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  • 1
    Electronic Resource
    Electronic Resource
    Early Viral Proteins As Autoantigens (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 540 (1988), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1988.tb27206.x
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  • 2
    Electronic Resource
    Electronic Resource
    Radikalische Copolymerisation von p-Chlorstyrol und n-Butylmethacrylat (1986)
    Springer
    Colloid & polymer science 264 (1986), S. 494-497 
    Details
    ISSN: 1435-1536
    Keywords: Radikalische Massecopolymerisation ; Copolymerisationsparameter ; Fineman-Ross ; Kelen-Tüdös ; Run Number
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Abstract The radical copolymerization of p-chlorostyrene (1) with n-butylmethacrylate (2) was studied at low conversions in bulk at 60
    Notes: Zusammenfassung Die Copolymerisation von p-Chlorstyrol (1) mit n-Butylmethacrylat (2) wurde in Masse bei 60
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01422002
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  • 3
    Electronic Resource
    Electronic Resource
    Photoabbau von Polymethylmethacrylat in Lösung (1972)
    Springer
    Colloid & polymer science 250 (1972), S. 142-147 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Summary The photodegradation of poly(methyl methacrylate) and polystyrene in solution is strongly influenced by the interaction polymer-solvent. The rate of degradation for poly(methyl methacrylate) in various solvents decreases in air as well as in nitrogen in the order 1,4-dioxane 〉tetrahydrofuran〉chloroform. For polystyrene another order of influence of the solvents is valid: chloroform≫1,4-dioxane〉tetrahydrofuran=0, whereby the degradation in air is faster than in nitrogen. The influence of retardation of low molecular charge-transfer complexes of maleic anhydride (acceptor) and 1,4-dioxane or tetrahydrofuran (donors) on the photodegradation of poly(methyl methacrylate) is independent on the atmosphere. The same is valid for the influence of the complex of maleic anhydride with poly(ethylene glycol) on the degradation of polystyrene in chloroform. The content of ether oxygen in donor is primary responsible for the measure of the retardation effect of the complex on the degradation of the polymer. For poly(methyl methacrylate) in chloroform with maleic anhydride as acceptor the order of the donor efficiency is as follows: poly(ethylene glycol)〉ethylene glycol monomethyl ether〉ethylene glycol=0. The electron affinity of the acceptor (related to 1,4-dioxane as donor) shares the responsibility for the complex retardation effect on the photodegradation of the polymer.
    Notes: Zusammenfassung Der Photoabbau von Polymethylmethacrylat und Polystyrol in Lösung wird stark durch die Wechsel-wirkung Polymeres-Lösungsmittel beeinflußt. Die Abbaugeschwindigkeit von Polymethylmethacrylat in verschiedenen Lösungsmitteln nimmt in Luft sowie unter Stickstoff in der Reihenfolge 1,4-Dioxan〉Tetrahydrofuran 〉Chloroform ab. Beim Polystyrol ist die Reihenfolge des Lösungsmitteleinflusses anders: Chloroform ≫1,4-Dioxan〉Tetrahydrofuran=0, wobei der Abbau unter Luft schneller als unter Stickstoff verläuft. Der retardierende Einfluß des niedermolekularen Elektronen-Donator-Acceptor-Komplexes aus Maleinsäureanhydrid (Acceptor) und 1,4-Dioxan bzw. Tetrahydrofuran (Donatoren) ist beim Photoabbau von Polymethylmethacrylat unabhängig von der Atmosphäre. Dasselbe gilt für den Einfluß des Komplexes Polyäthylenglycol-Maleinsäureanhydrid auf den Abbau von Polystyrol in Chloroform. Der Äther-Sauerstoffgehalt im Donator ist für das Maß der retardierenden Wirkung des Komplexes auf den Abbau des Polymeren primär verantwortlich. Bei Polymethylmethacrylat in Chloroform mit Malein-säureanhydrid als Acceptor ist die Reihenfolge der Donatoren-Wirksamkeit: Polyäthylenglycol〉Äthy-lenglycolmonomethyläther 〉Äthylenglycol=0. Die Elektronenaffinität der Acceptoren (bezogen auf 1,4-Dioxan als Donator) ist für die retardierende Wirkung des Komplexes auf den Photoabbau des Polymeren mitverantwortlich.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01501280
