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1
Mosby, Dorothy E. "Me navel string is buried there : place language and nation in the literary configuration of Afro-Costa Rican identity /." free to MU campus, to others for purchase, 2001. http://wwwlib.umi.com/cr/mo/fullcit?p3013004.
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Khan, M. R. "Phytochemical study of some Costa Rican plants." Thesis, University of Strathclyde, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381696.
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Ravasio, Paola [Verfasser], Brigitte [Gutachter] Burrichter, and Heike [Gutachter] Raphael-Hernandez. "Black Costa Rica. Pluricentrical Belonging in Afra-Costa Rican Poetry / Paola Ravasio ; Gutachter: Brigitte Burrichter, Heike Raphael-Hernandez." Würzburg : Würzburg University Press, 2020. http://d-nb.info/1216828288/34.
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Kellon, Delanie. "Natural resource management in a Costa Rican watershed." Diss., Connect to online resource - MSU authorized users, 2006.
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Alexander, Laura. "Comparative Biology of Three Species of Costa Rican Haeterini." ScholarWorks@UNO, 2014. http://scholarworks.uno.edu/td/1843.
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Documenting life history characteristics of populations, especially of herbivorous insects such as butterflies, is fundamental to the ecological study of tropical rainforests. However, we know relatively little about tropical forest butterflies. Here, I combine information gathered using the mark-release-recapture (MRR) approach with manipulative and observational experiments in a natural environment to explore aspects of the population biology of three closely-related species of Costa Rican fruit-feeding understory butterflies (Cithaerias pireta, Dulcedo polita, and Pierella helvina), specifically: vertical stratification, attraction to and persistence in fruit-baited traps, relative abundance and distribution, movement patterns, probabilities of recapture and daily survival, and factors that affect those probabilities. Among the three focal species there were differences in capturability, recapturability, spatial distribution, and degree of vertical stratification. Males appear to fly within smaller home ranges than females, and P. helvina can traverse the entire forest reserve in a single day. These findings have implications for the genetic diversity of these populations and for the risk of local extinction in the face of changing ecological conditions.
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Crowe, Jennifer. "Heat exposure and health outcomes in Costa Rican sugarcane harvesters." Doctoral thesis, Umeå universitet, Epidemiologi och global hälsa, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-93609.
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Background The remarkably efficient mechanisms of the human body to maintain its core temperature of 37°C can be inadequate when harsh climatic conditions and excessive muscle movement lead to heat stress, dehydration and potential heat illness, ranging from minor symptoms such as fatigue to a potentially fatal heat stroke. Agricultural workers in the tropics are at high risk, which is expected to increase with climate change. Sugarcane harvesting in Costa Rica is largely done by cutting the cane with a machete, by temporary, sub-contracted workers who are often migrants and living in poverty. Sugarcane harvesters are known to be affected by an epidemic of chronic kidney disease of non-traditional origin, currently hypothesized to be related to working conditions. Objectives This work aimed to better understand and document sugarcane harvester exposure to heat and the health consequences of working under such conditions. Specific objectives were to 1) Document working conditions and heat in the Costa Rican sugarcane industry (Paper I); 2) Quantify heat stress exposures faced by sugarcane harvesters in Costa Rica (Paper II); and 3) Quantify the occurrence of heat stress symptoms and abnormal urinary parameters in sugarcane workers in Costa Rica (Papers III and IV). Methods This study took place over three harvests following a pilot assessment prior to the first harvest. Methods included direct observation, semi-structured interviews with 24 individuals and a participatory workshop with 8 harvesters about heat-related perceptions, exposures and coping strategies during the harvest and non-harvest season (Pilot). Researchers accompanied workers in the field during all three harvests, measured wet bulb globe temperature (WBGT) and conducted direct observation. Heat exposure assessment was conducted by calculating metabolic load, WBGT and corresponding limit values based on international guidelines (NTP and OSHA) (Harvest 1). Self-reported symptom data were collected using orally-administered questionnaires from 106 sugarcane harvesters and 63 non-harvesters from the same company (Harvest 2). Chi-square test and gamma statistic were used to evaluate differences in self-reported symptoms and trends over heat exposure categories. Finally, liquid consumption during the work shift was documented and urinalysis was conducted pre-and post-shift in 48 sugarcane harvesters on three days; differences were assessed with McNemar´s test on paired proportions (Harvest 3). Results Sugarcane workers in both the harvest and non-harvest seasons are exposed to heat, but particularly during the harvest season. Field workers have to carry their own water to the field and often have no access to shade. Some plantworkers are also exposed to intense heat. The metabolic load of sugarcane harvesting was determined to be 261 W/m2. The corresponding threshold value is 26 ◦C WBGT, above which workers should decrease work load or take breaks to avoid the risk of heat stress. Harvesters in this study were at risk of heat stress as early as 7:15 am on some mornings and by 9:00 am on all mornings. After 9:15 am, OSHA recommendations would require that harvesters only work at full effort 25% of each hour to avoid heat stress. Heat and dehydration symptoms at least once per week were experienced significantly more frequently among harvesters than non-harvesters (p<0.05): headache, tachycardia, fever, nausea, difficulty breathing, dizziness, and dysuria. Percentages of workers reporting heat and dehydration-related symptoms increased over increasing heat exposure categories. Total liquid consumed ranged from 1 to 9 L and differed over days (median 5.0, 4.0 and 3.25 on days 1, 2 and 3 respectively). On these same days, the two principle indicators of dehydration: high USG (≥1.025) and low pH (≤5), changed significantly from pre to post-shift (p=0.000 and p=0.012).Proportions of workers with proteinuria >30 mg/dL, and blood, leucocytes and casts in urine were also significantly different between pre and post-shift samples at the group level, but unlike USG and pH, these alterations were more frequent in the pre-shift sample. 85% of workers presented with proteinuria at least once and 52% had at least one post-shift USG indicative of dehydration. Conclusion Heat exposure is an important occupational health risk for sugarcane workers according to international standards. A large percentage of harvesters experience symptoms consistent with heat exhaustion throughout the harvest season. Pre and post-shift urine samples demonstrate dehydration and other abnormal findings. The results of this study demonstrate an urgent need to improve working conditions for sugarcane harvesters both under current conditions and in adaptation plans for future climate change.
