Life Sciences Commons^™

Abdominal Muscle Activation When Performing Abdominal Exercises On A Gym Ball And A Flat Surface, Wesley Brian Zwiefel

Dissertations and Theses @ UNI

The purpose of the study is to determine if there is a difference in muscle activation when performing three common abdominal exercises, isolating the rectus abdominis and external obliques, on a contoured gym ball compared to a flat surface. Thirty female volunteers, aged 19-24, performed an abdominal crunch (AC), an abdominal crunch with a twist (ACWT), and a side-lying crunch (SC) on both a flat table and on a gym ball. A stabilization base was utilized to control instability when on the ball. Exercises were performed in random order to prevent the first exercise to avoid the first exercise from …

Windbreaks In North American Agricultural Systems, James R. Brandle, Laurie Hodges, Xinhua H. Zhou

Department of Agronomy and Horticulture: Faculty Publications

Windbreaks are a major component of successful agricultural systems throughout the world. The focus of this chapter is on temperate-zone, commercial, agricultural systems in North America, where windbreaks contribute to both producer profitability and environmental quality by increasing crop production while simultaneously reducing the level of off-farm inputs. They help control erosion and blowing snow, improve animal health and survival under winter conditions, reduce energy consumption of the farmstead unit, and enhance habitat diversity, providing refuges for predatory birds and insects. On a larger landscape scale windbreaks provide habitat for various types of wildlife and have the potential to contribute …

Windbreaks, Robert J. Rouse, Laurie Hodges

Department of Agronomy and Horticulture: Faculty Publications

Windbreaks are an important and often overlooked component of a plasticulture system. They provide benefits regardless of where you farm or what crops you are raising. When wind protection is included in a plasticulture production system, crops benefit from less wind stress and an improved microclimate for growth and development. There is less crop injury due to soil abrasion or wind-whipping of plants, less extreme soil temperature fluctuations, and improved soil warming. Wind protection often results in earlier yields of higher-quality crops.

Distribution Of Legumes Along Gradients Of Slope And Soil Electrical Conductivity In Pastures, John A. Guretzky, Kenneth J. Moore, C. Lee Burras, E. Charles Brummer

Department of Agronomy and Horticulture: Faculty Publications

Legumes establish and persist on backslope landscape positions but fail on summits and toeslopes in southeastern Iowa pastures, suggesting that these pastures be managed site specifically. Visual delineation of landscape positions, however, can be difficult, and char- acterization of spatial variability through soil sampling is expensive. Creation of digital elevation models (DEM) and apparent soil electrical conductivity (EC_a) mapping are inexpensive alternatives to de- scribing field conditions. Our objective was to examine the relationships of DEM-derived slope, soil EC_a, and legume distribution in pastures.We examined these relationships across four 1.4-ha pastures. Each pasture was divided into …

Genotypic And Environmental Modification Of Asian Noodle Quality Of Hard Winter Wheats, Robert A. Graybosch, N. Ames, P. Stephen Baenziger, C. J. Peterson

Department of Agronomy and Horticulture: Faculty Publications

The relative effects of environment, genotype, and their interactions on the modification of Asian noodle quality attributes were assessed using 38 winter wheat (Triticum aestivum L.) cultivars and breeding lines grown in replicated trials at three Nebraska locations in harvest year 2000. Noodle color was determined in both white salted and yellow alkaline procedures, and noodle textural features were investigated by producing white salted noodles. Significant environmental, genotypic, and genotype-by-environment variation was observed for nearly all initial and 24-hr noodle color traits in both types of noodles. Significant genotypic effects were observed for several textural traits, while significant environmental …

Registration Of Npm-4, A Dwarf White Grain Pearl Millet Germplasm, J.F. Rajewski, D.J. Andrews, Ismail M. Dweikat

Department of Agronomy and Horticulture: Faculty Publications

Dwarf grain pearl millet [Pennisetum glucum (L.) R. Br.] germplasm NPM-4 (Reg. no. GP-37, PI 634545) was released in September 2003 by the Institute of Agriculture and Natural Resources, University of Nebraska, Lincoln, NE.

NPM-4 was derived from open-pollinated outcrosses of white grain inbred line 57028R1w grown in a 1998 Puerto Vallarta winter nursery. The source of the outcross pollen was from primarily genetically diverse, dwarf, early maturing, gray seeded lines being developed as parents for grain yield. Line 57028R₁w was derived from 89C57028R₁/3*90PV0121. Line 89C57028R₁ is gray-seeded, and line 90PV0121 has white seed. …

Heritability Of The Resistance To Potato Leafhopper In Dry Bean, J.W. Gonzales, Dermot P. Coyne, Dale T. Lindgren, D. Schaaf, Kent M. Eskridge

Department of Agronomy and Horticulture: Faculty Publications

The potato leafhopper (PLH), Empoasca fabae Harris is the most important Empoasca species attacking dry beans (Phaseolus vulgaris L.) in North America. The objective of this study was to determine the heritability (h²) of PLH injury based on parent-offspring regression analysis of F₃ means on individual F₂ plants derived from crosses of pinto 'Sierra' (resisant) x great northern 'Starlight' (susceptible), and black bean 'Tacarigua' (resistant) x 'Starlight' (susceptible). Low narrow-sense heritability values of 0.29 ± 0.06 ± 0.28 ± 0.10, respectively, were obtained for the above crosses. The low narrow-sense heritability estimates indicated large environmental …

