Modal abundances of CAIs: Implications for bulk chondrite element abundances and fractionations

Modal abundances of Ca,Al-rich inclusions (CAIs) are poorly known and reported data scatter across large ranges. We combine reported CAI modal abundances and our own set, and present a complete list of CAI modal abundances in carbonaceous chondrites. This includes (in area%): CV: 2.98, CM: 1.21, Acfer 094: 1.12, CO: 0.99, CK/CV (Ningqiang & DaG 055): 0.77, CK: 0.2, CR: 0.12 and CB: 0.1. CAIs are Poisson distributed and if only small areas (<1000 mm2) are studied, the data are probably not representative of the true CAI modal abundances, explaining their reported large scatter in a single chondrite group. Carbonaceous chondrites have excess bulk Al concentrations when compared to the CI-chondritic value. We find a correlation between this excess and CAI modal abundances and conclude that the excess Al was delivered by CAIs. The excess Al is only a minor fraction (usually ~10 rel%, but 25 rel% in case of CVs) of the bulk chondrite Al and cannot have contributed much 26Al to heat the chondrite parent body. Ordinary, enstatite, R- and K-chondrites have an Al deficit relative to CI chondrites and only very low CAI modal abundances, if any are present at all. Carbonaceous chondrites also had an initial Al deficit if the contribution of Al delivered by CAIs is subtracted. Therefore all chondrites probably lost a refractory rich high-T component. Only minor amounts of CAIs are present in the matrix or have been present in the chondrule precursor aggregates. Most CAI size distributions contain more than one size population, indicating that CAIs from within a single meteorite group had different origins.Comment: Meteoritics & Planetary Sciences (in press

Environmental symbol recognition across neurologically damaged and non-damaged individuals: Building a case for the Environmental Symbol Recognition Test

Research suggests that patients with aphasia perform significantly poorer than neurologically normal subjects in all areas of symbolic recognition except for via iconographic symbols. This work is an expansion of a previous study on an environmental symbol recognition test (ESRT). Stimuli on the ESRT include company logos, highway signs, and environment ideograms. Results indicate a significant difference in performance between the neurologically normal (N=41) and neurologically impaired (N=82). Between group comparisons were also found to be significant (i.e. TBI, L Hemisphere w/aphasia). Further, comparison with Aphasia Diagnostic Profile (ADP) performance for a subset of neurologically impaired subjects, yielded significant correlations between ADP subtests and the ESRT score

The Investigation of Treatment Outcomes for Adults with Chronic Brain Injury following Intensive Multidisciplinary Treatment

Following efficacy research supporting intensive treatment in chronic brain injury, this study investigated an interdepartmental, university-based, intensive treatment program. Eighteen participants composed the Intensive, Weekly and No Treatment groups. Results suggested that the Intensive Group incurred significant gains on the CADL-2 with the strongest communication gains 6 weeks post treatment. Additionally, the Intensive Group reported more daily post-treatment happiness and communication satisfaction than the Weekly Group with improved ambulation following 3 weeks of modified Tai Chi. Results suggest that university training programs may offer an effective, cost-effective service delivery option for this population

Spitzer reveals what's behind Orion's Bar

We present Spitzer Space Telescope observations of 11 regions SE of the Bright Bar in the Orion Nebula, along a radial from the exciting star theta1OriC, extending from 2.6 to 12.1'. Our Cycle 5 programme obtained deep spectra with matching IRS short-high (SH) and long-high (LH) aperture grid patterns. Most previous IR missions observed only the inner few arcmin. Orion is the benchmark for studies of the ISM particularly for elemental abundances. Spitzer observations provide a unique perspective on the Ne and S abundances by virtue of observing the dominant ionization states of Ne (Ne+, Ne++) and S (S++, S3+) in Orion and H II regions in general. The Ne/H abundance ratio is especially well determined, with a value of (1.01+/-0.08)E-4. We obtained corresponding new ground-based spectra at CTIO. These optical data are used to estimate the electron temperature, electron density, optical extinction, and the S+/S++ ratio at each of our Spitzer positions. That permits an adjustment for the total gas-phase S abundance because no S+ line is observed by Spitzer. The gas-phase S/H abundance ratio is (7.68+/-0.30)E-6. The Ne/S abundance ratio may be determined even when the weaker hydrogen line, H(7-6) here, is not measured. The mean value, adjusted for the optical S+/S++ ratio, is Ne/S = 13.0+/-0.6. We derive the electron density versus distance from theta1OriC for [S III] and [S II]. Both distributions are for the most part decreasing with increasing distance. A dramatic find is the presence of high-ionization Ne++ all the way to the outer optical boundary ~12' from theta1OriC. This IR result is robust, whereas the optical evidence from observations of high-ionization species (e.g. O++) at the outer optical boundary suffers uncertainty because of scattering of emission from the much brighter inner Huygens Region.Comment: 60 pages, 16 figures, 10 tables. MNRAS accepte

