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Dissertations / Theses on the topic 'Hemp'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Kärkkäinen, Ela, Åsa Älgbrant, and Simon Kronberg. "Fibres from agricultural hemp waste." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-26573.

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There is an increasing demand for natural fibres in the textile industry as a consequence of the negative impact of the industry on the environment. Svensk Hampaindustri (SHI) is currently growing hemp in Sweden for its seeds. This leaves residue in the form of hemp stems that could be processed for textile products. Today this residue material is not used for anything, however there is a desire that it could be used for added value. This study investigates the possibility of extracting fibres from the hemp residue mechanically and using them in applications. Hemp, a variety of Cannabis sativa

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2

Islam, Mohammad Saiful. "The Influence of Fibre Processing and Treatments on Hemp Fibre/Epoxy and Hemp Fibre/PLA Composites." The University of Waikato, 2008. http://hdl.handle.net/10289/2627.

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In recent years, due to growing environmental awareness, considerable attention has been given to the development and production of natural fibre reinforced polymer (both thermoset and thermoplastic) composites. The main objective of this study was to reinforce epoxy and polylactic acid (PLA) with hemp fibre to produce improved composites by optimising the fibre treatment methods, composite processing methods, and fibre/matrix interfacial bonding. An investigation was conducted to obtain a suitable fibre alkali treatment method to: (i) remove non-cellulosic fibre components such as lignin (sen

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3

Korte, Sandra. "Processing-Property Relationships of Hemp Fibre." Thesis, University of Canterbury. Mechanical Engineering, 2006. http://hdl.handle.net/10092/1175.

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There is great interest in the plant Cannabis sativa (hemp) as a source of technical fibres for the reinforcement of polymers in composite materials due to its high mechanical properties. As a natural fibre hemp also offers biodegradabilty and is therefore an inexpensive and renewable alternative to glass fibres However, the environmental benefits of natural fibres cannot be fully exploited if the manufacturing of their composites involves polluting processing steps. Unfortunately, there is still a lack of environmetally sustainable processing methods yielding technical fibres of suffic

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4

Patel, Harish. "Hemp fibre reinforced sheet moulding compounds." Thesis, Queen Mary, University of London, 2012. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8783.

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Glass fibres are by far the most extensively used fibre reinforcement in thermosetting composites because of their excellent cost-performance ratio. However, glass fibres have some disadvantages such as non- renewability and problems with ultimate disposal at the end of a materials lifetime since they cannot be completely thermally incinerated. The possibility of replacing E-glass fibres with hemp fibres as reinforcement in sheet moulding compounds (SMC) is examined in this thesis. The composites are manufactured with existing SMC processing techniques and similar resin formulation as used in

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5

Dasong, Dai. "Hemp nanocellulose : fabrication, characterisation and application." Thesis, Brunel University, 2015. http://bura.brunel.ac.uk/handle/2438/11311.

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Nanocellulose has gained lots of attentions in recent years due to the development of nanotechnology. Thousands of publications have been reported about the fabrication, characterization and application of nanocellulose, among which most of the nanocelluloses were fabricated from the microcrystalline cellulose (MCC) or pulp, and only two methods about the nanocellulose fabrication have been reported, i.e. sulphuric acid hydrolysis and mechanical treatment. The sulphuric acid method can only obtain low yield of nanocellulose and the mechanical treatment can not fabricate nanocellulose with high

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6

Britt, Kadie Elizabeth. "Insect pest management in hemp in Virginia." Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/103014.

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For the first time in many decades, a hemp pilot program was initiated in Virginia in 2016. Outdoor surveys were conducted in the 2017 and 2018 field seasons to record insect presence and feeding injury to plants. Multiple insect pests were present, including corn earworm (Helicoverpa zea [Boddie]) (Lepidoptera: Noctuidae), brown marmorated stink bug (Halyomorpha halys [Stål]) (Hemiptera: Pentatomidae), and cannabis aphid (Phorodon cannabis) (Hemiptera: Aphididae). In 2019, indoor production surveys revealed that cannabis aphid, twospotted spider mite (Tetranychus urticae Koch) (Acari: Tetrany

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7

Beckermann, Gareth. "Performance of Hemp-Fibre Reinforced Polypropylene Composite Materials." The University of Waikato, 2007. http://hdl.handle.net/10289/2543.

