Protein Thermal Stability Essay

967 words - 4 pages

Isolation techniques for protein take the least refined forms of the protein and develop a highly concentrated product. A concentrated protein product allows utilization of functional properties of proteins without fat, moisture, or carbohydrate contributing to or inhibiting the system. For example, through the use of isolation techniques, the starting concentration of soy flour or grit, 40-50% protein, can increase to more than 90% (Petruccelli 1995). When other substituents such as starches and fats are present in a system, water absorption generally occurs within the carbohydrate instead of the protein (Wolf 1970). As a result, isolation plays a two-fold role in concentrating the selected protein as well as eliminating unneeded or undesirable constituents in a food product.
Soy protein holds desirable, functional properties. Such properties of isolated soy protein include the formation of gels and emulsions. The protein’s hydrophilic properties make it an ideal component in confectionary and baked goods because of its water retaining properties and ability to maintain freshness. Additional uses in food stuffs include aeration, an adhesive in meat products, color control, and inhibition or promotion of fat absorption (Wolf 1970). These functional properties have allowed soy protein to become an emerging protein and usable food constituent.
Whey, an important by-product of milk, contains almost all of the milk carbohydrate and about one-fifth of milk’s protein (Smithers 1996). Isolated whey’s value, however, derives from its protein content. Its unique functional properties provide opportunities for a variety of applications. For example, whey proteins, because of their stability to acidic conditions, are an integral part of fortifying sports drinks (Smithers 1996). However, emulsification generally serves as whey’s primary function because dispersion patterns of whey in an emulsion are sensitive to changes in pH (Demetriades, 1997). Whey’s intrinsic functional properties and applications in food systems has made what was once considered a waste by-product, a very usable and valuable protein isolate. It is important to note that casein is also a useful protein that becomes isolated from the same products as whey.
Thermal stability defined is the relationship between protein denaturation and heat load applied (DeWitt 1990). Knowing how heat affects a protein’s functionality allows for selection of a protein that will be most capable of performing its desired purpose in a system. Proteins generally adjust for survivability within their normal environment (Argos 1979). Variability outside of a protein’s normal environment, as a result, is generally not well tolerated. Additionally, awareness of thermal stability demands consistency in a processing facility due to exactness required in achieving a desirable product. Thermal stability of a protein can be divided into two occurrences that eventually result in protein denaturation; aggregation...

Find Another Essay On Protein Thermal Stability

Effective Use of Rhetoric in Shakespeare's Othello

673 words - 3 pages Effective Use of Rhetoric in Othello   Shakespeare’s use of rhetoric by his characters is clearly used effectively in Othello through Iago’s and Roderigo’s conversation with Barbantio.  The two make use of double meanings, animal imagery, Devil and God comparisons, the use of sexual references, and descriptive insults to confuse Barbantio and make him angry towards Othello.  Through Iago’s initial torment, continued by

Condemnation of Prejudice in Shakespeare's Othello

723 words - 3 pages Shakespeare’s Condemnation of Prejudice in Othello      American history is a cornucopia of racial tension, beginning with the slave trade and spanning the centuries to the Ku Klux Klan and to the days of Martin Luther King. There is evidence that racial prejudice was just as prevalent in sixteenth century England as in modern day America. Othello can be seen as Shakespeare’s condemnation of racial prejudice. The character of Iago uses

Love in Othello

737 words - 3 pages Love in Othello However strong the emotional attitude of prejudices may be in Othello, Love is the most powerful emotion and ironically the emotion that leads to the most vulnerability. Loves of all kinds are tested in the tragedy and ultimately all fail to rectify the horrible situation. Marital love for Othello and Desdemona serve as both a heaven and a hell on earth. As Othello portrays by saying, If I were now to die 'Twere now to

Shakespeare's Macbeth - Creating Sympathy for Macbeth

836 words - 3 pages Creating Sympathy for Macbeth        The dark aura surrounding Shakespeare's Macbeth is well deserved, as is the darkness shrouding its title character. Although Macbeth is certainly a villainous, evil man based solely on his actions, a fuller examination of his character's portrayal leads to a more sympathetic view of him. The play does not portray Macbeth simply as a cold-blooded murderer, but rather as a tortured soul attempting to deal

The Ego and Despair in Ordinary People

1510 words - 6 pages The Ego and Despair in Ordinary People   Ordinary People by Judith Guest is the story of a dysfunctional family who relate to one another through a series of extensive defense mechanisms, i.e. an unconscious process whereby reality is distorted to reduce or prevent anxiety. The book opens with seventeen year old Conrad, son of upper middle-class Beth and Calvin Jarrett, home after eight months in a psychiatric hospital, there

