Spectroscopic characterizations of the mixed Langmuir-Blodgett (LB) films of 2,2'-biquinoline molecules: evidence of dimer formation

This communication reports the -A isotherms and spectroscopic characterizations of mixed Langmuir and Langmuir-Blodgett (LB) films of nonamphiphilic 2, -biquinoline (BQ) molecules, mixed with polymethyl methacrylate (PMMA) and stearic acid (SA). The pi-A isotherms and molefraction versus area per molecule studies indicate complete immiscibility of sample (BQ) and matrix (PMMA or SA) molecules. This immiscibility may lead to the formation of microcrystalline aggregates of BQ molecules in the mixed LB films. The scanning electron micrograph gives the visual evidence of microcrystalline aggregates of BQ molecules in the mixed LB films. UV-Vis absorption, fluorescence and excitation spectroscopic studies reveal the nature of these microcrystalline aggregates. LB films lifted at higher surface pressure indicate the formation of dimer or higher order n-mers.Comment: 21 pages, 5 figure

Proceedings of the 31st Annual Meeting, Southern Soybean Disease Workers (February 15-16, 2004, St. Louis, Missouri)

Contents Southern United States Soybean Disease Loss Estimate for 2003. Compiled by Stephen R. Koenning Shifts in Soybean Disease Incidence and Severity Following Adaptation of the ESPS (Early Soybean Productions system) in Mississippi. GL Sciumbato and DH Poston Impact of Foliar Fungicides on Soybean Yield and Net Returns. BL Spinks, DH Poston, GL Sciumbato, and MA Blaine Inheritance of Resistance to Phompsis Seed Decay in Soybean PI 80837. EW Jackson, P Fenn, P Chen, and PK Miller Inheritance of Resistance to Purple Seed Stain in Soybean PI 80837. EW Jackson, P Fenn, P Chen, PK Miller Population Structure of Cercospora kikuchii as Assessed with Vegetative Compatibility Groups and DNA Fingerprints. Guohong Cai and Raymond W Schneider Reniform Nematode Reproduction on Soybean in 2003 Tests. RT Robbins, L Rakes, LE Jackson, EE Gbur, and DG Dombek Proceedings of the Southern Soybean Disease Workers are published annually by the Southern Soybean Disease Workers. Text, references, figures, and tables are reproduced as they were submitted by authors. The opinions expressed by the participants at this conference are their own and do not necessarily represent those of the Southern Soybean Workers. Mention of a trademark or proprietary products in this publication does not constitute a guarantee, warranty, or endorsement of that product by the Southern Soybean Disease Workers

Proceedings of the 32nd Annual Meeting, Southern Soybean Disease Workers (March 2-3, 2005, Scottsdale, Arizona)

Contents Southern Soybean Disease Workers 2004 treasury report Southern United States Soybean Disease Loss Estimates for 2004. Compiled by SR Koenning Initial Discovery of Asian Soybean Rust in Louisiana in 2004 and Lessons for 2005. RW Schneider, CA Hollier, and HK Wbitam Efficacy of myclobutanil for control of Asian soybean rust in Brazil (2004). MT Iarnauti, NA Alvarenga, JA Rosseto, GR Tofoli, BD Olson, DG Ouimette, and DC Ruen. Flutriafol - a triazole fungicide giving strong curative action and persistence of effect against Asian soybean rust. T Baker and R Noon Cherninova Experience in Use of Syngenta Fungicides for Controlling Soybean Rust in Brazil and Expectations for the US. A Tally, E Guicherit, and S Paiva The Role of Forecasting Long Distance Spore Movement in Managing the Potential 2005 Soybean Rust Epidemic. CE Main, T Keever, SR Koenning, G Holmes, and R Magarey The Role of the National Plant Diagnostic Network Laboratories in Asian Soybean Rust Diagnosis. CL Harmon Impact ofQuadris® Plus Warrior®Tank Mix on Soybean Yield in Kentucky. DE Hershman, DW Johnson, and JH Herbek Evaluation of Soybean Varieties and Germplasm Lines to Soil Water-logging. JG Shannon, G Stevens, and WJ Wiebold Replacing Races: Adaptation of the Soybean Cyst Nematode HG Type Test for Practical Applications. TL Niblack, GR Noel, and JP Bond Fungicide Efficacy and Application Timing for Control of Frogeye Leaf Spot of Soybean caused by Cercospora sojina. MA Newman, W Percell, and W Crowder Characterization of Cercospora sojina Isolates and Germplasm Evaluation. AK Gregor, CM Vick, JP Bond, ME Schmidt, JA Wrather, and JG Shannon Integration of Soybean. Rust Control into a Late Season Foliar Fungicide Program. GL Sciumbato, DH Poston, WF Moore, BL Spinks, and MA Blaine Simulation of Spore Trajectories to Identify Potential Pathways of Soybean Rust in the Continental US. KS Kim, Z Pan, and XB Yang Periods from initial infection to detectable levels of soybean rust in early stages of disease development. X Li, AP Dias, XB Yang Analysis of Regional Onset of Asian Soybean Rust Outbreaks In South America. ED Ponte and XB Yang A Critical Monthly Rainfall Model for Prediction of Asian Soybean Rust Outbreaks. ED Ponte, X Li, and XB Yang A 2-Year Study of Foliar Fungicides in Mississippi Soybeans. BL Spinks, DH Poston, GL Sciumbato, and MA Blaine Proceedings of the Southern Soybean Disease Workers are published annually by the Southern Soybean Disease Workers. Text, references, figures, and tables are reproduced as they were submitted by authors. The opinions expressed by the participants at this conference are their own and do not necessarily represent those of the Southern Soybean Disease Workers. Mention of a trademark or proprietary products in this publication does not constitute a guarantee, warranty, or endorsement of that product by the Southern Soybean Disease Workers

