Soheila Khatami

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The acute toxicity of phenol and ammonia, singly and in combination, to larvae of the ephemeropteran, Baetis rhodani, was examined using a computerized continuous flow system in the laboratory. The 24 h LC50 values (with 95% confidence intervals) were calculated to be 29.9 (17.3-51.5) mg phenol litre(-1) and 8.2 (2.0-33.0) mg un-ionized ammonia litre(-1).(More)
An effective method proposed for detects and removal of impulse noise from digital images. In our method consists of two stages: in first stage we detect noisy pixel based on intensity values. In the second stage we replace noisy pixel with average estimated from noise-free pixels within a small neighborhood. The method adaptively changes the size of the(More)
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