Development of a High throughput Surfactant Screening Procedure using Shikimic Acid Analysis

In field efficacy trials most glyphosate/surfactant combinations tested control barnyardgrass as well as preormulated glyphosate products 21 days after treatment (DAT). Preormulated glyphosate products controlled barnyardgrass quicker than combination treatments, most likely due to improved glyphosate formulations with improved surfactant systems. In greenhouse trials, preormulated glyphosate products exhibited greater fresh weight reductions across all species tested, including barnyardgrass, broadleaf signalgrass, hemp sesbania, johnsongrass, large crabgrass, pitted morningglory, prickly sida, sicklepod, yellow foxtail and Palmer amaranth. Nonionic tallow amine treatments exhibited variable control among species. A shikimate analysis was developed using non-glyphosate-tolerant soybean to estimate efficacy of surfactants; data were then correlated to the visual efficacy data on barnyardgrass in the field. However, there was not sufficient variability in barnyardgrass control to use the shikimate analysis as a predictor

Constructing the Space for Professional Action: A Case Study of Professionalism in Education

This research seeks to understand the perceptions of professionalism in education. In particular it focuses on the constructions of the space for professional action. A case study focuses on people, including teachers and non-teachers, who work in a special school for young people with SEBD. The perceptions of professionalism in education held by those in this case have been carefully listened to and analysed. Using an interpretive approach I have analysed data from interviews of members of the case. This reveals that a common language is used to describe professionalism but this is not commonly defined. There is an assumption that all share a common definition. In addition, other factors affect professional action. The experiences and life trajectories of the respondents are seen to colour and shape professional action. The construction of the space for professional action is problematic. There is a wide range of definition. The findings reveal that professionalism is complex and common language hides a wide spectrum of definition and meaning. Professionalism, as a concept, is often confused and misused. Foregrounding these confusions have contributed to the understanding of professionalism. There is tension between the constructions of professionalism. The person trying to enact professionalism in education has to interpret, sometimes incongruent, discourses and locate themselves within persuasive discourses. Awareness of these differences and tensions can help understand and allow them to make their own choices. The development of typologies as an analysis tool has been effective in understanding the space for professional action in this case. It is suggested that this might be used as a basis for professional discussion for others who are engaging in development in their own context. Professionalism in education is important as this impacts on the performance of each person and this performance effects the young people. It is argued that people trying to enact it should engage in professional discussion and agreement making to establish what is good and worthwhile in professionalism

The COBLAMED satellite buoy experiment: A measure of small scale horizontal variability in the upper layer

A satellite buoy experiment, which was conducted during COBLAMED in the Western Mediterranean, consisted of a thermistor buoy tethered to an identical moored buoy in a mean current at separation distances of 100 and 400 m in order to observe the dependence of small scale variability upon internal waves and advection and to register time and depth variability of horizontal coherence. The two 18-hour records showed distinct warm and cold pulses which traversed the separations with the mean current and preserved their shapes...

Mind your Language: Discursive Practices Produce Unequal Power and Control Over Infectious Disease: A Critical Discourse Analysis

A review of how the language use to describe noncommunicable disease create heroes and vilians and maginalise the economic south populations.Abstract Background: Power, socioeconomic inequalities, and poverty are recognized as some of the fundamental determinants of differences in vulnerability of societies to infectious disease threats. The economic south is carrying a higher burden than those in the economic north. This raises questions about whether social preventions and biomedical preventions for infectious disease are given equal consideration, and about social institutions and structures that frame the debate about infectious disease. This article examines how institutionalized ways of talking about infectious disease reinforces, creates, and sustains health inequalities. Methodology: Critical discourse analysis was considered to be epistemologically and ontologically consistent with the aims and context of this study. Results: The study examined three types of infectious disease: • Emerging infectious diseases/pathogens • Neglected tropical diseases • Vector-borne infections. Examination revealed that poverty is the most common determinant of all three. Conclusion: A sustainable reduction in infectious disease in the southern countries is most likely to be achieved through tackling socioeconomic determinants. There is a need for a change in the discourse on infectious disease, and adopt a discourse that promotes self-determination, rather than one that reinforces the hero-victim scenario and power inequalities. Keyword: Critical discourse, inequalities, infectious disease, poverty, powe

Turbulence measurements in a tidal current.

