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Bajpai S.K.,P.A. College | Ahuja S.,P.A. College | Chand N.,AMPRI | Bajpai M.,P.A. College
International Journal of Biological Macromolecules | Year: 2017

With an aim to develop chitosan film with controllable swelling behavior and maximum antimicrobial efficacy, we hereby report cellulose nano crystals loaded chitosan films with Curcumin/Ag nano particles embedded as strong antimicrobial agents. The CNC had average size of 40–90 nm with poly dispersity index of 3.641. The TEM analysis of Ag NPs, produced via DMF reduction, revealed a particle size range of 15–25 nm. The Surface Plasmon resonance (SPR) of these Ag NPs shifted from 380 to 440 nm, with the increase in concentration of Ag (I). The TGA of the film samples Ch/CNC, and Ch/CNC (Ag463/Cur450) exhibited% weight loss of around 95 and 80 respectively, thus indicating higher stability due to presence of Ag NPs. In XRD analysis 2θ reflections at 38.12, 44.28 and 66.46° confirmed the presence planes (1 1), (2 0) and (2 0) respectively. In skin irritation test, the mean Erythema scores observed after 72 h was zero for both the Curcumin and Ag NPs/Curcumin loaded films. The percent wound reduction, observed for the film samples Ch/CNC (Cur450) and Ch/CNC (Ag NP463/Cur450) was 57.8 and 97.2 respectively, indicating better suitability of Ag NPs/Curcumin loaded film. © 2017 Elsevier B.V.

Rehman A.,M.A.N.I.T. | Das S.,A.M.P.R.I. | Dixit G.,M.A.N.I.T.
Tribology International | Year: 2012

The work reported here is to analyze the suitability of Aluminum alloySilicon Carbide MMC (Al-SiC MMC) in the automobile brake drum applications in comparison with cast iron (CI) brake drum. A brake drum dynamometer test rig was developed for the purpose. Al-SiC MMC was reinforced with 10% and 15% SiC particle by weight. The effect of heat treatment of the Al-SiC MMC brake drum was also studied. Performance was mainly evaluated on the basis of brake drum coefficient of friction (μ). Scanning electron microscope was also used to study the effect of braking on the sliding surface of the brake drum. © 2012 Elsevier Ltd. All rights reserved.

Morchhale R.K.,AMPRI | Waghmare S.S.,AMPRI | Goel M.D.,Advanced Materials and Processes | Murali S.,AMPRI
Indian Concrete Journal | Year: 2012

This paper presents a performance evaluation case study of a girder based on ultrasonic pulse velocity measurements. The exercise was undertaken to assess the uniformity and integrity of a concrete I-girder of Bridge no 135/4 on Bhopal-Jabalpur section of the National Highway 12. The findings from the field work and the procedure recommended for repair and rehabilitation are reported.

Morchhale R.K.,AMPRI | Waghmare S.S.,NEERI | Murali S.,AMPRI | Chaurasiya A.K.,Barkattullah University | Goel M.D.,Rashtrasant Tukadoji Maharaj Nagpur University
Indian Concrete Journal | Year: 2010

A 20-year old hospital building was investigated to assess the extent of damage and causes for structural deterioration. This study involved visual inspection, non-destructive testing and chemical analysis of materials collected from the building. The assessment based on the rebound hammer and ultrasonic pulse velocity tests indicated a poor quality of concrete. The detailed analysis of the core samples from specifically selected locations was carried out. A micro-cover meter study was also carried out to determine the reinforcement details of Reinforced Cement Concrete (RCC) members. The paper discusses the investigation details, test evaluation, theoretical analysis by STAAD-III software and recommendations for strengthening the building.

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