|
|
Fractionation of humic acids isolated from lignite
Moťka, Pavel ; Barančíková, Gabriela (referee) ; Klučáková, Martina (advisor)
The diploma thesis deals with lignitic humic acids. Bibliographic search can be divided into three parts. The aim of the first part is characterization of humic substances, presence, composition, structure and exploitation especially of humic acids. The second part describes a division of heterogeneous mixture of humic acids into closed fractions with more specific properties. The final part is a study of solubility of humic acids. The experimental part of the diploma thesis is structured similarly. In this work, a gradual fractionation with pH is used. Obtained fractions were characterized by UV/VIS and FT-IR spectroscopy. We assessed the portion of ash and carboxyl groups have been identified. Subsequently, all fractions extracted by gradual fractionation as well as some soluble fractions obtained by direct fractionation have been analyzed in view of solubility and their behaviour in water environment. Both used methods were compared.
|
|
|
Model of Sport Services in E-commerce
Moťka, Pavel ; Marvan, Jiří (referee) ; Dvořák, Jiří (advisor)
This diploma thesis deals with tools of electronic commerce. Author focuses on definition of electronic commerce, basic relation’s analysis, current trends, as well as the future perspective of e-commerce in its initial part. Information gained in that part is used to analyze a trading company operating in the field of sport service. Second part includes implementation proposal of new elements such as E-learning and E-shop into the company’s information system. These elements are supposed to increase competitive ability, to support marketing effort and to help to promote line of business.
|
|
| |
|
| |
|
|
Model of Sport Services in E-commerce
Moťka, Pavel ; Marvan, Jiří (referee) ; Dvořák, Jiří (advisor)
This diploma thesis deals with tools of electronic commerce. Author focuses on definition of electronic commerce, basic relation’s analysis, current trends, as well as the future perspective of e-commerce in its initial part. Information gained in that part is used to analyze a trading company operating in the field of sport service. Second part includes implementation proposal of new elements such as E-learning and E-shop into the company’s information system. These elements are supposed to increase competitive ability, to support marketing effort and to help to promote line of business.
|
|
|
Fractionation of humic acids isolated from lignite
Moťka, Pavel ; Barančíková, Gabriela (referee) ; Klučáková, Martina (advisor)
The diploma thesis deals with lignitic humic acids. Bibliographic search can be divided into three parts. The aim of the first part is characterization of humic substances, presence, composition, structure and exploitation especially of humic acids. The second part describes a division of heterogeneous mixture of humic acids into closed fractions with more specific properties. The final part is a study of solubility of humic acids. The experimental part of the diploma thesis is structured similarly. In this work, a gradual fractionation with pH is used. Obtained fractions were characterized by UV/VIS and FT-IR spectroscopy. We assessed the portion of ash and carboxyl groups have been identified. Subsequently, all fractions extracted by gradual fractionation as well as some soluble fractions obtained by direct fractionation have been analyzed in view of solubility and their behaviour in water environment. Both used methods were compared.
|
guest ::
