Dissertations / Theses on the topic 'Cultivation'
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Record, Rachael A. "CULTIVATING MIRACLE PERCEPTIONS: CULTIVATION THEORY AND MEDICAL DRAMAS." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_theses/148.
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This thesis reports the results of a study designed to investigate the influence of exposure to televised medical dramas on perceptions of medical miracles. Four hundred and eighty-one college students participated in a survey in which they responded to different questions about their medical drama viewership and their different beliefs with regard to medical miracles. Results found that heavy medical drama viewers perceived belief in medical miracles to be less normal than non-viewers. Similarly, heavy viewers perceived medical miracles to occur less often than non-viewers. Interestingly, heavy viewers perceived medical dramas to be less credible than non-viewers. In addition, this study found that personal experience with medical miracles affected responses across all three measured viewership levels. The study concludes that, when compared to no exposure to medical dramas, heavy exposure has the potential for creating a more realistic view of medical miracles. Future research should continue to study genre-specific cultivation effects with regard to health perceptions.
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Arpayoglou, Irene. "Cultivation of Wrack Collected Seagrasses." NSUWorks, 2004. http://nsuworks.nova.edu/occ_stuetd/285.
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Beadman, Helen A. "The sustainability of mussel cultivation." Thesis, Bangor University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273559.
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Ashworth, Kirsti. "Atmospheric impacts of biofuel cultivation." Thesis, Lancaster University, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.654455.
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Biogenic volatile organic compounds play a key role in governing the rate of chemical production and loss of tropospheric ozone and formation of secondary organic aerosol, important atmospheric constituents which affect both climate and air quality. Isoprene is the most important of these compounds, both in terms of quantity emitted and subsequent reactions. The effects of changes in isoprene emissions due to land use change driven by the cultivation of biofuel feedstock crops in the near-future (2020s) have been evaluated. Two realistic biofuel cultivation scenarios were developed, based on current government targets for the replacement of transportation fuel with bio-ethanol and biodiesel. A series of simulations, using isoprene emissions, atmospheric chemistry and climate models, were performed to quantify the impacts. The two biofuel cultivation scenarios yield roughly the same quantity of fuel (180 Mt of oil equivalent per year), in line with projected global demands for biofuel in the 2020s. In each case, global annual isoprene emissions rose by around 1 %. The resulting changes in ground-level ozone concentrations were markedly different, with increases of as much as 10 ppbv over parts of Europe as a result of cultivation in the mid-latitudes, but decreases across much of the tropics due to oil palm cultivation. If co-located emissions of NOx from oil palm processing were included, ozone levels rose by up to 5 ppbv over SE Asia, highlighting the importance of controlling NOx emissions. The increases in ozone over Europe are projected to result in 1300 premature deaths and a 4% reduction r III in the wheat harvest. This is the first time that changes in biogenic emissions resulting from realistic land use changes driven by biofuel cultivation have been considered. The projected impacts on air quality and health indicate that such emissions are important in assessing the overall environmental effect of biofuels.
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Dobyns, Henry F. "Piman Indian Historic Agave Cultivation." University of Arizona (Tucson, AZ), 1988. http://hdl.handle.net/10150/609107.
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The lands occupied by northern Piman Indians yet display remains of old ways of life, the hallmark being ruins of massive "casa grande" style architectural complexes within puddled adobe walled compounds. Vestiges of "rockpile" fields occur on desert bajadas that seem to have little potential for traditional hispanic or anglo agriculture. Evidence has accumulated that critical population pressures once exerted heavy demands on the food supply in this region, with resultant internecine strife and competition, the massive walled architectural complexes functioning as defensible storehouses for food that was harvested from the resource area controlled or exploitable by the inhabitants. The rockpile fields were used for agricultural production of the sweet foodplant Agave, using an innovative technology that made use of agriculturally marginal land (see Desert Plants Volume 7, pp. 107 -112, 100). The European encounter of Pimans occurred to the south long before it occurred to the north, at a time when ways of life were rapidly changing. A rare glimpse of southern Piman life about 1613 by Rev. Andrés Pérez de Ribas presents an historic picture of Agave cultivation by people living in houses with massive puddled adobe walls. This Piman way of life at that time in the southern region is altogether consistent with the vestiges of what seems to have been the same lifestyle in the north. Old World diseases brought a general collapse of Native American populations; the pressures that generated casa grande style architecture, earth defensive walls, and Agave cultivation in Piman territory diminished, a terminal date for the complex more likely to have been after A.D. 1613 than the traditional date of "Classic Hohokam" demise about A.D. 1450. Introduction of Old World cultivars high in sugar (melons, peaches, apricots, quinces, pears, apples, sugar cane) also reduced Piman demand for sweet pulp of Agave. Watermelons were already substituting as a functional equivalent of Agave by 1698 among northern Pimans. Both the casa grande style ruins and the rockpile fields were abandoned by the time European civilization reached the northern Pimans. Both have been classified as "Hohokam" by archaeologists, using the plural of the Piman language word meaning "all used up" or "defunct."
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Emil, Axelsson. "Up-scaling of algae cultivation." Thesis, Luleå tekniska universitet, Industriell miljö- och processteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-60493.
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Microalgae are one of the oldest types of lifeforms on this planet and dead algae are one source for the oil that we extract from the ground. This oil has a major part in the technology advances of humanity, to levels unimaginable not long ago. Unfortunately, this oil is one of the major reasons for the global warming and other environmental issues caused by humans. Therefore, much effort is made on new technologies to decrease the use of fossil oil and other fossil material in favor for so called renewable sources. In this work focus is on production of biomass that can be used for processing to other bulk materials, mainly chemicals. This is also a highly potential market, the amount of materials derived from fossil sources are at least 422 million metric tons per year. The issue though is that the production costs for algae are still fairly high and can’t compete with the market price of fossil raw materials. Two algae species, Scenedesmus obliquus and Coelastrella sp., were cultivated in 6 pilot size ponds (500 L) and the results were compared to a lab experiment (0.5 L). The lab experiment was earlier performed by the author’s supervisors with the same species. The algae in the ponds were cultivated outdoor with flue gas in semi-closed ponds and the resulting biomass was allowed to sediment spontaneously. Scenedesmus obliquus was successfully cultivated in the pilot, but the system was not suitable for cultivation of Coelastrella sp. The main aim of this work was to evaluate if it is possible to predict the amount of biomass produced in the pilot cultivation based on the results from the previously performed lab cultivation. The conclusion based on the results in this work is that it not possible to predict the biomass production in the pilot based on lab experiments. The properties and behavior of different algae species can be very different in different systems, and the setups in this study differed too much. However, the results indicate that the pilot system has a high efficiency and can maintain a monoculture outdoors for at least 18 days as well as that the supply of flue gas highly affects the growth of the algae Scenedesmus obliquus.
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McDanal, Patricia Ann. "Developing a community cultivation team." Theological Research Exchange Network (TREN), 2002. http://www.tren.com.
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Fish, Suzanne K., Paul R. Fish, Charles Miksicek, and John Madsen. "Prehistoric Cultivation in Southern Arizona." University of Arizona (Tucson, AZ), 1985. http://hdl.handle.net/10150/554214.
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Gathering of wild agave for food and fiber is widely recognized in ethnographic accounts of Southwestern Indians. Historically documented cultivation is limited to small-scale plantings and has not established agave as a significant aboriginal cultigen. The apparent absence of agave as a cultivated staple among peoples of the Sonoran Desert contrasts with pre-Columbian and historic ubiquity of this crop further south. It is a major cultigen throughout the rest of highland Mexico, including areas in Durango and Zacatecas, often considered within the greater Southwestern cultural sphere. Current archaeological evidence suggests that agave figured more prominently in prehistoric Southwestern agriculture than in that of subsequent groups.
