1,819 research outputs found
Catenula turgida (Zacharias, 1902) Larsson, Ahmadzadeh & Jondelius 2008
No full textCatenula turgida (Zacharias, 1902) Larsson, Ahmadzadeh & Jondelius, 2008 (Fig. 5 H, L, 6 B) Localities. Loc. 1, 4, 8, 10, 28 Known distribution. Europe (Luther 1960), Brazil (Marcus 1945 b). Material. Several individuals studied alive. Description and remarks. This taxon is very characteristic with its special habitus, in comparison with other catenulids, and is therefore easily recognised. The general appearance and anatomy of our specimens is identical to that of Suomina turgida (see Luther 1960). Recently S. turgida was transferred to Catenula (Larsson et al. 2008.).Published as part of Larsson, Karolina & Willems, Wim, 2010, Report on freshwater Catenulida (Platyhelminthes) from Sweden with the description of four new species, pp. 1-18 in Zootaxa 2396 on pages 10-12, DOI: 10.5281/zenodo.19396
Evaluation of the Dual-Modal usage of contrast agents by means of Synchrotron X-ray Computed Microtomography and Magnetic Resonance Imaging using Macrophages loaded with Barium Sulfate and Gadolinium Nanoparticles for Detection and Monitoring in Animal Disease Models
No full text¨This thesis focuses on evaluating the dual-modal Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) capabilities of contrast agents. For such purposes a gadolinium based contrast agent is of high interest, due to its paramagnetic properties, which while present inside a magnetic field will hence interact with the protons spins of water (in tissue and fat) and shorten their the T1 relaxation time, thereby creating a positive image contrast in MRI. Furthermore, the X-ray Mass Attenuation Coefficient (MAC) of gadolinium is relatively high, thus suggesting its potential use, also as a CT contrast agent. Gadolinium nanoparticles (GdNPs) can be loaded into cells, such as macrophages, which offers the possibility to track cells inside entire organisms. In the first step the uptake of GdNPs inside cells was investigated, together with a test for toxicity. To show the potential of using GdNP loaded macrophages for functional imaging of inflammation, an acute allergic airway inflammation mouse model (mimicking asthma in humans) was used and analyzed by in-situ synchrotron phase contrast CT. In the first step this approach was evaluated using macrophages loaded with a clinical contrast agent containing barium sulphate (BaSO4), since this agent is known to provide high contrast in CT. In the ultimate step a combination of both BaSO4 and GdNP loaded macrophages was used in the same asthmatic mouse model and analyzed by dual modal Synchrotron phase contrast CT and Micro Magnetic Resonance Imaging (μ-MRI). Complementary results in terms of the biodistribution of injected macrophages could only be obtained by the combination of both synchrotron phase contrast CT and μ-MRI, where the first modality allows a detailed localization of clustered BaSO4 loaded macrophages, but fails to detect single macrophages, which could instead be indirectly observed by μ-MRI as an increase of the T1-contrast, coming from the soft tissue of mice injected with GdNP loaded macrophages
Catenula macrura Marcus 1945
No full text<i>Catenula macrura</i> Marcus, 1945 b <p>(Fig. 5 J, 6 C)</p> <p> <b>Locality.</b> Loc. 12.</p> <p> <b>Known distribution.</b> Brazil (Marcus 1945b), Finland (Luther 1960).</p> <p> <b>Material.</b> Two individuals studied alive and preserved in ethanol for DNA-sequencing.</p> <p> <b>Description and remarks.</b> This species, which is superficially similar to <i>C. lemnae</i>, is easily recognisable by the presence of a very narrow tail-like posterior end (see Marcus 1945b, Luther 1960).</p>Published as part of <i>Larsson, Karolina & Willems, Wim, 2010, Report on freshwater Catenulida (Platyhelminthes) from Sweden with the description of four new species, pp. 1-18 in Zootaxa 2396</i> on page 10, DOI: <a href="http://zenodo.org/record/193965">10.5281/zenodo.193965</a>
A Surface Phase Model of the Alveolar Lining: Ultrastructural Analysis and in vivo Applications
No full textIn this thesis the relation between lung surfactant structure and functional properties have been studied. Experimental results show that the alveolar surface is formed by a coherent surface phase with a structure equal to tubular myelin. The properties of this phase may explain certain unresolved issues in lung physiology, e.g., mechanical stability of surfactant during the breathing cycle, the question of free water in the alveolus, and uptake kinetics of pulmonary administered drugs. A surface phase has important consequences in general for the barrier function of the lung, and for host defense. This surface phase is modeled with a biomathematical approach and is proposed to have a bilayer structure of a minimal surface type, the so-called CLP surface. This structure corresponds to a surfactant bilayer without self-intersections. The functional and structural properties of the CLP surface may explain e.g., the ultra low surface energy of surfactant in vivo, and rapid deformability of the surface phase during breathing. The role of cholesterol in lung surfactant was studied by X-ray diffraction. It was shown that the presence of cholesterol lowers the crystallization temperature of the surfactant significantly. During work with a pharmacy-grade lung surfactant, a novel dynamic swelling behavior was observed. During swelling in electrolyte containing water solutions, a dramatic increase of the air-water surface area was seen. In vivo evaluation of this process in an ARDS model was performed, showing significantly higher arterial oxygen levels in rats treated with surfactant in dynamic swelling compared to normal surfactant therapy
Stenostomum handoelense Larsson & Willems, 2010, n. sp.
