From this research and literature the expected results of the experiment were to see an increase in membrane permeability, this result was observed. The study provides a brief insight into what kind of effects alcohol can have on cell membranes but it is limited. The results can be used to understand more practical applications, like human cells for example. the experiment is ineffective way of observing the effect of alcohol on cell membranes and is a good education tool. The study is
As mentioned in number 13, the data for the melting point makes sense because my pure product and given compound almost perfectly matched. 17. Again as explained in number 14, the TLC data made sense because my pure compound and 4-tert-butylbenzyl phenol had similar distances from the solvent origin of the plate. The presence of benzyl bromide and benzyl alcohol also explains how not all the product dissolved in the filtrate. The possible explanations and changes to make are similar to the previous questions.
Concepts learned include molar ratio calculation, and ester constituents (carboxylate acid and alcohol). In addition, the use of a cold finger condenser and its purpose in ester reactions was discovered. The effects of drierite on reactions and its ability to absorb water was also studied. Concepts of stoichiometry were reviewed from previous classes, and integrated into this lab experiment as well. Citations: Thorne, E. J.
Some factors that could have affected the experiments end result could have been through measuring the all the reactants and equipment their might have been an error somewhere there. Another factor that could have been is that the vinegar was a lower concentrated acetic acid and could have other components in it as well which could have ruined the end measurement of the final product by getting a heavier measurement that actually
Water is more precious than oil. It’s that simple” (Wheeler). After the nation concludes fracking, America can perhaps continue researching possible ways to extract the oils. The process of fracking offers several benefits to our nation, but not at the expense of the environment and human lives. By researching ways to avoid the waste getting into aquifers or causing earthquakes the process can eventually reap the benefits.
These raw oils contains impurities that have a bad flavour or odor. Fractional distillation is used to remove or reduce impurities. Solvent recycling and solvent purification is another area where fractional distillation technology is applied. Industry and laboratories use large amount of solvents. Used solvents contain contaminants that can be removed by fractional distillation.
Then, tests are performed to determine if the products of aerobic and anaerobic respiration are present in the flasks.The citric acid cycle consists of a series of chemical reactions used by all aerobic organisms to release stored energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins into carbon dioxide and chemical energy in the form of ATP (Biology). The tests detect the presence of carbon dioxide and ethanol. Carbon dioxide should be present irrespective of the type of respiration taking place, but ethanol is present only if fermentation has occurred. Another factor that can indicate whether fermentation occurred or cellular respiration occurred is the amount of glucose utilized during incubation.Fermentation uses more glucose because the process of fermentation is much less efficient than cellular respiration in terms of energy production per molecule of glucose used. The open flask (control) and the closed
A slight error in the indicator can shift the endpoint and consequently affects the volume of the obtained NaOH. Lastly, the final source of error of this experiment is misjudging the color of the indicator near the endpoint. The color change is very intricate that even a small amount of the standard solution can produce different shades of the color. With these uncertainties, a 23.3 % error was committed given that the theoretical molar concentration of acetic acid in the the vinegar sample is
Credibility allows the researcher to verify their interpretations and accuracy of their perspective by returning for further interviews with the participants (LoBiondo-Wood & Haber, 2014, p. 126). Credibility also refers to how believable the research findings are or the true value of the study. The additional interviews following the examination of data analysis will broaden the study’s credibility. Auditability is the participant showing accountability of the information provided and the transfer of raw data into research findings (LoBiondo-Wood & Haber, 2014, p. 126). During this study, a detailed description of the participants’ personal experience, environment, and circumstances will be given in a way that others can
A vital "knowledge gap" is addressed in this experiment, that is to study the effect of stimulants and depressants, such as ethanol, melatonin, epinephrine, and dopamine on HR, individually and in a mixture. Said depressant and stimulant chemicals were administered to daphnia individually and afterwards, in combinations. The motivation for research in this area was to explore whether two select depressants or stimulants when administered together have a synergistic, antagonistic or no effect on HR. Data was determined in the form of Beats Per Minute (BPM). The data was analyzed by plotting the calculated BPM for each test solution from each daphnia.
With consistent data, we were able to conclude that protein carbonylation transpired in treatment groups of cigarette smoke and acrolein exposure. However, differential quantity in protein carbonylation between controls and treated groups is still to be investigated. Other lab techniques include sterile technique, MTT toxicity testing, ELISA (indirect), maintenance of tissue culture, western blot, protein extraction, column chromatography, and mass
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Marijuana could also be used for health reasons. Marijuana studies have shown that it can decrease anxiety, decrease the progression of Alzheimer 's disease, and stop the spreading of cancer. If it can help our health then that could be a factor on legalizing it. Connecticut legalized cannabis usage for medical purposes why not let it be for recreational use. It should also release stress and could be useful to people that are dealing with depression.