Tuesday, December 20, 2011





棕榈油是从油棕树上的棕果(Elaeis Guineensis)中榨取出来的,果肉压榨出的油称为棕榈油( Palm Oil),而果仁压榨出的油称为棕榈仁油(Palm Kernel Oil),两种油的成分大不相同。棕榈油主要含有棕榈酸(C 16)和油酸(C 18)两种最普通的脂肪酸,棕榈油的饱和程度约为50%;棕榈仁油主要含有月桂酸(C 12),饱和程度达80%以上。传统上所说的棕榈油仅指棕榈果肉压榨出的毛油(Crude Palm Oil, CPO)和精炼油(Refined Palm Oil, RPO),不包含棕榈仁油。它被人们当成天然食品来使用已超过五千年的历史。



Palm oil, coconut oil and palm kernel oil are edible plant oils derived from the fruits of palm trees. Palm oil is extracted from the pulp of the fruit of the oil palm Elaeis guineensis; palm kernel oil is derived from the kernel (seed) of the oil palm and coconut oil is derived from the kernel of the coconut (Cocos nucifera). Palm oil is naturally reddish in color because it contains a high amount of beta-carotene.
Palm oil, palm kernel oil and coconut oil are three of the few highly saturated vegetable fats. Palm oil is semi-solid at room temperatures. Palm oil contains several saturated and unsaturated fats in the forms of glyceryl laurate (0.1%, saturated), myristate (1%, saturated), palmitate (44%, saturated), stearate (5%, saturated), oleate (39%, monounsaturated), linoleate (10%, polyunsaturated), and alpha-linolenate (0.3%, polyunsaturated). Palm kernel oil and coconut oil are more highly saturated than palm oil. Like all vegetable oils, palm oil does not contain cholesterol (found in unrefined animal fats),] although saturated fat intake increases both LDL and HDL cholesterol.
Palm oil is a common cooking ingredient in the tropical belt of Africa, Southeast Asia and parts of Brazil. Its increasing use in the commercial food industry in other parts of the world is buoyed by its lower cost and the high oxidative stability (saturation) of the refined product when used for frying.
The use of palm oil in food products is often the focus of environmental activist groups, due to it being documented as a cause of substantial and often irreversible damage to the natural environment.




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