Matching Items (4)
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- All Subjects: Regional Studies
- All Subjects: Taste
- Genre: Masters Thesis
- Genre: Doctoral Dissertation
- Creators: Cohen, Adam
- Creators: Wilkie, Lynn Melissa
- Creators: Ali, Souad
- Member of: ASU Electronic Theses and Dissertations
Description
The unpleasant bitter taste found in many nutritious vegetables may deter their consumption. While bitterness suppression by prototypical tastants is well-studied in the chemical and pharmacological fields, mechanisms to reduce the bitterness of foods such as vegetables remain to be elucidated. Here tastants representing the taste primaries of salty and sweet were investigated as potential bitterness suppressors of three types of Brassicaceae vegetables. The secondary aim of these studies was to determine whether the bitter masking agents were differentially effective for bitter-sensitive and bitter-insensitive individuals. In all experiments, participants rated vegetables plain and with the addition of tastants. In Experiments 1-3, sucrose and NNS suppressed the bitterness of broccoli, Brussels sprouts, and cauliflower, whereas NaCl did not. Varying concentrations of NaCl and sucrose were introduced in Experiment 4 to assess the dose-dependency of the effects. While sucrose was a robust bitterness suppressor, NaCl suppressed bitterness only for participants who perceived the plain Brussels sprouts as highly bitter. Experiment 5, through the implementation of a rigorous control condition, determined that some but not all of this effect can be accounted for by regression to the mean. Individual variability in taste perception as determined by sampling of aqueous bitter, salty, and sweet solutions did not influence the degree of suppression by NaCl or sucrose. Consumption of vegetables is deterred by their bitter taste. Utilizing tastants to mask bitterness, a technique that preserves endogenous nutrients, can circumvent this issue. Sucrose is a robust bitter suppressor whereas the efficacy of NaCl is dependent upon bitterness perception of the plain vegetables.
ContributorsWilkie, Lynn Melissa (Author) / Capaldi Phillips, Elizabeth D (Thesis advisor) / Cohen, Adam (Committee member) / Johnston, Carol (Committee member) / Sanabria, Federico (Committee member) / Arizona State University (Publisher)
Created2014
Description
The unpleasant bitter taste found in many nutritious vegetables may deter people from consuming a healthy diet. We investigated individual differences in taste perception and whether these differences influence the effectiveness of bitterness masking. To test whether phenylthiocarbamide (PTC) `supertasters' also taste salt and sugar with greater intensity, as suggested by Bartoshuk and colleagues (2004), we infused strips of paper with salt water or sugar water. The bitterness rating of the PTC strip had a significant positive linear relationship with ratings of both the intensity of sweet and salt, but the effect sizes were very low, suggesting that the PTC strip does not give a complete picture of tasting ability. Next we investigated whether various seasonings could mask the bitter taste of vegetables and whether this varied with tasting ability. We found that sugar decreased bitterness and lemon decreased liking for vegetables of varying degrees of bitterness. The results did not differ by ability to taste any of the flavors. Therefore, even though there are remarkable individual differences in taste perception, sugar can be used to improve the initial palatability of vegetables and increase their acceptance and consumption.
ContributorsWilkie, Lynn Melissa (Author) / Phillips, Elizabeth D. (Thesis advisor) / Cohen, Adam (Committee member) / Johnston, Carol (Committee member) / Arizona State University (Publisher)
Created2012
Description
Relevant literature was analyzed alongside interview data from participants concerning issues of anti-Semitism, Israel affiliation, and Jewish identity. Qualitative coding and theme identification were used to determine possible relationships among the variables, with special attention to the role anti-Semitism plays in influencing Israel affiliation. Semi-structured interviews were conducted with 9 young American Jews (18-24) currently enrolled as undergraduate students in universities. The results revealed that continuity of the Jewish people is a core value for many American Jews. Anti-Semitism is often under reported by young American Jews, but for some anti-Israel sentiments are conflated with anti-Semitism. It was also observed that knowledge of anti-Semitism plays an integral role in shaping Jewish identity. Finally, it was found that Israel affiliation polarizes the Jewish community, often resulting in the exclusion of left-leaning Jews from the mainstream Jewish community. These results were analyzed within racial, social, and political frameworks.
ContributorsHobbs, Emma Caroline (Author) / Adelman, Madelaine (Thesis advisor) / Shabazz, Rashad (Committee member) / Cohen, Adam (Committee member) / Langille, Timothy (Committee member) / Arizona State University (Publisher)
Created2018
Afghani women's resistance: their struggle for autonomy under the Soviet Occupation and Taliban rule
Description
The American-led 'war on terror' affected how media outlets and some contemporary literature addressed and stereotyped Islam. One of the most common stereotypes regarded the status of women in society. The constant images of oppressed Afghani women generated a wave of negativity toward Islam. Afghani women were portrayed as passive characters during the Taliban rule awaiting liberation from the west. Defending their rights became one of the moral justifications for waging the 'war on terror' after the tragedy of 9/11. Gender politics in Afghanistan is closely tied to the regime in power. The Soviet invasion of Afghanistan in 1979 and the social and cultural transformation of society that followed also directly affected women and their identity as Muslims. Both the Soviet and the Taliban regimes envisioned a drastic transformation of women's participation in the public sphere. Each regime's gender politics oppressed Afghani women and sought to take away their agency. Some women welcomed the freedom under the Soviets, but others found the freedoms to be oppressive. The Taliban aimed to preserve men's authority over women. However, Afghani women never gave up the hope of freedom and equality. My main argument is to challenge the contemporary belief that Afghani women were passive characters in their history. This study introduces a fresh perspective on to women's role as change makers in the society. I argue that Afghani women maintained their autonomy and fought for their rights, before the rest of the world rushed to liberate them. They engaged in different forms of resistance from directly attacking the oppressors to keeping their resistance hidden. This thesis challenges the notion of Afghani women as victims in need of saving. On the contrary, they were the agents of change in their communities. On the basis of ethnographic interviews and three memoirs written by women who lived in Afghanistan during Soviet and Taliban rule. Their resistance against the oppressors is an affirmation of their courage and bravery.
ContributorsRezai, Shabnam (Author) / Gallab, Abdullahi (Thesis advisor) / Ali, Souad (Thesis advisor) / Kefeli, Agnes (Committee member) / Arizona State University (Publisher)
Created2017