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  • 1
    Electronic Resource
    Electronic Resource
    Xanthogranulomatous colloid cyst of the third ventricle (1985)
    Springer
    Acta neuropathologica 66 (1985), S. 343-346 
    Details
    ISSN: 1432-0533
    Keywords: Colloid cyst ; Third ventricle ; Xanthogranuloma ; Choroid plexus ; Ependyma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary This is a case report of a xanthogranulomatous colloid cyst of the 3rd ventricle. Posible etiologies for this rare entiry, along with the clinical problems that may be associated with it, and the differential diagnosis are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00690969
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  • 2
    Electronic Resource
    Electronic Resource
    Brain lesions in chronic granulomatous disease (1991)
    Springer
    Acta neuropathologica 81 (1991), S. 467-470 
    Details
    ISSN: 1432-0533
    Keywords: Chronic granulomatous disease ; White matter lesions ; Pigmented macrophages ; Lipofuscin ; Sulfur
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In chronic granulomatous disease (CGD) enzyme-deficient neutrophils and mononuclear cells lack the respiratory brust required for biocidal activity. Recurrent infections lead to granulomas in various organs but brain lesions are rare. In the present case, a 23-year-old male with numerous infections since early childhood died of overwhelming pulmonary aspergillosis. He first began to experience neurological deficits at the age of 17. Computerized tomography and magnetic rsonance imaging revealed fleeting white matter lesions that were interpreted as multiple sclerosis (MS). At post mortem, three types of brain lesions were found: (1) Pigmented macrophages in perivascular spaces and the leptomeninges similar to those reported previously. They contained fine, golden-brown, lipofuscin-like material whose chemical composition included a sulfur peak by X-ray analysis. (2) Focal, well-demarcated, “burnt out” white matter lesions with loss of both myelin and axons and intense sclerosis. (3) Diffuse areas of mild pallor in the centrum ovale which spared the U fibers. The pigmented macrophages are characteristic of those seen in the periphery in CGD. The origin of the discrete, destructive white matter lesions is unclear. They may have resulted from: (i) earlier activity by CGD macrophages; (ii) previous infections due to sepsis or embolism; or (iii) possibly post-infectious encephalomyelitis. The more diffuse, mild, white matter lesions are attributed to edema. Evidence for MS, progressive multifocal leukoencephalopathy, or human immunodeficiency virus encephalitis was lacking. This case is presented to alert us to look more carefully for brain lesions in CGD, characterize them and to help determine their cause.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00293469
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  • 3
    Electronic Resource
    Electronic Resource
    Neurofibrillary pathology in progressive supranuclear palsy (1980)
    Springer
    Acta neuropathologica 52 (1980), S. 73-76 
    Details
    ISSN: 1432-0533
    Keywords: Progressive supranuclear palsy ; Alzheimer's disease ; Neurofbirillary tangles ; Paired helical filaments ; Twisted tubules
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We describe the fine structure of the subcortical neurofibrillary tangles (NFT) in 2 cases of progressive supranuclear palsy (PSP). In case 1 (69-year-old man) about one half of the NFT in the midbrain and pons examined were composed of 13–16 nm straight filaments and the others were made up of paired helical filaments (PHF) of Alzheimer type. The NFT in case 2 consisted of straight tubules with infrequent segments of unusual twisted fibril of unknown nature. The simultaneous occurrence of straight and PHF in one of these cases suggests that the NFT in PSP may be similar to those of Alzheimer type occurring in various conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00687231
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  • 4
    Electronic Resource
    Electronic Resource
    Coiled nucleocapsid configuration in subacute sclerosing panencephalitis (SSPE) (1972)
    Springer
    Acta neuropathologica 21 (1972), S. 263-271 
    Details
    ISSN: 1432-0533
    Keywords: Subacute Sclerosing Panencephalitis ; Electron Microscopy ; Nuclear Bodies ; Tubular Inclusions ; Nucleocapsids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In this case of documented subacute sclerosing panencephalitis (SSPE), electron microscopy of a brain biopsy revealed a previously unreported “fingerprint” configuration of tubular inclusions or nucleocapsids. The pattern resembled that of the whorled filamentous nuclear bodies which are so frequently encountered in ultrastructural studies of this disease. Furthermore, an apparent tubule was seen running parallel to filaments within the nucleus of still another affected cell. These findings lend support to the concept that nuclear bodies are converted into and/or synthesize nucleocapsids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00685134
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  • 5
