Atomic magnetometers operated in the spin-exchange relaxation-free(SERF)regime are the promising sensor to replace superconducting quantum interference devices(SQUIDs)in the biomagnetism field.The SERF magnetometer wi...Atomic magnetometers operated in the spin-exchange relaxation-free(SERF)regime are the promising sensor to replace superconducting quantum interference devices(SQUIDs)in the biomagnetism field.The SERF magnetometer with compact size and good performance is crucial to the new generation of wearable magnetoencephalography(MEG)system.In this paper,we developed a compact and closed-loop SERF magnetometer with the dimensions of 15.0×22.0×30.0 mm^(3)based on a single-beam configuration.The bandwidth of the magnetometer was extended to 675 Hz while the sensitivity was maintained at 22 f T/Hz^(1/2).A nearly 3-fold enhancement of the bandwidth was obtained in comparison with the open-loop control.The implementation of the closed-loop control also greatly improved the dynamic range,enabling the magnetometer to be robust against the disturbance of the ambient field.Moreover,the magnetometer was successfully applied for the detection of humanα-rhythm and auditory evoked fields(AEFs),which demonstrated the potential to be extended to multi-channel MEG measurements for future neuroscience studies.展开更多
[目的]将针对大豆菌核病的防治,筛选对其有显著性效果的药剂。[方法]采用菌丝生长速率法,测定丙环唑等20种杀菌剂对大豆菌核病的室内生物活性,进行药剂复配筛选和田间防效试验。[结果]通过室内生物活性测定筛选,啶菌唑、异菌脲、丙环唑...[目的]将针对大豆菌核病的防治,筛选对其有显著性效果的药剂。[方法]采用菌丝生长速率法,测定丙环唑等20种杀菌剂对大豆菌核病的室内生物活性,进行药剂复配筛选和田间防效试验。[结果]通过室内生物活性测定筛选,啶菌唑、异菌脲、丙环唑、菌核净、咯菌腈5种杀菌剂对大豆菌核病有良好的抑菌效果,EC50值分别为0.031、0.026、0.036、0.029、0.038 mg/L。异菌脲与啶菌唑(5∶1)和丙环唑与啶菌唑(1∶5)复配,EC50值分别为0.0147、0.0204 mg/L,增效系数分别为1.768和1.664,具有较好的增效作用。田间试验处理表明:异菌脲+啶菌唑(420+85 g a.i./hm^(2))与丙环唑+啶菌唑(60+300 g a.i./hm^(2))对大豆菌核病的防治效果分别达86.26%和85.01%。[结论]异菌脲与啶菌唑(5∶1)和丙环唑与啶菌唑(1∶5)二元混配,可以有效防治大豆菌核病。展开更多
基金Project supported by Ji Hua Laboratory(Grant No.X190131TD190)the Research and Development Project for Equipment of Chinese Academy of Sciences(Grant No.YJKYYQ20210051)+1 种基金the Suzhou pilot project of basic research(Grant No.SJC2021024)the Natural Science Foundation of Jiangsu Province,China(Grant No.BK20200215)。
文摘Atomic magnetometers operated in the spin-exchange relaxation-free(SERF)regime are the promising sensor to replace superconducting quantum interference devices(SQUIDs)in the biomagnetism field.The SERF magnetometer with compact size and good performance is crucial to the new generation of wearable magnetoencephalography(MEG)system.In this paper,we developed a compact and closed-loop SERF magnetometer with the dimensions of 15.0×22.0×30.0 mm^(3)based on a single-beam configuration.The bandwidth of the magnetometer was extended to 675 Hz while the sensitivity was maintained at 22 f T/Hz^(1/2).A nearly 3-fold enhancement of the bandwidth was obtained in comparison with the open-loop control.The implementation of the closed-loop control also greatly improved the dynamic range,enabling the magnetometer to be robust against the disturbance of the ambient field.Moreover,the magnetometer was successfully applied for the detection of humanα-rhythm and auditory evoked fields(AEFs),which demonstrated the potential to be extended to multi-channel MEG measurements for future neuroscience studies.
文摘[目的]将针对大豆菌核病的防治,筛选对其有显著性效果的药剂。[方法]采用菌丝生长速率法,测定丙环唑等20种杀菌剂对大豆菌核病的室内生物活性,进行药剂复配筛选和田间防效试验。[结果]通过室内生物活性测定筛选,啶菌唑、异菌脲、丙环唑、菌核净、咯菌腈5种杀菌剂对大豆菌核病有良好的抑菌效果,EC50值分别为0.031、0.026、0.036、0.029、0.038 mg/L。异菌脲与啶菌唑(5∶1)和丙环唑与啶菌唑(1∶5)复配,EC50值分别为0.0147、0.0204 mg/L,增效系数分别为1.768和1.664,具有较好的增效作用。田间试验处理表明:异菌脲+啶菌唑(420+85 g a.i./hm^(2))与丙环唑+啶菌唑(60+300 g a.i./hm^(2))对大豆菌核病的防治效果分别达86.26%和85.01%。[结论]异菌脲与啶菌唑(5∶1)和丙环唑与啶菌唑(1∶5)二元混配,可以有效防治大豆菌核病。
