THE EFFECTS OF ESTERIFICATION ON COLD WATER SOLUBILITY OF CASSAVA STARCH

  • Type: Project
  • Department: Bio-Chemistry
  • Project ID: BCH0257
  • Access Fee: ₦5,000 ($14)
  • Pages: 51 Pages
  • Format: Microsoft Word
  • Views: 499
  • Report This work

For more Info, call us on
+234 8130 686 500
or
+234 8093 423 853
ABSTRACT
The aim of this study is to improve the Cold Water Solubility (CWS) and esterification activity of Native cassava Starch (NS) by pretreatment using NaOH (Sodium hydroxide) aqueous solution. The influence of pretreatment on granule shape and crystal structure of cassava starch was investigated by Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD). It has been found that the average particle size of Pretreatment cassava Starch (PS) decreased to nanometer level, smaller than those of NS (6-18 μm). XRD revealed that crystalline pattern of pretreated cassava starch was VH-type, which was different from that of Native cassava Starch (A-type). The maximum CWS of PS was 95.56%, while the NS was only 0.8%. NS and PS were esterified with oleic acid catalyzed by lipase under the same conditions respectively. The effects ofthe pretreatment on esterification activity of the cold water cassava starches were investigated by analyzing the Degrees of Substitutions (DS) of the esterification products. The maximum DS of pretreatment cassava starch oleate was 0.227, while the DS of native starch oleate was very low and even could not be detected.
Keywords: Cold water solubility, esterification activity, lipase, NaOH aqueous solution, pretreatment cassava starch.

TABLE OF CONTENTS
I.ABSTRACT
II.INTRODUCTION
III.MODIFICATION OF STARCHES
IV.EFFECT OF MODIFICATION ON DIFFERENT PROPERTIES OF CASSAVA STARCH
V.MATERIALS AND METHOD
VI.RESULTS AND DISCUSSION
VII.CONCLUSION
VIII.REFERENCE

INTRODUCTION
Starch is one of the most abundant materials produced by nature which has already been found numerous industrial applications. It is one of the cheapest biopolymer and could be totally biodegraded, this leading to the growing interest in the nonfood usage of starch. Starch has been the choice materials forapplication in synthetic polymers. But the nature deficiencies of starch (such as un-solubility in cold water, easy to aging, retrogradation at low temperatures and low film-forming ability) limited its application.
Therefore, starch is usually modified to obtain a particular property and to cater the requirements for its tailor-made. However, the intact starch granules inhibit chemical reagents from making contact with the molecules in the crystalline region, thus the chemical reactivity and reaction efficiency ofnative starch is usually low. There are many methods to modify the structure inthe crystalline region, or decrease the size of crystalline regions to increase reaction activity of starch and convert native starch into cold water-soluble starch. The Cold Water Solubility (CWS) is an important indicator for evaluation the physical properties of starch. It shows the water binding capacityof starch. The CWS is related with the molecular structure of starch, particle size and the content of amylase Cold-water soluble corn starch was first produced byEastman and Moore (Eastman, 1984), by slurring cassava starch in selected aqueous alcohols under the hightemperature and pressure. A method for preparinggranular cold water swelling/soluble starches byalcoholic-alkali treatments has been studied by Lim andJane (1992). Subsequently, some different origingranular cold-water-soluble starch such as cold-watersolublecassava starch (Singh and Singh, 2003), coldwatersoluble banana starch (Arturo et al., 2000), coldwater-soluble potato starch were prepared and studiedusing the alcoholic-alkaline method.
In this study, we reported an easy method to modify cassava starch through hydrolyzing by using Noah solution as hydrolytic agent and reprecipitatedout from the starch solution by addingethanol drop-wise. The aim of this study is to improvethe CWS of corn starch and to activate its reactionability of esterification. Also, the mechanism of themethod could improve the CWS and the esterificationreaction activity of corn starch was investigated. Tostudy the effect of process conditions on the CWS ofPS, a number of experiments were performed at various ratio of NaOH and the concentration of theaqueous solution of NaOH. Furthermore, theeffect of the pre-cooling temperature and the amount ofethanol on the CWS were explored. The esterificationreaction activity of PS with different CWS wascompared with NS.

