Life Sciences Commons^™

Waas, Glonass, And Gps Accuracy, Yanli Zhang, Daniel Unger, I-Kuai Hung, David Kulhavy

Faculty Publications

No abstract provided.

Evaluating Gps Effectiveness For Natural Resource Professionals: Integrating Undergraduate Students In The Decision-Making Process, Daniel Unger, I-Kuai Hung, Yanli Zhang, David Kulhavy

Faculty Publications

Undergraduate students pursuing a Bachelor of Science in Forestry (BSF) degree at Stephen F. Austin State University (SFA) attend an intensive 6-week residential hands-on instruction in applied field methods. For students pursuing the BSF degree knowing the exact location of a forestland is crucial to the understanding and proper management of any related natural resource. The intensive 6-week instruction includes teaching how to use the Global Positioning System (GPS) to accurately record the spatial location of an earth’s surface feature. After receiving hands-on instructions during the summer of 2014, students were taken to the field to collect real-world locations. Students …

Bullish On Forestry Careers, Steven H. Bullard, Thomas J. Straka

Faculty Publications

During the next decade, baby boomer-aged foresters, those born from 1946 to 1964, will be retiring in large numbers. This retirement trend is true for all sectors of forestry employment, from state and federal agencies to private firms and industries.

Forestry employers in both public and private sectors are clamoring for more graduates, as well as for more diverse graduates, from forestry degree programs. With looming retirements and industry growth, employers can project the number of positions opening, and they are aware that U.S. forestry schools are not producing sufficient graduates to fill the positions.

A Test Of The Mean Distance Method For Forest Regeneration Assessment, Daniel Unger, Jeremy P. Stovall, Brian P. Oswald, David Kulhavy, I-Kuai Hung

Faculty Publications

A new distance-based estimator for forest regeneration assessment, the mean distance method, was developed by combining ideas and techniques from the wandering quarter method, T-square sampling and the random pairs method. The performance of the mean distance method was compared to conventional 4.05 square meter plot sampling through simulation analysis on 405 square meter blocks of a field surveyed clumped distribution and a computer generated random distribution at different levels of density of 100, 50 and 25%. The mean distance method accurately estimated density on the random populations but the mean distance method estimates were more variable than those of …

The Effects Of Sugar Consumption And Race On Satisfaction With Body Size And Weight, Diego Rubalcava

Undergraduate Research Conference

No abstract provided.

High Level Protein Expression Slows Down Rate Of Growth Of Bacterial Broth Cultures, Saad Chaudhry, Kenechukwu Ekwemalor, Shobhit Keswani, Odutayo Odunuge

Undergraduate Research Conference

No abstract provided.

Comparison Of The Performance Of A Digital Image Analysis Method Versus A Leaf Area Meter In Measuring Leaf Surface Area, Elaine Harris

Undergraduate Research Conference

No abstract provided.

Obesity In The United States, Kimberly Greenlee, Larry Pilgrim

Undergraduate Research Conference

No abstract provided.

Determination Of Anions In Lanana Creek By Ion Chromatography, Tania Benavides

Undergraduate Research Conference

Abstract

Lanana Creek is one of two springs that surround Nacogdoches, TX. Lanana Creek starts southwest of Lake Naconiche, conjoining with several other bodies of water along its path, and becomes part of the Angelina River. This body of water eventually ends in the Gulf of Mexico which may contribute to the dead zone. Contaminants in water may be of small concentration; however, prolonged exposure could produce many negative effects. To prevent further contamination, the source of the contamination must be identified through testing the water for contaminants. Some possible sources of contamination may be from fertilizers and pesticides used …

Health-Related Fitness Results From Fitness Gram Tests, David Goodman, Candyce Young

Undergraduate Research Conference

No abstract provided.

Recipe Makeover: Finding Flavorful Healthy Alternatives For Traditional Foods, Rebecca Blubaugh

Undergraduate Research Conference

No abstract provided.

Accuracy Assessment Of Land Cover Maps Of Forests Within An Urban And Rural Environment, Daniel Unger, I-Kuai Hung, David L. Kulhavy

Faculty Publications

Land cover maps of forests within an urban and rural environment derived from high spatial resolution multispectral data (QuickBird) and medium spatial resolution multispectral data (Landsat ETM+ and SPOJ 4) were compared to ascertain whether increased spatial resolution increases map accuracy of forests and whether map accuracy varies across land cover classification schemes. It is commonly assumed that increased spatial resolution would probably increase land cover map accuracy regardless of land cover classification methodology. This study assessed whether that assumption is correct within a rural and an urban environment. Map accuracy for modified National Land Cover Data (NLCD) 2001 Level …

Project Report No. 69, Observed Growth And Yield Of Loblolly And Slash Pine Plantations In East Texas, Dean W. Coble, Katherine Pendergast

Informal Project Reports

Forestland in East Texas is an estimated 12.1 million acres, with approximately 2.9 million acres (24%) classified as pine plantations on private land. Because pine plantations are typically managed for timber production, information regarding tree growth is needed to make informed management decisions. An understanding of how growth factors such as tree volume, diameter, height and basal area are affected by site index, trees per acre and age in East Texas enables plantation managers to make the management decisions necessary to maximize timber production.

