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  • 11
    Digitale Medien
    Digitale Medien
    Springer
    Journal of chemical ecology 8 (1982), S. 1299-1303 
    ISSN: 1573-1561
    Schlagwort(e): Thrips obscuratus ; Thysanoptera ; Thripidae ; attractant ; ethyl nicotinate ; apricots ; peaches
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Ethyl nicotinate was found to be a potent attractant forThrips obscuratus in peaches and apricots. The male-to-female ratio in traps was 1∶8. The chemical was more attractive than ripe fruit, with peak catches at harvest. Season-long trapping showed the efficiency of the chemical compared to unbaited traps. The chemical remained attractive for at least 2 weeks when 50 μl were placed in open 2-ml vial caps. Various pyralids, geometrids (Lepidoptera), and chironomids (Diptera) were also attracted in low numbers to ethyl nicotinate.
    Materialart: Digitale Medien
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  • 12
    Digitale Medien
    Digitale Medien
    Springer
    Journal of chemical ecology 7 (1981), S. 881-888 
    ISSN: 1573-1561
    Schlagwort(e): Aphid ; Cavariella aegopodii ; Homoptera ; Aphididae ; plant odor ; carvone ; attractant ; repellent ; host-finding
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Cavariella aegopodii is induced to land on traps by the monoterpene carvone, and the relevance of this to host-finding by the aphid is discussed. Catches are reduced by linalool. The interaction of plant chemicals in natural communities is discussed, and the possibility of using repellent chemicals for crop protection is suggested.
    Materialart: Digitale Medien
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  • 13
    Digitale Medien
    Digitale Medien
    Springer
    Digestive diseases and sciences 28 (1983), S. 321-327 
    ISSN: 1573-2568
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The absorption of nonheme59ferric chloride from a test meal was measured, using a whole-body counter, in 34 alcoholics with liver disease of varying severity, 30 of whom had normal hemoglobin values and four of whom were anemic. The results were compared with those obtained in five patients with iron-deficient anemia and nine healthy control subjects. There were no significant differences in mean percentage iron absorption (±sem) in the nonanemic alcoholic patients with fatty liver (14.6±3.7), alcoholic hepatitis (18.6±5.7), or cirrhosis (21.1±3.5) when compared with control subjects (22.0±2.5). Significantly increased mean percentage iron absorptions were seen, however, in the patients with iron-deficient anemia (64.8±5.6;P〈0.0001) and the alcoholics with anemia (60.7±7.8;P〈0.0001). There was an inverse relationship between iron absorption and serum ferritin concentration in the nonanemic alcoholics (r=−0.37;P〈0.025) but no correlation between iron absorption and liver iron concentration. The addition of absolute alcohol (0.5 g/kg body weight) to the test meal resulted in an increase in mean percentage iron absorption in eight control subjects (21.6±1.6 to 29.0±6.1) and in ten nonanemic alcoholics (15.8±3.2 to 20.0±3.8), although these differences did not achieve significance. Similarly when intravenous alcohol was given to four control subjects at the time of the test meal, iron absorption increased in all four so that the mean percentage iron absorption increased, although not significantly, from 17.6±2.7 to 39.3±9.5. Iron absorption in alcoholics does not differ significantly from normal. While the increased liver iron concentrations seen in approximately one third of alcoholics cannot be attributed to an increase in iron absorption as a result of chronic alcohol ingestion, further studies are needed to elucidate the acute effects of alcohol on iron absorption.
    Materialart: Digitale Medien
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  • 14
    Digitale Medien
    Digitale Medien
    Springer
    Digestive diseases and sciences 23 (1978), S. 660-662 
    ISSN: 1573-2568
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 15
    Digitale Medien
    Digitale Medien
    Springer
    Digestive diseases and sciences 26 (1981), S. 778-782 
    ISSN: 1573-2568
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Three patients, two males and one female, with asymptomatic primary sclerosing cholangitis (PSC) are described. The diagnosis was made in each case by endoscopic retrograde cholangiography after investigation of persistent elevation of the serum alkaline phosphatase. All three have remained completely well without any medical or surgical treatment for 3, 7, and 15 years, respectively, despite extensive involvement of the biliary tree. Follow-up liver biopsies in two have shown no histological evidence of progression to secondary biliary cirrhosis. PSC may occur more frequently and may follow a less severe clinical course than previously recognized.
