For the juice samples in exercise 3-4, you will be using the pour plate technique. In this exercise, you will add juice to a petri dish and pour agar over the sample and mix. Why is the media (potato dextrose agar, PDA) kept in a water bath until you are ready to use it, and why must you work fairly quickly? (One response answers both questions). The media is already solid and will form chunks O The media has a dye added to it that must be kept at 45°C until ready to use O PDA is a media that allows growth of many types of fungi, and the heat from the water bath keeps the fungal spores from growing. The media is kept liquid in the water bath with heat, removing the tube from the heat source will cause the PDA to solidify

Two dyes wereplaced in an agar gel. Which dye migrated through thegel faster? Why? Explain in brief simply terms

Practice problems: Do on folder paper. 1. You are observing a cell; total magnification 100X. It looks like about 7 cells will fit across the field of view's diameter. How large is this cell? Explain. 2. For the 2nd specimen, you are using a total magnification of 400X. It's harder to estimate this time, so you approximated that 12 cells would fit across the radius. Explain how you would find out the size of one cell.

MATERIAL METHOD RESULT SUMMARY     Lecia DCM3D confocal Microscope 1) Straumann (Straumann AG, Waldenburg, Switzer- land) 2.2mm in diameter (for short, A) (2) Nobel Biocare (Nobel Biocare AB, Goteborg, Sweden) 2.0mm in diameter (for short, B) Xive Implant System (Friadent GmbH, Mannheim, Germany) 2.0mm in diameter (for short, C) (4) Global D (French) 2.5mm in diameter (for short, D) (5) Sweden & Martina (Padova, Italy) 2.5mm in diameter (for short, E)   The microstructural parameters used by the discriminatory analysis revealed many differences between the five manufactures in terms of roughness of the drilling surface. Marenzi et al (2018) have considered that Surface micromorphology, which affects the contact between the drill and bone, has been shown to contribute to heat, wear, and corrosion phenomena due to material abrasion and corrosion resistance through several surface texture indicators Can be seen as a factor. Not only the design, but also the…

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When running a gel, the lane loaded with a negative control sample should will always show a band that lines up with the experimental band, regardless if the sample is contaminated. not show a band, which indicates the sample is contaminated. show a band, which indicates that the sample is not contaminated. not show a band, which indicates that the sample is not contaminated.

In sample preparation for electron microscopy, arrange the following steps in correct order A. Apply non-coagulant fixatives to kill cells instantly with minimal structural alterations. B. Wash the specimen with deionized water and then dry it by passing through increasing concentrations of ethanol. C. Expose specimens to uranyl salts to enhance the electron scattering capacity of cellular components. D. Using an ultramicrotome, make ultrathin cuts in the embedded specimen that would be penetrable to electrons. E. Allow the embedding medium to seep into the interstices of the tissue.

In disc diffusion studies, where will the lowest concentration of the tested chemical be in the agar plate? in the agar directly below the disc O in the agar halfway between the disc and the petri dish wall O in the agar furthest away from the disc the cehmical is equally distributed throughout the agar

In an electrochemical cell, Q = 0.00025 and K = 0.70. What can you conclude about Ecell and E°cell?     Ecell is positive and E°cell is positive     Ecell is negative and E°cell is positive     Ecell is negative and E°cell is negative     Ecell is positive and E°cell is negative

how did you get 104 as the dilution factor? I got 10-2 as the dilution factor for the CNFL plate