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What is the duration in days for BOD test for water analysis at 20 degree c?
It is usually of five days but it may either be 3 days depending upon the the BOD test.
How can you calculate BOD Mathmaticly?
The Biochemical Oxygen Demand (BOD) of a sample is the amount of dissolved oxygen required by aerobic microorganisms to breakdown organic matter in the sample.The test is simple:Measure the Dissolved Oxygen content of the sample (a)Place in a sealed darkened bottleIncubate for 5 days at 20'CMeasure the Dissolved Oxygen content of the incubated sample (b)Generally you're using this test to analyse contaminated water, so you'll want to dilute it first - it may be that aren't enough aerobic microorganisms present to give you a measurable result, in which case you'll need to inoculate the sample with a suitable culture.The BOD of the sample = a - bBOD is expressed in mg O2/L of sample.Extra CreditGenerally you're using this test to analyse contaminated water, so you'll want to dilute it first - it may be that aren't enough aerobic microorganisms present to give you a measurable result, in which case you'll need to inoculate the sample with a suitable culture.The BOD of a diluted innoculated sample = ((a - b) - BOD of inoculated culture) * dilution factor
What is the factors which may affect the BOD experiment?
As BOD5 depends on the growth of microbes the test can be adversely affected by * Temperature * Toxics * Turbidity * Light * Agitation * Species of Microbe * Microbial contamination by a wild population * Nature of the organics present * Skill of the analyst * Data entry errors * Lack of blanks and samples of known strength * Equipment accuracy and maintenance
What are the differences between seeded and unseeded BOD?
When diluted water is added in surface wastewater to take immediate BOD is called unseeded and after 5 days of period wastewater received saturated oxygen from diluted water is called now seeded BOD.
What factors do affect a companys debt levels?
One of the factors that may affect a company's debt level is management. Another factor that may affect debt levels is whether the company is making profits or not.
What are the characteristics of a 2 x 2 experimental design?
A 2 x 2 experimental design involves manipulating 2 factors that you are interested in, with 2 levels of each variable. For example, you may want to see the effects of both level of caffeine (factor 1) and difficulty of test (factor 2) on test performance. Thus, for factor 1 - caffeine level, you may have high amount of caffeine (factor 1 level 1), and low amount of caffeine (factor 1 level 2). For factor 2 - difficulty of test, you may have a difficult test (factor 2 level 1), and an easy test (factor 2 level 2). Then you randomly assign individuals to one of the four conditions in your experiment. In this example case the conditions would be: 1. Low caffeine, difficult test 2. High caffeine, difficult test 3. Low caffeine, easy test 4. High caffeine, easy test Then, to analyze your data, you would conduct a factorial ANOVA using SPSS or by hand if you so desire.
In a pond or lake the limiting factor that may affect the growth of algae is the level dissolved?
Phosphate
When was May Beate Jensen born?
May Beate Jensen was born on February 21, 1965, in Bod, Norway.
Would the hardest of a mineral affect its performance in the streak test?
The hardness of a mineral can influence its performance in the streak test, but it is not the sole determining factor. Harder minerals may scratch the streak plate, preventing a streak from being produced, while softer minerals can leave a streak more easily. However, the mineral's composition and structure also play significant roles in determining its streak color and consistency. Therefore, while hardness can affect the outcome, it is not the only factor at play.
If you missed one cycle and pregnancy test came out negative what can be the cause?
There could be several possibilities.The test could be wrong. Seriously, it happens, get another one (different brand that tests different criteria, preferably). Ultimately, see your doctor and have a proper lab pregnancy test done.Changes in your diet can affect menstruation.Your age and state of body development may have something to do with it.If you are using hormonal birth controls or certain medications, they may affect menstruation.Your weight (too light/too heavy) might be a factor.Stress may also be a factor.
Do antibiotics affect widal test results?
To a certain extent yes.The post antibiotics Widal Test will have Low titers of agglutinins.Hence the test may be reported as False Negative.
What could affect MMPI results?
Factors that could affect MMPI results include the test-taker's honesty in responding, their mental state at the time of the test, their understanding of the questions, and any attempts to manipulate the results. Other factors that could influence results include cultural differences, language barriers, and the presence of psychological disorders or conditions that may impact responses.
