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The paper presents the importance of electricity parameters in transient states for assessing the ability of an aircraft's power grid to self-regulate. It has been shown that the quality of electrical energy of an aircraft's power system is influenced by its operating time. Aging changes resulting from long-term operation of the power system cause deterioration of electrical energy parameters, which directly affects airworthiness and flying safety. Maintaining standard energy parameters in transient states is very important to ensure proper operation of the aircraft. The article describes the method of measuring the quality of electricity in transient states, and using the example of the DC power system of the Su 22 aircraft, the essence of its network diagnostics in transient states is presented. Also presented are sample results of research conducted by the authors regarding changes in electrical energy parameters in transient states of the Su 22 aircraft, obtained during its many years of operation. [ABSTRACT FROM AUTHOR]

During the operation of aero-engines (turbine and piston engines), wear processes occur in tribological nodes, which significantly affect the reliability and safety of flight operations. This paper presents aspects of tribological diagnostics of aircraft engines based on periodic testing of lubricant samples in laboratories. Firstly, the object of research with its design features, operating parameters and used lubricants is presented, as well as the theoretical basis of tribological testing. This was followed by a description of the testing methods used in tribological diagnostics of aero-engines, taking into account lubricant degradation and contamination processes, standards, testing methodologies and operating experience described in the literature, including the machine failure curve. Next, the capabilities of the testing methods are illustrated with results from periodic tribological testing of turbine engines, obtained at an accredited tribological systems diagnostics laboratory. In the following section, the role of trend analysis and statistical criteria in the process of diagnosing and managing the risk of operation of aero-engines, exploited according to both their technical condition and planned maintenance, was indicated. Then, the possibility of improving the reliability of tribological diagnostics of aero-engines on the basis of experience from industry - real-time monitoring of selected tribological parameters - was signalled. In conclusion, the high efficiency and role of tribological diagnostics in maintaining the operational safety of a fleet of different aircraft types is indicated. [ABSTRACT FROM AUTHOR]

Acute renal failure is one of the most important complications of the vascular and radiological procedures. An increasing number of the patients undergoing contrast based procedures, advanced and increasing age of the population as well as presence of diabetes and common use of the radiological procedures in many medicine disciplines implicates the need of the pre- and postprocedure control of the renal function. The literature described rate of the acute renal failure related to the contrast administration ranges from 1-13% depending on the treated population. In the paper the literature review concerning the risk of renal failure as well as its protection possibilities in the patients undergoing vascular contrast based procedures are presented. The review was supported by own authors observations. The risk assessment as well as renal failure complication prevention after vascular procedures should be an integral element of the qualification as well as perioperative management. [ABSTRACT FROM AUTHOR]

Background. lung cancer is the most common cause of morbidity and mortality among all cancers. The dominant type of lung cancer is non-small cell lung cancer. early diagnosis, rapid and least possible invasive treatment gives the best chance to extend life expectancy. Considering increasing level of NSCLC morbidity it is extremely important to develop cancer diagnostics, which will allow to implement necessary treatment in early stages. Objectives. The main focus of this paper is to establish level of usability for dimeric form of the pyruvate kinase in NSCLC patient plasma using spectrophotometric method. Material and methods. Participants of the study were chosen from patients of the lower silesian lung disease Centre in Wroclaw. Patients were allocated in to two study groups: first containing patients who were diagnosed with adenocarcinoma, second containing patients who were diagnosed with carcinoma planoepitheliale. The control group was chosen from patients who were not diagnosed with cancer. material in question was plasma, tested on pyruvate kinase activity. Results. Analysis showed a difference in pyruvate kinase activity between patients in study groups and test group. The highest increase in enzyme activity was found in group of patients diagnosed with carcinoma planoepitheliale (134.5%). in the group of patients diagnosed with adenocarcinoma enzyme activity increase reached 132.1% and in test group, 116%. Conclusions. Testing enzyme activity of pyruvate kinase can be an additional helpful method in NSCLC diagnoses, besides diagnostic imaging. This method is characterised by high sensitivity and low invasiveness. [ABSTRACT FROM AUTHOR]

Anaphylaxis is a severe, life-threatening systemic or generalized immediate hypersensitivity reaction. The incidence of anaphylaxis has increased significantly over the past 20 years. Foods are the most common cause of anaphylaxis. The paper discusses the epidemiology of food-induced anaphylaxis and pathomechanism with particular reference to the role of PAF (platelet-activating factor), its diagnosis and treatment according to international guidelines. [ABSTRACT FROM AUTHOR]