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Increasing worldwide environmental awareness is encouraging scientific research into the development of cheaper, more environmentally friendly and more sustainable construction and packaging materials. Natural fibre reinforced thermoplastic composites are strong, stiff, lightweight and recyclable, and have the potential to meet this need. Industrial hemp fibre is amongst the strongest of the natural fibres available, and possesses a similar specific stiffness to E-glass, but with additional benefits such as low cost and low production energy requirements. The favourable mechanical properties

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8

Gross, Christopher D. "Structural enhancement of timber framing using hemp-lime." Thesis, University of Bath, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.571876.

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The world is facing increasing pressures to reduce the amount of energy and resources that are being used. The UK government has targets to reduce carbon emissions and energy usage. Within the UK buildings are a significant contributor towards both energy and material usage. One approach to reduce the energy and carbon emissions from construction is to use natural materials that require minimal processing and energy input such as straw, timber, unfired earth and hemp-lime. Hemp-lime is a composite solid wall insulating material made from hemp shiv and a lime based binder and water which can be

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9

Wretfors, Christer. "Hemp fibre and reinforcements of wheat gluten plastics /." Alnarp : Dept. of Agriculture - Farming Systems, Technology and Product Quality, Swedish University of Agricultural Sciences, 2008. http://epsilon.slu.se/11236319.pdf.

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10

Mills, Brantley. "On the use of dynamically similar experiments to evaluate the thermal performance of helium-cooled tungsten divertors." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52292.

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Many technological hurdles remain before a viable commercial magnetic fusion energy reactor can be constructed, including the development of plasma-facing components with long lifetimes that can survive the harsh environment inside a reactor. One such component, the divertor, which maintains the purity of the plasma by removing fusion byproducts from the reactor, must be able to accommodate very large incident heat fluxes of at least 10 MW/m^2 during normal operation. Modular helium-cooled tungsten divertors are one of the leading divertor designs for future commercial fusion reactors, and a n

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11

Anthireddy, Prasanna Kumar. "Development of a Natural Fiber Mat Plywood Composite." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc1011815/.

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Natural fibers like kenaf, hemp, flax and sisal fiber are becoming alternatives to conventional petroleum fibers for many applications. One such applications is the use of Non-woven bio-fiber mats in the automobile and construction industries. Non-woven hemp fiber mats were used to manufacture plywood in order to optimize the plywood structure. Hemp fiber mats possess strong mechanical properties that comparable to synthetic fibers which include tensile strength and tensile modulus. This study focuses on the use of hemp fiber mat as a core layer in plywood sandwich composite. The optimization

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12

Khoathane, MC, OC Vorster, and ER Sadiku. "Hemp Fiber-Reinforced 1-Pentene/Polypropylene Copolymer: The Effect of Fiber Loading on the Mechanical and Thermal Characteristics of the Composites." SAGE, 2008. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000586.

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One of the recent developments in composite technology in South Africa is the increasing use of natural fiber materials in the manufacture of plastic products. Most of the previous work on natural fiber-reinforced composites has focused on sisal fiber as it was commercially available. In this study, the mechanical and thermal properties of composites made with locally produced hemp fibers, were compared with composites made with hemp fibers produced in France. New commercial polypropylene random copolymer was used as matrix because it can be processed at lower temperatures when compared with o

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13

Ali, Arshad. "Surface modification of hemp fiber to improve spinning properties." AATCC, 2013. http://hdl.handle.net/1993/22053.

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Finer count hemp yarn (<20-50 tex) for apparel and smart textiles applications with a minimum number of imperfections cannot be manufactured using the cotton spinning system due to the presence of non-cellulosic materials in the fiber structure. An investigation has been carried out to identify the spinning properties of hemp fibers including strength, length and length variation, single fiber entity, fineness, bending modulus and softness by removing non-cellulosic materials from hemp. Different chemical and enzyme treatments were employed to improve the selected spinning properties of hemp f

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14

Sam-Brew, Solace Araba. "The use of flax and hemp resource for particleboard." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/60617.

