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Muhammad Ridwan
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Britain International of Exact Sciences Journal (BIoEx Journal)
Published by BIAR Publisher
ISSN : 26861216     EISSN : 26861208     DOI : https://doi.org/10.33258/bioex
Core Subject : Health, Science, Education,
Biochemistry, Genetics & Molecular Biology Chemistry Mathematics Medicine & Pharmacology Physics
Britain International of Exact Sciences Journal is a peer-reviewed journal published in January, May and September by BIAR Publisher. BIoEx Journal welcomes research paper in mathematics, physics, chemistry, biology, engineering, medical sciences, argicultural sciences and other related fields which is published in both online and printed versions.
Arjuna Subject : Matematika - Matematika (Lain-Lain)
Articles 183 Documents
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Unraveling the Drift: Understanding the Accelerated Movement of Earth's Magnetic North Pole toward Siberia Goshu, Belay Sitotaw
Britain International of Exact Sciences (BIoEx) Journal Vol 7 No 2 (2025): Britain International of Exact Sciences Journal, May
Publisher : Britain International for Academic Research (BIAR) Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/bioex.v7i2.1285

Abstract

The Earth's magnetic field has been experiencing a noticeable shift in recent decades, with the magnetic North Pole gradually drifting towards Siberia. The accelerated migration of the magnetic North Pole and its implications for comprehending the dynamics of the Earth's geomagnetic environment are examined in this study. Using historical data and linear regression models, we analyze the rate and pattern of the pole's movement, focusing on its trajectory toward Siberia. The results show a steady drift of approximately 10 kilometers per year, with predictions suggesting that by 2025, the magnetic North Pole will be located at 90.29 degrees latitude and 115.84 degrees longitude. The study also examines geomagnetic reversal events, noting significant occurrences in 1850, 1900, 1950, and 2000, and forecasts another reversal in 2025. These findings shed light on the natural variability of Earth's magnetic field and emphasize the need for continued monitoring. The study highlights the importance of understanding the magnetic field's behavior for navigation systems, satellite communication, and geophysical exploration. Furthermore, it raises questions about the long-term effects of these shifts on Earth’s magnetic environment and its interactions with solar wind. This research provides valuable insights into the ongoing changes in the Earth's magnetic field and underscores the importance of monitoring geomagnetic changes for scientific, technological, and environmental purposes.
Mass-Driven Orbital Eccentricity: The Dominant Role of Planetary Mass over Size in Shaping Explanatory Orbits Goshu, Belay Sitotaw
Britain International of Exact Sciences (BIoEx) Journal Vol 7 No 2 (2025): Britain International of Exact Sciences Journal, May
Publisher : Britain International for Academic Research (BIAR) Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/bioex.v7i2.1286

Abstract

The diversity of exoplanetary orbits, particularly their eccentricity, challenges traditional models of planetary dynamics, with planetary mass and size as potential drivers. This study investigates the dominant role of mass oversize in shaping orbital eccentricity, aiming to refine theoretical frameworks for exoplanetary systems. Observational data from 500 simulated exoplanets were analyzed to identify correlations between mass, size, and eccentricity with the Pearson correlation and statistical tests. Numerical simulations with REBOUND modeled mass-driven gravitational interactions, comparing eccentricity evolution across varying masses and radii. The model was fitted to propose a refined framework. Mass showed a weak positive correlation with eccentricity (r=0.15, p=0.002), while size had a negligible impact (r=0.08). Terrestrial planets exhibited higher mean eccentricity (0.299) than gas giants (0.234), suggesting external influences. Simulations confirmed mass-driven eccentricity growth (e.g., 0.004 at 10.0 M⊕), with size effects absent. The refined model, e ≈ 0.360⋅(M/M⊕)0.00001⋅(aratio)0.00001⋅(t/105), indicates a limited mass influence modulated by the system architecture. Mass primarily drives eccentricity, though system-specific factors amplify terrestrial eccentricities, impacting habitability. Future studies should use actual data, extend simulations, and include tidal effects to refine models, aiding habitability assessments in missions like TESS. This research advances our understanding of exoplanetary dynamics, emphasizing mass as a key determinant.
Mitigating Turbidity in the Mandroseza Basin: Potential of High-Flow Pump Integration with Flocculant-Assisted Decantation Pretreatment Andrianarivony Tiona; Robijaona Rahelivololoniaina Baholy
Britain International of Exact Sciences (BIoEx) Journal Vol 7 No 2 (2025): Britain International of Exact Sciences Journal, May
Publisher : Britain International for Academic Research (BIAR) Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/bioex.v7i2.1307

