Herbicide Evaluation in Arkansas Rice, 1997

Weed control is economically important for production of rice, a major crop in Arkansas. These findings summarize efforts of the team of Arkansas scientists working on weed control strategies for rice during 1997. Various technologies were evaluated in field studies at five locations involving the major weed problems and rice production systems used in the state. Results from these studies will add to the arsenal of weed control options for producers. Highlights include synergists and safeners for herbicides to aid in control of propanil-resistant barnyardgrass; herbicides and flooding techniques for control of red rice and other weeds; and the use of transgenic rice cultivars for broadspectrum weed control. The preliminary results reported here generally warrant further testing for more advanced findings and for the labeling of new technologies, and finally are the basis for updating safe, effective, and economical recommendations to Arkansas rice producers

MACROMOLECULAR AND AROMATIC CHARACTER INFLUENCE OF SBR ON THE RHEOLOGICAL PROPERTIES OF WELL CEMENT SLURRIES

Ensuring the rheological properties of the latex-based cement slurries in steam EOR is indispensable. Ca(OH)2 is produced after cement/water reaction and the macromolecules tend to disturb the hydration process, after the latex demulsification, by covering the cement particle. The free water decreases due to the high hydrophilicity of demulsified SBR, where final gel values increased up to 67%. The slump diameter was decreased exponentially by increasing the latex content limiting the workability. SBR-modified slurries presented a Pseudoplastic non-Newtonian flow behavior and the plastic viscosity decreases gradually, while the yield stress values registered a progressive increment by adding SBR till 10%

Comorbidity in eating and psychological disorders and its clinical implications

We briefly reviewed the clinical studies of comorbidity in eating disorders. general aspects of the treatment in these situations are discussed.Os autores revisam, de maneira breve, os estudos clínicos sobre comorbidade em transtornos alimentares. Aspectos gerais do tratamento nessas situações são discutidos

Experimental Validation: Subscale Aircraft Ground Facilities and Integrated Test Capability

Experimental testing is an important aspect of validating complex integrated safety critical aircraft technologies. The Airborne Subscale Transport Aircraft Research (AirSTAR) Testbed is being developed at NASA Langley to validate technologies under conditions that cannot be flight validated with full-scale vehicles. The AirSTAR capability comprises a series of flying sub-scale models, associated ground-support equipment, and a base research station at NASA Langley. The subscale model capability utilizes a generic 5.5% scaled transport class vehicle known as the Generic Transport Model (GTM). The AirSTAR Ground Facilities encompass the hardware and software infrastructure necessary to provide comprehensive support services for the GTM testbed. The ground facilities support remote piloting of the GTM aircraft, and include all subsystems required for data/video telemetry, experimental flight control algorithm implementation and evaluation, GTM simulation, data recording/archiving, and audio communications. The ground facilities include a self-contained, motorized vehicle serving as a mobile research command/operations center, capable of deployment to remote sites when conducting GTM flight experiments. The ground facilities also include a laboratory based at NASA LaRC providing near identical capabilities as the mobile command/operations center, as well as the capability to receive data/video/audio from, and send data/audio to the mobile command/operations center during GTM flight experiments

Herbicide Evaluation in Arkansas Rice, 1998

Weed control is economically important for production of rice, a major crop in Arkansas. These findings summarize efforts of the team of Arkansas scientists working on weed control strategies for rice during 1998. Various technologies were evaluated in field studies involving the major weed problems and rice production systems used in the state. Results from these studies will add to the arsenal of weed control options for producers. The preliminary results reported here generally warrant further testing for more advanced findings and for the labeling of new technologies and, finally, are the basis for updating safe, effective, and economical recommendations to Arkansas rice producers

Vulnerability-based spatial sampling stratification for the National Children\u27s Study, Worcester County, Massachusetts: capturing health-relevant environmental and sociodemographic variability

BACKGROUND: The National Children\u27s Study is the most ambitious study ever attempted in the United States to assess how environmental factors impact child health and development. It aims to follow 100,000 children from gestation until 21 years of age. Success requires breaking new interdisciplinary ground, starting with how to select the sample of \u3e 1,000 children in each of 105 study sites; no standardized protocol exists for stratification of the target population by factoring in the diverse environments it inhabits. Worcester County, Massachusetts, like other sites, stratifies according to local conditions and local knowledge, subject to probability sampling rules. OBJECTIVES: We answer the following questions: How do we divide Worcester County into viable strata that represent its health-relevant environmental and sociodemographic heterogeneity, subject to sampling rules? What potential does our approach have to inform stratification at other sites? RESULTS: We developed a multivariable, vulnerability-based method for spatial sampling consisting of two descriptive indices: a hazards/stressors exposure index (comprising three proxy variables), and an adaptive capacity/sociodemographic character index (five variables). Multivariable, health-relevant stratification at the start of the study may improve detection power for environment-child health associations down the line. Eighteen strata capture countywide heterogeneity in the indices and have optimal relative homogeneity within each. They achieve comparable expected birth counts and conform to local concepts of space. CONCLUSION: The approach offers moderate to high potential to inform other sites, limited by intersite differences in data availability, geodemographics, and technical capacity. Energetic community engagement from the start promotes local stratification coherence, plus vital researcher-community trust and co-ownership for sustainability

