8-Acid-Fast Stain_needs Qs (2)

a. How was the specimen prepared for the microscopy technique applied? (for e.g. stained with H&E stain, Gram stain, unstained)   b. What is the microscopy technique and magnification used to obtain this image?   c. What is the basic principle of image formation using this microscopy technique?   d. What can be observed and concluded from the image of the specimen?   e. Are there any potential aberrations present in this specimen image? Describe these and how they may affect interpretation of the result.

Direction: Read and analyze the following laboratory experiment and answer the following question. PART 1: SURFACE AREA AND CELL SIZE Materials: Agar containing NaOH, and the pH-indicator dye phenolphthalein cured into cubes of various size, 3 plastic cups, HCl, metric ruler, paper towels. Methodology: 1. Safety: Wear goggles and nitrile gloves while completing this lab. 2. Obtain three different size blocks of pink or blue agar. Using a ruler, measure the length, width, and height of the three blocks given below. Cut the agar according to the given dimension. Small = 1 cm x 1 cm x 1 cm Medium = 2 cm x 2 cm x 2 cm • • Large = 1 cm x 1 cm x 6 cm 3. Record your data. 4. Pour HCl or vinegar into two small cups. Place the one larger "cell" into one cup and the two smaller cells in the other cup. Start timing 30 minutes. 5. After 30 minutes, remove the cells and blot them dry with a paper towel. 6. Using your ruler, measure the distance the HCl has diffused into the blocks as shown on the…

Discuss about Fluorescencemicroscopy

Please include your reference below for my further research. Thank you! 1. What are the basic components of a Fluorescence Microscope and what are the functions of each?   2. Are there any parts that you can remove without compromising accuracy and utility of the equipment?  3. Can you suggest additional components to improve the equipment?

Subject : Environmental Microbiology  Can u use the information given below to answer these 2 question  1.Provide an aim for this lab 2. Provide objectives  DISCUSSION QUESTIONS   What is the relationship between the resolution power and the useful magnification that may be obtained with the light microscope?  What determines the resolving power of the lens system?                                What is the limit of resolution obtainable with the light microscope?                                                 How you will distinguish between bright field and dark-field microscopy and provide a specific example where each would be method of choice for observing a culture of bacteria?    What advantages does electron microscopy have over light microscopy?    What are disadvantages of electron microscopy over light microscopy?                               #Compare the use and the methodology of TEM with SEM? Provide at least one example where each would be the method of choic

topic: gel electrophoresis . What are other staining methods that can be used for PAGE?

Copy and paste the link below and watch the video on Youtube https://www.youtube.com/watch?v=8RBs0Ghg_48   Answer the following Questions: 1. What are the chemicals and materials used in gel electrophoresis?   2. Draw a schematic diagram of a gel electrophoresis set-up 3. Describe the procedure in doing a gel electrophoresis experiment. Why is there a need for a leveling bubble/leveler? What is the use of the rubber dam?   4. What is the use of ethidium bromide and why must you wear gloves when you handle it?   5. What makes the DNA fragment move towards the positive plate?   6. What is the purpose of glycerol in the sample buffer?    7. What is the use of a DNA ladder?    8. What will happen when you increase the voltage of the set-up?   9. Can gel electrophoresis be used to separate amino acids? If so, how is it done?

Make a concept map/flow chart for this technique (Cellulose Tape Perianal Swab)

MICROBIOLOGY:  Microscopic Morphology of Microbes Write your introduction (This includes principles, significance of the study, objectives of the experiment and how the objectives were achieved. This part must also be in the passive voice and past tense. Introduction must be short but packed with relevant content). another: What is the advantage of the Gram stain over the simple stain? What is the theory about the mechanism of the Gram-stain reaction?

