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Geologi dan Studi Provenance Batupasir Formasi Bentang di Daerah Luyubakti dan Sekitarnya, Kecamatan Puspahiang, Kabupaten Tasikmalaya, Provinsi Jawa Barat Rizqi, Al Hussein Flowers; Ramadhan, Dimas; Pambudi, Setyo
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

The research area is administratively located in the Luyubakti area, Puspahiang District, Tasikmalaya Regency, West Java Province. Geographically located at the coordinates of 7°29'47.85” N - 7°24'56.43” LS and 108°4'33.32“ BT - 108°7'50.75” BT. The purpose of this research is to determine the geological conditions and composition of sandstones of the Bentang Formation in relation with the determination of provenance. The method used is mapping with the concept of lithostratigraphy and petrographic analysis in calculating the sedimentary mineral composition. The results of provenance analysis show that the sandstones of the Bentang Formation in the study area have three main sources of sediment supply in the Bentang Formation, namely Continental Block, Magmatic Arc, and Recycle Orogen.
Kemenerusan Endapan Batubara Berdasarkan Aspek Geologi dan Geomorfologi Formasi Lati di Area Binungan, Kabupaten Berau, Kalimantan Timur Martadi, Martadi; Pambudi, Setyo; Verdiansyah, Okki
Jurnal Locus Penelitian dan Pengabdian Vol. 4 No. 11 (2025): JURNAL LOCUS: Penelitian dan Pengabdian
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/locus.v4i11.5067

Abstract

Penelitian ini bertujuan untuk mengidentifikasi potensi kemenerusan endapan batubara di area Binungan, Kabupaten Berau, dengan menganalisis secara terintegrasi aspek geologi permukaan dan kenampakan geomorfologi. Metode penelitian menggunakan pendekatan kualitatif-interpretatif berdasarkan analisis data sekunder berupa peta geologi lokal, data sebaran singkapan, serta data citra satelit SRTM untuk analisis pola aliran sungai dan kelurusan morfologi. Hasil analisis menunjukkan adanya kontrol struktur geologi yang kuat terhadap topografi regional. Kehadiran pola aliran sungai jenis trellis di bagian selatan mengindikasikan adanya struktur perlipatan batuan sedimen. Analisis data citra satelit SRTM juga mengonfirmasi adanya kelurusan punggungan yang membentuk struktur sinklinorium regional berarah Timur Laut - Barat Daya. Pola sebaran singkapan batubara di lapangan konsisten dengan arah kelurusan struktur, menunjukkan tren kemenerusan ke arah selatan, keluar dari batas wilayah penelitian. Kesimpulan utama adalah terdapat indikasi kuat kemenerusan endapan batubara ke arah selatan yang dikontrol oleh struktur lipatan regional, memberikan dasar untuk eksplorasi lebih lanjut. Penelitian ini memperkuat pemahaman tentang hubungan struktur lipatan dan kelurusan morfologi dalam memprediksi kemenerusan lapisan batubara sebagai dasar eksplorasi berkelanjutan.
Solvent-Free Microwave Extraction: Phytochemistry and Bioactivities of Essential Oil from Stachytarpheta jamaicensis, L. in Banyuwangi Susanti, Yuni; Pambudi, Setyo; A'yun, Ayu Qurota; Aprilia, Melinda; Hanum, Nabila Salsabila; Armadan, Dwi Danang
Molekul Vol 20 No 3 (2025)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2025.20.3.16009

Abstract

ABSTRACT. Stachytarpheta jamaicensis, L. is a member of the Verbenaceae family. It is a medicinal plant easily found on vacant land and in rice fields in Banyuwangi. The present study is the first detail reported to examine the phytochemical compound and bioactivities of essential oil from S. jamaicensis L., using solvent-free microwave extraction (SFME). Forty chemical compounds were identified in the inflorescence and thirty in the leaves. β-caryophyllene, fulvoipolamiide, hexahydrofarnesyl acetone, t-phytol, neophytadiene, and squalene were identified in inflorescence oil. In contrast to the inflorescence, where these compounds were present in minor amounts, fulvoipolamiide, t-phytol, and squalene were the predominant components in the leaf oil. The IC50 values of leaves and inflorescence essential oils were 30.566 mg/mL and 52.510 mg/mL, respectively. Based on IC50 values, leaf essential oils have stronger antioxidant potential than inflorescence. Antibacterial and antifungal tests indicated that the leaf essential oil possesses greater antimicrobial efficacy than that of the inflorescence. These findings suggest that the essential oil of S. jamaicensis is a promising source of antioxidant, antibacterial, and antifungal agents, and holds potential for future pharmaceutical applications. Keywords: antibacterial; antifungal; antioxidant; medicinal plant