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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 402 Documents
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Comparative Analysis of Coral Cover Percentage and Species Diversity in Karanrang Island, Balang Lompo Island, Badi Island, and Lumu-Lumu Island Using the Underwater Photo Transect (UPT) Method Gracela; Nita Rukminasari; Jamaluddin Fitrah Alam; Sri Wahyuni Rahim
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-iss01/634

Abstract

This study assessed live coral cover and coral genus diversity across Karanrang Island, Balang Lompo Island, Badi Island, and Lumu-Lumu Island. Data collection was conducted at 12 observation stations (depth ±5 m) using the Underwater Photo Transect (UPT) method in April 2025. Photo analysis with CPCe 4.1 software was used to calculate the percentage of live coral cover, while the diversity index was calculated using the Shannon-Wiener formula (H’). The findings revealed that Badi Island exhibited the highest live coral cover (32.31–45.03%), whereas Lumu-Lumu Island demonstrated the lowest condition (10.60–24.97%). The highest diversity index was recorded on Balang Lompo Island (H' = 2.53) and the lowest on Karanrang Island (H' = 0.83). Badi Island is predominantly composed of Porites sp. and Acropora sp., suggesting ecosystem stability and a high potential for regeneration, while Karanrang and Balang Lompo Islands display moderate conditions with a prevalence of adaptive massive corals. These results show variations in coral cover and diversity between islands due to differences in environmental pressures and the ecological characteristics specific. These findings emphasize the need for location-based management to maintain the ecological functions and restoration potential of coral reefs ecosystem in the Spermonde Islands.
Comparison of Mangrove Biomass in Three Different Mangrove Ecosystem Locations in Maros Regency Muhammad Yusran; Nita Rukminasari; Joeharnani Tresnati; Wilma Joana Carolina Moka
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-iss01/635

Abstract

This study aims to analyze the variation in mangrove biomass across three locations in Maros Regency, South Sulawesi, namely Borongkalukua, Bonto Bahari, and Ampekale. Data collection was conducted using purposive sampling design, 27 observation plots (10×10 m; n=9 per location) were established to estimate biomass through Diameter at Breast Height (DBH) and species-specific allometric equations. Five mangrove species were identified, namely Rhizophora mucronata, Rhizophora apiculata, Avicennia alba, Avicennia marina, and Sonneratia alba. The two-way ANOVA results showed that species (p = 0.0003), location (p = 0.0266), and their interaction (p = 0.0065) had significant effects on biomass. The Kruskal–Wallis test also confirmed differences in median biomass among locations (p = 0.0104). Borongkalukua exhibited the highest biomass (302.57 Mg/ha) dominated by R. mucronata and R. apiculata, followed by Ampekale (223.20 Mg/ha) dominated by R. apiculata and S. alba, while the lowest biomass was recorded in Bonto Bahari (129.44 Mg/ha), dominated by A. marina. These variations in biomass reflect differences in species’ adaptive capacity to local environmental conditions. Overall, the findings emphasize that the interaction between species and location is a key determinant of mangrove biomass productivity. 
The Effectiveness of Asystasia gangetica (L.) T. Anderson Leaf Extract as a Corrosion Inhibitor for Mild Steel in Hydrochloric Acid Medium Karina Ventika Sari; Emriadi; Yeni Stiadi
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 26 No. 04 (2025): 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/vol26-iss04/636

Abstract

 The inhibition effectiveness of the extract in hydrochloric acid solution was analyzed using the weight loss method at 30 °C for 7 hours to determine the corrosion rate and inhibition efficiency. The active compounds were identified through phytochemical tests, while the adsorption type was determined based on thermodynamic parameters. Characterization of surface changes on mild steel was carried out using UV-Vis spectroscopy and Field Emission Scanning Electron Microscopy (FESEM). The results revealed the presence of flavonoids, alkaloids, steroids, triterpenoids, and phenolics, which contribute to the adsorption process on the mild steel surface. The lowest corrosion rate was obtained at a concentration of 8 g/L, namely 0.43 mg/cm².h, with the highest inhibition efficiency of 73.42%. The R² value approaching 1 follows the Langmuir adsorption isotherm, with a  value of -23.79, indicating that EDAG molecules are adsorbed on the mild steel surface through mixed adsorption. Surface morphology analysis showed a smoother steel surface after immersion in the inhibitor solution, indicating the formation of a protective layer. Thus, compared to previous studies, EDAG exhibits higher inhibition efficiency and demonstrates potential as an environmentally friendly corrosion inhibitor alternative.
Platelet-Rich Plasma (PRP) Allogenic: A Potential Challenge for Decreasing Random Blood Glucose, Uric Acid, and Cholesterol Levels in A Preliminary Pre and Post Test Study on Adult Subjects Diah Hastuti; Awal Prasetyo; Della Hashfi Anzhari; Resti Ariani; Mutia Syafira; Anna Kartika Yuli Astuti; Rina Puspita
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-iss01/643

