W Samborski

Poznan University of Medical Sciences, Posen, Greater Poland Voivodeship, Poland

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Publications (55)110.29 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper aims at the presentation of the results of in vitro research on the dielectric properties of the cornea specimen collected from the rats subjected to in vivo hypothermia. The average values of the relative permittivity and dielectric loss are about 40% higher for the hypothermic cornea than those for the normothermic tissue at the same water content of 12% for both samples and at 25°C. Whereas, at 50°C this effect of increase in the dielectric properties of the hypothermic cornea when compared to the normothermic one is observed clearly only in the relative permittivity of about 19%. In the temperature range of 25-50°C, the activation energy of conductivity associated with the release of loosely bound water takes the average values of 45kJ/mol and 30kJ/mol for the normothermic and hypothermic corneas, respectively. The study provided information on dielectric polarization and conductance mechanisms in the cornea which may be helpful in interpreting clinical results of human cornea examination, currently obtained by means of such electrodiagnostic methods as conductive keratoplasty, electroretinography or electrooculography.
    Bioelectrochemistry (Amsterdam, Netherlands) 09/2014; 101C:132-137. · 2.65 Impact Factor
  • Michal Ziarko, Ewa Mojs, Bartosz Piasecki, Wlodzimierz Samborski
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    ABSTRACT: Aim. Rheumatoid arthritis is one of the most severe chronic diseases. In many cases it leads to disability and results in a decreased quality of life and increased levels of anxiety and depression. The problem that needs to be addressed is the following: which mental processes lead to increased levels of depression in patients with rheumatoid arthritis? Methods. 210 patients with rheumatoid arthritis hospitalized in rheumatology wards took part in the research. They filled in illness perception questionnaires (IPQ-R) and questionnaires for testing strategies of handling stress (Mini-COPE) and the level of depression (CES-D). Results. The observed correlation coefficients indicate that several elements of the perception of one's disease moderately contribute to a high level of depression. Moreover, frequent use of dysfunctional coping strategies contributed to high levels of depression. Dysfunctional coping was moderately linked to depression. Conclusion. The conducted analyses confirmed the links between the beliefs about the disease and levels of depression and showed that the use of dysfunctional coping strategies mediates the relationship between the following elements of the representation of the disease: illness coherence, emotional representation, psychological attribution, risk factors, and the level of depression.
    The Scientific World Journal 01/2014; 2014:585063. · 1.22 Impact Factor
    This article is viewable in ResearchGate's enriched format
  • European Scientific Journal. 01/2014; 3:184-189.
  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper aims at the presentation of the results of in vitro research on the dielectric properties of the cornea specimen collected from the rats subjected to in vivo hypothermia. The average values of the relative permittivity and dielectric loss are about 40% higher for the hypothermic cornea than those for the normothermic tissue at the same water content of 12% for both samples and at 25 °C. Whereas, at 50 °C this effect of increase in the dielectric properties of the hypothermic cornea when compared to the normothermic one is observed clearly only in the relative permittivity of about 19%. In the temperature range of 25–50 °C, the activation energy of conductivity associated with the release of loosely bound water takes the average values of 45 kJ/mol and 30 kJ/mol for the normothermic and hypothermic cornea, respectively. The study provided information on dielectric polarization and conductance mechanisms in the cornea which may be helpful in interpreting clinical results of human cornea examination, currently obtained by means of such electrodiagnostic methods as conductive keratoplasty, electroretinography or electrooculography.
    Bioelectrochemistry. 01/2014;
  • J Med Sci. 01/2014; 2(83):182-188.