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Muller, Claudette. "The role of buchu cultivation (Agathosma betulina & Agathosma crenulata) cultivation in livelihoods and conservation." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/19985.
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Increased management through domestication is the predicted, and often necessary, commercialisation outcome of a wild resource which is subject to a demanding market that promotes competition amongst producers and the depletion of wild stocks. This has been the case for commercial buchu (Agathosma betulina and Agathosma crenulata), a historically wild collected plant which has been cultivated on a large-scale in selected areas of the Western Cape Province of South Africa. Buchu is an endemic, aromatic shrub around which a lucrative industry spanning diverse and distant markets has developed. Alongside its medicinal properties, buchu is primarily valued for its essential oil which is exported for use in international flavour and fragrant industries. The aim of this study was to conduct an overview of the local buchu industry with a focus on how cultivation has impacted on the general trade, the different actors involved and the conservation of the plant. A shift in buchu production to large-scale, agricultural enterprises raises certain questions for the involvement of rural harvesters in the trade, especially with regard to their inclusion and the sharing of benefits arising from commercialisation. Accordingly, this research sought to identify the social and economic impacts of buchu cultivation while also exploring the environmental impacts associated with large-scale farming of the plant. The methods employed in this research were primarily qualitative, based on semi-structured interviews conducted with key actors involved in the buchu trade, including harvesters, farmers, industry representatives and environmental authorities. The study revealed that while the harvesting of buchu is an important economic activity for harvester communities, the cultivation of buchu has played a limited role in local livelihoods with cultivation mainly being confined to large-scale, commercial operations in the hands of wealthy farmers and private processing companies. The findings of this research also shed light on the shortcomings of national access and benefit-sharing legislation which has failed to secure commercial benefits for the rural poor involved in the trade. From an environmental perspective, the cultivation of buchu has contributed to the conservation of the plant in the wild through offsetting harvesting pressures experienced by wild populations, but has also contributed to the destruction of naturally occurring vegetation.
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Liu, Keqi. "Conscientization and the Cultivation of Conscience." Thesis, University of Canterbury. Educational Studies and Human Development, 2012. http://hdl.handle.net/10092/7129.
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This philosophical study is set within Paulo Freire’s radical, critical and liberating pedagogical theoretical discourse. If conscientization is defined by Freire as the cultivation of critical consciousness and conscience, it not only provides a stimulus for better understanding of the root causes of human suffering and dehumanization or the loss of humanity but also brings full effect to humanization, an effective approach to address dehumanization problems. While the cultivation of critical consciousness tackles social system and ideological crises, the cultivation of conscience addresses human consciousness problems such as insatiable human desire represented in varying forms of egoism, ambition, lust, greed, and craving for social status. Thereby, as an educational initiative, conscientization can readily and sustainably maintain both self and social empowerment when it is deeply rooted in the praxis of changing the world.
The study attempts to achieve three major tasks. The first is to clarify what conscience is and what notion of conscience has internal coherence with the process of conscientization. The second is to determine how to cultivate conscience. The third is to incorporate the cultivation of conscience into conscientization. Like Freire, I draw on a number of different philosophical traditions and perspectives. Where necessary in order to illustrate particular theoretical points, consideration is also given to a number of literary works.
The notion of conscience is explored by tracing its historical development. The dialectical relation between consciousness and conscience − in particular, what causes their conflict − is also examined. The investigation of conscience concludes with identifying conscience as a unifying agent in its dialectical relationship with consciousness.
The investigation of the dynamism of conscience starts with the confirmation of conscience as the basis of morality. Thereafter, the discussion focuses on why conscience works in a moral sphere, which necessitates a transcendence of blind human biological desire and utilitarian concern for the self. The rationalist tradition of transcendence has undermined, segmented and alienated human life. The transcendent functions of love and dialogue, two ontological ways of human existence, offer an alternative and are justified as the effective mechanisms for cultivating conscience.
However, love and dialogue cannot resist armed injustice and inequality. This calls for the integration of the cultivation of conscience into conscientization. In so doing, the interrelatedness and interdependence between the cultivation of critical consciousness and the cultivation of conscience are examined while their distinctive and irreplaceable roles and functions are further specified. In terms of application, the educational and cultural significance of conscientization for the present and the future and possibilities for applying it to concrete educational discourses are explored.
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O'Rourke, Eric J. "Marijuana cultivation and the life-course." Thesis, California State University, Long Beach, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1528012.
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Life course criminology seeks to explain the factors that lead and deter individuals from engaging in persistent later-life criminality. However, the cultivation of marijuana has yet to be tested by life course related means. This thesis uses data from both the Marijuana Growers' Survey and the Belgian Marijuana Growers' Survey to examine the extent that life course related variables are associated with transitions within marijuana growers. Results suggest little support for life course related variables, and instead suggest that motivations are more important in dictating transitions associated with an increase in profit and operations. Implications of these results are discussed and policy recommendations are made.
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Batty, N. P. "Anther cultivation of Solanum tuberosum L." Thesis, University of East Anglia, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377711.
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Cuenca, Liliana. "Repeated batch cultivation of Schizosaccharomyces pombe." Thesis, University of Surrey, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.441865.
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Carrier, Rebecca Lyn 1973. "Cardiac tissue engineering : bioreactor cultivation parameters." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/8999.
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Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2000.Includes bibliographical references.
Tissue engineering may be useful in fighting heart disease since it offers the possibility of creating functional tissue equivalents for scientific studies and tissue repair. In the present work, we examined how variations in cultivation parameters of a model tissue engineering system influenced cardiac tissue morphogenesis. The central hypothesis was that using a tissue engineering system consisting of isolated cardiac cells, polymer scaffolds, and tissue culture bioreactors, we could engineer cardiac muscle mimicking native tissue in structure and function in the presence of appropriate biochemical and physical signals. The specific objectives were to: ( 1) vary key parameters of the model tissue engineering system, and (2) structurally and functionally characterize engineered cardiac muscle so that effects of parameter variations could be assessed and engineered tissue could be compared to native tissue. Effects of key cultivation parameters, including (I) cell source, (2) cell seeding density, (3) cell seeding vessel, and (4) tissue culture bioreactor on structure and function of engineered cardiac cell-polymer constructs were studied. Advantages of seeding mammalian cells at high densities (6-Sx 106 cells/Smm diameter x 2mm thick scaffold) under mixed conditions and culturing constructs in rotating laminar flow bioreactors were demonstrated, but constructs had interiors (> IOOμm tissue depth) consisting of mostly empty space due to diffusional mass transport limitations. We attempted to overcome diffusional limitations by directly perfusing culture medium through the constructs. Perfusion significantly improved the uniformity of the cell distribution and enhanced expression of a differentiated cell phenotype in comparison to non-perfused (i.e. flask) cultures. Control of the cell microenvironment in the perfusion system was also used to study relationships between oxygen tension and properties of cardiac constructs. Oxygen tension was directly correlated with DNA and protein contents (r=0.88 and 0.89, respectively), aerobic metabolism (r=0.97), muscle protein expression, and ultrastructural differentiation. Characterization of cardiac construct structure, composition, cell phenotype, and in vitro function demonstrated cardiac specific protein expression, metabolic activity similar to that of native tissue, and differentiated ultrastructural features (e.g. sarcomeres). The results support the utility of engineered cardiac muscle as a native tissue model for in vitro studies and eventually for in vivo tissue repair.
by Rebecca Lyn Carrier.
