Acta Chemica Malaysia

Journal: Acta Chemica Malaysia (ACMY)
Author:Tatiane Michele Popiolski, Alysson Helton Santos Bueno, Fábio Akira Mori
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.02.2023.56.61

Large amounts of low-carbon steel are used globally in many industrial sectors, as this material is very versatile, economical, and effective. The major problem with this type of steel is its susceptibility to corrosion, especially if used in acidic media, which is quite common in industry. Therefore, several anticorrosion methods are used for protecting structures and equipment, and an economical and effective method for protection is the use of inhibitors. The current ecological awareness, together with more rigid sustainability legislation, has created opportunities for research on the use of organic, nontoxic inhibitors from renewable sources. Tannins have been studied as likely inhibitors of the corrosive process due to their ability to form stable tannin complexes with corrosion products on the metal surface. These compounds are composed of flavonoid units and are considered an innovative line of anticorrosion products. This study evaluated the corrosion inhibition performance of tannins extracted from Stryphnodendron adstringens (Mart. Coville.) (barbatimão), a tree species characteristic of the Brazilian Cerrado biome, compared with the corrosion inhibition performance of commercial tannins extracted from Acacia mearnsii (De Wild) (black wattle) and cationically modified in terms of the protection of (Society of Automotive Engineers International) SAE 1020 carbon steel in a medium of 0.1 molar hydrochloric acid. The electrochemical methods of potentiodynamic polarization, electrochemical impedance spectroscopy, and gravimetry were used to characterize the inhibitory effects of the tannins, together with Fourier transform infrared spectroscopy for analysis of the reaction product between the iron and tannins. The results obtained showed the mixed inhibitor character of the tannins from barbatimão, which achieved good results, with an inhibition efficiency of up to 79%, compared with 95% for the modified tannins from black wattle.

Journal: Acta Chemica Malaysia (ACMY)
Author:Inncocent Chile Nzeh, Benedict I. Uzoechina, Nwamaka Joan Ozoh, Victoria Uju Okoli
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.02.2023.49.55

The impact of nutritional food production and the harmful health effect of fertilizer applications on life expectancy in Nigeria motivated this study. The study applied the framework of ARDL with annual data that covers the period from 1980 to 2020. Findings indicated that in the short-run and the long-run, food production index had a positive and significant impact on life expectancy, while the effect of agricultural nitrous oxide emissions was negative though not significant. In the short-run and the long-run also, both GDP per capita and government expenditure on health had positive and significant impact on life expectancy. However, while government expenditure on education had a positive but insignificant effect on life expectancy, food importation had a negative but insignificant impact. Consequently, the study contends that government should continue to intervene in the cultivation of local food crops that are rich in nutrients through various incentives to small holder farmers. Equally, the rampant use of fertilizers in the cultivation of food crops, especially synthetic fertilizers should be reduced, while the importation and consumption of all manner of processed foods should be checked.

Journal: Acta Chemica Malaysia (ACMY)
Author:Annisa Farida Muti, Erna Harfiani, Putu Ayu Amanda Giri, Annisa Ayu Wulandari
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.02.2023.45.48

Taraxacum officinale F.H. Wigg., commonly known as Jombang in Indonesia, is one of the 30 medicinal plants processed into Scientific Jamu. Jombang has been used empirically to both prevent and treat liver illness. In order to maintain consistency in quality, safety, and efficacy, Jombang extract must be standardized; as a result, extracts used as raw materials for medicines have constant specific and non-specific parameters and are expected to meet quality requirements to be accepted in healthcare settings. This research intended to analyze the general standard parameters of the 50%-ethanolic extract of Jombang leaves from Tawangmangu, Indonesia. The specific parameters are organoleptic properties, phytochemical composition, water-soluble and ethanol-soluble extract content; while the non-specific parameters consist of water content, ash content, acid-insoluble ash content, heavy metal, and microbial contamination. Both parameters are determined using the method established by the Indonesian Ministry of Health for General Standard Parameters of Extracts. The results indicated that the 50%-ethanolic extract of Jombang leaves had thick extract, dark brown color, distinctive smell, and slightly bitter taste. Alkaloid, saponins, flavonoids, and steroids were found in the extract’s phytochemical screening results. It contained 67.62% of water-soluble extract and 18.83% of ethanol-soluble extract. Mold and yeast contamination were negative (<1.0 x 103 colonies/ g), Pb and Cd levels were undetectable (<0,009 ppm and <0,00011 ppm, respectively), while the water content value was 13.26%, the ash content value was 9.87%, and the acid insoluble ash content value was 0.48%.