Paper Towel Lab Report

In this lab, three different brands of paper towel were tested to see which brand could absorb the most water. The brands that were tested were Bounty, Sparkle, and the Dutch Fork High School paper towels. To understand which paper towel would be the most absorbent one must know what makes paper towels absorbent in the first place. Studies show that, “Paper towels are made up of cellulose fibers, which also make up cotton, wood, and most other plants. These cellulose fibers are actually giant molecules that consist of many small molecules linked together. The small molecules that combine to make up cellulose are sugar molecules; that’s the key to the absorbency of paper towels.” (Brown, 2013). Other key factors that play into the absorbency

I believe that Walmart brand paper towels are just as absorbent as Bounty brand paper towels. All paper towels are made from paper pulp that is woven to create a large sheet. Because all paper towels are made from the same material I believe that the Walmart brand will absorb just as much liquid as the other brands. I will prove my hypothesis through a scientific experiment comparing three brands of paper towels. I chose three brands with three very different price points. Am I paying more money per roll for a higher quality towel or are all paper towels made the same, therefore will absorb equal amounts of liquid. I will put each paper towel brand through an absorbency test 4 times to get an average amount of liquid absorbed. I am

The mole is a convenient unit for analyzing chemical reactions. Avogadro’s number is equal to the mole. The mass of a mole of any compound or element is the mass in grams that corresponds to the molecular formula, also known as the atomic mass. In this experiment, you will observe the reaction of iron nails with a solution of copper (II) chloride and determine the number of moles involved in the reaction. You will determine the number of moles of copper produced in the reaction of iron and copper (II) chloride, determine the number of moles of iron used up in the reaction of iron and copper (II) chloride, determine the ratio of moles of iron to moles of copper, and determine the number of atoms and formula units involved in

In the beginning of lab, we were advised to obtain a nutrient agar petri plate, which is used for the cultivation of microbes supporting growth of non-fastidious organisms. Since it contains many nutrients, a wide variety of bacteria and fungi can grow. Taking the plate,

The results of the experiment for the test of absorbency were that the Sparkle brand proved to be the most absorbent. The average amount of liquid that the Sparkle brand paper towel held was 17.4 mL, which was 4.6 mL more than the Decorator brand held. The Decorator brand only held 12.8 of liquid.

A buffer is a solution that resists changes in pH when H+, OH-, or H20 is added. By using standard lab equipment, a lab pro diagnostic tool, and acidic and basic solutions, the pH can be found. By recording the pH while adding a base or an acid gradually to a buffer solution you can find the capacity of each buffer to resist drastic changes in pH. The best buffers will keep a solution from becoming either too acidic or basic with the addition of a strong base or acid.

|EMB Agar | |Distinguishes bacteria that ferment |Dark blue colonies with|E. coli and P. |

III. Hypothesis: If I stack quarters on a wet paper towel, then Bounty will be able to hold the most amount of quarters without ripping.

I've used several different laundry bags for washing over the years and have to say these Delicates Laundry Bags from Inside Smarts are by far my favorite!

• Different types of paper towels- To test out which paper towel absorbs most liquids in the experiment.

Make use of brainwave instruments to record the brain wave graphics that have been amplified from the potential changes generated by brain neurons, which have been used as the diagnosis basis for brain abnormal discharge and other issues by doctors and physicians. The goal is to observe the change of early Alzheimer’s disease by observing the physiological signal of brain waves. Before the test, please clean your hair. Hair oil and hair sprays are prohibited. Please enjoy a sound sleep and do not take sedatives, hypnotics, coffee, or tea to improve the accuracy of the examination. Please empty your bladder and relax pre-examination. Scrub cream will be used to clean the skin of the subjects to reduce the recording electrode resistance, and

1. Lab reports are to be computer-generated and double-spaced. All sections of the report must

In this experiment each individual used the same hand washing method to measure the effectiveness of clean hands with antiseptic vs. dirty hands with no antiseptic. Afterward, observing the reduction of the number and types of bacteria on his or her hands. The antiseptic used in this experiment was one pump of Germ X with no paper towels after applying. After an incubation period of one night the plates were looked at and test results/pictures were obtained. Growth was indicated by a + for growth, a ++ for tremendous growth and a – for no growth at all.

In this laboratory experiment, we was introduce to an introduction to streaking and spreading of bacteria in agar plates such that single cells can be isolated from one another, each cell can reproduces to form a visible colony composed of genetically identical clones. Streaking and spreading bacteria is to obtain individual colonies is usually the first step in genetic manipulation of microorganisms.

Life on this planet began with microorganisms. Through millions of years microorganisms have found ways to successfully adapt and survive. These adaptations have created a wide biodiversity, allowing them to basically populate in all places. Why are these microbes so important? Because they shape the history of our world. Some microbes can be deathly to humans while some others are favorable, for example, bacteria that lives in the gut of both humans and animals and helps during the process of digestion (Alfred Brown & Heidi Smith, 2006). Understanding these interactions help scientists to find ways to protect humans from potential deathly pathogens. In order to observe microbes, microscope proficiency and microorganisms’ identification are crucial skills in a microbiology lab. During this laboratory session, samples of environmental and human organisms were inoculated into two different rich media and incubated to their according temperature. After this, appropriate use and calibration of the microscope was performed. Lastly, morphology and size of different species of bacteria, algae, fungi and protozoan were recorded.