Sc.D.
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Ramirez, Eduardo B. "Mentorship in commercial domestic cannabis cultivation." Thesis, California State University, Long Beach, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10096070.
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Social learning theories of crime help explain criminal achievement through the learning process. Utilizing two prominent social learning theories, this thesis explores the under-researched relationship between mentorship and domestic cannabis cultivation. This thesis uses data collected from an online survey taken by growers in the United States, Canada, and Belgium to examine the extent that social learning related variables can predict commercial, large scale cannabis cultivation. Results show some support for social learning theories and suggest that learning definitions favorable to cultivation are a significant part of mentorship. Policy implications are also discussed.
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Starr, Greg. "Intriguing Chihuahuan Desert Yuccas in Cultivation." University of Arizona (Tucson, AZ), 2015. http://hdl.handle.net/10150/554339.
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Gustafsson, Greta, and Amanda Sivard. "Algae cultivations in Kenya- a sustainable solution? : An assessment and investigation over deepwater cultivation in Shimoni, Southern Kenya." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-283601.
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With a strong demand for aquatic products, seaweed is a promising application in a wide range of areas, such as food, medicine and energy. Kenya is seen as a country with great potential of expanding its seaweed industry, and by inspiration from the widespread production of algaes at Zanzibar, improvements and adaptations can be made to fit Kenya. One of the places with proper environmental conditions is Shimoni, situated in the south coast of Kenya, and the purpose of this report is to assist on the expansion of seaweed farming in Shimoni, by assessing the possibilities of deep-water cultivations at site, and mediate strengths, weaknesses, opportunities and threats with the technique. In addition, another purpose is also to map out important stakeholders for starting up and expanding the system. The methods SWOT-analysis and stakeholder mapping have been carried out by literature studies and interviews with local scientists. Results have shown that deep-water techniques are less demanding on the environment than cultivations in the intertidal area and may support the local environment if proper conditions are provided for. Seaweed cultivations have large potential as an additional livelihood opportunity in coastal communities, given that adjustments to changes in market prices and environmental conditions can be met. However, deep water methods require larger initial costs than the ones carried out in the intertidal, hence political and technical support may be crucial for launching the system. These processes may be implemented iteratively as business opportunities arise. In conclusion, field research covering non-expected local aspects is further recommended.Den globala efterfrågan av havsbaserade produkter ökar, och tycks inte mattas av. Algindustrin ses som ett lovande område att kunna bemöta detta behov på grund av sitt breda användningsområde. Mat, medicin och energi är bara några exempel på vad råvaran kan användas till. Kenya ses som ett land med stor potential att expandera sin nuvarande algindustri. Med inspiration av den närliggande storproducenten Zanzibar kan förbättringar och anpassningar göras för att passa in i Kenya. Ett område med bra miljöförutsättningar är Shimoni, beläget i södra Kenya, vilket är området denna rapport fokuserar på. Syftet med rapporten är att utvärdera möjligheterna för att utvidga algodlingar i området genom att studera potentialen hos djupvattenodling. Detta genom att analysera styrkor, svagheter, möjligheter och hot med den specifika tekniken. Syftet är vidare att kartlägga viktiga aktörer som kan ha betydelse vid en uppstart och expandering av odlingarna. Metoderna SWOT-analys och aktörskartläggning har gjorts med litteraturstudier och intervjuer med lokala forskare, som grund. Resultat har visat att djupvattentekniker är mindre påfrestande på miljön än odlingar belägna närmare strandkanten, och kan vara uppbyggande för den lokala miljön om rätt tekniker används. Algodling har en stor potential som en kompletterande sysselsättning i kustområden, om marknadspriset på råvaran höjs och att en viss miljöstandard upprätthålls. Dock så kräver djupvattenodlingar större initiala kostnader än tekniker som placeras vid lägre vattenstånd, vilket gör att politiskt och tekniskt stöd är avgörande för en möjlig uppbyggnad. Detta kan ske stegvis i takt med att nya affärsmöjligheter uppdagas. Slutligen rekommenderas fältstudier för att studera lokala aspekter som kan förekomma, vilka skiljer sig från litteraturen.
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O'Brien, Kendall. "The Cultivation of Eating Disorders through Instagram." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/6004.
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A profusion of research has been dedicated to the effects of new media on body image. In an attempt to explain the inflation of eating disorders, several researchers have turned to the cultivation theory, postulating that increased interaction with these medias will lead to internalizations of the messages they disseminate. The over presence of extremely thin models and actresses can create a new reality for media users, who begin to equate thinness with beauty, power, femininity and happiness. While an abundance of research has delved into the impact of this thin ideal through television and magazines, the Internet as a medium is relatively new territory. Untrodden further is the field of social media, and particularly Instagram. The aim of this study was to determine the potential of cultivation theory via Instagram and its users.
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Baton, Hannah Rachel. "Cultivation and wildness in middle English literature." Thesis, Royal Holloway, University of London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.497224.
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Donglei, Y. "Analysis of dynamic loading on cultivation implements." Thesis, University of Newcastle Upon Tyne, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376227.
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Mohammed, Saad Zakaria Mohammed. "Aspects of nursery cultivation of bivalve molluscs." Thesis, University of Liverpool, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328163.
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Singh, Kuntal. "Climate and rainfed rice cultivation in India." Thesis, University of York, 2017. http://etheses.whiterose.ac.uk/20237/.
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Enabling food production to keep pace with population growth in the face of global climate change is a significant challenge. Drought is predicted to occur more frequently under climate change, which is likely to reduce rainfed crop yields and thereby put at risk the agriculture communities in rainfed regions. Rice is a major crop that is cultivated by rainfed farmers and is therefore, vulnerable to increased variability in rainfall. The main aim of my thesis is to understand the climatic risks to rainfed rice cultivation, focusing on rainfed regions in India. I analysed historical data on monsoon and rice yield and found that more locations showed a drying trend than a wetting trend, and that within-season distribution of rainfall were a more important driver of yield than the total rainfall, or timing of monsoon. I used a climate envelope modelling approach to show that the distribution of rainfed rice can be modelled using climate variables, and that variables measuring water availability were more important predictors of rice distribution than temperature. Using climate projections from multiple general circulation models and representative concentration pathways, I concluded that by 2050, between 14% - 40% of current rainfed areas might become climatically less suitable for cultivating rice. Using rice yield trials data, I examined the yield performance of locally and widely-grown rice cultivars under water- and heat-stress. I found that cultivars showed greater yield decline under heat-stress than under water-stress. In addition, I found greater decline in yield under heat-stress in cultivars that were more drought-tolerant, suggesting potential trade-offs in continued improvement of drought-tolerant rice. I conclude that rainfed regions are at risk from climate change, and that rice yields are particularly vulnerable to short-term variability in monsoon rainfall. Trade-offs between water- and heat-stress tolerances suggest that the development of new rice cultivars needs to consider multiple plant traits and drivers of yield, in addition to drought-tolerance. Therefore, improving irrigation infrastructure for timely availability of water, and access by farmers to the most resilient crop varieties will reduce future climate risks for farmers.
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Ojo, E. O. "Photobioreactor technologies for high-throughput microalgae cultivation." Thesis, University College London (University of London), 2015. http://discovery.ucl.ac.uk/1462446/.
