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  • 1
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0428
    Keywords: Rat ; islet cell surface antigen ; immunobeads ; patch and cap formation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Antigens on the rat pancreatic islet cell surface were redistributed into patch and cap formation when the cells were incubated in the presence of the phosphodiesterase inhibitor, 3-isobutyl-1-methylxanthine, in tissue culture medium 199 for 24 h, before addition of rat pancreatic islet cell surface antibody. In contrast, if the cells were cultured in tissue culture medium 199 supplemented with glucose (5.5 or 16.7mmol/l) and 10% heat-inactivated fetal calf serum without 3-isobutyl-1-methylxanthine, cap formation was not detectable. These results suggest that mobile antigen on the surface of pancreatic B cells can be induced to aggregate into patch and cap formations during conditions of increased cellular metabolism.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 105 (1990), S. 30-34 
    ISSN: 0942-0940
    Keywords: Cerebral blood flow ; moyamoya disease ; internal carotid artery occlusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A study has been made of the cerebral blood flow (CBF) in moyamoya disease from the perspective of hemispheric cerebral blood flow and regional CBF (rCBF). The material includes 21 children between the ages of 5 and 15 years with moyamoya disease, and 19 adult moyamoya cases-all of which had virtually no neurological symptoms at the time of the study. CBF was measured using the133Xe intravenous injection method. Comparsion was made with the measurements from 16 normal children and 14 normal adults. Study was also made of the relationship between the angiographic stage of the disease and the CBF. With the exception of the more elderly patients, CBF was found to be significantly lower in the moyamoya cases than in normal subjects of the same age group. In all age groups, the distribution of rCBF showed a dominant posterior distribution, dissimilar to the dominant anterior distribution found in the normals. Among the juvenile moyamoya cases, there was a tendency toward decreasing hemispheric blood flow together with advancing disease-as determined angiographically. Moreover, with advancing stages of the disease, there was a continuing transition from the normal pattern of frontal dominance to one of occipital dominance. This dominance of posterior rCBF is thought to be a characteristic feature of moyamoya disease.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 112 (1991), S. 13-18 
    ISSN: 0942-0940
    Keywords: Cerebral ischaemia ; vertebral artery reconstruction ; vertebral to subclavian transposition ; vertebrobasilar insufficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary For vascular reconstruction in cases of atherosclerotic stenosis at the origin of the vertebral artery, we use vertebral to subclavian artery transposition. We discuss the advantages and effectiveness of such treatment based on a study of 32 cases. We have experienced neither surgical mortality nor morbidity and the outcome at the time of discharge has been favourable. Follow-up revealed no deaths, however, three cases exhibited symptoms of cerebral ischaemia. One had a supratentorial completed stroke, and the other two hat TIA or RIND, but without any notable lesion in the angiograms. There were no cases of cerebral infarction of the posterior fossa. We believe that this method should be the first choice for treatment of cases without lesions of the subclavian artery for the following reasons: serious operative complications have not been encountered, surgical invasion is minimal, temporary occlusion of the common carotid artery is unnecessary, the operation can be done by occluding only the vertebral artery, and unlike various bypass operations, anastomosis is required at only one location and is consequently technically uncomplicated. Following anastomosis the cerebral blood pathway is physiological.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The distribution and abundance of Japanese common squid [Todarodes pacificus (Steenstrup, 1880)] paralarvae off southern Kyushu Island near the Kuroshio were examined in relation to water types in the region. Surveys were conducted in 1996 and 1997 using paired, 70 cm diameter Bongo nets. Temperature–salinity plots from 0, 50 and 100 m depths were used to assign sampling stations to three water types: inshore, mixing and Kuroshio. In total, 4103 T. pacificus paralarvae were collected at 59 of 72 stations. Catch densities at positive stations ranged between 8 and 4282 ind./50 m2 sea surface area. Catches during both years were highest in mixing waters, followed by inshore and Kuroshio waters. Total catches were highest just north of the oceanographic front at the inshore edge of the Kuroshio and declined with increasing distance away from the front. Catches of paralarvae ≤1.0 mm mantle length also peaked near the front. In both years, ≥85% of all paralarvae and ≥69% of those ≤1.0 mm mantle length occurred less than 25 km from the front. We conclude that most spawning off southwest Kyushu occurs near the frontal zone, where Kuroshio and inshore waters meet.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 52 (June 2008), p. 145-154 
