Search

Your search keyword '"Tibell A"' showing total 2,866 results
Start Over Author "Tibell A"

Refine your results

more »

more »

more »

more »

more »

more »
2,866 results on '"Tibell A"'

203. Insulin secretion rates estimated by two mathematical methods in pancreas-kidney transplant recipients

Author

Christiansen, Erik, Kjems, Lise L., Volund, Aage, Tibell, Annika, Binder, Christian, and Madsbad, Sten

Subjects
C-peptide -- Measurement, Insulin -- Physiological aspects, Secretion -- Measurement, Biological sciences
Abstract

The deconvolution method and the combined model were used to estimate the kinetic parameters of the C-peptide and the insulin secretion rate in pancreas-kidney transplant patients during periods of slow and fast changes in insulin secretion. The estimation of individual kinetic parameters is a useful method of evaluating the insulin secretion in transplant patients. Further, insulin secretion in the test subjects were still defective even after transplantation.

Published
1998

204. Survival of Macroencapsulated Allogeneic Parathyroid Tissue One Year after Transplantation in Nonimmunosuppressed Humans

Author

Annika Tibell M.D., Ph.D., Ehab Rafael, Lars Wennberg, Jörgen Nordenström, Mats Bergström, Robin L. Geller, Thomas Loudovaris, Robert C. Johnson, James H. Brauker, Steven Neuenfeldt, and Annika Wernerson

Subjects
Medicine
Abstract

The use of immunoisolation devices may allow transplantation without need for immunosuppression and could widen the indications for cell transplantation. In this study, we evaluated the survival of encapsulated parathyroid tissue in nonimmunosuppressed humans. Autologous parathyroid implants: Seven patients under-going parathyroidectomy had devices containing small pieces of their own parathyroid tissue implanted SC. These devices were explanted after 2–4 weeks for histological evaluation. Allogeneic parathyroid implants: Four patients with chronic hypoparathyroidism were transplanted with one to three large (40 μl) and one small (4.5 μl) device filled with meshed parathyroid tissue and implanted SC. The small devices were explanted at 4 weeks, while the large ones were explanted 8.5 to 14 months after implantation. In both studies, control implants were placed in nude mice. Autologous study results: At explantation, the grafts consisted of 22 ± 6% endocrine tissue and 63 ± 7% fibrosis, while 15 ± 5% of the grafts were necrotic. Allogeneic study results: In devices explanted from the patients at 4 weeks, fibrosis dominated and only 1%, 5%, and 23% of the grafts consisted of endocrine tissue. A similar histological appearance was found in grafts from nude mice. In devices explanted at 8.5–14 months, histologically intact endocrine tissue was found in all patients. However, nearly all the tissue consisted of fibrosis. There was no detectable increase in the parathormone (PTH) level in all patients. Macroencapsulated human allogeneic parathyroid tissue can survive up to 1 year after transplantation into nonimmunosuppressed patients. However, marked fibroblast overgrowth occurred, especially in the allogeneic implant study, using meshed parathyroid tissue. This was probably not related to the allo-response, because similar findings were observed in the nude mouse implants. In future studies, better tissue preparation and improvements in the physiological milieu inside the device may help to reduce fibroblast overgrowth and increase survival of the parathyroid cells.

Published
2001
Full Text
View/download PDF

209. Longitudinal Studies on the Microcirculation around the TheraCyte™ Immunoisolation Device, Using the Laser Doppler Technique

Author

E. Rafael, B. Gazelius, G. S. Wu, and A. Tibell

Subjects
Medicine
Abstract

Encapsulation of cellular grafts in an immunoisolation membrane device may make it possible to perform transplantation without having to give immunosuppressive drugs. A common problem is the development of an avascular fibrotic zone around the implants, leading to impaired graft survival. The TheraCyte™ macroencapsulation device has therefore been designed to facilitate neovascularization of the device's surface. In this study, we evaluated the microcirculation around empty TheraCyte™ devices implanted SC in rats at various times after implantation, using a laser Doppler probe introduced via the device port. Studies were performed on day 1 or at 1, 2, and 4 weeks or at 2, 3, and 12 months after implantation. The mean flow was 158 ± 42, 148 ± 50, 133 ± 28, 72 ± 17, 138 ± 41, 165 ± 43, and 160 ± 29 perfusion units (PU), respectively. Thus, the microcirculation around the device was significantly reduced at 4 weeks after implantation (p < 0.01) while, from 2 months onwards the circulation had improved and did not differ significantly from that on day 1. The present study shows time-related changes in the microcirculatory flow around TheraCyte™ macroencapsulation devices that agree with our previous microdialysis studies on in vivo exchange of insulin and glucose between the device and the circulation. Laser Doppler flowmetry seems to provide a reliable technique for screening blood perfusion around macroencapsulation devices.

Published
2000
Full Text
View/download PDF

210. A phylogeny for the plant pathogen Piptoporellus baudonii using a multigene data set

Author

Tibuhwa, Donatha, Hussein, Juma, Ryvarden, Leif, Sijaona, Mark E. R., Tibell, Sanja, Tibuhwa, Donatha, Hussein, Juma, Ryvarden, Leif, Sijaona, Mark E. R., and Tibell, Sanja

Abstract

Piptoporellus baudonii is proposed as a new combination for Laetiporus baudonii in the Polyporales (Basidiomycota) based on morphological and molecular features. This parasitic macrofungus attacks cashew trees, Eucalyptus, cassava, Tectona, and some indigenous trees in southern regions of Tanzania and poses a serious threat to agroforestry and livelihood conditions in the area. Phylogenetic trees were produced from partial sequences of three rDNA gene regions and a portion of translation elongation factor 1-alpha (TEF1) gene of Laetiporus baudonii for comparisons with samples from the antrodia clade. Our results reveal a strongly supported group of L. baudonii with Piptoporellus in Fomitopsidaceae. Piptoporellus baudonii shares many morphological features with other members of Piptoporellus but differs from them in having broadly ellipsoid or rarely ovoid basidiospores. Both morphological and phylogenetic evidence justify the placement of L. baudonii in Piptoporellus together with the three other known species in the genus.