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The evaluation and optimisation of microalgae cultivation process for biomass, lipid and high value chemicals production requires experimental investigation of several interacting variables. This thesis addresses the development of a range of small-scale photobioreactor technologies and shows how they can be applied for rapid, early stage evaluation and scale-up of microalgae cultivation processes. In particular, the work focuses on the engineering evaluation of a novel shaken miniature photobioreactor (mPBr) and a single-use photobioreactor (SUPBr) that can be adapted for both phototrophic and heterotrophic cultivation. A prototype twin-well mPBr was initially designed and fabricated with light provided from cool white light emitting diodes (LED). This was scaled-out to a 24-well mPBr system (4 mL working volume) on a novel shaken platform. High power warm white LEDs provided a maximum light intensity of 2000 µmolm‾²s‾¹. In both systems, surface aeration (via a semipermeable membrane) and mixing were provided by orbital shaking. Real-time control of temperature, relative humidity and CO2 levels was achieved via incubator level control. Amongst the tested geometries of the mPBr, round base and pyramid base gave the best performance. The mass transfer coefficient (kLa) values in the 24-well were measured between 20 – 88 h‾¹ and visual observation of fluid hydrodynamics showed an increase in total surface area with increased shaking frequency. Negligible evaporation was observed at 90% relative humidity for light intensity of < 400 µmolm‾²s‾¹ and at 32 °C, while light intensity variation across the platform is in the range ± 20 µmolm‾²s‾¹. Evaluation of phototrophic culture kinetics of Chlorella sorokiniana in both mPBr designs showed good reproducibility between wells. The best culture performance occurred at 380 µmolm‾²s‾¹, 300 rpm and 5% CO2, where final biomass concentration and total lipid concentration achieved were 9 ± 0.2 gL‾¹ and 55% w/w respectively. The SUPBr comprised a transparent polymeric CultiBagTM operated on the illuminated rotary shaken platform described above. Mixing time values were determined over the range 40 - 220 rpm and were generally less than 40 s. Hydrodynamic studies showed three distinct flow regimes at various shaking frequencies: in-phase, transitional and out-of-phase. Under optimal flow regime, the highest cell concentrations achieved was 6.7 gL‾¹ ± 0.3. Doubling the total working volume resulted in 35 - 40% reduction in biomass concentration due to an increase in the light path length. Phototrophic scale-up criteria from mPBr to SUPBr was successfully achieved based on light–path length and kLa values. Comparison of final biomass concentrations showed similar performance of 6 ± 0.2 gL‾¹ and comparable total lipid production of 25 – 30% by weight at a light intensity of 180 ± 20 µmolm‾²s‾¹. Furthermore, application of the shaken 24-well system for heterotrophic cultivation of microalgae and scale-up to a 7.5 L stirred tank bioreactor was also shown. Cells were cultured in 24 parallel wells, shake flasks and a 7.5 L bioreactor with working volumes of 4 mL, 100 mL and 4000 mL respectively using glucose (10 gL‾¹) as the main carbon source. Constant k(L)a was chosen as scale-up criteria and the values range between 30 – 60 h‾¹. Final biomass concentrations showed good agreement in the range of 4.5 ± 0.5 gL‾¹ and total lipid production of 43 – 50% by weight for the three systems. Overall, the results show the utility of the mPBr and SUPBr technologies for the rapid evaluation and scale-up of both phototrophic and heterotrophic microalgae cultivation conditions.
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Haugrud, Nathan Hans. "Cultivation to Supplement Residual Herbicides in Sugarbeet." Thesis, North Dakota State University, 2018. https://hdl.handle.net/10365/29217.
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The migration of waterhemp (Amaranthus tuberculatus) into northern sugarbeet (Beta vulgaris) growing regions has prompted sugarbeet producers to utilize inter-row cultivation in their weed management program as no currently registered herbicides can control glyphosate-resistant waterhemp postemergence. Field experiments were conducted to evaluate cultivation efficacy on waterhemp and common lambsquarters (Chenopodium album) and to evaluate cultivation safety on sugarbeet. Cultivation efficacy experiments demonstrated cultivation removes 65% of waterhemp and has no effect on further waterhemp emergence, but can be deleterious to common lambsquarters control if cultivation is timed before sugarbeet canopy closure. The ideal time to implement inter-row cultivation in sugarbeet is after sugarbeet canopy is closed and can suppress further weed emergence. Cultivation safety experiments demonstrated three cultivations as late as August 16 had no effect on sugarbeet yield and quality. Cultivation is a valuable tool to control glyphosate-resistant weeds with no deleterious effects if used correctly.Sugarbeet Research and Education Board of Minnesota and North Dakota
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Haddad, Ola. "Soilless Cultivation of Edible Plants for Phytoremediation." Thesis, Stockholms universitet, Institutionen för naturgeografi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-185047.
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Food security and eutrophication are two issues proven to have severe impacts on both humanity and the environment. This study suggests improving the local food security by utilizing phosphorus and nitrogen, available in severe eutrophic small lakes, in local food production, thus turning eutrophication from a problem into a resource. The study theoretically experiments the possibility of using eutrophic water in a greenhouse, where hydroponics is used as a cultivation method. The eutrophic water is pumped from the lake into the greenhouse, and then to the hydroponic system, which is expected to remediate the water, returning clean water to the lake. The objective of this process is to phytoremediate eutrophic water and simultaneously, produce edible commercial plants. Finding the best matching lake and plant nitrogen to phosphorus (N:P) ratio, is of key importance to optimize the remediation process. Based on data from a literature review, edible plants N:P ratios are found lower than typical lake N:P ratios, suggesting that, in some cases, edible plants in the hydroponic system would require additional nutrients to grow optimally. Finding the best matching lake and plant N:P ratio is thought to optimize the remediation process. Matching the lake and plant N:P ratio was conducted in Python.
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Floberg, Karlsson Bill, and Jonatan Viitala. "Application of Apple pomace for Fungal Cultivation." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-21676.
