KAZIM SHAMIM RIZVI, P. K. DUTTA

Journal of Polymer Materials, Vol.36, No.3, pp. 217-228, 2019, DOI:10.32381/JPM.2019.36.03.2

Abstract In this investigation we have shown the preparation of carboxylic acid containing new chromophore : 4-(3-(4-nitrophenyl) thioureido) benzoic acid and its use.The chemical modification of chitosan, e.g., chitosan- acid salt complexes is done under mild conditions. The synthesis of chromophore was carried out by conventional methods and the novel polymer complex was soluble in most of the organic solvents. The modified chitosan was analyzed by various techniques like optical properties by UV and SHG spectroscopy which showed red shift. The antibacterial activity showed obvious effect against food pathogenic bacteria. More >

KAZIM SHAMIM RIZVI, P.K.DUTTA^*

Journal of Polymer Materials, Vol.36, No.1, pp. 75-85, 2019, DOI:10.32381/JPM.2019.36.01.6

Abstract The present investigation deals with the preparation of carboxylic acid containing new chromophore : 4-2-(2-hydroxy-5-(4-nitrophenyl) diazenyl) benzylidene) hydrazinyl) benzoic acid and its use for chemical modification of chitosan, e.g., chitosan-acid salt complexes under mild conditions. Optical properties of chitosan acid complexes were evaluated by UV and SHG spectroscopy which showed red shift. Antibacterial activity of prepared chitosan acid complexes showed obvious effect against food pathogenic bacteria. The novel polymer complex was soluble in most of the organic solvents. More >

ELIF ANT BURSALI^1,*, DILER ABACI¹, MURAT KIZIL², MURUVVET YURDAKOC¹

Journal of Polymer Materials, Vol.38, No.3-4, pp. 231-245, 2021, DOI:10.32381/JPM.2021.38.3-4.5

Abstract Genipin cross-linked/boron doped starch/polyvinily alcohol (PVA) based hydrogel (SH-GNP-B) was synthesized as a new material having antimicrobial and antioxidant activity. The prepared hydrogel was characterized by X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Thermal Gravimetric Analysis (TGA) and Scanning Electron Microscope (SEM) methods and evaluated for in vitro antimicrobial activities against selected organisms by disc diffusion tests. The antioxidant activity of the prepared hydrogels was evaluated using 2,2-diphenyl-1- picrylhydrazyl radical scavenging assays. Swelling behavior of the hydrogel was also investigated. The synthesized hydrogel was thermally stable and showed pH independent swelling tendency. SH-GNP-B hydrogel was found to have antimicrobial… More >

Kakudji Kisimba¹, Anand Krishnan^2,*, Mbuso Faya¹, Kahumba Byanga³, Kabange Kasumbwe⁴, Kaliyapillai Vijayakumar⁵, Ram Prasad^6,*

Journal of Renewable Materials, Vol.11, No.6, pp. 2575-2591, 2023, DOI:10.32604/jrm.2023.026159

Abstract Nanoparticles have distinct properties that make them potentially valuable in a variety of industries. As a result, emerging approaches for the manufacture of nanoparticles are gaining a lot of scientific interest. The biological pathway of nanoparticle synthesis has been suggested as an effective, affordable, and environmentally safe method. Synthesis of nanoparticles through physical and chemical processes uses unsafe materials, expensive equipment and adversely affects the environment. As a result, in order to support the increased utilization of nanoparticles across many sectors, nanotechnology research activities have shifted toward environmentally safe and cost-effective techniques that outperform chemical and/or biological procedures. The use… More > Graphic Abstract

S.K. Pankaj¹, C. Bueno-Ferrer¹, N.N. Misra¹, L. O’Neill², A. Jiménez³, P. Bourke¹, P.J. Cullen^1,4,*

Journal of Renewable Materials, Vol.2, No.1, pp. 77-84, 2014, DOI:10.7569/JRM.2013.634129

Abstract The effects of dielectric barrier discharge plasma treatment on zein fi lm containing thymol as an active ingredient were evaluated. The plasma discharge was optically characterized to identify the reactive species. A signifi cant increase in the fi lm roughness (p < 0.05) was observed due to the etching effect of DBD plasma, which was correlated with the increase in the diffusion rate of thymol in the food simulant. The diffusion of thymol from the zein fi lm was measured in aqueous solution. The kinetics of thymol release followed the Fick’s law of diffusion as shown by the high correlation… More >

Naima Asghar¹, Abida Aziz¹, Muhammad Farooq Azhar² , Mohamed El-Sharnouby³, Uzma Irfan¹, Iqra Rafiq¹, Husnain Farooq^4,5,*, Muhammad Ishaq Asif Rehmani⁶, Mohamed I. Sakran⁷, A. Altalhi⁸, Fahad M. Alzuaibr⁹, Ayman El Sabagh^10,*

Phyton-International Journal of Experimental Botany, Vol.91, No.8, pp. 1817-1829, 2022, DOI:10.32604/phyton.2022.020790

