The relationship between the degree of response of the organism and the quantity of the chemical always assumes a classic concentration-response form. the graphs represent the results of the tests in which groups of the organisms of the same species were exposed to various concentrations of a chemical for a specific length of time.
15 years old
you can use analyze <regression <probit
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LD50 or LC50 refers to the dose of a substance that is lethal to 50% of the test population. For phosphoric acid, the LD50 (oral, rat) is estimated to be around 1530 mg/kg. LC50 (inhalation, rat) is not readily available. As with any substance, caution should be taken when handling phosphoric acid due to its potential toxicity.
To obtain LC50 and LC90 values using probit analysis in SPSS, first, organize your data with the dose levels and the corresponding binary response (e.g., dead/alive) for each treatment group. Next, navigate to "Analyze" > "Regression" > "Probit" in SPSS, and input your variables accordingly. After running the analysis, check the output for the probit model coefficients, which can be used to calculate the LC50 and LC90 values by determining the doses corresponding to the 50% and 90% mortality probabilities, respectively. You can also use the "Probit" or "Logit" option under "Analyze" to directly estimate these lethal concentrations based on your data.
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Lead is a cumulative poison, meaning it builds up in your system. The more often you have contact with it, the more precautions you should take. If you handle it often, it's important that you obtain and use good protection. As always, when in doubt, exercise increased caution. My greatest concern is human well being!
A procedure, particularly a surgical procedure or military procedure.
s a procedure
diagnostic procedure discovers whats wrong, and therapeutic procedure treats whats wrong
diagnostic procedure discovers whats wrong, and therapeutic procedure treats whats wrong