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Search Results: 1 - 10 of 1383 matches for " Katarzyna Ferdyn "
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Glutamate as a Neural Stress Factor in Humans and Animals  [PDF]
Bogdan Feliks Kania, Katarzyna Ferdyn, Tomasz Wojnar, Grzegorz Lonc
Journal of Behavioral and Brain Science (JBBS) , 2019, DOI: 10.4236/jbbs.2019.92002
Abstract: L-glutamic acid (glutamate-Glu) serves as one form with very strong stimulatory neurotransmitter (near aspartic, kainic, alpha-amino-3-hydroxy-5-me- thyl-4-izoxazole propionic acid (AMPA), chinolic and L-homocysteinic acid, glycine and D-serine) at the majority of neural excitatory synapse in the mammals and nonmammals central, sympathetic nervous system (CNS and SNS, respectively) and in different peripheral tissues and organ. It mediates interactions via stimulation a variety ionotropic N-methyl-D-As- partate (NMDA), AMPA and kainate receptors (ligand gated calcium channels) and III groups of the metabotropic glutamate receptors (mGluR1-8) family members (G-protein coupled receptors). It is good known different neuromodula-tion/interaction between Glu and norepinephrine (NE), dopamine (DA), gamma-amino-butyric acid (GABA), oxytocin/vasopressin (Oxy/AVP) and steroid receptors during stress in the central nervous system. In this review we describe the molecular structure of these glutamatergic receptors and discuss they neuropharmacology and clinical use probability of their antagonist, in stress particularly. On the other hand it was interesting if Glu can increase catecholamine (CA) release from motivational structures as stressoric factor in hypothalamo-pituitary adrenal axis (HPA) in the stress inducing processes. Our findings show that Glu more influences the brain’s motivational structure, which may indicate its contribution to the stress response by direct modulating the amount of catecholamine released.
The characteristics of the chosen mycotoxins and their toxic influence on the human and animal metabolism  [PDF]
Katarzyna Lazicka, Slawomir Orzechowski
Natural Science (NS) , 2010, DOI: 10.4236/ns.2010.26068
Abstract: Mycotoxins are toxic secondary metabolites of fungi belonging mainly to the Aspergillus, Penicillium and Fusarium genera. They can be formed in various agricultural produce in specific conditions. These natural and zootoxic chemical compounds cause an array of diseases in people and animals, i.e., mycotoxicoses. Depending on the type and dose, mycotoxins may cause liver, kidney, and lung cancers, as well as damage to the immune system, pathological changes in the nervous system, and reproduction disorders. Many mycotoxins disrupt digestion process, cause vomiting, nausea, anorexia, skin irritation and dermatitis, and even haemorrhages. A significant threat to the health of animals and people can be observed in the case of major infestation of crop ears from which foodstuff or feed are then produced. The ear infestation is facilitated by a suitable humidity and temperature during the growing season or while harvesting and storing the agricultural produce, which enhances the growth of mycotoxin-producing fungi. Suitable agricultural treatment, crop rotation, proper storing of crops in the conditions of limited humidity after the harvest as well as regular chemical analyses of the content of mycotoxins minimize their consumption and, accordingly, decrease the threat caused by these substances to the human and animal health.
LCA in Environmental Management Systems—Results of Individual Interviews with Selected Enterprises from Poland and Sweden  [PDF]
Katarzyna Joachimiak-Lechman
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.47080

Life Cycle Assessment (LCA) is an analytical tool used for the environmental optimization of products and services within the entirety of its life cycle. ISO 14040 recommends use of the technique in numerous areas of environmental management such as in designing for the environment, eco-labelling, environmental communications and the assessment of the effects of environmental activities. Despite being theoretically feasible, certain applications of the ecological assessment of a life cycle such as the possibility of identification and evaluation of environmental aspects with the use of LCA are, in practice, still new to many environmental managers. With its strong points, the technique seems to be a valuable tool, especially in the context of apparent concepts of Product-Oriented Environmental Management Systems (POEMS). In order to verify the hypothesis, the author decided to verify the level of use of LCA in the area of identification and assessment of environmental aspects in selected organizations. Therefore, questionnaire interviews were conducted with representatives of selected Polish and Swedish enterprises who, at the time of the interview, had certified environmental management systems. The organizations were analyzed with respect to applied methods and techniques used for identification and assessment of environmental aspects as well as the degree of use of LCA both in this respect and in other areas of environmental management. This paper will present the results of this research and conclusions.

