Wen-Yee Lee

Wen-Yee Lee
University of Texas at El Paso | UTEP · Department of Chemistry

Ph.D.

About

61
Publications
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1,351
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Publications

Publications (61)
Article
The objective of the current study is to evaluate both the positive and negative effects of manganese-doped graphene quantum dots (GQD-Mn) on Capsicum annuum L. grown under salt stress. GQD-Mn was synthesized, characterized, and foliar-applied (250 mg/L, 125 mg/L, 62.5 mg/L) to C. annuum L. before and after the flowering stage, during which 100 mM...
Article
Through the applications of recycling sewage sludge to soils as nutrients, bisphenol A (BPA) and titanium dioxide nanoparticles (TiO2-NPs) are commonly found in the agricultural environment. Previous studies have reported that BPA and nanoparticles are harmful to the environment. However, the combined toxicity of both compounds is not yet understoo...
Preprint
Full-text available
This work presents the most extensive proteomic description of Arabidopsis thaliana in the knowledge of its responses to BPA and TiO 2 -NPs. Previous studies have reported that nanoparticles (NPs) and Bisphenol A (BPA) are toxic to the environment. However, the jointed toxicity is not yet well understood. This study was aimed to investigate the com...
Article
Full-text available
Prostate cancer is the second leading cause of cancer death in men in the developed world. A more sensitive and specific detection strategy for lethal prostate cancer beyond serum prostate specific antigen (PSA) population screening is urgently needed. Diagnosis by canine olfaction, using dogs trained to detect cancer by smell, has been shown to be...
Preprint
Full-text available
Prostate cancer is the second leading cause of cancer death in men in the developed world. A more sensitive and specific detection strategy for lethal prostate cancer beyond serum prostate specific antigen (PSA) population screening is urgently needed. Diagnosis by canine olfaction, using dogs trained to detect cancer by smell, has been shown to be...
Article
Room temperature photolysis of the bis(azide)cobaltate(II) complex [Na(THF) x ][(ketguan)Co(N3)2] (ketguan = [(tBu2CN)C(NDipp)2]-, Dipp = 2,6-diisopropylphenyl) (3a) in THF cleanly forms the binuclear cobalt nitride Na(THF)4{[(ketguan)Co(N3)]2(μ-N)} (1). Compound 1 represents the first example of an isolable, bimetallic cobalt nitride complex, and...
Preprint
Room temperature photolysis of the bis(azide)cobaltate(II) complex [Na(THF)<sub>x</sub>][(<sup>ket</sup>guan)Co(N3)2] (<sup>ket</sup>guan = [(tBu2CN)C(NDipp)2]–, Dipp = 2,6-diisopropylphenyl) (3a) in THF cleanly forms the binuclear cobalt nitride [Na(THF)4{[(<sup>ket</sup>guan)Co(N3)]2(μ-N)}]<sub>n</sub> (1). Compound 1 represents the first example...
Article
Two electron‐reduction of the Ti(IV) guanidinate complex (ImDippN)(Xyketguan)TiCl2 gives (η6‐ImDippN)(xyketguan)Ti (1intra) and (ImDippN)(Xyketguan)Ti(η6‐C6H6) (1inter) (xyketguan = [(tBuC=N)C(NXylyl)2]‐, Xylyl = 2,5‐dimethylphenyl) in the absence or presence of benzene, respectively. These complexes have been found to hydrogenate monocyclic and po...
Preprint
p>Two electron-reduction of the Ti(IV) guanidinate complex (Im<sup>Dipp</sup>N)(<sup>Xyket</sup>guan)TiCl<sub>2</sub> gives (η<sup>6</sup>-Im<sup>Dipp</sup>N)(<sup>xyket</sup>guan)Ti (1<sup>intra</sup>) and (Im<sup>Dipp</sup>N)(<sup>Xyket</sup>guan)Ti(η<sup>6</sup>-C<sub>6</sub>H<sub>6</sub>) (1<sup>inter</sup>) (<sup>xyket</sup>guan = [(<sup>t</su...
Article
Full-text available
Background. The worldwide emergence of multi-drug resistant bacteria has become a health crisis, as fewer or sometimes no antimicrobial agents are effective against these bacteria. The Rio Grande River is the natural boundary between the United States (US) and Mexico. It spans a border region between Texas, New Mexico and Mexico. Underserved popula...
Article
Full-text available
Cancer is one of the most devastating human diseases that causes a great number of mortalities each year worldwide. Thus, finding and treating cancers early is of increasing interest to the public and presents great opportunity for research. It is well known that the metabolism of cancer cells differs from that of normal tissues. Analysis of volati...
