The application of pesticides (mostly insecticides and fungicides) during the tea-planting process will undoubtedly increase the dietary risk associated with drinking tea. Thus, it is necessary to ascertain whether pe...The application of pesticides (mostly insecticides and fungicides) during the tea-planting process will undoubtedly increase the dietary risk associated with drinking tea. Thus, it is necessary to ascertain whether pesticide residues in tea products exceed the maximum residue limits. However, the complex matrices present in tea samples comprise a major challenge in the analytical detection of pesticide residues. In this study, nine types of lateral flow immunochromatographic strips (LFICSs) were developed to detect the pesticides of interest (fenpropathrin, chlorpyrifos, imidacloprid, thiamethoxam, acetamiprid, carbendazim, chlorothalonil, pyraclostrobin, and iprodione). To reduce the interference of tea substrates on the assay sensitivity, the pretreatment conditions for tea samples, including the extraction solvent, extraction time, and purification agent, were optimized for the simultaneous detection of these pesticides. The entire testing procedure (including pretreatment and detection) could be completed within 30 min. The detected results of authentic tea samples were confirmed by ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS), which suggest that the LFICS coupled with sample rapid pretreatment can be used for on-site rapid screening of the target pesticide in tea products prior to their market release.展开更多
Previous studies have confirmed that acupuncture for irritable bowel syndrome(IBS)provided an additional benefit over usual care alone.Therefore,we performed a multicenter,randomized,sham-controlled trial to assess th...Previous studies have confirmed that acupuncture for irritable bowel syndrome(IBS)provided an additional benefit over usual care alone.Therefore,we performed a multicenter,randomized,sham-controlled trial to assess the efficacy and safety of acupuncture versus sham acupuncture for refractory IBS in patients in the context of conventional treatments.Patients in the acupuncture and sham acupuncture groups received real or sham acupuncture treatment in 3 sessions per week for a total of 12 sessions.The primary outcome was a change in the IBS–Symptom Severity Scale(IBS-SSS)score from baseline to week 4.A total of 521 participants were screened,and 170 patients(85 patients per group)were enrolled and included in the intention-to-treat analysis.Baseline characteristics were comparable across the two groups.From baseline to 4 weeks,the IBS-SSS total score decreased by 140.0(95%CI:126.0 to 153.9)in the acupuncture group and 64.4(95%CI:50.4 to 78.3)in the sham acupuncture group.The between-group difference was 75.6(95%CI:55.8 to 95.4).Acupuncture efficacy was maintained during the 4-week follow-up period.There were no serious adverse events.In conclusion,acupuncture provided benefits when combined with treatment as usual,providing more options for the treatment of refractory IBS.展开更多
基金supported by grants from Shanghai Agriculture Applied Technology Development Program,China(Grant No.:2020-02-08-00-08-F01456)the Key Research and Development Program of Zhejiang Province,China(Grant No.:2020C02024-2).
文摘The application of pesticides (mostly insecticides and fungicides) during the tea-planting process will undoubtedly increase the dietary risk associated with drinking tea. Thus, it is necessary to ascertain whether pesticide residues in tea products exceed the maximum residue limits. However, the complex matrices present in tea samples comprise a major challenge in the analytical detection of pesticide residues. In this study, nine types of lateral flow immunochromatographic strips (LFICSs) were developed to detect the pesticides of interest (fenpropathrin, chlorpyrifos, imidacloprid, thiamethoxam, acetamiprid, carbendazim, chlorothalonil, pyraclostrobin, and iprodione). To reduce the interference of tea substrates on the assay sensitivity, the pretreatment conditions for tea samples, including the extraction solvent, extraction time, and purification agent, were optimized for the simultaneous detection of these pesticides. The entire testing procedure (including pretreatment and detection) could be completed within 30 min. The detected results of authentic tea samples were confirmed by ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS), which suggest that the LFICS coupled with sample rapid pretreatment can be used for on-site rapid screening of the target pesticide in tea products prior to their market release.
基金supported by the National Key R&D Program of China(No.2019YFC1709004).
文摘Previous studies have confirmed that acupuncture for irritable bowel syndrome(IBS)provided an additional benefit over usual care alone.Therefore,we performed a multicenter,randomized,sham-controlled trial to assess the efficacy and safety of acupuncture versus sham acupuncture for refractory IBS in patients in the context of conventional treatments.Patients in the acupuncture and sham acupuncture groups received real or sham acupuncture treatment in 3 sessions per week for a total of 12 sessions.The primary outcome was a change in the IBS–Symptom Severity Scale(IBS-SSS)score from baseline to week 4.A total of 521 participants were screened,and 170 patients(85 patients per group)were enrolled and included in the intention-to-treat analysis.Baseline characteristics were comparable across the two groups.From baseline to 4 weeks,the IBS-SSS total score decreased by 140.0(95%CI:126.0 to 153.9)in the acupuncture group and 64.4(95%CI:50.4 to 78.3)in the sham acupuncture group.The between-group difference was 75.6(95%CI:55.8 to 95.4).Acupuncture efficacy was maintained during the 4-week follow-up period.There were no serious adverse events.In conclusion,acupuncture provided benefits when combined with treatment as usual,providing more options for the treatment of refractory IBS.
