Contact Us
Sign In / Sign Up for FREE
Go to advanced search...

Disifectant lab - Assignment Example

Comments (0) Cite this document
Various disinfectants exert their effects in various ways depending on the chemical compositions of their molecules (McDonnell and Russell 147). For example, Lysol acts by interfering with cell membranes and denaturation of bacterial proteins and enzymes. It is effective…
Download full paper File format: .doc, available for editing
GRAB THE BEST PAPER94.1% of users find it useful
Disifectant lab
Read Text Preview

Extract of sample "Disifectant lab"

Microbiology Lab 10 May Disinfection Lab Various disinfectants exert their effects in various ways dependingon the chemical compositions of their molecules (McDonnell and Russell 147). For example, Lysol acts by interfering with cell membranes and denaturation of bacterial proteins and enzymes. It is effective against Gram positive S. aureus (inhibition diameter of 30mm) and Gram negative bacteria (P. aureginosa and E. coli at inhibition diameters of 30 and 20 mm). Spic and span contains various chemicals including octyl decyl dimethyl ammonium chloride and dioctyl dimethyl ammonium chloride, which work by destroying the structure of the cell membrane. It was highly effective in Gram positive S. aureus (inhibition diameter of 20mm) compared to the Gram negative bacteria (P. aureginosa and E. coli at inhibition diameters of 0 and 6 mm). Chlorox, which contains sodium hypochlorite works by unfolding and permanently aggregating vital bacterial proteins hence killing bacteria. Fabuloso is a cleaning agent without antimicrobial properties. However, it inhibited the growth of S. aureus and P. aureginosa (at inhibition diameter s of 25 mm and 36 mm respectively) by acting as a detergent and interfering with the cell membrane.
2. Each disinfectant worked as it did due to its chemical composition and interaction with the cell membranes of bacteria.
3. The disinfectants worked differently on different organisms because certain microbes such as E. coli and P. aureginosa were Gram negative while S. aureus was Gram positive. All disinfectants were effective against S. aureus because they were able to traverse the thick peptidoglycan layer of its cell wall. In addition, the disinfectants contained different active ingredients, which had different chemical properties.
4. The disinfectant of choice for use in the kitchen, laboratory or on myself would be Clorox. I would choose Clorox because it showed the largest inhibition distance in the growth of the three microbes at inhibition diameters of 55 mm 54 mm and 46 mm for E. coli, P. aureginosa and S. aureus respectively. Therefore, it would be an effective disinfectant because it would destroy an array of bacteria. In addition, it is relatively safe for human use since it contains chemicals that are used in the treatment of drinking water.
Works Cited
McDonnell, Gerald and Denver A. Russell. “Antiseptics and Disinfectants: Activity, Action, and Resistance.” Clinical Microbiology Reviews. 12.1 (1999): 147–179. Read More
Cite this document
  • APA
  • MLA
(“Disifectant lab Assignment Example | Topics and Well Written Essays - 250 words”, n.d.)
Disifectant lab Assignment Example | Topics and Well Written Essays - 250 words. Retrieved from
(Disifectant Lab Assignment Example | Topics and Well Written Essays - 250 Words)
Disifectant Lab Assignment Example | Topics and Well Written Essays - 250 Words.
“Disifectant Lab Assignment Example | Topics and Well Written Essays - 250 Words”, n.d.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document


Lab 2

...? Psychology A number of researchers have tried to expound the idea behind the working of the memory. Uncovering the principles involved in the spatial information and the working memory has been the primary goal of most of the psychologist and neurologist (Hommel, Musseler, Aschersleben & Prinz, 2001). Spatial information entails those form of information that human being encounters in his day-to-day activities. The research done by Humphreys & Riddoch (1992) reveals that the way the spatial information are perceived and perceptually organized may shape the emerging cognitive representation some time before processes of memory storage or retrieval come into play. Such information is acquired through senses. A number of theories... Psychology ...
3 Pages (750 words) Lab Report

Lab 2

...? pH Values of Common Household Items Compare and contrast acids and bases in terms of their H+ and OH- ion concentrations. All substances can be classified into acids, bases and neutral depending on their ionization trends when dissolved in water. Acids produce a greater number of H+ ions which can be explained by the fact that acids give up a H+ ion on reaction with water forming an H3O+ ion. These ions cause the litmus to turn red. Greater the concentration of H+ ions, stronger is the acid signified by the pH scale: pH of 1 being the most acidic and 7 being neutral. For bases, number of generated OH- is greater than H+. These, on reaction with water, gain a hydrogen ion leaving behind an OH- ion. Bases cause the litmus to turn... pH Values ...
5 Pages (1250 words) Essay

