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Shanmugavasan A.,PSG College of Technology | Vaitheeswaran K.S.R.,Anna University | Ramachandran T.,PSG College of Technology | Ramachandran T.,Karpagam Institute of Technology
Journal of Analytical and Applied Pyrolysis | Year: 2011

Pyrolysis as an extraction method of phytochemicals from plant parts for medicinal applications is less explored. Practitioners of traditional Indian medicine use a process which is a crude equivalent of pyrolysis, to extract oily substances from stem parts of plants and use them in treatment of various ailments. In this study, a prototype pyrolyser is fabricated to simulate the traditional method and the stem part of Ziziphus jujuba is subjected to pyrolysis using the pyrolyser under controlled conditions. Based on the principle of applied pyrolysis, the engineering design is conceptualized and drawing for a prototype extractor is made. Material selection for the main reactor vessel and the heating system with controller is finalized. The prototype is fabricated. The oily extract obtained is compared with the extract from the traditional method for compositional identity and phyto chemistry to validate the process. The chemical similarities of the extracts from both methods establishes pyrolsis as the basic principle behind the traditional method and this validates the design of the pyrolyser. The FTIR and GC-MS analysis of the extracted oily substance from both methods reveals the presence of various cyclic, nitrogenous, long chain and heterocyclic compounds which are believed to be the pyrolysates of various cyclopeptide alkaloids reportedly present in the stem of Ziziphus jujuba. These phytochemicals have sedative property and are likely to be responsible for the curative nature of the oil used in the treatment of various human disorders and the research substantiates the stem's historical use by traditional practitioners. © 2011 Elsevier B.V. All rights reserved. Source


Shanmugavasan A.,PSG College of Technology | Ramachandran T.,Karpagam Institute of Technology
Journal of the Textile Association | Year: 2011

Compression bandage is made multi functional by coating micro encapsulated active plant extract on its surface which is an innovation. Compression therapy for treating lymphological and phlebological disorders uses compression bandage and its functionality is augmented with the coated microcapsules of oily stem extract of Ziziphus jujuba which is a herb used by the traditional practitioners for curing musculoskeletal disorders accompanied by massaging and fermentation. Aided by the sub-bandage pressure created by the compression bandage, the active molecules from the plant extract penetrate the skin and makes the bandage multifunctional and more effective in its curative ability. This is the postulation of this study. Surface coating and presence of microcapsules is confirmed by the microscopic analysis of the surface using scanning electron microscope. The coated bandage additionally displays antimicrobial activity against gram positive bacterium Staphylococcus aureus and therefore may resist microbial attack on the surface of the skin. FTIR studies indicate the presence of active functional groups in the extract. No significant change in the stretch of the fabric has been found after coating. Source


Vijayalakshmi D.,PSG College of Technology | Rathinamoorthy R.,PSG College of Technology | Ramachandran T.,Karpagam Institute of Technology
Journal of the Textile Association | Year: 2012

In this research work, a novel attempt has been made to impart multi-functional finish on denim fabric by single stage of processing. The denim fabrics were treated with synthesized nano-ZnO particle using direct exhaust and micro encapsulation method. The resultant fabrics were analyzed for their change in physical properties before and after finishing. The efficacy of the functional effects like UV resistant property, antibacterial and stain release ability was also analyzed. The result shows that, the treated material remains unaltered in most of the basic physical property except air permeability and stiffness. Further this treatment has also imparted excellent UV protection with the UPF R value of 30 (96-97.4% of Blocking) as per AS/NZS 4399. The antimicrobial activity of treated material shows excellent inhibition zone (26-40mm) against both gram positive and gram negative bacterial strain. The treated fabric gave a good performance in casees stain release as well. Source


Rammohan H.,PSG College of Technology | Ramachandran T.,Karpagam Institute of Technology
Journal of the Textile Association | Year: 2012

An attempt has been made to develop nonwoven materials made out of recycled fibres of cotton, viscose and polyester fabrics collected from garment industries. These nonwoven fabrics are made by adhesive bonding technique and their acoustic behaviours have been tested by impedance tube method (ASTM E 1050) for determining sound absorbing coefficient. The physical properties of these nonwoven materials such as areal density, thickness, bulk density, porosity and air permeability were compared and reported. The nonwoven made up of recycled polyester has better sound absorption coefficient. The mean Sound Absorption Coefficient (SAC) of cotton, viscose and polyester nonwovens lies in between 0.21 to 0.51 when tested under the frequencies of 500 Hz to 6400 Hz. These recycled nonwoven materials may be used as noise absorbents for automotive interiors and wall coverings in building interiors. It may be suggested that the currently used conventional materials like glass wool, rock wool, foam and various manufactured fibres that are hazardous and difficult to recycle can be replaced using these nonwovens. Source


Vijayalakshmi D.,PSG College of Technology | Ramachandran T.,Karpagam Institute of Technology
Journal of the Textile Association | Year: 2012

The main objective of this exploratory study is to make the fashion students, blooming designers and merchandisers to explore on the various techniques of fashion forecasting and its importance in fashion business. Fashion forecasting is the prediction of trends for forthcoming years that paves way for the new directions in fashion. It involves the prediction of colour, fabric, texture, design details, trimmings, etc. Consumers are the main focus of any business; they will decide the future of success or failure of any venture. Hence this forces the manufacturers to produce products that are preferred by the consumers. This paper disseminates the various fashion and trade publications, trade shows being organised nationally and internationally and also various media that gives the source of information about the future fashion trends. Source

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