Effect of UV-C Radiation, Ultra-Sonication Electromagnetic Field and Microwaves on Changes in Polyphenolic Compounds in Chokeberry (Aronia melanocarpa).

Molecules (Basel, Switzerland) · 2017 · Mixed · Low evidence

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MixedLow evidencePaper 6611

Study snapshot

PublicationMolecules (Basel, Switzerland) · 2017

Study typeother

Reported directionMixed

Evidence ratingLow

Abstract

Chokeberry fruits are highly valued for their high content of polyphenolic compounds. The use of such abiotic stress factors as UV-C radiation, an electromagnetic field, microwave radiation, and ultrasound, at different operation times, caused differentiation in the contents of anthocyanins, phenolic acids, flavonols, and flavan-3-ols. Samples were analyzed for contents of polyphenolics with ultra-performance liquid chromatography and photodiode detector-quadrupole/time-of-flight mass spectrometry (UPLC-PDA-MS/MS). The analysis showed that after exposure to abiotic stress factors, the concentration of anthocyanins ranged from 3587 to 6316 mg/100 g dry matter (dm) that constituted, on average, 67.6% of all identified polyphenolic compounds. The second investigated group included phenolic acids with the contents ranging between 1480 and 2444 mg/100 g dm (26.5%); then flavonols within the range of 133 to 243 mg/100 g dm (3.7%), and finally flavan-3-ols fluctuated between 191 and 369 mg/100 g dm (2.2%). The use of abiotic stress factors such as UV-C radiation, microwaves and ultrasound field, in most cases contributed to an increase in the content of the particular polyphenolic compounds in black chokeberry. Under the influence of these factors, increases were observed: in anthocyanin content, of 22%; in phenolic acids, of 20%; in flavonols, of 43%; and in flavan-3-ols, of 30%. Only the use of the electromagnetic field caused a decrease in the content of the examined polyphenolic compounds.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeother

Effect directionmixed

PopulationChokeberry (Aronia melanocarpa) fruits/samples

Sample sizeNot supplied

Exposuredifferent operation times

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Exposure to abiotic stress factors (UV-C, electromagnetic field, microwave radiation, ultrasound) at different operation times differentiated the contents of several polyphenolic compound groups in chokeberry. UV-C, microwaves, and ultrasound in most cases increased polyphenolic contents (reported increases: anthocyanins 22%, phenolic acids 20%, flavonols 43%, flavan-3-ols 30%), whereas the electromagnetic field exposure decreased the examined polyphenolic compounds.

Outcomes measured

Anthocyanins content
Phenolic acids content
Flavonols content
Flavan-3-ols content
Total/identified polyphenolic compounds profile

Limitations

No electromagnetic field parameters (e.g., frequency, field strength) reported in abstract
No microwave parameters (e.g., frequency, power, SAR) reported in abstract
Sample size and experimental design details not reported in abstract
Results described as 'in most cases' without specifying conditions for increases/decreases

View raw extracted JSON

{
  "study_type": "other",
  "exposure": {
    "band": null,
    "source": "electromagnetic field; microwaves",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "different operation times"
  },
  "population": "Chokeberry (Aronia melanocarpa) fruits/samples",
  "sample_size": null,
  "outcomes": [
    "Anthocyanins content",
    "Phenolic acids content",
    "Flavonols content",
    "Flavan-3-ols content",
    "Total/identified polyphenolic compounds profile"
  ],
  "main_findings": "Exposure to abiotic stress factors (UV-C, electromagnetic field, microwave radiation, ultrasound) at different operation times differentiated the contents of several polyphenolic compound groups in chokeberry. UV-C, microwaves, and ultrasound in most cases increased polyphenolic contents (reported increases: anthocyanins 22%, phenolic acids 20%, flavonols 43%, flavan-3-ols 30%), whereas the electromagnetic field exposure decreased the examined polyphenolic compounds.",
  "effect_direction": "mixed",
  "limitations": [
    "No electromagnetic field parameters (e.g., frequency, field strength) reported in abstract",
    "No microwave parameters (e.g., frequency, power, SAR) reported in abstract",
    "Sample size and experimental design details not reported in abstract",
    "Results described as 'in most cases' without specifying conditions for increases/decreases"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "chokeberry",
    "Aronia melanocarpa",
    "polyphenols",
    "anthocyanins",
    "phenolic acids",
    "flavonols",
    "flavan-3-ols",
    "electromagnetic field",
    "microwaves",
    "UV-C",
    "ultrasound",
    "UPLC-PDA-MS/MS"
  ],
  "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.3390/molecules22071161
PubMed: 28704941

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