THE EFFECTS OF ESTERIFICATION ON COLD WATER SOLUBILITY OF CASSAVA STARCH
For more Info, call us on
+234 8130 686 500
or
+234 8093 423 853

Share This
  • Type: Project
  • Department: Bio-Chemistry
  • Project ID: BCH0257
  • Access Fee: ₦5,000 ($14)
  • Pages: 51 Pages
  • Format: Microsoft Word
  • Views: 499
Payment Instruction
Bank payment for Nigerians, Make a payment of ₦ 5,000 to

Bank GTBANK
gtbank
Account Name Obiaks Business Venture
Account Number 0211074565

Bitcoin: Make a payment of 0.0005 to

Bitcoin(Btc)

btc wallet
Copy to clipboard Copy text

500
Leave a comment...

    Details

    Type Project
    Department Bio-Chemistry
    Project ID BCH0257
    Fee ₦5,000 ($14)
    No of Pages 51 Pages
    Format Microsoft Word

    Related Works

    ABSTRACT The fresh cassava were sources from Idodo in Nkanu Local Government of Enugu state. The weight of the cassava tuber were taken to be 31.50kg. After peeling and washing, it was divided into two equal parts which was 21.13kg for production of sample A and sample B respectively (edible and textile starch) which weighed 13.1kg. During this... Continue Reading
    ABSTRACT The fresh cassava were sources from Idodo in Nkanu Local Government of Enugu state. The weight of the cassava tuber were taken to be 31.50kg. After peeling and washing, it was divided into two equal parts which was 21.13kg for production of sample A and sample B respectively (edible and textile... Continue Reading
    ABSTRACT The fresh cassava were sources from Idodo in Nkanu Local Government of Enugu state. The weight of the cassava tuber were taken to be 31.50kg. After peeling and washing, it was divided into two equal parts which was 21.13kg for production of sample A and sample B respectively (edible and textile starch) which weighed 13.1kg. During this... Continue Reading
    ABSTRACT This work is aimed at the production of laundry starch, using locally sourced raw material (cassava tuber), by extraction of the starch granules from the tubers, 80kg of the harvested fresh cassava tubers were peeled and washed twice to remove dirt and earth. The peeled cassava tubers were re-weighed. 75kg of the peeled tubers was grated... Continue Reading
    PRODUCTION OF STARCH FROM CASSAVA (M aihot esculanta ) AND ITS CROSS LINKED DERIVATIVES CHAPTER ONE 1.0     INTRODUCTION Starch can be obtained from cassava, sorghum, maize, sago and potatoes. But this project focused on the production of starch from cassava. Starch can be cross-linked a product that will be suitable for noodle, salad cream... Continue Reading
    ABSTRACT Lecithin is used for applications in human food, animal feed, pharmaceuticals, paints, and other  industrial applications, but consistent importation of lecithin has a negative effect on foreign  exchange leading to devaluation of the naira. The need to explore locally available products such  as cassava starch as a possible substitute... Continue Reading
    ABSTRACT Lecithin is used for applications in human food, animal feed, pharmaceuticals, paints, and other  industrial applications, but consistent importation of lecithin has a negative effect on foreign  exchange leading to devaluation of the naira. The need to explore locally available products such  as cassava starch as a possible substitute... Continue Reading
    ABSTRACT T he present study investigated herb-drug interactions involving cold water extract of Azadirachta indica (neem) leaves, with five classes of antibiotics, namely: Tetracyclines - Tetracycline (TET) and Doxycycline POX); I Penicillins - Penicillin G(PG) and Ampicillin (AMP); Cephalosporins - Cefuroxime (CF); Arninoglycosides -Gentamicycin... Continue Reading
    ABSTRACT This project research work was based on dehydration of ethanol water solution using activated starch. The extracted starch obtained was of whistler method. The starch obtained from potato was weighed with the use of a weighing balance, 0.1gram of activated starch weighted for... Continue Reading
    ABSTRACT This project research work was based on dehydration of ethanol water solution using activated starch. The extracted starch obtained was of whistler method. The starch obtained from potato was weighed with the use of a weighing balance, 0.1gram of activated starch weighted for... Continue Reading
    Call Us
    whatsappWhatsApp Us