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The focus of this study was to investigate flax shive and hemp hurd as alternate residue for particleboard production, investigate the lowest percentage of the pricier polymeric diphenyl methane diisocyanate (pMDI) resin that can be used to effectively bond the residues and evaluate an acrylic-based resin for particleboard manufacture. The flax shive and hemp hurd had lower bulk densities and higher aspect ratios compared with wood. Their higher aspect ratios offered greater overlap in bonding leading to consistently higher bending properties that exceeded American National Standards Institut

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15

Hirst, Edward A. J. "Characterisation of hemp-line as a composite building material." Thesis, University of Bath, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636516.

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Hemp-lime is a comparatively novel renewable insulation material in the construction industry. Its use was first documented in the 1980’s, however, recent increased interest and the release of popular publications has resulted in an increased need for scientific investigation into the material. The research conducted in this investigation firstly focussed on furthering the empirical characterisation of hemp-lime and its constituents with particular attention paid to minimising fabrication variables and increasing the accuracy of final specimen bulk densities. Secondly attempts were made to qua

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16

Quajai, Sirisart, and soj@kmitnb ac th. "Biopolymer Composite based on Natural and Derived Hemp Cellulose Fibres." RMIT University. Applied Sciences, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20061222.111612.

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The aim of this research was to study the effect of pre-treatment and modification processes on the properties of hemp cellulose fibre for biopolymer composites application. Hemp fibres have been modified by various extraction, swelling, chemical and enzymatic treatments. The morphology and mechanical properties of the modified fibres have been measured. Biopolymer composites have been prepared using the modified fibres and matrices of cellulose acetate butyrate and cellulose solutions derived from hemp. The first fibre treatment employed was acetone extraction and mercerization. A low press

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17

Sadek, Mohammad. "Modeling biofibre (hemp) processing using the discrete element method (DEM)." Food & Process Engineering Institute Division of ASABE, 2011. http://hdl.handle.net/1993/18484.

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The main objective of the research was to understand hemp processing at different stages through numerical simulations. Processing of hemp materials involves breaking the hemp into different sizes of particles and separating those particles into fractions of different sizes. Numerical models were developed using the discrete element method (DEM) to simulate hemp processing using a hammermill and separations of different hemp particles using a 3D vibratory screen-type separator. The models were implemented using a commercial DE code, the Particle Flow Code in Three Dimension (PFC3D). In the mod

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18

Behr, Marc. "Molecular investigation of cell wall formation in hemp stem tissues." Doctoral thesis, Université catholique de Louvain, Louvain-la-Neuve, 2018. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/297325.

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The interest around hemp is currently renewed for the production of bio-based and renewable materials in the context of global warming. This fibre crop is able to produce large amounts of fibres with different features and industrial application. The most valuable fibres, found in the phloem tissue, are rich in cellulose while relatively poor in lignin, by contrast with the xylem tissue. This thesis aims at studying the events related to the biogenesis of these two types of fibre. Using two different systems, we will investigate the molecular mechanisms related toelongation, secondary growth,

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19

Hughes, John Mark. "On the mechanical properties of bast fibre reinforced thermosetting polymer matrix composites." Thesis, Bangor University, 2000. https://research.bangor.ac.uk/portal/en/theses/on-the-mechanical-properties-of-bast-fibre-reinforced-thermosetting-polymer-matrix-composites(0fdca4e4-8d50-4a16-afd0-37d78cfb8a64).html.

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Bast fibre reinforced, unsaturated polyester matrix composites were fabricated using non-woven mats of hemp or jute fibre as reinforcement. Composites were also prepared using chopped strand mat glass fibre as reinforcement. The short-term mechanical properties of the laminates were assessed. It was observed that at equivalent fibre volume fractions the stiffness of the glass fibre reinforced material only marginally exceeded that of the two, unmodified bast fibre, reinforced materials. At equivalent fibre volume fractions, however, the strength of the glass fibre reinforced composite was foun

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20

Anderson, Robert David. "Effects of Nitrogen Fertilizer Rate, Timing, and Herbicide Use on Industrial Hemp (Cannabis Sativa)." TopSCHOLAR®, 2018. https://digitalcommons.wku.edu/theses/2100.

