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  • 1
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 44 (1988), S. 216-218 
    ISSN: 1420-9071
    Keywords: Antihistamine ; H1-receptor ; feeding elicitation ; α-fluoromethylhistidine ; hypothalamic neuronal histamine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Histamine antagonists were infused into the third ventricle of the cerebrum in rats. All the H1-, but none of the H2-antagonists tested, induced initial feeding during the early portion of the light phase when histamine level was highest. No periprandial drinking was observed. Ambulation increased during feeding. The effect on feeding was attenuated when brain histamine was normally low during the early portion of the dark phase, or was decreased by α-fluoromethylhistidine. Hypothalamic neuronal histamine may suppress food intake through H1-receptors, and diurnal fluctuations of food intake may mirror neuronal histamine levels.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 46 (1990), S. 283-285 
    ISSN: 1420-9071
    Keywords: Histamine ; hypothalamus ; environmental temperature ; adaptive behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Histamine content in the rat hypothalamus was lower at 4°C and higher at 31°C compared to that at 21°C. Pretreatment with α-fluoromethylhistidine, a ‘suicide’ inhibitor of histidine decarboxylase, attenuated both the increased level of hypothalamic histamine and rat adaptive behavior at 31°C. Increase of histamine content in the hypothalamus appears to be an important factor contributing to rat adaptive behavior to high environmental temperature.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Biology and fertility of soils 9 (1990), S. 301-305 
    ISSN: 1432-0789
    Keywords: Cellulose decomposition ; H2 transfer ; Microbial biomass ; Microbial succession ; Community structure ; Wetland rice soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The development of a microbial community on cellulose (cellophane film and filter paper) buried in waterlogged soil was observed under a microscope. Throughout the decomposition of the cellulose, the biomass, immobilized N, ATP and gas metabolism of the microbial community were examined. As cellulose decomposition progressed, a microbial succession was recognized. This succession was divided into two stages. In the first stage, a few types of cellulolytic microorganisms predominated on the cellulose. Vigorous decomposition of the cellulose was accompanied by a rapid increase in microbial biomass, and H2 was evolved from the microbial community on the cellulose. In the second stage, the rate of cellulose decomposition was slow. The cellulose remaining was thickly covered with various types of microoganisms. The H2 produced was consumed by the microorganisms closely adhering to the remaining cellulose. In addition, non-cellular organic N accumulated on the remaining cellulose. A large part of the microorganisms seemed to be dormant in this stage. The trends in this microbial succession were similar to those found in ecosystem successions.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 64 (1982), S. 159-166 
    ISSN: 0942-0940
    Keywords: Hydrocephalus ; subdural hygroma ; subduroperitoneal shunt ; ventriculoperitoneal shunt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Three cases with unusual complications of shunting procedures are reported. These were migration of the peritoneal catheter into the mediastinum following an operation for a ventriculoperitoneal (VP) shunt, extrusion of the peritoneal catheter through a well-healed abdominal incision in an adult following a VP shunt operation, and migration of the subdural catheter into the brain substance causing increased intracranial pressure following a subduroperitoneal shunt operation. The possible mechanisms leading to the two migrations and the extrusion are discussed.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 79 (1986), S. 94-99 
    ISSN: 0942-0940
    Keywords: Cerebral angiography ; intracranial aneurysm ; polycystic kidney disease ; unruptured aneurysm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To detect unruptured intracranial aneurysms, we performed cerebral angiography in five patients with polycystic kidney disease (PKD) who had no neurological deficits and no history of subarachnoid haemorrhage. Three of the five patients had unruptured intracranial aneurysms and two underwent surgery with no mortality or morbidity. Our review of the literature revealed that the surgical risk of unruptured intracranial aneurysms is smaller than the risk of bleeding in conservatively treated patients. We discuss the importance of an early diagnosis, and early operation for unruptured aneurysms in patients with polycystic kidney disease and stress the need for intensive care for their renal dysfunction and hypertension during and after the operation.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 71 (1984), S. 55-68 
    ISSN: 0942-0940
    Keywords: CT scan ; Stereotactic thalamotomy ; biopsy ; depth recording ; craniometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A Stereotactic method to visualize deep subcortical structures through which the electrode would pass intraoperatively is described in detail. The procedures are: 1) Approximation of the tentative target point in the lateral craniogram according to some craniometric data. 2) Determination of the invading route and its transfer to the patient's scalp. 3) CT scanning by a new generation scanner to distinguish between gray and white matter along the predetermined plane. 4) Intraoperative adjustment of the electrode to the predetermined CT image and error correction. 5) Verification by recording electrical activities in subcortical tissue. This simple method would be of great benefit for the accurate and safe performance of Stereotactic thalamotomy and biopsy.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 264-268 (Feb. 1998), p. 1129-1132 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 327-328 (Jan. 2000), p. 259-262 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The magnetic properties of the intermetallic compounds Gd1−x YxMn2Ge2 (0≤x≤0.5) (tetragonal crystal structure of the type ThCr2Ge2) have been measured in fields up to 40 T in the temperature range 4.2–120 K on free powders (whose particles are free to rotate in a magnetic field), fixed powders, and polycrystalline bulk samples. The temperature dependence of the crystal structure parameters of some of these intermetallic compounds was determined from x-ray diffraction measurements. It was found that the temperatures of magnetic disordering of the gadolinium magnetic subsystem and the transition of the manganese subsystem from the ferromagnetic to the antiferromagnetic state decrease as the gadolinium content is decreased, so that in compositions with x〈0.3 this transition is a first-order phase transition, and with further decrease of the gadolinium content it becomes second-order. In intermetallic compounds of this system with x=0.3 and 0.4 another spontaneous first-order transition is observed at lower temperatures. In a magnetic field the magnetization of all the investigated intermetallic compounds except for the composition x=0.5 undergo a metamagnetic transition. The T-x, H-x, and H-T magnetic phase diagrams are constructed. The experimental data are interpreted with allowance for the fact that according to the results of previous studies, the Mn-Mn exchange interaction is antiferromagnetic, and thus the examined intermetallic compounds are two-sublattice ferrimagnets with negative exchange interaction in one of the sublattices. Calculations performed within the framework of this model in the Yafet-Kittel approximation, which assumes that the sublattice with negative exchange can be divided into two sub-sublattices, permit a quantitative description of the experimental results in most cases.
    Type of Medium: Electronic Resource
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