Author Archives: Hannah Stuwe

How do you like them NAPLs? Investigating the chemical properties of pollutants

Seneca Lake in New York is known for stunning views, wine tasting, and being the lake trout capital of the world. However, a threat lies unseen in its beautiful waters. Earlier this year the Seneca Lake Pure Waters Association put out a report showing positive tests for polyfluoroalkyl substances (PFAS) in water drawn from several sites in Seneca Lake. The report provides evidence that the known PFAS contamination at the former Seneca Army Depot is spreading beyond its borders. Seneca Lake is not the only community facing this issue. In Tucson, Arizona there has been an ongoing effort to remove PFAS from groundwater since the late 2010s when it was found that PFAS contamination was stemming from two nearby Air Force facilities. At K. I. Sawyer Air Force Base in Michigan, the Air Force is monitoring PFAS contamination in the water and soil with the help of the Department of Environment, Great Lakes and Energy.

PFAS are often used to make products grease-proof, waterproof, nonstick, or flame-resistant. They are also found in firefighting foams, which are commonly used to put out fires at airports and military bases. They are also known as “forever chemicals” because they do not break down easily in the environment or the human body. PFAS have also been linked to several health problems, including certain cancers.

An additional factor becomes a concern when thinking about the impact from PFAS laden firefighting foams: non-aqueous phase liquids (NAPL). Common examples of NAPL are petroleum products, coal tars, and pesticides. In certain pollution sites there are both NAPL and PFAS present, which have the potential to interact in unexpected ways, impacting how these pollutants move through the environment, and potentially creating new NAPL-PFAS compounds of concern.

This week on ID we are interviewing Mireia Roig-Paul, a second year PhD student in Environmental and Molecular Toxicology, to learn all about these pollutants and the potential threats they pose. She studies in the laboratories of both Jennifer Fields and Serhan Mermer, and her research focuses on the intersection of PFAS and NAPLs, how they move through soil, and how they interact with each other. Tune in at 7pm on October 27th at 7 pm PST on KBVR 88.7 FM to hear all about it!

If you miss the show, you can check out the interview wherever you get your podcasts, including on our KBVR page, Spotify, and Apple Podcasts.

Pictured is Mireia Roig-Paul (provided by Mireia Roig-Paul).

Welfare, TANF, and Higher Ed: Students thrive when we remove the barriers

In 2023, the Temporary Assistance for Needy Families program (TANF) distributed aid to nearly 20,000 families, and approximately 40,000 individual recipients in the state of Oregon (FY2023 TANF Caseload). The families and individuals who receive TANF often face unseen difficulties and obstacles, especially related to higher education. This week on ID, we speak with Terese Jones, a recent PhD graduate in Human Development and Family Sciences. Terese’s dissertation work centered around TANF recipients, the challenges they face with higher education, developing a pilot program to address these challenges, and assessing the outcomes.

Terese’s research identifies many common obstacles that TANF students face, a few of which are a lack of information about resources, stigma surrounding the use of these resources, and practices and procedures that discourage students from using these resources. In the program she developed, she sought to eliminate some of these barriers. For example, she removed a requirement that certain students receiving assistance needed to provide a state issued form that tracked their class attendance, which had to be signed by their professors. This change was the most positively received component of the program among the participants because it eliminated a significantly embarrassing and uncomfortable experience for the students.

Terese found that eliminating some of the barriers the students identified allowed them to expand what is called “possible selves” which refers to the futures that students can imagine and identify as possible for themselves. Students who initially sought to become phlebotomists changed their career trajectory towards nursing when they realized they would have the support to do so. Additionally, the participants also expanded their “public selves” which refers to how they see themselves within their community/public life. Many of these students saw themselves going back to their communities as health professionals, addiction and counseling professionals, and social service and welfare professionals.

Terese says that she found herself relating to these students because she also has a background of poverty that drove her through her higher education journey. She is now continuing her work in a position at LBCC, where she is developing more programs centered around deep poverty in Linn-Benton county with the hopes of making a difference in the lives of people in our community. To learn more about Terese and her work, check out this week’s episode of ID. Also take a look at some of the resources Terese provided below!

Emergency Financial Assistance — Vina Moses Center

Family Support Program – Corvallis Public Schools Foundation (cpsfoundation.org)

South Corvallis Food Bank

The Spectacular Humpback Whales of Bahia De Banderas

Several species of humpback whales coalesce off the coast of Mexico to breed every Winter. Near Puerto Vallarta, in Bahia de Banderas (Banderas Bay), whale watching tours are abundant and the primary mode of transportation in this area is by water taxi. Water traffic is busy and this causes a unique risk for humpback whales in this region, particularly the Central American humpback which is endangered and the Mexican humpback which is threatened. These whales are at risk of boat strikes or entanglements in fishing nets, which could potentially be a factor in their low population growth rates. This is the central issue at the center of Charlene Perez Santos’ research. Charlene is a first year Masters student at OSU, working within the Marine Mammal Institute. Her work focuses on tracking humpback whale movement via satellite tags and comparing them with sea vessel routes in Bahia de Banderas in relation to habitat use and exposure to human impacts.

