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151.
The purpose of this study was to evaluate the electrocardiographic effects of single intravenous dose of ciprofloxacin in
dogs. Ten adult cross-breed dogs of both sexes were selected as the sample population. Baseline electrocardiographic values
were recorded just before drug administration. Then the dogs received intravenous infusion of ciprofloxacin (10 mg/kg) over
the fifteen minutes. The ECGs recorded at 15, 30, 60 and 120 minutes after ciprofloxacin administration. The ECG measurements
of heart rate, PR interval, QRS interval, ST segment, T-wave amplitude and QT interval were taken from lead II. There was
a small but significant increase in the longest QT intervals over baseline at T60 (P = 0.041). The mean PR intervals, QTc intervals, JT intervals, ST segment, T-wave amplitude did not differ significantly
before and after ciprofloxacin except for JT intervals at T60 (P = 0.041). At this measurement point, there was an increased QT interval value of 0.02 second or 9.51 % in comparison to the baseline. In Conclusions, Only minor
QT intervals changes were observed after ciprofloxacin injection. Despite the occurrence of ECG changes following intravenous
ciprofloxacin administration neither dangerous rhythm disturbances nor serious ECG changes were seen in this study. 相似文献
152.
Simulation of 1D surface and 2D subsurface water flow and nitrate transport in alternate and conventional furrow fertigation 总被引:3,自引:0,他引:3
Hamed Ebrahimian Abdolmajid Liaghat Masoud Parsinejad Enrique Playán Fariborz Abbasi Maryam Navabian 《Irrigation Science》2013,31(3):301-316
Increasing water and fertilizer productivity stands as a relevant challenge for sustainable agriculture. Alternate furrow irrigation and surface fertigation have long been identified as water and fertilizer conserving techniques in agricultural lands. The objective of this study was to simulate water flow and fertilizer transport in the soil surface and in the soil profile for variable and fixed alternate furrow fertigation and for conventional furrow fertigation. An experimental data set was used to calibrate and validate two simulation models: a 1D surface fertigation model and the 2D subsurface water and solute transfer model HYDRUS-2D. Both models were combined to simulate the fertigation process in furrow irrigation. The surface fertigation model could successfully simulate runoff discharge and nitrate concentration for all irrigation treatments. Six soil hydraulic and solute transport parameters were inversely estimated using the Levenberg–Marquardt optimization technique. The outcome of this process calibrated HYDRUS-2D to the observed field data. HYDRUS-2D was run in validation mode, simulating water content and nitrate concentration in the soil profiles of the wet furrows, ridges and dry furrows at the upstream, middle and downstream parts of the experimental field. This model produced adequate agreement between measured and predicted soil water content and nitrate concentration. The combined model stands as a valuable tool to better design and manage fertigation in alternate and conventional furrow irrigation. 相似文献
153.