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Anderson, Duane. "The Costa Rican evangelical pastor his person and his ministry /." Theological Research Exchange Network (TREN), 1999. http://www.tren.com.
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Bravo, Vanessa. "The Costa Rican press on the Internet the first ten years /." [Gainesville, Fla.]: University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0000651.
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Carballo, Arce Ana F. "Phytochemical Investigations of Costa Rican Marcgraviaceae and Development of Insecticide Synergists." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/30315.
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Substances of natural and synthetic origin were studied using analytical, bioassay guided isolation, metabolomics and medicinal chemistry techniques. In a section focused on the plant family Marcgraviaceae, a validated method for the quantification of six pentacyclic triterpenes (α and β Amyrin lupeol, ursolic acid, betulin and betulinic acid) in the Souroubea spp was developed. Quantification of the triterpenes in the crude extracts was achieved using HPLC-APCI mass selective detection. The calibration curves for the five triterpenes evaluated were highly linear (r2 >0.993) and percentage recovery from spiked samples were greater than 94% for all compounds. The LOD for betulinic acid was 0.01 µg for betulinic acid on column and LOQ was 0.03 µg. The method was successfully applied to 41 crude extracts from leaf and stem of Souroubea spp, from two locations in Costa Rica. The method is suitable for quality control of raw materials used in the manufacture of natural health products. The use of modern metabolomic techniques, UHPLC-QTOF allowed the identification of five putative makers that can potentially be used in distinguishing between the two Souroubea species.
The validated method was used in the quantification of the above triterpenes in a total of thirteen Marcgraviaceae species collected in Costa Rica. It was established that betulinic acid and β- Amyrin could be used as makers for this family of tropical vines. These same thirteen plants extracts were evaluated in antifungal and quorum sensing inhibition bioassays. Marcgravia nervosa was the only species that showed significant activity in both bioassays. Bioassay guided fractionation of the crude ethanolic extract of M. nervosa led to the identification of 2-methoxynaphthoquinone as the bioactive compound responsible for the bioactivity. The crude leaf ethanolic extract from M. nervosa showed a significant inhibition of QS comparable or somewhat better than D. pulchra extracts with the M. nervosa extract showing stronger inhibiting QS with a halo of 21.8mm, more than D. pulcra extracts which generated a halo of 15.9mm. The active quinone has a MIC of 85 µM against Saccharomyces cerevisiaBY4741 (haploid) and 100 µM against Saccharomyces cerevisiae BY4743 (diploid) compared to berberine (positive control) with a MIC 600 µM for both strains. This quinone is not present in any of the other twelve species of Marcgraviaceae available to us.
In work focusing on organic synthesis, a total of 57 semi-synthetic derivatives of dillapiol, safrol and piperonal were prepared and evaluated for their inhibitory activity in a CYP 3A4 bioassay to assess their potential use as pesticide synergists. The synergistic activity of dillapiol has been improved 45 fold; analog 31 has an IC50 = 0.2 µM compared with dillapiol IC50= 9.18 µM. A number of other compounds structurally related to 31 showed similar levels of activity.
A screening of a compound library identified the amino sulfoxide 3 as a potential lead for the design of a selective connexin blocker with potential application in the treatment of spinal cord injuries. The use of X-ray crystallography permitted the correction of the original structure assigned to 3. Once the structure was corrected a total of 6 analogs were prepared. Compound 3 has the highest inhibition of GJIC whereas compound 8 and compound 2, reduced anionic hemi-channel activity. Compound 2 also reduced the cationic activity of the hemi-channels.
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Matulis, Brett Sylvester. "Payments for ecosystem services and the neoliberalization of Costa Rican nature." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/10004.
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“Payments for ecosystem services” (PES) represents a new form of environmental governance rooted in the logics of capitalist economics. As such, PES frequently produces new conceptions and material forms of nature that embody the principles of neoliberal ideology. This thesis explores the processes by which these policies have been deployed and taken root in Costa Rica, one of the foremost sites of financialized conservation worldwide. It provides a historical account of policy formation and the neoliberalization of Costa Rican nature. I situate this analysis in a critique of capitalist logic, explaining the particular type of neoliberalization that emerges as a consequence of capital's own internal contradictions. I place particular emphasis on ideological inconsistencies in the deployment of neoliberal ideals while highlighting the justice implications that inevitably still emerge. I do so by adopting a critical political-ecology perspective that sees questions of environmental management as fundamental questions of social and environmental justice – how are conservation mechanisms designed, by whom, for what purposes, and to whose ultimate benefit? Specifically, I consider three aspects of neoliberalization in Costa Rica's national Pagos por Servicios Ambientales (PSA) program: the design of a new market-like financing mechanism; the promotion of individualized contracting and participation; and the expansion of exclusionary land management practices. I show that these actions produce the conditions for uneven development, facilitate the consolidation of control over resources, and enable the accumulation of benefits among larger, wealthier landowners. I further explore conceptual understandings of neoliberalism (as ideology or process) and address the growing concern in the critical literature with ways that policy deviates from doctrine. I explain that such an emphasis on ideologically divergent practice distracts from the material and justice effects of encroaching neoliberalization, which invariably operates in partial and unfinished ways. Finally, I revisit the role of the internal contradictions of capital in producing the patterns of governance that constitute this era of neoliberal environmentalism.
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Ortiz, Castro Ivette, and Castro Ivette Ortiz. "Trained Abroad: A History of Multiculturalism in Costa Rican Vocal Music." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/621142.
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This document examines and analyzes solo vocal music composed by several Costa Rican composers who did not remain in Costa Rica, but rather left the country to study abroad. Unlike prior studies of Costa Rican vocal music, which have focused upon the use(s) composers made of indigenous folk elements, this study identifies foreign, non-indigenous elements that were introduced into Costa Rican vocal music by musical pioneers such as Julio Fonseca (1885-1950) and Dolores Castegnaro (1900-1979), composers who studied at various times in Italy, Belgium, France and Mexico. Excerpts of their music have been analyzed for this document to demonstrate specific international influences. Another two composers were selected due to their present importance in Costa Rican music: Eddie Mora and Marvin Camacho. In a very distinctive manner, these composers bring to the musical environment of Costa Rican diversity and exoticism in Eddie Mora's case and a mix of contemporary with Costa Rican elements with Marvin Camacho's music. In analyzing the music of these four composers, this research intends to present the different influences of other countries into Costa Rican music while Marvin Camacho brings back its own Costa Rican voice.
