Publications by authors named "J J Jessop"

Photopolymerization systems provide compelling advantages for industrial applications due to their fast reaction kinetics, wide selection of monomers for physical property development, and energy-efficient initiation via illumination. These same advantages can present challenges when attempting to monitor these reactions or characterize their resulting polymers; however, Raman spectroscopy can provide the flexibility and resolution needed. In this overview, Raman spectroscopy is compared to common characterization techniques, such as photo-differential scanning calorimetry and infrared spectroscopy, highlighting advantages of Raman spectroscopy.

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Background: Anesthetic agents including ketamine and nitrous oxide have shown antidepressant properties when appropriately dosed. Our recent open-label trial of propofol, an intravenous anesthetic known to elicit transient positive mood effects, suggested that it may also produce robust and durable antidepressant effects when administered at a high dose that elicits an electroencephalographic (EEG) burst-suppression state. Here we report findings from a randomized controlled trial ( NCT03684447 ) that compared two doses of propofol.

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We investigated the role of the exercise pressor reflex (EPR) in regulating the haemodynamic response to locomotor exercise. Eight healthy participants (23 ± 3 years, : 49 ± 6 ml/kg/min) performed constant-load cycling exercise (∼36/43/52/98% ; 4 min each) without (CTRL) and with (FENT) lumbar intrathecal fentanyl attenuating group III/IV locomotor muscle afferent feedback and, thus, the EPR. To avoid different respiratory muscle metaboreflex and arterial chemoreflex activation during FENT, subjects mimicked the ventilatory response recorded during CTRL.

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Article Synopsis
  • Burst suppression is a brain state characterized by alternating high and low electrical activity, which can occur due to illness or certain anesthetics, but its variations among individuals have been underexplored.
  • In a clinical trial assessing propofol's antidepressant effects, researchers analyzed EEG data from 21 subjects with treatment-resistant depression, identifying three distinct types of burst activity: broadband bursts, sleep spindle-like activity, and low-frequency bursts (LFBs), each with unique time and frequency traits.
  • The study highlights significant individual differences in the occurrence and spectral makeup of these EEG features, suggesting the need for personalized approaches to anesthetic dosing and revealing limitations in current clinical EEG monitoring systems.
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BACKGROUND Comorbidities and polypharmacy are difficult to manage, as polypharmacy hinders identification and prevention of medication-related problems. Risk for adverse drug events (ADEs) can be minimized through pharmacogenomic (PGx) testing and related therapeutic adjustments. CASE REPORT A 70-year-old woman with comorbidities and medications enrolled in the Program of All-inclusive Care for the Elderly presented with left lower extremity (LLE) pain, generalized weakness, and major depressive disorder.

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