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Research Study for Hanna Park Book I
No full textPhotograph
20 x 24
Gift of the Artisthttps://digitalcommons.unf.edu/library_art/1073/thumbnail.jp
Send Me No Flowers
No full textMixed media on mat board
8 x 7 1/4
Gift of Pat Vailhttps://digitalcommons.unf.edu/library_art/1075/thumbnail.jp
Development of erosion functions for MICP-treated beach sand
Get PDFThis thesis investigates the effectiveness of microbially-induced calcium carbonate precipitation (MICP) using the recently introduced bioslurry treatment method via surface percolation. To simulate realistic water forcing conditions, a piston-style erosion rate testing apparatus, specifically the Florida Department of Transportation Sediment Erosion Rate Flume, was used. Initial tests conducted at a high shear stress of 42 Pa revealed that a combination of 15% bioslurry and 85% cementation solution exhibited the strongest erosion resistance when compared to other ratios between bioslurry and cementation solution. Subsequent experiments focused on separating the specimen into a loose part and a “surface crust,” with shear stresses applied to assess erosion rate and critical shear stress of each of these specimen subsections. Results showed that MICP treatment increased the critical shear stress slightly in the “loose” subsections., while the “crust” subsections exhibited as much as 7 times higher critical shear stresses compared to untreated specimens. These findings suggest that MICP treatment holds promise in bolstering the erosion resistance of coastal environments
Endophytic fungi associated with galls and host plants of Asphondylia borrichiae (Diptera: Cecidomyiidae)
Get PDFAsphondylia borrichiae, like other gall-forming gnats, are obligate symbionts to the endophytic fungi (EF) they deposit when laying eggs. Asphondylia spp. and EF are important biocontrol agents, yet details surrounding their diversity, life cycles, and host interactions remain poorly understood. Galls and leaf-stem tissues from two host plants were surveyed to identify and compare EF diversity between the host tissues and species of A. borrichiae. Identification of 114 isolates was carried out by sequencing the internal transcribed spacer (ITS 1/4 primers). Pairwise alignments in multiple genetic databases were bolstered by phylogenetic analyses using maximum parsimony and maximum likelihood for bootstrapping support. A total of 21 genera were identified. The most prominent genus was Fusarium, particularly those within the Fusarium incarnatum-equiseti species complex (FIESC). Galls included species previously documented in A. borrichiae galls: Botryosphaeria dothidea, Cladosporium spp., and Alternaria alternata. Several genera were isolated that have not been previously identified in A. borrichiae galls: Clonostachys rosea, Sarocladium sp., Daldinia sp., Nigrospora spp., Hypoxylon sp., Epicoccum sp., Curvularia sp., Trichoderma sp., Pestalotiopsis sp., and Phlebiopsis sp. Diversity index values of EF communities between B. frutescens and I. frutescens galls were significantly different, with greater diversity observed in B. frutescens galls. Similarities of EF isolates between host plant and gall tissues support the potential horizontal transmission of fungi into plant tissues following midge eclosion. These results suggest EF gall diversity is associated with the relationship between midges and the host species, implying EF can use A. borrichiae and host plants as vectors. Asphondylia spp. are known crop pests and inhabitants of declining ecosystems affected by climate change, while EF are dense sources of unique metabolites. Elucidating the ecology and EF diversity of multi-trophic systems can aid in understanding host-range expansion in phytophagous insects as well as potential applications biomedicine, restoration, and biocontrol
Financial Reports and Assorted Papers of the League
Get PDFDocuments: Reports and assorted papers of the National Negro Welfare League, including National Negro Welfare League stationery and papers regarding job placement and the Milk Fund Committee. Undated
Santa Fe
No full textAcrylic on Canvas
36 x 48
Gift of the Artisthttps://digitalcommons.unf.edu/library_art/1116/thumbnail.jp
Home Office: Afro-American Life Insurance Co. Postcard
Get PDFPostcard: Street view of the Afro-American Life Insurance Company home office, Jacksonville, Florida. Handwritten notations on back. Undated
Cardinal on Branch
No full textLithograph
30 x 24
Gift of Blair Woolvertonhttps://digitalcommons.unf.edu/library_art/1053/thumbnail.jp
Cypress Blue
No full textPastel on paper
Gift of the Artist
30 x 20 incheshttps://digitalcommons.unf.edu/library_art/1109/thumbnail.jp