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  • 1
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 260 (1982), S. 435-443 
    ISSN: 1435-1536
    Keywords: Detergents ; Micelles ; Short Range Order ; Neutron Scattering
    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 Small-angle-neutron-scattering-(SANS)-measurements were carried out with soulutions of Tetramethylam-moniumperfluoroctanesulfonate (TMAFOS) and Diethylammoniumperfluorononanoate (DEAFN) in pure D2O and in mixtures of D2O and H2O. For the TMAFOS-solutions the experimentally observed scattering functions, i.e. the coherent scattering intensity as a function of the scattering angles, could be fitted very well for large scattering angles with the theoretically calculated scattering function for rodlike particles and the dimensions of the rods could be evaluated from these fits. The radius of the rods was independent of the detergent concentration and equal to the double length of a detergent molecule. For small scattering angles the scattering function showed a maximum which was due to nearest neighbour order between the aggregates resulting from the intermicellar interaction. From this maximum a mean distance between the aggregates and hence the lengths L of the rods could be calculated. For the DEAFN-solutions the observed scattering function showed no maximum what clearly indicates the absence of nearest neighbour order between the aggregates. The experimentally observed scattering functions could not be fitted on the basis of rodlike aggregates, but agreed rather well with the theoretically calculated scattering functions for disclike aggregates and also for vesicle-like double layers. The dimensions for the discs could be evaluated from the fits.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Rheologica acta 21 (1982), S. 561-563 
    ISSN: 1435-1528
    Keywords: Rheopexy ; electrical anisotropy ; stress relaxation ; phase transition ; detergent solution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract Aqueous solutions of some cationic detergents show rheopectic behaviour at very low concentrations. Rheological measurements and the electrical anisotropy of the streaming solutions indicate that the rheopectic behaviour of the solutions is due to a shear induced phase transition.
    Type of Medium: Electronic Resource
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  • 4
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    Unknown
    Syracuse, N.Y. : Periodicals Archive Online (PAO)
    Symposium. 36:3 (1982:Fall) 276 
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 27 (1982), S. 39-47 
    ISSN: 1432-0630
    Keywords: 71.55.Fr ; 72.80.Cw ; 71.45.Gm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The free charge carrier concentration as a function of the reciprocal temperature and the doping level [p(1/T)- andp(C)-characteristics] is calculated from the neutrality equation of a semiconductor containing positive or negativeU centers. The typical exponential laws and power laws of thep(1/T)- andp(C)-characteristics are given both for positive and negative correlation energy of the bound charge carrier pairs. Furthermore, the characteristics are evaluated differentially, in order to obtain criteria for the presence of negativeU centers in semiconductors.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-1238
    Keywords: Cefotaxime ; Meningitis ; CSF-concentrations ; Neurosurgical patients ; Cephalosporins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In three groups of patients levels of cefotaxime in serum and cerebrospinal fluid were determined. Therapeutic value and efficacy are discussed in meningitis patients. Nine concentrations of cefotaxime in lumbar and ventricular CSF out of 19 in a group of seven neurosurgical patients with mild to moderate impairment of the blood-CSF-barrier were higher than 0.5 μg/ml. In seven determinations in a second group of six patients with no or very little dysfunction of the blood-cerebrospinal-fluid barrier only twice cefotaxime was not detectable in lumbar CSF. Concentrations of cefotaxime in 25 determinations of lumbar or ventricular CSF in six patients with bacterial meningitis ranged from 1.1 μg/ml to 19.2 μg/ml. Treatment with cefotaxime alone was successful in a patient withE. coli meningitis and ventriculitis after infection of a ventriculo-atrial shunt and in another patient with pneumococcal meningitis and penicillin allergy. The other four patients with bacterial meningitis were treated successfully by antibiotics including cefotaxime.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Histochemistry and cell biology 75 (1982), S. 31-42 
