The Definition of Hydrophobic With Examples

To be hydrophobic means to fear water. In chemistry, it refers to the property of a substance to repel water. It isnt that the substance is repelled by water so much as it has a lack of attraction to it. A hydrophobic substance exhibits hydrophobicity and may be termed hydrophobic. Hydrophobic molecules tend to be nonpolar molecules that group together to form micelles rather than be exposed to water. Hydrophobic molecules typically dissolve in nonpolar solvents (e.g., organic solvents). There are also superhydrophobic materials, which have contact angles with water greater than 150 degrees. Surfaces of these materials resist wetting. The shape of water droplets on superhydrophobic surfaces is called the Lotus effect, in reference to the appearance of water on a lotus leaf. Superhydrophobicity is considered a result of interfacial tension and not a chemical property of matter. Examples of Hydrophobic Substances Oils, fats, alkanes, and most other organic compounds are hydrophobic. If you mix oil or fat with water, the mixture will separate. If you shake a mixture of oil and water, the oil globules will eventually stick together to present a minimum surface area to the water. How Hydrophobicity Works Hydrophobic molecules are nonpolar. When they are exposed to water, their nonpolar nature disrupts hydrogen bonds between water molecules, forming a clathrate-like structure on their surface. The structure is more ordered than free water molecules. The change in entropy (disorder) causes nonpolar molecules to clump together to decrease their exposure to water and thus decrease the entropy of the system. Hydrophobic vs. Lipophilic While the terms hydrophobic and lipophilic are often used interchangeably, the two words dont mean the same thing. A lipophilic substance is fat-loving. Most hydrophobic substances are also lipophilic, but exceptions include fluorocarbons and silicones.

Segregation in The Color Purple Essay examples - 464 Words

In the film â€Å"The Color Purple†, segregation plays an important role and the differences between black people and white people are shown through race and life. The Color Purple focuses on the lives of several African American women who are faced with abuse, violence, and cruelty. The fim is set in Macon County Georgia and there are two main characters’ Celie and her sister Nettie. Celie is the character the movie is centered around and she is also the film’s narrator. The story is based on Celie’s life and the many different issues along the way that she has encountered such as being raped by her father over and over again, abused by her father and forced into marriage at fourteen to another abusive man†¦show more content†¦Celie was beaten and raped so much that she become so used to not fighting back or even crying. Celie was always a religious person and someone who refused to lose faith even through all the violent things she had endured. She always talks to God asking him to give her strength. From the moment Celie walks into Mister’s house she is expected to clean, cook, raise his kids, and have sex with him whenever he chooses. Along the way Celie meets two women who support her and constantly remind her that she is worth more than she thinks and that she does not deserve the live that she is living with Albert. As more time passes by Celie finally begins to realize her self that she does not have to continue living her life in constant fear and violence and she builds the courage to leave Albert. From there on everything starts to come together for Celie and her loved ones while Albert looses everything he has. Albert eventually realizes how cruel he has treated Celie and what a terrible person he has been his whole life, he finally does something to make Celie happy and he uses all the money he has saved to bring Nettie back to reunite with Celie. I enjoyed this film because it has a real story behind it and is something I can relate to as a women and also can relate to the characters from the film. While watching the film is almost feels as if it isShow MoreRelatedEssay on Plant Genetics Labpaq679 Words   |  3 Pagescomparing only one trait color. We are also showing Mendel’s law of segregation with a Dihybrid cross comparing two traits of color and texture. Introduction Three purposes: 1. To predict the genetic frequency off offspring. 2. To predict the outcomes of genetic crosses using punnett squares. 3. Statistically analyze the results of a genetic cross. Hypothesis: 1. Monohybrid cross—Predict that 75% of the tobacco seeds will sprout and that green 80% will be the dominant color. 2. Dihybrid cross---InRead MoreAnalysis Of Gregor Mendel s The Mid 1800 S1182 Words   |  5 Pagesto rest. Mendel did experiments on two different colored pea plants. 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The company is conveying to the consumer this toy will entertainRead MoreHistorical Background of The Color Purple, I know why the caged bird sings, and The Awakening1383 Words   |  6 PagesHistorical Background of The Color Purple, I know why the caged bird sings, and The Awakening In a stereotypical society, the reader expects for the protagonist of a novel to be a strong, heroic male who saves the day and gets the girl. However, in the classic works â€Å"The Awakening† (Kate Chopin), â€Å"The Color Purple† (Alice Walker), and â€Å"I Know Why the Caged Bird Sings† (Maya Angelou), a different kind of protagonist is portrayed. In these novels, the protagonist is a heroine who grows throughoutRead MoreAlice Walker s The Color Purple1460 Words   |  6 PagesElements of Alice Walker’s Life Portrayed in The Color Purple An artist stands in the studio before a blank canvas on an easel, with a palette of colors in hand. Not knowing which to choose from, the artist looks over the variety of shades thinking about the different possibilities, willing to create something extraordinary. With an open mind, the artist ponders the idea of creating something entirely original that goes against the artistic styles practiced before. All on his own Pablo Picasso createdRead MoreThe Color Purple by Alice Walker675 Words   |  3 Pagesher lifelong journey towards change. Walkers career as a writer took flight with the publication of her third novel, The Color Purple, in 1982. Set in the early 1900s, the novel portrays the life and struggles of a female African-American experience through the eyes of its narrator, Celie. Celie suffers terrible abuse from her father and later from her husband. The Color Purple is a novel structured through a series of letters. Celie writes about the misery of childhood incest, physical abuse, and

Death Euphemisms Between Chinese and English free essay sample

A. Context of Culture According to Malinowski (1923), context can be distinguished into three types: context of utterance, context of situation and context of culture. The context of utterance here is similar to the linguistic context that later scholars argue, which refers to the words and sentences in which a particular words or sentences embeds. Malinowski further argues that the concept of context has to be broadened and that the situation in which words are uttered can never be passed as irrelevant to the linguistic expression. Therefore, he put forth the term â€Å"context of situation to refer to the wider idea of context or the general conditions under which a language is spoken. † And the context of culture, Malinowski observes that it is the reality of the culture, the life and the customs of a person in which language is essentially rooted. To sum up, Malinowski find that to understand the meaning of what is said, we should not only consider the particular context of utterances, but also take into account the culture characteristic of the society. We will write a custom essay sample on Death Euphemisms Between Chinese and English or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Later, J. R. Forth maps the notions of context of situation into a general theory of levels of language. Forth makes very little use of context of culture. The notion of culture as a context for a language is more fully articulated in the work of his contemporaries Sapir and Whorf. Sapir does not adopt the expression of context of culture, but he does interpret the language as expressing the mental life of its speakers. Both of Sapir and Whorf. Sapir developed their powerful view called â€Å"Sapir-Whorf hypothesis† which the culture provides the context within words are interpreted.