Browsing by Author "Dissanayake, DMMB"

Now showing 1 - 4 of 4

item: Conference-Extended-Abstract
Extraction of chlorophyll from 'mukunuwenna'
(2006) Dissanayake, DMMB; Amarasinghe, ADUS; Amarasinghe, BMWPK
Chlorophyll is the green colouring matter found in many plants formed in the chloroplast of their cells usually under the influence of sunlight and is necessary for the process of photosynthesis. Amongst the main types of chlorophyll exist in natural plants; chlorophyll a and chlorophyll b are very important. Chlorophyll and chlorophyll derivatives are used in the industry as a stable, non-toxic, physiologically harmless colorant of foods, cosmetics and medicines. Chlorophyll with 0.1% or less metal can be used as gasoline additive and has a definite antiknock effect. Chlorophyll accelerates the vulcanization of rubber [1]. Furthermore the anti-mutagenic and anti-carcinogenic activities of chlorophyll have been proved and hence some studies are being carried out to use it in medicines [2].
item: Conference-Extended-Abstract
Mathematical modeling of extraction of chlorophyll from alternanthera sessilis cultivated in Sri Lanka
(2009) Jinasena, MAM; Dissanayake, DMMB; Amarasinghe, ADUS; Amarasinghe, BMWPK; Prashantha, MAB
Mass transfer modeling was used to study the extraction efficiency and the effect of temperature on solvent extraction of chlorophyll from. Alternanthera sessilis, which is a leafy vegetable cultivated in tropics and sub tropics. Aqueous I acetone with 80% (v/v) was used as the solvent and the chlorophyll concentration was analyzed spectrophotometrically. The experimental results were in good agreement with the model data for temperatures | below 30 C. The degradation of chlorophyll beyond 30 C was found to be significant.
item: Article-Abstract
Study on extraction of chlorophyll from Altemanthera Sessilis (Linn.) : operating conditions and mass transfer
Jinasena, MAM; Amarasinghe, ADUS; Amarasinghe, BMWPK; Prashantha, MAB; Dissanayake, DMMB
Chlorophyll is a widely used ingredient for various applications including medicines, food supplements, cosmetics and toiletries. It is extracted traditionally from alfalfa, spinach and algae. Altemanthera sessilis, commonly known as mukunuwenna available in Sri Lanka is proposed for the extraction of chlorophyll The extraction was carried out using buffered 80% aqueous acetone. The optimum operating conditions; solvent to A. sessilis ratio, extraction temperature and extraction time found to be 5 ml/g, 50°C and 45 minutes, respectively. The yield of chlorophyll a and chlorophyll b under the optimum operating conditions are 659 and 261 ug/g of A. sessilis respectively and comparison of results obtained on yield with the reported data is presented. Furthermore, the transfer from the soiid to the solvent for various operating temperatures was modelled and Abstract: were mass validated with the experimental results.
item:
Study on extraction of Chlorophyll from AlternantheraSessilis (Linn.) : operating conditions and mass transfer,
(2015-06-09) Jinasena, MAM; Amarasinghe, ADUS; Prashantha, MAB; Dissanayake, DMMB; Amarasinghe, BMWPK;
Chlorophyll is a widely used ingredient for various applications including medicines food supplements, cosmetics and and toiletries. It is extracted traditionally from alfalfa, spinach and algae. Altemanthera sessilis, commonly known as mukunuwenna available in Sri Lanka is proposed for the extraction of chlorophyll. The extraction was carried out using buffered 80% aqueous acetone. The optimum operating conditions; solvent to A. sessilis ratio, extraction temperature and extraction time were found to be 5 ml/g, 50°C and 45 minutes, respectively. The yield of chlorophyll a and chlorophyll h under the optimum operating conditions are 659 and 261 pg/g of A. sessilis respectively and comparison of results obtained on yield with the reported data is presented. Furthermore, the mass transfer from the solid to the solvent for various operating temperatures was modelled and validated with the experimental results.