Md. Shameem Ahsan - Academia.edu (original) (raw)

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Papers by Md. Shameem Ahsan

Research paper thumbnail of Modified alginate-based soft tissue adhesive: Synthesis, characterization, and application in the treatment of in vivo wound closure

International Journal of Adhesion and Adhesives

Research paper thumbnail of Chitosan-based nano-sorbents: synthesis, surface modification, characterisation and application in Cd (II), Co (II), Cu (II) and Pb (II) ions removal from wastewater

Scientific Reports

In contemplation of treating hazardous industrial wastewater, sodium tripolyphosphate (TPP) and v... more In contemplation of treating hazardous industrial wastewater, sodium tripolyphosphate (TPP) and vanillin (V)-modified chitosan-based magnetic nano-sorbents (TPP-CMN and V-CMN) were prepared, and the physical and surface properties of both nano-sorbents were characterised. The results of FE-SEM and XRD showed an average size of between 6.50 and 17.61 nm for Fe3O4 magnetic nanoparticles. The Physical Property Measurement System (PPMS) was carried out, and the saturation magnetisations for chitosan, Fe3O4 nanoparticles, TPP-CMN, and V-CMN were 0.153, 67.844, 7.211, and 7.772 emu.g−1, respectively. By using multi-point analysis, the BET surface areas of the synthesised TPP-CMN and V-CMN nano-sorbents were found to be 8.75 and 6.96 m2/g, respectively. The synthesised TPP-CMN and V-CMN were investigated as effective nano-sorbents to uptake Cd (II), Co (II), Cu (II), and Pb (II) ions, and the results were investigated by AAS. The adsorption process of heavy metals was investigated by the b...

Research paper thumbnail of Hydrothermal synthesis of cobalt substitute zinc-ferrite (Co1-xZnxFe2O4) nanodot, functionalised by polyaniline with enhanced photocatalytic activity under visible light irradiation

Research paper thumbnail of Optimization of submerged steady-state fermentation process for glucose oxidase production by Aspergillus niger isolated from local environment

Journal of BioScience and Biotechnology, 2020

Glucose oxidase (GOX) is an enzyme with large scale applications in various industries as a biose... more Glucose oxidase (GOX) is an enzyme with large scale applications in various industries as a biosensor for the detection of the glucose level of body fluids. The present study aims to optimize the cost-effective steady-state fermentation process for the maximum production of glucose oxidase by Aspergillus niger isolated from a locally contaminated onion. For low-cost enzyme production, the possibility of a submerged steady-state fermentation process was evaluated. The enzyme production was assessed by using local low-cost saccharose (C12H22O11) as carbon source and sodium nitrate (NaNO3) as the nitrogen source. Effect of peptone and urea on GOX production by A. nigerwere also examined. The initial pH for the optimal production of GOX was found 5.5. The addition of K+in fermentation medium increases enzyme activity while Mg2+was found to inhibit glucose oxidase production by A. niger. Although Ferric ion (Fe3+) showed the highest GOX productivity,it forms reddish-brown colour which hi...

Research paper thumbnail of Recent Developments of Carboxymethyl Cellulose

Polymers, 2021

Carboxymethyl cellulose (CMC) is one of the most promising cellulose derivatives. Due to its char... more Carboxymethyl cellulose (CMC) is one of the most promising cellulose derivatives. Due to its characteristic surface properties, mechanical strength, tunable hydrophilicity, viscous properties, availability and abundance of raw materials, low-cost synthesis process, and likewise many contrasting aspects, it is now widely used in various advanced application fields, for example, food, paper, textile, and pharmaceutical industries, biomedical engineering, wastewater treatment, energy production, and storage energy production, and storage and so on. Many research articles have been reported on CMC, depending on their sources and application fields. Thus, a comprehensive and well-organized review is in great demand that can provide an up-to-date and in-depth review on CMC. Herein, this review aims to provide compact information of the synthesis to the advanced applications of this material in various fields. Finally, this article covers the insights of future CMC research that could guid...

Research paper thumbnail of Preparation of uniform-sized agarose beads for affinity chromatography matrix

Research paper thumbnail of Physicochemical Properties and Fatty Acid Distribution Pattern in Lipids of Eutropiichthys vacha Hamilton-buchanan (Fam. Schilbeidae)

Pakistan Journal of Biological Sciences, 2002

Research paper thumbnail of Liquid crystalline compounds with various rigid siloxane frameworks

Reactive and Functional Polymers, 2007

Novel oligosiloxanes with mesogenic group were synthesized from tetrakis(dimethylsiloxy)silane (c... more Novel oligosiloxanes with mesogenic group were synthesized from tetrakis(dimethylsiloxy)silane (cross-structured), 1, 3, 5, 7-tetramethylcyclotetrasiloxane (cubic-structured), tetraphenyltetrahydroxycyclotetrasiloxane (cyclic-structured, having bulky phenyl group), tetrakis(dimethylsilyl)octaphenylsilsesquioxane (double-decker type), and hydride Q resin (branch structured) as cores and 4-allyloxy-4 0-cyanobiphenyl (M 1) and cholesteryl-10-undecenoate (M 2) as mesogenic derivatives via hydrosilylation reaction catalyzed by Karstedt's catalyst. The phase behaviors of these oligomeric compounds with various structures of the mesogenic group and the core were studied by differential scanning calorimetry (DSC), polarizing optical microscopy (POM) and X-ray diffraction (XRD) measurements. Liquid crystalline properties were observed for almost all of the synthesized oligomers in a wide temperature range.

