The Aged Mrs. Witch song is a classic children's song that tells the story of an old witch who lives in a haunted house. The song depicts the witch as a mysterious and magical character, with references to her long, gray hair and crooked nose. The lyrics suggest that she is wise and powerful, with a keen understanding of the supernatural world. The main idea of the song is the portrayal of the witch as an intriguing and fascinating character. Through the use of vivid and descriptive language, such as "her eyes of fire" and "her spectacles of glass," the song creates a sense of wonder and curiosity about the witch and her powers.
Dr. Yomaira Pagán-Torres is a Professor of Chemical Engineering at the University of Puerto Rico at Mayaguez. She received her Ph.D. in Chemical Engineering from the University of Wisconsin-Madison in 2011, under the guidance of Prof. James Dumesic. At UW, her research focused on developing catalytic technologies for biomass conversion. Before her academic position at UPR, she worked as Senior Engineer for The Dow Chemical Company in the Feedstocks, Olefins, Chemicals, and Alternative Technologies Research and Development group in Freeport, Texas. Her research group combines materials synthesis, advanced characterization, and kinetic studies to design bifunctional heterogeneous catalysts for the activation of targeted functional groups within carbon-based feedstocks, such as lignocellulosic biomass, carbon dioxide, and plastic polymers. Her research, teaching, and service contributions have been recognized with the University of Puerto Rico-Mayagüez College of Engineering Distinguished Professor Award (2017 and 2020).
Specifically, insights on the effect of structural, surface, and electronic properties of Cu Ga2O3 ZrO2 catalysts and the role of metal-metal oxide interfaces in increasing methanol yields will be discussed. Specifically, insights on the effect of structural, surface, and electronic properties of Cu Ga2O3 ZrO2 catalysts and the role of metal-metal oxide interfaces in increasing methanol yields will be discussed.
Through the use of vivid and descriptive language, such as "her eyes of fire" and "her spectacles of glass," the song creates a sense of wonder and curiosity about the witch and her powers. The song also speaks to the theme of aging, as the witch is described as "aged" and "old." This serves to emphasize her wisdom and experience, as well as her place in the supernatural world.
"Tuning Heterogeneous Catalyst Surfaces for Chemical Conversions" by Yomaira Pagán-Torres
Lignocellulosic biomass and carbon dioxide have emerged as attractive carbon-based feedstocks for the sustainable production of fuels and chemicals. However, the complex structure of these feedstocks requires the development of catalytic materials that promote selective C-O, C-H, and C-C bond cleavage, while maintaining catalytic stability. Our research group focuses on developing strategies to address this challenge by combining materials synthesis, advanced characterization, and kinetic measurements to elucidate the mechanisms that govern selective C-O, C-H, and C-C bond activation over bifunctional catalysts in the conversion of biomass-derived substrates and carbon dioxide.
In this talk, I will present our work on developing catalytic strategies for deoxydehydration (DODH) and hydrodeoxygenation (HDO) of carbohydrate-derived alcohols and acids to platform chemicals. Specifically, I will discuss the HDO of biomass-derived substrates, such as 1,4-anhydroerythritol, tartaric acid, and glycerol over bifunctional catalysts comprised of a supported hydrogen dissociating metal center (Pd, Rh, Pt) coupled with a redox metal oxide center (MoOx, ReOx, WOx). Our results, based on the combination of catalyst synthesis, kinetic measurements, and advanced characterization highlight the role of the noble metal, metal oxide species, and catalyst support in promoting selective C-O bond cleavage.
In the second part of the talk, I will present our latest efforts on developing Cu-based mixed-metal oxide catalysts for converting carbon dioxide to methanol. Specifically, insights on the effect of structural, surface, and electronic properties of Cu/Ga2O3/ZrO2 catalysts and the role of metal-metal oxide interfaces in increasing methanol yields will be discussed.
Biography
Dr. Yomaira Pagán-Torres is a Professor of Chemical Engineering at the University of Puerto Rico at Mayaguez. She received her Ph.D. in Chemical Engineering from the University of Wisconsin-Madison in 2011, under the guidance of Prof. James Dumesic. At UW, her research focused on developing catalytic technologies for biomass conversion. Before her academic position at UPR, she worked as Senior Engineer for The Dow Chemical Company in the Feedstocks, Olefins, Chemicals, and Alternative Technologies Research and Development group in Freeport, Texas. Her research group combines materials synthesis, advanced characterization, and kinetic studies to design bifunctional heterogeneous catalysts for the activation of targeted functional groups within carbon-based feedstocks, such as lignocellulosic biomass, carbon dioxide, and plastic polymers. Her research, teaching, and service contributions have been recognized with the University of Puerto Rico-Mayagüez College of Engineering Distinguished Professor Award (2017 and 2020).
Seminar sponsored by the Department of Chemical and Biomolecular Engineering
In this talk, I will present our work on developing catalytic strategies for deoxydehydration (DODH) and hydrodeoxygenation (HDO) of carbohydrate-derived alcohols and acids to platform chemicals. Specifically, I will discuss the HDO of biomass-derived substrates, such as 1,4-anhydroerythritol, tartaric acid, and glycerol over bifunctional catalysts comprised of a supported hydrogen dissociating metal center (Pd, Rh, Pt) coupled with a redox metal oxide center (MoOx, ReOx, WOx). Our results, based on the combination of catalyst synthesis, kinetic measurements, and advanced characterization highlight the role of the noble metal, metal oxide species, and catalyst support in promoting selective C-O bond cleavage.
Overall, the Aged Mrs. Witch song stands as a captivating and imaginative piece of children's literature. It introduces young listeners to the concept of witches and magic in a fun and entertaining way. By highlighting the main idea of the witch's intriguing character, the song sparks imagination and encourages children to explore the mysteries of the supernatural realm..
Reviews for "Mrs Witch's songs: a soundtrack for life's ups and downs"
- Jane - 1 star - I found "Aged mrs witch song" to be extremely dull and uninteresting. The lyrics lacked depth and the melody was forgettable. I couldn't connect with the song on any level and it left me feeling disappointed. Overall, it was a complete miss for me and I wouldn't recommend it to anyone looking for meaningful, engaging music.
- John - 2 stars - I wasn't impressed with "Aged mrs witch song". The vocals sounded strained and the instrumentals were repetitive. It felt like a generic pop song with nothing unique or exciting to offer. I had high expectations based on the artist's previous work, but this song fell flat and failed to leave any sort of impression on me. I hope their next release is more memorable.
- Sarah - 1 star - "Aged mrs witch song" was a total letdown for me. The production quality was subpar and the lyrics were uninspiring. The whole song felt like it was trying too hard to be edgy and quirky, but it just came across as forced and unoriginal. I was disappointed because I had enjoyed the artist's previous releases, but this one missed the mark completely. I won't be adding it to my playlist anytime soon.
- Mike - 2 stars - I have to say that "Aged mrs witch song" was a disappointment. The song felt disjointed and lacked cohesion. The transitions between verses and choruses were awkward and it was difficult to follow along with the overall theme of the song. I couldn't connect with the lyrics and the melody didn't grab my attention. It's a shame because I usually enjoy this artist's music, but this particular track fell short for me.