354 results on '"Bergqvist L"'
Search Results
102. Influence of dearterialization on distribution of absolute tumor blood flow between hepatic artery and portal vein.
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Wang, Li-Qing, Persson, Bo G., Bergqvist, Lennart, Bengmark, Stig, Wang, L Q, Persson, B G, Bergqvist, L, and Bengmark, S
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- 1994
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103. Clinical Comparison of Bone Scintigraphy with 99Tcm-DPD, 99Tcm-HDP and 99Tcm-MDP
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Brismar J, Cederquist E, Bergqvist L, J Palmer, Darte L, and Naversten Y
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Male ,Quality Control ,medicine.medical_specialty ,Uptake ratio ,Breast Neoplasms ,Technetium Tc 99m Medronate ,030204 cardiovascular system & hematology ,Bone and Bones ,03 medical and health sciences ,0302 clinical medicine ,parasitic diseases ,medicine ,Carcinoma ,Humans ,Radiology, Nuclear Medicine and imaging ,030212 general & internal medicine ,Radionuclide Imaging ,Aged ,Radiochemistry ,Diphosphonates ,Radiological and Ultrasound Technology ,medicine.diagnostic_test ,business.industry ,Prostatic Neoplasms ,Technetium ,Soft tissue ,Organotechnetium Compounds ,Middle Aged ,medicine.disease ,body regions ,Normal bone ,Bone scintigraphy ,Chromatography, Gel ,Female ,Radiology ,business ,Breast carcinoma - Abstract
The bone-imaging agents MDP, DPD and HDP were compared radiochemically (only minor differences were found) in 12 patients with prostatic and 12 patients with breast carcinoma. Each patient received both MDP and either DPD or HDP. The scintigraphic examinations were compared visually and quantitatively. The uptake ratio normal bone/soft tissue was higher for DPD and HDP than for MDP. The ratio pathologic bone/normal bone was highest for MDP, particularly for prostatic carcinoma. The differences in this ratio for breast carcinoma were in general non-significant. The observed differences were minor and of little practical importance.
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- 1984
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104. Clinical Comparison of Bone Scintigraphy with 99Tcm-DPD, 99Tcm-HDP and 99Tcm-MDP
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Bergqvist, L., Brismar, J., Cederquist, E., Darte, L., Naversten, Y., and Palmer, J.
- Abstract
The bone-imaging agents MDP, DPD and HDP were compared radiochemically (only minor differences were found) in 12 patients with prostatic and 12 patients with breast carcinoma. Each patient received both MDP and either DPD or HDP. The scintigraphic examinations were compared visually and quantitatively. The uptake ratio normal bone/soft tissue was higher for DPD and HDP than for MDP. The ratio pathologic bone/normal bone was highest for MDP, particularly for prostatic carcinoma. The differences in this ratio for breast carcinoma were in general non-significant. The observed differences were minor and of little practical importance.
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- 1984
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105. Magnetic and electronic structure of (Ga1-xMnx)As
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Bergqvist, L., Pavel Korzhavyi, Sanyal, B., Mirbt, S., Abrikosov, I. A., Nordström, L., Smirnova, E. A., Mohn, P., Svedlindh, P., and Eriksson, O.
106. Crystal and magnetic structure of Mn3IrSi
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Eriksson, T., Lizárraga, R., Felton, S., Bergqvist, L., Andersson, Y., Nordblad, P., and Olle Eriksson
107. A New Oligocene Cingulate (Mammalia : Xenarthra) from the Taubaté Basin, Brazil
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Édison Oliveira, Ribeiro, A. M., and Bergqvist, L. P.
108. Defect-induced magnetic structure in (Ga1-xMnx)As
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Korzhavyi, P. A., Abrikosov, I. A., Smirnova, E. A., Bergqvist, L., Mohn, P., Mathieu, R., Svedlindh, P., Sadowski, J., Isaev, E. I., Vekilov, Yu Kh, and Olle Eriksson
109. The standard model of the rare-earths, analyzed from the Hubbard-Iapproximation
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Locht, Inka L. M., Kvashnin, Yaroslav O., Rodrigues, Debora C. M., Di Marco, Igor, Pereiro, Manuel, Bergman, Anders, Bergqvist, L., Katsnelson, M. I., Delin, Anna, Eriksson, Olle, Locht, Inka L. M., Kvashnin, Yaroslav O., Rodrigues, Debora C. M., Di Marco, Igor, Pereiro, Manuel, Bergman, Anders, Bergqvist, L., Katsnelson, M. I., Delin, Anna, and Eriksson, Olle
110. Lack of correlation between fecal blood loss and drug-induced gastric mucosal lesions
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Hedenbro, J.L., primary, Wetterberg, P., additional, Vallgren, S., additional, and Bergqvist, L., additional
- Published
- 1988
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111. Dinosaur osteoderms from the Adamantina Formation, upper Cretaceous of São Paulo State, Brazil
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TORRES SANDRA R., AVILLA LEONARDO S., ABRANTES ÉRIKA A.L., and BERGQVIST LÍLIAN P.
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Science - Published
- 2002
112. Childbirth experience questionnaire (CEQ): development and evaluation of a multidimensional instrument
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Bergqvist Liselotte, Taft Charles, Dencker Anna, Lilja Håkan, and Berg Marie
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Gynecology and obstetrics ,RG1-991 - Abstract
Abstract Background Negative experiences of first childbirth increase risks for maternal postpartum depression and may negatively affect mothers' attitudes toward future pregnancies and choice of delivery method. Postpartum questionnaires assessing mothers' childbirth experiences are needed to aid in identifying mothers in need of support and counselling and in isolating areas of labour and birth management and care potentially in need of improvement. The aim of this study was to develop and evaluate a questionnaire for assessing different aspects of first-time mothers' childbirth experiences. Methods Childbirth domains were derived from literature searches, discussions with experienced midwives and interviews with first-time mothers. A draft version of the Childbirth Experience Questionnaire (CEQ) was pilot tested for face validity among 25 primiparous women. The revised questionnaire was mailed one month postpartum to 1177 primiparous women with a normal pregnancy and spontaneous onset of active labor and 920 returned evaluable questionnaires. Exploratory factor analysis using principal components analysis and promax rotation was performed to identify dimensions of the childbirth experience. Multitrait scaling analysis was performed to test scaling assumptions and reliability of scales. Discriminant validity was assessed by comparing scores from subgroups known to differ in childbirth experiences. Results Factor analysis of the 22 item questionnaire yielded four factors accounting for 54% of the variance. The dimensions were labelled Own capacity, Professional support, Perceived safety, and Participation. Multitrait scaling analysis confirmed the fit of the four-dimensional model and scaling success was achieved in all four sub-scales. The questionnaire showed good sensitivity with dimensions discriminating well between groups hypothesized to differ in experience of childbirth. Conclusion The CEQ measures important dimensions of the first childbirth experience and may be used to measure different aspects of maternal satisfaction with labour and birth.
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- 2010
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113. Origin of the magnetostructural coupling in FeMnP0.75Si0.25.
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Delczeg-Czirjak, E. K., Pereiro, M., Bergqvist, L., Kvashnin, Y. O., Di Marco, I., Guijiang Li, Vitos, L., and Eriksson, O.
- Subjects
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COUPLING reactions (Chemistry) , *CRYSTAL structure , *FERROMAGNETIC materials , *DENSITY functional theory , *EXCHANGE interactions (Magnetism) , *ANTIFERROMAGNETIC materials - Abstract
The strong coupling between the crystal structure and magnetic state (ferromagnetic or helical antiferromagnetic) of FeMnP0.75Si0.25 is investigated using density functional theory in combination with atomistic spin dynamics. We find many competing energy minima for drastically different ferromagnetic and noncollinear magnetic configurations. We also find that the appearance of a helical spin-spiral magnetic structure at finite temperature is strongly related to one of the crystal structures reported for this material. Shorter Fe-Fe distances are found to lead to a destabilized ferromagnetic coupling, while out-of-plane Mn-Mn exchange interactions become negative with the shortening of the interatomic distances along the c axis, implying an antiferromagnetic coupling for the nearest-neighbor Mn-Mn interactions. The impact of the local dynamical correlations is also discussed. [ABSTRACT FROM AUTHOR]
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- 2014
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114. Unified approach to electronic, thermodynamical, and transport properties of Fe3Si and Fe3Al alloys.
