Effect of Spray Drying Encapsulation on Nettle Leaf Extract Powder Properties, Polyphenols and Their Bioavailability

Cegledi, Ena; Garofulić, Ivona Elez; Zorić, Zoran; Roje, Marin; Dragović–Uzelac, Verica

doi:10.3390/foods11182852

Cited by 13 publications

(13 citation statements)

References 61 publications

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“…The carrier materials formed a strong three-dimensional protective network around the core material, which inhibited the movement of the droplet matrix and had stronger mechanical properties against particle adhesion in the SD chamber, but fine particle losses could occur through an exhaust air filter during spray drying and during manual manipulation of the powder [ 33 , 34 , 35 ]. The product yield of encapsulated nettle extracts ranged from 64.63 to 87.23%, and the type and proportion of the carrier significantly affected the product yield [ 36 ]. In general, a higher carrier-to-oil ratio and a higher drying temperature during SD had a positive effect on the product yield of the obtained SBO powders.…”

Section: Resultsmentioning

confidence: 99%

Optimization of the Spray-Drying Encapsulation of Sea Buckthorn Berry Oil

Čulina

Zorić

Garofulić

et al. 2023

Foods

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The aim of this study was to evaluate the effect of spray-drying parameters on the physicochemical properties of encapsulated sea buckthorn berry oil. Different carriers (gum arabic, β-cyclodextrin, and their mixture (1:1, w/w)), inlet air temperatures (120, 150, and 180 °C), and carrier-to-oil ratios (2, 3, and 4, w/w) were evaluated. The obtained powders were characterized in terms of the product yield (36.79–64.60%), encapsulation efficiency (73.08–93.18%), moisture content (0.23–3.70%), hygroscopicity (1.5–7.06 g/100 g), solubility (19.55–74.70%), bulk density (0.25–0.44 g/L), total carotenoid content (mg/100 g dm), and antioxidant capacity (871.83–1454.39 μmol TE/100 g dm). All physicochemical properties were significantly affected by the carrier-to-oil ratio and inlet air temperature. Higher carrier-to-oil ratios increased the product yield, encapsulation efficiency, solubility, and bulk density and decreased the powder hygroscopicity. Elevating the drying temperatures during spray drying also increased the product yield, encapsulation efficiency, and solubility, while it decreased the powder moisture content, total carotenoid content, and antioxidant capacity. Based on the physicochemical properties, the use of β-cyclodextrin as a carrier, a drying temperature of 120 °C, and a carrier-to-oil ratio of 4 were selected as optimal conditions for the production of sea buckthorn berry oil powder. The obtained powder is a valuable material for a wide range of applications in the food and nutraceutical industries.

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Section: Resultsmentioning

confidence: 99%

Optimization of the Spray-Drying Encapsulation of Sea Buckthorn Berry Oil

Čulina

Zorić

Garofulić

et al. 2023

Foods

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“…The powders' solubility was determined using a previously described method [15] and calculated using the following equation:…”

Section: Solubilitymentioning

confidence: 99%

“…The hygroscopicity of the obtained powders was determined as previously described [15] and expressed as g of absorbed moisture per 100 g of powder according to the equation:…”

Section: Hygroscopicitymentioning

confidence: 99%

“…The bioaccessibility of polyphenols encapsulated in the powders was examined in a simulated three-step in vitro digestion following a recently described methodology [15]. Briefly, 250 mg of powders (750 µL of laurel leaf extract) was mixed with 800 µL of pepsin solution (40 mg mL −1 ) and 10 mL of 0.9% NaCl solution in 50 mL Falcon tubes.…”

Section: Bioaccessibility Of Polyphenolsmentioning

confidence: 99%

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Physicochemical Properties, Antioxidant Capacity, and Bioavailability of Laurus nobilis L. Leaf Polyphenolic Extracts Microencapsulated by Spray Drying

