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Eksakta : Berkala Ilmiah Bidang MIPA
Published by Universitas Negeri Padang
ISSN : -     EISSN : 25497464     DOI : https://doi.org/10.24036/eksakta/
Core Subject : Science, Education, Agriculture, Social, Engineering,
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering
Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) is an open access journal and peer-reviewed that publishes either original article or reviews. The journal is dedicated towards dissemination of knowledge related to the advancement in scientific research. The prestigious interdisciplinary editorial board reflects the diversity of subjects covered in this journal. Under the realm of science and technology, the coverage includes environmental science, pure and applied mathematics, agricultural research and engineering, biology, biotechnology, bioinformatics, Healthcare sciences (including clinical medicine, preventive medicine & public health), physics, biophysics, computer science, chemistry and bioengineering, to name a few. This Journal Is Published at 3 Month intervals on January-Marc, April-June, July-September and October-December
Arjuna Subject : Umum - Umum
Articles 327 Documents
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Metric Dimension of Maple Leaf Graph Welyyanti, Des; Mulyani Putri, Susi; Pratama Sandy, Ikhlas
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 27 No. 01 (2026): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol27-iss01/622

Abstract

This study determines the metric dimension of the Maple Leaf Graph (Mₚ) for 2 ≤ p ≤ 9 using the concepts of vertex distance and resolving sets. By analyzing the distance representation of each vertex with respect to a resolving set, the minimum resolving set is identified, defining the metric dimension of the graph. Calculations were performed manually to ensure consistency and accuracy.The analysis reveals a tiered linear reduction pattern, where the metric dimension does not increase linearly with p. The main findings are summarized in three theorems: for p = 2 and p = 3, the metric dimension of the Maple Leaf Graph equals p; for p = 4, 5, and 6, it equals p – 1; and for p = 7, 8, and 9, it equals p – 2. These results introduce a new class of graphs and provide theoretical insights into the behavior of metric dimension in multi-cycle constructions, thereby contributing to the development of combinatorial graph theory.
Aquifer Identification Using the Schlumberger Vertical Electrical Sounding (VES) Method in Mulyojati Village, Metro Barat Subdistrict, Metro City Mutafawwiqoh, Difa; Anggara Putra Prasetyo; Acep Ruchimat; Budy Santoso
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 27 No. 01 (2026): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol27-iss01/650

Abstract

Groundwater is ideally expected to be available in a sustainable manner and managed based on adequate subsurface hydrogeological information. However, conditions in Mulyojati Village, Metro Barat Subdistrict, Metro City indicate a lack of site-specific data on aquifer characteristics, despite increasing groundwater demand driven by population growth and socio-economic activities. This limitation may lead to uncertainty in well drilling planning and groundwater utilization. Therefore, an effective preliminary exploration method is required to identify groundwater-bearing layers. This study applies the Vertical Electrical Sounding (VES) method using the Schlumberger configuration to investigate subsurface resistivity variations related to lithology and groundwater saturation. The urgency of this research arises from the absence of previous geophysical investigations in the area, particularly within the heterogeneous Qpt Formation, which is considered a potentially productive aquifer. The objective of this study is to characterize subsurface resistivity and delineate potential aquifer zones in Mulyojati Village. The results are expected to provide essential baseline information for groundwater development planning and support sustainable groundwater resource management in the Metro City area.
Identification of Aquifer Potential Using Electrical Resistivity Tomography (ERT) Method in the Karst Area of Giritontro, Wonogiri, Central Java Asri, Nadia Putri Nur; Rahma Puspa; Anggara Putra Prasetya; Budy Santoso
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 27 No. 01 (2026): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol27-iss01/605

Abstract

Karst regions exhibit unique geological characteristics due to the dissolution of carbonate rocks, lending to the formation of complex underground aquifer systems. This study was conducted in BayemharjoVillage, Giritontro Sub-district, Wonogiri Regency part of the Sewu Karst Zone to identify aquifer potential using the dipole dipole electrical resistivity method. The survey was carried out along three measurement lines ranging from 216 to 710 meters in length, utilizing 72 electrodes with 10 meter spacing. The research involved data acquisition, processing, and interpretation using specialized resistivity software. Interpretation result revealed rock layers with potential as aquifers, particulary those with porous and permeable lithologies such as sandy limestone. Additionally, the presence of aquitard and aquiclude layers was identified, acting as barriers or flow paths for groundwater movement. The resistivity patterns and geological structures indicate the existence of groundwater pockets at various depths, which are crucial for managing clean water resources in this drought-prone region. The resistivity method prove to be effective in delineating aquifers zone within the complex karst environment.
The Relationship Between Probiotic Intake and Glycemic Profiles Among Metformin-Treated Type 2 Diabetes Patients Larasati, Rahma Ayu; Silviah; Afifah, Farabillah; Aniyah, Siti Hadzul
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 27 No. 01 (2026): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol27-iss01/648

