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Diffusity of selective bioactive subtances in a release-on-command system

The objective of this study were to investigate the reaction of some plants; Lawsonia inermis, Stevia rebaudiana, Brassica oleracea and Allium sativum L towards the diffusivity and color stability. They were extracted and the bioactive compounds were studied. L. inermis was extracted by soxhlet appa...

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Main Author: Muhammad, Ida Idayu
Format: Monograph
Published: Faculty of Chemical and Natural Resource Engineering 2009
Online Access:http://eprints.utm.my/id/eprint/9135/
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spelling my.utm.91352010-06-02T01:59:17Z http://eprints.utm.my/id/eprint/9135/ Diffusity of selective bioactive subtances in a release-on-command system Muhammad, Ida Idayu The objective of this study were to investigate the reaction of some plants; Lawsonia inermis, Stevia rebaudiana, Brassica oleracea and Allium sativum L towards the diffusivity and color stability. They were extracted and the bioactive compounds were studied. L. inermis was extracted by soxhlet apparatus using ethanol and petroleum ether as solvent whereas ethanol and hexane were used in the extract of S. rebaudiana. All the extract was tested against B. subtilis (Gram-positive bacteria), E. coli (Gram-negative bacteria), A. fumigatus and yeast by disc diffusion method. Both extract showed good inhibitory effects towards the growth of the entire micro organism where the maximum inhibition (3.2±0.1 cm) was recorded for L. inermis against B. subtilis. Include in this project was also involves some preliminary observation on the colour stability of anthocyanin in B. oleracea towards the day of storage. Anthocyanins behave like pH indicators as a result of their amphoteric nature. Anthocyanin extracted from B. oleracea are most stable in regards to degradation by thermal and change it colour to red at pH 1 and pH 2, gradually change to purple as the pH is increased to neutral and change to yellow at pH 13 and pH 14. Besides, antibacterial starch (wheat)-based film also has been studied by incorporation of garlic oil from A. sativum L as a natural antibacterial agent. Initially, 10mg of garlic oil incorporated into the starch-based film was tested against two types of food pathogenic bacteria, E. coli and B. subtillis through two types of bacterial inhibition tests, (i) agar plate test and (ii) liquid broth test. From the study, a greater inhibitory effect was observed on B. subtillis. Faculty of Chemical and Natural Resource Engineering 2009-02-01 Monograph NonPeerReviewed Muhammad, Ida Idayu (2009) Diffusity of selective bioactive subtances in a release-on-command system. Project Report. Faculty of Chemical and Natural Resource Engineering, Skudai, Johor. (Unpublished)
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
description The objective of this study were to investigate the reaction of some plants; Lawsonia inermis, Stevia rebaudiana, Brassica oleracea and Allium sativum L towards the diffusivity and color stability. They were extracted and the bioactive compounds were studied. L. inermis was extracted by soxhlet apparatus using ethanol and petroleum ether as solvent whereas ethanol and hexane were used in the extract of S. rebaudiana. All the extract was tested against B. subtilis (Gram-positive bacteria), E. coli (Gram-negative bacteria), A. fumigatus and yeast by disc diffusion method. Both extract showed good inhibitory effects towards the growth of the entire micro organism where the maximum inhibition (3.2±0.1 cm) was recorded for L. inermis against B. subtilis. Include in this project was also involves some preliminary observation on the colour stability of anthocyanin in B. oleracea towards the day of storage. Anthocyanins behave like pH indicators as a result of their amphoteric nature. Anthocyanin extracted from B. oleracea are most stable in regards to degradation by thermal and change it colour to red at pH 1 and pH 2, gradually change to purple as the pH is increased to neutral and change to yellow at pH 13 and pH 14. Besides, antibacterial starch (wheat)-based film also has been studied by incorporation of garlic oil from A. sativum L as a natural antibacterial agent. Initially, 10mg of garlic oil incorporated into the starch-based film was tested against two types of food pathogenic bacteria, E. coli and B. subtillis through two types of bacterial inhibition tests, (i) agar plate test and (ii) liquid broth test. From the study, a greater inhibitory effect was observed on B. subtillis.
format Monograph
author Muhammad, Ida Idayu
spellingShingle Muhammad, Ida Idayu
Diffusity of selective bioactive subtances in a release-on-command system
author_facet Muhammad, Ida Idayu
author_sort Muhammad, Ida Idayu
title Diffusity of selective bioactive subtances in a release-on-command system
title_short Diffusity of selective bioactive subtances in a release-on-command system
title_full Diffusity of selective bioactive subtances in a release-on-command system
title_fullStr Diffusity of selective bioactive subtances in a release-on-command system
title_full_unstemmed Diffusity of selective bioactive subtances in a release-on-command system
title_sort diffusity of selective bioactive subtances in a release-on-command system
publisher Faculty of Chemical and Natural Resource Engineering
publishDate 2009
url http://eprints.utm.my/id/eprint/9135/
_version_ 1643645125976391680
score 13.211869

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