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Industrial hemp (Cannabis sativa) is an old crop being reintroduced into certain states; thus, very little information is known about growing the crop domestically. Two field experiments were established in Bowling Green, KY to evaluate various nitrogen fertilizer rates and timing applications to examine the effects on growth and yield of industrial hemp (Cannabis sativa). Each experiment was sprayed with 1.12 a.i. ha-1 pendimethalin on half of each plot as a pre – emergent herbicide. Hemp was planted at a rate of 43 kg/ ha into a conventionally tilled silt loam soil. Nitrogen rates studied we

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21

Byrd, Jabari Akil. "Industrial Hemp (Cannabis sativa L.) Germination Temperatures and Herbicide Tolerance Screening." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/91431.

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Industrial hemp (Cannabis sativa L.) has a long history of human use. Early in the 20th century, some predicted hemp would be the first billion dollar crop given its multiple industrial applications. Government policy that restricted, then prohibited, hemp's use in the U.S. prevented that from happening. A reawakening to the versatility and usefulness of hemp for products ranging from engineering fibers and textiles to food and health products has developed over the last 30 years. Hemp-based products are thriving on the market for public demand. In Virginia, passage of legislation in 2017 made

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22

Latif, Eshrar. "Hygrothermal performance of hemp based thermal insulation materials in the UK." Thesis, University of East London, 2013. http://roar.uel.ac.uk/3454/.

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This thesis explores the hygrothermal performance of hemp insulation in the context of the United Kingdom. The key objectives of this investigation were to assess the heat and moisture management capacities of hemp insulations in two constructions typical to the UK, of timber frame and solid brick walls and to put the findings of the assessment into the greater context of conventional insulation materials by comparing hemp insulation’s performance with that of stone wool. The assessments were performed by means of laboratory-based experiments, in situ experimental monitoring and computer based

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23

Truedsson, Herman, and Henrik Jacobsson. "Prefabricerade väggelement av hampabetong." Thesis, Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-24395.

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Lime Hempcrete consists of lime, water and hemp and creates an insulating, sound-absorbing, lightweight and environmentally friendly material that can be used in wall, roof and floor structures (Bevan & Woolley 2008). This construction method is not yet developed in Sweden as there has been a ban on the cultivation of the hemp plant. This ban on the cultivation of hemp was removed in 2003, when the material got a boost. You can use it in many different ways and not just in the construction industry (Ahlsten, 2010). In this study we have investigated the possibility to produce prefabricated

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24

McLaggan, Martyn Scott. "Novel fire testing frameworks for Phase Change Materials and hemp-lime insulation." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/15896.

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Modern buildings increasingly include the usage of innovative materials aimed at improving sustainability and reducing the carbon footprint of the built environment. Phase Change Materials (PCMs) are one such group of novel materials which reduce building energy consumption. These materials are typically flammable and contained within wall linings yet there has been no detailed assessment of their fire performance. Current standard fire test methods provide means to compare similar materials but do not deliver knowledge on how they would behave in the event of a real fire. Thus, the aim of thi

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25

Francis, Sara K. "Hemp, Cannabis sativa L., as an alternative fibre source for Nova Scotia." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq24965.pdf.

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26

Correia, Fatima M. C. "Fibre characteristics and chemical pulping of Canadian industrial hemp (Cannabis sativa L.)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ45604.pdf.

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27

Malomo, Sunday. "Structure-function properties of hemp seed proteins and protein-derived acetylcholinesterase-inhibitory peptides." Elsevier, 2014. http://hdl.handle.net/1993/30736.

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Hemp seed proteins (HSP) were investigated for physicochemical and functional properties in model food systems. In addition, the HSP were enzymatically digested and the released peptides investigated as potential therapeutic agents. Membrane isolated HSP (mHPC) were the most soluble with >60% solubility at pH 3-9 when compared to a maximum of 27% for isoelectric pH-precipitated proteins (iHPI). However, iHPI formed emulsions with smaller oil droplet sizes (<1 µm) while mHPI formed bigger oil droplets. The iHPI was subjected to enzymatic hydrolysis using different concentrations (1-4%) of six p

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28

Kohútová, Darina. "Komplexní zpracování technického konopí a využití izolovaných frakcí." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-449746.

