Life Sciences Commons^™

Age, Growth, And Mortality Of Black Drum, Pogonias Cromis, In The Chesapeake Bay Region, Cynthia M. Jones, Brian Wells

OES Faculty Publications

We used otolith ageing to describe the population dynamics of black drum, Pogonias cromis, collected over a three-year period from the Chesapeake Bay region's commercial and recreational fisheries. Black drum average age, total length, and weight were 26 years, 109.5 cm, and 22.1 kg respectively. The oldest fish was 59 years and fish older than 50 years were present in the catch from 1990 to 1992. Growth in length slowed by age 20, whereas growth in weight did not slow until age 45. A von Bertalanffy growth function was fitted to our data (L(infinity) = 117.3 cm, …

Nodule Organogenesis And Symbiotic Mutants Of The Model Legume Lotus Japonicus, Krzysztof Szczyglowski, Robert S. Shaw, Judith Wopereis, Sue Copeland, Dirk Hamburger, Beth Kasiborski, Frank B. Dazzo, Frans J. De Bruijn

Biological Sciences: Faculty Publications

A detailed microscopical analysis of the morphological features that distinguish different developmental stages of nodule organogenesis in wild-type Lotus japonicus ecotype Gifu B-129-S9 plants was performed, to provide the necessary framework for the evaluation of altered phenotypes of L. japonicus symbiotic mutants. Subsequently, chemical ethyl methanesulfonate (EMS) mutagenesis of L. japonicus was carried out. The analysis of approximately 3,000 M1 plants and their progeny yielded 20 stable L. japonicus symbiotic variants, consisting of at least 14 different symbiosis- associated loci or complementation groups. Moreover, a mutation affecting L. japonicus root development was identified that also conferred a hypernodulation response when …

Detection Of The Filarial Parasite Mansonella Streptocerca In Skin Biopsies By A Nested Polymerase Chain Reaction-Based Assay, Peter U. Fischer, Dietrich W. Büttner, Jotham Bamuhiiga, Steven A. Williams

Biological Sciences: Faculty Publications

To differentiate the skin-dwelling filariae Mansonella streptocerca and Onchocerca volvulus, a nested polymerase chain reaction (PCR) assay was developed from small amounts of parasite material present in skin biopsies. One nonspecific and one specific pair of primers were used to amplify the 5S rDNA spacer region of M. streptocerca. Biopsies with different microfilaria densities obtained from 104 Ugandans living in an area endemic forM. streptocerca were tested using both the nested PCR assay and standard parasitologic assessment of microfilariae. All 82 samples from microfilaria carriers were positive when tested using the nested PCR assay. In addition, M. streptocerca DNA could …

Logging In Alaska's Boreal Forest: Creation Of Grasslands Or Enhancement Of Moose Habitat, William B. Collins, Charles C. Schwartz

Aspen Bibliography

Timber harvest in Alaska’s boreal forest can greatly enhance or severely reduce moose (Alces alces) habitat quality, depending on forest management objectives, timing and methods of harvest, and post-logging site preparation. Overstory removal associated with timely exposure of mineral soil favors establishment of early successional hardwoods important as moose browse. A combination of clear-cutting and soil scarification on mesic sites mimics fire, windfall, and fluvial erosion, important natural forces that drive regeneration of the boreal forest. When cut during dormancy, aspen (Populus tremuloides) and balsam poplar (P. balsamifera) Regenerate prolifically by root and stump …

On The Use Of Tide Gauges To Determine Altimeter Drift, D. P. Chambers, J. C. Ries, C. K. Shum, B. D. Tapley

Marine Science Faculty Publications

TOPEX measurements of sea level variability have been compared to tide gauge measurements from 40 sites and to dynamic topography measurements computed from temperatures recorded at 23 Tropical Ocean-Global Atmosphere (TOGA)-Tropical Atmosphere-Ocean (TAO) buoys in the eastern Pacific and mean temperature-salinity profiles. Buoy data in the western Pacific were not used because of large long-term slopes in the data that appear to be due to interannual salinity variations. The relative drift between TOPEX and the two different in situ sets of data agree within 1 mm yr⁻¹, with a weighted average of −2.6 mm yr⁻¹ and an …

