Preserving Freshness: Hot Water Treatment as an Alternative to Prevent Cold Damage in Stored Areca Nuts

Abstract

To extract fat from plant materials, conventional solvent
extraction and several emerging technologies, such as
ultrasound, microwave, pulsed electric field, and high
voltage electrical discharge either as a pretreatment method
or assisted extraction are applied (Galanakis 2013). From
the previous work, conventional solvent extraction wasused
to extract fat [approximately 33–37% (w/w)] from the
rambutan (Nephelium lappaceum) seed kernel. The solvent-extracted fat is a white, soft solid at room temperature
and contains oleic acid (C18:1; 36.8%) and arachidic acid
(C20:0; 34.3%) as the main fatty acids (Sirisompong et al.
2011). The in vivo oral and skin irritation testing of
rambutan fat has indicated that it is a non-toxic fat (Eiamwat et al. 2014). From our previous study (Mahisanunt
2016), the solvent fractionation of rambutan kernel fat
successfully conducted and obtained the fractionated fats
that had specific physical and chemical properties. Fractionation is a technique for changing the physical properties of fat by controlling the crystallizatio