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Changes in physical properties of wood damaged by activities of wood damaging fungi
Frankl, Jiří
Abstract: This paper presents results of experimental, laboratory establishment of the extent of changes in physical properties (swelling, water absorbability) of timber (spruce) damaged by the activity of wood-damaging fungi. The experiment was carried out using standard test samples (20 x 20 x 30 mm) prepared from new timber and subsequently exposed to the activities of wood-damaging fungi (Serpula lacrymans, Trametes versicolor) under optimal growth conditions for the period of 15 to 60 days. Changes in physical properties were observed in the damaged samples as per the CSN 490126 and CSN 490104 Czech National Standards. The experiment proved significant changes in the observed properties depending on the fungi type and duration of the activity thereof.
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Evaluation of the effectiveness of teaching vocational subjects depending on physical activity before schooling.
Janošíková, Martina ; Hanušová, Marie (advisor)
The period of transition to secondary school brings substantial changes in the requirements for study obligations, autonomy, communication, expression, or separated from their families in the form of staying at the dormitory. Students enrolled in sport centers, in addition to these changes, still struggling with the responsibilities associated with sport. Because they are students first through fourth grades of secondary schools and secondary vocational schools, an age when image self-I am, what I believe in, arises in interactions with the outside world and their own experience, plays a very important role to influence the environment, educators, teachers and trainers, with which students spend most of their time in practice. This study looks at students comprehensively in terms of personal development as a multifactorial biopsychosocial unit, in terms of cognitive and motivational processes, states and properties from the perspective of social psychology dealing with the interactions, relationships and communication, psychology of individuals within the social group and its importance for the development of the individual . It monitors conditions and educational outcomes in terms of educational psychology, dealing with forming properties, opinions, attitudes and value orientation from the perspective of educational psychology.
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Individual human odor as a forensic trail in criminal proceeding made by contact or contactless transmission and its resistance to physical agents
Santariová, Milena ; Bartoš, Luděk (advisor) ; Chmelíková, Eva (referee)
The dissertation thesis consists of four papers that have been published in scientific journals.
Study n. 1
The need to recover evidence from water is quite common in criminal investigation. The article deals with the possibility to collect human scent from such objects and with the ability of specially trained dogs to match such scent samples with scent samples collected from detained suspects. During an experiment, designed as a blind one, it has been proved, that human scent can survive on submerged objects and can be later used for scent identification.
Study n. 2
To collect odors the Czech Republic Police use special fabric sorbents manufactured under the registered mark ARATEX. Before use the fabric sorbent is treated by water vapor sterilization. After the scent identification the sorbent is destroyed. The goal of the study was to verify if the vapor sterilization is effective enough to remove human scent that has already penetrated into the sorbent structure or in other words if the sorbent can be exposed to vapor sterilization and then used again. Specially trained dogs were used to match starting odors with target odors in the line-ups. The results showed that dogs are able to correctly match human odors even after they have being exposed to vapor sterilization.
Study n. 3
The purpose of the study was to determine the temperature at which the human scent is degraded so that a dog would not be able to identify it. In contrast to expectations, eight dogs used in the experiment almost flawlessly identified human scents from five scent donors exposed to temperatures of 100°C, 200°C, 300°C, 400°C, 500°C, 600°C, 700°C, and 800°C. Only two of the dogs were able to identify 5 of 15 scent samples exposed to 900°C. No dog identified a scent exposed to 1000°C. Our study verified heat survivability of human scent far beyond existing expectations.
Study n. 4
We tested the hypothesis that if odor fallout (the release of a human odor onto an untouched object) in human subjects exists, then holding a hand above an absorbent will produce a detectable scent which will be subsequently matched in a detection test by trained dogs. Scents were collected from seven males to sterile cotton absorbent squares. The left hand was used to get the control scent and the right hand served as the target scent. Each experimental subject was sitting and his left hand was laid down on a cotton square for 3 min. The right hand was held 5 cm above another cotton square for 3 min. The scent identification was done by two specially trained police German shepherds. Both dogs performed 14 line-ups and correctly matched the collected scents of all test subjects. The results suggest the existence of human odor fallout, whereby a human scent trace is left by humans even if they do not touch an object.