Abstract

The ideal management of Type 2 Diabetes Mellitus should evolve from mere glucose-lowering strategies to a more comprehensive framework encompassing personalized medicine, technological integration, and systemic organ protection. A significant number of patients with Diabetes Mellitus (DM) continue to suffer from mortality and serious complications despite being on pharmacological therapy. Although trillions of dollars are spent annually on its management, diabetes remains a leading cause of mortality, claiming millions of lives each year across the globe. Probiotics have been proposed as an adjunctive therapy due to their role in modulating gut microbiota and glucose metabolism. This study aimed to analyze the effect of probiotic supplementation on Fasting Blood Sugar (FBS) levels in T2DM patients receiving metformin monotherapy. This experimental study involved 32 respondents, divided into probiotic intervention and placebo groups. FBS levels were measured pre- and post-intervention. Statistical analysis using the Paired T-Test showed a significant reduction in FBS levels (p=0.019). Conclusion: Probiotic supplementation significantly reduced FBS levels in T2DM patients on metformin monotherapy. However, this reduction was not clinically significant, as the final FBS levels did not differ significantly between the probiotic and placebo groups.  
Color Transitions in Tanjung-2 Chili Pepper at Green and Red Harvest Stages under Varying Growing Structures and Fertigation Levels Tivalli, Meivie; Kusumiyati, Kusumiyati; Anwar, Shazma; Konain Zahra Maqbool; Md Shazzadul Islam
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 27 No. 01 (2026): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol27-iss01/658

Abstract

Fruit color is a primary determinant of market acceptance for chili peppers (Capsicum annuum L.). This study quantified the green-to-red color transition at harvest using the CIELAB system. The experiment had a split-plot RCBD. Four growing structures as main plots: greenhouse, screen house, rain shelter, and open field. Four fertigation levels (25, 50, 75, and 100% ETc) as subplots. Color parameters L*, a*, b*, chroma, hue, and ΔE* were measured at both green and red harvest stages. Interactions between structure and fertigation level were significant for all color parameters. At the green stage, L* and b* values were highest in the screenhouse and greenhouse at 75–100% ETc. At the red stage, a* and chroma increased markedly, while hue decreased rapidly. This indicated accelerated carotenoid accumulation. Maximum ΔE* was observed in greenhouse and screenhouse with 100% ETc. Screenhouse with 75–100% ETc for the green harvest stage yields higher lightness (L*) and b* values. An open field combined with 50% ETc should be recommended for the red harvest phase to achieve higher a*, chroma, and ΔE* values, indicating improved red color intensity and visual quality. ΔE* was observed with 100% ETc, indicating accelerated ripening and a shorter harvest period.
Multi-Sensor Based on Internet of Thing (IoT) in Determining the Accuracy of Sensors for Air Temperature, Air Humidity, and Light Intensity Yunus, Muhammad; Yudoyono, Susilo; Setiawan, Dewa Gede Eka; Fatimah, Siti; Amir, Asmiati
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 27 No. 02 (2026): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) In Progress
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol27-iss02/661

Abstract

Multi-sensor technology based on the Internet of Things (IoT) is implemented in determining the accuracy of sensors for airtemperature, air humidity, and light intensity. The multi-sensor based on IoT consists of a DHT11 sensor to detect air temperature and humidity, and a BH1750 sensor to detect light intensity was implemented using the NodeMCU ESP8266 microcontroller, monitored via the IoT on the Blynk application on the smartphone. Data Sensor validation by comparing data from the Indonesian National Standards measuring instrument to determine the sensor accuracy. The results of testing the sensors for air temperature, air humidity, and light intensity produced average accuracies of 99.440%, 100%, and 99.874%, respectively. All sensor errors remain within the specified tolerance limit of <5%. The low error sensor results in a high accuracy value. These sensors are suitable for various monitoring needs, both in automation systems and environmental research.
Implementation of Smart Lectures for Chemistry Teachers of the MGMP in Padang Panjang City Rahadian Zainul; Budhi Oktavia; Dony Novaliendry; Amalia Putri Lubis
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 23 No. 04 (2022): Eksakta: Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol23-iss02/295

