Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 2015-2019
  • 1990-1994  (4)
  • 1994  (4)
Source
Material
Years
  • 2015-2019
  • 1990-1994  (4)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Immunohistochemical localization of endothelin-1 in non-neoplastic and neoplastic adrenal gland tissue (1994)
    Springer
    Virchows Archiv 425 (1994), S. 259-264 
    Details
    ISSN: 1432-2307
    Keywords: Endothelin-1 ; Adrenal gland ; Adrenal tumour ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Endothelin (ET)-1 is a 21-amino acid peptide with potent vasopressor and vasocontrictive properties. Biochemical studies suggest that this peptide occurs in adrenal glands, where it influences steroid hormone production. However, we have found no report of the topographical distribution of this peptide. The localization of ET-1 immunoreactivity in non-neoplastic (37 cases) and neoplastic adrenal glands (48 cases) was investigated with a sensitive immunohistochemical technique applied to routinely processed tissue specimens. ET-1 immunoreactivity was regularly seen in the cortex, especially in the zona fasciculata and to a varying extent also in the other two zones, but not in the medulla. The immunoreactive material appeared in the cytoplasm mostly in the form of vacuolar structures but also as grains. Focally, the cell membrane also showed immunoreactive staining. In the zona reticularis the immunoreactivity appeared mainly as cytoplasmic grains. Most cortical adenomas displayed numerous immunoreactive cells. The immunoreactivity in the tumour tissue appeared in the same forms as in normal cortex, but the reactive products were generally fewer in number. No obvious differences in immunostaining were seen between the aldosterone- and cortisol-producing adenomas or the non-functioning ones. Three of the ten carcinomas contained immunoreactive cells, but they were few, appearing focally and the ET-1 immunoreactive structures were seen as ‘dust-like’ material. The difference in immunoreactivity between the benign and the malignant cortical neoplasms may be of diagnostic value. Functionally our results support a relationship between ET-1 and steroid regulation in non-neoplastic cortical tissue.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00196148
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Mevva ion source for the application of material surface modification : Proceedings of 5th international conference on ion sources (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 1295-1297 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Several versions of Mevva ion sources have been developed in our institute since 1988. It operates in a pulsed mode with a pulse length of 1.2 ms and a repetition rate of up to 50 pps. A time-averaged beam current of 10 or 50 mA has been extracted at 30–80 kV from Mevva IIA-H and Mevva IIB, respectively. In order to develop surface modification of materials by ion implantation we have constructed three kinds of Mevva ion source implantation systems. High dose (3–5×1017 cm−2) implantation with Ti, Ce, Y, and Ti+C, etc. has been carried out for improving the lifetime of metal cutting tools, relay contacts, dies, and some sophisticated components.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144985
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Epitaxial growth of diamond films on the {221} and {100} surfaces of c-BN with microstructures full of (100) facets (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 64 (1994), S. 1941-1943 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Diamond films on surfaces of cubic boron nitride substrate grown by microwave plasma chemical vapor deposition are investigated. Deposited films are characterized by scanning electron microscopy, reflection high-energy electron diffraction, and micro-Raman spectroscopy. We found a new stacking growth mode of the epitaxial diamond films which is distinguished from the previous observed modes. The morphologies of diamond (100) facets formed on the {221} and {100} surfaces of cubic boron nitride are steps and/or stages, respectively. This is beneficial to growing a fair perfect single-crystal films of diamond.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.111749
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Characterization and differentiation of diglycosyl flavonoids by positive ion fast atom bombardment and tandem mass spectrometry (1994)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 23 (1994), S. 406-416 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This study shows that fast atom bombardment (FAB) in combination with collisional activation and tandem mass spectrometric techniques is useful for the characterization of, and the differentiation between, O-diglycosyl, O-C- diglycosyl, and di-C-glycosyl flavonoids. A quick differentiation between the three types of glycosyl flavonoids is possible by simply examining FAB mass spectra. Low-energy product ion spectra of [M + H] + ions have been used for determining the carbohydrate sequence in O-diglycosyl flavonoids and characterizing the terminal mono-saccharide in O-C-diglycosyl flavonoids. The data obtained for per-O- deuterated precursor ion species of O-diglycosyl flavonoids indicate that O-linked hydrogen atoms are involved in the formation of Yn + ions. High-energy product ion spectra of [M + H] + ions enable further characterization and differentiation of isomeric di-6,8-C-glycosides.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200230705
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...