The evaluation of urea as a nitrogen fertilizer on wheat

Nitrogen fertilization has become an important farming practice in the past seventy-five years. During the latter part of the nineteenth Century the use of sodium nitrate increased rapidl in Europe and America (3). Shortly after 1893 ammonium sulfate, a by-product of the coke industry, appeared on the American market. Urea, imported from Germany, was used to a limited extent from 1924 to 1936, primarily in the preparation of commercial, mixed fertilizers. A product having the name Urason was placed on the market in 1938. It consisted of urea treated with cocoa shell meal rock phosphate dust which coated the individual particles. Since World War II the production of nitrogen fertilizers has increased rapidly, and today there are many products available including urea fertilizers which have appeared under trade names such as Floranid, Urear, Calsi-Urear, and Agramon (15). While some studies have been made of urea as a nitrogen fertilizer, there is much to be learned of its behavior in soils and its relative efficiency under different soil and crop conditions. The purposes of this investigation have been: (1) To evaluate urea as a nitrogen fertilizer on wheat under several soil conditions in Tennessee, and (2) To determine rates of urea conversion to ammonia and nitrate and to determine the influence of certain factors which affect this conversion

Press Conference - Senator Edmund S. Muskie Endorsed by Senators Eagleton and Symington and Governor Hearnes

Press conference following the announcement of the endorsement of Senator Edmund S. Muskie for the Democratic nomination in 1972 by Governor Hearnes, and Senators Symington and Eagleton

Comparison of indirect radiation dose estimates with directly measured radiation dose for patients and operators during complex endovascular procedures

BackgroundA great deal of attention has been directed at the necessity and potential for deleterious outcomes as a result of radiation exposure during diagnostic evaluations and interventional procedures. We embarked on this study in an attempt to accurately determine the amount of radiation exposure given to patients undergoing complex endovascular aortic repair. These measured doses were then correlated with radiation dose estimates provided by the imaging equipment manufacturers that are typically used for documentation and analysis of radiation-induced risk.MethodsConsecutive patients undergoing endovascular thoracoabdominal aneurysm (eTAAA) repair were prospectively studied with respect to radiation dose. Indirect parameters as cumulative air kerma (CAK), kerma area product (KAP), and fluoroscopy time (FT) were recorded concurrently with direct measurements of dose (peak skin dose [PSD]) and radiation exposure patterns using radiochromatic film placed in the back of the patient during the procedure. Simultaneously, operator exposure was determined using high-sensitivity electronic dosimeters. Correlation between the indirect and direct parameters was calculated. The observed radiation exposure pattern was reproduced in phantoms with over 200 dosimeters located in mock organs, and effective dose has been calculated in an in vitro study. Scatter plots were used to evaluate the relationship between continuous variables and Pearson coefficients.ResultseTAAA repair was performed in 54 patients over 5 months, of which 47 had the repair limited to the thoracoabdominal segment. Clinical follow-up was complete in 98% of the patients. No patients had evidence of radiation-induced skin injury. CAK exceeded 15 Gy in 3 patients (the Joint Commission on Accreditation of Healthcare Organizations [JCAHO] threshold for sentinel events); however, the direct measurements were well below 15 Gy in all patients. PSD was measured by quantifying the exposure of the radiochromatic film. PSD correlated weakly with FT but better with CAK and KAP (r = 0.55, 0.80, and 0.76, respectively). The following formula provides the best estimate of actual PSD = 0.677 + 0.257 CAK. The average effective dose was 119.68 mSv (for type II or III eTAAA) and 76.46 mSv (type IV eTAAA). The operator effective dose averaged 0.17 mSv/case and correlated best with the KAP (r = 0.82, P < .0001).ConclusionFT cannot be used to estimate PSD, and CAK and KAP represent poor surrogate markers for JCAHO-defined sentinel events. Even when directly measured PSDs were used, there was a poor correlation with clinical event (no skin injuries with an average PSD >2 Gy). The effective radiation dose of an eTAAA is equivalent to two preoperative computed tomography scans. The maximal operator exposure is 50 mSv/year, thus, a single operator could perform up to 294 eTAAA procedures annually before reaching the recommended maximum operator dose

Spectatorship and the new (critical) sincerity: the case of Forced Entertainment’s Tomorrow’s Parties

This article considers Forced Entertainment’s Tomorrow Parties (2011) as an example of the New Sincerity – an aesthetic mode that has emerged in the wake of postmodernism, particularly visible in contemporary American fiction. The particular contribution here is the trans-disciplinary shift from fiction to theatre studies as the New Sincerity – as theorised by American fiction scholars via Lionel Trilling’s Sincerity and Authenticity (1972) and David Foster Wallace’s essay ‘E Unibus Pluram: Television and U.S. Fiction’ (1993) – is assessed in terms of its applicability to the specificities of theatre performance. A trusting and trusted spectator is central to the operational practice of sincerity in performance. In many ways Tomorrow’s Parties succeeds in interpellating such a spectator; however, it remains a piece performed by an experimental theatre company renowned for engaging in metatheatrical innovation, immersive practice and ironic game playing, all of which haunt this particular postdramatic performance. To account for this troubling of sincerity – and all performance is on one level insincere – the term ‘critical sincerity’ is coined, a term that describes the knowingness that certain theatre pieces – like Tomorrow’s Parties – exhibit of the inherent insincerity of performance, while simultaneously striving for a sincere encounter

The Consumption, Production and Regulation of Alcohol in the UK: The Relevance of the Ambivalence of the Carnivalesque

Alcohol consumption in 21st-century Britain is of significant interest to government, media and academics. Some have referred to a ‘new culture of intoxication’ or ‘calculated hedonism’, fostered by the drinks industry, and enabled by a neoliberal policymaking context. This article argues that the ‘carnivalesque’ is a better concept through which to understand alcohol’s place in British society today. The concept of the carnivalesque conveys an earthy yet extraordinary culture of drinking, as well as ritual elements with a lack of comfort and security that characterise the night-time economy for many people. This night-time carnival, as well as being something experienced by participants, is also a spectacle, with gendered and classed dynamics. It is suggested that this concept is helpful in making sense of common understandings of alcohol that run through the spheres not only of alcohol consumption but also production and regulation

Understanding English alcohol policy as a neoliberal condemnation of the carnivalesque

Much academic work has argued that alcohol policy in England over the past 25 years can be characterised as neoliberal, particularly in regard to the night-time economy and attempts to address “binge” drinking. Understanding neoliberalism as a particular “mentality of government” that circumscribes the range of policy options considered appropriate and practical for a government to take, this article notes how the particular application of policy can vary by local context. This article argues that the approach of successive governments in relation to alcohol should be seen as based on a fear and condemnation of the carnivalesque, understood as a time when everyday norms and conventions are set aside, and the world is – for a limited period only – turned inside out. This analysis is contrasted with previous interpretations that have characterised government as condemning intoxication and particular forms of pleasure taken in drinking. Although these concepts are useful in such analysis, this article suggests that government concerns are broader and relate to wider cultures surrounding drunkenness. Moreover, there is an ambivalence to policy in relation to alcohol that is better conveyed by the concept of the carnivalesque than imagining simply a condemnation of pleasure or intoxication