Dissertation > Excellent graduate degree dissertation topics show

Extraction of Fat and Concentration of Polyunsaturated Fatty Acids in Dendrolimus Punctatus Walker

Author: YangQing
Tutor: WeiMeiCai;LiuGaoQiang
School: Central South University of Forestry Science and Technology
Course: Forest Protection
Keywords: Dendrolimus punctatus Walker larva gross fat polyunsaturated fatty acids low temperature crystallization urea complexation
CLC: S763.421
Type: Master's thesis
Year: 2008
Downloads: 49
Quote: 0
Read: Download Dissertation

Abstract


Dendrolimus punctatus Walker is one kind of serious forestry insect pests in our country. However, it is also a beneficent biology resource with potential development value from the aspect of nutrition. The oil extraction, physic-chemical properties of oil, concentrating poly-unsaturated fatty acids from the larva of D. punctatus were studied in this dissertation.This paper studied the influence of solvent, the percentage of insect powder and solvent, extraction temperature and time on gross fat of Dendrolimus punctatus Walker. It also used orthogonal-experiment design to improve extraction methodology of gross fat. The result showed that the better extraction solvent, percentage of insect powder and solvent, extraction temperature and time were as follows:petroleum ether,1:10,30℃,2h. The extraction percentage of gross fat was 93.30% under this extraction condition.The oil value of iodine, acids, peroxidation, specific gravity and saponification of the pupae of Dendorlimus punctatus Walker were 125.67 gI2/100g,1.59 mg/g, 10.34meq/kg,0.9137g/g,163.48mg/g, respectively. The results of concentration of polyunsaturated fatty acids with low temperature crystallization showed that time and temperature of low temperature of crystallization had obvious influence on the concentration of polyunsaturated fatty acids. The better concentration condition of temperature and time was as the follows:crystallization temperature was -8℃, crystallization time was 18h, the iodine value and peroxidation value under this condition were 230.01 gI2/100g,61.75%, respectively.The concentration of polyunsaturated fatty acids of Dendorlimus punctatus Walker with the method of urea complexation showed that factors of quality percentage of fatty acid and urea, time and temperature of crystallization had obvious influence on the concentration of polyunsaturated fatty acids of it. The better urea complexation condition were:quality percentage of fatty acid and urea was 1:6, crystallization time was 12h, crystallization temperature was 0℃, the iodine value and peroxidation value under this condition was 261.32gI2/100g,50.41% respectively under this condition.This was the first dissertation which made systematically study on the extraction of oil, the physic-chemical properties and concentration of Dendorlimus punctatus Walker in our country. The results obtained in the dissertation would be useful for the further study and development of functional foods and other products related to Dendrolimus punctatus Walker.

Related Dissertations

  1. The Clinical Study of ω-3 Polyunsaturated Fatty Acids in Severe Brain Injury Complicated by Lung Infection,R651.1
  2. The Influence of Omega 3 Polyunsaturated Fatty Acid on the Immune Function of Sepsis,R459.7
  3. Preliminary Experimental Anticancer Mechanism of Domestica Larva Antimicrobial Peptides to Tumor Cells K562,R965
  4. Effect of ω-3 Polyunsaturated Fatty Acid on Acute Lung Injury Patients’ Plasma TNF-α、IL-6、IL-10,R563.8
  5. Preparation of Luidia Quinaria Von Martens’ Main Active Substances and Research on the Activity of Luidia Quinaria Von Martens’ Acidic Mucopolysaccharide,R151
  6. The Enzymatic Synthesis of Triglycerides Containing n-3 Polyunsaturated Fatty Acids,TQ645.6
  7. Study on Low-temperature Synthesis and Photocatalytic Performance of Ti-based Catalyst,O643.36
  8. Echinococcus granulosus ( Chinese mainland strain ) recombinant antigen Eg14-3-3 immune protection and immune mechanisms,R392
  9. Research on Fatty Acid Δ5 Fatty Acid Desaturases in EPA and AA Biosynthesis of Phaeodactylum Tricornutum,Q946
  10. Morphology and Chaetotaxy of Larvae in Some Panorpidae (Mecoptera) with Phylogenetic Analysis,Q965
  11. Effects of Supplementation with Different Kinds of Oils on the Reproductive Performance of Breeding Boars and Male SD Rats,S865.12
  12. Expression of C. Elegans fat-1 in Rabbit Fetal Fibroblast Cells,S829.1
  13. Effects of Dietary Addition of ω-3 PUFA on Laying Performance, Lipid Metabolism and Immune Function for Shao Ducks,S834
  14. The Relationship between the Level of Very Long Chain Polyunsaturated Fatty Acid in Plasma and NF-κB Gene Polymorphism in Patients with Type 2 Diabetes,R587.1
  15. Effects of n-3 PUFAs Diet on Obesity Mice and Construction of Knock-In Vector for Fat-1 Transgenic Mice,R151.4
  16. Protective Effect of ω-3 Polyunsaturated Fatty Acid on Renal Function in Rats with Obstructive Jaundics,R657.4
  17. Study of the Effect of PUFAs on LPS-induced Dopaminergic Neurons Injury and Mechanisms,R742.5
  18. Study on Effects of Different Lipids on Enrichment of n-3 Pufa in Chicken,S831.5
  19. Effect of ω-3 Polyunsaturated Fatty Acids on Serum C-reactive Protein in Patients with Severe Brain Injury,R651.15
  20. ω-3 Fish Oil Emulsion on Severe Acute Intestinal Barrier Function,R657.51

CLC: > Agricultural Sciences > Forestry > Forest Protection > Forest Pest and Disease Control > Pest and its control > Lepidoptera pests > Dendrolimi
© 2012 www.DissertationTopic.Net  Mobile