Abstract

The increasing challenge of sediment-laden inflows to the Mandroseza Basin, the primary raw water source for Antananarivo, Madagascar, necessitates effective pretreatment strategies to safeguard water treatment plant efficiency. This study investigates the integration of a high-flow pumping system with flocculant-assisted decantation to mitigate seasonal turbidity spikes. Laboratory-scale static and dynamic sedimentation tests were conducted to evaluate the performance of aluminium sulfate, sodium silicate, cationic polyacrylamide (PAM), and polyethylene oxide (PEO). Results from jar tests indicated optimal dosage ranges for each flocculant, guiding subsequent dynamic settling experiments under simulated operational conditions. PAM, at 5-6 mg/kg, and PEO, at 17-18 mg/kg, consistently outperformed sodium silicate, demonstrating superior supernatant clarity (TSS of 46 mg/L and 35 mg/L, respectively) and enhanced sludge compaction. Flattening tests further confirmed the cohesive and dense nature of PAM and PEO-induced sludge. While sodium silicate offered moderate performance, its lower efficiency in fine particulate removal makes it less suitable for stringent clarity requirements. The findings suggest that integrating optimized PAM or PEO dosing with high-flow conveyance presents a promising, scalable solution for managing turbidity at the intake, reducing the load on downstream treatment processes and improving overall plant sustainability. Future research should focus on field validation and comprehensive cost-benefit analysis for large-scale implementation in urban water supply systems facing similar seasonal sedimentation challenges.
Unlocking the Nutritional Treasure: Typhonodorum lindleyanum Schott. (Viha) after Antinutrient Removal Letsara Rokiman; Rajaovelo Andry Tsimioly; Razafindrahaja Vololotahina; Ratalata Baovola; Fatiany Pierre Ruphin; Ralaivaon-Tsitonta Jumael Edith Fabrice; Ngbolua Koto-Te-Nyiwa Jean Paul; Robijaona Rahelivololona Baholy
Britain International of Exact Sciences (BIoEx) Journal Vol 7 No 2 (2025): Britain International of Exact Sciences Journal, May
Publisher : Britain International for Academic Research (BIAR) Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/bioex.v7i2.1309

Abstract

Viha (Typhonodorum lindleyanum) presents a promising avenue for enhancing food security and addressing malnutrition in Madagascar, particularly in the face of climate change. This study comprehensively characterized the nutritional and phytochemical properties of Viha, considering the impact of processing methods on its edibility and potential health benefits. Our findings reveal a diverse nutritional profile across Viha plant parts. Rhizomes, rich in carbohydrates, exhibited significant variations in micronutrient content depending on cooking methods. Steaming enhanced iron and potassium, while boiling reduced calcium and phosphorus. Viha seeds demonstrated a relatively stable micronutrient profile across preparations, while leaves were rich in potassium, phosphorus, and iron. Furthermore, the study identified a rich array of phytochemicals, including tannins, flavonoids, and leucoanthocyanidins. While the presence of antinutrients such as phytate and oxalate requires careful consideration, appropriate processing methods can mitigate their impact. These findings suggest that Viha, with proper processing and utilization, could serve as a valuable food source, enhancing dietary diversity and nutritional security, especially in regions vulnerable to climate change impacts such as droughts and food shortages. Further research is warranted to optimize processing methods, enhance nutrient bioavailability, and explore sustainable cultivation and utilization strategies for Viha as a climate-resilient food source in Madagascar.
Evaluation of Remote Sensing Data for the Identification of Lake-Stream Behavior during Normal and Cyclonic Seasons: The Case of Lake Alaotra, Madagascar Rabotovao Sebas David; Ratsimbazafy Aro Pascal; Andriazafinahazo Fridolin; Rajaonah Rabevala; Razafindrazanakolona Andrianjafimanjato Daniel; Robijaona Rahelivololoniaina Baholy
Britain International of Exact Sciences (BIoEx) Journal Vol 7 No 2 (2025): Britain International of Exact Sciences Journal, May
Publisher : Britain International for Academic Research (BIAR) Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/bioex.v7i2.1310