Dobroslavić

Garofulić

Zorić

et al. 2023

Foods

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Laurel (Laurus nobilis L.) leaves are a rich source of polyphenols with the potential for use in functional foods, where the main obstacle is their low stability and bioavailability, which can be improved by spray drying (SD). This research examined the influence of SD parameters, including inlet temperature (120, 150, and 180 °C), carrier type (β-cyclodextrin (β-CD); β-CD + maltodextrin (MD) 50:50; β-CD + gum arabic (GA) 50:50), and sample:carrier ratio (1:1, 1:2 and 1:3) on the physicochemical properties, encapsulation efficiency, polyphenolic profile, antioxidant capacity and bioaccessibility of laurel leaf polyphenols. The highest encapsulation efficiency was achieved at a sample:carrier ratio 1:2 and the temperature of 180 °C by using either of the applied carriers. However, the application of β-CD + MD 50:50 ensured optimal solubility (55.10%), hygroscopicity (15.32%), and antioxidant capacity (ORAC 157.92 μmol Trolox equivalents per g of powder), while optimal moisture content (3.22%) was determined only by temperature, demanding conditions above 150 °C. A total of 29 polyphenols (dominantly flavonols) were identified in the obtained powders. SD encapsulation increased the bioaccessibility of laurel flavonols in comparison to the non-encapsulated extract by ~50% in the gastric and ~10% in the intestinal phase, especially for those powders produced with carrier mixtures.

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“…In a reaction with the free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH•), the antioxidant capacity of the samples was evaluated [17]. The reaction mixture was incubated at room temperature for 20 min, and the absorbance was measured at 517 nm (UV-VIS UviLine 9400, Secomam, France).…”

Section: Dpph (22-diphenyl-1-picrylhydrazyl Radical) Assaymentioning

confidence: 99%

Efficiency of Microwave and Ultrasound-Assisted Extraction as a Green Tool for Polyphenolic Isolation from Monofloral Honeys

Pedisić,

Čulina,

Pavlešić

et al. 2023

Processes

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Monofloral honey is obtained from the nectar of single-source plants and has a higher market value due to its polyphenol content associated with its biological properties, especially its antioxidant capacity. In this work, advanced extraction techniques using microwave- (MAE) and ultrasound-assisted (UAE) extraction of phenolic compounds in monofloral honey were optimized and compared. Optimal parameters for MAE were an irradiation time of 15 min, a temperature of 60 °C, and a microwave power of 300 W, and for UAE, a sonication time of 10 min, a temperature of 35 °C, and an ultrasound amplitude of 60%. The extraction solvent used was 70% ethanol. In the extracts of different monofloral honey samples (mint, fennel, raspberry, lavender, sage, buckwheat, maroon, heaven) obtained at optimal MAE and UAE conditions, polyphenolic compounds were determined using UPLC-ESI/MS2 analysis and antioxidant capacity using ORAC, ABTS, and DPPH assays. The results showed that UAE was the more efficient technique for the extraction of total flavanones, flavones, hydroxycinnamic acids, and total phenols, and MAE for total flavonols and hydroxybenzoic acids. The antioxidant ORAC and DPPH capacity was higher for the extracts obtained with MAE, while the ABTS capacity was higher for those obtained with UAE.

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Effect of Spray Drying Encapsulation on Nettle Leaf Extract Powder Properties, Polyphenols and Their Bioavailability

Cited by 13 publications

References 61 publications

Optimization of the Spray-Drying Encapsulation of Sea Buckthorn Berry Oil

Optimization of the Spray-Drying Encapsulation of Sea Buckthorn Berry Oil

Physicochemical Properties, Antioxidant Capacity, and Bioavailability of Laurus nobilis L. Leaf Polyphenolic Extracts Microencapsulated by Spray Drying

Efficiency of Microwave and Ultrasound-Assisted Extraction as a Green Tool for Polyphenolic Isolation from Monofloral Honeys

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