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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 77 (1955), S. 917-919 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 76 (1954), S. 3319-3321 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 76 (1954), S. 3317-3319 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 77 (1955), S. 83-86 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 27 (1971), S. 65-66 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The drinking response of rats seen after the hypotensive drugs phentolamine, isoproterenol and hydralazine/bretylium can be abolished by nephrectomy. It is postulated, that the dipsogenic activity of these drugs is mediated by renin.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 51 (1973), S. 841-857 
    ISSN: 1432-1440
    Keywords: Malignant nephrosclerosis ; hypertension ; haemolytic-uraemic syndrome ; Gasser's syndrome ; syndrome of Moschcowitz ; generalised Shwartzman reaction ; Maligne Nephroskerose ; Hypertension ; hämolytisch-urämisches Syndrom ; Gasser-Syndrom ; Moschcowitz-Syndrom ; generalisiertes Shwartzman-Phänomen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Untersuchung der Nieren von 54 Patienten mit maligner Nephrosklerose ergab, daß aufgrund unterschiedlicher morphologischer und klinischer Befunde eine Differenzierung dieses Krankheitsbildes in zumindest 2 Gruppen erforderlich ist. Bei der ersten Gruppe handelt es sich um Patienten, bei denen sich die maligne Nephrosklerose sekundär im Verlauf einer meist mehrjährigen Hochdruckanamnese entwickelt hatte. Bei der zweiten Gruppe gingen die für die maligne Nephrosklerose kennzeichnenden renalen Gefäßveränderungen, zumindest in einigen Fällen (5 von 22), der malignen Hypertonie voraus. Die letztere Form der malignen Nephrosklerose wird als primäre maligne Nephrosklerose von der hochdruckbedingten sekundären malignen Nephrosklerose abgegrenzt. Von klinischer Seite muß der Verdacht auf eine primäre maligne Nephrosklerose geäußert werden, wenn sich, meist nach uncharakteristischem Infekt, sehr schnell eine Niereninsuffizienz im Sinne des akuten Nierenversagens mit schwerer Anämie bei normalem oder erhöhtem Blutdruck entwickelt. Eine progrediente Entwicklung einer Niereninsuffizienz in mehreren Wochen bzw. Monaten bei Bestehen eines Hypertonus spricht dagegen für eine sekundäre maligne Nephrosklerose. Durch Analyse der vasculären Läsionen bei den beiden Formen der malignen Nephrosklerose konnte gezeigt werden, daß bei der primären malignen Nephrosklerose die Vasa afferentia im Durchschnitt häufiger erkrankt sind als bei der sekundären malignen Nephrosklerose. Die Akuität des Krankheitsverlaufes bei primärer maligner Nephrosklerose bringt es darüber hinaus mit sich, daß bei dieser Erkrankung akute, oft mit Thrombenbildungen einhergehende Gefäßwandschäden dominieren, während bei der sekundären malignen Nephrosklerose die chronischen Gefäßwandläsionen (z. B. produktive Endarteriitis Fahr) stärker hervortreten. Darüber hinaus ergaben unsere Untersuchungen, daß die primäre maligne Nephrosklerose bei im Durchschnitt jüngeren Patienten auftritt als die sekundäre maligne Nephrosklerose, ferner, daß an der primären malignen Nephrosklerose überwiegend Frauen, an der sekundären malignen Nephrosklerose vorwiegend Männer erkranken. Die Beziehungen zwischen primärer maligner Nephrosklerose und dem hämolytisch-urämischen Syndrom Gasser werden aufgezeigt. Ferner wird eine Abgrenzung der primären malignen Nephrosklerose vom Moschcowitz-Syndrom, vom generalisierten Shwartzman-Phänomen sowie von der sog. mikroangiopathischen hämolytischen Anämie versucht.
    Notes: Summary As a result of examining kidneys from 54 patients suffering from malignant nephrosclerosis it proved to be necessary to divide the material into to groups differing with respect to morphological findings and to the clinical course. The first group consists of patients with malignant nephrosclerosis secondary to a long-standing hypertension. In the other group the renal vascular lesions preceded, at least in 5 out of 22 cases, the malignant hypertension. This type is called primary malignant nephrosclerosis and separated from the secondary malignant nephrosclerosis caused by hypertension. From a clinical point of view a primary malignant nephrosclerosis has to be taken into consideration if—frequently after an infectious disease—an acute renal failure associated with a mostly severe anaemia and normal or increased blood pressure rapidly develops. On the other hand a progressive renal failure evolving within several weeks or months of hypertensions is typical of secondary malignant nephrosclerosis. Morphologically, it was shown that in primary malignant nephrosclerosis on an average the afferent arterioles are affected more frequently than in secondary malignant nephrosclerosis. Moreover in primary malignant nephrosclerosis according to the sudden onset of this disease acute, often thrombotic vascular lesions are prevalent in contrast to chronic vascular alterations (e.g. Fahrs productive endarteriitis) in secondary malignant nephrosclerosis. Furthermore our investigations proved a higher frequency of primary malignant nephrosclerosis in younger patients, especially in females, whereas in males more often a secondary malignant nephrosclerosis may be found. The relations of primary malignant nephrosclerosis to Gasser's haemolytic-uraemic syndrome are discussed. An attempt is made to distinguish between primary malignant nephrosclerosis and the syndrome of Moschcowitz, the generalised Shwartzman reaction and the microangiopathic haemolytic anaemia.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-1440
    Keywords: Glomerulonephritis ; Prognose ; Therapie ; Hypertonie ; akutes Nierenversagen ; Glomerulonephritis ; prognosis ; therapy ; hypertension ; acute renal failure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary From repeat biopsies of 291 patients with glomerulonephritis, the clinical and morphological course of the individual forms of glomerulonephritis were compared with one another. From these results we concluded that: 1. Every form of glomerulonephritis has in all probability its individual course and prognosis, which can only be very slightly influenced by therapy. 2. The prognosis is considerably worsened, when either hypertension develops or tubular lesions in the morphological sense of an acute renal failure.