No full textStenostomum handoelense n. sp. (Fig. 3 C–E) Synonyms: Stenostomum longpit (Larsson et al. 2008.) Localities. Loc. 23 (type locality) and 7. Material. Several individuals studied. Photograph (fig. 3 D) designated holotype (SMNH no. 7369). There are DNA-sequences (accession numbers: FJ 384823, FJ 384864, FJ 384951, FJ 384905, FJ 384824, FJ 384865, FJ 384952, FJ 384906, FJ 384815, FJ 384857, FJ 384945, FJ 384816, FJ 384858, FJ 384946), which will facilitate unambiguous identification (see Larsson et al. 2008). Etymology. Species name refers to the type locality Handöl, Jämtland. Remark. This species is clearly identifiable based on morphological characters, photos and drawings of live specimens. Description. The animals are 0.4 mm long. Specimens with one or two zooids were found. The colour is white in reflected light and the gut is darker with excretophores evenly distributed along both sides of the gut. The excretophores are white in reflected light and black in transmitted light. The body is slender, evenly shaped and cylindrical with both ends tapering. The anterior part of the body is long and more mobile than the rest of the body creating a head-like appearance (see fig. 3 D, prostomium in Luther 1960). The epidermis is completely covered with short cilia. Rhabdoids could not be observed. The deep ciliated pits are long, extending from the anterior tip to approximately 1 / 8 of the body length. The brain consists of two pairs of brain lobes; the anterior lobes are more distinct and consist of 10–12 metamerically arranged ganglia, giving a striped appearance to the prostomium. Refractile organs are absent. The mouth opening is more or less U-shaped and situated at approximately 1 / 6. The pharynx is muscular and slightly wrinkled and the distal rim is constricted around the small mouth opening. The length of the pharynx is approximately 1 / 5 of the total body length. A pair of glands is present along the pharynx. The gland bodies are situated close to the proximal end of the pharynx, but their long and slender necks open close to the mouth. The protonephridium is slightly sinuous and visible in live specimens and ends in a nephridiopore at the posterior end. Individuals with a developed genital system were not found. Diagnosis. Stenostomum handoelense n. sp.: species of Stenostomum with one or two zooids, a prostomium, long ciliated pits ranging from the anterior tip to approximately 1 / 8, anterior brain lobes with 10–12 “metamerical” compartments, a barrel-like pharynx with a small mouth opening, two club-shaped pharynx glands and excretophores. Refractile organs absent. Discussion. S. handoelense can easily be placed within the taxon Stenostomum. A remarkable feature of this species is the long and mobile anterior end. This so-called prostomium has a striped appearance due to the “metamerically” arranged anterior brain lobes. A similar feature is also present in Stenostomum anatirostrum Marcus, 1945, Stenostomum glandulosum Kepner & Carter, 1931 and Stenostomum bryophilum Luther, 1960. In S. anatirostrum the prostomium is spatulate or sharply arched, constricted proximally, separating it from the pharynx (Noreña et al. 2005). In S. bryophilum a large number of pharynx glands are present, clustered around the pharynx (Luther 1960). Furthermore the brain of this species has a lower number of “metamerical” brain compartments (4–6 in Luther 1960), although in one of Luther’s figures, 10 metamerical brain compartments are depicted (Luther 1960: Fig. 9 F). S. glandulosum, the third species showing a prostomium similar to that of S. handoelense, is clearly identifiable by the presence of three pairs of refractile organs and epidermal inclusions (= rosette-shaped glands in Kepner & Carter 1931) In the molecular analyses of Swedish Catenulida (Larsson et al. 2008.) S. handoelense forms a clade with Stenostomum heebuktense n. sp. and Stenostomum steveoi n. sp. (see fig. 2). This clade is always strongly supported, although no morphological synapomorphy could be found.Published as part of Larsson, Karolina & Willems, Wim, 2010, Report on freshwater Catenulida (Platyhelminthes) from Sweden with the description of four new species, pp. 1-18 in Zootaxa 2396 on pages 6-7, DOI: 10.5281/zenodo.19396
