Data table with samples' code, description and areas under the curves of assigned metabolites in CDCl3 exctract of milk by 1H-NMR 600MHz

<b>Description of the “datatable_metabolites.xlsx” file</b>This table contains quantitative metabolite data for a set of milk samples analyzed by NMR-based metabolomics.<b>Structure</b>:<b>Rows</b>: Each row corresponds to an individual milk sample.<b>Columns</b>:<b>Sample metadata</b>:<code>sample_numeric_code</code> — unique numeric identifier for each sample.<code>Sample_type</code> — category/type of milk (e.g., cow, goat, human, infant formula).<code>Brand</code> — commercial brand or label of the product.<code>year_collection</code> — year when the sample was collected.<b>Metabolite concentrations</b>: The remaining columns list quantified metabolites, expressed in arbitrary concentration units derived from NMR integration. Examples include amino acids (e.g., leucine, valine), organic acids (e.g., lactate, citrate), carbohydrates (e.g., lactose, galactose), oligosaccharides (e.g., 2FL, 3FL), and other compounds.<b>Purpose</b>:<br>The dataset is intended for statistical and comparative analyses of milk composition across different sample types, brands, and collection years. It can be used for exploratory data analysis (PCA, clustering), biomarker identification, and nutritional or quality assessments.

<b>“datatable_metabolites.xlsx”文件描述</b>本表格收录了一批经基于核磁共振（NMR）的代谢组学分析的牛奶样本的定量代谢物数据。<b>结构</b>：<b>行</b>：每一行对应一份独立的牛奶样本。<b>列</b>：<b>样本元数据</b>：<code>sample_numeric_code</code> — 每份样本的唯一数字标识符。<code>Sample_type</code> — 牛奶的类别/品类（例如牛乳、山羊乳、人乳、婴儿配方奶粉）。<code>Brand</code> — 产品的商业品牌或标签。<code>year_collection</code> — 样本的采集年份。<b>代谢物浓度</b>：剩余列均为已定量的代谢物，浓度单位为基于NMR积分值衍生的任意单位。涵盖的代谢物类型包括氨基酸（例如亮氨酸、缬氨酸）、有机酸（例如乳酸盐、柠檬酸盐）、碳水化合物（例如乳糖、半乳糖）、寡糖（例如2FL、3FL）及其他化合物。<b>用途</b>：本数据集旨在支持针对不同样本类型、品牌及采集年份的牛奶成分开展统计与比较分析工作，可用于探索性数据分析（主成分分析（Principal Component Analysis, PCA）、聚类分析）、生物标志物识别以及营养或品质评估。