Article
Bisphenol A (BPA) is an endocrine disrupting compound (EDC) of emerging concern because of its capability to mimic hormonal functions causing adverse health effects in human and aquatic life. Due to its ubiquitous presence in air, water, and soil, the removal of BPA from the environment has become a pressing issue. This study investigated promising...
Article
Background: Prostate cancer (PCa) screening using serum prostate-specific antigen (PSA) testing has caused unnecessary biopsies and overdiagnosis owing to its low accuracy and reliability. Therefore, there is an increased interest in identifying better PCa biomarkers. Studies showed that trained dogs can discriminate patients with PCa from unaffec...
Article
There are eight bisphenol analogues being identified and characterized; among them, bisphenol A (BPA) is on the priority list on the basis of its higher level of uses, occurrence, and toxicity. The endocrine system interfered by BPA has been inventoried as it has the same function as the natural hormone 17β-estradiol and binds mainly to the estroge...
Article
There are eight bisphenol analogues being identified and characterized; among them, bisphenol A (BPA) is on the priority list on the basis of its higher level of uses, occurrence, and toxicity. The endocrine system interfered by BPA has been inventoried as it has the same function as the natural hormone 17β-estradiol and binds mainly to the estroge...
Article
Full-text available
Bisphenol A (BPA) and nonylphenols (NPs), with a high potential to cause endocrine disruption, have been identified at levels of nanograms per liter and even micrograms per liter in effluents from wastewater treatment plants. Constructed wetlands (CWs) are a cost-effective wastewater treatment alternative due to the low operational cost, reduced en...
Article
It has been recognized that numerous synthetic compounds like Bisphenol A (BPA) and nonylphenols (NP) are present in effluents from wastewater treatment plants (WWTP) at levels of parts per billion (μg L-1) or even parts per trillion (ng L-1) with a high potential to cause endocrine disruption in the aquatic environment. Constructed wetlands (CW) a...
Article
Cerium oxide nanoparticles (nCeO2) have been shown to have significant interactions in plants; however, there are limited reports on their impacts in rice (Oryza sativa). Given the widespread environmental dispersal of nCeO2, it is paramount to understand its biochemical and molecular impacts on a globally-important agricultural crop such as rice....
Article
Despite the remarkable number of literature on the interaction of engineered nanoparticles (ENPs) with plants, our knowledge on the implications of ENPs in the nutritional value of food crops is still limited. This research was performed to study the quality of rice grains harvested from plants grown in soil treated with cerium oxide nanoparticles...
Patent
Full-text available
A method of estimating the amount of unreacted starting materials (glycerides, methyl esters, etc.) and the composition of a biodiesel using TLC in conjunction with a lipophilic dye, Nile Red is described herein. The dye based TLC method of the present invention is convenient and provides significant advantages over existing methods for estimating...
Article
A comprehensive investigation of polybromodiphenyl ethers (PBDEs) in wastewater was conducted in the second largest international metroplex area along the U.S. and Mexico (MX) border. Concentrations of PBDEs in wastewater and sludge were measured in four wastewater treatment plants (WWTPs) in El Paso, Texas and two WWTPs in Cd. Juarez, Chihuahua, M...
Conference Paper
The changes in the metabolic processes caused by cancer lead to the formation and/or increased concentration of volatile organic compounds (VOCs) in the human body. These VOCs found in urine can serve as markers for cancer. This study is to develop an analytical method to detect VOCs in urine using Stir Bar Sorptive Extraction (SBSE) along with The...
Conference Paper
Accidental release of commercialized fossil fuels—gasoline, diesel, and biodiesel— through its processing and handling has posed a threat to the aquatic environment. Studies have shown that constituents of these fuels can cause adverse health effects on aquatic organisms at various small concentrations. Due to the continuing dependency of these fue...
Conference Paper
Organochlorine Pesticides (OCs) are classified as persistent organic pollutants (POPs). They have been found to bioaccumulate in organisms. These chemicals tend to attach to fatty tissues in animals and humans, remaining in them for long periods of time. OCs may be responsible for a vast number of health conditions including neurological disorders,...
Conference Paper
The concern about the impacts of endocrine disrupting compounds (EDCs) in the environment has increased recently with their high occurrence in surface waters and sex changes in various aquatic organisms. EDCs include ubiquitously used pharmaceuticals and personal care products, such as soap, detergents, contraceptives, and other medicines, which ar...
Conference Paper
Background/Question/Methods The concern about the impacts of endocrine disrupting compounds (EDCs) in the environment has increased recently with their high occurrence in surface waters and sex changes in various aquatic organisms. EDC’s include ubiquitously used pharmaceuticals and personal care products, such as soap, detergents, contraceptives,...
