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  • Neurosecretion
  • Volumetrie
  • Springer  (20)
  • American Geophysical Union
  • Irkutsk : Ross. Akad. Nauk, Sibirskoe Otd., Inst. Zemnoj Kory
  • Krefeld : Geologischer Dienst Nordhein-Westfalen
  • Wiley
  • 2015-2019
  • 2005-2009
  • 1995-1999
  • 1975-1979  (20)
  • 1970-1974
  • 1978  (20)
Sammlung
Schlagwörter
Verlag/Herausgeber
  • Springer  (20)
  • American Geophysical Union
  • Irkutsk : Ross. Akad. Nauk, Sibirskoe Otd., Inst. Zemnoj Kory
  • Krefeld : Geologischer Dienst Nordhein-Westfalen
  • Wiley
Erscheinungszeitraum
  • 2015-2019
  • 2005-2009
  • 1995-1999
  • 1975-1979  (20)
  • 1970-1974
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Titrimetry in a continuous flow system (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 293 (1978), S. 413-415 
    Details
    ISSN: 1618-2650
    Schlagwort(e): Best. von Sulfat in Umweltmaterial ; Volumetrie ; Durchflußsystem, Dimethylsulfonazo als Indicator
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00471465
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Delafield's haematoxylin as a new indicator in the nitritometric determination of aromatic primary amines (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 292 (1978), S. 414-414 
    Details
    ISSN: 1618-2650
    Schlagwort(e): Best. von Aminen, aromat. primäre ; Volumetrie ; Nitrit, Hämatoxylin als Indicator
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00481568
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Zur Anwendung der magnetischen Titration (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 291 (1978), S. 39-41 
    Details
    ISSN: 1618-2650
    Schlagwort(e): Best. von Nickel, Jodid ; Volumetrie ; magnetisch, Meßanordnung
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Eine einfache Meßanordnung für die magnetische Titration wird vorgestellt. Anhand der Umsetzung von [Ni(NH3)6]2+ mit CN− und von J− mit Cr2O7 2− wird gezeigt, daß sich dieses Meßverfahren unter bestimmten Voraussetzungen in der quantitativen Analyse einsetzen läßt. Zur Auswertung der Titrationskurven wird eine Auftragung der Kraft im Magnetfeld gegen das reziproke Gesamtvolumen vorgeschlagen.
    Notizen: Summary A simple measuring equipment for magnetic titration is described. On the basis of the reaction of [Ni(NH3)6]2+ with CN− and J− with Cr2O7 2− it is shown that under certain conditions this method is useful in quantitative analysis. For evaluation of the titration curves, a plot of the force in the magnetic field against the reciprocal of the total volume is proposed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00468551
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Scanning and transmission electron microscopy of the subfornical organ of the grass frog (Rana pipiens) (1978)
    Springer
    Cell & tissue research 186 (1978), S. 361-374 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Subfornical organ ; Circumventricular organs ; CSF-contacting neurons ; Encephalo-chromaffin cells ; Neurosecretion ; Rana pipiens
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The ventricular surface of the subfornical organ of the frog is made up of ependymal cells with numerous apical microvilli, occasional cytoplasmic protrusions and many vacuoles projecting into the lumen of the third ventricle. Between these cells dendrites of cerebrospinal fluid-contacting neurons reach the ventricle to terminate in bulbous enlargements. In addition, flask-shaped encephalo-chromaffin cells, containing granulated vesicles and aggregates of filaments in their cytoplasm, project into the cerebrospinal fluid. Surrounding the centrally located capillaries are enlarged dendrites and axons of heterogeneous morphology, some of which appear to originate within the subfornical organ, intermingled with dendrites and axons of normal structure. The glial cells in this region, especially the microglial cells, often contain large lipofuscin inclusions, suggestive of degeneration and subsequent phagocytosis of some of the enlarged dendrites and axons. The normally scarce neurosecretory peptidergic axons become more evident and form typical Herring bodies in stalk-transected animals. Neuronal perikarya of varying morphology are predominantly located peripheral to the region of enlarged dendrites and axons. Supraependymal macrophages are particularly numerous on the subfornical organ.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00225544
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Distribution of fibres reacting with an α-endorphin antiserum in the neurohypophysis of Carassius auratus and Cyprinus carpio (1978)
    Springer
    Cell & tissue research 189 (1978), S. 251-256 
    Details
    ISSN: 1432-0878
    Schlagwort(e): α-Endorphin ; Neurosecretion ; Fish pituitary ; Hypothalamohypophyseal relationships ; Immunocytology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary A strong positive immunoreaction with an α-endorphin antiserum occurs in two distinct sites of the goldfish and carp neurohypophysis. Fluorescent nerve terminals are found in the laminar nerve processes located in the rostral pars distalis, but the immunocytological reaction is mainly localised on the nerve processes of the posterior neurohypophysis lying between the intermediate lobe cells. Almost all the digitations of the neurohypophysis are strongly fluorescent. The immunoreactive fibres probably originate from the hypothalamus, where perikarya displaying the same immunoreaction have been found in the pars lateralis of the nucleus lateralis tuberis and in some minor centres. The possibility that the immunoreactive substances revealed on the neurohypophyseal processes may originate in the intermediate lobe cells is also discussed. It has now to be established if this hypothalamo-hypophyseal system contains a substance with endorphic properties or only some immunologically related substance devoid of the corresponding physiological activities.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00209274
