|
|
Water soluble foundry binders with heat dehydratation hardening
Šebesta, Pavel ; Rusín, Karel (referee) ; Cupák, Petr (advisor)
Environmental pressure on foundries has forced manufacturers to develop new organic and inorganic binders. One of the options is water soluble binders that can be hardened by dehydration. In addition to tenacity characteristics and regenerability of the forming mixtures another considered aspect is the amount of emissions generated by casting. Use of these new binders does not require expensive modifications of the machines for work with the forming mixtures.
|
|
|
Water soluble foundry binder with heat hardening
Prokop, Tomáš ; Burianová, Klára (referee) ; Cupák, Petr (advisor)
Foundry production produces the biggest amount of dangerous waste, which has a negative impact on environment and working conditions in the foundry. The foundry engineers test new technologies of shaping mixtures with new binders to protect environment and working conditions. We can reduce the production of dangerous waste by using better technologies and less harmful materials, which are needed for modeling forms and cores. The large source of pollution are binders, hardeners and catalyzer needed for binding sand. This work is focused on new types of ecological binders, which are dissolvable in water and are formed by setting temperature. These binders are ecological variants of known inorganic and organic binders.
|
|
|
Possibilities of waste glycerol reprocessing
Hýža, Bohumil ; Friedl, Zdeněk (referee) ; Kizlink, Juraj (advisor)
The aim of my bachelor thesis is to describe the possibilities of waste glycerol reprocessing. The thesis is purely theoretical and the information were obtained from various literary sources. Introduction of the study deals with the technological aspects of production of biodiesel by esterification of vegetable oils with methanol. Futhermore, there is described the amount of biodiesel produced in various countries around the world. In the theoretical part of the study are mentioned physical and chemical properties of glycerol and its traditional uses include the manufacture of nitroglycerin, the pharmaceutical use, etc. There are presented different technological methods for processing large quantities of glycerol too, such as steam reforming, which generates syngas which can be used for production of liquid fuels via Fischer-Tropsch synthesis. There is also desribed reduction of glycerol to propylene glycol with hydrogen. Other methods are dehydroxylation of glycerol to 1,3 - propanediol, halogenation of glycerol to produce epichlorohydrin, the catalytic dehydration of glycerol to acrolein and 3-hydroxy-propionic aldehyde, oxydehydration to polyacrylic acid, glycerol butylation over the Amberlyst catalyst and the formation of glycerol-tert-butyl ethers used as additives for fuels , polymerization of glycerol to polyglycerols, glycerol hydrothermal conversion to lactic acid catalyzed by alkali, esterification of carboxylic acids and glycerol to form glycerol esters, selective oxidation of glycerol to glyceric acid, tartronic acid and dihydroxyacetone, and glycerol as an additive for cement.
|
|
|
Drinking regime of the primary school children in the South of Bohemia
SOBÍŠKOVÁ, Pavla
This bachelor thesis is dedicated to a drinking regime of children in primary school age. The theoretical part deals with the function and composion of the water as the most important aspect of human life and nutrition. This part of also contains a recommended daily fluid intake in children. Attention is also paid to dehydration. The practical part is based on analysis of the defined assumptions that are proved by questionnaire survey. The main objective of the practical part is to discover the drinking habits in children, if children prefer to sweet drinks to water and if they have an awareness of dehydration.
|
|
|
Water and its role in nutrition and health promotion.
BENEŠOVÁ, Aneta
In my bachelor thesis I focus on of water and its role in nutrition and health promotion. The thesis is divided into two parts, theoretical and practical. In the theoretical part, I focus on the characterization of water, properties of water, the occurrence of water in foods and its impact on human health. In the practical part is concerned with research using questionnaires designed to examine the issue of awareness of drinking regime for students from primary school. In the final phase I present the results obtained, which are evaluated and graphically presented.
|
|
|
Comparison of the Drinking Regime and Alcohol Consumption of High School Students
NOVOTNÁ, Jitka
My work deals with the problem of alcohol consumption of high school and apprentice students. The goal of my work was to find out what drinks youths prefer and how much of it they drink daily. The next goal was to find out the alcohol consumption of high school and apprentice students. In this research I evaluated how often youths drink alcohol, at what age they first drank it and what their opinion is about its effect on human health. In the theoretical part of this work I dealt with a better drinking regime, different kinds of beverages and I evaluated different alcoholic and non- alcoholic beverages according to their effects on human health. I have described different examples of diseases that are caused by overconsumption of alcohol and those that people with alcohol addiction suffer from. For extra interest I have described the origin of different beverages. In the research part I dealt with the drinking regime of high school and apprentice students. I found out what sweet and sugar free beverages students and apprentices drink and how much they drink daily. It also deals with differences in alcohol consumption between students and apprentices, if boys drink more alcohol than girls and if smokers drink more alcohol than non- smokers. To obtain the results I used questionnaires and gave them to students at high schools and apprentices at vocational schools in České Budějovice. The results were processed in MS Excel. The research confirmed all expected hypothesis. The first confirmed hypothesis was that apprentices drink alcohol more often than high school students. The next confirmed hypothesis was that the above mentioned group does not follow a correct drinking regime. The third confirmed hypothesis was that boys drink alcohol more often than girls. The hypothesis that expected that students and apprentices who smoke drink alcohol more often was also confirmed. The last confirmed hypothesis was, that youths prefers beverages with a content of sugar more than water and sugar free tea.
