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Sample records for robinson acta cryst

  1. Acta Structilia

    African Journals Online (AJOL)

    Acta Structilia Journal is a South African accredited national journal for ... building economy, engineering and property or community development. ... critical analysis of pertinent risks in the Zambian construction industry · EMAIL FREE FULL TEXT ... Stakeholders' perception of critical success factors for sustainable facilities ...

  2. Acta Theologica: Submissions

    African Journals Online (AJOL)

    Acta Theologica. ... Manuscripts should be between 4000 and 7000 words. ... Three to four key words in both English and Afrikaans should be provided at the end of the article. ... Use capital letters in the title only where absolutely necessary.

  3. ACTA - Pro et contra

    OpenAIRE

    Ellebæk, Kristoffer; Stilling, Christian; Durst-Andersen, Sara S.; Vilsbøll, Signe Mai K.

    2012-01-01

    Resumé Projektrapporten har til formål at undersøge etiske problemstillinger, der opstår ved indgåelse ved en eventuel handelsaftale som ACTA (Anti-Counterfeiting Trade Agreement). Handelsaftalen er et forsøg på at sikre øgede muligheder for håndhævelse af den intellektuelle ejendomsret på tværs af landegrænser. En del af ACTA aftalen er møntet på begrænsning af piratkopiering over internettet. Ved at redegøre for den meget udbredte peer-to-peer-fildelingsteknologi (p2p) og dennes egenskaber,...

  4. Robinson, Prof. Robort

    Indian Academy of Sciences (India)

    Home; Fellowship. Fellow Profile. Elected: 1935 Honorary. Robinson, Prof. Robort Nobel Laureate (Chemistry) - 1947. Date of birth: 13 September 1886. Date of death: 8 February 1975. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year ...

  5. INTRODUCTION TO ACTA OPTICA SINICA

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    Acta Optica Sinica is a scientific periodical on optics,sponsored by Chinese Optical Society, jointly undertaken by Shanghai Institute of Optics and Fine Mechanics,Changchun Institute of Optics, Fine Mechanics and Physics,the Chinese Academy of Sciences, monthly,first published in 1981. The chief editor is Professor Xu Zhizhan, Academician of the Chinese Academy of Sciences. Now Acta Optica Sinica is a source periodical of the following international index periodicals: SA,CA,EI and PЖ.

  6. The Jackie Robinson I Remember.

    Science.gov (United States)

    Kahn, Roger

    1997-01-01

    This memoir describes Jackie Robinson's historic career as the first black player in major league baseball, emphasizing his courage and determination in the face of racism, and recounting the background to his entry into baseball. (SLD)

  7. Robinson-Foulds Supertrees

    Directory of Open Access Journals (Sweden)

    Eulenstein Oliver

    2010-02-01

    Full Text Available Abstract Background Supertree methods synthesize collections of small phylogenetic trees with incomplete taxon overlap into comprehensive trees, or supertrees, that include all taxa found in the input trees. Supertree methods based on the well established Robinson-Foulds (RF distance have the potential to build supertrees that retain much information from the input trees. Specifically, the RF supertree problem seeks a binary supertree that minimizes the sum of the RF distances from the supertree to the input trees. Thus, an RF supertree is a supertree that is consistent with the largest number of clusters (or clades from the input trees. Results We introduce efficient, local search based, hill-climbing heuristics for the intrinsically hard RF supertree problem on rooted trees. These heuristics use novel non-trivial algorithms for the SPR and TBR local search problems which improve on the time complexity of the best known (naïve solutions by a factor of Θ(n and Θ(n2 respectively (where n is the number of taxa, or leaves, in the supertree. We use an implementation of our new algorithms to examine the performance of the RF supertree method and compare it to matrix representation with parsimony (MRP and the triplet supertree method using four supertree data sets. Not only did our RF heuristic provide fast estimates of RF supertrees in all data sets, but the RF supertrees also retained more of the information from the input trees (based on the RF distance than the other supertree methods. Conclusions Our heuristics for the RF supertree problem, based on our new local search algorithms, make it possible for the first time to estimate large supertrees by directly optimizing the RF distance from rooted input trees to the supertrees. This provides a new and fast method to build accurate supertrees. RF supertrees may also be useful for estimating majority-rule(- supertrees, which are a generalization of majority-rule consensus trees.

  8. Roger Robinson, The Butterfly Hotel

    OpenAIRE

    Doumerc, Eric

    2015-01-01

    Roger Robinson is a Trinidadian poet and performer who has been based in London for a number of years now. He has had poems published in important anthologies like The Fire People (Edinburgh: Payback Press, 1998), edited by Lemm Sissay, IC3: The Penguin Book of New Black Writing in Britain, edited by Courttia Newland and Kadija Sesay (London: Penguin, 2000), and more recently Out of Bounds – British Black and Asian Poets, edited by Jackie Kay, James Procter and Gemma Robinson (Newcastle upon ...

  9. Autenticitetsstrategier i Robinson Ekspeditionen 2000

    Directory of Open Access Journals (Sweden)

    Anne Jerslev

    2002-09-01

    Full Text Available Iscenesættelse af autenticitet i realityserien Robinson Ekspeditionen er en overordnet tekstuel strategi, som bibringer en fornemmelse af ægt- hed og spontanitet. Artiklen giver eksempler på, hvorledes debattørerne på Robinson Ekspeditionens hjemmeside behandler programmets del- tagere, som om de er «sig selv«, samtidig med at de vurderes på en pa- rameter, der handler om ægthed og falskhed. Debatten på hjemmesiden handler bl.a. om «autenticitetshunger«, og artiklen diskuterer, hvorledes det lykkes for programmet at formidle en iscenesat, men samtidig uin- strueret form for dokumentarisme, samtidig med at deltagerne fungerer som spilfigurer i en stramt redigeret fortælling, der baserer sig på fikti- onens koder.

  10. Robinson's radiation damping sum rule: Reaffirmation and extension

    International Nuclear Information System (INIS)

    Mane, S.R.

    2011-01-01

    Robinson's radiation damping sum rule is one of the classic theorems of accelerator physics. Recently Orlov has claimed to find serious flaws in Robinson's proof of his sum rule. In view of the importance of the subject, I have independently examined the derivation of the Robinson radiation damping sum rule. Orlov's criticisms are without merit: I work through Robinson's derivation and demonstrate that Orlov's criticisms violate well-established mathematical theorems and are hence not valid. I also show that Robinson's derivation, and his damping sum rule, is valid in a larger domain than that treated by Robinson himself: Robinson derived his sum rule under the approximation of a small damping rate, but I show that Robinson's sum rule applies to arbitrary damping rates. I also display more concise derivations of the sum rule using matrix differential equations. I also show that Robinson's sum rule is valid in the vicinity of a parametric resonance.

  11. Eunuchs in the Bible | Retief | Acta Theologica

    African Journals Online (AJOL)

    Acta Theologica. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 26, No 2 (2006) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF file you selected should load here if ...

  12. Hippocrates: facts and fiction | Retief | Acta Theologica

    African Journals Online (AJOL)

    Acta Theologica. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 26, No 2 (2006) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF file you selected should load here if ...

  13. Robinson's Computerized Strabismus Model Comes of Age

    NARCIS (Netherlands)

    H.J. Simonsz (Huib); H. Spekreijse (Henk)

    1996-01-01

    textabstractIn this article we review our further development of D.A. Robinson's computerized strabismus model. First, an extensive literature study has been carried out to get more accurate data on the anatomy of the average eye and the eye muscles, and about how these vary with age and with

  14. 78 FR 18224 - Airworthiness Directives; Robinson Helicopter Company Helicopters

    Science.gov (United States)

    2013-03-26

    ... Airworthiness Directives; Robinson Helicopter Company Helicopters AGENCY: Federal Aviation Administration (FAA... Helicopter Company (Robinson) Model R44 and R44 II helicopters equipped with emergency floats. This AD..., contact Robinson Helicopter Company, 2901 Airport Drive, Torrance, CA 90505; telephone (310) 539-0508; fax...

  15. 77 FR 12991 - Airworthiness Directives; Robinson Helicopter Company Helicopters

    Science.gov (United States)

    2012-03-05

    ... Airworthiness Directives; Robinson Helicopter Company Helicopters AGENCY: Federal Aviation Administration (FAA...) that was published in the Federal Register. That AD applies to Robinson Helicopter Company (Robinson) Model R22, R22 Alpha, R22 Beta, R22 Mariner, R44, and R44 II helicopters. The paragraph reference in...

  16. Cumulative indices for Spectrochima Acta, Part A and Spectrochimica Acta, Part B

    International Nuclear Information System (INIS)

    Scheeline, A.; Williams, B.; Williksen, E.; Jeffrey Steinfeld,; McEnroe, B.

    1998-01-01

    This article is an electronic publication in Spectrochimica Acta Electronica (SAE), a section of Spectrochimica Acta, Part B (SAB). The hardcopy text is accompanied by an electronic archive, stored on the SAE homepage at http://www.elsevier.nl/locate/sabe. The archive contains data, index and program files. The main article discusses the bibliographical purpose of the program and data files. A collective index for Spectrochimica Acta for volumes since it was split into Parts A and B, and continuing through 1991 for SAA and 1997 for SAB, is presented in DBF format, along with rudimentary data entry and access software. (Copyright (c) 1998 Elsevier Science B.V., Amsterdam. All rights reserved.)

  17. [The thirty years of Acta Genetica Sinica].

    Science.gov (United States)

    Li, Shao-Wu; Zhou, Su; Xue, Yong-Biao; Zhu, Li-Huang

    2003-04-01

    Acta Genetica Sinica (AGS) is sponsored by the Genetics Society of China and the Institute of Genetics and Developmental Biology of Chinese Academy of Sciences, and is published by Science Press. The journal is a leading national academic periodical and one of the Chinese key periodicals of natural sciences. Currently, AGS is being indexed by several well-known domestic and international indexing systems, such as the American Chemical Digest (CA), BIOSIS database, Biological Digest (BA), Medical Index and Russian Digest (P [symbol: see text]). Papers in the areas of genetics, developmental biology, cell molecular biology and evolution are regularly published by AGS.

  18. STS-114 Crew Interview: Stephen Robinson

    Science.gov (United States)

    2003-01-01

    Stephen Robinson, Mission Specialist 2 (MS2), of the STS-114 space mission is seen during a prelaunch interview. He discusses his duties as flight engineer, Extravehicular Activity 2 (EVA 2) spacewalker, and medical officer. Robinson answers questions about his interests in spaceflight and the specific goals of the mission. He identifies this mission as the International Space Station Resupply Mission because supplies and experiments are brought to the International Space Station and Expedition 6 crew of Commander Kenneth Bowersox, and Flight Engineers Donald Pettit and Nikolai Budarin are returning to Earth. Lastly, he talks about the docking of the Space Shuttle Atlantis with the International Space Station. He looks forward to this experience in space.

  19. Comment on "Experimental study of the orientation dependence of indium incorporation in GaInN" [J. Cryst. Growth 433 (2016) 7-12

    Science.gov (United States)

    Monavarian, Morteza

    2016-07-01

    The authors of the title paper (J. Cryst. Growth 433 (2016) 7-12) reported on experimental comparison of indium incorporation efficiency in wide variety of orientations tilted from the basal plane toward a-plane (a-family planes) or m-plane (m-family planes) and some mixed planes. Despite a good investigation and useful information reported in this manuscript, some points of criticism, concerning the inclination angle calculations, optical characterizations of the layers, and the final conclusions are highlighted in this comment to consider.

  20. Robinson manifolds and Cauchy-Riemann spaces

    CERN Document Server

    Trautman, A

    2002-01-01

    A Robinson manifold is defined as a Lorentz manifold (M, g) of dimension 2n >= 4 with a bundle N subset of C centre dot TM such that the fibres of N are maximal totally null and there holds the integrability condition [Sec N, Sec N] subset of Sec N. The real part of N intersection N-bar is a bundle of null directions tangent to a congruence of null geodesics. This generalizes the notion of a shear-free congruence of null geodesics (SNG) in dimension 4. Under a natural regularity assumption, the set M of all these geodesics has the structure of a Cauchy-Riemann manifold of dimension 2n - 1. Conversely, every such CR manifold lifts to many Robinson manifolds. Three definitions of a CR manifold are described here in considerable detail; they are equivalent under the assumption of real analyticity, but not in the smooth category. The distinctions between these definitions have a bearing on the validity of the Robinson theorem on the existence of null Maxwell fields associated with SNGs. This paper is largely a re...

  1. Repurposing the Caltech Robinson Hall Coelostat

    Science.gov (United States)

    Treffers, Richard R.; Loisos, G.; Ubbelohde, M.; Douglas, S.; Martinez, M.

    2013-01-01

    We describe the repurposing of the historic coelostat atop Caltech’s Robinson Hall for building lighting, public education and scientific research. The coelostat was originally part of George Ellery Hale’s vision of the Astrophysical Laboratory on the Caltech campus in 1932. The coelostat, designed by Russell Porter, has a 36 inch diameter primary mirror a 30 inch diameter secondary mirror and provides a 24 inch un-vignetted beam of sunlight into the building. Although constructed in the 1930s, due to wartime pressures and other projects, it was used only briefly in the 1970s and never fully realized. Recently Robinson Hall has been fully renovated to house the Ronald and Maxine Linde Center for Global Environmental Science. The coelostat operation was modernized replacing the old motors and automating all the motions. Each morning, if the weather cooperates, the dome slit opens, the mirrors configured and sunlight pours into the building. The beam of sunlight is divided into three parts. One part goes into a refracting telescope which projects a ten inch diameter of the sun onto a ground glass screen visible to the public. A second fraction is distributed to fiber optic fixtures that illuminate some of the basement rooms. The final fraction goes into two laboratories where it is used in experiments monitoring trace constituents of our atmosphere and for solar catalysis experiments. The instrument as originally conceived required at least two human operators. Now it is fully automatic and doing real science

  2. 77 FR 63260 - Airworthiness Directives; Robinson Helicopter Company Helicopters

    Science.gov (United States)

    2012-10-16

    ... Helicopter Company Helicopters AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). SUMMARY: We propose to adopt a new airworthiness directive (AD) for Robinson Helicopter Company (Robinson) Model R44 and R44 II helicopters equipped with emergency floats, which would require...

  3. Jackie Robinson, President Eisenhower, and the Little Rock Crisis.

    Science.gov (United States)

    Vernon, John; And Others

    1997-01-01

    Presents background information and instructional materials for a lesson plan concerning the interaction between Jackie Robinson and President Eisenhower regarding the integration of public schools in Little Rock, Arkansas. Robinson chided the President for his cautious response to violent opposition to integration. Includes a copy of the…

  4. Asymptotic behaviour of Robinson-Trautman pure radiation solutions

    International Nuclear Information System (INIS)

    Bicak, J.; Perjes, Z.

    1986-08-01

    It is shown that spherical Robinson-Trautman space-times filled with a homogeneous time-varying radiation field approach the Vaidya metric as the retarded time goes to infinity. This is a generalization of an earlier result on the vacuum Robinson-Trautman space-times. (author)

  5. Acta Unitatis Fratrum. Ediční projekt

    Czech Academy of Sciences Publication Activity Database

    Just, Jiří

    2014-01-01

    Roč. 29, č. 2 (2014), s. 451-462 ISSN 0231-7494 Institutional support: RVO:67985963 Keywords : The Bohemian Brethren * protestant historiography * manuscript sources * regesta edition * Acta Unitatis Fratrum Subject RIV: AB - History

  6. Rethinking Volks V Robinson: The Implications of Applying a ...

    African Journals Online (AJOL)

    Rethinking Volks V Robinson: The Implications of Applying a "Contextaulised Choice Model" to Prospective South African Domestic Partnerships Legislation. ... is enacted. Keywords: Life partnership; domestic partnership; Domestic Partnerships Bill; choice argument; contextualised choice model; reciprocal duty of support.

  7. Elsevier/Spectrochimica Acta atomic spectroscopy award 2015

    Science.gov (United States)

    Omenetto, Nicolo; de Loos-Vollebregt, Margaretha

    2016-12-01

    This is to announce the 2015 Elsevier/Spectrochimica Acta award, the annual award honoring the most significant article(s) published in a volume. Elsevier makes this award on behalf of Spectrochimica Acta, Part B, to encourage the publication of top articles in this journal. All papers published during one year are considered for this award and the Editorial Advisory Board and the Guest Editor(s) of the special issue(s) are responsible for the selection. The award consists of a monetary prize of 1000 together with a presentation certificate.

  8. Elsevier/Spectrochimica Acta Atomic Spectroscopy Award 2014

    Science.gov (United States)

    Omenetto, Nicolo'; de Loos, Greet

    2016-03-01

    This is to announce the 2014 Elsevier/Spectrochimica Acta Award, the annual award honoring the most significant article(s) published in a volume. Elsevier makes this award on behalf of Spectrochimica Acta, Part B, to encourage the publication of top articles in this journal. All papers published during one year are considered for this award and the Editorial Advisory Board and the Guest Editor(s) of the special issue(s) are responsible for the selection. The award consists of a monetary prize of 1000 together with a presentation certificate.

  9. Joan Robinson e la teoria economica. (Joan Robinson and economic theory

    Directory of Open Access Journals (Sweden)

    A. ASIMAKOPULOS

    2013-12-01

    Full Text Available L'interesse di Joan Robinson nel problema della distribuzione del reddito e il suo disprezzo per quello che considera le teorie che hanno cercato di giustificare le distribuzioni esistenti di reddito mai segnalati . Il suo lavoro è caratterizzato da una forte inclinazione per chiari  argomenti ben ragionati che non lasciavano spazio per  sciatte abitudini  di pensiero . La portata ampia e la quantità di scritti di Robinson rendono difficile presentare una valutazione critica dei suoi contributi nel contesto anche di un documento lungo . Quella attuale si concentra sui suoi scritti in cinque aree principali : (i l'economia della concorrenza imperfetta ; ( ii la teoria del rapporto di lavoro ; ( iii la teoria di accumulazione nel lungo periodo ; ( iv il concetto di capitale e la funzione di produzione ; e ( v il problema del tempo in economia che si riflette nei suoi scritti sulla storia tema contro equilibrio .Joan Robinson’s interest in the question of the distribution of income and her disdain for what she considered to be theories that tried to justify existing distributions of income never flagged. Her work is marked by a strong inclination for clear, well reasoned arguments that left no room for sloppy habits of thought. The wide scope and quantity of Robinson’s writings make it difficult to present a critical evaluation of her contributions within the context of even a lengthy paper. The present one concentrates on her writings in five main areas: (i the economics of imperfect competition; (ii the theory of employment; (iii the theory of accumulation in the long run; (iv the concept of capital and the production function; and (v the problem of time in economics as reflected in her writings on the theme history versus equilibrium. JEL: B31, E24

  10. The language ecology of a new Afrikaans Bible | Ponelis | Acta ...

    African Journals Online (AJOL)

    Acta Theologica. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 22, No 1 (2002) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF file you selected should load here if ...

  11. A new framework for Bible translation | Wilt | Acta Theologica

    African Journals Online (AJOL)

    Acta Theologica. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 22, No 1 (2002) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF file you selected should load here if ...

  12. Advertising in Actas Dermosifiliográficas, 1909-1939.

    Science.gov (United States)

    Díaz-Díaz, R M

    2014-05-01

    We review advertisements published in the journal Actas Dermosifiliográficas between 1909 and 1939. Treatments for sexually transmitted diseases were advertised with particular frequency, and they offer a case in point that exemplifies the close relationship between the pharmaceutical industry and medical journals. Copyright © 2012 Elsevier España, S.L. and AEDV. All rights reserved.

  13. The death of Alexander the Great | Retief | Acta Theologica

    African Journals Online (AJOL)

    Acta Theologica. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 26, No 2 (2006) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF file you selected should load here if ...

  14. Snake and staff symbolism in healing | Retief | Acta Theologica

    African Journals Online (AJOL)

    Acta Theologica. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 26, No 2 (2006) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF file you selected should load here if ...

  15. Robinson's chaos in set-valued discrete systems

    International Nuclear Information System (INIS)

    Roman-Flores, Heriberto; Chalco-Cano, Y.

    2005-01-01

    Let (X,d) be a compact metric space and f:X->X a continuous function. If we consider the space (K(X),H) of all non-empty compact subsets of X endowed with the Hausdorff metric induced by d and f-bar :K(X)->K(X), f-bar (A)={f(a)/a-bar A}, then the aim of this work is to show that Robinson's chaos in f-bar implies Robinson's chaos in f. Also, we give an example showing that R-chaos in f does not implies R-chaos in f-bar

  16. Quasilocal energy and the Bel-Robinson tensor

    International Nuclear Information System (INIS)

    Krishnasamy, Ilangkovan

    1985-01-01

    The general-relativistic field equations are examined from the point of view of a local inertial observer and a quasilocal definitions of energy-momentum is thereby obtained. This definition relates to the Bel-Robinson tensor and the approach is shown to be consistent with the result obtained from the definition of energy given by Hawking. (author)

  17. Percy Julian, Robert Robinson, and the Identity of Eserethole

    Science.gov (United States)

    Ault, Addison

    2008-01-01

    The Nova production "Percy Julian--Forgotten Genius" included the very public disagreement between Percy Julian, an unknown American chemist, and Robert Robinson, possibly the best known organic chemist of the day, as to the identity of "eserethole", the key intermediate for the synthesis of the alkaloid physostigmine. The Nova production,…

  18. On the Robinson theorem and shearfree geodesic null congruences

    International Nuclear Information System (INIS)

    Tafel, J.

    1985-01-01

    Null electromagnetic fields and shearfree geodesic null congruences in curved and flat spacetimes are studied. We point out some mathematical problems connected with the validity of the Robinson theorem. The problem of finding nonanalytic twisting congruences in the Minkowski space is reduced to the construction of holomorphic functions with specific boundary conditions. (orig.)

  19. Robinson's computerized model of eye muscle mechanics revised.

    NARCIS (Netherlands)

    H.J. Simonsz (Huib)

    1994-01-01

    textabstractThe computerized model of static eye-muscle mechanics developed by Robinson was revised extensively and improved. An extensive literature study yielded additional information on the average diameter of the eye as related to age, on the average location of the insertions and origins of

  20. Beyond the Playing Field: Jackie Robinson, Civil Rights Advocate. Lesson Plan.

    Science.gov (United States)

    National Archives and Records Administration, Washington, DC.

    This packet provides primary source documents and lesson plans relating to the study of Jackie Robinson as a civil rights advocate. The legendary baseball player, Jack Roosevelt Robinson, was the first black man to "officially" play in the big leagues in the 20th century. Jackie Robinson was not only a stellar baseball player, but he…

  1. 76 FR 44317 - Gay & Robinson, Inc.; Notice of Declaration of Intention and Soliciting Comments, Protests, and...

    Science.gov (United States)

    2011-07-25

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. DI11-12-000] Gay & Robinson... Filed: July 11, 2011. d. Applicant: Gay & Robinson, Inc. e. Name of Project: Olokele River Hydroelectric... Contact: Charles Okamoto, President, Gay & Robinson, Inc., P.O. Box 156, Kaumakani, Hawaii 96747...

  2. 76 FR 51024 - Gay & Robinson, Inc.; Notice of Preliminary Permit Application Accepted for Filing and Soliciting...

    Science.gov (United States)

    2011-08-17

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [ Project No. 14219-000] Gay & Robinson... Intervene, and Competing Applications On July 1, 2011, Gay & Robinson, Inc., filed an application for a.... Applicant Contact: Mr. Charles Okamoto, President, Gay & Robinson, Inc., P.O. Box 156, Kaumakani, Hawaii...

  3. Assessment of wear facets produced by the ACTA wear machine

    DEFF Research Database (Denmark)

    Benetti, Ana R; Larsen, Liselotte; Dowling, Adam H

    2016-01-01

    . The mean wear depth was measured using the traditionally employed 2D and compared with the 3D profilometric (digital) techniques. Data were submitted to analyses of variance, Tukey's post hoc tests and Independent Samples Student's t-tests (where appropriate) at p...OBJECTIVE: To investigate the use of a three-dimensional (3D) digital scanning method in determining the accuracy of the wear performance parameters of resin-based composites (RBCs) determined using a two-dimensional (2D) analogue methodology following in-vitro testing in an Academisch Centrum...... for Tandheelkunde Amsterdam (ACTA) wear machine. METHODS: Specimens compatible with the compartments of the ACTA wear machine specimen wheel (n=10) were prepared from one commercial and four experimental RBCs. The RBC specimens were rotated against an antagonist wheel in a food-like slurry for 220,000 wear cycles...

  4. Magnetohydrodynamic cosmologies with a Bertotti-Robinson limit

    International Nuclear Information System (INIS)

    Portugal, R.; Soares, I.D.

    1986-01-01

    A class of cosmological solutions of Einstein-Maxwell equations, which have the Bertotti-Robinson model as an asymptotic configuration is presented. The novel feature of the models is the presence of a conductivity current in Maxwell equations characterizing a regime of magnetohydrodynamics. Exact analytical solutions are exhibited and the solutions may be used as the interior model for the collapse of a self-gravitating bounded fluid with electric conductivity. (Author) [pt

  5. Unique characterization of the Bel-Robinson tensor

    International Nuclear Information System (INIS)

    Bergqvist, G; Lankinen, P

    2004-01-01

    We prove that a completely symmetric and trace-free rank-4 tensor is, up to sign, a Bel-Robinson-type tensor, i.e., the superenergy tensor of a tensor with the same algebraic symmetries as the Weyl tensor, if and only if it satisfies a certain quadratic identity. This may be seen as the first Rainich theory result for rank-4 tensors

  6. Reading Robinson Crusoe from the lens of Islamic Utopianism

    Directory of Open Access Journals (Sweden)

    Morteza Yousofi

    2014-03-01

    Full Text Available The need for perfection is an innate feeling in all human beings and a broader sense of it would be people’s craving to make a utopian society. Utopianism is rooted in religions like Islam, Christianity, Judaism and Hinduism. It is also discussed in many Western works trying to depict an ideal society like Plato’s The Republic and More’s Utopia. The utopian features raised by them are illustrated in many literary works and utopian fictions as is the case with Daniel Defoe’s Robinson Crusoe. This paper attempts to analyze some common Western utopian features presented in Robinson Crusoe and compare them with Islamic traditions which describe the golden era of the Messiah of Islam. By referring to two utopian features of economic prosperity and spirituality, the essay concludes that the discipline of comparative literature provides an opportunity to compare literary works with discussions on Islamic studies and although Robinson Crusoe is set in a Christian context, it has some features in common with the Islamic Utopia.

  7. Tempus Actas – B 3 em Saúde Coletiva

    Directory of Open Access Journals (Sweden)

    Ana Valéria Machado MENDONCA

    2015-10-01

    Full Text Available Parece que foi ontem, quando lançamos em 2007, o volume 1, número 1 da Revista Tempus Actas em Saúde Coletiva, sob a coordenação da Unidade de Tecnologias da Informação e da Comunicação em Saúde do Núcleo de Estudos em Saúde Pública da Universidade de Brasília. Hoje, passados oito anos, a jovem revista científica, nascida no Centro-Oeste do país, tem ocupado cada vez mais espaços de reconhecimento no Brasil e no mundo, graças ao trabalho hercúleo de sua equipe de colaboradores(as, por sua disciplina e atenção aos novos tempos da comunicação científica que regem as produções de elevado rigor científico.

