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The overcurrent fault of copper wire is an important cause of electrical fire, and the combustion process of which is relatively complicated. In this study, the rated current of 32A of the wire was taken, and the electrical fault simulation device was used. After the overcurrent Io was set to 128A, 160A, 192A, and 224A, respectively, to analyze the combustion evolution process of PVC‐insulated copper...
Three new flavonoids, 4′‐O‐β‐D‐glucopyranosyl‐2S,3R‐3,7‐dihydroxy‐3′‐methoxyflavan (1), (3R)‐7,4′‐dihydroxy‐5,3′‐methoxychalcone (2), (3S)‐7,2′,3′‐trihydroxy‐6,4′‐dimethoxylisoflavan (3), and one new natural occurring product, (3S)‐6,2′,3′‐trihydroxy‐7,4′‐dimethoxylisoflavan (4), together with eleven known ones (5–15), were isolated from the roots of Indigofera stachyodes. The structures of these...
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