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Hemp is a plant containing many active substances and it is widely used in industry. The most common applications are the food, pharmaceutical, textile and cosmetics industries. This diploma thesis dealt with the characterization of hemp fractions, which are created during hemp processing and their potential applications. The theoretical part was focused on the description of the plant, its chemical composition and the research of the active substances in hemp. Also, its industrial use, the technique of hemp processing and the current applications of individual fractions were summarized. In th

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29

Ehresmann, Michael John. "A Study on the Processing Characteristics and Reinforcing Potential of Natural Fiber Mats." Thesis, North Dakota State University, 2012. https://hdl.handle.net/10365/26638.

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Limited information exists regarding the processing parameters and extent of reinforcing potential natural fibers have in polymer matrices. The five natural fiber mats studied were low shive flax, mid shive flax, high shive flax, hemp and kenaf. The parameters characterized were fiber size, wax content, surface contact angle, and shive content. The compressive force and unsaturated permeability was measured for each mat, and composites were constructed and tested using selected mats in a soy-based polyurethane (PU) matrix. All mats exhibited a viscoelastic behavior under compression, and an in

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Maxwell, Brett A. "Effects of Herbicides on Industrial Hemp (Cannabis Sativa) Phytotoxicity, Biomass, and Seed Yield." TopSCHOLAR®, 2016. http://digitalcommons.wku.edu/theses/1742.

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Field studies were established in 2015 at Bowling Green and Lexington, KY to evaluate industrial hemp (Cannabis sativa) tolerance to various herbicides. Hemp was planted into conventionally tilled soils in mid to late June at a seeding rate of 39 kg/ha in Bowling Green and 22 kg/ha in Lexington. Five herbicide active ingredients were applied preemergence (PRE) the day of planting and six postemergence (POST) treatments were applied to 30 cm hemp with a CO2-backpack sprayer delivering 140 L/ha. Plots were 3.1 m wide by 6.1 m long and were sprayed with a 2.1 m boom sprayer leaving a 0.46 m visua

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31

Han, Hongchang. "Study of agro-composite hemp/polypropylene : treatment of fibers, morphological and mechanical characterization." Thesis, Troyes, 2015. http://www.theses.fr/2015TROY0002/document.

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L’utilisation des fibres végétales dans les polymères composites suscite de nombreuses investigations. Avant de mélanger les fibres végétales dans le polymère, un traitement chimique peut être effectué permettant de réduire l’hydrophilicité des fibres et d’améliorer l'adhérence à l’interface fibre/matrice. Dans cette thèse, l'eau et l'alcali sont utilisés d'abord pour traiter les fibres de chanvre, puis trois agents silane : 3-(triméthoxysilyl)propyl méthacrylate (MPS), N-[3- (triméthoxysilyl)propyl] aniline (PAPS) et (3-Aminopropyl)-triéthoxysilane (APS), sont utilisés pour modifier plus ou m

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Case, Olivia Hildegard. "An assessment of medicinal hemp plant extracts as natural antibiotic and immune modulation phytotherapies." Thesis, University of the Western Cape, 2005. http://etd.uwc.ac.za/index.php?module=etd&amp.

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This study aimed to evaluate the antimicrobial efficacy of medicinal hemp plant extracts to determine the antibacterial effects of indigenous Sansevieria species and exotic Cannabis sativa phytotherapy varieties. This study also assessed whether aqueous o

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33

Blouw, Langa Sunshine. "Effect of cultivar on the quality of flax and hemp grown in South Africa." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1010997.

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Bast fibrous renewable materials, as commercial crops for the manufacture of textile based and other products, have been used for thousands of years to satisfy certain human needs, such as for shelter, clothing, source of energy and tools, and to sustain the livelihood of many communities in countries, such as in Asia, Europe and Africa. Concern for the environment has led to a number of global initiatives that favour the use of natural fibres. It is forecast that the global fibre demand by 2050 will be 130 million tonnes, which the cotton and synthetic fibre production will not be able to mee

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Gadoury, Hélène. "Evaluation of Septoria galeopsidis Westd. as a bioherbicide for hemp-nettle (Galeopsis tetrahit L.)." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61896.

