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Non-destructive analysis of the two subspecies of African elephants, mammoth, hippopotamus, and sperm whale ivories by visible and short-wave near infrared spectroscopy and chemometrics.
Analyst. 2004 Jun; 129(6):559-63.A

Abstract

Visible (VIS) and short-wave near infrared (SW-NIR) spectroscopy was used for non-destructive analysis of ivories. VIS-SW-NIR (500-1000 nm) spectra were measured in situ for five kinds of ivories, that is two subspecies of African elephants, mammoth, hippopotamus, and sperm whale. Chemometrics analyses were carried out for the spectral data from 500 to 1000 nm region. The five kinds of ivories were clearly discriminated from each other on the scores plot of two principal components (PCs) obtained by principal component analysis (PCA). It was noteworthy that the ivories of the two subspecies of African elephants were discriminated by the scores of PC 1. The loadings plot for PC 1 showed that the discrimination relies on the intensity changes in bands due to collagenous proteins and water interacting with proteins. It was found that the scores plot of PC 2 is useful to distinguish between the ivories of the two subspecies of African elephants and the other ivories. We also developed a calibration model that predicted the specific gravity of five kinds of ivories from their VIS-SW-NIR spectral data using partial least squares (PLS)-1 regression. The correlation coefficient and root mean square error of cross validation (RMSECV) of this model were 0.960 and 0.037, respectively.

Authors+Show Affiliations

Forensic Science Laboratory, Hyogo Prefectural Police Headquarters, Shimoyamate-dori, Chuo-ku, Kobe 650-8510, Japan.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15152335

Citation

Shimoyama, Masahiko, et al. "Non-destructive Analysis of the Two Subspecies of African Elephants, Mammoth, Hippopotamus, and Sperm Whale Ivories By Visible and Short-wave Near Infrared Spectroscopy and Chemometrics." The Analyst, vol. 129, no. 6, 2004, pp. 559-63.
Shimoyama M, Morimoto S, Ozaki Y. Non-destructive analysis of the two subspecies of African elephants, mammoth, hippopotamus, and sperm whale ivories by visible and short-wave near infrared spectroscopy and chemometrics. Analyst. 2004;129(6):559-63.
Shimoyama, M., Morimoto, S., & Ozaki, Y. (2004). Non-destructive analysis of the two subspecies of African elephants, mammoth, hippopotamus, and sperm whale ivories by visible and short-wave near infrared spectroscopy and chemometrics. The Analyst, 129(6), 559-63.
Shimoyama M, Morimoto S, Ozaki Y. Non-destructive Analysis of the Two Subspecies of African Elephants, Mammoth, Hippopotamus, and Sperm Whale Ivories By Visible and Short-wave Near Infrared Spectroscopy and Chemometrics. Analyst. 2004;129(6):559-63. PubMed PMID: 15152335.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Non-destructive analysis of the two subspecies of African elephants, mammoth, hippopotamus, and sperm whale ivories by visible and short-wave near infrared spectroscopy and chemometrics. AU - Shimoyama,Masahiko, AU - Morimoto,Susumu, AU - Ozaki,Yukihiro, Y1 - 2004/04/20/ PY - 2004/5/21/pubmed PY - 2004/10/13/medline PY - 2004/5/21/entrez SP - 559 EP - 63 JF - The Analyst JO - Analyst VL - 129 IS - 6 N2 - Visible (VIS) and short-wave near infrared (SW-NIR) spectroscopy was used for non-destructive analysis of ivories. VIS-SW-NIR (500-1000 nm) spectra were measured in situ for five kinds of ivories, that is two subspecies of African elephants, mammoth, hippopotamus, and sperm whale. Chemometrics analyses were carried out for the spectral data from 500 to 1000 nm region. The five kinds of ivories were clearly discriminated from each other on the scores plot of two principal components (PCs) obtained by principal component analysis (PCA). It was noteworthy that the ivories of the two subspecies of African elephants were discriminated by the scores of PC 1. The loadings plot for PC 1 showed that the discrimination relies on the intensity changes in bands due to collagenous proteins and water interacting with proteins. It was found that the scores plot of PC 2 is useful to distinguish between the ivories of the two subspecies of African elephants and the other ivories. We also developed a calibration model that predicted the specific gravity of five kinds of ivories from their VIS-SW-NIR spectral data using partial least squares (PLS)-1 regression. The correlation coefficient and root mean square error of cross validation (RMSECV) of this model were 0.960 and 0.037, respectively. SN - 0003-2654 UR - https://www.unboundmedicine.com/medline/citation/15152335/Non_destructive_analysis_of_the_two_subspecies_of_African_elephants_mammoth_hippopotamus_and_sperm_whale_ivories_by_visible_and_short_wave_near_infrared_spectroscopy_and_chemometrics_ L2 - https://doi.org/10.1039/b401003e DB - PRIME DP - Unbound Medicine ER -
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