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Arguello, Salvador Carleton University Dissertation Journalism and Communication. "The Impact of the Internet in Costa Rican journalism and society." Ottawa, 1996.
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Lock, Casi Grigsby Mary. "Protection, production, prosperity Costa Rican farmers respond to the windbreaks project /." Diss., Columbia, Mo. : University of Missouri--Columbia, 2008. http://hdl.handle.net/10355/5666.
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The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on September 25, 2009) Thesis advisor: Dr. Mary Grigsby. Includes bibliographical references.
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Gonzalez, Patricia. "Intercultural adjustment problems of Costa Rican students in the United States." PDXScholar, 1989. https://pdxscholar.library.pdx.edu/open_access_etds/4054.
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The purpose of this study is to determine the adjustment problems Costa Ricans face while living and studying in the United States. The main concern of this thesis is to identify the intercultural communication problems that arise fundamentally from differences in value systems.
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Hatt, Kierstin C. "Development, transnational power, and environmental degradation : a case study of the Costa Rican banana industry." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36950.
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This dissertation undertakes a comprehensive analysis of the Costa Rican banana industry, including a case study based on fieldwork at an independent banana plantation in Costa Rica's Atlantic zone. A basic premise is that a coherent understanding of the banana industry and its consequences can only be achieved through the appreciation of the complexity of its organization. That is, the Costa Rican banana industry is a political-economic, socio-cultural, and environmental system articulated through a high degree of interaction at the micro and macro levels. Modernization and world systems theories are shown to provide partial and insufficient accounts of the dynamics at work in the Costa Rican banana industry. An embedded model of world systems theory, which includes aspects of sustainable development, is proposed to address these concerns. The analysis at various levels is intended to support the argument that consideration of environmental dynamics must be addressed in future theoretical accounts of development.<br>Following world systems theory, the strong role of the banana transnationals within the industry and in relation to national development is examined. Other links between the Costa Rican banana industry and the broader international political economy are also examined, including the 'banana wars', as well as environmental issues, such as DBCP and other agrochemical usage. Significant changes in the Costa Rican banana industry since the 1980's are considered. These include: (1) a sharp increase in banana production, and an increase in independent banana producers, (2) the dissolution of the banana unions, and their replacement with a new system of labour relations (solidarismo); and (3) the recent concern for issues of environmental destruction. These changes, combined with the centrality of the banana industry to Costa Rican development, have resulted in significant consequences at the micro level. These are manifested in the organization of banana production and in operations on the plantation, as seen with respect to working conditions, quality control and of transnational power. In addition, environmental degradation, and underdevelopment and marginalization beyond the plantation are examined as direct consequences of the Costa Rican banana industry. This is supported with extensive ethnographic detail.
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Hollander, Amy L. "Exceptions to Costa Rican Exceptionalism: National Identity, Race, and Nicaraguan Labor Migration in Costa Rica's Tourism Industry." Scholarship @ Claremont, 2013. http://scholarship.claremont.edu/scripps_theses/181.
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Exceptions to Costa Rican Exceptionalism attempts to locate the complex relationship between tourism and inequality in Costa Rican society across intersections of race and class at multiple levels of Costa Rican society. I examine the power dynamics between “the tourist” and the object of the tourist gaze, Costa Rica and Costa Ricans, Costa Rican citizen-nationals and “peripheral” racial minority citizens, and the peripheral citizen and the undocumented national “other.” This study seeks to arrive at a more complex understanding of how racial and class hierarchy is constructed in Costa Rica by analyzing the role of Costa Rica’s large-scale international tourism campaign in perpetuating that construction. I argue that Costa Rica’s national identity formation depends upon the racialization of “exceptional” political, economic, and social achievements, thereby drawing the boundaries of national belonging and citizenship according to certain features of race, gender, and class. As one of the largest economic sectors in Costa Rican society, tourism plays a significant role in the reproduction and dissemination of the “exceptionalist” construction of Costa Rican identity.
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Quiros, Luis Diego. "The loss of sacredness in the traditional Costa Rican Bribri conic house." Kansas State University, 2002. http://hdl.handle.net/2097/36082.
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Mendez, Monica. "EXPERIENCES, ATTITUDES AND BELIEFS ABOUT INTERPERSONAL VIOLENCE: A STUDY ON COSTA RICAN ADOLESCENTS." Doctoral diss., University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3045.
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Research in Latin America regarding interpersonal violence and adolescents is rare if not nonexistent. In a collaborative effort with the Costa Rican Ministry of Education and the National Institute of Women (INAMU), qualitative data were collected from three high schools and one after-school program from rural and urban locations of the Central Valley. The discussion groups/open-ended questionnaires were done with a total of 154 students ranging from ages 14 to 17 and grade levels 8th to 12th. Information was obtained concerning students' perceptions, definitions and opinions on issues relating to interpersonal violence and gender roles and rules. The results show that the students made distinctions between acceptable and unacceptable uses of violence, supporting the idea behind a dichotomy of deviant and non-deviant interpersonal violence behaviors. In addition, students also recognized the overarching and detrimental existence of the machismo culture in society, which, in their eyes, perpetuates interpersonal violence. They were also generally unaware of any help that existed for abused adults, adolescents or children. Results show that the machismo culture that affects the socialization of adolescents is well recognized among adolescents and perceived as a detriment to people through gender role expectations and the use and perpetuation of interpersonal violence.<br>Ph.D.<br>Department of Sociology<br>Sciences<br>Sociology PhD
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Morgan, Brendan C. "EFFECTS OF REDUCED DETRITUS ON INVERTEBRATE COMMUNITY STRUCTURE IN COSTA RICAN HEADWATER STREAMS." Kent State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=kent1430932604.