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Apple pomace is a solid by-product acquired from pressing and crushing millions of tons of apple in juice-industries. It represents 25-30 % of the original fruit and consists of peels, seeds and pulp. This raw material has multiple applications due to its high carbohydrate and moisture content. This bachelor thesis evaluated the use apple pomace acquired from Herrljunga cider for the cultivation of a filamentous fungus to produce biomass and ethanol. Different pretreatment strategies were applied to the apple pomace to extract as much sugars as possible. Several batches were made by mixing pomace and distilled water at different ratios (g pomace per g water) and different water temperatures. Apple juice was produced by filtering soaked pomace using a fine fabric. Apple pomace suspensions were made by adding pomace and water without mixing it (non-homogenised) and homogenised suspensions by mixing with a kitchen blender. Some apple juice batches were pH adjusted to 5.5 to investigate the effect on the fungal growth. The batches were put in Erlenmeyer flasks, sterilised and inoculated with the fungal strain Rhizomucor that has been isolated from Indonesian leaves used for tempe preparation. The Erlenmeyer flasks were incubated in a water shake for 72 h. Samples were taken every 24 h to follow sugar and ethanol concentrations. The samples were analysed by HPLC (High-Performance Liquid Chromatography). The results showed that apple pomace suspension did not perform well compared to the apple juice since the suspension was too viscous and lacked oxygen for the fungus to grow properly in the solution. The apple juice did show a significant improvement compared to the suspension, however pH adjustment to 5.5 had a negative impact on the fungal growth. Cold pre-treatment with an apple pomace to water ratio of 1 g pomace /g water produced the most biomass, with a yield of 9.7 g biomass per kg dry apple pomace. For ethanol production, an apple pomace to water ratio of 1 g pomace /g water using hot water had the highest yield of 11.2 g ethanol per kg dry apple pomace.Äppelpressmassa är en solid biprodukt, producerad genom att pressa och trycka milliontals ton äpple i bland annat juiceindustrier. Den kvarstående massan motsvarar 25-30 % av äpplet och består utav skal, frön och fruktkött. Denna råvara har många tillämpningar då den har ett högt kolhydrat- och vätskeinnehåll. Detta examensarbete utvärderade användningen av äppelpressmassa från Herrljunga cider för att odla en filamentös svamp i syfte att producera biomassa och etanol. Massan blev utsatt för olika förbehandlingar för att extrahera så mycket socker som möjligt. Olika satser gjordes genom att blanda äppelpressmassa med vatten i olika förhållanden (g äppelpressmassa per g vatten) och olika vattentemperaturer. Äppeljuice producerades genom att filtrera blöt massa med ett fint tyg. Suspensioner gjordes genom att tillsätta vatten till massan och inte blanda det (icke-homogent). En annan variant gjordes genom att blanda äppelpressmassa och vatten med en mixer (homogent). Några utav äppeljuicesatserna pH justerades till 5.5 för att se hur det påverkade svamptillväxten. Satserna flyttades till Erlenmeyer flaskor, steriliserades och ympades med den filamentösa svampen Rhizomucor. Erlenmeyer flaskorna flyttades till ett skakvattenbad för att jäsa i 72 timmar. Prover togs var 24:e timma för att se socker- och etanolkoncentrationerna ändras. Detta analyserades med hjälp utav en HPLC. Resultaten visade att suspensionssatserna inte presterade bra jämfört med äppeljuicesatserna. Detta misstänks bero på att innehållet var väldigt visköst och hade lågt syreinnehåll för svampen att kunna växa. Att justera pH till 5.5 för äppeljuicesatserna visade sig inte vara bra, de presterade sämre jämfört med justerade satser. Förbehandlingen med en äppelpressmassa till vatten förhållandet på 1 g äppelpressmassa/1 g kallt vatten producerade mest biomassa med ett utbyte av 9.7 g torr biomassa per kg torr äppelpressmassa. För etanolproduktion hade förbehandlingsmetoden med en äppelpressmassa till vatten förhållandet på 1 g äppelpressmassa/1 g varmt vatten högst utbyte med 11.2 g etanol per kg torr äppelpressmassa.
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Racharaks, Ratanachat. "Cultivation of Nannochloropsis salina and Dunaliella tertiolecta Using Shale Gas Flowback Water and Anaerobic Digestion Effluent as Cultivation Medium." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406289883.
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Kapekele, Evans M. "Determinants of slash and burn the case of chitemene farming system in Zambia /." Pretoria : [s.n, 2006. http://upetd.up.ac.za/thesis/available/etd-02192007-163602.
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Beecher, Tim. "Studies on the water relations of the common cultivated mushroom (Agaricus bisporus)." Thesis, Cranfield University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341085.
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Sarma, Subrata. "Economics of Tobacco cultivation in West Bengal with special reference to its constraints and prospects." Thesis, University of North Bengal, 1993. http://hdl.handle.net/123456789/274.
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Das, Dilip Kumar. "An Economic analysis of Jute Cultivation in Cooch Behar District of West Bengal." Thesis, University of North Bengal, 1996. http://hdl.handle.net/123456789/307.
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Sengupta, Satyabrata. "Jute cultivation in the North Bengal region of West Bengal - its problems and prospects with special reference to period since independence." Thesis, University of North Bengal, 1994. http://hdl.handle.net/123456789/306.
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Lindström, Rignell Ludvig, and Claudia Nohlgård. "Design of a Cultivation Unit : Communicating the potential of reusing residual heat by using the design of a cultivation unit." Thesis, Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-77541.
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Today, climate change is one of the world's greatest challenges. The main cause of this is humans' emissions of greenhouse gases, which for instance occur when burning fossil fuels. A prerequisite for meeting this challenge is that society change the way energy is produced and used. In the pursuit of fighting climate change, it is therefore crucial to create awareness among people regarding energy use. The purpose of this thesis project is to design a cultivation unit which uses residual heat. In this way, we aim to create awareness regarding the reuse of energy that would otherwise be wasted in society. To achieve this, we have used an established design process and creative methods, such as workshops, focus groups and prototyping. The thesis project resulted in a concept for a cultivation unit that in an innovative way brings attention to the reuse of residual heat. The work has been carried out in collaboration with Luleå Energi, an energy company that supplies Luleå with energy, and works to create conditions for more sustainable energy use.Idag är klimatförändringar en av världens största utmaningar. Den främsta orsaken är människors utsläpp av växthusgaser, som bland annat förekommer vid förbränning av fossila bränslen. En förutsättning för att möta denna utmaning är att samhället förändrar det sätt energi produceras och används. En viktig del i strävan mot att bekämpa klimatförändringarna är därför att skapa en medvetenhet hos människor gällande energianvändning. Syftet med det här examensarbetet är att utforma en odlingsenhet som använder sig av restvärme, för att på så sätt uppmärksamma återanvändningen av den energi som annars går till spillo i samhället. För att uppnå detta har ett designarbete genomförts genom en etablerad designprocess och kreativa metoder, såsom workshops, fokusgrupper och prototyper. Examensarbetet resulterade i ett koncept för en odlingsenhet som på ett innovativt sätt uppmärksammar återanvändningen av restvärme. Arbetet har genomförts i samarbete med Luleå Energi, ett energiföretag som förser Luleå med energi och som arbetar med att skapa förutsättningar för en mer hållbar energianvändning.
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Taskila, S. (Sanna). "Improved enrichment cultivation of selected food-contaminating bacteria." Doctoral thesis, Oulun yliopisto, 2010. http://urn.fi/urn:isbn:9789514263576.
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Abstract
The aim of this work was to assess and improve the enrichment cultivation of food-contaminating bacteria prior to detection by means of RNA-based sandwich hybridization assay (SHA). The examples of beer-spoiling lactic acid bacteria (LAB) and food-borne Salmonella Typhimurium were selected based on their relevance in Finnish food industry. Also universal challenges affecting on the selection of the enrichment cultivation procedure are discussed, including some potential possibilities for improved enrichment cultivation. The results of this study may therefore be used for the assessment of the efficiency of bacterial cultivation in other applications.
The evaluation of the enrichment cultivation procedures prior to SHA lead to following conclusions: i) the enrichment cultivation procedure is necessary prior to rRNA-based SHA, and it directly influences the accuracy of SHA; ii) the improvement of the enrichment cultivation may allow faster recovery and growth of bacteria; iii) the improved recovery of bacteria can be achieved by reducing environmental stress factors in the enrichment culture; and iv) the growth of bacteria may be accelerated by assuring the selectivity of medium and allowing accessibility to growth factors. Several growth factors were studied by means of full factorial design and response surface modeling. Measured cell densities, as well as predicted lag-times and maximum growth rates in the bacterial cultures were used as responses.
The results show that small shifts in the cultivation conditions extend the lag-time and decrease the growth rate of both LAB and Salmonella. Besides adjusting the temperature and pH, the growth of LAB was facilitated by reducing osmotic and oxidative stresses in the enrichment medium. In this study, a novel enzyme controlled glucose delivery system was used for the first time in the enrichment cultivation of food-contaminating bacteria. The glucose delivery system improved the growth of LAB in single strain cultures and in actual brewing process samples. The recovery of injured Salmonella was also enhanced by using the glucose delivery system together with selective siderophore ferrioxamine E, both in terms of reduced lag-times and increased growth rates. Based on the SHA, the adjusted BPW broth enhanced the molecular detection of heat-injured Salmonella in meat.
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Vieira, Ima Celia Guimaraes. "Forest succession after shifting cultivation in eastern Amazonia." Thesis, University of Stirling, 1996. http://hdl.handle.net/1893/26668.