Seasonal Global Water Mass Budget And Mean Sea Level Variations, J. L. Chen, C. R. Wilson, D. P. Chambers, R. S. Nerem, B. D. Tapley

Marine Science Faculty Publications

Analysis of TOPEX/Poseidon satellite altimeter data indicates that the global mean sea level variation has a clear seasonal signal with an amplitude of about 2 to 3 mm, along with a long term drift. This seasonal variation is associated with mass redistribution within the global hydrological cycle plus steric thermal contributions. We investigate seasonal variations of water vapor in the atmosphere and water storage on land using both assimilated atmospheric models and climatological data, and to estimate the corresponding global mean sea level changes. The predicted seasonal global mean sea level changes are then compared with the seasonal variabilities observed …

Measuring Heat Storage Changes In The Equatorial Pacific: A Comparison Between Topex Altimetry And Tropical Atmosphere-Ocean Buoys, D. P. Chambers, B. D. Tapley, R. H. Stewart

Marine Science Faculty Publications

Heat storage variations in the equatorial Pacific have been studied from December 1992 through February 1997, using sea level data from the TOPEX altimeter and temperatures measured by 42 tethered buoys that are part of the Tropical Ocean-Atmosphere (TAO) array. The TOPEX measurements are converted to heat storage anomalies using a coefficient determined from mean climatological values. For 30-day averages the two measurements agree well over most of the region, except for the southwestern quadrant of the warm pool and a small region of the north-central equatorial Pacific. In the southwestern quadrant the TOPEX measurements indicate a smaller long-term heating …

Plate Tectonic Reconstructions Of The Juan Fernandez Microplate: Transformation From Internal Shear To Rigid Rotation, Robert T. Bird, David F. Naar, Roger L. Larson, Roger C. Searle, Christopher R. Scotese

Marine Science Faculty Publications

Side-scan sonar, swath bathymetry and magnetic anomaly date define a detailed, three-phase history of the Juan Fernandez microplate. The ∼6 m.y. history is presented in a series of discrete time steps to document the growth and reorganization of propagating spreading centers and structural feature, and microplate kinematic evolution. Prior to the microplate, the East Pacific Rise at the Pacific-Antarctic-Nazca triple junction was offset by a long transform fault zone, likely the fastest slipping transform on Earth at anomaly 3A time. The microplate originated from an intratransform setting between anomaly 3A (5.95 Ma) and anomaly 3 (5.24 Ma) time. Its early …

Ec98-899 Sorghum Basis Patterns From Selected Sites In Nebraska

University of Nebraska-Lincoln Extension: Historical Materials

The following publication contains the sorghum basis patterns for several towns in Nebraska. Price information was collected through surveys, newspapers, electronic media, etc. The listing includes towns representative of different geographic locations in Nebraska. The amount of data varies among locations. This publication will be updated each year by adding a year's data to each locations. This allows the user to observe the changing of basis patterns over time.

G98-1358 Feeding To Maximize Protein And Fat, Rick J. Grant

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide describes feeding guidelines to increase milk fat and protein production.

Proper feeding management of dairy herds can both improve the economy of production and provide a healthier cow. To achieve these goals, producers must feed to increase production of milk with maximum levels of milk fat and protein.

