Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"grass pollen"”.
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Evolution and ecology of C4 grasses: insights from carbon isotope analysis of grass pollen grains
C4 grasses account for >25% of global primary productivity and dominate tropical, subtropical, and warm-temperate grassland ecosystems. Because of limitations of conventional morphological and geochemical proxies, identification of C4 grasses in the fossil record is difficult. Thus, testing …
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Identification and characterisation of HLA-DRB1*0101 restricted CD4+ T cell epitopes in the major grass pollen allergens Phl p 1 and Phl p 5
… rhinitis. The majority have symptoms caused by grass pollen exposure. Phl p 1 and Phl p 5 are the major grass pollen allergens in Timothy grass (Phleum pratense). Specific grass pollen immunotherapy using whole extract is an effective disease-modifying treatment, but it is associated with …
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Influence of Aridity and Fire on Holocene Vegetational Patterns in the Tallgrass Prairie Peninsula
… techniques are needed to understand C 3 and C4 grass fluctuations. A method of isolating fossil grass pollen for delta13C analysis was developed, and the delta 13C composition of modern and fossil grass pollen was evaluated. Results suggest that modern pollen from C3 and C4 grass species can be …
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Modification by sex and atopy of the effect of chemical air pollutions and biological air pollutants including pollen and fungal spores on children respiratory health in the Western Cape, Cape South Africa
… homes using a land-use regression model, while pollen and fungal spores were measured using spore traps positioned in each study area during the follow-up study between May 2016 and September 2016. Asthma-related outcomes were obtained using the International Study of Allergy and Asthma in …
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Springtime asthma hospitalizations and pollen levels: Are they related?
… if asthma morbidity was associated with tree and grass pollen levels. Pollutants and weather factors were also analyzed because they may have confounded the association between asthma and pollen, or may have had their effect modified by pollen. Daily and weekly asthma admissions were associated …
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Cytokines and aeroallergens in the pathogenesis of summer-pasture associated obstructive pulmonary disease: effects on endothelin production, neutrophil activation and chemotaxis
… hot and humid conditions and with increases in grass pollen and mold spore counts. Circulating concentrations of ET-1 were increased during clinical exacerbation of SPAOPD compared with remission and controls. Gene expression of ET-1 and cytokines, interleukin (IL)-8 and IL-4, but not interferon …
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The Voice of the Patient
… Swedish and validated it for children with a grass pollen allergy. The second instrument is a novel tool for asthma assessment in primary care developed with the goal of structuring asthma review in primary care. The result showed that it can be useful for assessing asthma control as well. The …
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Metabarcoding pollen to identify allergenic species of grasses (Poaceae) and ragweed (Ambrosia spp.) across six monitored sites in South Africa
… such as rhinitis, conjunctivitis, and asthma. Pollen is the second most important contributor, and despite cross-reactivity between allergens, patients often experience distinct sensitivity patterns to different species. The occurrence of allergenic species varies with geography, seasonality, …
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Metabarcoding pollen to identify allergenic species of grasses (Poaceae) and ragweed (Ambrosia spp.) across six monitored sites in South Africa
… such as rhinitis, conjunctivitis, and asthma. Pollen is the second most important contributor, and despite cross-reactivity between allergens, patients often experience distinct sensitivity patterns to different species. The occurrence of allergenic species varies with geography, seasonality, …
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Allergen specific immunoglobulins during pregnancy.
… IgG4 (total and allergen specific taking Timothy grass pollen as the model allergen) have been investigated prospectively during and after pregnancy in healthy women and women suffering from allergic rhinitis. The results show that the total serum IgG concentration remained unchanged in both …
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Studies investigating peripheral blood derived cells that express the high affinity receptor for immunoglobulin E (Fc?RI) In Allergic Disorders
… and IgE) in subjects who, after 3 to 4 years of grass pollen immunotherapy, had continued on either active or placebo immunotherapy for a further 3 years. A historical perspective explaining some of the reasons the studies were done is provided in the introductory chapter whilst the discussion …
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Studies investigating peripherial blood derived cells that express the high affinity receptor for immunoglobulin E (FceRI) in allergic disorders
… and IgE) in subjects who, after 3 to 4 years of grass pollen immunotherapy, had continued on either active or placebo immunotherapy for a further 3 years.<br/>A historical perspective explaining some of the reasons the studies were done is provided in the introductory chapter whilst the …
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A pollen analytical investigation of Holocene palaeoenvironments at Lake Tyrrell, semi-arid Northwestern Victoria, Australia
This thesis presents a pollen analytical reconstruction of mallee vegetation history in the vicinity of Lake Tyrrell, a large active salt lake in semi-arid northwestern Victoria. The project combined studies of the modern pollen rain, pollen depositional processes and sedimentological …
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A pollen analytical investigation of Holocene palaeoenvironments at Lake Tyrrell, semi-arid Northwestern Victoria, Australia
This thesis presents a pollen analytical reconstruction of mallee vegetation history in the vicinity of Lake Tyrrell, a large active salt lake in semi-arid northwestern Victoria. The project combined studies of the modern pollen rain, pollen depositional processes and sedimentological …