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Impact of plant alkaloids on viral infection
Šnejdarová, Aneta ; Horníková, Lenka (advisor) ; Váňová, Jana (referee)
Plant products have been used to treat various diseases since ancient times thanks to the many active substances they contain. One such group of substances are alkaloids. Alkaloids are biologically active substances which, in addition to antimicrobial, anti-inflammatory, antioxidant and many other properties, also possess antiviral properties. As a result, they can help treat viral infections, which are still a major medical problem today. Alkaloids affect all steps of virus replication, both viral components but especially cellular processes, without which a successful progress of viral cycle is not possible. In connection with the treatment of viral infections, the tropane, troponol, purine and isoquinoline alkaloids have been best investigated, which are also the subject of this work. The tropane alkaloid atropine acts mainly on enveloped viruses due to its ability to change the properties of biological membranes. Purine alkaloid caffeine, thanks to its ability to inhibit the cellular enzyme phosphodiestrase, causes an increase in intracellular cAMP levels and it has an impact on viral replication. Its antioxidant and immunomodulatory properties are also beneficial for the treatment. The anti-inflammatory effects of the tropane alkaloid colchicine stem from its ability to inhibit the dynamics of...
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The contribution of agriculture to the ghanaian economy
Ayeh, Elizabeth
The general purpose of this study is to determine the contribution of agriculture to the economy of Ghana. The country’s economy is characterised by the presence of high level of agriculture. Agriculture is the main economic activity for most people in Ghana. The study reveals that agriculture contributes about 18% to GDP, 40.65% of total employment, and about 34% of total exports of agricultural valued added goods and source of industrial inputs (raw materials) in the country. Nevertheless, agriculture in the country has faced the following challenges: low fertiliser uses and yield, pests and diseases, inadequate modern farm inputs and technologies, lack of financial support systems, rural-urban migration, agricultural extension services, land tenure system, poor road network, and low prices for agricultural products. The government should encourage more exportation of agricultural output this would concurrently, augment the country’s foreign exchange record in a positive direction and bolster the competitive qualities of the country’s products on the international front. Also, agricultural universities, if none exist, must be created and equipped with financial and technological capacities to carry out serious research and investigation into all facets of the agricultural economy; including; forestry, aquaculture, apiculture, diseases and pest, and crop production, not excluding post-harvest and marketing researches.
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Where food comes from? Tutorial program for second grade of primary school - workbook (plant products)
VALKOVÁ, Michaela
Diploma thesis is focused on finding information for second grade of primary school of problems plant products and post-processing tutorial workbook (plant products) called Where food comes from? In the theoretical part first describe the theory workbook, its structure, evaluation and characterization of the concept of education at the second grade of primary school. Consequently, the theoretical part of the work devoted to essential individual plant products such as cereals, legumes, vegetace oils and fats, potatoes, drinking, fruits and vegetables, thein origins and significance for human health. The practical part includes the development and implementation of the educational program (workbook) plant products. In the practical part I find information students of second grade from primary schools in the field of plant products with the help of a questionnaire survey, which was attended by 90 respondents and subsequent evaluation of the graphical part.
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