Lab #8 and Lab #11

...Lab #4 Lesson 8 Reflection Paper Details of the Participants Participant Age Gender Recognition Test A 33 M 17 2 B 30 F 13 3 C 54 F 10 4 D 63 M 8 The four participants that were chosen for this were selected all at once. Three are family members and one is a significant other. Before asking them to participate in the experiment, I decided to warm them up with friendly conversation. Then, I asked them to participate, they were informed of the requirements, and I had them sign the informed consent forms. They completely understood the instructions, so there was no need to go into deep detail regarding the experiment. They were also friendly and eager to participate. They supported studies such as the one we were undertaking...
6 Pages (1500 words) Assignment


... Procedure This experiment requires three cuvettes, a spectrophotometer, a graduated cylinder, dye of three differentcolours. The first step is to fill the three cuvettes with red dye, green dye and blue dye with each holding a dye of different colour. The initial concentrations of these dye is 100% at the beginning of the experiment. The cuvettes are then placed into a spectrophotometer. They are oriented in such a way that their smooth sides lining face the light source to enable easy penetration of light through them. Multiple trials were then performed because the spectrophotometer can only measure one sample at a time. In order to ensure accuracy and precision, it was necessary to re-calibrate the spectrophotometer three... Procedure...
1 Pages (250 words) Essay


... Due Visiting the Michigan Museum: LAB Room: The First People (Michigan’s First People When did the first people arrive in Michigan? Where did they come from? Discuss the resources which were most significant to them. The majority of the origins of people in Michigan are Native American; which arrived between 12,000 and 14,000 years ago. These Paleo-Indian peoples traveled from Alaska and Asia across the Bering Straits. The most important resources to these peoples were the herds of caribou, mastodons, and mammoths; they relied upon these animals for food and furs for clothing. Room: Lumbering (The History of Lumbering) 2. Back in the 19th century, Michigan forests became the resource on which the lumbering industry was dependent...
2 Pages (500 words) Essay


...WiFi Hot Spot of WiFi Hot Spot Before starting this there are few things should be checked that are. Either of the type (Desktop / Laptop) of the system it must have wireless LAN card installed. For wireless hotspot we need a wireless connection to be free from use and wired LAN connection to be connected. We will use that wired LAN connection to share the connection wirelessly with others. Keep this noted that some work network do not allow connection sharing because of group policies defined by the network engineers. Step 1: We shall start working by going into the Network and Sharing Center via Control Panel; it can also be quickly accessed by right-clicking on the network icon in the system tray. Once we are there, we... Hot Spot of WiFi ...
2 Pages (500 words) Lab Report


... Experiment #3 — observing the Moon’s Phases Objective To determine the relationship of the Earth, Moon and Sun as the Moon orbits the Earth. Introduction In astronomy, determining the relative position of the moon, the sun and the Earth requires the study of phases of the moon at different days of observation. In which case, complete cycle through the phases called lunar month gives the synodic month, always around 29 days. The lab report studied these phenomena to realize moon’s position in relation to the other two. Procedure The moon was observed and a dark part was shaded to show how the moon would look like at each point from the Earth. Each phases of the moon was labeled and presented in diagram forms as shown in the result...
1 Pages (250 words) Essay


...Discussion In the test for the engine parameters, it was found out that the temperature changes for ambient temperature, and fuel in the engine increased with time. On the other hand, the temperatures for oil output, the exhaust, cooler in the engine, the cooler output and the oil input decrease with time. The results recorded were used to calculate for the derived values such that torque was obtained as 72.7 N/M and ranges between 72.1 N/M - 72.7 N/M, the brake power was obtained to be in the range 40987.46667 KW - 8370.193333 KW, the brake thermal efficiency was calculated to be 32% and ranges between 23.4 % - 32.4 %. Finally the volumetric efficiency was found to be 60%. It is important to point out that the torque... In the test for the...
2 Pages (500 words) Lab Report


... Lab It is crucial to familiarize with various concepts before conducting lab experiments. One of the importantconcepts for this experiment is solubility, which can be defined as the ability of a substance (solute) to dissolve in another (solvent) (Bauer et al. 216). The estimation maximum quantity of a substance that dissolves in a solvent at equilibrium yields solubility (Brown et al. 120). Qualitative analysis is done to identify elements in the sample used for the experiment. For this experiment, qualitative analysis was employed to establish whether or not a precipitate would form upon adding some acids and bases. A flow chart was used to distinguish between cations in the resultant solution. A flow chart refers to a diagrammatic...
1 Pages (250 words) Essay


... Should this Ore be mined Introduction Prior to working on the lab experiment, various perceptions should be comprehended such asspectroscopy method utilized in the lab. Calorimeter also known as spectrometer is a tool that is used in figuring out the quantity of light that a given solution absorbs while using various wavelengths (λ).The spectrometer cannot determine the quantity of light absorbed(A) by certain solution unless calibration is done first. The opposite of Transmittance (T %) is Absorbance (A) which can be defined as the quantity of light that is absorbed or transmitted through a sample. Moreover, a highly concentrated solution is, the more it absorbs light, and the less transmitted light through the solution is. This also...
2 Pages (500 words) Essay
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Assignment on topic Disifectant lab for FREE!

Contact Us