Browsing Research Articles (Chemistry) by Title

1D NiHPO4 nanotubes prepared using dissolution equilibrium as bifunctional electrocatalyst for high-efficiency water splitting

Ji, Shan; Wang, Zining; Wu, Yutai (Journal of Power Sources, 2021)

In this work, one-dimensional NiHPO4 nanotubes are successfully fabricated on nickel foam by hydrothermal reaction, in which a dissolution equilibrium between phosphates is controlled by tuning the proportion of the mixed ...

2-Arylnaphthoquinone analogues: Potential anti-TB and pro-apoptotic agents

Green, Ivan R; Sagar, Sunil; Swigelaar, Wendell (Green, I. R. et al. (2011). 2-Arylnaphthoquinone analogues: Potential anti-TB and pro-apoptotic agents. ARKIVOC, (x), 192-212. https://doi.org/10.3998/ark.5550190.0012.a16, 2011)

A useful library of substituted 2-arylnaphthoquinones prepared by reaction between the corresponding bromonaphthoquinones and arylboronic acids via Suzuki-Miyaura protocols has been established. Conversion of some of the ...

4-(Dimethylamino)pyridinium chlorosulfonate: A new ionic liquid exhibiting chlorosulfonic acid action as monoprotic Brönsted acid and no sulfonating reagent

Titinchi, Salam (Journal of Molecular Liquids, 2021)

Many papers considered chlorosulfonic acid as a sulfonating and sulfating agent, whereas our previous work and a few reports showed it acts as a monoprotic Brönsted acid. Therefore, in the present work, we decided to respond ...

4-Oxatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione derivatives as NMDA receptor- and VGCC blockers with neuroprotective potential

Egunlusi, Ayodeji O; Omoruyi, Sylvester I; Malan, Sarel F (MDPI, 2020)

The impact of excitotoxicity mediated by N-methyl-D-aspartate (NMDA) receptor overactivation and voltage gated calcium channel (VGCC) depolarization is prominent among the postulated processes involved in the development ...

Abundance of no3 derived organo-nitrates and their importance in the atmosphere

Foulds, Amy; Khan, M. Anwar H.; Shallcross, Dudley E. (MPDI, 2021)

The chemistry of the nitrate radical and its contribution to organo-nitrate formation in the troposphere has been investigated using a mesoscale 3-D chemistry and transport model, WRFChem-CRI. The model-measurement ...

Actuation behaviour of a derivatized pyrrole accordion type polymer

Ward, Meryck; Botha, Shanielle; Iwuoha, Emmanuel I.; Baker, Priscilla (ESG, 2014)

A monomer (Phenazine-2,3-diimino(pyrrole-2-yl)–PDP) derived from the condensation reaction between 2,3-diaminophenazine and a pyrrole derivative has been synthesized as a hinge molecule in the design of a zig-zag polymer. ...

Acylation of anisole with benzoyl chloride over rapidly synthesized fly ash–based hbea zeolite

Ameh, Alechine E.; Musyoka, Nicholas M.; Oyekola, Oluwaseun (Frontiers Media, 2021)

Stable HBEA zeolite with high surface area and strong acid sites was synthesized from coal fly ash–based silica extract via indirect hydrothermal synthesis. The rapid HBEA hydrothermal crystallization times of 8, 10, and ...

Acylphloroglucinol derivatives from the South African helichrysum niveum and their biological activities

Popoola, Olugbenga K.; Marnewick, Jeanine L.; Rautenbach, Fanie; Iwuoha, Emmanuel I.; Hussein, Ahmed A. (MDPI, 2015)

Abstract: Phytochemical investigation of aerial parts of Helichrysum niveum (H. niveum) using different chromatographic methods including semi-preparative HPLC afforded three new (1–3) and six known (4–10) acylphloroglucinols ...

Advances in nanotechnology towards development of silver nanoparticle-based wound-healing agents

Nqakala, Zimkhitha B.; Sibuyi, Nicole R. S.; Fadaka, Adewale O. (MPDI, 2021)

Since antiquity, silver-based therapies have been used in wound healing, wound care and management of infections to provide adequate healing. These therapies are associated with certain limitations, such as toxicity, ...

Aerosol mass and size‑resolved metal content in urban Bangkok, Thailand

Matthews, James C.; Navasumrit, Panida; Shallcross, Dudley E. (Springer, 2022)

Inhalable particulate matter (PM) is a health concern, and people living in large cities such as Bangkok are exposed to high concentrations. This exposure has been linked to respiratory and cardiac diseases and cancers ...

Alpha-glucosidase and alpha-amylase inhibitory activities, molecular docking, and antioxidant capacities of plectranthus ecklonii constituents

Etsassala, Ninon G. E. R.; Badmus, Jelili A.; Iwuoha, Emmanuel. I. (MDPI, 2022)

Shortage in insulin secretion or degradation of produced insulin is the principal characteristic of the metabolic disorder of diabetes mellitus (DM). However, because the current medications for the treatment of DM have ...

Alpha-glucosidase and alpha-amylase inhibitory activities, molecular docking, and antioxidant capacities of salvia aurita constituents

Etsassala, Ninon G.E.R.; Badmus, Jelili A.; Marnewick, Jeanine L. (MPDI, 2020)

Diabetes mellitus (DM) is one of the most dangerous metabolic diseases with a high rate of mortality worldwide. It is well known that insulin resistance and deficiency in insulin production from pancreatic β-cells are the ...

Amorphous Pt@dCu/CNT catalyst for methanol elextrooxidation

Wang, Hui; Ji, Shan; Wang, Wei; Wang, Rongfang (South African Chemical Institute (SACI), 2013)

A multi-walled carbon nanotube-supported, Pt decorated nano-sized amorphous PdCu alloy cores (denoted as Pt@PdCu/CNT) catalyst with lower Pt loading is synthesized via a galvanic displacement reaction. The structure is ...

Analyzing chemical data in more than two dimensions: A tutorial on factor and cluster analysis

Auf der Heyde, Thomas P. E (Journal of chemical education, 1990)

This tutorial is intended to introduce factor and cluster analysis at a level that will afford a senior student-and the practicing chemist, for that matter-some insights into the workings of the computer packages employing ...

Anode materials for lithium-ion batteries: A review

Iwuoha, E.I (Elsevier, 2022)

The need for eco-friendly and portable energy sources for application in electrical, electronic, automobile and even aerospace industries has led to an ever-increasing research and innovation in lithium-ion battery technology. ...

Antibacterial activities of bacteria isolated from the marine sponges Isodictya compressa and Higginsia bidentifera collected from Algoa Bay, South Africa

Matobole, Relebohile Matthew; van Zyl, Leonardo Joaquim; Parker-Nance, Shirley; Davies-Coleman, Michael T.; Trindade, Marla (MDPI AG, 2017)

Due to the rise inmulti-drug resistant pathogens and other diseases, there is renewed interest in marine sponge endosymbionts as a rich source of natural products (NPs). The South African marine environment is rich in ...