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Kudrnovský, J., Drchal, V., Bergqvist, L., Rusz, J., Turek, I., Újfalussy, B., and Vincze, I.
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IRON alloys , *CURIE temperature , *ELECTRONIC structure , *MAGNETIZATION , *HEISENBERG model , *THERMAL properties - Abstract
The electronic, thermodynamical, and transport properties of ordered Fe3X (X=Al,Si) alloys are studied from first principles. We present here a unified approach to the phase stability, the estimate of the Curie temperature, the temperature dependence of sublattice magnetizations, magnon spectra, the spin-stiffnesses, and residual resistivities. An important feature of the present study is that all calculated physical properties are determined in the framework of the same first-principles electronic structure model combined with the effective Ising and Heisenberg Hamiltonians used for study of the thermodynamical properties of alloys. Curie temperatures, spin-stiffnesses, and magnon spectra are determined using the same calculated exchange integrals. Finally, the transport properties are calculated using the linear-response theory. Our theoretical estimates compare well with available experimental data. In particular, calculations predict (in agreement with experiment) the ordered D03 phase as the ground-state alloy structure, demonstrate that a correct relation of Curie temperatures of Fe3Al/Fe3Si alloys can be obtained only by going beyond a simple mean-field approximation, provide reasonable estimates of spin-stiffnesses, and give resistivities compatible with structural disorder observed in the experiment. Although the calculated temperature dependences of the Fe magnetization on different sublattices are similar, they nevertheless deviate more than in the experiment, and we discuss a possible origin. [ABSTRACT FROM AUTHOR]
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- 2014
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115. Magnetic exchange interactions in B-, Si-, and As-doped Fe2P from first-principles theory.
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Delczeg-Czirjak, E. K., Gercsi, Z., Bergqvist, L., Eriksson, O., Szunyogh, L., Nordblad, P., Johansson, B., and Vitos, L.
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IRON compounds , *PHOSPHIDES , *DENSITY functionals , *SEMICONDUCTOR doping , *TEMPERATURE effect , *STOICHIOMETRY , *CRYSTALLOGRAPHY , *CHEMICAL structure - Abstract
Di-iron phosphide (Fe2P) is a parent system for a set of magnetocaloric materials. Although the magnetic ordering temperature (Tc = 215 K) of the stoichiometric composition is too low for room-temperature magnetic refrigeration, the partial replacement of P with B, Si, or As elements results in a steep increase in the magnetic ordering temperature. Doping leads to different equilibrium volumes and hexagonal axial ratios (c/a) within the same crystallographic phase over a wide concentration range. Here, using first principles theory, we decompose the change in the total magnetic exchange interaction upon doping into chemical and structural contributions, the latter including the c/a-ratio and volume effects. We demonstrate that for the investigated alloys the structural effect can be ascribed mainly to the decrease in the c/a ratio that strengthens the magnetic exchange interactions between the two Fe sublattices. [ABSTRACT FROM AUTHOR]
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- 2012
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116. Lack of correlation between fecal blood loss and drug-induced gastric mucosal lesions
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Bergqvist, L
- Published
- 1988
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117. [No education without feedback: why and how to give it in the clinical setting].
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Bergqvist L, Berner A, Darbellay-Fahroumand P, and Coen M
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- Humans, Education, Medical methods, Education, Medical organization & administration, Students, Medical psychology, Internal Medicine education, Feedback
- Abstract
The number of medical students and doctors in training is growing, particularly in private practices due to the promotion of the internal medicine and primary care curriculum. Therefore, doctors increasingly find themselves in a teaching role with the responsibility to give feedback to the people in training. This article aims to give the definition of feedback and to review the reasons for its central role in pre- and postgraduate medical education. We describe the opportunities and barriers to giving feedback, how to make it effective and present a selection of frequently used feedback models., Competing Interests: Les auteurs n’ont déclaré aucun conflit d’intérêts en relation avec cet article.
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- 2024
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118. Intervention with the CO-OP Approach leads to a transfer effect over time to untrained goals for children with cerebral palsy or spina bifida.
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Öhrvall AM, Hofgren C, Lindquist B, Bergqvist L, Himmelmann K, Opheim A, Sjöwall D, Brock K, and Peny-Dahlstrand M
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- Humans, Child, Female, Male, Adolescent, Follow-Up Studies, Treatment Outcome, Activities of Daily Living, Transfer, Psychology, Cerebral Palsy rehabilitation, Spinal Dysraphism rehabilitation, Goals, Executive Function, Occupational Therapy methods
- Abstract
Purpose: This study aims to investigate whether the treatment effects, in terms of goal attainment, transfer effects and impact on executive functions, of an intervention in children with cerebral palsy or spina bifida using the Cognitive Orientation to daily Occupational Performance (CO-OP) Approach are maintained over time, from immediately after the intervention to three months afterwards., Method: A three-month follow-up study, from an intervention using CO-OP. Thirty-four children (7-16 years) each identified four goals (one untrained to examine transfer) and participated in an eleven-session intervention. Assessments were performed at baseline, immediately after the intervention and at a three-month follow-up using the Canadian Occupational Performance Measure and the Performance Quality Rating Scale. Executive function and self-rated competence were assessed at the same timepoints., Results: Statistically significant and clinically relevant improvements in goal achievement were demonstrated for both trained and untrained goals after the intervention and were maintained at follow-up. The clinically relevant improvement in untrained goals continued to increase until follow-up. Self-rated competence increased after the intervention and was maintained at follow-up., Conclusion: The CO-OP intervention was effective in achieving and maintaining the children's own goals over time. The transfer effect was confirmed by higher goal attainment for the untrained goals.
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- 2024
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119. The Pseudomonas aeruginosa lectin LecB modulates intracellular reactive oxygen species production in human neutrophils.
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Sanchez Klose FP, Dahlstrand Rudin A, Bergqvist L, Scheffler JM, Jönsson K, Islander U, Karlsson-Bengtsson A, Bylund J, and Venkatakrishnan V
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- Humans, Pseudomonas aeruginosa chemistry, Pseudomonas aeruginosa metabolism, Reactive Oxygen Species metabolism, Lectins, Neutrophils, Extracellular Traps
- Abstract
Pseudomonas aeruginosa is a Gram-negative bacterium and an opportunistic pathogen ubiquitously present throughout nature. LecB, a fucose-, and mannose-binding lectin, is a prominent virulence factor of P. aeruginosa, which can be expressed on the bacterial surface but also be secreted. However, the LecB interaction with human immune cells remains to be characterized. Neutrophils comprise the first line of defense against infections and their production of reactive oxygen species (ROS) and release of extracellular traps (NETs) are critical antimicrobial mechanisms. When profiling the neutrophil glycome we found several glycoconjugates on granule and plasma membranes that could potentially act as LecB receptors. In line with this, we here show that soluble LecB can activate primed neutrophils to produce high levels of intracellular ROS (icROS), an effect that was inhibited by methyl fucoside. On the other hand, soluble LecB inhibits P. aeruginosa-induced icROS production. In support of that, during phagocytosis of wild-type and LecB-deficient P. aeruginosa, bacteria with LecB induced less icROS production as compared with bacteria lacking the lectin. Hence, LecB can either induce or inhibit icROS production in neutrophils depending on the circumstances, demonstrating a novel and potential role for LecB as an immunomodulator of neutrophil functional responses., (© 2023 The Authors. European Journal of Immunology published by Wiley-VCH GmbH.)
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- 2024
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120. The 'process of doing' in everyday occupations - a challenge for young adults with cerebral palsy.
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Bergqvist L, Öhrvall AM, and Peny-Dahlstrand M
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- Humans, Young Adult, Occupations, Cerebral Palsy
- Abstract
Background: There is a lack of knowledge about how persons with cerebral palsy (CP) perceive their 'process of doing' while performing everyday occupations. As described in the Model of the Process of Doing (MPoD), performing an occupation is a complex process consisting of six phases (generate idea, plan, initiate, enact, adjust, end) and time management. Aim: To collect the experiences of young adults with CP, classified at Manual Ability Classification System (MACS) level I or II, regarding how they perceive challenges in their occupational performance in relation to the different phases of the 'process of doing'. Method: Semi-structured interviews were performed with ten participants with CP aged 19-30 years, MACS level I or II. The interview material was related to the MPoD phases using directed content analysis. Results: The participants' descriptions of how they perceived their personal 'process of doing' showed problems in all MPoD phases. All participants experienced difficulties in one or more phases, but none had difficulties in all phases. Difficulties were more frequent in some phases than in others. Conclusion/Significance: To understand the complexity of doing everyday occupations in young adults with CP, there is a need to address all phases of the 'process of doing'.
