Determining the Effectiveness of a Food Preservative (THIS IS A CASE Essay

Determining the Effectiveness of a Food Preservative (THIS IS A CASE STUDY) - Essay Example Direct microscopic counts cannot distinguish between dead and living bacteria. Dead bacteria result from the fact that the â€Å"natural environments [for bacteria] do not always resemble standard laboratory culture media† (Roszak & Colwell, 1987). Hence, death of some bacteria is expected. Standard plate counts may not be able to differentiate among the different types of bacteria but is reliable when it comes to giving information about disease-causing bacteria such as Pseudomonas aeruginosa (â€Å"Swimming Pool,† 2010). Identifying the growth and metabolism of organisms such as P. aeruginosa in cottage cheese can give insights on how effective a preservative is or, more specifically, how long it will last in protecting the cheese from bacteria. Moreover, standard plate counts seem to be the method of choice when it comes to experiments with cottage cheese, as long as the laboratory environment and all other variables are properly regulated (Fedio et al., 1994). Another thing is that, P. aeruginosa forms three colony types – a small and rough one, one with a fried-egg appearance, and one with a mucoid appearance (Todar, 2011). Due to such differences in colonies, the number of bacteria will therefore obviously be relatively hard to determine through a d irect microscopic count and hence will require a standard plate count. Besides, a standard plate count is appropriate for counting colony-forming bacteria (Todar, 2009). Turbidity measurements, just like direct microscopic counts, may fail to give an accurate bacterial count because it â€Å"cannot detect cell densities less than 107 cells per ml† (Todar, 2009). This means that colonies must have approximately at least 10,000,000 cells before it can be detected through turbidity measurements. Considering that colonies of P. aeruginosa are varied in many aspects like appearance, it is possible to obtain samples where colonies would have cells less than the minimum limit that can be detected

Men--Its in their nature Essay Example | Topics and Well Written Essays - 750 words

Men--Its in their nature - Essay Example Conversely, women had a tendency to to be watchful so that they could preserve, maintain, care and nurture their families. Men seem to be risk takers be it professionally or romantically and even in the recreational events, they take part in (Roeser 1039). This goes to explain why it is mostly men that are involved in extreme sports such as car racing, sky diving, rock climbing, just to name a few. It is very common to see men as the centre point of uploaded videos that show, for the lack of a better word, stupid stunts such as car surfing. Exactly as the name describes, it involves a driver climbing and then standing on top of a car as it is being driven and of course not to forgetting to mention the antics displayed on the hilarious but painful to watch two jackass movies. Many men have reported that they generally take risks because it is fun, and this explains why they will be involved in risky past time behaviors. This does not imply that women do not have fun as well, but their idea of fun is less risky. It is also common to observe a man racing his car against a fellow driver on the road, not because it is a rally event but simply because they want to show off or protect their ego (Roeser, 1040). When a male driver is overtaken by another car on the road, chances are that he will step on the accelerator and try to reclaim his glory by overtaking the said driver. This in turn ends up as cycle that will only come to an end when one of the drivers concedes defeat or has to go his separate way. As weird and ridiculous as it may sound, risk taking is a part of men’s way of impressing women. In the presence of a woman, a man who is say, involved in a sport will perform a riskier stunt to show off and impress the ladies. When they know that women are watching, men tend to take up more risky behavior than they normally would. In addition, it is in the nature of men to be polygamous, that every man is unfaithful or will be at some point in his life despite how good he seems. Over the years, it seems like it has been the norm, marriages breaking up due to infidelity. It would be unfair to make it seem as if women are always the victims but statistics show that more men than women tend to stray in relationships. Many reasons have been given as to why this is the case, with some dating as far as the biblical times. During the earlier centuries, before Christ that is, men had more than one wife and it was widely accepted. A famous case is of King Solomon, who had more than seven hundred wives and one thousand concubines. How does one man handle all these women? Even in Africa, many households still embrace polygamy. It is only recently that men have started to shed the one man, many wives attire. Nowadays, after moving from the polygamy scenario, it seems that most men are now taking up unfaithfulness. Many times the statement that men are unfaithful by nature has been used, that they are like animals and will stray, although, it would b e unfair to generalize that all men are unfaithful. It is important to consider that there are natural reasons or some genetic coding that makes a man lust after more than one woman. Furthermore, men are by nature sexual creatures who are easily visually stimulated, thus man might be happily married or in a relationship,