Kalita D, Saikia C N
Regional Research Laboratory, Council of Scientific and Industrial Research, Jorhat 785-006, India.
Bioresour Technol. 2004 May;92(3):219-27. doi: 10.1016/j.biortech.2003.10.004.
The latex bearing plants Plumeria alba, Calotropis procera, Euphorbia nerrifolia, Nerium indicum and Mimusops elengi were evaluated as potential renewable sources of energy and chemicals. Plant parts (leaf, stem, bark) and also whole plants were analyzed for elemental composition, oil, polyphenol, hydrocarbons, crude protein, alpha-cellulose, lignin and ash. The dry biomass yields were between 4.47 and 13.74 kg/plant. The carbon contents in whole plants varied from 38.5% to 44.9%, while hydrogen and nitrogen contents varied from 5.86% to 6.72% and 1.26% to 2.34%, respectively. The bark of the plants contained the highest amount of hydrocarbons (1.78-3.93%) and the leaves contained the lowest amounts (0.26-1.82%). The unsaponifiable materials and fatty acids in the oil fractions of whole plants ranged from 22.8% to 56.4% and 24.7% to 58.7%, respectively. The highest gross heat value was exhibited by C. procera (6145 cal/g) and the lowest by N. indicum (4405 cal/g). Hydrocarbon fractions were characterized by IR and (1)H-NMR and by thermogravimetric analyses. The activation energy (E(a)) in the third stage of decomposition was the greatest in the hydrocarbon fraction obtained from M. elengi (16.40 kJ mol(-1)) and the lowest for C. procera (3.96 kJ mol(-1)). The study indicated that the plant species might be suitable as alternative source of hydrocarbons and other phytochemicals.
对含乳胶植物白鸡蛋花、牛角瓜、麻风树、夹竹桃和人心果进行了评估，以确定它们作为潜在可再生能源和化学品来源的可能性。对植物部分（叶、茎、树皮）以及整株植物进行了元素组成、油、多酚、碳氢化合物、粗蛋白、α-纤维素、木质素和灰分分析。干生物量产量为4.47至13.74千克/株。整株植物的碳含量在38.5%至44.9%之间，而氢和氮含量分别在5.86%至6.72%和1.26%至2.34%之间。植物的树皮中碳氢化合物含量最高（1.78 - 3.93%），而叶子中含量最低（0.26 - 1.82%）。整株植物油馏分中的不皂化物和脂肪酸含量分别在22.8%至56.4%和24.7%至58.7%之间。牛角瓜的 gross heat value最高（6145卡/克），夹竹桃最低（4405卡/克）。通过红外光谱、（1）H - NMR和热重分析对碳氢化合物馏分进行了表征。从人心果获得的碳氢化合物馏分在分解第三阶段的活化能（E(a)）最大（16.40千焦/摩尔），而牛角瓜的最小（3.96千焦/摩尔）。该研究表明，这些植物物种可能适合作为碳氢化合物和其他植物化学物质的替代来源。
