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Cyclohexane (CAS: 110-82-7), a colorless organic solvent derived from petroleum, is a valuable reference standard for Raman shift calibration and serves as a model for six-membered ring structures in complex chemical and biological systems. In this study, we measured polarized Raman spectra of gaseous cyclohexane at room temperature using cavity-enhanced Raman spectroscopy (CERS) across the range of 200-3200 cm. The observed vibrational wavenumbers, intensities, and depolarization ratios were compared with calculated values, enabling the assignment of several dozen Raman-active bands, including many overtone and combination bands. This work demonstrates the capability of CERS for vibrational analysis of gas-phase polyatomic molecules.
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http://dx.doi.org/10.1021/acs.jpca.4c07709 | DOI Listing |
Anal Chem
September 2025
Department of Laboratory Medicine, Fujian Medical University, Fuzhou 350004, China.
Acute lymphoblastic leukemia (ALL) is the most common hematologic malignancy in children. Current clinical diagnosis primarily relies on invasive detection methods, while molecular subtyping remains a complex and time-consuming process. This study innovatively employed silver nanoparticle-based surface-enhanced Raman spectroscopy (SERS) technology to systematically analyze 116 serum samples, including those with breakpoint cluster region-Abelson (-) fusion genotype, mixed-lineage leukemia (, also known as lysine methyltransferase 2A, ) gene rearrangement subtype, T-lymphoblastic ALL, and healthy controls.
View Article and Find Full Text PDFPhys Chem Chem Phys
September 2025
The Extreme Light Infrastructure ERIC, ELI Beamlines Facility, Za Radnicí 835, Dolní Břežany, Czech Republic.
The significance of carotenoids in biological systems cannot be overstated. Their functionality largely arises from unique excited-state dynamics, where photon absorption promotes the molecule to the optically allowed 1B+u state (conventionally S), which rapidly decays to the optically forbidden 2A-g state (S). While the vibrational signature of the S state is well established, that of the initial S state has remained elusive.
View Article and Find Full Text PDFDysphagia
September 2025
Department of Occupational Therapy, CNC Purun Hospital, Cheongju, Chungcheongbuk-do, Republic of Korea.
This study examined the effects of vibratory stimulation on swallowing-related muscle strength in patients with dysphagia due to stroke, using three types of stimulators and a systematic exercise program. This study was conducted in two stages. In Experiment 1, we examined the effects of three types of vibratory stimulation on the pressure of the tongue and lips (N = 23).
View Article and Find Full Text PDFInt Arch Occup Environ Health
September 2025
Department of Mechanical Engineering, Politecnico di Milano, Milan, Italy.
Purpose: To investigate the role of personal risk factors in the occurrence of the vascular, neurological and fibroproliferative disorders of the hand-arm vibration syndrome (HAVS) in workers groups exposed to hand-transmitted vibration (HTV).
Methods: HAVS prevalence and incidence data were pooled across a series of cross-sectional studies (total sample: 1272 HTV workers, 579 controls) and prospective cohort studies (total sample: 377 HTV workers, 138 controls) conducted in Central and North-Eastern Italy. The pooled studies included detailed individual-level information about HTV exposure, personal risk factors, medical comorbidities and HAVS disorders.
Introduction: Distraction methods such as virtual reality and cold vibration devices (Buzzy) are recommended during vascular access. Few studies focused on distraction during intramuscular injection.
Methods: This study evaluated the effect of distraction methods on procedure-related pain, fear, and anxiety during the intramuscular injection in children aged 5 to 12 years in the pediatric emergency department.