S夜色视频在线精品永久,国产欧美第一页,30个交往技巧视频直播,日本未满十八18禁止免费

網站首頁技術中心 > 利用多光譜成像系統(tǒng)區(qū)分杭白菊栽培種和測定木犀草素含量
產品中心

Product center

利用多光譜成像系統(tǒng)區(qū)分杭白菊栽培種和測定木犀草素含量

更新時間:2018-06-12 點擊量:2447

    杭白菊是重要的可食用中藥,因其主要活性成份為木犀草素,其具有自由基清除和抗氧化性能,可改善健康。研究人員利用多光譜成像法進行了杭白菊栽培種區(qū)分和木犀草素含量測定的研究。支持向量機法( (LS-SVM))用來區(qū)分杭白菊栽培種。從樣品獲得的光譜學和形態(tài)學特征數(shù)據(jù)用做前三個主要成份(99.61%), LS-SVM模型在預測集的區(qū)分精度可達98%。另外,偏小二乘法PLS和 LS-SVM 用于預測木犀草素含量,預測結果Rp分別為 0.949和0.965; RMSEP 分別為0.387和0.314 mg g−1。所有結果顯示,將MSI多光譜成像技術與化學計量法結合的方法,可能是一種快速、無損區(qū)分杭白菊栽培種和測定木犀草素含量的有效方法。該文章利用了VideometerLab 多光譜測量系統(tǒng)進行了研究。
   
Chrysanthemum morifolium Ramat. (Chr) is a notable medicinal and edible crop that stimulates health owing to its radical-scavenging and antioxidant properties due to its main active flavonoid luteolin. The performance of discriminating between Chr c*rs and determining luteolin content in Chr using multispectral imaging (MSI) was investigated. A combination of MSI with principal component analysis (PCA) and least squares-support vector machines (LS-SVM) was applied to classify Chr c*rs. PCA derived from the spectral and morphological features data of the samples explained 99.61% for summing up the first three principal components and the LS-SVM model achieved 98% discrimination accuracy in the prediction set. Additionally, partial least squares (PLS) and LS-SVM models were obtained to predict performance for luteolin content determination, with Rp of 0.949 and 0.965, and RMSEP of 0.387 and 0.314 mg g−1, respectively. All results demonstrated that the combination of MSI system with chemometrics methods could be a rapid and non-destructive method to discriminate between Chr c*rs and determine luteolin content in Chr.

 

余江县| 彝良县| 思南县| 无锡市| 鹿泉市| 利川市| 密云县| 徐汇区| 周口市| 阿拉尔市| 吕梁市| 江山市| 五河县| 平度市| 胶南市| 济阳县| 如皋市| 唐海县| 柏乡县| 陕西省| 西畴县| 内黄县| 农安县| 彭阳县| 鱼台县| 平乡县| 南阳市| 贵南县| 吴江市| 衡阳县| 玉门市| 金坛市| 桑植县| 通江县| 长海县| 松滋市| 宜良县| 湘潭县| 梁山县| 奉贤区| 饶阳县|