Literature Assignment #1 (pts
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Date
Jan 9, 2024
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Kaitlin Ngoc Pham
NUFS 115 - Sec 01
Literature Assignment #1 - Part Two
Article Link:
https://csu-sjsu.primo.exlibrisgroup.com/permalink/01CALS_SJO/1nj5q0c/cdi_crossref_primary
_10_1016_j_fct_2019_110959
Article Citation:
Jansen, T., Claassen, L., van Kamp, I., & Timmermans, D. R. M. (2020). “All
chemical substances are harmful.” public appraisal of uncertain risks of food additives and
contaminants.
Food and Chemical Toxicology
,
136
, 110959–.
https://doi.org/10.1016/j.fct.2019.110959
Title of Article:
‘All chemical substances arew harmful. ‘ public appraisal of uncertain risks of
food additives and contaminates’
Author:
Jansen Tom, Claassen Liesbeth, van Kamp Irene, & Timmermans Danielle
Year of Publication:
2020
Title of Journal:
Food and Chemical Toxicology
Volume #:
vol. 136
Page Range:
p. 110959
In order to begin conducting my search for this article, I typed in “food additive effects
(study or trial)” in the SJSU One Search system on the MLK Library website. Some filters I
applied were time frame - 2011 to 2013, peer reviewed, food culture, food toxicology, and food.
Summary
The purpose of the study, ‘All chemical substances arew harmful. ‘ public appraisal of
uncertain risks of food additives and contaminates’, the purpose or goal is to determine if
chemical presence and exposure really constitutes risk. Essentially, a risk assessment was
performed over several contaminants and food additives. Public point of view is collected and
considered to understand the thought process behind fool selection methods individuals use.
Please keep in mind that although the general public evaluations are considered, the information
can sometimes be inconclusive.
Method
Participants were recruited through a national online research panel (Flycatcher Internet
Research, www.flycatcher.eu; ISO 26362) to fill out a questionnaire that followed a 5-point
Likert Scale (completely disagree-completely agree). The sign up to participate was voluntary.
Incentive participants may have had to sign up was the potential to earn points for participation
and gain gift cards. There ended up being a total ofr 1550 participants. The article states,
“The sample was a priori stratified on sociodemographic variables age, gender, education
and geographical location to be comparable to the characteristics of the researched
sample of the Dutch general population in 2018 based on data from Statistics Netherlands
(2018)” (Jansen T., et al. 2020).
Three additives / contaminants were chosen; Residues of Bisphenol (BPA), Residues of Mineral
Oil Aromatic Hydrocarbons (MOAH), and Synthetic Amorphous Silica (SAS)). Once data was
collected on beliefs and attitudes of individuals towards food chemicals, a general summary was
drawn together.
Major Findings
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For each system listed in the first column of the table below, decide (if possible) whether the change described in the second column will increase the entropy S
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A few moles of nitrogen (N₂) gas.
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A few grams of ammonia vapor (NH₂).
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A chemist fills a reaction vessel with 7.76 atm nitrogen (N₂) gas, 7.51 atm hydrogen (H₂) gas, and 0.524 atm ammonia (NH₂) gas at a temperature of 25.0°C
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O CHEMICAL REACTIONS
Writing the net equation for a sequence of reactions
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The extraction of aluminum metal from the aluminum hydroxide in bauxite ore by the Hall-Héroult process is one of the most remarkable success stories of late
19th century practical chemistry, turning aluminum from a rare and precious metal into the cheap commodity it is today. In the first step, aluminum hydroxide
reacts to form alumina and water:
2 Al(OH)3(s)-Al₂O3(s) + 3 H₂O(g)
11
In the second step, alumina and carbon react to form aluminum and carbon dioxide:
2 AL₂O3(s)+3 C(s)-4 Al(s) + 3 CO₂(9)
Write the net chemical equation for the production of aluminum from aluminum hydroxide and carbon. Be sure your equation is balanced.
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