Published
2020
Full Text
View/download PDF

211. Engaging With Biology by Asking Questions: Investigating Students’ Interaction and Learning With an Artificial Intelligence-Enriched Textbook

Author

Koc-Januchta, Marta, Schönborn, Konrad, Tibell, Lena, Chaudhri, Vinay K., Heller, H. Craig, Koc-Januchta, Marta, Schönborn, Konrad, Tibell, Lena, Chaudhri, Vinay K., and Heller, H. Craig

Abstract

Applying artificial intelligence (AI) to support science learning is a prominent aspect of the digital education revolution. This study investigates students’ interaction and learning with an AI book, which enables the inputting of questions and receiving of suggested questions to understand biology, in comparison with a traditional E-book. Students (n = 16) in a tertiary biology course engaged with the topics of energy in cells and cell signaling. The AI book group (n = 6) interacted with the AI book first followed by the E-book, while the E-book group (n = 10) did so in reverse. Students responded to pre-/posttests and to cognitive load, motivation, and usability questionnaires; and three students were interviewed. All interactions with the books were automatically logged. Results revealed a learning gain and a similar pattern of feature use across both books. Nevertheless, asking questions with the AI book was associated with higher retention and correlated positively with viewing visual representations more often. Students with a higher intrinsic motivation to know and to experience stimulation perceived book usability more favorably. Interviews revealed that posing and receiving suggested questions was helpful, while ideas for future development included more personalized feedback. Future research shall explore how learning can be benefitted with the AI-enriched book., Funding agencies: Marcus and Amalia Wallenberg Foundation [MAW 2014.0107]

Published
2020
Full Text
View/download PDF

212. What’s in the body? Children’s annotated drawings

Author

Andersson, Johanna, Löfgren, Ragnhild, Tibell, Lena, Andersson, Johanna, Löfgren, Ragnhild, and Tibell, Lena

Abstract

This paper presents a study of children’s ideas of the body’s internal structure. Children between four and 13 years (N = 170) individually produced drawings. During each drawing session the children explained their drawings to a facilitator and added written labels either by them- selves or, if they were too young to write, with the facilitator’s help. The results provide an updated comprehensive picture of children in differ- ent age groups and their views on the internal structure of the body. The type and numbers of organs drawn are similar to those documented in previous studies. However, in comparison to recent studies, the children drew more organs, the brain was indicated almost as often as the heart, and the Valentine heart was frequently used as a symbol. In contrast with previous research, children drew connections between organs. This result calls for caution regarding conclusions made from decontextua- lized questions. The importance of providing children with the opportu- nity to clarify their drawings is emphasised since it otherwise becomes a question of the researcher’s interpretation. The connections they draw, and explanations they give to their drawings, have interesting implica- tions for understanding children’s ideas, and hence both for teaching and learning and for science education research.

Published
2020
Full Text
View/download PDF

213. Increasing preparedness for caregiving and death in family caregivers of patients with severe illness who are cared for at home : Study protocol for a web-based intervention

Author

Alvariza, Anette, Häger-Tibell, Louise, Holm, Maja, Steineck, Gunnar, Kreicbergs, Ulrika, Alvariza, Anette, Häger-Tibell, Louise, Holm, Maja, Steineck, Gunnar, and Kreicbergs, Ulrika

Abstract

BACKGROUND: Family caregivers of patients with severe illness and in need for a palliative care approach, face numerous challenges and report having insufficient preparedness for the caregiver role as well as a need for information and psychosocial support. Preparing to care for a severely ill family members also means becoming aware of death. Feelings of being prepared are associated with positive aspects and regarded protective against negative health consequences. METHODS: The study adheres to the SPIRIT-guidelines (Supplementary 1), uses a pre-post design and include a web-based intervention. Inclusion criteria are; being a family caregiver of a patient with severe illness and in need of a palliative care approach. The intervention which aims to increase preparedness for caregiving and death is grounded in theory, research and clinical experience. The topics cover: medical issues, symptoms and symptom relief; communication within the couple, how to spend the time before death, being a caregiver, planning for the moment of death and; considerations of the future. The intervention is presented through videos and informative texts. The website also holds an online peer-support discussion forum. Study aims are to: evaluate feasibility in terms of framework, content, usage and partners' experiences; explore how the use of the website, influences family caregivers' preparedness for caregiving and death; explore how the use of the website influences family caregivers' knowledge about medical issues, their communication with the patient and their considerations of the future; and to investigate how the family caregivers' preparedness for caregiving and death influences their physical and psychological health and quality of life 1 year after the patient's death. Data will be collected through qualitative interviews and a study-specific questionnaire at four time-points. DISCUSSION: This project will provide information about whether support via a website has the potentia

Published
2020
Full Text
View/download PDF

216. The study of prompt and delayed muon induced fission: III. The ratios of prompt to delayed fission yields

Author

Rösel, Ch., Hänscheid, H., Hartfiel, J., von Mutius, R., van Enschut, J. F. M. d'Achard, David, P., Janszen, H., Johansson, T., Konijn, J., Krogulski, T., de Laat, C. T. A. M., Paganetti, H., Petitjean, C., Polikanov, S. M., Reist, H. W., Risse, F., Schaller, L. A., Schellenberg, L., Schrieder, W., Sinha, A. K., Taal, A., Theobald, J. P., Tibell, G., and Trautmann, N.

