bluuebunny/crossref_metadata_2025_split huggingface dataset:
Distribution of NTS3 receptor/sortilin mRNA and protein in the rat central nervous system
Authors: Sarret Philippe , Krzywkowski Pascale , Segal Laura , Nielsen Morten S. , Petersen Claus M. , Mazella Jean , Stroh Thomas , Beaudet Alain 
Published: May 2003

AbstractThe neurotensin (NT) receptor, NTS3, originally identified as the intracellular sorting protein sortilin, is a member of a recently discovered family of receptors characterized by a single transmembrane domain. The present study provides the first comprehensive description of the distribution of NTS3/sortilin mRNA and protein in adult rat brain using in situ hybridization and immunocytochemistry. Both NTS3/sortilin mRNA and immunoreactivity displayed a widespread distribution throughout the brain. High levels of NTS3/sortilin expression and immunoreactivity were found in neuronal cell bodies and dendrites of allocortical areas such as the piriform cortex and hippocampus. Regions expressing both high levels of NTS3/sortilin mRNA and protein also included several neocortical areas, the islands of Calleja, medial and lateral septal nuclei, amygdaloid nuclei, thalamic nuclei, the supraoptic nucleus, the substantia nigra, and the Purkinje cell layer of the cerebellar cortex. In the brainstem, all cranial nerve motor nuclei were strongly labeled. NTS3/sortilin mRNA and immunoreactivity were also detected over oligodendrocytes in major fiber tracts. Subcellularly, NTS3/sortilin was predominantly concentrated over intracytoplasmic membrane‐bound organelles. Many of the areas exhibiting high levels of NTS3/sortilin (e.g., olfactory cortex, medial septum, and periaqueductal gray) have been documented to contain high concentrations of NT nerve cell bodies and axons, supporting the concept that NTS3/sortilin may play a role in NT sorting and/or signaling. Other areas (e.g., hippocampal CA fields, cerebellar cortex, and cranial nerve motor nuclei), however, are NT‐negative, suggesting that NTS3/sortilin also exerts functions unrelated to NT signaling. J. Comp. Neurol. 461:483–505, 2003. © 2003 Wiley‐Liss, Inc.
Immunohistochemical distribution of NTS2 neurotensin receptors in the rat central nervous system
Authors: Sarret Philippe , Perron Amélie , Stroh Thomas , Beaudet Alain 
Published: May 2003

AbstractIn the present study, we localized the levocabastine‐sensitive neurotensin receptor (NTS2) protein in adult rat brain by using an N‐terminally‐directed antibody. NTS2‐like immunoreactivity was broadly distributed throughout the rat brain. At the cellular level, the reaction product was exclusively associated with neurons and predominantly, although not exclusively, with their dendritic arbors. No NTS2 signal was observed over astrocytes, as confirmed by dual confocal microscopic immunofluorescence studies using the astrocytic marker S100β. High densities of NTS2‐like immunoreactive nerve cell bodies and/or processes were detected in many regions documented to receive a dense neurotensinergic innervation, such as the olfactory bulb, bed nucleus of the stria terminalis, magnocellular preoptic nucleus, amygdaloid complex, anterodorsal thalamic nucleus, substantia nigra, ventral tegmental area, and several brainstem nuclei. Most conspicuous among the latter were structures implicated in the descending control of nociceptive inputs (e.g., the periaqueductal gray, dorsal raphe, gigantocellular reticular nucleus, pars alpha, lateral paragigantocellular, and raphe magnus), in keeping with the postulated role of NTS2 receptors in the mediation of neurotensin's supraspinal antinociceptive actions. However, the distribution of NTS2‐like immunoreactivity largely exceeded that of neurotensin terminal fields, and some of the highest concentrations of the receptor were found in areas devoid of neurotensinergic inputs such as the cerebral cortex, the hippocampus, and the cerebellum, suggesting that neurotensin may not be the exclusive endogenous ligand for this receptor subtype. J. Comp. Neurol. 461:520–538, 2003. © 2003 Wiley‐Liss, Inc.
Einnischung der seltenen Steppenrasenart Astragalus exscapus L. (Stengelloser Tragant) im Kyffhäusergebirge (Thüringen, Deutschland)
Authors: Becker T. , Voß N. 
Published: May 2003

