Publications by authors named "Pleva J"

Anti-programmed cell death protein 1 (PD-1) therapy is considered effective in the treatment of metastatic or locally advanced cutaneous squamous cell carcinoma but the use of these agents in solid organ transplant recipients (SOTRs) is often taken with caution. While anti-tumor effects without graft rejection have been reported, studies have shown high rates of fatal graft rejection with immune checkpoint therapy. In this case report, we present an SOTR patient with life-threatening, acute hypoxic respiratory failure due to rapidly progressive metastatic cutaneous squamous cell carcinoma with lung and pleural involvement.

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Accumulation and metabolic profile of phenolic compounds (PheCs; serving as UV-screening pigments and antioxidants) as well as carbon fixation rate (A) and plant growth are sensitive to irradiance and temperature. Since these factors are naturally co-acting in the environment, it is worthy to study the combined effects of these environmental factors to assess their possible physiological consequences. We investigated how low and high irradiance in combination with different temperatures modify the metabolic profile of PheCs and expression of genes involved in the antioxidative enzyme and PheCs biosynthesis, in relation to photosynthetic activity and availability of non-structural carbohydrates (NSC) in spring barley seedlings.

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Perfectionism is known to be a risk factor for the development and maintenance of obsessive-compulsive (OC) and depressive symptoms. The purpose of the present study was to test the effectiveness of a cognitive-behavioural self-help therapy for perfectionism, and to examine the effect of such treatment on OC and depressive symptomatology. The study compares the effectiveness of guided self-help (GSH, n=24) with pure self-help (PSH, n=25) therapy.

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Perfectionism and inflated responsibility have both been identified as risk factors for the development and maintenance of obsessive-compulsive (OC) symptoms. The aim of the present study was to test whether the relationships between these two variables and OC symptoms are mediated by the misinterpretation of intrusive thoughts (MIT). Three hundred and three university students completed the Frost Multidimensional Perfectionism Scale, the Maudsley Obsessional Compulsive Inventory, the Responsibility Attitude Scale, and the Responsibility Interpretations Questionnaire.

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For food evaluation, the determination of the number of Staphylococcus aureus colonies is insufficient in the view of present scientific knowledge. The results, advantages and disadvantages of diagnostic methods are demonstrated on an example of three methods of detection of staphylococcal enterotoxins in milk and milk products. 133 strains were investigated with the method of biotyping of Staphylococcus aureus strains.

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In recent years quality of all raw materials processed by agricultural-food industry complex has been influenced by penetration of contaminating hazardous substances into the food chain as a result of high chemization, as well as by the exhalation fall-outs of industrial enterprises. In our study we followed the cumulation of nitrates and nitrites in food and raw materials of animal origin in the exposed industrial area of East Slovak Ironworks in Kosice. Determined were the residual levels of nitrates and nitrites in meat and organs of slaughterhouse cattle, milk and water from individual agricultural enterprises.

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Dental mercury--a public health hazard.

Rev Environ Health

August 1994

The aim of this review is to point out the health hazards of the uncontrolled global use of implanted mercury-leaking dental amalgam fillings. In spite of the pandemic use of amalgam, most dentists and doctors are still ignorant about the levels of mercury exposure and its health implications. This review discusses the following chronically neglected aspects in clinical practice: The use of materials science in calculating the mercury exposure levels, which may exceed the TLVs by an order of magnitude; Microbial dissolution and methylation of mercury from amalgam by oral and intestinal bacteria; Diagnostic problems and effects of chronic mercury exposure with emphasis on intestinal, cardiovascular, mental and neurologic symptoms and disorders; Diagnostic value of faeces--instead of urine examination--as the main indicator of Hg exposure; Lack of control groups unexposed to Hg (amalgam free) for epidemiologic investigations of health problems; Contribution of dental mercury to environmental pollution.

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Changes of methaemoglobin levels were investigated in the blood of suckling calves. Transrenal passage of nitrates was determined in dependence on the ingested amount of nitrates. The experiments were conducted under defined husbandry conditions; no excessive nitrate and nitrite supplementation of the calves by feeds and water could be stated.

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The risks of mercury exposure arising from the use of dental amalgam fillings are reviewed and discussed. On the basis of both knowledge acquired in various scientific disciplines and ten years of experience in the field it is concluded that mercury from amalgam may well contribute significantly to a number of modern health problems and to decreased quality of life in a large population group in many countries. Erroneous opinion as to "negligible" mercury exposure and lack of cooperation between the dental, medical and other professions are two important factors in the issue.

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Using an interdisciplinary approach, the current position in the dental amalgam controversy and the potential impact of amalgam mercury on human health are reviewed. Aspects of materials science, corrosion, mercury exposure, toxicology, neurology and immunology are included. New data on mercury exposure from corroded amalgam fillings in vivo are presented.

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Microbial quality of mechanically deboned beef (MDB), which was obtained by the discontinuous hydraulic horizontal separator, type Inject-Star (firm LASKA, Austria), was analyzed for the presence of indicatory microorganisms (coliforms and enterococci), pathogenic and conditionally pathogenic microorganisms. The basic microbial parameters have been determined separately for MDB of 1st, 2nd degrees as well as for average daily samples from one collecting vessel. Apart from it, also a raw material (beef from flesh bones intended for separation) and salt MDB after 24 hrs storing in chiller before working it into meat products were examined by the same way.

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The occurrence of qualitative changes in meat was studied in a set of 1008 pigs slaughtered in four sanitation slaughter houses for the period of 12 months. PSE meat was found in 206 pigs (20.43 per cent) and DFD meat only in 9 pigs (0.

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Differences were studied in detecting residues of inhibitory substances in tissue samples of pigs and calves after emergency slaughter. Samples of liver, heart, kidney and muscle of 30 pigs and 16 calves were examined. Solid samples of organ tissues placed on an agar medium and extracts of the solid samples placed into agar pits were used for detection.

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A bioassay was made on male SPS Norway rats of the Wistar strain to study the biological value of PSE meat protein in a ten-day trial. Pork meat of m. longissimus dorsi was denoted as PSE meat on the basis of low pH1 values, colour and water content.

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