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  • 4
    Electronic Resource
    Electronic Resource
    Relationship between directed visual attention and saccadic reaction times (1988)
    Springer
    Experimental brain research 73 (1988), S. 546-552 
    Details
    ISSN: 1432-1106
    Keywords: Attention ; Fixation ; Saccades ; Saccadic reaction times
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Saslow (1967) and Fischer and Ramsperger (1984) found that saccadic reaction time (SRT) depends on the interval between the fixation point offset and the target onset. Using a continuously visible fixation point, we asked whether a similar function would be obtained if subjects attended to a peripherally viewed point extinguished at variable intervals before or after the target onset. The interval was varied between -500ms (i.e., attention stimulus offset after saccade target onset = overlap trials) and 500ms (i.e., attention stimulus offset before saccade target onset = gap trials). The results show a constant mean SRT of about 240 ms for overlap trials, and a U-shaped function with a minimum of 140 ms, at a gap duration of 200 ms, for gap trials. These findings suggest that saccadic latencies do not depend on the cessation of fixation per se, but rather on the disengagement of attention from any location in the visual field. The time required for subjects to disengage their attention is approximately 100 ms. This disengaged state of attention — during which short latency (express) saccades can be made — can be sustained only for a gap duration of 300 ms. At longer gap durations mean SRTs increase again.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406613
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  • 5
    Electronic Resource
    Electronic Resource
    Der Einfluß körperlicher Belastung vor und nach Schwimmtraining auf das Leberparenchym und den Serumenzymspiegel bei Ratten (1971)
    Springer
    Pflügers Archiv 328 (1971), S. 292-306 
    Details
    ISSN: 1432-2013
    Keywords: Physical Exercise ; Enzyme Activities ; Liver Alterations ; Microscopic Observations ; Körperliches Training ; Enzymaktivität ; Leberveränderungen ; Mikroskopische Beobachtungen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Licht- und elektronenmikroskopische Längsschnittuntersuchungen des Leberparenchyms untrainierter und trainierter Ratten vor und nach körperlicher Belastung ergaben bei paralleler Bestimmung von verschiedenen Fermentaktivitäten im Serum einen signifikanten Zusammenhang zwischen Training und Leistungssteigerung. Durch die schonende transcutane Leberblindpunktion waren mehrere Versuchsfolgen an ein und demselben Tier möglich. Bei untrainierten Ratten wurden nach Belastung durch den Schwimmtest destruktive Veränderungen des Leberzellgefüges, Umbauvorgänge im Bereich der meta- und paraplasmatischen Substrukturen sowie statistisch gesicherte Abweichungen der Serumenzymspiegel gegenüber 10 Tage vorher ermittelten morphologischen und enzymologischen Normalbefunden beobachtet. Nach einer Trainingsphase von ca. 4 Wochen kam es zu einer Adaptation des Leberstoffwechsels auf den unphysiologischen Belastungsreiz, die sich in einer deutlichen Vermehrung von Zellorganellen (Mitochondrien, Ribosomen) und einer leichten Steigerung der Fermentaktivitäten von Glutamat-Oxalacetat-Transaminase (GOT), Glutamat-Pyruvat-Transaminase (GPT), Lactat-Dehydrogenase (LDH) und Abnahme der Aldolase (ALD) erkennbar machte und dazu führte, daß bei einer weiteren Schwimmbelastung neben einer erheblichen Leistungssteigerung die ohne vorheriges Training beobachteten schweren fermentativen und Leberzellveränderungen nicht mehr auftraten. Ursachen der beschriebenen Reaktionen in den Leberzellen und im enzymatischen Status sowie der Einfluß des Trainings auf den Leberstoffwechsel nach körperlicher Belastung werden diskutiert.
