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  • 1
    ISSN: 1432-0428
    Keywords: Keywords Type I (insulin-dependent) diabetes mellitus ; acute-phase response ; C-reactive protein ; atherosclerosis ; inflammation ; vascular disease ; α1-acid glycoprotein ; fucosylation.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Moderately increased plasma concentrations of C-reactive protein are associated with an increased risk of cardiovascular disease. C-reactive protein, its relation to a low degree of inflammatory activation and its association with activation of the endothelium have not been systematically investigated in Type I (insulin-dependent) diabetes mellitus. C-reactive protein concentrations were measured in 40 non-smoking patients with Type I diabetes without symptoms of macrovascular disease and in healthy control subjects, and in a second group of Type I diabetic patients (n = 60) with normo- (n = 20), micro- (n = 20) or macroalbuminuria (n = 20). Differences in glycosylation of α1-acid glycoprotein were assayed by crossed affinity immunoelectrophoresis. Activation of the endothelium was measured with plasma concentrations of endothelial cell markers. The median plasma concentration of C-reactive protein was higher in Type I diabetic patients compared with healthy control subjects [1.20 (0.06–21.64) vs 0.51 (0.04–9.44) mg/l; p 〈 0.02]. The Type I diabetic subjects had a significantly increased relative amount of fucosylated α1-acid glycoprotein (79 ± 12 % vs 69 ± 14 % in the healthy control subjects; p 〈 0.005), indicating a chronic hepatic inflammatory response. In the Type I diabetic group, log(C-reactive protein) correlated significantly with von Willebrand factor (r = 0.439, p 〈 0.005) and vascular cell adhesion molecule-1 (r = 0.384, p 〈 0.02), but not with sE-selectin (r = 0.008, p = 0.96). In the second group of Type I diabetic patients, increased urinary albumin excretion was associated with a significant increase of von Willebrand factor (p 〈 0.0005) and C-reactive protein (p = 0.003), which were strongly correlated (r = 0.53, p 〈 0.0005). Plasma concentrations of C-reactive protein were higher in Type I diabetic patients without (clinical) macroangiopathy than in control subjects, probably due to a chronic hepatic inflammatory response. The correlation of C-reactive protein with markers of endothelial dysfunction suggests a relation between activation of the endothelium and chronic inflammation. [Diabetologia (1999) 42: 351–357]
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Sedimentary DNA, RNA and ATP concentrations were measured at six stations on a tidal flat in the German Wadden Sea from April to December 1995 to determine factors controlling microbial abundance and activity. Two stations (1 and 2) were located in a mussel bed (Mytilus edulis) in the middle of the flat, and the other four were arranged in a line following ebb tide direction. DNA and ATP concentrations were converted into carbon equivalents using literature coefficients and considered to represent total microbial biomass and viable microbial biomass, respectively. The difference between CDNA and CATP was considered as detrital biomass. CDNA and detrital CDNA biomass both increased from spring to summer and decreased in autumn to reach lowest values in December. The most prominent seasonal increase was observed at the mussel bed stations and two adjacent stations. CATP biomass peaked in early spring, especially at the mussel bed stations, and showed a secondary peak in summer. Regression analysis yielded a highly significant relation between the silt content of the sediment and CDNA and CATP. However, CDNA and CATP biomass are not correlated if silt is taken into account. The relation between silt and microbial biomass in combination with the decrease of the silt content with distance from the mussel bed indicate the importance of mussel beds for the microbial activity on the tidal flat, most likely through deposition of feces and pseudofeces. The low silt content and microbial biomass in winter are attributed to resuspension events. The zero intercepts of the regressions between DNA and ATP or RNA suggest that extracellular DNA is absent in our samples. Hence, detrital CDNA biomass in our samples probably consists of intact but dormant cells. Compared to other marine habitats the percentage of detrital CDNA biomass on the tidal flat is quite high, i.e. up to 〉95% of the total CDNA. However some doubt is expressed about the validity of factors used to convert ATP and DNA to carbon. The proportion of active biomass, expressed by the ratio CATP/CDNA being the complement of the detrital CDNA percentage shows a steady decrease with time and with diminishing distance towards the mussel beds. The role of a mussel bed as a biosedimentary system influencing spatial and temporal trends in specific activity is discussed.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1459
    Keywords: Key words Multiple sclerosis ; Periventricular lesions ; Callosal ; atrophy ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In multiple sclerosis (MS), periventricular lesions produce atrophy of the corpus callosum (CC), as evidenced by magnetic resonance imaging (MRI). We investigated whether CC atrophy in relapsing-remitting MS patients is related to functional deficits. We compared 14 mildly disabled (mean Expanded Disability Status Scale score 2.7) relapsing-remitting MS patients with 14 age- und sex-matched controls. CC size was determined using sagittal T1-weighted MRI. The function of the CC was studied using a neuropsychological battery and neurophysiological evaluation based on visual stimulation using a divided visual field paradigm. The total area of the CC in patients (mean 5.3cm2) was significantly (P=0.002) smaller than in controls (mean 6.6cm2). Patients showed left ear extinction using the dichotic listening test and impaired name learning, which was correlated with atrophy of the splenium. There were no differences in interhemispheric transfer time between patients and controls. Marked atrophy of the CC can be encountered in relapsing-remitting MS patients. The associated cerebral disconnection correlated with atrophy of expected regions of the CC, thus supporting topographical organization.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0942-0940
