Search

Your search keyword '"Zafar Javed"' showing total 4 results
Start Over Author "Zafar Javed" Topic chemistry
4 results on '"Zafar Javed"'

1. Polyacrylonitrile Nanofibers Containing Viroblock as Promising Material for Protective Clothing

Author

Mujtaba Hussain, Abdul Salam, Muhammad Fahad Arain, Azeem Ullah, Anh-Tuan Dao, Hai Vu-Manh, Duy-Nam Phan, Aamir Shabbir Ansari, Muhammad Qamar Khan, Zafar Javed, and Ick-Soo Kim

Subjects
antimicrobial, antiviral, viroblock, nanofibers, cell viability, Technology, Engineering (General). Civil engineering (General), TA1-2040, Biology (General), QH301-705.5, Physics, QC1-999, Chemistry, QD1-999
Abstract

Antimicrobial viroblock/polyacrylonitrile nanofiber webs fabricated using the electrospinning method were assessed in terms of the antimicrobial activity against infectious agents as a potential material used in mask production. Viroblock (VB) is an amalgam of lipid vesicle and silver. Lipid vesicle depletes the virus outer membrane, which contains cholesterol, while silver ions penetrate the virus, interact with sulfur-bearing moieties, and possess the virus bactericidal property. VB, having anti-coronavirus and anti-influenza properties, was prepared in four different concentrations, 0.5 wt%, 1 wt%, 1.5 wt%, and 2 wt%, in regard to nanofiber weight. The resultant nanofibers were characterized by scanning electron microscope (SEM), Fourier transform infrared (FTIR), thermogravimetric analysis (TGA), water contact angle, water content, and thermogravimetric analysis (TGA). Moreover, all nanofibrous samples were evaluated for cell proliferation assay and ATCC antibacterial tests. Based on characterization results and cytotoxicity, the developed composite nanofibers-based webs showed good promise for utilization in anti-viral masks. Particularly, 2 wt% VB/PAN nanofibers have the highest antibacterial properties against negative and positive bacteria along with excellent cell viability.

Published
2021
Full Text
View/download PDF

2. EXPLORATION OF IN VIVO ANTIOXIDANT ACTIVITY OF 50% ETHANOLIC EXTRACT OF SESAMUM INDICUM L. SEED AGAINST HIGH FAT DIET INDUCED RATS

Author

Zafar Javed Khan and N. A. Khan

Subjects
Antioxidant, biology, Traditional medicine, medicine.medical_treatment, Pharmaceutical Science, Glutathione, biology.organism_classification, medicine.disease_cause, Superoxide dismutase, Lipid peroxidation, chemistry.chemical_compound, chemistry, Catalase, biology.protein, medicine, Sesamum, Oxidative stress, Peroxidase
Abstract

Objective: The aim of the present study was to investigate the in vivo antioxidant potential of 50% ethanolic extract of Sesamum indicum against high-fat diet-induced rats. Methods: Animals were treated with plant extract for 30 d, and a high-fat diet was given to all groups except plain control, throughout, out the study. And alpha-tocopherol acetate (Vit, E) was used as standard. Pre-treatment with 16 mg/100 gm of body weight of 50% ethanolic extract of Sesamum indicum improved the Superoxide dismutase, catalase, glutathione, and lipid peroxidation levels significantly as compared to control group. Results: The present studies revealed that Sesamum indicum has significant in vivo antioxidant activity and can be used to protect tissue from oxidative stress. The result showed that the activities of SOD, catalase, lipid peroxidase, and glutathione, in the group treated with high-fat diet declined significantly than that of normal group. Conclusion: 50% ethanolic extract of in the dose of Sesamum indicum 16 mg/100 gm of body weight, has improved the SOD, catalase, glutathione, and lipid peroxidase levels significantly, which were comparable with high-fat-diet-induced rats. Based on this study we conclude that the 50% ethanolic extract of Sesamum indicum possesses in vivo antioxidant activity and can be employed in protecting tissue from oxidative stress.

Published
2019

3. Enhanced interlaminar shear and impact performance of woven carbon/epoxy composites interleaved with needle punched high performance polyethylene fiber nonwoven

Author

Ahsan Ahmad, Yasir Nawab, Abdul Jabbar, Zafar Javed, Muhammad Adnan, and Muhammad Irfan

Subjects
Materials science, Polymers and Plastics, chemistry.chemical_element, Thermosetting polymer, General Chemistry, Epoxy, Polyethylene, Surfaces, Coatings and Films, chemistry.chemical_compound, Interlaminar shear, chemistry, visual_art, Materials Chemistry, visual_art.visual_art_medium, Fiber, Composite material, Carbon
Published
2021

4. Electrical Conductivity of PLA Films Reinforced With Carbon Nano Particles from Waste Acrylic Fibers

Author

Jakub Wiener, Syed Qummer Zia Gilani, Vijay Baheti, Saima Javed, Jiri Militky, Salman Naeem, Zafar Javed, Azam Ali, and Syed Zameer Ul Hassan

Subjects
Materials science, Carbonization, Composite number, Nanoparticle, chemistry.chemical_element, Crystallinity, chemistry, Electrical resistivity and conductivity, medicine, Composite material, Ball mill, Carbon, Activated carbon, medicine.drug
Abstract

The acrylic fibrous waste was effectively transformed into activated carbon through physical activation in single stage carbonization under charcoal using at different carbonization temperatures 800, 1000 and 1200 °C. The characterization of carbonized fibers was performed with the help of XRD and EDX in order to find out the degree of crystallinity and proportion of different elements in carbonized fibres prepared at different temperatures. Later on, the carbonized fibers were pulverized in dry conditions by high energy planetary ball milling to get activated carbon micro/nano particles. In addition to refinement of size, the electrical conductivity of pulverized carbon particles was found to increase with increase in milling time. Subsequently, the particles were incorporated into poly lactic acid (PLA) in different loadings from 1 to 10% to develop conductive green composite films. The composite films were then characterized for electrical, thermo-mechanical and thermal properties.

Published
2017

Catalog

Books, media, physical & digital resources
See catalog results