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This study presents two chemical abrasion-thermal ionisation mass spectrometry (CA-TIMS) U–Pb zircon ages from tuffs as well as palynostratigraphic results from the embracing sedimentary succession of the Orallo Formation, Surat Basin, Queensland. Samples were taken from two Geological Survey of Queensland (GSQ) stratigraphic holes, GSQ DRD 26 and GSQ Roma 2. Palynological results assign the upper part of the Orallo Formation to the lower part of the Ruffordiaspora australiensis Interval Zone rather than the upper part of this zone as previously indicated. A late Valanginian isotopic date of 134.38 ± 0.04 Ma from GSQ DRD 26 and an early Hauterivian date of ≤132.46 ± 0.36 Ma from GSQ Roma 2 give the Orallo Formation a Berriasian?/Valanginian–Hautevarian age, rather than the previously inferred Berriasian–Valanginian age determined without any geochronological control. Additionally, when combined with previously published geochronological dates from the Westbourne Formation, these ages suggest that, in the Surat Basin succession, the Jurassic–Cretaceous boundary most likely lies within the Gubberamunda Sandstone. Two U–Pb CA-TIMS ages of 134.38 ± 0.04 Ma and ≤132.46 ± 0.36 Ma have been found, based on zircons extracted Orallo Formation tuffs. Sediments surrounding the two tuffs the zircons were extracted from yielded palynofloras assignable to the lower part of the Ruffordiaspora australiensis Interval Zone. These dates, combined with earlier work, show the Orallo Formation to be of Berriasian?/Valanginian–Hautevarian age. [ABSTRACT FROM AUTHOR]

This study presents the first chemical abrasion-isotope dilution thermal ionisation mass spectrometry (CA-IDTIMS) U-Pb zircon ages from tuffs in Lopingian (upper Permian) strata of the Galilee Basin, Queensland and reassigns the B coal-seam to the ‘Burngrove Formation equivalent.’ Five Lopingian tuffs were dated: four from the CRD Montani-1 drill hole including three from the ‘Fair Hill Formation equivalent’ (255.13 ± 0.09, 254.41 ± 0.07 and 254.32 ± 0.10 Ma) and one from the ‘Burngrove Formation equivalent’ (252.81 ± 0.07 Ma, approximately the age of the Yarrabee Tuff in the adjacent Bowen Basin); and a single tuff from the Black Alley Shale in the GSQ Tambo-1-1A drill hole (254.09 ± 0.06 Ma). In the Galilee Basin, all three units are constituents of the Betts Creek Group, here formally elevated in nomenclatural status from the Betts Creek beds. On the western margin of the basin, the group thins, and the ‘J and K’ seams (formerly known as the Crossmore and Glenaras sequences, respectively) in the GSQ Muttaburra-1 drill hole have been interpreted through palynology as Cisuralian-early Guadalupian (spore-pollen assemblage APP3.2). This corroborates the exclusion of the ‘J and K’ seams from the overlying Lopingian Betts Creek Group (spore-pollen assemblage APP5), and the underlying lower to mid-Cisuralian Aramac Coal Measures (spore-pollen assemblage APP2.2), which represent the uppermost unit of the Joe Joe Group. It is proposed that the ‘J and K’ seams are restricted to a depocentre in the Hulton-Rand structure. The recognition of these strata containing APP3.2 spore-pollen assemblages suggests that the mid-Permian hiatus is locally reduced to 12-13 My from 30 Ma (where the ‘J and K’ seams are absent). The results of the radiometric dating and palynological analysis in the Galilee Basin support the proposed, albeit informal stratigraphy, that is given in terms of equivalents of formational units in the Bowen Basin and on the intervening Springsure Shelf. [ABSTRACT FROM AUTHOR]

Objective: This observational study examined the association between continuing outpatient care for a psychiatric disorder, a substance use disorder, or both and decreased risk of readmission to psychiatric care after an index episode of inpatient psychiatric treatment.Methods: Treatment records from all patients with co-occurring substance use and psychiatric disorders discharged from an inpatient psychiatric setting in the Department of Veterans Affairs (VA) between July 1, 2004, and June 30, 2005 (N=26,826), were used to determine the impact of psychiatric and substance use disorder continuing care on readmission to inpatient psychiatric treatment in the 90 days after discharge.Results: Over 23% (6,280 of 26,826) of patients with both a psychiatric disorder and a substance use disorder who received inpatient psychiatric treatment in the VA were readmitted for additional psychiatric care within 90 days of discharge. Survival analyses indicated that receiving continuing care for a substance use disorder (hazard ratio [HR]=.84, 95% confidence interval [CI]=.77-.92, p<.001) in the 30 days after discharge from the index episode was associated with a lower likelihood of rehospitalization. Psychiatric continuing care was not associated with risk of rehospitalization. A supplementary analysis indicated that substance use disorder continuing care was still associated with a reduced risk of rehospitalization over the 12 months after discharge, although the overall magnitude of the association was diminished (HR=.92, 95% CI=.86-.99, p=.02).Conclusions: Readmission to inpatient psychiatric treatment was common for patients with co-occurring disorders, and these observational findings indicate that continuing care for a substance use disorder was associated with lower risk of early readmission. [ABSTRACT FROM AUTHOR]

The photochemistry of 3,5,3′,4′-tetrachlorosalicylanilidc has been studied in solution under carefully controlled conditions. When irradiated in a buffered solution of pH 7.4 (physiological pH), three atoms of chlorine are liberated from the molecule instead of one as suggested by earlier photochemical work. From this observation a mechanism is proposed to explain the long-term photobiological effect of this compound in skin i.e. that of the persistent light reactor. [ABSTRACT FROM AUTHOR]

Absorption measurements were made in the ranges 1.5 to 230 Mc/sec and 0° to 45°C at various concentrations. Diethylamine solutions showed single-relaxation behavior, attributed to complex formation by hydrogen bonding. Absorption attributed to separation of phases near the lower critical solution temperature was shown in addition by triethylamine solutions. In methyl diethylamine solutions (L.C.S.T.=49°C), the transition from single- to double-relaxation behavior arising from these 2 mechanisms was observed. The absorption by n-amylamine solutions was compared with that by n-octylamine solutions, which form micelles. dμmax/dc decreased sharply at the critical micelle concentration. (μmax=maximum absorption per wavelength, c=concentration). Nine further solutes with hydrogen-bonding sites were studied. In each, the concentration for peak sound absorption (PSAC) was less than 0.5 MF, showing that more than one water molecule was associating with each solute molecular. Empirical relations between PSAC, relaxation frequency, and molecule weight were obtained. Quantitative interpretation of the measurement has been attempted in terms of models allowing for successive addition of water molecules to a complex and for breakdown of the water structure. Limiting values of bond energies, applicable to completely isothermal and adiabatic conditions, were calculated, but meaningful intermediate conditions could not be determined. [ABSTRACT FROM AUTHOR]