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Total contents and speciation of arsenic and selenium in plants growing in soils with different physico-chemical properties
Tremlová, Jana ; Száková, Jiřina (advisor) ; Vymazal, Jan (referee)
This dissertation thesis deals with uptake, accumulation and transformation of arsenic and selenium in plants growing on soils with different chemico-physical soil properties. The contents of arsenic were investigated in 99 wild plant species, coming from 27 different families and 6 different vegetables growing in arsenic contaminated soils. The results suggest that there are species-specific mechanisms which protects certain plants from the excessive uptake of arsenic from the soil. On the other hand, there are plants using a strategy of accumulation, which theoretically may increase the risk of arsenic entry into the food chain, whether through grazing cattle and wildlife or through consumption of vegetables growing on arsenic contaminated soils. The most prevalent arsenic compounds are AsV and AsIII. Other arsenic compounds occure as minor species. An important finding was detection of arsenobetaine in Plantago lanceolata L. and Carex praecox Schreb ..
The contents of selenium were examined in 73 species of wild plants, coming from 29 different families. The results suggest that naturally low levels of selenium in the soil of selected locations along with a low capability of selenium uptake via collected plant species lead to the low content of selenium in plant biomass which may contribute to selenium deficient throughout the food chain. Foliar application of selenate on wild plant communities and on some types of vegetables in our case Brassica oleracea var. italica can have a positive impact on increasing the selenium content in the aboveground biomass of these plants and by extension, increase the selenium content in the human diet. Dominant selenium compounds in the aboveground biomass of the analyzed plants were SeVI and selenomethionine, with variable proportion of other commonly occurring organic selenium compounds, which is mainly affected by plant species.
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Inclusive education opportunities for children with physical disability in nursery schools in South Bohemian region
HAIDEROVÁ, Lenka
This thesis focuses on inclusive education of children with physical disability in nursery schools in South Bohemian region. The authoress describes in theoretic part of its thesis individual kind of congenital and acquired physical disabilities, next she compares inclusive education with integration and present situation of inclusive education in Czech Republic, including looking at this education in the past. She writes about child development in preschool age too, and this of aspect his motor and cognitive development, socialization in nursery school and about specialty children's psychology of a child with physical disability, which differs from development healthy child. In practical part the authoress concentrates on the opinions of selected educational staffs (teacher) and parents regarding this phenomenon in education. Research sample contains nine respondents, of which five teachers and four parents, for teachers were prepared eleven questions and for parents nine. She used as a method of research semi structured interview, that she could ask for details and digress from prearranged question. The authoress wanted to know with this research, if these two groups would be willing to support this education and what they are the reasons for this. Next she ascertained attitudes of parents of children with physical disability and benefit of this education for children with physical disability and for other children, healthy. She donated to compare these opinions between educational staffs and parents too. Finally, she tries to compare opinions between educational staff and parent from one nursery school.
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Lifestyle of patients with peripheral arterial disease before and after surgery
REZKOVÁ, Helena
Theoretical background: Peripheral arterial disease is a serious disease of Loir limb arteries which originates from atherosclerosis. The theoretical part deals with the lifestyle. There are mentioned basic risk factors of chronic forms. Further described are the pathophysiology changes generated on the basis of atherosclerosis and related causes for the origin of the disease. Subsequently there are explained methods of classification, developed clinical symptoms, diagnosis and therapy. This section also looks at the role of a nurse in the care of patients with peripheral arterial disease. Objectives: The aim of this work was to evaluate how patients with peripheral arterial disease changed their lifestyle after invasive vascular surgery. There were provided the following research questions: How do patients with peripheral arterial disease approach to the prevention of risk factors? What is in patients with peripheral arterial disease the main impuls for the possible change of their lifestyle? What influences surgery patient's attitude to risk factors for peripheral arterial disease? How crucial is a lifestyle change in patients after surgery for peripheral arterial disease? Methods: The theoretical part is processed using expert sources. The empirical part of the theses was processed using qualitative research. The chosen technique for data collection was semi-structured interviews with patients, with prepared open questions. The research was done in several phases - the first interview was conducted at the patient admission department (before surgery), followed by the next phase after three months, and 6 months after surgery. The interviews were recorded on a prepared form, then transcribed into electronic form and analyzed by open coding method. Results: The research showed that surgery can sometimes be triggered by changes in the patient's lifestyle. The first interviews in the preoperative period focused on how respondents felt, what was their lifestyle before surgery for atherosclerotic changes of the lower extremities. One of the questions was focused on patient knowledge about risk factors for the development of PAD and possible prevention. The second phase of interviews took place 3 months after the surgery. It dealt with the question about the respndents´ lifestyle, the respondents in the postoperative period, whether there were any changes. Some positive changes occurred in eating and there were some changes in doing physical activity. The third stage was carried out six months after surgery, again