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Vermeulen, John Franciscus. "From the grave to the cradle :exploration of hemp as an eco-design material." Thesis, Cape Peninsula University of Technology, 2008. http://hdl.handle.net/20.500.11838/1316.

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Thesis (MTech (Design))--Cape Peninsula University of Technology, 2008<br>This thesis argues that the story of hemp is one of mistaken identity and focuses on the potential of hemp (Cannabis sativa L.) in a social and economic context. It also asserts how hemp with the application of appropriate technologies can be developed nationally 'new' material, with reference to examples from abroad. The current proliferation of raw material shortages means that designers have a social responsibility to seek new ways to source and process materials for a sustainable future. Designers are the "

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Zhang, Xiaohui. "Manufacturing of hemp/PP composites and study of its residual stress and aging behavior." Thesis, Troyes, 2016. http://www.theses.fr/2016TROY0015/document.

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Depuis quelques années les matériaux composites à base de fibres naturelles sont de plus en plus utilisés pour les nouvelles performances qu’ils proposent. C’est surtout au niveau des fibres naturelles que de nouvelles propriétés sont proposées. Dans ce travail, nous nous sommes essentiellement intéressés aux fibres naturelles de chanvre. Ces fibres sont déjà fortement utilisées dans l’automobile et la construction. En Europe, ces fibres sont produites principalement en France et plus particulièrement dans l’Aube. Pour développer des agro-composites hautes performances, c’est sous la forme de

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De, Prato Luca. "Genotype by environment interactions of industrial hemp (Cannabis sativa L.) varieties under tropical conditions." Thesis, De Prato, Luca (2021) Genotype by environment interactions of industrial hemp (Cannabis sativa L.) varieties under tropical conditions. PhD thesis, Murdoch University, 2021. https://researchrepository.murdoch.edu.au/id/eprint/61031/.

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Christmas Island, Australia, is a remote tropical island that relies predominantly on phosphate mining income. Given that mining operations will decline during the next decade, there is an urgent need to explore alternative industries to maintain local employment. This need could be met through activities such as a transition from mining to the production of high-value crops established in post-mined quarries. However, agriculture post-mining presents a series of challenges to growing crops, such as the lack of appropriate nutrients and organic matter, and the potential for soil compaction and

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Tura, Matilde <1994&gt. "Instrumental and sensory analyses for the characterization of food, phytotherapeutic or pharmaceutical hemp products." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amsdottorato.unibo.it/10097/1/Thesis%20Matilde%20Tura.pdf.

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To address the request to develop rapid and easy methods for determining the cannabinoids, an HPLC-UV method (8 min) to separate and quantify the 10 main cannabinoids in hemp inflorescences was developed, and in-house validated. Moreover, the antioxidant activity of cannabidiol (CBD) in two oily matrices was investigated and compared to that of α-tocopherol, in relation to the growing market of oily solutions containing cannabidiol. Then, since no univocal legislation on the evaluation of quality and authenticity of hemp seed oil (HSO) exists, the composition and quality of cold-pressed HSOs

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Fourmentin, Marine. "Impact de la répartition et des transferts d'eau sur les propriétés des matériaux de construction à base de chaux formulées." Thesis, Paris Est, 2015. http://www.theses.fr/2015PEST1100/document.

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Le béton de chanvre est obtenu par le mélange d'un granulat végétal, constitué de bois de chanvre, et d'un liant. Il confère au mur de bonnes propriétés d'isolation thermique et acoustique, ainsi qu'une régulation de l'humidité. Cependant, des problèmes de non-prise, qui semblent fortement liés aux transferts d'eau dans le béton au cours des premières heures, peuvent parfois se produire. La RMN permet de quantifier l'eau dans le chanvre et dans le liant et donc de décrire et comprendre les transferts au cours de la prise. Nous montrons d'abord que, dans le liant constitué d'un mélange de chaux

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Antony, Sheedev. "Multiscale Analysis to Investigate the Mechanical and Thermoforming Behaviour of Hemp Fibre Based Agro-composite." Electronic Thesis or Diss., Troyes, 2019. http://www.theses.fr/2019TROY0026.

