203 research outputs found
Cis-bis(isothiocyanato)-bis(2,2 '-bipyridyl-4,4 ' dicarboxylato)-Ru(II) (N719) dark-reactivity when bound to fluorine-doped tin oxide (FTO) or titanium dioxide (TiO2) surfaces
No full textThe solar cell sensitizer cis-bis(isothiocyanato)-bis(2,2′-bipyridyl-4,4′dicarboxylato)-ruthenium(II) (N719) is adsorbed and investigated at two electrode surfaces: (i) at a bare fluorine-doped tin oxide (FTO) and (ii) at a nano-particulate anatase (TiO2) film in contact with FTO. N719 is adsorbed from acetonitrile onto FTO surfaces giving poor quality partial or multi-layer coverage commencing at 10-7 M concentration. In contrast, from 50% acetonitrile 50% tBuOH solution of N719 Langmuirian adsorption occurs with well-defined mono-layer coverage and a binding constant ca. 2 × 105 mol-1 dm3. The adsorbed N719 exhibits voltammetric oxidation/back-reduction responses with Emid ≈ 0.56 (weaker) and 0.68 (dominant) V vs. Ag/AgCl (3 M KCl) and with chemically reversible characteristics at sufficiently high scan rates (ca. 16 V s-1). A chemical reaction step involving oxidised N719 at the electrode surface leads to the loss of electrochemical activity at slower scan rates with a first order chemical rate constant of ca. 2.4 s-1. The electro-catalytic oxidation of iodide is demonstrated for both the intact metal complex N719 and the reaction product formed after oxidation. When adsorbed onto TiO2 (porous films made from approximately 9 nm diameter TiO2 particles, Langmuirian binding constant ca. 105 mol-1 dm3), immersed in acetonitrile (0.1 M NBu4PF6), and at sufficiently fast scan rates (ca. 16 V s-1), the N719 metal complex exhibits reversible voltammetric responses (with Emid ≈ 0.68 V vs. Ag/AgCl (3 M KCl)). At slower scan rates, the voltammetric response again appears irreversible, however, this time without significant degradation of the N719 metal complex at the TiO2 surface. It is shown that the conduction mechanism via electron hopping becomes ineffective due to degradation of FTO-adsorbed N719. In the presence of iodide, the electro-catalytic iodide oxidation process (dark electro-catalysis) is shown to occur predominantly at the N719-modified FTO electrode surface. Implications of this dark-reactivity for the solar cell performance are discussed. © 2010 Elsevier B.V. All rights reserved
Lake sturgeon behavioural responses to <i>p</i>CO<sub>2</sub> and temperature
No full textBehavioural data for lake sturgeon reared in elevated pCO2, temperature, both, or neither and exposed to different cues. The file "Individual Mastersheet Feb 10 2020_MTadditions.xlsx" has data on time near a novel object, time in thigmotaxis zone, total activity, activity near a novel object, and activity in the thigmotaxis zone. The phrase MTadditions is from co-first author Matt Thorstensen filling in raw data from one treatment group from anonymized spreadsheets used by Luke Belding during scoring, which L. Belding was not able to do. The file "BoldnessTrial_1.MPG" has a representative video file of lake sturgeon behaviour in this experiment.The "Overwinter Data 2018 Master Sheet.xlsx" file has cue side and proportions of time in cue or facing cue following a 10,000 uatm pCO2 exposure. </p
Introduzione all'analisi del testo (narrativo) latino
No full textThe research is aimed to elaborate a method of critical reading of latin texts of different genres (epics, tragedy, comedy, history, novel) resulting from the belding of philology and narratology (expecially according to the teaching of R. Barthes, G. Genette and their school)
History of Dialysis in the UK: c. 1950–1980
No full textDialysis, the first technological substitution for organ function, is significant not only for the numbers of patients who have benefited. It contributed to the emergence of the field of medical ethics and the development of the nurse specialist, and transformed the relationship between physicians and patients by allowing patients to control their treatment.
This seminar drew on participants’ recollections of dialysis from the early, practically experimental days after the Second World War, when resources for research were scant, until the 1980s when it had become an established treatment. Pioneers from the first UK dialysis units recalled the creation of the specialty of nephrology amid discouragement from renal physicians and the MRC, which felt that the artificial kidney was a gadget that would not last.
International and interdisciplinary collaborations, and interactions between with industry and clinics in developing and utilising the specialist technology were emphasized. Patients, carers, nurses, technicians and doctors reminisced about their experiences of home dialysis, its complications and impact on family life, as well as the physical effects of surviving on long-term dialysis before transplantation became routine.
