Matching Items (11)

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What Do Chemical Engineers Do, Exactly?

Description

When it comes to the topic of chemical engineering, the general public has a set of neutral, if slightly uninformed perceptions that are largely tempered by the initial emotional responses

When it comes to the topic of chemical engineering, the general public has a set of neutral, if slightly uninformed perceptions that are largely tempered by the initial emotional responses to the field and its associated topics. These topics include the differentiation between chemical engineers and chemists, the importance and potential danger of the products they produce, as well as the association of the subject matter with less than favorable secondary education experiences. This thesis consists of first assessing the opinions of a population meant to represent the general public regarding these subjects, then exploring the potential improvements of opinion and understanding that may be yielded from presenting the subject matter by way of a concise learning tool, such as a video. The results of this effort showed that factual understanding can be at least incrementally improved for 18% of participants through this method, while the effect on opinions can range from being improved to maintaining an enduring indifference, with an average of 17% of participants seeing improvement. Further iteration of this methodology with more consistent, impartial survey methods and refined questions could potentially yield more noteworthy improvements within the subjective domain, with the resultant learning tool of that iteration being applicable as not only an instrument of educating the general public, but also as a means to recruit potential students to the ASU chemical engineering degree program.

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Date Created
  • 2019-05

Reflections on Engineering School from Practicing Engineers

Description

This study was conducted to look for ways to improve engineering school in order to maximize student benefit. The results of the survey showed that additional communication and professional

This study was conducted to look for ways to improve engineering school in order to maximize student benefit. The results of the survey showed that additional communication and professional interaction lessons as well as more emphasis on software and programming languages would help prepare engineers for their careers. There was unanimous support of communication materials from survey respondents, with constructive confrontation and career path discussion receiving the most positive feedback. Due to the unanimous support of communications material, and the fact that short communications lessons could drive home key points without adding too much work to engineering students’ already busy schedules, two short lesson outlines for constructive confrontation and career path discussion were produced for this study.

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Date Created
  • 2020-12

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Improving the Engineering Retention Rate: A tool to match students to their ideal field of study

Description

Engineering is a multidisciplinary field with a variety of applications. However, since there are so many disciplines of engineering, it is often challenging to find the discipline that best suits

Engineering is a multidisciplinary field with a variety of applications. However, since there are so many disciplines of engineering, it is often challenging to find the discipline that best suits an individual interested in engineering. Not knowing which area of engineering most aligns to one’s interests is challenging when deciding on a major and a career. With the development of the Engineering Interest Quiz (EIQ), the goal was to help individuals find the field of engineering that is most similar to their interests. Initially, an Engineering Faculty Survey (EFS) was created to gather information from engineering faculty at Arizona State University (ASU) and to determine keywords that describe each field of engineering. With this list of keywords, the EIQ was developed. Data from the EIQ compared the engineering students’ top three results for the best engineering discipline for them with their current engineering major of study. The data analysis showed that 70% of the respondents had their major listed as one of the top three results they were given and 30% of the respondents did not have their major listed. Of that 70%, 64% had their current major listed as the highest or tied for the highest percentage and 36% had their major listed as the second or third highest percentage. Furthermore, the EIQ data was compared between genders. Only 33% of the male students had their current major listed as their highest percentage, but 55% had their major as one of their top three results. Women had higher percentages with 63% listing their current major as their highest percentage and 81% listing it in the top three of their final results.

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Created

Date Created
  • 2020-05

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The Key to a Happier Thanksgiving: A Study on the Intricacies of Turkey Preparation

Description

The process of cooking a turkey is a yearly task that families undertake in order to deliver a delicious centerpiece to a Thanksgiving meal. While other dishes accompany and comprise

The process of cooking a turkey is a yearly task that families undertake in order to deliver a delicious centerpiece to a Thanksgiving meal. While other dishes accompany and comprise the traditional Thanksgiving supper, focusing on creating a turkey that satisfies the tastes of all guests is difficult, as preferences vary. Over the years, many cooking methods and preparation variations have come to light. This thesis studies these cooking methods and preparation variations, as well as the effects on the crispiness of the skin, the juiciness of the meat, the tenderness of the meat, and the overall taste, to simplify the choices that home cooks have to prepare a turkey that best fits their tastes. Testing and evaluation reveal that among deep-frying, grilling, and oven roasting turkey, a number of preparation variations show statistically significant changes relative to a lack of these preparation variations. For crispiness, fried turkeys are statistically superior, scoring about 1.5 points higher than other cooking methods on a 5 point scale. For juiciness, the best preparation variation was using an oven bag, with the oven roasted turkey scoring about 4.5 points on a 5 point scale. For tenderness, multiple methods are excellent, with the best three preparation variations in order being spatchcocking, brining, and using an oven bag, each of these preparation variations are just under a 4 out of 5. Finally, testing reaffirms that judges tend to have different subjective tastes, with some having different perceptions and opinions on some criteria, while statistically agreeing on others: there was 67% agreement among judges on crispiness and tenderness, while there was only 17% agreement on juiciness. Evaluation of these cooking methods, as well as their respective preparation variations, addresses the question of which methods are worthwhile endeavors for cooks.