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Ces dernières années, les fibres naturelles de chanvre affichent un grand potentiel d’application dans les secteurs de l’aérospatiale et de l’automobile en raison de leur recyclabilité, renouvelabilité et biodégradabilité. Associés à une matrice polymère, les tissés à base de fibres végétales permettent l’élaboration des pièces structurelles bio-sourcées de hautes performances mécaniques et thermiques avec une bonne aptitude à la mise en forme. Une maîtrise de la faisabilité de la chaîne d’éco-conception, caractérisation et fabrication est nécessaire pour une meilleure optimisation des ressour

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Patrick, Andrew P. "BLUEGRASS CAPITAL: AN ENVIRONMENTAL HISTORY OF CENTRAL KENTUCKY TO 1860." UKnowledge, 2017. http://uknowledge.uky.edu/history_etds/51.

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This dissertation traces the long-term evolution of the Inner Bluegrass region of central Kentucky with a focus on the period between the first Euro-American incursions into the area and the Civil War era. Utilizing an agroecological perspective that analyzes cultivated landscapes for their ecological features, it explores the ever-shifting mix of cultural and natural influences that shaped the local environment. Most prominently, it reveals the extent to which intertwined strands of capitalism and slavery mingled with biology to produce the celebrated Bluegrass agricultural system. It begins

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Girgih, Abraham T. "Structural and functional characterization of hemp seed (Cannabis sativa L.) protein-derived antioxidant and antihypertensive peptides." American Oil Chemists' Society, 2011. http://hdl.handle.net/1993/22085.

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ABSTRACT The aim of this work was to produce enzymatic hemp seed protein hydrolysates (HPH) followed by bioassay guided fractionation to identify antioxidant and antihypertensive peptides. Therefore, simulated gastrointestinal digestion of isolated hemp seed proteins was conducted using consecutive actions of pepsin and pancreatin to produce HPH, which was then separated by membrane ultrafiltration to obtain peptide sizes of <1, 1-3, 3-5, and 5-10 kDa. Evaluation of HPH and its membrane fractions for antioxidant and antihypertensive properties showed that they significantly (P<0.05) scavenge

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Réquilé, Samuel. "De la plante aux biocomposites : caractérisation des interfaces multiples et étude des paramètres pertinents Exploring the link between flexural behaviour of hemp and flax stems and fiber stiffness Peeling experiments for hemp retting characterization targeting biocomposites Deeper insight into the moisture-induced hygroscopic and mechanical properties of hemp-reinforced biocomposites. Interfacial properties of hemp fiber/epoxy: effect of moisture sorption and induced hygroscopic stresses Propriétés hygroscopiques et mécaniques d'un biocomposite renforcé par des fibres de chanvre." Thesis, Lorient, 2019. http://www.theses.fr/2019LORIS529.

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Les préoccupations environnementales de l'industrie et les stratégies visant à développer un système économique plus durable suscitent un intérêt croissant pour la recherche dans le domaine des biocomposites. Le fort caractère polaire et hydrophile des fibres végétales entraîne, lors de leur utilisation comme renfort, une complexité de mise en œuvre et des limites en termes de transfert de charge à l’interface fibre/matrice. Ces verrous pour le développement des biocomposites sont les lignes directrices de ce travail de thèse s'inspirant de la présence des interfaces au sein des tiges de chanv

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Kamat, Jaymini. "Effect of harvesting time on the physical, chemical and pulping properties of hemp, Cannabis sativa L." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0015/MQ53453.pdf.

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Mayembo, Evrard. "The influence of different chemical treatments on the mechanical properties of hemp fibre-filled polymer composites." Master's thesis, Faculty of Engineering and the Built Environment, 2021. http://hdl.handle.net/11427/33797.

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The fluctuation of engineering and general-purpose polymer prices, rapid exhaustion of fossil fuel world-wide reserves and heightened awareness about environment have led the research community to explore the use of natural biodegradable raw materials as substitutes for manmade resources. Natural fibres are considered as substitutes for synthetic fibres in reinforced polymer matrix composites. Increased interest has been shown in natural fibres from plants such as cotton, jute, hemp as replacements for aramid, glass, and carbon fibres. This is due to their biodegradability, low cost, low densi

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RIBEIRO, Ana Maria Motta. "O p?lo sindical do subm?dio S?o Francisco: das lutas por reassentamento ? incorpora??o do cultivo de maconha na agenda." Universidade Federal Rural do Rio de Janeiro, 2008. https://tede.ufrrj.br/jspui/handle/tede/1040.

