A comparison of conventional and radio frequency defrosting of lean beef meats: Effects on water binding characteristics.

Meat science · 2009 · Mixed · Insufficient evidence

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MixedInsufficient evidencePaper 3324

Study snapshot

PublicationMeat science · 2009

Study typeother

Reported directionMixed

Evidence ratingInsufficient

Abstract

The effect of defrosting rate (slow conventional air vs. fast radio frequency (RF) method) on water holding properties of lean beef meat (whole, minced and comminuted) was investigated using a conventional centrifugation method (drip loss), nuclear magnetic resonance relaxometry (NMR) and dielectric spectroscopy. Tempering by radio frequency (RF) or a conventional air method had no subsequent effect (P⩾0.05) on drip loss. However, thawing by RF resulted in a significant decrease in drip loss (P<0.05) when compared to air thawing. Micronutrient loss (μg/mL of drip) was also greater in air thawed samples (P<0.05). NMR T(2) distributions did not show any marked difference between thawing methods. The dielectric properties of lean beef, measured from 0.01-20GHz at 5°C, were higher following RF thawing. Increased comminution reduced dielectric values, while fine comminution gave an additional fraction in the NMR T(2) distribution. These results provide valuable information on water binding in meat following RF tempering/thawing.

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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

PopulationLean beef meat (whole, minced and comminuted)

Sample sizeNot supplied

ExposureNot supplied

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Tempering by RF or conventional air had no subsequent effect on drip loss (P≥0.05). RF thawing significantly decreased drip loss compared with air thawing (P<0.05), and micronutrient loss in drip was greater in air-thawed samples (P<0.05). NMR T2 distributions showed no marked difference between thawing methods, while dielectric properties measured from 0.01–20 GHz at 5°C were higher following RF thawing.

Outcomes measured

Drip loss (water holding properties)
Micronutrient loss in drip (μg/mL)
NMR relaxometry T2 distributions
Dielectric properties (0.01–20 GHz at 5°C)

Limitations

No sample size reported in abstract
RF exposure parameters (e.g., frequency, power, duration) not specified in abstract

View raw extracted JSON

{
  "study_type": "other",
  "exposure": {
    "band": null,
    "source": "radio frequency defrosting/tempering",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Lean beef meat (whole, minced and comminuted)",
  "sample_size": null,
  "outcomes": [
    "Drip loss (water holding properties)",
    "Micronutrient loss in drip (μg/mL)",
    "NMR relaxometry T2 distributions",
    "Dielectric properties (0.01–20 GHz at 5°C)"
  ],
  "main_findings": "Tempering by RF or conventional air had no subsequent effect on drip loss (P≥0.05). RF thawing significantly decreased drip loss compared with air thawing (P<0.05), and micronutrient loss in drip was greater in air-thawed samples (P<0.05). NMR T2 distributions showed no marked difference between thawing methods, while dielectric properties measured from 0.01–20 GHz at 5°C were higher following RF thawing.",
  "effect_direction": "mixed",
  "limitations": [
    "No sample size reported in abstract",
    "RF exposure parameters (e.g., frequency, power, duration) not specified in abstract"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "radio frequency",
    "RF thawing",
    "defrosting",
    "tempering",
    "lean beef",
    "water holding capacity",
    "drip loss",
    "micronutrient loss",
    "NMR relaxometry",
    "dielectric spectroscopy"
  ],
  "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: 10.1016/j.meatsci.2009.05.010
PubMed: 20416737

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