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Date Created
  • 2020-05

Solar Power around the Phoenix Metro Area: Is there a Stigma Against Solar Energy?

Description

A survey was created to help gain some insight on the opinions of homeowners across the <br/>Phoenix Metro Area. This survey consisted of 7 questions relating to personal experiences and

A survey was created to help gain some insight on the opinions of homeowners across the <br/>Phoenix Metro Area. This survey consisted of 7 questions relating to personal experiences and <br/>the homeowners’ opinions or concerns. The results of the survey showed that there are a few <br/>concerns surrounding solar energy with an emphasis on the cost of maintenance of panels and <br/>the payback period where the homeowners would see a return on their investment. Most of the <br/>homeowners answered that they do not use solar energy but have thought about using it for their <br/>main source of energy before. The homeowners in the survey also thought that solar energy was <br/>overall too expensive and that it would take a long time before they would see any payoff or <br/>savings from the solar panels. It was found that the payback period for panels is around 7 years <br/>and that depending on the size of the solar system installed or on the model used, solar panels <br/>cost much less than many people think. This was found by researching non-biased resources <br/>from government websites and from local energy companies’ websites. To combat the concerns <br/>found from the survey, an infographic was created to help inform the public about solar energy <br/>and allow the homeowners to make decisions that are well informed and not based on <br/>misinformation. The infographic included information related to the survey by explaining the <br/>survey and explaining topics that were of concern to the homeowners who took the survey. In <br/>addition, the infographic displayed information about solar energy and that the decision to use <br/>solar is ultimately up to the audience.

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Date Created
  • 2021-05

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The Evaluation of Algae-Derived Activated Carbon Adsorbents for Direct CO2 Capture from Ambient Air

Description

Temperature swing adsorption is a commonly used gas separation technique, and is being<br/>further researched as a method of carbon capture. Carbon capture is becoming increasingly<br/>important as a potential way to

Temperature swing adsorption is a commonly used gas separation technique, and is being<br/>further researched as a method of carbon capture. Carbon capture is becoming increasingly<br/>important as a potential way to slow global warming. In this study, algae-derived activated<br/>carbon adsorbents were analyzed for their carbon dioxide adsorption effectiveness.<br/>Algae-derived carbon adsorbents were synthesized and then studied for their adsorption<br/>isotherms and adsorption breakthrough behavior. From the generated isotherm plots, it was<br/>determined that the carbonization temperature was not high enough and that more batches of<br/>adsorbent would have to be made to more accurately analyze the adsorptive potential of the<br/>algae-derived carbon adsorbent.

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Date Created
  • 2021-05

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Separation of Gases From Biomass

Description

The solid municipal waste contains approximately 60% of organic matter and after varying temperature, pressure and residence time as factors, the temperature influenced the yield at least twice more than

The solid municipal waste contains approximately 60% of organic matter and after varying temperature, pressure and residence time as factors, the temperature influenced the yield at least twice more than the residence time. The pressure had the least effect on the production of the syngas. Different types of hydrogen separation were explored ranging from pressure swing adsorption (PSA) to water splitting, factional/cryogenic method and then hydrogen selective membranes. The membranes were found to be more cost efficient, and easily accessible and fabricated and produced purer hydrogen gas. The different membranes were explored, and their different characteristics were explored, and a decision matrix showed that the polymeric membrane was 1.37 time better than microporous membrane and 1.54 times better than dense metal membrane.

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Date Created
  • 2019-05

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Parallel screening of FDA-approved antineoplastic drugs for identifying sensitizers of TRAIL-induced apoptosis in cancer cells

Description

Background
Tumor Necrosis Factor-α Related Apoptosis Inducing Ligand (TRAIL) and agonistic antibodies to death receptor 4 and 5 are promising candidates for cancer therapy due to their ability to induce

