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field box
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     Pandora’s Box
     潘多拉的盒子
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     The Human's Box
     人类的盒子
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  field box
Following birth, all pups were cross-fostered onto non-stressed dams and on postnatal day 60 (P60), behaviour in the elevated plus maze and the open field box was tested.
      
A soil contaminated with polycyclic aromatic hydrocarbons, petroleum hydrocarbons and chlorophenols was bioremediated in field box plots.
      
Bioremediation in Field Box Plots of a Soil Contaminated with Wood-Preservatives: A Comparison of Treatment Conditions using Tox
      
The two-opposed portal technique or four-field box technique was used.
      
The animals were placed in center of open field box and crossings of squares, rearings, bar approaches and circling behavior were counted for 5 min.
      
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ObjectiveTo establish a new model for evaluating locomotor and central depressive drugs in NIH, ICR, Kunming (KM) mice.MethodsLocomotor activities in an open field box were observed, and the locomotor tracks within 30 min were recorded and analyzed by a computer imaging analyzer. The indexes used were total distance, the ratio of central time/total time, and the ratio of central distance/total distance. Pentobarbital was used as model drug, and its effects on locomotor properties were analyzed after ip...

ObjectiveTo establish a new model for evaluating locomotor and central depressive drugs in NIH, ICR, Kunming (KM) mice.MethodsLocomotor activities in an open field box were observed, and the locomotor tracks within 30 min were recorded and analyzed by a computer imaging analyzer. The indexes used were total distance, the ratio of central time/total time, and the ratio of central distance/total distance. Pentobarbital was used as model drug, and its effects on locomotor properties were analyzed after ip injection at 7.5, 15 and 30 mg·kg-1. ResultsIn the three strains of mice, the total distance within the first 10 min was longer than those of the second and third 10 min durations (P < 0.01); and the difference of the activities in central region was small but showed some strain and circadian differences. Pentobarbital reduced the total distance in ICR and NIH (not in KM) mice, but showed no remarkable dosedependency. However, pentobarbital reduced the ratios both central time and central distance dosedependently in the three strains of mice. ConclusionThe model established in this study is useful to evaluate the properties of locomotor activity and the effects of central depressive drug. Among these indexes, the ratios for the activities in the central region are more stable and sensitive.

目的 用开场实验研究NIH、ICR、昆明种小鼠自发活动特点,并以戊巴比妥为工具药建立药物中枢抑制作用新的评价模型.方法 用开场实验观察小鼠进入新环境的自发活动特点,并用计算机图像处理系统记录,分析小鼠30min内的活动轨迹,观察不同时间段的总路程、中央逗留时间、中央路程3个参数.还观察了腹腔注射不同剂量戊巴比妥对自发活动特点的影响.结果 各种小鼠总路程在前10min明显大于后20min(P<0.001);中央逗留时间和中央路程变化较小,但存在一定的品系和昼夜差异.戊巴比妥可减少ICR和NIH小鼠(昆明种小鼠无效)的总路程,但无典型的量效关系;但可剂量依赖性减少各种小鼠中央逗留时间和中央路程(P<0.01).结论 本实验建立的方法能反映小鼠自发活动特点,并可用于评价中枢抑制药作用,其中中央逗留时间和中央路程是稳定、敏感的指标.

CH4 emission fluxes from early and late rice fields in Qingyuan suburbs of Guangdong Province during the period of 2003—2004 were analyzed. The experimental site is located in the villages of Longjing and Liwei of northwest of Guangzhou City. A static chamber method is used for the measurement of CH4 emission. Air samples in the field box were analyzed using a gas chromatograph equipped with a flame ionization detector (GC/FID GOW-MAC, series 350) in a laboratory of Qingyuan Meteorological Station. The...

CH4 emission fluxes from early and late rice fields in Qingyuan suburbs of Guangdong Province during the period of 2003—2004 were analyzed. The experimental site is located in the villages of Longjing and Liwei of northwest of Guangzhou City. A static chamber method is used for the measurement of CH4 emission. Air samples in the field box were analyzed using a gas chromatograph equipped with a flame ionization detector (GC/FID GOW-MAC, series 350) in a laboratory of Qingyuan Meteorological Station. The average fluxes of CH4 emission for rice crop acreage during the early and late rice growing seasons were 4.38 and 6.09mg·m-2·h-1 in 2003, 5.17 and 8.3mg·m-2·h-1 in 2004. CH4 emission and the rice yield had some differences for different rice cultivar. Rice variety “Qisijian" has not only higher CH4 emission (higher by 1.08mg·m-2·h-1) but also a lower yield (0.64 times yield) compared with rice variety “Jinyou 99". Therefore, the choice of the rice variety which has less CH4 emission and more yield is a good way to mitigate CH4 emission.

分析了2003、2004年广东省清远市郊区早、晚稻稻田甲烷(CH4)的排放通量,结果表明广东清远早、晚稻稻田CH4排放通量的几何平均值2003年为4.38mg·m-2·h-1和6.09mg·m-2·h-1;2004年为5.17mg·m-2·h-1和8.3mg·m-2·h-1,土壤有机质含量是造成2003和2004年CH4排放差异的原因之一。水稻品种的不同,CH4排放通量也有所不同,实验表明,水稻品种“七丝尖”的排放通量比品种“金优99”高1.08mg·m-2·h-1,产量却只有64%。此外,与相关的测量结果进行初步比较。

 
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