in order to detect changes in lifestyle. Minor changes came in smoking habits, the issue of diet and physical aktivity. Questions were also focused on the psychological level. We found out who helped patients and what was most motivating in implementing changes. In the conclusion/summing up question the patients marked themselves ow they managed to make a change. Conclusion: The number of patients with peripheral arterial disease and other cardiovascular diseases is increasing. The basis is the start to modify risk factors, namely tobacco use,dietary habits, physical activity. The medical staff members participate on changes in patients´ lifestyle by appropriate education. The problem occurs when the patient despite the support of close people can not cope to carry a twist in their life. There should a medical staff member offer a professional help to deal with this important step. Practical use: The aim is to draw attention to the expansion of education about lifestyle changes for patients diagnosed with PAD also in the postoperative period. Patients who are released to home care should receive enough information that would convince them to change their attitude towards their health, and that surgery is only one of the ways to prevent further attacks and complications. Results can improve communication with patients and focus on increasing their awareness and possibly offer assistance.
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Role of physical activity in the prevention of childhood obesity
VRTALOVÁ, Jana
The thesis deals with physical activity in the prevention of childhood obesity. It is focused on children, namely pupils of the eighth and ninith grades of elementary school. Obesity is responsible for more human lives than both of the world wars and if we want this epidemic of obesity and problems associated with inactivity minimized, we have to start where it is most efficient and that is with children. The main objective is to explore physical activity in a selected group of pupils. Partial aim is to determine the prevalence of overweight and obesity in the investigated group of students using somatometric measurements in the selected location. Another objective is to determine how many of childrens parents did sports in the past or actualy do sports. The final goal is to prepare educational material for students about the importance of physical activity. The work is divided into two parts theoretical and practical. The theoretical part was compiled as a secondary data analysis. Sources of data and information originated from the Czech Republic and abroad in the form of scholarly books, journals and electronic resources. The contents of the theoretical part is focused on explenation of terms such as obesity, its consequences, complications, ways to prevent obesity, physical activity, appropriate kinds of physical activity and its effects on the human body. Distinctive part is the chapter dealing with the myths of obesity some of them are really surprising. The second part is practical part and includes its own research. The investigation was conducted in a primary school Komenského alej in Žatec for pupils of the eighth and ninth grades. File featured 107 pupils. The research was conducted as a quantitative survey complemented by measurements of somatometric indicators. The data were collected using a custom non-standardized questionnaire. The questionnaire contained 14 questions and two columns separated by line for recording the exact weight and height. We checked these data at pre-agreed periods.
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Management styles and their relation to the satisfaction of employees
GRAMANOVÁ, Kamila
Abstract - Leader empowering behaviours and their relation with worker's satisfaction Current state: Nurse's work is physically and mentally demanding. Adequate knowledge and skills are also needed. Nurse managers whose leader empowering behaviours administer to good functioning of medical institutions have therefore a crucial role. In these days a monitoring of job satisfaction is an upcoming matter. According to that we can look for drawbacks and problems and take corrective actions. There is a 9th year of the nationwide research of safety and satisfaction of employees of Czech hospitals. Aim: The first aim of the research was to find out what leader empowering behaviours are used the most by nurse managers. The second aim was to find out how leader empowering behaviours influence satisfaction with work conditions of nurses. Two hypotheses were given. The first hypothesis postulated that nurse managers use democratic empowering behaviours the most. The second hypothesis postulated that satisfaction with work conditions of nurses is changeable, depending on leader empowering behaviours. Methodology: A quantitative method of data capture was chosen. Non-standardised questionaires with 30 closed questions were given out. There were four questions at the beginning to identify respondents. Other set of 15 questions was focused on recognition of leader empowering behaviours. Satisfaction with work conditions was monitored in the last set of questions. Results of the research were processed into graphs and tables. Research set: The research set included nurses working under nurse managers in inpatient wards in České Budějovice a.s. hospital. The questionaire was appropriately filled in by 112 nurses, corresponding 74,7% recoverability. This was used to complete the aim of this thesis. Results: Results of the thesis were divided into two sets. The first set of questions aimed on leader empowering behaviours of managers under whom the questioned nurses of particular departments work. Democratic empowering behaviours were evaluated the most used, according to the first hypothesis. The second set of questions aimed on satisfaction with work conditions. The highest job satisfaction was reached with democratic empowering behaviours. Autocratic, liberal and nonspecific empowering behaviours were used in minimal degree and nurses reported lower job satisfaction among these behaviours. Therefore the second hypothesis was also confirmed. Conclusion: The research pointed out that leader empowering behaviours are one of the factors that influence job satisfaction. It is positive thing that an interest and research in this area increased in the last decade. Periodic evaluation of job satisfaction enables monitoring the direction of its values. According to the survey, a newsletter with recommendations for nurse managers was formed. This newsletter pointed out pros and cons of leader empowering behaviours.
