Comedo formation in acne Eberhardt, H
Archives for dermatological research = Archiv fur dermatologische Forschung,
01/1975, Letnik:
254, Številka:
3
Journal Article
Recenzirano
Comedones contain a considerable quantity of water. In some cases a water content of more than 40% can be detected. The comedo consists of two parts, an inner nucleus built up to unorganized ...materials and a capsule with concentrically arranged shells. The material of the nucleus contains small scales produced by normal keratinization. The materials of the capsule consists of larger scales, which result from hyperkeratosis. The nucleus of the comedo seems to be identical with the early comedo. A similar structure can be formed in vitro by adding water to sebum. Microorganisms have optimal growth conditions in the early comedo.
To determine the influence of changes in gastric juice pH due to intravenous administration of pentagastrin and omeprazole on intramucosal regional PCO2 (Pr(CO2)), we investigated 17 healthy human ...volunteers. Gastric juice pH was obtained from a glass pH electrode for continuous gastric juice pH measurement and Pr(CO2))was measured by using automated air tonometry. After baseline (8:00 A.M.-9:00 A.M.) the subjects received 0.6 microg/kg/h pentagastrin intravenously for 1 h (9:00 A.M.-10:00 A.M., after stimulation 10:00 A.M.-11:00 A.M.) and 40 mg omeprazole intravenously (after omeprazole 11:00 A.M.-3:00 P.M.). Following pentagastrin administration gastric juice pH significantly decreased from 1.2 +/- 0.4 to 0.6 +/- 0.4 (mean +/- SD, p < 0.007, versus baseline), whereas omeprazole transiently increased luminal pH up to 4.4 +/- 1.7 (p < 0.007 versus baseline). These subsequent changes in gastric juice pH were accompanied by a significant increase in Pr(CO2) from 48 +/- 12 to 61 +/- 17 mm Hg (p < 0.007 versus baseline) and a decrease to 44 +/- 5 mm Hg (p < 0.002 versus pentagastrin), respectively. A gastric juice pH > 4 considerably reduces mean gastric Pr(CO2) and interindividual variability. Thus omeprazole may improve the validity of gastric tonometry data.
A case is reported of presumed twin-twin transfusion syndrome successfully treated with amniocentesis and also complicated by congenital cytomegalovirus infection and second trimester exposure to ...high-dose ibuprofen with temporally related ductal narrowing.
Tilt table testing is a well approached examination for differentiating unexplained syncope and control trial after therapy. It is evaluated at children and is fast and reliable in spite of high ...personality effort. We present the indication of examination, course of examination, additional procedures like transcranial doppler sonography, reaction models during the tilt table examination and treatment features for neurocardiogenic syncope.
Transcranial Doppler sonography was used to asses time relation and characteristically changes in middle cerebral artery blood flow velocity before syncope during tilt table test in children.
We ...performed tilt table tests in 40 pediatric patients with a medical history for syncope after exclusion of neurologic and cardiologic diseases. Examination was done in a 70 degrees postural position under control of electrocardiogram, blood pressure measurement and measurements of blood flow velocity of middle cerebral artery by transcranial Doppler with 3-MHz probe.
In 13 children syncope occurred after 5 to 45 min (average 23.3). 10 of them were neurocardiogenic syncopes. With it diastolic and medium blood flow velocity of middle cerebral artery initial ever increased while resistance and pulsatility index decreased. Just before syncope the diastolic blood flow velocity decreased dramatically thus no diastolic blood flow could be measured, respectively. Almost we could measure no diastolic blood flow just before syncope occurred.
Patients with neurocardiogenic syncope do have characteristically blood flow velocity changes of middle cerebral artery just before loosing consciousness. Transcranial Doppler is a usefully examination during tilt table. Clear transcranial Doppler results can help to prevent children from the impending syncope.
Measurements of target asymmetries and double-polarization observables for the reaction \(\gamma p\to p\pi^0\pi^0\) are reported. The data were taken with the CBELSA/TAPS experiment at the ELSA ...facility (Bonn University) using the Bonn frozen-spin butanol (C\(_4\)H\(_9\)OH) target, which provided transversely polarized protons. Linearly polarized photons were produced via bremsstrahlung off a diamond crystal. The data cover the photon energy range from \(E_{\gamma}\)=650 MeV to \(E_{\gamma}\)=2600 MeV and nearly the complete angular range. The results have been included in the BnGa partial wave analysis. Experimental results and the fit agree very well. Observed systematic differences in the branching ratios for decays of \(N^*\) and \(\Delta^*\) resonances are attributed to the internal structure of these excited nucleon states. Resonances which can be assigned to SU(6)\(\times\)O(3) two-oscillator configurations show larger branching ratios to intermediate states with non-zero intrinsic orbital angular momenta than resonances assigned to one-oscillator configurations.
