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Articles 1591 - 1620 of 1819
Full-Text Articles in Life Sciences
The Biological Flora Of Coastal Dunes And Wetlands. Sesuvium Portulacastrum (L.) L., Robert I. Lonard, Frank W. Judd
The Biological Flora Of Coastal Dunes And Wetlands. Sesuvium Portulacastrum (L.) L., Robert I. Lonard, Frank W. Judd
School of Integrative Biological & Chemical Sciences (Formerly Dept. of Biology)
Sesuvium portulacastrum (L.) L. (sea purslane, cenicilla) is a pantropical, perennial, trailing herb (Aizoaceae) with pink-purple or occasionally white flowers that grows on coastal beaches of five continents and many islands. Herein we present a review of the biology of S. portulacastrum. It is an important pioneer species on sandy beaches in the subtropics and tropics, where its stoloniferous, mat-forming growth habit promotes embryonic dune formation in belts parallel to the shoreline. Colonies act as barriers to intercept and hold water and wind transported sand. Sesuvium portulacastrum's success as a colonizing species is related, in large part, to its …
Using The Spot-Mapping Censusing Technique To Assess Changes In Breeding Bird Communities At Santa Ana National Wildlife Refuge, Alamo, Texas, 1940-1996, Alberto Cantu
Theses and Dissertations - UTB/UTPA
Results of breeding-bird censuses done by Davis in 1940 and by Gehlbach between 1973-1978 at Santa Ana National Wildlife, Alamo Texas, were compared to a 1995-1996 bird survey done in Gehlbach's study area. According to the Wilcoxon rank-sum test, bird densities in 1940 and 1995-1996 were similar, while 1973-1978 densities were lower. The 1995-1996 bird community was 76% similar to both the earlier studies. However, the communities studied in 1940 and 1973-1978 had only a 60% similarity. Negligible differences in bird densities and species composition were found between the 1995 and 1996 communities. Differences are attributed to changes in vegetation …
A Comparison Of Secondary Successional Woody Vegetation In Two Revegetated Fields In South Texas And An Assessment Of Habitat Use By The Olive Sparrow, Arremonops Rufivirgatus, Patrick Grant Wright
A Comparison Of Secondary Successional Woody Vegetation In Two Revegetated Fields In South Texas And An Assessment Of Habitat Use By The Olive Sparrow, Arremonops Rufivirgatus, Patrick Grant Wright
Theses and Dissertations - UTB/UTPA
Aspects of plant species composition and structure of two revegetated fields in western Cameron County, Texas, were studied between 1992 and 1995. Avian habitat suitability was assessed using the Olive Sparrow, Arremonops rufivirgatus, as an indicator species. Total vegetation volume at the Longoria Wildlife Management Area (WMA), an area revegetated in 1961, was 0.745 $\rm m\sp3V/m\sp2$ and that of the Anacua WMA, revegetated in 1983-4, was 0.546 $\rm m\sp3V/m\sp2$ in 1992. Secondary woody species at the Longoria and Anacua WMA's had a Shannon's index of diversity of 0.619 and 0.264, respectively. Secondary woody vegetation at the Longoria WMA had a …
Red-Breasted Mergansers, Mergus Serrator, Nesting In Southern Texas, Jeffery R. Rupert, Timothy Brush
Red-Breasted Mergansers, Mergus Serrator, Nesting In Southern Texas, Jeffery R. Rupert, Timothy Brush
School of Integrative Biological & Chemical Sciences (Formerly Dept. of Biology)
No abstract provided.