Milk solids components include fat, protein, lactose and minerals. Normal values for milk fat range from 3.7 percent (Holstein) to 4.9 percent (Jersey); milk protein ranges from 3.1 percent (Holstein) to 3.8 percent (Jersey). Lactose is usually 4.6–4.8 percent for all breeds; minerals (ash) average .74 percent. Because current milk …

Ec98-796 Farm*A*Syst Nebraska’S System For Assessing Water Contamination Worksheet 17: Stormwater Management At Residential Sites, Robert Grisso, Delynn Hay, Paul J. Jasa, Richard K. Koelsch, Sharon Skipton, Wayne Woldt

University of Nebraska-Lincoln Extension: Historical Materials

Stormwater is water from irrigation, rain or melting snow that does not soak into the ground. It flows from rooftops, over paved areas and bare soil, and across sloped lawns. As it flows, this runoff can collect and transport soil, pet waste, livestock manure, salt, pesticides, fertilizer, oil and grease, leaves, litter and other potential pollutants. A heavy rainstorm isn’t needed to send pollutants rushing toward streams, wetlands and lakes. A garden hose alone can supply enough water.

Nf98-382 Dealing With Change: Emotional Overload, Herbert G. Lingren

University of Nebraska-Lincoln Extension: Historical Materials

This NebFact discusses ways to cope with extreme stress and change.

Nf98-394 Blame: A Human Response To Threat, Herbert G. Lingren

University of Nebraska-Lincoln Extension: Historical Materials

This NebFact discusses the role of blame in relationships.

G98-1368 Medical Record Privacy, Mary Ellen Rider, Lisa Ahlberg, Judy Weber

University of Nebraska-Lincoln Extension: Historical Materials

Medical record privacy is an important issue of the 1990s. This NebGuide focuses on access to our medical records, the risks of inappropriate use of medical records, and what you as a health consumer can do should you face those risks.

Many of us think our medical records are confidential, seen only by our doctors. The truth is, however, a number of people have access to them. The real question is whether we have true privacy of our medical records.

Think of all the information in your medical records. In addition to diagnostic and testing information, they contain the details …

Nf98-381 So Where Do I Put That $2,000?, Kathy Prochaska-Cue

University of Nebraska-Lincoln Extension: Historical Materials

This NebFact provides an estimation for retirement financial planning.

Ec98-749 Farm*A*Syst Nebraska’S System For Assessing Water Contamination Risk Fact Sheet 12: Improving Silage Storage, Robert Grisso, Delynn Hay, Paul J. Jasa, Richard K. Koelsch, Sharon Skipton, Wayne Woldt

University of Nebraska-Lincoln Extension: Historical Materials

Silage is an important feed for livestock-based agriculture. When properly harvested and stored, silage poses little or no pollution threat, but improper handling can lead to a significant flow of silage juices (or leachate) from the silo. Leachate is an organic liquid that results from pressure in the silo or from extra water entering the silo. It is usually a problem only when silage is fresh, or just after storage. This loss of leachate represents a loss of nutrient value from the silage.

Ec98-756 Farm*A*Syst Nebraska’S System For Assessing Water Contamination Risk Worksheet 13: Milking Center Effluent Treatment, Robert Grisso, Delynn Hay, Paul J. Jasa, Richard K. Koelsch, Sharon Skipton, Wayne Woldt

University of Nebraska-Lincoln Extension: Historical Materials

Why should I be concerned? Milking center effluent is usually considered a dairy sanitation problem. If not properly managed, however, the effluent can contaminate both groundwater and surface water.

Ec98-755 Farm*A*Syst Nebraska’S System For Assessing Water Contamination Risk Fact Sheet 13: Improving Milking Center Effluent Treatment, Robert Grisso, Delynn Hay, Paul J. Jasa, Richard K. Koelsch, Sharon Skipton, Wayne Woldt

University of Nebraska-Lincoln Extension: Historical Materials

Effluent from the dairy milking center, including discharges from the milking parlor (manure, feed solids, hoof dirt) and milkhouse (bulk tank and pipeline rinse water and detergent used in cleaning), is commonly disposed of in a variety of ways. Milking center effluent offers several unique challenges due to the presence of: 1. Large volumes of contaminated water which can overwhelm soil absorption systems. 2. Milk solids and fats and manure solids which plug many systems. 3. Cleaning sanitizers which reduce bacterial breakdown of solids. When these systems fail, effluent will become a risk to surface and groundwater quality.

