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All Journal Jurnal Pendidikan Biologi Indonesia Scientific Contribution Oil and Gas
Agus M
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Environmental Science

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GERM PLASM DIVERSITY OF GROUNDNUT BASED ON THE CHARACTER OF MORPHOLOGY, RESULT, AND OIL CONTENT Try Zulchi; Hakim Kurniawan; Higa Afza; Husni P; Agus M; Ana Nurul
JPBI (Jurnal Pendidikan Biologi Indonesia) Vol. 2 No. 2 (2016): JULY
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jpbi.v2i2.3466

Abstract

Groundnut is one of the largest vegetable oil and has a good nutritional value. It could be used as an alternative source of food, industrial raw materials, and bioenergy. The main function of fats and oil in seeds reserves source of energy. This research aims to study the diversity of morphological, yield, and the oil content in groundnut germplasm. The planting of groundnut was conducted at the experimental station Cikeumeuh BB Biogen Bogor from July until December in 2013, with the germplasm of groundnut as much as 200 accessions. The characters identification is determined by the method of morphological characterization with Groundnut Descriptor from IPGRI. Analyze oil content of groundnut used soxhlets method at the Laboratory of Post-harvest Bogor. The results showed that germplasm groundnut have varied levels of diversity at characters. Relatively high morphological diversity founded the character of pod yield/plot, weight of pods/plant and number of immature pods. Groundnut oil content is range 33% to 47%. There are a real positive correlation between the number of pods to variable morphology, yield and oil content, but negatively correlation at weight of 100 seeds. Number of pods and number of branches is positively correlation with oil content of groundnut seeds. Cultivars groundnut that have the characters of promise could be used as national asset and the source of genes as a parent in the breeding program. Keywords: Diversity, Groundnut, Morphology, Oil Content
In Situ Stress and Stress Regime in the Onshore Part of the Northeast Java Basin Agus M; Ramdhan
Scientific Contributions Oil and Gas Vol. 44 No. 2 (2021): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

In situ stress is importance in the petroleum industry because it will significantly enhance our understanding of present-day deformation in a sedimentary basin. The Northeast Java Basin is an example of a tectonically active basin in Indonesia. However, the in situ stress in this basin is still little known. This study attempts to analyze the regional in situ stress (i.e., vertical stress, minimum and maximum horizontal stresses) magnitude and orientation, and stress regime in the onshore part of the Northeast Java Basin based on twelve wells data, consist of density log, direct/indirect pressure test, and leak-off test (LOT) data. The magnitude of vertical ( and minimum horizontal ( stresses were determined using density log and LOT data, respectively. Meanwhile, the orientation of maximum horizontal stress ( was determined using image log data, while its magnitude was determined based on pore pressure, mudweight, and the vertical and minimum horizontal stresses. The stress regime was simply analyzed based on the magnitude of in situ stress using Anderson’s faulting theory. The results show that the vertical stress ( ) in wells that experienced less erosion can be determined using the following equation: , where is in psi, and z is in ft. However, wells that experienced severe erosion have vertical stress gradients higher than one psi/ft ( . The minimum horizontal stress ( ) in the hydrostatic zone can be estimated as, while in the overpressured zone, . The maximum horizontal stress ( ) in the shallow and deep hydrostatic zones can be estimated using equations: and , respectively. While in the overpressured zone, . The orientation of is ~NE-SW, with a strike-slip faulting stress regime.
Co-Authors Ana Nurul Hakim Kurniawan Higa Afza Husni P Ramdhan Try Zulchi