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  • 6
    Digitale Medien
    Digitale Medien
    Synaptic junctions in the sinus gland of the freshwater prawn Palaemon paucidens (1978)
    Springer
    Cell & tissue research 189 (1978), S. 435-440 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Neurosecretion ; Sinus gland ; Synapses ; Palaemon ; Ultrastructure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Two types of neurosecretory fibers, designated as Type 5 and Type 6 axons, in the sinus gland of the freshwater prawn, Palaemon, establish contact with other neurosecretory axons by means of synaptic junctions. This finding strongly supports the view that release of some neurohormones from the eyestalk may be regulated by neurosecretory neurons through synaptic transmission.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00209131
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    The hypothalamo-hypophysial system in acipenseridae (1978)
    Springer
    Cell & tissue research 186 (1978), S. 559-570 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Nucleus praeopticus ; Neurosecretion ; Acipenseridae ; Quantitative study
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The peptidergic neurosecretory cells (NSC) of the nucleus praeopticus (NP) of male and female sturgeons, A. güldenstädti Brandt, were studied light microscopically at different stages of their life cycle and under experimental conditions. Four main NSC types reflecting different phases of secretory cycle and life course of the cell have been tentatively distinguished. The maximum percentage of the high and moderate active NSC are found in juvenile animals in the sea (stages I and I–II of gonadal maturity, sgm), in upstream migrating fish in spring before spawning, in down-stream migrating fish 1–1.5 months after spawning, and in experimental fish kept for 8.5 hours in a 32‰ sodium chloride solution. The least active NSC accumulating neurosecretory material (NSM) are characteristic of juvenile fish (sgm II) in the sea, sturgeons maintained in a sodium chloride solution for 3.5 or 6 hours and fish which remained in a net, thrown to the sea, for some hours before fixation. The lowest percentage of these cells is observed in autumn migrants, in females soon after spawning (sgm VI) and in fish kept for 8.5 hours in a sodium chloride solution. Cells rich in basophilic substance and poor in NSM occur in juvenile and in down-stream migrating fish. Cells reflecting the state of exhaustion after hyperactivity and “ageing” cells are seen in adults, especially in sgm VI fish, and in autumn migrants. Pyknomorphous NSC are constantly present in all fish; they are most numerous in sturgeons found in a net. A diagram demonstrating the life course and the secretory cycle of the NSC is presented and the role of the hypothalamo-hypophysial neurosecretory system (HHNS) under stress conditions is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00224944
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  • 8
    Digitale Medien
    Digitale Medien
    Immunofluorescence of somatostatin-producing sites in the hypothalamus of the tadpole, Alytes obstetricans Laur. (1978)
    Springer
    Cell & tissue research 187 (1978), S. 315-321 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Hypothalamus ; Tadpole, Alytes obstetricans ; Neurosecretion ; Somatostatin ; Immunofluorescence
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Three sites of somatostatin-synthesizing perikarya, or a related antigen, were determined by immunofluorescence in the hypothalamus of the tadpole, Alytes obstetricans (Amphibia, Anura). Two sites of neurosecretory perikarya were localized in the preoptic nuclei of the anterior hypothalamus; the axons extended either to the anterior diencephalon or to the median eminence and the pituitary. The third site was found in the posterior hypothalamus. These neurosecretory cells showed a strong immunofluorescent reaction; their axons all terminated at the level of the median eminence. Somatostatin cells were only found in intact or hypophysectomized tadpoles given somatotropin (STH). The strong reaction observed in hypophysectomized tadpoles was possibly due to the loss of the terminal portion of the neurosecretory pathway (median eminence and pituitary) by which the agent is transported to the site of discharge.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00224373
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  • 9
    Digitale Medien
    Digitale Medien
    The ultrastructure of the herring bodies in rats subjected to different experimental conditions (1978)
    Springer
    Cell & tissue research 189 (1978), S. 41-51 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Herring bodies (rat) ; Colchicine ; Cold ; Neurosecretion ; Ultrastructure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary A study of the morphology of Herring bodies of the posterior pituitary lobe of rats treated with colchicine and/or exposed to low temperatures has been performed. After treatment with colchicine (20 μg in distilled water injected intracisternally) a predominance of Herring bodies with a large number of small “synaptic-like” vesicles surrounded by neurosecretory granules is found. Exposures to low temperature (4–6° C) result in an increase in the neurosecretory material and the Herring bodies show many neurosecretory granules of different densities. After treatment with colchicine and subsequent exposure to low temperatures, the Herring bodies are characterized by having a great number of autophagic bodies which become more numerous as the length of the exposure is increased; later autophagic vacuoles and lamellar bodies become evident.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00223120
