State the specific purpose for each of the two procedures used in this lab: tube dilution...
- State the specific purpose for each of the two procedures used in this lab: tube dilution and fingertip antisepsis.
2. For each procedure, tube dilution and fingertip antisepsis: Identify the control and state its purpose.
3.Cite advantages and disadvantages of the two procedures (tube dilution and fingertip antisepsis) used in this lab to assess antibacterial activity of chemical agents. (Hint: Think about the differences between the two procedures.
Homework Answers
Tube Dilution is the standard method for determining levels of resistance to an antibiotic.
Fingertip Antisepsis is the measure of the number of Colony Forming Units(CFU) cultured from 10-digit fingertip imprints on agar plate. It approaches actively, acting against microbes.
The disadvantages of both the techniques are:
1. Labor-intensive and expensive
2. Test cannot be done in more than one antibiotic at a time.
The merit is that, it provides accurate determination of minimum inhibitory concentration of microbes.
Add Answer to:
State the specific purpose for each of the two procedures used
in this lab: tube dilution...
Lab : Aldol Condensation Purpose. In this lab you will conduct the Aldol condensation reaction under solid-state...
Lab : Aldol Condensation Purpose. In this lab you will conduct the Aldol condensation reaction under solid-state reaction conditions that will involve grinding reactants in the solid phase. You must read ahead and learn about this reaction and the chemical mechanism for the Aldol condensation. There are two possible products which are the initial Aldol or subsequent elimination product. You will need to isolate and purify your reaction product. You will use your melting point, IR, 1H and 13C NMR spectra to...
please do two pargraph about this pre lab and lab include Title,purpose ,chemical eqution if their...
please do two pargraph about this pre lab and lab include
Title,purpose ,chemical eqution if their any ،Procedure
,Hazards(hazard Identification,physical and chemical
properties),Experimental Phase, Data
&Observations,Data&Observations cont (melting point and
meling point). and Calcuations
Spinach Laboratory Procedure PROCEDURES Isolation of pigment from leaves: 1. Wash the spinach leaves. Weigh 1.0 g-2.0 g of dry spinach leaves. Remove any stems and veins from the leaves before you weigh. 2. Combine 1.0 g of anhydrous magnesium sulfate with 0.5 g of sand...
Bio 121 I need to make (yeast fermentation) lab report. This is the lab results: This...
Bio 121
I need to make (yeast fermentation) lab
report.
This is the lab results:
This is a guide to making the lab report:
Data Summary Sheet Date Experiment One: Glucose Fermentation Table One CO2 Production and Glucose Utilization over Time Actual Clock Time 7. 30 Elapsed Time in minutes ml. CO2 Glucose Concentration > 2000 9 ldl 10 3 m ymt 4. Som 50 m There will be two lines on the graph of the data from Tube #1...
Lab Report-Carbohydrates 1. Purpose 2. Special Media for Isolating Bacteria (Lab #12) a. Why are dyes...
Lab Report-Carbohydrates 1. Purpose 2. Special Media for Isolating Bacteria (Lab #12) a. Why are dyes such as phenol red, eosin or methylene blue added to the media? b. How does the bacterium change the media (i.e color of agar or colonies) after incubation? C. In this experiment, which media are selective, and which are differential? d. How did the results observe on the mannitol salt agar and EMB agar correlate to the Gram reaction of the bacteria? e. What...
are theses correct? please correct me if they are not. Results Fe Test Tube 2: FeSCN...
are
theses correct?
please correct me if they are not.
Results Fe Test Tube 2: FeSCN (aa) SCN () Fe Chemical equation: Explanation: The equilibrium shifted toward the increased the due to the addition of Fe(NO,)) because it of the Test Tube 3: FESCN 0) SCN () (as Chemical equation: Fe(ag) Explanation: Test Tube 4: Chemical equation: Fe(agk FeSCN( (aq)h Explanation: Test Tube 5: Chemical equation: Fe"( SCN () FESCN 3+ + (sq) Explanation: Test Tube 6 Chemical equation: Fe(a...
Bio 121 I need to make (yeast fermentation) lab report. This is the lab experiment and...
Bio 121
I need to make (yeast fermentation) lab
report.
This is the lab experiment and results:
This is a guide to making the lab report:
General Biology BIO121 Yeast Fermentation Lab Introduction Organisms stay alive by the utilization of energy through metabolism. The energy acquiring pathways in photosynthesis convert radiant energy from the sun into the chemical bond energy of carbohydrates. This photosynthetic process is limited to the producers or autotrophs, which include plants, photosynthetic bacteria and some protists....
A. For each study identify: IV, DV and the number of samples used. B. Think about...
A. For each study identify: IV, DV and the number of samples used. B. Think about the differences among the studies and suggest the ap! unterences among the studies and suggest the appropriate statistical test (use Study guide 2 for possible tests) C. Perform the test for study # 1 and study #3. 1. A researcher knows that the weights of 6-year old children are normally distributed with 20.9kg and 0 - 3.2. She suspects that children in poverty-stricken regions...
Please help with pre-lab questions. Pre-Lab Questions: 1. A sample of 2-butanol has a specific rotation...
Please help with pre-lab questions.
