Journal of Science and Application Technology (JSAT - Institut Teknologi Sumatera)
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Identifikasi Fase Pertumbuhan Makroskopis dan Ciri Mikroskopis Jamur Leucoagaricus sp.
No full textIndonesia, with its tropical climate, harbors a rich diversity of macroscopic fungi, including wild mushrooms that thrive in various regions, one of which is the Oil Palm Forest area of IPB University, Dramaga. This study aimed to identify the macroscopic growth stages and microscopic characteristics of Leucoagaricus sp. found in the Oil Palm Forest of IPB University, Dramaga. The species was observed to grow in a humid environment, exhibiting three distinct fruiting body growth stages with characteristic coloration corresponding to each stage, and microscopic features including septate hyphae and basidiospores. The development of Leucoagaricus sp. is influenced by environmental factors and ecological interactions. Furthermore, Leucoagaricus sp. possesses therapeutic potential as a natural antimicrobial and antioxidant. This study highlights the importance of conserving and exploring wild fungi as valuable biological resources
Analgetic effectiveness of fenugreek seed extract (Trigonella foenum-graecum L.) in acetic acid-induced male ddY strain mice
Full text linkPain represents a significant health challenge, with current nonsteroidal anti-inflammatory drugs (NSAIDs) carrying hepatotoxicity risks that necessitate safer alternatives. This study evaluated the analgesic activity of fenugreek (Trigonella foenum-graecum L.) seed extract using the acetic acid-induced writhing test in male ddY strain mice. Twenty-five mice were randomly allocated into five groups (n=5): negative control (1% Na-CMC), positive control (diclofenac sodium 50 mg/kg), and three fenugreek extract groups (200, 400, and 600 mg/kg). Pain was induced by intraperitoneal injection of 1% acetic acid, and writhing episodes were counted for 180 minutes. Data were analyzed using one-way ANOVA with Tukey's post-hoc test. All fenugreek doses significantly reduced writhing compared to negative control (p < 0.05). The extract demonstrated dose-dependent analgesic activity, with protection rates of 30.8%, 35.9%, and 41.0% for 200, 400, and 600 mg/kg doses, respectively. The highest dose (600 mg/kg) achieved 71% of diclofenac's analgesic efficacy (46.2% protection). Phytochemical screening confirmed the presence of alkaloids, flavonoids, saponins, steroids, tannins, and polyphenols. These findings suggest fenugreek seed extract possesses significant analgesic properties and represents a promising natural alternative for pain management
Sol-gel synthesis and characterization of iron- and nitrogen-doped titanium dioxide (TiO2) photocatalysts for enhanced rhodamine B degradation
Full text linkRhodamine B is a carcinogenic synthetic dye extensively used in textile and food industries, requiring effective removal from wastewater. Conventional titanium dioxide (TiO₂) photocatalysts demonstrate limited effectiveness under solar irradiation due to ultraviolet light activation requirements. This study evaluated strategic modification of TiO₂ electronic structure through low-concentration iron and nitrogen doping to enhance visible-light photocatalytic performance for rhodamine B degradation. Nanoscale TiO₂ materials were synthesized using sol-gel methodology and doped with iron and nitrogen precursors. Comprehensive characterization employed X-ray diffraction, ultraviolet-visible spectroscopy, and scanning electron microscopy to evaluate structural, optical, and morphological properties. Structural analysis confirmed preservation of anatase crystalline phase with 12.94 nanometer average crystallite size. Optical characterization revealed bandgap modifications from 3.27 eV for pure TiO₂ to 2.85 eV for iron-doped and 3.25 eV for nitrogen-doped samples. Nitrogen-doped TiO₂ achieved superior rhodamine B degradation efficiencies of 94.16% under ultraviolet irradiation and 83.34% under visible light, significantly outperforming pure and iron-doped materials. Enhanced performance resulted from optimized charge carrier dynamics balancing improved light harvesting with reduced electron-hole recombination. These findings establish a practical approach for developing cost-effective, solar-responsive photocatalysts for sustainable wastewater treatment applications
Kepadatan dan Keanekaragaman Avifauna di Taman Hutan Raya (Tahura) Banten: Analisis dengan Metode Point Count
No full textBirds play a crucial ecological role in maintaining forest ecosystem balance. However, environmental changes and anthropogenic pressures can affect bird population density and diversity in a given area. This study aims to identify the population density and diversity of birds in Banten Grand Forest Park. Data collection was conducted on June 22–23, 2024, using the Point Count method at five observation points within the Tahura Banten area. Observations were carried out in the morning (06:00–10:00 WIB) and in the afternoon (15:00–18:00 WIB). Population density was analyzed using the formula D = N/A, while bird diversity was assessed using the Shannon-Wiener Index. The results recorded 95 individual birds, classified into 25 species and 16 families. The Black-capped Babbler (Pellorneum capistratum) and the Common Iora (Aegithina tiphia) were the species with the highest density, reaching 2.55 individuals per hectare. The Shannon-Wiener Index calculation yielded a value of H’ = 3.03, indicating a high level of species diversity in the study area. These findings suggest that Tahura Banten remains an important habitat for various bird species. This study highlights the importance of forest ecosystem conservation in Banten Grand Forest Park to ensure the sustainability of bird populations and biodiversity in the region.
