239 research outputs found

    Ion-ion proton transfer reactions of bio-ions involving noncovalent interactions: Holomyoglobin

    Get PDF
    Multiply protonated horse skeletal muscle holomyoglobin and apomyoglobin have been subjected to ion-ion proton transfer reactions with anions derived from perfluoro-1,3dimethylcyclohexane in a quadrupole ion trap operated with helium as a bath gas at 1 mtorr. Neither the apomyoglobin nor holomyoglobin ions show any sign of fragmentation associated with charge state reduction to the 1 + charge state. This is particularly noteworthy for the holomyoglobin ions, which retain the noncovalently bound heme group. For example, no sign of heme loss is associated with charge state reduction from the 9 + charge state of holomyoglobin to the 1 + charge state despite the eight consecutive highly exothermic proton transfer reactions required to bring about this charge change. This result is consistent with calculations that show the combination of long ion lifetime and the high ion-helium collision rate relative to the ion-ion collision rate makes fragmentation unlikely for high mass ions in the ion trap environment even for noncovalently bound complexes of moderate binding strength. The ion-ion proton transfer rates for holo- and apomyoglobin ions of the same charge state also were observed to be indistinguishable, which supports the expectation that ion-ion proton transfer rates are insensitive to ion structure and are determined primarily by the attractive Coulomb field

    State‐Level Transgender‐Specific Policies, Race/Ethnicity, and Use of Medical Gender Affirmation Services among Transgender and Other Gender‐Diverse People in the United States

    Full text link
    Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/162794/2/milq12467.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/162794/1/milq12467_am.pd

    Biology and stock status of inshore demersal scalefish indicator species in the Gascoyne Coast Bioregion

    Get PDF
    (114°50\u27E), includes the iconic Shark Bay and Ningaloo World Heritage areas plus the regional centre of Carnarvon and coastal towns of Denham, Coral Bay and Exmouth. The Gascoyne Bioregion is a transition zone between tropical and temperate waters and supports a diverse range of commercial invertebrate and scalefish fisheries and provides a large variety of recreational fishing opportunities. This report investigates the stock status of the inshore demersal scalefish “suite” of species for the Gascoyne region. These bottom dwelling fish are primarily taken by line fishing in waters of 20-250 m depth by both the commercial and recreational sectors

    How much do delayed health care seeking, delayed care provision and diversion from primary care contribute to the transmission of STIs

    Get PDF
    Objectives: To explore the changing pattern of condom use from 1990 to 2000; to identify sociodemographic and behavioural factors associated with condom use; and reasons for condom use in 2000. Methods: Large probability sample surveys administered among those resident in Britain aged 16–44 (n = 13 765 in 1990, n = 11 161 in 2000). Face to face interviews with self completion components collected sociodemographic, behavioural, and attitudinal data. Results: Condom use in the past year among sexually active 16–24 year old men increased from 61.0% in 1990 to 82.1% in 2000 (p<0.0001), and from 42.0% to 63.2% (p<0.0001) among women of the same age, with smaller increases among older age groups. Among individuals reporting at least two partners in the previous 4 week period, approximately two thirds reported inconsistent or no condom use (63.1% (95% CI 55.9% to 69.8%) of the men and 68.5% (95% CI 57.6% to 77.7%) of the women). Conclusions: Rates of condom use increased substantially between 1990 and 2000, particularly among young people. However, inconsistent condom use by individuals with high rates of partner acquisition may contribute significantly to the recent resurgence in STIs. This group is an important target for intensive and specific sexual health interventions

    Phase II assessment of talabostat and cisplatin in second-line stage IV melanoma

    Get PDF
    <p>Abstract</p> <p>Background</p> <p>Metastatic melanoma is an incurable disease with an average survival of less than one year. Talabostat is a novel dipeptidyl peptidase inhibitor with immunostimulatory properties.</p> <p>Methods</p> <p>This phase II, open label, single arm study was conducted to evaluate the safety and efficacy of 75–100 mg/m<sup>2 </sup>cisplatin combined with 300–400 mcg talabostat bid for 6, 21-day cycles. The primary endpoint was overall response. The rate of complete responses, duration of overall objective response, progression-free survival (PFS), and overall survival were the secondary endpoints.</p> <p>Results</p> <p>Six objective partial responses were recorded in the 74 patients (8.1%) in the intention-to-treat population. Five of these responses involved the 40 evaluable patients (12.5%). Thirty-one percent of patients reported SAEs to the combination of talabostat and cisplatin.</p> <p>Conclusion</p> <p>Acceptable tolerability was observed in the intention-to-treat population and antitumor activity was observed in 12.5% of evaluable patients, which is not greater than historical expectation with cisplatin alone.</p

    1990: Abilene Christian College Bible Lectures - Full Text

    Get PDF
    LUKE: A GOSPEL FOR THE WORLD Being the Abilene Christian University Annual Bible Lectures 1990 Published by ACU PRESS 1634 Campus Court Abilene, Texas 7960

    Addressing marine and coastal governance conflicts at the interface of multiple sectors and jurisdictions

    Get PDF
    Marine and coastal activities are closely interrelated, and conflicts among different sectors can undermine management and conservation objectives. Governance systems for fisheries, power generation, irrigation, aquaculture, marine biodiversity conservation, and other coastal and maritime activities are typically organized to manage conflicts within sectors, rather than across them. Based on the discussions around eight case studies presented at a workshop held in Brest in June 2019, this paper explores institutional approaches to move beyond managing conflicts within a sector. We primarily focus on cases where the groups and sectors involved are heterogeneous in terms of: the jurisdiction they fall under; their objectives; and the way they value ecosystem services. The paper first presents a synthesis of frameworks for understanding and managing cross-sectoral governance conflicts, drawing from social and natural sciences. We highlight commonalities but also conceptual differences across disciplines to address these issues. We then propose a novel analytical framework which we used to evaluate the eight case studies. Based on the main lessons learned from case studies, we then discuss the feasibility and key determinants of stakeholder collaboration as well as compensation and incentive schemes. The discussion concludes with future research needs to support policy development and inform integrated institutional regimes that consider the diversity of stakeholder interests and the potential benefits of cross-sectoral coordination
    corecore