Production And Acceptability Studies Of Malted Sorghum (Sorghum Bicolor) Biscuit

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ABSTRACT

Biscuit was produced from malted sorghum (Sorghum bicolor) and wheat flour blend. Sorghum grains were sorted, steeped in water, germinated and kilned. Four samples of biscuit were produced using sorghum and wheat in the following ratios samples

A; 30: 70, sample B; 50:50, sample C; 60:40, sample D; 100:0. Creaming method was used in biscuit production with specified ingredients.

Proximate analysis of the product (biscuit) was determinate viz. moisture content for sample A; 2.5%, B; 3% C; 3.5%, D; 2%, fat content for the sample A; 15%, B; 16%, C; 17%, D, 15.5%, Protein content for A; 8.52%, B; 8.7%, C; 8.79%, D; 8.35%, Ash content for sample A; 0.5%, B; 1.0%, C; 1.5%, D; 0.5% and Carbohydrate content for A; 73.48%, B; 71.24%, C; 69.21%, D; 73.65% respectively.

the sensory evaluation of the samples were carried out using hedonic scale. from the result, there was no significant difference at 5% level and 1% level between the four samples in terms of colour crispiness, flavour, and overall acceptance, but when compared with 100% wheat, there was a slight difference in texture of biscuits with “sorghum and wheat”, but from the score mean, sample B gave the best result.

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TABLE OF CONTENTS

CHAPTER ONE
1.0 Introduction
1.1 Objectives of the study

CHAPTER TWO
2.0 Literature Review
2.1 Origin of Sorghum
2.2 Sorghum Utilization
2.2.1 Production of Malted Sorghum Flour
2.2.2 Malted of Sorghum
2.2.3 Steeping
2.2.4 Germination
2.2.5 Kilning
2.3 Method of Processing Wheat into Flour for Biscuit Making
2.3.1 Wheat Flour Production
2.3.2 Effects of Processing of Nutritional Value of wheat Flour
2.3.3 Functional Processing of Nutritional Value of Wheat Flour
2.4.0 Ginger
2.4.1 The History of Ginger
2.4.2 Ginger Cultivation
2.4.3 Spices and Other Oils
2.4.4 Ginger Processing
2.4.5 Uses of Ginger
2.4.6 Nutritional Composition
2.5.0 Biscuit
2.5.1 Definition of Biscuit
2.5.2 Classification of Biscuits
2.5.3 Hard Dough Biscuits
2.5.4 Lean Hard Dough Biscuits
2.5.5 Medium Hard Dough Biscuits
2.5.6 Puff Hard Biscuits
2.5.7 Lean Batter Biscuits
2.5.8 Highly Enriched Biscuits
2.5.9 Proximate Composition of Biscuits

CHAPTER THREE
3.0 Materials and Method
3.1 Sources of Raw Materials
3.2 Raw Materials for Baking
3.3 Equipment
3.4 Chemicals
3.5 Method for Processing Malted Sorghum
3.6 Biscuit Production
3.6.1 Proximate Analysis of the Prepared Biscuits
3.6.2 Protein Determination
3.6.3 Fat Determination
3.6.4 Moisture Determination
3.6.5 Total Ash Determination
3.6.6 Carbohydrate Determination
3.6.7 Sensory Evaluation of Prepared Samples

CHAPTER FOUR
4.0 Results and Discussions
4.1 Proximate Composition of the Test Biscuits
4.2 Sensory Evaluation
4.3 Discussion

CHAPTER FIVE
Conclusion and Recommendation
References
Appendix

CHAPTER ONE

INTRODUCTION
Biscuit may be defined as a thin flat baked product made from flour, salt, sweetening agent fat and preservatives. They are crisps, unleavened and sometimes sweet pastry produced light by the addition – F baking powder or soda, sometimes with chocolate or fruit in put (Achukoh; 1992). Biscuit can also be defined as a baked product having not less than 8% of flour content calculated (Hannemah, 1981). Okaka, 1997 stated that biscuits are termed “cookies” in USA but the Word biscuit means a small cake like bun.
According to Terrell, 1981 there are basically some ingredients that are used for biscuit production such as sugar, salt, milk, shortening flavour leavening. Egg improves the volume of biscuit as well as the taste and flavour. Egg and butter are also used for variety, these improves the quality of the products.

Wheat flour is a critical and principal raw material in biscuit production its. Superiority over other cereals is due to the presence of gluten which inherently imparts all the essential qualities to their products. The absence of this simple protein in non-wheat flour makes them unsuitable as substitutes for wheat flour. Unfortunately, wheat is a temperature crop, there fore, our tropical climate does not favour its cultivation. Flour which has high gluten content are classified as a strong hard flour, and therefore produces a strong dough and thus a strong biscuit is produced (Richtea), while flour with small gluten content produces a soft I weak biscuit (Digestive) Aerating chemicals, syrups and water were further added as one of the basis ingredients for biscuit making (Achukoh; 1992).

The production of biscuits involves weighing, mixing, dough formation, kneading and rolling out, machining and shaping, prickling Bakino, cooling and packaging (Okaka, 1997).
The malting potentials of sorghum grains can be utilized to produce soft dough biscuit. Germinated sorghum grains, develop alpha – amylase, carboxy peptidase, endo – beta – 1, 3 – glucanase, pentosanase, limit dextrinase and endo – protease in the grain during malting. Malting involves essentially steeping, germination and limiting cereals, seedling growth by kilning. During germination enzymes are produced for the degradation of starch and protein in the cereal grain. Malting yields higher proportions of hydrolytic enzymes such as X and B – amylases which may be either completely soluble or largely insoluble depending on the variety.

Malted sorghum and wheat flour are used in order to check the baking potential of biscuit, malts produce from sweet sorghum and related variety usually contain insoluble amylase. The insoluble substances that make aqueous extraction impossible (Amori, 1 9 8 7) – Glucosidase in sorghum malt is also highly insoluble malt solid (Barry, and Dorota 1988).
Malting causes a decrease in the density of caryposis in sorghum grain (Isola, 1992). Lower the amount of lysine from 0.25% in unmalted sorghum to 0.18% in sorghum malt (Ilori, 1989) and reduces the milling energy (Swanstoo et al, 1994).
Time and temperature of storage influence the percentage soluble amylase in sorghum grain. For example, sorghum grain stored at 12t 23oc temperature for 2 to 3 years give higher levels of soluble amylase (between 57 – 73%) while nearly harvested grain give…

Production And Acceptability Studies Of Malted Sorghum (Sorghum Bicolor) Biscuit

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