Charlene has had a passion to work with marine mammals since day one. She was born and raised in Puerto Rico, where she also attended the University of Puerto Rico. While completing her bachelor’s degree in marine biology and wildlife management, she sought out any opportunity she could to engage in research. Despite her passion for marine mammal research, she got involved in research experiences involving a variety of sea-adjacent animals and non-adjacent animals (including anoles) simply to gain as much experience as possible. Charlene was also the first Puerto Rican to receive the coveted NOAA IN FISH internship, which led to her establishing connections at OSU and eventually starting in the grad program here.

Tune in Sunday, March 3rd to listen to Charlene’s interview live, or catch it online and learn all about humpback whales, navigating the science community as a Latina woman, and chasing your dreams.

Exploding Cheeses and Microbes at Work

For those of us who consume dairy products, we often don’t give much thought to the trials and tribulations that had to be faced to get that product on the grocery shelves. It’s probably a fair assumption to say that most of us have never considered that cheese could explode, but that is the center of Madeleine Enriquez’s graduate research.

Madeleine (Maddie) is a master’s student in the laboratory of Joy Waite-Cusic, and she investigates dairy microbiology and spoilage, particularly mitigating “gas defects” in cheese. In semi-hard to hard cheeses certain microorganisms can cause build-up of gasses called “gas defects” which can eventually lead to blow-outs of the cheese in its packaging, or significant structural defects within the cheese (think Swiss cheese holes where they’re not supposed to be). Maddie works on practical and easy ways to mitigate these gas defects for small dairy farmers. Some of the variables include aging temperature, bioprotective cultures, or combinations of both.

Maddie’s interest in this particular area of food science originally stemmed from her grandfather, who was a dairy farmer. She went to the University of Connecticut for her bachelor’s degree in animal science. While there she participated in undergraduate research on dairy farms, particularly focusing on dairy microbiology later in her degree. This eventually led to her coming to Oregon State to further her education in dairy food science.

If you want to hear more about exploding cheese, making gouda on a weekly basis, and strapping wheels of cheese in for a CT scan, tune in for this episode of ID airing live on Jan 21, 2024.

Forever Chemicals: How can we better detect PFAS?

Per and polyfluoroalkyl substances, also known as PFAS, are widely used, long lasting chemicals, components of which break down very slowly over time. This is why you may have heard these substances called “forever chemicals.” Because of their widespread use in anything from firefighting foams to non-stick pan coating, and their persistence in the environment, many PFAS are found in the blood of people and animals all over the world. PFAS are found in water, air, fish, and soil at locations across the world and have been linked to harmful health effects, including various forms of cancer. However, the toxicity of these substances are not fully understood.

There are thousands of PFAS chemicals, and they are found in many different consumer, commercial, and industrial products, making it challenging to study and assess the potential human health and environmental risks. Additionally, it is challenging to accurately detect and quantify PFAS levels in environmental samples.

Esteban Hernandez is a chemistry PhD student conducting his research in the lab of Jennifer Field in the department of Environmental and Molecular Toxicology. His research focuses on developing fast and accurate detection techniques for PFAS. Specifically, he utilizes nuclear magnetic resonance spectroscopy (NMR), which provides an alternative to the canonical methods of PFAS detection such as mass spectroscopy. Esteban has found that utilizing NMR this way allows for detection of different varieties of PFAS, which had previously not been detectable with other methods. This has big implications for the field of PFAS research and environmental testing.

Esteban comes from a part of North Carolina that has been highly impacted by environmental PFAS contamination, sporting the title of the second worst drinking water in the country behind Flint, Michigan. His research has a very personal connection to his history and where he comes from. However, researching forever chemicals was not always his plan. He started his undergraduate journey as a theater major at Mars Hill University, eventually finding his way to chemistry and the University of North Carolina. In his undergraduate research at UNC he worked on developing an estrogen analog to help treat breast cancer. During his masters (also at UNC) he worked on synthesizing an anticancer compound originally found in sea cucumbers from the sea of Japan. Even when he came to OSU he didn’t initially think he would be working on PFAS detection. When he joined the Field lab, and consequently the field of PFAS research, he found the right fit for him. Tune in to Inspiration Dissemination this week to hear all about Esteban’s research and pathway to graduate school.