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    ABSTRACT: In obesity, elevated insulin resistance is observed, which may be associated with disturbances in mineral status in the body. The few studies concerning the status of minerals and their relationships with insulin resistance and body composition in adolescent populations have brought inconclusive results. of this study is, thus, to assess serum mineral concentration in obese adolescents, and to evaluate their potential association with insulin resistance. Seventy-eight obese adolescents and 20 healthy volunteers aged 12-18 years were recruited for the study. Selected anthropometrical measurements and levels of iron, zinc, copper, calcium, and magnesium were assessed in serum. Insulin resistance in the participants was evaluated according to the homeostatic model of assessment for insulin resistance (HOMA-IR) protocol. Levels of iron, zinc, copper, calcium, and magnesium were assessed in serum. Obese subjects had significantly higher HOMA-IR indices than the control group. Compared to healthy subjects, the serum concentration of zinc, calcium, and magnesium was significantly lower in obese subjects. A significant inverse relation was found between HOMA-IR and zinc levels in serum. Obese adolescents have a poorer mineral status (especially zinc) than adolescents of normal weight, which can contribute to insulin resistance.
    European review for medical and pharmacological sciences 09/2013; 17(17):2396-400. · 0.99 Impact Factor
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    ABSTRACT: Some data indicate a potential relationship between insulin resistance level and the concentration of osteoprotegerin (OPG) in the body. There have been few studies concerning OPG level and its relationship with insulin resistance and body composition in young people. The aim of this study was to assess serum osteoprotegerin concentration in obese adolescents, and to evaluate its potential association with insulin resistance. Seventy-eight obese adolescents and 20 healthy volunteers aged 12-18 years were recruited in the study. Selected anthropometrical measurements and blood biochemical analyses were performed. Insulin resistance in the participants was evaluated according to the homeostasis model assessment-insulin resistance (HOMA-IR) protocol. Level of OPG was assessed in serum. Obese subjects had significantly higher HOMA-IR indices and OPG levels in serum than the control group. A significant positive correlation between OPG and insulin resistance was found. It was observed that high concentrations of osteoprotegerin are associated with insulin resistance in obese adolescents.
    Journal of physiology and biochemistry 05/2013; 69(4). · 2.50 Impact Factor
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    ABSTRACT: In this study, we analyzed the effect of water and frequency on the dielectric properties of the nail plate in healthy individuals and in diabetic patients. The temperature dependencies of the loss tangent for both healthy and diabetic nail represent the relation between the electrical energy lost and stored in keratin-glucose-water complexes of this tissue. The differences between these materials concern the temperature ranges in which there appears the decomposition of loosely bound water. The effect of glycation on the loss tangent of the wet and the dry nail is supported by higher values of this parameter than in those describing the healthy samples in the whole temperature range and above 100°C, respectively. In addition, glycation lead to distinct increase in the dielectric relaxation decrement in permittivity and dielectric loss between the frequency of 500Hz and 100kHz for the wet and the dry nail. The results of this study indicate that the dielectric spectroscopy may be useful in observing the decomposition of water in the diabetic nail plate.
    Colloids and surfaces B: Biointerfaces 04/2013; 109C:143-146. · 4.28 Impact Factor
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    ABSTRACT: To assess whether epileptic children have abnormal values of some trace elements, the aim of this preliminary study was to assess the serum zinc (Zn), copper (Cu), iron (Fe), and chromium (Cr) concentrations in 23 children with initial recognition of epilepsy before beginning of pharmacological therapy in comparison with a healthy control group of 25 children, according to the gender. The study demonstrated that epilepsy decreases levels of Zn and Cr concentrations in all patients, and Fe level in girls, and increases level of Cu in all patients. The frequency distribution of these metals was significantly different in epileptic patients than in healthy subjects. There is a conclusion that status of trace elements in epileptic children needs to be monitored.
    Epilepsy research 10/2012; · 2.48 Impact Factor