Article
A concurrent comparison of the concentration, occurrence, and removal efficiency of polybrominated diphenyl ethers (PBDEs) in wastewater from primary, secondary and tertiary wastewater treatment plants was examined. The study area was composed of all three types of wastewater treatment plants in two countries, the United States of America and Mexic...
Article
The Paharpur Business Center in New Delhi, India uses a range of air-cleaning technologies including air washers, ultraviolet light treatment, and plants located in a rooftop greenhouse and distributed throughout the building. Indoor air quality measurements found increasing chemical concentrations as air passes through the building, indicating the...
Article
A simple, cost effective, and yet sensitive sample preparation technique was investigated for determining Polycyclic Aromatic Hydrocarbons (PAHs) in solid samples. The method comprises ultrasonic extraction, Stir Bar Sorptive Extraction (SBSE), and thermal desorption-gas chromatography-mass spectrometry to increase analytical capacity in laboratori...
Article
As a first example of opening a secondary aziridine with a tertiary carbanion, the title amines (3a-c, aryl = phenyl, 4-tert-butylphenyl,2-naphthyl) were synthesized by opening N-(diphenylphosphinoyl)-7-azabicyclo[4.1.0]heptane, aziridine 1, with the corresponding alpha-potassium isopropylarenes, followed by a hydrolysis of the resulting phosphinam...
Article
The assay described here represents an improved yeast bioassay that provides a rapid yet sensitive screening method for EDCs with very little hands-on time and without the need for sample preparation. Traditional receptor-mediated reporter assays in yeast were performed twelve to twenty four hours after ligand addition, used colorimetric substrates...
Conference Paper
Endocrine disruptor compounds (EDCs), such as estradiol (E2), estrone (E1) and alkylphenols, present analytical challenges in complex matrices at low levels (ng L-1). Even with a complete chemical characterization, it is not possible to anticipate net estrogenic effect due to simultaneous presence of many other trace organic residuals in treated wa...
Conference Paper
Students registered in first or second semester General Chemistry courses at the University of Texas at El Paso (UTEP) are also enrolled in a Peer-Led workshop. The Peer-Led Team Learning (PLTL) program is a student-directed intervention overseen by an undergraduate student (the peer leader) who has a deep understanding of the chemistry content and...
Conference Paper
Pharmaceuticals and Personal Care Products (PPCPs) are emerging pollutants of concern that are found in 80% of our water system. PPCPs are in products used for daily activities such as household cleaning materials, prescription medication, and personal hygiene products, which are then released into wastewater. Currently, wastewater treatment facili...
Conference Paper
The ‘free-style’ nature of the chemistry Peer-Led Team Learning (PLTL) Program at the University of Texas at El Paso (UTEP) motivates Peer Leaders to create new team-based learning activities that make chemistry more appealing, involve team work, and facilitate student understanding. The Chemistry Peer Leader Program at UTEP received the 2006 S...
Conference Paper
The University of Texas at El Paso (UTEP) incorporated Peer-Led Team Learning (PLTL) into the first semester general chemistry course starting in fall 2000. This student-directed intervention has increased the passing rate from about 53% to above 65%. In the PLTL Program at UTEP, all students are enrolled in small workshop sections with each se...
Conference Paper
The Peer-Led Team Learning (PLTL) Program at the University of Texas at El Paso provides an interactive approach to assist the students in learning general chemistry. For increasing the first semester passing rate (from about 53% to more than 65%) and improving student success at the undergraduate level, the Program was recognized by receiving...
Conference Paper
Several endocrine disrupting compounds (EDCs)-estrone (E1), estradiol (E2), nonyphenols (NP), and bisphenol A (BPA)-are commonly present in the influent and effluent from wastewater treatment plants. Studies have shown that these compounds can have adverse effects (e.g. reproduction and developmental effects) on aquatic organisms, even at very low...
Article
Organochlorine Pesticides (OCs) are classified as persistent organic pollutants (POPs). They have been found to bioaccumulate in organisms over time. These chemicals tend to attach to fatty tissues in animals and humans, remaining for long periods of time. OCs may be responsible for a vast number of health conditions including neurological disorder...
Article
Particulate matter less than 10 microm (PM10) has been shown to be associated with aggravation of asthma and respiratory and cardiopulmonary morbidity. There is also great interest in the potential health effects of PM2.5. Particulate matter (PM) varies in composition both spatially and temporally depending on the source, location and seasonal cond...
Chapter
Studies of the interference of polycyclic aromatic hydrocarbons (PAHs) on the uptake of copper (Cu) and zinc (Zn) by alfalfa (Medicago sativa) were investigated. Alfalfa plants were treated with three PAH compounds individually at 50mg·kg–1(soil dry weight) along with Zn and/or Cu. The concentrations of metals were 35mg·kg–1(soil dry weight) for Zn...
