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  • 1
    Electronic Resource
    Electronic Resource
    Isolated headache as the presenting clinical manifestation of intracranial tumors: a prospective study (1994)
    USA/Oxford, UK : Blackwell Science Ltd
    Cephalalgia 14 (1994), S. 0 
    Details
    ISSN: 1468-2982
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Isolated headache as the presenting clinical manifestation of intracranial tumors: a prospective study. Cephalalgia 1994;1'4:270-1. Oslo. ISSN 0333-1024We prospectively studied over two years the incidence of headache as the initial and isolated clinical manifestation of adult patients suffering from intracranial tumors (n = 183). Fifteen patients (8%) exhibited headache as their first and isolated clinical manifestation. Age, sex, neoplasm localization, or pathological diagnosis did not correlate with the presence of headache. Posterior fossa location and hydrocephalus, though not reaching statistical significance, were more frequent in patients who presented with headache as the first symptom. At the moment of diagnosis, 59 (31%) of the patients admitted to headache, though only I out of the 15 patients starting as headache still had this symptom as the only manifestation. From our experience in adults, isolated headache for longer than 10 weeks will only exceptionally be secondary to an intracranial neoplasm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1468-2982.1994.1404270.x
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  • 2
    Electronic Resource
    Electronic Resource
    Infrared (0.9–1.65 μm) emission from thallium iodide photoexcited with ultraviolet excimer laser radiation (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 96 (1992), S. 1840-1847 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The infrared emission spectra from 0.9 to 1.65 μm produced when thallium iodide vapor is photodissociated by excimer laser wavelengths of 193, 248, 308, and 351 nm are reported. In this spectral region, only atomic thallium transitions were observed. No emission from metastable atomic iodine at 1.315 μm (5 2P1/2→5 2P3/2) or thallium at 1.283 μm (6 2P3/2→6 2P1/2) was ever detected in contrast to strong 1.315 μm signals obtained by ultraviolet (UV) excimer laser dissociation of C3F7I. The failure to detect metastable atomic emission from TlI photodissociation is explained by the fast quenching of the metastable states during superelastic collision with electrons produced by photoionization of the TlI. Consequently, a pulsed iodine 1.315 μm laser based on photodissociation of thallium iodide does not seem practical.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.462085
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  • 3
    Electronic Resource
    Electronic Resource
    Scaled-up production of n-C3F7I photolytic laser "fuel'' (1988)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 59 (1988), S. 2386-2389 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A tenfold mass production scale-up that provides an economical synthesis method for producing normal-heptafluoropropyl iodide (n-C3F7I) laser "fuel'' sustaining stable and reliable cw atomic iodine lasing at 1.315 μ via UV photolysis is reported. Such results strongly indicate that high purity n-C3F7I is being synthesized. Over 1 kg per day production of this n-C3F7I is demonstrated. The synthesis procedure involves three steps: formation of the n-C3F7COONa salt, refluxing at 45 °C, and a packed column distillation. During the synthesis, particular attention is given to minimizing those impurities producing detrimental effects on atomic iodine lasers. Yields of 65%–75% for n-C3F7I laser "fuel'' are achieved whenever liquid nitrogen is used to collect the synthesized product.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139914
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  • 4
    Electronic Resource
    Electronic Resource
    Infrared wavelength and temperature dependence of optically induced terahertz radiation from InSb (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 65 (1994), S. 2946-2948 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Results of the temperature and infrared wavelength (0.8, 1.4, and 1.9 μm) dependence of terahertz radiation generated from both undoped and Te-doped InSb irradiated with ≈125 fs laser pulses are reported. Undoped InSb shows a substantial change in the spectral content of the terahertz radiation between 80 and 260 K, while the spectrum of Te-doped InSb remains nearly unchanged, an effect attributed to its mobility being dominated by impurity scattering. Also, the terahertz radiation from undoped InSb at 80 K is dependent on the irradiating wavelength, with both a higher frequency spectrum and much larger amplitude generated at longer wavelengths. No such effect is observed at 260 K. © 1994 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.112542
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  • 5
    Electronic Resource
    Electronic Resource
    Primary epithelioid leiomyosarcoma of bone (1999)
    Springer
    Virchows Archiv 434 (1999), S. 367-371 
    Details
    ISSN: 1432-2307
    Keywords: Key words Epithelioid leiomyosarcoma ; Bone tumours
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We describe an epithelioid leiomyosarcoma of bone located in the right knee of a 51-year-old woman. Plain radiograph and CT scan revealed a poorly defined lytic and destructive mass in the upper metaepiphyseal right tibia which involved surrounding soft tissues. The lesion was composed of proliferating monotonous round cells with a high mitotic activity with scanty intersecting spindle cell fascicles. Immunohistochemistry of both areas demonstrated a strong positivity for actin (HHF-35 and α-SMA) and vimentin, and negative reactions for desmin, keratin (AE1 AE3), epithelial membrane antigen, S-100 protein, factor VIII-related antigen, CD 31 and CD 34. Ultrastructural study confirmed a diagnosis of leiomyosarcoma. This is the first detailed description of the microscopic and radiological features of primary epithelioid leiomyosarcoma of bone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004280050354
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  • 6
    Electronic Resource
    Electronic Resource
    Primary aneurysmal cyst of soft tissue (1996)
    Springer
    Virchows Archiv 428 (1996), S. 125-129 
    Details
    ISSN: 1432-2307
