The And Chemical Kill Off Bacteria

Microchemlab.com states that a zone of inhibition is a qualitative method used clinically to measure antibiotic resistance and industrially to test the ability of solids and textiles to inhibit microbial growth. Researchers who develop antimicrobial textiles, surfaces, and liquids use this test as a quick and easy way to measure and compare levels of inhibitory activity (“Zone of Inhibition Test for Antimicrobial Activity”). The control of the experiment is distilled water. The independent variable is the different house cleaning products, and the dependant variable is the amount of growth or decline in the bacteria. Time, temperature, and amount of household household item are all constants in this experiment. Time needs to remain the same for all the products because time affects how well the bacteria grows. The temperature is required to stay the same as well because it can directly manipulate the rate of growth in the bacteria, and large amounts of the household item can offset the bacteria’s growth as

Purpose: The purpose of this experiment is to observe chemical changes in common consumer products to determine if the chemicals are basic, acidic, or remain neutral when mixed with other chemicals.

THE EFFECT OF INCREASING THE CONCENTRATION OF DETTOL ANTISEPTIC LIQUID ON THE GROWTH OF E.COLI

This experiment illustrates the importance of handwashing and proves that hand washing is worth it. Since our hands are constantly coming into contact with ourselves and others, touching surfaces, grabbing objects, being sneezed into, etc., keeping our hands clean is one of the most effective, yet simple way we can take to avoid getting sick and spreading germs to others. Many diseases and conditions are spread by not washing hands with soap and clean, running warm water. “The human skin is a host to anywhere between 10,000-10,000,000 bacteria per square centimeter and since health care providers come into contact with pathogenic bacteria by being engaged in patient care, hand washing can reduce the risk of spreading diseases (page 3).” The objective of the experiment is to test the effectiveness of hand washing and demonstrate normal flora. This report presents the procedures and materials for the experiment, the experiment's results, and an analysis of those results.

coli, followed by the vinegar, then salty water is proven to be incorrect. The Ajax killed more E. coli and prevented it from returning but the vinegar had a much larger and more effective zone of inhibition, even though it was faint and not properly killed. Different substances were chosen so that the effectiveness could be tested and comparisons made.

The antibiotics will have different zones of inhibition on different bacteria. Also, a range of concentrations of the nutrients in the bacteria will change the bacterial growth.

Out of the all the antiseptics being used in this investigation the more well known antiseptics such as dettol and sudocrem will be more effective when stopping the growth of bacteria than natural antiseptics like lemon.

5) My hypothesis: “The higher the concentration of antiseptic, the more powerful it will be at inhibiting/ killing microorganisms which cause bacterial growth.” This theory supports my result because as you can see the zone of inhibition increases due to the increasing concentration of antiseptic. The higher concentration of antiseptic means it has been less diluted, which means its more stronger than other more diluted concentrations, this high concentration will determine how powerful the antiseptic will be at killing/inhibiting the growth of bacterium, this high concentration of antiseptic will break down the bacterial cell wall, after this process has happened the antiseptic can stop the mutation of the bacteria and inhibit the

Antibiotics like ciprofloxacin and doxycycline kill the bacteria or inhibit growth of the bacteria that causes eventual death.

The hypothesis was not supported because rubbing alcohol did not proved to be the household item with the largest zone of inhibition. Starting with the largest zone of inhibition and ending with the smallest, Betadine was the largest, then the Lysol cleanser, liquid hand soap, rubbing alcohol, Neosporin, Germ-X, and the smallest was the distilled water. Betadine had the largest zone of inhibition of 39.5mm and rubbing alcohol which does not have the largest zone of inhibition of 17.7mm, which rejects the hypothesis. Betadine had the largest zone of inhibition because the active ingredient was povidone-iodine. Povidone-iodine kills eukaryotic and prokaryotic cells and is an antiseptic. It penetrates the cell wall quickly and disrupts proteins

I think the bleach will be most effective in killing the germs because it is the strongest substance and the water will be least effective because it is the weakest substance.

This study will include several quasi- randomized and randomized studies. The studies that consists random participants, large sample size and test measures that assesses the infection rates will be shortlisted for this study to make it reliable. Trevillion (2008) in his study claimed that the varying degrees of wound cases that came in the emergency department were cleaned better using tap water than normal saline or other cleaning solutions. He concluded that tap water effectively reduces the infection rates, is cheaper, and can be easily used by the patients to clean their wounds at home. Moscati et al. (2007), in their study chose random population with wound in the emergency rooms and divided the population in two groups of which few were subjected to cleansing by sterile saline (200ml) with splash shield and the others by irrigating their wounds under normal tap water for 2 min. After 5- 14 days, they found a difference of 0.7% of infection rates in both groups, which was not significant concluding that tap water and sterile saline were both safe for treating wound. Bee et al. (2009) evaluated the effectiveness of the cleansing solutions by reviewing 7 out of 9 selected articles including both randomized and quasi-randomized experimental studies based on their reliability. They found no significant difference in the infection rates when used either of the solutions (tap water vs. sterile saline) for treating wounds. However, after assessing 4 randomized study, they concluded that saline enables effective wound healing while the tap water was effective for irrigation and debridement if used appropriately. Salami et al (2006) conducted wound healing experiments on rats with 2x2 cm full thickness wound on their dorso-ventral flanks, which were treated with chlorhexidine, tap water or saline. They

Bacteria is everywhere, and since bacteria is considered as germs, these germs can get people sick. Therefore, what is the best way to kill bacteria? Instead, of using regular disinfecting wipes, I chose 91% Isopropyl alcohol; it’s less expensive than the common disinfecting wipes. It most likely kills bacteria by “kill[ing] cells by denaturing cell proteins and DNA, interfering with cellular metabolism, and dissolving cell lipo-protein membranes” (PubChem Compound Database). In other words, alcohol kills bacteria by first making the outer cell membrane lipids more soluble in water, which makes the cell lose its structure and fall apart. While the cell membrane is disintegrating, the alcohol is allowed enter and denature the proteins within

The Manuka honey itself is produced from the perennial flowers of either Leptospermum scoparium or Leptospermum polygalifolium. The former is often referred to as the “Manuka tree” (ref) and is common

Germs and bacteria are everywhere in our households: on the kitchen counter, toilet seat, telephone, pillowcases, door knobs, TV remote controls and many other places that one would least expect. Almost every household uses bleach products to clean, with the aim of getting rid of the bacteria – bleach is a highly effective disinfectant, it not only cleans up dirt and mold but it also kills some of the most dangerous bacteria as well as viruses. The aim of this One Research Task was to find out which of South Africa’s best-selling bleach brands work the best (kill the most bacteria) but the purpose of this review is to examine bleach as a whole product – looking at the pros and cons of using bleach, its effectiveness on households as well as some experiments that have been done relating to