Molecular Hydrogen Emission from Protoplanetary Disks

We have modeled self-consistently the density and temperature profiles of gas and dust in protoplanetary disks, taking into account irradiation from a central star. Making use of this physical structure, we have calculated the level populations of molecular hydrogen and the line emission from the disks. As a result, we can reproduce the observed strong line spectra of molecular hydrogen from protoplanetary disks, both in the ultraviolet (UV) and the near-infrared, but only if the central star has a strong UV excess radiation.Comment: 19 pages, accepted for publication in Astronomy and Astrophysic

Recovery approaches with women with a diagnosis of personality disorder in secure care

A literature review in Section A reviews the conceptual and empirical literature with regard to the usefulness and challenges inherent in applying recovery approaches in secure services, with a particular focus on women with a diagnosis of personality disorder. Section B. Background: Some studies have suggested that recovery approaches could be facilitated in secure mental health services despite a number of inherent tensions. However, none have explored if this applies to women with a diagnosis of personality disorder in secure care. A group whose needs have historically been overlooked, and can present with complex care-seeking behaviours. Aims. To explore how staff working with these women understand and apply recovery approaches in secure units. Method. Eleven multidisciplinary staff members working in a medium-secure unit in the UK participated in in-depth interviews. The data was analysed using grounded theory. Results. A preliminary model was generated, which comprised of five categories: secure base, balancing tensions, therapeutic relationship, initiating recovery, and nurturing recovery. These appeared to interact and influence each other throughout the recovery process. Conclusions. Staff are required to continually balance a number of tensions and as such they need a secure base from which to explore the service-users’ unique recovery process through the medium of collaborative therapeutic relationships. Staff sharing a recovery ethos that is embedded in the culture of a conducive environment, and is supported by supervision and teamwork, fosters the actualisation of recovery principles of empowerment, identity formation, and hope. Section C provides a critical appraisal of the study as well as a personal reflection on what was learnt through the process of the conducting the study

Torsion and bending of nucleic acids studied by subnanosecond time-resolved fluorescence depolarization of intercalated dyes

Subnanosecond time‐resolved fluorescence depolarization has been used to monitor the reorientation of ethidium bromide intercalated in native DNA, synthetic polynucleotide complexes, and in supercoiled plasmid DNA. The fluorescence polarization anisotropy was successfully analyzed with an elastic model of DNA dynamics, including both torsion and bending, which yielded an accurate value for the torsional rigidity of the different DNA samples. The dependence of the torsional rigidity on the base sequence, helical structure, and tertiary structure was experimentally observed. The magnitude of the polyelectrolyte contribution to the torsional rigidity of DNA was measured over a wide range of ionic strength, and compared with polyelectrolyte theories for the persistence length. We also observed a rapid initial reorientation of the intercalated ethidium which had a much smaller amplitude in RNA than in DNA

Time-resolved spectroscopy of macromolecules: Effect of helical structure on the torsional dynamics of DNA and RNA

The torsional rigidity of DNA and RNA is measured via the fluorescence depolarization technique

A Monograph of the Tunicate Ciona intestinalis (Linnaeus)

Abstract Not Provided

Treatment of common issues in General Electric's and IUE's local 201 employee publications

Thesis (M.S.)--Boston Universit

Study of volatile contaminants in reclaimed water

Different methods were evaluated for reducing the volatile contaminants found in water recovered from urine by distillation. The use of activated carbon, addition of potassium permanganate, and the use of oxidation catalyst are described along with laboratory tests. It is concluded that catalytic decomposition appears to be feasible, and further investigation is recommended