Published
1993
Full Text
View/download PDF

222. Students’ Meaning-Making of Nutrient Uptake in Relation to Organizational Levels.

Author

PETTERSSON, ALMA JAHIC, RUNDGREN, CARL-JOHAN, and TIBELL, LENA A. E.

Subjects
NUTRIENT uptake, CLASSROOMS, TEACHER influence, STUDENTS
Abstract

Previous research suggests that everyday expressions are commonly used in students’ descriptions of nutrient uptake. This study investigate a classroom context in year 5 with a focus on signs of scientific meaning-making about nutrient uptake with an animation as a resource in two different schools. In one of the schools there was also a teacher review. The aim of this study is to investigate the pedagogical affordances of scientific terms and everyday expressions in the animation and in classroom teaching. Further, students’ signs of scientific meaning-making at the meso and submicro organizational level in group discussions and written descriptions are analyzed and if taking part of a teacher review influenced the students’ use of scientific terms and everyday expressions.The results show that the students who had a teacher review use everyday expressions at the meso and submicro level to a greater extent than the students who did not have an teacher review. The everyday expressions are often used as a kind of translation from the scientific terms in the students’ drawings. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

229. Aspicilia goettweigensis(Megasporaceae, lichenized Ascomycetes) - a poorly known and overlooked species in Europe and Russia

Author

Jan Vondrák, Anders Nordin, Ivan V. Frolov, Leif Tibell, and Alexander Paukov

Subjects
0106 biological sciences, 0301 basic medicine, biology, Aspicilia subdepressa, Plant Science, 030108 mycology & parasitology, biology.organism_classification, Aspicilia goettweigensis, 010603 evolutionary biology, 01 natural sciences, Thallus, Megasporaceae, 03 medical and health sciences, Aspicilia, Stictic acid, chemistry.chemical_compound, chemistry, Close relationship, Botany, Key (lock), Ecology, Evolution, Behavior and Systematics
Abstract

Aspicilia goettweigensis is a poorly known species from xerothermic siliceous rocks in Europe. It is considered to be common in the Czech Republic and it is new to Hungary and Russia. The main diagnostic character is formation of cracked, popcorn-like, areoles in the central parts of the thalli. Analysis of nrITS sequences revealed its close relationship to Aspicilia subdepressa and A. volcanica. TLC revealed stictic acid in analysed A. goettweigensis samples. A key to non-lobate Aspicilia with stictic acid known from Europe is provided.

Published
2016
Full Text
View/download PDF

231. Polyblastia

Author

Tibell, Sanja, Tibell, Leif, Tibell, Sanja, and Tibell, Leif

Published
2017

232. Atla

Author

Tibell, Sanja, Tibell, Leif, Pykälä, Juha, Tibell, Sanja, Tibell, Leif, and Pykälä, Juha

Published
2017

236. What can student-generated animations tell us about students' conceptions of evolution?

Author

Orraryd, Daniel and Tibell, Lena A. E.

Subjects
SECONDARY school students, NATURAL selection, CONCEPTION
Abstract

Background: A large body of research has investigated students' conceptions of evolutionary changes and emphasizes that students have alternative conceptions about their causes. A conventional way to monitor students' conceptions is through inventories where researchers analyse their written answers. However, textbooks are being increasingly complemented with, or even replaced by, various multimedia materials where multiple modes are used to communicate evolutionary processes. This has profound implications for students' learning, and highlights that allowing different modes of expression may influence which knowledge they present. Therefore, the goal of this exploratory study is to expand the understanding of students' conceptions of evolution through natural selection by applying student-generated stop-motion animations to reveal their conceptions. Forty-seven Swedish upper secondary school students generated 18 animations concerning evolution through natural selection. We analysed these animations qualitatively using content analysis to reveal key concepts, alternative conceptions and connections between organizational levels and time. This analysis is related to findings from previous studies on students' conceptions of evolutionary change. Results: Our study highlights some of the benefits and limitations of using these two assessment methods. In terms of identifying alternative conceptions, a clear difference between the results of the two methods of assessment was observed. In particular, the alternative conception of essentialism appeared to a lesser extent in the student's animations than in their written responses, while natural selection as an event was more prevalent. Conclusions: These findings support the view that students' expression of different misconceptions is influenced by the context and representational form. The work also reveals that generating stop-motion animations to explain scientific concepts is an engaging approach that stimulates students to explore their understanding in a creative and personal manner. This is potentially positive for engagement and learning. The potential for complementing standard paper-and-pen tests with tasks that encompass stop-motion animations is also discussed. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

