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Articles by T. Karthikeyan
Total Records ( 2 ) for T. Karthikeyan
  S. Bhama , T. Karthikeyan , T. Ramesh and S. Gopinathan
  The aim of the research work is to formulate a nutritional juice to fulfil the nutritional requirements of human being through cost effective manner. Thus, the developmental strategy is to produce a nutritional health drink with natural preservatives as an alternative to chemically prepared modern soft drinks to avoid health risks and increase the bioavailability of fruits and vegetables derived nutritional fractionates. Selected fruits, vegetables and some spices including indigenous species of Indian origin were utilized in a proper proportion in order to attain the human nutritional requirements. The methodology includes the extraction of nutritional juice from fruits and vegetables and subsequent analysis of nutritive value. Hence, the nutritional content, percentage of antioxidants and antimicrobial activity were also assessed in order to fulfil the nutritional requirements and longevity of the juice without any chemical additives. Upon fulfilling the criteria of nutritional requirements, the palatability was tested with many volunteers to know their willingness of consumption and found that all had accepted it. In the modern world, many people are consuming juices, foods with chemical based production or preservation without knowing the actual deteriorative and negative side effects. But the consumption of natural nutritional juice kind of products, which are produced directly from natural resources, would certainly improve the health status of individual without any negative side effects. The result of this research study reveals the presence of large amount of antioxidants, which is significantly high (94.7%) and other nutritive factors such as vitamins, minerals, also proves the same.
  T. Karthikeyan , B.G. Jeyaprakash and John Bosco Balaguru Rayappan
  Today, there is an increasing demand for sensors that includes home-security, military, industrial and clinical diagnosis. In the past, Fiber Optic based Sensor (FOS) has made profound impact due to its simple, room temperature detection and large range of detection species. In the present work, a simple optical fiber for sensing ethanol vapour was developed using borosilicate glass rod as core and Successive Ionic Layer Adsorption and Reaction (SILAR) deposited zinc oxide (ZnO) thin film as cladding materials. Structural studies carried out using X-ray Diffraction (XRD) method indicates, the ZnO film was polycrystalline hexagonal structure in nature with preferential orientation along (002) plane. Grain size obtained through line broadening technique was found to be 25 nm. The two ends of the fabricated fiber were connected to a diode laser source of 850 nm and optical power meter of 0.01 dBm accuracy as detector. The transmitted light intensity of the fabricated fiber found to changes in ethanol vapour atmosphere. The response and recovery time towards ethanol at room temperature as a function of cladding thickness and length were analysed and reported.
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