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  • 1990-1994  (37)
  • 1994  (37)
  • 1
    Electronic Resource
    Electronic Resource
    Anatomic basis of venous drainage in gastric tubular esophagoplasty (1994)
    Springer
    Surgical and radiologic anatomy 16 (1994), S. 221-228 
    Details
    ISSN: 1279-8517
    Keywords: Stomach ; Venous drainage ; Gastric esophagoplasty
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Ce travail a été effectué dans le but de préciser l'architecture générale du système veineux de l'estomac et son mode de drainage dans des conditions normales. Il est aussi motivé par la recherche du rôle du drainage veineux dans la genèse des désunions, des fistules anastomotiques, des sténoses après oesophagoplastie tubulée pédiculisée sur les vaisseaux gastro-épiploïques droits. 60 estomacs prélevés sur des cadavres frais ont été étudiés par la méthode d'injection-corrosion. Le produit utilisé est l'Altufix P10 coloré. 35 pièces ont été injectées globalement par la veine mésentérique supérieure, 15 pièces par la même voie mais après clampage de la veine splénique, de la veine gastrique gauche et de la veine gastrique droite, ce qui correspond a la technique de gastrolyse effectuée pour oesophagoplastie, et 10 ont été injectées simultanément par les produits colorés en quatre couleurs par les veines gastrique gauche, gastrique droite, mésentérique supérieure et splénique (ou liénale) pour préciser leur territories correspondants. L'origine, le trajet, la terminaison, le territoire et le calibre des principales veines de l'estomac ont été étudiés. L'analyse des résultats permet de confirmer la richesse des anastomoses veineuses de l'estomac qui s'effectuent d'une part, entre deux arcades extrapariétales au niveau de la grande et de la petite courbure, et d'autre part au niveau de communications intrapariétales disposées perpendiculairement à ces deux arcades. Il apparaît que la veine gastro-épiploïque droite ne peut pas toujours assurer le drainage de la totalité de l'estomac. Les facteurs influençants sont discutés. Le risque de stase veineuse dans l'oesophagoplastie gastrique doit toujours être pris en compte.
    Notes: Summary This study was made with the aim of specifying the general architecture of the venous system of the stomach and its mode of drainage under normal conditions, and also of investigating the role of the venous drainage in the origin of disunion, anastomotic fistula and structure after tubular esophagoplasty pedicled on the right gastroepiploic vessels. Sixty stomachs removed from fresh cadavers were studied by injection-corrosion, using colored Altufix P10 as the injection mass. 35 specimens were injected globally via the superior mesenteric v., 15 by the same route but after clamping of the splenic, left gastric and right gastric vv., which corresponds to the technique of gastrolysis performed in esophagoplasty, and 10 were injected simultaneously with media of four different colors via the left gastric, right gastric, superior mesenteric and splenic vv. to define their respective territories. Also studied were the origin, course, termination, territory and caliber of the main gastric veins. Analysis of the results confirmed the richness of the venous anastomoses of the stomach, effected on the one hand between the two extraparietal arches at the greater and lesser curvatures, and on the other by intraperitoneal communications arranged perpendicular to these two arches. It emerges that the right gastroepiploic v. cannot always ensure drainage of the entire stomach. The factors involved are discussed. The risk of venous stasis in gastric esophagoplasty must always be borne in mind.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01627675
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  • 2
    Electronic Resource
    Electronic Resource
    Radioanatomic study of the gastrocolic venous trunk (1994)
    Springer
    Surgical and radiologic anatomy 16 (1994), S. 413-418 
    Details
    ISSN: 1279-8517
    Keywords: Gastrocolic venous trunk ; Superior mesenteric vein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Le mode de constitution, les mensurations et la fréquence du tronc veineux gastro-colique ont été étudiés par la technique d'injection-corrosion sur une série de 54 pièces anatomiques et par l'analyse de 50 examens TDM chez des patients indemnes de pathologie hépatique ou pancréatique. Le tronc gastrocolique a été retrouvé 51 fois sur 54 pièces anatomiques et 27 fois sur 50 examens TDM. Sa grande variabilité de constitution, de bipode, à tripode ou quadripode a été notée. Avec un diamètre moyen de 4,9 mm, il débouche sur les faces antérieure, droite ou antéro-gauche de la veine mésentérique supérieure à une distance moyenne de 15 mm au dessous du bord inférieur du confluent spléno-mésentérique. L'intérêt de la tomodensitométrie dans le bilan préopératoire d'une intervention pour hypertension portale ou tumeur du pancréas, ou dans le diagnostic d'une thrombose splénique, est mis en exergue.