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Ramirez, Castrillo Ana Catalina. "Costa Rican Composer Carlos Escalante Macaya and his Concerto for Clarinet and Strings." Diss., Temple University Libraries, 2014. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/272856.
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Music Performance<br>D.M.A.<br>The purpose of this monograph is to promote Costa Rican academic music by focusing on Costa Rican composer Carlos Escalante Macaya and his Concerto for Clarinet and Strings (2012). I hope to contribute to the international view of Latin American composition and to promote Costa Rican artistic and cultural productions abroad with a study of the Concerto for Clarinet and Strings (Escalante's first venture into the concerto genre), examining in close detail its melodic, rhythmic and harmonic treatment as well as influences from different genres and styles. The monograph will also include a historical context of Costa Rican musical history, a brief discussion of previous important Costa Rican composers for the clarinet, a short analysis of the composer's own previous work for the instrument (Ricercare for Solo Clarinet) and performance notes. Also, in addition to the publication and audio/video recording of the clarinet concerto, this document will serve as a resource for clarinet soloists around the world. Carlos Escalante Macaya (b. 1968) is widely recognized in Costa Rica as a successful composer. His works are currently performed year-round in diverse performance venues in the country. His compositions vary widely, including orchestral, choral, and chamber music works, as well as music for dance, theater, and film. He is associate composer for the national dance and theater companies, and also receives many other commissions. He has received important national and Latin American composition awards, but his music, as that of other Costa Rican composers, is yet to be discovered outside of Latin America. Only one book, Música académica costarricense: Del presente al pasado cercano (2012), includes a commentary on Carlos Escalante Macaya. In it Costa Rican musicologist Ekaterina Chatski briefly analyzes two of his most important compositions: Los huesos tristes, commissioned in 2006 for the Choreographer's Festival, and Sinfonía Centenario (1997), winner of the Latin American Composition Competition of the centenary of the National Theater of Costa Rica. This book also includes a short biography of the composer and a list numbering 81 of his compositions up to the year 2008. The composer provided most materials necessary for my study, including multiple scores, inspirational visual materials, as well as a full interview (completed August 12, 2013) that will be included as an appendix. It is also important to mention that this concerto was written for me. The composer made significant effort to create a piece that would be, in his own words, a "perfectly fitted dress." My feedback ultimately made this piece what it is today, and my premiere of it on September 14, 2012, with the National Symphony Orchestra of Costa Rica, was an absolute success. This piece was so well received by the Costa Rican public that it was included in the National Symphony Orchestra of Costa Rica's latest CD recording of Costa Rican Music Composers. This recording is the first album of the National Symphony Orchestra to include a solo artist, so it is an honor for me to have been part of this wonderful project. Having been involved in all stages that brought this piece to life, I believe I am in the best position to present an analysis of the piece, to provide a historical background, and to offer performance recommendations for the future.<br>Temple University--Theses
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Méndez, Mónica. "Experiences, attitudes and beliefs about interpersonal violence a study on Costa Rican adolescents /." Orlando, Fla. : University of Central Florida, 2008. http://purl.fcla.edu/fcla/etd/CFE0002105.
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Sorensen, Troy Christian. "Tropical dry forest regeneration and its influence on three species of Costa Rican monkeys." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq28990.pdf.
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Sawchuk, Dana Marie. "The Costa Rican Catholic Church, social justice, and the rights of workers, 1979-1996." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ59070.pdf.
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Castro-Fernandez, Pedro Luis. "Optimization of laboratory performance of hot mixed asphalt concrete with Costa Rican raw materials." abstract and full text PDF (free order & download UNR users only), 2006. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3209957.
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Matulis, Brett Sylvester. "Costa Rican ecotourism and the (re)construction of social-natures on the Osa Peninsula." Online access, 2008. http://content.wwu.edu/cdm4/item_viewer.php?CISOROOT=/theses&CISOPTR=293&CISOBOX=1&REC=3.
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Dobbin, Kristin B. "Co-Management and the Fight for Rural Water Justice: Learning from Costa Rican ASADAS." Scholarship @ Claremont, 2013. http://scholarship.claremont.edu/pitzer_theses/33.
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Rural communities have, for much of history, been left with inadequate or no water service. This is because the traditional state/private dichotomy of water provision is inadequate for addressing the unique needs of small, isolated communities. Drawing from the Common-Pool Resource literature, co-management arose in recent decades as a solution to address this pandemic of rural water exclusion. In Costa Rica, co-management takes the form of community water associations known as ASADAS. This thesis explores the successes and challenges of ASADAS through the use of three case study communities. Using interviews, surveys, water sampling and national legislation in addition to secondary sources, this thesis seeks to understand the possibilities and limits of employing co-management as a tool for achieving the human right to water in Costa Rica and around the globe.
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Mesalles-Jorba, Luis. "Pressure group influence on policymaking : the case of the Costa Rican nationalized banking system /." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487688973683163.
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Gregory, Amy Ellen. "A discourse-pragmatic analysis of indicative and subjunctive mood use in Costa Rican Spanish /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.
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Solano, Patiño César. "Decision-making profiles, managerial capacity, management and performance : a study of Costa Rican dairy farmers." Thesis, University of Edinburgh, 2000. http://hdl.handle.net/1842/27436.
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The decision-making process, as the human component of the system, has been either neglected or oversimplified in many ways producing negative effects on the development of useful and fully adopted decision-support systems and in the identification of research priorities, recommendation domains, targets and media in technology transfer activities. These weaknesses of the Farming Systems Research and Extension have diminished their impact in producing development in agriculture. The study of this process seems to be fundamental to overcome the above explained weakness through incorporating the human "block" in the building process that is already taking place within this discipline of the agricultural sciences. The aims to this thesis were: 1-To develop a conceptual model of the decision-making process based on the literature and identified key issues to be studied. 2-Study the Objectives hierarchies, the Decision-making units and the Personal Information sources, as components of the process, in terms of factors affecting them and defining the population profiles. 3-Quantify the impact of these decision-making profiles on management and on the bio-economical performance of the farms. The conceptual model developed showed a very complex decision-making process with multiple components, steps, information flows, actors and activities. Three aspects i.e. Objectives, Decision-making units and Personal information sources, were identified as very relevant to be studied. Results showed that a synergetic affect of age, educational level and the dimension of the farm had the biggest impact on the Objectives hierarchies, Decision-making units and actors involved, and on the preferences towards different personal information sources. In terms of Objectives hierarchies, a very diversity of orientations was found, from the monetary maximisation to familiar and personal orientations, being the former the most frequent. In terms of Decision-making units the results showed that the importance of the units depends, apart from the farmers'/farms' characteristics, on some intrinsic characteristics of the farming decisions and that some very strategic decisions are either delegated or shared with several actors.