Article
Ultrasonic extraction followed by Stir Bar Sorptive Extraction (SBSE) and thermal desorption inline coupled with Gas Chromatography and Mass Spectrometry (TD/GC/MS) was used to perform a comprehensive determination of soil-borne polycyclic aromatic hydrocarbons (PAHs) in El Paso, Texas. The method provided good sensitivity and faster processing tim...
Article
Carbonaceous particulate matter (PM) was collected by both thermal precipitation and glass fiber filters from specific combustion sources and examined by transmission electron microscopy (TEM) and field emission scanning electron microscopy (FESEM). PM from various natural gas burner combustion regimes (NGPM), burning tires (TPM), a heavy duty dies...
Article
This paper characterizes polycyclic aromatic hydrocarbon (PAH) concentrations in 8 Hispanic households in which traditional Mexican courses are prepared. Integrated 3-hr and 21hr average indoor PAH samples were collected at these residences (5 in Cd. Juarez, Chihuahua and 3 in El Paso, Texas) in the winter of 2004 and spring of 2005. Total PAHs wer...
Article
It has been observed that plants are susceptible to uptake from soil and in planta transport of technical chlordane, in spite of its hydrophobicity and sequestration within the soil matrix due to weathering. Field and rhizotron studies were conducted with Cucurbitaceae planted in highly weathered, chlordane-contaminated soil to investigate details...
Article
In order to assess fully the impact of persistent organic pollutants (POPs) on human health, pollutant exchange at the interface between terrestrial plants, in particular food crops, and other environmental compartments must be thoroughly understood. In this regard, transfers of multicomponent and chiral pollutants are particularly informative. In...
Article
Experiments were conducted to assess the effect of seven organic acids [succinic, tartaric, malic, malonic, oxalic, citric, ethylene-diaminetetraacetic (EDTA)] over a concentration range of two orders of magnitude (0.001-0.10 M) on the abiotic desorption of weathered p,p'-DDE and the extraction of polyvalent inorganic ions from soil. At 0.05 M all...
Article
The half-lives of some persistent organic pollutants (POPs) in environmental compartments such as soil and air can be as long as decades. In spite of the hydrophobicity of many POPs, the literature contains reports of their uptake by, and translocation through, a variety of plants. Both these observations prompt the investigation of whether a veget...
Article
The half-lives of some persistent organic pollutants (POPs) in environmental compartments such as soil and air can be as long as decades. In spite of the hydrophobicity of many POPs, the literature contains reports of their uptake by, and translocation through, a variety of plants. Both these observations prompt the investigation of whether a veget...
Article
The half-lives of some persistent organic pollutants (POPs) in environmental compartments such as soil and air can be as long as decades. In spite of the hydrophobicity of many POPs, the literature contains reports of their uptake by, and translocation through, a variety of plants. Both these observations prompt the investigation of whether a veget...
Article
The purpose of this experiment was to demonstrate the benefits of using a United States Environmental Protection Agency (U.S. EPA)-approved method in an environmental chemistry course. The method selected involved the use of a combination fluoride electrode to determine the fluoride concentration in drinking water. Although it is beneficial to teet...
Article
[GRAPHICS] As a first example of opening a secondary aziridine with a tertiary carbanion, the title amines (3a-c, aryl = phenyl, 4-tert-butylphenyl, 2-naphthyl) were synthesized by opening N-(diphenylphosphinoyl)-7-azabicyclo[4.1.0]heptane, aziridine 1, with the corresponding alpha-potassium isopropylarenes, followed by hydrolysis of the resulting...
Article
Full-text available
A commercial pharmaceutical analysis chiral method development kit (Chirex Column Kit A, Phenomenex) was used to analyze six pesticide stereoisomer mixtures. The pesticides were selected from the 1994-1995 National Water Quality Assessment Program (NAWQA) covering New Mexico and Texas. Three stereoisomer mixtures were separable on three different c...
Article
When a molecule is asymmetric (chiral), it can have a non-superposable mirror image, or enantiomer. Because organisms constitute an asymmetric (chiral) environment and most enzymatic pathways are stereoselective, organisms selectively metabolize and accumulate chiral compounds. Therefore, the biological activities and properties of the two enantiom...
Article
Thesis (M.S.)--University of Texas at El Paso, 1995. Vita. Bibliography: leaves 43-45.

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Projects (4)
Project
To identify and characterize the presence of antibiotic resistant genes of Extended Spectrum Beta Lactamase Bacteria (ESBLs), CRE, integrons, and antimicrobial residues in the Rio Grande River.
Archived project
Project
To study cancer specific volatile organic pollutants in urine to develop predictive model for diagnosis