A fast and non-destructive method to discriminate beef samples using TD-NMR.

Santos P. M; Correa C. C; Forato L. A; Tullio R. R; Cruz G. M; Colnago L. A.

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A fast and non-destructive method to discriminate beef samples using TD-NMR.

机译：一种快速，无损的使用TD-NMR鉴别牛肉样品的方法。

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摘要

Carr-Purcell-Meiboom-Gill (CPMG) and Continuous Wave Free Precision (CWFP) pulse sequences were used to obtain time-domain 1H Nuclear Magnetic Resonance (TD-NMR) data of beef samples. A total of 99 beef samples from different bull race (Angus, Bonsmara and Canchim) and sex (heifers and steer) were used in this study. The CPMG and CWFP data sets were processed using univariate and multivariate analysis in order to develop classification models to discriminate the samples according to the animal sex and bull race. A paired Student's t test indicated that the univariate models obtained with CWFP data set (using M _z/M _o) had superior performance than those obtained with CPMG (using T ₂ values). Multivariate models showed similar predictability for both pulse sequences, with an average of correct classification higher than 80% for most of models developed. In general, the results showed that the TD-NMR spectroscopy when combined with univariate and multivariate analysis could provide a valuable tool for tracing the sex and bull race of beef samples, providing a reliable identification in a rapid, relatively cheap and non-invasive way, even in packages

机译：用Carr-Purcell-Meiboom-Gill（CPMG）和连续无波精密度（CWFP）脉冲序列获得牛肉样品的时域 1 H核磁共振（TD-NMR）数据。在这项研究中，总共使用了来自不同公牛种族（安格斯，邦斯马拉和坎奇姆）和性别（小母牛和公牛）的99个牛肉样品。使用单变量和多变量分析处理CPMG和CWFP数据集，以建立分类模型，以根据动物性别和公牛种族区分样本。配对的Student t检验表明，使用CWFP数据集（使用M _{z / M _{o ）获得的单变量模型的性能优于使用CPMG（使用T _{2 个值）。多变量模型对两个脉冲序列都显示出相似的可预测性，大多数开发的模型的正确分类平均值均高于80％。总的来说，结果表明，TD-NMR光谱结合单变量和多变量分析可提供一种有价值的工具来追踪牛肉样品的性别和公牛，以快速，相对便宜且无创的方式提供可靠的鉴定，甚至是包装}}}

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来源
《Food Control》 |2014年第null期|共5页
作者
Santos P. M; Correa C. C; Forato L. A; Tullio R. R; Cruz G. M; Colnago L. A.;
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正文语种 eng
中图分类食品工业;
关键词
Beef; CPMG; CWFP; TD-NMR;

机译：牛肉;CPMG;CWFP;TD-NMR;

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1. A fast and non-destructive method to discriminate beef samples using TD-NMR. [J] . Santos P. M, Correa C. C, Forato L. A, Food Control . 2014,第Null期

机译：一种快速，无损的使用TD-NMR鉴别牛肉样品的方法。
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3. A fast and highly discriminative method to identify individual CTX-M groups in whole blood samples [J] . Stein C., Makarewicz O., Pletz M. W. International journal of medical microbiology: IJMM . 2013,第Null期

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4. ASSESSMENT OF FAST CHILLING METHODS FOR BEEF CARCASS COOLING: CFD APPROACH [C] . Kumsa Kuffi, Thijs Defraeye, Stefaan Lescouhier, IIR International Conference on Sustainability and the Cold Chain . 2013

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5. Development of a non-destructive sample quality assessment method for soft clays. [D] . Landon, Melissa M. 2007

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7. The bacterial identification and antimicrobial susceptibility testing are usually performed manually. Recently, the number of samples has increased and the need for automatification has grown. BioMerieux has investigated Vitek2 for this purpose. HUSLAB has assigned us to compare the identification and antimicrobial results with respect to routine methods and Vitek2. Furthermore, we evaluate test reactions, ESBL (Extended Spectrum Beta-Lactamase) production and the time what it takes to get results with Vitek2. In this study, we examined a total of 183 bacterial isolates including 76 ESBL-strains, 40 nonfermenting rods, 41 fastidious bacteria and 26 fresh clinical isolates. The results of routine methods were gathered from the patient database and following this, compared to the results given by Vitek2. Vitek2 correctly identified more than 96 f the ESBL-strains and fresh clinical isolates. The results of nonfermenting rods and fastidious bacteri a were 70 oncordant with those of the routine methods. Test reaction results of Api20E were 94 nd Api20NE 70 n concordance with Vitek2 results. Approximately 80 f all Vitek2 antimicrobial results and 90 f ESBL test results were correct. Compared to earlier studies, Vitek2 performed the tests faster than the routine methods. These results suggest that Vitek2 is capable of giving rapid and accurate results. However, nonfermenting rods and fastidious bacteria should be studied further. [O] . Järveläinen Marika, Roslund Iira, Silander Maarit 2006

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8. Method to Correlate CFD Discriminator Level and Energy Deposition by Neutrons and Photon in a Fast Plastic Scintillating Detector [R] . Pozzi, S. A. 2000

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A fast and non-destructive method to discriminate beef samples using TD-NMR.

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