    Electronic Resource
    Electronic Resource
    Waterborne chemical compounds in tropical macroalgae: positive and negative cues for larval settlement (1996)
    Springer
    Marine biology 126 (1996), S. 383-393 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Settlement sites of marine invertebrate larvae are frequently influenced by positive or negative cues, many of which are chemical in nature. Following from the observation that many shallow-water, Hawai'ian marine macroalgae are free of fouling by sessile invertebrates, we predicted that the algae are chemically protected and dependent on either surface-bound or continuously released soluble compounds to deter settling invertebrate larvae. To address the importance of waterborne algal compounds, we experimentally determined whether larvae of two of Hawai'i's dominant hard-surface fouling organisms, the polychaete tube worm Hydroides elegans and the bryozoan Bugula neritina, would settle in the presence of waters conditioned by 12 species of common Hawai'ian macroalgae (representing the Phaeophyta, Chlorophyta, Rhodophyta and Cyanophyta). The results included a full spectrum of biological responses by each larval species to waterborne algal compounds. Larval responses to conditioned water were consistent for each algal species, but the outcomes were not predictable based on the taxonomic relationships of the algae. For example, among the species of Phaeophyta examined, different conditioned waters were: (1) toxic, (2) inhibited settlement, (3) simulated settlement, or (4) had no effect, compared to larvae in control dishes containing filtered seawater. Additionally, larval responses to aged (24 h) conditioned waters could not be predicted from the results of assays run with conditioned waters utilized immediately after preparation. Finally, settlement by larvae of one species did not predict outcomes of tests for the other species. Four of 12 shallow-reef Hawai'ian macroalgae tested released compounds into surrounding waters that immediately killed or inhibited settlement by both H. elegans and B. neritina (toxic: Dictyota sandvicensis; inhibitory: Halimeda discoidea, Sphacelaria tribuloides, Ulva reticulata); the remaining 8 algal species prevented settlement by one of these fouling organisms but for the other had no effect or, in some cases, even stimulated settlement
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00354620
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  • 6
    Electronic Resource
    Electronic Resource
    Ecological and evolutionary significance of pelagic spermatophores of vermetid gastropods (1980)
    Springer
    Marine biology 57 (1980), S. 315-325 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Sperm are disseminated in vermetid gastropods by spermatophores released freely into the ocean. Spermatophores from 7 species of vermetids, including 3 genera, were obtained from reproductively active males or offshore plankton tows or both. Each vermetid spermatophore consists of a sperm mass containing highly ordered eupyrene and apyrene sperm enveloped concentrically by 3 transparent capsules. Generic and specific differences occur in the size, shape and composition of the sperm mass and capsule. The complexly layered spermatophore is assembled in the male reproductive tract, which includes and elaborate set of pallial reproductive glands for capsule production. Spermatophores are liberated by males into the seawater, and there dispersed by water movements. Some of these drifting spermatophores become entangled in the mucous feeding nets of female vermetids and are then activated by feeding movements. Activation of the complex ejaculatory apparatus appears to result from an interplay of osmotic and mechanical mechanisms. Spermatophores remain viable in the laboratory for 12 to 20 h after release from the male; after 20 h, the sperm mass breaks down and the sperm become immotile. Plankton tows capture some spermatophores with motile sperm and others in which sperm are no longer active. Evolutionary implications of the relationship between production of pelagic spermatophores, sessile mode of life and other aspects of vermetid biology are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00387574
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  • 7
    Electronic Resource
    Electronic Resource
    The vermetidae (Mollusca: Gastropoda) of the Hawaiian Islands (1972)
    Springer
    Marine biology 12 (1972), S. 81-98 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The Hawaiian vermetid fauna comprises 8 species, 7 of which are here described as new. The generic distribution includes 5 species of Dendropoma and 1 each of Petaloconchus, Vermetus and Serpulorbis. The species descriptions rely little on conchology, stressing instead descriptions of animals, habitats and reproductive and developmental characteristics. Feeding is accomplished in all species by a combination of mucous nets and detrital collection by ctenidial cilia. Only in the single species of Vermetus, an inhabitant of quiet waters, does ciliary feeding predominate. Four small species of Dendropoma inhabit shallow, coralline algal-encrusted, wave-washed reef areas, while Serpulorbis and