    Keywords: Soft tissue ; Aneurysmal bone cyst ; Magnetic resonance imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We report a case of primary aneurysmal cyst of soft tissues in a 57-year-old woman presenting with a painful mass in her left arm. Conventional radiography showed a radiolucent soft tissue mass surrounded by a ring of bone. MRI displayed an unusual, ill-defined soft tissue lesion that was not connected to the nearby humerus and appeared to be an aggressive tumour. Microscopically, the mass consisted of multiple anastomosing cavernous channels surrounded by a peripheral band of mature trabecular bone. These bloody channels were separated by fibrous septa containing fibroblasts, histiocytes and multinucleated giant cells, as well as fibromyxochondroid material. Some of these giant cells lined the septa and partially occupied the lumen of the channels. Ultrastructurally, the features observed in this tumour were similar to those described in aneurysmal bone cyst; the giant cells lining the septa were an additional observation. Whereas most bone tumours have a well-known extraosseous counterpart, this unique lesion is not well recognized by surgical pathologists and the few published cases have been reported under different names. Gross, microscopic, radiological and ultrastructural findings are presented to familiarize pathologists with this underdiagnosed condition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00193941
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of small mammals and vertebrate predators on vegetation in the Chilean semiarid zone (1997)
    Springer
    Oecologia 109 (1997), S. 398-406 
    Details
    ISSN: 1432-1939
    Keywords: Key words Herbivory ; Predation ; Tritrophic effects ; Ephemeral plants ; Chilean semiarid zone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  We monitored the cover and seed bank response of shrubs, perennial herbs, and ephemeral plants to experimental exclusion of both the principal rodent herbivore, Octodon degus, and its vertebrate predators from 1989 to 1994 in a semiarid Chilean mediterranean site. Although both richness and species composition of the plant community at the study site were largely determined by abiotic factors (mainly rainfall and soil nutrients), predator and herbivore exclusion had significant effects on the relative abundance of several plant species. Experimental exclusion of herbivores was associated with increased cover of some shrubs and a perennial grass, and decreased cover and seed densities of several ephemerals, especially those exotic or restricted to areas underneath shrubs. Herbivores apparently reduced shrubs through browsing and indirectly affected herb cover and seed densities by opening up areas under shrubs and/or modifying physical and chemical conditions of the soil. Plant responses to predator exclusion were less clear. Nevertheless, higher cover of some shrubs and ephemerals in the presence of predators suggests tritrophic effects through changes in small mammal densities and/or foraging behavior.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004420050099
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  • 8
    Electronic Resource
    Electronic Resource
    Evaluation of a mixed immunosorbent for selective trace enrichment of phenylurea herbicides from plant material (1998)
    Springer
    Fresenius' journal of analytical chemistry 362 (1998), S. 547-551 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A mixed immunosorbent, composed of anti-isoproturon and anti-chlortoluron antibodies immobilized on aldehyde-activated silica was evaluated for the trace enrichment and clean-up of several phenylurea herbicides from potatoes, carrots and peas. As the immunosorbent exhibited non-specific interactions with the matrix components, a previous clean-up step based on gel filtration (Sephadex G-25 PD-10 column) or anion-exchange (Power 1 × 8 Dionex column) was necessary. The coupling of gel filtration and immunosorbent with subsequent HPLC/UV determination allowed the determination of selected herbicides in potatoes in the 30 ng/g range with high precision, but for more complex samples (carrots and peas) the combination of anion-exchange resin and immunosorbent was required. With 30 ng/g spiked samples recovery rates for isoproturon, chlortoluron, metobromuron, linuron and chlorbromuron averaged 80 ± 20% (n = 5 in two consecutive days) for the whole procedure and the estimated detection limits ranged from 5 to 20 ng/g.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160051122
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  • 9
    Electronic Resource
    Electronic Resource
    The epidemiology of head injury in Cantabria (1992)
    Springer
    European journal of epidemiology 8 (1992), S. 832-837 
    Details
    ISSN: 1573-7284
    Keywords: Epidemiology ; Head injury ; Incidence ; Mortality ; Socio-demographic and temporal correlates ; Alcohol consumption
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The epidemiology of head injury was studied in Cantabria, Spain, using a methodological design consisting of a cross-selectional analysis of one year of duration and an additional one year follow-up of all the patients included in the initial sample. The 477 cases identified represent a rate of 91/100,000, with males showing a head injury rate 2.7 times higher that than for females. Sixty per cent of all cases involved traffic accidents, falls accounted for 24% and industrial accidents were the cause in 8%. The annual age-adjusted mortality rate was 19.7/100,000. Over 92% of all deaths occurred prior to hospital admission. The presence of alcohol intoxication was evaluated in 211 cases by determining the osmolar gap. It was found that 51% of all the cases examined presented clear evidence of acute alcohol intoxication.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00145328
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  • 10
    Electronic Resource
    Electronic Resource
    Sex differences in mental illness: a community study of the influence of physical health and sociodemographic factors (1992)
    Springer
    Social psychiatry and psychiatric epidemiology 27 (1992), S. 62-68 
    Details
    ISSN: 1433-9285
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary This paper examines sex differences in psychiatric morbidity, using data from a community sample. The PSE-CATEGO-ID system was used to evaluate psychopathology. Six sociodemographic factors and physical illness were taken as independent variables. Females exhibit both a significantly higher psychiatric morbidity than males and a predominance of syndromes closely related to depression (SD; OD syndromes) and anxiety (GA; SA; TE; IT syndromes). Logistic modelling analysis, carried out separately for each sex, yielded different models. Psychiatric illness in men was best predicted by physical illness, unemployment and the interaction between the two. In contrast, physical illness emerged, in women, as the only factor exerting significant effects on psychiatric morbidity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00788507
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