Ec98-765 Farm*A*Syst Nebraska’S System For Assessing Water Contamination Fact Sheet 3: Improving Drinking Water Well Condition, Robert Grisso, Delynn Hay, Paul J. Jasa, Richard K. Koelsch, Sharon Skipton, Wayne Woldt

University of Nebraska-Lincoln Extension: Historical Materials

Groundwater protection is an important aspect of farm, ranch and rural homesite management today. Nearly all rural families rely on groundwater for their drinking water. Safeguarding the drinking water depends on where the well is placed on the site, how the well was constructed, how the well is maintained, the siting of new wells, and managing wells no longer in use.

Ec98-761 Farm*A*Syst Nebraska’S System For Assessing Water Contamination Worksheet 10: Livestock Yards Management, Robert Grisso, Delynn Hay, Paul J. Jasa, Richard K. Koelsch, Sharon Skipton, Wayne Woldt

University of Nebraska-Lincoln Extension: Historical Materials

Why should I be concerned? Livestock yards, such as barnyards, holding areas and feedlots, are areas of concentrated livestock wastes and a potential source of nutrient, solids, and bacteria contamination of surface and groundwater. Yards that are abandoned permanently or are inactive temporarily also represent a potential risk.

Ec98-770 Farm*A*Syst Nebraska’S System For Assessing Water Contamination Worksheet 5: Fertilizer Storage And Handling, Robert Grisso, Delynn Hay, Paul J. Jasa, Richard K. Koelsch, Sharon Skipton, Wayne Woldt

University of Nebraska-Lincoln Extension: Historical Materials

Why should I be concerned? Fertilizers play a vital role in agriculture. Over the years, fertilizers have increased farm production dramatically. Commercial fertilizer is, however, a major source of nitrate. Your drinking water is least likely to be contaminated if you follow appropriate management procedures or dispose of wastes off the farm site. However, proper offsite disposal practices are essential to avoid risking contamination that could affect the water supplies and health of others.

G98-1364 Feeding Children Ages 2 To 5, H. Darlene Martin

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide defines nutritional needs and healthy eating patterns for children ages 2 to 5.

Children Grow at Their Own Rate

Children move though growth spurts throughout childhood. Usually, a child will grow about 2 1/2 inches and gain about four or five pounds each year between the ages of 2 and 5. By 15 months old, most children have developed enough fine motor skills to feed themselves without help, if allowed to do so. Appetites vary with young children as well as adults. Parents and caregivers need to help promote a healthy pattern of eating rather than using controlling …

G98-1349 Woody Landscape Plants: Selection And Planting, Justin R. Evertson, David P. Mooter, Mark O. Harrell

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses how to select the right tree or shrub for any location and how to properly plant and care for it.

Properly planted and cared for trees and shrubs add beauty, protection, diversity and value to almost any property, whether they are planted in a park, in front of your house, or along a street or highway.

Planting is only the first step in the process of maintaining a well kept, desirable landscape. Proper maintenance practices need to be considered and performed on an annual basis to ensure the plant's long term health and vigor. Landscape trees and …

Cc98-411 Money 2000+ Savings/Debt Tracker, Kathleen Prochaska-Cue

University of Nebraska-Lincoln Extension: Historical Materials

Money 2000+ Savings/Debt Tracker is a front and back form that helps you keep track of your savings and debts over a six-month period. On the front side, it has places to list your savings accounts, money market accounts, stocks, mutual funds, bonds (savings, government, corporate, CDs), and private retirement funds (IRAs, annuities) on one side. On the back side it lists the debts you may have accrued such as past due bills, credit cards, vehicle loans, home equity loans, personal and/or other loans.