Improved Rooting And Acclimatization Of Micropropagated Hazelnut Shoots, Mehmet Nuri Nas, Paul Read

Department of Agronomy and Horticulture: Faculty Publications

Microshoots of four hazelnut genotypes grown in vitro on Nas and Read medium (NRM) containing various combinations of CuSO₄ ∙ 5H₂O and myo-inositol were successfully rooted and acclimatized ex vitro without any need of in vitro hardening treatments. Dipping of shoot bases in 1000 ppm indole-3-butyric acid (IBA) solution for 5 or 10 seconds followed by placement of shoots in plant growth regulator free NRM gave rise to formation of roots as early as 8 days. Shoots treated for 5 and 10 seconds rooted similarly, and depending on genotype, 88%-98% rooting was observed within 15 days after …

Implementation Of A Mitochondrial Mutator, Sally Mackenzie, Ricardo Vilela Abdelnoor

Department of Agronomy and Horticulture: Faculty Publications

Plant MSH1 polynucleotides and polypeptides are described. Also described are methods for the use and modulation of such MSH1 polynucleotides and polypeptides.

Multiple Domains Of The Co-Chaperone Hop Are Important For Hsp70 Binding, Gregory M. Nelson, Patricia E. Carrigan, Patricia J. Roberts, Jha'nae Stoffer, Daniel L. Riggs, David F. Smith

Faculty Publications

The Hop/Sti1 co-chaperone binds to both Hsp70 and Hsp90. Biochemical and co-crystallographic studies have suggested that the EEVD-containing C terminus of Hsp70 or Hsp90 binds specifically to one of the Hop tetratricopeptide repeat domains, TPR1 or TPR2a, respectively. Mutational analyses of Hsp70 and Hop were undertaken to better characterize interactions between the C terminus of Hsp70 and Hop domains. Surprisingly, truncation of EEVD plus as many as 34 additional amino acids from the Hsp70 C terminus did not reduce the ability of Hsp70 mutants to co-immunoprecipitate with Hop, although further truncation eliminated Hop binding. Hop point mutations targeting a carboxylate …

Threatened Fishes Of The World: Iotichthys Phlegethontis Cope, 1874 (Cyprinidae), Joseph H. Hanks, Mark C. Belk

Faculty Publications

Common name: least chub.

2004 Weed Science Research Report - Green Section, Ndsu Weed Science, Dept. Of Plant Sciences

Plant Sciences Weed Science Reports

The Weed Science team at North Dakota State University conduct field research in the State of North Dakota. This specific document reports on field research conducted in 2004. It includes work on wheat and the management of several weeds in North Dakota.

2004 Weed Science Research Report - Pink Section, Ndsu Weed Science, Dept. Of Plant Sciences

Plant Sciences Weed Science Reports

The Weed Science team at North Dakota State University conduct field research in the State of North Dakota. This specific document reports on field research conducted in 2004. It includes work on Canada thistle, common burdock, leafy spurge and Russian thistle in North Dakota.

2004 Weed Science Research Report - Yellow Section, Ndsu Weed Science, Dept. Of Plant Sciences

Plant Sciences Weed Science Reports

The Weed Science team at North Dakota State University conduct field research in the State of North Dakota. This specific document reports on field research conducted in 2004. It includes work on bean, canola, carrots, lentil, sunflower and the management of several weeds in North Dakota.

2004 Weed Science Research Report - Blue Section, Ndsu Weed Science, Dept. Of Plant Sciences

Plant Sciences Weed Science Reports

The Weed Science team at North Dakota State University conduct field research in the State of North Dakota. This specific document reports on field research conducted in 2004. It includes work on corn and soybean and the management of several weeds in North Dakota.

Demographic Estimates From Y Chromosome Microsatellite Polymorphisms: Analysis Of A Worldwide Sample, J. Michael Macpherson, Sohini Ramachandran, Lisa Diamond, Marcus W. Feldman

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Polymorphisms in microsatellites on the human Y chromosome have been used to estimate important demographic parameters of human history. We compare two coalescent-based statistical methods that give estimates for a number of demographic parameters using the seven Y chromosome polymorphisms in the HGDP-CEPH Cell Line Panel, a collection of samples from 52 worldwide populations. The estimates for the time to the most recent common ancestor vary according to the method used and the assumptions about the prior distributions of model parameters, but are generally consistent with other global Y chromosome studies. We explore the sensitivity of these results to assumptions …

Correlation Between Atmospheric Co2 Concentration And Vegetation Greenness In North America: Co2 Fertilization Effect, C. Lim, Menas Kafatos, P. Megonigal

Mathematics, Physics, and Computer Science Faculty Articles and Research

The possibility that rising atmospheric CO2 concentrations are influencing plant growth in contemporary ecosystems has received little attention, and the studies that exist have been done on a small spatial scale. We correlated the monthly rate of relative change in normalized differenced vegetation index (NDVI) from advanced very high resolution radiometer (AVHRR) data to the rate of change in atmospheric CO2 concentration during the natural vegetation growing season for evidence of a possible CO2 fertilization effect on vegetation development. The study addressed seasonal and annual patterns in spatially averaged NDVI for 3 different ecological regions in North America from 1982 …