Life Sciences Commons^™

Cellulase Activities Of Soil Fungi, Jacobo Ortega

Biology Faculty Publications and Presentations

The cellulase activities of 8 isolates of fungi obtained from agricultural soils of Hidalgo County, TX were investigated by measuring the changes in the viscosity of a buffered solution of carboxymethylcellulose (CMC), produced by the fluids obtained from liquid cultures of these isolates. The change in the viscosity of the reaction mixture incubated at constant temperature (30 C) was measured with Cannon-Fenske routine viscometers. A buffered cellulase solution was used as a control.

Due to the variability that existed among the isolates investigated, it was possible to select active producers of cellulase with the method followed in this investigation. The …

Annotated Checklist Of The Flowering Plants Of South Padre Island, Texas, Robert I. Lonard, Frank W. Judd, Sammie L. Sides

Biology Faculty Publications and Presentations

This study catalogues the flowering plants of South Padre Island, Texas. A total of 207 species in 47 families is listed. The abundance and ecological distribution of each taxon are noted. Comparisons are made with the flora of Mustang Island, Texas. Ninety-three species, 96 genera and 36 families are common to both islands. Three families, Compositae, Gramineae and Leguminosae, contain large shares of the total number of species on both islands. Apparently, much of the floral diversity is due to the presence of a large number of species that are represented by small populations.

Reinstatement Of The Genus Tiquilia (Boraginaceae: Ehretioideae) And Descriptions Of Four New Species, Alfred Richardson

Biology Faculty Publications and Presentations

No abstract provided.

Coastal Vegetational Communities Of The Two Texas Barrier Islands, Boca Chica And Brazos, Baltazar Cisneros

Theses and Dissertations - UTB/UTPA

Two Texas barrier islands, Boca Chica and Brazos, have unique coastal vegetational communities that may be Influenced by several environmental factors. These environmental factors include temperature, precipitation, wind speed, sunshine exposure, day length, and dune height. The purpose of this investigation was to determine the total number of coastal plant species per station, season, and year and to consider environmental factors that may significantly affect the number and pattern of coastal species. Coverage comparison between aerial and land sampling and aerial vegetational zonation was also considered.

Results indicated the presence of 21 angiosperm families and a total of 54 species. …

Seasonal Periodicity Of Dominant, Benthic, Marine Macroalgae Of The North Jetty Of Brazos Santiago Pass, Texas, As Related To Environmental Factors, Gary J. Penn

Theses and Dissertations - UTB/UTPA

The seasonality of marine algae may be influenced by a large number of factors. These factors Include water clarity, water temperature, dissolved oxygen, conductivity, salinity, light Intensity, precipitation, air temperature, water turbulence, and daylength. The purpose of this study was to determine seasonal patterns and the effect of these variables on the algae.

The results Indicate that 24 dominant, benthic, genera of algae have two seasonal populations. A winter-spring population Includes algae in abundance between January and May. A fall population includes algae in abundance during September, October and November, Results of environmental studies indicate day-length dominant factors in algal …

Recommended Vegetable Varieties For The Lower Rio Grande Valley Of Texas, J. B. Corns

Biology Faculty Publications and Presentations

No abstract provided.