Abstract

Employing a synergistic approach integrating remote sensing and environmental science, this investigation rigorously examined the spatio-temporal dynamics of Lake Alaotra, Madagascar, under baseline seasonal conditions. The study elucidates the significant potential of satellite-derived data, coupled with advanced geospatial analytics, for precise mapping and comprehensive monitoring of intricate hydrological systems within diverse environmental contexts. Multi-temporal satellite imagery facilitated the accurate delineation of the lake's spatial extent, the quantification of seasonal fluctuations in its surface area, and the detection of inter-annual changes. Multivariate analysis of environmental covariates, including climatic oscillations, anthropogenic pressures, and inherent topographical attributes, enabled the identification and hierarchical prioritization of factors influencing the lake's hydrological regime. These findings yield critical evidence-based insights for informed decision-making in water resource management and environmental conservation strategies within Madagascar. Furthermore, scenario-driven predictive modeling of future hydrographic network modifications provides a crucial anticipatory framework for addressing potential challenges related to water availability across the nation, thereby enabling proactive planning and the implementation of targeted adaptation measures to mitigate adverse impacts. This research underscores the indispensable and evolving role of remote sensing technologies in the continuous monitoring of vital water resources and environmental integrity, demonstrating the efficacy of combining satellite data streams, sophisticated analytical methodologies, and remote sensing expertise to address salient environmental challenges in ecologically sensitive regions such as Madagascar.
Evaluation of Soils and Their Cover Before and After a Natural Disaster in Madagascar Sebas David Rabotovao; Fridolin Andriazafinahazo; Rabevala Rajaonah; Aro Pascal Ratsimbazafy; Andrianjafimanjato Daniel Razafindrazanakolona; Baholy Robijaona Rahelivololoniaina
Britain International of Exact Sciences (BIoEx) Journal Vol 7 No 2 (2025): Britain International of Exact Sciences Journal, May
Publisher : Britain International for Academic Research (BIAR) Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/bioex.v7i2.1311

Abstract

In Madagascar, the statistics on the natural disaster allowed us to determine the study area and the type of natural disaster to be treated in our study. The choice of the Vatovavy Region for our project treatment of the theme ‘’Evaluation of soils and its coverings before and after natural disaster Madagascar’’ is based on crucial considerations linked to its history of vulnerability to cyclones between 2006 and 2022. This region was particularly affected by these natural phenomena during this period, making it a suitable site for assessing the impact of natural disasters on soils and their covers. We aims to analyze the evolution of space observation of the Earth, focusing on technological advances of spatial remote sensing, spectral discrimination of satellite sensors, and the physical principles of remote sensing for agriculture. With a focus on Madagascar, it includes satellite identification relevant, the collection of spatial data, and the use of these data to characterize agricultural areas. The project highlights the benefits of remote sensing for agriculture, analyzes the evolution of coverage and land use, studies natural disasters, and maps land use between 2006 and 2022, in identifying the factors of change and prioritizing them according to their impact on land use.
Phytochemical study and structural determination of the isolated product of Ricinus communis (Euphorbiaceae) Andrianarijaona Mamy; Ralaivaon-dratsitonta Jumaël Edith Fabrice; Fatiany Pierre Ruphin; Robijaona Rahelivololoniaina Baholy
Britain International of Exact Sciences (BIoEx) Journal Vol 7 No 3 (2025): Britain International of Exact Sciences Journal, September
Publisher : Britain International for Academic Research (BIAR) Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/bioex.v7i3.1356

Abstract

A phytochemical and structural study of the leaves of Ricinus communis (castor bean plant) was conducted to identify and characterize its active compounds. The plant material, sourced from Madagascar, was subjected to sequential maceration with solvents of increasing polarity, yielding hexane, dichloromethane (DCM), and methanolic extracts. Phytochemical screening revealed the presence of polysaccharides as the most abundant components, with moderate amounts of steroids and low concentrations of alkaloids and saponins. The DCM extract was further purified using thin-layer chromatography and column chromatography, leading to the isolation of a pure compound. Structural elucidation was performed using mass spectrometry (EI-MS) and one- and two-dimensional nuclear magnetic resonance (NMR) spectroscopy, including 1H, 13C, and DEPT-135 experiments. The spectroscopic data established a molecular formula of C28H46O and a tetracyclic steroid structure with two degrees of unsaturation. A comparison of the obtained chemical shifts with those reported in the literature confirmed the compound's identity as Brassicosterol, a key phytosterol.
Phytochemical Analysis of a Medicinal Plant Senna Alata (Fabaceae) Andrianarijaona Mamy; Ralaivaon-Dratsitonta Jumaël Edith Fabrice; Fatiany Pierre Ruphin; Robijaona Rahelivololoniaina Baholy
Britain International of Exact Sciences (BIoEx) Journal Vol 7 No 3 (2025): Britain International of Exact Sciences Journal, September
Publisher : Britain International for Academic Research (BIAR) Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/bioex.v7i3.1360