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- 2024
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121. Larixol is not an inhibitor of Gα i containing G proteins and lacks effect on signaling mediated by human neutrophil expressed formyl peptide receptors.
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Björkman L, Forsman H, Bergqvist L, Dahlgren C, and Sundqvist M
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- Humans, Signal Transduction, GTP-Binding Proteins metabolism, Receptors, Formyl Peptide metabolism, Neutrophils
- Abstract
Neutrophils express several G protein-coupled receptors (GPCRs) connected to intracellular Gα
i or Gαq containing G proteins for down-stream signaling. To dampen GPCR mediated inflammatory processes, several inhibitors targeting the receptors and/or their down-stream signals, have been developed. Potent and selective inhibitors for Gαq containing G proteins are available, but potent and specific inhibitors of Gαi containing G proteins are lacking. Recently, Larixol, a compound extracted from the root of Euphorbia formosana, was shown to abolish human neutrophil functions induced by N-formyl-methionyl-leucyl-phenylalanine (fMLF), an agonist recognized by formyl peptide receptor 1 (FPR1) which couple to Gαi containing G proteins. The inhibitory effect was suggested to be due to interference with/inhibition of signals transmitted by βγ complexes of the Gαi containing G proteins coupled to FPR1. In this study, we applied Larixol, obtained from two different commercial sources, to determine the receptor- and G protein- selectivity of this compound in human neutrophils. However, our data show that Larixol not only lacks inhibitory effect on neutrophil responses mediated through FPR1, but also on responses mediated through FPR2, a Gαi coupled GPCR closely related to FPR1. Furthermore, Larixol did not display any features as a selective inhibitor of neutrophil responses mediated through the Gαq coupled GPCRs for platelet activating factor and ATP. Hence, our results imply that the inhibitory effects described for the root extract of Euphorbia formosana are not mediated by Larixol and that the search for a selective inhibitor of G protein dependent signals generated by Gαi coupled neutrophil GPCRs must continue., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 The Author(s). Published by Elsevier Inc. All rights reserved.)- Published
- 2023
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122. WITHDRAWN: Larixol is not an inhibitor of Gα i containing G proteins and lacks effect on signaling mediated by human neutrophil expressed formyl peptide receptors.
- Author
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Björkman L, Forsman H, Bergqvist L, Dahlgren C, and Sundqvist M
- Abstract
This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at https://www.elsevier.com/about/policies/article-withdrawal, Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023. Published by Elsevier Inc.)
- Published
- 2023
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123. Added value of electrical impedance spectroscopy in adjunction of colposcopy: a prospective cohort study.
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Bergqvist L, Heinonen A, Carcopino X, Redman C, Aro K, Kiviharju M, Virtanen S, Omar PL, Kotaniemi-Talonen L, Louvanto K, Nieminen P, and Kalliala I
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- Pregnancy, Female, Humans, Colposcopy, Dielectric Spectroscopy, Prospective Studies, Vaginal Smears methods, Papillomaviridae, Uterine Cervical Neoplasms diagnosis, Uterine Cervical Neoplasms pathology, Atypical Squamous Cells of the Cervix pathology, Uterine Cervical Dysplasia diagnosis, Squamous Intraepithelial Lesions, Papillomavirus Infections diagnosis
- Abstract
Objective: To assess whether electrical impedance spectroscopy (EIS) as an adjunctive technology enhances the performance of colposcopy., Design: Prospective cohort study., Setting: University Hospital colposcopy clinic., Participants: Colposcopy with EIS for 647 women and conventional colposcopy for 962 women., Interventions: Comparison of the performance of colposcopy by referral cervical cytology in two cohorts, with and without EIS as an adjunctive technology., Outcome Measures: Prevalence of cervical intraepithelial neoplasia grade 2 or worse (CIN2+), diagnostic testing accuracy to detect CIN2+ with and without EIS and their relative differences between cohorts., Results: The prevalence of CIN2+ varied between the cohorts according to referral cytology: 17.0% after abnormal squamous cells of unknown significance referral cytology in EIS cohort and 9.1% in the reference cohort, 16.5% and 18.9% after low-grade squamous intraepithelial lesion (LSIL), 44.3% and 58.2% after atypical squamous cells, cannot exclude high-grade squamous intraepithelial lesion (HSIL) (atypical squamous cells that cannot exclude HSIL), and 81.9% and 77.0% after HSIL cytology, respectively. Sensitivity to detect CIN2+ was higher in the EIS cohort, varying from 1.79 (95% CI 1.30 to 2.45) after LSIL referral cytology to 1.16 (95% CI 1.09 to 1.23) after HSIL referral cytology, with correspondingly lower specificity after any referral cytology., Conclusions: Colposcopy with EIS had overall higher sensitivity but lower specificity to detect CIN2+ than conventional colposcopy. CIN2+ prevalence rates were, however, not consistently higher in the EIS cohort, suggesting innate differences between the cohorts or truly lower detection rates of CIN2+ for EIS, highlighting the need for randomised controlled trials on the effectiveness of EIS., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY. Published by BMJ.)
- Published
- 2023
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124. Novel inhibitory effect of galectin-3 on the respiratory burst induced by Staphylococcus aureus in human neutrophils.
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Venkatakrishnan V, Elmwall J, Lahiri T, Sundqvist M, Bergqvist L, Leffler H, Nilsson UJ, Welin A, Bylund J, and Karlsson-Bengtsson A
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- Humans, Reactive Oxygen Species metabolism, Galectin 3 metabolism, Respiratory Burst, Phagocytosis, Neutrophils metabolism, Staphylococcus aureus
- Abstract
Among the responders to microbial invasion, neutrophils represent the earliest and perhaps the most important immune cells that contribute to host defense with the primary role to kill invading microbes using a plethora of stored anti-microbial molecules. One such process is the production of reactive oxygen species (ROS) by the neutrophil enzyme complex NADPH-oxidase, which can be assembled and active either extracellularly or intracellularly in phagosomes (during phagocytosis) and/or granules (in the absence of phagocytosis). One soluble factor modulating the interplay between immune cells and microbes is galectin-3 (gal-3), a carbohydrate-binding protein that regulates a wide variety of neutrophil functions. Gal-3 has been shown to potentiate neutrophil interaction with bacteria, including Staphylococcus aureus, and is also a potent activator of the neutrophil respiratory burst, inducing large amounts of granule-localized ROS in primed cells. Herein, the role of gal-3 in regulating S. aureus phagocytosis and S. aureus-induced intracellular ROS was analyzed by imaging flow cytometry and luminol-based chemiluminescence, respectively. Although gal-3 did not interfere with S. aureus phagocytosis per se, it potently inhibited phagocytosis-induced intracellular ROS production. Using the gal-3 inhibitor GB0139 (TD139) and carbohydrate recognition domain of gal-3 (gal-3C), we found that the gal-3-induced inhibitory effect on ROS production was dependent on the carbohydrate recognition domain of the lectin. In summary, this is the first report of an inhibitory role of gal-3 in regulating phagocytosis-induced ROS production., (© The Author(s) 2023. Published by Oxford University Press.)
- Published
- 2023
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125. The Cognitive Orientation to daily Occupational Performance (CO-OP) Approach is superior to ordinary treatment for achievement of goals and transfer effects in children with cerebral palsy and spina bifida - a randomized controlled trial.
