139 research outputs found
USING SELF-EFFICACY PRECEPTS TO EVALUATE THE INSTRUCTIONAL EFFECTIVENESS OF THE USE OF TABLET PC SYSTEMS IN THE CLASSROOM
This paper provides initial results of a study administered to students enrolled in traditional classroombased courses at a small public university in the Midwest. This university has a technology mission and requires the use of Tablet PCs by all incoming students seeking bachelor’s degrees. The purpose of this study is first, to measure student reactions to components of Tablet PC-based instruction as suggested by self-efficacy precepts, and second, to measure the differences between student groups with regard to perceptions of academic performance when using Tablet PC systems in traditional classroom settings. Initial findings show strong student enthusiasm to the adoption of the Tablet system and also suggest a direct connection between student self-efficacy levels and academic performance expectations
Proceedings of the 10th Annual Meeting, Southern Soybean Disease Workers (March 15-17, 1983, Houston, Texas): Significance of Soybean Diseases
Contents
1983 Southern Soybean Disease Workers Officers
1983 Southern Soybean Disease Workers Program Committee
Committee Chairmen
General session
Presidentiial address. W Winner
Soybean Research Needs and the American Soybean Association. KJ Smith
American Soybean Association Pesticide Assessment in the Administrative Hearing: An Educational Guide for the Agricultural Scientist. MT Olexa and AH Daniels
Soybean Disease Loss Estimate. E Koldenhoven
The influence of cultural practices on disease incidence. JG Kantzes presiding
The Relationship Between Chloride Uptake and Leaf Scorch of Soybeans. MB Parker, TP Gaines, and GJ Gascho
Effect of No-tillage on Fusarium Blight of Soybean on Delmarva. B Carroll
Effect of No-tillage on Severity of Losses from Soybean Cyst Nematode and Foliar Diseases. AY Chambers and TC McCutchen
Soybean nematodes. WS Hough presiding
Standardized Nematicide Research Report. A Wrather
Research on the Effects of Ectoparasitic Nematodes on Soybean Yields. EC McGawley
Relationship of Numbers of the Soybean Cyst Nematode and Soybean Crop Response in North Carolina. D Schmitt
Level of Resistance to Cyst Nematodes in Derived Lines of Soybeans. SC Anand and CR Shumway
Reduction of Soybean Cyst Nematodes Females by Furadan. AJ Howard
Effect of Trifluralin (Treflan) on Soybean Cyst Nematode. RD Riggs and LR Oliver
Graduate student presentations. D Schmitt presiding
Effect of Three Densities of Three Meloidogyne spp. on Soybean Growth in North Florida. CH Opperman
The Effects of Pratylenchus brachyurus on Yield Components of Soybeans. FR Koenning
Pod and Stem Infection by Phomopsis sp. during Soybean Seed Development and Maturation. JR Hicks, LJ Tomes, and DM TeKrony
New developments. G Rich, presiding
Label Amendments for Furadan in Soybeans. WS Hough
Summary of Super Tin 41 for Performance on Soybeans for Foliar Disease Control. EF Koldenhoven
Sudden Death Syndrome of Soybean: A Disease of Unknown Etiology. M Hirrel
Soybean, seed, seedling and soil-borne diseases. J Shriver presiding
Standardized Seed Treatment Research Report. MC McDaniel
Factors Affecting Survival and Density of Macrophomina in Soil. T Wyllie
Epidemiology and Control of Soybean Seed Diseases. D McGee
Evaluation for Resistance to Seed Diseases. JP Ross
Foliar, pod and stem diseases of soybeans. Mel Newman presiding
Summary of Regional Foliar Fungicide Treatments. AY Chambers and MA Newman
Disease Awareness Research Report and Data from Compromise Point System. R Smith
The Effect of Triphenyltin Hydroxide on Disease and Insect Control of Soybeans. G Whitney
Stem Canker in Tennessee: The Influence of Varieties, Foliar Sprays and Planting Dates. AY Chambers
Stem Canker in Alabama: The Effect of Varieties and Foliar Sprays. P Backman, M Crawford, and W Gazaway
Stem Canker in Mississippi: Varietal Response and Isolate Variation. B Moore
Isolation and Identification Techniques for Diaporthe phaseolorum var. caulivora. MA Crawford and PA Backman
Treasurer\u27s report. D Smit
Role stressors, service worker job resourcefulness, and job outcomes: An empirical analysis
This article expands upon previous research on the job resourcefulness construct by examining the influence of role stressors (i.e., role ambiguity and conflict) on job resourcefulness and by examining the influence of job resourcefulness on job satisfaction and intentions to leave the firm. Given the current focus of businesses to ‘‘do more with less’’, the research highlights the importance of role stressors in improving overall organizational efficiency and work outcomes. Drawing from previous work in both hierarchical personality and fit theories, the authors propose that situational determinants play an important role in overall job resourcefulness. An empirical study which utilized data obtained from a financial services institution supports the hypothesized relationships between role stressors, job resourcefulness, and job outcomes. Implications for practitioners and suggestions for future research in the area are discussed