AbstractDie Einnischung der seltenen Steppenrasenart Astragalus exscapus L. im Kyffhäusergebirge wurde untersucht. Astragalus exscapus kommt hier in mehreren Assoziationen der Ordnung Festucetalia valesiacae sowie in Xerobromion‐Beständen vor. Die Art besiedelt damit eine weite Spanne verschiedener Xerothermrasen, die von extrem trockenen Felsfluren bis hin zu mesophilen Halbtrockenrasen reicht. Lediglich in einer Felsflur auf saurem Substrat wurde A. exscapus nicht festgestellt. A. exscapus erreicht in den Felsfluren deutlich geringere Stetigkeit als in den Halbtrockenrasen. Lineare Regressionen zeigen, dass die Stetigkeit von A. exscapus mit zunehmend mesotrophen Standortbedingungen eng korreliert. Andere Standortparameter erbrachten keinen Zusammenhang mit der Stetigkeit der Art. Die Untersuchungen zeigen, dass die Seltenheit von A. exscapus innerhalb der Xerothermrasen des Kyffhäusers nicht durch eine enge standörtliche Amplitude begründet ist. In Verbindung mit einer geringen Ausbreitungskraft der Art schließen wir, dass vegetationsgeschichtliche Gründe für die punktuelle Verbreitung der Art verantwortlich sind. A. exscapus hat die postglaziale Bewaldungsphase nur an wenigen Standorten überdauert, die aufgrund von Trockenheit keinen geschlossenen Waldwuchs zuließen. Seit Beginn der anthropogenen Landnutzung und der damit verbundenen Ausweitung der Xerothermrasen konnte sich die Art wegen ihrer geringen Ausbreitungskraft kaum wieder ausbreiten. Neugründungen und Wiederansiedlungen von Populationen von A. exscapus als Managementmaßnahme sind vermutlich in vielen Xerothermrasen des Mitteldeutschen Trockengebietes möglich.
Neue Untersuchungen an GeinitziaEndl. 1847 aus den Aachener Schichten von Belgien und Deutschland (Oberes Santon, Oberkreide)
Authors: Kunzmann L. , Knoll H. , Gaipl R. 
Published: May 2003

AbstractAus den Aachener Schichten (Oberes Santon, Oberkreide) von Belgien und Deutschland werden fertile und sterile Organe von zwei Geinitzia‐Arten beschrieben. Für die als Carpolithes abietinus Schlotheim 1820 (nom. inval.) seit langem bekannten Fossilreste wird die neue Art Geinitzia schlotheimii Kunzmann, Knoll & Gaipl sp. nova aufgestellt. Mit Geinitzia formosa Heer 1871 kommt eine weitere, aus dem Santon Mitteleuropas bekannte Art vor. Das neue Fossilmaterial unterstützt die von Kunzmann (1999) vorgelegte Auffassung über die Koniferengattung Geinitzia Endl. 1847.
Rhodomyrtophyllum reticulosum (Rossm.) Knobloch & Z. Kvaček – ein bedeutendes eozänes Florenelement im Tertiär Mitteleuropas
Authors: Glinka U. , Walther H. 
Published: May 2003

