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 20 of 558 for “"Pollen"”.
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Classification of large pollen datasets using neural networks with application to mapping and modelling pollen data
This thesis concerns the usage of large pollen databases and their application to mapping and modelling past vegetation. Maps of past taxon distributions are generated and classification techniques are used to compile maps of past woodland types. These visualisations of pollen data have …
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Cave pollen taphonomy in Kurdish Iraq
… aims to understand the mechanisms involved in pollen transport and deposition in cave environments and the influence of different factors on the composition of the pollen assemblage, with special reference to the problem of the Neanderthal ‘Flower burial’ at Shanidar Cave, Kurdish Iraq. Limited …
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THE IMPLICATIONS OF ATMOSPHERIC POLLEN RAIN FOR FOSSIL POLLEN PROFILES IN THE ARID SOUTHWEST (AEROBIOLOGY, PALAEOBOTANY, TAPHONOMY, PRESERVATION).
I compared atmospheric and soil pollen values to determine taphonomic influences on pollen in Southwestern soils. Burkard traps sampled atmospheric pollen for six years from multiple sites in Tucson, Arizona. Tauber and soil samples were collected for two years at Tumamoc Hill (Tucson). Morus, …
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Pollen allergy in the Icelandic urban landscape
Since years the global number of pollen allergy sufferers keeps rising. A trend connected and influenced by several factors such as pollution, man-made monodominant planting communities and reduced biodiversity, mainly seen in the urban landscape. For city dwellers urban green spaces are essential …
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Pollen and pollinosis: medical and botanical aspects
Contains fulltext : mmubn000001_128960930.pdf (Publisher’s version ) (Open Access)
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Allergenic pollen concentrations in the United Kingdom
… in the start and severity of the grass and birch pollen seasons at a network of sites in the United Kingdom. Daily grass and birch pollen concentrations have been monitored during the course of the study (1992-1994) at the University of North London site. Retrospective pollen data of up to 30 …
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Pollen study in Castanea dentata and C. mollissima
… the direction and distance of C. dentata pollen dispersal. The study of C. dentata pollen dispersal patterns was set up at an isolated orchard in Cleveland, Tennessee. Pollen collectors were placed at 13 locations in an array 15.2, 30.4, 46 and 61 meters north, northeast and east from the …
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Late Paleozoic Bisaccate Pollen From the Midcontinent Area
Made available in DSpace on 2014-12-04T19:13:56Z (GMT). No. of bitstreams: 1 6003992.pdf: 4204603 bytes, checksum: 03bcd6eaeff51172904bed9ded345bbb (MD5) Previous issue date: 1960
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Open-world deep learning applied to pollen detection
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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'Insidious Pollen': Literature and Industrial Toxicity, 1935-Present
This dissertation tracks the entwined cultural and environmental histories of ‘legacy contaminants – enduring poisons from the past’. It focuses chiefly on literary texts about industrial toxicity written in Britain, or in response to British imperial projects, from 1935-present. Critically, it …
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Modern Pollen-Vegetation Relationships In Ghana, Tropical West Africa
Understanding the pollen assemblages produced by modern tropical vegetation, and improving the taxonomic resolution of pollen identification are vital in generating high quality interpretations of fossil pollen assemblages. Lake Bosumtwi, Ghana, is a 1 million year old meteorite impact crater-lake, …
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Springtime asthma hospitalizations and pollen levels: Are they related?
… 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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The higher fatty acids of pollen of Zea mays
Thesis (M.S.)--Michigan State University of Agriculture and Applied Science. Dept. of Chemistry, 1957
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Pollinator Movement and Pollen Transfer in Hybrid Seed Canola
… of hybrid seed canola requires the transfer of pollen from hermaphroditic (‘male’) to male-sterile (‘female’) plants, facilitated by managed pollinators (honey and leafcutter bees) and wild pollinators. I assessed pollinators in fields of hybrid seed canola located in Southern Alberta to …
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