A5011145039- Spectroscopy and Chemometric Analyses
- Spectroscopy Techniques in Biomedical and Chemical Research
- Child and Adolescent Psychosocial and Emotional Development
- Advanced Chemical Sensor Technologies
- Spectroscopy and Laser Applications
- Molecular spectroscopy and chirality
- Suicide and Self-Harm Studies
- Mindfulness and Compassion Interventions
- Water Quality Monitoring and Analysis
- Fault Detection and Control Systems
- Analytical Chemistry and Chromatography
- Tryptophan and brain disorders
- Maternal Mental Health During Pregnancy and Postpartum
- Family Support in Illness
- Substance Abuse Treatment and Outcomes
- Behavioral Health and Interventions
- Emotions and Moral Behavior
- Psychology of Moral and Emotional Judgment
- Cultural Heritage Materials Analysis
- Death Anxiety and Social Exclusion
- Hydrocarbon exploration and reservoir analysis
- Petroleum Processing and Analysis
- Cultural Differences and Values
- Community Health and Development
Ashland (United States)
1995-2018
University of California, Los Angeles
2005-2007
Marathon (United States)
1998
Old Dominion University
1995-1997
Stress is implicated in the development and progression of a broad array mental physical health disorders. Theory research on self suggest that self-affirming activities may buffer these adverse effects. This study experimentally investigated whether affirmations personal values attenuate physiological psychological stress responses. Eighty-five participants completed either value-affirmation task or control prior to participating laboratory challenge. Participants who affirmed their had...
Social support is believed to be a universally valuable resource for combating stress, yet Asians and Asian Americans report that social not helpful them, resist seeking it, are underrepresented among recipients of supportive services. We distinguish between explicit (seeking using advice emotional solace) implicit (focusing on valued groups) show psychologically biologically benefited more by than support; the reverse true European Americans. Our discussion focuses cultural differences in...
An analytical method was developed to quantitatively determine the asphaltene content in petroleum crude oils by Fourier transform infrared spectroscopy (FT-IR). Asphaltenes are a solubility class of compounds found oils. They black dark brown solids defined their insolubility n-alkane solvents. The structure molecules is polynuclear aromatic rings with alkyl side chains and heteroatoms such as nitrogen, oxygen, sulfur attached. known cause oil well plugging irreversible catalyst...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of Octane Numbers and Reid Vapor Pressure Commercial Petroleum Fuels Using FT-Raman Spectroscopy Partial Least-Squares Regression AnalysisJohn B. Cooper, Kent L. Wise, James. Groves, William T. WelchCite this: Anal. Chem. 1995, 67, 22, 4096–4100Publication Date (Print):November 15, 1995Publication History Published online1 May 2002Published inissue 15 November...
We report for the first time a direct comparison of three most common vibrational analysis techniques determination individual BTEX components (benzene, toluene, ethylbenzene, ortho-xylene, meta-xylene, and para-xylene) in blended commercial gasolines. Partial least-squares (PLS) regression models were constructed each component by using spectroscopic techniques. A minimum 120 types gasolines used training set component. Leave-one-out validation sets yields lower standard errors Raman mid-IR...
The weight percent oxygen in commercial gasoline samples has been determined by using partial least-squares (PLS) regression analysis combined with either FT-Raman, FT-IR, or dispersive near-IR spectroscopy. Calibration models were constructed the use of 33 MTBE oxygenated gasolines. minimum standard errors validation leave-one-out are 0.156, 0.188, and 0.119 wt % for near-IR, respectively. An independent test set 36 gasolines was used to further validate PLS models. prediction 0.155, 0.143,...
We report the use of a low-cost dispersive Raman instrument with charge-coupled-device (CCD) detection, near-infrared (near-IR) diode laser excitation, and remote fiber-optic sampling to analyze mock petroleum samples which contain high benzene, toluene, ethylbenzene, xylene (BTEX) concentrations. Partial least-squares regression (PLSR) analysis is used correlate individual isomer concentrations spectral signal without an internal standard. The resulting PLSR model predict concentration...
A comparison is made between an index-guided (Fabry-Perot type) diode laser and a distributed Bragg reflector (DBR) as excitation sources for fiber-optic Raman spectroscopy utilizing charge-coupled device (CCD) detection image-corrected spectrograph. The DBR was superior to the elimination of mode hopping, frequency hysteresis function both temperature current changes, reduction in broadband emission. These advantages may allow be used industrial process control applications which are too...