Proceedings of the 11th Annual Meeting, Southern Soybean Disease Workers (March 27-29, 1984, Ft. Walton Beach, Florida): Economics of Soybean Disease
Contents
1984 Southern Soybean Disease Workers Officers
1984 Southern Soybean Disease Workers Program Committee
1984 Southern Soybean Disease Workers Committee Chairmen
Workshop
Diagnosing early season soybean disorders. D Stuckey and A Wrather
General session
Presidential address. HJ Walters
Southern United States Soybean Disease Loss Estimate for 1983. Southern Soybean Disease Workers, Soybean Disease Loss Estimate Committee. RP Mulrooney
Soybean nematodes. R Dunn presiding
A New Publication on the Soybean Cyst Nematode. WF Moore
Soybean Cultivars and Development of Populations of Meloidogyne incognita in Soil: A Concept of Tolerance. R Rodríguez-Kábana and DB Weaver
A Comparison of Soybean Cultivars for Their Resistance to Meloidogyne incognita and M. arenaria. RA Kinloch
Ethylene Dibromide and Alternative Nematicides for Soybeans. RA Dunn
Involvement of Fungi in Phytonematode Pathology. G Morgan-Jones and R Rodríguez-Kábana
Graduate student presentations. EC McGawley presiding
Interaction Between Heterodera glycines and Glomus macrocarpus on Soybeans as Affected by Aldicarb. DP McCormack, DP Schmitt, and KR Barker
Phomopsis sp. and Soybean Seedling Emergence: Influence of Soil Water Potential. M Gleason and RS Ferriss
Soybean seed, seedling and soil-borne diseases. WS Gazaway presiding
Report of Southern Soybean Disease Workers Seed Treatment Committee, 1983. MC McDaniel
Effects of Soil Source, Soil Moisture, Seed Quality and Seed Treatment on Soybean Emergence. RE Stuckey, RS Ferriss, and MR Siegel
Epidemiological and Mycofloral Relationships in Soybean Seedling Disease. JF Killebrew and KW Roy
Seed Treatments for Control of Seedling Diseases and Rhizoctonia Root Rot in No-Till Soybeans. AY Chambers
Soybean foliar, pod and stem diseases. JW Shriver presiding
Southern Soybean Disease Workers Standardized Foliar Fungicide Test, 1983. AY Chambers and MA Newman
Stem Canker in the Southeastern United States. WS Gazaway
Timings of Foliar Fungicide Applications on Soybeans in Louisiana. JS Gershey, GT Berggren, and ME Pace
Levels of Chlorine in Leaves and Seed Causing Leaf Scorch of Soybeans. MB Parker, TP Gaines, and GJ Gascho
Incidence and Yield Loss Estimates on Stem and Foliar Diseases as Affected by Row Spacing and Overhead Irrigation. MC Hirrell and MC McDaniel
Foliar Fungicides in Georgia: A Ten-Year Summary. DV Phillips
New developments. E Barrett presiding
The Use of Microcomputers in Soybean Disease Research. ME Pace, GT Berggren, Jr, and JS Gershey
Aerial Web Blight in Mississippi in 1983. JA Fox
SSDW Treasurer\u27s repor
Isotopic evidence for dominant secondary production of HONO in near-ground wildfire plumes
Nitrous acid (HONO) is an important precursor to hydroxyl radical (OH) that determines atmospheric oxidative capacity and thus impacts climate and air quality. Wildfire is not only a major direct source of HONO, it also results in highly polluted conditions that favor the heterogeneous formation of HONO from nitrogen oxides (NOx= NO + NO2) and nitrate on both ground and particle surfaces. However, these processes remain poorly constrained. To quantitatively constrain the HONO budget under various fire and/or smoke conditions, we combine a unique dataset of field concentrations and isotopic ratios (15N / 14N and 18O / 16O) of NOx and HONO with an isotopic box model. Here we report the first isotopic evidence of secondary HONO production in near-ground wildfire plumes (over a sample integration time of hours) and the subsequent quantification of the relative importance of each pathway to total HONO production. Most importantly, our results reveal that nitrate photolysis plays a minor role (\u3c5 %) in HONO formation in daytime aged smoke, while NO2-to-HONO heterogeneous conversion contributes 85 %–95 % to total HONO production, followed by OH + NO (5 %–15 %). At nighttime, heterogeneous reduction of NO2 catalyzed by redox active species (e.g., iron oxide and/or quinone) is essential (≥ 75 %) for HONO production in addition to surface NO2 hydrolysis. Additionally, the 18O / 16O of HONO is used for the first time to constrain the NO-to-NO2 oxidation branching ratio between ozone and peroxy radicals. Our approach provides a new and critical way to mechanistically constrain atmospheric chemistry and/or air quality models on a diurnal timescale
