Evidence map›Paper›PMID 31288471›Full record

ArticleFoods (Basel, Switzerland)2019

Phenolic and Antioxidant Analysis of Olive Leaves Extracts (

Irena Žuntar, Predrag Putnik, Danijela Bursać Kovačević, Marinela Nutrizio, Filip Šupljika, Andreja Poljanec, Igor Dubrović, Francisco J Barba, Anet Režek Jambrak

Open access · goldAbstract read
In one paragraph

Article in Foods (Basel, Switzerland), 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
5.7field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

26 citing papers in PubMed, 81 citations in OpenAlex.

  1. Article
  2. 3,3'-Di-O-methylellagic Acid Isolated fromPharmaceuticals (Basel, Switzerland) · 2026
    Article
  3. Bioactive Compounds from Dandelion (Foods (Basel, Switzerland) · 2026
    Review
  4. Article
  5. Review
  6. Article
  7. Review
  8. Article
  9. Review
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Review
  16. Article
  17. Review
  18. Article
  19. Article
  20. Assessment of the Efficacy of Olive Leaf (Molecules (Basel, Switzerland) · 2021
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 3 institutions in 2 countries.

Irena ŽuntarFaculty of Pharmacy and Biochemistry, University of Zagreb, 10000 Zagreb, Croatia.ORCID 0000-0002-6793-6263
Predrag PutnikFaculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia.
Danijela Bursać KovačevićFaculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia.
Marinela NutrizioFaculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia.ORCID 0000-0002-2589-7745
Filip ŠupljikaFaculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia.
Andreja PoljanecFaculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia.
Igor DubrovićTeaching Institute for Public health of Primorje-Gorski Kotar County, 51000 Rijeka, Croatia.ORCID 0000-0002-2226-0271
Francisco J BarbaNutrition and Food Science Area, Preventive Medicine and Public Health, Food Sciences, Toxicology and Forensic Medicine Department, Faculty of Pharmacy, Universitat de València, Avda. Vicent Andrés Estellés, s/n, Burjassot, 46100 València, Spain.ORCID 0000-0002-5630-3989
Anet Režek JambrakFaculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia. anet.rezek.jambrak@pbf.hr.
University of Zagreb · HRInstitute of Public Health Zadar · HRUniversitat de València · ES

Funding

Hrvatska Zaklada za Znanost IP-2016-06-1913
6 · The paper itself

Abstract

backgroundThe aim of this study was to evaluate high voltage electrical discharges (HVED) as a green technology, in order to establish the effectiveness of phenolic extraction from olive leaves against conventional extraction (CE). HVED parameters included different green solvents (water, ethanol), treatment times (3 and 9 min), gases (nitrogen, argon), and voltages (15, 20, 25 kV).

methodsPhenolic compounds were characterized by ultra-performance liquid chromatography-tandem mass spectrometer (UPLC-MS/MS), while antioxidant potency (total phenolic content and antioxidant capacity) were monitored spectrophotometrically. Data for Near infrared spectroscopy (NIR) spectroscopy, colorimetry, zeta potential, particle size, and conductivity were also reported.

resultsThe highest yield of phenolic compounds was obtained for the sample treated with argon/9 min/20 kV/50% (3.2 times higher as compared to CE). Obtained results suggested the usage of HVED technology in simultaneous extraction and nanoformulation, and production of stable emulsion systems. Antioxidant capacity (AOC) of obtained extracts showed no significant difference upon the HVED treatment.

conclusionsEthanol with HVED destroys the linkage between phenolic compounds and components of the plant material to which they are bound. All extracts were compliant with legal requirements regarding content of contaminants, pesticide residues and toxic metals. In conclusion, HVED presents an excellent potential for phenolic compounds extraction for further use in functional food manufacturing.

Indexed as

eco-extractiongreen solventshigh voltage electrical dischargeolive leaves extractssustainability

Identifiers

PMID31288471
PMCPMC6678916
OpenAlexW2954182741

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.