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Nutritional studies on rats and fish (carp Cyprinus carpio) fed diets containing unheated and heated Jatropha curcas meal of a non-toxic provenance.
MedLine Citation:
PMID:  10517277     Owner:  NLM     Status:  MEDLINE    
Unheated and heated (121 degrees C, 66% moisture; 15, 30 and 45 min) Jatropha meals of non-toxic provenance from Veracruz state in Mexico were evaluated using rats and fish. With rats, the weight gain was highest for the casein diet followed by heated (30 min; only this treatment was studied using rats) and unheated Jatropha meal containing diets. The protein efficiency ratio (PER) for unheated and heated Jatropha meal containing diets was 37 and 86%, respectively, of the casein diet. On the other hand, the body weight gain, PER and feed conversion ratio of fish were statistically similar for unheated and heated (15, 30 and 45 min) Jatropha meal containing diets fed for a period of 35 days. Although these parameters were statistically similar for the unheated and heated Jatropha meal containing diets, the body weight gain, PER and protein productive value were highest and the feed conversion ratio lowest with 15 min heated Jatropha meal, suggesting that the heat treatment for 15 min is optimal for the meal. Trypsin inhibitor and lectin activities decreased drastically (>83 and 99%, respectively) after 30 and 45 min of heat treatment and after 15 min, the residual lectin activity was negligible and the residual trypsin inhibitor activity was 34%. These results, together with the nutritional parameters investigated, imply that Jatropha trypsin inhibitors and lectins do not have any adverse effects on carp at least up to 35 days of feeding. The nutritional value of Jatropha meal of the non-toxic provenance is high, and potential exists for its incorporation into the diets of monogastrics, fish and possibly humans.
H P Makkar; K Becker
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Plant foods for human nutrition (Dordrecht, Netherlands)     Volume:  53     ISSN:  0921-9668     ISO Abbreviation:  Plant Foods Hum Nutr     Publication Date:  1999  
Date Detail:
Created Date:  1999-10-29     Completed Date:  1999-10-29     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8803554     Medline TA:  Plant Foods Hum Nutr     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  183-92     Citation Subset:  IM    
Institute for Animal Production in the Tropics and Subtropics, University of Hohenheim, Stuttgart, Germany.
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MeSH Terms
Animal Nutritional Physiological Phenomena*
Caseins / administration & dosage
Hot Temperature*
Lectins / analysis
Plant Lectins
Plant Proteins / administration & dosage*
Rats, Sprague-Dawley
Seeds* / chemistry
Trypsin Inhibitors / analysis
Weight Gain
Reg. No./Substance:
0/Caseins; 0/Lectins; 0/Plant Lectins; 0/Plant Proteins; 0/Trypsin Inhibitors

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