Keywords: Population density, bird diversity, Point Count, Tahura Banten, conservatio
ANALISIS HUBUNGAN ANTARA ZONA IKLIM LOKAL DAN SUHU PERMUKAAN LAHAN DI KOTA MAKASSAR
Full text linkThe rapid expansion of built-up areas in Makassar City has led to an increase in Land Surface Temperature (LST) and intensified the Urban Heat Island (UHI) phenomenon. This study aims to analyze the relationship between Local Climate Zones (LCZ) and surface temperature distribution across three districts: Tallo, Panakkukang, and Manggala. The methods involved rule-based LCZ classification using Sentinel-2 imagery and high-resolution (10-meter) LST prediction through a Random Forest model based on Landsat 8 and Sentinel-2 data, processed in Google Earth Engine. The results indicate that built-up zones such as compact low-rise and sparsely built areas exhibit significantly higher surface temperatures compared to vegetated and water zones. These findings confirm that the spatial distribution of LCZs strongly influences urban thermal variation and highlight the importance of climate-responsive urban planning through increased green spaces and water body preservation to mitigate localized heating in Makassar City
KOMUNIKASI DAN ADVOKASI DALAM MEMBANGUN KOMITMEN PEMBANGUNAN PERKOTAAN BERKELANJUTAN MELALUI MULTI-STAKEHOLDER PARTNERSHIP DI PROVINSI LAMPUNG
No full textSustainable urban development can support the achievement of the Sustainable Development Goals (SDGs), particularly Goal 11, and can be optimized through multi-stakeholder collaboration. This paper aims to (1) Raise awareness among various parties about the importance of collaboration for sustainable cities and communities; (2) Advocate for active support from pentahelix stakeholders (government, private sector, academia, community, and media) through the principles of Multi-Stakeholder Partnerships (MSP); and (3) Strengthen institutional commitment to collaborative governance in achieving SDG 11 in Lampung Province. The research employs a descriptive qualitative method to examine the dynamics of communication and advocacy in cross-sectoral collaborative processes. Data collection was conducted through a series of audience meetings with various stakeholders, including government institutions, academia, civil society organizations, local communities, and the media. The findings conclude that the success of building sustainable cities and communities largely depends on strategic communication and systematic, participatory advocacy processes. The multi-stakeholder partnership (MSP) approach involving the pentahelix elements—government, academia, community, media, and the private sector—has proven to provide an inclusive and practical framework for collaboration. However, realizing sustainable urban development in Lampung Province still faces significant challenges, particularly rgarding slum settlement issues that require special attention
PENGARUH PEMBERIAN KOMBINASI EKSTRAK ALANG-ALANG (Imperata cylindrica L.) DAN EKSTRAK BABADOTAN (Ageratum conyzoides L.) TERHADAP PERTUMBUHAN GULMA Digitaria sanguinalis L.
