pencil lettuce seeds water hand lens Suggested Procedure: 1. Fold a paper towel in half. Fold it in half again. Place the bottom half of a dish in the center of the folded towel. With a pencil‚ trace the bottom of the container onto the folded paper towel. Cut out circles. Insert all the paper circles in the bottom half of the petri dish. 2. Using the same procedure‚ cut paper circles and place them in the other three containers. 3. Label the bottom of one container “lettuce.” Label
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Microbiology Lab Quiz #2 Study Guide Exercise 9 -- The Gram Stain Compare and contrast simple and differential staining techniques. Simple Staining Simple staining is useful in determining the basic morphology of an organism. Simple staining involves only one reagent i.e. crystal violet‚ basic fuchsin‚ or methylene blue. Simple dyes used to stain bacteria have a positive charge cationic (+)‚ therefore‚ they are attracted to the bacteria that are usually negatively charged anionic (-) Depends
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Discussion: 6. The ph solutions that were used were 2‚4‚7‚9 and 10. All of these solutions affected the beetroot‚ but the most acidic solutions were the ones that did the most damage to the membrane. This is because the ph affects the proteins within the phospho lipid bi-layer. The acidic ph breaks the hydrogen bonds therefore denaturing the proteins and allowing beetroot pigment to secrete form the cell. 7. The ethanol solutions that were used were 11%‚ 25% and 50% ethanol. The beetroot cell
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These medical disparities even start before the drugs even get to trial‚ “gender discrimination isn’t only a problem in clinics‚ it’s an issue in petri dishes.”3 Scientists have recently discovered that all human cells have different characteristic based on sex. When drugs are in the early stage of petri dish trials‚ they are tested on samples that are classified based on cancer type‚ with no consideration of the cell differentiation caused by sex in particular. This bias against
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Diffusion on Substances Lunar-maius A. Gaerlan Group 2 Sec. X – 9l August 15‚ 2012 ABSTRACT The effect of molecular weight on the rate of diffusion was assessed using agar-water gel test. The agar-water gel set up was composed of a petri dish of agar-water gel containing three wells. Drops of potassium permanganate (KMnO4)‚ potassium dichromate (K2Cr2O7) and methylene blue(C16H18N3SCl) were simultaneously introduced to each well. Methylene blue‚ having the largest molecular weight‚ displayed
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Animal testing has been used since before 384 B.C. Scientists have questioned the purpose of animal testing since the early 17th century. Progress has been made in trying to find alternatives for animal testing such as “studying cell cultures in a petri dish‚ which can produce more relevant
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Research- 3D Bioprinting Technology Sayda Perez ITT- Technical Institute Author Note Sayda Perez‚ Strategies for the Technical Professional‚ ITT- Technical Institute Correspondence concerning this research paper should be addressed to Sayda Perez‚ Department of MAA‚ ITT- Technical Institute‚ Lake Mary Campus Email: SPerez160@email.itt-tech.edu Introduction In today’s world‚ technology plays an important role in every industry as well in our personal lives. Out of all the industries‚ healthcare
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If a canned and fresh pineapple chunk were placed on separate petri dishes with jello‚ then the state of the jello would be similar because both pineapple samples contain bromelain‚ a protein digesting enzyme. Jello consists of collagen‚ which can be found in animal bones and tendons‚ therefore classifying jello as
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Aim: To investigate the effect to the potato cells in the different solute concentration water Introduction; Water can move through the different cells due to the difference of water potentials in the cells. If there is a higher solute concentration in the cell than outside the cell‚ the water will move into the cell. However‚ if the concentration of inside the cell is lower than the outside‚ water will not move into the cell. This process is called osmosis. Research question; This investigation
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showed that NH3 which has a relatively lower molecular weight (MW NH3= 17.03 g/mol) than HCl (MW HCl= 36.46 g/mol) diffused at a faster rate (dave NH3 = 19.35 cm) compared to HCl (dave HCl= 16.18 cm). Another experiment was performed with the use of petri dish containing an agar-water gel with three wells. One drop of each substance (potassium dichromate‚ potassium permanganate‚ and methylene blue) was placed on each respective well. In three-minute interval for 30 minutes‚ potassium permanganate‚ which
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