Acta Chemica Malaysia

Journal: Acta Chemica Malaysia (ACMY)
Author:Sri Wahyuni, Salsabilla Claresta
ISSN: 2576-6732
e-ISSN: 2576-6724

This is an open access journal distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/acmy.02.2024.87.91

Coconut water is part of the coconut fruit that contains various nutrients such as minerals, vitamins, antioxidants, amino acids and enzymes that are beneficial to the body. Coconut water can be developed as an isotonic drink because the nutrients in coconut water have a good electrolyte balance like human body fluids. Coconut water, especially in young coconuts, contains quite good nutrients so that it can be categorized as a highly nutritious, hygienic and natural drink and there have been many studies that prove it can cure various diseases. Currently there are coconut water products that are used as isotonic drinks on the market, but not many variations are added. So, in this study, the addition of variants was carried out to improve the taste and additional benefits into the isotonic drink. The addition of variants carried out is by adding blueberry fruit extract. This study aims to determine the most optimum formulation of the ratio of young coconut water and blueberry extract and what tests are carried out to determine the optimum formulation. Where in this study conducted by making several variations of the addition of young coconut water and blueberry extract, namely 95% coconut water and 5% blueberry fruit extract (F1), 90% coconut water and 10% blueberry extract (F2), 85% coconut water and 15% blueberry extract (F3) and 80% coconut water 20% blueberry extract (F4). Then to find out the most optimum formulation, pH, viscosity and organoleptic testing were carried out. Then the results showed that formula F3 has a pH of 3.77 which indicates that this isotonic drink is in accordance with the provisions of the National Standards Agency, has a viscosity of 1.4 cP which is in accordance with the viscosity of isotonic drinks on the market and has the highest average general acceptance of 4.64 obtained from organoleptic testing with a hedonic test conducted to determine the highest favorability value tested by 10 respondents, so that the formula becomes the most optimal formula in making isotonic drinks from young coconut water and blueberry extract.

Journal: Acta Chemica Malaysia (ACMY)
Author:Annaas Y. A.
ISSN: 2576-6732
e-ISSN: 2576-6724

This is an open access journal distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/acmy.02.2024.81.86

Hydrogen storage is concerned with the process of storing hydrogen safely and efficiently. This is crucial because hydrogen may hold the potential as a green clean energy source to better exploit the energy obtained via renewable sources, although it is also highly flammable and can be difficult to store. In order to enrich the literature and further enhance the current understanding of hydrogen storage details, this review paper shortly discusses use of compression of hydrogen to high pressures, hydrogen liquefaction and metal hydride(s) for the purpose of storage of hydrogen. Results of the reviewed work have indicated that each process has its own advantages and disadvantages in terms of storage density, safety and energy requirements, etc., although; in general, the advantages defeat disadvantage. Proper hydrogen storage is a significant component in hydrogen utilization for different applications to help decarbonize related sectors.

Journal: Acta Chemica Malaysia (ACMY)
Author:Akpeji Bamidele Honesty, Nwabuoku Deborah Akachukwu, Adedokun John
ISSN: 2576-6732
e-ISSN: 2576-6724

This is an open access journal distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/acmy.02.2024.66.80

This research investigates the corrosion inhibition potential of banana pseudo-stem extract on mild steel in acidic environments. Utilizing gravimetric analysis, the study evaluates inhibition efficiency over time and with varying inhibitor concentrations. Results indicate a maximum inhibition efficiency of 97% after 24 hours with 5% v/v inhibitor concentration and 0.5 M HCl. Phytochemical analysis reveals the presence of proteins, steroids, carbohydrates, flavonoids, tannins, saponins, and glycosides in the extract, supporting its role as a green corrosion inhibitor. Adsorption of inhibitor molecules aligns with Langmuir and Freundlich adsorption isotherm models, confirmed by Gibb’s free energy values. Optimization through Response Surface Methodology predicts optimal conditions for maximum weight loss. Additionally, the study examines inhibition capacity in 0.5 M and 1.0 M HCl solutions, highlighting the extract’s efficiency in reducing corrosion rates. This research contributes valuable insights into the inhibition characteristics of banana pseudo-stem extract under specific conditions, suggesting its potential as an effective corrosion inhibitor for mild steel.