Equivalent for Electromagnetic Transient Calculation in Power System with Multiple Transmission Line  [PDF]
Pawe? Sowa, Katarzyna ?uszcz
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.54B275

The results of searching of equivalent for electromagnetic transient calculation in power system with the big number of transmission lines are shown. Brief information on the proper transmission line model is given. Comparison of results of simulation in real and reduced system is presented taking into consideration three methods of identification. Some example are examined for different number of transmission lines in reduced system and consequently the recommendation are given for searching of equivalents of systems with many lines.

Identification of Modal Loss Factor of a Sandwich Composite Structure with Polyethylene Terephthalate Core in the Aspect of Core Properties Determination  [PDF]
Krzysztof Marynowski, Katarzyna Grochowska
Materials Sciences and Applications (MSA) , 2015, DOI: 10.4236/msa.2015.66051
Abstract: Comparison of the loss factor determination methods of the sandwich composite structure with polyethylene terephthalate core in the aspect of core material rheological parameters identification was the purpose of the study. Three frequency bandwidths n dB: 1 dB, 2 dB, 3 dB methods, the resonant amplitude method and the fit method of the response of the one degree of freedom model system are taken into considerations. Identification procedure, according to ASTM E756-2005 [1] based on experimental studies of the forced vibrations of the composite structure was presented in the paper. To determine the function of the complex shear modulus of the core material, the Nelder-Mead method is applied. Shear modulus and loss factor identification results were presented on the plots in the frequency domain. The results in a quantitative manner set the applied methods and their practical utility in order.
Dynamic Analysis of the Turnout Diverging Track for HSR with Variable Curvature Sections  [PDF]
Wladyslaw Koc, Katarzyna Palikowska
World Journal of Engineering and Technology (WJET) , 2017, DOI: 10.4236/wjet.2017.51005
Abstract: The paper presents an analytical method of identifying the curvature of the turnout diverging track consisting of sections of varying curvature. Both linear and nonlinear (polynomial) curvatures of the turnout diverging track are identified and evaluated in the paper. The presented method is a universal one; it enables to assume curvature values at the beginning and end point of the geometrical layout of the turnout. The results of dynamics analysis show that widely used in railway practice, clothoid sections with nonzero curvatures at the beginning and end points of the turnout lead to increased dynamic interactions in the track-vehicle system. The turnout with nonlinear curvature reaching zero values at the extreme points of the geometrical layout is indicated in the paper as the most favourable, taking into account dynamic interactions occurring in the track-vehicle system.
Antioxidant Properties of Medicinal Plants from Peru  [PDF]
Adam Ber?owski, Katarzyna Zawada, Iwona Wawer, Katarzyna Paradowska
Food and Nutrition Sciences (FNS) , 2013, DOI: 10.4236/fns.2013.48A009
Abstract: There is a wide diversity of plants and seasonal crops in Peru, due to the presence of many climatic zones. Numerous plants are used to cure or prevent diseases. These plants are promising candidates for functional foods products. The most frequent form in which they are used is an aqueous infusion or decoction. In this study, we compared the antioxidant properties of ten Peruvian plants infusions and investigated their relation to the phenolic content. The studied plants were: Uncaria tomentosa (cat’s claw), Lepidium meyenii (maca), Berberis vulgaris L. (barberry, agracejo), Phyllantus niruri (chanca piedra), Annona muricata L. (graviola, soursop), Gentianella alborosea (hercampure), Geranium dielsianum (pasuchaca), Tabebuia ochracea (tahuari), Notholaena nivea (“cuti cuti”) and Tiquilia paronychioides (“flor de arena”). Infusions of all studied plants have shown antioxidant activity, though there was a large diversity between the results. The antioxidant properties, determined with DPPH and ABTS scavenging assays as well as FRAP test, were strongly correlated with total phenolic content, while there was no correlation with the carotenoid content.
Clostridium bifermentansc as an Aero-Tolerant Exponent of Strictly Anaerobe Genera  [PDF]
Katarzyna Leja, Kamila Myszka, Mariola Olkowicz, Wojciech Juzwa, Katarzyna Czaczyk
Advances in Microbiology (AiM) , 2014, DOI: 10.4236/aim.2014.44028

