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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Breeding techniques and narcotic studies with hemp Cannabis sativa L

Buchholtz, Kenneth Paul, January 1943 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1943. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 68-71).
2

Sebemedikace konopím u osob trpících roztroušenou sklerózou / Self-medication with cannabis by people who suffer from multiple sclerosis

Štosková, Jana January 2015 (has links)
SITUATION: Multiple sclerosis belongs to the most common chronic neurological disease of the central nervous system. The disease is incurable, however it is treatable. Modern medicine has a variety of medications to relieve the symptoms and slowing the onset and progression. In many cases, however, treatment is not effective and often causes side effects. Cannabis and its products are used in the symptomatic and causal therapy of many diseases. The efficacy of cannabis treatment in multiple sclerosis is confirmed by several studies. Medical cannabis is a way how to relieve pain and muscle spasms. In 2013 in the Czech Republic there have been changes in laws allowing prescribing cannabis for medical treatment. OBJECTIVES: The study's goal is to describe the issues of self-medication using medical cannabis from the perspective of people suffering from multiple sclerosis. The primary objective is to map the following areas: introduction to cannabis and motivation to self- medication, frequency and methods of self-medication, therapeutic effects experienced during self-medication, side effects experienced during self-medication, perspectives of cannabis use in the future. METHODOLOGY: Self-selection in combination with snowball sampling method was used to obtain survey respondents. Data in this study...
3

Obsah kanabidiolu v konopí setém (Cannabis sativa) / Cannabidiol level in hemp (\kur{Cannabis sativa})

BOUDOVÁ, Miroslava January 2013 (has links)
Hemp (Cannabis sativa) is a crop that people have grown for a lot of years ago. It is amazing by its almost versatile use, whether in medicine, food, industry and power engineering. The aim of this thesis was to evaluate the content of cannabidiol in different parts of hemp and the possibility of using these parts as a source of the compound. Morphologically distinct varieties - Bialobrzeskie and Finola were selected for the experiment. The Cannabidiol content was determined by high performance liquid chromatography (HPLC). Hemp roots, stems, male and female inflorescences and leaves were sampled for the determination of cannabidiol level. The highest content of cannabidiol was found in hemp flowers and leaves of Cannabis sativa. Therefore, theoretically, these parts of hemp grown for fiber could be used as a potential source of cannabidiol.
4

Ekstrakcija industrijske konoplje (Cannabis sativa L.) / Extraction of industrial hemp (Cannabis sativa L.)

Drinić Zorica 16 October 2020 (has links)
<p>U okviru ovog rada izvr&scaron;eno je ispitivanje različitih procesa ekstrakcije herbe industrijske konoplje. Za ekstrakciju određenih bioaktivnih jedinjenja primenjene su klasične tehnike ekstrakcije, maceracija i Soxhlet ekstrakcija, dok su od savremenih metoda primenjene ultrazvučna ekstrakcija, mikrotalasna ekstrakcija, ekstrakcija vodom u subkritičnom stanju i ekstrakcija ugljendioksidom u superkritičnom stanju. Praćenjem uticaja ulaznih promenjivih (procesnih parametara) na odabrane izlazne promenjive (sadržaj bioaktivnih jedinjenja ili antioksidativnu aktivnost) za svaku tehniku ekstrakcije pojedinačno utvrđeni su optimalni uslovi ekstrakcije. Nakon izvr&scaron;enog poređenja odabrana je najadekvatnija tehnika ekstrakcije za pripremu tečnog ekstrakta koji će biti transformisan u suvi ekstrakt primenom metode su&scaron;enja raspr&scaron;ivanjem. Prilikom dobijanja suvog ekstrakta ispitan je uticaj različite koncentracije nosača na kvalitet ekstrakata i efikasnost su&scaron;enja. Dobijeni ekstrakti su okarakterisani u pogledu fizičkih i hemijskih osobina. Sadržaj kanabinoida u tečnim ekstraktima suve herbe industrijske konoplje ispitanih u ovoj doktorskoj disertaciji je bio u opsegu od 0,4314 mg/mL CBD-a i 0,0364 mg/mL THC-a (u optimalnom ekstraktu dobijenom maceracijom) do 1,0420 mg/mL CBD-a i 0,0430 mg/mL THC-a (u optimalnom ekstraktu dobijenom mikrotalasnom ekstrakcijom). U ekstraktima koji su nepolarnog karaktera i koji su dobijeni primenom Soxhlet ekstrakcije sadržaj CBD-a i THC-a je bio 64,40 i 2,90 mg/g, dok je primenom superkritične ekstrakcije dobijen sadržaj CBD-a i THC-a u opsegu od 76,1193 do 163,1111 mg/g i od 4,1746 do 6,5803 mg/g. Tečni ekstrakti dobijeni primenom vode i etanola kao ekstragensa bili su bogati flavonoidima i fenolima, a utvrđeno je i da imaju značajnu antioksidativnu aktivnost, dok su ekstrakti dobijeni Soxhlet ekstrakcijom i ekstrakcijom ugljendioksidom u superkritičnom stanju bili bogati lipofilnim jedinjenjima i terpenima. Ovako dobijeni ekstrakti predstavljaju visokovredne proizvode koji imaju veliki potencijal za upotrebu u farmaceutskoj industriji.</p> / <p>Various extraction processes of the aerial parts of industrial hemp were examined. From classic extractions, maceration and Soxhlet extraction were applied, while from novel methods, ultrasound-assisted extraction, microwave-assisted extraction, subcritical water extraction and supercritical carbon dioxide extraction were applied. By monitoring the influence of the input variables on the selected output variables for each extraction, the optimal extraction conditions were determined separately. After a comparison of all the extraction processes tested, microwave-assisted extraction was selected to prepare the liquid extract for spray drying. The effect of different carrier concentrations was examined during the preparation of the dry extract. The extracts obtained were characterized in terms of physical and chemical properties. The content of cannabinoids in liquid extracts of dry Cannabis sativa herba examined ranged from 0.4314 mg/mL for CBD and 0.0364 mg/mL for THC in the optimum extract obtained by maceration to 1.0420 mg/mL for CBD and 0.0430 mg/mL for THC in the optimum extract obtained by microwave-assisted extraction. The CBD and THC content in extract obtained by Soxhlet extraction was 64.4000 mg/mL and 2.9000 mg/mL, respectively, while the highest content of CBD and THC in the supercritical carbon dioxide extract was 163.11 and 6.5803 mg/g. In addition to cannabinoids, the liquid extracts obtained were rich in phenols and flavonoids, and have considerable antioxidant activity, while the extracts obtained by Soxhlet extraction and supercritical carbon dioxide were rich in lipophilic compounds and terpenes. The extracts mentioned above are high value products which have great potential for implementation in the pharmaceutical industry.</p>
5

