evalina Kleruk; Yudisthira A.N.Rua Ora; Adrin Adrin; Fransiskus X Dako; Ni Kade Ayu D Aryani; Dina Tiara Kusumawardhani; Rinaldo Davinsy
ULIN: Jurnal Hutan Tropis Vol 7, No 1 (2023)
Publisher : Fakultas Kehutanan Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32522/ujht.v7i1.10391

Abstract

Pendugaan model tegakan jati (Tectona grandis Linn.f) di kawasan hutan produksi Wemata dilakukan pada 150 pohon contoh, dimana sebanyak 90 pohon menjadi pohon model dan 60 pohon dijadikan dasar untuk memvalidasi model yang telah disusun. Tujuan penelitian ini adalah untuk menentukan potensi tegakan jati (Tectona grandis Linn.f) berdasarkan model terbaik yang terpilih. Hasil penelitian menunjukkan bahwa potensi tegakan jati seluas 154, 741 ha sebanyak 26.259,4 m3 – 27.420,1 m3. Penentuan model terbaik berdasarkan nilai koefisien determinasi (R²), bias (SEE), dan validasi model berdasarkan nilai rata-rata deviasi (SR), deviasi aggregate (SA), root mean square of deviation (RMSE) dan bias (e). model yang terbaik berdasarkan kriteria-kriteria tersebut adalah V = -0.17 + 0.865 D2T (R² = 98.1 %), SEE = 0.095, SR = 0.436%, SA = 0.18%, RMSE = 0.78 dan e = 0.33. dengan potensi tegakan jati (Tectona grandis Linn.f), sebesar 36.001,017m3- 37.741,329 m3
Hubungan Karakteristik dengan Perilaku Individu dalam Perencanaan Partisipatif Kegiatan Penerapan Iptek Masyarakat Program Studi Pengelolaan Hutan untuk Optimalisasi Pengelolaan Sumberdaya Lahan Di Kota Kupang Aah Ahmad Almulqu; Dina Tiara Kusumawardhani
Jurnal Pengabdian kepada Masyarakat Nusantara Vol. 4 No. 3 (2023): Jurnal Pengabdian kepada Masyarakat Nusantara (JPkMN)
Publisher : Cv. Utility Project Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Community service activities are basically given to overcome the problems faced by the community. Community service is carried out to convey an innovation so that it can help sustainably improve people’s welfare. A critical aspect of community service activities is planning. In planning, it is essential to characterize the individual participants to identify their needs and appropriate counseling methods. Data collection is done by census. The study results show that gender correlates not with behaviors but with education and income levels.
A Review of Termite for Sustainable Green Building Kusumawardhani, Dina Tiara; Almulqu, Aah Ahmad
Al-Hayat: Journal of Biology and Applied Biology Vol 7, No 1 (2024)
Publisher : Fakultas Sains dan Teknologi, UIN Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/ah.v7i1.20704

Abstract

Although 3106 termite species have been documented worldwide, little information is available on those in Indonesia. In this review, the Google Scholar search platform was used to obtain information on termite species. From the 34 reviewed sources, they were identified in 4 provinces across Indonesia. Among these sites, we found 106 termite species from the islands of Sumatera, Kalimantan, Sulawesi, and Java. The most predominant species in all regions were Macrotermes sp, Microtermes sp, and Coptotermes sp.
Dimensional Stability Test of Mahogany Wood by Heat Treatment Kusumawardhani, Dina Tiara
Al-Hayat: Journal of Biology and Applied Biology Vol. 7 No. 2 (2024)
Publisher : Fakultas Sains dan Teknologi, UIN Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/ah.v7i2.22225

Abstract

Mahogany wood (Swietenia macrophylla) is one of Indonesia's fast-growing commercial tree species. Its wood is widely used for construction because of its great potential in the timber industry. Mahogany wood has low dimensional stability and high hygroscopic properties. This study aims to improve the quality of mahogany wood in terms of dimensional stability with the heat treatment method. Samples of mahogany wood were heat treated with three-time levels, namely control, 3 hours, and 6 hours at 180 °C. The results showed that heat treatment at 180 °C for 6 hours had the best results for maintaining wood dimensions with a low increase in water content, increased specific gravity, low absorption ability, minor swelling of wood in three directions of wood, and the value of ASE is also common than 3 hours of treatment.
Model Estimasi Volume Tegakan Eucalyptus Urophylla di Hutan Lindung Lelogama, Nusa Tenggara Timur Pathibang, Meilyn Renny; Matatula, Jeriels; Almulqu, Aah Ahmad; Adrin, Adrin; Ora, Yudhistira; Ari, Maria Patrisia; Nufus, Mitha Rabiyatul; Kusumawardhani, Dina Tiara
ULIN: Jurnal Hutan Tropis Vol 9, No 2 (2025)
Publisher : Fakultas Kehutanan Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32522/ujht.v9i2.22377