  8. A Romanian Jew in Hollywood: Edward G. Robinson

    Directory of Open Access Journals (Sweden)

    Moldovan Raluca

    2014-08-01

    Full Text Available The present study aims to investigate the contribution that actor Edward G. Robinson brought to the American film industry, beginning with his iconic role as gangster Little Caesar in Mervyn Le Roy’s 1931 production, and continuing with widely-acclaimed parts in classic film noirs such as Double Indemnity, The Woman in the Window and Scarlet Street. Edward G. Robinson was actually a Romanian Jew, born Emmanuel Goldenberg in Bucharest, in 1893, a relatively little known fact nowadays. By examining his biography, filmography and his best-known, most successful films (mentioned above, I show that Edward G. Robinson was one of classical Hollywood’s most influential actors; for instance, traits of his portrayal of Little Caesar (one of the very first American gangster films can be found in almost all subsequent cinematic gangster figures, from Scarface to Vito Corleone. In the same vein, the doomed noir characters he played in Fritz Lang’s The Woman in the Window and Scarlet Street are still considered by film critics today to be some of the finest, most nuanced examples of noir heroes. Therefore, the main body of my article will be dedicated to a more detailed analysis of these films, while the introductory section will trace his biography and discuss some of his better-known films, such as Confessions of a Nazi Spy and Key Largo. The present study highlights Edward G. Robinson’s merits and impact on the cinema industry, proving that this diminutive Romanian Jew of humble origins was indeed something of a giant during Hollywood’s classical era.

  9. Robinson Crusoe: the fate of the British Ulysses.

    Science.gov (United States)

    Pimentel, Juan

    2010-03-01

    If travel has been one of the leitmotifs of Western imagination, Robinson Crusoe has certainly been one of its foremost incarnations. This British Ulysses foretold the global village, but also its problems. He predicted the end of distance, but also the triumph of isolation and anaesthetized loneliness. This paper provides an overview of the connections between Defoe's narrative and the new science and explores two versions of the story by two contemporary writers, Julio Cortazar and John Maxwell Coetzee. 2009 Elsevier Ltd. All rights reserved.

  10. The Value of the Commonwealth: An Ecocritical History of Robinson Forest

    Science.gov (United States)

    Gough, David Barrett

    2013-01-01

    This dissertation provides an ecocritical history of Robinson Forest, a southern Appalachian forest owned by the University of Kentucky. The objective of this dissertation is to examine the literary, environmental, and cultural history of Robinson Forest from its geologic formation to the present, paying particular attention to the production of…

  11. Bel-Robinson energy and the nature of singularities in isotropic cosmologies

    International Nuclear Information System (INIS)

    Klaoudatou, Ifigeneia; Cotsakis, Spiros

    2007-01-01

    We review our recent work on the classification of finite time singularities that arise in isotropic universes. This scheme is based on the exploitation of the Bel Robinson energy in a cosmological setting. We comment on the relation between geodesic completeness and the Bel Robinson energy and present evidence that relates the divergence of the latter to the existence of closed trapped surfaces

  12. Nonsymmetric dynamical thin-shell wormhole in Robinson-Trautman class

    Science.gov (United States)

    Svítek, O.; Tahamtan, T.

    2018-02-01

    The thin-shell wormhole created using the Darmois-Israel formalism applied to Robinson-Trautman family of spacetimes is presented. The stress energy tensor created on the throat is interpreted in terms of two dust streams and it is shown that asymptotically this wormhole settles to the Schwarzschild wormhole with a throat located at the position of the horizon. This behavior shows a nonlinear stability (within the Robinson-Trautman class) of this spherically symmetric wormhole. The gravitational radiation emitted by the Robinson-Trautman wormhole during the transition to spherical symmetry is indistinguishable from that of the corresponding black hole Robinson-Trautman spacetime. Subsequently, we show that the higher-dimensional generalization of Robinson-Trautman geometry offers a possibility of constructing wormholes without the need to violate the energy conditions for matter induced on the throat.

  13. Nonsymmetric dynamical thin-shell wormhole in Robinson-Trautman class

    Energy Technology Data Exchange (ETDEWEB)

    Svitek, O. [Charles University, Institute of Theoretical Physics, Faculty of Mathematics and Physics, Prague (Czech Republic); Tahamtan, T. [Charles University, Institute of Theoretical Physics, Faculty of Mathematics and Physics, Prague (Czech Republic); Czech Academy of Sciences, Astronomical Institute, Prague (Czech Republic)

    2018-02-15

    The thin-shell wormhole created using the Darmois-Israel formalism applied to Robinson-Trautman family of spacetimes is presented. The stress energy tensor created on the throat is interpreted in terms of two dust streams and it is shown that asymptotically this wormhole settles to the Schwarzschild wormhole with a throat located at the position of the horizon. This behavior shows a nonlinear stability (within the Robinson-Trautman class) of this spherically symmetric wormhole. The gravitational radiation emitted by the Robinson-Trautman wormhole during the transition to spherical symmetry is indistinguishable from that of the corresponding black hole Robinson-Trautman spacetime. Subsequently, we show that the higher-dimensional generalization of Robinson-Trautman geometry offers a possibility of constructing wormholes without the need to violate the energy conditions for matter induced on the throat. (orig.)

  14. Digital implementation of AMSACs at Harris and Robinson plants

    International Nuclear Information System (INIS)

    Burjorjee, D.; Stepps, D.

    1988-01-01

    The Code of Federal Regulations was altered in July 1984 to include a section on Requirements for Reduction of Risk from Anticipated Transients Without Scram Events for Light Water Cooled Nuclear Power Plants. For pressurized water reactors the code required equipment diverse from the reactor trip system to automatically initiate the auxiliary (or emergency) feedwater system and initiate a turbine trip under conditions indicative of an anticipated transient without scram (ATWS). The equipment in question is called ATWS mitigation system actuation circuitry (AMSAC). The AMSACs for Carolina Power and Light Company's Shearon Harris and Robinson power plants have been designed and built by Atomic Energy of Canada Limited (AECL) from commercially available components to meet stringent reliability requirements and minimize operational burdens

  15. Area deficits and the Bel–Robinson tensor

    Science.gov (United States)

    Jacobson, Ted; Senovilla, José M. M.; Speranza, Antony J.

    2018-04-01

    The first law of causal diamonds relates the area deficit of a small ball relative to flat space to the matter energy density it contains. At second order in the Riemann normal coordinate expansion, this energy density should receive contributions from the gravitational field itself. In this work, we study the second-order area deficit of the ball in the absence of matter and analyze its relation to possible notions of gravitational energy. In the small ball limit, a reasonable expectation for any proposed gravitational energy functional is that it evaluate to the Bel–Robinson energy density W in vacuum spacetimes. A direct calculation of the area deficit reveals a result that is not simply proportional to W. We discuss how the deviation from W is related to ambiguities in defining the shape of the ball in curved space, and provide several proposals for fixing these shape ambiguities.

  16. Actas de las Conferencias Sanitarias Internacionales (1851-1938.

    Directory of Open Access Journals (Sweden)

    Juan B. Mateos Jiménez

    2005-01-01

    Full Text Available En este breve trabajo se pretende traer a la memoria el recuerdo de las «Conferencias Sanitarias Internacionales» que, en intervalos casi regulares, se celebraron desde 1851 hasta 1938, consistiendo en una serie de reuniones en las que participaron los más importantes sanitarios, higienistas y científicos de cada época, así como los embajadores correspondientes de los más importantes países, intentando unos acuerdos que fuesen conformes para todas las naciones y que evitasen la llegada y extensión de las enfermedades pestilenciales. Esta labor resultaba harto difícil en aquellos tiempos, dado que los participantes se encontraban divididos en dos grandes y potentes grupos: los contagionistas (partidarios de los cordones sanitarios, cuarentenas y lazaretos y los miasmáticos o anticontagionistas (que rechazaban estas medidas y defendían el pleno saneamiento: individual, ambiental y general. Los descubrimientos bacteriológicos que por entonces se fueron produciendo, facilitaron los caminos para un mejor entendimiento entre los participantes en las Conferencias. En este breve trabajo se ofrece un mínimo resumen del contenido de cada una de las mismas. Hay que destacar que estas Conferencias fueron el origen de la Organización Mundial de la Salud. Se mencionan algunas de las dificultades encontradas para conseguir las fotocopias de los textos de las 14 Actas de las Conferencias. Hasta ahora solamente existían en el mundo dos colecciones completas (originales y fotocopias una en la sede de la OMS en Ginebra y otra en la Biblioteca Nacional de Medicina en Bethesda, Md. (USA. Ahora también existen en España, en el Instituto de Salud Carlos III.

  17. The case of Ohio v. Robinson. An 1870 bite mark case.

    Science.gov (United States)

    Pierce, L J; Strickland, D J; Smith, E S

    1990-06-01

    In 1870, Ansil L. Robinson was charged with the murder of his mistress, Mary Lunsford, in Mansfield, Ohio, U.S.A. Evidence against Robinson included an attempt to match his teeth to bite marks on the victim's arm. Robinson was acquitted after a 3-week trial despite the evidence linking his teeth to the wounds. This trial represents an early and perhaps the first attempt to admit bite-mark evidence in a court of law in the United States. The acquittal resulted in the obscurity that prevented this case from coming to the awareness of the forensic dental and legal communities sooner.

  18. ROBINSON, ROUSSEAU, Y RODRIGUEZ: EL NAUFRAGIO DE LA UTOPÍA LATINOAMERICANA EN LA ISLA DE ROBINSON DE ARTURO USLAR PIETRI

    OpenAIRE

    Calderón Le Joliff, Tatiana; Fierro Bustos, Juan Manuel

    2013-01-01

    El presente artículo busca estudiar las relaciones, expuestas en la novela histórica La Isla de Robinson (1981) de Arturo Uslar-Pietri, entre el personaje ficcional y mítico Robinson Crusoe, el filósofo Jean-Jacques Rousseau y el educador utopista Simón Rodríguez. El relato explora el proceso de las independencias latinoamericanas en el siglo XIX a través del personaje de Simón Rodríguez, preceptor de Simón Bolívar, convertido en Samuel Robinson por 26 años. Primero, abordaremos, desde una pe...

  19. Tõsine fotoelamus Dubrovnikus / Wade Goddard, Heidi Levine, Michael Robinson Chaver ; interv. Ahto Külvet

    Index Scriptorium Estoniae

    Goddard, Wade

    2007-01-01

    Dubrovniku vanalinnas asub Sõjafotokeskus. Intervjuu keskuse asutaja, kanadalasest fotograafi Wade Goddardi ja kahe seal augustis avatud näitusel osalenud fotograafi Heidi Levine'i ja Michael Robinson Chavez'iga. Sõjafotograafi tööst

  20. Anticipating Deep Mapping: Tracing the Spatial Practice of Tim Robinson

    Directory of Open Access Journals (Sweden)

    Jos Smith

    2015-07-01

    Full Text Available There has been little academic research published on the work of Tim Robinson despite an illustrious career, first as an artist of the London avant-garde, then as a map-maker in the west of Ireland, and finally as an author of place. In part, this dearth is due to the difficulty of approaching these three diverse strands collectively. However, recent developments in the field of deep mapping encourage us to look back at the continuity of Robinson’s achievements in full and offer a suitable framework for doing so. Socially engaged with living communities and a depth of historical knowledge about place, but at the same time keen to contribute artistically to the ongoing contemporary culture of place, the parameters of deep mapping are broad enough to encompass the range of Robinson’s whole practice and suggest unique ways to illuminate his very unusual career. But Robinson’s achievements also encourage a reflection on the historical context of deep mapping itself, as well as on the nature of its spatial practice (especially where space comes to connote a medium to be worked rather than an area/volume. With this in mind the following article both explores Robinson’s work through deep mapping and deep mapping through the work of this unusual artist.

  1. Ballplayer or barrier breaker? Branding through the seven statues of Jackie Robinson

    OpenAIRE

    Stride, C.; Thomas, F.; Smith, M.M.

    2014-01-01

    Jackie Robinson is the baseball player most frequently depicted by a public statue within the USA, a ubiquity explained by his unique position as barrier breaker of the Major League colour bar. Utilising a detailed inspection of statue designs, locations and inscriptions, and comparisons with wider baseball statuary, Robinson's monuments reveal a distinctive set of cultural projections. These are commemorations distinguished by their age, location away from MLB ballparks, lack of action poses...

  2. Acta informatica medica is indexed in pubmed and archived in pubmed central.

    Science.gov (United States)

    Masic, Izet

    2013-03-01

    Acta Informatica Medica journal has been accepted for archiving in PubMed Central from 2011 onward. The journal started in 1993 as the official journal of the Society for Medical Informatics of Bosnia and Herzegovina. During the last 3 years, Acta Informatica Medica has een included in almost all prestigious online databases, including PubMed, Scopus and EMBASE. The 20th volume of the journal is fully international, with papers from 18 countries.

  3. Congenital mydriasis and prune belly syndrome in a child with an ACTA2 mutation.

    Science.gov (United States)

    Brodsky, Michael C; Turan, Kadriye Erkan; Khanna, Cheryl L; Patton, Alice; Kirmani, Salman

    2014-08-01

    We report the association of congenital mydriasis with prune belly syndrome and cerebrovascular anomalies in a 9-year-old boy who was found to have an ACTA2 mutation. This case illustrates the spectrum of systemic malformations that are attributable to mutations in ACTA2 and expands the spectrum of cerebrovascular anomalies that are now known to accompany congenital mydriasis. Copyright © 2014 American Association for Pediatric Ophthalmology and Strabismus. Published by Elsevier Inc. All rights reserved.

  4. Beitraege zur Astronomiegeschichte, Band 5 (Acta Historica Astronomiae Vol. 18)

    Science.gov (United States)

    Duerbeck, H. W.; Dick, W. R.; Hamel, J.

    2003-01-01

    The 18th volume of the Acta Historica Astronomiae is at the same time the sixth collection of essays on the history of astronomy ("Beitræge zur Astronomiegeschichte, Band 6"), edited by the historians of astronomy W.R. Dick (Potsdam) and J. Hamel (Berlin). Besides a few short notices and book reviews, the book contains eight major articles, which deal with astronomical topics covering the time from the 16th to the 19th centuries. The first article by Michael Weichenhan (Berlin) deals with "the invention of the disk-shaped earth: a chapter of Copernican apologetics". The author shows that the concept of a "disc-shaped Earth" was by no means widespread in the middle ages, but restricted to the father of the church Lactantius and some adherents. Nevertheless, it was used by adherents of Copernicus to show the absurd consequences of a strictly literal biblical interpretation -- here concerning the Earth's shape, disc versus sphere, there the geocentric versus the heliocentric system. This thorough philosophical study is followed by two very short articles. "The measuring accuracy of Tycho's large sextant" by Johann Wünsch investigates O-C values of planet-star distances, as based on Tycho's observations as published in the Historia Coelestis (a compilation, which is also based on Tycho's manuscripts, and published in Regensburg in 1672). The result is that standard deviations are 80 arcseconds for Saturn and 89 arcseconds for Jupiter and Mars, an unexpectedly poor result in view of the general opinion that Tycho was famous for his precision work. "The astronomer Christoph Grienberger and the Galilei trial" by Franz Daxecker deals with a Jesuit astronomer who was both the disciple and successor of the mathematician-astronomer Christopher Clavius at the Collegium Romanum. While he was inclined to Galilei early on, he was forced to propagate Aristotelian doctrine. The brief article is very concise, but extremely tiresome to read (3 pages of pure text are embellished by

  5. Marilynne Robinson, Gilead, and the Battle for the Soul

    Directory of Open Access Journals (Sweden)

    Aronowicz Annette

    2017-07-01

    Full Text Available A widespread view among contemporary philosophers and scientists is that the soul is a mystification. For Marilynne Robinson, American essayist and novelist, the crux of the matter is not the existence of the soul in itself, since this cannot be settled by debate. Rather, she challenges the sort of evidence that her opponents—mostly basing themselves on the work of neuroscientists, and evolutionary biologists—deem to be decisive in determining the question. The soul, she claims, does not appear at the level of our genes and neurons. Rather it is encountered in the many works of art and reflection that human beings have produced from the earliest times. This paper will focus on one such document, Robinson’s novel Gilead (2004, in which she proposes a vision of the soul closely allied to the notion of blessing. Blessing, in turn, is inseparable from metaphor, pointing us to mystery, an elusive reality whose presence we experience only intermittently, although it is always there. Although Robinson’s several collections of essays provide needed context for the view of the soul displayed in the novel, it is our claim that it is the novel that truly turns the tables in the debate, inviting the reader to affirm or deny the soul’s reality not on the basis of the pronouncement of experts but on the basis of the way a given language aligns with experience. The internalization that such a process requires reveals the soul in action. This paper is thus a reading of Robinson’s writings on the soul.

  6. H.B. Robinson-2 pressure vessel benchmark

    Energy Technology Data Exchange (ETDEWEB)

    Remec, I.; Kam, F.B.K.

    1998-02-01

    The H. B. Robinson Unit 2 Pressure Vessel Benchmark (HBR-2 benchmark) is described and analyzed in this report. Analysis of the HBR-2 benchmark can be used as partial fulfillment of the requirements for the qualification of the methodology for calculating neutron fluence in pressure vessels, as required by the U.S. Nuclear Regulatory Commission Regulatory Guide DG-1053, Calculational and Dosimetry Methods for Determining Pressure Vessel Neutron Fluence. Section 1 of this report describes the HBR-2 benchmark and provides all the dimensions, material compositions, and neutron source data necessary for the analysis. The measured quantities, to be compared with the calculated values, are the specific activities at the end of fuel cycle 9. The characteristic feature of the HBR-2 benchmark is that it provides measurements on both sides of the pressure vessel: in the surveillance capsule attached to the thermal shield and in the reactor cavity. In section 2, the analysis of the HBR-2 benchmark is described. Calculations with the computer code DORT, based on the discrete-ordinates method, were performed with three multigroup libraries based on ENDF/B-VI: BUGLE-93, SAILOR-95 and BUGLE-96. The average ratio of the calculated-to-measured specific activities (C/M) for the six dosimeters in the surveillance capsule was 0.90 {+-} 0.04 for all three libraries. The average C/Ms for the cavity dosimeters (without neptunium dosimeter) were 0.89 {+-} 0.10, 0.91 {+-} 0.10, and 0.90 {+-} 0.09 for the BUGLE-93, SAILOR-95 and BUGLE-96 libraries, respectively. It is expected that the agreement of the calculations with the measurements, similar to the agreement obtained in this research, should typically be observed when the discrete-ordinates method and ENDF/B-VI libraries are used for the HBR-2 benchmark analysis.

  7. Review of the Journal Acta Informatica Medica During Eight Year Period: 2008-2015.

    Science.gov (United States)

    Masic, Izet; Begic, Edin; Zunic, Lejla

    2016-04-01

    Acta Informatica Medica is official journal of the Academy for Medical Sciences of Bosnia and Herzegovina (from 2014 Acta Inform Med is published bimonthly). To evaluate journal "Acta Informatica Medica" in 2015 and compare findings to previous years. The study has retrospective and descriptive character, and included the period 2008-2015 (included 36 issues of journal). A total of 83 (average 13,8 articles per journal) articles were published in Acta Informatica Medica during 2015. Analyzing the type of articles, original articles are present in majority during 2015 (68,6%) (by analyzing last eight years, 310 (67,3%) were original). During 2015, 27,7% of articles were related to the applied of Health informatics in field of clinical medicine, 63,8% preclinical medicine and 8,5% to public health. Collaboration rate in 2015 was 0,84. Most often the time required for decision on acceptance of article in 2015 is between 50 and 60 days. Articles came from 16 countries. According to scimagojr.com for 2014, Acta Informatica Medica has SCImago Journal Rank 0,166, while Cites / Doc. (2 years) parameter (widely used as impact index) is 0,70. According to GoogleScholar, h5 index is 11 and h5 median is 19. We analyzed the Acta Informatica Medica by "Publish or Perish" software - H index was 14, g index was 19 and e-index was 10.39. Year after year the highest number of original articles are published. Although the period of revision of articles is acceptable, the period up to two months is certainly not long, the goal is to reduce this period. Although the magazine in mentioned field found its place, although it is indexed in numerous bases, including: PubMed, PubMed Central, SCOPUS, EMBASE, EBSCO, etc. The main goal for next year is that the magazine becomes part of the Web of Science. Imperative is further internationalization of the magazine.

  8. Priscilianistas: Actas del I Concilio de Toledo recopiladas por Bartolomé Carranza

    Directory of Open Access Journals (Sweden)

    Ruiz de Pablos, Francisco

    2001-06-01

    Full Text Available In the current article, the author provides some documents which demonstrate that Bartolomé Carranza, (Archbishop from Toledo was the first person who compiled the «Actas from the 1st Council of Toledo», against the theory sustained by Chadwick since 1978.

    En el presente artículo el autor aporta documentos que demuestran que Bartolomé Carranza, arzobispo de Toledo, fue el primer recopilador de las Actas del I Concilio de Toledo, en contra de la teoría sostenida por Chadwick desde 1978.

  9. Entre Robinson y Frankenstein. Los derechos y los deberes en el “modelo criatural” || Between Robinson and Frankenstein. Rights and Duties in the “Workmanship Model”

    Directory of Open Access Journals (Sweden)

    Ilario Belloni

    2012-12-01

    Full Text Available RESUMEN: A partir de una perspectiva “literaria”, basada en las figuras de los famosos protagonistas de dos novelas modernas (el “marinero” Robinson Crusoe y el “monstruo” Frankenstein, este ensayo examina la relación entre los derechos y los deberes en el “modelo criatural”, con especial referencia a la filosofía jurídica de John Locke, en el intento de denunciar sus límites y proponer su superación. ABSTRACT: On the grounds of a “literary” perspective, based on the figures of the protagonists of two famous modern novels (the “sailor” Robinson Crusoe and the “monster” Frankenstein, this essay investigates the relationship between rights and duties in the so called “workmanship model”, with particular reference to John Locke’s legal philosophy, in the attempt to denounce its limits and try to go beyond it.

  10. Acta Dermatovenerologica Alpina, Pannonica et Adriatica accepted for coverage in Thomson Reuters' Emerging Sources Citation Index (ESCI).

    Science.gov (United States)

    Poljak, Mario; Miljković, Jovan; Triglav, Tina

    2016-09-01

    Acta Dermatovenerologica Alpina, Pannonica et Adriatica (Acta Dermatovenerol APA) is the leading journal in dermatology and sexually transmitted infections in the region. Several important steps were taken during the last 25 years to improve the journal's quality, global visibility, and international impact. After a 1-year trial period, Thomson Reuters recently informed the editorial office that they had accepted Acta Dermatovenerol APA for coverage in Thomson Reuters' new index in the Web of Science Core Collection called the Emerging Sources Citation Index (ESCI). The coverage of Acta Dermatovenerol APA begins with the journal content published online in 2016; that is, from volume 25 onwards.

  11. 75 FR 82414 - Carolina Power & Light Company; H. B. Robinson Steam Electric Plant, Unit No. 2; Exemption

    Science.gov (United States)

    2010-12-30

    ... NUCLEAR REGULATORY COMMISSION [Docket No. 50-261; NRC-2010-0062] Carolina Power & Light Company; H. B. Robinson Steam Electric Plant, Unit No. 2; Exemption 1.0 Background Carolina Power & Light... authorizes operation of the H.B. Robinson Steam Electric Plant, Unit 2 (HBRSEP). The license provides, among...

  12. 75 FR 11579 - Carolina Power & Light Company H. B. Robinson Steam Electric Plant, Unit No. 2; Exemption

    Science.gov (United States)

    2010-03-11

    ... NUCLEAR REGULATORY COMMISSION [Docket No. 50-261; NRC-2010-0062] Carolina Power & Light Company H. B. Robinson Steam Electric Plant, Unit No. 2; Exemption 1.0 Background Carolina Power & Light... of the H. B. Robinson Steam Electric Plant, Unit 2 (HBRSEP). The license provides, among other things...

  13. “Showing respect” in bible translation | van der Spuy | Acta Theologica

    African Journals Online (AJOL)

    Acta Theologica. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 30, No 1 (2010) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF file you selected should load here if ...

  14. “Bond of love”: The action of the spirit | Williams | Acta Theologica

    African Journals Online (AJOL)

    Acta Theologica. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 34, No 2 (2014) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF file you selected should load here if ...

  15. Twentieth-century English Bible translations | Naudé | Acta Theologica

    African Journals Online (AJOL)

    Acta Theologica. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 25, No 2 (2005) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF file you selected should load here if ...

  16. New York Newspaper Coverage of Jackie Robinson in His First Major League Season.

    Science.gov (United States)

    Washburn, Pat

    Sports articles appearing in three New York City newspapers in Jackie Robinson's first season as a major league baseball player were examined to determine if there was biased reporting based on racial prejudice. The sports pages of the New York "Times," the "Herald Tribune," and the "Daily News" for 44 days in 1947…

  17. A Light Touch to Learning: Jackie Robinson Middle School, New Haven, Ct.

    Science.gov (United States)

    Progressive Architecture, 1979

    1979-01-01

    The architectural design of Jackie Robinson Middle School in New Haven, Connecticut, minimizes the school's size by siting it to reveal only one level at its entrance. Extensive use of transparent and translucent materials projects openness and light. (Author/MLF)

  18. Exact cosmological solutions of Einstein-Maxwell equations as perturbations of the Bertotti-Robinson model

    International Nuclear Information System (INIS)

    Portugal, R.; Soares, I.D.

    1985-01-01

    Two new classes of spatially homogeneous cosmological solutions of Einstein-Maxwell equations are obtained by considering a class of exact perturbations of the static Bertotti-Robinson (BR) model. The BR solution is shown to be unstable under these perturbations, being perturbed into exact cosmological solutions with perfect fluid (equations of state p = lambda rho, O [pt

  19. Income and Democracy: A Comment on Acemoglu, Johnson, Robinson, and Yared (2008)

    DEFF Research Database (Denmark)

    Paldam, Martin; Gundlach, Erich

    Acemoglu, Johnson, Robinson, and Yared (2008) demonstrate that estimation of the standard adjustment model with country-fixed and time-fixed effects removes the statistical significance of income as a causal factor of democracy. We argue that their empirical approach must produce insignificant...

  20. The Dark Knight Rises: In "42" Jackie Robinson Saves the American Dream

    Science.gov (United States)

    Beck, Bernard

    2014-01-01

    The movie "42" shows memorable events that have faded from our view in recent years. The events are important to the evolution of a multicultural society in America because of the importance of baseball to the common national culture that all the American people have created. Jackie Robinson's significance as a cultural hero is…

  1. Applications of the Peng-Robinson Equation of State Using MATLAB[R

    Science.gov (United States)

    Nasri, Zakia; Binous, Housam

    2009-01-01

    A single equation of state (EOS) such as the Peng-Robinson (PR) EOS can accurately describe both the liquid and vapor phase. We present several applications of this equation of state, including estimation of pure component properties and computation of the vapor-liquid equilibrium (VLE) diagram for binary mixtures. We perform high-pressure…

  2. Citation analysis of Acta Dermatovenerologica Alpina, Pannonica et Adriatica: 1992-2011.

    Science.gov (United States)

    Ostrbenk, Anja; Skamperle, Mateja; Poljak, Mario

    2012-09-01

    Acta Dermatovenerologica Alpina, Pannonica et Adriatica is small regional professional journal that started publishing in 1992. Despite the journal's relatively narrow readership, it has significantly improved its quality and global profile during the last 20 years, as shown in this citation analysis update. Since 1992, 654 bibliographical items have been published. Among these, 545 (83.4%) were considered WoS citable items and 109 (16.6%) WoS noncitable items. Since 2008, 90% of all published items have been considered WoS citable items and received an average of 1.9 citations per item. The predicted Acta Dermatovenerol APA impact factor calculated using data from a Cited Reference search of Thomson Scientific's Web of Science has shown steep and continuous increase since 2006, when the journal acquired full indexing status in Index Medicus/Medline, and has been above 0.5 since 2008.

  3. Acta Alexandrinorum: questionamento dos Alexandrinos às praticas imperiais romanas

    Directory of Open Access Journals (Sweden)

    Joana Campos Clímaco

    2009-12-01

    Full Text Available The aim of this article is to illustrate the context of criticism and questioning towards the roman power in a documentation named by its editors as Acta Alexandrinorum. Through the analyses of common themes present in the selected texts, the main idea of is to investigate the initial motivation for the writing of the texts, that were spread as a kind of literary resistance of the Alexandrians towards the Empire in the II and III centuries.

