Isolation And Performance Evaluation Of Saccharomyces Cerevisiae From On Palm Wine (Elaels Guinneensis) At Different Temperature Of Proofing During Bread Making

Project and Seminar Material for Food Science and Technology (FST)

Isolation And Performance Evaluation Of Saccharomyces Cerevisiae From On Palm Wine (Elaels Guinneensis) At Different Temperature Of Proofing During Bread Making


Abstract


Saccharomyces cerevisiae was isolated from the fermenting sap of flaeis guinneensis. The yeast isolate was used in dough proofing at different temperatures. The samples B, C, D, E, and F, (containing the same ingredients) were leavened at 200 c, 250 c, 300 c and 40 c respectively. Similarly, sample A which served as the contol was leavened at 30c. the following proof heights were recorded 3.3cm, 1.9 cm, 23cm, 3.5cm, 3.6cm and 2.5cm respectively for the proofing period, samples D and E compared favourably with the control which has a proof height of 3.3cm.

The bread height, weight , volume and the specific volume was recorded sensory evaluation was carried on the samples for taste, appearance, texture flavour and overall acceptability. Turkeys test was in the samples. Result of the sensory evaluation showed that samples D ranked favourably with the control in all quality attributes tested at (D < 0.05). The other samples were different from the control in all the sensory attributed tested for A proofing temperature of 300c using the isolate was recommended for bread making in other to achieve the desired bread quality.


Table Of Content


  • Title page
  • List of tables and figures
  • Table of contents
  • Abstract

Chapter One

  • 1.0 Introduction
  • 1.01 Palm wine
  • 1.02 Composition of palm wine
  • 1.03 Yeast
  • 1.04 Bread
  • 1.41 Aims and objective

Chapter Two

  • Literature Review
  • 2.1 Bread Production
  • 2.2 Functions of the Ingredients In Bread Production
  • 2.3 Type of bread
  • 2.4 The procedures involved in bread production
  • 2.5 Bread quality
  • 2.6 Palm wine (elaeis quinn eensis)
  • 2.7 General characteristics of Saccharomyces cerevisiae
  • 2.8 Characteristics of bakers yeast
  • 2.9 Pure culture isolation and cultivation

Chapter Three

  • Materials and methods
  • 3.1 Equipments
  • 3.2 Raw materials
  • 3.3 Sources of material
  • 34 Preparation of medium
  • 3.5 Isolation of yeast species
  • 3.6 Characterization and test for viability of yeast
  • 3.7 Production of starter culture
  • 3.8 Preparation of yeast paste
  • 3.9 Bread production
  • 3.10 Quality test

Chapter Four

  • Results and discussion
  • 4.1 Characteristics of yeast on malt extract nutrient medium
  • 4.2 Identification of yeast isolate
  • 4.3 Dough leavening ability
  • 4. 4 The volume, weight, height and specific volume of the samples
  • 4.5 Sensory evaluation

Chapter Five

  • Conclusion and Recommendation
  • 5.1 Conclusion
  • 5.2 Recommendations
  • Reference
  • Appendix 1
  • List Of Tables And Figures

List Of Tables


  • Table 1 Recipe For Bread Production
  • Table 2 Characteristics Of The Yeast Isolates
  • Table 3 Proof Height Of The Samples
  • Table 4 The Volume, Weight, Height And Specific Volume Of The Samples
  • Table 5 Sensory Evaluation Results

List Of Figures


  • Fig1 Shapes Of The Yeast
  • Fig 2 Flow Chart Of Bread Production

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