کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7588139 | 1492081 | 2016 | 31 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quantitative measurements of binary amino acids mixtures in yellow foxtail millet by terahertz time domain spectroscopy
ترجمه فارسی عنوان
اندازه گیری های کمی از مخلوط آمینواسیدهای دوتایی در ارزن فلفل زرد توسط طیف سنجی دامنه زمان تراخ
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Terahertz time domain spectroscopy (THz-TDS) combined with chemometrics has been utilized for the qualitative and quantitative analysis of binary mixtures of l-glutamic acid and l-glutamine which have similar chemical structures and properties. The binary mixtures of amino acids were prepared with yellow foxtail millet matrix, substituted for polyethylene (PE) as previously reported. After proper pretreatment of absorption spectra, quantitative analysis was achieved by partial least squares (PLS) and interval partial least squares (iPLS) regressions. The performance of models was evaluated based on the root mean square error of prediction (RMSEP) and correlation coefficient (R2) of cross-validations with bootstrapped Latin partitions as criterion. The iPLS yielded better results with low RMSEP (0.39 ± 0.02%, 0.39 ± 0.02%), and higher R2 values (0.9904, 0.9906) for glutamine and glutamic acid comparing to the conventional PLS models. Multivariate curve resolution alternating least squares (MCR-ALS) was successfully applied for resolution of pure THz spectra and concentration profiles of two amino acids components from mixtures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 211, 15 November 2016, Pages 494-501
Journal: Food Chemistry - Volume 211, 15 November 2016, Pages 494-501
نویسندگان
Shaohua Lu, Xin Zhang, Zhuoyong Zhang, Yuping Yang, Yuhong Xiang,