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Peny-Dahlstrand M, Hofgren C, Lindquist B, Bergqvist L, Himmelmann K, Opheim A, Sjöwall D, Brock K, and Öhrvall AM
- Subjects
- Humans, Child, Goals, Canada, Orientation, Cerebral Palsy rehabilitation, Occupational Therapy, Spinal Dysraphism
- Abstract
Purpose: Children with cerebral palsy (CP) or spina bifida (SB) often have executive dysfunction affecting activity performance. With the Cognitive Orientation to daily Occupational Performance (CO-OP) Approach, children find their own way to perform activities, using problem-solving strategies and meta-cognitive thinking. The present study aimed to investigate the effectiveness of the CO-OP Approach in children with CP or SB, compared with conventional rehabilitation, in achieving self-identified activity goals, and to explore any generalization and transfer effects., Method: Randomized controlled trial, CO-OP versus treatment as usual, 38 children (7-16 years) participated. Each child identified four goals (to study generalization and transfer, one remained untrained). Primary outcomes: Canadian Occupational Performance Measure (COPM) and Performance Quality Rating Scale (PQRS). Secondary outcomes assessed executive functions and self-rated everyday-life competence., Results: Self-rated goal attainment (COPM) was significantly greater for both trained and untrained goals in the CO-OP group compared with the control group. The rating of observed performance (PQRS) was significantly higher for trained goals in the CO-OP group. The CO-OP group experienced fewer problems in everyday life after treatment. Executive functions did not differ significantly between groups., Conclusion: CO-OP is more effective than ordinary treatment in achieving both trained and untrained goals.IMPLICATIONS FOR REHABILITATIONCO-OP enables children with CP (MACS levels I-III) or SB without intellectual disabilities to reach self-identified goals.CO-OP shows transfer effects to new activities and situations, which may enhance children's self-efficacy.CO-OP is an important complement to conventional rehabilitation services for children with CP and SB.
- Published
- 2023
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126. Time-out in prolonged labour: development of a care model to prevent secondary fear of childbirth.
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Ringqvist AK, Bergqvist L, Brezicka T, and Lundgren I
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- Delivery, Obstetric, Fear, Female, Humans, Parturition, Pregnancy, Time Factors, Labor, Obstetric
- Abstract
Background: During qualitative improvement work, the statistics at the hospital reveal prolonged labour as one of the major causes of secondary fear of childbirth (FOC). The aim of this improvement work was to develop and implement a care process for prolonged labour to prevent secondary FOC., Materials and Methods: To explore the factors behind secondary FOC among multiparous women, a follow-up of referral reasons for 600 women with severe FOC was made between 2015 and 2017 at a Swedish University Hospital. In the group with the most common factor, namely prolonged labour, 41 women were interviewed. From their answers, further research and existing professional knowledge, a care process to prevent secondary FOC was designed, 'Time-out in prolonged labour' (the Time-out). To improve the quality of the care process, the functional resonance analysis method was used. The findings from the interviews were categorised into three themes: lack of involvement; lack of communication and information; and lack of care plan. The women explained that if these areas had been fulfilled, it may have reduced their FOC., Result: To prevent the above-mentioned themes, 'Time-out in prolonged labour' was developed with supporting factors such as gathering the interprofessional team, collecting information, dialogue within the team and the involvement of the women when deciding the care plan. Result after implementation shows a reduction of referral reason due to prolonged labour for women with severe FOC from 28% in 2016 to 8.5% in 2020., Conclusions: The Time-out is a good model to prevent secondary FOC. Central aspects of the model are to ensure women's involvement, good communication and a documented care plan for women in prolonged labour. The supporting factor of interprofessional teamwork is of importance when using the Time-out in practice., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
- Published
- 2022
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127. Implementation of a midwifery model of woman-centered care in practice: Impact on oxytocin use and childbirth experiences.
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Lundgren I, Dencker A, Berg M, Nilsson C, Bergqvist L, and Ólafsdóttir ÓÁ
- Abstract
Introduction: Theoretical models for midwifery have been developed in different countries, but few have been evaluated. This study evaluated the implementation of a midwifery model of woman-centered care (MiMo) in practice., Methods: A mixed method study based on an implementation of MiMo was carried out in a labor ward at a university hospital in Sweden, with another labor ward as a reference. The qualitative core component was a secondary analysis of focus groups with midwives after the implementation. The supplemental quantitative components were oxytocin use for augmentation of labor and women's childbirth experiences before and after the implementation., Results: The midwives viewed MiMo as a useful tool for comprehending the birthing woman holistically, and for identifying what might disturb the birth process. Hindering factors were a lack of organizational stability and time, and midwives' unwillingness to understand the model. Oxytocin use decreased significantly only in the implementation ward (p=0.002) and a significant difference was found between wards in the post-implementation period (p=0.004). However, logistic regression analyses showed that the interaction between ward and time period, controlling for age, epidural use, and birth outcome, was not significant (p=0.304), indicating that the decrease was not significantly related to the implementation. Childbirth experience did not differ before and after the implementation., Conclusions: By using MiMo in practice, midwives have a tool for comprehending the woman holistically and identifying disturbing factors during the birth. However, more research is needed for further implementation that should focus on the potential as well as hindering factors., Competing Interests: The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none was reported., (© 2022 Lundgren I. et al.)
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- 2022
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128. Systematic Monitoring of Cognition for Adults With Cerebral Palsy-The Rationale Behind the Development of the CP Cog -Adult Follow-Up Protocol.
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Stadskleiv K, van Walsem MR, Andersen GL, Bergqvist L, Bøttcher L, Christensen K, Heyerdahl D, Hollung SJ, Høye H, Jahnsen R, Klevberg GL, Lindquist B, Passmark H, Rike PO, Rodby-Bousquet E, and Alriksson-Schmidt AI
- Abstract
Cerebral palsy (CP) comprises a heterogeneous group of conditions recognized by disturbances of movement and posture and is caused by a non-progressive injury to the developing brain. Birth prevalence of CP is about 2-2.5 per 1,000 live births. Although the motor impairment is the hallmark of the diagnosis, individuals with CP often have other impairments, including cognitive ones. Cognitive impairments may affect communication, education, vocational opportunities, participation, and mental health. For many years, CP has been considered a "childhood disability," but the challenges continue through the life course, and health issues may worsen and new challenges may arise with age. This is particularly true for cognitive impairments, which may become more pronounced as the demands of life increase. For individuals with CP, there is no one-to-one correlation between cognition and functioning in other areas, and therefore, cognition must be individually assessed to determine what targeted interventions might be beneficial. To facilitate this for children with CP, a systematic follow-up protocol of cognition, the CP Cog , has been implemented in Norway and Sweden. However, no such protocol currently exists for adults with CP. Such discontinuity in healthcare services that results from lack of follow-up of cognitive functioning and subsequent needs for adjustments and interventions makes transition from pediatric to adult healthcare services challenging. As a result, a protocol for the surveillance of cognition in adults with CP, the CP Cog -Adult, has been developed. It includes assessment of verbal skills, non-verbal reasoning, visual-spatial perception, and executive functioning. It is recommended to perform these assessments at least once in young adulthood and once in the mid-fifties. This report describes the process of developing the CP Cog- Adult, which has a three-fold purpose: (1) to provide equal access to healthcare services to enable the detection of cognitive impairments; (2) to provide interventions that increase educational and vocational participation, enhance quality of life, and prevent secondary impairments; and (3) to collect systematic data for research purposes. The consent-based registration of data in the well-established Swedish and Norwegian national CP registries will secure longitudinal data from childhood into adulthood., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2021 Stadskleiv, van Walsem, Andersen, Bergqvist, Bøttcher, Christensen, Heyerdahl, Hollung, Høye, Jahnsen, Klevberg, Lindquist, Passmark, Rike, Rodby-Bousquet and Alriksson-Schmidt.)
- Published
- 2021
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129. Nurse's experiences of the caring encounter as single responder in prehospital emergency care.
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Vicente V, Bergqvist L, Kvist M, Rubenson Wahlin R, and Sjölin H
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- Ambulances, Humans, Qualitative Research, Sweden, Emergency Medical Services, Nurses
- Abstract
Background: In the Swedish emergency medical services, single responder and assessment units have been implemented to meet the increasing need for ambulance assessment and care., Aim: To describe registered nurseś experiences of care encounters as single responders in the emergency medical services., Method: The study design was descriptive with a qualitative approach. Semi-structured interviews with eight single responders were used together with inductive content analysis., Results: From the theme which showed the experiences of being a single responder in the caring encounter in the ambulance care "meeting unique human care needs with conscious caution", three categories emerged: Increased risk-awareness, Lack of resource support creates vulnerability and Professional experiences and personal qualities contribute to patient safety., Conclusion: The single responders was aware of their vulnerability and a consistent theme was "caution". Risk assessments had evolved and were constantly present to maintain their own and the patient's safety. In critical patients, the experience of frustration and insufficiency dominated but at the same time there was a sense of meaningfulness. The main experience among all single responders was the feeling of getting close to the patient and responding to them in their own way., (Copyright © 2021 Elsevier Ltd. All rights reserved.)
