PROXIMATE (NUTRIENT CONTENT) ANALYSIS OFÂ 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.