AbstractNach kritischer Überprüfung blattepidermaler und blattmorphologischer Merkmalskomplexe an Blättern und Blattresten von Rhodomyrtophyllum Rüffle & Jähnichen aus dem Weißelster‐Becken und seiner Randgebiete in Mitteldeutschland (Raum Halle–Leipzig–Borna–Altenburg–Zeitz–Zwickau und Ostthüringen) wird nachgewiesen, dass es sich bei den Blattresten um Vertreter einer einzigen Art handelt. Die Untersuchungen stützen sich auf 465 Fossilien aus meist kohlig‐ oder tonig‐schluffiger Facies. In einer erweiterten Diagnose wird neben Grundformen mit typischen Charakteristiken die morphologische und blattanatomische Variationsbreite angeführt, die in den natürlichen Grenzen einer Species liegt. Untersuchungen an Blättern weiterer Fundorte in Europa kommen zum gleichen Ergebnis. An Arten von 21 Gattungen rezenter Myrtaceae erfolgen detaillierte Untersuchungen der Blattmorphologie und vor allem der Epidermisstruktur, die markante Ähnlichkeiten zur fossilen Sippe zeigen, was besonders bei Arten der Gattungen Syzygium Gaertn. und Eugenia L. erkennbar ist.
Development of the anther in Nepenthes khasianaHook.f. (Nepenthaceae), an endemic and endangered insectivorous plant of North East India
Authors: Venugopal N. , Rashi Devi N. 
Published: May 2003

AbstractNepenthes khasiana Hook.f. is a dioecious insectivorous (carnivorous) plant. The anthers were observed with the SEM. The filaments are connate to form an androphore; the anther heads are sessile in the bud, but as the flower opens the androphore elongates and the bisporangiate anthers are held above the tepals. The archesporial initials comprise of uniseriate rows of cells, the anther wall consists of a very thick endothecium and thin epidermis and the tapetum has a dual in origin, of secretory type. Cytokinesis of microspore mother cell is simultaneous type within a distinct callose wall even after tetrads are formed. Pollen grains are dispersed in tetrads with a sparsely echinate sculpture.
Die Gesellschaften der Bidentetea tripartitae Tx. et al. ex von Rochow 1951 in Mecklenburg‐Vorpommern mit Anmerkungen zur Synsystematik und Nomenklatur der Klasse
Authors: Kiesslich M. , Dengler J. , Berg C. 
Published: May 2003

AbstractDie Klasse Bidentetea tripartitae ist in Mecklenburg‐Vorpommern mit zwei Verbänden und insgesamt acht Assoziationen vertreten, die durch Vegetationsaufnahmen belegt und floristisch‐ökologisch charakterisiert werden. Der Zentralverband Bidention tripartitae mit dem Polygonetum hydropiperis, dem Corrigiolo litoralis‐Bidentetum radiatae, dem Rumici maritimi‐Ranunculetum scelerati, dem Alopecuretum aequalis und dem Bidentetum cernuae kommt meist in stehenden Gewässern wie wasserführenden Ackerhohlformen, Fisch‐ oder Absetzteichen vor. Das durch zahlreiche Verbandskennarten charakterisierte Chenopodion rubri mit den Assoziationen Chenopodietum rubri, Xanthio albini‐Chenopodietum rubri und Chenopodio polyspermi‐Corrigioletum litoralis ist dagegen weitgehend auf das Elbufer beschränkt; nur seine erste Assoziation tritt (fragmentarisch) auch in anderen Regionen auf.Der Abgleich mit der vegetationskundlichen Datenbank des Landes (Berg et al. 2001b) zeigt, dass manche in der Literatur als Kennarten der Bidentetea geführte Arten wie Bidens tripartita oder Persicaria hydropiper das Kennartkriterium regional nicht erfüllen, während andererseits Oenanthe aquatica im Gebiet als Klassencharakterart gelten kann. Die Syntaxonomie der Gesellschaften wird auf der Basis des Klassifikationsverfahrens von Dengler & Berg (2002) und vor dem Hintergrund eines umfassenden Literaturvergleichs diskutiert. Für alle behandelten Syntaxa sind die gültigen Namen nach ICPN sowie die wichtigsten Synonyme angeführt, gegebenenfalls mit Angabe der Gründe für deren Invalidität oder Illegitimität. Nomenklatorische Probleme werden erforderlichenfalls erörtert. Für sieben Syntaxa, die bislang nicht typisiert waren, werden nomenklatorische Typen publiziert; ferner vier Namen dem CNC als Nomina ambigua zur Verwerfung vorgeschlagen. Ergänzend wird auf weitere, möglicherweise Assoziationsrang genießende, im Untersuchungsgebiet aber fehlende Syntaxa der Klasse hingewiesen.Bei den Artenspektren (soziologische Gruppen, Lebensformen, Strategietypen) unterscheiden sich die beiden Verbände deutlich. So ist der Anteil der Therophyten im Chenopodion rubri, jener der Hydrophyten dagegen im Bidention tripartitae deutlich höher. Abschließend wird die Phytodiversität, die Bestandsentwicklung im Zuge von Landnutzungsänderungen und die Naturschutzrelevanz der Bidentetea‐Gesellschaften diskutiert.
Heat transfer performance of a flexible looped heat pipe using R134a as a working fluid: Proposal for a method to predict the maximum heat transfer rate of FLHP
Authors: Kobayashi Takashi , Ogushi Tetsurou , Haga Seiji , Ozaki Eiichi , Fujii Masao 
Published: May 2003