Race and Social Identity in On the Road and The Reivers

2277 words - 9 pages Race and Social Identity in On the Road and The Reivers      Whether around a group of friends or among total strangers, many people feel compelled to act in certain ways to please those around them; this part of our identity is labeled conveniently as social identity. A social identity can sometimes be very close to one's personal identity, but the differences between the two is caused by social pressures and obligations, and the extent

Jack Kerouac’s On The Road - A Memorable Journey

795 words - 3 pages A Memorable Journey  Jack Kerouac's exhuberant novel, On the Road, follows a group of restless young friends criss-crossing America in second-hand cars while finding their 'kicks' in jazz, girls, drugs, and intense conversations about love, poetry, and serenity. Exposing the underground Beat lifestyle of the 1950's, Kerouac celebrates the defiance of a generation chasing the freedom promised by the American Dream while committing themselves

Literary Motifs in Hawthorne's Young Goodman Brown

1849 words - 7 pages Literary Motifs in “Young Goodman Brown”           A literary motif “is a conspicuous element, such as a type of incident, device, reference, or formula, which occurs frequently in works of literature” (Abrams 169). Incredibly, this one tale, “Young Goodman Brown” by Nathaniel Hawthorne, contains an array of familiar literary motifs (Axelrod 337).   First of all, the tale involves the common motif of a journey in quest of

Self-Damnation in Oedipus the King

1338 words - 5 pages Self-Damnation in Oedipus Rex (the King)      Sophocles' play Oedipus Rex (the King) is a tragic tale of fate and hubris. At first glance, it seems that the terrible fates of the main characters are merely the doings of mischievous or cruel gods. That Laios should die at the hands of his unknowing son, that Jocaste should later marry that son to commit the crime of incest, and that Oedipus, the son, should be the actor in both crimes all

Freud, Incest, Murder, and Oedipus the King

1366 words - 5 pages Freud, Incest, Murder, and Oedipus Rex (the King)      A Freudian analysis of Sophocles' Oedipus Rex (the King) would show that Oedipus truly contained an incestuous nature. This was revealed not only by Oedipus' marriage to his own mother, by whom he had children, but also by his irrational preference for his daughters, Antigone and Ismene. While the attention he showered to his daughters was profound and sexually tinged, he dismissed his

Comparing The Infernal Machine and Oedipus Rex

1451 words - 6 pages Comparing The Infernal Machine and Oedipus Rex (the King)     The myth of Oedipus’s incest and parricide has been retold many different times. The basic story line has remained the same. Oedipus leaves Corinth to try to escape a fate of incest and parricide. After he leaving the city, he ends up saving Thebes from the Sphinx, becoming king of the city and in the process fulfilling the prophecy. The character of Oedipus changes in each play

Similar Essays

Nasa's Contribution To Technological Advances On Earth

3572 words - 14 pages they use attractive water hyacinths. The way the system works is protein-rich water hyacinths are cultivated for use as purifiers in sewage lagoons. They are grown in ponds and gathered for use in a reverse osmosis unit. Waste is passed through a pretreatment facility before reaching the lagoon, where the water is then purified (Baker, 2000, p. 57).      This next invention can be used for the environment but can also be used in consumer

The Lost Identitiy Of Othello Essay

1136 words - 5 pages The Lost Identitiy of Othello   Othello's identity in the Venetian society is his role as "the Moor". Few people use his real name when talking about him. When speaking the given quote, Othello is telling the Venetians how he won Desdemona's heart by telling her the story of his life, and he now retells it to the Venetians. This tale-telling is a way of employing the linguistic system to reshape for himself a new identity with more

The Personality Of Othello Essay

1026 words - 4 pages The Personality of Othello     Othello’s speech to Brabantio and the Duke in Act 1, Scene 3 is of major importance in describing Othello’s personality. This long speech, found in lines 149 to 196, shows Othello for the first time as a person with depth and less as a soldier. This speech is important to the book as a whole because it is a testimony to the strength of the love between Othello and Desdemona, which will later play a major role

Act Iv Of Othello: Foreshadowing Tragedy

1245 words - 5 pages In Act 4, Scene 2 of Shakespeare's Othello, imagery and other stylistic devices are used in lines 48-74 to develop the lack of communication between Othello and Desdemona. This passage foreshadows tragedy, as it illustrates that Othello no longer trusts his wife. It is apparent that Iago's plan will be a success.   Othello begins hyperbolically: "Heaven truly knows that thou art false as hell." This also contains two antithetical