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147 results on '"SHAMSUDDIN, MUSTAFFA"'

9. An Autocatalytic Model of a Pressurized Water Reactor in a Nuclear Power Generation

Author

Ashaari, Azmirul, Ahmad, Tahir, Shamsuddin, Mustaffa, Mohammad, Wan Munirah Wan, Diniz Junqueira Barbosa, Simone, Series editor, Chen, Phoebe, Series editor, Du, Xiaoyong, Series editor, Filipe, Joaquim, Series editor, Kara, Orhun, Series editor, Kotenko, Igor, Series editor, Liu, Ting, Series editor, Sivalingam, Krishna M., Series editor, Washio, Takashi, Series editor, Berry, Michael W., editor, Mohamed, Azlinah, editor, and Yap, Bee Wah, editor

Published
2015
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31. Green synthesis of silver nanoparticles using Diplazium esculentumextract: catalytic reduction of methylene blue and antibacterial activities

Author

Hadi, Atieya Abdul, Ng, Jia Ya, Shamsuddin, Mustaffa, Matmin, Juan, and Malek, Nik Ahmad Nizam Nik

Abstract

A green approach for the biosynthesis of silver nanoparticles (AgNPs) was developed using Diplazium esculentumaqueous extract as green reductant. The bio-stabilized AgNPs were characterized by UV–visible spectroscopy (UV–Vis), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), dynamic light scattering (DLS), and high-resolution transmission electron microscopy (HRTEM). The formation of AgNPs was indicated by the colour change and the absorption peak at 449 nm in the UV–Vis spectrum. FTIR spectral analysis suggested the possible biomolecules associated with the reduction of silver ions. The crystalline and face-centered cubic (fcc) structure of AgNPs was obtained by the XRD study. HRTEM analysis showed that the biosynthesized AgNPs composed of quasi-spherical, hexagonal, and ellipsoidal shapes with an average particle size of 23.385 ± 8.349 nm. The biosynthesized AgNPs exhibited good catalytic activity up to 91% reduction of Methylene blue (MB), which followed a reductive pathway rather than a photocatalytic route. The catalytic reduction follows a pseudo-first-order reaction with a rate constant of 0.1051 min-1. The disc diffusion technique (DDT) and minimal inhibitory concentration (MIC) results showed significant antibacterial capability against Gram-positive (Escherichia coliATCC 11,229) and Gram-negative (Staphylococcus aureusATCC 6538) bacteria.

Published
2021
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34. Crystal structure of bis­(aceto­phenone 4-benzoyl­thio­semicarbazonato-κ2 N1,S)nickel(II)

Author

Kadir, Faraidoon Karim, Shamsuddin, Mustaffa, Rosli, Mohd Mustaqim, Kadir, Faraidoon Karim, Shamsuddin, Mustaffa, and Rosli, Mohd Mustaqim

Abstract

In the asymmetric unit of the title complex, [Ni(C16H14N3OS)2], the nickel ion is tetracoordinated in a distorted square-planar geometry by two independent molecules of the ligand which act as mononegative bidentate N,S-donors and form two five-membered chelate rings. The ligands are in trans (E) conformations with respect to the C N bonds. The close approach of hydrogen atoms to the Ni2+ atom suggests anagostic interactions (Ni� � �H—C) are present. The crystal structure is built up by a network of two C—H� � �O interactions. One of the interactions forms inversion dimers and the other links the molecules into infinite chains parallel to [100]. In addition, a weak C—H� � �� interaction is also present.

Published
2016

35. Crystal structure of bis(acetophenone 4-benzoylthiosemicarbazonato- j2N1,S)nickel(II)

Author

Kadir, Faraidoon Karim, Shamsuddin, Mustaffa, Rosli, Mohd Mustaqim, Kadir, Faraidoon Karim, Shamsuddin, Mustaffa, and Rosli, Mohd Mustaqim

Abstract

In the asymmetric unit of the title complex, [Ni(C16H14N3OS)2], the nickel ion is tetracoordinated in a distorted square-planar geometry by two independent molecules of the ligand which act as mononegative bidentate N,S-donors and form two five-membered chelate rings. The ligands are in trans (E) conformations with respect to the C N bonds. The close approach of hydrogen atoms to the Ni2+ atom suggests anagostic interactions (Ni� � �H—C) are present. The crystal structure is built up by a network of two C—H� � �O interactions. One of the interactions forms inversion dimers and the other links the molecules into infinite chains parallel to [100]. In addition, a weak C—H� � �� interaction is also present.

Published
2016

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