Article
Chemistry, Multidisciplinary
Meixuan Peng, Shasha He, Chonggang Wu, Zhenyu Chen, Hongyu Cen
Summary: During the COVID-19 epidemic, traditional Chinese patent medicine played a significant role in treatment and prevention. However, the excessive production and expiration of these medicines pose challenges in disposal and resource utilization. In this study, the organic components of a traditional Chinese patent medicine called YanReQing Granules (YGE) were extracted and analyzed, and it was found that YGE has a strong inhibitory effect on the corrosion of metal. The active ingredients in YGE form a shielding layer at the metal interface through electrostatic adsorption, enhancing its protective properties.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Review
Materials Science, Multidisciplinary
Lucas Souza, Elaine Pereira, Lioudmila Matlakhova, Viviane A. F. Nicolin, Sergio N. Monteiro, Afonso R. G. de Azevedo
Summary: Carbon steel is widely used in severe industrial conditions and is highly susceptible to corrosion. Traditional corrosion inhibitors, although effective, are toxic to humans and harmful to the environment. Ionic liquids, as a new alternative, have shown promising results as corrosion inhibitors for carbon steel in hydrochloric acid. This review presents recent advances in the application of ionic liquids for corrosion inhibition, with all results obtained from potentiodynamic polarization tests.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Multidisciplinary
Wagdy El-Dougdoug, Arej S. Al-Gorair, Asmaa Abou Elsaoud, Hanaa Hawsawi, Ahmed Elaraby, El Sayed Mabrouk, Metwally Abdallah
Summary: Novel cationic surfactants were synthesized and evaluated as corrosion inhibitors for carbon steel. The study found that the inhibition efficiency increased with increasing concentration of the surfactants and decreasing temperature. The surfactants were classified as mixed inhibitors.
GREEN CHEMISTRY LETTERS AND REVIEWS
(2022)
Article
Chemistry, Physical
Yaroslav G. Avdeev, Tatyana A. Nenasheva, Andrey Yu Luchkin, Andrey Marshakov, Yurii Kuznetsov
Summary: This study investigates the kinetics of hydrogen cathodic reduction on low-carbon steel in hydrochloric acid solutions containing corrosion inhibitors, namely quaternary ammonium salts and a 3-substituted 1,2,4-triazole. The results show that the addition of these inhibitors inhibits the cathodic reduction and penetration of hydrogen into the steel. The 3-substituted 1,2,4-triazole is found to be the most effective inhibitor of hydrogen absorption.
Article
Engineering, Chemical
M. Abdallah, Arej S. Al-Gorair, A. Fawzy, H. Hawsawi, R. S. Abdel Hameed
Summary: The anti-corrosion efficiencies of PVA and AA on CSX60 carbon steel in 1.0 M HCl solutions were found to increase with decreasing temperatures and increasing concentrations. These polymeric molecules demonstrated the ability to inhibit general and pitting corrosion by forming adsorbent films that isolated the CSX60 surface from aggressive acidic solutions.
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Moataz M. Abdelsalam, Mahmoud A. Bedair, Ali M. Hassan, Bassem H. Heakal, Ahmed Younis, Zaghloul Elbialy, Maher A. Badawy, Hossam El-Din Fawzy, Shereef A. Fareed
Summary: Three triazole Schiff base derivatives were synthesized and investigated as corrosion inhibitors. The compounds showed high inhibition efficiency, with the best performance observed at a concentration of 1.0 x 10(-3) mol/L. Experimental and computational results were in good agreement, confirming the effectiveness of the inhibitors.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
K. Kousar, M. S. Walczak, T. Ljungdahl, A. Wetzel, H. Oskarsson, P. Restuccia, E. A. Ahmad, N. M. Harrison, R. Lindsay
Summary: The combination of electrochemical measurement and interface analysis was used to study the interaction between the corrosion inhibitor OMID and carbon steel in 1 M hydrochloric acid. The results showed excellent performance of OMID below the critical micelle concentration, with the interface evolving towards OMID bound to film-free carbon steel as the corrosion rate decreases. This finding is crucial for researchers trying to predict the functionality of corrosion inhibitors and discover next generation chemistries through atomic scale modeling.
