Isotopic constraints on the origin of meteoritic organic matter

Salient features of the isotopic distribution of H, C and N in the organic material found in carbonaceous meteorites are noted. Most organic fractions are strongly enriched in D with respect to the D/H ratio characteristic of H2 in the protosolar system; substantial variations in C-13/C-12 ratio are found among different molecular species, with oxidised species tending to be C-13 enriched relative to reduced species; some homologous series reveal systematic decrease in C-13/C-12 with increasing C number; considerable variation in N-15/N-14 ratio is observed within organic matter, though no systematic pattern to its distribution has yet emerged; no interelement correlations have been observed between isotope enrichments for the different biogenic elements. The isotopic complexity echoes the molecular diversity observed in meteoritic organic matter and suggests that the organic matter was formed by multiple processes and/or from multiple sources. However, existence of a few systematic patterns points towards survival of isotopic signatures characteristic of one or more specific processes. The widespread D enrichment implies either survival of many species of interstellar molecule or synthesis from a reservoir containing a significant interstellar component. Several of the questions raised above can be addressed by more detailed determination of the distribution of the H, C and N isotopes among different well-characterized molecular fractions. Thus, the present study is aimed at discovering whether the different amino acids have comparable D enrichments, which would imply local synthesis from a D-enriched reservoir, or very viable D enrichments, which would imply survival of some interstellar amino acids. The same approach is also being applied to polycyclic aromatic hydrocarbons. Because the analytical technique employed (secondary ion mass spectrometry) can acquire data for all three isotopic systems from each molecular fraction, any presently obscured interelement isotopic correlation should also be revealed, which will aid in identifying pertinent synthetic processes

Primordial material in meteorites

Primordial is a term which applied to material that entered the solar system early and became incorporated into a meteorite without totally losing its identity. Identification of such material surviving in meteorites is so far solely through recognition of anomalous isotopic compositions of generally macroscopic entities contained within those meteorites. Isotopic anomalies are, by definition, isotopic compositions which differ from the canonical solar system abundances in ways which cannot be explained in terms of local processes such as mass dependent fractionation, cosmic ray induced spallation or decay of radionuclides. A comprehensive account of isotopic anomalies is impractical here, so it is necessary to be selective. Issues which are potentially addressable through the study of such primordial material are examined. Those issues will be illustrated with specific, but not exhaustive, examples

Origins of organic matter in meteorites

Several abiotic chemical processes acting in several different astrophysical and cosmogonic environments have contributed to the population of organic compounds preserved in carbonaceous meteorites. Those environments include interstellar molecular clouds and the near-surface regions of asteroid-sized objects in the early solar system. There is little evidence for synthesis of organic compounds from the primordial solar-nebular gas

Research Administration around the World

The purpose of the Research Administration as a Profession (RAAAP) project was to obtain a snapshot of the research management and administration (RMA) profession around the world. This included collecting basic demographics, which is the focus of this paper. Here, we present the results of a worldwide survey of RMAs conducted in 2016. We compare and contrast the demographics of RMAs across different regions of the world. Findings from previous national surveys, such as those by Roberts & House (2005), and Shambrook et al (2015), are upheld and expanded in an international context—for example, that the profession is predominantly female. In addition, a high level of academic attainment is also reported, in line with findings from D’Agostino et al. (1991). There are some significant differences in responses between regions of the world which reflect the differential maturity of the profession. For example, the U.S. has by far the highest number of respondents with over 20 years’ experience in research administration as compared to the other regions. The reasons for joining and staying in the profession are also explored, with positives including working with faculty, the challenging work, and the fun. The extensive datasets are not fully explored in this paper and others are invited to use them for their own research and analyses. Overall, we conclude that research administration is becoming a global profession and argue that in some regions it is more advanced than in others, as reflected in the composition of the workforce and the availability and uptake of certification

Research Administration as a Profession (RAAAP) - a snapshot of research administrators and their skills from around the world.

Abstract The Research Administration As A Profession (RAAAP) project is funded under the NCURA Research Program for the period February 2016 through January 2018. It is led by Simon Kerridge, University of Kent and Stephanie F. Scott, Columbia University. The project has surveyed research administrators worldwide to a) give a global snapshot of the profession, and b) determine those skills which are most sought after in research administration leaders. The aim being to provide leaders with guidance on how best to support and develop their staff in their careers, and for junior staff to be able to map their own professional development. The online questionnaire survey was open during the late spring and summer of 2016 and closed on 7th September 2016. We asked a number of associations around the work to canvass their members on our behalf, and are grateful to ACU (Commonwealth), ARMA (UK), ARMS (Australasia), BRAMA (Brazilian), CARA (Canadian), EARMA* (European), NCURA (USA), NORDP (USA), RMAN-J (Japanese), SARIMA (Southern African), SRAI (USA), and WARIMA (Western African) for reaching out to their a combined membership of approximately 20,000. It should be noted that EARMA cascaded this to other members of the Leiden Group (including the Austrian, Danish, Finnish, German, Icelandic, and Norwegian associations) of European associations of research managers and administrators. Overall 2,691 responses were received, including 941 from the USA, 243 from Canada, 453 from the UK, 339 from the rest of Europe, 336 from Oceania, and 185 from other countries around the world. Each completed response provided us with 282 data points aimed at answering the two questions. The poster will provide graphics and charts summarising and discussing our main findings. Simon Kerridge, Director of Research Services, University of Kent, UK Stephanie F Scott, Director of Communications and Outreach, Columbian University, NY, US

