主题：【已应助】求助英文文献5篇，请帮帮忙，谢谢啦！

【篇  号】：1
【题  名】： Plant pectin substances. Methods of isolating pectin substances 
【作  者】： M. T. Turakhozhaev and M. A. Khodzhaev
【期刊名全称】：Chemistry of Natural Compounds 
【文献页码】：Volume 29, Number 5, 558-565, DOI: 10.1007/BF00630196 
【全文链接】: http://www.springerlink.com/content/wv2152u066n72672/

【篇  号】：2
【题  名】：Pectin Extraction from Lemon By-Product with Acidified Date Juice: Effect of Extraction Conditions on Chemical Composition of Pectins   
【作  者】： Manel Masmoudi, Souhail Besbes, Fatma Abbes, Christelle Robert, Michel Paquot, Christophe Blecker and Hamadi Attia
【期刊名全称】：Food and Bioprocess Technology 
【文献页码】： DOI: 10.1007/s11947-010-0344-2
【全文链接】: http://www.springerlink.com/content/f588r82788l6858h/

【篇  号】：3
【题  名】：Citrus products— A quarter century of amazing progress 
【作  者】：Glenn H. Joseph
【期刊名全称】：Economic Botany 
【文献页码】：Volume 1, Number 4, 415-426, DOI: 10.1007/BF02858905 
【全文链接】: http://www.springerlink.com/content/p41412w647g44858/

【篇  号】：4
【题  名】：Effect of different extraction and precipitation methods on yield and quality of pectin 
【作  者】：Maurizia Seggiani1,*, Monica Puccini1, Maurizio Pierini1, Samuele Giovando2, Cristian Forneris2
【期刊名全称】：International Journal of Food Science & Technology 
【文献页码】： Volume 44, Issue 3, pages 574–580, March 2009
【全文链接】: http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2621.2008.01849.x/full

【篇  号】：5
【题  名】：Extraction of pectin from Egyptian orange peel. Factors affecting the extraction   
【作  者】：Sohair A. El-Nawawi and Fadia R. Shehata*
【期刊名全称】：Biological Wastes
【文献页码】：Volume 20, Issue 4, 1987, Pages 281-290   
【全文链接】: http://www.sciencedirect.com/science/article/pii/026974838790005X