Article
Chemistry, Physical
Demian Njoku, Chigoziri N. Njoku, Hassane Lgaz, Peter C. Okafor, Emeka E. Oguzie, Ying Li
Summary: The seed extract of Piper guineense demonstrates remarkable and sustainable anticorrosion performance for protecting Q235 carbon steel in acid chloride medium, showing strong interfacial adsorption and simultaneous inhibiting effects on both cathodic and anodic reactions of the corrosion process. Additionally, molecular dynamics simulations support the anti-corrosion efficiency of the extract.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Arafat Toghan, H. S. Gadow, Hemat M. Dardeer, H. M. Elabbasy
Summary: Five new halogenated cyclic imides containing a majority of methanoisoindole-1,3-dione unit were synthesized and their performance as corrosion inhibitors on carbon steel was explored. The results showed that the inhibition performance of all studied molecules increased with increasing inhibitor concentration and decreasing solution temperature. Theoretical studies were in good agreement with experimental observations.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Biochemistry & Molecular Biology
Carlos Cevallos-Morillo, Pablo Cisneros-Perez, Roxana Llive, Marvin Ricaurte, Carlos Reinoso, Miguel Angel Meneses, Maria del Cisne Guaman, Alex Palma-Cando
Summary: Croton lechleri, also known as Dragon's blood, is a tree cultivated in the northwest Amazon rainforest of Ecuador and Peru that produces a deep red latex containing natural compounds effective as corrosion inhibitors for admiralty brass. The study found that chloroform alkaloid-rich extracts from the latex formed a layer of organic compounds on the brass surface, hindering the dezincification process and resulting in a corrosion inhibition efficiency of 57% at 50 ppm. This research offers a novel approach in utilizing natural sources for the development of green corrosion inhibitors.
Article
Materials Science, Multidisciplinary
Evgeny Barmatov, Trevor Hughes
Summary: Schiff bases hydrolyze in aqueous solution due to the instability of the imine group. The inhibition imparted by Schiff base may be attributed to its hydrolysis products under acid conditions. A derivative of Schiff base obtained by reduction shows higher corrosion inhibition efficiency and is not degraded by hydrolysis.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Joshua Owen, Anne Neville, Evgeny Barmatov, Trevor Hughes, Richard Barker
Summary: A new staged acid corrosion inhibition (ACI) concept using polymerisable ACIs has been developed to minimize the corrosion of coiled tubing and wellbore casing materials during matrix acidizing operations. This approach, with a high ACI concentration in the initial stage and a reduced concentration in the later stage, can maintain good film persistency and low corrosion rates.
Article
Chemistry, Multidisciplinary
Lai Xuan Bach, Thi-Bich-Ngoc Dao, Trung T. Pham, Robert Sporken, Thi Nhung Nguyen, S. V. Prabhakar Vattikuti, Nhon Pham Van, Nam Nguyen Dang
Summary: This study proposes a new method to create a more robust thin film using SnO2 nanoparticles, which improves the corrosion resistance of carbon steel and results in a smooth and uniform protective layer. The presence of SnO2 in the protective layer directly influences the high inhibition performance.
Article
Materials Science, Multidisciplinary
Evgeny Barmatov, Federico La Terra, Trevor Hughes
Summary: Acetylenic alcohols are important film-forming corrosion inhibitors for carbon steel in hydrochloric acid. The degradation of acetylenic alcohols in HCl solution produces water-soluble products and water-insoluble polymers.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Raheem A. H. Al-Uqaily, Subhi A. H. Al-Bayaty, Anees A. Khadom, Mustafa M. Kadhim
Summary: The current study examined the inhibition performance of 4-Methoxyphenethylamine (MPTA) in 1 M HCl solution. Experimental investigations and theoretical and mathematical attempts were made to understand the relationship between chemical characteristics and inhibitor efficacy. Results showed that MPTA effectively suppressed the corrosion processes of low-carbon steel in acidic solution by adsorption on the metal surface, following a Langmuir adsorption isotherm. Theoretical analysis revealed that the inhibitory capabilities of MPTA were linked to the charge on the nitrogen atom and the net charges of the atoms in the cyclic ring.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Applied
Yasodha Sivasothy, Kok Hoong Leong, Kong Yong Loo, Siti Mariam Adbul Wahab, Muhamad Aqmal Othman, Khalijah Awang
Summary: Malabaricone C and Giganteone A show potential as antidiabetic agents by controlling glycemic levels, inhibiting oxidative stress, and acting as potent alpha-glucosidase inhibitors.