Research paper thumbnail of Modified alginate-based soft tissue adhesive: Synthesis, characterization, and application in the treatment of in vivo wound closure

International Journal of Adhesion and Adhesives

Research paper thumbnail of Chitosan-based nano-sorbents: synthesis, surface modification, characterisation and application in Cd (II), Co (II), Cu (II) and Pb (II) ions removal from wastewater

Scientific Reports

In contemplation of treating hazardous industrial wastewater, sodium tripolyphosphate (TPP) and v... more In contemplation of treating hazardous industrial wastewater, sodium tripolyphosphate (TPP) and vanillin (V)-modified chitosan-based magnetic nano-sorbents (TPP-CMN and V-CMN) were prepared, and the physical and surface properties of both nano-sorbents were characterised. The results of FE-SEM and XRD showed an average size of between 6.50 and 17.61 nm for Fe3O4 magnetic nanoparticles. The Physical Property Measurement System (PPMS) was carried out, and the saturation magnetisations for chitosan, Fe3O4 nanoparticles, TPP-CMN, and V-CMN were 0.153, 67.844, 7.211, and 7.772 emu.g−1, respectively. By using multi-point analysis, the BET surface areas of the synthesised TPP-CMN and V-CMN nano-sorbents were found to be 8.75 and 6.96 m2/g, respectively. The synthesised TPP-CMN and V-CMN were investigated as effective nano-sorbents to uptake Cd (II), Co (II), Cu (II), and Pb (II) ions, and the results were investigated by AAS. The adsorption process of heavy metals was investigated by the b...

Research paper thumbnail of Hydrothermal synthesis of cobalt substitute zinc-ferrite (Co1-xZnxFe2O4) nanodot, functionalised by polyaniline with enhanced photocatalytic activity under visible light irradiation

Research paper thumbnail of Optimization of submerged steady-state fermentation process for glucose oxidase production by Aspergillus niger isolated from local environment

Journal of BioScience and Biotechnology, 2020

Glucose oxidase (GOX) is an enzyme with large scale applications in various industries as a biose... more Glucose oxidase (GOX) is an enzyme with large scale applications in various industries as a biosensor for the detection of the glucose level of body fluids. The present study aims to optimize the cost-effective steady-state fermentation process for the maximum production of glucose oxidase by Aspergillus niger isolated from a locally contaminated onion. For low-cost enzyme production, the possibility of a submerged steady-state fermentation process was evaluated. The enzyme production was assessed by using local low-cost saccharose (C12H22O11) as carbon source and sodium nitrate (NaNO3) as the nitrogen source. Effect of peptone and urea on GOX production by A. nigerwere also examined. The initial pH for the optimal production of GOX was found 5.5. The addition of K+in fermentation medium increases enzyme activity while Mg2+was found to inhibit glucose oxidase production by A. niger. Although Ferric ion (Fe3+) showed the highest GOX productivity,it forms reddish-brown colour which hi...

Research paper thumbnail of Recent Developments of Carboxymethyl Cellulose

Polymers, 2021

Carboxymethyl cellulose (CMC) is one of the most promising cellulose derivatives. Due to its char... more Carboxymethyl cellulose (CMC) is one of the most promising cellulose derivatives. Due to its characteristic surface properties, mechanical strength, tunable hydrophilicity, viscous properties, availability and abundance of raw materials, low-cost synthesis process, and likewise many contrasting aspects, it is now widely used in various advanced application fields, for example, food, paper, textile, and pharmaceutical industries, biomedical engineering, wastewater treatment, energy production, and storage energy production, and storage and so on. Many research articles have been reported on CMC, depending on their sources and application fields. Thus, a comprehensive and well-organized review is in great demand that can provide an up-to-date and in-depth review on CMC. Herein, this review aims to provide compact information of the synthesis to the advanced applications of this material in various fields. Finally, this article covers the insights of future CMC research that could guid...

Research paper thumbnail of Preparation of uniform-sized agarose beads for affinity chromatography matrix

Research paper thumbnail of Physicochemical Properties and Fatty Acid Distribution Pattern in Lipids of Eutropiichthys vacha Hamilton-buchanan (Fam. Schilbeidae)

Pakistan Journal of Biological Sciences, 2002

Research paper thumbnail of Liquid crystalline compounds with various rigid siloxane frameworks

Reactive and Functional Polymers, 2007

Novel oligosiloxanes with mesogenic group were synthesized from tetrakis(dimethylsiloxy)silane (c... more Novel oligosiloxanes with mesogenic group were synthesized from tetrakis(dimethylsiloxy)silane (cross-structured), 1, 3, 5, 7-tetramethylcyclotetrasiloxane (cubic-structured), tetraphenyltetrahydroxycyclotetrasiloxane (cyclic-structured, having bulky phenyl group), tetrakis(dimethylsilyl)octaphenylsilsesquioxane (double-decker type), and hydride Q resin (branch structured) as cores and 4-allyloxy-4 0-cyanobiphenyl (M 1) and cholesteryl-10-undecenoate (M 2) as mesogenic derivatives via hydrosilylation reaction catalyzed by Karstedt's catalyst. The phase behaviors of these oligomeric compounds with various structures of the mesogenic group and the core were studied by differential scanning calorimetry (DSC), polarizing optical microscopy (POM) and X-ray diffraction (XRD) measurements. Liquid crystalline properties were observed for almost all of the synthesized oligomers in a wide temperature range.