Research in my laboratory is comparative in approach. We study a wide range of primate species gorillas, orangutans, Old and New World monkeys, prosimians in "naturalistic" environments, at the Toronto Zoo and other zoos across North America. We are also involved in several projects looking at reproductive behavior in endangered species, including cheetahs, elephants, rhinos, Vancouver Island marmots, and black-footed ferrets. My research interests center on the cognitive mechanisms involved in foraging behaviour.
Draft Two The Effects of pH on Yeast Fermentation "Yeast fermentation is a way of harvesting chemical energy that does not require oxygen" 1.
Fermentation in general is anaerobic respiration, meaning it does not use oxygen to produce energy2. This is why anaerobic respiration is not as effective as aerobic respiration, which requires oxygen.
This keeps it from properly binding with the substrates it needs to break down or combine. Usually, yeast enzymes can function in water which has a neutral pH, or in slightly acidic solutions, in pH Enzymes are an important part of cellular respiration and help create many intermediates, or compounds formed along the metabolic pathway of cellular respiration.
Without these intermediates, cellular respiration would never fully finish and produce ATP Adenosine Triphosphateenergy for the cell. However, yeast is a facultative anaerobe, and will prefers the more efficient aerobic respiration, which produces more ATP than anaerobic respiration, which produces less ATP.
Basically, when yeast, in this case, saccharomyces cerevisiae, ferments or breaks down sucrose, it releases carbon dioxide and possibly alcohol alcoholic fermentation depending on whether or not oxygen is available.
Experiments have been performed in which a balloon is placed on top of a vial. Carbon dioxide will float to the top of the vial. The balloons will capture all the carbon dioxide being released.
The size of these balloons will vary depending on how quickly and how much the saccharomyces cerevisiae can ferment in a given time. Therefore, by comparing the size of these balloons, one can tell which pH level is more suitable for saccharomyces cerevisiae and would provide the optimum environment for fermentation of sucrose with this kind of yeast.
This may possibly also slow the breakdown of sucrose, possibly slowing carbon dioxide release, or bringing it to a stop.
According to research, the vial with a pH of should have released the most carbon dioxide because the optimum pH level for yeasts is mildly acidic to neutral. One possible explanation for this being the optimum pH for yeasts is that yeasts are facultative anaerobes, which when given oxygen will prefer to use aerobic respiration over alcoholic fermentation, which in its oxidative phosphorylation stage involves the pumping of Hydrogen ions to produce ATP.
Acids have a lot of Hydrogen ions. Perhaps, this is in some way associated to the reason why slightly acidic environments are best for yeasts, Cited References 1.
Stephanie Vargas Does the essay have at least 10 superscript notations in the text of the paper? No Do these superscripts correspond to the Reference List that appears after the text of the essay? No Is the numbering of the superscripts sequential 1,2,3,4,5, etc in the Reference List?
No Is the numbering of the superscripts properly sequential and repeated in text? No Were at least 2 science journals used? Were they listed correctly? Was the introduction interesting?
Was the thesis stated well? Somewhat Did the essay make sense? Yes Was the essay written well? Was it interesting to read or was it boring?
It was sort of interesting What suggestions do you have to further explain the scientific concept? Especially the conclusion, too wordy. Also, the abstract seemed to focus on the steps of the procedure rather the experiment as a whole. Also, an abstract is not needed.
Put it in essay format, not separated by abstract, introduction, and conclusion. Did your partner describe the scientific concept well enough for you to understand it? Yes Was the essay written with an academic voice? Yes Was the CSE formatting done well? The Effects of pH on Yeast Fermentation Abstract This experiment is the study of how different pH levels affect the rate at which 2g of the yeast, saccharomyces cerevisiae, ferments 30 mL of sucrose in a vial.
The hypothesis include the hypothesis in the introduction is if the saccharomyces cerevisiae is allowed to ferment sucrose in lukewarm water with pHthen it will release more carbon dioxide than the saccharomyces cerevisiae yeast allowed to ferment the sucrose in lukewarm water with pH As a cat-owner, it’s only a matter of time before you discover that your precious pet has left you an unpleasant surprise somewhere on the floor, usually not too far from his litter box.
In this thesis, we will study several domination parameters of a family of graphs known as complementary prisms.
We will first present the basic terminology and definitions necessary to understand the topic. Then, we will examine the known results addressing the domination number and the total domination number of complementary prisms.
After this, we will present our main results, namely. Departmental seminars are open to the public and are streamed live and recorded for later viewing.
Amanda Desormeaux (School of Natural Resources and Environment – Interdisciplinary Ecology, Thesis/Dissertation Defenses, Qualifying Exams, and Oral Final Exams are open to interested faculty, staff, and students, and are announced at.
The Black Plague By: Daniel Clavijo Sarah Murray Carolina Ribeiro Lisette Tellez Bibliography "Plague Mask (Medical History)." Alchemipedia. N.p., 9 Feb. Without a thesis, Gabrielle hangs on its talented actors, who deserve much better than any of this; it’s a detail oriented movie that glosses almost entirely over all of its details without any subtlety whatsoever.
Desormeaux, A. Water Conservation as an Effective Strategy to Manage Increased Water Water Conservation as an Effective Strategy to Manage Increased Water Demands in Volusia County, Florida.