Recovery of bioactive compounds from an agro-industrial waste: extraction, microencapsulation, and characterization of jaboticaba(<i>Myrciaria cauliflora Berg</i>) pomace as a source of antioxidant

SANTOS, SUELEN S. DOS; PARAÍSO, CAROLINA M.; COSTA, SILVIO CLÁUDIO DA; OGAWA, CAMILLA YARA L.; SATO, FRANCIELLE; MADRONA, GRASIELE S.

doi:10.1590/0001-3765202220191372

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CROP SCIENCE • An. Acad. Bras. Ciênc. 94 (4) • 2022 • https://doi.org/10.1590/0001-3765202220191372 copy

Recovery of bioactive compounds from an agro-industrial waste: extraction, microencapsulation, and characterization of jaboticaba(Myrciaria cauliflora Berg) pomace as a source of antioxidant

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

This study aimed to evaluate the extraction of bioactive compounds from jaboticaba pomace, produce microcapsules by spray dryer technique, and characterize antioxidant compounds. A factorial experimental design was used in the extraction step. Maltodextrin (DE 10) was used as an encapsulating agent, in a ratio of 1: 1 (w/w), in the microencapsulation process. It was observed the increase of all bioactive compounds analyses comparing jaboticaba pomace with the extract. ATR-FTIR spectroscopy showed a vibrational stretching aromatic ring (1718 – 1731 cm^-1) typical for anthocyanins. The Gaussian deconvolution presented extract peak area 7.56% higher than pomace. The encapsulating agent protected anthocyanins during the drying process. Microencapsulation of bioactive compounds from jaboticaba pomace can be useful for food applications whereas they are a rich source of antioxidant compounds. Moreover, the use of agro-industrial waste is promising linked to the use of clean technology as water as an antioxidant extractor.

Key words
natural antioxidants; encapsulation; spray drying; ATR-FTIR

Factor	TPC		TMA		TF		DPPH		ABTS
Factor	Coefficient	p-Value	Coefficient	p-Value	Coefficient	p-Value	Coefficient	p-Value	Coefficient	p-Value
Intercept
0	3.7345	<0.0000*	0.0577	<0.0000*	4.9649	<0.0000*	2.6843	<0.0000*	50.5432	<0.0000*
Linear
X₁	0.4949	<0.0000*	0.0050	0.0281*	0.7644	<0.0000*	0.6884	<0.0000*	10.1956	<0.0000*
X₂	-0.0167	0.8139	0.0035	0.1062	0.1258	0.3610	0.1105	0.1386	2.0440	0.1872
Interaction
X₁X₂	0.1999	0.0098*	0.0029	0.1828	0.3020	0.0363*	0.1637	0.0333*	2.7473	0.0813

	JP	JE	JM
TPC^I	11.41^e±0.91	76.77^a±5.33	36.39^c±2.07
TMA^II	0.16^c±0.03	0.46^b±0.07	0.56^b±0.01
TF^III	29.32^d±8.34	151.56^b±6.10	68.56^c±3.39
DPPH^IV	5.09^e±0.11	38.93^a±0.29	19.57^c±0.56
ABTS^V	119.00^e±16.31	840.56^a±10.60	390.06^c±15.72
FRAP^VI	333.98^e±5.87	2616.54^a±13.68	1398.21^c±20.71
L*	29.69^c±2.66	19.88^de±1.36	54.25^a±3.19
a*	14.42^d±0.15	13.02^d±0.31	28.42^b±0.49
b*	9.50^e±0.35	13.12^b±0.39	11.41^cd±0.19
C	17.27^d±0.14	18.49^d±0.16	30.62^b±0.53
H°	33.37^b ±1.18	45.20^a±1.47	21.88^d±0.13

Assignment *	Wavenumber (cm^-1)
Assignment *	JP	JE	JM	M	Literature reference
ν (O-H)	3316	3303	3292	3306	3300¹
ν_a (C-H)	2923	2932	2926	2924	2928²
ν (C=O)	1725	1718	1718	-	1720³
δ (O-H)	-	-	-	1640	1637⁶
ν (C-C)	1613	1603	1606	-	1600¹;1606⁴
ν(C-C) (conjugated with C=C)	1440	-	-	-	1440⁴
ν (C-H)	1225	1219	1232	1240	1233⁵
ν (C-O...H)	1146	1146	1148	1148	1149²
ν (C-O)	-	-	1076	1077	1079²
ν (C-O-C)	1020	1026	1017	1013	1020¹
ν (C-O-C) anydroglucose	-	-	931	929	924²

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[1] Correspondence to: Suelen Siqueira dos Santos E-mail: suelensiqueira.eng@gmail.com