Intersections of Epigenetics, Twinning and Developmental Asymmetries: Insights Into Monogenic and Complex Diseases and a Role for 3D Facial Analysis
Single Nucleotide Polymorphisms That Increase Expression of the Guanosine Triphosphatase RAC1 Are Associated With Ulcerative Colitis
BACKGROUND & AIMS: RAC1 is a GTPase that has an evolutionarily conserved role in coordinating immune defenses, from plants to mammals. Chronic inflammatory bowel diseases (IBD) are associated with dysregulation of immune defenses. We studied the role of RAC1 in IBD using human genetic and functional studies and animal models of colitis. METHODS: We used a candidate gene approach to HapMap-Tag single nucleotide polymorphisms (SNPs) in a discovery cohort; findings were confirmed in 2 additional cohorts. RAC1 mRNA expression was examined from peripheral blood cells of patients. Colitis was induced in mice with conditional disruption of Rac1 in phagocytes by administration of dextran sulphate sodium (DSS). RESULTS: We observed a genetic association between RAC1 with ulcerative colitis (UC) in a discovery cohort, 2 independent replication cohorts, and in combined analysis for the SNPs rs10951982 (Pcombined UC = 3.3 × 10–8, odds ratio [OR]=1.43 [1.26–1.63]) and rs4720672 (Pcombined UC=4.7 × 10–6, OR=1.36 [1.19–1.58]). Patients with IBD who had the rs10951982 risk allele had increased expression of RAC1, compared to those without this allele. Conditional disruption of Rac1 in macrophage and neutrophils of mice protected them against DSS-induced colitis. CONCLUSION: Studies of human tissue samples and knockout mice demonstrated a role for the GTPase RAC1 in the development of UC; increased expression of RAC1 was associated with susceptibility to colitis
Sylvatic infestation of Oklahoma reptiles with immature Ixodes scapularis (Acari: Ixodidae)
Reptiles were collected in nine counties in Oklahoma from September 2002 to May 2004 and examined for Ixodes scapularis (Say) larvae and nymphs to determine seasonal incidence and prevalence of these ticks. In total, 209 reptile specimens consisting of nine species of lizards and seven species of snakes were collected. Plestiodon fasciatus (L.) was the most numerous species collected (55%) followed by Sceloporus undulatus (Latreille) (17%) and Scincella lateralis (Say) (11%). Less than 10 individuals were collected for all remaining reptile species. The infestation prevalence of I. scapularis on all reptile specimens collected was 14% for larvae and 25% for nymphs. Larvae were found on lizards from April until September and peaked in May, while nymphs were found from March until September and peaked in April. I. scapularis larvae (84%) and nymphs (73%) preferentially attached to the axillae/front leg of P. fasciatus. Two chigger species, Eutrombicula splendens (Ewing) and Eutrombicula cinnabaris (Ewing), were found on 2% of the reptiles collected. No ectoparasites, including ticks, were obtained from the seven species of snakes collected.Peer reviewedEntomology and Plant Patholog
Linkage to chromosome 2q32.2-q33.3 in familial serrated neoplasia (Jass syndrome)
Causative genetic variants have to date been identified for only a small proportion of familial colorectal cancer (CRC). While conditions such as Familial Adenomatous Polyposis and Lynch syndrome have well defined genetic causes, the search for variants underlying the remainder of familial CRC is plagued by genetic heterogeneity. The recent identification of families with a heritable predisposition to malignancies arising through the serrated pathway (familial serrated neoplasia or Jass syndrome) provides an opportunity to study a subset of familial CRC in which heterogeneity may be greatly reduced. A genome-wide linkage screen was performed on a large family displaying a dominantly-inherited predisposition to serrated neoplasia genotyped using the Affymetrix GeneChip Human Mapping 10 K SNP Array. Parametric and nonparametric analyses were performed and resulting regions of interest, as well as previously reported CRC susceptibility loci at 3q22, 7q31 and 9q22, were followed up by finemapping in 10 serrated neoplasia families. Genome-wide linkage analysis revealed regions of interest at 2p25.2-p25.1, 2q24.3-q37.1 and 8p21.2-q12.1. Finemapping linkage and haplotype analyses identified 2q32.2-q33.3 as the region most likely to harbour linkage, with heterogeneity logarithm of the odds (HLOD) 2.09 and nonparametric linkage (NPL) score 2.36 (P = 0.004). Five primary candidate genes (CFLAR, CASP10, CASP8, FZD7 and BMPR2) were sequenced and no segregating variants identified. There was no evidence of linkage to previously reported loci on chromosomes 3, 7 and 9
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