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INDONESIA
Jurnal Ilmu Dasar
Published by Universitas Jember
ISSN : 24425613     EISSN : -     DOI : https://doi.org/10.19184/jid.v24i2.36657
Core Subject : Education, Engineering,
Control & Systems Engineering Mathematics
Jurnal ILMU DASAR (JID) is a national peer-reviewed and open access journal that publishes research papers encompasses all aspects of natural sciences including Mathematics, Physics, Chemistry and Biology. JID publishes 2 issues in 1 volume per year. First published, volume 1 issue 1, in January 2000 and avalaible in electronically since 2012 with ISSN 1411-5735 (Print) and avalaible in electronically since 2012 with ISSN 2442-5613 (online). Jurnal ILMU DASAR is accredited SINTA 3 by the Ministry of Education, Culture, Research, and Technology of the Republic of Indonesia (Kemendibukristek) No. 152/E/KPT/2023 (September 25, 2023), Ministry of Research, Technology and Higher Education of the Republic of Indonesia (RISTEKDIKTI), No. 200/M/KPT/2020 (December. 23, 2020). All accepted manuscripts will be published worldwide JID has been indexed in DOAJ, Dimension, OCLC WorldCat, PKP Index, Crossref, Google Scholar, Base, Garuda, and OneSearch. JID have been collaborated in KOBI-ID (Konsorsium Biologi Indonesia) and HKI (Himpunan Kimia Indonesia) since 2017.
Arjuna Subject : Matematika - Kontrol dan Optimasi
Articles 414 Documents
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Evaluation of Biofertilizer on Growth and Productivity of Solanum lycopersicum L. Febrionny, Princessa Nandita; Azzahra, Annisa; Salsabila, Syarifah; Agustin, Niken; Tamalia, Aqilla Kalyca; Anjani, Ajeng Distya; Junairiah; Fatimah
Jurnal ILMU DASAR Vol. 26 No. 2 (2025)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jid.v26i2.53696

Abstract

The increasing demand for tomatoes has prompted farmers to use chemical fertilizers, which can lead to soil degradation and reduced fertility. This study aims to determine the appropriate dose and frequency of biofertilizer application to enhance the growth and productivity of tomato plants (Solanum lycopersicum L.). The experiment was designed using a Completely Randomized Design (CRD) with 11 treatments, including both negative and positive controls. Three variations in biofertilizer doses were tested (5, 10, and 15 ml/plant), along with three different frequencies of application: once at one week after planting (1 WAP), twice (at 1 and 4 WAP), and three times (at 1, 4, and 8 WAP). Measured parameters included soil fertility (microbial population and functional microbial quality), plant growth (plant height, leaf count, stem diameter), and plant productivity (flower count). Quality of functional microbes were analyzed descriptively. Data of microbial population, plant growth and productivity were analyzed using Kruskal-Wallis and Mann-Whitney tests with a 5% significance level. The results showed significant differences in soil microbial populations and plant height between treatments, although no significant differences were observed in stem diameter, leaf number, or flower number. The treatment with 15 ml/plant applied three times (B15F3) exhibited the highest Relative Agronomic Efficiency (RAE) compared to other biofertilizer treatments (74.63%), but it was still lower than the control (chemical fertilizer). Therefore, higher doses and/or frequencies may be needed to further evaluate the effectiveness of the biofertilizer under test.
Using the Benthic Macroinvertebrates Species Diversity Index to Determine the Water Quality of Antirogo River, Jember Regency Wimbaningrum, Retno; Utami, Eva Tyas; Agustina, Rizka; Setiawan, Rendy
Jurnal ILMU DASAR Vol. 26 No. 2 (2025)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jid.v26i2.53698