The meeting was suggested and chaired by Dr John Turney and witnesses include Dr Rosemarie Baillod, Professor Christopher Blagg, Professor Stewart Cameron, Mr Eric Collins, Professor Robin Eady, Mrs Diana Garratt, Professor David Kerr, Professor Sir Netar Mallick, Dr Frank Marsh, Dr Jean Northover, Dr Chisholm Ogg, Dr Margaret Platts, Dr Stanley Rosen and Professor Stanley Shaldon. Two appendices contain reminiscences from Professor Kenneth Lowe and Sir Graham Bull
Injurious Effects from Contacts with Millipedes
No full textMillipedes are probably among the least mentioned of the so-called medically important arthropods. Perusal of a number of the more common texts dealing with the entomological aspects of medicine (Belding, 1942: 600, Craig and Faust, 1940:511, Herms, 1946: 539, Mackie, Hunter, and Worth, 1945:515) revealed the concept, which is commonly believed, that millipedes are not capable of producing injurious effects. A recent experience of the senior author and additional investigation by both writers have prompted the writing of this paper in an effort to broaden scientific thinking regarding the medical significance of this animal
In-network processing on low-cost IoT nodes for maritime surveillance
No full textThe effective distribution of offensive weapon capabilities to naval units at the tactical edge is a critical focus for Navy leaders. A direct byproduct of this priority is the need to employ sensor and data collection systems that can effectively guide the targeting of that offensive capability. In the recent past, wireless sensor networks have received limited use in the maritime domain due to the exploratory nature of technology, high system complexity and the high cost of system deployment. With the Internet-of-Things revolution, commercially available hardware and software components can be used to build low-cost, reliable, disposable wireless sensor networks that can leverage in-network processing schemes to greatly expand the intelligence collection footprint. In this research, a technology demonstrator composed of low-cost wireless sensor nodes leveraging in-network processing for the gathering of wireless transmitter data was investigated. The sensor nodes were created using consumer electronic components, open-source software libraries, and networking protocols used commercially to support distributed sensors organized in a network. The network demonstrates that, for a fraction of the cost associated with conventional persistent surveillance systems, a complete sensor network can be implemented at the tactical edge and provide valuable intelligence from a variety of sources.Approved for public release; distribution is unlimited.Lieutenant Commander, United States Navyhttp://archive.org/details/innetworkprocess109455303
The farmers' millennium: the ideology of agricultural improvement in Iowa, 1855 to 1865
No full textThe Morrill Act of 1862, a piece of federal legislation enacted a century and a half ago, lives on today. That law allocated thousands of acres of federal land to state governments, based on the size of their congressional delegations, so they could establish colleges of agriculture and the mechanic arts and give a college education, liberal and practical, to students who could not otherwise afford one. The Morrill Act lives on because the "land-grant colleges" it endowed with financial resources still exist today, operating on billion-dollar budgets and enrolling tens of thousands of students. Further, at least at Iowa State University, each incoming president's in-augural address has involved an explanation of the land-grant idea.
In the past three decades, that explanation has devolved from the broad view, held for a century, that land-grant colleges should prepare their students to be productive economically and politically, that they should educate them to be competent engineers and agriculturists as well as civic-minded people capable of acting not just in someone's private interest, but in their commu-nity's - their polity's - public interest. The latest presidents of Iowa State have, since the 1980s, put forward an explanation of the land-grant idea that places economic values, rather than politi-cal values, at the center of the university's existence. The work of historians of agriculture and the land-grant colleges has not been much better, the former paying little attention to the land-grant colleges and the latter more often than not failing to see the larger context in which the col-leges were created and have existed.
This thesis investigates the ideology that played a role in Iowa State University's creation in the late 1850s and early 1860s as the Iowa State Agricultural College and Model Farm. In the mid- to late 1850s, acting out of a concern for declining soil fertility (or the potential for it), the Iowa State Agricultural Society formulated an ideology of sustainable land use, scientific inves-tigation of farming techniques, and the equal dignity of labor (agricultural and mechanical work) with the more esteemed professions. The Society turned to a number of educational institutions, including annual fairs, agricultural periodicals, seed distribution programs by the federal govern-ment, township-level farmers' clubs, the state geological survey, and the state agricultural college, chartered in 1858, before the Morrill Act's passage. The author undertook this thesis because he believes that, if Iowa State's administration are going to invoke the history of the Morrill Act to rationalize their actions, they ought to know what that history is.</p
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