Category: Chemistry

Identifying Spectra for Acetaminophen

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Locate and identify the 1H 13C NMR spectra for Acetaminophen using the resources provided or others of your choosing. Explicitly identify any key peak(s) on those spectra and what that peak correlates to on the different parts of your chemical structure.
To complete this assignment, do the following and submit a report of your findings. Your submission should include:
Save the spectra as separate pdf or jpg. One page each for your 1H 13C spectra.
On each of the pdf or jpg of your spectra, draw out the chemical formula showing all bonds.
On your molecular structure drawing, circle the parts of the chemical structure indicated by the major peaks on the spectra and correlate with the spectral numbers for that region.
In a separate MS Word or Google document, discuss any key reactivity and/or bioactivity that has come from your selected compound and how that correlates to the recall/safety concerns that the compound has/had. Include in this document a properly formatted APA citations list that you used.
To complete this assignment you will need to find both 1H 13C spectra for your compound. You may use the following resources or other resources you find for this data:
https://webbook.nist.gov/chemistry/
https://spectrabase.com/
https://sdbs.db.aist.go.jp/sdbs/cgi-bin/cre_index.cgi
http://www.chemspider.com/
https://www.sigmaaldrich.com/US/en

 

Actual chemical accident

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The project will be a paper on an actual accident involving an chemical(s), chemical plant, or explosion in a manufacturing plant. There is not a page limit on the paper, but it must be at least 10 pages, double-spaced, with references, and must be plagiarism free. Therefore, please ensure all quotes and sources are noted. APA formatting is to be used.
Please email me with your project topic as indicated above using the message feature in the classroom.
Incidents that are off limits: SC chlorine release (for an example of that report click the link) and the Bhapal, India Methyl Isocyanate release.

 

Anatomical concepts associated with biology, chemistry

Posted on | by Brian Leakey

All of your answers should be written in your own words, using full sentences, correct terminology, and proper spelling and grammar.

  1. Explain the anatomical concepts associated with biology, chemistry, and homeostasis. Summarize this module’s key points in 5-6 sentences.
  2. Explain the physiological concepts associated with biology, chemistry, and homeostasis. Summarize this module’s key points in 5-6 sentences.
  3. How will you apply the concepts you have learned about biology, chemistry, and homeostasis in real life and in your future career?
  4. Which topic within this module has been the most valuable to your learning experience and why?
  5. Which topic(s) within this module did you struggle to understand and why?
  6. (Optional) Do you have any suggestions for your instructor on how they could help you connect with the difficult topics you’ve noted?

The Lewis dot structure

Posted on | by admin3

 

 

Clearly explain what the Lewis dot structure and the Bohr model have in common. Provide, at least two examples to support your explanation. The second paragraph should contain an explanation of how Lewis and Bohr are different. Again, provide at least two examples to support your explanation. In addition, describe what the Bohr model and the Lewis dot structure of sodium would look like. Again, give me a detailed explanation of the appearance of each of the models for sodium, do NOT simply give me a picture

 

The Process of Critical Inquiry , Variables, Ethics in Social Science Research

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Submit five research questions on five topics that could be used in a survey on fear of crime that you could give to people in their neighborhood.

In your response, include answers to the following:

Describe each topic.
Explain the intended approach toward each research question for each topic.
Describe the ways in which these questions will support your survey analysis.

Dose Response and Exposure

Posted on | by Brian Leakey

Conduct a dose response and exposure assessment on the following pesticides and fertilizers (aka, selected hazards materials)
DOMAIN, DOMAIN TYPE, NAME
CHEMICAL, FUNGICIDE, CHLOROTHALONIL
CHEMICAL, FUNGICIDE , MANCOZEB
FERTILIZER , FERTILIZER, NITROGEN
FERTILIZER, FERTILIZER, PHOSPHATE
FERTILIZER, FERTILIZER , POTASH
CHEMICAL, INSECTICIDE, BIFENTHRIN
CEHMICAL, OTHER , HYDROGEN PEROXIDE
CHEMICAL, INSECTICIDE , MALATHION
CHEMICAL, INSECTICIDE , METHOMYL
Refer to EPA’s Health Risk Assessment guide for details https://www.epa.gov/risk/conducting-human-health-risk-assessment
Be specific about the structure and the chemical nature of the pesticides and fertilizers listed above, discuss biomarkers, the models to test health complications and mechanisms of injury such as immune response or organ damage, dose exposure levels for concern in human or even animals, levels or concentrations that are injurious to human health (or animal studies?) thresholds, quantifiable measurements, are there any animal experiments that can be extrapolated?
Address the following points about the nine listed pesticides and fertilizers:

  1. What are the exposure routes of the nine pesticides and fertilizers? For example, if it is inhalation or via direct skin contact, what happens at the biological, chemical and/molecular level when these are inhaled or with dermal contact?
  2. What exposure routes and models can best describe the potential health hazard of the these nine chemicals?
  3. What information and scientific literature are available on the dose-response studies on government websites or other reliable resources?
  4. What happens to the agent (biotransformation) and what does the agent do to the host (health outcomes) – Toxicological pathways of Absorption, Distribution, Metabolism, and Excretion (ADME)
  5. What is the mechanism of the action of the hazardous material (s)?
  6. What are the approaches to quantify risk factors when a population/individual is exposed to the selected material?
  7. What is the population demography that is at risk when exposed to the selected material?
    Examples of sources of information Pubmed and google scholar search on two of the above chemicals (mancozeb and chlorothalonil) pulled several studies that address many of the questions above, including exposure, methods of absorptions, quantification, and mechanisms of actions:
    • https://scholar.google.com/scholar?hl=en&as_sdt=0,10&q=exposure+routes+and+quantification+chlorothalonil
    • https://pubmed.ncbi.nlm.nih.gov/36078202/