Abstract Moringa oleifera is a miracle plant rich in nutrients, antioxidants, and antibiotic properties. Present study was designed to evaluate various biochemical attributes of leaves and flowers of M. oleifera. Plant parts (leaves, flowers) of M. oleifera, collected from different roadsides of Multan district, Punjab, Pakistan, were used as experimental material. Result indicates that alkaloids, saponin, carbohydrates, fats, and protein had a high value in the aqueous extract of both leaves and flowers of M. oleifera. Whereas phenol content was high in methanolic leaves extract and the phenol contents were high in aqueous extract of flowers. The extract yield of M.… More >

Ayda Khadhri¹, Chedia Aouadhi², Eric Masson³, Antonio Pizzi^4,5,*

Journal of Renewable Materials, Vol.10, No.6, pp. 1607-1621, 2022, DOI:10.32604/jrm.2022.018950

Abstract Salvia microphylla and Teucrium polium are medicinal and aromatic plants with ethnobotanical uses. The present study was conducted to investigate the chemical composition of Salvia microphylla and Teucrium polium essential oils, the secondary metabolites, and the biological activities of their infusion and methanolic (MeOH) extracts. Essential oils were extracted by hydrodistillation from shoots Salvia microphylla and Teucrium polium. Phenolic content, antioxidant and antimicrobial activities were determined. Gas chromatography-mass spectrometry (GC-MS) results showed the presence of significant qualitative and quantitative variations for the composition of the both essential oils (EO). Salvia microphylla EO were most complex and present 70 compounds with… More >

JELAN MOFEED^1,2, MOHAMED DEYAB³, ABDELNASER MOHAMED³, MAHMOUD MOUSTAFA^4,5, SALLY NEGM^6,7, EMAD EL-BILAWY¹

BIOCELL, Vol.46, No.1, pp. 247-261, 2022, DOI:10.32604/biocell.2022.015966

Abstract

Microbial infections cause complicated health influences along with bad economic impacts. In the present investigation, three dominant seaweeds namely, Amphiroa anceps, Corallina officinalis and Sargassum filipendula were collected from different Egyptian sites at the Red Sea and Mediterranean Sea during autumn 2019. Organic extracts of the three algae were screened for their antibacterial activity against three pathogenic bacteria Salmonella typhiimurium, Staphylococcus aureus and Escherichia coli, in addition to in vitro antiviral activity against Rotavirus (RV), and Coxsackie virus B3 (CVB3) that cause severe diseases in human. Organic extract of A. anceps, C. officinalis and S. filipendula inhibit E. coli cells… More >

Judith Constantino-Alcazar¹, Miguel Abud-Archila¹, Benjamín Valdez-Salas³, Federico Gutierrez-Miceli¹, Carlos Ceceña-Duran², Blanca López-Valenzuela², Daniel Gonzalez-Mendoza^2,*,*

Journal of Renewable Materials, Vol.9, No.10, pp. 1699-1706, 2021, DOI:10.32604/jrm.2021.015645

Abstract In the present study, the green synthesis of potassium nanoparticles (K-NPs) was assessed using aqueous extract of Sideroxylon capiri. The potassium nanoparticles were analyzed by UV-visible spectroscopic techniques, X-ray spectrometers of energy dispersive (SEM-EDS) and dynamic light scattering. The results showed high values at 3.5 keV confirming the formation of potassium nanoparticles and the SEM analysis showed an agglomerated particles size between 360 to 200 nm with a spherical morphology. The K-NPs showed an effective antibacterial activity against the test organisms mainly with Bacillus cereus, Enterobacter aerogenes, Fusarium solani and Botrytis cinerea. However further studies about nanotoxicity of K-NPs are… More >

Suzana Vieira Rabêlo¹, Fernanda Granja da Silva Oliveira², Michele Miriam Calixto de Lira³, Livia Macedo Dutra³, Adilson Sartoratto⁴, Marta Cristina Teixeira Duarte⁴, Maria Claudia dos Santos Luciano⁵, Maria Francilene Souza Silva⁵, Cláudia do Ó Pessoa⁵, Manoel Odorico de Moraes Filho⁵, Emmanoel Vilaça Costa⁶, Jackson Roberto Guedes da Silva Almeida^1,3,*

Phyton-International Journal of Experimental Botany, Vol.90, No.3, pp. 921-931, 2021, DOI:10.32604/phyton.2021.013305

Abstract This study aimed to identify the chemical composition of essential oil from fruits (EOAF) and the hexanic crude extract from aerial parts (At-Hex) of atemoya (Annona cherimola x Annona squamosa), a hybrid belonging to the Annonaceae family. Cytotoxic and antimicrobial activity was also evaluated. OEAF was obtained by hydrodistillation using a Clevenger apparatus, and their composition was analyzed by gas chromatography-mass spectrometry (GC-MS) analyses. Cytotoxicity was tested against human tumor cell lines HCT-116 (colon carcinoma), SF-295 (glioblastoma), OVCAR-8 (ovarian carcinoma) and HL60 (leukemia) using 3-(4,5-dimethyl-2-thiazolyl)-2,5- diphenyl-2H-tetrazolium bromide (MTT) assay, while antimicrobial activity was conducted by bioauthography method against eleven microorganisms… More >