[1H NMR analysis of rice wine treated by electric field].

Guang pu xue yu guang pu fen xi = Guang pu · 2004 · Unclear · Insufficient evidence

← Research stream

UnclearInsufficient evidencePaper 3673

Study snapshot

PublicationGuang pu xue yu guang pu fen xi = Guang pu · 2004

Study typeother

Reported directionUnclear

Evidence ratingInsufficient

Abstract

This paper studied the 1H NMR spectrum change of Guangdong rice wine. Three kinds of rice wine were studied: raw wine, finished product wine and electric-field-treated wine (40 kV x m(-1), 50 Hz, 180 min). Results showed that many weak peaks appeared in raw wine's CH3- and -CH2- peaks in contrast to the other two samples, reflecting that single molecules and various kinds of hydrogen-bonded clusters coexisted in the raw wine, and many kinds of organic compounds also contributed to forming peaks. As to the peaks of hydroxide H, the peak forms of the three samples were level, single sharp and irregular, respectively (raw, finished product and electric-field-treated wine). The level peak of raw wine inferved that there were two kinds of hydroxide H existed, one was involved in forming hydrogen bonds, while the other was not. The single sharp peak of finished product wine showed that single stable large hydrogen-bonded clusters were formed in the wine, and the irregular peak of electric-field-treated wine illustrated that there might exist various kinds of hydrogen-bonded clusters, whose main structure was similar to that of the finished product wine.

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 directionunclear

PopulationNot supplied

Sample sizeNot supplied

ExposureELF · 0.05 MHz · 180 min

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Three rice wine samples (raw, finished product, and electric-field-treated at 40 kV·m(-1), 50 Hz for 180 min) showed different 1H NMR peak patterns. Raw wine showed many weak peaks in CH3 and -CH2- regions compared with the other two samples, and hydroxide H peaks differed across samples (level in raw, single sharp in finished product, irregular in electric-field-treated). The irregular hydroxide H peak in electric-field-treated wine was interpreted as suggesting various hydrogen-bonded clusters with a main structure similar to finished product wine.

Outcomes measured

1H NMR spectrum changes
CH3 and -CH2- peak patterns
hydroxide H peak form (hydrogen-bonded cluster structure inference)

Limitations

No sample size reported in abstract
Non-biological/food chemistry outcome; no health endpoints
Exposure details limited to field strength, frequency, and duration; no dosimetry beyond this

View raw extracted JSON

{
  "study_type": "other",
  "exposure": {
    "band": "ELF",
    "source": "other",
    "frequency_mhz": 0.05,
    "sar_wkg": null,
    "duration": "180 min"
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "1H NMR spectrum changes",
    "CH3 and -CH2- peak patterns",
    "hydroxide H peak form (hydrogen-bonded cluster structure inference)"
  ],
  "main_findings": "Three rice wine samples (raw, finished product, and electric-field-treated at 40 kV·m(-1), 50 Hz for 180 min) showed different 1H NMR peak patterns. Raw wine showed many weak peaks in CH3 and -CH2- regions compared with the other two samples, and hydroxide H peaks differed across samples (level in raw, single sharp in finished product, irregular in electric-field-treated). The irregular hydroxide H peak in electric-field-treated wine was interpreted as suggesting various hydrogen-bonded clusters with a main structure similar to finished product wine.",
  "effect_direction": "unclear",
  "limitations": [
    "No sample size reported in abstract",
    "Non-biological/food chemistry outcome; no health endpoints",
    "Exposure details limited to field strength, frequency, and duration; no dosimetry beyond this"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electric field treatment",
    "ELF",
    "50 Hz",
    "40 kV/m",
    "rice wine",
    "1H NMR",
    "hydrogen bonding",
    "clusters"
  ],
  "suggested_hubs": []
}

AI can be wrong. Always verify against the paper.

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: Not supplied
PubMed: 15766200

Read the original paper →

Related papers

← Back to the Research Library