Hydrochlorimetry Lab

We then took tests to tell if the water had eutrophication problems. Of all our phosphate tests we took it averaged out to 0.1ppm (parts per million) which is really outstanding. We then took nitrate tests and they averaged out 0.9ppm which is good. The last tests we took were dissolved oxygen tests and they came out 9.8ppm which shows how much oxygen is in the water and that is very great. So all of our eutrophication tests we took came back positive showing the the Conodoguinet creek is very

Daptomycin caused a reduction in cell viability of 3 log 10 CFU/mL after 6 h in PBS while tetracycline caused only bacteriostasis. TBHQ had no effect on bacterial viability for the first 120 min of the experiment, but killing was observed thereafter. The bacterial killing was initiated after the conversion of TBHQ into TBBQ and the extent of kill was increased with increasing TBBQ concentration, ultimately leading to a 4 log 10 drop in cell number after 6h. TBBQ was rapidly and extensively bactericidal, causing 5 log10 drop in cell number within 3 h. Kim et al. , [212] determined the bactericidal effect of DMBQ by the time-kill curve experiment.

However, during his workout he was slightly dehydrated since his urine turned to dark yellow. The urine color and specific gravity are matched in terms of normal values based on the data results. Because the normal specific gravity of urine ranges from 1.000-1.030 according to medlineplus.gov. 2. Based on the urine color and specific gravity, what might Tracey conclude about the hydration status of Max 's body at the three different times? Answer: Since

1 “substrate” and another “ enzyme.” Instead of using the distilled water, this time you are going to use different pH buffer in the enzyme test tube. In the substrate tube, add 7 mL of distilled water, 0.3 mL of hydrogen peroxide, and 0.2 mL of guaiacol for a total volume of 7.5 mL. For the enzyme tube, instead of distilled water add the pH solution (3) and 1.5 mL of peroxidase which equals a total volume of 7.5 mL. Use the dH2O syringe for our pH solution. To clean the syringe, flush it by drawing 6 mL of distilled water.

At this point I found that if the hot plate was at 147˚C the solution boiled more vigorously, meaning that my ketone hade a boiling point of 147˚C, which was close to the known boiling point value for 3-heptanone , 146˚C. The hot plate was turned down after this was noticed. After the solution was heat, approximately for five minutes, the mass was found for the bottom layer, which was 2.27g, and the percent yield was calculated. The percent yield was determined by taking the mass of the final ketone and dividing it by the original mass of the alcohol.

c. Imaging GH Deficiency In the case of GH deficiency, measurement of GH in the blood is not very helpful for the sake of diagnosis. However the most frequently used test is the Insulin tolerance test (ITT).

In this experiment, the amount of water lost in the 0.99 gram sample of hydrated salt was 0.35 grams, meaning that 35.4% of the salt’s mass was water. The unknown salt’s percent water is closest to that of Copper (II) Sulfate Pentahydrate, or CuSO4 ⋅ 5H2O. The percent error from the accepted percent water in CuSO4 ⋅ 5H2O is 1.67%, since the calculated value came out to be 0.6 less than the accepted value of 36.0%.This lab may have had some issues or sources of error, including the possibility of insufficient heating, meaning that some water may not have evaporated, that the scale was uncalibrated, or that the evaporating dish was still hot while being measured. This would have resulted in convection currents pushing up on the plate and making it seem lighter by lifting it up

The tube “B” had only water in it so it was acting as our blank, a blank in our experiment was used to calibrate the spectrophotometer machine, it was identical to other tubes only that it did not have the solute that we were

HAPZ administered at higher dose level has shown significant decrease in kidney weight when compared to cisplatin control group but the lower dose of HAPZ has no effect in this aspect. Serum urea In cisplatin administered group there was a remarkable significant increase (228.67%) in the serum urea level in comparison to the normal control group. The results indicated that the drug showed a dose dependent significant reduction in the serum urea level towards normal range.

Nalidixic acid is filtered out of the blood and pass into the urine by the kidneys. Large amounts of the prescription go into the urine, which implies nalidixic acid can be utilized to treat bacterial contaminations in the urinary tract. But as for my practical, we got clearing zone of S.aureus instead of E.coli. Since the inhibition supposed to go to E.coli but maybe due to some technical error like too high concentration of Nalidixic acid when plated on S.aureus compared to E.coli, that is why we got false positive

Part C: Change the amount of the substrate First, the blank was prepared according to table 2 without the enzyme addition. The enzyme was added later after the blank was measured by the spectrophotometer. Table 2: The amount of Sodium Phosphate Buffer pH 7.0, L-Dopa, and enzyme needed in each cuvette.

The effect of the solution concentration of sodium chloride on diffusion in yam cores compared to the solution concentration of water Abstract The purpose of the experiment was to see if different solution concentrations had an effect on diffusion. Our group established a hypothesis that stated; sodium chloride will make the yam cores weigh less than in water. In order to start experimenting, we obtained 10 yam cores, weighed them and placed them in five cups that contained 50 mL of water.

The fifth titration, acid into buffer #4, had no great change, but the pH dropped slightly, but remained at around a pH of 4 for the rest of titration. The sixth and final titration, base into buffer #4, had a similar reaction to the previous titration except for the fact that the pH increased slightly at around 15 ml of base and remained the same pH for the rest of the titration. When comparing the reaction of acid/base into liver homogenate to acid/base into water and acid/liver into buffer #4, the reaction seemed to coincide a bit more with the reactions of the buffer. Although the pH increased/decreased in

The highest tissue concentrations were found inorgan such as the liver and kidney, but chloropyrifos (cpf) did not bioconcentrate in tissue at the time of study when pregnant rats were dosed with CPF at 7 mg/kg-day on GD 14–18, fetal brain TCPY concentration was twice as high as the maternal brain concentration, 5 hours after the last dose of CPF[67]. Metabolism The metabolic scheme for CPF is described below. Chlorpyrifos is bioactivated

The results support the hypothesis, the amount of duckweed in the containers with vinegar might have decreased due to the low pH level of the vinegar. The vinegar used in the experiment had an acidity of 5% and a pH level of 2.4, which but duckweed need a pH level of 6-7 in order to survive (McClung, 2013). The vinegar was too acidic for the duckweed to grow in, resulting in containers one and two turning white and decreasing in size faster than container three which only contained tap water. An explanation for why all three containers had a decrease in duckweed is that there was no oxygen added to them.