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Search Results: 1 - 10 of 10017 matches for " Sydney;Andrade "
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Building Trust: Children Experiences with Food Allergies at Summer Camp  [PDF]
Sydney Leibel, Nancy Fenton
Health (Health) , 2016, DOI: 10.4236/health.2016.814143
Abstract: Introduction: The objective of this study was to explore the experiences and perceptions of children with food allergies at summer camp. Methods: Qualitative draw-and-tell interviews were conducted with 14 food allergic individuals aged 5 - 12 years to capture their lived experience with food allergies at summer camp. Results: Four key interdependent themes: trust, accommodation, proactive parents and coping strategies were identified in how children perceive their food allergies in unregulated summer camp environments.
Electrochemical degradation of reactive dyes at different DSA? compositions
Silva, Rodrigo G. da;Aquino Neto, Sydney;Andrade, Adalgisa R. de;
Journal of the Brazilian Chemical Society , 2011, DOI: 10.1590/S0103-50532011000100017
Abstract: this paper investigates the electrochemical oxidation of the reactive dyes reactive blue 4 (rb-4) and reactive orange 16 (ro-16) on ruo2 dimensionally stable anode (dsa?) electrodes. electrolysis was achieved under galvanostatic control as a function of supporting electrolyte and electrode composition. the electrolyses, performed in either the presence or absence of nacl, were able to promote efficient color removal; moreover, at low chloride concentration (0.01 mol l-1), total color removal was obtained after just 10 min of electrolysis, and a significant increase in total dye combustion was achieved for all the studied anodes in chloride medium (reaching ca. 80% - chemical oxygen demand - cod removal). no significant enhancement in dye color removal or mineralization was observed upon increasing chloride concentration. the influence of oxide composition on dye elimination seems to be significant in both media (with or without chloride), being ti/ru0.30ti0.70o2, the most active material for organic compound oxidation. the oxygen evolution reaction (oer) was shown to be a limiting reaction in both supporting electrolytes; i.e., nacl and na2so4, and its competition with organic compound oxidation remained an obstacle. the adsorbable organo halogens (aox) formation study revealed that there is slight consumption of the undesirable species formed within the first minutes of the electrolysis, being ti/(ruo2)0.70(ta2o5) 0.30 the most environmentally friendly composition. both anode composition and chloride concentration affect the formation of these undesirable compounds.
Analysis of the flow profile of six endodontic cements
Gilson Blitzkow Sydney,M?nica Ferreira,Marili Doro Andrade Deonizio,Denise Piotto Leonardi
RGO : Revista Gaúcha de Odontologia , 2009,
Abstract: Objective: To assess the flow characteristic of six endodontic filling cements by means of the vertical flow test: N-Rickert (Fórmula e A o, S o Paulo, Brazil), Endofill (Dentsply, Petrópolis, Brazil), Zinc Oxide and Eugenol (SS White, Rio de Janeiro, Brazil), AH-Plus (Dentsply, Petrópolis, Brazil), EndoRez (Ultradent, South Jordan, UT, USA) and Intra-Fill (SS White, Rio de Janeiro, Brazil).Methods: Flow test was performed by placing the 0.1 ml samples of cements between two plates of polished glass measuring 30 x 26 cm. Thesamples were deposited on the top part with aid of a insulin syringe. The plates were taken to an oven at 37o and relative humidity of 100%.Flow was measured by means of a sheet of millimetric paper placed between the glass plates, at time intervals of 10 minutes, 20 minutes, 30 minutes, one hour, two hours, three hours, four hours, five hours, six hours, 12 hours, 24 hours and 48 hours.Results: Endofill (Dentsply, Petrópolis, Brazil) showed flow of 69.3mm, followed by N-Rickert (Fórmula e A o, S o Paulo, Brazil) (43.0mm) and AH-Plus (Dentsply, Petrópolis, Brazil) (29.3mm). The cements Intrafill (SS White, Rio de Janeiro, Brazil), Zinc Oxide and Eugenol (SS White, Rio de Janeiro, Brazil) and EndoRez (Ultradent, South Jordan, UT, USA) presented no flow. N-Rickert (Fórmula e A o, S o Paulo, Brazil) and Endofill (Dentsply, Petrópolis, Brazil) behaved similarly, and needed no initial force to become displaced. The cement N-Rickert (Fórmula e A o, S o Paulo, Brazil) flowed for up to thirty minutes and Endofill (Dentsply, Petrópolis, Brazil) up to the second hour of observation. Initial flow of AH-Plus (Dentsply, Petrópolis, Brazil) was 0.8mm up to three hours, remaining stable after the fifth hour. Conclusion: The cements Zinc Oxide and Eugenol (SS White, Rio de Janeiro, Brazil), Intrafill (SS White, Rio de Janeiro, Brazil) and EndoRez (Ultradent, South Jordan, UT, USA) did not present any flow during the experiment. The greatest flow was for Endofill (Dentsply, Petrópolis, Brazil) followed by N-Rickert (Fórmula e A o, S o Paulo, Brazil) and AH-Plus (Dentsply, Petrópolis, Brazil) with a significant statistical difference(p<0.01).
