I would like to express my sincere thanks to my thesis advisor, Dr. Karthikeyan Venkatachalam for her invaluable help and constant encouragement throughout the course of this research, as well as our principal who gave me the golden opportunity to do this wonderful project on the topic Effect of calcium infusion on the osmotic dehydration of purple sweet potato and quality, which also helped me in doing a lot of Research and me came to know about so many new things am really thankful to them. I am most grateful for her teaching and advice, not only the research methodologies but also many other methodologies in life. I would not have achieved this far and this thesis would not have been completed without all the support that I have always received from her.