AbstractThis paper presents the heat transfer performance of a Flexible Looped Heat Pipe (FLHP) using R134a as a working fluid. In our evaluation system, an evaporator and a condenser are connected by long flexible tubes with a diameter of 3 mm, and the total piping length of this looped heat pipe system is approximately 7500 mm. We selected porous Teflon with an effective pore diameter of 2rcw = 1.2 µm to overcome high gravitational heads. Elevation of the evaporator above the condenser ΔH = He − Hc) was changed in three conditions [$\def\circle#1{{\ooalign{\hfil\raise.07ex\hbox{#1}\hfil\crcr\mathhexbox20D}}} \circle{1}$ Top heat mode (ΔH = +1 m), $\def\circle#1{{\ooalign{\hfil\raise.07ex\hbox{#1}\hfil\crcr\mathhexbox20D}}} \circle{2}$ Horizontal mode (ΔH = 0), $\def\circle#1{{\ooalign{\hfil\raise.07ex\hbox{#1}\hfil\crcr\mathhexbox20D}}} \circle{3}$ Bottom heat mode (ΔH = −1 m)] considering the terrestrial application and the influence of gravity on the FLHP performance was investigated. FLHP provided high thermal transport capacities over long distances through small cross‐sectional flexible tubes compared with conventional heat pipes. We also proposed an analysis method to predict the maximum heat transfer rate of FLHP. © 2003 Wiley Periodicals, Inc. Heat Trans Asian Res, 32(4): 306–318, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/htj.10093
A numerical study of natural convection in a vertical cylinder bundle
Authors: Isahai Yuji , Hattori Naozo 
Published: May 2003

AbstractNatural convection in a bundle of vertical cylinders, arranged in equilateral triangular spacing, has been investigated numerically using a boundary‐fitted coordinate system. Numerical calculations for center‐to‐center distance between cylinders S/D = 1.1 to 1.9, 3.0, 4.0, and 7.0 were made of natural convection of air at modified Grashof numbers Gr* from 10 to 108. Local Nusselt number Nu for uniform wall heat flux indicates the same value at the axial locations except for the thermal entrance region. The region for respective cylinder spacing is noted to diminish with decreasing Grashof number. Numerical values of local Nusselt number Nui are in relatively good agreement with those obtained from the experiment for air. © 2003 Wiley Periodicals, Inc. Heat Trans Asian Res, 32(4): 330–341, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/htj.10095
Enhancement of heat transfer in a turbulent channel flow with insertion of a flat body
Authors: Sano Masatoshi 
Published: May 2003

AbstractExperiments have been performed for turbulent channel flow obstructed with a flat body. The local heat transfer coefficient and the wall static pressure were measured on two kinds of flat bodies for which the trailing edge shape differed. The length of the body, the thickness of the body, and the distance between the wall and the body were changed in several steps. The total performance between heat transfer and pressure drop was estimated under conditions of equal pumping power. The total performance hardly changed, even if the trailing edge shape and length of the bodies were different. The averaged heat transfer coefficient increased with increasing thickness of the bodies. However, as the friction factor increased, the performance became worse. When a comparatively thin body was installed near the heating surface, good performance was obtained. © 2003 Wiley Periodicals, Inc. Heat Trans Asian Res, 32(4): 354–366, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/htj.10100
Heat and mass transfer in a reforming catalyst bed: Analytical prediction of distributions in the catalyst bed
Authors: Usami Yutaka , Fukusako Shoichiro , Yamada Masahiko 
Published: May 2003