- Published
- 2021
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130. Distribution of HPV Genotypes Differs Depending on Behavioural Factors among Young Women.
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Bergqvist L, Kalliala I, Aro K, Auvinen E, Jakobsson M, Kiviharju M, Virtanen S, Dillner J, Nieminen P, and Louvanto K
- Abstract
Risk factors for the different human papillomavirus (HPV) genotypes are not well understood, although the risk of cancer is known to vary among them. Our aim was to evaluate the association of diverse behavioral and reproductive factors with genotype-specific HPV prevalence among 879 unvaccinated women aged 18-75 years referred to the colposcopy clinic at Helsinki University Hospital in Finland. Cervical swabs for HPV genotyping were collected in the first visit and assessed for 34 high-risk (hr) and low-risk (lr) HPV genotypes. Participants completed a questionnaire on behavioral, reproductive, and lifestyle factors. Differences in genotype-specific HPV prevalence were analyzed overall and in age groups using binary logistic regression. Smoking was associated with higher prevalence in HPV16 compared with other hrHPV genotypes together with decreasing age, being highest among younger women <30 years old, odds ratio (OR) 3.74 (95% CI 1.42-9.88). The later the sexual debut, the more it seemed to protect from HPV16 infection. The best protection was achieved when the sexual debut took place at >20 years of age, with an OR of 0.43 (95% CI 0.23-0.83). This association was not seen with other hrHPV genotypes. Methods of contraception seemed not to have an effect on hrHPV positivity, regardless of the HPV genotype. The genotype specific hrHPV prevalence differs, depending on behavioral factors, especially among younger women referred to colposcopy.
- Published
- 2021
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131. Decision-Support Tools Used in the Baltic Sea Area: Performance and End-User Preferences.
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Nygård H, van Beest FM, Bergqvist L, Carstensen J, Gustafsson BG, Hasler B, Schumacher J, Schernewski G, Sokolov A, Zandersen M, and Fleming V
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- Biodiversity, Environmental Pollution, Humans, Uncertainty, Ecosystem, Eutrophication
- Abstract
Decision-support tools (DSTs) synthesize complex information to assist environmental managers in the decision-making process. Here, we review DSTs applied in the Baltic Sea area, to investigate how well the ecosystem approach is reflected in them, how different environmental problems are covered, and how well the tools meet the needs of the end users. The DSTs were evaluated based on (i) a set of performance criteria, (ii) information on end user preferences, (iii) how end users had been involved in tool development, and (iv) what experiences developers/hosts had on the use of the tools. We found that DSTs frequently addressed management needs related to eutrophication, biodiversity loss, or contaminant pollution. The majority of the DSTs addressed human activities, their pressures, or environmental status changes, but they seldom provided solutions for a complete ecosystem approach. In general, the DSTs were scientifically documented and transparent, but confidence in the outputs was poorly communicated. End user preferences were, apart from the shortcomings in communicating uncertainty, well accounted for in the DSTs. Although end users were commonly consulted during the DST development phase, they were not usually part of the development team. Answers from developers/hosts indicate that DSTs are not applied to their full potential. Deeper involvement of end users in the development phase could potentially increase the value and impact of DSTs. As a way forward, we propose streamlining the outputs of specific DSTs, so that they can be combined to a holistic insight of the consequences of management actions and serve the ecosystem approach in a better manner.
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- 2020
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132. "With CO-OP I'm the boss" - experiences of the cognitive orientation to daily occupational performance approach as reported by young adults with cerebral palsy or spina bifida.
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Öhrvall AM, Bergqvist L, Hofgren C, and Peny-Dahlstrand M
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- Humans, Orientation, Self Efficacy, Young Adult, Cerebral Palsy, Spinal Dysraphism
- Abstract
Purpose: Restrictions to activity and participation in persons with cerebral palsy or spina bifida are often due to both motor and executive dysfunction. Hence methods focusing solely on motor issues are not enough to enhance participation. The Cognitive Orientation to daily Occupational Performance Approach
TM is a performance-based approach offering clients opportunities to create their own strategies to learn skills. The aim of the present study was to explore and describe experiences of the Cognitive Orientation to daily Occupational Performance Approach as reported by young adults with cerebral palsy or spina bifida. Methods: Qualitative content analysis was used. Semi-structured individual interviews were conducted with the 10 participants aged 16-28, post-intervention and at 6-months follow-up. Results: The participants described how the Cognitive Orientation to daily Occupational Performance Approach enhanced their self-efficacy. Four categories describing the participants' experiences emerged: "CO-OP is a different way of learning", "CO-OP sometimes puts a strain on me", "CO-OP supports my way of thinking and doing" and "CO-OP boosts me". Conclusion: The young adults expressed that the Cognitive Orientation to daily Occupational Performance intervention, although sometimes challenging, was worth the effort because it provided them with an opportunity to master everyday-life problems by using meta-cognitive thinking, which enhanced their self-efficacy.Implications for rehabilitationThe Cognitive Orientation to daily Occupational Performance Approach™ - was perceived to provide opportunities to master everyday-life problems by using meta-cognitive thinking.The Cognitive Orientation to daily Occupational Performance Approach boosted the persons feeling of self-efficacy.The Cognitive Orientation to daily Occupational Performance Approach is person-centred and supports the person's own way of learning.- Published
- 2020
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133. Evidence of Construct Validity for the Modified Mental Fatigue Scale When Used in Persons with Cerebral Palsy.
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Bergqvist L, Öhrvall AM, Rönnbäck L, Johansson B, Himmelmann K, and Peny-Dahlstrand M
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- Adult, Female, Humans, Male, Middle Aged, Reproducibility of Results, Cerebral Palsy psychology, Mental Fatigue diagnosis, Neuropsychological Tests standards
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Introduction : Fatigue impacts negatively on everyday activities in individuals with cerebral palsy (CP). More knowledge is needed about how mental fatigue is manifested in this target group. The purpose of this study was to gather evidence about the validity of the modified Mental Fatigue Scale (m-MFS) in adults with CP. Methods : Mixed sequential exploratory design. The respondents were ten persons aged 22-56 with CP (MACS I-II). Results : The respondents perceived the m-MFS as easy to read and understand. Its structure was characterised as straightforward and the text of the rating options was deemed to assist identification with life situations. Very good agreement was seen between the respondents' and the instrument designers' intended meaning for the items in the m-MFS; the weighted kappa was 0.92. Conclusion : This study showed evidence of construct validity, based on response processes and content, for use of the modified MFS in adults with CP.
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- 2020
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134. Measuring women's experiences of decision-making and aspects of midwifery support: a confirmatory factor analysis of the revised Childbirth Experience Questionnaire.
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Dencker A, Bergqvist L, Berg M, Greenbrook JTV, Nilsson C, and Lundgren I
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- Adult, Delivery, Obstetric psychology, Factor Analysis, Statistical, Female, Humans, Labor, Obstetric psychology, Pregnancy, Psychometrics, Reproducibility of Results, Surveys and Questionnaires, Sweden, Translations, Decision Making, Midwifery, Parturition psychology, Patient Satisfaction
- Abstract
Background: Women's experiences of labour and birth can have both short- and long-term effects on their physical and psychological health. The original Swedish version of the Childbirth Experience Questionnaire (CEQ) has shown to have good psychometric quality and ability to differentiate between groups known to differ in childbirth experience. Two subscales were revised in order to include new items with more relevant content about decision-making and aspects of midwifery support. The aim of the study was to develop new items in two subscales and to test construct validity and reliability of the revised version of CEQ, called CEQ2., Method: A total of 11 new items (Professional Support and Participation) and 14 original items from the first CEQ (Own capacity and Perceived safety), were answered by 682 women with spontaneous onset of labour. Confirmatory factor analysis was used to analyse model fit., Results: The hypothesised four-factor model showed good fit (CMIN = 2.79; RMR = 0.33; GFI = 0.94; CFI = 0.94; TLI = 0.93; RMSEA = 0.054 and PCLOSE = 0.12) Cronbach's alpha was good for all subscales (0.82, 0.83, 0.76 and 0.73) and for the total scale (0.91)., Conclusions: CEQ2, like the first CEQ, yields four important aspects of experience during labour and birth showing good psychometric performance, including decision-making and aspects of midwifery support, in both primiparous and multiparous women.