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Made available in DSpace on 2016-04-28T20:19:53Z (GMT). No. of bitstreams: 1 2008 - Ana Maria Motta Ribeiro.pdf: 1483676 bytes, checksum: f690f9b834362b5dbb0eb9c9597a9fbd (MD5) Previous issue date: 2008-02-29<br>This paper tries to analyze, in a critical way, the syndicalism in the Polo Sindical do Subm?dio S?o Francisco, inserted in a region identified by the Press as the Hemp Polygon. It intends to understand, from the field work, the insertion of the subject of the hemp plantation (criminalized) in the agenda of the Polo Sindical do Subm?dio S?o Francisco. The study intends to understa

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Johnson, Jeffrey Brian. "Effect of flax and hemp seed oils on erythrocyte concentrations of eicosapentaenoic and docosahexaenoic acids in vegetarians." Thesis, University of Hawaii at Manoa, 2003. http://hdl.handle.net/10125/7037.

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Flax and hemp seed oils are rich sources of alpha-linolenic acid (ALA; 18:3n-3), which can be converted to eicosapentaenoic acid (EPA; 20:5n-3) and docosahexaenoic acid (DHA; 22:6n-3) in humans. We investigated the effects of these oils on erythrocyte concentrations of EPA, DHA, other fatty acids, and plasma lipids in healthy vegetarians. Twenty-two subjects consumed either one tablespoon of flax (7.1 g ALA) or hemp seed oil (2.2 g ALA) daily for twenty-eight days. Diet records were collected at baseline and during supplementation. Blood samples were collected at baseline and post-supplementat

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Hultkrantz, Martina. "An overview on the environmental impacts of synthetic leather made of hemp fiber with preliminary lifecycle assessment." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-233980.

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This report covers a preliminary life cycle assessment (LCA) on imitation leather made from hemp fiber (hemp leather) and a comparison to bovine leather, to examine whether hemp leather is an environmentally sustainable alternative. The bovine leather industry is responsible for heavy chemical use and emissions, detrimental effects to the environment as well as to human health. The United Nations (UN) and other organizations call for immediate action against the animal product industry sector to greatly reduce emissions and protect the environment. Hemp is a versatile plant that can be used fo

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Stringer, Carol Elizabeth. "EVALUATING HEMP (CANNABIS SATIVA) AS A FORAGE BASED ON YIELD, NUTRITIVE ANALYSIS, AND MORPHOLOGICAL COMPOSITION." UKnowledge, 2018. https://uknowledge.uky.edu/pss_etds/104.

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This experiment examined the forage potential of hemp (Cannabis sativa) and kenaf (Hibiscus cannabinus). The objectives were to evaluate yield and forage nutritive value (i.e. NDF, ADF, ADL, IVTD, and CP) fluctuations over the course of a growing season based on planting date, morphological composition, and management. Three types of hemp (grain, fiber, and a dual- purpose type) and kenaf were planted on two dates and were sampled approximately every two weeks throughout the growing season at the University of Kentucky (UK) Research Farm in Lexington, KY. Subsamples were separated into morphol

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CALZOLARI, DAVIDE. "OPTIMIZING CANNABIS SATIVA CULTIVATION TO INCREASE HIGH ADDED-VALUE COMPOUNDS IN SEED AND THRESHING RESIDUE." Doctoral thesis, Università Cattolica del Sacro Cuore, 2018. http://hdl.handle.net/10280/39868.

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Il rinnovato interesse nella coltivazione della canapa industriale non è stato supportato da studi approfonditi e generalmente si basa su esperienze dirette di coltivazione. Questo studio si prefigge come obbiettivo quello di sfruttare tutte la parti della pianta di canapa per migliorare l’economicità complessiva della sua coltivazione tramite l’uso di tecniche agronomiche e di pratiche post-raccolta. La Cannabis sativa ha un vasto campo di applicazioni, tra cui le più promettenti in termini di ritorno economico sono il cosmetico e il farmaceutico. I composti naturali più interessanti della Ca

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