Pre-Lab Questions: 1. A sample of 2-butanol has a specific rotation of +3.25. Determine the optical purity (%ee) and percent composition of this sample (see Mohrig section 17.4). The specific rotation of pure (+)-2-butanol is +13.0°. 2. The equation for the formation of the diastereomeric salts is shown in the background information (performed in Part A of the procedure). Write this chemical equation in your notebook, then ALSO write a balanced equation for the formation...
please help with all pre-lab Dynamic Equilibrium Simulation with Pennies 1 of 11 on Equilibrium is...
please help with all pre-lab
Dynamic Equilibrium Simulation with Pennies 1 of 11 on Equilibrium is a state where there are no observable changes over time. Equilibrium is achieved when the rate of the forward reaction equals the rate of the reverse reaction. R =P In this activity, we will simulate a reversible reaction where R = P: the reactant molecules (R) are pennies, which react and are transferred from the side to the P side, while the product molecules...
Grignard Reaction with a Ketone: Triphenylmethanol Introduction: The purpose of this lab is to prepare phenylmagnesium...
Grignard Reaction with a Ketone: Triphenylmethanol Introduction: The purpose of this lab is to prepare phenylmagnesium bromide, a Grignard reagent, and react it with benzophenone to give triphenylmethanol. Grignard reagents are very reactive and must be synthesized in an environment free of water or any other source of potential proton donor. Once made, the Grignard reagent will do a nucleophilic attack on the carbonyl carbon of the ketone, benzophenone. The result is an alkoxide that is then protonated to give...
please do two pargraph about this pre lab and lab include
Title,purpose ,chemical eqution if their any ،Procedure
,Hazards(hazard Identification,physical and chemical
properties),Experimental Phase, Data
&Observations,Data&Observations cont (melting point and
meling point). and Calcuations
Spinach Laboratory Procedure PROCEDURES Isolation of pigment from leaves: 1. Wash the spinach leaves. Weigh 1.0 g-2.0 g of dry spinach leaves. Remove any stems and veins from the leaves before you weigh. 2. Combine 1.0 g of anhydrous magnesium sulfate with 0.5 g of sand...
Bio 121
I need to make (yeast fermentation) lab
report.
This is the lab results:
This is a guide to making the lab report:
Data Summary Sheet Date Experiment One: Glucose Fermentation Table One CO2 Production and Glucose Utilization over Time Actual Clock Time 7. 30 Elapsed Time in minutes ml. CO2 Glucose Concentration > 2000 9 ldl 10 3 m ymt 4. Som 50 m There will be two lines on the graph of the data from Tube #1...
Lab Report-Carbohydrates 1. Purpose 2. Special Media for Isolating Bacteria (Lab #12) a. Why are dyes such as phenol red, eosin or methylene blue added to the media? b. How does the bacterium change the media (i.e color of agar or colonies) after incubation? C. In this experiment, which media are selective, and which are differential? d. How did the results observe on the mannitol salt agar and EMB agar correlate to the Gram reaction of the bacteria? e. What...
are
theses correct?
please correct me if they are not.
Results Fe Test Tube 2: FeSCN (aa) SCN () Fe Chemical equation: Explanation: The equilibrium shifted toward the increased the due to the addition of Fe(NO,)) because it of the Test Tube 3: FESCN 0) SCN () (as Chemical equation: Fe(ag) Explanation: Test Tube 4: Chemical equation: Fe(agk FeSCN( (aq)h Explanation: Test Tube 5: Chemical equation: Fe"( SCN () FESCN 3+ + (sq) Explanation: Test Tube 6 Chemical equation: Fe(a...
Bio 121
I need to make (yeast fermentation) lab
report.
This is the lab experiment and results:
This is a guide to making the lab report:
General Biology BIO121 Yeast Fermentation Lab Introduction Organisms stay alive by the utilization of energy through metabolism. The energy acquiring pathways in photosynthesis convert radiant energy from the sun into the chemical bond energy of carbohydrates. This photosynthetic process is limited to the producers or autotrophs, which include plants, photosynthetic bacteria and some protists....
A. For each study identify: IV, DV and the number of samples used. B. Think about the differences among the studies and suggest the ap! unterences among the studies and suggest the appropriate statistical test (use Study guide 2 for possible tests) C. Perform the test for study # 1 and study #3. 1. A researcher knows that the weights of 6-year old children are normally distributed with 20.9kg and 0 - 3.2. She suspects that children in poverty-stricken regions...
Please help with pre-lab questions.
Pre-Lab Questions: 1. A sample of 2-butanol has a specific rotation of +3.25. Determine the optical purity (%ee) and percent composition of this sample (see Mohrig section 17.4). The specific rotation of pure (+)-2-butanol is +13.0°. 2. The equation for the formation of the diastereomeric salts is shown in the background information (performed in Part A of the procedure). Write this chemical equation in your notebook, then ALSO write a balanced equation for the formation...
please help with all pre-lab
Dynamic Equilibrium Simulation with Pennies 1 of 11 on Equilibrium is a state where there are no observable changes over time. Equilibrium is achieved when the rate of the forward reaction equals the rate of the reverse reaction. R =P In this activity, we will simulate a reversible reaction where R = P: the reactant molecules (R) are pennies, which react and are transferred from the side to the P side, while the product molecules...
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