AbstractHeat and mass transfer characteristics within a reforming catalyst bed have been analytically investigated. A numerical analysis was carried out in a two‐dimensional steady‐state model of a reforming catalyst bed. The reforming tube was filled with catalyst and the tube wall was uniformly heated; a mixture of steam and methane was reformed through the catalyst bed. The predicted distributions of temperature, formed gas composition, methane conversion rate, and heat transfer coefficient in the catalyst bed are in good agreement with the experimental data. The effects of space velocity, steam carbon molar ratio, and wall temperature on the heat transfer coefficient were analytically presented. From temperature and composition distributions simulated by the two‐dimensional analysis, the effects of the above‐mentioned factors and diffusion on both heat and mass transport phenomena were qualitatively predicted. © 2003 Wiley Periodicals, Inc. Heat Trans Asian Res, 32(4): 367–380, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/htj.10101
Riparian Trees and Flow Paths between the Hyporheic Zone and Groundwater in the Oberer Seebach, Austria
Authors: Wagner Franz Helmut , Bretschko Gernot 
Published: May 2003

AbstractWe investigated lateral subsurface water exchange in a 2nd order mountain stream with a piezometer method. At both banks the stream hyporheic zone lost water to the riparian groundwater zone. Independently, the hydraulic heads at three sites in the streambed and in the riparian zone exhibited periodic, diurnal fluctuations. We attributed them to water consumption by the riparian trees, as solar radiation explained part of this additional variation.Our results demonstrate that subsurface water exchanges take place between the hyporheic zone and lateral riparian groundwater in spatially defined small‐scale flow paths. These small‐scale interactions occur within the context of large‐scale patterns of loss and gain of channel water.
Light‐Trapping of Caddisflies at the Thaya (Lower Austria), a River Influenced by Pulsating Hypolimnetic Water Release
Authors: Waringer Johann A. 
Published: May 2003

AbstractAdult Trichoptera were caught from September 1999 to September 2000 at the Thaya River at Hardegg, Lower Austria, using a Jermy‐type light trap. From a total of 11,711 specimens caught, the most abundant species were Psychomyia pusilla (Fabricius), Lepidostoma hirtum (Fabricius), Lasiocephala basalis (Kolenati), Agapetus ochripes Curtis and Sericostoma flavicorne Schneider. In nine out of the eleven most abundant species the sex ratios significantly differed from 1:1, with an excess of females. Of the meteorological parameters tested, only the effect of air temperature was significant. An upstream shift of faunal zonation patterns from epipotamon to meta‐ and hyporhithron could be detected at the station which is influenced by hypolimnetic water release.
Influence of Environmental Heterogeneity on the Structure of Testate Amoebae (Protozoa, Rhizopoda) Assemblages in the Plankton of the Upper Paraná River Floodplain, Brazil
Authors: Velho Luiz Felipe Machado , Lansac‐Tôha Fábio Amodêo , Bini Luis Mauricio 
Published: May 2003

AbstractIn freshwater environments, testate amoebae are usually found associated with macrophytes and sediments and many studies have suggested that their occurrence in plankton samples is accidental. This implies that predictable patterns detected in planktonic assemblages should not be observed in testate amoebae assemblages. This hypothesis was tested in this study. Plankton samples were collected from different environments in the Upper Paraná River floodplain. Results show that patterns in species composition and abundance of testate amoebae are predictable, and that dominant species tend to present characteristic shell morphology in hydrologically different environments. We suggest that testate amoebae must be routinely included in plankton ecology studies, at least in floodplain environments.
Effect of Campsurus notatus on NH+4, DOC Fluxes, O2 Uptake and Bacterioplankton Production in Experimental Microcosms with Sediment‐Water Interface of an Amazonian Lake Impacted by Bauxite Tailings
Authors: Leal João José Fonseca , de Assis Esteves Francisco , Farjalla Vinicius Fortes , Enrich‐Prast Alex 
Published: May 2003