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Butler, Michelle Marie. "Place, memory and the ancient Costa Rican landscape: An exploration of footpaths, cemeteries and habitation sites." Diss., Connect to online resource, 2005. http://wwwlib.umi.com/cr/colorado/fullcit?p1430199.
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Chacón, Montes de Oca Paula. "Effect of Land Use, Climate and Soil Structure on Soil Organic Carbon in Costa Rican Ecoregions." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1252995403.
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Rojas-Herrera, Mariano. "Rivalry and the evolution of an industry's structure : the case of the Costa Rican banking system." Connect to resource, 1993. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1262789328.
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Howitt, Josephine B. "From Agriculture to Ecotourism: Socio-economic Change, Community Development and Environmental Sustainability in a Costa Rican Village." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23225.
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This research is an ethnographic case study of the emerging ecotourism economies in the agricultural village of San Gerardo de Rivas, Pérez Zeledón, Costa Rica. Due to the village’s location as the main entry point to climb the country’s tallest mountain within Chirripó National Park, the majority of households in San Gerardo now derive some income from tourism. I conducted twenty household surveys, followed by twenty-one semi-structured interviews with male and female heads of households and representatives of local organizations and tourism businesses. Drawing on local perspectives, I found that ecotourism was a complementary income source to agriculture and that men and women were engaging differently in ecotourism employment. Local organizations were involved in the participatory management of ecotourism activities within Chirripó National Park. Ecotourism has affected environmental practices and local people are strategically negotiating the direction of tourism development, including through using environmental discourses, to optimize the benefits to their community.
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Zarate, Montero Luis Hernán. "Social capital development: A case-based qualitative study on the internationalization process of Costa Rican knowledgeintensive SMEs." Doctoral thesis, Universitat Autònoma de Barcelona, 2017. http://hdl.handle.net/10803/402230.
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Esta tesis explora el desarrollo del capital social de las Pymes, y su influencia en el proceso de internacionalización; mediante la exploración de las dimensiones del capital social en la etapa pre-fundacional, preliminar a la internacionalización y la posterior a la internacionalización. En esta tesis se estudió la influencia de estas dimensiones del capital social desde una perspectiva individual y un perspectiva de la empresa, a través del análisis de múltiples niveles: estructural, relacional y dimensión cognitiva, lo que se traduce en una perspectiva más amplia del fenómeno. En consecuencia, el punto de vista adoptado del capital social es algo más amplio que el que brinda una la perspectiva de redes. Es decir, que incluye muchos aspectos de contexto social; tales como la interacción social, las relaciones sociales, relaciones de confianza, y los sistemas de valores.
Se llevaron a cabo siete estudios de caso cualitativos. El estudio de casos en profundidad de la industria del software Costa Rica se llevó a cabo durante el año 2013. Los datos describen los procesos de evolución de las dimensiones del capital social, durante el proceso de internacionalización de las empresas estudiadas. El análisis de las empresas estudiadas se realizó para cada caso individualmente y luego un análisis cruzado de los casos para explorar las similitudes y diferencias entre ellos. Se desarrolló un marco teórico sobre el desarrollo de las dimensiones del capital social de las empresas internacionales basado en la revisión de literatura y los hallazgos empíricos del estudio de casos.
Los resultados sugieren que las dimensiones del capital social son parte del proceso de evolución de las Pymes. A pesar de que las redes han sido relevantes en la investigación de desarrollo de capital social, los resultados también sugieren una mayor importancia en la construcción de la confianza dentro de las redes sociales de los empresarios en el proceso de internacionalización (incluso antes de la creación de la empresa). Los resultados se han centrado en las dimensiones cognitivas, relacionales y estructurales de capital social, que están presentes a nivel de empresa y a nivel individual. Los beneficios del capital social se asocian significativamente con la disponibilidad de los recursos de la red y, por lo tanto, requiere un comportamiento intencional utilización de contactos de la red para hacer disponibles esos recursos específicos. La subcontratación y utilización de contactos de la red se combinan para apoyar el desarrollo empresarial de las Pymes.<br>This dissertation explored the development of social capital dimensions of SMEs, and its influence on the internationalization process; by exploring social capital at pre-founding, venture creation, pre-internationalization and post-internationalization stages. This thesis studied the influence of social capital from individual and firm level, through multilevel analysis: structural, relational and cognitive dimension of social capital, which results in a wider perspective of the phenomenon. Consequently, the adopted view of social capital is more than just a network. That is, it includes many aspects of social context; such as social interaction, social ties, trusting relationships, and value systems.
Seven qualitative case studies were conducted. The in-depth case studies of Costa Rica software industry was carried out during 2013. The data describes the processes of evolution of social capital dimensions, during the internationalization process of cases firms. The case firms' analysis proceeded from single case analysis to cross-case analysis exploring similarities and differences across the cases. A theoretical framework for social capital development of international ventures was developed based on literature review and the case studies findings.
The findings suggest that the dimensions of social capital are part of the evolution process of SMEs. Although the networks have been relevant in social capital development research, the findings also suggest a greater importance in building trust within social networks of the entrepreneur on the internationalization process (even before the creation of the firm). The results have been focusing on cognitive, structural and relational dimensions of social capital, which are present at firm level and individual level. Social capital benefits are significantly associated with the availability of network resources and hence necessitates intentional networking behaviour to make those specific resources available. Outsourcing and networking are combined to support SME business development.
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Lerner, Moriah I. "An Analysis of Heavy Metals in Sediment and Water of Southwestern Costa Rican Watersheds Using ICP-MS." Scholarship @ Claremont, 2015. http://scholarship.claremont.edu/scripps_theses/569.
