We use reflection-absorption infrared spectroscopy (RAIRS) to study the photochemistry of NO on Cu(110) in the UV-visible range. We observe that the only photoactive species of NO on Cu(110) is the NO dimer, which is asymmetrically bound to the surface. RAIRS shows that photoinduced dissociation proceeds via breaking of the weak N-N bond of the dimer, photodesorbing one NO(g) to the gas phase and leaving one NO(ads) adsorbed on the surface in a metastable atop position. We model the measured wavelength-dependent cross sections assuming both electron- and hole-induced processes and find that the photochemistry can be described by either electron attachment to a level 0.3 eV above the Fermi energy E(F) or hole attachment to a level 2.2 eV below E(F). While there is no experimental or theoretical evidence for an electron attachment level so close to E(F), an occupied NO-related molecular orbital is known to exist at E(F) - 2.52 eV on the Cu(111) surface [I. Kinoshita, A. Misu, and T. Munakata, J. Chem. Phys. 102, 2970 (1995)]. We, therefore, propose that photoinduced dissociation of NO dimers on Cu(110) in the visible wavelength region proceeds by the creation of hot holes at the top of the copper d-band.
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http://dx.doi.org/10.1063/1.3664861 | DOI Listing |
J Prosthodont
January 2025
Department of Oral and Maxillofacial Surgery, Oral Medicine and Periodontology, School of Dentistry, University of Jordan, Amman, Jordan.
Purpose: To examine the impact of placing plain and impregnated retraction cords for two different retraction times on the postoperative gingival margin level and periodontal health.
Materials And Methods: A total of 40 endodontically treated mandibular first molars were selected and randomly allocated into four groups (n = 10/group); A: plain retraction cord for 10 min, B: plain retraction cord, 20 min, C: impregnated (25% aluminum chloride (AlCl) retraction cord, 10 min, D: impregnated retraction cord (25% AlCl), 20 min. Intraoral digital scans were acquired, and periodontal parameters (Plaque index [PI], Bleeding on probing [BOP], and probing depth [PD]) were assessed at baseline, 7 days, and 28 days after retraction.
Environ Sci Pollut Res Int
January 2025
Department of Environmental Management, College of Agricultural and Environmental Sciences, Makerere University, P.O. Box 7062, Kampala, Uganda.
Aquaculture generates substantial amount of residual feeds and faecal matter that accumulate in the culture environment and pollute effluent-receiving water, diminishing its ecological functioning. To devise means of treating nutrient-rich aquaculture wastewater, the efficiency of integrated papyrus-bivalve mesocosms in removing nutrients was evaluated. The mesocosms were fed on water (6600 L) from one brood-stock pond and allowed to settle for 2 weeks.
View Article and Find Full Text PDFHarv Rev Psychiatry
January 2025
From McLean Hospital (Mr. Mermin and Dr. Choi-Kain) Belmont, MA; Harvard College (Ms. Steigerwald); Harvard Medical School (Dr. Choi-Kain).
Borderline personality disorder (BPD) has been described as a condition of intolerance of aloneness. This characteristic drives distinguishing criteria, such as frantic efforts to avoid abandonment. Both BPD and loneliness are linked with elevated mortality risk and multiple negative health outcomes.
View Article and Find Full Text PDFArch Womens Ment Health
January 2025
Centre of Excellence in Early Intervention and Family Studies, Department of Psychology, University of Copenhagen, Øster Farimagsgade 2A, Copenhagen K, DK-1353, Denmark.
Purpose: This study investigated whether maternal antenatal attachment (MAA) in the third trimester was associated with self-reported problematic infant crying at eight weeks postnatally and explored links with postnatal depressive symptoms.
Methods: A prospective cohort study was conducted with 1287 pregnant participants in Danish general practice. MAA was measured using the Maternal Antenatal Attachment Scale (MAAS) in the third trimester.
Phys Eng Sci Med
January 2025
RF Longevity, 428 E. Thunderbird Road, Phoenix, SE, AZ, 85022, USA.
We have previously shown in small studies that full brain Transcranial Radiofrequency Wave Treatment (TRFT) to subjects with Alzheimer's Disease could stop and reverse their cognitive decline. An 8-emitter head device, the "MemorEM", was used in these studies to provide TRFT at 915 MHz frequency and power level of 1.6 W/kg Specific Absorption Rate (SAR) during daily 1-hour treatments.
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