Ec98-1876 Foliar And Fruit Diseases Of Cucurbits, Jane A. Christensen, Loren J. Giesler

University of Nebraska-Lincoln Extension: Historical Materials

Members of the cucurbit family are well adapted to Nebraska's weather conditions and are grown in both gardens and commercial fields. Cucurbits include cucumbers, squash, melons, gourds, gherkin, vegetable marrow, and pumpkins. They are susceptible to varying degrees to diseases caused by fungi, bacteria and viruses. Accurate disease diagnosis is an essential part of crop management and can help growers attain maximum yields.

This extension circular explains these diseases of cucurbits and how to control them.

Ec98-149 Summer Annual Forages For The Nebraska Panhandle: Variety Tests, 1989-1992 And 1997, Burt Weichenthal, David D. Baltensperger, Patrick E. Reece

University of Nebraska-Lincoln Extension: Historical Materials

Summer annual forage grasses can provide valuable forage as pasture, green chop, silage, and hay. With adequate soil moisture these forages grow very rapidly during warm summer months. Most varieties are relatively drought resistant because of efficient water use. It is important to select a type and variety most suitable to the system in which it is to used. Nebraska producers have relied primarily on six types of summer annual forage grasses to meet or supplement forage needs. This circular is a summary report of summer annual forage trials conduted in 1989-92 and 1997 to obtain forage production and quality …

Nf98-373 Preparation And Use Of Wheatgrass Stands After Crp And Associated Costs/Income — Part Ii, Patrick E. Reece, Tom Holman, David W. Cook

University of Nebraska-Lincoln Extension: Historical Materials

The following sample worksheet and worksheet can be used to calculate costs and income for your specific operation. For more information on preparing and using wheatgrass stands following CRP, please see the companion publication, Preparation and Use of Wheatgrass Stands after CRP and Associated Costs/Income — Part I, NF98-372.

Type I Camp-Dependent Protein Kinase Delays Apoptosis In Human Neutrophils At A Site Upstream Of Caspase-3, Lav K. Parvathenani, E. Stephen Buescher, Enrique Chacon-Cruz, Stephen J. Beebe

Bioelectrics Publications

Current data suggest that apoptosis controls neutrophil numbers in tissues. We analyzed roles for and the sites of action for the cAMP-dependent protein kinases (cAPKs) in apoptosis induced in human neutrophils by in vitro storage, cycloheximide (CHX) exposure, and anti-Fas exposure. Treatment with 8-chlorophenylthio-cAMP (8-CPT-cAMP) prolonged the time required for 50% of the cells to exhibit apoptotic morphology (t 50) from 16.3 to 41.8 h (in vitro culture), from 2.4 to 7.8 h (CHX), and from 4.8 to 6.5 h (anti-Fas). CHX ± 8-CPT-cAMP did not significantly alter resting intracellular calcium levels and H-89, a selective inhibitor of cAPK, had …

Human Dental Microwear Caused By Calcium Oxalate Phytoliths In Prehistoric Diet Of The Lower Pecos Region, Texas, Dennis Danielson, Karl Reinhard

Karl Reinhard Publications

Recent research demonstrates that silica phytoliths of dietary origin are associated with microwear of human teeth. Previous research has shown that severe enamel microwear and dental wear characterizes Archaic hunter-gatherers in the lower Pecos region of west Texas. Calcium oxalate crystals are especially common in Archaic coprolites. The vast majority are derived from prickly pear and agave, which were the dietary staples in west Texas for 6,000 years. The calcium oxalate phytoliths are harder than enamel. Therefore, calcium oxalate crystals are the most likely source of previously documented dental microwear and wear in the lower Pecos region.Am J Phys Anthropol …

Improving Recovery Planning For Threatened And Endangered Species, Theodore Foin, Seth Riley, Anitra Pawley, Debra Ayres, Tina Carlsen, Peter Hodum, Paul Switzer

Faculty Research & Creative Activity

No abstract provided.