  4. R179H mutation in ACTA2 expanding the phenotype to include prune-belly sequence and skin manifestations.

    Science.gov (United States)

    Richer, J; Milewicz, D M; Gow, R; de Nanassy, J; Maharajh, G; Miller, E; Oppenheimer, L; Weiler, G; O'Connor, M

    2012-03-01

    Mutations in ACTA2 (smooth muscle cell-specific isoform of α-actin) lead to a predisposition to thoracic aortic aneurysms and other vascular diseases. More recently, the ACTA2 R179H mutation has been described in individuals with global smooth muscle dysfunction. We report a patient heterozygous for the mutation in ACTA2 R179H who presented with megacystis at 13 weeks gestational age and, at birth, with prune-belly sequence. He also had deep skin dimples and creases on his palms and soles, a finding not previously described but possibly related to ACTA2. To our knowledge, this is the first report of the R179H mutation in ACTA2 in a child with prune-belly sequence. We think the R179H mutation in ACTA2 should be included in the differential diagnosis of individuals presenting with the sequence without an identified mechanical obstruction. Furthermore, as ACTA2 R179H has been reported in patients with severe vasculomyopathy and premature death, we recommend that molecular testing for this mutation be considered in fetuses presenting with fetal megacystis with a normal karyotype, particularly if the bladder diameter is 15 mm or more, to allow expectant parents to make an informed decision. Copyright © 2012 Wiley Periodicals, Inc.

  5. Entre Robinson y Frankenstein. Los derechos y los deberes en el “modelo criatural” || Between Robinson and Frankenstein. Rights and Duties in the “Workmanship Model”

    Directory of Open Access Journals (Sweden)

    Ilario Belloni

    2012-12-01

    Full Text Available RESUMEN:A partir de una perspectiva “literaria”, basada en las figuras de los famosos protagonistas de dos novelas modernas (el “marinero” Robinson Crusoe y el “monstruo” Frankenstein, este ensayo examina la relación entre los derechos y los deberes en el “modelo criatural”, con especial referencia a la filosofía jurídica de John Locke, en el intento de denunciar sus límites y proponer su superación.ABSTRACT:On the grounds of a “literary” perspective, based on the figures of the protagonists of two famous modern novels (the “sailor” Robinson Crusoe and the “monster” Frankenstein, this essay investigates the relationship between rights and duties in the so called “workmanship model”, with particular reference to John Locke’s legal philosophy, in the attempt to denounce its limits and try to go beyond it.

  6. Nariai, Bertotti-Robinson, and anti-Nariai solutions in higher dimensions

    International Nuclear Information System (INIS)

    Cardoso, Vitor; Dias, Oscar J.C.; Lemos, Jose P.S.

    2004-01-01

    We find all higher dimensional solutions of Einstein-Maxwell theory that are the topological product of two manifolds of constant curvature. These solutions include the higher dimensional Nariai, Bertotti-Robinson and anti-Nariai solutions and the anti-de Sitter Bertotti-Robinson solutions with toroidal and hyperbolic topology (Plebanski-Hacyan solutions). We give explicit results for any dimension D≥4. These solutions are generated from the appropriate extremal limits of the higher dimensional near-extreme black holes in de Sitter and anti-de Sitter backgrounds. Thus, we also find the mass and charge parameters of higher dimensional extreme black holes as a function of the radius of the degenerate horizon

  7. Effect of dipole-quadrupole Robinson mode coupling upon the beam response to radio-frequency phase noise

    Directory of Open Access Journals (Sweden)

    R. A. Bosch

    2006-09-01

    Full Text Available In an electron storage ring, coupling between dipole and quadrupole Robinson oscillations modifies the spectrum of longitudinal beam oscillations driven by radio-frequency (rf generator phase noise. In addition to the main peak at the resonant frequency of the coupled dipole Robinson mode, another peak occurs at the resonant frequency of the coupled quadrupole mode. To describe these peaks analytically for a quadratic synchrotron potential, we include the dipole and quadrupole modes when calculating the beam response to generator noise. We thereby obtain the transfer function from generator-noise phase modulation to beam phase modulation with and without phase feedback. For Robinson-stable bunches confined in a synchrotron potential with a single minimum, the calculated transfer function agrees with measurements at the Aladdin 800-MeV electron storage ring. The transfer function is useful in evaluating phase feedback that suppresses Robinson oscillations in order to obtain quiet operation of an infrared beam line.

  8. The role of heuristics in automated theorem proving J.A Robinson's resolution principle

    OpenAIRE

    Coderschi, Roberto

    1996-01-01

    The aim of this paper is to show how J.A. Robinson's resolution principle was perceived and discussed in the AI community between the mid sixties and the first seventies. During this time the so called ``heuristic search paradigm" was still influential in the AI community, and both resolution principle and certain resolution based, apparently human-like, search strategies were matched with those problem solving heuristic procedures which were representative of the AI heuristic search paradigm.

  9. The identity and distribution of Fiorinia phantasma (Cockerell & Robinson) (Hemiptera: Coccomorpha: Diaspididae), with a new synonym.

    Science.gov (United States)

    Watson, Gillian W; Williams, Douglas J; Miller, Douglass R

    2015-11-25

    The morphologies of Fiorinia phantasma (Cockerell & Robinson) (Hemiptera: Coccomorpha: Diaspididae) and F. coronata Williams & Watson are reviewed, and the name F. coronata is placed as a junior synonym of the name F. phantasma syn. n. The known geographical distribution and host range of F. phantasma is documented and discussed. An identification key to 12 of the 16 species of Fiorinia known from the Australasian, Nearctic and Neotropical Regions is provided.

  10. Terpenos y flavonoides de ageratina fastigiata (H.B.K. King & Robinson

    Directory of Open Access Journals (Sweden)

    Rubén Torrenegra G.

    2010-07-01

    Full Text Available De los extractos lipofílicos tanto de hojas como de flores, se aislaron e identificaron dos derivados del kaurano: el ent-kauran-16B-ol y el entkauran-] 6,20-diol y, dos flavonas metoxiladas: la 5-hidroxi-7,4'-dimetoxiflavona y la 5-hidroxi-3,7,4'-trimetoxi-flavona, Los dos diterpenos confirman la ubicación taxonómica de dicha especie según King y Robinson.

  11. TERPENOS Y FLAVONOIDES DE Ageratina fastigiata (H.B.K. King & Robinson

    Directory of Open Access Journals (Sweden)

    Ruben Torrenegra G.

    2010-09-01

    Full Text Available De los extractos lipofílicos tanto de hojas como de flores, se aislaron e identificaron dos derivados del kaurano: el ent-kauran-16B-ol y el entkauran-] 6,20-diol y, dos flavonas metoxiladas: la 5-hidroxi-7,4' dimetoxiflavona y la 5-hidroxi-3,7,4'-trimetoxi-flavona, Los dos diterpenos confirman la ubicación taxonómica de dicha especie según King y Robinson.

  12. Lieb-Robinson Bound and the Butterfly Effect in Quantum Field Theories.

    Science.gov (United States)

    Roberts, Daniel A; Swingle, Brian

    2016-08-26

    As experiments are increasingly able to probe the quantum dynamics of systems with many degrees of freedom, it is interesting to probe fundamental bounds on the dynamics of quantum information. We elaborate on the relationship between one such bound-the Lieb-Robinson bound-and the butterfly effect in strongly coupled quantum systems. The butterfly effect implies the ballistic growth of local operators in time, which can be quantified with the "butterfly" velocity v_{B}. Similarly, the Lieb-Robinson velocity places a state-independent ballistic upper bound on the size of time evolved operators in nonrelativistic lattice models. Here, we argue that v_{B} is a state-dependent effective Lieb-Robinson velocity. We study the butterfly velocity in a wide variety of quantum field theories using holography and compare with free-particle computations to understand the role of strong coupling. We find that v_{B} remains constant or decreases with decreasing temperature. We also comment on experimental prospects and on the relationship between the butterfly velocity and signaling.

  13. Decreasing the emittance using a multi-period Robinson wigglers in TPS

    Energy Technology Data Exchange (ETDEWEB)

    Huamg, C. W., E-mail: huang.zw@nsrrc.org.tw [Department of Physics, National Tsing Hua University Hsinchu 30043, Taiwan (China); Hwang, C. S., E-mail: cshwang@nsrrc.org.tw [NSRRC, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan (China); Department of Electrophysics, National Chiao Tung University, Hsinchu 300, Taiwan (China); Lee, S. Y., E-mail: shylee@indiana.edu [Department of Physics, Indiana University (United States)

    2016-07-27

    The Taiwan Photon Source (TPS) has been successfully commissioned. However, the minimum emittance in the TPS lattice is 1.6 nm rad. In the existing TPS storage ring lattice, it is imperative to reduce the emittance to below 1 nm rad. Therefore, a feasibility study for reducing the effective emittance of the TPS storage ring by using a Robinson wiggler was launched; the reduction is necessary to enhance the photon brilliance. In this study, a permanent-magnet multiperiod Robinson wiggler (MRW) was developed for use instead of the single-period Robinson wiggler. In general, the quadruple field of a combined function magnet in the storage ring is approximately few tesla per meter. According to beam dynamic analysis, we found that it is necessary to adopt a high gradient (40 T/m) combined-function MRW magnet to reduce the emittance effectively. Therefore, a high gradient field strength is required in the combined function MRW magnet. In this study, the quadrupole field strength of the MRW magnet was allowed to be approximately 40 T/m at a magnet gap of 20 mm. The period length of the MRW magnet was 300 mm and the period number was 16. The of MRWs is discussed in regard to the possibility of increasing the photon brilliance from IU22.

  14. Dasyrhynchus pacificus Robinson, 1965 (Trypanorhyncha: Dasyrhynchidae description of the adult form Descrição da forma adulta de Dasyrhynchus pacificus Robinson, 1965 (Trypanorhyncha: Dasynrhynchidae

    Directory of Open Access Journals (Sweden)

    Sergio Carmona de São Clemente

    1989-03-01

    Full Text Available One out of four specimens of sharks, Carcharhinus brachyurus (Günther, 1860, captured off the southern Brazilian Coast, harboured cestodes identified as Dasyrhynchus pacificus Robinson, 1965, of which the adult form is now described and referred as ocurring in Brazil.Um entre quatro espécimes de Carcharhinus brachyurus (Günther, 1860, coletados na costa sul brasileira, estava parasitado por cestóides pertencentes ao gênero Dasyrhynchus Pintner, 1928. Os espécimes foram identificados como D. pacificus Ribinson, 1965, sendo este o primeiro registo da ocorrência desta espécie no Brasil. Nesta oportunidade, é pela primeira vez apresentada a descrição da forma adulta, embora sem o proglotide grávido.

  15. Autosomal dominant distal myopathy due to a novel ACTA1 mutation.

    Science.gov (United States)

    Liewluck, Teerin; Sorenson, Eric J; Walkiewicz, Magdalena A; Rumilla, Kandelaria M; Milone, Margherita

    2017-08-01

    Mutations in skeletal muscle α-actin 1-encoding gene (ACTA1) cause autosomal dominant or recessive myopathies with marked clinical and pathological heterogeneity. Patients typically develop generalized or limb-girdle pattern of weakness, but recently a family with scapuloperoneal myopathy was reported. We describe a father and 2 children with childhood-to-juvenile onset distal myopathy, carrying a novel dominant ACTA1 variant, c.757G>C (p.Gly253Arg). Father had delayed motor development and developed significant proximal weakness later in life; he was initially misdiagnosed as having spinal muscular atrophy based on electromyographic findings. His children had predominant anterior distal leg and finger extensor involvement. Nemaline rods were abundant on the daughter's biopsy, absent on the father's initial biopsy, and extremely rare on the father's subsequent biopsy a decade later. The father's second biopsy also showed myofibrillar pathology and rare fibers with actin filament aggregates. The present family expands the spectrum of actinopathy to include a distal myopathy. Copyright © 2017 Elsevier B.V. All rights reserved.

  16. Thermodynamic consistency test procedure using orthogonal collocation and the Peng-Robinson equation of state

    International Nuclear Information System (INIS)

    Hamm, L.L.; Van Brunt, V.

    1982-08-01

    The Christiansen and Fredenslund programs for calculating vapor-liquid equilibria have been modified by replacing the Soave-Redlich-Kwong equation of state with the newly developed Peng-Robinson equation of state. This modification was shown to be a decided improvement for high pressure systems, especially in the critical and upper retrograde regions. Thermodynamic consistency tests were developed and used to evaluate and compare calculated values from both the modified and unmodified programs with reported experimental data for several vapor-liquid systems

  17. Reversal of Opinion: The Implications of the Work of Acemoglu and Robinson for Marxist Thought

    OpenAIRE

    Petith, Howard

    2008-01-01

    This paper describes the implications for Marxist thought of the work of Daron Acemoglu and James Robinson. In the first two periods of this they explained how the rise of democracy brought prosperity to Europe  and why the same process had not worked in Latin America because of the possibility of coups. The implication is that mass poverty can better be alleviated by safeguarding democracy rather than moving to socialism. In the last period A and R have formalized doubts about the efficacy o...

  18. Calculation of NARM's Equilibrium with Peng-Robinson Equation of State

    Institute of Scientific and Technical Information of China (English)

    LI Tingxun; GUO Kaihua; WANG Ruzhu; FAN Shuanshi

    2001-01-01

    The liquid molar volumes of nonazeotropic refrigerant mixtures (NARM), calculated with Peng Robinson (PR)equation, were compared with vapor -liquid equilibrium experimental data in this paper. Provided with coreaction coefficient kij, the discrepancies of liquid molar volume data for R22+Rl14 and R22+R142b using PR equation are 7.7% and 8.1% , respectively. When HBT (Hankinson-Brobst-Thomson) equation was joined with PR equation, the deviations are reduced to less than 1.5% for both R22+Rl14 and R22+R142b.

  19. Wistrand Robinson Lila, Eight Years in the Amazon Headwaters. My Life in Three Peruvian Tribes

    OpenAIRE

    Erikson, Philippe

    2014-01-01

    Lila Wistrand de Robinson, ancienne membre du Summer Institute of Linguistics (SIL) bien connue des spécialistes de l’ethnologie et de la linguistique ouest-amazoniennes, nous livre ici le récit des années qu’elle a passées sur le terrain au Pérou, entre 1956 et 1965, chez les Shapra, les Aguaruna et (surtout) les Cashibo-Cacataibo. L’ouvrage est illustré de nombreuses photos noir et blanc, d’un charme sans doute désuet, mais d’une indéniable valeur documentaire. Eight years… contient une qua...

  20. The ACTA PORT-score for predicting perioperative risk of blood transfusion for adult cardiac surgery.

    Science.gov (United States)

    Klein, A A; Collier, T; Yeates, J; Miles, L F; Fletcher, S N; Evans, C; Richards, T

    2017-09-01

    A simple and accurate scoring system to predict risk of transfusion for patients undergoing cardiac surgery is lacking. We identified independent risk factors associated with transfusion by performing univariate analysis, followed by logistic regression. We then simplified the score to an integer-based system and tested it using the area under the receiver operator characteristic (AUC) statistic with a Hosmer-Lemeshow goodness-of-fit test. Finally, the scoring system was applied to the external validation dataset and the same statistical methods applied to test the accuracy of the ACTA-PORT score. Several factors were independently associated with risk of transfusion, including age, sex, body surface area, logistic EuroSCORE, preoperative haemoglobin and creatinine, and type of surgery. In our primary dataset, the score accurately predicted risk of perioperative transfusion in cardiac surgery patients with an AUC of 0.76. The external validation confirmed accuracy of the scoring method with an AUC of 0.84 and good agreement across all scores, with a minor tendency to under-estimate transfusion risk in very high-risk patients. The ACTA-PORT score is a reliable, validated tool for predicting risk of transfusion for patients undergoing cardiac surgery. This and other scores can be used in research studies for risk adjustment when assessing outcomes, and might also be incorporated into a Patient Blood Management programme. © The Author 2017. Published by Oxford University Press on behalf of the British Journal of Anaesthesia. All rights reserved. For Permissions, please email: journals.permissions@oup.com

  1. A program to compute the soft Robinson-Foulds distance between phylogenetic networks.

    Science.gov (United States)

    Lu, Bingxin; Zhang, Louxin; Leong, Hon Wai

    2017-03-14

    Over the past two decades, phylogenetic networks have been studied to model reticulate evolutionary events. The relationships among phylogenetic networks, phylogenetic trees and clusters serve as the basis for reconstruction and comparison of phylogenetic networks. To understand these relationships, two problems are raised: the tree containment problem, which asks whether a phylogenetic tree is displayed in a phylogenetic network, and the cluster containment problem, which asks whether a cluster is represented at a node in a phylogenetic network. Both the problems are NP-complete. A fast exponential-time algorithm for the cluster containment problem on arbitrary networks is developed and implemented in C. The resulting program is further extended into a computer program for fast computation of the Soft Robinson-Foulds distance between phylogenetic networks. Two computer programs are developed for facilitating reconstruction and validation of phylogenetic network models in evolutionary and comparative genomics. Our simulation tests indicated that they are fast enough for use in practice. Additionally, the distribution of the Soft Robinson-Foulds distance between phylogenetic networks is demonstrated to be unlikely normal by our simulation data.

  2. Auxiliary feedwater system risk-based inspection guide for the H. B. Robinson nuclear power plant

    International Nuclear Information System (INIS)

    Moffitt, N.E.; Lloyd, R.C.; Gore, B.F.; Vo, T.V.; Garner, L.W.

    1993-08-01

    In a study sponsored by the US Nuclear Regulatory Commission (NRC), Pacific Northwest Laboratory has developed and applied a methodology for deriving plant-specific risk-based inspection guidance for the auxiliary feedwater (AFW) system at pressurized water reactors that have not undergone probabilistic risk assessment (PRA). This methodology uses existing PRA results and plant operating experience information. Existing PRA-based inspection guidance information recently developed for the NRC for various plants was used to identify generic component failure modes. This information was then combined with plant-specific and industry-wide component information and failure data to identify failure modes and failure mechanisms for the AFW system at the selected plants. H. B. Robinson was selected as one of a series of plants for study. The product of this effort is a prioritized listing of AFW failures which have occurred at the plant and at other PWRs. This listing is intended for use by NRC inspectors in the preparation of inspection plans addressing AFW risk-important components at the H. B. Robinson plant

  3. Hierarchical Self Assembly of Patterns from the Robinson Tilings: DNA Tile Design in an Enhanced Tile Assembly Model.

    Science.gov (United States)

    Padilla, Jennifer E; Liu, Wenyan; Seeman, Nadrian C

    2012-06-01

    We introduce a hierarchical self assembly algorithm that produces the quasiperiodic patterns found in the Robinson tilings and suggest a practical implementation of this algorithm using DNA origami tiles. We modify the abstract Tile Assembly Model, (aTAM), to include active signaling and glue activation in response to signals to coordinate the hierarchical assembly of Robinson patterns of arbitrary size from a small set of tiles according to the tile substitution algorithm that generates them. Enabling coordinated hierarchical assembly in the aTAM makes possible the efficient encoding of the recursive process of tile substitution.

  4. 76 FR 77022 - In the Matter of Carolina Power & Light Company, H.B. Robinson Steam Electric Plant, Unit No. 2...

    Science.gov (United States)

    2011-12-09

    ... and 72-3] In the Matter of Carolina Power & Light Company, H.B. Robinson Steam Electric Plant, Unit No. 2, H. B. Robinson Steam Electric Plant, Unit 2, Independent Spent Fuel Storage Installation; Order Approving Indirect Transfer of Control of Licenses I. Carolina Power & Light Company (CP&L, the licensee) is...

  5. Elsevier’s CiteScore index values for Acta Dermatovenerologica Alpina, Pannonica et Adriatica: a 2016 update

    Science.gov (United States)

    Šterbenc, Anja; Oštrbenk, Anja

    2017-09-01

    Elsevier’s recently launched citation metric CiteScore enables comprehensive, transparent, and current evaluation of a journal’s performance. For an editorial office, insight into a journal’s impact over time is of great value when making important decisions regarding the journal’s future. A 2016 update of CiteScore index values for Acta Dermatovenerologica Alpina, Pannonica et Adri- atica (Acta Dermatovenerol APA) showed a slight decrease in the CiteScore index value from 1.18 in 2015 to 0.96 in 2016. Acta Dermatovenerol APA can still be considered the principal journal in the field of dermatology and sexually transmitted infections in our region, with almost half of the articles published between 2013 and 2015 cited at least once in 2016. Acta Dermatovenerol APA performed well in both categories listed because it ranked 67th out of 121 journals in the category Dermatology (44th percentile) and 175th out of 250 journals in the category Infectious Diseases (30th percentile).

  6. Vergifnis in die gebed van Daniël (Dan. 9:4-19) | O'Kennedy | Acta ...

    African Journals Online (AJOL)

    Everyone is guilty - the guilt is not placed on a certain person or king (cf. v. 7); (4) Forgiveness is meant for the "international" Israel and not limited to a specific geographical area. Keywords: Ou Testament, Gebed, Vergifnis, Daniel 9: 4-19, Old Testament, Prayer, Forgiveness Acta Theologica Vol.22(1) 2003: 135-149.

  7. TetR-dependent gene regulation in intracellular Listeria monocytogenes demonstrates the spatiotemporal surface distribution of ActA.

    Science.gov (United States)

    Schmitter, Sibylle; Fieseler, Lars; Klumpp, Jochen; Bertram, Ralph; Loessner, Martin J

    2017-08-01

    To enable specific and tightly controlled gene expression both in vitro and during the intracellular lifecycle of the pathogen Listeria monocytogenes, a TetR-dependent genetic induction system was developed. Highest concentration of cytoplasmic TetR and best repression of tetO-controlled genes was obtained by tetR expression from the synthetic promoter Pt 17 . Anhydrotetracycline (ATc) as inducer permitted concentration-dependent, fine-tuned expression of genes under control of the tetO operator and a suitable promoter. The actin-polymerizing ActA protein represents a major virulence factor of L. monocytogenes, required for actin-based motility and cell-to-cell spread in infected host cells. To be able to observe its spatial and temporal distribution on intracellular L. monocytogenes cells, conditional mutants featuring actA placed under TetR control were used to infect PtK2 epithelial cells. Following induction at different time intervals, the subsequent recruitment of actin by L. monocytogenes could be monitored. We found that cells displayed functional ActA after approximately 15 min, while formation of polarized actin tail was complete after 90-120 min. At this point, intracellular motility of the induced mutants was indistinguishable from wild-type bacteria. Interestingly, de novo ActA synthesis in intracellular Listeria also demonstrated the temporal, asymmetric redistribution of the membrane-anchored proteins from the lateral walls toward the cell poles. © 2017 John Wiley & Sons Ltd.

  8. 76 FR 66333 - Carolina Power & Light Company, H.B. Robinson Steam Electric Plant, Unit No. 2; Environmental...

    Science.gov (United States)

    2011-10-26

    ... NUCLEAR REGULATORY COMMISSION [Docket No. 50-261; NRC-2011-0247] Carolina Power & Light Company, H.B. Robinson Steam Electric Plant, Unit No. 2; Environmental Assessment and Finding of No Significant... Facility Operating License No. DPR-23, issued to Carolina Power & Light Company (the licensee), for...

  9. Two-Phase Fluid Simulation Using a Diffuse Interface Model with Peng--Robinson Equation of State

    KAUST Repository

    Qiao, Zhonghua; Sun, Shuyu

    2014-01-01

    In this paper, two-phase fluid systems are simulated using a diffusive interface model with the Peng-Robinson equation of state (EOS), a widely used realistic EOS for hydrocarbon fluid in the petroleum industry. We first utilize the gradient theory

  10. Lieb-Robinson bounds for multi-commutators and applications to response theory

    CERN Document Server

    Bru, J -B

    2017-01-01

    Lieb-Robinson bounds for multi-commutators are effective mathematical tools to handle analytic aspects of infinite volume dynamics of non-relativistic quantum particles with short-range, possibly time-dependent interactions. In particular, the existence of fundamental solutions is shown for those (non-autonomous) C*-dynamical systems for which the usual conditions found in standard theories of (parabolic or hyperbolic) non-autonomous evolution equations are not given. In mathematical physics, bounds on multi-commutators of an order higher than two can be used to study linear and non-linear responses of interacting particles to external perturbations. These bounds are derived for lattice fermions, in view of applications to microscopic quantum theory of electrical conduction discussed in this book. All results also apply to quantum spin systems, with obvious modifications. In order to make the results accessible to a wide audience, in particular to students in mathematics with little Physics background, basics...

  11. Stephen K. Robinson arrives at KSC for the STS-95 launch

    Science.gov (United States)

    1998-01-01

    STS-95 Mission Specialist Stephen K. Robinson, arrives at Kennedy Space Center's Shuttle Landing Facility aboard a T-38 jet as part of final preparations for launch. The STS-95 mission, targeted for liftoff at 2 p.m. on Oct. 29, includes research payloads such as the Spartan solar-observing deployable spacecraft, the Hubble Space Telescope Orbital Systems Test Platform, the International Extreme Ultraviolet Hitchhiker, as well as the SPACEHAB single module with experiments on space flight and the aging process. The mission is expected to last 8 days, 21 hours and 49 minutes, and return to KSC on Nov. 7. The other STS-95 crew members are Mission Commander Curtis L. Brown Jr., Pilot Steven W. Lindsey, Mission Specialist Scott E. Parazynski, Payload Specialist John H. Glenn Jr., senator from Ohio, Mission Specialist Pedro Duque, with the European Space Agency (ESA), and Payload Specialist Chiaki Mukai, with the National Space Development Agency of Japan (NASDA).

  12. William Davis Robinson: Trader, Agent, and Defender of Spanish American Independence, 1799-1819

    Directory of Open Access Journals (Sweden)

    Johanna Von Grafenstein

    2017-01-01

    Full Text Available Este artículo propone una relectura de las acciones y escritos del comerciante estadounidense William Davis Robinson en el contexto de la literatura de viaje de los siglos XVIII y XIX , que ha sido examinado en décadas recientes por algunos autores. Este trabajo se basa en el concepto de “viajeros de revoluciones”, bajo el cual entendemos individuos que se encuentran en un país, región o ciudad de manera temporal, que se ven a sí mismos como visitantes u observadores ex - ternos, describen y analizan un proceso político o social de transformación con una mirada externa y escriben para un público externo. Este trabajo analiza dos textos: Una somera visión de la América española , publicado en 1815, y Memorias de la Revolución Mexicana , que apareció en 1820. En este artículo se sostiene y se busca demostrar que las Memorias de Robinson pueden ser entendidas como literatura de viaje favorable a la “revolución mexicana”, mientras que el segundo texto constituye una informada descripción de los recursos existentes y las posibili - dades de relaciones comerciales con México y los demás países de América del Sur, una vez que estos hayan ganado su independencia. Este texto constituye también un manifiesto que proclama a los Estados Unidos como líder y guar - dián de la libertad en este hemisferio, en oposición a las potencias europeas, como España y Gran Bretaña.

  13. Gender analysis of papers published in ACTAS ESPANOLAS DE PSIQUIATRIA (1999-2006).

    Science.gov (United States)

    Alonso-Arroyo, A; González-Alcaide, G; Bolaños Pizarro, M; Castelló Cogollos, L; Valderrama-Zurián, J C; Aleixandre-Benavent, R

    2008-01-01

    The governments and organizations responsible for scientific policies try to encourage equality of gender, among their priorities that of obtaining equal participation and full integration of women in all aspects of the scientific profession. The study analyzes the scientific production of women in the areas of Psychiatry by means of the bibliometric study of the papers published in ACTAS ESPANOLAS DE PSIQUIATRIA. A total of 458 papers published from 1999- 2006 period were downloaded from the Science Citation Index-Expanded database, these including original research papers, review articles and clinical cases. A bibliometric study broken down by gender was carried out to determine the existence or inequalities between men and women regarding scientific productivity, type of document, order of author signatures, on the institutional and geographical level. The papers were published by 1,194 different authors. The gender of 977 authors was identified, 587 (60.08%) men and 390 (39.92%) women. The percentage of women authorship has risen from 29.92% in 1999 to 38.86% in 2006. A total of 42.92% of authors having one published article were women, while (those with more than nine articles) only accounted for 33%. Bibliometric studies on scientific activity provide essential information to promote gender equality. An annual increase over 1% in the number of female authors in the journal has been observed, which if it continues will lead to a parity in coming years.