Dexamethasone and Basic‐Fibroblast Growth Factor Regulate Markers of Mineralization in Cementoblasts In Vitro

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/142252/1/jper1550.pd

ESTABILIDADE E ADAPTABILIDADE DE LINHAGENS E CULTIVARES DE FEIJÃO DO GRUPO CARIOCA

The common bean has been cultivated under different environmental conditions and technology levels. These environmental variations, linked to genotypes differences and interaction between genotypes and environments are the main reasons for those yield variations. The interaction genotype by environments has been a challenge for indication of cultivars and to select lines in breeding programs as well. The objective of this work was to evaluate the stability and adaptability of grain yield in 14 genotypes of carioca bean, studied in ten experiments of Cultivate Value and Using, carried out during agricultural years of 2000/01 and 2001/02. The experimental design utilized was the randomized blocks with four repetitions. The stability and adaptability were evaluated by non-parametric, bi-segmented and simple linear regression methodologies. The results demonstrated a concordance among methodologies for genotypes indications with exception for recommendation in unfavorable environments. The ideal genotype was not found by bi-segmented linear regression. The lines Vi 4899, Vi 0699 and Vi 4599 showed adaptability to general environments, and with LP 97-28 were indicated to unfavorable environments. In favorable environments Vi 4899, FT 97-155 and FTS Magnífico showed the better performances.O feijão é cultivado sob diferentes condições de ambientes e níveis tecnológicos. Estas diferenças aliadas às diferenças entre genótipos e à interação entre genótipos e ambientes são as principais responsáveis pelas variações nas produtividades. A interação genótipo por ambientes tem sido um desfio para a indicação de cultivares e para a seleção de linhagens nos programas de melhoramento. O objetivo deste trabalho foi avaliar a estabilidade e a adaptabilidade da produtividade de grãos de 14 genótipos de feijão carioca, avaliados em dez ensaios de Valor de Cultivo e Uso (VCU), conduzidos nos anos agrícolas 2000/01 e 2001/02. O delineamento utilizado foi de blocos casualizados, com quatro repetições. A estabilidade e a adaptabilidade foi avaliada por uma metodologia não paramétrica, e metodologias baseadas em regressão linear bissegmentada e linear simples. Os resultados demonstraram que houve concordância entre metodologias na indicação de genótipos, a exceção da recomendação para ambientes desfavoráveis. O genótipo ideal, considerando os parâmetros da regressão bissegmentada para ambientes favoráveis não foi encontrado. Entre os genótipos avaliados destacaram-se especialmente as linhagens Vi 4899, Vi 0699 e Vi 4599, apresentando, de forma geral, melhor produtividade, adaptabilidade e previsibilidade. As linhagens Vi 4899, Vi 0699 e Vi 4599 apresentaram adaptabilidade à ambientes gerais e também foram indicadas junto com LP 97-28 para ambientes desfavoráveis. Em ambientes favoráveis, Vi 4899, FT 97-155 e FTS Magnífico apresentaram as melhores performances

Studies of the laser-induced fluorescence of explosives and explosive compositions.

Continuing use of explosives by terrorists throughout the world has led to great interest in explosives detection technology, especially in technologies that have potential for standoff detection. This LDRD was undertaken in order to investigate the possible detection of explosive particulates at safe standoff distances in an attempt to identify vehicles that might contain large vehicle bombs (LVBs). The explosives investigated have included the common homogeneous or molecular explosives, 2,4,6-trinitrotoluene (TNT), pentaerythritol tetranitrate (PETN), cyclonite or hexogen (RDX), octogen (HMX), and the heterogeneous explosive, ammonium nitrate/fuel oil (ANFO), and its components. We have investigated standard excited/dispersed fluorescence, laser-excited prompt and delayed dispersed fluorescence using excitation wavelengths of 266 and 355 nm, the effects of polarization of the laser excitation light, and fluorescence imaging microscopy using 365- and 470-nm excitation. The four nitro-based, homogeneous explosives (TNT, PETN, RDX, and HMX) exhibit virtually no native fluorescence, but do exhibit quenching effects of varying magnitude when adsorbed on fluorescing surfaces. Ammonium nitrate and fuel oil mixtures fluoresce primarily due to the fuel oil, and, in some cases, due to the presence of hydrophobic coatings on ammonium nitrate prill or impurities in the ammonium nitrate itself. Pure ammonium nitrate shows no detectable fluorescence. These results are of scientific interest, but they provide little hope for the use of UV-excited fluorescence as a technique to perform safe standoff detection of adsorbed explosive particulates under real-world conditions with a useful degree of reliability