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  • 1
    Electronic Resource
    Electronic Resource
    Visual versus Auditory Memory Stimulation in Patients with Probable Alzheimer's Disease A PET Study with 18 FDG (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 777 (1996), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Notes: Patients with probable Alzheimer's disease were either stimulated with a continuous visual recognition task (n = 18) or with a continuous auditory recognition task during PET measurement with 18 FDG. The PET scanner was a Siemens CTI, ECAT EXACT with 5 mm transaxial and 6 mm axial resolution. The global stimulation effects were nearly identical in both groups and increased of 4.17 ± 8.14% in the auditory stimulated group and of 4.03 ± 11.78% in the visual stimulated group. Beyond regional stimulation effects in both groups a common cerebellar stimulation effect was measured. It is concluded that the cerebellar stimulation effect reflects a modality independent cognitive process and that the only small enhancement of global glucose metabolism indicates disturbed stimuli processes and finally explained the patient's failure in memory tasks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1996.tb34424.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The Effect of the “D” Genome from Synthetic Wheat Lines in Anther Culture Responses (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 112 (1994), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Synthetic lines of wheat were compared in order to determine the effect of the “D” genome on embryo induction and plant regeneration from anther culture. The experiments were performed using 6 genotypes of wheat in a randomized block design with 4 replications.In all cases except one, addition of the “D” genome from T. tauschii increased the efficiency of embryo formation and green plantlet production. This positive effect of the “D” genome does not exclude the existence of possible interactions between the three genomes (A, B and D) and/or the effect of each genome separately.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1994.tb01279.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    FDG- and Dopa-PET in postencephalitic parkinsonism (2000)
    Springer
    Journal of neural transmission 107 (2000), S. 1289-1295 
    Details
    ISSN: 1435-1463
    Keywords: Keywords: Viral encephalitis, encephalitis lethargica, postencephalitic parkinsonism, influenza A, positron emission tomography.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary. We report a case of a 74-year old woman who following an acute virus encephalitis developed an akinetic-rigid Parkinson syndrome with tremor, hypokinesia, hypomimia, rigidity and cogwheel phenomenon in all four extremities, brady-dysdiadochokinesia as well as myoclonic jerks of the arms. Many of the clinical features of this postencephalitic parkinsonism (PEP) suggested the diagnosis of sporadic encephalitis lethargica, first described by von Economo 1917. Cerebral spinal fluid showed signs of a viral encephalitis, and a positive influenza A IgA-antibody titer (1 : 〉160) in the viral serologic screen was found. Positron emission tomography (PET) showed an altered pattern of glucose- and dopa-metabolism clearly different from findings in idiopathic Parkinson syndrome (IPS). The acute lack of inhibitory input from the substantia nigra pars compacta to the striatum could explain the different metabolic patterns in our case in comparison to IPS patients. Our findings indicate that PEP may also be caused by influenza A and furthermore that PET clearly distinguishes PEP from IPS.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007020070018
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  • 4
    Electronic Resource
    Electronic Resource
    Test cells for the investigation of battery reactions at high internal pressures (1999)
    Springer
    Journal of applied electrochemistry 29 (1999), S. 421-428 
    Details
    ISSN: 1572-8838
    Keywords: cell reversal ; gas evolution ; monocell batteries ; overcharging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Beginning with a construction based on a C-size (LR-14) battery container ('can'), encased in a strong PMMA-support and fitted with a removable cell top equipped with a manometer and a gas-outlet valve, a second and, finally, a more refined third generation cell was developed. The final (3rd generation) design provides additional options for experimental work. For example, the system can be flushed with inert gas; a regulating gas-flow valve has been fitted to feed precisely a gas chromatograph with the gaseous reaction products and a reference electrode to measure anode and cathode potentials individually has also been incorporated. Since AA cells (LR-6) are the dominant monocell battery size, test cells of the second generation were fitted with an adapter to accomodate either a C- or an AA-size. However, the most recent system was designed exclusively for AA-sized cans. The different cell designs are described and examples of their practical application (e.g., overcharge experiments) are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003455721233
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  • 5
    Electronic Resource
    Electronic Resource
    Influence of genotype and culture conditions on the production of embryos from anthers of tetraploid wheat (Triticum turgidum) (1992)
    Springer
    Euphytica 65 (1992), S. 81-85 
    Details
    ISSN: 1573-5060
    Keywords: androgenesis ; embryo formation ; genetic effect ; tetraploid wheat ; Triticum turgidum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Anther culture of 10 tetraploid wheat (Triticum turgidum) genotypes and two backcross lines representing a wide range of genetic variation was studied in a randomized block design with three replications. Each replication consisted of 2 pots with 3 plants. The day length was 16h and temperature 25° C/15°C for day/night in a controlled greenhouse where the anther donor plants were grown. Two different treatments were used for anther culture. The first one was potato 2 medium (Chuang et al., 1978) modified by adding 0.5 mg/l glutamine and solidified by gelrite (4g/l) (Henry & De Buyser, 1981). Cultures were incubated in light (15 μ E m−2 S−1) at 26°C at 16h day length. The second medium was described by Fadel & Wenzel (1990), differing from the first by the nature of the sugar (maltose) and consistency of the medium (semiliquid by ficoll). Anther cultures were incubated in the dark at 28°C. The study of about 1300 anthers per genotype and treatment showed that both genotype and treatment affected embryo formation of tetraploid wheat. The backcross lines exhibited significant differences for androgenic abilities when compared to their common parent. Most of the genotypes were medium dependent for androgenesis and revealed significant interactions with the two treatments. Five green plantlets were regenerated and fertile doubled haploid plants were obtained from three out of the 12 studied genotypes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00022568
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    Paper (German National Licenses)
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