237. Considerations and consequences of allowing DNA sequence data as types of fungal taxa

Author

Zamora, Juan Carlos, primary, Svensson, Måns, additional, Kirschner, Roland, additional, Olariaga, Ibai, additional, Ryman, Svengunnar, additional, Parra, Luis Alberto, additional, Geml, József, additional, Rosling, Anna, additional, Adamčík, Slavomír, additional, Ahti, Teuvo, additional, Aime, M. Catherine, additional, Ainsworth, A. Martyn, additional, Albert, László, additional, Albertó, Edgardo, additional, García, Alberto Altés, additional, Ageev, Dmitry, additional, Agerer, Reinhard, additional, Aguirre-Hudson, Begoña, additional, Ammirati, Joe, additional, Andersson, Harry, additional, Angelini, Claudio, additional, Antonín, Vladimír, additional, Aoki, Takayuki, additional, Aptroot, André, additional, Argaud, Didier, additional, Sosa, Blanca Imelda Arguello, additional, Aronsen, Arne, additional, Arup, Ulf, additional, Asgari, Bita, additional, Assyov, Boris, additional, Atienza, Violeta, additional, Bandini, Ditte, additional, Baptista-Ferreira, João Luís, additional, Baral, Hans-Otto, additional, Baroni, Tim, additional, Barreto, Robert Weingart, additional, Beker, Henry, additional, Bell, Ann, additional, Bellanger, Jean-Michel, additional, Bellù, Francesco, additional, Bemmann, Martin, additional, Bendiksby, Mika, additional, Bendiksen, Egil, additional, Bendiksen, Katriina, additional, Benedek, Lajos, additional, Bérešová-Guttová, Anna, additional, Berger, Franz, additional, Berndt, Reinhard, additional, Bernicchia, Annarosa, additional, Biketova, Alona Yu., additional, Bizio, Enrico, additional, Bjork, Curtis, additional, Boekhout, Teun, additional, Boertmann, David, additional, Böhning, Tanja, additional, Boittin, Florent, additional, Boluda, Carlos G., additional, Boomsluiter, Menno W., additional, Borovička, Jan, additional, Brandrud, Tor Erik, additional, Braun, Uwe, additional, Brodo, Irwin, additional, Bulyonkova, Tatiana, additional, Burdsall, Harold H., additional, Buyck, Bart, additional, Burgaz, Ana Rosa, additional, Calatayud, Vicent, additional, Callac, Philippe, additional, Campo, Emanuele, additional, Candusso, Massimo, additional, Capoen, Brigitte, additional, Carbó, Joaquim, additional, Carbone, Matteo, additional, Castañeda-Ruiz, Rafael F., additional, Castellano, Michael A., additional, Chen, Jie, additional, Clerc, Philippe, additional, Consiglio, Giovanni, additional, Corriol, Gilles, additional, Courtecuisse, Régis, additional, Crespo, Ana, additional, Cripps, Cathy, additional, Crous, Pedro W., additional, da Silva, Gladstone Alves, additional, da Silva, Meiriele, additional, Dam, Marjo, additional, Dam, Nico, additional, Dämmrich, Frank, additional, Das, Kanad, additional, Davies, Linda, additional, De Crop, Eske, additional, De Kesel, Andre, additional, De Lange, Ruben, additional, De Madrignac Bonzi, Bárbara, additional, dela Cruz, Thomas Edison E., additional, Delgat, Lynn, additional, Demoulin, Vincent, additional, Desjardin, Dennis E., additional, Diederich, Paul, additional, Dima, Bálint, additional, Dios, Maria Martha, additional, Divakar, Pradeep Kumar, additional, Douanla-Meli, Clovis, additional, Douglas, Brian, additional, Drechsler-Santos, Elisandro Ricardo, additional, Dyer, Paul S., additional, Eberhardt, Ursula, additional, Ertz, Damien, additional, Esteve-Raventós, Fernando, additional, Salazar, Javier Angel Etayo, additional, Evenson, Vera, additional, Eyssartier, Guillaume, additional, Farkas, Edit, additional, Favre, Alain, additional, Fedosova, Anna G., additional, Filippa, Mario, additional, Finy, Péter, additional, Flakus, Adam, additional, Fos, Simón, additional, Fournier, Jacques, additional, Fraiture, André, additional, Franchi, Paolo, additional, Molano, Ana Esperanza Franco, additional, Friebes, Gernot, additional, Frisch, Andreas, additional, Fryday, Alan, additional, Furci, Giuliana, additional, Márquez, Ricardo Galán, additional, Garbelotto, Matteo, additional, García-Martín, Joaquina María, additional, Otálora, Mónica A. García, additional, Sánchez, Dania García, additional, Gardiennet, Alain, additional, Garnica, Sigisfredo, additional, Benavent, Isaac Garrido, additional, Gates, Genevieve, additional, da Gerlach, Alice Cruz Lima, additional, Ghobad-Nejhad, Masoomeh, additional, Gibertoni, Tatiana B., additional, Grebenc, Tine, additional, Greilhuber, Irmgard, additional, Grishkan, Bella, additional, Groenewald, Johannes Z., additional, Grube, Martin, additional, Gruhn, Gérald, additional, Gueidan, Cécile, additional, Gulden, Gro, additional, Gusmão, Luis F. P., additional, Hafellner, Josef, additional, Hairaud, Michel, additional, Halama, Marek, additional, Hallenberg, Nils, additional, Halling, Roy E., additional, Hansen, Karen, additional, Harder, Christoffer Bugge, additional, Heilmann-Clausen, Jacob, additional, Helleman, Stip, additional, Henriot, Alain, additional, Hernandez-Restrepo, Margarita, additional, Herve, Raphaël, additional, Hobart, Caroline, additional, Hoffmeister, Mascha, additional, Høiland, Klaus, additional, Holec, Jan, additional, Holien, Håkon, additional, Hughes, Karen, additional, Hubka, Vit, additional, Huhtinen, Seppo, additional, Ivančević, Boris, additional, Jagers, Marian, additional, Jaklitsch, Walter, additional, Jansen, AnnaElise, additional, Jayawardena, Ruvishika S., additional, Jeppesen, Thomas Stjernegaard, additional, Jeppson, Mikael, additional, Johnston, Peter, additional, Jørgensen, Per Magnus, additional, Kärnefelt, Ingvar, additional, Kalinina, Liudmila B., additional, Kantvilas, Gintaras, additional, Karadelev, Mitko, additional, Kasuya, Taiga, additional, Kautmanová, Ivona, additional, Kerrigan, Richard W., additional, Kirchmair, Martin, additional, Kiyashko, Anna, additional, Knapp, Dániel G., additional, Knudsen, Henning, additional, Knudsen, Kerry, additional, Knutsson, Tommy, additional, Kolařík, Miroslav, additional, Kõljalg, Urmas, additional, Košuthová, Alica, additional, Koszka, Attila, additional, Kotiranta, Heikki, additional, Kotkova, Vera, additional, Koukol, Ondřej, additional, Kout, Jiří, additional, Kovács, Gábor M., additional, Kříž, Martin, additional, Kruys, Åsa, additional, Kučera, Viktor, additional, Kudzma, Linas, additional, Kuhar, Francisco, additional, Kukwa, Martin, additional, Kumar, T. K. Arun, additional, Kunca, Vladimír, additional, Kušan, Ivana, additional, Kuyper, Thomas