[Objective]The paper aimed to effectively reduce the occurrence of bacterial resistance associated with breeding practices and to mitigate food safety risks by controlling the illegal use of veterinary drugs in self-f...[Objective]The paper aimed to effectively reduce the occurrence of bacterial resistance associated with breeding practices and to mitigate food safety risks by controlling the illegal use of veterinary drugs in self-formulated feed at the source.[Method]A screening database comprising 274 illegally added chemical drugs in self-formulated feed was established utilizing ultra-performance liquid chromatography coupled with quadrupole/electrostatic field orbitrap high-resolution mass spectrometry(HPLC-Q-Exactive Focus/MS).Subsequently,253 batches of self-formulated feed samples from various farms in Hebei Province were screened and quantitatively analyzed.[Result]The screening results indicated the presence of 8 pharmaceutical components across 10 batches of self-formulated feed samples,with a detection rate of 3.2%and concentrations ranging from 0.06 to 28851.8μg/g.[Conclusion]The application of high-resolution mass spectrometry is feasible and highly significant for the risk monitoring of illegally added drugs in self-formulated feed.展开更多
Metaverse concept spreads wildly,giving a glimpse of future tech universe Marc Zuckerberg stated toward the end of 2021 that Facebook will become Meta,and the notion of metaverse spread like wildfire in China.This not...Metaverse concept spreads wildly,giving a glimpse of future tech universe Marc Zuckerberg stated toward the end of 2021 that Facebook will become Meta,and the notion of metaverse spread like wildfire in China.This notion found a strong resonance at Zhangjiajie,the famous picturesque area in Hunan famed for the landscapes in the 3 D film Avatar.展开更多
基金Supported by the Earmarked Fund for Hebei Agriculture Research System(HBCT2024260407)。
文摘[Objective]The paper aimed to effectively reduce the occurrence of bacterial resistance associated with breeding practices and to mitigate food safety risks by controlling the illegal use of veterinary drugs in self-formulated feed at the source.[Method]A screening database comprising 274 illegally added chemical drugs in self-formulated feed was established utilizing ultra-performance liquid chromatography coupled with quadrupole/electrostatic field orbitrap high-resolution mass spectrometry(HPLC-Q-Exactive Focus/MS).Subsequently,253 batches of self-formulated feed samples from various farms in Hebei Province were screened and quantitatively analyzed.[Result]The screening results indicated the presence of 8 pharmaceutical components across 10 batches of self-formulated feed samples,with a detection rate of 3.2%and concentrations ranging from 0.06 to 28851.8μg/g.[Conclusion]The application of high-resolution mass spectrometry is feasible and highly significant for the risk monitoring of illegally added drugs in self-formulated feed.
文摘Metaverse concept spreads wildly,giving a glimpse of future tech universe Marc Zuckerberg stated toward the end of 2021 that Facebook will become Meta,and the notion of metaverse spread like wildfire in China.This notion found a strong resonance at Zhangjiajie,the famous picturesque area in Hunan famed for the landscapes in the 3 D film Avatar.