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Heavy metals can serve as a significant component of pollution in watersheds. In this study, ICP-MS analysis was used to determine the heavy metal content (Cd, Cr, Cu, Mn, Pb, and U) in water and sediment of three different Costa Rican watersheds: the Tarcoles River, the Terciopelo Creek, and the Cacao Creek. While the metal content of each the Terciopelo Creek and Cacao Creek was expected to be lower than that of the Tarcoles River, the results showed that this held true only for Cr and Pb. Elevated levels of the other four metals (Cd, Cu, Mn, and U) in the Terciopelo and Cacao Creeks are likely due to natural, lithogenic origin instead of anthropogenic input.
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Sanderson, Bellamy Angelina. "Costa Rican coffee and bananas : A social-ecological study of management practices and their effects on the environment." Doctoral thesis, Stockholms universitet, Systemekologiska institutionen, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-61221.
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This thesis investigates the variability in management practices on coffee and banana farms in an attempt to identify practices that reduce the environmental impact of export crop production. Different banana production systems are studied to determine their level of environmental impact. Insect sampling and bird surveys are used to assess the level of ecological quality on banana farms and their surrounding environments. The first two studies are based on interview methods and focus more on the social aspects of the production system. Paper I identifies how farmers utilize labor and herbicides in weed control practices, and found that small-scale coffee farmers overuse herbicides when their relative use of herbicides to labor to control weed densities is compared to their large-scale counterparts and small-scale organic producers. Paper II attempts to identify variability in management practices for the production of export bananas, but instead finds that there is only one type of export banana production system. However, there are lessons to be learned from organic and banana-coffee intercropping systems of production. Papers III-V use the information gathered in the interview studies of Paper II to give context to the results from analysis of ecological indicators collected from banana farms. Paper III is a comparison of insect community composition on high-input, low-input and organic banana farms. Paper IV is an analysis of aquatic macroinvertebrate in surface water sites upstream and downstream of banana farm canal entry points. Finally, Paper V is a comparison of ecological effects of management practices between Rainforest Alliance certified farms and non-RainforestAlliancecertified farms. Results showed that low-input banana production is not as good as organic production with regards to ecological impact, but it can still make a difference when compared to high-input banana production. Rainforest Alliance certified farms, however, are not low-input systems and the changes that they make in production practices are not enough to influence the quality of the ecological system. These results are encouraging for low-input production systems, but show that standards for Rainforest Alliance certification need to be tougher in order to make an impact on ecological indicators.<br>At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 2: Submitted. Paper 3: Submitted. Paper 4: Submitted. Paper 5: Manuscript.
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Esquivel, Patricia [Verfasser]. "Characterisation of Morphological and Chemical Traits of Costa Rican Fruits from Purple Pitaya (Hylocereus sp.) Genotypes / Patricia Esquivel." Aachen : Shaker, 2007. http://d-nb.info/1166511154/34.
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Kuprewicz, Erin Kathleen. "The Effects of Large Terrestrial Mammals on Seed Fates, Hoarding, and Seedling Survival in a Costa Rican Rain Forest." Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_dissertations/391.
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Terrestrial mammals affect numerous aspects of plant demography, colonization, and community structure in Neotropical forests. Granivorous mammals destroy seeds via seed predation and seedlings through herbivory, negatively affecting plant fitness. Mammals can also positively affect plants by dispersing or hoarding seeds. Seed fate outcomes are contingent on the interaction between mammal seed handling strategies and the intrinsic anti-predation defenses possessed by seeds. In field experiments at La Selva Biological Station, I investigated how collared peccaries (Pecari tajacu) and Central American agoutis (Dasyprocta punctata) affect five species of large seeds that have various defenses against predation. Overall, peccaries consumed and killed most non-defended and chemically-defended seeds but they could not destroy seeds with physical defenses. Agoutis killed non-defended and physically-defended seeds, but not seeds with chemical defenses. Using seeds of Mucuna holtonii, I investigated how chemical and structural defenses deter mammal and insect seed predation respectively. I also determined how endosperm removal by invertebrates affects seed germination and seedling biomass. Chemical defenses protected seeds from rodents, but not ungulates that digest seeds via pregastric fermentation. Physical defenses protected seeds from invertebrate seed predators, and removal of endosperm negatively affected both seed germination and seedling growth. To determine how scatter-hoarding by agoutis affects seed escape from seed predators, germination, and seedling growth, I created simulated agouti hoards. I also investigated how mammals affect young seedling survival. Hoarding enhanced seed survival, germination, and seedling growth for most species of seeds. Terrestrial mammals killed some seedlings via seed predation rather than by herbivory. Overall, large mammal activity in La Selva negatively affected seed and seedling survival and this likely influences many aspects of forest dynamics.
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Hayes, Allison Marie. "The understanding of motivations, preferences and constraints of recreation in a rural Costa Rican community la Zona de Monteverde /." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0003302.
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Roos, Lundström Frida, and Anna Mårtensson. "The Journey of Plastic trough Oceans : A study on quantifying micro plastic particles in ocean outside Costa Rican west coast." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-28822.
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Since 1950, the plastic production has increased radically from 1.5 to 280 million tons in 2012. The increased production of plastic has led to oceans becoming more polluted than ever. Micro plastic particles originate from large floating plastic debris by undergoing degradation caused by UV-radiation. Due to their small size, density and colour micro plastic particles resemble marine organisms’ natural prey and are therefore ingested. This report discuss the hypotheses that there are micro plastic particles present in oceans outside of the Costa Rican west coast (hypothesis 1), that the location between the South and North Pacific gyres will result in an accumulation of plastic (hypothesis 2) and that different sampling methods will generate different types of data which makes it difficult to compare results (hypothesis 3). A manta trawl was used to collect samples in size range 1-2mm and they were quantified with a microscope. To simplifying transportation and storing, aluminum foil was used instead of glass jars to collect samples. Thereby the need of transferring material from a glass jar to a flat surface for quantifying with microscope was eliminated. One area contained 56.5 % of all gathered particles together. The result also showed that micro plastic particles are present even in protected areas.
