对14名青年进行了普通的CNV实验和无运动CNV实验。发现了一种与心理负荷解脱伴随出现的脑电波——解脱波EML。EML波不同于普通CNV后形成的Ⅴ波,不含诱发电位外源性成分和运动成分,代表心理负荷的解脱,纯属一种只与心理活动相关的脑电波...对14名青年进行了普通的CNV实验和无运动CNV实验。发现了一种与心理负荷解脱伴随出现的脑电波——解脱波EML。EML波不同于普通CNV后形成的Ⅴ波,不含诱发电位外源性成分和运动成分,代表心理负荷的解脱,纯属一种只与心理活动相关的脑电波。目前尚无理由将EML波视为LPC(LatePositive ComPlex)的一员。提出CNV心理因素的性质,可能是在完成同种任务时由期待、意动、动机、朝向和觉醒等多种心理因素综合构成的心理负荷加重。本工作采取了离线式排除伪迹程序,在数据处理上做出了总平均图(Grand Average Records)。展开更多
Objective Early researches found that different heartbeat perceivers have different heartbeat evoked potential （HEP）waves.Two tasks were considered in our experiments to get more details about the differences betwee...Objective Early researches found that different heartbeat perceivers have different heartbeat evoked potential （HEP）waves.Two tasks were considered in our experiments to get more details about the differences between good and poor heartbeat perceivers at attention and resting state.Methods Thirty channels of electroencephalogram（EEG）were recorded in 22 subjects,who had been subdivided into good and poor heartbeat perceivers by mental tracking task. Principal component analysis（PCA）was applied to remove cardiac field artifact（CFA）from the HEP.Results（1）The good heart-beat perceivers showed difference between attention and resting state in the windows from 250 ms to 450 ms after R wave at C3 location and from 100 ms to 300 ms after R wave at C4 location;（2）The difference waveforms between good and poor heartbeat perceivers was a positive waveform at FZ from 220 ms to 340 ms after R wave,which was more significant in attention state.Conclusion Attention state had more effect on the HEPs of good heartbeat perceivers than that of poor heartbeat perceivers;and perception ability influenced HEPs more strongly in the attention state than in the resting state.展开更多
The ability of triadimefon （TDM）, a triazolic fungicide, to alter the biochemical constituents and thereby minimizing the days required for sprouting in white yam （Dioscorea rotundata Poir.） tubers during storage ...The ability of triadimefon （TDM）, a triazolic fungicide, to alter the biochemical constituents and thereby minimizing the days required for sprouting in white yam （Dioscorea rotundata Poir.） tubers during storage under （30±2） ℃ in the dark, was studied. TDM at 20 mg/L was given to tubers by dipping the tubers in treatment solution containing 20 mg/L TDM on 10, 25 and 40 d after storage （DAS）. Starch, sugars, protein, amino acid contents as well as protease and a-amylase activities were estimated on 15, 30 and 45 DAS from two physiological regions viz., apical and basal regions of the tubers. In normal conditions （control） sprouting occurred on 70 to 80 DAS. The starch content decreased, while protein, amino acid, sugar contents and protease and a-amylase activities were increased due to TDM treatment and led to early sprouting.展开更多
文摘对14名青年进行了普通的CNV实验和无运动CNV实验。发现了一种与心理负荷解脱伴随出现的脑电波——解脱波EML。EML波不同于普通CNV后形成的Ⅴ波,不含诱发电位外源性成分和运动成分,代表心理负荷的解脱,纯属一种只与心理活动相关的脑电波。目前尚无理由将EML波视为LPC(LatePositive ComPlex)的一员。提出CNV心理因素的性质,可能是在完成同种任务时由期待、意动、动机、朝向和觉醒等多种心理因素综合构成的心理负荷加重。本工作采取了离线式排除伪迹程序,在数据处理上做出了总平均图(Grand Average Records)。
基金the National Natural Science Foundation of China（No.30400105）；the National Basic Research Development Program（973）（No. 2003CB716106）；the National Science Fund for Distinguished Young Scholars of China（No.30525030）.
文摘Objective Early researches found that different heartbeat perceivers have different heartbeat evoked potential （HEP）waves.Two tasks were considered in our experiments to get more details about the differences between good and poor heartbeat perceivers at attention and resting state.Methods Thirty channels of electroencephalogram（EEG）were recorded in 22 subjects,who had been subdivided into good and poor heartbeat perceivers by mental tracking task. Principal component analysis（PCA）was applied to remove cardiac field artifact（CFA）from the HEP.Results（1）The good heart-beat perceivers showed difference between attention and resting state in the windows from 250 ms to 450 ms after R wave at C3 location and from 100 ms to 300 ms after R wave at C4 location;（2）The difference waveforms between good and poor heartbeat perceivers was a positive waveform at FZ from 220 ms to 340 ms after R wave,which was more significant in attention state.Conclusion Attention state had more effect on the HEPs of good heartbeat perceivers than that of poor heartbeat perceivers;and perception ability influenced HEPs more strongly in the attention state than in the resting state.
文摘The ability of triadimefon （TDM）, a triazolic fungicide, to alter the biochemical constituents and thereby minimizing the days required for sprouting in white yam （Dioscorea rotundata Poir.） tubers during storage under （30±2） ℃ in the dark, was studied. TDM at 20 mg/L was given to tubers by dipping the tubers in treatment solution containing 20 mg/L TDM on 10, 25 and 40 d after storage （DAS）. Starch, sugars, protein, amino acid contents as well as protease and a-amylase activities were estimated on 15, 30 and 45 DAS from two physiological regions viz., apical and basal regions of the tubers. In normal conditions （control） sprouting occurred on 70 to 80 DAS. The starch content decreased, while protein, amino acid, sugar contents and protease and a-amylase activities were increased due to TDM treatment and led to early sprouting.
