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All Journal BIOVALENTIA: Biological Research Journal Riset Sains dan Teknologi Kelautan
Damayanti, Rosa
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Medicine & Pharmacology

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MORPHOLOGICAL CHARACTERISTICS OF RICE VARIETIES ON IRON STRESS IN NUTRIENT CULTURE MEDIA Oktatora, Emilia; Agus Suwignyo, Rujito; Hasmeda, Mery; Damayanti, Rosa
BIOVALENTIA: Biological Research Journal Vol. 7 No. 1 (2021)
Publisher : Biology Department, Faculty of Mathematics and Natural Sciences, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (400.847 KB) | DOI: 10.24233/biov.7.1.2021.214

Abstract

Decreased rice productivity due to high iron concentrations especially in the vegetative phase, this causes the morphological character of rice to be affected until the metabolic process is disrupted. This study used 6 varieties, namely Batu Tegi, Inpara 9, Situ Patenggang, Inpara 8, Hawarabunar and Inpago 8, with iron concentrations of 0 and 250 ppm. The seeds were germinated for 3 days, then planted in Kimura B 10% nutrient culture media for 9 days, for 2 weeks then each week the media was changed to 100% Kimura B solution with the addition of 250 ppm iron concentration which was sampled every week until the 35th day. The results of the analysis of variance of the variables of plant height and root length showed that the combination Inpara 8-01 was the best combination and had a significant effect compared to other combinations with an average value of 61.31 cm and 30.77 cm. In the variable number of leaves the best average value was found in the combination of Batu Tegi-01 and Inpara 9-01 which had a significant effect compared to other treatments with an average value of 5.87 strands and 9.60 strands, respectively. On the stem dry weight variable, the combination of Hawarabunar-250 ppm Fe had a significant effect on other treatment combinations with the highest value of 0.17 g and the lowest value of treatment combination Inpara 9-250 ppm with a value of 0.08 g. Based on the results of treatment with 250 ppm Fe stress on plant morphological characters, the Hawarabunar variety had the best response in tolerating Fe stress, while the Batu Tegi variety was the lowest in tolerating Fe stress.
ANALISIS JALUR KRITIS PEKERJAAN BETON PRECAST LONG BEAM PADA PEKERJAAN DERMAGA DI MAKASSAR NEW PORT MENGGUNAKAN METODE PERT Damayanti, Rosa; Ashury, Ashury
Riset Sains dan Teknologi Kelautan Volume 5, Nomor 2, Tahun 2022
Publisher : Departemen Teknik Kelautan Fakultas Teknik Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/sensistek.v5i2.24751

Abstract

In a construction activity, there are several aspects that require proper management and processingrequired to have accuracy, determination, performance, accuracy, and safety to produce the appropriate endwith expectations. In a project, it is necessary to handle good scheduling management. Because ofTherefore, it needs to be handled with careful and thorough calculations so that no mistakes occur when the project is in progressjust lasts. The duration of a project does not have to add up the total time of the activity,but enough to find the critical path. Scheduling a project is an outcome factor that canprovide information about the schedule plan and progress of the project. In this case, the resource performance iscosts, personnel, equipment and materials, and project duration planning. When working on a project,problems often arise, namely the project implementation time does not match the agreed time. MatterThis will have a negative impact on the company. As a result, when a project is not well planned,Project implementation involves each other throughout a series of activities that will influence each other.
Co-Authors Ashury, Ashury Mery Hasmeda Oktatora, Emilia Rujito Agus Suwignyo