  14. The Acta Comparationis Litterarum Universarum (1877–1888 from the Perspective of its British Collaborators

    Directory of Open Access Journals (Sweden)

    Annamária Codău

    2017-09-01

    Full Text Available Within a contemporary Hungarian literary discourse that emphasized national values, the first international journal of comparative literature, Acta Comparationis Litterarum Universarum (ACLU proved quite incomprehensible. I therefore argue that ACLU’s aims and constant struggles are better understood from the viewpoint of its authors originating from beyond Hungary, such as that held by the English collaborator, E. D. Butler. A librarian at the British Museum whose interest in antiquarianism and orientalism may have fueled his involvement in ACLU’s translation projects, Butler can be considered one of the most important channels for propagating Hungarian literature in England. A comparison of Hungarian and English perspectives reveals how differently ACLU’S goals were interpreted, how comparative literature and Hungarian Studies/Hungarology were balanced according to the project proposed by the journal’s editors, Meltzl and Brassai. This analysis further examines how this negotiation surrounding the journal’s interpretation came to determine the early period of institutional comparative literature. Similarly, the Hungarian and English press’s reactions to this project reveal the paradoxical position ACLU occupied; for Hungarians, ACLU was not “Hungarian” enough, while it was precisely this “Hungarianness” that attracted the English. My paper discusses the underlying reasons for this situation by examining how Hungarians, the English and ACLU addressed questions in folklore, Hungarian and comparative literature studies, thereby providing additional insight into the journal’s concept of world literature and its anthropological approach.

  15. Intellectual Property and the Tourism Industry: From ACTA Protests towards a Restrictive Interpretation of Innovation Regulations

    Directory of Open Access Journals (Sweden)

    Speriusi-Vlad Alin

    2014-01-01

    Full Text Available In 2012 became reality James Boyle’s desire exposed in his essay from 1997 regarding a politics of intellectual property concerning the great deal of attention that must be paid to the Intellectual Property. At that time Boyle was disappointed by the lack of attention from lawyers, scholars, legal academics and the media for the Clinton administration’s proposal for copyright on the Net, a document that provided the blueprint of domestic and international regulatory efforts to expand intellectual property rights. Certainly this was not the case with ACTA where the public media forced by the private citizen’s protests tried to weight both the benefits and the costs of the new protection standards brought by the new international convention. After those moments Intellectual Property regulations are no more an esoteric and arcane field, something that is only interesting and comprehensible to the practitioners in the field, but a matter of public interests like the environment which arouse the attention of all the persons. In this way we all become aware that intellectual property radiates beyond the legal frame and interferes with several aspects of our lives, including our free time and the tourism consequently.

  16. Generation of an efficient artificial promoter of bovine skeletal muscle α-actin gene (ACTA1) through addition of cis-acting element.

    Science.gov (United States)

    Hu, Qian; Tong, Huili; Zhao, Dandan; Cao, Yunkao; Zhang, Weiwei; Chang, Shuwei; Yang, Yu; Yan, Yunqin

    2015-03-01

    The promoter of skeletal muscle α-actin gene (ACTA1) is highly muscle specific. The core of the bovine ACTA1 promoter extends from +29 to -233, about 262 base pairs (bp), which is sufficient to activate transcription in bovine muscle satellite cells. In this study, analysis by PCR site-specific mutagenesis showed that the cis-acting element SRE (serum response element binding factor) was processed as a transcriptional activator. In order to enhance the bovine ACTA1 promoter's activity, we used a strategy to modify it. We cloned a fragment containing three SREs from the promoter of ACTA1, and then one or two clones were linked upstream of the core promoter (262 bp) of ACTA1. One and two clones increased the activity of the ACTA1 promoter 3-fold and 10-fold, respectively, and maintained muscle tissue specificity. The modified promoter with two clones could increase the level of ACTA1 mRNA and protein 4-fold and 1.1-fold, respectively. Immunofluorescence results showed that green fluorescence of ACTA1 increased. Additionally, the number of total muscle microfilaments increased. These genetically engineered promoters might be useful for regulating gene expression in muscle cells and improving muscle mass in livestock.

  17. Analysis of historical articles published in Actas Urológicas Españolas.

    Science.gov (United States)

    Pérez-Albacete, M

    On the 40th anniversary of the edition of Actas Urológicas Españolas, we assess the articles on history to determine the proportion represented, analysing the study subjects and their relevance, getting to know the authors, the main study centres and the interest that the studies offer for understanding the specialty. We extracted as many subjects of historic content from the journal as were published between January 1976 and December 2016. There were 103 historical studies representing 3% of the total number of articles, with a mean of 2.57 articles published annually, written by 127 separate urologists. As first author, there were 59 articles, and as coauthors, there were 68. The main activity came from 21 of the main university hospitals in Spain, and 43 of the articles were personal articles signed by a single individual. Their content mainly covers the facts of Spanish urology from the Renaissance to the 20th century, with special emphasis on the profile of Spanish specialists. Data on 22 of these specialists are provided in 37 articles. The evolution of diagnostic and treatment procedures, both medical and surgical, are well reflected, as are a number of diseases. Most of the studies are personal works of historical research and represent 3% of the total number of articles. As a whole, the quality is high, and the articles provide data with interesting details and useful reviews, giving them considerable value, as well as forming a precious compendium for the understanding of the history of Spanish urology. These articles are highly recommended reading. Copyright © 2017 AEU. Publicado por Elsevier España, S.L.U. All rights reserved.

  18. O projeto Picar o Ponto: Memórias orais de operários da Fábrica Robinson

    Directory of Open Access Journals (Sweden)

    Célia Gonçalves Tavares

    2014-06-01

    Full Text Available Picar o ponto, aludindo a um gesto do quotidiano dos operários, foi o título que de imediato nos surgiu quando se pensou uma atividade para manter viva a ligação aos trabalhadores da Fábrica Robinson, que encerrou as suas portas no início de 2009. Com Picar o ponto o operário regressa à Fábrica... Vem picar o ponto, e traz consigo o que entender necessário para contar a sua história com a fábrica: objetos, fotografias, documentos... ou apenas memórias. Integrado na atual programação do Museu Robinson, com a atividade Dia 17 Acontece, cria-se um espaço para a partilha de experiências pessoais através de relatos biográficos. Pretende-se com esta iniciativa aproximar os cidadãos ao espaço da fábrica, sensibilizando-os para a importância do património industrial, cruzando abordagens de especialistas de várias áreas do património cultural e operários num mesmo espaço-tempo. Num registo de participação pessoal procura-se estreitar laços com os antigos operários enquanto agentes fundamentais para a memória da Fábrica Robinson e como elementos essenciais na construção do projeto para o espaço Robinson em Portalegre, cidade portuguesa do Norte Alentejano com forte tradição industrial.

  19. Ultrarelativistic boost of a black hole in the magnetic universe of Levi-Civita-Bertotti-Robinson

    Science.gov (United States)

    Ortaggio, Marcello; Astorino, Marco

    2018-05-01

    We consider an exact Einstein-Maxwell solution constructed by Alekseev and Garcia, which describes a Schwarzschild black hole immersed in the magnetic universe of Levi-Civita, Bertotti, and Robinson (LCBR). After reviewing the basic properties of this spacetime, we study the ultrarelativistic limit in which the black hole is boosted to the speed of light, while sending its mass to 0. This results in a nonexpanding impulsive wave traveling in the LCBR universe. The wave front is a 2-sphere carrying two null point particles at its poles—a remnant of the structure of the original static spacetime. It is also shown that the obtained line element belongs to the Kundt class of spacetimes, and the relation with the known family of exact gravitational waves of finite duration propagating in the LCBR background is clarified. In the limit of a vanishing electromagnetic field, one point particle is pushed away to infinity and the single-particle Aichelburg-Sexl p p -wave propagating in Minkowski space is recovered.

  20. Efficiency versus speed in quantum heat engines: Rigorous constraint from Lieb-Robinson bound

    Science.gov (United States)

    Shiraishi, Naoto; Tajima, Hiroyasu

    2017-08-01

    A long-standing open problem whether a heat engine with finite power achieves the Carnot efficiency is investgated. We rigorously prove a general trade-off inequality on thermodynamic efficiency and time interval of a cyclic process with quantum heat engines. In a first step, employing the Lieb-Robinson bound we establish an inequality on the change in a local observable caused by an operation far from support of the local observable. This inequality provides a rigorous characterization of the following intuitive picture that most of the energy emitted from the engine to the cold bath remains near the engine when the cyclic process is finished. Using this description, we prove an upper bound on efficiency with the aid of quantum information geometry. Our result generally excludes the possibility of a process with finite speed at the Carnot efficiency in quantum heat engines. In particular, the obtained constraint covers engines evolving with non-Markovian dynamics, which almost all previous studies on this topic fail to address.

  1. Joachim Heinrich Campe’s Robinson the Younger: Universal Moral Foundations and Intercultural Relations

    Directory of Open Access Journals (Sweden)

    Claudia Nitschke

    2016-06-01

    Full Text Available In his adaptation of Robinson Crusoe, Campe sets out to examine the legitimacy of his contemporary social reality (in Europe in the broadest sense by tracing its origin back to the most basic roots conceivable. The experimental character of his book is emphasised and—to an extent—explicitly introduced through the frame narrative which constitutes Campe’s most important addition to Defoe’s story: Here the emergence of the rules and routines are extensively mooted by the father (who relates Robinson’s story as a framed narrative and his children who still have to internalise, grasp, and situate the moral rules around them and frequently offer divergent perspectives in the process. The frame narrative connects the moral “ontogeny” of the children to the “phylogenetics” of civilisation and suggests that both can be superimposed on one another. I will work with concepts that focus on the differentiation between “innate” moral characteristics and their social transformation on a cognitive, evolutionary level, from which Campe clearly deviates. However, his short-circuiting of the individual and the phylogeny leads to very similar specifications as laid out by, for instance, Moral Foundations Theory.

  2. The reproductive biology of Sophora fernandeziana (Leguminosae), a vulnerable endemic species from Isla Robinson Crusoe.

    Science.gov (United States)

    Bernardello, Gabriel; Aguilar, Ramiro; Anderson, Gregory J

    2004-02-01

    Sophora fernandeziana is the only legume endemic to Isla Robinson Crusoe (Archipelago Juan Fernández, Chile); it is uncommon and becoming rare. Although its preservation status is listed as "vulnerable," as with many species, little is known of its reproductive biology. Flowering phenology, floral morphology, nectar features, breeding system, and visitors were analyzed in two populations. Flowering is from late winter to early spring. Flowers last 6 d and have a number of ornithophilous features. A floral nectary begins to secrete highly concentrated nectar 48 h after flowers open. Nectar secretion increases as the flower ages but culminates in active nectar reabsorption as the flower senesces. Nectar production is negatively affected by nectar removal. Self-pollen germinates and tubes grow down the style. However, pollen tubes were only observed to enter the ovaries in open pollinated styles, suggesting the possibility of an ovarian self-incompatibility mechanism. Both sexes of the two hummingbird species that inhabit the island are regular visitors. Low fruit and seed set, low genetic diversity, and a shrinking number of populations all contribute to increased concern about the future of this species-and perhaps the hummingbirds that depend on it.

  3. Modification of Peng Robinson EOS for modelling (vapour + liquid) equilibria with electrolyte solutions

    International Nuclear Information System (INIS)

    Baseri, Hadi; Lotfollahi, Mohammad Nader

    2011-01-01

    Highlights: → Extended PR-EOS was presented for VLE of H 2 O/Salt/CO 2 systems at high pressure. → The proposed EPR-EOS is based upon contributions to the Helmholtz energy. → Born, Margules, and Debye-Huckel or mean spherical approximation terms were used. → Two different mixing rules Panagiotopoulos and Reid and Kwak and Mansoori (KM) were used. → A combination of KM mixing rule with DH term results more accurate VLE results. - Abstract: A modification of the extended Peng-Robinson equation of state (PR-EOS) is presented to describe the (vapour + liquid) equilibria of systems containing water and salts. The modification employs three additional terms including a Born term, a Margules term and two terms separately used for estimation of the long-range electrostatic interactions (the Debye-Huckel (DH) or the mean spherical approximation (MSA) terms). Effects of two mixing rules, first, the Panagiotopoulos and Reid mixing rule (PR) and, second, the Kwak and Mansoori mixing rule (KM), on the final values of VLE calculations are also investigated. The results show that the KM mixing rule is more appropriate than the PR mixing rule. The proposed equation of state is used to calculate the (vapour + liquid) equilibrium (VLE) of the systems containing (water + sodium sulphate + carbon dioxide) and (water + sodium chloride + carbon dioxide) at high pressure. The comparison of calculated results with the experimental data shows that a combination of KM mixing rule with the DH term results a more accurate VLE values.

  4. Review of thermal-hydraulic calculations for Calvert Cliffs and H.B. Robinson PTS study

    International Nuclear Information System (INIS)

    Jo, J.H.; Yuelys-Miksis, C.; Rohatgi, U.S.

    1984-01-01

    Thermal-hydraulic transient calculations performed by LANL using the TRAC-PF1 code and by INEL using the RELAP5 code for the USNRC pressurized thermal shock (PTS) study of the Calvert Cliffs and H.B. Robinson Nuclear Power Plants have been reviewed at BNL including the input decks and steady state calculations. Furthermore, six transients for each plant have been selected for the in-depth review. Simple hand calculations based on the mass and energy balances of the entire reactor system, have been performed to predict the temperature and pressure of the reactor system, and the results have been compared with those obtained by the code calculation. In general, the temperatures and pressures of the primary system calculated by the codes have been very reasonable. The secondary pressures calculated by TRAC appear to indicate that the codes have some difficulty with the condensation model and further work is needed to assess the code calculation of the U-tube steam generator pressure when the cold auxiliary feedwater is introduced to the steam generator. However, it is not expected that this uncertainty would affect the transient calculations significantly

  5. Book Review: Beitraege zur Astronomiegeschichte, Band 5 (Acta Historica Astronomiae Vol. 15)

    Science.gov (United States)

    Duerbeck, H. W.; Dick, W. R.; Hamel, J.

    2002-12-01

    The 15th volume of the Acta Historica Astronomiae is at the same time the fifth collection of essays on the history of astronomy (Beitraege zur Astronomiegeschichte, Band 5), edited by the historians of astronomy W.R. Dick (Potsdam) and J. Hamel (Berlin). Besides a few short notices and book reviews, the book contains 11 major articles, which deal with astronomical topics covering the time from the 16th to the 20th centuries. The first article, on the analysis and interpretation of historical horoscopes as a source of the history of science, is based on the inaugural lecture of its author, Guenther Oestmann. After a general introduction, which deals with the principles of horoscope making, the author discusses the horoscope of Count Heinrich Ranzau (1526-1598), the Danish governor of Schleswig-Holstein, who was a friend of Tycho Brahe. Oestmann shows that the astronomical-mathematical basis of such a horoscope can be reconstructed and interpreted. However, it is hardly possible to gain an insight in the process how the interpretation of a horoscope was done in detail. The second and third articles, by Franz Daxecker, deal with Athanasius Kircher and Christoph Scheiner, two catholic astronomers of the 17th century. Kircher's Organum Mathematicum is a calculating device that can be used in the fields of arithmetic, geometry, chronology, astronomy, astrology and others. The author provides extracts of the description of the Organum taken from a book by Caspar Schott, which deal with chronology and astronomy. A photograph of the Organum indicates that this tool consists of a set of tables glued on wooden or cardboard, but details of its contents and applications remain pretty obscure for the reader - a few elaborated examples would have been helpful. The second paper deals with the life of Christoph Scheiner SJ, the co-discoverer of sunspots (next to Galileo), after leaving Rome in 1633 - the year of the Galileo trial. Scheiner spent his later years in the Austrian and

  6. A.C.T.A. and the effects of the agreement on the on-line marketing strategies

    Directory of Open Access Journals (Sweden)

    Boitor, A.–B.

    2012-01-01

    Full Text Available This article presents the most controversial and discussed treaty over the last period and its consequences on the marketing strategies of different companies in fields such as the movie industry, the music industry and the publishing domain. The A.C.T.A. treaty was signed by over 27 countries, and brings up positive effects upon the strategies of those companies which suffer losses from piracy and counterfeiting of intellectual property rights. The paper reflects the changes that the treaty can bring especially to the online marketing strategies of the biggest movie studios and music production labels.

  7. An α-smooth muscle actin (acta2/αsma zebrafish transgenic line marking vascular mural cells and visceral smooth muscle cells.

    Directory of Open Access Journals (Sweden)

    Thomas R Whitesell

    Full Text Available Mural cells of the vascular system include vascular smooth muscle cells (SMCs and pericytes whose role is to stabilize and/or provide contractility to blood vessels. One of the earliest markers of mural cell development in vertebrates is α smooth muscle actin (acta2; αsma, which is expressed by pericytes and SMCs. In vivo models of vascular mural cell development in zebrafish are currently lacking, therefore we developed two transgenic zebrafish lines driving expression of GFP or mCherry in acta2-expressing cells. These transgenic fish were used to trace the live development of mural cells in embryonic and larval transgenic zebrafish. acta2:EGFP transgenic animals show expression that largely mirrors native acta2 expression, with early pan-muscle expression starting at 24 hpf in the heart muscle, followed by skeletal and visceral muscle. At 3.5 dpf, expression in the bulbus arteriosus and ventral aorta marks the first expression in vascular smooth muscle. Over the next 10 days of development, the number of acta2:EGFP positive cells and the number of types of blood vessels associated with mural cells increases. Interestingly, the mural cells are not motile and remain in the same position once they express the acta2:EGFP transgene. Taken together, our data suggests that zebrafish mural cells develop relatively late, and have little mobility once they associate with vessels.

  8. A Componentwise Convex Splitting Scheme for Diffuse Interface Models with Van der Waals and Peng--Robinson Equations of State

    KAUST Repository

    Fan, Xiaolin

    2017-01-19

    This paper presents a componentwise convex splitting scheme for numerical simulation of multicomponent two-phase fluid mixtures in a closed system at constant temperature, which is modeled by a diffuse interface model equipped with the Van der Waals and the Peng-Robinson equations of state (EoS). The Van der Waals EoS has a rigorous foundation in physics, while the Peng-Robinson EoS is more accurate for hydrocarbon mixtures. First, the phase field theory of thermodynamics and variational calculus are applied to a functional minimization problem of the total Helmholtz free energy. Mass conservation constraints are enforced through Lagrange multipliers. A system of chemical equilibrium equations is obtained which is a set of second-order elliptic equations with extremely strong nonlinear source terms. The steady state equations are transformed into a transient system as a numerical strategy on which the scheme is based. The proposed numerical algorithm avoids the indefiniteness of the Hessian matrix arising from the second-order derivative of homogeneous contribution of total Helmholtz free energy; it is also very efficient. This scheme is unconditionally componentwise energy stable and naturally results in unconditional stability for the Van der Waals model. For the Peng-Robinson EoS, it is unconditionally stable through introducing a physics-preserving correction term, which is analogous to the attractive term in the Van der Waals EoS. An efficient numerical algorithm is provided to compute the coefficient in the correction term. Finally, some numerical examples are illustrated to verify the theoretical results and efficiency of the established algorithms. The numerical results match well with laboratory data.

  9. Inferring species trees from incongruent multi-copy gene trees using the Robinson-Foulds distance

    Science.gov (United States)

    2013-01-01

    Background Constructing species trees from multi-copy gene trees remains a challenging problem in phylogenetics. One difficulty is that the underlying genes can be incongruent due to evolutionary processes such as gene duplication and loss, deep coalescence, or lateral gene transfer. Gene tree estimation errors may further exacerbate the difficulties of species tree estimation. Results We present a new approach for inferring species trees from incongruent multi-copy gene trees that is based on a generalization of the Robinson-Foulds (RF) distance measure to multi-labeled trees (mul-trees). We prove that it is NP-hard to compute the RF distance between two mul-trees; however, it is easy to calculate this distance between a mul-tree and a singly-labeled species tree. Motivated by this, we formulate the RF problem for mul-trees (MulRF) as follows: Given a collection of multi-copy gene trees, find a singly-labeled species tree that minimizes the total RF distance from the input mul-trees. We develop and implement a fast SPR-based heuristic algorithm for the NP-hard MulRF problem. We compare the performance of the MulRF method (available at http://genome.cs.iastate.edu/CBL/MulRF/) with several gene tree parsimony approaches using gene tree simulations that incorporate gene tree error, gene duplications and losses, and/or lateral transfer. The MulRF method produces more accurate species trees than gene tree parsimony approaches. We also demonstrate that the MulRF method infers in minutes a credible plant species tree from a collection of nearly 2,000 gene trees. Conclusions Our new phylogenetic inference method, based on a generalized RF distance, makes it possible to quickly estimate species trees from large genomic data sets. Since the MulRF method, unlike gene tree parsimony, is based on a generic tree distance measure, it is appealing for analyses of genomic data sets, in which many processes such as deep coalescence, recombination, gene duplication and losses as

  10. Modified Peng-Robinson Equation of State for Pure and Mixture Refrigerants with R-32,R-125 and R-134a

    Science.gov (United States)

    Ll, Jin; Sato, Haruki; Watanabe, Koichi

    On the basis of critically-evaluated thermodynamic property data among those recently published, a new Peng-Robinson equation of state for the HFC refrigerants,R-32,R-125 and R-134a,has be end eveloped so as to represent the VLE properties in the vapor-liquid coexisting phase at temperatures 223K-323K. In accord with a challenge to correlate the binary and/or ternary interatction parameters as functions of temperature, we have also applied the present modified Peng-Robinson equation of state to the promising alternative HFC refrigerant mixtures, i.e., R-32/125,R-32/134a and R-32/125/134a systems. The developed equation of state improves significantly its effectiveness for practical engineering property calculations at refrigerantion and air-conditioning industries in comparison with conventional Peng-Robinson equation.

  11. “Abused, neglected,—unhonoured,—unrewarded”: The Economics of Authorial Labor in the Writings of Mary Robinson

    Directory of Open Access Journals (Sweden)

    Jennifer L. Airey

    2016-04-01

    Full Text Available This essay examines one of the central preoccupations of Mary Robinson’s authorial career, a concern with the poor financial treatment of authors. Writers, Robinson suggests, are demeaned by predatory publishers, heartless or anti-intellectual aristocratic patrons, and a disinterested, distractible reading public, none of whom care to compensate the author for the labors of her pen. In a culture that neither recognizes nor rewards female intellect, women authors are particularly vulnerable, but Robinson’s criticisms transcend the problems caused by gender alone; male authors, too, could fall into penury when their labor was insufficiently valued. Rejecting the Romantic ethos of the solitary genius dying for his art, Robinson calls for a reassessment of authorship’s value, not only as a social and cultural good, but as a valid form of work; she insists that mental labor is labor in the economic sense of the term, and that it deserves compensation with a living wage. Her writings are thus marked by a keen sense of disgust at a culture that neither recognizes economic value in literary creation, nor feels obligated to remunerate the artist for her creations.

  12. Robinson Crusoé em Foe: Coetzee Lê Defoe com as lentes do pós-colonialismo

    Directory of Open Access Journals (Sweden)

    Wellington Ricardo Fioruci

    2015-06-01

    Full Text Available Este estudo consiste na análise de dois importantes romances representativos do gênero narrativa de viagem, a saber, Robinson Crusoé (1719 e Foe (1986, cujos autores, respectivamente Daniel Defoe, no século XVIII, e John Maxwell Coetzee, no século XX, dialogam também ao escreverem na língua de Shakespeare. Partindo desses cruzamentos, busca-se estabelecer, através do comparativismo literário, as relações históricas e textuais entre suas respectivas obras. O romance Foe aparece como uma releitura contemporânea do gênero relatos de viagem, o qual já havia sido desenvolvido em Robinson Crusoé, romance precursor desta categoria temática. Coetzee retoma o clássico tecendo reflexões a respeito do contexto colonialista em que Defoe escrevia. Desse modo, Coetzee lança um novo olhar para o tema sob o enfoque do pós-colonialismo. Tal perspectiva reflete no modo de escritura do texto, de forma que o gênero, reflexo da imagem de uma época, acaba sendo reconstruído, de acordo com a perspectiva pós-moderna.

  13. Twenty years of society of medical informatics of b&h and the journal acta informatica medica.

    Science.gov (United States)

    Masic, Izet

    2012-03-01

    In 2012, Health/Medical informatics profession celebrates five jubilees in Bosnia and Herzegovina: a) Thirty five years from the introduction of the first automatic manipulation of data; b) Twenty five years from establishing Society for Medical Informatics BiH; c) Twenty years from establishing scientific and professional journal of the Society for Medical Informatics of Bosnia and Herzegovina "Acta Informatica Medica"; d) Twenty years from establishing first Cathdra for Medical Informatics on biomedical faculties in Bosnia and Herzegovina and e) Ten years from the introduction of "Distance learning" in medical curriculum. All of the five mentioned activities in the area of Medical informatics had special importance and gave appropriate contribution in the development of Health/Medical informatics in Bosnia And Herzegovina.

  14. Thirty-two years of Acta Neophilologica - with gratitude to its founder and editor Professor Janez Stanonik

    Directory of Open Access Journals (Sweden)

    Mirko Jurak

    2000-12-01

    Full Text Available In spring this year Professor Janez Stanonik decided to retire as the Editor of the scholarly journal Acta Neophilologica, which he founded in 1968 and edited for thirty-two years. I endeavoured to help him with the material side of the journal from the very beginning until1995; since then this task has been performed by the present Associate Editor. At the time when Janez Stanonik began publishing this journal, his main aim was to make our research work in Western European and American literature better known to scholars all over the world. However, in a few years' time the journal also became open to scholars from other countries and other fields, particularly in areas connected with Slovene literature and culture, Slovene immigrant literature, and linguistics. I believe that this approach gave the journal a new openness and that it enriched its quality, therefore I intend to follow this policy in the future too.

  15. Modeling solubilities of gases in the ionic liquid 1-ethyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate using the Peng-Robinson equation of state

    NARCIS (Netherlands)

    Althuluth, M.A.M.; Berrouk, A.S.; Kroon, M.C.; Peters, C.J.

    2014-01-01

    In this paper, vapor–liquid equilibrium (VLE) data of binary mixtures containing gases such as carbon dioxide (CO2), methane, ethane, propane, or butane in the ionic liquid 1-ethyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate ([emim][FAP]) have been modeled using the Peng–Robinson

  16. Modeling Pore-Scale Oil-Gas Systems Using Gradient Theory with Peng-Robinson Equation of State

    KAUST Repository

    Fan, Xiaolin

    2016-06-01

    This research addresses a sequential convex splitting method for numerical simulation of multicomponent two-phase fluids mixture in a single-pore at constant temperature, which is modeled by the gradient theory with Peng-Robinson equation of state. The gradient theory of thermodynamics and variational calculus are utilized to obtain a system of chemical equilibrium equations which are transformed into a transient system as a numerical strategy on which the numerical scheme is based. The proposed numerical algorithm avoids computing Hessian matrix arising from the second-order derivative of homogeneous contribution of free energy; it is also quite robust. This scheme is proved to be unconditionally component-wise energy stable. The Raviart-Thomas mixed finite element method is applied to spatial discretization.

