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Formulation of a Tropical Beverage by Applying Heat Treatment and High Hydrostatic Pressure

Carla Marengo-Orozcoorcid tiny, Martha Patricia Tarazona-Díaz*orcid tiny and Ligia Inés Rodríguezorcid tiny

Process Engineering and Industrial Systems Research Group, Department of Engineering, Jorge Tadeo Lozano University, Carrera 4 No 22-61, 110311 Bogotá, Colombia

Article history:

Received: 23 July 2019

Accepted: 7 August 2020

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Key words:

purple passion fruit, green passion fruit, carrot, high hydrostatic pressure, antioxidant capacity


Research backgroundPassion fruit and carrot have a good antioxidant capacity; however, their consumption is low. There is no information on their use in beverages or in processes such as high hydrostatic pressure, which provides the safety of the drink without affecting its quality.

Experimental approachIn this study the effect of high hydrostatic pressure (HHP; 500 MPa for 250 s at 25 °C) and thermal processing (at 65 °C for 10 min, 75 °C for 2 min and 95 °C for 1 min) were evaluated in the formulation of a cold-pressed beverage from purple passion fruit, green passion fruit and carrot juice, taking into account antioxidant capacity, vitamin C concentration, sensorial evaluation and microbiological growth at 8 °C. 

Results and conclusionsThe formulation containing 67 % purple passion fruit, 17 % green passion fruit and 17 % carrot was the one that stood out with its antioxidant capacity, high vitamin C concentration and sensorial evaluation. The HHP treatment preserved the antioxidant capacity and vitamin C concentration, and resulted in the best scent. Juices stored at 8 °C did not show microbial growth. 

Novelty and scientific contributionIn this study, we used tropical raw materials with good sensory acceptance and antioxidant capacity that could be used in the production of high value-added foods. Additionally, the research demonstrated that HHP is a conservation method that maintains the antioxidant capacity, vitamin C and aroma of the beverage to a greater extent than thermal treatments; the latter is of interest for its use in minimally processed products and functional food. 

*Corresponding author: (+571)2427030

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The Effect of Extracts and Essential Oil from Invasive Solidago spp. and Fallopia japonica on Crop-Borne Fungi and Wheat Germination

Sabina Anžlovar1*orcid tiny, Damjan Janeš2orcid tiny and Jasna Dolenc Koce1orcid tiny

1Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia

2Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000 Ljubljana, Slovenia

Article history:

Received: 16 January 2020

Accepted: 4 September 2020

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Key words:

antifungal activity, Fallopia japonica, essential oil, flower and leaf extracts, Solidago, Triticum aestivum


Research backgroundMany plant extracts and essential oils show antibacterial and antifungal activities, with potential to replace the use of synthetic fungicides. We used invasive alien plants goldenrod (Solidago spp.) and Japanese knotweed (Fallopia japonica) as source materials to determine their antifungal activities against seed-associated fungi from wheat grain (Alternaria alternata, Alternaria infectoria, Aspergillus flavus, Epicoccum nigrum and Fusarium poae).

Experimental approachAqueous and organic extracts (ethanol, methanol and acetone) were prepared from leaves and flowers of S. canadensis, S. gigantea and S. virgaurea, and leaves and rhizomes of F. japonica. Additionally, essential oils were distilled from Solidago flowers and leaves. The extracts and essential oils were tested as inhibitors of fungal growth in vitro. Solidago essential oils were tested also as antifungal agents for protection of wheat grain by determining its fungal infection and germination rate.

Results and conclusionsThe extracts showed a wide spectrum of low to moderate antifungal activities, with those of Solidago spp. generally more effective than those of F. japonica, and organic extracts more effective than aqueous extracts. The essential oils from leaves and flowers had similar antifungal activity and whole shoots can be collected for their production. This study presents the systematic study of the composition of essential oils from flowers and leaves of three widely distributed Solidago spp. in Slovenia, with the major constituents of terpenes and terpenoids α-pinene, germacrene D and bornyl acetate.

Novelty and scientific contributionThe study presents the first use of Solidago spp. and Fallopia japonica extracts and essential oils against fungal strains isolated from wheat grain.

*Corresponding author: +38613203325

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Name Surname1*orcid tiny, Name Surname2orcid tiny and Name Surname3orcid tiny


2Affiliation_2 (samo "ENTER" za novu afilijaciju, NE "SHIFT+ENTER")

Article history:

Received: DD Month YY

Accepted: 15 July 2020

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Key words:

Keyword1, Keyword2, Keyword3, Keyword4, ...


Research background. xxx

Experimental approach. xxx

Results and conclusions. xxx

Novelty and scientific contribution. xxx

*Corresponding author: +123456789

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