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Iniciace pohybu byčíku, signalizace a regulace pohyblivosti spermií ryb: fyzikální a biochemické řízení
PROKOPCHUK, Galina
The current study attempted to shed light on the regulatory processes and response arrangements of fish spermatozoa during the course of maturation and motility initiation. The first intent of this study was to improve the understanding of the mechanism underlying the acquisition of potential for sperm motility in sturgeon. Up to present work, the physiological process underlying sperm maturation in this species has not been described at all. Our results showed that sperm maturation in sturgeon occurs outside the testes because of dilution of sperm by urine and involves the participation of high molecular weight substances as well as calcium ions present in seminal fluid and/or urine. The second aim of the present study was to investigate the coping mechanisms in fish spermatozoa with osmotic and ionic activating mode, as well as in spermatozoa of euryhaline fishes, to various environmental conditions. We showed that alteration of environmental osmolality might affect the fish sperm in different ways, depending on fish species and modes of spermatozoa motility activation either osmotic or ionic mode. In response to osmotic stress caused by hypotonicity, carp spermatozoa regulated the flow of water across their cell membrane and increased their cytoplasmic volume during their short motility period. In contrast, no indications of sperm volume changes were observed neither in sterlet nor in brook trout spermatozoa, both of which having an ionic mode of motility activation. We also examined the mechanism by which sperm motility triggering in euryhaline fishes can adapt to a broad range of environmental salinity. Our results demonstrated that spermatozoa of euryhaline tilapia, Sarotherodon melanotheron heudelotii, reared in fresh-, sea- or hypersaline water can be activated in hypotonic, isotonic or hypertonic conditions of swimming milieu, provided Ca2+ ions are present at various levels. It was established that the higher the fish rearing salinity or the more hypertonic ambient media at spermatozoa activation, the higher extracellular concentration of Ca2+ ions is required. The results obtained in the present study allow suggesting that osmolality is not the main factor inhibiting sperm motility inside the testis in the S. melanotheron heudelotii. A third aim of this study was investigation of the regulation of motility initiation process and description of flagellar beating initiation in chondrostean spermatozoa. We detected that K+ inhibition of sperm motility in sturgeon can be by-passed due to the pre-exposure of sperm cells to a high osmolality shock prior to its transfer to K+-rich swimming media. Thus, we hypothesized that sturgeon spermatozoa may be activated by use of an unexpected signaling pathway, independent from regular ionic stimulation. The successive activation steps in sturgeon spermatozoa were investigated by high-speed video microscopy, using specific experimental situation, where sperm motility initiation was delayed in time up to several seconds. At motility initiation, the first couple of bends formed at the basal region begins to propagate towards the flagellar tip, but gradually fades when reaching the mid-flagellum. This behavior repeats several times until a stage where the amplitudes of bends gradually reach similar value, what eventually leads to sperm progressive displacement. The total period needed for the flagellum to switch from immobility with rigid shape to full activity with regular propagating bends ranges from 0.4 to 1.2 seconds. In conclusion, the results of the current study bring valuable pieces of information into the general understanding of the processes of maturation of fish spermatozoa, their adaptability to different physical and biochemical circumstances, the extra- and intra-cellular signaling as well as the regulatory mechanisms of motility activation in fish spermatozoa.
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