  17. A Numerical Comparison of Soave Redlich Kwong and Peng-Robinson Equations of State for Predicting Hydrocarbons’ Thermodynamic Properties

    Directory of Open Access Journals (Sweden)

    B. Hussain

    2018-02-01

    Full Text Available Mixture phase equilibrium and thermodynamic properties have a significant role in industry. Numerical analysis of flash calculation generates an appropriate solution for the problem. In this research, a comparison of Soave Redlich Kwong (SRK and Peng-Robinson (PR equations of state predicting the thermodynamic properties of a mixture of hydrocarbon and related compounds in a critical region at phase equilibrium is performed. By applying mathematical modeling of both equations of states, the behavior of binary gases mixtures is monitored. The numerical analysis of isothermal flash calculations is applied to study the pressure behavior with volume and mole fraction. The approach used in this research shows considerable convergence with experimental results available in the literature.

  18. Modeling Pore-Scale Oil-Gas Systems Using Gradient Theory with Peng-Robinson Equation of State

    KAUST Repository

    Fan, Xiaolin; Kou, Jisheng; Qiao, Zhonghua; Sun, Shuyu

    2016-01-01

    This research addresses a sequential convex splitting method for numerical simulation of multicomponent two-phase fluids mixture in a single-pore at constant temperature, which is modeled by the gradient theory with Peng-Robinson equation of state. The gradient theory of thermodynamics and variational calculus are utilized to obtain a system of chemical equilibrium equations which are transformed into a transient system as a numerical strategy on which the numerical scheme is based. The proposed numerical algorithm avoids computing Hessian matrix arising from the second-order derivative of homogeneous contribution of free energy; it is also quite robust. This scheme is proved to be unconditionally component-wise energy stable. The Raviart-Thomas mixed finite element method is applied to spatial discretization.

  19. Optimizing the dynamic response of the H.B. Robinson nuclear plant using multiobjective particle swarm optimization

    International Nuclear Information System (INIS)

    Elsays, Mostafa A.; Naguib Aly, M.; Badawi, Alya A.

    2009-01-01

    In this paper, the Particle Swarm Optimization (PSO) algorithm is modified to deal with Multiobjective Optimization Problems (MOPs). A mathematical model for predicting the dynamic response of the H. B. Robinson nuclear power plant, which represents an Initial Value Problem (IVP) of Ordinary Differential Equations (ODEs), is solved using Runge-Kutta formula. The resulted data values are represented as a system of nonlinear algebraic equations by interpolation schemes for data fitting. This system of fitted nonlinear algebraic equations represents a nonlinear multiobjective optimization problem. A Multiobjective Particle Swarm Optimizer (MOPSO) which is based on the Pareto optimality concept is developed and applied to maximize the above mentioned problem. Results show that MOPSO efficiently cope with the problem and finds multiple Pareto optimal solutions. (orig.)

  20. Strong indication of an extinction-based saturation of the flora on the Pacific Robinson Crusoe Islands.

    Science.gov (United States)

    Greimler, Josef; Schulze, Christian H; López Sepúlveda, Patricio; Novoa, Patricio; Gatica, Alejandro; Reiter, Karl; Wessely, Johannes; Baeza, Carlos; Peñailillo, Patricio; Ruiz, Eduardo; Stuessy, Tod

    2018-03-01

    Oceanic islands are vulnerable ecosystems and their flora has been under pressure since the arrival of the first humans. Human activities and both deliberately and inadvertently introduced biota have had and continue to have a severe impact on island endemic plants. The number of alien plants has increased nearly linearly on many islands, perhaps resulting in extinction-based saturation of island floras. Here, we provide evidence for such a scenario in Alejandro Selkirk, Robinson Crusoe Islands (Archipelago Juan Fernández, Chile). We compared species richness and species composition of historical vegetation samples from 1917 with recent ones from 2011. Changes in species' relative occurrence frequency were related to their taxonomic affiliation, dispersal mode, distribution status, and humidity and temperature preferences. While total species richness of vascular plants remained relatively similar, species composition changed significantly. Plants endemic to the Robinson Crusoe Islands declined, exotic species increased substantially within the period of ca. 100 years. Further, the relative occurrence frequency of plants with preferences for very warm and humid climate decreased, while the opposite was found for plants preferring drier and colder environments. Potential drivers responsible for this dramatic shift in the vegetation within only one century might have been the large goat population affecting especially small populations of endemic plants and climatic changes. Taking into account a substantial extinction debt, we expect further shifts in the vegetation of this small oceanic island toward alien plants. This would have significant negative consequences on global biodiversity, considering that island floras contribute substantially to global plant species richness due to their high proportion of endemics.

  1. Two-Phase Fluid Simulation Using a Diffuse Interface Model with Peng--Robinson Equation of State

    KAUST Repository

    Qiao, Zhonghua

    2014-01-01

    In this paper, two-phase fluid systems are simulated using a diffusive interface model with the Peng-Robinson equation of state (EOS), a widely used realistic EOS for hydrocarbon fluid in the petroleum industry. We first utilize the gradient theory of thermodynamics and variational calculus to derive a generalized chemical equilibrium equation, which is mathematically a second-order elliptic partial differential equation (PDE) in molar density with a strongly nonlinear source term. To solve this PDE, we convert it to a time-dependent parabolic PDE with the main interest in its final steady state solution. A Lagrange multiplier is used to enforce mass conservation. The parabolic PDE is then solved by mixed finite element methods with a semi-implicit time marching scheme. Convex splitting of the energy functional is proposed to construct this time marching scheme, where the volume exclusion effect of an EOS is treated implicitly while the pairwise attraction effect of EOS is calculated explicitly. This scheme is proved to be unconditionally energy stable. Our proposed algorithm is able to solve successfully the spatially heterogeneous two-phase systems with the Peng-Robinson EOS in multiple spatial dimensions, the first time in the literature. Numerical examples are provided with realistic hydrocarbon components to illustrate the theory. Furthermore, our computational results are compared with laboratory experimental data and verified with the Young-Laplace equation with good agreement. This work sets the stage for a broad extension of efficient convex-splitting semi-implicit schemes for numerical simulation of phase field models with a realistic EOS in complex geometries of multiple spatial dimensions.

  2. Comment on "Exposure to mercury and Aroclor 1268 congeners in least terns (Sternula antillarum) in coastal Georgia, USA" by G. L. Robinson, G. L. Mills, A. H. Lindell, S. H. Schweitzer and S. M. Hernandez, Environmental Science: Processes & Impacts, 2015, 17, 1424.

    Science.gov (United States)

    Fuchsman, P C; Henning, M H; Magar, V S

    2016-02-01

    In a recent paper published in this journal (Robinson et al., Environmental Science: Processes & Impacts, 2015, 17, 1424), Robinson et al. reported concentrations of Aroclor 1268 congeners in least tern eggs in coastal Georgia, USA. This comment describes important omissions in Robinson et al.'s interpretation of those egg concentrations that alter the overall conclusions of the least tern study.

  3. La revista Acta Universitaria: su Trayectoria a Diez años de su Publicación Inicial

    Directory of Open Access Journals (Sweden)

    Esperanza R. Vargas Pacheco

    2012-02-01

    Full Text Available In the latter part of the XIX century Don Vicente Fernández, professor of the Colegio del Estado, proposed that a journal should be edited covering scientific themes such as mathematics, physics, chemistry, zoology, botany, mineralogy and astronomy. His idea became a reality when in 1991 the Universidad de Guanajuato edited a journal,Acta Universitaria, with the characteristics that he had proposed. Ever since 17 issues have been published containing articles that come from different disciplines including sciences, social sciences, humanities, business and economics. A great number of these articles have been contributions of professors in the areas of agriculture, biology, chemistry, physics, medicine and engineering. In addition, other topics covered have been philosophy and other humanities. In the present article the evolution of the journal is examined to determine how many national and international articles have been published in the journal and the contribution of the academic units of the Universidad de Guanajuato as well. Desde fines del siglo XIX Don Vicente Fernández, profesor del Colegio del Estado propuso que se editara una publicación periódica que versara sobre temas científicos como Matemáticas, Física, Química, Zoología, Botánica, Mineralogía y Astronomía. A partir de 1991 la Universidad de Guanajuato edita una revista con tal propósito que es Acta Universitaria. De esta publicación se han editado con el presente 17 números que contienen artículos en las distintas áreas del conocimiento, incluyendo las científicas, sociales, humanísticas y económico-administrativas. De los artículos publicados la mayor parte han sido contribuciones de profesores del área de ciencias agrícolas, biología, química, física, médicas e ingenierías. Aunque también existe una aportación importante de filosofía y en general de las humanidades. Se revisa la revista y su evolución analizando cuantas y que instituciones

  4. Coverage of Acta Dermatovenerologica Alpina, Pannonica et Adriatica in Elsevier's CiteScore index: a new tool for measuring the citation impact of academic journals.

    Science.gov (United States)

    Poljak, Mario

    2017-03-01

    In December 2016, Elsevier launched a new tool that helps measure the citation impact of academic journals, called the CiteScore index. The CiteScore index values for 2015 confirmed the status of Acta Dermatovenerologica Alpina, Pannonica et Adriatica (Acta Dermatovenerol APA) as the leading journal in dermatology and sexually transmitted infections in the region. Sixty-five articles published in Acta Dermatovenerol APA from 2012 to 2014 received a total of 77 citations in 2015, resulting in a CiteScore index value of 1.18 for the journal. More than half of the articles published from 2012 to 2014 received at least one citation in 2015. Acta Dermatovenerol APA performed well in all three categories listed because it is ranked 384th out of 1,549 journals in the category General Medicine (75th percentile), 53rd out of 122 journals in the category Dermatology (56th percentile), and 142nd out of 246 journals in the category Infectious Diseases (42nd percentile).

  5. A Novel Regulatory Mechanism of Smooth Muscle α-Actin Expression by NRG-1/circACTA2/miR-548f-5p Axis.

    Science.gov (United States)

    Sun, Yan; Yang, Zhan; Zheng, Bin; Zhang, Xin-Hua; Zhang, Man-Li; Zhao, Xue-Shan; Zhao, Hong-Ye; Suzuki, Toru; Wen, Jin-Kun

    2017-09-01

    Neuregulin-1 (NRG-1) includes an extracellular epidermal growth factor-like domain and an intracellular domain (NRG-1-ICD). In response to transforming growth factor-β1, its cleavage by proteolytic enzymes releases a bioactive fragment, which suppresses the vascular smooth muscle cell (VSMC) proliferation by activating ErbB (erythroblastic leukemia viral oncogene homolog) receptor. However, NRG-1-ICD function in VSMCs remains unknown. Here, we characterize the function of NRG-1-ICD and underlying mechanisms in VSMCs. Immunofluorescence staining, Western blotting, and quantitative real-time polymerase chain reaction showed that NRG-1 was expressed in rat, mouse, and human VSMCs and was upregulated and cleaved in response to transforming growth factor-β1. In the cytoplasm of HASMCs (human aortic smooth muscle cells), the NRG-1-ICD participated in filamentous actin formation by interacting with α-SMA (smooth muscle α-actin). In the nucleus, the Nrg-1-ICD induced circular ACTA2 (alpha-actin-2; circACTA2) formation by recruitment of the zinc-finger transcription factor IKZF1 (IKAROS family zinc finger 1) to the first intron of α-SMA gene. We further confirmed that circACTA2, acting as a sponge binding microRNA (miR)-548f-5p, interacted with miR-548f-5p targeting 3' untranslated region of α-SMA mRNA, which in turn relieves miR-548f-5p repression of the α-SMA expression and thus upregulates α-SMA expression, thereby facilitating stress fiber formation and cell contraction in HASMCs. Accordingly, in vivo studies demonstrated that the localization of the interaction of circACTA2 with miR-548f-5p is significantly decreased in human intimal hyperplastic arteries compared with normal arteries, implicating that dysregulation of circACTA2 and miR-548f-5p expression is involved in intimal hyperplasia. These results suggest that circACTA2 mediates NRG-1-ICD regulation of α-SMA expression in HASMCs via the NRG-1-ICD/circACTA2/miR-548f-5p axis. Our data provide a molecular

  6. Acta Structilia: Editorial Policies

    African Journals Online (AJOL)

    Dr K Agyekum (Department of Building Technology, Kwame Nkrumah ... Mr A Kerin (President, Slovenian Project Management Association, Slovenia) ... Subscription information and subscription forms can be obtain form the editorial office:.

  7. Archives: Acta Theologica

    African Journals Online (AJOL)

    , No 2 (2017). 2016. Vol 36, No 1 (2016) · 2016: SUPPLEMENTUM 23. 2015. Vol 35, No 2 (2015) · Vol 35, No 1 (2015) · 2015: SUPPLEMENTUM 21 · 2015: SUPPLEMENTUM 22. 2014. Vol 34, No 2 (2014) · Vol 34, No 1 ...

  8. Acta Structilia: Submissions

    African Journals Online (AJOL)

    After that use a) etc. 11. Source references in the text must be in the Harvard style of referencing (Author, date: pages). i. e. (Schleien, 2006: 20-40). 12. Foot- and endnotes are likewise done in the Harvard style of referencing. 13. The references list (Harvard style of referencing) should contain all the relevant information, ...

  9. Acta Theologica - 2014

    African Journals Online (AJOL)

    Freedom in the sense of the Heidelberg Catechism – an orientation in the ... Learning theological ethics through the Heidelberg Catechism · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT ... What profit is the reign of Christ to us?

  10. Acta Theologica - Supplementum 17

    African Journals Online (AJOL)

    Pavel Aleksadrovič Florenskij's method of discerning spiritual truth · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. C Camilleri, 228-246. http://dx.doi.org/10.4314/actat.v32i2S.13 ...

  11. Advances in membrane protein crystallography: in situ and in meso data collection

    International Nuclear Information System (INIS)

    Weyand, Simone; Tate, Christopher G.

    2015-01-01

    Membrane protein structural biology has made tremendous advances over the last decade but there are still many challenges associated with crystallization, data collection and structure determination. Two independent groups, Axford et al. [(2015), Acta Cryst. D71, 1228–1237] and Huang et al. [(2015), Acta Cryst. D71, 1238–1256], have published methods that make a major contribution to addressing these challenges

  12. Advances in membrane protein crystallography: in situ and in meso data collection

    Energy Technology Data Exchange (ETDEWEB)

    Weyand, Simone, E-mail: sw644@cam.ac.uk [Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA (United Kingdom); Tate, Christopher G., E-mail: sw644@cam.ac.uk [MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Francis Crick Avenue, Cambridge CB2 0QH (United Kingdom)

    2015-05-23

    Membrane protein structural biology has made tremendous advances over the last decade but there are still many challenges associated with crystallization, data collection and structure determination. Two independent groups, Axford et al. [(2015), Acta Cryst. D71, 1228–1237] and Huang et al. [(2015), Acta Cryst. D71, 1238–1256], have published methods that make a major contribution to addressing these challenges.

  13. A facile synthesis of 1,2,3-triazolyl indole hybrids via SbCl3 ...

    Indian Academy of Sciences (India)

    Ponnuswamy A and Jagatheesan R 2011 Acta Cryst. E67 o2707. 27. Fun H K, Hemamalini M, Shanmugavelan P,. Ponnuswamy A and Jagatheesan R 2011 Acta Cryst. E67 o2776. 28. Sundberg R J 1996 The Chemistry of Indoles, New York: Academic Press 113. 29. (a) Saxton J E 1997 Nat. Prod. Rep. 14 559; (b) Toyota.

  14. Safety evaluation report related to steam generator repair at H.B. Robinson Steam Electric Plant, Unit No. 2. Docket No. 50-261

    International Nuclear Information System (INIS)

    1983-11-01

    A Safety Evaluation Report was prepared for the H.B. Robinson Steam Electric Plant Unit No. 2 by the Office of Nuclear Reactor Regulation. This report considers the safety aspects of the proposed steam generator repair at H.B. Robinson Steam Electric Plant Unit No. 2. The report focuses on the occupational radiation exposure associated with the proposed repair program. It concludes that there is reasonable assurance that the health and safety on the public will not be endangered by the conduct of the proposed action, such activities will be conducted in compliance with the Commission's regulations, and the issuance of this amendment will not be inimical to the common defense and security or the health and safety of the public

  15. Stability and Convergence Analysis of Second-Order Schemes for a Diffuse Interface Model with Peng-Robinson Equation of State

    KAUST Repository

    Peng, Qiujin; Qiao, Zhonghua; Sun, Shuyu

    2017-01-01

    In this paper, we present two second-order numerical schemes to solve the fourth order parabolic equation derived from a diffuse interface model with Peng-Robinson Equation of state (EOS) for pure substance. The mass conservation, energy decay property, unique solvability and L-infinity convergence of these two schemes are proved. Numerical results demonstrate the good approximation of the fourth order equation and confirm reliability of these two schemes.

  16. Draft environmental statement related to steam generator repair at H.B. Robinson Steam Electric Plant Unit No. 2, (Docket No. 50-261)

    International Nuclear Information System (INIS)

    1983-09-01

    The staff has considered the environmental impacts and economic costs of the proposed steam generator repair at the H.B. Robinson Steam Electric Plant Unit No. 2 along with reasonable alternatives to the proposed action. The staff has concluded that the proposed repair will not significantly affect the quality of the human environment and that there are no preferable alternatives to the proposed action. Furthermore, any impacts from the repair program are outweighted by its benefits

  17. Final environmental statement related to the operation of H.B. Robinson Nuclear Steam-Electric Plant, Unit 2: (Docket No. 50-261)

    International Nuclear Information System (INIS)

    1975-04-01

    The proposed action is the continuation of Facility Operating License DPR-23 to Carolina Power and Light Company for H.B. Robinson Unit 2. Unit 2, located adjacent to Lake Robinson in Darlington County, near Hartsville, South Carolina, employs a pressurized water reactor to produce up to 2200 megawatts thermal (MWt). A steam turbine-generator uses this heat to provide 700 megawatts electric (MWe) of net electrical power capacity. A design power level of 2300 MWt (730 MWe) has been requested and is considered in the assessments contained in this statement. The exhaust steam is cooled by a flow of water obtained from the discharged to a 2250-acre cooling lake, Lake Robinson. Land areas disturbed during construction of the plant, but not used, have been seeded to native grasses, trees, and shrubs. Construction of a cooling water discharge canal extension resulted in alteration of about 100 acres of wildlife habitat. Subsequently, the canal banks were seeded with pines and legumes. Some erosion has taken place in the pine-seeded areas. Some small fish are killed by impingement on the water intake screens. Organisms passing through the screens very likely do not survive their passage through the circulating water system. Operation of the plant will cause an increase in the temperature of Black Creek below Lake Robinson. A small impact exists due to production and, after processing, disposal or release of sanitary and chemical wastes. Unit 2 may discharge up to 500 pounds/day of chemicals (primarily sulfates). Under conditions of low flow into and out of the lake, this increases the sulfate concentration in the lake by less than 1 ppM over the normal 7.7 ppM

  18. Stability and Convergence Analysis of Second-Order Schemes for a Diffuse Interface Model with Peng-Robinson Equation of State

    KAUST Repository

    Peng, Qiujin

    2017-09-18

    In this paper, we present two second-order numerical schemes to solve the fourth order parabolic equation derived from a diffuse interface model with Peng-Robinson Equation of state (EOS) for pure substance. The mass conservation, energy decay property, unique solvability and L-infinity convergence of these two schemes are proved. Numerical results demonstrate the good approximation of the fourth order equation and confirm reliability of these two schemes.

  19. Cytotaxonomy of two species of genus Chrysolaena H. Robinson, 1988 (Vernonieae, Asteraceae) from Northeast Paraguay

    Science.gov (United States)

    Pico, Gisela M. Via Do; Dematteis, Massimiliano

    2014-01-01

    Abstract Chromosome counts and karyotypes of two species of Chrysolaena H. Robinson 1988 are presented in this paper. Mitotic analysis revealed that both taxa have x=10, a basic chromosome number considered characteristic of the genus. The chromosome number and the karyotype of Chrysolaena cristobaliana are reported for the first time, as well as a new cytotype and the karyotype of Chrysolaena sceptrum. Chrysolaena cristobaliana showed heptaploid cytotype with 2n=7x=70 and a karyotype composed of 46 m + 24 sm chromosomes. On the other hand, Chrysolaena sceptrum presented tetraploid cytotype with 2n=4x=40 and a karyotype with 30 m + 10 sm chromosomes. Accessory chromosomes were observed in cells of both species. The chromosome analysis showed that these species differ in the chromosome number and the total chromosome length, although they showed similar chromosome morphology and asymmetry indexes. The results support the use of chromosome data in taxonomic treatments of the American members of the tribe Vernonieae. PMID:25147624

  20. Thermodynamically consistent simulation of nonisothermal diffuse-interface two-phase flow with Peng-Robinson equation of state

    KAUST Repository

    Kou, Jisheng; Sun, Shuyu

    2017-01-01

    In this paper, we consider a diffuse-interface gas-liquid two-phase flow model with inhomogeneous temperatures, in which we employ the Peng-Robinson equation of state and the temperature-dependent influence parameter instead of the van der Waals equation of state and the constant influence parameter used in the existing models. As a result, our model can characterize accurately the physical behaviors of numerous realistic gas-liquid fluids, especially hydrocarbons. Furthermore, we prove a relation associating the pressure gradient with the gradients of temperature and chemical potential, and thereby derive a new formulation of the momentum balance equation, which shows that gradients of the chemical potential and temperature become the primary driving force of the fluid motion. It is rigorously proved that the new formulations of the model obey the first and second laws of thermodynamics. To design efficient numerical methods, we prove that Helmholtz free energy density is a concave function with respect to the temperature under certain physical conditions. Based on the proposed modeling formulations and the convex-concave splitting of Helmholtz free energy density, we propose a novel thermodynamically stable numerical scheme. We rigorously prove that the proposed method satisfies the first and second laws of thermodynamics. Finally, numerical tests are carried out to verify the effectiveness of the proposed simulation method.

  1. Thermodynamically consistent simulation of nonisothermal diffuse-interface two-phase flow with Peng-Robinson equation of state

    KAUST Repository

    Kou, Jisheng

    2017-12-06

    In this paper, we consider a diffuse-interface gas-liquid two-phase flow model with inhomogeneous temperatures, in which we employ the Peng-Robinson equation of state and the temperature-dependent influence parameter instead of the van der Waals equation of state and the constant influence parameter used in the existing models. As a result, our model can characterize accurately the physical behaviors of numerous realistic gas-liquid fluids, especially hydrocarbons. Furthermore, we prove a relation associating the pressure gradient with the gradients of temperature and chemical potential, and thereby derive a new formulation of the momentum balance equation, which shows that gradients of the chemical potential and temperature become the primary driving force of the fluid motion. It is rigorously proved that the new formulations of the model obey the first and second laws of thermodynamics. To design efficient numerical methods, we prove that Helmholtz free energy density is a concave function with respect to the temperature under certain physical conditions. Based on the proposed modeling formulations and the convex-concave splitting of Helmholtz free energy density, we propose a novel thermodynamically stable numerical scheme. We rigorously prove that the proposed method satisfies the first and second laws of thermodynamics. Finally, numerical tests are carried out to verify the effectiveness of the proposed simulation method.

  2. Acta Cirúrgica Brasileira. Visibilidade e acessibilidade da produção científica na área da cirurgia experimental

    Directory of Open Access Journals (Sweden)

    Población Dinah Aguiar

    2001-01-01

    Full Text Available A visibilidade da ciência divulgada pela Acta Cirúrgica Brasileira é analisada ao longo da trajetória de 15 anos de publicação ininterrupta, durante a qual foi mantida a periodicidade proposta. Com isto obteve os créditos necessários, para ser selecionada por autores nacionais e estrangeiros que publicaram 116 artigos no primeiro qüinqüênio (1986-1990, 170 no segundo qüinqüênio (1991-1995 e 190 no terceiro qüinqüênio (1996-2000 e também para ser inserida na Base LILACS desde 1987. A partir de maio de 1998 foi credenciada, entre os periódicos brasileiros da área da saúde, para ser incorporada ao Projeto SciELO Brasil. Os indicadores da Base SciELO permitem avaliar a posição da ACTA quanto às características formais de publicação revelando a qualidade científica por meio dos relatórios de uso do "site", acesso aos artigos e às revistas citantes. Análises cienciométricas são realizadas para avaliar a visibilidade e acessibilidade da literatura científica publicada na ACTA.

  3. [Bibliometric study of Actas Dermo-sifiliográficas (1984-2003) III. Analysis of bibliographic impact factors].

    Science.gov (United States)

    Miralles, Julia; Ramos, José M; Ballester, Rosa; Belinchón, Isabel; Sevila, Amparo; Moragón, Manuel

    2005-11-01

    To quantify the impact factor of the journal Actas Dermo-Sifiliográficas (AD) from 1986 to 1990 and from 1999 to 2003 and to identify the journal's citation pattern in those years. Citations obtained by AD in the periods from 1985-1990 and 1998-2003 for articles published from 1984 to 1989 and from 1997 to 2002 were collected using Science Citation Index Expanded (SCI). The number of times AD was cited doubled during the second period, increasing from 38 (period from 1985-1990) to 76 (period from 1998-2003). Considering the number of citations, AD's impact factor increased from 0.016 in 1986 to 0.040 in 2003. In both periods, citations corresponding to AD articles were included in a wide range of source journals, mainly dermatological publications abroad. The most referred journals in the second period were the Dutch publication Journal of the European Academy of Dermatology and Venereology (13 citations) and the Journal of the American Academy of Dermatology (12 citations). Unlike the period from 1985 to 1990 when no Spanish journal cited AD, four Spanish publications mentioned AD in the second period: Revista clínica española (6 citations), Archivos de bronconeumología (4 citations), Medicina clínica (3 citations) and the journal Enfermedades infecciosas y microbiología clínica (1 citation). Citations mainly corresponded to articles published by Spanish authors (63.2 % in the 1985-1990 period and 81.6 % in the period from 1998 to 2003). Self-citation increased from 10.5 % (first period) to 31.6 % (second period). The impact factor of AD is low and not comparable to other publications included in the Dermatology and Venereal Diseases field from SCI. Our results confirm the low citation rate of AD by source journals in this repertory. However, the increase of this rate in recent years seems to indicate a higher Spanish presence in SCI due to an increasing number of publications corresponding to Spanish authors in international journals and the inclusion of

  4. A comparison between Peng-Robinson and Soave-Redlich-Kwong cubic equations of state from modification perspective

    Science.gov (United States)

    Ghanbari, Mehdi; Ahmadi, Mahdi; Lashanizadegan, Asghar

    2017-06-01

    The Cubic Equations of State (CEOSs) are the most important tools in PVT calculations due to their simplicity in use and their extrapolative abilities to condition well outside their correlation ranges. Peng-Robinson (PR) and Soave-Redlich-Kwong (SRK) are most successful in the CEOSs which have repeatedly been modified in order to improve their accuracy in wider ranges of temperature and pressure. Unfortunately, most of modifications carried out on these EOSs have no adequate justification for selecting either of these as the basic starting point for the modifications. In this paper, PR and SRK EOSs were critically compared with each other using some new features of their subcritical and supercritical results. For this purpose, the CEOSs were assessed using comprehensive tests of the PVT calculations in the vapor-liquid equilibrium (for pure hydrocarbons over a wide range of acentric factor values: Methane, Ethane Propane, Butane, Heptane and Nonane) and Joule-Thomson Inversion Curves' (JTICs) predictions (for compounds which have reliable JTICs data: Methane, Ethane, Ethylene, Nitrogen, Oxygen, Argon and Carbon dioxide) in subcritical and supercritical regions, respectively. The results indicated that the PR EOS by using any of realistic α-function forms will never be able to accurately predict the JTICs in full span. On the other hand, the subcritical results revealed that the great success of the PR CEOS in predicting liquid phase density is only due to its function in shifting the results of the SRK CEOS to the lower values with the same curve trend. In addition, the Patel and Teja's (PT) EOS, has been reevaluated and the results showed that most of the defects of PR EOS still remain. This article suggests that in order to develop CEOSs, the original SRK EOS is a better candidate than original and alternative forms of PR EOS.