FIBRA DI CANAPA PER APPLICAZIONI DI ALTA QUALITA' / HEMP FIBRE FOR HIGH-QUALITY APPLICATIONS / HEMP FIBRE FOR HIGH-QUALITY APPLICATIONS

MUSIO, SALVATORE 27 March 2018 (has links)
La fibra di canapa europea è l'unica fibra naturale con una certificazione di sostenibilità. La qualità della fibra è influenzata principalmente da genotipo, tecniche agronomiche, epoca di raccolta e metodo di macerazione. L'obiettivo principale della tesi è delineare le pratiche agronomiche e di post-raccolta per migliorare l'estrazione e la qualità della fibra, con particolare attenzione alla produzione di canapa multiuso ritardando la raccolta fino alla maturazione dei semi. Le prove di densità, fertilizzazione azotata e varietali sono state condotte in differenti ambienti Europei. La procedura di decorticazione standardizzata è stata confrontata con la linea longitudinale di estrazione della fibra per applicazioni di alto valore aggiunto. I test su bio-compositi di canapa sono stati effettuati con fibra pettinata per confrontarne le proprietà tra genotipi, epoca di raccolta e metodi di macerazione. I risultati di questa indagine suggeriscono che i) la densità di semina e la concimazione azotata ottimale sono tra 90-150 piante m-2 e 30-60 kg N ha-1; ii) le nuove varietà dallo stelo giallo presentano un'alta efficienza di decorticazione e una ridotta contaminazione da canapulo nella fibra, iii) la fibra di canapa, con proprietà comparabili a quelle del lino, si è dimostrata adatta per applicazioni in compositi di alto valore. / European hemp fibres are the only natural fibre with an established sustainability certification. Hemp fibre quality is affected by genotype, agronomic techniques, harvest time and retting method. The main objective of this thesis is to outline the agronomic and post-harvest practices for improved fibre extraction and fibre quality, with special attention to multipurpose hemp production delaying the harvest from the flowering stage until seed ripening is complete. Planting density and nitrogen fertilization trials and variety trials were conducted in contrasting environments in Europe. Stems were decorticated following a standardised procedure and longitudinal hemp line for textile and high-added values application was compared with lab-scaled decortication. Impregnated fibre bundle tests were carried out with hemp hackled fibre bundles to compare composites and back-calculated fibre properties between genotypes, harvest times and retting methods. Results of this investigation suggest that i) optimum plant density and nitrogen fertilization are between 90 and 150 plants m-2 and 30 and 60 Kg N ha-1 respectively; ii) new yellow stemmed varieties are characterized by high decortication efficiency and relative high cleanness of the extracted fibre and iii) long hemp fibre, having properties comparable to those of flax, proved to be suitable for high-tech composites applications.

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