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Aam Gunawan
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AL-ULUM: JURNAL SAINS DAN TEKNOLOGI
Published by Universitas Islam Kalimantan Muhammad Arsyad Al Banjari
ISSN : -     EISSN : 24774731     DOI : 10.31602
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Decision Sciences, Operations Research & Management Energy
Al Ulum: Jurnal Sains dan Teknologi = Al Ulum: Journal of Science and Technology (JST) is an international and open access journal with registered number ISSN 2477-4731 (Online). JST is a peer-reviewed journal published three times a year (April, August and December) by UPT Publication and Journal Management, Islamic University of Kalimantan. JST is intended to be the journal for publishing articles reporting the results of science and technology research. The JST invites manuscripts in the various topics of science and technology include natural sciences, engineering, computer science and technology, health and medical sciences, and agriculture.
Arjuna Subject : Umum - Umum
Articles 277 Documents
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HYDROGEOCHEMICAL CHARACTERISTICS AND SEAWATER INTRUSION OF SHALLOW GROUNDWATER IN MENGKIRAU, KEPULAUAN MERANTI, RIAU, INDONESIA Fitri Mairizki; Arief Yandra Putra; Catur Cahyaningsih; Siti Dhanty Rinalta; Titan Haffiyan
AL-ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 12 No 2 (2026)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v12i2.23803

Abstract

Shallow groundwater is the primary source of freshwater in coastal areas and small islands, but is highly vulnerable to seawater intrusion. This study aimed to determine the hydrogeochemical characteristics of shallow groundwater and the extent of seawater intrusion in the study area. Groundwater samples from 16 dug wells were analyzed for physicochemical properties, while seawater intrusion and hydrochemical facies were evaluated using the Revelle Index (RI) and Piper diagram, respectively. The results revealed groundwater ranging from freshwater in inland areas to brackish and saline water near the coast, with some samples exceeding domestic water quality standards. Elevated total dissolved solids (TDS), electrical conductivity (EC), salinity, iron (Fe), and manganese (Mn) were associated with reducing conditions, organic-rich sediments, and seawater mixing. The Revelle Index (RI) indicated moderate to high intrusion, particularly in coastal areas. Groundwater was dominated by the Na(K)-Cl(SO₄) facies, reflecting the combined influence of seawater intrusion and water-rock interaction.
BACTERIOSTATIC ACTIVITY OF Apium graveolens ETHANOLIC EXTRACT AGAINST Staphylococcus aureus AND Escherichia coli Putri Eka Sari; Mega Efrilia; Meutya Rinjani
AL-ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 12 No 2 (2026)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v12i2.23949

Abstract

Bacterial resistance to synthetic antibiotics has intensified the need for natural antimicrobial alternatives. This study evaluated the antibacterial activity of 96% ethanolic extract of celery stalk (Apium graveolens var. dulce) against Staphylococcus aureus and Escherichia coli using the broth dilution method. The extract was prepared by stepwise maceration in 96% ethanol at a 1:10 crude-to-solvent ratio (6 h with agitation, 18 h standing, followed by re-maceration 3×24 h). Concentrations tested were 3.125%, 6.25%, 12.50%, 25%, and 50%, with Ciprofloxacin (6.5 µg/µL) as positive control and 96% ethanol as negative control. Growth inhibition of S. aureus was detected at 50% (ΔAOD = −0.35), while inhibition of E. coli was observed at 25% (ΔAOD = −0.24) and 50% (ΔAOD = −0.093). Minimum bactericidal concentration testing confirmed bacteriostatic activity across all concentrations. These findings indicate that 96% ethanolic extract of celery stalk possesses concentration-dependent bacteriostatic potential against both bacterial species.
COST ANALYSIS OF RATS CONTROL IN SUPERIOR RICE CROPS IN BABIRIK DISTRICT, HULU SUNGAI UTARA REGENCY Budiman Budiman; Ilhamiyah Ilhamiyah; Fuzi Maulana Ash’ari
AL-ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 12 No 2 (2026)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v12i2.24092