  5. Implementation of ergonomics in the management of parking increasing the quality of living parking park in mall Robinson Denpasar city

    Science.gov (United States)

    Sutapa, I. K.; Sudiarsa, I. M.

    2018-01-01

    The problems that often arise in the area of Denpasar City mostly caused by parking problems at the centers of activities such as shopping centers. The problems that occur not only because of the large number of vehicles that parked but also the result of the condition of parking officers who have not received attention, there is no concern about the physical condition of parking attendants because doing night guard duty. To improve the quality of parking officer, ergonomic parking lot is improved through the application of appropriate technology with systemic, holistic, interdisciplinary and participatory approach. The general objective of the research is to know the implementation of ergonomics in parking management on the improvement of the quality of parking officer in Robinson shopping center. The indicator of the quality of the parking officer work is the decrease of musculoskeletal complaints, fatigue, workload, boredom and increasing work motivation. The study was conducted using the same subject design, involving 10 subjects as a simple random sample. Intervention is done by arrangement of ergonomic basement motorcycle parking. Measurements done before and after repair. Washing out (WO) for 14 days. The data obtained were analyzed descriptively, tested normality (shapirowilk) and homogeneity (Levene Test). For normal and homogeneous distribution data, different test with One Way Anova, different test between Period with Post Hoc. Normally distributed and non-homogeneous data, different test with Friedman Test, different test between periods using Wilcoxon test. Data were analyzed with significance level of 5%. The results showed that the implementation of ergonomic in the management of parking area of the court decreased musculoskeletal complaints by 15.10% (p management of the parking lot improves the quality of the parking officer work from: (1) decrease of musculoskeletal complaints, (2) decrease of melting rate, (3) decrease of parking workload

  6. BOOK REVIEW: Astronomie von Olbers bis Schwarzschild. Nationale Entwicklungen und internationale Beziehungen im 19. Jahrhundert (Acta Historica Astronomiae Vol. 16)

    Science.gov (United States)

    Sterken, C.; Dick, W. R.; Hamel, J.

    2002-12-01

    The 14th volume of the Acta Historica Astronomiae is the Proceedings of a Colloquium International Relationships in Astronomy (in German) organised by the History of Astronomy Section of the Astronomische Gesellschaft held on September 18 in Lilienthal, Germany. The book contains 13 articles on astronomical topics covering the 19th and 20th centuries. The first paper is by Guenther Oestmann and deals with contemporary assessments of Johann Hieronymus Schroeter's (1745-1816) astronomical works and with later judgements of the scientific importance and significance of his observations as seen by astronomers and historians. This report is complemented by a second article on Schroeter's 25-ft reflector in Lilienthal near Bremen. To this end, author Felix Luehning has constructed a scale model of the telescope, and shows how the building of a model brings a deeper understanding of function and handling of this instrument. This brings us to a third paper on telescope building in Lilienthal: Hans-Joachim Leue describes the cooperation of Johann Hieronymus Schroeter and Johann Gottlieb Schrader in developing a white reflecting metal alloy for use as telescope mirror. The fourth article, by Klaus Schillinger, describes on the basis of archival documents the aquisition history of the Herschel telescopes, including telescope quality check, repair and building. Memorial sites referring to Wilhelm Olbers, Johann Hieronymus Schroeter, Friedrich Wilhelm Bessel and Carl Friedrich Gauss are described by Arno Langkavel in two walks outlined in the very last paper of this book. Peter Brosche, in the fifth paper, discusses the rediscovery of Ceres in December1801, a discovery that was the result of the combined efforts of a theoretician (Gauss) and an observer (Zach). Juergen Hamel's paper is based on previously unused archival sources and discusses the outstanding role played by H. C. Schumacher (1780-1850, editor of the Astronomische Nachrichten) in the communication between

  7. Christo Deltshev & Pavel Stoev (eds) (2006): European Arachnology 2005, Acta zoologica bulgaria, Suppl. No. 1; Proceedings of the 22nd European Colloquium of Arachnology, Blagoevgrad, Bulgaria, 1-6 August 2005

    OpenAIRE

    Kunz, Dirk

    2006-01-01

    book review: Christo Deltshev & Pavel Stoev (eds) (2006): European Arachnology 2005, Acta zoologica bulgaria, Suppl. No. 1; Proceedings of the 22nd European Colloquium of Arachnology, Blagoevgrad, Bulgaria, 1-6 August 2005

  8. Pottseppade Portugal / Riina Robinson

    Index Scriptorium Estoniae

    Robinson, Riina

    2006-01-01

    Portugali ühest populaarsemast käsitööliigist - keraamikast ja selle huvitavatest variantidest ning regiooniti iseloomulikest erinevustest - maalingute värvidest, mustritest, tehnoloogiast nii nõudel kui ka keraamilistel plaatidel

  9. For a better visibility: changes in notes for contributors Acta Scientiarum. Technology - doi: 10.4025/actascitechnol.v34i1.15289

    Directory of Open Access Journals (Sweden)

    Nilson Evelázio de Souza

    2011-11-01

    Full Text Available O Fator de Impacto de 2009 da Acta Scientiarum. Technology pelo JCR foi 0,276 e o de 2010 é 0,150. O Objetivo da revista é adquirir maior visibilidade tanto Nacional como Internacional. Nesse contexto, o Conselho Editorial da revista Acta Scientiarum. Technology modificou as normas de submissão a partir de setembro de 2011 (Os artigos submetidos deverão ser em inglês. Os autores devem providenciar uma versão com qualidade. A revista recomenda que oitenta porcento (80% das referências sejam de artigos listados na base ISI Web of Knowledge ou SCOPUS com menos de 10 anos. Recomenda-se dar preferência as citações de artigos internacionais. Não serão aceitos nas referências citações de dissertações, teses, monografias, anais, resumos, resumos expandidos, jornais, magazines e boletins técnicos. Recomenda-se evitar documentos eletrônicos.

  10. A profile of the impact of Acta Botanica Brasilica: reflections on how to improve visibility and recognition of a scientific journal Um perfil do impacto da Acta Botanica Brasilica: reflexões acerca de como aumentar a visibilidade e o reconhecimento de um periódico cient��fico

    Directory of Open Access Journals (Sweden)

    Fabio Rubio Scarano

    2009-06-01

    Full Text Available We have estimated the ISI-impact factor of Acta Botanica Brasilica for the past six years, calculated the journal's h-index, calculated the journal's self-citation, examined country and institutions of origin of the papers that cite Acta papers, and examined scope and profile of the most-cited papers published by the journal. Results demonstrated a steep rise in impact factor and citation frequency in 2008, which is most encouraging, but also revealed that the journal is below the level of maturity expected of a 20-year old journal. Visibility of the journal is mostly national although, surprisingly, journal's self-citation of 12% is fairly low. We use Acta as an example to discuss possible strategies to enhance the international visibility of botanical journals that are newcomers to ISI.Este artigo estima o fator de impacto (ISI-Web of Science do periódico Acta Botanica Brasilica para os últimos seis anos, calcula o índice-h do periódico, calcula a sua auto-citação, examina os países e instituições de origem dos artigos que citam artigos da Acta, e examina o escopo e o perfil dos artigos mais citados ao longo da história do periódico. Os resultados demonstraram um aumento substancial no fator de impacto estimado e na freqüência de citação em 2008, o que é muito encorajador, mas também revelaram que o periódico está abaixo do grau de maturidade esperado para um periódico com 20 anos de existência. A visibilidade do periódico é predominantemente nacional embora, surpreendentemente, a auto-citação de 12% seja consideravelmente baixa. A revista é utilizada como exemplo para discutir possíveis estratégias para aumentar a visibilidade internacional de periódicos em botânica recém-indexados no ISI.

  11. [Journal AMHA - Acta medico-historica Adriatica: 14 years of patient work on the scientific valorisation of the history of medicine].

    Science.gov (United States)

    Eterović, Igor

    2017-12-01

    In this paper the first 14 years of publication of scientific journal AMHA - Acta medico‑historica Adriatica (2002-2016) are presented and shortly analysed. This journal has undoubtedly become and remained the central activity of the Croatian Scientific Society for the History of Health Culture, which has rapidly become a globally esteemed journal of history of medicine. The beginning and the context of publishing the journal with the reference to scientific meeting "Rijeka and Its Citizens in Medical History" is presented, as well as the journal's profiling into distinguished international journal and its fast development in later years. The analysis shows the growth of journal's visibility through indexation in different international journal databases, the number and ratio of scientific articles and the variety of published material. Finally, a review of the potential future directions of development and the significance of this journal within the national, regional and international context is given.

  12. Cross-National Data on Victims of Bullying: How Does PISA Measure up with Other Surveys? An Update and Extension of the Study by Smith, Robinson, and Marchi (2016)

    Science.gov (United States)

    Smith, Peter K.; Lopez-Castro, Leticia

    2017-01-01

    Until recently, there were four sources of large-scale self-report survey data on victim rates, cross-nationally: EU Kids Online, Global School Health Survey, Trends in International Mathematics and Science Study, and Health Behaviour of School-aged Children. Smith, Robinson, and Marchi (2016) examined the internal validity and external validity…

  13. Invasion establishment and habitat suitability of Chromolaena odorata (L. King and Robinson over time and space in the western Himalayan forests of India

    Directory of Open Access Journals (Sweden)

    Gautam Mandal

    2014-12-01

    Full Text Available Habitat suitability assessment of the invasive species Chromolaena odorata (L. King and Robinson from Himalayan forests reveals some interesting findings and conclusions. At different study sites, 29 of 72 species were exotic and invasive and comprised 21 genera and eight families. Indigenous species accounted for 59% of the total species and comprised 26 genera and 11 families. Perennials outnumbered the annuals in all study sites. Chromolaena odorata and Lantana camara L. were the only invasive species that were common to all sites with high importance value index values. The present work reveals that sites with high biotic pressure, maximum temperature variation, open forest canopy, and free from herbivory are the most suitable habitat for the growth of C. odorata. An elevated level of phosphorus, potassium, magnesium, soil organic matter, and nitrogen and acidic soil in all invaded sites are possible reasons for further invasion of C. odorata.

  14. Iglesia y poder público. Actas del VII Simposio de Historia de la Iglesia en España y América (Reseña)

    OpenAIRE

    Tineo, P. (Primitivo)

    1998-01-01

    Reseña del libro de Paulino CASTAÑEDA-Manuel J. COCINA Y ABELLA (coords.), Iglesia y poder público. Actas del VII Simposio de Historia de la Iglesia en España y América, Academia de Historia Eclesiástica, Obra social y cultural Cajasur, Córdoba 1997, 308 pp.

  15. Book Reviews | Laubscher | Acta Theologica

    African Journals Online (AJOL)

    Title: Worship for the whole people of God. Vital worship for the 21st century. Author: Duck, R. (Louisville, KY: Westminster John Knox Press, 2013), pp. xxii + 334. ISBN: 978‑0‑664‑23427‑0. Title: Informed by Science, involved by Christ, How science can update, enrich and empower the Christian faith. Author: K. Nürnberger.

  16. Acta Theologica Supplementum 14 2011

    African Journals Online (AJOL)

    IT Benson

    greater attention to principles of modus vivendi rather than “convergence” in which .... are divided now from recognition that human life is necessarily lived with “faith” ... Perhaps one of the implicit forms or modern “beliefs” is hidden in the idea.

  17. Investigation of the Impact of ENDF/B-VI Cross Sections on the H.B. Robinson-2 Pressure-Vessel Flux Prediction

    International Nuclear Information System (INIS)

    Remec, I

    1999-01-01

    This report discusses the impact of the change from the SAILOR cross-section library, based on the ENDF/B-IV data, to the BUGLE-96 cross-section library, based on the ENDF/B-VI data, on the neutron flux prediction in the H. B. Robinson-2 pressure vessel, in the surveillance capsule, and in the cavity. The fast flux (E > 1 MeV) from the transport calculations with the BUGLE-96 library is approximately6% higher in the surveillance capsule and at the PV inner wall, and approximately25% higher in the reactor cavity than the flux from the transport calculations with the SAILOR library. These changes result from the combined effect of the changes in the cross sections, which cause significant increases in the calculated fluxes, and much smaller decreases in the fast fluxes due to the changes in the fission spectra. The increase in the calculated fast flux due to the changes in the cross sections only is approximately9% in the capsule and at the pressure vessel (PV) wall, and approximately30% in the cavity. The changes in the fission spectra lead to decreases in the order of approximately3-4% in calculated fast fluxes

  18. Atividade antiinflamatória do extrato etanólico de Conocliniopsis prasiifolia R.M. King & H. Robinson na resposta celular de neutrófilos

    Directory of Open Access Journals (Sweden)

    Maria das Graças da Silva

    Full Text Available Conocliniopsis prasiifolia (DC R.M. King & H. Robinson é uma espécie utilizada na medicina popular como antiinflamatória e analgésica, pertencente à família Asteraceae e conhecida como "mentrasto-roxo". Estudos prévios com o extrato etanólico das folhas de C. prasiifolia (EECp demonstraram uma baixa toxicidade por via oral e intraperitoneal, bem como efeito analgésico e antiinflamatório em modelos animais. O presente estudo objetivou avaliar o efeito de EECp frente à degranulação de neutrófilos, e dessa forma melhor caracterizar o efeito antiinflamatório dessa espécie vegetal. Para tanto, foram utilizados neutrófilos peritoneais de ratos e técnicas espectrofotométricas. Os resultados demonstraram que EECp, nas concentrações de 25 e 50 µg/mL, foi capaz de inibir de forma significativa (p<0,05 a degranulação de neutrófilos induzida por fMLP. Portanto, o EECp impede a liberação de grânulos dos neutrófilos contendo enzimas degradativas, demonstrando atividade antiinflamatória.

  19. Favouring more rigour when investigating human eating behaviour is like supporting motherhood and apple pie: A response to Robinson, Bevelander, Field, and Jones (2018).

    Science.gov (United States)

    Hetherington, Marion M; Rolls, Barbara J

    2018-05-11

    In a 1987 paper, addressing questions about factors that influence the initiation, maintenance, and termination of food intake, we wrote, "development of systematic procedures to measure eating behaviour is essential if descriptive and inferential statistics are to be applied to answering such questions, giving them power and replicability" (Hetherington & Rolls, 1987 page 77). Therefore, as longstanding advocates of rigorous procedures in laboratory-based investigations of food intake, we welcome Robinson et al.'s (2018) clear recommendations for laboratory studies. However, this is akin to voting for "motherhood and apple pie", and few would argue against deployment of improved procedures for these studies. What then can we contribute to the debate in order to refine the recommendations made or add to them? Our most important message for researchers is that the central hypothesis or main research question will determine the most appropriate methods for any study. If a laboratory-based study is planned, then there are basic methodological questions that must be answered before proceeding to a final protocol. While such guidelines are needed to ensure basic methodological rigour, these should not be so prescriptive as to inhibit creativity. Here we provide several thoughts on how to advance studies of ingestive behaviour, including the need to apply appropriate controls, encouragement to move beyond convenience samples, and to remember the value of exploratory, observational, and naturalistic studies to complement laboratory-based studies. Copyright © 2018. Published by Elsevier Ltd.

  20. Kolm Eesti Robinsoni: Daniel Defoe romaan eesti tõlkes / Three Estonian Robinsons: Daniel Defoe’s Novel in Estonian Translation

    Directory of Open Access Journals (Sweden)

    Ene-Reet Soovik

    2012-06-01

    Full Text Available The article discusses three Estonian translations of Daniel Defoe’s Robinson Crusoe into Estonian with the focus on the completeness of the translated texts and the characterisation given to these in paratextual information. While there are several translations and versions of the tex t available in E stonian that have either used a mediating language or do not proceed directly from Defoe’s novel, three editions explicitly list Defoe’s English-language Robinson Crusoe as their source text. These are Rudolf Sirge’s translation from 1950 and two editions translated by Valter Rummel that appeared in 1984 (reprinted in 2001 and 2007, respectively. The article sets out to discover the main differences between the three editions and the possible reasons that may have triggered their publication in Estonia at those particular times. In order to approach the issues, a general framework derived from descriptive translation studies is employed with an emphasis on Gideon Toury’s chrestomatic treatment of translation norms. Thus an attempt is made to detect the preliminary translational norms regarding translation policy, particularly the choice of texts to be translated, as well as the matricial norms that concern the fullness of the translated text and are part of operational norms manifested in the translator’s decisions which, in two of the cases at hand, may also have been decisions made by the editor or the censor. Rudolf Sirge’s translation appeared at a time when Estonia had fairly recently been incorporated into the Soviet Union and there was a lack of children’s literature ideologically appreciated by the regime. This may account for the packaging of the book as a work with a strong didactic bent, while its primary audience was taken to be children and young adults for whom the protagonist served as an example of a hard-working and tenacious hero to be emulated by young Soviets. The target text has been considerably shortened as

  1. Anatomia das raízes de Bacopa salzmanii (Benth. Wettst. Ex Edwall e Bacopa Monnierioides (Cham. Robinson (Scrophulariaceae em ambientes aquático e terrestre

    Directory of Open Access Journals (Sweden)

    Bona Cleusa

    2003-01-01

    Full Text Available O presente trabalho enfoca a anatomia das raízes de Bacopa salzmanii (Benth. Wettst. Ex Edwall e B. monnierioides (Cham. Robinson e suas adaptações aos ambientes aquático e terrestre. Foram analisadas raízes adventícias das duas espécies, coletadas no Município de Bonito e no Pantanal do Mato Grosso do Sul. As análises foram feitas do ápice à base da raiz, enfatizando a origem e desenvolvimento dos tecidos. O meristema apical apresenta a mesma estrutura nas duas espécies e não sofre alterações marcantes com a mudança do ambiente. Todos os tecidos se originam de três camadas distintas, na região do promeristema. A endoderme jovem é meristemática e dá origem ao córtex. O aerênquima é abundante e os septos podem conter espessamento em fi. A exoderme é unisseriada e composta por células curtas e longas. A coifa das duas espécies é pouco desenvolvida e apresenta estrutura semelhante nos dois ambientes.

  2. Unconditionally stable methods for simulating multi-component two-phase interface models with Peng-Robinson equation of state and various boundary conditions

    KAUST Repository

    Kou, Jisheng

    2015-03-01

    In this paper, we consider multi-component dynamic two-phase interface models, which are formulated by the Cahn-Hilliard system with Peng-Robinson equation of state and various boundary conditions. These models can be derived from the minimum problems of Helmholtz free energy or grand potential in the realistic thermodynamic systems. The resulted Cahn-Hilliard systems with various boundary conditions are fully coupled and strongly nonlinear. A linear transformation is introduced to decouple the relations between different components, and as a result, the models are simplified. From this, we further propose a semi-implicit unconditionally stable time discretization scheme, which allows us to solve the Cahn-Hilliard system by a decoupled way, and thus, our method can significantly reduce the computational cost and memory requirements. The mixed finite element methods are employed for the spatial discretization, and the approximate errors are also analyzed for both space and time. Numerical examples are tested to demonstrate the efficiency of our proposed methods. © 2015 Elsevier B.V.

  3. Tolerance mechanisms in mercury-exposed Chromolaena odorata (l.f. R.M. King et H. Robinson, a potential phytoremediator

    Directory of Open Access Journals (Sweden)

    H J P Alcantara

    2013-10-01

    Full Text Available Chromolaena odorata (L.f. R.M. King et H. Robinson plants were grown in Hoagland’s solutions with 0.00 ppm and 1.00 ppm Hg(NO32. The calcium, magnesium, iron, and sulfur levels in the leaves were found to be not significantly affected by presence of the uptaken Hg2+. The chlorophyll a, chlorophyll b, and total chlorophyll contents of its leaves also remained within normal levels, which may indicate that the photosynthetic machinery of the Hg-exposed C. odorata was unaffected by the presence of Hg2+. The results of the ICP-AES analyses of the Hg2+ contents established the presence of Hg2+ in all the subcellular components obtained from the leaves of the Hg-treated C. odorata plants, and that the ultimate localization of Hg2+ is in the vacuoles. The findings revealed no significant differences in the degree of oxidative injury between the cells from the control and Hg-treated plants, as evidenced by the low lipid peroxidation levels obtained with the TBARS assay. The SH-containing biomolecules that were initially detected through DTNB assay manifested a predominant peak in the RP-HPLC chromatographs of both the control and Hg-treated plants, with their retention times falling within the ranges of GSH, MT, and cysteine standards. However, the concentrations of the GSH- and/or MT-like, Cys-containing biomolecules detected in the leaves of Hg-treated C. odorata plants were ten times higher than those of the control.The findings of this study suggest that the enhanced antioxidative capacity, the production of Hg-binding biomolecules, and the localization of Hg2+ ions ultimately in the vacuoles of the leaves are the mechanisms which bring about Hg2+ tolerance and homeostasis in C. odorata plant. These results indicate that C. odorata is a potentially effective phytoremediator for Hg2+.

  4. Tolerance mechanisms in mercury-exposed Chromolaena odorata (l.f. R.M. King et H. Robinson, a potential phytoremediator

    Directory of Open Access Journals (Sweden)

    H.J.P. Alcantara

    2013-10-01

    Full Text Available Chromolaena odorata (L.f. R.M. King et H. Robinson plants were grown in Hoagland’s solutions with 0.00 ppm and 1.00 ppm Hg(NO32. The calcium, magnesium, iron, and sulfur levels in the leaves were found to be not significantly affected by presence of the uptaken Hg2+. The chlorophyll a, chlorophyll b, and total chlorophyll contents of its leaves also remained within normal levels, which may indicate that the photosynthetic machinery of the Hg-exposed C. odorata was unaffected by the presence of Hg2+. The results of the ICP-AES analyses of the Hg2+ contents established the presence of Hg2+ in all the subcellular components obtained from the leaves of the Hg-treated C. odorata plants, and that the ultimate localization of Hg2+ is in the vacuoles. The findings revealed no significant differences in the degree of oxidative injury between the cells from the control and Hg-treated plants, as evidenced by the low lipid peroxidation levels obtained with the TBARS assay. The SH-containing biomolecules that were initially detected through DTNB assay manifested a predominant peak in the RP-HPLC chromatographs of both the control and Hg-treated plants, with their retention times falling within the ranges of GSH, MT, and cysteine standards. However, the concentrations of the GSH- and/or MT-like, Cys-containing biomolecules detected in the leaves of Hg-treated C. odorata plants were ten times higher than those of the control. The findings of this study suggest that the enhanced antioxidative capacity, the production of Hg-binding biomolecules, and the localization of Hg2+ ions ultimately in the vacuoles of the leaves are the mechanisms which bring about Hg2+ tolerance and homeostasis in C. odorata plant. These results indicate that C. odorata is a potentially effective phytoremediator for Hg2+.

  5. Presencia musical en la Catedral de La Seu d'Urgell en la primera mitad del siglo XVIII a través de sus actas capitulares

    Directory of Open Access Journals (Sweden)

    Roig i Capdevila, Jordi

    2003-12-01

    Brudieu. Pero, en cambio, apenas se conocen datos sobre la vida musical en esta ciudad episcopal durante los siglos XVIII al XX Empalmando con el final temporal abarcado por el trabajo de Pedrell-Anglés, el presente trabajo inicia el vaciado sistemático de la información alusiva a la música contenida en la documentación catedralicia. Aunque se tiene la intención de continuar, en esta ocasión, solamente se publican las actas capitulares correspondientes al período 1700-1750, lo que nos permite obtener una visión general de las actividades y repercusión de una de las principales capillas de música de ámbito catalán, y uno de los centros de ámbito hispánico menos estudiados por la Musicología hasta el momento.

  6. Combined MRI and ³¹P-MRS investigations of the ACTA1(H40Y mouse model of nemaline myopathy show impaired muscle function and altered energy metabolism.

    Directory of Open Access Journals (Sweden)

    Charlotte Gineste

    Full Text Available Nemaline myopathy (NM is the most common disease entity among non-dystrophic skeletal muscle congenital diseases. Mutations in the skeletal muscle α-actin gene (ACTA1 account for ∼25% of all NM cases and are the most frequent cause of severe forms of NM. So far, the mechanisms underlying muscle weakness in NM patients remain unclear. Additionally, recent Magnetic Resonance Imaging (MRI studies reported a progressive fatty infiltration of skeletal muscle with a specific muscle involvement in patients with ACTA1 mutations. We investigated strictly noninvasively the gastrocnemius muscle function of a mouse model carrying a mutation in the ACTA1 gene (H40Y. Skeletal muscle anatomy (hindlimb muscles and fat volumes and energy metabolism were studied using MRI and (31Phosphorus magnetic resonance spectroscopy. Skeletal muscle contractile performance was investigated while applying a force-frequency protocol (from 1-150 Hz and a fatigue protocol (80 stimuli at 40 Hz. H40Y mice showed a reduction of both absolute (-40% and specific (-25% maximal force production as compared to controls. Interestingly, muscle weakness was associated with an improved resistance to fatigue (+40% and an increased energy cost. On the contrary, the force frequency relationship was not modified in H40Y mice and the extent of fatty infiltration was minor and not different from the WT group. We concluded that the H40Y mouse model does not reproduce human MRI findings but shows a severe muscle weakness which might be related to an alteration of intrinsic muscular properties. The increased energy cost in H40Y mice might be related to either an impaired mitochondrial function or an alteration at the cross-bridges level. Overall, we provided a unique set of anatomic, metabolic and functional biomarkers that might be relevant for monitoring the progression of NM disease but also for assessing the efficacy of potential therapeutic interventions at a preclinical level.

  7. Brasil alfabetizado e misión robinson : um estudo comparativo acerca das políticas de alfabetização no Brasil e na Venezuela – 2003-2013

    OpenAIRE

    Jaira Coelho Moraes

    2015-01-01

    Esta pesquisa é um estudo comparado entre dois programas de alfabetização de jovens e adultos que tiveram início no ano de 2003: o PBA – Programa Brasil Alfabetizado, desenvolvido no Brasil, e a Misión Robinson, na Venezuela. A análise destas políticas nos dois países em relação ao momento particular do capitalismo é objetivo principal, e em específico, buscou-se conhecer como se formam os alfabetizadores. O tema aborda a questão do alfabetismo/analfabetismo como um dos problemas sociais que ...

  8. Nuevos lineamientos geopolíticos que el Perú podria aplicar al Ecuador a partir de la firma del Acta Presidencial de Brasilia del 26 de octubre de 1998

    OpenAIRE

    Paredes Hernández, Luis

    1999-01-01

    La presente tesis de Maestría en Seguridad Y Desarrollo se orienta fundamentalmente, a establecer mediante una metodología deductiva los nuevos 7 lineamientos geopolíticos que el Perú podría aplicar al Ecuador a partir de la firma del Acta Presidencial de Brasilia el 26 de octubre de 1998. Para llegar a determinar en forma prospectiva dichos lineamientos se debe acudir, necesariamente, al análisis histórico de las relaciones entre Ecuador y Perú, donde este último, desde ...