Quantifying Natural Resources Using Field-Based Instruction And Hands-On Applications, Daniel Unger, David Kulhavy, I-Kuai Hung, Yanli Zhang

Faculty Publications

Undergraduate students pursuing a Bachelor of Science in Forestry (BSF) degree at Stephen F. Austin State University (SFA) attend an intensive 6-week residential hands-on instruction in applied field methods. For students pursuing the BSF degree knowing the exact location, length, or area of a forestland is crucial to the understanding and proper management of any related natural resource. The intensive 6-week instruction includes teaching how to use the Global Positioning System (GPS) to accurately record the true spatial location of an earth’s surface feature. After receiving hands-on instructions during the summer of 2013, students were taken to the field to …

Using Google Earth For Forest Management, Yanli Zhang, Jeremy P. Stovall

Faculty Publications

No abstract provided.

Atcofa Monograph 1-2014, Steven H. Bullard, Dean W. Coble, Theresa Coble, Ray Darville, Laurie Rogers, Pat Stephens Williams

ATCOFA Monograph Series

Producing ‘Society-ready’ Foresters:

A Research-based Process to Revise the Bachelor of Science in Forestry Curriculum at Stephen F. Austin State University

Cycloastragenol, A Triterpene Aglycone Derived From Radix Astragali, Suppresses The Accumulation Of Cytoplasmic Lipid Droplet In 3t3-L1 Adipocytes (Abstract), Shifeng Wang, Chenxi Zhai, Qing Liu, Xing Wang, Zhenzhen Ren, Yuxin Zhang, Yanling Zhang, Qinghua Wu, Shengnan Sun, Shiyou Li, Yanjiang Qiao

NCPC Publications and Patents

No abstract provided.

Identification Of Natural Compound Carnosol As A Novel Trpa1 Receptor Agonist, Chenxi Zhai, Qing Liu, Yuxin Zhang, Shifeng Wang, Yanling Zhang, Shiyou Li, Yanjiang Qiao

NCPC Publications and Patents

The transient receptor potential ankyrin 1 (TRPA1) cation channel is one of the well-known targets for pain therapy. Herbal medicine is a rich source for new drugs and potentially useful therapeutic agents. To discover novel natural TRPA1 agonists, compounds isolated from Chinese herbs were screened using a cell-based calcium mobilization assay. Out of the 158 natural compounds derived from traditional Chinese herbal medicines, carnosol was identified as a novel agonist of TRPA1 with an EC50 value of 12.46 µM. And the agonistic effect of carnosol on TRPA1 could be blocked by A-967079, a selective TRPA1 antagonist. Furthermore, the specificity of …

Chemical Constituents From Pterocarpus Soyauxii, Zushang Su, Ping Wang, Wei Yuan, Shiyou Li

NCPC Publications and Patents

Three new benzofurans (1-3) and one new isoflavan (4), pteroyanin G, H, I and J, together with 21 known compounds, were isolated from the heartwood of Pterocarpus soyauxii. Their structures were determined by the NMR and MS spectral data in comparison with literature data. Compounds (1-25) did not show cytotoxicity against three human cancer cell lines, A549, Panc-28, and HCT-116 (Gl50 > 50 μM)

Ethnobotany Of Camptotheca Decaisne: New Discoveries Of Old Medicinal Uses, Shiyou Li, Wanli Zhang

NCPC Publications and Patents

Camptotheca trees had been used as fuelwood and an ornamental species in its native China. There were no reports on medicinal uses of Camptotheca in China and thus it was believed the trees had no medicinal before its antitumor activity discovered in 1957. We conducted national surveys of Camptotheca in China from 1994 to 1999. We found that Camptotheca acuminate is commonly known as happytree (xi shu) because the trees can be used as folk medicine to cure stubborn phlegm as well as other diseases, thus making patients “happy”. There are three local names to refer the uses of C. …

Trichome Management To Enhance Camptothecins In Camptotheca Decaisne, Shiyou Li, Zhizhen Zhang, Ping Wang, Wei Yuan

NCPC Publications and Patents

Inducible chemical defenses of plants have received much attention in the last three decades, and these defenses often involve trichomes. It is known that some plant secondary metabolites may accumulate in trichomes which can protect plants from damage by herbivores. However, studies on plant trichomes are largely limited to some major vegetable or cash crops and model species with large glandular trichomes (e.g., Nictotiana and Arabidopsis). In fact, the existing studies on the effect of damage (pruning or defoliation) on trichome density or chemical production in plants are partial and even contradictory. Management strategies to maximize chemical induction in …

Winter Movements Of Louisiana Pine Snakes (Pituophis Ruthveni) In Texas And Louisiana, Josh B. Pierce, D. Craig Rudolph, Shirley J. Burgdorf, Richard R. Schaefer, Richard N. Conner, John G. Himes, C. Mike Duran, Laurence M. Hardy, Robert R. Fleet

