THE UTILITY POTENTIALS OF SOME DIOSCOREA SPECIES WITH PARTICULAR REFERENCE TO D. ROTORIDATA AND D. DUMATORUM
By
OBIEJE, O. C. STANLEY FST/N2003/005
Presented To
Department of Food Science And Technology
ABSTRACT
Yams are any of the economically useful plants belonging to the genues Diocorea; yams are also the tubers or rhizomes of these plants (Coursey 1967).
The yam tuber is economically the most important part of the plant. The structures of the tuber is variable, depending on the species, most yam tubers are cylindrical in shape; weight of individual tubers ranges from 200g â“ 50kg (Asiedu 1992).
Dioscorea are grown extensively only in three parts of the world; West Africa, carriban Islands and Southeast Asia. The world production of yam was estimated at 28.1 million tones in 1993, out of these production, 96% came from West Africa. The major yam producers is Nigeria with 78% of world production (Asiedu 1992) other country of significant important in the production of yam outside West Africa are: west Indies, Brazil, Venezuela, Papua, New Guinea, China and Philippines.
TABLE OF CONTENTS
FRONT PAGE
DEDICATION
ACKNOWLEDGEMENT
TABLE OF CONTENTS
CHAPTER ONE;
INTRODUCTION
1.1 INTRODUCTION
1.2 SPACIES
1.3 COMPOSITION
1.4 USE OF YAM IN WEST AFRICA
1.5 ANTI NUTRIENTS AND OTHER FACTORS
CHAPTER TWO:
UTILIZATION & PROCESSING OF YAM (REFERENCE TO DROTONDATA AND D. DUMETORUM
2.1 BOILED YAM
2.2 FRIED, ROASTED AND BAKED YAM
2.3 FRIED YAM BALLS
2.4 POUNDED YAM
2.5.1 YAM FLOOR
2.5.2 INDUSTRIAL INSTANT YAM FLOOR
2.5.3 YAM FLOOR IN COMPOSITOR FLOOR FOR BAKERY
2.6 INSTANT YAM FLAKE
2.6.1 PROCESSING FLAKE FOR FUFU
2.6.2 PROCESSING FLAKE FOR NON STICKY PRODUCT
2.7 UTILIZATION OF YAM AS ANIMAL FEED
2.8 PROBLEMS ASSOCIATED WITH UTILITY OF YAM AS FOOD
2.9 NON FOOD USES OF YAM
CHAPTER THREE
CONCLUSION
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