NATURAL PRODUCT RESEARCH
(2022)
Article
Chemistry, Applied
Pei Cee Lim, Zulfiqar Ali, Ikhlas A. Khan, Shabana Khan, Nur Kartinee Kassim, Khalijah Awang, Khozirah Shaari, Amin Ismail
Summary: A new conjugated sesquiterpene, amelicarin, was isolated from Melicope latifolia, showing anticancer activity against multiple cancer cell lines.
NATURAL PRODUCT RESEARCH
(2022)
Article
Biology
Dwi Winarni, Fitria Nikmatul Husna, Muhammad Farraz Syadzha, Raden Joko Kuncoroningrat Susilo, Suhailah Hayaza, Arif Nur Muhammad Ansori, Mochammad Amin Alamsjah, Muhamad Nur Ghoyatul Amin, Pugar Arga Christina Wulandari, Pratiwi Pudjiastuti, Khalijah Awang
Summary: This study found that the topical administration of the combination of Sargassum duplicatum and Garcinia mangostana extracts improved the open wound healing process in diabetic mice. The combination treatment promoted re-epithelialization and collagen synthesis in the wounded area, while reducing the number of neutrophils and macrophages.
Review
Chemistry, Multidisciplinary
Siew Suan Ng, Hooi Ling Lee, Pandian Bothi Raja, Ruey-an Doong
Summary: This review focuses on the application of optical biosensors for carcinoembryonic antigen (CEA) detection. Many nanomaterial-based biosensors have been developed as alternatives to traditional methods, but they have certain drawbacks. The advantages of optical biosensors, such as sensitivity and being free from interference, are discussed. The roles of nanomaterials in each application are summarized, and the challenges and future prospects are highlighted.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Review
Materials Science, Ceramics
J. Balaji, P. Bothi Raja, M. G. Sethuraman, T. H. Oh
Summary: This review discusses the application of sol-gel coatings for corrosion protection of copper. Sol-gel coatings are preferred over other types of metallic coatings due to their cost effectiveness, simple preparation methodology, and eco-friendliness.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
J. Balaji, S. Ghoreishiamiri, P. Bothi Raja, T. H. Oh, M. G. Sethuraman
Summary: Copper metal and its alloys, known for their excellent conductivity and natural corrosion protectiveness, are widely used in industries. This study explores the use of 2-amino-4-methyl-pyridine (AMP) as a self-assembled monolayer coating to enhance the corrosion resistance of copper metal. The results show that the formation of AMP's SAM layer on the copper surface improves the corrosion protection by forming a uniform thin adhesive compact layer and blocking corrosive chloride ions.
SURFACE REVIEW AND LETTERS
(2022)
Review
Public, Environmental & Occupational Health
Yasir Osman Ali Abdalla, Bavani Subramaniam, Shaik Nyamathulla, Noorasyikin Shamsuddin, Norhafiza M. Arshad, Kein Seong Mun, Khalijah Awang, Noor Hasima Nagoor
Summary: This review summarizes the anticancer potential of natural products that have been extensively studied in the past decade, including the analysis of their molecular targets and underlying mechanisms, as well as toxicological screening on animal models. Furthermore, it provides valuable insights for researchers in developing methods and strategies for the development of anticancer drugs.
JOURNAL OF TROPICAL MEDICINE
(2022)
Article
Chemistry, Medicinal
Wan N. Nazneem Wan Othman, Fatimah Salim, Nor N. Abdullah, Syahrul Abu Bakar, Khalijah Awang, Lalith Jayasinghe, Nor H. Ismail
Summary: In this study, a new alkaloid named (R)-13a alpha-densiindolizidine was isolated from the leaves of Cryptocarya densiflora Blume. The alkaloid exhibited binding interactions with crucial amino acid residues in the active sites of SARS-CoV-2 M-pro and RdRp, and met the ADMET criteria and Lipinsky's rule, indicating its potential as a lead compound.
NATURAL PRODUCT COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Noor Aimi Othman, Sook Yee Liew, Patricia Blanchard, Severina Derbre, Soon-Lim Chong, Abdul Manaf Ali, Khalijah Awang
Summary: Two indole alkaloids, (+)-neocadambine A (1) and (-)-nauclederine (2), isolated from the dichloromethane extract of Neolamarckia cadamba (Roxb.) Bosser, exhibited potent inhibition activity of advanced glycation end products (AGEs). (-)-Nauclederine showed stronger activity compared to the standard, aminoguanidine, and was isolated in the genus of Neolamarckia for the first time.
