首页> 外文期刊>Journal of the Institute of Brewing >Near Infrared Transmission Spectra of Barley of Malting Grade Represent a Physical-Chemical Fingerprint of the Sample That Is Able to Predict Germinative Vigour in a Multivariate Data Evaluation Model
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Near Infrared Transmission Spectra of Barley of Malting Grade Represent a Physical-Chemical Fingerprint of the Sample That Is Able to Predict Germinative Vigour in a Multivariate Data Evaluation Model

机译:大麦制麦等级的近红外透射光谱代表能够在多变量数据评估模型中预测萌发活力的样品物理化学指纹图谱。

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The physiological and physical-chemical basis of barley germination was studied. Vigour was defined as germination percentage after 24 h and viability as that of 72 h. The barley samples were analysed under germination capacity and energy conditions after harvest and after long time cold storage at 7℃ three-six years. These parameters were each correlated by Partial Least Squares Regression (PLSR) to two separate multivariate data sets: a set of ten physical-chemical parameters and to Near Infrared Transmission (NIT) spectra (850-1050 nm). Surprisingly high correlation coefficients for each of these two data sets were obtained especially with vigour, extract (%) and β-glucan in wort (mg/L) when outliers with viability below 92% were removed. Hard, slowly germinating seeds were more resistant to decay in vigour and viability storage than soft seeds. This change could be predicted by PLSR correlations to the two physical-chemical multivariate methods. Vigour was a more sensitive indicator for the ability to store than viability. The steep criterion was also found to have a physical-chemical basis. The results indicate that NIT calibrations can be used to predict vigour in malting grade barley.
机译:研究了大麦萌发的生理和物理化学基础。活力定义为24小时后的发芽率,活力定义为72小时。在收获后和在7℃下长期冷藏三到六年后,在发芽能力和能量条件下分析大麦样品。这些参数分别通过偏最小二乘回归(PLSR)与两个独立的多元数据集相关:一组十个物理化学参数和近红外透射(NIT)光谱(850-1050 nm)。当去除了活力低于92%的离群值时,尤其是对于麦芽汁中的活力,提取物(%)和麦芽汁中的β-葡聚糖(mg / L),获得了这两个数据集中每个数据集的惊人相关系数。硬的,缓慢发芽的种子比软的种子更能抵抗活力和生存能力的衰退。可以通过与两种物理化学多元方法的PLSR相关性来预测此变化。活力是存储能力比活力更敏感的指标。陡峭的标准也被发现具有物理化学基础。结果表明,NIT校准可用于预测制麦大麦的活力。

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