Strictly anaerobic bacteria in the evolutionary way formed some mechanisms of oxygen tolerance. These changes enable strictly anaerobic bacteria existing in natural environment in which avoiding oxygen is not possible. Clostridium bifermentans is described as a strictly anaerobe species; however, in the literature, there is some information about its oxygen tolerance. Thus, in this work, the level of C. bifermentans aero-tolerance, its mechanisms, and the ability to metabolite production in presence of oxygen in cultivation medium were investigated. It was found out that C. bifermentans is able to survive in the presence of oxygen. Moreover, they are able to utilize oxygen and product metabolites when the level of oxygen is below 10%. In bacteria cells superoxide dismutase was detected.

Existence and uniqueness of solutions of a semilinear functional-differential evolution nonlocal Cauchy problem
Katarzyna Kolodziej
International Journal of Stochastic Analysis , 2000, DOI: 10.1155/s1048953300000186
Abstract: Two theorems about the existence and uniqueness of mild and classical solutions of a semilinear functional-differential evolution nonlocal Cauchy problem in a general Banach space are proved. Methods of semigroups and the Banach contraction theorem are applied.
Report on the Round Table Conference on Medical Care Management of Patients with Neurocutaneous Syndromes
Katarzyna Kotulska
Hereditary Cancer in Clinical Practice , 2005, DOI: 10.1186/1897-4287-3-1-49
Abstract: Currently, the Polish Neurocutaneous Syndromes Clinics Initiating Group consists of representatives of 3 centres in Poland (Warsaw, Bydgoszcz and Szczecin), which assembled the major number of patients with neurocutaneous syndromes within the last two decades. In the future, it is planned to extend the Group to include other centres involved in neurocutaneous syndromes in Poland.In the first part of the Conference, Professor Sergiusz Jó?wiak, Professor Mariusz Wysocki and Professor Jan Lubiński presented diagnostic and therapeutic standards in three most frequent neurocutaneous syndromes: tuberous sclerosis, neurofibromatosis and von Hippel-Lindau disease. They all emphasised that the knowledge about these syndromes in medical milieu is still insufficient and that regular control examinations in phakomatoses are required to diagnose neoplasms at their earliest stage.In the second part of the Conference, methods to improve medical care of neurocutaneous syndrome patients were discussed. Both family members and specialists stressed that specialised clinical centres resembling Phakomatoses Clinics existing in some countries are needed to establish comprehensive management of the patients. The problems with performance of control examinations (including CT and MRI scans), which are often expensive, were also raised. The lack of respective regulations of payment by the National Health Fund was pointed out among the reasons of insufficient number of these examinations.The possibility of creating national registers of selected phakomatoses, which could help to assess the exact frequency of these diseases in Poland, was also discussed. In many countries, genetic examinations are performed with respect to neurocutaneous syndromes; whereas in Poland, except for von Hippel-Lindau disease, such examinations are not available. This issue was discussed as well. Delegates of the National Health Fund declared that it would be possible to obtain individual promises of reimbursement
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