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- 2020
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135. Potential benefits of the cognitive orientation to daily occupational performance approach in young adults with spina bifida or cerebral palsy: a feasibility study.
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Peny-Dahlstrand M, Bergqvist L, Hofgren C, Himmelmann K, and Öhrvall AM
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- Adolescent, Adult, Feasibility Studies, Humans, Sweden, Young Adult, Activities of Daily Living, Cerebral Palsy rehabilitation, Cognition, Orientation, Spinal Dysraphism rehabilitation
- Abstract
Purpose: People with cerebral palsy (CP) or spina bifida (SB) often struggle to perform everyday-life activities. Both groups frequently also have difficulties in creating and using strategies effectively when performing tasks. The cognitive orientation to daily occupational performance (CO-OP) Approach combines the learning of cognitive strategies with task-specific approaches through a client-centred procedure. The aim of this study was to investigate whether the CO-OP Approach is feasible for and potentially beneficial to adolescents and young adults with CP or SB in Sweden by analysing four areas of feasibility (acceptability, efficacy, adaptation, and expansion). Methods: Exploratory multiple-case study using mixed methods. Ten persons aged 16-28, five with each condition, participated in an intervention period. Assessments were performed on three occasions: baseline, post-intervention, and six-month follow-up. Results: The result demonstrates that the CO-OP Approach has the potential to enable adolescents and young adults with either condition to achieve personal goals and to enhance their planning skills and their ability to use strategies when performing activities. This approach is also compatible with the core values of habilitation in Sweden and was found by the participants to be highly meaningful and useful. Conclusions: The CO-OP Approach is feasible for adolescents and young adults with SB or CP in Sweden.Implications for rehabilitationThe Cognitive Orientation to daily Occupational Performance• is a feasible approach for adolescents and young adults with spina bifida and with cerebral palsy.• is a promising approach when it comes to enabling the achievement of personal goals.• might have potential to enhance executive functioning through strategy use.• is in line with the fundamental core values of disability rights of inclusion, empowerment, and participation.
- Published
- 2020
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136. When I do, I become someone: experiences of occupational performance in young adults with cerebral palsy.
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Bergqvist L, Öhrvall AM, Himmelmann K, and Peny-Dahlstrand M
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- Adolescent, Female, Humans, Male, Mental Fatigue etiology, Mental Fatigue psychology, Qualitative Research, Self Concept, Young Adult, Activities of Daily Living, Cerebral Palsy psychology, Cerebral Palsy rehabilitation, Disabled Persons psychology, Disabled Persons rehabilitation, Physical Functional Performance, Self Efficacy
- Abstract
Purpose: Persons with cerebral palsy, even if they have relatively good motor functions, have a lower level of independence and participation in everyday activities than persons of the same age without disabilities. However, there are few descriptions of how persons with cerebral palsy themselves perceive their performance of activities in everyday life. The aim of this study was to describe the perceptions that young adults with cerebral palsy have of occupational performance in everyday life., Methods: This qualitative interview study includes 10 participants with cerebral palsy classified with Manual Ability Classification System level I-II, aged 19-30 years. The data were analyzed using a phenomenographic approach., Results: The interviews resulted in five categories: "Important to do"; "Demanding but can be facilitated"; "Excludes or includes"; "Diminishes me or makes me grow"; and "Comes at a price"., Conclusions: The young adults with cerebral palsy consider that, despite life being so demanding, it is extremely important to perform activities themselves and to feel included, as this enables personal growth. Hence, it is necessary to advance intervention methods based on personally important activities to enable individuals with cerebral palsy to find their own way to perform activities. Further research is needed to increase opportunities for individuals with cerebral palsy to perform everyday activities without too much fatigue and struggle. Implications for Rehabilitation For young adults with cerebral palsy it is extremely important to perform everyday activities independently; by DOING activities they form their identity. Intervention models aimed to enable persons with cerebral palsy to be involved and find their own way to perform everyday activities should be emphasized. Attention must be paid to how mental fatigue is manifested in persons with cerebral palsy. To build self-awareness and self-efficacy, individuals with cerebral palsy need information, early in life, about cerebral palsy and the multifaceted difficulties the disability might lead to.
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- 2019
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137. Lifetime of racetrack skyrmions.
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Bessarab PF, Müller GP, Lobanov IS, Rybakov FN, Kiselev NS, Jónsson H, Uzdin VM, Blügel S, Bergqvist L, and Delin A
- Abstract
The skyrmion racetrack is a promising concept for future information technology. There, binary bits are carried by nanoscale spin swirls-skyrmions-driven along magnetic strips. Stability of the skyrmions is a critical issue for realising this technology. Here we demonstrate that the racetrack skyrmion lifetime can be calculated from first principles as a function of temperature, magnetic field and track width. Our method combines harmonic transition state theory extended to include Goldstone modes, with an atomistic spin Hamiltonian parametrized from density functional theory calculations. We demonstrate that two annihilation mechanisms contribute to the skyrmion stability: At low external magnetic field, escape through the track boundary prevails, but a crossover field exists, above which the collapse in the interior becomes dominant. Considering a Pd/Fe bilayer on an Ir(111) substrate as a well-established model system, the calculated skyrmion lifetime is found to be consistent with reported experimental measurements. Our simulations also show that the Arrhenius pre-exponential factor of escape depends only weakly on the external magnetic field, whereas the pre-exponential factor for collapse is strongly field dependent. Our results open the door for predictive simulations, free from empirical parameters, to aid the design of skyrmion-based information technology.
- Published
- 2018
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138. Microbial regulation of the L cell transcriptome.
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Arora T, Akrami R, Pais R, Bergqvist L, Johansson BR, Schwartz TW, Reimann F, Gribble FM, and Bäckhed F
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- Animals, Computational Biology methods, Enteroendocrine Cells ultrastructure, Gastrointestinal Microbiome, Gene Expression Profiling, Gene Expression Regulation, Gene Ontology, Glucagon-Like Peptide 1 genetics, Glucagon-Like Peptide 1 metabolism, Mice, Mice, Transgenic, Enteroendocrine Cells metabolism, Enteroendocrine Cells microbiology, Host-Pathogen Interactions genetics, Microbiota, Transcriptome
- Abstract
L cells are an important class of enteroendocrine cells secreting hormones such as glucagon like peptide-1 and peptide YY that have several metabolic and physiological effects. The gut is home to trillions of bacteria affecting host physiology, but there has been limited understanding about how the microbiota affects gene expression in L cells. Thus, we rederived the reporter mouse strain, GLU-Venus expressing yellow fluorescent protein under the control of the proglucagon gene, as germ-free (GF). L
pos cells from ileum and colon of GF and conventionally raised (CONV-R) GLU-Venus mice were isolated and subjected to transcriptomic profiling. We observed that the microbiota exerted major effects on ileal L cells. Gene Ontology enrichment analysis revealed that microbiota suppressed biological processes related to vesicle localization and synaptic vesicle cycling in Lpos cells from ileum. This finding was corroborated by electron microscopy of Lpos cells showing reduced numbers of vesicles as well as by demonstrating decreased intracellular GLP-1 content in primary cultures from ileum of CONV-R compared with GF GLU-Venus mice. By analysing Lpos cells following colonization of GF mice we observed that the greatest transcriptional regulation was evident within 1 day of colonization. Thus, the microbiota has a rapid and pronounced effect on the L cell transcriptome, predominantly in the ileum.- Published
- 2018
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139. Assessment of continuous pain in newborns admitted to NICUs in 18 European countries.
