東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Quantifying antioxidant activity of ...

Bangalore, Dharmendra Vijiyendranathan.

FindBook

Google Book

Amazon

博客來

Quantifying antioxidant activity of lycopene and influence of watermelon maturity on tissue ultrastructure and lycopene distribution.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Quantifying antioxidant activity of lycopene and influence of watermelon maturity on tissue ultrastructure and lycopene distribution./
作者:	Bangalore, Dharmendra Vijiyendranathan.
面頁冊數:	88 p.
附註:	Adviser: William McGlynn.
Contained By:	Dissertation Abstracts International67-06B.
標題:	Agriculture, Food Science and Technology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3221777
ISBN:	9780542727122

Quantifying antioxidant activity of lycopene and influence of watermelon maturity on tissue ultrastructure and lycopene distribution.
Bangalore, Dharmendra Vijiyendranathan.

Quantifying antioxidant activity of lycopene and influence of watermelon maturity on tissue ultrastructure and lycopene distribution. - 88 p.

Adviser: William McGlynn.

Thesis (Ph.D.)--Oklahoma State University, 2006.

Scope and method of study. Lycopene, a lipophilic antioxidant, plays a crucial role in biological systems. Watermelon, a natural source of lycopene (&sim;v48.7mug/g), could be a useful ingredient in functional foods. Correlating lycopene concentration in a food product with its antioxidant activity would hence be critical in determining effective and economical rates of lycopene addition. Also, it is necessary to understand the association of lycopene with other structural organelles during melon maturation, while designing processes to maximize lycopene retention in watermelon-based extracts and/or functional foods. The objectives outlined in this study include: (i & ii) correlating the antioxidant activity of lycopene with lycopene concentration using the a modified ORACFL assay involving the use of beta-cyclodextrin (beta-CD) and randomly methylated beta-cyclodextrin (RMCD) separately as solubility enhancers, (iii) studying watermelon ultrastructure and relating melon maturity to the distribution and organization of lycopene within structural organelles in watermelon mesocarp. Lycopene was extracted (from Lyc-O-Mato(TM) 6% extract) by a modified spectrophotometric assay developed by inclusion of beta-CD and RMCD separately (at concentrations of 0, 0.4, 0.8 & 1.6%) and the antioxidant activity of lycopene measured with ORACFL assay. Experiments were conducted in quadruplicate and statistical pooled correlations analyzed. Also for the third objective study employed Transmission Electron Microscopy (TEM) to conduct research on the ultrastructure of watermelon mesocarp for watermelon obtained at different maturities.

ISBN: 9780542727122Subjects--Topical Terms:

1017813
Agriculture, Food Science and Technology.

Quantifying antioxidant activity of lycopene and influence of watermelon maturity on tissue ultrastructure and lycopene distribution.
LDR:03418nam 2200277 a 45 001 967720
005 20110915
008 110915s2006 eng d
020 $a 9780542727122
035 $a (UMI)AAI3221777
035 $a AAI3221777
040 $a UMI $c UMI
100 1 $a Bangalore, Dharmendra Vijiyendranathan. $3 1291588
245 1 0 $a Quantifying antioxidant activity of lycopene and influence of watermelon maturity on tissue ultrastructure and lycopene distribution.
300 $a 88 p.
500 $a Adviser: William McGlynn.
500 $a Source: Dissertation Abstracts International, Volume: 67-06, Section: B, page: 2892.
502 $a Thesis (Ph.D.)--Oklahoma State University, 2006.
520 $a Scope and method of study. Lycopene, a lipophilic antioxidant, plays a crucial role in biological systems. Watermelon, a natural source of lycopene (&sim;v48.7mug/g), could be a useful ingredient in functional foods. Correlating lycopene concentration in a food product with its antioxidant activity would hence be critical in determining effective and economical rates of lycopene addition. Also, it is necessary to understand the association of lycopene with other structural organelles during melon maturation, while designing processes to maximize lycopene retention in watermelon-based extracts and/or functional foods. The objectives outlined in this study include: (i & ii) correlating the antioxidant activity of lycopene with lycopene concentration using the a modified ORACFL assay involving the use of beta-cyclodextrin (beta-CD) and randomly methylated beta-cyclodextrin (RMCD) separately as solubility enhancers, (iii) studying watermelon ultrastructure and relating melon maturity to the distribution and organization of lycopene within structural organelles in watermelon mesocarp. Lycopene was extracted (from Lyc-O-Mato(TM) 6% extract) by a modified spectrophotometric assay developed by inclusion of beta-CD and RMCD separately (at concentrations of 0, 0.4, 0.8 & 1.6%) and the antioxidant activity of lycopene measured with ORACFL assay. Experiments were conducted in quadruplicate and statistical pooled correlations analyzed. Also for the third objective study employed Transmission Electron Microscopy (TEM) to conduct research on the ultrastructure of watermelon mesocarp for watermelon obtained at different maturities.
520 $a Findings and conclusions. Lycopene concentration correlated poorly with ORACFL (R2=0.33) in the absence of either beta-CD or RMCD. Correlations improved both with increasing levels of beta-CD (R 2=0.58 and 0.91 for 0.4 and 0.8% beta-CD respectively) and RMCD (R2=0.9284 and 0.9959 for 0.4 and 0.8% RMCD respectively). A very high beta-CD concentration (1.6%) decreased the correlation between ORAC and lycopene concentration. Inclusion of cyclodextrins in ORACFL assay improves correlation between ORAC and lycopene concentration, thus expanding the scope of the ORACFL assay for similar other fat soluble antioxidants. Electron micrographs from TEM studies showed chromoplasts changing from less organized globular form in immature to a definite, symmetrical form in mature and finally to an asymmetrical structure in over-mature melons.
590 $a School code: 0664.
650 4 $a Agriculture, Food Science and Technology. $3 1017813
690 $a 0359
710 2 0 $a Oklahoma State University. $3 626630
773 0 $t Dissertation Abstracts International $g 67-06B.
790 $a 0664
790 1 0 $a McGlynn, William, $e advisor
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3221777