Nitrogen isotopic signatures in agglutinates from breccia 79035

Agglutinates in the size range 125-175 microns from regolith breccia 79035 are substantially depleted in N compared with bulk 79035. Isotopically, agglutinate N closely resembles that found previously in ilmenite separates. The minimum (delta)N-15 value found during stepwise pyrolysis of agglutinates is significantly heavier than that observed for bulk 79035. The major host phase for trapped N in 79035, and the host phase of the lightest isotopic component(s), remain unidentified

Ionic adsorption on the brucite (0001) surface:a periodic electrostatic embedded cluster method study

Density functional theory (DFT) at the generalised gradient approximation level is employed within the periodic electrostatic embedded cluster method (PEECM) to model the brucite (0001) surface. Three representative studies are then used to demonstrate the reliability of the PEECM for the description of the interactions of various ionic species with the layered Mg(OH)2 structure, and its performance is compared with periodic DFT, an approach known to be challenging for the adsorption of charged species. The adsorption energies of a series of s block cations, including Sr2+ and Cs+ which are known to coexist with brucite in nuclear waste storage ponds, are well described by the embedded cluster model, provided that basis sets of triple-zeta quality are employed for the adsorbates. The substitution energies of Ca2+ and Sr2+ into brucite obtained with the PEECM are very similar to periodic DFT results, and comparison of the approaches indicates that two brucite layers in the quantum mechanical part of the PEECM are sufficient to describe the substitution. Finally, a detailed comparison of the periodic and PEECM DFT approaches to the energetic and geometric properties of differently coordinated Sr[(OH)2(H2O)4] complexes on brucite shows an excellent agreement in adsorption energies, Sr–O distances, and bond critical point electron densities (obtained via the quantum theory of atoms-in-molecules), demonstrating that the PEECM can be a useful alternative to periodic DFT in these situations

Correlates of unmet needs and psychological distress in adolescent and young adults who have a parent diagnosed with cancer.

Objective. Young people who have a parent with cancer experience elevated levels of psychological distress and unmet needs. In this study we examined the associations between demographics, cancer variables, and family functioning; and levels of distress and unmet needs amongst young people who have a parent diagnosed with cancer. Methods. Young people aged 12 -24 with a parent with cancer (n=255) completed the Offspring Cancer Needs Instrument (unmet needs), the Kessler-10 (distress), and the Family Relationship Index (family functioning), along with measures of demographics and cancer variables (such as: age, sex, time since cancer diagnosis). Variables associated with distress and unmet needs (including unmet need domains) were assessed using multiple linear regression. Results. Being female and older, having more unmet cancer needs and poorer family functioning was associated with increased distress. Having a father with cancer, a shorter time since diagnosis, and poor family functioning were associated with increased unmet needs. Family conflict and expressiveness were particularly important components of family functioning. Having a parent relapse with cancer was also associated with unmet needs in the domains of practical assistance, ‘time out’, and support from other young people who have been through something similar. Conclusions. Delineating factors associated with increased distress and unmet needs assists in identifying at risk young people allowing improved assessment and tailoring of support to improve the psychosocial outcomes of young people impacted by parental cancer.beyondblu

‘Mind the Gap’: Extending Outcome Measurement for Accountability and Meaningful Innovation

\ua9 The Author(s) 2024. Published by Oxford University Press on behalf of The British Association of Social Workers.We examine the outcome measurement landscape in care leaver innovation, where many innovations to support transitions of young people leaving care fail to sustain beyond a fixed-term pilot, and fewer impact wider transition policies. Our empirical qualitative study comprises interviews with 31 senior UK children’s social care policy and practice professionals, 103 interviews across five innovation-focused case studies within England with a range of public and private providers. We consider these data in relation to evaluations from a nationally diffused social care innovation. We identified three measurement landscape challenges. First, we highlight the limits of the economically oriented measurement and identify an overlooked outcome measurement demand. Second, we emphasise a need to stratify care leaver population outcomes to better reflect individuals transition through different domains of life and trajectory. Third, we identify areas of precarity around the intended use of care leaver experience. We conclude that tensions exist between the pull towards a unified approach to outcome measurement and the reality of decoupled outcome requirements and legitimacy-seeking priorities which differ according to stakeholder. These tensions entrench stagnant innovation. Recognition of roles and legitimacies that exist across the process of care leaver innovation is warranted. Opportunities for action are discussed

Structure-dependent exchange in the organic magnets Cu(II)Pc and Mn(II)Pc

We study exchange couplings in the organic magnets copper(II) phthalocyanine (Cu(II)Pc) and manganese(II) phthalocyanine (Mn(II)Pc) by a combination of Green's function perturbation theory and \textsl{ab initio} density-functional theory (DFT). Based on the indirect exchange model our perturbation-theory calculation of Cu(II)Pc qualitatively agrees with the experimental observations. DFT calculations performed on Cu(II)Pc dimer show a very good quantitative agreement with exchange couplings that we extract by using a global fitting for the magnetization measurements to a spin-1/2 Bonner-Fisher model. These two methods give us remarkably consistent trends for the exchange couplings in Cu(II)Pc when changing the stacking angles. The situation is more complex for Mn(II)Pc owing to the competition between super-exchange and indirect exchange.Comment: 13 pages,10 figures. To appear in Physical Review