W., additional, Lado, Carlos, additional, Læssøe, Thomas, additional, Lainé, Patrice, additional, Langer, Ewald, additional, Larsson, Ellen, additional, Larsson, Karl-Henrik, additional, Laursen, Gary, additional, Lechat, Christian, additional, Lee, Serena, additional, Lendemer, James C., additional, Levin, Laura, additional, Lindemann, Uwe, additional, Lindström, Håkan, additional, Liu, Xingzhong, additional, Hernandez, Regulo Carlos Llarena, additional, Llop, Esteve, additional, Locsmándi, Csaba, additional, Lodge, Deborah Jean, additional, Loizides, Michael, additional, Lőkös, László, additional, Luangsa-ard, Jennifer, additional, Lüderitz, Matthias, additional, Lumbsch, Thorsten, additional, Lutz, Matthias, additional, Mahoney, Dan, additional, Malysheva, Ekaterina, additional, Malysheva, Vera, additional, Manimohan, Patinjareveettil, additional, Marin-Felix, Yasmina, additional, Marques, Guilhermina, additional, Martínez-Gil, Rubén, additional, Marson, Guy, additional, Mata, Gerardo, additional, Matheny, P. Brandon, additional, Mathiassen, Geir Harald, additional, Matočec, Neven, additional, Mayrhofer, Helmut, additional, Mehrabi, Mehdi, additional, Melo, Ireneia, additional, Mešić, Armin, additional, Methven, Andrew S., additional, Miettinen, Otto, additional, Romero, Ana M. Millanes, additional, Miller, Andrew N., additional, Mitchell, James K., additional, Moberg, Roland, additional, Moreau, Pierre-Arthur, additional, Moreno, Gabriel, additional, Morozova, Olga, additional, Morte, Asunción, additional, Muggia, Lucia, additional, González, Guillermo Muñoz, additional, Myllys, Leena, additional, Nagy, István, additional, Nagy, László G., additional, Neves, Maria Alice, additional, Niemelä, Tuomo, additional, Nimis, Pier Luigi, additional, Niveiro, Nicolas, additional, Noordeloos, Machiel E., additional, Nordin, Anders, additional, Noumeur, Sara Raouia, additional, Novozhilov, Yuri, additional, Nuytinck, Jorinde, additional, Ohenoja, Esteri, additional, Fiuza, Patricia Oliveira, additional, Orange, Alan, additional, Ordynets, Alexander, additional, Ortiz-Santana, Beatriz, additional, Pacheco, Leticia, additional, Pál-Fám, Ferenc, additional, Palacio, Melissa, additional, Palice, Zdeněk, additional, Papp, Viktor, additional, Pärtel, Kadri, additional, Pawlowska, Julia, additional, Paz, Aurelia, additional, Peintner, Ursula, additional, Pennycook, Shaun, additional, Pereira, Olinto Liparini, additional, Daniëls, Pablo Pérez, additional, Capella, Miquel À. Pérez-De-Gregorio, additional, del Amo, Carlos Manuel Pérez, additional, Gorjón, Sergio Pérez, additional, Pérez-Ortega, Sergio, additional, Pérez-Vargas, Israel, additional, Perry, Brian A., additional, Petersen, Jens H., additional, Petersen, Ronald H., additional, Pfister, Donald H., additional, Phukhamsakda, Chayanard, additional, Piątek, Marcin, additional, Piepenbring, Meike, additional, Pino-Bodas, Raquel, additional, Esquivel, Juan Pablo Pinzón, additional, Pirot, Paul, additional, Popov, Eugene S., additional, Popoff, Orlando, additional, Álvaro, María Prieto, additional, Printzen, Christian, additional, Psurtseva, Nadezhda, additional, Purahong, Witoon, additional, Quijada, Luis, additional, Rambold, Gerhard, additional, Ramírez, Natalia A., additional, Raja, Huzefa, additional, Raspé, Olivier, additional, Raymundo, Tania, additional, Réblová, Martina, additional, Rebriev, Yury A., additional, García, Juan de Dios Reyes, additional, Ripoll, Miguel Ángel Ribes, additional, Richard, Franck, additional, Richardson, Mike J., additional, Rico, Víctor J., additional, Robledo, Gerardo Lucio, additional, Barbosa, Flavia Rodrigues, additional, Rodriguez-Caycedo, Cristina, additional, Rodriguez-Flakus, Pamela, additional, Ronikier, Anna, additional, Casas, Luis Rubio, additional, Rusevska, Katerina, additional, Saar, Günter, additional, Saar, Irja, additional, Salcedo, Isabel, additional, Martínez, Sergio M. Salcedo, additional, Montoya, Carlos A. Salvador, additional, Sánchez-Ramírez, Santiago, additional, Sandoval-Sierra, J. Vladimir, additional, Santamaria, Sergi, additional, Monteiro, Josiane Santana, additional, Schroers, Hans Josef, additional, Schulz, Barbara, additional, Schmidt-Stohn, Geert, additional, Schumacher, Trond, additional, Senn-Irlet, Beatrice, additional, Ševčíková, Hana, additional, Shchepin, Oleg, additional, Shirouzu, Takashi, additional, Shiryaev, Anton, additional, Siepe, Klaus, additional, Sir, Esteban B., additional, Sohrabi, Mohammad, additional, Soop, Karl, additional, Spirin, Viacheslav, additional, Spribille, Toby, additional, Stadler, Marc, additional, Stalpers, Joost, additional, Stenroos, Soili, additional, Suija, Ave, additional, Sunhede, Stellan, additional, Svantesson, Sten, additional, Svensson, Sigvard, additional, Svetasheva, Tatyana Yu., additional, Świerkosz, Krzysztof, additional, Tamm, Heidi, additional, Taskin, Hatira, additional, Taudière, Adrien, additional, Tedebrand, Jan-Olof, additional, Lahoz, Raúl Tena, additional, Temina, Marina, additional, Thell, Arne, additional, Thines, Marco, additional, Thor, Göran, additional, Thüs, Holger, additional, Tibell, Leif, additional, Tibell, Sanja, additional, Timdal, Einar, additional, Tkalčec, Zdenko, additional, Tønsberg, Tor, additional, Trichies, Gérard, additional, Triebel, Dagmar, additional, Tsurykau, Andrei, additional, Tulloss, Rodham E., additional, Tuovinen, Veera, additional, Sosa, Miguel Ulloa, additional, Urcelay, Carlos, additional, Valade, François, additional, Garza, Ricardo Valenzuela, additional, van den Boom, Pieter, additional, Van Vooren, Nicolas, additional, Vasco-Palacios, Aida M., additional, Vauras, Jukka, additional, Santos, Juan Manuel Velasco, additional, Vellinga, Else, additional, Verbeken, Annemieke, additional, Vetlesen, Per, additional, Vizzini, Alfredo, additional, Voglmayr, Hermann, additional, Volobuev, Sergey, additional, von Brackel, Wolfgang, additional, Voronina, Elena, additional, Walther, Grit, additional, Watling, Roy, additional, Weber, Evi, additional, Wedin, Mats, additional, Weholt, Øyvind, additional, Westberg, Martin, additional, Yurchenko, Eugene, additional, Zehnálek, Petr, additional, Zhang, Huang, additional, Zhurbenko, Mikhail P., additional, and Ekman, Stefan, additional