|
|
|
Regime of drinking by nurses
KREMSOVÁ, Alžběta
In my Bachelor Thesis, I dealt with the questions of observing the drinking regime in nurses. The survey group consisted of nurses employed in wards of the Tábor and Pelhřimov hospitals. Observing the fluid intake is essential for the correct function of all processes in the organism. Drinking regime is one of the factors that influence the quality of nurses{\crq} work. It is therefore indispensable that nurses are sufficiently informed about the proper rules of fluid intake and that they observe them. Sufficient knowledge may also improve the care of the clients{\crq} fluid intake.
|
|
|
Nursing in children with diarrhoeal diseases
HEČKOVÁ, Šárka
This thesis deals with the problems of nursing in children with diarrhoeal diseases. Diarrhoea ranks the second most common disease in children and is often the reason for hospitalization because of its serious complications. Apart from the basis disease, admission to hospital represents a huge psychical stress for both a child and a family. Handling the situation depends also on the nursing personnel in a large extent. In the theoretical part you can find the division and specification of the most common causes, symptoms and basic treatment of diarrhoea. The theory is followed by the most common nursing problems developed during the nursing of children with diarrhoreal diseases. They include dehydration, pain, disrupted dermatic integrity, hyperthermia, loss of appetite, fear and anxiety. The possible causes of the occurence of nursing problems and their following solution are practically explained there. In the empirical part we dealt with the question if the presence of company leads to the hospitalization time shortening. For this purpose ten nursing records were noted. In five records the attention is paid to children hospitalized with the company of parents and further, five records of children hospitalized without the company of a close person are taken. After the analysis of the nursing records the following hypothesis resulted. Hypothesis 1: Permanent care to the limit of two nurses positively influences the adaptation of a child. Hypothesis 2: Presence of a company in a handicapped child leads to the hospitalization time shortening. Hypothesis 3: Nurses can influence the experience of children for their lifetime by their nursing. The nursing also includes the assesment and solution of nursing diagnoses. From the analysis of nursing documentation of hospitalized children (to the age of ten), the most common nursing diagnoses occuring in children with diarrhoeal diseases resulted. The presupposed hypothesis that the most often stated nursing diagnosis is the shotage of body fluids was proved. This result includes the fact that the need of fluids in babies and toddlers is considerably higher than in children and adults. Finally, it is possible to say that the results of the thesis advert to nursing problems which are solved during the care of children with diarrhoeal diseases. They can also help nurses realize the mistakes they make during the nursing of children with diarrhoeal diseases and improve the quality of nursing these children.
|
|
|
Drinking Schedule of South Bohemian University Students
POSPÍŠILOVÁ, Lucie
The topic {\clqq}Drinking Schedule`` is a question under debate. Although many people do not observe the drinking schedule. The thesis includes the summary of observations of the drinking schedule, health effects, dehydration beginning, body fluid physiology, water intake and output, nonalcoholic and alcoholic drink usability. The research part of the thesis surveys the state of a given problem of the drinking schedule by South Bohemia University students.
|
|
|
CHILDREN´S HABITS CONCERNING DRINKING REGIMEN AT BASIC SCHOOLS IN THE TOWN HAVLÍČKŮV BROD
TVRDÁ, Lenka
Water is necessary for life, it forms essential part of body and many important chemical reaction takes place in it. Water intake is influenced by hypothalamus what is expressed as a feeling of thirst. Fluids are intaken especially in form of drink, less from food and metabolic processes. The biggest water release is by kindness, less by skin, respiration and stool. Insufficient water threatens by dehydratation. Child{\crq}s body is vulnerable to dehydratation more then adult{\crq}s body. In developing countries 4 -5 millions of children per year die of dehydratation per year. Smaller lack of water is expressed as higher tiredness, inattention or headache. Mucous membrane dries up and has predisposition to penetration of infection and constipation or lack of appetite can appear. Chronic absence of water can be initiatory moment for formation of cholelithiasis and renal stones. Lack of water during school teaching can decline efficiency and capability of concentration. It is well known that drinking of extra sugar beverages leads to egestion of insulin with subsequent rapid decline of blood sugar. High capacity of sugar in lemonade leads to satiety as a consequence of children refusing food. There were used two methods for data collection - direct questioning (in the first and second classes in school) and questionnaire (from the third to ninth classes). Rate of return was 100 per cent. The aim of work is survey of informedness with real children behavior. These hypothesis were verified by research. Hypothesis 1: Children are well informed. Hypothesis 2: Children disobey these information. Hypothesis were confirmed in major part of stand point. I thing that my research brought up new pieces of knowledge concerning drinking regimen at basic schools. Results can be used as basement to next research in this area and extend information concerning this problem or for preparation of prime prevention programs at basic schools.
|
guest ::