sj-xlsx-1-asp-10.1177_00037028211060866 – Supplemental Material for Quantitative Hydrogen Chloride Detection in Combustion Environments Using Tunable Diode Laser Absorption Spectroscopy with Comprehensive Investigation of Hot Water Interference
No full textSupplemental Material, sj-xlsx-1-asp-10.1177_00037028211060866 for Quantitative Hydrogen Chloride Detection in Combustion Environments Using Tunable Diode Laser Absorption Spectroscopy with Comprehensive Investigation of Hot Water Interference by Wubin Weng, Jim Larsson, Joakim Bood, Marcus Aldén, and Zhongshan Li in Applied Spectroscopy</p
In vivo determination of local skin optical properties and photon path length by use of spatially resolved diffuse reflectance with applications in laser Doppler flowmetry Larsson, M., Nilsson, H. & Strömberg, T. N.B.: When citing this work, cite the original article. Larsson, M., Nilsson, H. & Strömberg, T., In vivo determination of local skin optical properties and photon path length by use of spatially resolved diffuse reflectance with applications in laser Doppler flowmetry, 2003, Applied Optics, (42), 7-8, 124-134
Polish Photographer Jan Malisz about Carl Larsson
No full textIn 1912 the Warsaw newspaper “The Illustrated Weekly” published an article about the Swedish painter Carl Larsson (1853–1919). The author of this text was a Polish Photographer, polyglot and art connoisseur Jan Malisz (1878–1928), who initiated the professional movement of photographers in Galicia. In 1908, he founded a branch of the Austrian Union of Photographers in Cracow, and in 1909, in Lviv. His artistic horizons also encompassed Scandinavian art, one of whose representatives was Carl Larsson. Malisz noticed in his paintings certain features which, after many years, have let Larsson and his wife Karin be recognised in Europe as the precursors of Swedish model manufacture and interior design. The phenomenon of the accuracy of Malisz’s remark results from the fact that he was Larsson’s friend for many years. The spiritual understanding between the Swede and the Pole was neither impeded by a significant age difference nor by their different political views, as Malisz was a socialist, whereas Larsson supported absolutism. The letters from Malisz to Larsson are kept in the University Library in Uppsala.W 1912 roku warszawski „Tygodnik Ilustrowany” zamieścił tekst o szwedzkim malarzu Carlu Larssonie (1853–1919). Autorem był polski fotografik, poliglota i znawca sztuki Jan Malisz, żyjący w latach 1878–1928 inicjator ruchu zawodowego fotografów na terenie Galicji. W roku 1908 założył on filię ogólnoaustriackiego Związku Fotografów w Krakowie, a w 1909 we Lwowie. Jego horyzont artystyczny objął także sztukę skandynawską, której przedstawicielem był malarz Carl Larsson. Malisz dostrzegł w dziełach szwedzkiego malarza cechy, które po latach pozwoliły Europie uznać C. Larssona i jego żonę Karin za prekursorów szwedzkiego wzornictwa i designu wnętrz. Fenomen trafności spostrzeżeń J. Malisza wynikał z bliskiej i długoletniej przyjaźni z Carlem Larssonem. W porozumieniu duchowym Szweda z Polakiem nie przeszkodziła znaczna różnica wieku ani różne poglądy polityczne. Malisz był socjalistą, a Larsson zwolennikiem absolutyzmu. Listy J. Malisza do C. Larssona przechowywane są w Bibliotece Uniwersyteckiej w Uppsali
An analysis of the life, work, and social change created by author Stieg Larsson
No full textThe purpose of this thesis is to examine the life of Swedish author Stieg Larsson and how his career as a journalist and activist lead him to create the global phenomenon, The Millennium Trilogy. Through writing about international political themes, Larsson successfully tells a tale of a female heroine, Lisbeth Salander, who overcomes her tragic destiny. Originally written in Swedish, Larsson creates a cultural assimilation through writing about universal themes, such as computer hacking and crimes against humanity. The three novels, The Girl with the Dragon Tattoo, The Girl Who Played with Fire, and The Girl Who Kicked the Hornet’s Nest are together called the Millennium Trilogy, and after only 6 years of publication, sold more than 65 million copies in more than 44 different languages. The novels are additionally the first major block buster books about social networking. Unfortunately, Larsson never saw the success of his