Abstract

A preliminary phytochemical study was conducted on the bark of Senna alata, a medicinal plant widely used in Madagascar, to identify and isolate its chemical constituents. This plant is traditionally used for various ailments, including dermatological and respiratory issues. A sequential solid-liquid extraction with solvents of increasing polarity—hexane, dichloromethane (DCM), and ethanol—was performed, with the polar ethanol extract yielding the highest mass. Phytochemical screening of the hydroethanolic extract confirmed the presence of several compound classes. Abundant polysaccharides and flavonoids were detected, along with low concentrations of alkaloids, steroids, saponins, and polyphenols. The DCM extract was then subjected to column chromatography, with fractions monitored by thin-layer chromatography (TLC), which was also used to optimize the solvent system for separation. This process isolated two pure fractions, F28-34 and F61-69. The more abundant fraction, F61-69 (8 mg), was selected for structural elucidation. Mass spectrometry revealed a molecular ion peak at m/z 400, establishing the compound's molecular weight. Subsequent analysis by 1H NMR and 13C NMR spectroscopy revealed a characteristic steroid skeleton. The compound contains 28 carbons and its Double Bond Equivalence (DBE) was calculated as 5, corresponding to four rings and one double bond. Based on the comprehensive spectroscopic data and a comparison to literature, the compound was definitively identified as Campesterol.
Phytochemical Analysis of Cynometra Madagascariensis (Fabaceae), a Malagasy Medicinal Plant Andrianarijaona Mamy; Ralaivaon-Dratsitonta Jumaël Edith Fabrice; Fatiany Pierre Ruphin; Robijaona Rahelivololoniaina Baholy
Britain International of Exact Sciences (BIoEx) Journal Vol 7 No 3 (2025): Britain International of Exact Sciences Journal, September
Publisher : Britain International for Academic Research (BIAR) Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/bioex.v7i3.1361

Abstract

A comprehensive phytochemical and physicochemical investigation was conducted on the bark of Cynometra madagascariensis, a plant of the Fabaceae family traditionally used in Madagascar to treat and heal wounds and burns. Sequential maceration extractions were performed with solvents of increasing polarity (hexane, dichloromethane, and methanol) to obtain a range of crude extracts. Subsequent phytochemical screening revealed a diverse chemical profile, with a significant presence of tannins and terpenoids, and lower concentrations of quinones and saponins. Alkaloids, coumarins, flavonoids, and steroids were notably absent from the bark. Chromatographic methods were then employed for the separation and isolation of constituents from the hexane extract. Thin-layer chromatography (TLC) was utilized to optimize the mobile phase and monitor the fractionation process. This led to the successful isolation of a pure compound, designated F58-60, through column chromatography. The structure of this molecule was elucidated using one-dimensional NMR spectroscopy (1H and 13C NMR). A comparative analysis of the spectroscopic data with published literature confirmed the compound's identity as di(2-ethylhexyl) phthalate. This research provides a foundational understanding of the chemical composition of this medicinal plant and paves the way for further studies on the biological activities of its constituents.
Unveiling the Bio-Inspired and Green Chemistry Potential of Ceylon and Cape Gooseberries through Comprehensive Nutritional Profiling Razafimahefa Mirana Verohanitra; Razafindrazanakolona, Daniel; Ralaivaon-Tsitonta Jumael Edith Fabrice; Robijaona Rahelivololoniaina Baholy
Britain International of Exact Sciences (BIoEx) Journal Vol 7 No 3 (2025): Britain International of Exact Sciences Journal, September
Publisher : Britain International for Academic Research (BIAR) Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/bioex.v7i3.1362

Abstract

This study meticulously investigates the chemical and nutritional profiles of two underexplored tropical fruit species indigenous to Madagascar: the Ceylon Gooseberry (Dovyalis hebecarpa) and the Cape Gooseberry (Physalis peruviana). Characterizing such native species is vital for diversifying food sources and enhancing nutritional security, particularly in biodiversity-rich regions.Systematic analyses performed across various plant compartments, notably their foliage, revealed a significant richness in essential micronutrients. Leaves of both species demonstrated substantial concentrations of potassium, phosphorus, iron, magnesium, and aluminum. Furthermore, Physalis peruviana leaves exhibited a particularly significant protein content, elevating their prospective utility beyond fruit consumption. This robust nutritional profile reinforces their potential as valuable, locally sourced ingredients to foster balanced diets in the region. Parallel to the nutritional assessment, empirical processing trials were initiated to ascertain the technological feasibility and quality attributes of derived products, focusing on wine. The fermentation processes consistently yielded wines categorized as dessert wines, which demonstrated stable physicochemical characteristics and promising shelf-life properties. This intrinsic stability, coupled with their unique profiles, suggests compelling added value within agro-food valorization strategies. Collectively, these findings underscore the considerable potential of both Dovyalis hebecarpa and Physalis peruviana for the innovative development of novel food products. Such initiatives not only contribute to agricultural diversification but also align seamlessly with circular economy principles by utilizing underexploited plant parts, and sustainable development by fostering local biodiversity and resource efficiency. This research provides a scientific basis for promoting the cultivation and processing of these indigenous fruits, contributing to economic growth and environmental stewardship.

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