    Notes: Summary The mode of formation, measurements and frequency of occurrence of the gastrocolic venous trunk were studied by the injection-corrosion technique in a series of 54 anatomic specimens and by the analysis of 50 CT studies in patients without hepatic or pancreatic disease. The gastrocolic trunk was found in 51 of the 54 anatomic specimens and in 27 of the 50 CT studies. The great variability in its formation, whether bipodal, tripodal or quadripodal, was noted. With a mean diameter of 4.9 mm, it opened into the anterior, right or antero-left aspects of the superior mesenteric v. at a mean distance of 15 mm below the inferior border of the spleno-mesenteric confluence. The value of preliminary CT assessment before an operation for portal hypertension or a pancreatic tumor or in the diagnosis of a splenic thrombosis is emphasised.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01627663
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  • 3
    Electronic Resource
    Electronic Resource
    Sustained viability and profileration of hemocytes from the cultured pharynx of Styela clava (1994)
    Springer
    Marine biology 119 (1994), S. 597-603 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In order to acquire more in-depth information on the site(s) of hemopoiesis in marine animals, we successfully cultured pharyngeal explants of the tunicate Styela clava over a period of 82 d. Transmission electron microscopy of resident hemocytes within explants revealed changes in hemocyte composition. Hemoblast-like cells increased shortly after commencement of the cultures (8.1% at Day 0 increasing to a maximum of 28.7% at Day 7). Autoradiography using 3H-thymidine incorporation confirmed that hemocyte proliferation in pharyngeal explants still continued after 37 d culture. During culture, the migration of many free cells into the medium resulted in sparse, residential hemocytes in the pharyngeal explants. Hemocyte migration increased by up to 4.3x105 cells/explant (max.) at 17 to 24 d, but finally decreased to 4.9x104 cells/explant at 75 to 82 d. Vital neutral-red staining revealed that many emerging cells were not hemocytes such as those found in the normal hemolymph. The continued development of in vitro approaches will strengthen analyses of immune-defense responses in tunicates which, as protochordates, are the immediate invertebrate ancestors of vertebrates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00354323
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  • 4
    Electronic Resource
    Electronic Resource
    The topological structure of connexin 26 and its distribution compared to connexin 32 in hepatic gap junctions (1994)
    Springer
    The journal of membrane biology 139 (1994), S. 15-29 
    Details
    ISSN: 1432-1424
    Keywords: Membrane ; Protein ; Folding ; Antibodies ; Channels
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Of the gap junction proteins characterized to date, Cx26 is unique in that it is usually expressed in conjunction with other members of the family, typically Cx32 (liver [Nicholson et al., Nature 329:732–734, 1987], pancreas, kidney, and stomach [J.-T. Zhang, B.J. Nicholson, J. Cell Biol. 109:3391–3410, 1989]), or Cx43 (leptomeninges [D.C. Spray et al., Brain Res. 568:1–14, 1991] and pineal gland [J.C. Sáez et al., Brain Res. 568:265–275,1991]). We have used specific antisera both to investigate the distribution of Cx32 and Cx26 in isolated liver gap junctions, and empirically establish the topological model of Cx26 suggested by its sequence and analogy to other connexins. Antipeptide antisera were prepared to four of the five hydrophilic domains which flank the four putative transmembrane spanning regions of Cx26. Antibodies to N-terminal residues 1–17 (αCx26-N), to residues 101–119 in the putative cytoplasmic loop (αCx26-CL), and to C-terminal residues 210–226 (αCx26-C) were all specific for Cx26. An antibody to residues 166–185 between hydrophobic domains 3 and 4 of Cx32 had affinity for both Cx26 and Cx32 (αCx32/26-E2). The antigenic sites Cx26-N, -CL and -C were each demonstrated to be cytoplasmically disposed, although the latter was conformationally hidden prior to partial proteolysis. The antigenic site for αCx32/26-E2 was only accessible after exposure of the extracellular face by separation of the junctional membranes in 8 m urea, pH 12.3. This treatment also served to reveal the region between residues 45 and 66 to Asp-N protease. The topology thus demonstrated for Cx26 is consistent with that deduced for other connexins (i.e., Cx32 and Cx43). Comparison of immunogold decorated gap junctions reacted with antibodies specific to Cx26 (αCx26-N and -CL), or to Cx32 [αCx32-CL], indicates that these connexins do not aggregate in subdomains within a junction, at least within the resolution provided by the labeling density (one antibody per 15–22 connexons). Although the presence of both connexins within a single channel could not be distinguished, possible interactions between channels is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00232671
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  • 5
    Electronic Resource
    Electronic Resource
    The venous drainage of the pancreas (1994)
    Springer
    Surgical and radiologic anatomy 16 (1994), S. 37-45 
    Details
    ISSN: 1279-8517
    Keywords: Pancreas ; Pancreatic veins ; Duodenum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Dans le but d'éclaircir certains aspects contradictoires de la description du drainage veineux du pancréas, une revue de la littérature et une recherche anatomique ont été effectuées. Cinquante blocs duodénopancréatiques ont été étudiés selon la technique d'injection-corrosion, desquels 45 ont été retenus pour l'étude du pancréas droit et 37 pour celle du pancréas gauche. Le drainage veineux du duodéno-pancréas est assuré suivant deux territoires: un postérosupérieur et un antéro-inférieur, le premier se drainant vers la v. porte et le deuxième dans la v.mésentérique supérieure. La charnière entre les deux est représentée par la v. pancréatico-duodénale inférieure et postérieure (PDIP). Quatre veines assurent le drainage duodéno-pancréatique: pancréatico-duodénale supérieure et antérieure (PDSA), pancréatico-duodénale inférieure et antérieure (PDIA), pancréatico-duodénale supérieure et postérieure (PDSP) et pancréatico-duodénale inférieure et postérieure (PDIP). La veine la plus importante de la face ventrale est la PDSA, celle de la face dorsale est la PDSP. Deux arcades, antérieure et postérieure, ont été retrouvées dans la plupart des cas. Le pancréas gauche se draine dans la v. splénique à travers plusieurs branches collatérales. D'autres veines participent au drainage veineux de l'isthme, du corps et de la queue du pancréas, dont la v. pancréatique inférieure ou transverse.