Review
Polymer Science
Husna Zolkepli, Riyanto Teguh Widodo, Syed Mahmood, Norazlinaliza Salim, Khalijah Awang, Noraini Ahmad, Rozana Othman
Summary: Diabetes mellitus is a common metabolic syndrome with a rising number of cases worldwide. Due to the side effects of modern antidiabetic drugs, plant extract-loaded nanoparticles have gained attention as alternative treatments. This review discusses various nanocarrier systems and highlights the effectiveness of metallic nanoparticles. The main challenges in formulating plant-based nanocarriers are the loading capacity and stability.
Article
Chemistry, Analytical
Ahmad Husaini Mohamed, Noorfatimah Yahaya, Sharifah Mohamad, Sazlinda Kamaruzaman, Hasnah Osman, Norikazu Nishiyama, Yuichiro Hirota
Summary: This study reports the development of a magnetic-carboxymethyl cellulose nanofiber composite as a promising adsorbent for the determination of organophosphorus pesticides in water samples. The prepared adsorbent showed a high affinity towards the target analytes and achieved high sensitivity and selectivity. The method was successfully applied to detect organophosphorus pesticide residues in real water samples.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Analytical
Norfaizah Osman, Azeana Zahari, Hazrina Hazni, Wan Nurul Nazneem Wan Othman, Nurulfazlina Edayah Rasol, Nor Hadiani Ismail, Pierre Champy, Mehdi A. Beniddir, Marc Litaudon, Khalijah Awang
Summary: Phytochemical investigation of the dichloromethane crude extract from the bark of Ochreinauclea maingayi using LCMS/MS-based molecular networking led to the isolation and identification of known and new indole alkaloids. The molecular networking analysis identified different clusters and nodes representing various compounds. By analyzing each cluster and node, it was determined that indole alkaloids are of interest, particularly those found between F5 and F10. Nine indole alkaloids were successfully purified and their structures confirmed using various analytical techniques. The presence of unannotated ions suggests the possibility of novel compounds yet to be discovered.
Review
Chemistry, Analytical
Ahmad Husaini Mohamed, Nur Athirah Noorhisham, Noorfatimah Yahaya, Sharifah Mohamad, Sazlinda Kamaruzzaman, Hasnah Osman, Hassan Y. Aboul-Enein
Summary: Despite the benefits of organophosphorus pesticides (OPPs) in controlling diseases and insects, their accumulation in the soil system can pose a serious threat to ecosystems and human health. It is crucial to isolate and preconcentrate OPPs from the soil matrix to achieve reliable detection due to low residue levels and the complexity of the soil. Sample preparation techniques have been reported to improve analytical measurements, including recovery, precision, detection limit, and quantification limit. The efficiency of extraction depends on the interaction between OPPs and the extraction media.
CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY
(2023)
Article
Parasitology
M. N. Azmi, N. S. Hasmaruddin, N. A. Mat Ali, H. Osman, S. Mohamad, T. Parumasivam, M. Z. Hassan, M. S. Abd Ghani, K. Awang
Summary: A series of new 2,5-disubstituted-1,3,4-oxadiazole derivatives have been synthesized and characterized. Compound 5d exhibited the highest antibacterial activity against M. smegmatis and showed good synergy with isoniazid. Docking simulation suggested its potential as a pantothenate synthetase inhibitor.
TROPICAL BIOMEDICINE
(2022)
Article
Chemistry, Multidisciplinary
Nur Amirah Saad, Sharifah Mohammad, Mohamad Hafizi Abu Bakar, Mohammad Tasyriq Che Omar, Marc Litaudon, Khalijah Awang, Mohamad Nurul Azmi
Summary: This study isolated 11 cyclic polyketides from the bark of Endiandra kingiana and found that compounds 9 and 2 exhibited potent inhibition towards alpha-amylase, while compounds 10 and 5 demonstrated good inhibition towards alpha-glucosidase. Molecular docking examination confirmed the inhibitory reactions of these compounds with alpha-amylase and alpha-glucosidase enzymes.
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2022)
