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Buddleja officinalis Maxim, one of the most popular herbal medicines in China, is widely prescribed for curing eye diseases for centuries. In this study, the major components of B. officinalis extract (BOE) and their metabolites in rat urine were detected and identified by ultra‐high‐pressure liquid chromatography coupled with linear ion trap‐orbitrap tandem mass spectrometry (UHPLC‐LTQ‐Orbitrap). A total of 19 compounds, including 8 flavonoids and 11 phenylethanoid glycosides, were confirmed or tentatively identified from BOE. In vivo, 33 components, including 3 prototypes and 30 metabolies, were confirmed or tentatively identified in rat urine samples. The metabolic pathways of different types of compounds were also proposed. This study would effectively narrow the range of potentially bioactive constituents of BOE and shed light to its action mechanism.  相似文献
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鱼粉在储存过程中油脂易受外界环境的影响发生氧化劣变,导致鱼粉的品质下降。通过检测油脂的过氧化值(POV)、酸价(AV)、硫代巴比妥酸值(TBA),获得3种不同产地鱼粉在自然储存条件下油脂品质的变化规律。以期得到有价值的数据,服务于鱼粉的实际储存。研究结果表明:在自然条件下通风、避光储存15个月后,进口鱼粉(秘鲁)、国产鱼粉(玉环)、国产鱼粉(温岭)的AV分别由2.01、1.11、2.43 mg/g升至7.23、6.22、6.79 mg/g。TBA分别由15.5、8.96、7.30 mg/kg升至43.79、34.63、28.34 mg/kg。POV分别上升到16.97、24.64、16.62 mmol/kg后开始下降;研究还证明了脱脂显著降低了鱼粉AV、TBA、POV的含量及其在储存过程中的AV、TBA、POV的生成量,脱脂利于鱼粉的储存。  相似文献
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