  9. Piezoelectric and Electrostrictive Materials for Transducer Applications. Volume 2.

    Science.gov (United States)

    1988-03-01

    Dariington, J. Appi. Phys. 43, 4951 (1972).I 17Z. Ujina and J. Handerek, Acta Physica Polonica A53, 665 (1978). 18Z. Q. Zhuang, M. J. Haun, S. J...Solution System. Part V: Theoretical Calculations." J. Appi. Phys. (submritted). 5 A. M. Glazer, S. A. Mabud, and R. Clarke, Acta Cryst. B34, 1060 (1978...Clarke, Acta Cryst.. B34, 1060 (1978). 12A. Amrin. R. E. Newham, and L. E. Cross, J. Solid State Chemissry 37, 248 (198 1). 13 M. j. Haun, E

  10. Seperation of CsCl from LiCl-CsCl molten salt by cold finger melt cryst allization

    Energy Technology Data Exchange (ETDEWEB)

    Versey, Joshua R. [Dept. of Chemical and Materials Engineering and Nuclear Engineering Program University of Idaho, Idaho (United States); Phongikaroon, Supathorn [Dept. of Mechanical and Nuclear Engineering Virginia Commonwealth University, Richmond (Korea, Republic of); Simpson, Michael F. [Dept. of Metallurgical Engineering University of Utah, Utah (Korea, Republic of)

    2014-06-15

    This study provides a fundamental understanding of a cold finger melt crystallization technique by exploring the heat and mass transfer processes of cold finger separation. A series of experiments were performed using a simplified LiCl-CsCl system by varying initial CsCl concentrations (1, 3, 5, and 7.5 wt%), cold finger cooling rates (7.4, 9.8, 12.3, and 14.9 L/min), and separation times (5, 10, 15, and 30 min). Results showed a potential recycling rate of 0.36 g/min with a purity of 0.33 wt% CsCl in LiCl. A CsCl concentrated drip formation was found to decrease crystal purity especially for smaller crystal formations. Dimensionless heat and mass transfer correlations showed that separation production is primarily influenced by convective transfer controlled by cooling gas flow rate, where correlations are more accurate for slower cooling gas flow rates.

  11. University of Geneva honours LHC project leader Lyn Evans at 450th anniversary ceremony. The honorary degrees, which recognize endeavours in human rights and in fostering dialogue between nations, were also awarded to Mary Robinson, Desmond Tutu, as well as Pascal Lamy .

    CERN Multimedia

    Maximilien Brice

    2009-01-01

    University of Geneva honours LHC project leader Lyn Evans at 450th anniversary ceremony. The honorary degrees, which recognize endeavours in human rights and in fostering dialogue between nations, were also awarded to Mary Robinson, Desmond Tutu, as well as Pascal Lamy .

  12. Semi-empirical correlation for binary interaction parameters of the Peng–Robinson equation of state with the van der Waals mixing rules for the prediction of high-pressure vapor–liquid equilibrium

    Directory of Open Access Journals (Sweden)

    Seif-Eddeen K. Fateen

    2013-03-01

    Full Text Available Peng–Robinson equation of state is widely used with the classical van der Waals mixing rules to predict vapor liquid equilibria for systems containing hydrocarbons and related compounds. This model requires good values of the binary interaction parameter kij. In this work, we developed a semi-empirical correlation for kij partly based on the Huron–Vidal mixing rules. We obtained values for the adjustable parameters of the developed formula for over 60 binary systems and over 10 categories of components. The predictions of the new equation system were slightly better than the constant-kij model in most cases, except for 10 systems whose predictions were considerably improved with the new correlation.

  13. Semi-empirical correlation for binary interaction parameters of the Peng-Robinson equation of state with the van der Waals mixing rules for the prediction of high-pressure vapor-liquid equilibrium.

    Science.gov (United States)

    Fateen, Seif-Eddeen K; Khalil, Menna M; Elnabawy, Ahmed O

    2013-03-01

    Peng-Robinson equation of state is widely used with the classical van der Waals mixing rules to predict vapor liquid equilibria for systems containing hydrocarbons and related compounds. This model requires good values of the binary interaction parameter kij . In this work, we developed a semi-empirical correlation for kij partly based on the Huron-Vidal mixing rules. We obtained values for the adjustable parameters of the developed formula for over 60 binary systems and over 10 categories of components. The predictions of the new equation system were slightly better than the constant-kij model in most cases, except for 10 systems whose predictions were considerably improved with the new correlation.

  14. Excess molar volume, viscosity, and refractive index study for the ternary mixture {2-methyl-2-butanol (1) + tetrahydrofuran (2) + propylamine (3)} at different temperatures. Application of the ERAS-model and Peng-Robinson-Stryjek-Vera equation of state

    International Nuclear Information System (INIS)

    Fattahi, M.; Iloukhani, H.

    2010-01-01

    Densities, viscosities, and refractive indices of the ternary mixture consist of {2-methyl-2-butanol (1) + tetrahydrofuran (THF) (2) + propylamine (3)} at a temperature of 298.15 K and related binary mixtures were measured at temperatures of (288.15, 298.15, and 308.15) K at ambient pressure. Data were used to calculate the excess molar volumes and the deviations of the viscosity and refractive index. The Redlich-Kister and the Cibulka equations were used for correlating binary and ternary properties, respectively. The ERAS-model has been applied for describing the binary and ternary excess molar volumes and also Peng-Robinson-Stryjek-Vera (PRSV) equation of state (EOS) has been used to predict the binary and ternary excess molar volumes and viscosities.

  15. Near-shore distribution of phyllosomas of the two only lobster species (Decapoda: Achelata present in Robinson Crusoe Island and endemic to the Juan Fernández archipelago Distribución costera de filosomas de las dos únicas especies de langostas (Decapoda: Achelata presentes en la Isla Robinson Crusoe y endémicas del archipiélago de Juan Fernández

    Directory of Open Access Journals (Sweden)

    ÁLVARO T PALMA

    2011-09-01

    Full Text Available Two lobster species coexist in the southeast Pacific Juan Fernández archipelago, Jasus frontalis (Milne-Edwards, 1837 and Acantharctus delfini (Bouvier, 1909. Like most lobster species they undergo a prolonged larval period, which is particularly long for J. frontalis (> 16 months. Though typical of Palinurids, this long larval duration is usually not thought to be conducive to local recruitment. While it is known that settlement is confined to the three islands of the archipelago (Robinson Crusoe, Alejandro Selkirk and Santa Clara and Desventuradas Islands (aprox. 800 km to the north, it remains poorly understood how local larval supply allows such distribution pattern. The goal of this study is twofold. Firstly, we aimed to characterize the distribution and abundance of the larvae of these two species around Robinson Crusoe Island using plankton tows and systematic hydrographic records between October 2008 to March of 2011, thus providing the first systematic and prolonged coupled biophysical observations in the nearshore of the archipelago. We hypothesize that spatial and temporal larval distribution patterns are associated to their retention around the archipelago, thus contributing to our knowledge of the physical and biological processes maintaining their extreme isolation. Secondly, using molecular genetics, we confirm a simple taxonomic criteria to distinguish the larvae of the two species, thus aiding future studies of larval dynamics. Throughout phyllosomas of A. delfini were more abundant than that of J. frontalis. Both species were more abundant on the northern shores of Robinson Crusoe Island and generally associated with warmer and saltier waters and mostly present in the samples collected during spring and summer months. Phyllosomas of both species were more abundant during nighttime tows in the upper layer of the water column surveyed suggesting a diurnal vertical migration behavior which, for coastal dwelling meroplanktonic

  16. Calvyn oor twyfel | Potgieter | Acta Theologica

    African Journals Online (AJOL)

    ... sinful human nature, causing anxiety and conflict in the faithful. Although it is part and parcel of Christian life, he condemns it as opposed to the will of God. He does, however, also express his compassion with those suffering under this duress. God expects the faithful to actively resist temptations of doubt and uncertainty.

  17. Discernment in 1 Thessalonians | Sciberras | Acta Theologica

    African Journals Online (AJOL)

    This article analyses Paul's use of δοκιμάζειν in 1 Thessalonians 5:21 within the context of verbs for discernment (δοκιμάζειν, πειράζειν, διακρίνειν and their cognates). It discusses Paul's use of these verbs against the background of discernment in the Septuaginta. Paul's own understanding of discernment is then further ...

  18. Acta Structilia - Vol 24, No 2 (2017)

    African Journals Online (AJOL)

    Deciphering priority areas for improving project risk management through critical analysis of pertinent risks in the Zambian construction industry · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. Chipozya Kosta Tembo-Silungwe, Nthatisi Khatleli, 1-43.

  19. Acta Theologica - Vol 28, No 2 (2008)

    African Journals Online (AJOL)

    Le Saint Esprit a yci pourtrait au vif ... Calvin's understanding of the Holy Spirit's modus operandi in the life of believers in the light of the preface to his Commentary on the Psalms · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. L Kayayan, 84-94 ...

  20. Acta Neuropsychiatrica; Tijdschrift voor een hedendaagse neuropsychiatrie.

    Science.gov (United States)

    Verhey, F H

    1989-09-01

    Samenvatting De psychiatrie benist op een evenwichtige combinatie van gedragswetenschappelijke (ontwikkelingspsychologische en sociale) en natuurwetenschappelijke (neuropsychiatri-sche) dementen. Ofschoon klinici werkzaam in de gezondheidszorg er vaak in slaagden dit evenwicht rede-lijk te handhaven, werd de officiële psychiatrie tot voor kort meestal nogal modieus gedomineerd door een van deze deelgebieden. Uitgroei tot volwassenheid van de psychiatrie vraagt in deze fase om een aanvulling van de in de laatste decennien sterk tot de verbeelding sprekende psychologische en sociale dementen met de verworvenhe-den van een nieuwe neuropsychiatrie. Geschetst wordt waar uit deze verworvenheden bestaan en hoe deze effectief in de psychiatrische gezondheidszorg onderwijs en onderzoek ingebouwd kunnen worden. Het binnen de psychiatrie tot ontwikkeling brengen van een toegepaste klinische psychofysiologie van essentieel belang.

  1. II Actas Congreso .¿Nuevos feminismos?

    OpenAIRE

    Pinyana i Garí, M. Carme

    2005-01-01

    ÍNDICE Presentación CONSOL AGUILAR RÓDENAS I. PONENCIAS La representación de la violencia / la violencia de la representación: De Jack el Destripador a Ciudad Juárez, pasando por la pantalla de la televisión,MARÍA RUIDO. Las apostillas al cuerpo: un ámbito de debates feministas, MERI TORRAS. Mujeres jóvenes y movimientos feministas: ¿Una nueva generación de feministas?,SHAMILLAH WILSON. La doble discriminación de las lesbianas,BEATRIZ GIMENO. II. MESAS REDONDAS ...

  2. Hippocrates: facts and fiction | Retief | Acta Theologica

    African Journals Online (AJOL)

    Hippocrates, the Father of Medicine, is reviewed as a historical person and in terms of his contribution to medicine in order to distinguish fact from fiction. Contemporary and later sources reveal that many (possibly untrue) legends accumulated around this enigmatic figure. The textual tradition and the composition of the ...

  3. Corruption: How should Christians respond? | Theron | Acta ...

    African Journals Online (AJOL)

    The results of the 2010 Corruption Perceptions Index of Transparency International indicate the seriousness of the worldwide corruption problem. Although recent decades have witnessed a global public awareness and an increase in attempts to eradicate corruption, it is an ongoing problem. It is evident that legislation is ...

  4. Acta Theologica 2010 Supplementum 13 Second Edition

    African Journals Online (AJOL)

    2009-12-21

    64) occurs, with an a-theoretical understanding in which the greatest .... recognised qualitative research methods, are further mapped out, with specific ..... pertaining to pastoral care, the focus in the case of futures studies is the.

  5. Praying Through Kenosis | Williams | Acta Theologica

    African Journals Online (AJOL)

    ... means that prayer is a reality as it really affects God, and changes the future, and, on the other hand, retains the traditional view of God as totally sovereign, which includes his omniscience. Then, if God's approach to people is kenotic, the response of people to God, especially in prayer, should likewise be in the humility of

  6. bladet. Acta Periodica Rerum Interiorum Bibliotecae Universitatis

    DEFF Research Database (Denmark)

    2007-01-01

    Temanummer med billeder, interwievs og personaleberetninger om Syddansk Universitetsbiblioteks afdeling i Østergade i Odense 1968-2007. Redaktører m.m. Erik Hellerup Madsen og Søren Mogensen sammen med redaktørgruppen Projekt Fra Glemmebogen. Yderligere bidrag kan findes i Projekt Fra Glemmebogen....

  7. Mystical Perspectives in Interreligious Dialogue | Waaijman | Acta ...

    African Journals Online (AJOL)

    The article reflects, first of all, on Paul's reaction to the questions and challenges of the Epicurean and Stoic philosophers in his audience that relates to this distinction. A second part will investigate the mystical unity of the unknowable God and his body language in Christ. In a third part some mystical perspectives on this ...

  8. Acta theologica supplementum 12-2009

    African Journals Online (AJOL)

    University of the Free State

    alist perspective on the significance of involving the intended audience in the ... churches” is the most important strategy of the United Bible Societies (UBS). ... translation drafts, raising local support, and marketing of the translated Scrip ture.

  9. Acta theologica supplementum 12-2009

    African Journals Online (AJOL)

    University of the Free State

    This paper compares the use of these terms in English translations with that of episkopos in ..... (literally, elders, from which is derived the transliteration, priests). Moreover, ..... The American Heritage dictionary of the English language. 4th ed.

  10. Acta theologica supplementum 12-2009

    African Journals Online (AJOL)

    University of the Free State

    radie 1986, De Vries, Willemyns en Burger 1994, Raidt 1980, Van der Wal 1994,. Van Zijl 1992, en Wikipedia, de vrije .... Pare wat gaan trou het, het 'n Statenbijbel as geskenk gekry. Vaders het driemaal per .... verhaal is in tyd en ruimte ver verwyder van die SuidAfrika van Du Toit. Deur gebruik te maak van buitelandse en ...

  11. The death of Cleopatra | Retief | Acta Theologica

    African Journals Online (AJOL)

    Death occurred very rapidly and the bodies showed no recognisable snake bite wounds. Fatal viper bites are characteristically associated with prominent, swollen and haemorrhagic wounds. Cobras may cause rapid death in spite of minor bite wounds, but in order to kill three adults, the snake would have to be large.

  12. Acta Theologica - Vol 33, No 2 (2013)

    African Journals Online (AJOL)

    Entering the Corridors of Power: State and Church in the Reception History of Revelation · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT DOWNLOAD FULL ... When Kingdoms are Kingdoms no more: A social-scientific reading of the Mustard Seed (Lk 13:18-19) · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT

  13. Acta theologica supplementum 12-2009

    African Journals Online (AJOL)

    University of the Free State

    of Yoruba identity formation and the Yoruba antislavery struggle in the 1800s will help ... identifications across multiple dialects and has given women and lower ... and Catholic liberation theology inflict a certain degree of social disruption on in .... cultural path of Christianity in West Africa from Islam” (Peel 2000:189). Earlier.

  14. What is spirituality? | Waaijman | Acta Theologica

    African Journals Online (AJOL)

    This essay provides, first of all, a historical perspective on the nature of spirituality by investigating its early forms, followed by a discussion of two approaches in the last century. It then investigates three basic forms of spirituality, concluding with an overview of elements of spirituality.

  15. Conformity in Christ | Waaijman | Acta Theologica

    African Journals Online (AJOL)

    This essay investigates the notion of conformity in Christ as it is part of a comprehensive, multilayered process of transformation. In the first part it focuses on the process of transformation in creation, re-creation, conformity, love and glory. In the second part it discusses transformation in Christ by looking at conformation and ...

  16. Acta theologica supplementum 12-2009

    African Journals Online (AJOL)

    University of the Free State

    The Kurumans of the world are now teaching London about mission. The pe ... agency that took the Gospel and its benefits from the centre of the British. Empire and spread them abroad through the work of missionaries and other agents.

  17. Investigation on molecular interactions of binary mixtures of isobutanol with 1-alkanols (C1 - C6) at different temperatures. Application of the Peng-Robinson-Stryjek-Vera (PSRV) equation of state (EOS)

    Science.gov (United States)

    Khanlarzadeh, K.; Iloukhani, H.; Soleimani, M.

    2017-07-01

    Densities were measured for binary mixtures of isobutanol with 1-alkanols, namely: methanol, ethanol, 1-propanol, 1-butanol, 1-pentanol and 1-hexanol at the temperatures of (288.15, 298.15 and 308.15) K and ambient pressure. Excess molar volumes, VmE , thermal expansion coefficients α, excess thermal expansion coefficients αE, and isothermal coefficients of pressure excess molar enthalpy, (∂HmE / ∂ P) T , x , were derived from the experimental data and the computed results were fitted to the Redlich-Kister equation. The Peng-Robinson-Stryjek-Vera (PRSV) equation of state was applied, in combination with simple mixing rules to predict the excess molar volume. The VmE results were positive for the mixtures of isobutanol with methanol, ethanol, 1-propanol, 1-butanol, and negative for isobutanol with 1-pentanol and 1-hexanol over the whole composition range. The results showed very small deviations from the behavior of ideal solutions in these mixtures and were analyzed to discuss the nature and strength of intermolecular interactions.

  18. Robinson Rancheria Strategic Energy Plan; Middletown Rancheria Strategic Energy Plan, Scotts Valley Rancheria Strategic Energy Plan, Elem Indian Colony Strategic Energy Plan, Upperlake Rancheria Strategic Energy Plan, Big Valley Rancheria Strategic Energy Plan

    Energy Technology Data Exchange (ETDEWEB)

    McGinnis and Associates LLC

    2008-08-01

    The Scotts Valley Band of Pomo Indians is located in Lake County in Northern California. Similar to the other five federally recognized Indian Tribes in Lake County participating in this project, Scotts Valley Band of Pomo Indians members are challenged by generally increasing energy costs and undeveloped local energy resources. Currently, Tribal decision makers lack sufficient information to make informed decisions about potential renewable energy resources. To meet this challenge efficiently, the Tribes have committed to the Lake County Tribal Energy Program, a multi Tribal program to be based at the Robinson Rancheria and including The Elem Indian Colony, Big Valley Rancheria, Middletown Rancheria, Habematolel Pomo of Upper Lake and the Scotts Valley Pomo Tribe. The mission of this program is to promote Tribal energy efficiency and create employment opportunities and economic opportunities on Tribal Lands through energy resource and energy efficiency development. This program will establish a comprehensive energy strategic plan for the Tribes based on Tribal specific plans that capture economic and environmental benefits while continuing to respect Tribal cultural practices and traditions. The goal is to understand current and future energy consumption and develop both regional and Tribe specific strategic energy plans, including action plans, to clearly identify the energy options for each Tribe.

  19. Modelling (vapour + liquid) and (vapour + liquid + liquid) equilibria of {water (H2O) + methanol (MeOH) + dimethyl ether (DME) + carbon dioxide (CO2)} quaternary system using the Peng-Robinson EoS with Wong-Sandler mixing rule

    International Nuclear Information System (INIS)

    Ye Kongmeng; Freund, Hannsjoerg; Sundmacher, Kai

    2011-01-01

    Highlights: → Phase behaviour modelling of H 2 O-MeOH-DME under pressurized CO 2 (anti-solvent) using PRWS. → PRWS-UNIFAC-PSRK has better performance than PRWS-UNIFAC-Lby in general. → Reliable to extend the VLE and VLLE phase behaviour from binary to multicomponent systems. → Successful prediction of the VLE and VLLE of binary, ternary, and quaternary systems. → Potential to apply the model for designing new DME separation process. - Abstract: The (vapour + liquid) equilibria (VLE) and (vapour + liquid + liquid) equilibria (VLLE) binary data from literature were correlated using the Peng-Robinson (PR) equation of state (EoS) with the Wong-Sandler mixing rule (WS). Two group contribution activity models were used in the PRWS: UNIFAC-PSRK and UNIFAC-Lby. The systems were successfully extrapolated from the binary systems to ternary and quaternary systems. Results indicate that the PRWS-UNIFAC-PSRK generally displays a better performance than the PRWS-UNIFAC-Lby.

  20. El Espíritu, memoria y testimonio de Cristo. A propósito de la «Tertio Millennio Adveniente», Actas del IX Simposio de Teología histórica (Reseña)

    OpenAIRE

    Luque-Alcaide, E. (Elisa)

    1998-01-01

    Reseña del libro de Alfonso ESPONERA CERDÁN (ed.), El Espíritu, memoria y testimonio de Cristo. A propósito de la «Tertio Millennio Adveniente», Actas del IX Simposio de Teología histórica, Facultad de Teología San Vicente Ferrer («Series Valentina» 40), Valencia 1997,528 pp.

  1. Daniel Gallego Hernández (Ed.). Enfoques actuales en traducción económica e institucional. Actas del Congreso Internacional de Traducción Económica, Comercial, Financiera e Institucional. Suiça: Editorial Peter Lang, 2015. 254 p.

    OpenAIRE

    Miguel Tolosa Igualada

    2016-01-01

    Daniel Gallego-Hernández (ed.). Current Approaches to Business and Institutional Translation. Proceedings of the International Conference on Economic, Business, Financial and Institutional Translation / Enfoques actuales en traducción económica e institucional. Actas del Congreso Internacional de Traducción Económica, Comercial, Financiera e Institucional. Suíça: Peter Lang, 2015, 254 páginas. ISBN 978-3-0343-1656-9.

  2. Daniel Gallego Hernández (Ed.. Enfoques actuales en traducción económica e institucional. Actas del Congreso Internacional de Traducción Económica, Comercial, Financiera e Institucional. Suiça: Editorial Peter Lang, 2015. 254 p.

    Directory of Open Access Journals (Sweden)

    Miguel Tolosa Igualada

    2016-05-01

    Full Text Available http://dx.doi.org/10.5007/2175-7968.2016v36n2p291 Daniel Gallego Hernández (Ed.. Enfoques actuales en traducción económica e institucional. Actas del Congreso Internacional de Traducción Económica, Comercial, Financiera e Institucional. Suiça: Editorial Peter Lang, 2015. 254 p.

  3. Significance of calculated cluster conformations of benzene: comment on a publication by D. E. Williams

    NARCIS (Netherlands)

    van de Waal, B.W.

    1981-01-01

    Results of potential-energy minimization, applied to clusters of benzene molecules, have been reported recently by Williams [Acta Cryst. (1980), A36, 715-723]. Two stable tridecamer clusters were found and compared with a 13-molecule fragment from crystalline orthorhombic benzene. In this comment

  4. C9H14N

    Indian Academy of Sciences (India)

    J. Chem. Sci. Vol. 128, No. 7, July 2016, pp. 1037–1045. c Indian Academy of ..... Teraski O, Barry J C and Thomas J M 1987 Nature ... Betteridge P W, Carruthers J R, Cooper R I, Prout K and ... Clegg W and Watson D G 2007 Acta Cryst.

  5. Structural study of nanosized yttrium-doped CaMnO3 perovskites

    Indian Academy of Sciences (India)

    Administrator

    Mater. 10 2461. Rodriguez-Carvajal J 1990 Collected abstract of powder di- ffraction meeting, Toulouse, p. 127. Shannon R D 1976 Acta Cryst. A32 751. Woodward P M, Vogt T, Cox D E, Arulraj A, Rao C N R,. Karen P and Cheetham A K 1998 Chem. Mater. 10 3652. Wunderlich F, Leisegang T and Weissbach T 2010 Phys.

  6. Dynamic quantum crystallography

    DEFF Research Database (Denmark)

    Hoser, Anna A.; Madsen, Anders Østergaard

    2017-01-01

    In the first paper of this series [Hoser & Madsen (2016). Acta Cryst. A72, 206-214], a new approach was introduced which enables the refinement of frequencies of normal modes obtained from ab initio periodic computations against single-crystal diffraction data. In this contribution, the performance...

  7. Punane Veski ja plakatikunsti algus / Riina Robinson

    Index Scriptorium Estoniae

    Robinson, Riina

    2007-01-01

    Prantsuse plakatikunsti loojast Jules Cheret'st, ühest silmapaistvamast plakati- ja maalikunstnikust Henri Toulouse-Lautrecist, tema plakatite kangelannadest, kankaani tantsinud Louise Weberist ja Jane Avrilist ning Moulin Rouge'ist

  8. Picasso kõrge hind / Riina Robinson

    Index Scriptorium Estoniae

    Robinson, Riina

    2007-01-01

    Pablo Picassost, tema loomingust, 2003.a Malagas Picasso muuseumi ja kunstniku sünnikodu avamisest, maailma kallemailt müüdud maalide TOP 10-sse kuuluvatest maalidest "Poiss piibuga" (1905) ja "Dora Maar kassiga" (1941), hindadest. Maailma kalleimad oksjonil müüdud maalid: I - Jackson Pollocki "Nr.5, 1948" (hind:140 miljonit dollarit), II - William De Kooningi "Woman III" (1952-53), III - Gustav Klimti "Adele Bloch-Bauer I portree" (1907)

  9. Pärlid juveelide kuningannad / Riina Robinson

    Index Scriptorium Estoniae

    Robinson, Riina

    2008-01-01

    Pärlite erinevatest kasutusviisidest. Pärlite kandmise ajaloost. Kuulsad pärlid: Pearl of Allah, La Peregrina, La Pellegrina, La Perle Napoleon. Kunstpärlite tootmisest. Pärlite kasvatamisest Jaapanis

  10. Enantioselective solvent-free Robinson annulation reactions

    Indian Academy of Sciences (India)

    Unknown

    solvents to effect an asymmetric synthesis is an important step forward towards ... In continuation of our preliminary communication 2, we wish to ..... formation of chiral enamine 74 from the reaction of S-proline with pro-R carbonyl group.

  11. Genetics Home Reference: Snyder-Robinson syndrome

    Science.gov (United States)

    ... differences in the size and shape of the right and left sides of the face (facial asymmetry). Other signs ... this polyamine clearly impacts normal development, including the development of the brain, muscles, and bones, but it is unknown how ...

  12. RETHINKING VOLKS V ROBINSON: THE IMPLCATIONS OF ...

    African Journals Online (AJOL)

    Anon

    was never married to S and therefore could not qualify as a "spouse" for the purpose of the Act. 20 ... Moreover, the position of unmarried couples could not be ..... incomprehensible, but, when compared to the ease with which the courts have.

  13. Authors: JA Robinson and R Prinsloo

    African Journals Online (AJOL)

    10060537

    parenting or child nurturing. 10. M v Minister of Police 2013 5 SA 622 (GNP) para 43. 11. Heystek v Heystek 2002 2 SA 754 (T) 757 E-G. 12 ..... shocks and perils of harsh family and neighbourhood environments. The function of the law is to create conditions to protect children from abuse and to maximise the opportunities ...

  14. Moemärke Hispaaniast / Riina Robinson

    Index Scriptorium Estoniae

    Robinson, Riina

    2008-01-01

    Kuulsad Hispaania moekunstnikud Paco Rabanne (sünd. 1934), Cristobal Balenciaga, Agatha Ruiz de la Prada (sünd. 1960), Oscar de la Renta (1932), Paloma Picasso (1949). Rõivapoodide ketid Zara, Mango ja El Corte Ingles

  15. “Una vez triunfantes las armas del ejército francés en Puebla”. De las actas de adhesión de la ciudad de Puebla y de los pueblos en el distrito de Cholula, 1863

    OpenAIRE

    Becerril Hernández, Carlos de Jesús

    2016-01-01

    Este artículo analiza las opiniones de los habitantes de Cholula y Puebla contenidas en las actas de adhesión al Imperio mexicano redactadas inmediatamente después del triunfo del ejército francés en mayo de 1863. Estos instrumentos jurídicos, pese a las descalificaciones de los historiadores adictos al régimen republicano, representan miradores privilegiados de las primeras impresiones de un sector de la sociedad poblana abiertamente partidaria de la Intervención. Dejando aparte la polémica ...

