Abstract
Near infrared spectroscopy (NIRS) and artificial neural networks were used for the quantitative prediction of four active constituents in rhubarb: anthraquinones, anthraquinone glucosides, stilbene glucosides, Tannins and related compounds. The near infrared spectra of the samples were acquired in 1100-2500 nm from powdered rhubarb samples. Four calibration models using radial basis function neural networks (RBFNN) were set up to correlate the spectra with the values determined by HPLC. RMSECVs of the models for the constituents studied were 2.572, 0.442, 2.794 and 9.438, respectively. RMSEPs for the were 4.598, 8.657, 0.4586, and 5.106, respectively. The method is fast, and satisfactory results were obtained. The proposed method can be used for determining the active constituents in Chinese herbal medicine.
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The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
The model cross-validation error for anthraquinones was 2.572.
- Taxon
- rhubarb
Rheum rhabarbarume0 - Outcome
- RMSECVse1
- Value
- 2.572e1
- Qualifier
- anthraquinonese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four active constituents in rhubarb: anthraquinones, anthraquinone glucosides, stilbene glucosides, Tannins and related compounds”
e1“RMSECVs of the models for the constituents studied were 2.572, 0.442, 2.794 and 9.438, respectively”
Claim · model-written summary
The model cross-validation error for anthraquinone glucosides was 0.442.
- Taxon
- rhubarbRheum rhabarbarume0
- Outcome
- RMSECVse1
- Value
- 0.442e1
- Qualifier
- anthraquinone glucosidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four active constituents in rhubarb: anthraquinones, anthraquinone glucosides, stilbene glucosides, Tannins and related compounds”
e1“RMSECVs of the models for the constituents studied were 2.572, 0.442, 2.794 and 9.438, respectively”
Claim · model-written summary
The model cross-validation error for stilbene glucosides was 2.794.
- Taxon
- rhubarbRheum rhabarbarume0
- Outcome
- RMSECVse1
- Value
- 2.794e1
- Qualifier
- stilbene glucosidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four active constituents in rhubarb: anthraquinones, anthraquinone glucosides, stilbene glucosides, Tannins and related compounds”
e1“RMSECVs of the models for the constituents studied were 2.572, 0.442, 2.794 and 9.438, respectively”
Claim · model-written summary
The model cross-validation error for tannins and related compounds was 9.438.
- Taxon
- rhubarbRheum rhabarbarume0
- Outcome
- RMSECVse1
- Value
- 9.438e1
- Qualifier
- Tannins and related compoundse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four active constituents in rhubarb: anthraquinones, anthraquinone glucosides, stilbene glucosides, Tannins and related compounds”
e1“RMSECVs of the models for the constituents studied were 2.572, 0.442, 2.794 and 9.438, respectively”
Claim · model-written summary
The four reported prediction errors were 4.598, 8.657, 0.4586 and 5.106, but the abstract garbles their constituent mapping.
- Taxon
- rhubarbRheum rhabarbarume0
- Outcome
- RMSEPse1
- Value
- 4.598, 8.657, 0.4586, and 5.106e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Schema note from the model: Constituent mapping is unclear due to missing words.
Verbatim
e0“Near infrared spectroscopy (NIRS) and artificial neural networks were used for the quantitative prediction of four active constituents in rhubarb”
e1“RMSEPs for the were 4.598, 8.657, 0.4586, and 5.106, respectively”
Claim · model-written summary
The authors report that the method was fast and gave satisfactory results.
- Taxon
- rhubarbRheum rhabarbarume0
- Outcome
- fast, and satisfactory resultse1
- Value
- satisfactory resultse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four active constituents in rhubarb”
e1“The method is fast, and satisfactory results were obtained”