Bound States in Delta Function Potentials
Sydney Geltman
Journal of Atomic, Molecular, and Optical Physics , 2011, DOI: 10.1155/2011/573179
Abstract: We present a systematic treatment of the bound state structure of a short-range attractive interatomic potential in one, two, and three dimensions as its range approaches zero. This allows the evaluation of the utility of delta function potentials in the modeling of few-body systems such as nuclei, atoms, and clusters. The relation to scattering by delta function potentials is also discussed.
Life sentences: Detective Rummage investigates
Sydney Brenner
Genome Biology , 2002, DOI: 10.1186/gb-2002-3-9-comment1013
Abstract: It is very ego-warming to be recognized by quotation. Ever since this first happened to me, I always consult books of quotations to see if I appear there and, of course, I am always looking for opportunities to create epigrams that might appear in future collections. Sometimes, however, it is difficult to trace their source. I recently received an enquiry from an editor who wanted to use a quotation attributed to me in a publication and asked if I knew where it had first appeared. I thought I recalled being the author of the quotation - "Progress in science depends on new techniques, new discoveries and new ideas, probably in that order" - but could not recollect where or when I had said it. However, I believed I knew how to track it down because I remembered it was quoted in Alan Mackay's collection A Dictionary of Scientific Quotations. This referred to Nature, 5 May 1980. But on checking, I found there is no Nature of that date and I did not relish examining variations of the date and possibly even the name of the journal.There the matter rested, unresolved, until a few weeks ago when I was rummaging through the piles of papers that I have accumulated. There I came across some hand-written notes of a talk I had given at a symposium organised by the Friedrich Miescher Institute in Basel, Switzerland, on 20 March 1980. The symposium celebrated the 10th birthday of the institute and looked forward to the next decade with the title 'Biology in the 1980s'. My role, however, was to look back on the previous decade. In doing so, according to my notes, I told my audience: " I will ask you to mark again that rather typical feature of the development of our subject; how so much progress depends on the interplay of techniques, discoveries and new ideas, probably in that order of decreasing importance."So there it was - or something like it. All I had to do was to look up Nature for a report of the meeting. I found it in the issue of 5 June 1980. It was called "Biology in th
After the (draft) sequence
Sydney Brenner
Genome Biology , 2001, DOI: 10.1186/gb-2001-2-5-comment1006
Abstract: I will begin by saying something about the two approaches used. GC based their approach on sequencing ordered, large-insert bacterial artificial chromosome (BAC) libraries which had previously been shown to produce data with 99.99% accuracy and no gaps. It makes sense to talk about such levels of accuracy when dealing with single cloned stretches of DNA. A collection of such BACs would not provide a total human genome sequence with that accuracy, however, but instead a singular mosaic, not representing any existing human genome. With a level of polymorphism of 0.1%, it is clearly not possible to talk about this level of accuracy for the genome sequence. The insistence on high accuracy may have carried with it certain costs, and it is clear that the switch to a draft sequence because of CG's entry into the field speeded up the work considerably. In retrospect it might have been more reasonable to have aimed at that from the start. There were some heretics who thought that this would be an important first step rather than wasting resources on the precise sequencing of all those Alu repeats. By October 2000, when the GC data were assembled, 900 megabases had been sequenced with 20-25 X coverage (each base sequenced an average of 20-25 times) and were considered finished, 3000 megabases were in draft form (12 X coverage) and a minority, 270 megabases, were in pre-draft form (6 X coverage). All of these data were available to CG.CG's assembly was based on a 'mate-pair' strategy. This is not completely random, as many believe, but provides results in which one half of the data is spatially correlated with the other half, since two sequences are collected from the two ends of clones with inserts of several sizes (2,10 and 50 kilobases). CG used two approaches in their assembly. In the first, the publicly available sequence from more than 30,000 BACs was shredded, pooled with CG's own data and assembled. In the second, the known BAC clustering was preserved and these cluste
Life sentences: Elementary Zenetics - do or dai
Sydney Brenner
Genome Biology , 2002, DOI: 10.1186/gb-2002-3-5-comment1008