    Materialart: Digitale Medien
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  • 16
    ISSN: 1573-2568
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Total ferritin concentration was measured in sera of 30 patients with primary liver cell cancer (PLCC) and 33 patients with cirrhosis and compared with serum alpha-fetoprotein levels as a diagnostic marker of PLCC. Serum ferritin concentration was raised in 19 patients (63%) with PLCC and 11 patients (33%) with cirrhosis. The median level was significantly higher (P〈0.001) in the PLCC group (560 μg/liter) than in the cirrhotic group (137 μg/liter), although there was considerable overlap. Serum ferritin was posititively correlated with serum aminotransferase levels in the cirrhotic patients (r=0.53,P〈0.001), reflecting hepatic necrosis, but not in the PLCC patients. The concentration of ferritin binding to concanavalin A was measured in the sera of patients with elevated total serum ferritin. Although the proportion of bound ferritin was decreased in the majority of PLCC sera compared to controls (P〈0.001), there was overlap with the cirrhotic group, making it unlikely that this assay is useful in distinguishing a tumor-specific isoferritin. Serum alpha-fetoprotein levels were elevated in 21 patients (70%) with PLCC and proved to be a highly sensitive and specific test for PLCC. There was no relationship between the alpha-fetoprotein and serum ferritin concentrations. Serum ferritin is inferior to alpha-fetoprotein as an initial screening test for PLCC, but in alpha-fetoprotein-negative patients serum ferritin may have a role in monitoring therapy. Patients with cirrhosis with normal serum alpha-fetoprotein and ferritin concentrations are very unlikely to have PLCC.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 17
    ISSN: 1573-2568
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Liver iron concentrations were determined in 60 alcoholics with liver disease of varying severity, 15 patients with untreated idiopathic hemochromatosis, and 16 control subjects with biliary tract disease. Mean liver iron concentrations (μg/100 mg dry weight) were significantly greater in the alcoholics (156.4±7.8 (sem);P〈0.05) and in patients with idiopathic hemochromatosis (2094.5±230.7;P〈0.01) than in control subjects (53.0±7.0). Liver iron concentrations of 〉140 μg/100 mg were found in 17 alcoholics (29%) and in all 15 patients with idiopathic hemochromatosis. Liver iron concentrations 〉1000 μg/100 mg were found in all patients with idiopathic hemochromatosis but in none of the alcoholics. In the alcoholics no relationship existed between liver iron concentrations and the amount of alcohol consumed daily, the length of the drinking history, the amount of beverage iron consumed daily, or the severity of the liver disease. Serum ferritin concentrations reflected iron stores in patients with hemochromatosis and in alcoholics with minimal liver disease. However, in alcoholics with significant liver disease serum ferritin concentrations did not reflect iron stores accurately, although with normal values iron overload is unlikely. Serum iron concentration and percentage saturation of total iron-binding capacity were of little value in assessing iron status in either alcoholics or patients with hemochromatosis. Measurement of the liver iron concentration clearly differentiates between alcoholics with significant siderosis and patients with idiopathic hemochromatosis.
    Materialart: Digitale Medien
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  • 18
    Digitale Medien
    Digitale Medien
    Springer
    Solar physics 47 (1976), S. 611-626 
    ISSN: 1573-093X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Temperatures and temperature gradients for the outer corona are obtained from brightness gradients of EUV lines that were measured with the spectroheliograph on OSO-7. Brightness gradients show considerable deviations from isothermal model calculations that include collisional excitation and photoexcitation. A negative temperature gradient that gives both positive and negative ion abundance gradients appears to be able to account for the discrepancy. For λ284 of Fe xv, perhaps the strongest line from the outer corona, measurements during 1972 appear to be consistent with (i) a temperature near 2.3×106K near the equator at ϱ = 1.3±0.1 solar radii from the solar center; (ii) (ϱ/T) dT/dϱ values near -0.7 that extend from as low as ϱ = 1.2 to about ϱ = 1.8. Temperatures from strong lines of Fe xiv and Fe xvi indicate that variations of about ±0.2×106K exist along lines of sight where emission is appreciable. There appears to be some agreement between these results and temperature measurements from ion abundances in the solar wind and Doppler width of λ5303.
    Materialart: Digitale Medien
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  • 19
    Digitale Medien
    Digitale Medien
    Springer
    Solar physics 42 (1975), S. 487-496 
    ISSN: 1573-093X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The abundance of Fe relative to H is obtained by using resonantly scattered intensities of λ 284 of Fe XV that were measured with OSO-7 and resonantly scattered intensities of Lα of H I that were obtained by Gabriel (1971). Because of possible differences in electron densities along lines of sight for these non-simultaneous measurements and in relative calibrations, results are rather uncertain but still indicate that the average Fe abundance relative to H in the corona appears to be at least as large as a recent photospheric abundance. Some limitations in using this method for obtaining abundances are examined for future experiments with simultaneous measurements and well calibrated detectors.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 20
    Digitale Medien
    Digitale Medien
    Springer
    Solar physics 43 (1975), S. 337-350 
    ISSN: 1573-093X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The spectral composition and spatial distribution of equatorial coronal emission near 304 Å is examined. Spectral scans indicate that the predominant line is from Si xi. Comparisons of observations with calculations of intensity changes with altitude indicate that collisional excitation is important near the Sun but that photoexcitation becomes dominant beyond about 1.3 R ⊙ from the solar center. Observed and calculated intensities are in approximate agreement for abundances and electron densities that are within the range of observed values.
    Materialart: Digitale Medien
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