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5707072 
Journal Article 
Development of slow release styrene/butadiene rubber formulations containing Phytolacca dioica L as source of molluscicidal saponin 
Helaly, FM; Soliman, HSM; Galal, A; Ahmed, AA 
1997 
1 
Plastics, Rubber & Composites Processing and Applications
ISSN: 0959-8111
EISSN: 1876-4681 
26 
1 
32-37 
English 
Styrene/butadiene rubber has been used as binding matrix for the finely powdered dry leaves of Phytolacca dioica L plant. Saponin is the effective constituent in the berries and leaves of the plant that kills the snails of Biomphalaria alexandrina, the intermediate host of Schistosomiasis. The effective saponin was 4.1% in leaves and 5.9% in the berries of the plant. The release rate of saponin in water depended on the concentration of the plant leaves in the matrix. Hence the release rate of saponin followed the order: 200>150>100>>50 phr. The release kinetics of saponin were zero order. The physicomechanical properties of styrene/butadiene rubber were enhanced by increasing the concentration of the plant leaves to 50 phr, then a gradual deleterious effect was observed by increasing the concentration up to 200 phr. 
Blending; Composition effects; Molluscicidal activity; Phytolacca dioica; Plants (botany); Reaction kinetics; Release kinetics; Saponin; Styrene/butadiene rubber; Biotechnology and Bioengineering Abstracts; Bioengineering Abstracts; Mechanical properties; W 30965:Miscellaneous, Reviews; W4 802.3:CHEMICAL OPERATIONS; W4 818.2.1:SYNTHETIC RUBBER; W4 804.2:INORGANIC COMPOUNDS; W4 801:CHEMISTRY; W4 461.9:BIOLOGY; W4 802.2:CHEMICAL REACTIONS