Materials: 1 rectangular container 1 grease pencil 4 petri dishes 4 pieces of filter paper or paper towel 40 radish seeds (10 per petri dish) 1 paper plate Tweezers 100 mL beaker Stirring Stick Salt (1g, 2g and 3g)-measured out for you Dropper Procedure: (Don’t forget to take notes in your lab notebook. Keep a detailed description of every step you take so that someone else could accurately and precisely reproduce your results). See Lab Report Format for how your final Lab Report should look. 1. Determine what your group’s hypothesis will be and write it as an “if, then” statement on your lab report.
The tests performed on the unknown bacteria culture were all used to determine and identify the bacteria. Each of the tests performed provided some key information about the bacteria in question and how it functions. Even though I performed, all the tests listed above I will only be detailing a few that I used as determinants according to my dichotomous key. The oxidase test was used to test for the presence of cytochrome oxidase. The unknown bacteria was taken from the NA agar slant and placed on an oxidase strip in a drop of distilled water.
Eggsellent Lab Analysis Questions 1. Draw and label two pictures - Initial and Final - showing the movement of food coloring molecules. You must use all of the following words: high concentration, low concentration, diffusion, and cell membrane 1. Draw the egg after it has been in the food coloring for 24 hours. Explain what might have occurred (be sure to explain what conditions had to exist both inside and outside the egg)using all of the following terms: diffusion, semi-permeable membrane, high concentration, low concentration.
See the Syllabus "Due Dates for Assignments & Exams" for due date information. Lab Complete this week's Lab. A complete set of instructions is under the Lab area. Submit your Lab to the Dropbox located on the silver tab at the top of this page. For instructions on how to use the Dropbox, read these step-by-step instructions or watch this Dropbox Tutorial.
We then shook the jar until it was well mixed and waited about thirty minutes for the mixture to settle. Once it settled we measured the thickness of each layer of the soil. In the water holding experiment we simply filled a beaker with 100 ml. with garden soil then poured water into the beaker to saturate the soil enough so that there was no air trapped in the dirt. We measured the amount of water we used and calculated the pore space as well as the percentage of pore space.
Laboratory Experiment pubs.acs.org/jchemeduc A Two-Step Synthesis of the Laundry Detergent Perfume Additive β‑Citronellyl Tosylate Cheryl M. Mascarenhas* Department of Chemistry, Benedictine University, Lisle, Illinois 60532, United States S * Supporting Information ABSTRACT: A two-step synthesis of the compound β-citronellyl tosylate is described. The final product, synthesized by the reduction of β-citronellal with sodium borohydride followed by a solvent-free tosylation, is used as a perfume precursor and additive to laundry detergent. This project can be performed in two weeks in a typical second-year organic chemistry teaching laboratory. It exposes students to perfume chemistry, a topic not typically discussed in an organic chemistry course. Moreover, the solvent-free tosylation step of the reaction leads pedagogically to a discussion about green chemistry.
Control Test Various material used in the previous tests were also tested as controls. All samples collected in the Petri dishes from the three tests were incubated for several days. In accordance with common sense, the samples collected from the unwashed fingers and benches will exhibit the largest growth of microbial colonies, while the samples collected after the fingers and benches were washed with either soap or disinfectant will exhibit a lower growth. As for the time test, the Petri dishes exposed the longest to the open air will see
Name: Jeffrey S. Webster Date: 8th October, 2007 Course: BC21D ID No. : - Lab Partners: Paul Bair, Jermaine Levy, Rochelle Allen Aim To extract and purify the enzyme invertase, thereby allowing for subsequent study of the effects of the parameters of [enzyme], [substrate], pH, temperature, and inhibitors on invertase activity. Method As outlined in the BC21D lab manual. Effect of Temperature on reaction velocity Place 1.0 ml of sucrose and 0.8 ml of pH 4.7 acetate buffer into a test tube and incubate for 6 minutes in a water bath at 37 oC. Add 0.2 ml of yeast invertase and incubate at the same temperature for 6 mins.
Comparison of using a salt water & tap water to plant a green bean 2013-2014 Davis Poon 7A25 Comparison of using a salt water & tap water to plant a green bean 2013-2014 Davis Poon 7A25 Math & Science Project Math & Science Project PLAN Group Leader Jasper Group Mates Davis, Christopher, James,Leo -Work Division Everyone will plant the green bean and make a deep investigation about a 10 days experiment. -Jasper have divide us in to different jobs and give us the method to achieve our aims and goals TimeLine 28/11 10days observation-> 10/12 Collect data-> 11/12 Doing report-> 13/12 Deadline 1. Objective We will strive to discover the difference of the plant which is using different type water to plant. Besides, we will also discover the reason why the difference will change the growth rate 2. Hypothesis Using tap water to plant will have faster growth rate instead of salt water 3.
Nutrition for Wellness All living things need food and water to live. Beyond that, we need nutrients to live well. From this point of view, we can describe nutrition as a science of how the body uses food. Understanding how good nutrients protect us and allow us to function properly is of great importance. Nutrition’s main task is to describe which foods and beverages provide the energy and essential materials we need to support our bodies and maintain every organ and system.