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The activity of the liver enzymes G6Pase, G6PDH and ME was studied in rats of 2–9 weeks old by histochemical means. In addition, G6PDH and ME activity was quantitatively determined in homogenates. In the 2nd and 3rd week G6Pase is similarly distributed in both sexes: while in the periportal zone high activity is demonstrable, the perivenous zone shows only low activity. After this period a nearly homogeneous distribution pattern becomes evident in all animals. Sex difference occurs after the 6th week: in the livers of male rats the periportal “maximum” is sometimes combined with a second peak in the perivenous area, in females a steep gradient emerges with high activity in the periportal zone and a low one in the perivenous zone. In the first postnatal weeks G6PDH activity is very low in parenchymal cells, but very prominent in Kupffer cells. Around the 5th week there is an increase, predominantly in the perivenous zone of both sexes. While there is again a further decrease demonstrable in male rats, the G6PDH activity of female rats rises to high adult values. This increase seems to be restricted to the perivenous zone. ME can be demonstrated at first in leucocytes. In the course of the 3rd week there is an increase of activity in both sexes: ME is demonstrable in parenchymal cells of the perivenous area and in scattered hepatocytes of the periportal area. In male rats, the perivenous activity is diminished towards the end of the investigation period, in females, however, a high activity remains in the perivenous zone. The data show that in females the activity of NADP dependent enzymes is high in the perivenous zone, so it may be assumed that a lipogenic area is situated around the terminal efferent vessels. Because of the sex difference this area may be hormone-dependent. The lipogenic area is situated opposite to the gluco(neo)genic area which corresponds to the periportal zone.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Chromosoma 85 (1982), S. 539-551 
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The dominant suppressor Su(var)b 101 and the dominant enhancer En(var)c 101 were found to affect significantly white variegation in a strongly variegating line of the w m4 chromosome (w m4h ) which has been used as standard rearrangement for a genetic dissection of position-effect variegation (Reuter and Wolff, 1981). Both mutations were also shown to affect position-effect heterochromatisation in T(1;4)w m258-21 and variegation in all the rearrangements tested (white, brown, scute and bobbed variegation). These results suggest that the genes identified encode functions essential for the manifestation of gene inactivation in position-effect rearrangements. It seems also reasonable to assume that in all the rearrangements tested identical heterochromatisation processes lead to inactivation of the genes whose phenotype is variegated.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Molecular genetics and genomics 188 (1982), S. 480-485 
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Mutations at a locus on chromosome II of D. melanogaster suppressing position-effect variegation mutations have been identified which display recessive butyrate sensitivity. Survival of homozygous mutant flies is significantly reduced on medium containing sodium n-butyrate. The butyrate sensitive suppressor mutations are further characterized by recessive female sterility and reduced survival of homozygotes. Complementation analysis showed their allelism. The locus of these mutations, Su-var (2) 1, has been localized to 40.5±0.2 and, by using interstitial duplications, to region 31CD on the cytogenetic map. Moreover, the mutant alleles of the Su-var (2) 1 locus display a lethal interaction with the heterochromatic Y chromosome. The presence or absence of a Y chromosome in males or females has a strong influence on the viability of homozygous or transheterozygous suppressor flies. All the genetic properties of Su-var (2) 1 mutants suggest strongly that this locus affects chromosome condensation.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Infection 10 (1982), S. 28-30 
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Eosinophilia of more than 50% was observed for a period of ten days in the cerebrospinal fluid (CSF) of a patient with acute meningomyelitis and paraplegia. Serologic studies suggested the simultaneous infection withMycoplasma pneumoniae andCoxsackie A 09 as being a likely cause of meningomyelitis. This case demonstrates that pronounced CSF eosinophilia may be observed for a short period in non-parasitic infections of the central nervous system. Parasitic infestation may be assumed only when eosinophilia persists for several months.
    Notes: Zusammenfassung Bei einer akuten Meningomyelitis mit Querschnittssymptomatik wurde eine über zehn Tage anhaltende, ungewöhnlich hohe Liquoreosinophilie von mehr als 50% beobachtet. Als Ursache für die Meningomyelitis konnte aufgrund serologischer Untersuchungen eine Interferenz zwischen einer Infektion mitMycoplasma pneumoniae undCoxsackievirus A 09 angenommen werden. Dieser Fall zeigt, daß eine kurzfristig, hohe Eosinophilie im Liquor cerebrospinalis auch bei einer nicht-parasitären, erregerbedingten Entzündung des Zentralnervensystems auftreten kann. Erst wenn eine Liquoreosinophilie über Monate anhält, scheint sie richtungweisend auf eine parasitäre Erkrankung zu sein.
    Type of Medium: Electronic Resource
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