Published
2018
Full Text
View/download PDF

238. Fungal diversity notes 709–839: taxonomic and phylogenetic contributions to fungal taxa with an emphasis on fungi on Rosaceae

Author

Wanasinghe, Dhanushka N., primary, Phukhamsakda, Chayanard, additional, Hyde, Kevin D., additional, Jeewon, Rajesh, additional, Lee, Hyang Burm, additional, Gareth Jones, E. B., additional, Tibpromma, Saowaluck, additional, Tennakoon, Danushka S., additional, Dissanayake, Asha J., additional, Jayasiri, Subashini C., additional, Gafforov, Yusufjon, additional, Camporesi, Erio, additional, Bulgakov, Timur S., additional, Ekanayake, Anusha H., additional, Perera, Rekhani Hansika, additional, Samarakoon, Milan C., additional, Goonasekara, Ishani D., additional, Mapook, Ausana, additional, Li, Wen-Jing, additional, Senanayake, Indunil C., additional, Li, Junfu, additional, Norphanphoun, Chada, additional, Doilom, Mingkwan, additional, Bahkali, Ali H, additional, Xu, Jianchu, additional, Mortimer, Peter E., additional, Tibell, Leif, additional, Tibell, Sanja, additional, and Karunarathna, Samantha C., additional

Published
2018
Full Text
View/download PDF

239. Obligationens risker : En studie om kreditrisk, likviditetsrisk och ränterisk för företagsobligationer på den svenska marknaden

Author

Ekman, Melker and Tibell, Andreas

Subjects
obligationer, värdepapper, credit risk, obligation, finans, riskpremie, kreditspread, duration, liquidity risk, fond, ränterisk, yieldspread, bid-ask-spread, obligationens risker, riskvariabel, interest rate risk, kreditrisk, likviditetsrisk, företagsobligation, statsobligation, Business Administration, Företagsekonomi
Abstract

När en företagsobligation och en statsobligation har samma löptid och har en skillnad i avkastning, så kallas denna skillnad för kreditspread. Ett känt koncept inom finansvärlden är att risk har en stark koppling till avkastning. När emittenten av obligationen inte kan återbetala överenskommen utdelning eller principiellt lånebelopp så klassas detta som en betalningsinställelse. Eftersom det generellt sett är större risk för en betalningsinställelse för ett företag än för en stat, så vill investerare bli kompenserade för den extra risken de tar sig an. Den totala risken som utgör skillnaden i avkastning kan i sin tur delas upp i flera olika riskkomponenter. Syftet med vår uppsats är att undersöka ifall likviditetsrisk, ränterisk och kreditrisk har en effekt på kreditspread för företagsobligationer på den svenska marknaden. Med detta som bakgrund så har vi samlat in historiska data på förfallna obligationer under de senaste 10 åren via databaserna Thomson Reuter Datastream och Eikon. Vi har sedan laddat ned obligationsspecifika egenskaper i form av finansiella nyckeltal för samtliga obligationer. Dessa nyckeltal har valts för att till bästa förmåga representera och mäta respektive risk. Exempelvis så har vi använt oss av nyckeltalet “bid-ask-spread” för att mäta likviditetsrisk hos en obligation. För att undersöka sambandet mellan våra valda risker och kreditspread så genomförde vi ett hypotestest. Vi skapade en nollhypotes och en alternativhypotes som vi sedan testade med hjälp av en multipel regression. Nollhypotes (H0): Studiens utvalda variabler har inte en effekt på den kreditspread hos svenska företagsobligationer Alternativhypotes (Ha): Studiens utvalda variabler har en effekt på den kreditspread hos svenska företagsobligationer Slutsatsen var att vi kunde statistiskt påvisa ett positivt samband mellan riskernas storlek och storleken på obligationens kreditspread. Detta gjordes både för riskerna var för sig och för modellen när den blev testad i sin helhet. Den bakomliggande teorin bakom variablerna kunde därför antas vara korrekt även vid applicering på svenska marknaden för det senaste decenniet. Vi har som ambition att denna studie skall kunna agera som ett verktyg för fundamental analys för framtida investerare samt vidare studier inom området obligationer på svenska marknaden

