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Ichsan Luqmana Indra Putra
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INDONESIA
Journal of Biotechnology and Natural Science
Published by Universitas Ahmad Dahlan
ISSN : -     EISSN : 28082508     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology
Aims • The journal provides published articles devoted to all aspects of science in the field of biology and biotechnology advancement. Scopes • Biotechnology • Genetics • Microbiology • Botany • Zoology • Ecology • Environmental Biology • Molecular Biology
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 52 Documents
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The Effect of Variations in Sago Dregs Compost Dosage on the Growth and Productivity of Cucumber (Cucumis sativus L.) Plants on Marginal Land Musdalifah, Nurul; Rupang, Maya Sari; Wa Ode Asryanti Wida Malesi; Anwar; Mani Yusuf; Johana Anike Mendes; Rizki Al Khairi Barus
Journal of Biotechnology and Natural Science Vol. 5 No. 2 (2025): December
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/jbns.v5i2.14730

Abstract

This study aimed to determine the effect of applying sago waste compost on the growth and yield of cucumber (Cucumis sativus L.) cultivated in marginal land. The research was conducted using a Randomized Block Design (RBD) with one factor and five levels of compost dosage: B0 (0 tons/ha), B1 (5 tons/ha), B2 (10 tons/ha), B3 (15 tons/ha), and B4 (20 tons/ha), each replicated three times. Observed parameters included leaf number, stem diameter, plant dry weight, fruit number, fruit weight, and yield. Data were analyzed using ANOVA followed by the LSD test at a 5% significance level. The results showed that the application of sago waste compost had no significant effect on the number of leaves, stem diameter, and plant dry weight. However, the 20 tons/ha treatment (B4) significantly affected fruit weight and yield at 52 days after planting, producing the highest yield of 23.687 tons/ha. The effect was not significant at 45 and 59 days after planting. These results suggest that sago waste compost can enhance cucumber productivity during the fruit-filling phase, even though it has no significant effect on vegetative growth.).
Antioxidant Capacity and Phytochemical Profile of Jatropha curcas L. Leaf Extracts and Fractions Using the FRAP Method Sadik, Fahmi; Nur, Amran; S. Somadayo, Nur Asma; Hartina, Sitti
Journal of Biotechnology and Natural Science Vol. 5 No. 2 (2025): December
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/jbns.v5i2.14781

Abstract

This study explored the free radical scavenging potential of Jatropha curcas L. leaves, focusing on identifying active biochemical constituents and evaluating antioxidant efficacy through a series of extraction and chemical analysis procedures. Phytochemical screening confirmed the presence of several bioactive secondary metabolites, including alkaloids, saponins, triterpenoids, tannins, and flavonoids. In the Ferric Reducing Antioxidant Power (FRAP) assay, the ethyl-acetate fraction exhibited the highest level of antioxidant activity (9.19 ± 0.38 µmol TE/g), significantly higher than that of the ethanol extract (3.52 ± 0.71 µmol TE/g), as well as the aqueous and n-hexane fractions. This value corresponds to strong activity according to the TEAC classification, indicating that Jatropha curcas leaves are a promising source of natural antioxidants. The total phenolic content (TPC) was determined to be 6.78 ± 0.27% GAE, while the total flavonoid content (TFC) measured 1.35 ± 0.07% QE. These findings indicate that phenolic and flavonoid constituents play a primary role in the antioxidant activity of the extract. Variations significantly influenced the observed outcomes in the extraction methodology and solvent polarity. In summary, Jatropha curcas leaves possess substantial antioxidant potential, particularly within the ethyl-acetate fraction, supporting further development for nutraceutical and pharmaceutical applications.

Page 6 of 6 | Total Record : 52

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