Abstract

This study aims to find out the method of controlling rat pests on rice plants, compare costs between methods, and identify problems faced by farmers in the Asa Tamara Farmers Group, Babirik District, North Hulu Sungai Regency. The study used the purposive sampling method on 8 respondents who met certain criteria. The results of the study showed that the rat pest control methods used included Petrokum-type rodenticides, rat traps, and gropyokan. The most widely used method is the Petrokum rodenticide, while the least used is rat trap. The gropyokan method is known as the method that requires the highest cost. The total cost of control for an area of 13.5 hectares is IDR 16,975,000,- with implicit cost details of IDR 11,220,000 and explicit costs of IDR 5,755,000,-. The problems faced by farmers are lack of synchronization of control and planting time, low coordination between farmers, flooded and uneven land conditions, rat resistance to toxins, and lack of monitoring and delays in the implementation of control.
MOLECULAR DOCKING STUDY OF BENZOYLATED QUERCETIN DERIVATIVES AS POTENTIAL HER2 INHIBITORS FOR BREAST CANCER THERAPY Muhammad Rafii; Dwi Utami; Laela Hayu Nurani; Nurkhasanah Nurkhasanah
AL-ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 12 No 2 (2026)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v12i2.24284

Abstract

Human Epidermal Growth Factor Receptor 2 (HER2) overexpression contributes to breast cancer progression, while the effectiveness of lapatinib is often limited by drug resistance. This study evaluated the inhibitory potential of benzoylated quercetin derivatives against HER2 (PDB ID: 3PP0) using molecular docking. Docking validation yielded an RMSD of 0.902 Å, confirming the reliability of the protocol. Drug-likeness and pharmacokinetic properties were assessed using Lipinski’s Rule of Five and pkCSM-based ADMET prediction. Among the tested compounds, BCL23, BCL4, and BCL12 exhibited stronger binding affinities than lapatinib. They interacted with key HER2 active-site residues, including LEU726, VAL734, LEU785, THR798, CYS805, MET801, and LEU852. BCL23 satisfied all Lipinski criteria and showed favorable ADMET characteristics. These findings indicate that benzoylated quercetin derivatives, particularly BCL23, are promising HER2 inhibitors and potential candidates for breast cancer therapy. 
CULTIVATION ANALYSIS OF LONG BEAN (Vigna sinensis) AT PAK IMAM’S FARM IN SEI ASAM VILLAGE, KAPUAS HILIR DISTRICT, KAPUAS REGENCY Nurlaili Putri Utami; Ana Zuraida; Ilhamiyah Ilhamiyah
AL-ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 12 No 2 (2026)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v12i2.24955

Abstract

Agriculture remains a crucial sector for rural livelihoods, and long bean cultivation is one of the important commodities in Central Kalimantan. This research was conducted on Pak Imam’s land in Sei Asam Village, Kapuas Hilir District, to examine cultivation techniques, cost structure, and economic feasibility. Farming activities include seed selection, land preparation, planting, maintenance, fertilization, pest and disease control, harvesting, and post-harvest handling. Most practices follow recommended guidelines, with minor deviations in pruning and fertilization. Cost analysis integrates explicit and implicit expenses, providing a comprehensive view of resource allocation. The findings demonstrate that long bean farming generates positive returns, achieves profitability, and meets feasibility criteria based on the R/C ratio. Overall, the enterprise is economically viable and sustainable, with potential for improvement through more efficient input management.
EFFECT OF AGE AT FIRST MATING ON BIRTH WEIGHT, DAILY WEIGHT GAIN, AND WEANING WEIGHT IN ETAWA CROSSBRED (PE) GOAT KIDS M Sairi; Abd Malik; Fitriani Fitriani; Siti Erlina; Aam Gunawan
AL-ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 12 No 2 (2026)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v12i2.24956

Abstract

This study evaluated the effect of first mating age on birth weight, daily weight gain, and weaning weight in Etawa crossbred (PE) goat kids. Twenty female and four male goats were divided into four groups (5:1). Group P1 consisted of 7‑month‑old goats with an average body weight of 28.51 ± 1.32 kg, P2 were 9‑month‑old goats weighing 34.83 ± 2.73 kg, P3 were 11‑month‑old goats at 37.23 ± 3.58 kg, and P4 were 13‑month‑old goats at 40.29 ± 3.66 kg. All goats were raised under the same farm conditions. Parameters observed included birth weight, weight gain, and weaning weight. Results showed no significant differences (P > 0.5) among groups for birth weight, daily gain, or weaning weight. However, litter size differed significantly (P < 0.5) between treatments. In conclusion, first mating age (7, 9, 11, and 13 months) did not affect growth performance, but influenced litter size outcomes.
Front Matter Al Ulum: Journal of Science and Technology Vol. 12, No. 2, August 2026
AL-ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 12 No 2 (2026)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

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