    Notes: Summary Light- and electron-microscopic longitudinal sections of the hepatic tissue of trained and untrained rats before and after physical exercise revealed a significant relationship between training and performance. The same results were found by parallel determination of different enzyme activities. Using an indulgent transcutaneous liver puncture, numerous experiments using the same animal were possible. Untrained rats showed after a strenuous program of swimming destructive alterations of the liver cell framework and alterations in the area of meta- and paraplasmatic substructures. Statistically significant differences were observed in serum enzyme levels, compared with results obtained 10 days before. After prolonged exercise of four weeks an adaptation of the liver metabolism to the unphysiological strain was found. This was revealed by augmentation of cell organelles (mitochondria, ribosomes) and a slight increase of serum enzyme activities of glutamic oxalacetic transaminase (GOT), glutamic pyruvic transaminase (GPT), lactic dehydrogenase (LDH), and decrease of aldolase (ALD). A large increase in swimming performance was noticed and no great liver cell alterations could be observed after swimming as in untrained rats. Reasons for the described reactions in the liver cells, the differences in serum enzyme values, and the influence of training on liver metabolism after physical exercise are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00586832
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  • 6
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Korrosion durch Kunststoffschmelzen an verschiedenen wärmebehandelten Werkzeugstählen mittels ESCA, AES und SIMS (1987)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 329 (1987), S. 311-322 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The processing of synthetic material by injection molding machines and extruders produce wear on metal surfaces being in contact with the synthetic material. The corrosion in the melting areas of such machines depends on the chemical and morphological properties of the steel surface. The processing generates chemical changes which can be monitored by means of surface analysis methods. We examined different steels — containing Cr, Mo and V — which were corroded by various melts of synthetic materials. AES, ESCA and SIMS measurements show that some components especially chromium, play a key role for the corrosion process. Corrosion at the surface causes changes of the chemical composition along varying depths (100 – 300 Å). The knowledge of the correlation between chemical changes and surface properties will be helpful for choosing adequate alloys for synthetic material processing machines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00469162
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  • 7
    Electronic Resource
    Electronic Resource
    Free radical copolymerization of 1-vinyl naphthalene with styrene, methyl methacrylate, and acrylonitrile (1989)
    Springer
    Colloid & polymer science 267 (1989), S. 1096-1100 
    Details
    ISSN: 1435-1536
    Keywords: Freeradicalcopolymerization ; 1-vinyl-naphtalene ; styrene ; methylmetha-crylate ; acrylonitril ; relativereactivity ratios ; Q- ande-values
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Investigations on free radical copolymerization of 1-vinyl naphthalene (1-VNph, monomerM 2) with styrene (St), methyl methacrylate (MMA) and acrylonitrile (AN) (monomersm 1) in bulk at 60°C with AIBN as initiator are presented. Relative reactivity ratios were calculated by the Kelen-Tüdös method yielding:r st=0.70 ±0.23 andr 1−VNph=2.02 ±0.40 for system St/1-VNph;r MMA=0.32 ±0.10 andr 1−VNph=0.57 ±0.07 for system MMA/1-VNph andr AN=0.11 ±0.03 andr 1−VNph=0.45 ±0.09 for system AN/1-VNph.Q, e values for 1-VNph according to Alfrey, Price scheme were calculated toQ 1−VNph=1.02,e 1−VNph=−0.62.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01496929
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  • 8
    Electronic Resource
    Electronic Resource
    Aromatische Pinakone als Polymerisationsinitiatoren (1974)
    Springer
    Colloid & polymer science 252 (1974), S. 627-627 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01558185
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  • 9
    Electronic Resource
    Electronic Resource
    Photoabbau von Polymethylmethacrylat in Lösung (1971)
    Springer
    Colloid & polymer science 248 (1971), S. 871-876 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Summary The photodegradation of polymethylmethacrylate in chloroform and in 1,4-dioxane has been investigated in air in the presence of maleic anhydride. Maleic anhydride retards the photodegradation more effectively in 1.4-dioxane than in chloroform. The retardation of the degradation in 1.4-dioxane has been then interpreted as a direct sequence of the charge-transfer formation between the solvent and maleic anhydride.
    Notes: Zusammenfassung Der photochemische Abbau von Polymethylmethacrylat in Chloroform und in 1,4-Dioxan wurde in Anwesenheit von Maleinsäureanhydrid in Luftgegenwart untersucht. Maleinsäureanhydrid verzögert den Photoabbau des Polymeren in 1,4-Dioxan viel wirkungsvoller als in Chloroform. 1,4-Dioxan bildet mit Maleinsäureanhydrid einen Elektronen-Donator-Acceptor-Komplex, der für die Verzögerung des Abbaues verantwortlich ist.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01508043
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  • 10
    Electronic Resource
    Electronic Resource
    Monocyte functional studies in asymptomatic, human immunodeficiency disease virus (HIV)-infected individuals (1988)
    Springer
    Journal of clinical immunology 8 (1988), S. 486-494 
    Details
    ISSN: 1573-2592
    Keywords: Monocytes ; human immunodeficiency disease virus (HIV) ; lymphokine-activated killer (LAK) cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Various aspects of monocyte-associated function were evaluated in the peripheral blood mononuclear cells of male homosexuals who were infected with the human immunodeficiency disease virus (HIV). The functional assessments included indomethacin-sensitive regulation of blastogenesis and lymphokine-activated killer (LAK)-cell induction, chemiluminescent responses of mononu-clear leukocytes to opsonized zymosan, and the expression of HLA-DR antigen on CD-14-positive monocytes. The results obtained demonstrate that each of these functions is abnormal in asymptomatic individuals who have HIV core antigen (p24) in their circulation. These results suggest that monocyte abnormalities which could contribute to immune dysfunction in HIV-infected patients can be detected early during the course of HIV infection and are associated with the expression of serum HIV antigen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00916955
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