Library

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
  • lithium chloride  (3)
  • Exocrine pancreas  (2)
  • NADPH-diaphorase  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 15 (1986), S. 269-282 
    ISSN: 1572-8927
    Keywords: Activity coefficients ; enthalpy of crystallization ; enthalpy of dissolution ; enthalpy of formation ; lithium chloride ; solubility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The enthalpies of crystallization of LiCl and LiCl·H2O from aqueous solutions at 25°C are reported as measured by a calorimetric method and derived from the previously published concentration dependence of the enthalpy of solution data. The results are compared with those obtained from the concentration dependence of activity coefficients and from the temperature dependence of solubilities.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1435-1463
    Keywords: Nitric oxide synthase ; NADPH-diaphorase ; electron microscopy ; hippocampus ; synapses ; long-term potentiation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The distribution of the enzyme nitric oxide synthase (NOS) was investigated at the ultrastructural level in synaptic structures of the hippocampal formation in relation to long-term potentiation (LTP), based on the histochemical NADPH-diaphorase (NADPH-d) staining with the tetrazolium salt BSPT. BSPT-formazan, the osmiophilic reaction product, was found to be selectively distributed and predominantly attached to membranes of the endoplasmic reticulum. In synaptic regions mainly the presynaptic sides showed labeling. Although several groups have demonstrated a principal involvement of NO in the LTP-mechanism, we found only a low, statistically insignificant increase in NADPH-d stained presynaptic areas of the dentate gyrus, where LTP was evoked. Postsynaptic elements also did not show any noticeable differences. Based on the present results, the predominantly presynaptic localization of NOS should be preferably considered in models describing a functional role of NO in LTP formation, despite the fact that we failed to reveal any indications for an LTP-related change in synaptically located NADPH-d.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 19 (1990), S. 437-446 
    ISSN: 1572-8927
    Keywords: Acetone ; enthalpy of crystallization ; enthalpy of dissolution ; enthalpy of transition ; ion-solvent interaction ; lithium chloride ; methanol ; N,N-dimethylformamide ; solvation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The crystallization enthalpy of LiCl at 25°C in LiCl-H2O-cosolvent systems is determined calorimetrically as a function of the cosolvent content in the mixed solvent. This parameter is used for the investigation of heat phenomena accompanying the solvation of the salt in a saturated solution. The cosolvents employed include methanol, acetone, and N,N-dimethylformamide. The most pronounced change is effected by replacement of water with N,N-dimethylformamide.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 12 (1983), S. 855-860 
    ISSN: 1572-8927
    Keywords: Calorimetry ; mixing enthalpy ; concentrated aqueous solutions ; zinc chloride ; lithium chloride ; hydrated melts ; complex formation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Measurements of the enthalpy of mixing at 25°C for the hydrate system (ZnCl2+RH2O)−(LiCl+RH2O) are reported. A distinct maximum and a pronounced shoulder appears in the enthalpy of mixing data at mole fractions of XZnCl2=0.33 and 0.50, respectively, forR equal to about 4.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neural transmission 7 (1994), S. 115-121 
    ISSN: 1435-1463
    Keywords: Parkinson's disease ; putamen ; NADPH-diaphorase ; nitric oxide synthase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Nitric oxide (NO) is thought to be involved in neurodegenerative processes. Concerning Parkinson's disease (PD) it remains to be elucidated, if NO contributes to pathological alterations in the striatum. The present study evaluates the post-mortem putamen of PD patients and control subjects for distribution patterns of NO-synthase containing neurons, using the NADPH-diaphorase technique. The ratio of positively stained neurons and the total number of cells (control: 1,120±69 per mm2, n=5; PD: 575±164mm2, n=5) shows striking differences between controls and PD patients. Our findings give reason to conclude that NADPH-diaphorase positive structures may have pathogenetic importance in degenerative processes in PD putamen.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 171 (1976), S. 467-482 
    ISSN: 1432-0878
    Keywords: Exocrine pancreas ; Secretion process ; Protein synthesis ; Ultrastructure ; Freeze-fracturing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary After the application of parachlorophenylalanine (pCPA), an amino acid analogue, paracrystalline inclusions are observed in the exocrine pancreas of the rat. The formation of the paracrystalline structures varies according to the dose and the time of examination. Although the first alterations can be seen in the Golgi apparatus and the condensing vacuoles, the main localization of these structures is within the cisternae of the RER. At the same time as degenerative changes occur in the cells, involving autophagic and heterophagic processes, regneration also takes place. With the freeze-fracturing method, the paracrystalline inclusions are interpreted as lamellae or plates of probably altered secretory proteins in extremely extended RER-cisternae. The fracture surfaces of the paracrystals show a periodicity of about 80 Å running diagonally to the main axis of the paracrystalline structures, which are mainly oriented from the basal parts of the exocrine pancreatic cells to the cell apices. The mechanism of paracrystalline formation is discussed on the basis of the morphologic results. It could be shown that after pCPA administration the amylase content is decreased concomittantly with degranulation. pCPA seems not to be incorporated into secretory proteins; high intracellular concentrations, however, are required to induce the formation of the paracrystalline structures. This morphological study is the basis for other studies dealing with secretion and intracellular transport in the pancreatic acinar cell under experimental conditions.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 177 (1977), S. 459-474 
    ISSN: 1432-0878
    Keywords: Exocrine pancreas ; Isolated cells ; Cell membrane ; Tight junctions ; Gap junctions ; Ultrastructure ; Freeze-fracturing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ultrastructure of the cell membrane and intercellular junctions was studied after isolation of exocrine pancreatic cells by tryptic digestion and mechanical treatment. The number and distribution of membrane associated particles does not change significantly when acinar cells in situ are compared to those after the isolation procedure. However, intercellular junctions undergo distinct alterations. Gap junctions in normal pancreatic cells are macular in shape and localized at the lateral parts of the cell membrane. In isolated acinar cells gap junctions are irregularly shaped, more extended, and frequently associated with tight junctions. Tight junctions form belt-like structures which are found to persist after isolation but subsequently become elongated and interrupted. Thus extensive macular areas of tight junctions develop. Further, the strands on the P-face and the grooves on the E-face of freeze-fracture replicas change in array, dissociate, and become loosely packed on large membrane areas. The present investigation shows that the intramembranous proteins of tight and gap junctions are mobile structures within the fluid membrane. The shape of their array is dependent on the form of the intercellular contact zone.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...