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Succession following shifting cultivation was studied in secondary forests (5 to 40 years old) and a primary forest in Bragantina region, Para, Brazil. Secondary forests covered 62% of the study area (89 km² ) and crops and pasture 18%. Soil analyses showed an increase in pH, exchangeable calcium, magnesium and potassium and a decrease of organic matter and exchangeable aluminium, immediately after burning. Organic matter and extractable phosphorus increased with forest age, exchangeable aluminium and potassium were the same in both secondary and primary forests and exchangeable calcium and magnesium remained higher in the secondary forests. The highest densities of individuals and the least basal area and height were found in the younger secondary forests. The number of woody species (≥5 cm dbh) 250-m2 plot ranged from 8 to 17 in the secondary forests and 17 to 27 in the primary forest. Ordination and classification of floristic data suggested four successional communities. The forests regenerated readily and studies showed: the largest seed bank (0-5 cm) in the 5-years-old forest (1190 ± 284 seeds m-2) and a decrease with age to 137 ±19 seeds m-2 in the primary forest; the highest seed rain in the 5-years-old forest (883 ± 230 seeds m-2) and least in the primary forest (220 ± 80); 46% of the smaller plants (≥1 m tall, < 5 cm dbh) were seedlings and 54% were sprouts in the 5-years-old forest but in the 10-years and 20-years-old forests, seedlings (81%) predominated; adult plants (≥5 cm db h) in 5 to 20-years-old plots regenerated mainly from sprouts. Even after about 90 years of shifting cultivation the region has the potential for forest regeneration and the soil nutrients are able to recover to values similar to those in the primary forest. This raises the hope that, if a land use plan for Bragantina could be implemented, then it would be successful.
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Jönsson, Åsa. "Organic apple production in Sweden : cultivation and cultivars /." Alnarp : Department of Crop Science, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200714.pdf.
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Broberg, Josephine, Molly Ericson, and Gustav Frid. "Biofuel : - Sustainability of the Jatropha cultivation in Zambia." Thesis, KTH, Industriell ekologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-143883.
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Gaensakoo, Rumpai. "High cell density cultivation of recombinant Escherichia coli." Thesis, University of Strathclyde, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248832.
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Nunes, da Silva Ramos Filipe José. "Identification of Suitable Areas for Offshore Macroalgae Cultivation." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-243911.
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Research in sustainable macroalgae aquaculture has been gaining hype (e.g. Seafarm) to provide advancements in new significant sources of food, feed, materials and bio-energy. Despite the fact that in Asia the offshore production of macroalgae is established for many decades, in Europe is still in its infancy. The issue on where to find suitable cultivation areas without conflicting with current uses to respect the environment and the socio-economic activities is a great challenge. This Master of Science thesis aimed to find suitable offshore areas in order to facilitate implementations of macroalgae cultivations in the Swedish West Coast. Thirteen criteria in environmental, economic and social sustainability aspects were identified and employed (e.g. Depth, Distance to Ports, and Natural and Preserved areas (NPAs)), and the tools Geographic Information Systems (GIS) and Multi-criteria Analysis (MCA) were used in the form of GIS-MCDA, an integrated method available in Idrisi. To aggregate the criteria, Boolean and Weighted Linear Combination (WLC) techniques were applied. The results showed that Boolean areas cover 537 km2 (6,98% of the study area). The best suitable areas, possessing the maximum suitability index 10, that resulted from two WLC models comprise 5 km2 (0,07% of the study area) and 26 km2 (0,34% of the study area) including and excluding the criterion NPAs as constraint, respectively. The results further indicated that GIS-MCDA models excelled in providing an overview for effective spatial decision-making. Both techniques play a role in suitability analysis and complement each other in finding an optimal site which could be carefully selected out of the identified areas. It is recommended that areas with a suitability index 10 be chosen inside Boolean suitable areas. Moreover, this study could act as a driving force to build a resilient planning framework that would boost sustainable placement and development of offshore macroalgae cultivations.
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Starr, Greg. "New World Salvias For Cultivation in Southern Arizona." University of Arizona (Tucson, AZ), 1985. http://hdl.handle.net/10150/609082.
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A compilation of information on New World Salvias which are adaptable for cultivation in southern Arizona is presented. Southern Arizona is restricted to mid- and low-elevation desert regions. Description, taxonomy, and horticulture of the genus are discussed. A key to species is provided for identification. Detailed descriptions, locale of native occurrence, and cultivation of twenty -seven taxa are included.
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Lennartsson, Patrik. "Zygomycetes and cellulose residuals : hydrolysis, cultivation and applications." Doctoral thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-3608.
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Zygomycetes is a class of fungi living worldwide as saprobes, as part of mycorrhizae, and as parasites. Humans have used some zygomycetes for centuries in the production of traditional foods, e.g. Indonesian tempe. In the present thesis, the experimental focus was on two zygomycetes strains, Mucor indicus CCUG 22424 and Rhizopus sp. IT. One of the distinguishing features of M. indicus is its dimorphism. The different cell forms were influenced by the culturing conditions. After inoculation, when the initial spore concentration was high (6-8×106 spores/ml), yeast-like growth dominated under anaerobic conditions. With a smaller inoculum, yielding 1-2×105 spores/ml, and access to oxygen, filamentous forms dominated. Only negligible differences in ethanol yield (390-420 mg/g hexoses), productivity (3-5 g/l/h), and inhibitor tolerance were observed. Differential expressions of probably four genes were observed between the yeast-like and filamentous growth forms. Lignocelluloses are a suitable substrate for cultivating zygomycetes, as they occur in abundance, particularly since zygomycetes, unlike Saccharomyces cerevisiae, can utilise pentoses. Lignocelluloses require pretreatment to achieve efficient hydrolysis of the cellulose. N-methylmorpholine-N-oxide (NMMO) was tested for pretreatment of spruce and birch. Reducing wood chip size and/or prolonged pretreatment, promoted hydrolysis yield. Best yields were achieved from <2 mm chips and 5 h pretreatment. The hydrolysate was used for fermentation with M. indicus, resulting in 195 and 175 mg ethanol/g wood, and 103 and 86 mg fungal biomass/g wood, from spruce and birch respectively. Orange peel is another potential substrate. However, the hydrolysate contained 0.6 % (v/v) D-limonene, ten times higher than the concentration inhibiting S. cerevisiae. M. indicus was more resistant and successfully fermented the hydrolysate, producing 400 mg ethanol/g hexoses and 75 mg fungal biomass/g sugars. Both M. indicus and Rhizopus sp. grew in 1.0 % and 2.0 % D-limonene, although the latter was unable to grow in the hydrolysate. A third substrate was also used, spent sulphite liquor (SSL), which is a by-product from sulphite paper pulp mills. The SSL was diluted to 50 % and used for airlift cultivations of Rhizopus sp. In 1.0 vvm aeration, up to 340 mg biomass/g sugars was produced. Prolonged cultivations generally decreased the protein (from 500 to 300 mg/g) and lipid (from 70 to 20 mg/g) contents. In contrast, the cell wall fraction, measured as alkali-insoluble material (AIM), increased (160-280 mg/g), as did the glucosamine (GlcN) content (220-320 mg GlcN/g AIM). The produced fungal biomass could serve as animal feed, e.g. for fish.Akademisk avhandling som för avläggande av teknologie doktorsexamen vid Chalmers tekniska högskola försvaras vid offentlig disputation den 9 februari 2012, klockan 10.00 i KS101, Kemigården 4, Göteborg.