    Notes: Summary With the aim of clarifying certain contradictory aspects of the description of the venous drainage of the pancreas, a review of the literature and an anatomic study were carried out. Fifty duodeno-pancreatic blocks were studied by the injection-corrosion technique, of which 45 were available for study of the right pancreas and 37 for that of the left pancreas. The venous drainage of the duodeno-pancreas is effected via two territories: a posterosuperior and an anteroinferior, the former draining toward the portal v. and the second into the superior mesenteric v. The borderline between the two is represented by the inferior posterior pancreatico-duodenal (IPPD) v. Four veins ensure duodeno-pancreatic drainage: the superior anterior, inferior anterior, superior posterior and inferior posterior pancreatico-duodenal vv. (SAPD, IAPD, SPPD and IPPD). The major vein of the ventral aspect is the SAPD; that of the dorsal aspect is the SPPD. Two arches, anterior and posterior, were found in the majority of cases. The left pancreas drains into the splenic v. via several collateral branches. Other veins participate in the venous drainage of the isthmus, body and tail of the pancreas, including the inferior or transverse pancreatic v.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01627919
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  • 6
    Electronic Resource
    Electronic Resource
    Femtosecond studies of interparticle electron transfer in a coupled CdS–TiO2 colloidal system (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 6222-6225 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report the direct femtosecond measurements of the electron transfer process from CdS to TiO2 particles in a coupled colloidal system. The electrons initially created in the conduction band and quickly trapped at the liquid–solid interface in aqueous CdS colloids are found to be transferred to the colloidal TiO2 particles with a time constant of 2 ps, resulting in significantly slower electron–hole recombination. These coupled semiconductor colloids provide a potentially useful system for achieving efficient charge separation, which is important for many chemical reactions involving heterogeneous electron transfer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468376
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  • 7
    Electronic Resource
    Electronic Resource
    Intraspecific cleaning behaviour in Cyprinus carpio in aquaria (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 44 (1994), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Intraspecific cleaning behaviour of diseased juvenile Cyprinus carpio L, in experimental tanks in Wuxi, China has been observed and is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1994.tb01594.x
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  • 8
    Electronic Resource
    Electronic Resource
    silver zeolite-modified electrodes: importance of ion-exchange and cation site effects (1994)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 98 (1994), S. 1668-1673 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100057a021
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  • 9
    Electronic Resource
    Electronic Resource
    Femtosecond Studies of Photoinduced Electron Dynamics at the Liquid-Solid Interface of Aqueous CdS Colloids (1994)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 98 (1994), S. 3859-3864 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100065a049
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  • 10
    Electronic Resource
    Electronic Resource
    A full electron LMTO-ASA study of electronic band structure and magnetic properties for RFe11TiNx (R=Y, Nd, Sm; x=0,1) : The 6th joint magnetism and magnetic materials (MMM)−intermag conference (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 6751-6753 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The band structure and magnetic properties are studied for RFe11TiNx (R=Y, Nd, Sm; x=0,1) rare-earth iron intermetallic compounds using the linear muffin tin orbital with the atomic sphere approximation (LMTO-ASA) method. In order to elucidate the role played by the rare-earth atoms in these compounds, a full electron calculation is performed using a semirelativistic spin-polarized LMTO-ASA method in the local spin density approximation (LSDA) regime. The 4f electrons of the rare-earth atoms are considered to be valence electrons in the self-consistent calculations. For NdFe11TiN, a calculation in which the 4f electrons are treated as core-frozen states is also performed, and is compared with the full electron calculation. The effects of N atoms in these compounds are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358151
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