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Somasundaram, G.
- Investigations on Aluminium wire mesh, Banana Fiber and Glass Fiber Reinforced Hybrid Composites
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Authors
A. Thirumurugan
1,
G. B. Bhaskar
2,
K. Poyyathappan
1,
R. Jai Karthik
2,
M. Kishore Kumar
2,
G. Somasundaram
2,
G. Venkatakrishnan
2
Affiliations
1 Department of Mechanical Engineering, Thiruvalluvar College of Engineering and Technology, Vandavasi - 604505, Tamil Nadu, IN
2 Department of Production Technology, Madras Institute of Technology, Anna University, Chennai - 600044, Tamil Nadu, IN
1 Department of Mechanical Engineering, Thiruvalluvar College of Engineering and Technology, Vandavasi - 604505, Tamil Nadu, IN
2 Department of Production Technology, Madras Institute of Technology, Anna University, Chennai - 600044, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 42 (2016), Pagination:Abstract
Objectives: In the fiber metal laminates aluminium has been preferred choice when it comes to the selection of the type of metal to be used as reinforcement in FML, due to its easy of availability, favourable mix of mechanical characteristics and low cost. Among fibers, glass has been found out to be most reliable as it is cheaper than its counterparts, and at the same time does not compromise on its mechanical properties. Methods: The hand-layup process is employed to fabricate two types of composites: a normal GFRP and a GFRP hybrid. The hybrid, named GABGRP (glass-aluminium-banana-glassreinforced plastic) comprises of layers of both aluminium and banana fibers as reinforcements in a glass fiber-base. The aluminium in this study has been employed in two different forms: foil and wire mesh. The GABGRP has been fabricated, and subjected to material testing to find out aluminium in which form, aluminium is more suitable as a reinforcement. The fabricated materials are cut in accordance to ASTM standards and are subjected to various mechanical tests, namely tensile, flexural, impact and hardness tests. Findings: The investigation conducted on Glass-Aluminium Foil/Wire Mesh- Banana Fibre-Glass Hybrid Composites, it has been inferred that the GABGRP (with Al wire mesh) hybrid composite has the highest flexural strength among its counterparts. Also, the GABGRP (with Al wire mesh) hybrid composite has the highest tensile load capacity when compared with the other two composite types. GABGRP hybrid also has a higher toughness value than the standard GFRP. GABGRP (with Al wire mesh) also exhibits a lower hardness value, which shows that it is less brittle. Thus, it is inferred that the inclusion of banana fibers and aluminium wire mesh as reinforcements in GFRP hybrid composites influences its mechanical properties. Improvement/Applications: The inclusion of aluminium as wire mesh and banana fibers in GFRP that influences its mechanical properties, contributing towards a higher flexibility, ductility, impact and tensile properties.Keywords
Aluminium Foil, Aluminium Wire Mesh, Banana Fibres, Fiber Metal Laminates (FML), GABGRP (Glass- Aluminium-Banana-Glass-Reinforced Plastic), Glass Fiber Reinforced Plastic (GFRP).Full Text
- Evaluation of Hepatoprotective Activity of Ethanolic Extract of Aerial Parts of Premna tomentosa against Paracetamol-Induced Liver Toxicity on Wistar Rats
Abstract Views :524 |
PDF Views:0
Authors
Affiliations
1 Dept. of Pharmacology, Mahatma Gandhi Medical College & Research Institute, Puducherry, IN
1 Dept. of Pharmacology, Mahatma Gandhi Medical College & Research Institute, Puducherry, IN
Source
Toxicology International (Formerly Indian Journal of Toxicology), Vol 23, No 2 (2016), Pagination: 112-121Abstract
Hepatoprotective activity of ethanolic extract of aerial parts of Premna tomentosa were evaluated against paracetamol-induced liver toxicity and comparison to the standard hepatoprotectant, silymarin. Thirty male wistar albino rats were randomised into five groups with six rats in each group. Group A&B sereved as normal control and toxic control respectively, and were administered normal saline. Group C& D were treated with ethanolic extract of Premna tomentosa at doses 100mg/kg and 200mg/kg respectively. Group E was treated with the standard drug Silymarin 25mg/kg. Toxicity was induced in all the groups except the first by giving Paracetamol at 2g/kg on the 5th day. All the rats were treated for 7 days and after the last dosing the rats were fasted for 24hrs and sacrificed. Serum was sent for biochemical analysis for assaying liver profile. Histopathology and antioxidant studies were done on liver. In our study ethanolic extract Premna tomentosa showed beneficial effect on paracetamol induced liver toxicity which was evident by the significant improvement in liver profile consisting of AST, ALT, ALP, GGT, total cholesterol, total protein, triglycerides and total bilirubin in a dose dependent manner, which is consistent with the histopathological findings. Increase in GSH and Catalase and decrease in TBARS validates the antioxidant property of the extract. The study has proved that Premna tomentosa posses a significant hepatoprotective activity which was comparable to the standard drug silymarin. It warrants further study in humans before including it in the prevention of hepatotoxicity.Keywords
Premna tomentosa, Paracetamol, Hepatoprotective, Antioxidant.
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