Dendropoma platypus are found not only in intertidal areas subjected to heavy surf, but subtidally to depths of 10 m or more. The single species of Petaloconchus is a characteristic associate of the 4 Dendropoma spp. of shallow waters but, being strongly associated with the coral Porites, Petaloconchus also extends subtidally. The Hawaiian vermetids are very abundant in some localities, with densities ranging up to 60,000/m3 in one species of Dendropoma. Reproduction is continuous in all Hawaiian vermetids, most of which produce small hatching juveniles rather than swimming veligers. Only Serpulorbis and Vermetus have obligatory planktonic stages. Petaloconchus and Dendropoma species may produce a mixture of hatching juveniles and short-term planktonic veligers. Larval or juvenile size is correlated with available nurse yolk, not with egg size.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00347431
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  • 8
    Electronic Resource
    Electronic Resource
    Planctosphaera (Hemichordata: Enteropneusta) in the Pacific Ocean (1983)
    Springer
    Marine biology 73 (1983), S. 151-153 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Four specimens of the unusual hemichordate larva Planctosphaera sp., previously known only from the North Atlantic Ocean were collected by midwater trawl from depths of 75 to 500 m near the Hawaiian Islands in May 1974 and in September 1977 and 1982. The anatomy of the Pacific specimens is indistinguishable from published descriptions of those from the Atlantic. The distribution of known specimens of planctosphaera in subsurface or deeper waters in both major ocean systems of the world suggests that they are larvae of a widely distributed species, perhaps from abyssal depths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406882
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  • 9
    Electronic Resource
    Electronic Resource
    Role of bacteria in larval settlement and metamorphosis of the polychaete Hydroides elegans (1999)
    Springer
    Marine biology 133 (1999), S. 55-64 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The serpulid polychaete Hydroides elegans Haswell, 1883 is an early colonist of new substrata in Pearl Harbor, Oahu, Hawaii. When metamorphically competent, larvae of H. elegans will settle rapidly upon an acceptably biofilmed surface, but not on a clean surface. In this study we found the ability of larvae to respond selectively to inductive surfaces to be retained for at least 3 wk. Of a series of bacterial strains isolated from Hawaiian marine biofilms, 13 induced larval settlement, 11 gave moderate or mixed results, and 10 others did not stimulate the settlement of H. elegans. The amount of settlement induced by monospecific strains was rarely as great as with natural, multispecies films. Most of the isolated bacteria were motile Gram-negative rods, but Gram-positive strains were also present, and diverse metabolic types were represented in the study. Biofilms killed by treatment with heat, ultraviolet radiation or chemical fixatives were no longer inductive. Soluble, dialyzable, heat-stable bacterial products induced settlement and metamorphosis more slowly. The range of bacteria producing an inductive signal suggests either that there are multiple cues, or that the cue is common to many bacteria. Chemical signals characteristic of early microbial biofilms may indicate freshly available substrata with optimal potential for the growth and survival of H. elegans.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002270050442
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  • 10
    Electronic Resource
    Electronic Resource
    THE ISOLATION AND LIPID COMPOSITION OF MYELIN-FREE AXONS FROM RAT CNS (1976)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 26 (1976), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: —Myelin-free axons were isolated from rat CNS using a modification of the method of De Vrieset al. (1972). On a dry weight basis, the axons contained 15·2% lipid composed of 19·4% cholesterol, 56·9% phospholipid and 23·7% galactolipid with a weight ratio of cerebroside to sulfatide of 3·6-1. The phospholipid was composed of 11·0% ethanolamine phosphatides (44·4% in the plasmalogen form), 21·0% choline phosphatides (9·3% in the plasmalogen form), 4·5% sphingomyelin, 4·5% phosphatidyl serine, 4·3% phosphatidyl inositol, 3·0% diphosphatidyl glycerol and 8·5% unidentified phospholipid. The rat axons contained 0·18 μg ganglioside NeuNAc/mg dry wt. In addition to the 4 major brain gangliosides, the rat axons contained gangliosides GD2 and GD3. The axonal galactolipid could not be accounted for by myelin contamination as revealed by electron microscopy, absence of the characteristic ratio of myelin specific proteins in the axonal protein profile as shown by polyacrylamide gel electrophoresis, and the axonal level of the myelin marker enzyme 2′,3′-cyclic nucleotide-3′-phosphohydrolase. The relationship between lipids of axons isolated from rat and bovine CNS, and rat whole brain and CNS myelin is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1976.tb04443.x-i1
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