Lesson Critique Essay Example | Topics and Well Written Essays - 500 words

Lesson Critique - Essay Example The lesson plan identifies national health education standards which it adopts from the National academy of sciences and the Mid-continent Research for Education and Learning (McREL). The one national standard that this lesson plan addresses from the National academy of sciences is that of science in personal and social perspective by emphasizing concern on personal and community health. The others which it addresses from the Mid-continent Research for Education and Learning are: knowing how to maintain and promote personal health; knowing essential concepts about prevention and control of disease and understanding the fundamental concepts of growth and development (California & California, 2009). The lesson plan provides an elaborately detailed list of procedures to be followed by the learner and this constitutes mastery. These engage the learner in discussions as well as analysis of foods high in nutrients and creation of food diaries. The lesson plan, however, does not provide rationale for action. Despite its failure to do so, from the procedures which are developed to take the learner through the learning process through the lesson, one can see that collaboration is enhanced through group work, communication through discussion, and critical and creative thinking is addressed through devising of personalized MyPyramid plan. The materials provided by the lesson plan include My Pyramid: Simple Steps to Healthy Living, computers which have internet access and printers. Their use is integrated in the procedures which are meant to effect learning in the learner. The lesson is planned in such a way that it is learner-centered. The activities of understanding the concepts on good nutrition and those related to it are planned in a step by step procedure to help the learner understand the concept effectively. Discussions and group works form the

Module 3 SLP - microbial metabolic and environmental growth Essay

Module 3 SLP - microbial metabolic and environmental growth - Essay Example Different microbial species present varying degrees of thermal stability of its proteins and enzymes (Brooks et al., 2007). Hence, microorganisms display different temperature ranges that are optimal for their growth and metabolism. Those organisms which grow best at low temperatures (15-20 OC) are called psychrophiles. Mesophylic groups grow best at 30-37 OC while thermophilic forms grow best at a temperature range of 50-60 OC. According to a study conducted by Radke-Mitchell and Sandine (1986), L. bulgaricus has an optimum growth temperature range of 43-46 OC. On the other hand, E coli grows best at 37 OC, similar to the normal body temperature (Don, 2008). This is not surprising because E. coli forms a part of the body’s normal bacterial flora (Don, 2008). The significance of maintaining a certain range of pH for bacterial metabolism and growth is demonstrated by the fact that hydrogen ion concentration influences the integrity and functions of proteins, and other biochemical processes (Campbell and Reece, 2004). The acidity and alkalinity of the environment also affects the availability of nutrients essential for the growth of microorganisms. Those species that grow best at a pH range of 6.0-8.0 are called neutralophiles. Meanwhile, microorganisms with optimum pH growth of 3.0 or lower are classified as acidophiles while those with optima at a pH of 10.5 or higher are called alkaliphiles (Brooks et al., 2007). Beal et al. (2009) reported that L. bulgaricus achieve its highest biomass in culture when maintained at pH 5.0. Cell viability was also noted to be at its peak at pH 5.0 (Beal et al., 2009). On the other hand, the optimum pH for growth of E. coli is 6.0-8.0 (York et al., 1984). The process of energy production, termed respiration, operates by virtue of electron acceptors. Oxygen serves as an electron acceptor in bacterial respiration (Brooks et al., 20097). Organisms which strictly require oxygen for its