A structural interpretation of the acidity of groups associated with the hemes of hemoglobin and hemoglobin derivatives

Since the discovery by Bohr and coworkers in 1904 of the effect of acidity on the oxygen equilibrium of hemoglobin, there have been a large number of investigations directed towards clarification of the physicochemical relationships of acid groups with the hemes in hemoglobin and its derivatives. It is the purpose of this paper to analyze modern quantitative data, including those for ferrihemoglobin (methemoglobin), in order to throw new light on the general problem, to establish the ionization constant of an acid group in ferrihemoglobin previously unrecognized, and to give a structural interpretation of shifts in the pK of groups caused by changing chemical environment

Crater deflection studies

Deflection of model lunar surface wheeled vehicle by lunar crater

How Well Do Students Perform on A Five-Paragraph Analysis Essay When Writing Digitally Versus Handwritten?

Technology use in the secondary education setting has been increasing since the early 2000s, but with the coronavirus pandemic in 2020, when students learned remotely, technology use exponentially increased. Many districts provided devices for their students to continue their schoolwork. As we return to the classroom, should assignments remain technology-based or return to handwritten assignments? In this study, the researcher focused on identifying whether handwritten work or typing is more effective when developing a five-paragraph analysis essay in a ninth-grade classroom. Students were given the same curriculum throughout the study, but one group was given the curriculum through worksheets to focus on handwritten work, while the other group was given their assignments digitally and was able to type the information. The results are shown using an independent Mann-Whitney U test to compare the students’ five-paragraph analysis essay scores

Partisanship and Special Interest Influence on Environmental Policy as Illustrated through Statewide Plastic Bag Policies

Prior to its advent in 1869, the world had zero plastic. In 1907, when a fully synthetic version of the polymer we now call plastic was invented, humans reveled in the idea that they were no longer constrained by the limits of what natural resources could provide. Through World War II, the uses for plastic grew exponentially, continuing post-war as a seemingly endless number of plastic products became available to the public (Science History Institute). Demand for this material has not subsided since, and it is now estimated that 300 million tons of plastic are created annually (Paco, 2017). Much of this ends up in the ocean, where an estimated garbage truck load of plastic enters the ocean every minute. By 2050, that number will quadruple, and there will be more plastic in the ocean than fish (Caverly, 2019). When plastic makes it to a landfill, it takes hundreds of years to decompose (State Legislature, 2007). Many cling to the concept of recycling as a means of managing this waste stream. However, only nine percent of plastic waste is recycled (Caverly, 2019), and this number is going down. Recycling is not a solution to plastic waste, and not only because people are not choosing to recycle. There is more plastic waste that is captured with the intention of recycling it than can actually be recycled. Up until 2017, China was receiving 45 percent of the world’s plastic waste (106 million metric tons since 1992). However, this resulted in China polluting the air so severely that they enacted their National Sword policy and halted acceptance of nearly all plastic from other nations due to human health and pollution concerns. The United States was one of the top exporters of plastic to China and now must send its cargo ships filled with plastic to other countries, none of which can take on the amount China had been accepting, resulting in even more plastic entering landfills (Watson, 2018)

Confederate Daughters: Coming of Age During the Civil War

Gender and the Confederacy At the beginning of the best-known rendition of a Southern belle, Gone with the Wind, Scarlett O\u27Hara declares to her visitors, the Tarleton twins, that if they don\u27t stop going on and on about the impending war, she will go into the house and leave the...

The Evolution of a Humanistic Teacher

This paper traces my growth in becoming a humanistic teacher. It is essentially an introspective study high­ lighting the teaching and learning experiences I have had over the last few years and how those experiences have affected my current teaching. This paper is divided into six chapters: an Introduction, My Teaching History, The Evolution Intensifies, My Teaching Intensifies, a Conclusion, and lastly, an Addendum

Grant and Twain: The Story of a Friendship that Changed America

Nurses and Little Women A novel of Barton and Alcott Patricia O\u27Brien follows up her study on real women\u27s friendships in I Know Just What You Mean with this close examination of a 19th-century fictional friendship in a new novel, The Glory Cloak. O\u27Brien places ...

Caregivers: Reasons for Support Group Attendance

This study examined the self-reported reasons informal caregivers of frail persons 65-+ attend time-limited psychoeducational support groups. Results indicated that caregivers in this study attended support groups for practical information (community resources), relief of emotional stress, and skill development. Results also indicated that caregivers of spouses attended the support groups for different reasons than did caregivers of non-spouses. Caregivers of non-spouses tended to be experiencing more emotional strain and anger, and were receiving less emotional support from friends and relatives. Limitations of this study included small sample size, lack of variance in geographic location of the support groups, and lack of representation of diverse ethnic cultures. Additional study is required to further explore this area of research