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Stjärnlöv, Liv. "The domestic is the elite : A quantitative content analysis on how news are valued in four national Costa Rican newspapers." Thesis, Linnéuniversitetet, Institutionen för medier och journalistik (MJ), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-48571.
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My study has questioned recognized factors of news valuation in the context of Costa Rican newspapers, with the aim at getting greater understanding in how news are valued in Costa Rican newspapers and what factors contribute to making an event the main article of an issue. My research therefore is a snapshot at how the news valuation process is conducted in Costa Rica at the moment. I furthermore went on to do a quantitative content analysis containing five theories of factors of news valuation, that I have theorised myself as a result of my research containing recognized factors of news valuation. The data has been selected through a random selection process, and then collected via the national library in San José, Costa Rica. I then went on to carry through a quantitative content analysis, containing 46 variables from recognized factors of news valuation and an additional five variables from my own theories, on the selected samples. The variables in my analysis to a great extent tried questioning the theories of Judy McGregor, Henk Prakke, Håkan Hvitfelt and Galtung and Ruge. The results show that some of the theories created by mentioned scholar do apply in the news valuation process in Costa Rican newspapers. It furthermore show that some factors, mentioned by the same scholar, to have great impact in the news valuation process does not at all impact the news value of an event in Costa Rican newspapers. This study shows that there is cultural and geographical differences in how events are valued as newsworthy or not, and that the factors that are acknowledged as determining of news value in one region or country, may in fact not at all apply in another part of the world. The results of my own theories show that there are differences in what factors that affect the news valuation process. My theories state that there are other factors that affect news values and that there can be opposing factors depending on in what country/region/journalistic area the news are valued.
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Axelsson, Anna-Karin, and Carolina Ekström. ""Nothing can be changed if the people don’t change" : Costa Rican registered nurses’ views and experiences of caring for patients with dengue fever." Thesis, Högskolan i Borås, Akademin för vård, arbetsliv och välfärd, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-452.
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Dengue fever has increased to the point where it has become a major international public health and economical problem, mainly in urban and semi-urban areas in tropical and subtropical regions. Worldwide 2,5 billion people live in regions where dengue can be transmitted and approximately 100 million people get infected yearly. In 2002 there was a great outbreak in Latin America, and Costa Rica was in the top three regarding reported cases. At the time of writing, reports show that cases of dengue are currently low in Costa Rica. Although the figures vary, dengue remains a public health problem. This study aimed to describe Costa Rican registered nurses’ views and experiences of caring for patients with dengue fever. Data were collected with semi-structured interviews and conducted with eight registered nurses from Costa Rica, and analysed with qualitative content analysis method with search for similarities and differences which later were categorized. The result was divided into five categories; the conception about dengue fever, caring, patient education, prevention and the future. The result showed a similar perception of the disease and was described as terrible, causing a lot of suffering for the patient, as well as a burden on the health care, that requires large financial resources. To control dengue and suppress the proliferation it is important to have different preventive means and to educate people to achieve a change of the mindset.
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Bell, Robert. "LIMÓN PATWA: A PERCEPTUAL STUDY TO MEASURE LANGUAGE ATTITUDES TOWARD SPEAKERS OF PATWA IN COSTA RICA." UKnowledge, 2019. https://uknowledge.uky.edu/ltt_etds/32.
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The primary purpose for this research is to examine and identify the social functions of Limón Patwa, a closely related language to Jamaican Patwa spoken by the Afro-Caribbean community of Costa Rica. There is a unique relationship regarding the language contact between Spanish and LP, where the maintenance of this English based language can certainly be complicated by a Spanish language dominant environment. Studying the historical migration of this Afro-Caribbean population to Costa Rica in the 1800s sheds light on the systemic oppression and the lack of integration into Costa Rican society that Afro-Costa Ricans faced in the midst of their arrival to Puerto Viejo (“the old port”). I conducted 8 sociolinguistic interviews with Limón Patwa speakers with efforts to better understand the usage of Limón Patwa, along with valuable information about being of African descent and living in Costa Rica. In addition to interviews with Patwa speakers, a matched guise audio survey was elicited to that involved listening to speakers of Patwa vs speakers of Spanish along with one audio recording of a Patwa speaker using Spanish. A Likert scale was used for participants to rate these voices as trustworthy, intelligent, and friendly, for example, in order to analyze how Patwa speakers are perceived by the general population. Furthermore, this research gives insight to where negative ideologies surrounding Limón Patwa and its speakers may stem from and how it influences the usage of LP. This study takes into consideration the issues of political power and the aspects of language identity, calling to attention the importance of efforts to maintain this minority language among an underrepresented community.
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Chaves, Gustavo Adolfo. "Tradición y ruptura en la poesía de Carlos de la Ossa." Amherst, Mass. : University of Massachusetts Amherst, 2009. http://scholarworks.umass.edu/theses/247/.
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Morales, Ramirez David. "Les formes de désignation de l'allocutaire dans l'espagnol du Costa Rica. Approche dialectologique, sociolinguistique et pragmatique." Thesis, Rennes 2, 2022. http://www.theses.fr/2022REN20017.