3) Define gel electrophoresis, including its theory and application. Describe the steps of running gel electrophoresis using the following image. More detailed reading: https://www.sciencedirect.com/topics/medicine-and-dentistry/agar-gel-electrophoresis POWER SUPPLY CATHODE ELECTROPHORETIC BUFFER ANODE WELL SAMPLE AGAROSE GEL POWER SUPPLY CATHODE ANOCE HIGH MOLECULAR WEIGHT SPECIES LOW MOLECULAR WEIGHT ANALYTES

Describe your results in the following data chart as directed in the instructions for the laboratory exercise. Treatment Control 0.01% Bleach 0.1% Bleach 1.0% Bleach 2.5% Lysol 5% Lysol 10% Lysol 0.03% Hydrogen Peroxide 0.3% Hydrogen Peroxide 3.0% Hydrogen Peroxide 10% Isopropyl Alcohol 30% Isopropyl Alcohol 50% Isopropyl Alcohol Growth

please help me make this procedure a flow chart   III. Procedure: A. MicroscopyOperating Procedure:Place the microscope close to the edge of the table. Select a suitable stool so that when looking into the eyepiece, your back is straight and your neck is bent at the nape.1. Lower the body tube by turning the course focus knob until the 10x or 16mm objective reaches the downward stop.2. Look through the eyepiece and adjust the mirror to the position which provides the brightest and the most evenly illuminated field of vision which is the circular area seen in the eyepiece. Raise the condenser until its top lens at the same level as the stage. Place the slide on the stage and fasten it using the stage clips.3. Position the specimen area of the slide over the center of the stage aperture.4. Looking through the eyepiece, raise the coarse focus knob until the image appears. Focus as sharply as possible. Low power objective has a much greater depth of focus and is generally used for the…

Question:- Starting with data collection, describe the steps necessary to determine a 3-Dimensional structure using electron microscopy methods.

1:07 < Вack Untitled 6 Brownian movement of bacteria: O a. Can be observed by the of soft agar technique O b. Can be observed by staining of Staphylococcus aureus Oc. Is common in Escherichia coli or Proteus vulgaris O d. Is common in Staphylococcus aureus O e. Can be observed at the edge of a microscope CLEAR MY CHOICE

Choose the one answer that fits best. Which of the following statements regarding the proper procedure for using Micropipettes is NOT correct? O a. You cannot use a 2-20 µl micropipette to pipet 200 µl O b. To expel all the liquid from the tip, you have to press the eject button O c. To draw up solution, press and hold the plunger at the first stop before entering the solution O d. Micropipettes always require the use of a disposable plastic tip O e. While pipetting, micropipettes should always be held as straight as possible

PROCEDURE: 1. Set two pencils down parallel from each other. Make them about 2-3 inches apart as the length of your slides to keep things easy. 2. Stick a long piece of tape over the two pencils and to the table on either side of the pencils to hold the tape tightly between the two pencils like a bridge. 3. Don’t touch the sticky side of the tape or you will ruin the microscope. Drop a small drop of water onto the top of the tape using the pipette or medicine dropper. 4. Make 3-4 lines of tape and add a different-sized drop to each one. This will help determine what size of water droplet produces the biggest magnification. 5. Prepare a rectangular shape of plastic cover. Put a small slice of onion. Slide the rectangular shape of the plastic cover with the small slice of onion under the pieces of tape and observe the size of the onion on different droplets. Write your observations on the table below. No. of drops Observation

mead. Post Lab #2 Smear & Stain Preparation Name: Leidiawa MontaNo Date: 1. Why are thick or dense smears less likely to provide a good smear preparation for microscopic evaluation? Please explain. Becapse, it will diminish the amount ds latcan Pass through by mam 1t difficult to See under the micioscol e, s less liket to Prowde a go image. 2. What could potentially happen if you leave the slide exposed for too long to the open flame? Why do you have to be careful? we can form ring Patterns if we expose the slide for ta0 the flame 3. During the preparation of a smear leading into simple staining of the bacterial culture S. epidermidis you forgot to heat fix the slide. What would you see on this slide as compared to a slide that was properly prepared? Please explain. 4. You partner stained bacterial cells and saw only the background and not the actual cell was stained. Your partner thought this was a mistake. Please explain what type of staining method this is, how it works and why the…

Gel used in electrophoresis is/are: a. Agarose gel b. Polyacrylamide plain gel c. Polyacrylamide SDS impregnated Polyacrylamide gel (Sodium dodecyl sulphate)

Discuss SSD (non-isocentric) technique and SAD (isocentric) technique including the advantages and disadvantages of each type of setup.