Agriculture News Release - 1996-03-29, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1996-03-29, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Feeding And Nesting Ecology Of The Great Kiskadee, Pitangus Sulphuratus Texanus (Passeriformes: Tyrannidae) In The Lower Rio Grande Valley, Texas, Robert Luis Gorena
Feeding And Nesting Ecology Of The Great Kiskadee, Pitangus Sulphuratus Texanus (Passeriformes: Tyrannidae) In The Lower Rio Grande Valley, Texas, Robert Luis Gorena
Theses and Dissertations - UTB/UTPA
The foraging and nesting ecology of the Great Kiskadee was studied in the Lower Rio Grande Valley, Texas during 1994 and 1995. Adult kiskadees were found to be omnivorous, feeding mainly on fleshy fruits, fish, and dragonflies, and capturing animal prey mainly by surface gleaning into water or hawking prey out of midair. Nests are constructed mainly during March and April and are built at heights between 6 and 10 meters apparently without preference to tree species. Of 29 nests observed, 66% (19) were active during at least part of the breeding season. Nestlings are fed a diet very similar …
Effect Of Myristicin, A Constituent Of Parsley, On Levels Of Glutathione And Glutathione S-Transferase In Mice Tissues, Maria Theresa Tijerina
Effect Of Myristicin, A Constituent Of Parsley, On Levels Of Glutathione And Glutathione S-Transferase In Mice Tissues, Maria Theresa Tijerina
Theses and Dissertations - UTB/UTPA
Glutathione (GSH) and related enzymes interact as a ubiquitous and efficient detoxification system in biological organisms. Several naturally occurring, as well as synthetic compounds, are known to increase the levels of glutathione/glutathione S-transferases (GST). One of the natural compounds includes myristicin, which is a constituent of parsley leaf oil as well as other natural foods. The extent to which the levels of the GSH/GST system can be induced appears to be dependent on the specific tissue type and the amount of myristicin administered. Our results show that increased amounts of myristicin exhibited beneficial effects within a certain range for each …
Cell Wall Degrading Enzymes Produced By The Phytopathogenic Fungus Phymatotrichum Omnivorum, Jacobo Ortega
Cell Wall Degrading Enzymes Produced By The Phytopathogenic Fungus Phymatotrichum Omnivorum, Jacobo Ortega
School of Integrative Biological & Chemical Sciences (Formerly Dept. of Biology)
The extracellular plant cell wall degrading enzymes of Phymatotrichum omnivorum and the effect of different carbon sources on the production of these enzymes were investigated. Cellobiohydrolase, endoglucanase and xylanase activities were detected in fluids collected from cultures containing sodium carboxymethyl cellulose (CMC) or xylan as carbon sources and enzyme inducers. The highest activities of cellobiohydrolase and xylanase were measured in fluids collected from cultures containing xylan. Results of this study indicate that P. omnivorum constitutively produces small amounts of endoglucanase.
Abundance And Diversity Of Aquatic Birds On Two South Texas Oxbow Lakes., Diane Teter, David L. Mcneely
Abundance And Diversity Of Aquatic Birds On Two South Texas Oxbow Lakes., Diane Teter, David L. Mcneely
School of Integrative Biological & Chemical Sciences (Formerly Dept. of Biology)
Avian use of two oxbow lakes located in urban surroundings of south Texas was studied for one year. Both abundance and diversity of aquatic birds were notably reduced in the more intensely developed area. Possible factors resulting in these differences are reviewed.
Agriculture News Release - 1994-12-15, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-12-15, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-12-08a, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-12-08a, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-12-08b, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-12-08b, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-12-06, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-12-06, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-12-02, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-12-02, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-11-30, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-11-30, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-10-05b, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-10-05b, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-10-05a, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-10-05a, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-10-03b, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-10-03b, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-10-03c, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-10-03c, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-10-03a, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-10-03a, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-09-30, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-09-30, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-09-29, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-09-29, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-09-28c, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-09-28c, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-09-28a, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-09-28a, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-09-28b, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-09-28b, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-09-27b, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-09-27b, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-09-27a, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-09-27a, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-09-22, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-09-22, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-08-24, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-08-24, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.
Agriculture News Release - 1994-08-12b, United States. Congress. House. Committee On Agriculture, E. De La Garza
Agriculture News Release - 1994-08-12b, United States. Congress. House. Committee On Agriculture, E. De La Garza
Kika de la Garza Congressional Papers - Agriculture Committee News Releases
No abstract provided.