Abstract

The Chemistry Teachers Working Group (MGMP) of Padang Panjang City serves as a forum for senior high school chemistry teachers in Padang Panjang to collaboratively develop their professional careers and scientific competencies. The teachers' enthusiasm to improve more effective, high-quality, and innovative learning was demonstrated through their request for training in designing and implementing E-Learning in senior high school chemistry instruction. The methods used in the introduction and development program related to E-Learning through the flagship product, Smart Lecture, were conducted through lectures, question-and-answer sessions, mentoring, and workshops. The results of the community service program showed that: (1) the training participants were able to understand the preparation, design, and implementation of high-quality and interactive E-Learning in senior high school chemistry instruction, thereby improving the quality of chemistry learning; (2) the chemistry teachers of the MGMP of Padang Panjang City were able to motivate other teachers to diversify the strategies used in senior high school chemistry instruction; and (3) chemistry teachers were able to apply and implement senior high school chemistry learning strategies using E-Learning.
Artificial Intelligence-Based E-Learning in Chemistry Learning: A Review of Implementation in High Schools Rahadian Zainul; Dony Novaliendry; Budhi Oktavia; Fitrah Mey Harmi Siregar; Maiti Faddila; Hidayatul Husna; Delsya Helvira Suci
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 25 No. 04 (2024): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol25-iss04/307

Abstract

This study analyzes the challenges and opportunities for implementing artificial intelligence (AI)-based e-learning in West Sumatra, with global and regional comparisons. Infrastructure gaps are a major obstacle, with 30% of the region lacking adequate internet access, especially in rural areas. In addition, 25% of teachers do not have adequate training in the use of AI technology, hampering the effectiveness of its implementation in schools. Other challenges identified are low digital literacy and limited access to technological devices, which impact 20-25% of schools. This study uses a comparative approach and the results are expected to provide insights and recommendations for policy makers in improving infrastructure, teacher training, and digital literacy, in order to accelerate the adoption of AI in education in West Sumatra.
The Effect of Single and Double Dose Platelet Apheresis on Platelet Count A Thrombopoietin Levels and Percentage of Immature Platelet Fraction of Donor Post Donation Aulia Ramadhan Supit; Anzhari, Della Hashfi; Saptuti Chunaeni; Rahajuningsih Dharma Setiabudy
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 27 No. 02 (2026): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) In Progress
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol27-iss02/663

Abstract

Thrombapheresis is commonly used to obtain platelet concentrates; however, different collection doses may affect donor hematological responses. This study aimed to compare the effects of single-dose and double-dose thrombapheresis on platelet count, thrombopoietin (TPO) levels, and immature platelet fraction (IPF). A prospective comparative study with repeated measures was conducted in eight healthy donors (n = 8; 4 per group) at the Indonesian Red Cross Blood Donation Unit, Tangerang. Blood samples were collected before, immediately after, and on day 2 and day 4 post-donation. Platelet count and IPF were measured using an automated hematology analyzer, while TPO levels were assessed by ELISA. Data were analyzed using two-way ANOVA and Pearson correlation (p < 0.05). Platelet counts decreased immediately after thrombapheresis (23% in single-dose; 24% in double-dose) and gradually recovered. Significant effects of time and dose were observed (p < 0.05), but no difference between groups at day 4 (p > 0.05). TPO increased in both groups (50% vs 27%), and IPF changes were not significant (p > 0.05). A positive but non-significant correlation between TPO and IPF was found. Both procedures cause transient platelet reduction with gradual recovery. Findings should be interpreted cautiously due to the small sample size.
Biosorption of Indigo Carmine onto Duck Egg White-Modified Longan Peel Biosorbent: Effect of Particle Size and Contact Time Waarsyat, Fadli; Kurniawati, Desy; Etika, Sri Benti; Sari, Trisna Kumala; Husein, Saddam; Jeningsih; Septian Budiman
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 27 No. 02 (2026): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) In Progress
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol27-iss02/665

Abstract

The increasing demand in the textile industry ideally requires effective wastewater treatment systems to prevent environmental pollution. These pollutants are resistant to degradation and pose serious risks to aquatic ecosystems and human health. To address this issue, sustainable and low-cost treatment methods are urgently needed. Biosorption using agricultural waste has emerged as a promising alternative; however its performance is often limited by insufficient active binding sites. Therefore, surface modification using natural protein sources is proposed to enhance adsorption capacity and efficiency. This study aims to develop and evaluate longan peel modified with duck egg white (LP-DEW) as an eco-friendly biosorbent for indigo carmine removal. The effects of particle size and contact time were investigated, and adsorption kinetics were analyzed using pseudo-first-order, pseudo-second-order, and intraparticle diffusion models. The results showed that LP-DEW exhibited a maximum adsorption capacity of 128.27 mg g-1 at an optimal particle size of 63 μm and equilibrium time of 90 min. The adsorption process followed the pseudo-second-order model, indicating chemisorption as the dominant mechanism. In conclusion, LP-DEW demonstrates high adsorption efficiency and favorable kinetics, highlighting its potential as a sustainable biosorbent for dye-contaminated wastewater treatment.

Page 32 of 33 | Total Record : 327

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