AbstractThe aim of this study was to evaluate the influence of Campusurus notatus Eaton 1868 (Ephemeroptera: Polimitarciydae) and the impact of bauxite tailings on ammonium (NH4+) and dissolved organic carbon (DOC) fluxes, oxygen uptake and bacterioplankton production in the sediment‐water interface of Lake Batata, a shallow Amazonian floodplain lake. Mesocosms were constructed from natural and impacted areas of Lake Batata, to reproduce the sediment‐water interface. The cores were incubated with 0 to 2,388 ind m–2 of Campsurus notatus nymphs, and the changes in NH4+, DOC, O2 concentration and bacterioplankton production in the overlying water column were measured. Ammonium efflux (F = 9.8, p < 0.05, multiple regression) and oxygen uptake (F = 11.8, p < 0.05) showed a significant correlation with the density of C. notatus in the cores with natural sediment. No differences on DOC release were observed in cores with natural or impacted sediment. In the cores incubated with natural sediment and nymphs of C. notatus, a significant increase (Two‐way ANOVA, p < 0.05) in bacterial production (0.44 μg C l–1 h–1) was observed after 3 hours of incubation. In cores incubated with sediment impacted by bauxite tailings, there was no difference in bacterial production with and without C. notatus. We conclude that C. notatus is an important bioturbator in Lake Batata, increasing the turnover rate of nitrogen (NH4+) at the sediment‐water interface and bacterial production in cores incubated with natural sediment. It is also clear that bauxite tailings reduce the nutrients turnover rates in impacted regions of Lake Batata and influence bacterial production.
The Ratios of Carbon, Nitrogen, and Phosphorus in a Wetland Coastal Ecosystem of Southern India
Authors: Mathews Lizen , Chandramohanakumar N. 
Published: May 2003

AbstractThe fertility of the coastal and estuarine waters is of great concern because of its influence on the productivity of these waters. Seasonal variations in the distribution of organic carbon, total nitrogen and total phosphorus in the sediments of Kuttanad Waters, a part of the tropical Cochin Estuary on the south west coast of India, are examined to identify the contribution of sediments to the fertility of the aquatic systems. The adjoining region has considerable agricultural activity. The fresh water zones had higher quantities of silt and clay whereas the estuarine zone was more sandy. Organic carbon, total phosphorus and total nitrogen were higher in the fresh water zones and lower in the estuarine zones. Total phosphorus and organic carbon showed the lowest values during monsoon periods. No significant trends were observed in the seasonal distributions of total nitrogen.Ratios of C/N, C/P and N/P, and the phosphorus and nitrogen content indicate significant modification in the character of the organic matter. Substantial amounts of the organic matter can contribute to reducing conditions and modify diagenetic processes.
Thermocyclops dumonti sp. n. (Crustacea, Copepoda), from a Temporary Waterbody in China
Authors: Baribwegure Deo , Mirabdullayev Iskandar M. 
Published: May 2003

AbstractSix species of the genus Thermocyclops have hitherto been known from Chinese freshwaters. A new species is here recorded from a sample collected from an eutrophic pool in central China. It is described and compared using classical morphology and mapping of its pore signature. Thermocyclops dumonti differs from T. kawamurai by absence of ornamentation on prominences of intercoxal plates of P1‐P3, by relative length of apical spines of Enp3P4 and caudal ramus. It differs from T. dybowskii by ornamentation of P4 intercoxal plate, relative length of Enp3P4 and caudal ramus, by shape of Tmi. As in other species of Thermocyclops, the perforations are bilaterally symmetrical and, species‐specific patterns occur on the cephalosome, metasome, and urosome. Conserved patterns are found elsewhere on the rostrum, cephalosome, metasome, and furcal branches. Based on pore pattern, Thermocyclops dumonti is separated from two close relatives, T. schmeili and T. dybowskii.