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1.5-1.6 eV bandgap Pb-based perovskite solar cells (PSCs) with 30-31% theoretical efficiency limit by the Shockley-Queisser model achieve 21-24% power conversion efficiencies (PCEs). However, the best PCEs of reported ideal-bandgap (1.3-1.4 eV) Sn-Pb PSCs with a higher 33% theoretical efficiency limit are 0.4 V). Herein, it is found that the addition of guanidinium bromide (GABr) can significantly improve the structural and photoelectric characteristics of ideal-bandgap (≈1.34 eV) Sn-Pb perovskite films. GABr introduced in the perovskite films can efficiently reduce the high defect density caused by Sn2+ oxidation in the perovskite, which is favorable for facilitating hole transport, decreasing charge-carrier recombination, and reducing the Voc deficit. Therefore, the best PCE of 20.63% with a certificated efficiency of 19.8% is achieved in 1.35 eV PSCs, along with a record small Voc deficit of 0.33 V, which is the highest PCE among all values reported to date for ideal-bandgap Sn-Pb PSCs. Moreover, the GABr-modified PSCs exhibit significantly improved environmental and thermal stability. This work represents a noteworthy step toward the fabrication of efficient and stable ideal-bandgap PSCs. © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.Bioactive peptides pose a great threat to sports integrity. Detection of these peptides is essential for enforcing prohibition of them in sports. Identifying catabolites of these peptides that are formed ex vivo in plasma may improve their detection. In the present study, the stability of 27 bioactive peptides with protection at both termini in equine plasma was examined under different incubation conditions, using HILIC coupled to HRMS. Of the 27 peptides, 13 were stable after incubation at 37 °C for 72 hr, but the remaining 14 were less stable. Ex vivo catabolites of these 14 peptides were detected using their theoretical masses generated in silico, their appearance was monitored over the time course of incubation, and their identity was verified by their product ion spectra. Catabolites identified for chemotactic peptide, DALDA, dmtDALDA, deltorphins I and II, Hyp6 -dermorphin, Lys7 -dermorphin and dermorphin analog are novel. A D-amino acid residue at position 2 or 1 of a peptide or next to its C-terminus protected the relevant terminal from degradation by exopeptidases, but such a residue at position 3 did not. A pGlu residue or N-methylation at the N-terminus of a peptide did not protect its N-terminal. Ethylamide at the C-terminus of a peptide provided the C-terminal protection from attacks by carboxypeptidases. The C-terminal Lys amide in DALDA, dmtDALDA, and Lys7 -dermorphin was susceptible to cleavage by plasma enzymes, which is the first report, to the authors' knowledge. The results from the present study provide insights into the stability of peptides in plasma. This article is protected by copyright. All rights reserved.The interpersonal-psychological theory of suicide posits that elevated pain tolerance is necessary to engage in suicidal behaviour. It is assumed that suicidal intent only leads to lethal (or near lethal) suicide attempts when an individual has the capability to persist the pain involved in dying. The aim of this study was to assess whether objective pain persistence moderates the association between suicide intent and lethality of a recent suicide attempt. Ninety-seven inpatients, who were hospitalized due to a recent suicide attempt, were interviewed regarding lifetime suicide attempts as well as their most recent suicide attempt Method of attempt, intention to die, medical risk of death, probability of an intervention, and physical condition following the attempt were inquired. Pain persistence was examined using a pressure algometer. Contrary to the expectation, pain persistence did not moderate the association between suicide intent and lethality of a recent suicide attempt, that is, medical risk of death, probability of an intervention, or physical condition following the attempt. Future studies are needed to examine method specific pain persistence for suicidal behaviour in a longitudinal study design. © 2020 John Wiley & Sons, Ltd.OBJECTIVES The primary objective was to determine medication-taking behaviours and factors influencing adherence in patients with mental illness and recent homelessness. Secondary objectives were to explore patients' perceptions on mobile technology use to support adherence. METHODS A constructivist approach and qualitative description method was used. The sample population consisted of patients with recent homelessness and mental illness affiliated with a community-based outreach programme in Canada. Participants were purposefully selected; semi-structured interviews were conducted to elicit information on medication-taking strategies and mobile technology to support adherence. A standardized questionnaire collected demographic and medical information; the Medication Adherence Rating Scale (MARS) was used to evaluate self-reported adherence. Questionnaire data were analysed using summary descriptive statistics. Interview data were subject to qualitative content analysis. KEY FINDINGS Fifteen participants with a mean age of 44 years were included. The mean MARS score ± standard deviation was 7.3 ± 1.5. Themes arising from the data included patient factors (i.e. insight, attitudes towards medications, coping strategies) and external factors (i.e. therapeutic alliance, family support that impacted adherence) and technology use and health. Eight participants (53%) had access to a mobile phone. https://www.selleckchem.com/products/mk-4827.html There was a moderate interest in the use of mobile technology to support adherence, with cost and technology literacy identified as barriers. CONCLUSION External supports and individual medication management strategies were important in supporting medication adherence in this patient group. Perceived need for mobile technology, in addition to existing supports for adherence, was not high. Challenges accessing and maintaining consistent mobile technology and individual preferences should be considered when developing mobile technology-based interventions. © 2020 Royal Pharmaceutical Society.
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