Published
2019

240. The readiness is all : A survey of exercises for major accidents in a county in southern Sweden

Author

Kniif, Gustav and Tibell, Jessica

Subjects
samverkan, Medicin och hälsovetenskap, exercise, Communication, Omvårdnad, major accidents or disaster, Kommunikation, Nursing, cross-sectional study, cooperate, övning, Medical and Health Sciences, allvarlig händelse, tvärsnittsstudie
Abstract

Bakgrund. Denna magisteruppsats från specialistsjuksköterskeprogrammet i akutsjukvård är en pilotstudie som görs på uppdrag av Centrum för Interprofessionell Samverkan och sambruk inom Akut vård (CISA). Allvarlig händelse är en händelse där resurser behöver omfördelas, ledas och användas på ett särskilt sätt. Internationella erfarenheter visar att beredskap inför allvarlig händelse är ett förbättringsområde. Nationella erfarenheter pekar på kommunikation samt introduktion av nyanställda som områden för utveckling. Vid allvarlig händelse engageras flera olika verksamheter som måste samverka, något som tidigare erfarenheter och forskningsresultat har visat vara svårt. Övning kan förbereda personal i att hantera olika händelser, samt förbättra samverkan vid verklig händelse. Digital simuleringsövning bidrar med ett effektivt sätt att lära sig genom att utförandet sker i en säker miljö. Syftet med pilotstudien är att kartlägga genomförandet och upplevelsen av övningar inför allvarlig händelse inom larmkedjan i ett län i södra Sverige. Metod. Den valda designen var tvärsnittsstudie. Datainsamlingen utfördes genom en enkätundersökning. Urvalet skedde med hjälp av CISA:s styrgrupp genom bekvämlighetsurval. Totalt 108 respondenter svarade, av dessa exkluderades nio på grund ut av totalt eller partiellt (>30%) bortfall. Analys av deskriptiv och analytisk statistik skedde i SPSS version 25. En tematisk innehållsanalys utfördes på fritext svaren. Resultat/Slutsats. Deltagarna som arbetar inom larmkedjan övar i olika omfattning baserat på vilken verksamhet de tillhör samt om de har en ledningsroll eller ej. Verksamheterna samövar inför allvarlig händelse men tenderar att samöva prehospitalt alternativt intrahospitalt. En övervägande majoritet upplever att det övas för sällan. Övningarna upplevs generellt som meningsfulla av deltagarna. Realism, mängdträning samt tid till övning identifieras som förbättringsområden. Mer forskning behövs inom området. Förslagsvis med lika stora grupper av representanter från verksamheterna för att kunna dra säkrare slutsatser kring resultatet samt därmed gynna den enskilda patienten genom att öka samhällets beredskap inför allvarlig händelse. Background. This master thesis from the nurse specialist program in emergency care is a pilot study conducted on assignment of Center for interprofessional collaboration and artel within emergency care (CISA). Major accidents or disasters are events where resources need to be redistributed, lead, and used in a specific manner. International experience shows that preparedness for major accidents or disaster is an area in need of improvement. National experiences point out communication and introduction of new employees as areas of improvement. A major accident or disaster involves multiple functions, that within this extreme situation need to cooperate, something that past experiences have shown to be difficult. Exercise can prepare personnel in dealing with different situations, as well as improve cooperation in real events. Digital simulation exercises contribute as an effective way to learn in a safe environment. Aim of the study was to map how exercises for major accidents are implemented and experienced within the emergency response system in a county in southern Sweden. Method. The chosen design was a cross-sectional study. The data collection was conducted through a survey study. The sample was collected with the help of CISA’s control group through convenience sample. The study got a total of 108 participants, of these participants nine were excluded because of total or partial (>30%) non-completion. Analysis of descriptive and analytic statistics was carried out in SPSS v.25. A thematic content analysis was conducted on the free text answers. Results/Conclusion The participants that work within the emergency response system exercise to different extents based on which unit within the emergency response system they belong to as well as if they have a management role in case of a major accident or not. The units corporate for major accidents but tend to co-exercise either prehospitally or intrahospitally. A clear majority of the participants agree that they practise too rarely. The exercises are generally seen as meaningful by the participants. Realism, amount of training and time for practice are identified as areas of improvement. More research is needed within the area, as a suggestion with equal sized groups of representatives from the different units, to be able to draw more certain conclusions from the result and thereby favor the individual patient, by increasing the readiness for major accidents or disasters in society. Projekt Tabletop

Published
2019

241. Förekomst av läkemedel och antibiotika i avloppsvattnet på Skånes Universitetssjukhus (SUS) i Lund

Author

Björklund, Erland, Svahn, Ola, Askman, Peter, Tibell, Cecilia, Askman, Andreas, De Geer, Kristina, and Milenkovski, Susann