Discuss the steps from dissection of tissue to producing a section on a slide ready for staining, as provided for this practical and as would be carried out in a hospital lab. include principles and procedures for each step. maximum word limit 400

A. Purpose: Figure 1 B. Materials: Microscope Magazine Slides and cover slips Paper towels Pipette Scissors C. Procedure: 1. Careful carry a microscope to your lab area. Make sure to hold it with one hand under the base and one hand on the arm as shown in Figure 1. 2. Plug the microscope in and turn it on. Take a moment to look at all the parts of the microscope. Then look at your ocular lens. What is the magnification of the ocular lens (eye piece)? Figure 2 3. Fill in the chart to show the total magnification for each objective lens. Magnification of Ocular Lens Magnification of Objective Lens Objective Lens Total Magnification Low Power Medium Power High Power

Horizontal sequence :VIRL Vertical sequence:MKF   Scoring rules: g/o = -3, g/e = -1, match or mismatch - from PAM250 substitution matrix below.    SW algorithm.    1. Complete the scoring matrix.    Scoring matrix with PAM250 scores:     V I R L M         K         F           2. Set up, initialize and complete the SW matrix.  3. Retrace, align and score alignment(s).             Use the arrows and circles for the matrix and path(s).                                                                                                                                                                                                                                                                                                                                 V I R L             M           K           F             Align and score all optimal alignments here.

Horizontal sequence :VIRL Vertical sequence:MKF   Scoring rules: g/o = -3, g/e = -1, match or mismatch - from PAM250 substitution matrix below.  SW algorithm.    1. Complete the scoring matrix.    Scoring matrix with PAM250 scores:   V I R L M         K         F           2. Set up, initialize and complete the SW matrix.  3. Retrace, align and score alignment(s).             Use the arrows and circles for the matrix and path(s).                                                                                                                                                                                                                                                                                                                                 V I R L             M           K           F           Align and score all optimal alignments here.  PLZ  the arrows and circles for the matrix and path(s) AND SHOW ALL possible Alignment

B. Write the function/s of each part of the microscope listed below. a. Eyepiece b. Draw tube c. Hemispheric prism housing d. Dust shield e. Revolving Nose Piece f. Objectives: Scanner LPO HPO ΟΙΟ g. Arm h. Coarse Adjustment knob i. Fine adjustment knob j. Slide holder & clip k. Rear knob I. Front knob m. Central aperture n. Condenser o. Iris diaphragm p. Mechanical Stage q. Mirror r. Mirror rack s. Stage adjustment knob t. Base

The significance of using immersion oil when using 1OOX objective lens is The significance of using immersion oll when uskng 100X objective lens is: It will increase the contrast by having same refractive index as the lens, loss of light by refraction, reflection and diffraction is minimized. the specimens need not be killed, fixed and stained more light is captured for better illumination, allowing the specimen to fluoresce i. il. iii. iv. A light microscope should have the following features contrast Resolution magnification fluorescence ii. iv.

Question:- Describe control strains used in the clinical microbiology laboratory and explain their maintenance in the laboratory. ( write BY WORD and all steps I need). Introduction Discussion References

Discuss the principles and applications of Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry in molecular diagnostics.

Explain the importance of steam during the acid-fast staining procedure. Discuss the advantages of differential staining procedures over the simple staining techniques. List and briefly describe the functions/purpose of each of the different stains used in acid fast staining.

INSTRUCTION: EXPLAIN THOROUGHLY THE TWO THEORIES INVOLVED IN GRAM STAINING (CELL WALL AND LIPIDS THEORIES) IN RELATION TO THE TWO STATEMENTS BELOW. In THEORY OF CELL WALL, Gram-positive bacteria have heavy peptidoglycan, which helps decolorizer (alcohol) to dehydrate the gram-positive cell wall and traps the crystal violet complex inside the cell wall and maintains the purple color of crystal violet.  In THEORY OF LIPIDS, Gram-negative bacteria have high lipid amount (10-15%) in the cell wall, which makes decolorizer (alcohol) easily to remove the crystal violet complex, and then colorless cell wall is stained with safranin and appears pink/red color.