Abstract

The Antirogo river, as one of the rivers across the Jember regency, East Java, plays an important role and is used for various activities such as agriculture, domestic, and industrial activities. These anthropogenic activities could affect the water quality of the river and the biota within. A group of river biota affected by anthropogenic activities is the benthic macroinvertebrates. Benthic macroinvertebrates can be used as bioindicators of river water quality. This study aimed to assess the water quality of the Antirogo River using the Shannon Wiener species diversity index (H') based on benthic macroinvertebrate data. Benthic macroinvertebrate sampling was conducted using a Surber net at three research stations. This research found 1703 individuals of benthic macroinvertebrates, which were classified into 16 families, 10 orders, and five classes. The most abundant family was the Heptageniidae, while the least abundant was the Simuliidae. The benthic macroinvertebrates' diversity index (H’) value was 1.67, with the evenness index (E) value at 0.60. Based on the diversity index (H’) value, the water quality in this river was lightly polluted with pollutants that can be in the form of solid materials and toxic compounds.
Partial Analysis of Probiotic Character of Lactic Acid Bacteria from the Intestines of Broilers Supplemented with Fish Protein Hydrolysate (FPH) Nashrullah, Shafa; Utami, Eva Tyas; Purniasari, Fina Yunita; Anggitasari, Dhanti Fatma; Utarti, Esti
Jurnal ILMU DASAR Vol. 26 No. 2 (2025)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jid.v26i2.53701

Abstract

This study aims to analyze partial characteristics of probiotics lactic acid bacteria (LAB) from broiler intestines supplemented with fish protein hydrolysate (FPH) 2% (v/w) in feed. A total of 17 LAB isolates were successfully isolated and characterized morphologically and biochemically (catalase test). The isolate showed diverse morphological and biochemical properties, obtained as many as seven isolates that met the partial characteristics of probiotics, namely U10, U11, U13, U16, U31, U33, and U37 which were Gram-positive and no endospores and catalase formations were found. The tolerance test for acid pH and NaCl performed on the seven BAL isolates showed a diverse survival rate with U11 showing the highest tolerance at pH 2 (11.4%) and NaCl concentration up to 8% (32.4%). These findings highlight seven LAB isolates with partial probiotic properties, providing new insights into the development of probiotic candidates from broiler guts to improve gastrointestinal health and productivity.
Production and Characterization od Xylanase from Actinomyces ATG 70 Using CornCob Xylan Substrate Farrennina, Tasya Preira; Putri, Amelia Fahreza; Arimurti, Sattya; Winarsa, Rudju; Utarti, Esti
Jurnal ILMU DASAR Vol. 26 No. 2 (2025)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jid.v26i2.53702

Abstract

Xilan is a polysaccharide that can be used as a substrate for producing xylanase. Xylan can be obtained from processing xylan-rich agricultural waste such as corn cobs, which contain 12.4% xylan. Xilan can be hydrolyzed into xylose and xylooligosaccharide (XOS) using the enzyme Xilanase. Actinomycetes have dominant xylanolytic species, Actinomyces ATG 70 has semi-qualitative xylanolytic ability with an enzyme activity index of 3.21±0.55 in xylan media. This study was conducted by extracting xylan from corn cobs, rejuvenating Actinomyces ATG 70, preparing the inoculum, creating a standard curve, producing xylanase with pH optimization of the medium, testing xylanase activity, characterizing the pH and temperature of crude xylanase, and identifying the morphology and biochemical characteristics of Actinomyces ATG 70. Optimization of the pH of the xylanase production medium was achieved at pH 8, with xylanase activity of 10.07±0.13 U/mL. The crude xylanase was characterized for pH and temperature effects, and the optimal pH for crude xylanase was found to be pH 6 with xylanase activity of 7.64±0.66 U/mL, and the optimal temperature was 50°C with xylanase activity of 11.17±0.33 U/mL. The identification results showed that Actinomyces ATG 70 belongs to Gram-positive bacteria, with a positive catalase test, white colonies, cream-colored aerial mycelium, and cream-colored pigmentation. The spore structure consists of long chains of conidia, streptococcus-shaped cells, and can form aerial mycelium, thus the isolate belongs to the genus Streptomyces.

Page 42 of 42 | Total Record : 414

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