Subjects
Naturvetenskap, Natural Sciences
Abstract

Under våren 2017 togs prover på avloppsvatten från Skånes Universitetssjukhus (SUS) i Lund i samarbete mellan Region Skåne och Högskolan Kristianstad (HKR). Totalt analyserades fyraprovpunkter med avseende på förekomst av 23 läkemedel, antibiotika och andra mikroföroreningar. De fyra provpunkterna var 1. Pumpgrop för uppsamling, 2. Onkologen, 3. Infektion samt 4. Avlopp från Centralblocket. Resultaten redovisas baserat på olika behandlingsfunktion, vilketinnefattar grupperna J - Antiinfektiva medel för systemiskt bruk, C - Hjärta och Kretslopp, N -Nervsystemet, M - Rörelseapparaten samt övriga ämnen. Resultaten visar att vissa läkemedelsläpps ut från SUS i högre koncentration jämfört med utgående avloppsvatten från ettreningsverk (se rapporten ”Läkemedelsutsläpp från Skånska avloppsreningsverk 2017” nedan). Noterbara ämnen är ciprofloxacin, sulfamethoxazole och trimethoprim, samtligaantibiotika. Resultaten vi-sar också att olika avdelningar medicinerar sina patientgrupper olika och att avdelningarna därmed kan vara lokala punktkällor för vissa typer av antibiotika. Koncentrationen av läkemdelsrester i avloppsvattnet påverkas förstås också av den totala vattenanvändningen, som i sin tur är en konsekvens av antal anställda, antal patienter, antal toaletter och arbetsmetoder/vattenanvänd-ning per avloppsspunkt mm. De uppmätta halternavisar att det är önskvärt, i en uppföljande studie, att analysera och fastställa, företrädesvis för antibiotika, vilka andra preparat som används på SUS, och i vilken omfattning. Det är viktigt att poängtera att resultaten från denna undersökning kommer från ett provtagningstillfälle där provtagningen bestod av ett stickprov. En uppföljande studie behöver innehålla fler analystillfällen samt söka svar på om förekomsten av höga halter av antibiotika kan föranleda resistensutveckling i sjukhusens avloppssystem. Vidare behöver man undersöka vilka eventuella åtgärder som behöver vidtas, vid sjukhusen och/eller vid avloppsreningsverken, för att förhindra att höga halter av läkemedelsrester belastar vattenmiljön med dess djur och växtliv. Hänsyn måste då också tas inte bara till vilka ämnen som specifikt härrör från sjukhuset utan också i vilka mängder och i vilken omfattning de når reningsverket i aktiv form.

Published
2019

242. Visualizing macroevolutionary timescales : students’ comprehension of different temporal representations in an animation

Author

Lena Anna Elisabet Tibell and Jörgen Stenlund

Subjects
0106 biological sciences, Computer science, Evolution, lcsh:Evolution, Threshold concept, Medieteknik, 010603 evolutionary biology, 01 natural sciences, Education, Human Aspects of ICT, Human–computer interaction, lcsh:QH359-425, Learning, Media and Communication Technology, Deep time, Ecology, Evolution, Behavior and Systematics, Visualization, lcsh:LC8-6691, lcsh:Special aspects of education, 05 social sciences, GRASP, 050301 education, Timeline, Animation, Time perception, Lärande, Comprehension, Interval (music), Duration (music), 0503 education, Mänsklig interaktion med IKT
Abstract

Background Macroevolutionary time is a difficult idea to grasp and is considered to be a threshold concept in teaching and learning evolution. One way of addressing this subject is to use animations that represent evolutionary time. The aim of this descriptive and exploratory study was to investigate how various representations of time in an animation affect the way undergraduate students comprehend different temporal aspects of hominin evolution. Two factors, namely differences in timelines (the number of timelines with different scales) and the mode of the default animated time rate (either constant throughout the animation or decreasing as the animation progressed) were combined to give four different time representations. The temporal aspects were investigated using undergraduate students’ ability to find events at specific times, to comprehend relative order, to comprehend concurrent events, to estimate the duration of time intervals and their ability to compare the lengths of time intervals. Results The results revealed that “finding events at specific times” near to the end of the animation (closer to present time), where the sequence of events appeared very quickly, was more difficult for groups working with animations with only one timeline. We also found that the ability to comprehend concurrent events can be impaired if several timelines are displayed and the animation speed is relatively high. The ability to estimate the duration of a time interval was more difficult for groups working with animations with only one timeline, especially at the end of the animation where the sequence of events occurred quickly. Making correct comparisons of time intervals was relatively independent of which animation was used with one notable exception: groups working with an animation featuring several timelines and a decreasing default animated time rate performed worst at comparing events with intervals that spanned parts of the timeline with different scales. Conclusions Our results indicate that the choice of animation should depend on the teaching intention. However, a visualization with several timelines, and an animated time which slowed down toward present time, generated the best results for the majority of items tested. Temporal scale shift may interfere with the perception of time in cases where durations are compared.

Published
2019

247. Phylogeny of the subgenus Eumitria in Tanzania.

Author

Temu, Stella G., Clerc, Philippe, Tibell, Leif, Tibuhwa, Donatha D., and Tibell, Sanja

Subjects
PHYLOGENY, MOLECULAR phylogeny
Abstract

Several Usnea species in subgenus Eumitria (Parmeliaceae, lichenized Ascomycota) have been described from East Africa in the past decades. These have been based on morphology and chemistry data while molecular studies remain very limited. In this paper we are for the first time publishing phylogenetic analyses along with morphological and chemical data for Eumitria. ‬A total of 62 new sequences of Eumitria (26 ITS, 20 nuLSU, 6 MCM7, 10 RPB1) were generated in this study. nuLSU, MCM7 and RPB1 sequences are here for the first time reported for U. baileyi. A phylogeny of subgenus Eumitria from Tanzania based on Bayesian and maximum likelihood analyses of a concatenated four-loci data set is presented, confirming the monophyly of Eumitria. Further, secondary chemistry and variation in characters, such as the pigmentation of the central axis and branch shape were investigated. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
View/download PDF

250. Safety of xenografts

Author

Tibell, Annika, Heneine, Walid, Folks, Thomas, Chapman, Louisa, and Groth, Carl

Published
1998

Catalog

Books, media, physical & digital resources
See catalog results