Fleischmann's Rapid-Rise Yeast

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Under anaerobic conditions, alcoholic fermentation occurs in Fleischmann’s Rapid-Rise yeast (Saccharomyces cerevisiae). During glycolysis, glucose is converted to two pyruvate; consequently, the end products are two ATP molecules from substrate level phosphorylation and two NADH molecules. Then, NAD+ regeneration occurs, first converting two pyruvate to two acetaldehyde while also releasing two carbon dioxide molecules, and ultimately two acetaldehyde converting to the end product of two ethanol with the regeneration of two NAD+. It is important to indicate that the alcoholic fermentation process can be applied to the use of ethanol as biofuel. With this in mind, ethanol biofuel is expected to produce lower levels of pollution with the use…show more content…
In this experiment, one tested solutions that consisted of the standard yeast solution and added raw materials of interest. First, one measured and then added seven grams of Fleischmann 's Rapid-Rise yeast to a bottle containing two hundred and fifty milliliters of warm distilled water for the purposes of creating the standard yeast solution that was used in the fermentation experiment. Next, the standard yeast solution was added to each of the four fermentation flasks. After swirling the bottle, one and a half grams of the fermentation substrate was added into a beaker with fifteen milliliters of yeast suspension. The fermentation flask marked one required one and a half grams of Zulka Brand Morena Pure Cane Sugar as the fermentation substrate, the fermentation flask marked two required one and a half grams of Maseca Brand Corn Flour as the fermentation substrate, the fermentation flask marked three required one and a half grams of Carolina Biologicals Glucose as the fermentation substrate, and the fermentation flask marked four required one and a half grams of distilled water as the fermentation substrate. Then, the opening of each fermentation flask was covered with parafilm and one proceeded to gently mix the solutions. The part of the fermentation flask with calibration marks must be filled with the yeast suspension so that there is no empty space. Next, one placed the fermentation flasks in the water bath and recorded the carbon dioxide volume readings after the…show more content…
In addition, raw sugarcane is a common biofuel that is used as an advantageous renewable energy; however, the greenhouse gas emissions are higher than that of corn (Renouf et al., 2008). The major disadvantage to the use of corn for ethanol fuel production was that starch must be converted to sugar and then converted to ethanol at a slower rate than sugarcane; however, the benefit to using corn was that there was lower carbon dioxide and greenhouse gas emissions than that of sugarcane. Although sugarcane would be more efficient in ethanol production, the environment in the United States favors growing agricultural crops such as corn, instead of sugarcane. The positives to using sugarcane for ethanol fuel production in Brazil include the estimated 19 billion liters of ethanol that were produced in 2007, its expansive territory, and the availability of water (Martinelli et al., 2008). On the other hand, the cons of using sugarcane for ethanol fuel production in Brazil include environmental degradation and the accumulation of carbon dioxide in the atmosphere (Martinelli et al., 2008). For regions in the United States of America that produce sugarcane, biofuel sources are more evenly distributed so it provides a security of supply domestically (Hahn-Hägerdal et al., 2006). As a result, the production of ethanol fuel from corn instead of sugarcane became a desirable source of renewable energy in the United States of America large in part due to lower greenhouse gas

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