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Anand KJS, Eriksson M, Boyle EM, Avila-Alvarez A, Andersen RD, Sarafidis K, Polkki T, Matos C, Lago P, Papadouri T, Attard-Montalto S, Ilmoja ML, Simons S, Tameliene R, van Overmeire B, Berger A, Dobrzanska A, Schroth M, Bergqvist L, Courtois E, Rousseau J, and Carbajal R
- Subjects
- Europe, Female, Humans, Infant, Newborn, Infant, Premature, Male, Prospective Studies, Respiration, Artificial, Chronic Pain diagnosis, Intensive Care Units, Neonatal statistics & numerical data, Pain Measurement statistics & numerical data
- Abstract
Aim: Continuous pain occurs routinely, even after invasive procedures, or inflammation and surgery, but clinical practices associated with assessments of continuous pain remain unknown., Methods: A prospective cohort study in 243 neonatal intensive care units (NICUs) from 18 European countries recorded the frequency of pain assessments, use of mechanical ventilation, sedation, analgesia or neuromuscular blockade for each neonate for up to 28 days after NICU admission., Results: Only 2113 of 6648 (31.8%) of neonates received assessments of continuous pain, occurring variably among tracheal ventilation (TrV, 46.0%), noninvasive ventilation (NiV, 35.0%) and no ventilation (NoV, 20.1%) groups (p < 0.001). Daily assessments for continuous pain occurred in only 10.4% of all neonates (TrV: 14.0%, NiV: 10.7%, NoV: 7.6%; p < 0.001). More frequent assessments of continuous pain occurred in NICUs with pain guidelines, nursing champions and surgical admissions (all p < 0.01), and for newborns <32 weeks gestational age, those requiring ventilation, or opioids, sedatives-hypnotics, general anaesthetics (O-SH-GA) (all p < 0.001), or surgery (p = 0.028). Use of O-SH-GA drugs increased the odds for pain assessment in the TrV (OR:1.60, p < 0.001) and NiV groups (OR:1.40, p < 0.001)., Conclusion: Assessments of continuous pain occurred in less than one-third of NICU admissions and daily in only 10% of neonates. NICU clinical practices should consider including routine assessments of continuous pain in newborns., (©2017 Foundation Acta Paediatrica. Published by John Wiley & Sons Ltd.)
- Published
- 2017
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140. First Principles Theory of the hcp-fcc Phase Transition in Cobalt.
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Lizárraga R, Pan F, Bergqvist L, Holmström E, Gercsi Z, and Vitos L
- Abstract
Identifying the forces that drive a phase transition is always challenging. The hcp-fcc phase transition that occurs in cobalt at ~700 K has not yet been fully understood, although early theoretical studies have suggested that magnetism plays a main role in the stabilization of the fcc phase at high temperatures. Here, we perform a first principles study of the free energies of these two phases, which we break into contributions arising from the vibration of the lattice, electronic and magnetic systems and volume expansion. Our analysis of the energy of the phases shows that magnetic effects alone cannot drive the fcc-hcp transition in Co and that the largest contribution to the stabilization of the fcc phase comes from the vibration of the ionic lattice. By including all the contributions to the free energy considered here we obtain a theoretical transition temperature of 825 K.
- Published
- 2017
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141. Resistive graphene humidity sensors with rapid and direct electrical readout.
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Smith AD, Elgammal K, Niklaus F, Delin A, Fischer AC, Vaziri S, Forsberg F, Råsander M, Hugosson H, Bergqvist L, Schröder S, Kataria S, Östling M, and Lemme MC
- Abstract
We demonstrate humidity sensing using a change of the electrical resistance of single-layer chemical vapor deposited (CVD) graphene that is placed on top of a SiO2 layer on a Si wafer. To investigate the selectivity of the sensor towards the most common constituents in air, its signal response was characterized individually for water vapor (H2O), nitrogen (N2), oxygen (O2), and argon (Ar). In order to assess the humidity sensing effect for a range from 1% relative humidity (RH) to 96% RH, the devices were characterized both in a vacuum chamber and in a humidity chamber at atmospheric pressure. The measured response and recovery times of the graphene humidity sensors are on the order of several hundred milliseconds. Density functional theory simulations are employed to further investigate the sensitivity of the graphene devices towards water vapor. The interaction between the electrostatic dipole moment of the water and the impurity bands in the SiO2 substrate leads to electrostatic doping of the graphene layer. The proposed graphene sensor provides rapid response direct electrical readout and is compatible with back end of the line (BEOL) integration on top of CMOS-based integrated circuits.
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- 2015
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142. Tensile strain-induced softening of iron at high temperature.
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Li X, Schönecker S, Simon E, Bergqvist L, Zhang H, Szunyogh L, Zhao J, Johansson B, and Vitos L
- Abstract
In weakly ferromagnetic materials, already small changes in the atomic configuration triggered by temperature or chemistry can alter the magnetic interactions responsible for the non-random atomic-spin orientation. Different magnetic states, in turn, can give rise to substantially different macroscopic properties. A classical example is iron, which exhibits a great variety of properties as one gradually removes the magnetic long-range order by raising the temperature towards its Curie point of TC°= 1043 K. Using first-principles theory, here we demonstrate that uniaxial tensile strain can also destabilise the magnetic order in iron and eventually lead to a ferromagnetic to paramagnetic transition at temperatures far below TC°. In consequence, the intrinsic strength of the ideal single-crystal body-centred cubic iron dramatically weakens above a critical temperature of ~500 K. The discovered strain-induced magneto-mechanical softening provides a plausible atomic-level mechanism behind the observed drop of the measured strength of Fe whiskers around 300-500 K. Alloying additions which have the capability to partially restore the magnetic order in the strained Fe lattice, push the critical temperature for the strength-softening scenario towards the magnetic transition temperature of the undeformed lattice. This can result in a surprisingly large alloying-driven strengthening effect at high temperature as illustrated here in the case of Fe-Co alloy.
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- 2015
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143. Sedation and analgesia practices in neonatal intensive care units (EUROPAIN): results from a prospective cohort study.
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Carbajal R, Eriksson M, Courtois E, Boyle E, Avila-Alvarez A, Andersen RD, Sarafidis K, Polkki T, Matos C, Lago P, Papadouri T, Montalto SA, Ilmoja ML, Simons S, Tameliene R, van Overmeire B, Berger A, Dobrzanska A, Schroth M, Bergqvist L, Lagercrantz H, and Anand KJ
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- Analgesics, Opioid therapeutic use, Birth Weight, Conscious Sedation methods, Europe, Female, Gestational Age, Humans, Infant, Newborn, Male, Midazolam therapeutic use, Propensity Score, Prospective Studies, Respiration, Artificial methods, Respiration, Artificial statistics & numerical data, Analgesics therapeutic use, Conscious Sedation statistics & numerical data, Hypnotics and Sedatives therapeutic use, Intensive Care Units, Neonatal statistics & numerical data
- Abstract
Background: Neonates who are in pain or are stressed during care in the intensive care unit (ICU) are often given sedation or analgesia. We investigated the current use of sedation or analgesia in neonatal ICUs (NICUs) in European countries., Methods: EUROPAIN (EUROpean Pain Audit In Neonates) was a prospective cohort study of the management of sedation and analgesia in patients in NICUs. All neonates admitted to NICUs during 1 month were included in this study. Data on demographics, methods of respiration, use of continuous or intermittent sedation, analgesia, or neuromuscular blockers, pain assessments, and drug withdrawal syndromes were gathered during the first 28 days of admission to NICUs. Multivariable linear regression models and propensity scores were used to assess the association between duration of tracheal ventilation (TV) and exposure to opioids, sedatives-hypnotics, or general anaesthetics in neonates (O-SH-GA). This study is registered with ClinicalTrials.gov, number NCT01694745., Findings: From Oct 1, 2012, to June 30, 2013, 6680 neonates were enrolled in 243 NICUs in 18 European countries. Mean gestational age of these neonates was 35.0 weeks (SD 4.6) and birthweight was 2384 g (1007). 2142 (32%) neonates were given TV, 1496 (22%) non-invasive ventilation (NIV), and 3042 (46%) were kept on spontaneous ventilation (SV). 1746 (82%), 266 (18%), and 282 (9%) neonates in the TV, NIV, and SV groups, respectively, were given sedation or analgesia as a continuous infusion, intermittent doses, or both (p<0.0001). In the participating NICUs, the median use of sedation or analgesia was 89.3% (70.0-100) for neonates in the TV group. Opioids were given to 1764 (26%) of 6680 neonates and to 1589 (74%) of 2142 neonates in the TV group. Midazolam was given to 576 (9%) of 6680 neonates and 536 (25%) neonates of 2142 neonates in the TV group. 542 (25%) neonates in the TV group were given neuromuscular blockers, which were administered as continuous infusions to 146 (7%) of these neonates. Pain assessments were recorded in 1250 (58%) of 2138, 672 (45%) of 1493, and 916 (30%) of 3017 neonates in the TV, NIV, and SV groups, respectively (p<0.0001). In the univariate analysis, neonates given O-SH-GA in the TV group needed a longer duration of TV than did those who were not given O-SH-GA (mean 136.2 h [SD 173.1] vs 39.8 h [94.7] h; p<0.0001). Multivariable and propensity score analyses confirmed this association (p<0.0001)., Interpretation: Wide variations in sedation and analgesia practices occur between NICUs and countries. Widespread use of O-SH-GA in intubated neonates might prolong their need for mechanical ventilation, but further research is needed to investigate the therapeutic and adverse effects of O-SH-GA in neonates, and to develop new and safe approaches for sedation and analgesia., Funding: European Community's Seventh Framework Programme., (Copyright © 2015 Elsevier Ltd. All rights reserved.)