Massachusetts Institute of Technology. Dept. of Meteorology. Thesis. 1967. M.S.Bibliography: leaves 30-31.M.S

Thiothymidine plus low-dose UVA kills hyperproliferativehuman skin cells independently of their human papilloma virus status

The thymidine analogue 4-thiothymidine (S4TdR) is a photosensitizer for UVA radiation. The UV absorbance spectrum of S4TdR and its incorporation into DNA suggests that it might act synergistically with nonlethal doses of UVA to selectively kill hyperproliferative or cancerous skin cells. We show here that nontoxic concentrations of S4TdR combine with nonlethal doses of UVA to kill proliferating cultured skin cells. Established cell lines with a high fraction of proliferating cells were more sensitive than primary keratinocytes or fibroblasts to apoptosis induction by S4TdR/UVA. Although S4TdR plus UVA treatment induces stabilization of p53, cell death, as measured by apoptosis or clonal survival, occurs to a similar extent in both p53 wild-type and p53-null backgrounds. Furthermore, different types of human papilloma virus E6 proteins, which protect against UVB-induced apoptosis, have little effect on killing by S4TdR/UVA. S4TdR/UVA offers a possible therapeutic intervention strategy that seems to be applicable to human papilloma virus–associated skin lesions

The Perspective of Socioeconomic Inequalities and Infectious Disease in 21st Century

At the turn of the new century, the United Nations set a series of global health goals to be achieved by 2015. Amongst the eight Millennium Development Goals (MDGs), goal six aimed to combat HIV, malaria and other diseases

A kinematic study of planetary nebulae in the dwarf irregular galaxy IC10

We present positions, kinematics, and the planetary nebula luminosity function (PNLF) for 35 planetary nebulae (PNe) in the nearest starburst galaxy IC10 extending out to 3kpc from the galaxy's centre. We take advantage of the deep imaging and spectroscopic capabilities provided by the spectrograph FOCAS on the 8.2m Subaru telescope. The PN velocities were measured through the slitless-spectroscopy technique, which allows us to explore the kinematics of IC10 with high precision. Using these velocities, we conclude that there is a kinematic connection between the HI envelope located around IC10 and the galaxy's PN population. By assuming that the PNe in the central regions and in the outskirts have similar ages, our results put strong observational constraints on the past tidal interactions in the Local Group. This is so because by dating the PN central stars, we, therefore, infer the epoch of a major episode of star formation likely linked to the first encounter of the HI extended envelope with the galaxy. Our deep [OIII] images also allow us to use the PNLF to estimate a distance modulus of 24.1+/-0.25, which is in agreement with recent results in the literature based on other techniques.Comment: 10 pages, 9 figures, 2 tables. Accepted for publication in MNRA

Diagnosing space telescope misalignment and jitter using stellar images

Accurate knowledge of the telescope's point spread function (PSF) is essential for the weak gravitational lensing measurements that hold great promise for cosmological constraints. For space telescopes, the PSF may vary with time due to thermal drifts in the telescope structure, and/or due to jitter in the spacecraft pointing (ground-based telescopes have additional sources of variation). We describe and simulate a procedure for using the images of the stars in each exposure to determine the misalignment and jitter parameters, and reconstruct the PSF at any point in that exposure's field of view. The simulation uses the design of the SNAP (http://snap.lbl.gov) telescope. Stellar-image data in a typical exposure determines secondary-mirror positions as precisely as $20 {\rm nm}$. The PSF ellipticities and size, which are the quantities of interest for weak lensing are determined to $4.0 \times 10^{-4}$ and $2.2 \times 10^{-4}$ accuracies respectively in each exposure, sufficient to meet weak-lensing requirements. We show that, for the case of a space telescope, the PSF estimation errors scale inversely with the square root of the total number of photons collected from all the usable stars in the exposure.Comment: 20 pages, 6 figs, submitted to PAS

Below-cost legislation: lessons from the Republic of Ireland

This paper traces the emergence, evolution, and demise of below cost legislation in the grocery industry in the republic of Ireland. The paper adds to our understanding of the legislation by adopting the view that, by using the net invoice price as its definition of cost, the legislation increased two streams of quasi-rents, first on suppliers’ brandeds and second on retailers’ own brands which acted to depress competitive forces and direct supplier-buyer negotiations to off-invoice discounts. Supplier generated quasi-rents financed discounts, and when coupled with retailers’ higher margins on their own brands, provided little incentive for a return to a price competitive environment. Two factors undermined this situation: the substitution of discounters’ products for suppliers’ brands as the discounters share of the market grew and the increase in cross border shopping. These had the combined effect of reducing the available quasi-rents earned in the Irish market resulting in the breakdown of the status quo and a return to price competition. Through its impact on negotiations, the legislation also introduced inefficiencies to both retailers’ and suppliers businesses representing additional waste that could have been more productively used to reduce consumer prices. The paper endorses the Government’s decision to rescind the order and remove an important constraint on both vertical and horizontal competition. Lessons from the Republic of Ireland suggest that the competitive response to the removal of below cost legislation, and reductions in prices, may take time and will depend on economic circumstances and a change in the prevailing norms of organizational behaviour and quasi-rent seeking opportunitie