Crystal structure

The fight to discover the structure of deoxyribonucleic acid continues in James Watson’s The Double Helix. Linus Pauling thought he had discovered the structure of the acid, but in fact he had come with an incorrect structure that did not represent an acid at all. The basis of Pauling’s model consisted of a three-chain helix in which the sugar-phosphate backbone resided in the center of the molecule. The phosphate groups in this theoretical structure were not ionized. Instead, each phosphate…

This relies on selective crystallization which is a result of the fact that large crystals are more stable than smaller ones. In addition to being more stable, the larger crystal is also more thermodynamically favorable because more stability correlates to a lower energy. This experiment also relies on the fact that individual enantiomers crystallize together in a single R or S crystal which is entirely up to luck. However, in the case of protein building is more favorable for amino…

The use of language is necessary for effective communication. As Gee and Hayes define, language is a ‘cognitive function’ as well as a ‘set of social conventions’, and can be considered a physical entity (2011, p. 6). Humans experience many diverse situations and settings, daily, in which language is needed. In these varying circumstances, differing expectations, demands, and understandings are placed on the language that is employed. Due to these differing situations people will employ…

Sirtuins and Histone deactylases (HDACs) Eukaryotic DNA is packed in a high level structure called chromatin, resulting from the assembly of an elementary unit, the nucleosome, and an octameric structure obtained from eight proteins called histones [1]. Histone deacetylation is a reversible process whereby histone and non-histone protein transfer the acetyl moiety from acetyl co-enzyme A (CoA) to lysines while histone acetylation is the direct opposite process whereby acetyl groups are removed…

Structure/Boundaries Systems perspective views individual behavior as the outcome of mutual interactions within multiple environments (Nichols, 2014). These multiple environments or systems may include family; school, work, communities and all parts are interconnected (Nichols, 2014). As in all social systems, family systems are structures of interdependent people that share patterns of behavior (Nichols, 2014). Transactions are interactions that occur in family systems between family members…

point. The pure aspirin product that was formed in this experiment which had a chemical yield of 54.3% and had a melting point range of 117.8-125.2C. Chemical Synthesis is a process that starts with a simple structure, which then breaks and forms new bonds in order to create a new complex structure.…

Team/Project Structure It was an interesting learning experience completing the group research project. I was fortunate enough to choose my own group. My group (Trisha Grahmann, Amanda Rodriguez, Crystal Powell, and Danielle Pardo) chose the topic of “First Impressions”; initially, this topic was the main reason why I chose to be in their group. The secondary reason was that the group members appeared to be very intellectual and insightful. Individually, we were able to choose a specific…

“Language variation means that a given language like English is not one uniform and homogeneous system, but that it contains many, slightly or strongly diverging subsystems or varieties.” (Dirven 2004: 204) In order to understand the term variety different concepts must be defined. This essay discusses the differences and similarities of the concepts of accent and dialect. While the first part of this essay deals with the term accent, the second part deals with its contrast term, the dialect.…

sentence structure. both elaborate and efficient - lots of description, but it is easy to understand basic action of the story. use of dialogue similes, metaphors, personification, onomatopoeia ○ Example - Pg 99 (narrator) - "Tears filled my eyes, and the walks and the buildings flowed and froze for a moment in the mist, glittering in winter when rain froze on the grass and foliage and turned the campus into a world of whiteness, weighting and bending both trees and bushes with fruit of…

allowing a mostly even dispersion of freezing point depression (Food Additive and Ingredient Association). Sea salt and Himalayan pink salt, however, were not coarse grained and were free of anti-caking additives, so the dispersion of their salt crystals were not uniform. The ice cream made using these salts would have taken longer to freeze, however the time each bag was shaken and each formation was created were constants, so the ice cream did not solidify completely, therefore creating…