Herchi Wahid, Harrabi Saoussem, Rochut Sophie, Boukhchina Sadok, Kallel Habib, Pepe Claude
Département de Biologie, Faculté des sciences de Tunis, Laboratoire de Biochimie des lipides, 2092 ELmanar, Tunisia.
J Agric Food Chem. 2009 Jul 8;57(13):5832-6. doi: 10.1021/jf9004884.
Changes in hydrocarbon composition were investigated during maturation of three varieties of linseed (H52, O116, and P129) cultivated in Tunisia. The hydrocarbon fraction of the three linseed oil samples was found to contain mainly n-alkanes and squalene. The greatest decrease of these components occurred between 7 and 21 days after flowering (DAF); thereafter, the changes were slight. At 7 DAF, P129 had a significantly higher level of squalene (27.24 mg/100 g of oil) than H52 (3.36 mg/100 g of oil), but from this date until 21 DAF squalene decreased much more actively in P129, resulting in similar levels in H52 (0.57 mg/100 g of oil) and P129 (0.52 mg/100 g of oil) at full maturity. In three varieties of linseed, 13 n-alkanes were detected ranging from C(22) to C(34) carbon atoms. The n-alkane composition of linseed oil was influenced by the ripening stage of seeds. At 7 DAF, C29 was the most predominant hydrocarbon (19.84 mg/100 g of total oil), followed by C(27) (11.82 mg/100 g) and C(25) (11.28 mg/100 g). C(29) exhibited the most significant decrease from 7 to 21 DAF, as a result C(27) being the most significant n-alkane component for the remainder of the period. At full maturity, the content of total n-alkanes in three varieties of linseed ranged from 4.0 to 4.26 mg/100 g of oil.
对在突尼斯种植的三个亚麻籽品种（H52、O116和P129）成熟过程中的烃类成分变化进行了研究。发现三个亚麻籽油样品的烃类部分主要含有正构烷烃和角鲨烯。这些成分在开花后7至21天之间下降幅度最大；此后，变化很小。在开花后7天，P129的角鲨烯含量（27.24毫克/100克油）明显高于H52（3.36毫克/100克油），但从这一时期到开花后21天，P129中的角鲨烯下降更为明显，导致在完全成熟时H52（0.57毫克/100克油）和P129（0.52毫克/100克油）中的角鲨烯含量相似。在三个亚麻籽品种中，检测到13种正构烷烃，碳原子数从C(22)到C(34)不等。亚麻籽油的正构烷烃组成受种子成熟阶段的影响。在开花后7天，C29是最主要的烃类（19.84毫克/100克总油），其次是C(27)（11.82毫克/100克）和C(25)（11.28毫克/100克）。C(29)在开花后7至21天下降最为显著，因此在该时期剩余时间里C(27)是最主要的正构烷烃成分。在完全成熟时，三个亚麻籽品种中正构烷烃的总含量在4.0至4.26毫克/100克油之间。