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  • 10
    Digitale Medien
    Digitale Medien
    Structural re-evaluation of the neurosecretory system in the crayfish eyestalk (1978)
    Springer
    Cell & tissue research 190 (1978), S. 235-246 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Neurosecretion ; Cobalt backfilling ; Crustacea ; Sinus gland ; X organ
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The topography of the neurosecretory system in the decapod eyestalk has not been precisely delineated with light microscopy. Cobalt iontophoresis and electron microscopy have proved useful in clarifying the microstructure of this system. The sinus gland (sg) of the crayfish eyestalk consists of aggregated axon terminals which end at or near the blood space, lontophoresing cobalt back through the cut base of the sinus glands reveals proximal cell bodies in the eyestalk only in the X organ (Xo) region. Electron microscopy demonstrates that axons from about 115 neurosecretory cell bodies in the Xo form the Xo-sg tract. Intermingled with these Xo somata are smaller non-neurosecretory cell bodies which do not send axons into the sinus gland. One of these exhibits catecholamine fluorescence. Backfilling also reveals a second group of fibres which run from the brain along the optic tract and into the sinus gland. These brain-sg fibres are smaller in diameter than Xo-sg axons and lack neurosecretory vesicles. From these fibres collaterals extend into the eyestalk neuropil, especially in the proximity of the visual elements. The possible function of these non-neurosecretory processes within the sinus gland is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00218172
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  • 11
    Digitale Medien
    Digitale Medien
    Fine structural and cytochemical study of the innervation of smooth muscle in an amphibian (Bufo marinus) lung before and after denervation (1978)
    Springer
    Cell & tissue research 194 (1978), S. 419-432 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Lung ; Bufo marinus ; Innervation ; Adrenergic nerves ; Neurosecretion
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The innervation of the toad (Bufo marinus) lung was studied with transmission electron microscopy and fluorescence techniques, both before and after 12 or 20 days close vagosympathetic denervation. Four cytologically distinct types of neuronal processes were recognised, in relation to the visceral muscles of the lung. These were described as cholinergic, adrenergic, nonadrenergic/non-cholinergic (NANC) and sensory on the basis of the characteristics of their vesicular content and cytochemical reactions. An apparent efferent innervation of visceral smooth muscle was achieved by NANC (50%), cholinergic (25%) and adrenergic (25%) fibres. A few sensory fibres were also present. After denervation only NANC fibres persisted, showing that the cell bodies of these fibres were intrapulmonary. The vascular smooth muscle was supplied by cholinergic, adrenergic and sensory fibres. In the walls of the proximal branches of the pulmonary artery were fibres containing large dense-cored vesicles. These profiles, which were associated with the vasa vasorum, were similar to neurosecretory fibres. After denervation all neural profiles associated with the vasculature had degenerated. The observations suggest that vagal vasodepressor effects in the toad lung are mediated indirectly through relaxation of visceral muscle strands which in their contracted state compress vascular channels.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00236163
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  • 12
    Digitale Medien
    Digitale Medien
    Tropolone: A new extractive indicator for the determination of iron(III) (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 291 (1978), S. 127-128 
    Details
    ISSN: 1618-2650
    Schlagwort(e): Best. von Eisen(III) mit Tropolon als Indicator ; Volumetrie ; ÄDTA
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00482553
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  • 13
    Digitale Medien
    Digitale Medien
    Determination of sulphur in pyrite by combustion (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 292 (1978), S. 300-301 
    Details
    ISSN: 1618-2650
    Schlagwort(e): Best. von Schwefel in Pyrit ; Volumetrie ; Verbrennung
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00493703
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  • 14
    Digitale Medien
    Digitale Medien
    The non-aqueous titration of benzotrifuroxan (BTF) (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 289 (1978), S. 44-46 
    Details
    ISSN: 1618-2650
    Schlagwort(e): Best. von Benzotrifuroxan ; Volumetrie ; nichtwäßr. Lösung
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Summary BTF can be titrated potentiometrically as an acid with tetrabutylammonium hydroxide in DMF, DMSO, acetone, pyridine, or TMG. The solvent of choice is DMF which yields the steepest titration curve and the lowest standard deviation. The equivalent weight of BTF is dependent on the solvent used, indicating a strong interaction with the solvent. In DMF the equivalent weight of BTF is 151.3, corresponding to 1.67 equivalents per mole.
