NDLI: Characterization and Conversion of Microbial Pigments into Water Soluble Pigments for Application in Food Products

Content Provider	Springer Nature Link
Author	Attri, D. Joshi, Vinod Kumar
Copyright Year	2013
Abstract	Microbial colours with different shades like pink (Rhodotorula), red (Chromobacterium), yellow (Sarcina) and light yellow (Micrococcus) using apple pomace (a waste from apple juice) were produced by solid state fermentation, characterized and modified into water soluble pigments. Biocolour from Rhodotorula had maximum absorption in ethanol, hexane and acetone at 200–550 nm with λ-max between 480 and 490 nm. In case of Chromobacterium sp., ethanol, petroleum ether and hexane gave the highest absorption between 520 and 540 nm (narrow range). Pigment of Micrococcus sp., had maximum absorption between 200 and 400 nm with λ-max in narrow range (400–600 nm) scanning between 480 and 490 nm in ethanol. Dark yellow colour pigment of Sarcina gave the maximum absorption between 200 and 500 nm in ethanol. All the biocolours examined were carotenoids, insoluble in water and thus, have limited applications in food. Aminoacid, benzoic acid and gelatin were employed to make these pigments water soluble by reflexing at different pH values viz., 3, 7 and 9.2 for each pigment. Maximum conversion (51 %) of pigment of Rhodotorula occurred using gelatin at pH 9.2. In case of Chromobacterium using amino acetic acid at pH 9.2 it was 60 %. It was 55 and 56 % at pH 7 and 3, respectively. In Sarcina, at pH 9.2 maximum conversion (48 %) took place using amino acetic acid, whereas in pigment of Micrococcus sp. 40 % conversion took place using amino acetic acid at pH 9.2 and the minimum conversion occurred using amino benzoic acid at pH 3. It is concluded that the pigments produced by Rhodotorula, Micrococcus and Chromobacterium can be modified chemically to make them water soluble thus, making possible their use in various food products.
Starting Page	1053
Ending Page	1058
Page Count	6
File Format	PDF
ISSN	03698211
Journal	Proceedings of the National Academy of Sciences, India Section B: Biological Sciences
Volume Number	84
Issue Number	4
e-ISSN	22501746
Language	English
Publisher	Springer India
Publisher Date	2013-11-16
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Life Sciences Plant Biochemistry Nucleic Acid Chemistry Microbial biocolours Behavioural Sciences Solubility Pigments Conversion Apple pomace
Content Type	Text
Resource Type	Article
Subject	Environmental Science Agricultural and Biological Sciences

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