A Search for the Damped Ly-alpha Absorber at z=1.86 toward QSO 1244+3443 with NICMOS

We have carried out a high-resolution imaging search for the galaxy associated with the damped Lyman-alpha (DLA) absorber at z=1.859 toward the z_{em}=2.48 quasar QSO 1244+3443, using the HST and the NICMOS. Images were obtained in the broad filter F160W and the narrow filter F187N with camera 2 on NICMOS with the goal of detecting the rest-frame optical continuum and the H-alpha line emission from the DLA. After PSF subtraction, two weak features are seen at projected separations of 0.16-0.24" from the quasar. Parts of these features may be associated with the DLA absorber, although we cannot completely rule out that they could be artifacts of the point spread function (PSF). If associated with the DLA, the objects would be ~1-2 h_{70}^{-1} kpc in size with integrated flux densities of 2.5 and 3.3 mu Jy in the F160W filter, implying luminosities at lambda_{central}=5600 A in the DLA rest frame of 4.4-5.9 x 10^{9} h_{70}^{-2} L_{solar} at z=1.86, for q0=0.5. However, no significant H-alpha line emission is seen from these objects, suggesting low star formation rates (SFRs). Our 3 sigma upper limit on the SFR in the DLA is 1.3 h_{70}^{-2} M_{solar}/yr for q0 = 0.5 (2.4 h_{70}^{-2} M_{solar} yr^{-1} for q0 = 0.1). This together with our earlier result for LBQS 1210+1731 mark a significant improvement over previous constraints on the star formation rates of DLAs. A combination of low SFR and some dust extinction is likely to be responsible for the lack of H-alpha emission. Alternatively, the objects, may be associated with the quasar host galaxy. In any case, our observations suggest that the DLA is not a large bright proto-disk, but a compact object or a low-surface brightness galaxy. If the two features are PSF artifacts then the constraints on DLA properties are even more severe.Comment: 28 pages, 9 figures. Accepted for publication in The Astrophysical Journal. Figures are given at a slightly lower resolution here, to decrease file sizes. The higher resolution versions can be found in the Ap

Proceedings of the 33rd Annual Meeting, Southern Soybean Disease Workers (March 8-9, 2006, Jackson, Tennessee)

Contents Southern Soybean Disease Workers 2005 treasury report Southern United States Soybean Disease Loss Estimates for 2005. Compiled by SR Koenning Virulence in Phytopbthora sojae Isolates to Soybeans with Rps8 Resistance. DA Smith, TS Abney, and JG Shannon New Sources of Resistance to SCN in Soybean. PR Arelli Soybean Disease Management in Louisiana. B Padgett, MA Purvis, and BW Garber Efficacy and Profitability of Foliar Fungicide in the Absence of Soybean Rust. M Newman and W Percell Fungicide and Insecticide Combinations for Enhancing Soybean Health and Yield. RP Mulrooney and RW Taylor Overview of Soybean Rust Monitoring in the US. JC Rupe Yield Enhancement of Probable Asian Soybean Rust Control Fungicides. JB Blessitt, DH Poston, GL Sciumbato, CH Koger, and N Buehring Occurrence of Disease and Insect Pests in Select Sorghum and Soybean Rotations in Mississippi. ST Pichardo, RE Baird, and HN Pitre A Preliminary Evaluation of Spore Trapping Technology for Phakopsora pachyrhizi. EP Mumma, RW Schneider, CL Robertson, CG Giles, JJ Marois, and DL Wright Influence of Host Genotype and Soybean Cyst Nematode on Charcoal Rot of Soybean. TM Dorton, JP Bond, ME Schmidt, CM Vick, and AK Gregor Comparison of Disease Assessments of Soybean Genotypes in the Presence of Charcoal Rot. A Mengistu, RL Paris, JR Smith, and JD Ray Twenty Years of Soybean Variety Testing for SDS. C Schmidt, J Klein, M Schmidt, and J Bond SCN-Resistant Soybeans Offer a False Sense of Security to Producers. R Heinz, LE Sweets, and MG Mitchum Roundup Ready and Conventional Soybeans with Broad Resistance to SCN HG Types. JG Shannon, JA Wrather, DA Sleper, HT Nguyen, and SC Anand A Review ofReniform Nematode Resistance on Soybean. RT Robbins Effect of Seed Treatments on Soybean Stand and Yield in Arkansas, 2005. JC Rupe, CS Rothrock, TL Kirkpatrick, ML Rosso, and AJ Steger Inheritance of Resistance to Phomopsis Seed Decay in Soybean PI 360841. SE Smith, P Fenn, PK Miller, and P Chen Proceedings of the Southern Soybean Disease Workers are published annually by the Southern Soybean Disease Workers. Text, references, figures, and tables are reproduced as they were submitted by authors. The opinions expressed by the participants at this conference are their own and do not necessarily represent those of the Southern Soybean Disease Workers. Mention of a trademark or proprietary products in this publication does not constitute a guarantee, warranty, or endorsement of that product by the Southern Soybean Disease Workers