Bibliothek

feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • 1990-1994  (4)
  • 1994  (2)
  • 1991  (2)
Materialart
Erscheinungszeitraum
  • 1990-1994  (4)
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 58 (1991), S. 39-41 
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The effect of silicon nitride (SiN) deposition on hydrogenated amorphous silicon (a-Si:H) has been investigated to find the origin of the difference of a-Si:H/SiN interface properties caused by the order of deposition. Sheet conductance of the on-state in inverted staggered (a-Si:H on SiN) thin-film transistors (TFTs) increases gradually with the substrate temperature (Tsub) of SiN, but decreases rapidly with the Tsub of SiN in staggered TFTs (SiN on a-Si:H). Photoluminescence experiments indicated that the degradation in staggered TFTs was due to the creation of defects in a-Si:H by the deposition of the SiN overlayer. It was shown by Fourier transform infrared attenuated total reflection that the origin of the defects was hydrogen effusion from a-Si:H.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 2
    ISSN: 1365-2133
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Summary Altered expression of α-smooth muscle actin (α-SMA) is known to indicate the morphological, tumorigenic and immunological changes occurring in tumour and stromal cells. The purpose of this study was to analyse the dynamics of α-SMA expression in human basal cell epithelioma (BCE) cells and their surrounding stromal cells, in the process of differentiation towards cutaneous appendages such as hair, sebaceous, apocrine and eccrine glands. Using anti-α-SMA specific monoclonal antibody (MAb), 17 of 36 BCEs (47%) were shown to express α-SMA, despite the usual absence of α-SMA in all eukaryotic cells except muscle cells. Solid, adenoid and sclerosing types of BCE expressed α-SMA more frequently, and in greater amount, than cystic, keratotic and superficial types. Furthermore, the expression of α-SMA in BCE cells significantly paralleled the expression of proliferating cell nuclear antigen (PCNA) in these cells. Thus, the altered expression of α-SMA may reflect the growing properties of BCE cells under the specific cellular regulations for differentiation.In addition, we have found anti-α-SMA MAb-positive fibroblasts with smooth muscle differentiation (myofibroblasts) in desmoplastic stroma surrounding BCE nests in 13 of 36 cases (36%). Coincidental expression of α-SMA in both BCE cells and stromal cells was found in nine of the 13 cases (69%), indicating the possibility of the induction of myofibroblastic stromal changes in surrounding tissues by cytokines secreted from BCE cells [e.g. basic fibroblast growth factor (bFGF)-like factor].
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 3
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 130 (1994), S. 0 
    ISSN: 1365-2133
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Summary It has been proposed that basic fibroblast growth factor (bFGF) is an autocrine growth factor of melanoma cells, in contrast with normal melanocytes where bFGF acts as a paracrine growth factor. As this notion is mostly based on the different requirements for bFGF in cultures of benign and malignant pigment cells in vitro, we performed an immunohistochemical study to examine bFGF expression in vivo using paraffin sections from naevus cell naevi (NCN) and malignant melanoma (MM). All the NCN (n=7) showed strong and homogeneous expression of bFGF protein, whereas the primary MMs (n=5) showed heterogeneous expression, with a population of negative cells. Metastatic MMs (n=5) also showed heterogeneous expression, and had a greater population of negative cells. These results suggest that bFGF has some, as yet unidentitied, role in the growth of benign NCN, and that overexpression of bFGF is neither a prerequisite for melanoma genesis nor for progression to metastatic MM.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Surgical and radiologic anatomy 13 (1991), S. 89-104 
    ISSN: 1279-8517
    Schlagwort(e): Gallbladder ; Lymphatic system ; Carcinoma ; Macroscopic anatomy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Résumé A partir de la dissection fine des lymphatiques de la vésicule effectuée sur 4 sujets adultes, trois voies de drainages ont pu être schématisées. 1) La voie cholécysto-rétro pancréatique qui peut être considérée comme la principale, comporte deux trajets, l'un descendant en spirale de la face antérieure de la voie biliaire principale vers son bord postéro-droit, et l'autre descendant directement à la face postérieure du conduit biliaire. Dans leur segment rétroportal, ces voies convergent vers un important nœud lymphatique qui apparaît comme le principal nœud terminal de cette voie. Nous l'avons dénommé le nœud principal rétroportal. 2) La voie cholécysto-cœliaque est utilisée par quelques lymphatiques de la vésicule biliaire qui se dirigent vers la gauche à travers le ligament hépato-duodénal pour rejoindre les nœuds cœliaques. 3) La voie cholécysto-mésentérique est empruntée par des lymphatiques qui descendent vers la gauche en avant de la veine porte et rejoignant les nœuds situés à l'origine de l'artère mésentérique supérieure. Ces trois voies convergent vers les nœuds lymphatiques abdomino-aortiques situés à proximité de la veine rénale gauche; les nœuds situés dans l'espace inter-aortico-cave seront particulièrement importants.
    Notizen: Summary Based upon the detailed dissections of the lymphatic system of four adult cadavers, the lymphatic drainage of the gallbladder was divided into three pathways. 1) The cholecysto-retropancreatic pathway, which can be regarded as the main pathway, had two routes, one running spirally and posteriorly from the anterior surface of the common bile duct to the right, and the other running almost straight down from the posterior surface of the common bile duct. At the retroportal segment, these routes converged at a large lymph node, which appeared critical as the main terminal lymph node of this pathway. We designated this node the principal retroportal node. 2) The cholecysto-celiac pathway was the route by which some of the lymphatics from the gallbladder ran to the left through the hepatoduodenal ligament to reach the celiac nodes. 3) The cholecysto-mesenteric pathway was the route by which some of the lymphatics ran to the left in front of the portal vein and connected with the nodes at the superior mesenteric root. These three pathways converged with the abdomino-aortic lymph nodes near the left renal vein; in particular, the nodes in the interaortico-caval space were considered important.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...