    Keywords: Keywords: Spinal arachnoiditis; subarachnoid haemorrhage; magnetic resonance imaging; review.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary  Two patients with spinal arachnoiditis following subarachnoid haemorrhage are described. A complete spinal block was seen at the mid thoracic level with characteristics of spinal arachnoiditis. Only one patient had severe symptoms. Both patients were treated conservatively. Signs and symptoms diminished in time. A review of the literature is given and the aetiology is discussed.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Psychophysiology 22 (1985), S. 0 
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: The present study reports the results of an experiment in which subjects were instructed to indicate whether letter-pairs that were randomly presented in the center and peripheral (left and right) visual fields were semantically same or different. Letter-pairs could be either intact or perceptually degraded, and all subjects participated in 3 consecutive sessions of the experiment. The results showed that event-related-potential (ERP) components were strongly affected by the visual field of presentation of stimuli. Center field stimuli elicited late positive components (P630, SW) of larger amplitude than peripheral field stimuli, at all electrode locations. At lateral electrode sites, N200 components were always larger (more negative), and late positive components were consistently smaller (less positive) to contralaterally than ipsilaterally presented stimuli. However, the contralateral negativity of N200 was much larger over the right than left regions of the scalp, while positive ERP components showed a more symmetrical distribution of the contra- vs. ipsilateral stimulation effect. These results are discussed in relationship to cognitive aspects of information processing, as well as the neural origin of endogenous ERP components.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Psychophysiology 23 (1986), S. 0 
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Event-related potentials (ERPs) were recorded from subjects reacting to visual stimuli (pictures or words) presented in the left and right visual fields. Subjects were instructed to match these stimuli on the basis of physical or categorical identity with stimuli of a previously presented memory list. The ERPs elicited by the lateral stimuli consisted of a sequence of topographically and functionally separable, negative and positive components, including N200, P300, N540, P720, and SW. On left and right hemispheric locations N200 was consistently larger, and P720 consistently smaller to stimuli presented in the contralateral fields than to stimuli presented in the ipsilateral fields. In addition, the amplitude of P720 to ipsilaterally presented stimuli showed a marked variation in amplitude as a function of stimulus type, level of practice, and the hemispheric site of measurement, while contralaterally presented stimuli produced only minimal variation in P720 amplitude. The latter results are discussed in relation to possible intracranial sources and the functional significance of the P3 component elicited by laterally presented stimuli.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Psychophysiology 22 (1985), S. 0 
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: An experiment is described in which event-related potentials (ERPs) of a group of young children were compared with ERPs of a group of young adults. Both groups were required to perform a simple word-reading task and a picture-recognition task. Principal components analyses (PCAs) were performed on the averaged ERPs in two different ways: a) separately for each of four combinations of tasks and age groups, and b) separately for each age group (pooled across tasks). The results demonstrated that ERP components of children and adults differed both qualitatively and quantitatively. First, children's ERPs were characterized by a long-latency negative component (N500) and a slow positive wave (SW) component, and adults’ ERPs were characterized by two late positive components (P340 and SW respectively). Second, both children and adults showed an earlier positive component that varied in peak latency between 280 ms for children and 240 ms for adults. In addition, adults showed a marked increase in SW positivity in the word-reading task as compared with the picture-recognition task, while task effects were less manifest in the components of children. These results support the notion that children and adults differed both in speed as well as in their mode of processing under the different task requirements.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Psychophysiology 21 (1984), S. 0 
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Two experiments are described in which subjects were requested to recall dichotic digit pairs. The results of both experiments showed a significant right ear advantage for the digits. In the EEG a strongly lateralized sustained positive wave was present in the pre-response period. The asymmetry of this component appeared to be both task dependent, and related to individual differences in ear asymmetry. It is suggested that the sustained wave is a manifestation of differential mobilization of resources of the two hemispheres that compete for limited capacity in a particular stage of the task.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 24 (1966), S. 616-621 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Current Opinion in Structural Biology 2 (1992), S. 877-887 
    ISSN: 0959-440X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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