Full text linkGulma merupakan bagian dari organisme pengganggu tanaman (OPT), yang memiliki dampak signifikan terhadap penurunan produksi tanaman. Penelitian ini dilakukan untuk mengetahui pengaruh pemberian kombinasi ekstrak alang-alang (Imperata cylindrica L.) dan ekstrak babadotan (Ageratum conyzoides L.) serta menentukan konsentrasi kombinasi ekstrak yang paling efektif dalam menekan pertumbuhan gulma Digitaria sanguinalis L. Penelitian ini merupakan penelitian eksperimental yang menggunakan Rancangan Acak Lengkap (RAL). Jenis ekstrak yang digunakan berasal dari dua jenis tumbuhan yaitu ekstrak alang-alang dan ekstrak babadotan dengan 7 perlakuan K+ (100% herbisida komersil Promoquat 276 SL), K- (100 % air), P1 (75% Alang-alang + 25% babadotan), P2 (50 % alang-alang + 50 % babadotan), P3 (25 % alang-alang + 75 % babadotan), P4 (100 % alang-alang), dan P5 (100 % babadotan) dengan 4 kali pengulangan. Hasil perlakuan menunjukkan bahwa kombinasi ekstrak alang-alang dan babadotan P3 (25% alang-alang + 75% babadotan) berpengaruh secara signifikan dalam menghambat pertumbuhan gulma pada parameter tinggi (10.500 cm), jumlah daun (2.25), bobot basah (0.004825 g) dan bobot kering (0.001900 g). Senyawa alelokimia yang terdapat dalam ekstrak berkontribusi terhadap penghambatan pertumbuhan gulma, sehingga kombinasi ekstrak alang-alang dan babadotan dapat dijadikan alternatif pengendalian gulma yang ramah lingkungan
Quantitative Profiling of Total Flavonoid Content in Cassava Leaf (Manihot esculenta Crantz) Varieties and Isolation of Flavonoid Compounds from a High-Flavonoid Variety
Full text linkCassava (Manihot esculenta Crantz) is widely utilized across Indonesia as both a staple food and a traditional medicinal resource, and its leaves are known to contain bioactive secondary metabolites such as flavonoids. This study aimed to quantify the total flavonoid content in several cassava leaf varieties and to isolate a flavonoid compound from the variety with the highest flavonoid content. Total flavonoid content was determined using UV-Visible spectrophotometry. The isolation of flavonoid compounds was carried out using vacuum liquid chromatography (VLC) and column chromatography (CC), with thin-layer chromatography (TLC) employed to monitor the separation results. The total flavonoid content of the Gajah, UJ-3 (Thailand), UJ-5 (Katsesart), Cimanggu dan Kaspro varieties were found to be 1.029 ± 0.003 mgQE/g, 0.746 ± 0.006 mgQE/g, 0.970 ± 0.009 mgQE/g, 0.936 ± 0.004 mgQE/g and 1.220 ± 0.003 mgQE/g, respectively. The Kaspro variety exhibited the highest flavonoid content. Isolation and characterization of the flavonoid from Kaspro leaves yielded a yellowish powder with absorption maxima at 269 nm (Band II) and 334 nm (Band I). Further analysis using shift reagents identified the isolated compound as apigenin, a member of the flavone group
Pemanfaatan Limbah Botol Plastik sebagai Media Tanam Sayuran dengan Metode Irigasi Kapiler
No full textPengelolaan sampah yang baik dan benar merupakan salah satu kunci dalam menjaga kelestarian lingkungan hidup. Semua pihak, pemerintah maupun masyarakat harus berperan aktif dalam mengurangi produksi sampah dan mengelola sampah sesuai dengan ketentuan yang berlaku. Tingkat pendidikan yang relatif rendah serta tidak tersedianya sarana dan prasarana yang memadai dalam pengelolaan sampah menimbulkan degradasi lingkungan. Pelatihan atau transfer ilmu pengetahuan kepada masyarakat sangat diperlukan untuk meningkatkan kepedulian dan wawasan lingkungan. Pengelolaan sampah harus dimulai dari lingkungan terkecil yaitu rumah tangga. Oleh sebab itu, pelatihan pemilahan sampah organik, anorganik, B3 dan pemanfaatan limbah botol plastik sebagai media tanam sayuran dengan metode irigasi kapiler dilaksanakan untuk menambah pemahaman masyarakat mengenai pengelolaan sampah. Mitra kegiatan pengabdian masyarakat adalah warga Desa Banjaran, Kecamatan Padang Cermin Kabupaten pesawaran, Lampung dengan peserta pelatihan umumnya adalah ibu rumah tangga dan petani. Kegiatan pengabdian kepada masyarakat yang dilaksanakan dapat meningkatkan pemahaman masyarakat mengenai pengelolaan sampah dan pemanfaatan limbah botol plastik sebagai media tanam sayuran dengan metode irigasi kapiler. Hal ini dibuktikan dengan hasil pre-test dan post-test yang dilaksanakan. Selain itu, warga juga menunjukkan inisiatif dan antusiasme yang baik selama mengikuti pelatihan yang menunjukkan bahwa masyarakat sangat terbuka, kooperatif dan menyambut baik kegiatan pengabdian masyarakat yang dilaksanakan