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P Linde

Publications and source records attributed to P Linde.

11 recordsLinked to original sources
PubMed2006

Selective adsorption, bound states, and potential parameters for He, Ne, and Ar interacting with a Cu(110) surface.

Using nozzle beams of He, Ne, and Ar, we have measured diffractive selective adsorption resonances from a Cu(110) surface kept at 20 K. Bound state energies of the atom-surface potentials have been determined from plots of the measured resonance energies versus incident angle and their fits to calculated kinematical dispersion relations. For 3He and 4He we have found a unique level assignment that is compatible with a single gas-surface potential curve with a well depth of 6.05 meV of the He-Cu(110) potential. This value is about 10% larger than the prediction of 5.55 meV from the current physisorption theory. The Ne and Ar data reveal a large number of closely spaced levels with level separations and estimated van der Waals coefficients that are compatible with available theoretical data.

Journal Article↗
PubMed2006

High-resolution resonance measurements of the physisorption interaction.

Narrow selective adsorption resonances, with line widths given by the natural lifetime of the intermediate resonance state, have been observed directly in the angular distributions of Ne nozzle beams diffracted from a 20 K Cu(110) surface. Using beams of 20Ne and 22Ne isotopes we show that this high-resolution mode of resonance detection permits, even in a case of a small isotope effect, unique assignment of bound level sequences compatible with a single gas-surface potential curve.

Journal Article↗
PubMed1994

Late complications after aortic surgery.

The incidence of false aneurysms, anastomotic stenoses, and ureteric obstruction is reported to be low in patients who have undergone aortic surgery. The use of intravenous peripheral digital subtraction angiography (IVDSA) with completion excretory urography (CEU) may provide a more sensitive means of long-term detection of these complications. The aim of this study was to (1) establish the incidence of anastomotic aneurysms, anastomotic stenoses, and ureteric obstruction after aortic surgery; (2) identify local and systemic factors that predispose to these complications; and (3) evaluate IVDSA as a single radiologic investigation to diagnose these complications. Forty-four patients who had undergone aortic surgery 1 to 12.3 years previously agreed to undergo IVDSA and CEU. False aneurysms were found at 10 distal anastomoses (none at the aorta), for an anastomotic incidence of 11.2% and a patient incidence of 15.9%. Endarterectomy and the femoral artery as a site of distal anastomosis were important factors in the development of anastomotic aneurysms, as were detected radiologically at eight aortic anastomosis (18%). There were no distal anastomotic stenoses. Hypercholesterolemia was more common in this group (62.5%) than in the overall group (21.2%). Three asymptomatic ureteric obstructions were diagnosed in two patients, both of whom had emergency surgery for ruptured aortic aneurysms. The higher incidence of anastomotic aneurysms, anastomotic stenoses, and asymptomatic ureteric obstruction sound merits careful follow-up. IVDSA with CEU may be a simple and effective method of detection.

Anastomosis, Surgical↗
PubMed1990

[Meteorologic effects on hemorrhagic diathesis in hemophilia. 1. Demonstrating weather effects based on a complex weather phase scheme].

In haemophilia frequently spontaneous haemorrhages occur without recognition of an evoking cause. Various bleeding-disposing factors are discussed, among others also influences of weather. For the investigation of the meteorotropic relations 1,802 episodes of haemorrhages in 223 haemophiliacs were coordinated to a complex scheme of weather phases. An undisturbed course of the weather was in general connected with a decrease of bleeding, whereas in an influence of low pressure with advection of cold air an increase of the haemorrhages was established. Conspicuous was furthermore the negative biotropism of the radiation-intensive sunny fine weather in summer, which is probably to be traced back to the thermic load in this weather situation.

Atmospheric Pressure↗
PubMed1990

[Meteorologic effects on hemorrhagic diathesis in hemophilia. 2. Weather effects on hemophilia with special reference to the atmospheric temperature-humidity complex].

