id	keyword
alkej-1014	oil
alkej-1014	biodiesel
alkej-1014	castor
alkej-1014	vol
alkej-1014	production
alkej-1014	castor oil
alkej-1014	point
alkej-1014	doi
alkej-1014	engineering
alkej-1014	acid
alkej-1014	journal
alkej-1014	water