Immunocytochemical localization of the neural-specific regulatory subunit of the type II cyclic AMP-dependent protein kinase to postsynaptic structures in the rat brain.

The cellular and subcellular distribution of a major cyclic AMP binding protein in the central nervous system, the neural-specific regulatory subunit of the type II cyclic AMP-dependent protein kinase (RII-B), was analyzed in rat brains with light and electron microscopic immunocytochemical methods. The distribution of the non-neural isoform of the regulatory subunit of the enzyme (RII-H) was also analyzed. It was found that RII-B immunoreactivity was predominantly localized to neurons whereas glial and endothelial cells were unlabeled. In the neurons the RII-B immunoreactivity occurred in the perikaryal cytoplasm and in the dendrites; there was no significant accumulation of immunoreaction product in nuclei, myelinated axons and axon terminals. Although immunoreactivity was never detected in axon terminals, it was characteristically associated with the postsynaptic densities and the surrounding non-synaptic sites in somata, dendrites and dendritic spines. The localization of RII-B antigenic sites did not show specificity to any type of neuron or synapse, but the amount of immunoreactivity varied. The distribution of RII-H immunoreactivity was similar to that of RII-B except that RII-H immunoreaction product was also observed in glial cells and occurred more frequently in myelinated axons. Our data confirm that RII-B is one of the major cyclic AMP binding proteins in neurons, and provide morphological support for the involvement of the type II cyclic AMP-dependent protein kinase in postsynaptic neural functions

Utilizing the "Experience Sampling Method" to Monitor Communicative Quality of Life During Treatment for a Single Subject with Chronic Aphasia

Research in chronic aphasia typically incorporates Quality of Life measures to determine functional outcomes of treatment. This single subject study utilizes the Experience Sampling Method (ESM) in which the 75 year old, one year post CVA subject responds to 4-5 questions on a Palm Tungsten Personal Data Assistant (PDA) at the end of each activity during an intensive treatment program. Comparison of responses to the 10 treatment activities suggests that responses regarding the perception of communication and stress were the most negative, but, that less structured activities were more stressful than those communicatively focused. Theoretical and clinical findings will be discussed

The Relationship Between a CFO\u27s Financial Expertise and Firm Profitability

More than 50% of small businesses fail by the 5th year of operation because of lack of economic sustainability. Organizations without a chief financial officer (CFO) with financial expertise may have suboptimal fiscal performance. The purpose of this correlational study was to examine whether there was a relationship between CFO licensure status, CFO age, and firm earnings per share. A sample of 403 small businesses in the United States, taken from the Russell 2000 Index, was used in the study. The theoretical framework for the study was Penrose\u27s resource-based view of the firm. CFO names and firm earnings per share were taken from the 2015 SEC 10-K filings. CPAverify was used to determine specific CFO licensure status. LexisNexis was used to identify CFO age. Multiple linear regression was used to examine the relationship between CFO licensure status, CFO age, and firm earnings per share. A multiple regression model with F(2, 400) = 3.69, p = .03, R2 = .018 demonstrated a relationship between CFO licensure status, CFO age, and firm earnings per share ratio. Having a CPA license F(1, 154) = 8.59, p = .01, R2 = .053 revealed a slightly better correlation between licensure status and firm earnings per share. CFO age F(1, 401) = 3.10, p = .08, R2 = .005 revealed no relationship to firm earnings per share. Small business leaders could use this study\u27s findings as the basis for hiring CFOs with financial expertise. Doing so may help increase the firm\u27s profitability and mitigate the risks of business failure. Positive social change may ensue provided small businesses use this study\u27s findings to improve job retention and the economic viability of a community