Acta Chemica Malaysia

Journal: Acta Chemica Malaysia (ACMY)
Author:  Osemwota, I.O., Dania, S.O., Bakare, A.I., Eniola, R.I
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.01.2025.24.27

The distribution of Magnesium forms in surface hydromorphic soils of sourthern Nigeria was studied. Fifty four composite surface (0 to 15cm) soil samples drawn from different parent materials were used. Total Mgranged from 81.42 to 475.62mg/kg, while water soluble Mg, exchangeable Mg, difficulty exchangeable Mg and Mg reserved ranged from 0.080 to 1.04, 0.160 to 4.56, 0.24 to 5.60 and 0.40 to 150.70 cmol/kg, respectively. Soils formed on crystalline metamorphic and igneous rocks were highest in Mg status when compared to soils formed on shale mixed with sand stone and clay, coastal plain sand, coastal alluvium and fresh water swamps. Magnesium status in these soils was strongly influence by parent materials. Other factors that influenced the Mg formed on the different parent materials were silt and clay contents, organic matter and pH. Fifteen percent of the soils sampled were deficient in available Mg based on already established critical level for Nigerian soils.

Journal: Acta Chemica Malaysia (ACMY)
Author:  Ogbeide Osahon Kennedy, Aghedo Oscar Notoriuwa, Victor Emmanuel, Olowoeyo Israel, Asenoguan Nicole Osahenoma, Ovwero Emmanuel, Uadia Jeremiah Ogboma
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.01.2025.17.23

This study investigates the phytochemical composition, elemental make-up, and antioxidant properties of methanol extracts from the seed and stem bark of Morinda citrifolia (Noni). The phytochemical screening revealed the presence of glycosides, phenolics, eugenols, terpenoids, alkaloids, flavonoids, and tannins in both extracts, with steroids absent in the seed but present in the stem bark. The quantitative analysis showed higher alkaloid content in the stem bark (2.960%) compared to the seed (1.460%), while the seed exhibited a higher total phenolic content (24.430 mg/ml) than the stem bark (7.830 mg/ml). Antioxidant assays demonstrated significant activities in both extracts, with the stem bark extract displaying greater antioxidant potential, which doesn’t correlates with its higher phenolic content but the lower IC50 value (higher antioxidant activity) of the stem bark, which could be based on the composition, effectiveness, bioavailability of the phenolic and other bioactive compounds present in the stem bark which could have enhanced its antioxidant activity. The antimicrobial activity assays indicated that both extracts possess substantial antimicrobial properties, with the stem bark extract showing a slightly higher inhibitory effect. These findings suggest that different parts of Morinda citrifolia can be utilized strategically based on their specific phytochemical compositions to maximize therapeutic benefits, highlighting the potential of the stem bark as a natural antimicrobial and antioxidant agent.

Journal: Acta Chemica Malaysia (ACMY)
Author: H. M. Solayman, Umi Rabiatul Ramzilah P. Remli, Md. Arif Hossen, Kah Hon Leong, Sim Lan Ching, Noor Yahida Yahya, Azrina Abd Aziz, Minhaj Uddin Monir
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.01.2025.06.16

CQDs are one of the fast growing photocatalyst in the field of nanotechnology due to their excellent chemical, photostability and photoluminescence ability. Recently, CQDs are used as prominence photocatalyst in the field of photocatalytic dye wastewater treatment, bioimaging, bio sensing, bio medicine, photocatalytic hydro production and so on. The purpose of this research is to treat the methyl blue (MB) dye containing wastewater by using CQDs composites derived by water melon rinds (WMR). CQDs, TiO2, and CQDs/TiO2 photocatalysts were prepared by hydrothermal method and characterized by XRD, SEM, EDX, BET, XPS, UV-Vis and Photoluminescence spectra. In the results, it is found that CQDs with 0.1 g/L catalyst loading at 5 mg/L of dye concentration has the highest photocatalytic activity with 73% of MB removal compared to TiO2 (55%) and CQDs/TiO2 (27%) respectively. The photodegradation rate of MB was decreased with the increased of catalyst loading and higher degradation were achieved at the lowest initial dye concentration. Interestingly the degradation efficiency of MB was increased with augmented of pH concentration. So, this study proved that MB dye is reduced by utilizing CQDs photocatalyst in an environmentally friendly way. Finally, it can be summaries that CQDs has the potentiality to enhance photocatalytic performance.