- Published
- 2015
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144. Energy and magnetization transport in nonequilibrium macrospin systems.
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Borlenghi S, Iubini S, Lepri S, Chico J, Bergqvist L, Delin A, and Fransson J
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- Motion, Periodicity, Temperature, Magnetic Phenomena, Models, Theoretical
- Abstract
We investigate numerically the magnetization dynamics of an array of nanodisks interacting through the magnetodipolar coupling. In the presence of a temperature gradient, the chain reaches a nonequilibrium steady state where energy and magnetization currents propagate. This effect can be described as the flow of energy and particle currents in an off-equilibrium discrete nonlinear Schrödinger (DNLS) equation. This model makes transparent the transport properties of the system and allows for a precise definition of temperature and chemical potential for a precessing spin. The present study proposes a setup for the spin-Seebeck effect, and shows that its qualitative features can be captured by a general oscillator-chain model.
- Published
- 2015
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145. Atomistic spin dynamics and surface magnons.
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Etz C, Bergqvist L, Bergman A, Taroni A, and Eriksson O
- Abstract
Atomistic spin dynamics simulations have evolved to become a powerful and versatile tool for simulating dynamic properties of magnetic materials. It has a wide range of applications, for instance switching of magnetic states in bulk and nano-magnets, dynamics of topological magnets, such as skyrmions and vortices and domain wall motion. In this review, after a brief summary of the existing investigation tools for the study of magnons, we focus on calculations of spin-wave excitations in low-dimensional magnets and the effect of relativistic and temperature effects in such structures. In general, we find a good agreement between our results and the experimental values. For material specific studies, the atomistic spin dynamics is combined with electronic structure calculations within the density functional theory from which the required parameters are calculated, such as magnetic exchange interactions, magnetocrystalline anisotropy, and Dzyaloshinskii-Moriya vectors.
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- 2015
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146. Coherent energy transport in classical nonlinear oscillators: An analogy with the Josephson effect.
- Author
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Borlenghi S, Iubini S, Lepri S, Bergqvist L, Delin A, and Fransson J
- Subjects
- Finite Element Analysis, Magnetic Fields, Models, Theoretical, Nanostructures chemistry, Periodicity, Computer Simulation, Nonlinear Dynamics, Thermodynamics
- Abstract
By means of a simple theoretical model and numerical simulations, we demonstrate the presence of persistent energy currents in a lattice of classical nonlinear oscillators with uniform temperature and chemical potential. In analogy with the well-known Josephson effect, the currents are proportional to the sine of the phase differences between the oscillators. Our results elucidate general aspects of nonequilibrium thermodynamics and point towards a way to practically control transport phenomena in a large class of systems. We apply the model to describe the phase-controlled spin-wave current in a bilayer nanopillar.
- Published
- 2015
- Full Text
- View/download PDF
147. Detection of morphine-3-sulfate and morphine-6-sulfate in human urine and plasma, and formation in liver cytosol.
- Author
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Andersson M, Björkhem-Bergman L, Ekström L, Bergqvist L, Lagercrantz H, Rane A, and Beck O
- Abstract
Morphine is still the mainstay in treatment of severe pain and is metabolized in the liver mainly by glucuronidation, partly to the pharmacologically active morphine-6-glucuronide (M6G). The sulfation pathway has attracted much less attention but may also form active metabolites. The aim of the present study was to study two sulfate metabolites of morphine in humans. Urine and plasma from newborns, adult heroin addicts, and terminal cancer patients was analyzed for the presence of morphine-3-sulfate (M3S) and morphine-6-sulfate (M6S) by a new liquid chromatography - tandem mass spectrometry (LC-MS/MS) method. In addition, morphine sulfation was studied in vitro in human liver cytosol preparations. M3S was present in urine and plasma from all study groups although at lower concentrations than morphine-3-glucuronide (M3G). The plasma M3S/M3G ratio was 30 times higher in newborns than in adults indicating that the relative sulfation is more important at early stage of life. M6S was measurable in only one plasma sample from a newborn patient, and in one of the urine sample from the drug testing group. The incubation of morphine with liver cytosol extracts resulted in approximately equal rate of formation of both M3S and M6S. In conclusion, sulfation of morphine is catalyzed in human liver but this minor metabolic pathway probably lacks clinical significance. The M6S metabolite is formed at a low rate, making it undetectable in most individuals.
- Published
- 2014
- Full Text
- View/download PDF
148. Designing a spin-Seebeck diode.
- Author
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Borlenghi S, Wang W, Fangohr H, Bergqvist L, and Delin A
- Abstract
Using micromagnetic simulations, we have investigated spin dynamics in a spin-valve bilayer in the presence of a thermal gradient. The direction and the intensity of the gradient allow us to excite the spin wave modes of each layer selectively. This permits us to synchronize the magnetization precession of the two layers and to rectify the flows of energy and magnetization through the system. Our study yields promising opportunities for applications in spin caloritronics and nanophononics devices.
- Published
- 2014
- Full Text
- View/download PDF
149. Density functional theory study of the electronic structure of fluorite Cu2Se.
- Author
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Råsander M, Bergqvist L, and Delin A
- Abstract
We have investigated the electronic structure of fluorite Cu2Se using density functional theory calculations within the LDA, PBE and AM05 approximations as well as the non-local hybrid PBE0 and HSE approximations. We find that Cu2Se is a zero gap semiconductor when using either a local or semi-local density functional approximation while the PBE0 functional opens up a gap. For the HSE approximation, we find that the presence of a gap depends on the range separation for the non-local exchange. For the occupied part in the density of states we find that LDA, PBE, AM05, PBE0 and HSE agree with regard to the overall electronic structure. However, the hybrid functionals result in peaks shifted towards lower energy compared to LDA, PBE and AM05. The valence bands obtained using the hybrid functionals are in good agreement with experimental valence band spectra. We also find that the PBE, PBE0 and HSE approximations give similar results regarding bulk properties, such as lattice constants and bulk modulus. In addition, we have investigated the localization of the Cu d-states and its effect on the band gap in the material using the LDA + U approach. We find that a sufficiently high U indeed opens up a gap; however, this U leads to valence bands that disagree with experimental observations.
- Published
- 2013
- Full Text
- View/download PDF
150. Microscopic model for ultrafast remagnetization dynamics.
- Author
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Chimata R, Bergman A, Bergqvist L, Sanyal B, and Eriksson O
- Abstract
In this Letter, we provide a microscopic model for the ultrafast remagnetization of atomic moments already quenched above the Stoner-Curie temperature by a strong laser fluence. Combining first-principles density functional theory, atomistic spin dynamics utilizing the Landau-Lifshitz-Gilbert equation, and a three-temperature model, we analyze the temporal evolution of atomic moments as well as the macroscopic magnetization of bcc Fe and hcp Co covering a broad time scale, ranging from femtoseconds to picoseconds. Our simulations show a variety of complex temporal behavior of the magnetic properties resulting from an interplay between electron, spin, and lattice subsystems, which causes an intricate time evolution of the atomic moment, where longitudinal and transversal fluctuations result in a macrospin moment that evolves highly nonmonotonically.
- Published
- 2012
- Full Text
- View/download PDF
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