PROXIMATE (NUTRIENT CONTENT) ANALYSIS OF DIOSCOREA BULBIFERA
TABLE OF CONTENTS
CHAPTER ONE
Introduction 1
1.1 Scope 3
1.2 Statement of problem 4
1.3 Objectives 4
1.4 Hypothesis 5
1.5 Limitations 5
CHAPTER TWO
Literature Review 7
2.1 Classification of adhesives 7
2.2 Molecular structure of starch 27
2.3 Forms of processed starch 29
CHAPTER THREE
Materials and method 32
3.1 Materials 32
3.1.2 Method 32
3.1.3 Extraction of starch from cassava 32
3.1.4 Production of adhesive from cassava 33
3.2 Test analysis 34
3.2.1 PH determination 34
3.2.2 Determination of tack time 35
3.2.3 Solid / moisture content determination 35
3.2.4 Wettablilty determination 36
3.2.5 Storage life determination 36
CHAPTER FOUR
Results 37
4.1.0 PH values 37
4.1.1 Tack time determination 38
4.1.2 Solid and moisture contents 38
4.1.3 Wettability 38
4.1.4 Storage life 39
CHAPTER FIVE
5.0 Discussion, conclusion and recommendations 40
5.1 Discussion 40
5.2 Conclusion 42
5.3 Recommendation 43
Reference
ABSTRACT
This study is part of the effort to find out and document the nutrient compositions of the Dioscorea bulbifera (Aerial yam on air potato). Dioscorea bulbifera is among the many species of yam that can be found on Nigeria. The tissue is known to be a good source of food nutrients such as carbohydrate, crude protein, crude fat, fibre, Ash and moisture. As in many other yam species, moisture (64%) constitutes the greatest composition in percentage, followed by carbohydrate (29.03%), crude protein (1.1%), Ash (1.5%), crude fibre (0.67%) and crude fat (0.4%), with crude fat being the lowest in quantity. Dioscorea bulbifera is also known to contain some mineral elements such as potassium, calcium, phosphorous, magnesium, iron, zinc, copper, and sodium. Among the mineral elements potassium is found to be the highest while magnesium the lowest.