Vol. 1 (6) : November-December 2010 issue
Green Farming Vol. 1 (6) : 662-663 (November-December, 2010) (New Series)
Studies on viscosity of guava jam at different temperature and shear rate
ROOPA BAI R.S.a1, P.S. PISALKARb2*, S.K. JAINc3 and R.P. MURUMKARd4
aDeptt. of Agricultural Processing & Food Engineering, University of Agriculture Sciences Raichur - 584 102 (K.K.),
bAgro Product Development Research Centre, Dr. P.D. Krishi Vidyapeeth, Akola - 444 104 (M.S.) cDeptt. of Processing and Food Engineering, M.P. University of Agriculture & Techology, Udaipur - 313 001 (Raj.) dKrishi Vigyan Kendra, Sakoli, Bhandara - 441 802 (M.S.)
Designation : 1Res. Assoc., 2S.R.F., 3Asstt. Professor, 4SMS
Subject : Food Science, Preservation & Processing, Protectants & Infestation and Post-harvest Technology
Paper No. : Green Farming Vol. 1 (6) : 662-663 (November-December, 2010) (New Series)
Total Pages : 2
Received :
Revised accepted :
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Citation :
ROOPA BAI R.S., P.S. PISALKAR, S.K. JAIN and R.P. MURUMKAR. 2010. Studies on viscosity of guava jam at different temperature and shear rate. Green Farming Vol. 1 (6) : 662-663 ; November-December, 2010 (New Series)
ABSTRACT
Guava jam is an intermediate moisture food containing fruit pulp, pectin, sugar and acid. The viscosity of guava jam was studied using a Rapid Visco Analyser at different shear rate (5, 10 and 15rps) and temperature (30, 40 and 50oC) at a particular pulp sugar ratio (1:1) and pectin concentration (1 per cent). The viscosity of the guava jam was studied at all temperatures and shear rates for 5min. The viscosity of guava jam decreased as the time increased for all temperature and shear rates indicating thixotropic behaviour. The viscosity of the guava jam at a particular time of shearing depended on the shear rate and temperature. At a particular temperature with the increase in shear rate the viscosity of guava jam decreased. Similiarly at a particular shear rate, with the increase in temperature the viscosity of guava jam decreased.
Key words :
Guava jam, Pectin, Psidium guajava, Shear rate, Thixotropic, Viscosity.