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ljung, sofia. "Grow Social : Create connection & communication through cultivation." Thesis, Konstfack, Industridesign, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-7269.
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Vi lever i ett samhälle där individualismen blomstrar samtidigt som ofrivillig ensamhet är ett växande samhällsproblem som kommit att bli en hälsofråga.Genom urbaniseringen bor vi allt tätare, trots detta visar studier att vi känner oss ensammare i storstäder. Forskning visar även att en av de viktigaste källorna till ett långt liv, är social interaktion i vardagen. Något så enkelt som att säga hej till grannen.Det är ju inte så svårt, eller? Socioekologisk stadsutveckling handlar om hur man i stadsplanering kan fläta samman ekologisk och social hållbarhet. Utifrån kontexten “Grannar bosatta i lägenhet i Stockholm”undersöker jag hur jag genom design, kan bidra till detta arbete genom att ta fram ett förslag som kan appliceras på redan existerande boendeformer/miljöer vi ser idag. Grow Social är kombination av en produkt och tjänst med syfte att ”åka runt” och sprida fröer i lägenhetshus för att uppmuntra grannar till att odla lokalt, men framförallt,att få grannars sociala relationer att växa genom att odla och umgås. Genom Grow Social vill jag visa på att utvecklingen till hållbara boenden kan börja i det lilla.Att vi genom något så litet som ett frö, kan gå mot en framtid där social interaktion fyller en naturlig plats vid utformandet av våra boendemiljöer.
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Ghantous, Katherine M. "Use of flame cultivation as a nonchemical weed control in cranberry cultivation." 2013. https://scholarworks.umass.edu/dissertations/AAI3603087.
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Cranberry (Vaccinium macrocarpon Ait.) is a woody perennial crop that can remain productive for decades. Competition for resources between cranberries and weeds can depress cranberry farm yields, resulting in large annual crop losses. Renewed interest in reducing chemical inputs into cranberry systems has provided the motivation to evaluate methods, such as flame cultivation (FC), as potential nonchemical options for weed control. Also known as thermal weeding, FC exposes plants to brief periods of high temperature that causes the water in the plant tissue to expand rapidly, rupturing plant cells and leading to necrosis. Various FC methods have been used successfully in annual crops as both a preemergence and postemergence weed control, but few scientific reports have been published on the use of FC on perennial weeds in a woody perennial crop system. Dewberry (Rubus spp.), sawbrier (Smilax glauca), and common rush (Juncus effusus ) are cranberry weeds that are difficult to control, spread quickly and can cause significant crop loss. Flame cultivation may be an effective non-chemical means for controlling these weeds in cranberry systems. FC would ideally be used as a spot treatment for weeds growing in the cranberry canopy, as well as on larger non-production areas where cranberry vines are not as abundant, such as bog edges, ditches, and dikes. Using FC to treat weeds within the cranberry canopy will likely cause localized damage to cranberry plants immediately surrounding the weeds, thus cranberry response to FC is also of interest. The following experiments were designed to examine the response of weeds and cranberry plants to FC. Perennial plants rely on reserves of nonstructural carbohydrates (NSC) for growth and survival, thus the efficacy of FC treatments to weeds will likely be impacted by the timing and frequency of treatments as they relate to the specific carbohydrate cycles of targeted weeds, such as dewberry. An additional experiment studied the seasonal fluctuations of NSC in dewberry roots. Cranberry growers were also surveyed on their past experiences with FC, as well as their willingness to adopt FC if proven an effective method for controlling weeds.
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Chung, Chi Yen, and 鍾啟彥. "Implementing a Fruit Cultivation Management System Using RFID for Greenhouse Cultivation as Case Study." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/vr6u33.
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碩士亞洲大學
資訊工程學系碩士在職專班
102
Agriculture is an important industry providing people's livelihood with a stable economy, but pesticides and chemical fertilizers applied by the agricultural industry often have residues, resulting in the natural environment suffering a catastrophe, and humans also falling into victims. In addition, Taiwan's agricultural frequently affected by typhoons or heavy rains, farmers suffered heavy losses while consumers are also falling into victims. With advances in agricultural technology and the rise in greenhouse cultivation, isolated from the outside natural environment interference, the green house can provide the environment growing agriculture crops. Crops are planted in the close greenhouse, so pest invasion naturally reduce, thus reducing the use of pesticides. Through enhancing agricultural technology, fertilizer consumption per unit area of the greenhouse can be done through precise calculations without excessive problems. Therefore, greenhouse is just like a small plants. By using characteristics of the RFID technology, growers can more effectively manage the greenhouse based on different types of fruits, the growing season, fertilizer types, legitimate use of pesticides, etc... Allowing consumers enabling to master the production information so as to increase the value of agricultural products, the system also allows growers getting fast and efficient and creating a better profit. Using RFID readers and tags with readable and writable features integrated with a database, a fruit cultivation and management system can be implemented. The system, by using timely reading and writing features of RFID,can carry out greenhouse fruit cultivation for growers to record daily agricultural work in the integrated database, and the detailed records of each crop planting situations, including the usage history of pesticides, can be used to construct a full production resumes and provide consumers with safe, non-toxic, high-quality agricultural products so as to achieve a win-win situation.
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Tzu, Lai Hsiu, and 賴秀姿. "“Lao Tze”Virtue Cultivation Theory." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/53632570852580304892.
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碩士華梵大學
哲學系碩士班
101
As the external expression of conformity to the Way, virtue can be seen as its container or hypostatization. In its concrete manifestation, virtue can be either profound or ordinary; when put into action, it has the universal quality of non-action. Yet, due to the pernicious influence of modern society with its overriding emphasis on self-aggrandizement, even those with high ethical ideals find it difficult to live up to them, resulting in a gradual enervation of one’s basic moral fiber. To be sure, society does have its standards of ethics and morality, but these are second rate, little more than a stop-gap measure to offset the lack of inherent virtue. As a result, in advocating the cultivation of virtue and recovering the Way, it is essential to remain aware of the intimate relationship between virtue and the Way, such that they share the same attributes. The Great Way has spontaneous non-action as its focus and objective; both virtue and the Way are put into practice in the form of modesty, non-assertiveness, and yielding. As such, the cultivation of virtue and personal integrity is a process of subtraction, beginning inwardly and expanding outwardly; using modesty to remove attachment and purity to remove greed. With simplicity and purity as the basis, one returns to a state of child-like innocence impervious to the temptations of the material world, making it possible to know how much is enough, remain content, and regain one’s basic integrity. Thus, great emphasis is placed on gentleness and flexibility, such that through wisdom one becomes as a child, regaining one’s inherent virtue—the three treasures of benevolence, frugality, and not daring to put myself ahead of others. Benevolence is the selfless way in which a mother cares for her child; frugality is self-restraint and limiting one’s desires; not daring to put oneself ahead of others means modesty and non-competitiveness. By enhancing one’s virtuous nature one recovers the Way. Virtue and the Way form an organic unity which provides the basis for overcoming obstacles and bringing beauty into life. This is the truth of cultivation.
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許逸凡. "Reverse season planting cultivation system." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/25825010249810961939.