    Notes: Zusammenfassung Der klinische und morphologische Verlauf der einzelnen Glomerulonephritisformen werden anhand von Mehrfachpunktaten der Nieren von 291 Patienten miteinander verglichen. Dabei ergibt sich folgendes: 1. Jede Glomerulonephritisform hat im Sinne der Wahrscheinlichkeit eine eigene Prognose, die nur wenig durch medikamentöse Therapie beeinflußbar ist. 2. Die Prognose verschlechtert sich erheblich, wenn ein Hypertonus oder tubuläre Läsionen im Sinne eines akuten Nierenversagens hinzutreten.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 51 (1979), S. 361-369 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The morphology of the primary tube feet in 15 species of comatulid (unstalked) crinoids from coral reefs in the Palau Islands and Lizard Island, Great Barrier Reef, was investigated using close-up underwater photographs of the tube feet taken in the natural habitat. Measurements of length of the tube feet and their spacing along the pinnule were taken from these photographs. Tube feet of species of the family Comasteridae have a mean length of 0.75 mm and a mean spacing of 6 tube feet mm-1. Tube feet of non-comasterid species occurring in the same environments have a mean length of 0.55 mm and a mean spacing of about 8 tube feet mm-1. The relationship between spacing and length of the tube feet is highty significant for both the Palau and Lizard Island samples (P〈0.01). Species having longer and more widely spaced tube feet live partly concealed within the infrastructure of the reef and hold the arms and pinnules in a multidirectional posture. Species having shorter and more closely spaced tube feet perch on top of reef pinnacles or alcyonarians and form planar filtration fans normal to unidirectional currents or wave oscillations. Longer and more widely spaced tube feet in species dwelling within the reef infrastructure provide more efficient filtration in the slow, meandering flow prevailing there. Closer spacing of the tube feet in species exposed to near-mainstream flow provides a more efficient filtration mechanism at higher flow velocities. Reduced length of the tube feet in these species may be a consequence of closer spacing of the pinnules. Differentiation of these co-occurring species in spacing and length of the tube feet implies differentiation in food particles captured. This may in some cases constitute resource partitioning. Most species which overlap in living habits are significantly different in spacing and length of the tube feet.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Changes in the rates of utilization of dissolved compounds during the period of visceral mass regeneration were examined in the crinoid Cenometra bella (Hartlaub). Rates of respiraton and incorporation of labelled amino acids increase, reaching a maximum 2 d after evisceration and returning to normal after 14 d. Rates of incorporation of radioisotope into the organic components of the arms and cirri decrease, while incorporation rate into the visceral mass increases. Incorporation rates of amino acid-derived radioactivity into skeletal carbonate and the ash-free dry weight:protein ratio of arms, cirri and oral disc decrease, reaching a minimum 2 d following evisceration.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The movement and digestion of food in the gut ofOligometra serripinna (Carpenter) were studied at Lizard Island (14°38′42″S; 145°27′10″E) in the austral winter of 1986. Feather stars in the laboratory were fed a brief, small meal of brine shrimp nauplii and killed at increasing time intervals thereafter. Histological reconstructions showed that the ingested nauplii progressed along the digestive tract surprisingly quickly. Some nauplii were found in the mid and hind intestine in only 30 min, and all of the nauplii had reached the hind intestine and rectum in 1 h. Digestion of the nauplii had started at 1 h, and only a few fragments of naupliar exoskeleton remained in the hind intestine and rectum 5 h after the start of feeding. Videotape analysis showed that no fecal pellets were released during this experiment. In the natural environment ofO. serripinna, ingested particles may similarly be transported quickly to the hind part of the gut and digested there — when feather stars were fixed in the field, most of the gut contents were found in the hind intestine and rectum.O. serripinna, which efficiently rejects inert particles before they are ingested, usually defecates infrequently (probably not more than once over a span of many hours) and differs from some other feather stars that ingest numerous inert particles and defecate much more frequently. When specimens ofO. serripinna were fed continuously on brine shrimp nauplii,Artemia sp. (San Francisco strain), in the laboratory, the feather stars fed gluttonously, packing their guts with several hundred nauplii in 1 to 2 h. Thereafter, superfluous feeding began (i.e., further ingestions appeared to force undigested nauplii, some of them still living, out of the anus). These observations suggest thatO. serripinna usually feeds at relatively modest rates in its natural habitat, but can feed gluttonously to take advantage of infrequent patches of highly concentrated, nutritious particles (e.g. copepod swarms, migrating demersal zooplankton, and invertebrate gametes from mass spawnings). It is likely that such patches of nutritious particles are usually small enough to drift out of reach of the feather stars before gluttonous feeding proceeds to superfluous feeding. Opportunities for superfluous feeding in nature are probably very infrequent (e.g. ingestion of coral gametes and embryos after a mass spawning), and the feather stars evidently have no behavior that stops further ingestions after the gut becomes filled to capacity.
    Type of Medium: Electronic Resource
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