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Notre recherche nous a mené au constat selon lequel les formes de désignation de l’allocutaire en espagnol costaricien sont dans une lutte constante entre standardisation et changement linguistique, ainsi qu’entre norme et variation. Par exemple, l’approche diachronique (chapitre 1) nous a permis de conclure que le pronom usted a toujours été lié à une analyse explicative et descriptive. Lors de l’analyse de la catégorie fonctionnelle et structurelle de ce pronom, les études tendent à l’objectivité et à la neutralité. Vos et tú ont quant à eux fait l’objet d’une lutte entre prescriptivisme et descriptivisme. Dans le chapitre 2, centré sur les attitudes, perceptions et jugements linguistiques afférents aux formes de désignation de l’allocutaire dans l’espagnol du Costa Rica, les informateurs attribuent à usted diverses estimations positives. Les enquêtés s’attachent surtout à préciser comment ils utilisent le pronom usted pour affirmer leurs positionnements et actes identitaires. En revanche, pour ces mêmes informateurs, différents stéréotypes continuent de circuler autour de vos et de tú. Dans les chapitres suivantes (3 et 4), et plus précisément concernant la langue écrite, les journaux, en tant que médias de masse, penchent plus pour tú dans le contexte d’usage d’une modalité standardisée. En revanche, dans la langue parlée, concernant la publicité orale, le Costa Rica suit actuellement sa propre norme linguistique. Vos, surtout, et usted, dans une certaine mesure, sont les outils d’expression des médias de masse. De même, hors de l’espace publicitaire, tú est le pronom normatif de l’écriture électronique (chapitre 5). En somme, les statuts des pronoms diffèrent autant que les normes. Par exemple, au niveau diachronique et perceptif, le point de repère pour l’usage est usted. En revanche, pour la publicité orale, il s’agit de vos, et pour la publicité écrite et l’écriture électronique, de tú. Cette optique vient confirmer de nouveau la complexité inhérente aux formes de désignation de l’allocutaire dans l’espagnol du Costa Rica, car celle-ci oscille entre différentes normes en fonction du registre<br>In our research we have found that the Pronouns of address in Costa Rican Spanish are in a constant struggle between standardization and linguistic change, as well as between the norm and variation. For example, in chapter 1 of the thesis, regarding the diachronic approach, we can conclude that the pronoun usted has always been linked to an explanatory and descriptive analysis in Costa Rican Spanish. The studies point out that there is objectivity and neutrality when analyzing the functional and structural categorization of the pronoun. Meanwhile, vos and tú have been the object of a struggle between the prescriptive and the descriptive. In relation to chapter 2, regarding the chapter on attitudes, perceptions and linguistic evaluations concerning the Pronouns of address in Costa Rican Spanish, informants assign different positive evaluations to usted. Respondents focus mostly on clarifying how they use usted to mark positioning and acts of identity. On the other hand, for the same informants, different stereotypes continue to circulate around vos and tú. In the following chapters (3 and 4), in terms of the written language, newspapers as mass media are opting more for tú as part of the use of a standardized modality. On the other hand, in the spoken language, in terms of oral advertising both on television and radio, Costa Rica is following its own linguistic norm. The vos above all and the usted in a certain way are the instruments of expression of the mass media. Likewise, outside the advertising space, tú is the normative pronoun in electronic writing (chapter 5). In summary, there are different statuses of pronouns because the rules are different. For example, at the diacritical and perceptual level usted is the point of reference in usage. While in oral advertising it is vos and in written advertising and electronic writing it is tú. From this perspective, we can confirm, once again, the complexity concerning the Pronouns of address in Costa Rican Spanish, since it moves between different regulations depending on the register
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Chaverri, Iván Anselmo Acuña. "Poder e conflito na estrutura organizacional do Partido Liberación Nacional da Costa Rica : 1990 a 2010." Universidade Federal de São Carlos, 2013. https://repositorio.ufscar.br/handle/ufscar/1011.
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Previous issue date: 2013-04-24<br>Universidade Federal de Sao Carlos<br>The project aims to investigate the distribution of power, their reproduction and their implications in the organization of the National Liberation Party (PLN) in Costa Rica, during the period 1990-2010. In a context characterized by changes in the party system and the electoral system in Costa Rica, the PLN was affected by deep divisions, motivated by personal and ideological interests. The intraparty struggle for control of the lines of authority meant a challenge to the power structure and the party's electoral aspirations. In front of the crisis, the dominant coalition that takes control of the party manages to reverse the situation, making to adapt the party to environmental conditions by controlling areas of uncertainty, and co-opting groups that confronted the intraparty fight. Strengthening the party organization, the dominant coalition succeeded to secure their survival and organizational stability.<br>O projeto tem como objetivo investigar a distribuição do poder, sua reprodução e as implicações destas na organização do Partido Liberación Nacional (PLN) da Costa Rica, durante o período 1990-2010. Em um contexto marcado por mudanças no sistema partidário e no sistema eleitoral costarriquenho, o PLN foi afetado por divisões profundas, motivadas por interesses pessoais e ideológicos. A luta intrapartidária pelo controle das linhas de autoridade significou um desafio para a estrutura de poder e para as aspirações eleitorais do partido. Em frente da crise, a coalizão dominante que toma o controle do partido consegue reverter a situação, conseguindo adaptar o partido às condições ambientais, controlando as zonas de incerteza, e cooptando os grupos que confrontou na luta intrapartidária. Fortalecendo a organização partidária, a coalizão dominante conseguiu garantir sua sobrevivência e estabilidade organizativa.
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Schweiggert, Ralf Martin [Verfasser]. "Characterisation of morphological and chemical traits of Costa Rican papaya (Carica papaya L.) fruit genotypes with special reference to their carotenoid bioavailability / Ralf Martin Schweiggert." Aachen : Shaker, 2014. http://d-nb.info/1049380339/34.
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Fonseca, Malavasi Marisol. "El agua cántara: incursiones de la belleza." Thesis, University of Iowa, 2014. http://ir.uiowa.edu/etd/4630.
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El agua cántara es una historiografía apócrifa de la literatura. Esta compilación incluye versiones paródicas del realismo, el romanticismo, el costumbrismo y el posthumanismo, entre otros discursos, géneros y movimientos (los cuales, desde la óptica del absurdo, bien pueden ser una misma cosa). Además de realizar un recorrido por algunas de las principales formas textuales de Occidente, esta antología elabora y rastrea su propio mito de origen de la literatura: el sonido como máximo valor estético.
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Rains, Kai Coshow. "Ericoid mycorrhizas in organic substrates : distribution of ericoid mycorrhizas among epiphytes in a Costa Rican cloud forest and uptake of organic nitrogen by ericoid, ecto-, and arbuscular mycorrhizal pygmy forest plants /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.
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Irías-Mata, Andrea Paola [Verfasser], and Jan [Akademischer Betreuer] Frank. "Tocotrienols, tocopherols and tocomonoenols : characterization in Costa Rican palm oils, and intracellular and tissue distribution as a function of the hepatic alpha-tocopherol transfer protein / Andrea Paola Irías-Mata ; Betreuer: Jan Frank." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2019. http://d-nb.info/1182423574/34.
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