Moisture Dependent Physical and Thermal Properties of Coleus Tuber

V. Chandrasekar; R. Kailappan; R. Kasthuri; K. Rajamani

doi:10.52151/jae2013501.1500

Authors

V. Chandrasekar Assistant Professor (Senior Grade) Department of Food Technology, Kongu Engineering College, Perineuria, Erode, India Author
R. Kailappan Professor, Department of Food and Agricultural Process Engineering, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural university, Coimbatore, India Author
R. Kasthuri Professor, Department of Food and Agricultural Process Engineering, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural university, Coimbatore, India Author
K. Rajamani Professor, Department of Spices and Plantation Crops, Horticultural College and Research Institute, Tamil Nadu Agricultural university, Coimbatore, India. Author

DOI:

https://doi.org/10.52151/jae2013501.1500

Keywords:

Coleus tuber, physical properties, thermal properties, moisture content

Abstract

Some important physical and thermal properties of coleus tubers were determined in the moisture range of 466.62 to 21.52% (d.b). Selected physical properties namely weight, size; bulk density, particle density and porosity increased with increase in moisture content. Thermal properties viz. specific heat and thermal conductivity increased with increase in moisture content while thermal diffusivity recorded a decreasing trend.

References

Aviara N A; Gwandzang M I; Hque M A. 1999. Physical Properties of Guna Seeds. J. Agric. Eng. Res., 73(2), 105-111.

Bart-Plange A; Baryeh E A. 2003. The Physical properties of category B cocoa beans. J. Food Eng., 60, 219-227.

Baryeh A E; Mangope B K. 2003. Some physical properties of Qp – 38 variety of pigeon pea. J. Food Eng.,56(1), 59-65.

Carman K. 1996. Some physical properties of lentil seeds. J. Agric. Eng. Res., 63, 87-92.

Chandrasekar V; Viswanathan R. 1999. Physical and thermal properties of coffee. J. Agric. Eng. Res., 73,227-234.

Deshpande S D; Bal S; Ojha T P. 1993. Physical properties of soybean. J. Agric. Eng. Res., 56, 89-98.

Dutta S K; Nema V K; Bhardwaj R K. 1988. Physical properties of gram. J. Agric. Eng. Res., 39, 259-268.

Hsu M H; Mannapperuma J D; Singh R P. 1991. Physical and thermal properties of pistachios. J. Agric. Eng. Res.,

, 311-321.

Jha, S N. 1999. Physical and hygroscopic properties of makhana. J. Agric. Eng. Res., 72(2), 145-150.

Jha S N; Prasad S. 1993. Physical and thermal properties of gorgon nut. J. Food Process Eng., 16 (3), 237-245.

Joshi D C; Dass S K; Mukherjee R K. 1993. Physical properties of pumpkin seeds. J. Agric. Eng. Res., 54, 219- 229.

Kaleemullah S. 1992. The effect of moisture content on the physical properties of groundnut kernels. Tropical Sci., 32, 129-136.

Kaleemullah S. 2002. Studies on engineering properties and drying kinetic of chillies. Unpublished Ph.D Thesis, Tamil Nadu Agricultural University, Coimbatore, India.

Mohsenin N N. 1980. Physical properties of plant and animal Materials. Gordon and Breach Science Publishers,New York.

Ogunjimi L A O; Aviara N A; Aregbesola O A. 2002. Some engineering properties of locust bean seed. J. Food Eng., 55(2), 95-99.

Opoku A; Tabil L G; Shaw M D. 2006. Thermal conductivity and thermal diffusivity of timothy hay. Canadian Biosystems Eng., 48, 3.1 to 3.7.

Rajamani K; Vadivel E. 2009. Marunthu Kurkan–Medicinal Coleus. In: Naveena Mulikai Sagupaddi Thozhil Nuttpangal, Tamil Nadu Agricultural University, Coimbatore, pp: 17-22.

Razavi M A; Emadzadeh B; Rafe A; Mohammed A A. 2007. The physical properties of pistachio nut and its kernel as a function of moisture content and variety, part 1 Geometric properties. J. Food Eng., 81(1), 209-217.

Shepherd H; Bhardwaj R K. 1986. Moisture dependent physical properties of pigeon pea. J. Agric. Eng. Res., 35, 227-234.

Sreenarayanan V V; Chattopaday P K. 1986. Thermal conductivity and diffusivity of rice bran. J. Agric. Eng. Res., 34, 115-121.

Sreenarayanan V V; Viswanathan R; Subramanaiyan V. 1988. Physical and thermal properties of soybean. J. Agric. Eng. Res., 25 (4), 76-82.

Suthar S H; Das S K. 1996. Some Physical properties of karingda (Citrullus lamatis (Thump Manif)] seeds. J. Agric. Eng. Res., 65, 15-22.

Verma R C; Suresh Prasad. 2000. Mechanical and thermal properties of maize. J. Food Sci. Technol., 37 (5), 500-505.

Yang W; Sokhansanj S; Tang J; Winter P. 2002. Determination of thermal conductivity, specific heat and thermal diffusivity of Borage seeds. Biosystems Eng., 82(2), 169-176.