Background
Tumor Necrosis Factor-α Related Apoptosis Inducing Ligand (TRAIL) and agonistic antibodies to death receptor 4 and 5 are promising candidates for cancer therapy due to their ability to induce apoptosis selectively in a variety of human cancer cells, while demonstrating little cytotoxicity in normal cells. Although TRAIL and agonistic antibodies to DR4 and DR5 are considered safe and promising candidates in cancer therapy, many malignant cells are resistant to DR-mediated, TRAIL-induced apoptosis. In the current work, we screened a small library of fifty-five FDA and foreign-approved anti-neoplastic drugs in order to identify candidates that sensitized resistant prostate and pancreatic cancer cells to TRAIL-induced apoptosis.
Methods
FDA-approved drugs were screened for their ability to sensitize TRAIL resistant prostate cancer cells to TRAIL using an MTT assay for cell viability. Analysis of variance was used to identify drugs that exhibited synergy with TRAIL. Drugs demonstrating the highest synergy were selected as leads and tested in different prostate and pancreatic cancer cell lines, and one immortalized human pancreatic epithelial cell line. Sequential and simultaneous dosing modalities were investigated and the annexin V/propidium iodide assay, in concert with fluorescence microscopy, was employed to visualize cells undergoing apoptosis.
Results
Fourteen drugs were identified as having synergy with TRAIL, including those whose TRAIL sensitization activities were previously unknown in either prostate or pancreatic cancer cells or both. Five leads were tested in additional cancer cell lines of which, doxorubicin, mitoxantrone, and mithramycin demonstrated synergy in all lines. In particular, mitoxantrone and mithramycin demonstrated significant synergy with TRAIL and led to reduction of cancer cell viability at concentrations lower than 1 μM. At these low concentrations, mitoxantrone demonstrated selectivity toward malignant cells over normal pancreatic epithelial cells.
Conclusions
The identification of a number of FDA-approved drugs as TRAIL sensitizers can expand chemotherapeutic options for combination treatments in prostate and pancreatic cancer diseases.

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Date Created
  • 2011-11-01

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Chemical Engineering of Pasta

Description

Pasta is a staple food for many people and understanding how the process of making it at a homemade level and industrial level should be examined. Pasta is a large

Pasta is a staple food for many people and understanding how the process of making it at a homemade level and industrial level should be examined. Pasta is a large and growing market due to growing populations and new products, therefore, researching the pasta has many benefits. The goal of the research is to determine a consistent way to make homemade pasta and compare it to the industrial method. The comparisons that will be examined are the costs and the process to make the pasta. From there it can be determined where homemade pasta can fit in the market. Through experimentation, an optimal ratio of 1.65 grams of flour to 1 gram of egg was found to create pasta dough that would consistently make pasta easy to work with. Different methods of storage were tested to find a viable method to store fresh pasta. It was found that storing the pasta in an enclosed bag with a condensed shape in the freezer was the best method because it created the most durable pasta out of all the trials and it could be cooked. The industrial method for making pasta differed in some aspects to the homemade pasta method. The biggest changes were the use of an extruder and a drying machine which makes it easier to mass produce uniform pasta. The cost per kilogram based off ingredient prices to make homemade pasta was 0.92 dollars while the industrial pasta cost 0.89 dollars per kilogram. The biggest changes in cost comes from the method of storage of homemade pasta. It was determined that following the drying process of the industrial method would be best because then the price difference is dependent on the price of ingredients. This led to multiple possibilities where homemade pasta could enter the market, for example, as a part of premade meals. Overall, it is possible to create a better quality pasta that can be supplied to a wide arrange of demographics.

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Date Created
  • 2019-12

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Analyzing the Economic Significance of Implementing a Hydrometallurgical Method of Copper Extraction in Zimbabwe.

Description

Mangura Mine in Zimbabwe has been operating under a traditional copper mining method for the past few decades. This mining method is referred to as the pyrometallurgical process. The process

Mangura Mine in Zimbabwe has been operating under a traditional copper mining method for the past few decades. This mining method is referred to as the pyrometallurgical process. The process involves copper ore extraction, crushing, milling, floatation, concentrating and smelting. With the low copper grades reported at the mine, this multi-stage process is not highly effective to extract this metal. The energy, labor and other expenses incurred in pollution control, have been high. The mine is downsizing every year and it is expected to close in the foreseeable time horizon, even though they still have copper reserves at their property. This project was aimed at providing an effective approach to the future of extracting low grade copper through using a hydrometallurgical extraction process. The hydrometallurgical method is a multi-stage process involving the leaching of copper ore, solvent extraction and electrowinning. The economic viability of implementing a hydrometallurgical process for extracting copper was evaluated. The paper demonstrated the feasibility of the hydrometallurgical process in extracting low grade copper at the mine. A detailed extraction process was developed with the goal of recovering 2.9 million metric tons of copper per year with 99.9 wt.% minimum purity. The return on investment was estimated to be more than 200%. All the findings indicated that implementing a hydrometallurgical process should be the future of Mhangura Mine.

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Created

Date Created
  • 2019-05