Faculty Publications

Despite concerns that the Louisiana Pine Snake (Pituophis ruthveni) has been extirpated from large portions of its historic range, only a limited number of studies on their movement patterns have been published. Winter movement patterns are of particular interest since it has been hypothesized that impacts of management practices would be reduced during the winter. Using radiotelemetry, we determined winter movement patterns of Louisiana Pine Snakes (11 males, 8 females) in 5 study areas (2 in Louisiana and 3 in Texas). Movements during winter (November–February) were greatly curtailed compared to the remainder of the year; however, snakes occasionally undertook substantial …

Producing “Society-Ready” Foresters: A Research-Based Process To Revise The Bachelor Of Science In Forestry Curriculum At Stephen F. Austin State University, Steven H. Bullard, Pat Stephens Williams, Theresa Coble, Dean W. Coble, Ray Darville, Laurie Rogers

Faculty Publications

“Society-ready” foresters are capable of dealing effectively with the complex economic, ecological, and social issues involving forestry in the 21st century. To assess the knowledge areas, skill sets, abilities, and behaviors needed by society-ready, entry-level foresters today, we surveyed 800 forestry employers and forestry alumni from Stephen F. Austin State University (SFASU), and we also conducted focus group sessions with a total of 58 forestry employers. Important areas of knowledge on emerging issues for society-ready Bachelor of Science in Forestry (BSF) graduates included climate change, water availability and quality, and dealing with invasive plants, pathogens, and insects. However, the skill …

Using Infrared-Triggered Cameras To Monitor Activity Of Forest Carnivores, Matthew E. Symmank, Christopher E. Comer, James C. Kroll

Faculty Publications

The activity patterns of 4 forest predator species were monitored, using infrared-triggered cameras, within a 1318-ha study area in East Texas. We recorded 161 photographic capture events in 1925 trap-nights over 17 weeks. Photographic capture events included 18 Lynx rufus (Bobcat), 109 Procyon lotor (Raccoon), 21 Didelphis virginiana (Virginia Opossum), and 13 Canis latrans (Coyote). We developed an easily replicated method of measuring time on a percent scale to compare activity data over several months, accounting for changes in sunrise and sunset times. Bobcat activity was 38.9% crepuscular and 22.1% diurnal. The activity of the other 3 species was mostly …

Roosts Of Rafinesque’S Big-Eared Bats And Southeastern Myotis In East Texas (Abstract), Leigh A. Struemke, Christopher E. Comer, Warren C. Conway

Faculty Publications

No abstract provided.

Artificial Nests Identify Possible Nest Predators Of Eastern Wild Turkeys (Abstract Only), Warren C. Conway, Christopher E. Comer

Faculty Publications

No abstract provided.

Validating One-On-One Gps Instruction Methodology For Natural Resource Area Assessments Using Forestry Undergraduate Students, Daniel R. Unger

Faculty Publications

Undergraduate students pursuing a Bachelor of Science in Forestry (BSF) at Stephen F. Austin State University (SFA) attend an intensive 6-week residential hands-on instruction in applied field methods. The intensive 6-week instruction includes learning how to use the Global Positioning System (GPS) with a Garmin eTrex HCx GPS unit to accurately calculate area. Students were instructed how to assess the accuracy of their GPS collected waypoints by calculating the Root Mean Square Error (RMSE) comparing their GPS collected area measurements with instructor on-screen digitized area. Student’s average area RMSE between digitized and GPS derived area was 0.015 hectares, whereas instructor’s …

New Host And Location Record For The Bat Bug Cimex Adjunctus Barber 1939, With A Summary Of Previous Records, M. E. Grilliot, J. L. Hunt, C. G. Sims, Chris E. Comer

Faculty Publications

In June 2009, 14 Rafinesque’s big-eared bats (Corynorhinus rafinesquii) were collected from an abandoned house near Shepherd, San Jacinto County, Texas. Three individuals harbored bat bugs which were subsequently identified as Cimex adjunctus Barber 1939. This is the first record of this species from C. rafinesquii. In August 2013, 10 C. rafinesquii were collected from a maternity colony in Drew County in southeastern Arkansas. Four of the bats harbored bat bugs, which were identified as C. adjunctus. This is the first record of this bat bug from Arkansas. A summary of previous state and host records of the insect is …

University-Based Forestry Research And "The Little Red Hen", Steven H. Bullard

Faculty Publications

Universities have three basic mission areas: service, teaching, and research. Through the service mission, many forest landowners participate in forestry extension programs and use university-based out reach materials and resources. Many forest landowners also recognize the teaching mission of universities by interacting regularly with forestry professionals who were trained through academic programs accredited by the Society of American Foresters. These two mission areas, service and teaching, have been and continue to be relevant to millions of forest landowners across the nation.

But what about university-based forestry research? As a forestry dean and as current president of the National Association of …

Communications In Our Forestry Curriculum: How Are We Meeting The Need? (Abstract), Pat Stephens Williams, Ray Darville

Faculty Posters

No abstract provided.