Abstract

Penelitian ini bertujuan untuk menghitung potensi tegakan, mengembangkan model estimasi volume tegakan ampupu, dan menghitung potensi tegakan berdasarkan model terbaik. Model estimasi volume tegakan ampupu (Eucalyptus urophylla S.T. Blake) di kawasan Hutan Lindung Lelogama disusun berdasarkan 130 pohon contoh, 70 pohon sebagai pohon model, dan 60 pohon sebagai validasi model. Hasil penelitian menunjukkan bahwa potensi tegakan ampupu di Hutan Lindung Lelogama berkisar antara 41.133,28 m³ – 42.123,58 m³ dengan rata-rata volume per Ha = 269,02 m³. Model terbaik dalam pemodelan dipilih berdasarkan koefisien determinasi maksimum (R²), bias terkecil (SEE), dan validasi model berdasarkan simpangan baku (SR), simpangan agregat (SA), akar kuadrat rata-rata simpangan baku dan bias (e). Berdasarkan model terbaik untuk estimasi volume ampupu adalah V=5,81D1,678T-0,032, dengan nilai R2 = 81,5%, SEE= 0,123, SR= 0,214%, SA=-0,267%, RMSE=-0,205 dan e=-0,183. Estimasi volume tegakan yang dihitung berdasarkan model terbaik (V=5,81D1,678T-0,032) berkisar antara 47.109,49 m³ - 48.190,96 m³ dengan volume rata-rata per hektar sebesar 307,94 m³.
PROFIL SENYAWA POLAR DAN SEMI POLAR DAUN TEMBELEKAN (LANTANA CAMARA) ASAL PULAU TIMOR Kapitan, Origenes Boy Kapitan; Kusumawardhani, Dina T.; Nitti, Fidelis; Kedjo, Gervasia Y
INDIGENOUS BIOLOGI : JURNAL PENDIDIKAN DAN SAINS BIOLOGI Vol 7 No 3 (2024): INDIGENOUS BIOLOGI : JURNAL PENDIDIKAN DAN SAINS BIOLOGI
Publisher : Prodi Pendidikan Biologi FKIP Universitas Kristen Artha Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33323/indigenous.v7i3.567

Abstract

Tembelekan (Lantana camara) is a shrub widely distributed in tropical regions, including the island of Timor. The arid and semi-arid tropical climate of Timor is believed to accumulate specific active chemical compounds different from other regions. Tembelekan leaves are processed into crude drugs and extracted using ethanol and ethyl acetate solvents. The preparation of ethanol and ethyl acetate extracts is carried out through the maceration method. The active chemical components of the ethanol and ethyl acetate extracts are characterized using FTIR and GC-MS. FTIR results indicate that the majority of functional groups present are similar due to the polar nature of the extracted compounds, with only a few differing functional groups between the two plant leaf extracts. GC-MS analysis reveals that the active chemical compounds in the ethanol extract of tembelekan leaves include hexadecanoic acid, phytol, 9,12,15-octadecatrienoic acid, 4,4-dimethyl-3-(3-methyl-3-buten-1-yliden)-2-methylidenbicyclo[4.1.0]heptane, and retinol. The active chemical compounds in the ethyl acetate extract of tembelekan leaves include tetradecanoic acid, 9,12,15-octadecatrienoic acid, squalene, 4,4-dimethyl-3-(3-methyl-3-buten-1-yliden)-2-methylidenbicyclo[4.1.0]heptane, and tricyclo[4.3.0.0(7,9)non-3-ene,2,2,5,5,8,8-hexamethyl-(1.alpha.,6.beta.,7.alpha.,9.alpha.). Metabolite secondary analysis of the plant using GC-MS shows that compounds in L. camara are dominated by derivatives of plant fatty acids (lipids) as an adaptation to the growing environment.
Sifat Mekanis Kayu Salam Pada Kondisi Layan Basah Kusumawardhani, Dina Tiara; Hidayatullah, Rizky; Bahtiar , Effendi Tri; Kapitan, Origenes Boy
Jurnal Teknik Sipil Vol 31 No 2 (2024): Jurnal Teknik Sipil - Edisi Agustus
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2024.31.2.7

Abstract

Abstract The abundance of salam wood on the island of Java is an attraction for its use as a construction material. However, there is not much scientific information regarding the mechanical properties of salam wood. This study aims to identify some of the main mechanical properties of salam wood with destructive tests referring to ASTM D143 including tests for static bending, compression parallel to the grain, compression perpendicular to the grain, and shear, as well as physical properties of wood including density, specific gravity, and moisture content. Salam wood with small test samples free of defects in wet and air dry service conditions referring to SNI 7973:2013. The stress value generated in each test by air dry wood has a greater value than that of wet wood. In general, the wet service factor of the test results is not in accordance with the SNI value, but the static bending test for both MOE and MOR produces values that are close to the values required by SNI. Wet service conditions have a significant effect on the strength value of wood.
Co-Authors Adrin Adrin Adrin, Adrin Almulqu, Aah Ahmad Ari, Maria Patrisia Bahtiar , Effendi Tri Clara Maria Ximenes Fidelis Nitti Flora Evalina Kleruk Fransiskus X Dako Hidayatullah, Rizky Jeriels Matatula, Jeriels Kapitan, Origenes Boy Kedjo, Gervasia Y Meilyn Renny Pathibang Ni Kade Ayu D Aryani Nufus, Mitha Rabiyatul Pathibang, Meilyn Renny Rinaldo Davinsy Yudhistira Ora, Yudhistira Yudisthira A.N.Rua Ora