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Background. Superior mesenteric artery syndrome (SMAS) is a rare disease caused by the acute angle of branching of the superior mesenteric artery from the aorta. Material and methods. There were 63 patients (56 women and 7 men) with low body weight, who reported recurrent persistent abdominal pain, nausea, post-prandial vomiting, significant weight loss. All of them had abdominal ultrasonography performed with measurement of the angle of branching of SMA from the aorta. CBC, total bilirubin, AST, ALT, GT, ALP, amylase, lipase, albumins, iron, sodium, potassium, GFR, lipid profile, TSH, urinalysis were ordered. Additionally, esophagogastroduodenoscopy with Hp. test and esophageal impedance measurement in correlation with the reported ailments was performed. Results. Acid reflux impedance was diagnosed in 10 patients. There were >55 acid reflux episodes per day and a positive reflux sign (SI) for heartburn and nausea. Abnormal impedance recording of acid reflux was diagnosed in 17 patients. They had >21 episodes of non-acid reflux per day. Positive reflux sign (SI) was not confirmed for any non-acid reflux-related symptoms. Conclusions. It is justified to perform impedance pH monitoring in this group of patients as it allows to modify the therapy. The most important dietary recommendations are weight gain and understanding the cause of the disease.
Capability and limitations in laboratory determination of stiffness parameters of soils. The paper concerns laboratory methods for determination of soil stiffness. Major criterion for selection of analysed equipment is range of strain in which stiffness can be reliably determined. Substantially, various confi gurations of triaxial apparatus are referred to i.e. with standard cell and with the modifi ed one. Additional system for internal measurement of strain is described and rational (based on test results) for use of it is presented. As to shear wave velocity measurement as a mean to obtain initial stiffness, requirements for proper measurement and interpretation was given. Finally, an approach to determine Poisson’s ratio on the basis of combined results of cyclic triaxial and resonant column tests was presented.
Introduction. Results of laboratory tests could be treated as a valuable source of information about players’ physical fitness. Aim of Study. The purpose of this study was to identify laboratory physical fitness tests that could be useful for predicting competences of 17-year-old soccer players. Material and Methods. Selected components of players’ physical fitness were assessed and the effectiveness of game performance was evaluated in a group of eighteen young soccer players. The following parameters were measured: anthropometric measurements, anaerobic and aerobic capacity, locomotion speed, explosive strength of the lower limbs, reaction time, and balance. Results. The results achieved in laboratory and exercise tests were converted into ranks. An assessment of players’ effectiveness in one-on-one games was made using special oneon-one test methodology, and a list of ranked game performances was prepared. On the basis of observations made by three independent experts, the participants were classified according to their “usefulness” for the game using the Game Performance Assessment Instrument (GPAI). The ranking assessment of the effectiveness of one-on-one games and of a classified game was correlated with the results of laboratory tests. It was found that players with the highest scores in locomotion speed tests and in the explosive leg power test were also highly assessed by the experts with regard to the efficiency of their performance in one-on-one games as well as, to a slightly lesser degree, in the classified game. There was no significant relationship between the expert assessment of “usefulness” for the game and other tests. Conclusions. On the basis of strength-speed test results we may satisfactorily predict young soccer players’ efficiency of game performance.
The aim of this work is to assess the possibilities of numerical simulation of the industrial slurry sedimentation process using ANSYS CFX software. Our work focused on the analysis of the simulation models available in the CFX module of the ANSYS to run the simulation of sedimentation based on the results of laboratory tests.
The hydraulic conductivity of zero-valent iron treatment zone of permeable reactive barriers (PRBs) may be decreased by reducing the porosity caused by gas production and solids precipitation. The study was undertaken in order to evaluate the influence of chloride and heavy metals on the hydraulic conductivity of ZVI and nZVI using hydraulic conductivity tests as well as continuous column tests. Results show that the lead retention in the solution had no impact for hydraulic conductivity in ZVI sample, on the other hand the calculated hydraulic conductivity losses in nZVI sample (from 4.10·10–5 to 2.30·10–5 m·s–1) were observed. Results also indicate that liquids containing the mixture of heavy metals may cause signifi cant decrease in hydraulic conductivity (from 1.03·10–4 to 1.51·10–6 m·s–1). During the column tests, several number of clogging of the reactive material caused by iron hydroxides precipitation was observed over the course of injection of heavy metals solution. In contrast, the hydraulic conductivity of ZVI and nZVI is unaffected when they are permeated with chloride ions solution (k = 1.03·10–4 m·s–1). Finally, the results indicate the need to take account of changes in the hydraulic conductivity of reactive materials for successful implementation of PRBs technology.
The paper presents results of estimating the technical state of spray nozzles placed on a spray boom hanging over a patternator. Results of laboratory tests were analyzed considering the criteria of estimation binding in Poland in reference to electronic and manual patternators. Theoretical considerations are used to determine the equivalence of those criteria.
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