    ISSN: 1662-8985
    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
    Notes: The Compton profile, projection of electron momentum density distribution along the scatteringvector, is very sensitive to the behavior of valence electrons in a variety of materials. In this papertheoretical aspects related to measurement of spin momentum densities of magnetic materials usingCompton scattering is reviewed. To highlight the potential of the magnetic Compton scattering, thespin momentum densities in Ni-Mn-Ga Heusler alloys at various temperatures and magnetic fieldsare presented. The magnetic Compton profiles are mainly analyzed in terms of the contributionfrom the 3d electrons of Mn. A comparison of the magnetic Compton data with other magnetizationstudies illustrates its importance in exploring the magnetic effects in ferro- or ferri-magneticmaterials
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 52 (June 2008), p. 181-186 
    ISSN: 1662-8985
    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
    Notes: We present the first ever theoretical and experimental charge Compton profiles of Ni2MnGaHeusler alloy. The measurements have been made using magnetic Compton spectrometer atSPring8, Japan. The Compton profiles and energy bands have been computed using Hartree-Fock,density functional theory with local density and generalized gradient approximations. It is seen thatthe Hartree-Fock based Compton profile is relatively in better agreement with the experimentalprofiles. In addition, we also report the energy bands, density of states and valence charge densitiesusing full potential linearized augmented plane-wave method
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 112 (1991), S. 100-105 
    ISSN: 0942-0940
    Keywords: Progressing stroke ; cerebral infarction ; acute stage vascular operation ; bypass ; brain protecting substance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The effectiveness of acute stage vascular reconstruction in cases of progressing stroke is reported. The clinical material consists of 28 cases of progressing stroke in the anterior circulation upon which vascular reconstruction was performed. Following admission, brain protective substances (500 ml mannitol, 500 mg vitamin E, 500 mg phenytoin) and dextran, were administered to the patients, and induced hypertension was also performed. Changes in symptoms were then observed and vascular reconstruction was carried out in cases where symptoms progressed. The vascular lesion was on the internal carotid artery in 8 cases and on the middle cerebral artery in 20 cases. Complete disappearance of neurological symptoms was obtained in 12 cases, whereas only mild neurological symptoms remained but a return to normal social life was possible in 11 other cases. Symptoms remained in three cases and there were two fatalities. In a long-term follow-up study, there were no cases of aggravation of symptoms due to ischaemic stroke. Moreover, the reconstruction was judged as effective on the basis of cerebral blood flow and metabolism. We concluded that acute vascular reconstruction for progressing stroke under the administration of brain protective substances is effective in preventing the progression of neurological symptoms.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 0942-0940
    Keywords: Cerebral aneurysm ; subarachnoid haemorrhage ; vasospasm ; computed tomography ; Hounsfield number
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We have studied the correlations between computed tomograms (CT), clinical severity at the time of onset, and subsequent development of cerebral infarction due to vasospasm in 32 cases with subarachnoid haemorrhage secondary to rupture of cerebral aneurysms. It was found that the clinical severity could be judged by CT as shown by the amount of blood in subarachnoid space. Furthermore, it was possible to predict the subsequent occurrence of cerebral infarction by sequential findings of CT. A Hounsfield number of the high density area over 60 showed good correlation with the development of cerebral infarction.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 0942-0940
    Keywords: Subarachnoid haemorrhage ; leptomeningeal cells ; arachnoid granulations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Subarachnoid haemorrhage (SAH) often leads to subarachnoid fibrosis and resultant normal pressure hydrocephalus; however, how subarachnoid fibrosis occurs is unknown. We examined the changes within arachnoid granulations (AGs) and the subarachnoid space (SAS) chronologically at the parasagittal region obtained from patients with SAH at autopsy and made comparison with controls by immunostaining for cytokeratin, specific marker for leptomeningeal cells and by the elastica Masson-Goldner methods. Within a week some AGs were torn, and many inflammatory cells filled the AGs and SAS. Cytokeratin positive cells were scarce. During the next two weeks cytokeratin positive cells increased. After three weeks, AGs and SAS were filled by dense deposits of extracellular matrices surrounded by multiple layers of leptomeningeal cells.
    Type of Medium: Electronic Resource
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