Abstract

Ideally, metabolic homeostasis is maintained through stable glucose regulation, balanced lipid metabolism, and effective uric acid clearance under conditions of minimal systemic inflammation. In real clinical conditions, aging and persistent low-grade inflammation frequently disrupt this balance, leading to hyperglycemia, dyslipidemia, and elevated uric acid levels. Current pharmacological management mainly emphasizes metabolic control and may not sufficiently address underlying tissue dysfunction or inflammatory processes. Platelet-rich plasma (PRP) is a blood-derived bioregenerative product containing growth factors with anti-inflammatory and regenerative properties, offering a potential supportive approach for metabolic regulation. Nevertheless, PRP administration has predominantly relied on invasive delivery methods. Nebulization provides a non-invasive pulmonary route that enables rapid systemic absorption, representing an alternative delivery strategy. Despite its potential advantages, clinical evidence regarding the metabolic effects of PRP delivered via nebulization remains limited, creating an urgent need for preliminary clinical evaluation. Therefore, this pre–post test study aimed to assess the effects of allogeneic PRP nebulization on random blood glucose, uric acid, and total cholesterol levels. Fourteen adult subjects received PRP nebulization for five consecutive days. The intervention resulted in a significant reduction in random blood glucose levels and mild decreasing trends in uric acid and total cholesterol without serious adverse events.
The Relationship Between Probiotic Intake and Glycemic Profiles Among Metformin-Treated Type 2 Diabetes Patients Rahma Ayu Larasati; Silviah; Farabillah Afifah; Siti Hadzul Aniyah
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.  
Aquifer Identification Using the Schlumberger Vertical Electrical Sounding (VES) Method in Mulyojati Village, Metro Barat Subdistrict, Metro City Difa Mutafawwiqoh; 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.
Color Transitions in Tanjung-2 Chili Pepper at Green and Red Harvest Stages under Varying Growing Structures and Fertigation Levels Meivie Tivalli; Kusumiyati Kusumiyati; Shazma Anwar; 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.
The Spectrum of Severity: Clinical and Hematological Markers in Jakarta’s COVID-19 Patients Erlin Listiyaningsih; Shinta Dewi Permata Sari; Dewi Martalena; Wawang Sukarya
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 27 No. 02 (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-iss02/660

Abstract

Jakarta, a densely populated megacity with high hybrid immunity, presents a unique epidemiological landscape for COVID-19. Understanding the clinical and hematological markers in this context is vital for improving clinical management. This study aims to analyze the clinical and hematological profiles of COVID-19 patients in Jakarta to identify markers associated with disease severity. This cross-sectional study analyzed secondary data from 100 confirmed COVID-19 patients (26 mild, 54 moderate, 20 severe) at two Jakarta hospitals. ANOVA and Kruskal-Wallis tests were employed to compare variables across severity groups, while categorical variables were analyzed using Chi-square tests. Significant associations with increasing severity were found for higher HR and RR. Among hematological parameters, basophil levels decreased significantly with higher severity. Although not statistically significant, trends of decreasing lymphocytes and platelets, alongside increasing blood glucose and neutrophils, were observed. Diabetes was the most prevalent comorbidity in severe cases. In conclusion, HR, RR, and basophils roles as significant markers of COVID-19 severity in our population. Trends in lymphocyte, thrombocyte, blood glucose, and diabetes prevalence, align with known patterns of severe disease with insignificant statistically, due to sample size limitations.
Multi-Sensor Based on Internet of Thing (IoT) in Determining the Accuracy of Sensors for Air Temperature, Air Humidity, and Light Intensity Muhammad Yunus; Susilo Yudoyono; Dewa Gede Eka Setiawan; Siti Fatimah; Asmiati Amir
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 27 No. 02 (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-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.
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; Della Hashfi Anzhari; Saptuti Chunaeni; Rahajuningsih Dharma Setiabudy
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 27 No. 02 (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-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.

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