novels, having died before their publication. This thesis will search for the truth behind the fiction by using current events that reflect the issues he proposes. It will also explore the idea of writing as a medium for social change by enlightening readers through journalism and literature. Through discussing the international success of the novels, this thesis aims to show the power of universal themes in transcending cultural barriers to create awareness of global issues. The books have not only become a symbol of pop culture, but also a symbol for social justice. The Millennium Trilogy is a series of crime novels that are a delivery system for social activism in the 21st century that incorporates contemporary technology as well as traditional “who dun it” story lines
Catenula evelinae Larsson, Ahmadzadeh & Jondelius 2008
No full textCatenula evelinae (Marcus, 1945) Larsson, Ahmadzadeh & Jondelius, 2008 Figures 2, 3 General morphology. The body, with length varying between 0.6 and 0.8 mm, is elongate with truncated ante- rior tip and rounded posterior tip. The anterior region has long-ciliated sensorial cells and a statocyst with a statolith in the prostomium base (Figs 2, 3). In addition, there is a pre-oral swelling with ciliated furrows and occurrence of conspicuous epidermal inclusions. The intestine is located in the posterior 2/3 of the body. A protonephridium duct is visible in the posterior 1/6 of the body and the nephridiopore is subterminal (Fig. 3). Specimens examined. MZU 00203: coll. J.A.L. Braccini and F. Brusa, 26 March 2012, Brazil, Rio Grande do Sul, Tramandaí (30°05ʹ09ʺ S, 050°10ʹ24ʺ W); coll. J.A.L. Braccini and F. Brusa, 26 March 2012, Brazil, Rio Grande do Sul, Capivari do Sul (30°10ʹ22ʺ S, 050°23ʹ10ʺ W). Remarks on ecology and distribution. Species with low abundance in each wetland in the summer/autumn survey and absent from the winter/spring survey (Table 2). Catenula evelinae was previously reported only for its type locality, in the city of São Paulo, in southeast Brazil (Marcus 1945a). Thus, the present record represents a southeastern range extension of about 800 km. the Coastal Plain during 2 surveys done in 2012. tips; pre-oral region longer than wide. There is a statocyst located approximately in the middle of the cephalic lobe; a ciliated pit is absent. The intestine is large, 2/3 of the body length (Figs 4, 5). Specimens examined. MZU 00204: coll. J.A.L. Braccini and F. Brusa, 12 March 2012, Brazil, Rio Grande do Sul, Osório (Wetland 3) (29°52ʹ02ʺ S, 050°05ʹ24ʺ W). Remarks on ecology and distribution: Species with moderate abundance in the summer/autumn survey, but absent in the winter/spring survey (Table 2). Similarly to C. evelinae, C. leuca was previously recorded only in its type locality, in the city of São Paulo (Marcus 1945a). The present record, thereby, increases its known distribution about 800 km to the southeast. Catenula turgida (Zacharias, 1902) Larsson, Ahmadzadeh & Jondelius, 2008 Figures 6, 7 General morphology. Body length (0.4–0.6 mm) similar to those from the Holarctic region; mean length a little shorter than that of São Paulo specimens (0.6–0.8 mm). Their main morphological characteristics are: absence of statocysts, body length 5 or 6 times longer than wide, preoral ring with 4 longitudinal grooves on each side (Figs 6, 7) and 3–4 µm long rhabdoids. Specimens examined. MZU 00205: coll. J.A.L. Braccini and F. Brusa, 12 March 2012, Brazil, Rio Grande do Sul, Tramandaí (30°05ʹ09ʺ S, 050°10ʹ24ʺ W). Remarks on ecology and distribution. This species had low abundance in both surveys (Table 2). It was described from the Holarctic region (Zacharias 1902, Larsson and Willems 2010) and previously reported for the Neotropical region in the city of São Paulo, in southeast Brazil (Marcus 1945a, b). The present record represents an extension of its known distribution about 800 km to the southeast.Published as part of João A. L. Braccini, Francisco Brusa & Ana M. Leal-Zanchet, 2017, Six freshwater microturbellarian species (Platyhelminthes) in permanent wetlands of the Coastal Plain of southern Brazil: new records, abundance, and distribution, pp. 849-855 in Check List 13 (6) on pages 851-852, DOI: 10.15560/13.6.849, http://zenodo.org/record/106794
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