    Notizen: Zusammenfassung F kann potentiometrisch als Säure mit Tetrabutylammoniumhydroxid in Dimethylformamid, Dimethylsulfoxid, Aceton, Pyridin oder Tetramethylguanidin titriert werden. Dimethylformamid ist am vorteilhaftesten, da es die steilste Titrationskurve und die niedrigste Standardabweichung (0,43%) bietet. Das Äquivalentgewicht von BTF hängt von dem gewählten Lösungsmittel ab. Dies deutet auf eine beträchtliche Wechselwirkung mit dem Lösungsmittel hin. In Dimethylformamid beträgt das Äquivalentgewicht 151,3, entsprechend 1,67 Äquivalenten pro Mol.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00449239
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  • 15
    Digitale Medien
    Digitale Medien
    Note on the potentiometric titration of some acid triphenylmethane dyes in non-aqueous solvents (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 289 (1978), S. 207-207 
    Details
    ISSN: 1618-2650
    Schlagwort(e): Best. von Triphenylmethanfarbstoffen ; Volumetrie ; nichtwäßrig
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00440273
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  • 16
    Digitale Medien
    Digitale Medien
    Tropolone as an extractive indicator in EDTA titrations of copper in alloys (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 289 (1978), S. 208-208 
    Details
    ISSN: 1618-2650
    Schlagwort(e): Best. von Kupfer in Legierungen ; Volumetrie ; ÄDTA
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00440275
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  • 17
    Digitale Medien
    Digitale Medien
    Microdetermination of hexacyanoferrate(II) with iodine using an amplification reaction (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 289 (1978), S. 368-368 
    Details
    ISSN: 1618-2650
    Schlagwort(e): Best. von Hexacyanoferrat(II) mit Jod ; Volumetrie ; Vervielfachung
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00439730
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  • 18
    Digitale Medien
    Digitale Medien
    Korrektur des Temperatureinflusses bei volumetrischen Arbeiten (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 290 (1978), S. 315-316 
    Details
    ISSN: 1618-2650
    Schlagwort(e): Volumetrie ; Korrektur des Temperatureinflusses, Eichung
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00470135
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  • 19
    Digitale Medien
    Digitale Medien
    Bifunktionelle Titrationen von Metallionen mit Komplexbildnern gegen die Glaselektrode (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 291 (1978), S. 319-323 
    Details
    ISSN: 1618-2650
    Schlagwort(e): Best. von Metallionen, Kupferlegierungen, Nickellegierungen, Zinklegierungen ; Volumetrie ; DCyTE (CDTA), Glas-Elektrode
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Komplexometrische Titrationen mit DCyTE/NaOH (CDTA/NaOH)-Maßlösungen können gegen die Glaselektrode indiziert werden. Im Anschluß an frühere Mitteilungen werden neue Einzelbestimmungen und Trennungen von Metallionen beschrieben. Eine Arbeitsvorschrift zur Untersuchung von Cu-Ni-Zn-Legierungen wird gegeben. Die relative Standardabweichung liegt meist zwischen ±0,2 % und ±0,6%
    Notizen: Summary Complexometric titrations with DCyTE/NaOH (CDTA/NaOH) standard solutions can be indicated with the glass electrode. In continuation of previous works, new single determinations and separations of metal ions has become possible. A procedure for the determination of Cu-Ni-Zn alloys is described. The relative standard deviation is mostly between ±0.2% and ±0.6%.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00491948
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  • 20
    Digitale Medien
    Digitale Medien
    Titrimetry in a continuous flow system (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 292 (1978), S. 290-292 
    Details
    ISSN: 1618-2650
    Schlagwort(e): Best. von Sulfat mit Barium ; Volumetrie ; Durchflußsystem, Apparatur, Dimethylsulfonazo(III) als Indicator
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Summary Sulphate in the range of 5–2000 μmol · l−1 is automatically titrated with Ba(II) in a device with an optical detection which is able to correct automatically for dilution and turbidities. The flow-through system contains 80% v/v ethanol; the indicator is dimethyl sulfonazo(III). Above a concentration level of about 20 μmol · l−1 SO 4 2− the standard deviation is less than 5% rel. The titration time is negligibly small as compared to the sampling time.
    Notizen: Zusammenfassung Sulfat wird im Bereich von 5–2000 μmol · l−1 automatisch mit Ba(II) mit einem Gerät mit optischer Detektion titriert, das automatisch für Verdünnung und Trübung korrigieren kann. Das Durchflußsystem enthält 80% v/v Äthanol; Indicator ist Dimethylsulfonazo(III). Die Standardabweichung für Proben mit einem Sulfatgehalt höher als 20 μmol · l−1 ist niedriger als 5% rel. Die Titrationsdauer ist vernachlässigbar im Vergleich mit der Zeit für die Probennahme.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00493698
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