Abstract: It was after hearing Ohno talk at a meeting in Japan that I discovered that there may be a whole new way of looking at genes, and at the end of the meeting I was able to announce the birth of the new subject of Zenetics. This came from a comparison of the development of our subject with that of the Zen stone garden, the epitome of Zen art. As is well known, Japanese art does not attempt to transform Nature but merely rearranges it. Except for the odd Buddha, there are no works of monumental sculpture in which stone is carved into representations of the world; instead there are gardens where the arrangement of water, trees and rocks is a representation of a famous view. One then finds gardens in which the vegetation has been removed to leave a more austere and abstract representation of a generalized landscape. Finally, there is a further stage where a few stones are placed on sand in carefully chosen arrangements and one comes to realize, in the true Zen fashion, that here the stones mean only themselves. If this is applied to genes and sequences, as in the new field of Zenetics, we can see the deep truth of the human genome - that most of the sequence means only itself. This is very different from saying that the sequences have no meaning at all. This difference can only be appreciated by the oriented mind, which is close to, but not quite the same as, the Oriental mind.A few months ago I found a little book on Zen and realized that I had only scratched the surface of what could be an enormous collection of new knowledge. Zen Buddhism is very special, in that it has discovered a new approach to gaining understanding: you can forget about microarrays, cluster analysis and the rest of it because all you need is the process of enlightenment. It is hard to say what this is exactly, but when it happens you will know it and that's that. Saying that sequences mean only themselves is such a moment of enlightenment and the fact that it may be illogical only proves that it i
Life sentences: Hunters and gatherers
Sydney Brenner
Genome Biology , 2002, DOI: 10.1186/gb-2002-3-2-comment1003
Abstract: So I resorted to word origins to help me with a title, and discovered that 'reading' was not about books but originally meant to discern or to advise; when used as in 'reading a riddle' or 'reading the future' it meant to explain and to discover deeper meanings. On the other hand, 'writing' was about scratching the surface, clearly a much more superficial activity than reading, and the word book came from the birch tree, on the bark of which old Nordic languages were written. I thought of Broken Reads, Writes of Passage, Forward Bookings and, more tenuously, Slight Reservations, but all were rejected. Finally, as 2001 was drawing to close, I successfully suggested Life Sentences, which my editor liked probably because of its tenure implications.The reader, or should I say the scanner of this text message, will notice from the specific title of this column that I have become interested in the anthropology of everyday life. I have discovered that this is an important area for social research and that there are now learned treatises on such subjects as shopping, complete with graphs and, as you will soon discover, I have my own theories about the subject. Actually what has driven me into this area of human science is the long delayed start I have made on tidying up my papers, which has led me to some important considerations about collectors and collecting.It is clear that a collection represents a balance between input and output, that is, between acquiring and disposing, and its size will depend on the relative rates of these two activities. Immediately one sees that there are basically two kinds of collectors: acquirers and retainers. Acquirers are well understood; they have a clear idea about what they want to collect - mediaeval weapons, shrunken heads, old gramophone records - and they pursue their collecting by a directed process of acquisition. They like to have unique objects that no other collector has or, if that can't be arranged, then a unique ensemble of
Life sentences: Ontology recapitulates philology
Sydney Brenner
Genome Biology , 2002, DOI: 10.1186/gb-2002-3-4-comment1006
Abstract: This way of introducing oneself is typically American. In England, I always said "My name is Sydney Brenner" and in old Mittel Europe I would probably have clicked my heels, bowed and merely said "Brenner". But, then, what's in a name? I have always thought that there is a difference between who you are and what you are called, and that objects are not the same as their names.I was reminded of this a few months ago, when I met somebody who told me that the coming thing in the post-genomic era is the new science of Ontology. When I asked him what he meant by this, he said it had to do with how we name things in biology and directed me to a paper "Creating the Genome Ontology Resource: Design and Implementation" written by a number of websites and printed in Genome Research11: 1425, 2001. I urge everybody who has a lot of time to waste to go and read it.I discovered that an ontology is a structured vocabulary in the form of a directed acyclic graph such that each term is descended from its parent by some defined relationship such as "part of". It is a network where the children can have many parents and, in turn, be parents themselves. The objectives of the Gene Ontology Consortium are to define these structured hierarchical vocabularies, to describe biological objects using these terms, and to provide computing tools to manipulate these ontologies and connect them to databases.These aims are laudable. Everybody should know what they are talking about and should use the same language, and computers and databases need to be taught to say the same thing. I doubt the paper's claims that this will solve the problems generated by the endless growth of biological data and I suspect that the best that gene ontology will do is give us a common language in which to express our confusion. My aim is to get out of the Tower of Babel and go somewhere else, rather than try to find a common language to govern it. The connection between Babel and babble is more than a coincidence.Goi
THE MORPHOLOGY OF GEOMAGNETIC STORMS: AN EXTENSION OF THE ANALYSIS OF Ds, THE DISTURBANCE LOCAL-TIME INEQUALITY
SYDNEY CHAPMAN
Annals of Geophysics , 1952, DOI: 10.4401/ag-5858
Abstract: .
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