The meteotropism of haemophilic haemorrhages was investigated for 1,802 episodes of bleeding in 223 patients with the help of selected parameters of the atmospheric temperature-humidity complex and the air pressure. The accumulation of haemorrhages under the influence of tropic air masses was particularly conspicuous. In low blood pressure the frequency of bleeding also increased, whereas high-pressure conditions showed a decrease of bleeding. The study clearly confirms that the haemorrhagic tendency in haemophilia is influenced by weather. Therefore a medico-meteorologic forecast should be taken into consideration for haemophiliacs.

Atmospheric Pressure↗
PubMed1990

Dust in buildings with man-made mineral fiber ceiling boards.

Man-made mineral fibers (MMMF) and other airborne dusts were measured in 105 rooms in a representative sample of public buildings, excluding rooms with physically damaged boards or buildings with notable indoor climate problems. There were no differences in the MMMF concentrations with respect to the type of binder. The average concentrations ranged from 17 to 210 respirable MMMF/m3. The average concentrations of the reference group was intermediate and therefore indicated that sources other than ceiling boards contributed to the obtained values. No grouping by concentration of MMMF on cupboards was possible. Airborne concentrations of respirable MMMF were 2.7 times lower in rooms with mechanical ventilation than in rooms with natural ventilation. For nonrespirable MMMF, the most important factor was the quality of the cleaning. The concentration in poorly cleaned rooms was 5.5 times that of well-cleaned rooms. Ventilation, quality of cleaning, and number of persons affected the non-MMMF and total dust concentrations.

Air Pollutants↗
PubMed1990

[One-year analysis of bleeding events in 223 hemophiliacs in the DDR].

The reports of 223 haemophiliacs living in the districts Halle, Leipzig, Karl-Marx-Stadt, and Gera had been analyzed for bleeding events in 1986. There were suffering from haemophilia A 185, from haemophilia B 36 and 2 persons from a complex disorder. In each case 73 patients suffer from a severe and a moderate type of haemophilia. In 55 patients the diagnosis was mild form of haemophilia and in 22 subhaemophilia. Altogether 1802 bleeding episodes had been registered with the following locations: elbow joint 21.0%, knee joint 17.9%, ankle 14.2%, shoulder 4.3%. In 5% of all cases multiple joints had been affected at the same time. Soft tissue bleedings occurred in 16.7% of all cases. For substitution treatment of these 1802 bleeding events altogether 9020 transfusion units were needed, appropriate to 40.4 per year and 52.4 per year and bleeding patient respectively. Expense and duration of treatment depend on the bleeding location. Conclusions for the clinics and the transfusion service are possible.

Adolescent↗
PubMed1990

[Recommendations for a medical-meteorologic prognosis for hemophilia].

A one year lasting study about the relation between bleedings in haemophiliacs and weather was performed. There had been included 1802 bleeding events. The influence of meteorologic factors to bleeding was proved. The influx of warm air proved inopportune. The decrease in atmospheric pressure as well as winter cold fronts lead to increase of bleeding tendency. Haemophiliacs should avoid physical and psychical stress in such unconvenient atmospheric situations. The replacement therapy should be adapted to the weather situation.

Atmospheric Pressure↗
PubMed1990

Medication compliance, antidepressant blood levels, and side effects in Southeast Asian patients.

A study of medication compliance, side effects, and clinical change with the use of antidepressants in 32 Southeast Asian refugee patients seen at an urban mental health center is reported. Patients met criteria for either major depressive episode, posttraumatic stress disorder, or both. Only five of the 32 patients who stated that they were taking their medications regularly had antidepressant blood levels in the therapeutic range. Another 10 patients had subtherapeutic levels and the remaining 17 had undetectable blood levels. Patients with therapeutic blood levels had fewer side effects (p = 0.049) than patients with undetectable blood levels. Blood levels tended (p = 0.070) to be correlated with clinical improvement. The authors discuss cultural attitudes of Southeast Asian refugee patients toward medication use and side effects that appear to influence medication compliance.

Adult↗