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碩士國立彰化師範大學
電子工程學系
104
Abstract In this study, we focus on the three elements of plant growing and invented a small-volume, plant-friendly cultivation system in which temperature, humidity, and light exposure are all fully under control. To create a plant-friendly environment, the plant cultivation system in this study generates an artificial lighting of 450nm to 650nm wavelength, which is beneficial to the plants’ photosynthesis process and helps to turn nitrite into nutrient and prevent nitrite leftover in the plants. In regard to temperature control, a PTC heater module is used to achieve the required temperature setting in the system. To achieve the designated humidity, a ceramic atomizer chip is used to break water into 2.5 μm particles and disperse them in the environment. From germination to maturation, plants in each stage of development react differently to temperature. Each kind of plant has different requirements for temperature and light exposure. To cater for all kinds of plants and the varying development stages, the plant cultivation system in this study is coded in the adjustment of the three essential elements of planting, offering the options of 20℃, 25℃, and 30℃ for temperature, 70%, 80%, and 90% for humidity, and 4hr, 8hr, and 12hr for light exposure, all of which can be adjusted as required at any time. It is also useful for the production test of seedling growing and planting. In this study, the cultivation system is also used for off-season cultivation, with which summer vegetables are cultivated in winter. As a result of the consumers’ desire for rare and fresh vegetables, no difficulty was ever had for selling this kind of vegetables. At the same time, the improvement of living standard has also prompted a yearly increase in the demand of such vegetables. Compared to ones that grow in the natural environment, the water spinach that grows in the cultivation system matured at least ten days faster. Off-season cultivation satisfies the market’s demand, and with the breadth of such prospect brings with it significant benefits for both the economy and the society.
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LIN, JUI-CHIH, and 林叡志. "Development of Algae Cultivation System." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/22314328095662934170.
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Huang, Chun-Lin, and 黃駿淋. "Microalgal Cultivation and Its Applications." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/80956818459619357964.
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碩士大葉大學
工學院碩士在職專班
102
The massive use of fossil fuel results in the decrease of energy resources, the increase in oil prices and the serious release of greenhouse gases into the atmosphere. Microalgal biomass contains high-valued components, such as lipid, carbohydrates, polyunsaturated fat and carotenoids. Neutral lipid and carbohydrates can be transformed into biofuels such as biodiesel and bio-alcohol as substitutes for gasoline and diesel. Also with biomass, we can develop medical as well as health products. Therefore, cultivation of microalgae for biomass is considered as the most efficiently platform for the absorption and recycle of CO2. The commercialized system for producing microalgae is more likely to use open type cultured system, although closed type system provides better pollution control and mass transportation efficiency. The major factors that have a giant impact on microalgae cultivation system are the CO2 transportation and the light supply. Most of the photobioreactors are sparged with air containing CO2. The rate of CO2 transported into culture is always far more than the need for the microalga growth. The efficiency of CO2 absorption is extremely low. Light supply has to avoid light inhibitory effect and the frond shadowing effect. Choosing or developing an appropriate microalgae cultivation system is raise the biomass productive efficiency and economic benefit.
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Koen, Kerry Jacqueline. "Cultivation of Combretum bracteosum (Hochst.) Brandis." Thesis, 2001. http://hdl.handle.net/10413/10208.
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In maximizing South Africa's floral diversity, plant propagators have begun exploiting the
rich array of indigenous plants, especially those with horticultural potential. Plants
previously unavailable to the professional and amateur gardeners alike, are legally
becoming common-place in nurseries. However, in promoting the trade of indigenous
plants to nursery-owners, rapid, easy and cost effective methods of propagating these plants
need to be established.
Combretum bracteosum is one such indigenous plant, the aesthetic appeal thereof exhibits
great potential for ornamentation, especially when flowering. In facilitating the introduction
of Combretum bracteosum into nurseries, small gardens or even pots, investigations carried
out aimed to determine and analyse quick and easy methods of propagating this plant. Of
the various propagation techniques considered, only one, micropropagation, required
specialized skill and training prior to carrying out the relevant procedures and protocols.
The two other techniques used, which are accessible to most plant propagators, were seed germination and propagation from cuttings.
Propagation by seed germination yielded less than optimal results from a commercial
perspective. Although the hard pericarp surrounding the embryo did not impose any
dormancy inducing mechanisms, such as the restriction of water uptake or the leaching of
an inhibitory compounds, it did act as a mechanical barrier to the emerging radicle and
roots. Recommendations for optimal Combretum bracteosum seed germination would be
to remove the protective pericarp completely, incubate imbibed embryos in complete
darkness at 25°C. After radicle emergence the germinating embryos could be moved into an alternating light: dark cycle.
A more viable and simpler alternative to seed germination, was propagation by stem
cuttings. Treating the cuttings with 10% and 50% or 75% of the commercially available Kelpak concentrate (using the Soak Method and Quick-dip Methods respectively), provided
the most promising results, with the rapid development of roots and subsequent vegetative
growth. Synthetic hormones such as IBA and NAA were also applied to the cuttings both
alone or in combination however, although callus growth was profuse, root development
was slow and unsubstantial, if any at all. Therefore, in recommending a protocol for the
successful rooting of Combretum bracteosum cuttings taken during spring, summer or early
autumn, the application of Kelpak at either 10% (Soak Method) or 50% (Quick-dip
Method) of the full strength solution, is advised. Subsequent to hormone treatment, the
cuttings still required attention with regard to nutrient supplementation as well as
atmospheric moisture and temperature regulation.
Success in generating Combretum bracteosum plantlets was obtained by germinating the
seed in vitro as well as stimulating axillary shoot elongation from nodal explants. Placing
the sterilized Combretum bracteosum embryo onto a nutrient rich basal medium (containing
no hormones) was sufficient to stimulate 100% germination. The frequent poor availability
of the seed may hamper the use of in vitro seed germination for commercial propagation
purposes. The use of nodal explants from in vitro germinated stock plants, is a rapid and
reliable means of generating a large seedling stock. Nodal explants excised from the newly
developed shoot were subsequently placed onto 0.5 mg.ℓ ¯¹ BA which encouraged axillary
bud elongation. After elongation, the lateral shoots were removed and placed onto a rooting medium (1.0 mg.ℓ ¯¹ IBA).
The more mature nodal explants, collected from parent plants growing in vivo, required
either a BA: NAA hormone combination or Kelpak to stimulate axillary shoot elongation,
with the latter being most successful. Root initiation followed the protocol described above.
Once rooted plantlets were hardened off they displayed a strong and vigorous growth,
which is desirable from a commercial perspective.
Upon maturity, the habit of many indigenous trees and shrubs could become too big for confined spaces such as the urban garden. Therefore, determining a means of modifying
the plants' habit in order to maintain its suitability as a smaller garden plant was important.
Treating the Combretum bracteosum plants with a 50 mg.ℓ ¯¹ paclobutrazol soil drench
proved most successful, with the desired effects being visible within a few weeks of initial
application. No negative morphological or developmental effects were noted on plants
treated with the dwarfing agent, conversely however, the treated Combretum bracteosum
plants were compact and bushy, with considerable visual appeal and aesthetic attractiveness.Thesis (Ph.D.)-University of Natal, Pietermaritzburg, 2001.
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Chen, Kuan-Yi, and 陳冠溢. "Study on Hydroponic Vegetable Cultivation Shelves." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/86277537640966217677.
Full textAbstract:
碩士遠東科技大學
電機工程研究所
103
Massive production of plants is closely related to the following conditions: lighting sources, humidity, concentration of carbon dioxide and nutrition. This thesis focused on growing different kinds of hydroponic plants under proper growing conditions by controlling wavelength, intensity of light and photoperiod of lighting sources. This thesis divided the hydroponic plants’ cultivation stage into: vernalization, germination, growth and robust phases. We used orthogonal array to regulate the conditions of plants’ growth of each stage, then took the best growing state for the experiments in the next stage. Since in each stage, the size of plants’ body was different, we used a kind of movable watering structure which can change its position according to plants’ size, in order to enhance the production of per unit area.