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    ABSTRACT: The temperature and frequency dependencies of the dielectric parameters for the rat artery are used to analyse effects of hypothermia on this tissue. Measurements were performed over the frequency range 500Hz to 100kHz and at temperatures from 19 to 60°C. The artery samples contained about 12% water by mass at room temperature at a relative humidity of 70%. The frequency dependencies of the loss tangent for the control, mild hypothermic and moderate hypothermic artery exhibit two peaks at 2kHz and 35kHz in the α-dispersion region. The results were discussed in terms of the distribution of relaxation frequencies and the activation energy for the conduction and polarization mechanisms particularly in the elastin-water and collagen-water systems. The knowledge about dielectric behavior of the hypothermic rat artery in vitro is important due to clinical application of local and systemic hypothermia.
    Colloids and surfaces B: Biointerfaces 06/2012; 101C:1-5. · 4.28 Impact Factor
  • J Olszewski, E Marzec, M Kulza, W Samborski
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    ABSTRACT: In this work, we have carried out a dielectric study to determine the effect of tobacco smoke on the rat corneal function. Measurements were performed over the frequency range of 500 Hz-100 kHz in air and at the temperature of 35°C. The frequency dependencies of the loss tangent for both healthy and smoky cornea exhibit two peaks with different width occurring as a narrow at 2 kHz and a broad at around 16 kHz. The distribution parameter α at 2 kHz has a value of about 0.3, which increases to 0.6 at 16 kHz. The magnitude of the permittivity decrement at 2 and 16 kHz is about two and four times higher, respectively, for the smoky cornea than that for the healthy one. These dielectric studies indicate that the present method is useful in detection of the effect of tobacco smoke exposure on the corneal behavior.
    Colloids and surfaces B: Biointerfaces 02/2012; 90:109-12. · 4.28 Impact Factor
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    ABSTRACT: Anxiety remains one of the consequences of chronic diseases such as rheumatoid arthritis. High anxiety levels not only decrease the patient’s QoL, but also trigger anti-health behaviours and may adversely influence the course of the disease. The connection between neuroticism and anxiety has been well-documented so far. Neuroticism remains a temperamental trait so it is hardly modifiable. Reduction of psychological costs connected with high neuroticism entails the need to learn factors, which may limit the impact of neuroticism on anxiety levels (factors moderating the relation between anxiety and neuroticism). The aim of the study was to determine moderator variables of the relation between anxiety and neuroticism. The study involved 100 participants (78 women and 22 men), all of whom were RA patients. They were given a set of questionnaires to evaluate their anxiety levels, coping styles and personality dimensions. Pearson – r correlation analysis and moderator analysis of the relation between neuroticism and anxiety as a state mediated by coping styles were performed. The interaction testing was performed by way of the least-squares analysis and logistic regression. A directly proportional correlation was found between neuroticism and anxiety as a state (r = 0.63; p < 0.01) (Table I). This correlation was not observed in highly neurotic subjects using avoidant coping style (R2 = 0.19; F = 7.00; p < 0.001) (Fig. 1) and in avoidant social coping style subjects (R2 = 0.22; F = 8.70; p < 0.001) (Fig. 2, Table II).
    Reumatologia 01/2011; 49:162-168.
  • W. Samborski, E. Mojs
    European Neuropsychopharmacology 05/2009; 19. · 5.40 Impact Factor
  • European Psychiatry 01/2009; 24. · 3.21 Impact Factor
  • European Psychiatry 01/2009; 24. · 3.21 Impact Factor
  • E. Mojs, E. Gajewska, W. Samborski
    European Psychiatry 01/2009; 24. · 3.21 Impact Factor
  • E. Mojs, E. Gajewska, W. Samborski
    European Journal of Paediatric Neurology 05/2008; 12. · 1.93 Impact Factor
  • E. Gajewska, E. Mojs, W. Samborski
    European Journal of Paediatric Neurology 05/2008; 12. · 1.93 Impact Factor
  • E. Gajewska, E. Mojs, W. Samborski
    European Journal of Paediatric Neurology 05/2008; 12. · 1.93 Impact Factor
  • E. Mojs, E. Gajewska, W. Samborski
    European Psychiatry 04/2008; 23. · 3.21 Impact Factor

Publication Stats

216 Citations
110.29 Total Impact Points

Institutions

  • 1997–2014
    • Poznan University of Medical Sciences
      • • Department of Physiotherapy Rheumatology and Rehabilitation
      • • Department of Ophthalmology
      Posen, Greater Poland Voivodeship, Poland
  • 2012–2013
    • Poznań University of Life Sciences
      • Department of Human Nutrition and Hygiene
      Poznań, Greater Poland Voivodeship, Poland
  • 2005
    • Grodno State Medical University
      Gardinas, Hrodzyenskaya Voblastsʼ, Belarus