  16. Spanish participation in the Conference on Security and Cooperation in Europe (CSCE: contributions to the Helsinki Final Act | La participación española en la Conferencia para la Seguridad y la Cooperación en Europa (CSCE: aportaciones al Acta Final de Helsinki

    Directory of Open Access Journals (Sweden)

    Ana Capilla Casco

    2015-12-01

    Full Text Available The Conference on Security and Cooperation in Europe announcement provided Francoist Spain an excellent opportunity to join a multilateral forum aiming to promote security in Europe as well as a détente between the West and the Soviet Union. Spanish diplomacy, despite the relative international isolation of the country and the limits derived from the authoritarian nature of the Regime, designed a negotiation strategy contributing to gaining visibility and providing valuable contributions to the Final Act, such as the incorporation of the text on Mediterranean security. They also reached a wording of the Act principles agreeable to Spain’s interest and to the progress made in United Nations. On the basis of the analysis of the Spanish delegation reports, this article studies both the lights of the work done in Helsinki and Geneva and its shades, the latter being identified with the red lines established by the Francoist Regime. In terms of human rights and especially regarding free circulation and exchange of information. | La convocatoria de la Conferencia para la Seguridad y la Cooperación en Europa brindó una ocasión excelente a la España franquista para poder participar en un foro multilateral destinado a promover la seguridad en Europa y la distensión entre Occidente y la Unión Soviética. La diplomacia española, pese al relativo aislamiento al que seguía sometido el país y las limitaciones que se derivaban de la naturaleza autoritaria del Régimen, trazó una estrategia negociadora que le permitió ganar visibilidad y realizar aportaciones destacadas al Acta Final, como la incorporación del texto sobre la seguridad en el Mediterráneo. Del mismo modo, logró que la redacción de los principios del Acta fuera conforme a los intereses de España y se preservaran los logros alcanzados en Naciones Unidas. Este artículo tiene por objeto estudiar, a partir del análisis de los informes redactados por la propia delegación espa

  17. USO DA EQUAÇÃO DE ESTADO DE PENG-ROBINSON COM REGRA DE MISTURA DEPENDENTE DA COMPOSIÇÃO NA PREDIÇÃO DO EQUILÍBRIO DE FASES DO SISTEMA TERNÁRIO CO2-LIMONENO-CITRAL

    Directory of Open Access Journals (Sweden)

    Alessandra Lopes de OLIVEIRA

    1997-12-01

    Full Text Available Dados de equilíbrio de fases a pressões elevadas dos sistemas binários CO2-Limoneno e CO2-Citral e do sistema ternário CO2-Limoneno-Citral foram coletados da literatura e usados na modelagem termodinâmica que emprega a equação de estado de PENG-ROBINSON [1] com: 1 Regra de mistura clássica; 2 Regra de mistura dependente da composição de STRYJEK & VERA [2]. Os parâmetros de interação binária entre CO2-Limoneno e CO2-Citral foram obtidos pelo ajuste dos modelos a dados experimentais, fazendo uso de dois programas computacionais, os quais envolvem a minimização de uma função objetivo, pelo método Simplex de NELDER & MEAD (3, que foi escrita em termos dos desvios relativos entre os pontos experimentais e os calculados pelos modelos. O equilíbrio de fases do sistema ternário foi calculado utilizando-se os parâmetros de interação binária ajustados previamente e considerando parâmetros nulos entre os componentes Limoneno e Citral. A análise dos resultados indica, para as condições supercríticas, que os dois modelos foram capazes de predizer qualitativamente o sistema ternário, fornecendo resultados compatíveis, em ordem de grandeza, com os valores experimentais.Phase equilibrium data at high pressures for CO2-Limonene and CO2-Citral binary systems and for CO2-Limonene-Citral ternary systems were collected from literature and employed in a thermodynamic modelling that uses the PENG-ROBINSON equation of state with: (1 classical mixture rule; (2 STRYJEK & VERA composition dependant mixture rule. The binary interaction parameters for the CO2-Limonene and CO2-Citral systems were obtained by fitting the models to the experimental data using two computational programmes that involved the minimisation of an objective function by the simplex method as suggested by NELDER & MEAD, written as a function of the deviation between experimental and calculated data. The phase equilibrium for the ternary systems was calculated using the

  18. [Book review] Cowbirds and Other Brood Parasites by Catherine Ortega. Tucson, Arizona: University of Arizona Press (1998). The Avian Brood Parasites: Deception at the Nest by Paul A. Johnsgard. New York: Oxford University Press (1997) Parasitic Birds and their Hosts: Studies in Coevolution edited by S.I. Rothstein & S.K. Robinson. New York: Oxford University Press (1998)

    Science.gov (United States)

    Hahn, D.C.

    1999-01-01

    We are in a golden age for the study of brood parasitism, judging from both the quantity and quality of recent scientific publications on cuckoos, cowbirds and parasitic finches by investigators working in Europe, the Americas, Africa and Asia. As Johnsgard (1997) remarks in his preface, the evolutionary, ecological, and behavioural questions posed by obligate brood parasites are among the most intriguing contemporary ornithological topics. Rothstein & Robinson (1998) explain that brood parasites make ideal subjects for testing the generality of models for the evolution of social and mating behaviour, foraging behaviour, spatial distribution, and vocal development, because the strategy of providing no parental care removes constraints imposed on other birds. Since Aristotle, people have been fascinated by brood parasites, but only in the past two decades has the number of investigators working on this topic reached a critical mass and created momentum that promises many breakthroughs. New studies are being completed so rapidly that a general book is inevitably out of date on some topics by the time it is published. A complete library on brood parasitism should add two recent volumes (Morrison et al. 1999; Smith et al., in press).to the three reviewed here.

  19. Die Afrikaans van die bybelvertaling van 1933 1 | Steyn | Acta ...

    African Journals Online (AJOL)

    The first translators of the Bible had to start their work before the standardisation of Afrikaans. This article firstly explores the difficulties encountered by the Bible translators in breaking with the language of the Statenbijbel. Secondly, it is indicated how translators were able to utilise the insights of linguists and language ...

  20. Radical Orthodoxy - Its ecumenical vision | Ward | Acta Theologica

    African Journals Online (AJOL)

    The first book in the Series Radical Orthodoxy (RO) was not meant to be programmatic or set out to change the direction of modern theology. There are certain shared sensibilities among its authors and, principally, an ecumenical vision. This article sketches the nature of that ecumenical vision that begins with the way in ...

  1. Narrative preaching - yet another perspective | Van Rensburg | Acta ...

    African Journals Online (AJOL)

    The theme of narrative preaching has been widely discussed for more than a decade. However, only recently did the interest in this form of communication of the gospel of Jesus Christ become apparent within the congregational context. Ministers increasingly find it necessary to adopt a new approach in preaching.

  2. Open-Ended Narrative and Moral Formation | Klaasen | Acta ...

    African Journals Online (AJOL)

    The PDF file you selected should load here if your Web browser has a PDF reader plug-in installed (for example, a recent version of Adobe Acrobat Reader). If you would like more information about how to print, save, and work with PDFs, Highwire Press provides a helpful Frequently Asked Questions about PDFs.

  3. Narrative temporality and Johannine symbolism: research | Ito | Acta ...

    African Journals Online (AJOL)

    ? To investigate this is the purpose of this article. The notion of narrative temporality is not new in the study of Biblical texts. However, there have not been many studies which make this notion their main thrust. Rather, generally speaking, it has ...

  4. The illnesses of Herod the Great | Retief | Acta Theologica

    African Journals Online (AJOL)

    Herod the Great, Idumean by birth, was king of the Jews from 40BC to AD 4. An able statesman, builder and warrior, he ruthlessly stamped out all perceived opposition to his rule. His last decade was characterised by vicious strife within his family and progressive ill health. We review the nature of his illnesses and suggest ...

  5. Acta Theologica 2005: 1 RESENSIES/REVIEWS Trouble in the ...

    African Journals Online (AJOL)

    Bridges,. Presbyterian Leaders in 19th Century Australia, Melbourne 1993, p.19.) In .... last words. Added ..... But the author calls our attention to the shift from the old con- fessional ... A broad theme such as 2000 years of Christianity requires a selective approach ..... Such fees may be recouped from earnings on research.

  6. Towards a Spirituality of Peace | De Villiers | Acta Theologica

    African Journals Online (AJOL)

    This article contributes towards designing a Spirituality of Peace within Spirituality as a discipline. It first analyses the increasing attention to violence and peace generally and within religious contexts specifically. It then critically evaluates some approaches that view violence and peace as moral issues and shows how these ...

  7. Gelukkig hij die uw kinderen zal grijpen' | Peels | Acta Theologica

    African Journals Online (AJOL)

    Happy is he who seizes your infants…. Hermeneutical and biblical-theological positioning of the Old Testament imprecations. The Old Testament contains many prayers for the shaming, punishment or destruction of the godless, especially in the Psalms. This imprecatory prayer, which still forms one of the most troublesome ...

  8. Thomas Aquinas: On Law, Tyranny and Resistance | Swartz | Acta ...

    African Journals Online (AJOL)

    Thomas Aquinas's notion on law, tyranny and resistance served as a limitation on governmental powers. When those who bear the law command things which exceed the competence of such authority, the subject is free to obey or disobey. The function of the law culminates in two maxims: quantum ad vim coactivam legis ...

  9. Tumours and cancers in Graeco-Roman times | Retief | Acta ...

    African Journals Online (AJOL)

    In Hippocratic literature tumours were mainly classified as karkinômata, phumata and oidêmata. Phumata included a large variety of tumours, inflammatory and neoplastic in origin, and mostly benign (in modern terms), whilst oidêmata were soft, painless tumours and even included generalised oedema (dropsy). Although ...

  10. Godsdiens: Middel tot verslawing of tot heling? | Coetzer | Acta ...

    African Journals Online (AJOL)

    There are two sides to religion, on the one hand the threat that implies emotional pain and addiction, on the other hand the healing and liberating effect of a balanced and healthy religion. In this article the focus is on the former. Factors which render people vulnerable to spiritual addiction are put on the table. Similarities ...

  11. Paul, military imagery and social disadvantage | Punt | Acta ...

    African Journals Online (AJOL)

    In the past, attention for the social position or standing of the early Jesus followers was overrun by concerns for the theological and religious dimensions of those communities. The role of the Roman Empire and the impact of its military forces on the lives of people have generated even less attention. Paul's use of military ...

  12. Jesus, history and the gospels: research | Moyise | Acta Theologica

    African Journals Online (AJOL)

    This article considers the reasons why modern scholars have felt the need to go behind the four Gospels and search for the historical Jesus. After a short discussion on methodology, especially the criteria used to detect the earliest and most reliable traditions about Jesus, a number of recent proposals are discussed: Jesus ...

  13. Contours of Biblical spirituality as a discipline | Welzen | Acta ...

    African Journals Online (AJOL)

    ... divine human relational process. A dialogue of spirituality and exegesis is needed. For doing research a threefold competence is needed: in exegesis, in spirituality and in the integration of these two. The final section is about intertextuality. Intertextuality may help to understand the spiritual process in reading biblical texts.

  14. Interview with Piet J. Naudé | Laubscher | Acta Theologica

    African Journals Online (AJOL)

    ... The Netherlands. His thesis explored the relation between theory and practice in Latin-American Liberation Theologies and the work of Johann Baptist Metz. As Humboldt scholar, he later built a special academic relation with Michael Welker in Heidelberg (Germany) and with the Centre for Theological Inquiry at (USA).

  15. Egyptian personal piety and Israel's wisdom literature | Fischer | Acta ...

    African Journals Online (AJOL)

    This article evaluates the movement of Egyptian personal piety and its relation to Israelite wisdom texts. Hymns and prayers of personal piety developed in the New Kingdom at the same time as "heretic" Harpers' songs and love songs. The personal piety affected also the genre of instructions. The instruction of Amenemope ...

  16. A new framework for Bible translation | Wilt | Acta Theologica

    African Journals Online (AJOL)

    ... as well as translators and choosing a particular translation approach in terms of mutually agreed upon goals. The Bible translation process may involve not just producing a text to represent the sacred text, but also supplementary texts to enhance understanding and appreciation of both the translation and the translated.

  17. The language ecology of a new Afrikaans Bible | Ponelis | Acta ...

    African Journals Online (AJOL)

    Three sets of codes are germane to a current Afrikaans Bible translation: Dutch, English and varieties of Afrikaans, especially Standard Afrikaans. Dutch was established as a local language of culture in the Dutch era from 1652 to 1806. The sweeping transformation of Cape society by British colonial rule gave great impetus ...

  18. A new leadership for a new ecclesiology | Mothoagae | Acta ...

    African Journals Online (AJOL)

    While many berate the poor level of leadership in the Church, it is noticeable that the same complaint is made about leadership in the corporate world. It is the authors' contention that the new ecclesiology that has been spoken and written about during the past decades cannot be implemented until there is a change in the ...

  19. Persecution in the book of Revelation | De Villiers | Acta Theologica

    African Journals Online (AJOL)

    In this article attention will be given to scholarly interpretations of persecution in Revelation with special attention to their theoretical, hermeneutical and theological implications. After an introductory discussion of the traditional interpretation of a ";real"; persecution in a Domitianic setting, attention will be given to the recent ...

  20. Poverty Relief or Poverty Eradication? | Kritzinger | Acta Theologica

    African Journals Online (AJOL)

    The author challenges the reader to make two mindshifts: from a focus on poverty relief to an emphasis on poverty eradication; and from viewing the poor as the objects of poverty alleviation to accepting them as the subjects of poverty eradication. The case is argued and a practical approach towards poverty eradication is ...

  1. Snake and staff symbolism in healing | Retief | Acta Theologica

    African Journals Online (AJOL)

    Since time immemorial the snake has been venerated as an enigmatic creature with supernatural powers. As a snake and staff symbol it is also traditionally associated with the healing arts, either as the single-snake attribute of Asclepius, or as the doublesnake attribute of Hermes. In this article the mythological basis for this ...

  2. Etiese Besluitneming Volgens 1 Johannes | van der Watt | Acta ...

    African Journals Online (AJOL)

    http://dx.doi.org/10.4314/actat.v33i2.12 · AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians · for Authors · FAQ's · More about AJOL · AJOL's Partners · Terms and Conditions of Use · Contact AJOL · News. OTHER RESOURCES... for Researchers · for Journals · for Authors · for Policy Makers ...

  3. Kom ons skryf 'n Psalm! | Snyman | Acta Theologica

    African Journals Online (AJOL)

    psalms of the setting in life (Sitz im Leben) of the psalms. Due to the personal nature of the psalms, the exact setting in life was even deliberately obscured. This should caution modern day researchers of the canonical Psalms to be mindful of the fact ...

  4. Power and authority in Matthew's gospel | Viljoen | Acta Theologica

    African Journals Online (AJOL)

    Besides the strenuous relation of Matthew's community with non-Christian kinfolk, his text also reveals an underlying conflict with Roman Imperial ideology. Herod, Antipas and Pilate specifically impersonate this foreign domination. Apparently these figures have unlimited power which leaves Jesus and his followers as ...

  5. Skrif en Kerkorder/Scripture and church order | Celliers | Acta ...

    African Journals Online (AJOL)

    This enables the congregation to adhere to its calling for obedience, love, and witness, so that the church can continue to exist. The outlines of the nature and order of the church should be addressed in all church orders to avoid pragmatism and arbitrariness on the one hand, and to create space for the various demands of ...

  6. Lead poisoning in ancient Rome | Retief | Acta Theologica

    African Journals Online (AJOL)

    Lead was known to the ancients from at least the 4th millennium BC, but its use increased markedly during Roman times, to the extent that it became a health hazard. Mines and foundry furnaces caused air pollution; lead was extensively used in plumbing; domestic utensils were made of lead and pewter, and lead salts ...

  7. A third monoclinic polymorph of 3,4,5-trihydroxybenzoic acid monohydrate

    Directory of Open Access Journals (Sweden)

    Güneş Demirtaş

    2011-06-01

    Full Text Available The title compound, C7H6O5·H2O, is a new polymorph of the structures reported by Jiang et al. (2000 [Acta Cryst. C56, 594–595] and Okabe et al. (2001 [Acta Cryst. E57, o764–o766]. The gallic acid molecule is essentially planar (r.m.s. deviation = 0.550 Å. An intramolecular O—H...O hydrogen bond occurs in the gallic acid molecule, which is linked to the water molecule by a further O—H...O hydrogen bond. In the crystal, the components are linked by O—H...O hydrogen bonds. The hydrogen-bonding pattern differs from those reported for the previous polymorphs.

  8. 2-Vinylpyridine–tris(pentafluorophenylborane hexane monosolvate

    Directory of Open Access Journals (Sweden)

    Marcus Klahn

    2012-04-01

    Full Text Available The title compound, C7H7N·B(C6F53·C6H14, was obtained by the stoichiometric reaction of 2-vinylpyridine and tris(pentafluorophenylborane in toluene. The formed adduct exhibits a restricted rotation along the B—N bond resulting in an asymmetry, which can be also observed in the 19F NMR spectra. The B—N distance is equivalent to the distances found for 2-methylpyridine and 2-ethylpyridine B(C6F53 adducts. For the final refinement, the contributions of disordered solvent molecules were removed from the diffraction data with SQUEEZE in PLATON [van der Sluis & Spek (1990. Acta Cryst. A46, 194–201; Spek (2009. Acta Cryst. D65, 148–155].

  9. Targeted Basic Studies of Ferroelectric and Ferroelastic Materials for Piezoelectric Transducer Applications.

    Science.gov (United States)

    1983-03-01

    Ann . Freq. Control Symp., Atlantic City, NJ, 110 (1979). 2.12 L. Bohaty and S. Haussühl, Acta Cryst. A33, 114 (1977). 2.13 B.J. Luymes, Ph.D. Thesis...Maas. (1967). 6. J. van Men Boomgaard, DJL Terrell , RJU. Bom sad HS JX Ciller, J. Mat. Set«, 1705(1974). 7. AJ4J.G. van Run. DJt. Terrell

  10. Untitled

    Indian Academy of Sciences (India)

    3, Garrido, J. . . C.R. Acad. Sci., 1950, 230, 1878. 4. Guan Ya-Siyan, Simonov, Docklady Acad. Sci., USSR, 1963, 149, 146. V.I., and Belov, N. V.. 5. Hoppe, W. . . Acta Cryst., 1963, 16, 1056,. 6. Main, D. and Woolfson, Ibid., 1963, 16, 1046. : M. M.. 7. McLachlan, D. and Proc. Nat. Acad. Sei, USA, 1957, 37, 846,. Harker, D. 8.

  11. Redetermination of 1,4-dimethoxybenzene

    OpenAIRE

    David M. Grant; Ronald J. Pugmire; James K. Harper; Atta M. Arif; Cody L. Hoop; Robbie Iuliucci

    2009-01-01

    The structure of the centrosymmetric title compound, C8H10O2, originally determined by Goodwin et al. [Acta Cryst.(1950), 3, 279–284], has been redetermined to modern standards of precision to aid in its use as a model compound for 13C chemical-shift tensor measurements in single-crystal NMR studies. In the crystal structure, a C—H...O interaction helps to establish the packing.

  12. Sociedad de Estudios de Patología Quirúrgica de la Facultad de Medicina de Bogotá: estatutos: Estudio e Investigación. Reglamento: Tolerancia por las ideas ajenas (Acta de los días 4 y 11 de junio

    Directory of Open Access Journals (Sweden)

    Roberto N. Ezpeleta H.

    1932-11-01

    Full Text Available El día 4 de junio a las 10 de la mañana se reunió la "Sociedad de Estudios de Patología Quirúrgica" en el salón de proyecciones adjunto al Laboratorio de Rayos X del Hospital. Presidió la sesión el Profesor Jorge E. Cavelier. Asistieron a ella los Profesores Corpas y Salgar, y los doctores Herrera Salgar y Jiménez. Suárez Una vez leída el acta de la sesión anterior, el doctor Herrera Salgar presentó un curioso caso sobre apéndice doble, dando una relación de él y mostrando unas placas anatomo-patológicas muy demostrativas. En seguida tomó la palabra el Profesor Corpas quien se refirió al caso presentado por el doctor Herrera Salgar, caso que, dijo, era tanto más interesante cuanto que se refería a una apendicitis crónica, pues muchas veces se presentaban falsos apéndices dobles. en las apendicitis agudas en las que el apéndice sufre a veces una especie de estrangulación cuya parte libre es injertada en el ciego semejando un apéndice doble. Dijo que el apéndice tenía por objeto suministrar una hormona cuyo papel es activar el peristaltismo intestinal, lo cual se puede comprobar por la constipación habitual de que son víctimas los apendicectomizados. Hizo referencias a las anomalías en la especie humana, como manifestaciones de evolución regresiva, y mostró cómo en el caso particular de apéndice doble éste estan frecuente en los hervíboros.

  13. Accelerated Exploration of Multi-principal Element Alloys for Structural Applications (Postprint)

    Science.gov (United States)

    2015-04-27

    S. Ranganathan, High Entropy Alloys, Butterworth-Hei- nemann, London, UK, 2014. [6] B. Cantor , I.T.H. Chang, P. Knight, A.J.B. Vincent, Mater. Sci...Kristallogr.-Cryst. Mater. 230 (2015) 55–68. [14] B. Cantor , Entropy 16 (2014) 4749–4768. [15] O.N. Senkov, C. Woodward, D.B. Miracle, JOM. 66 (2014...2014) 1973–1983. [21] F. Otto, Y. Yang, H. Bei, E.P. George , Acta Mater. 61 (2013) 2628–2638. [22] K.Y. Tsai, M.H. Tsai, J.W. Yeh, Acta Mater. 61

  14. Children's rights in the South African Constitution | Robinson ...

    African Journals Online (AJOL)

    Potchefstroom Electronic Law Journal/Potchefstroomse Elektroniese Regsblad. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 6, No 1 (2003) >. Log in or Register to get access to full text downloads.

  15. L’écriture du temps dans Robinson Crusoe

    OpenAIRE

    Bulckaen, Denise

    2018-01-01

    “Le récit est une séquence deux fois temporelle... il y a le temps de la chose-racontée et le temps du récit (temps du signifié et temps du signifiant)”. Cette citation se trouve au début du chapitre que Genette consacre à “Ordre” dans Figures III. Elle s'applique à de nombreux romans, mais elle est particulièrement intéressante quand on considère le roman de forme autobiographique. Le décalage entre “le temps du signifié” et “le temps du signifiant” est plus ou moins grand selon les romans. ...

  16. 78 FR 12648 - Airworthiness Directives; Robinson Helicopter Company

    Science.gov (United States)

    2013-02-25

    ... Safety Engineer, Los Angeles Aircraft Certification Office, Transport Airplane Directorate, FAA, 3960... maintenance people to do their jobs and not add to this burden of it looks good on paper world.'' We do not..., Los Angeles Aircraft Certification Office, Transport Airplane Directorate, FAA, 3960 Paramount Blvd...

  17. Nukkude salapärane maailm / Riina Robinson

    Index Scriptorium Estoniae

    Robinson, Riina

    2007-01-01

    Nukkudest, nende ajaloost, valmistamisviisidest ja materjalidest, kasutamise eesmärkidest, matrjoshkadest, barbie'st, seksikatest Bratz-nukkudest ja nende mõjust laste psüühhikale, nukust kui moe propageerijast ning nukumööblist

  18. BOOK REVIEW: COMPLEX HOUSING. DESIGNING FOR DENSITY, JULIA WILLIAMS ROBINSON

    Directory of Open Access Journals (Sweden)

    Ombretta Romice

    2017-11-01

    Full Text Available This is a clear, useful and practical book, which makes an important link between research in environment-behaviour studies and practice, in this case architecture, urbanism and planning. The goal of the book is straightforward: to analyse ‘complex housing’, here defined as middle-high density, with a mix of tenures, uses and renting/ownership ranges, and of urban significance, in a structured and consistent manner, and with a degree of professional criticism stemming both from the author’s view and that of a range of professionals involved in the projects illustrated. The context selected is the Netherlands, a country that for geographic, political, cultural and religious reasons has had a rather special and successful record in dealing with density in housing both from an architectural and urban point of view, at least until recently, as the author reminds us (‘spatial plans’ have been abandoned in 2005.

  19. Knowing linguistic conventions | Robinson | South African Journal of ...

    African Journals Online (AJOL)

    These are three standard accounts of the epistemic status of linguistic conventions, which all play into the first camp: (1) knowledge by intuition, (2) inferential a priori knowledge and (3) a posteriori knowledge. I give reasons why these accounts should be rejected. I then argue that linguistic conventions, if conceived of as ...

  20. 76 FR 35330 - Airworthiness Directives; Robinson Helicopter Company Model (Robinson) R22, R22 Alpha, R22 Beta...

    Science.gov (United States)

    2011-06-17

    ... state that the requirement does not add to safety, will require keeping the maintenance logbook in the aircraft, and will ``visually pollute'' the logbook distracting from seeing real maintenance trends. Upon... logbook'' and distract from seeing real maintenance trends. Operators may make the entries on a separate...

  1. The Ste locus, a component of the parasitic cry-Ste system of Drosophila melanogaster, encodes a protein that forms crystals in primary spermatocytes and mimics properties of the beta subunit of casein kinase 2

    DEFF Research Database (Denmark)

    Bozzetti, M P; Massari, S; Finelli, P

    1995-01-01

    Males of Drosophila melanogaster lacking the Y chromosome-linked crystal locus show multiple meiotic alterations including chromosome disorganization and prominent crystal formation in primary spermatocytes. These alterations are due to the derepression of the X chromosome-linked Stellate sequenc...

  2. Density- and wavefunction-normalized Cartesian spherical harmonics for l ≤ 20.

    Science.gov (United States)

    Michael, J Robert; Volkov, Anatoliy

    2015-03-01

    The widely used pseudoatom formalism [Stewart (1976). Acta Cryst. A32, 565-574; Hansen & Coppens (1978). Acta Cryst. A34, 909-921] in experimental X-ray charge-density studies makes use of real spherical harmonics when describing the angular component of aspherical deformations of the atomic electron density in molecules and crystals. The analytical form of the density-normalized Cartesian spherical harmonic functions for up to l ≤ 7 and the corresponding normalization coefficients were reported previously by Paturle & Coppens [Acta Cryst. (1988), A44, 6-7]. It was shown that the analytical form for normalization coefficients is available primarily for l ≤ 4 [Hansen & Coppens, 1978; Paturle & Coppens, 1988; Coppens (1992). International Tables for Crystallography, Vol. B, Reciprocal space, 1st ed., edited by U. Shmueli, ch. 1.2. Dordrecht: Kluwer Academic Publishers; Coppens (1997). X-ray Charge Densities and Chemical Bonding. New York: Oxford University Press]. Only in very special cases it is possible to derive an analytical representation of the normalization coefficients for 4 4 the density normalization coefficients were calculated numerically to within seven significant figures. In this study we review the literature on the density-normalized spherical harmonics, clarify the existing notations, use the Paturle-Coppens (Paturle & Coppens, 1988) method in the Wolfram Mathematica software to derive the Cartesian spherical harmonics for l ≤ 20 and determine the density normalization coefficients to 35 significant figures, and computer-generate a Fortran90 code. The article primarily targets researchers who work in the field of experimental X-ray electron density, but may be of some use to all who are interested in Cartesian spherical harmonics.

  3. Neutron time-of-flight techniques for investigation of the extinction effect

    International Nuclear Information System (INIS)

    Niimura, N.; Tomiyoshi, S.; Takahashi, J.; Harada, J.

    1975-01-01

    An application of the time-of-flight neutron diffraction technique to an investigation of the nature of the extinction effect in a single-crystal specimen is given. It is shown that the wavelength dependence of the extinction can be easily obtained by changing the scattering angle. An estimation of the extinction factor for a CuCl single crystal is given as an example and a comparison of the results with recent extinction theory [Becker and Coppens. Acta Cryst.(1974). A30, 129-147; 148-153] is made. (Auth.)

  4. Tetraammineplatinum(II dichloride ammonia tetrasolvate

    Directory of Open Access Journals (Sweden)

    Tobias Grassl

    2014-07-01

    Full Text Available The title compound, [Pt(NH34]Cl2·4NH3, was crystallized in liquid ammonia from the salt PtCl2. The platinum cation is coordinated by four ammonia molecules, forming a square-planar complex. The chloride anions are surrounded by nine ammonia molecules, either bound within the platinum complex or solvent molecules. The solvent ammonia molecules are packed in such a way that an extended network of N—H...N and N—H...Cl hydrogen bonds is formed. The structure is isotypic with [Pd(NH34]Cl2·4NH3 [Grassl & Korber (2014. Acta Cryst. E70, i32].

  5. Bis{μ-cis-1,3-bis[(di-tert-butylphosphanyloxy]cyclohexane-κ2P:P′}bis[carbonylnickel(0] including an unknown solvent molecule

    Directory of Open Access Journals (Sweden)

    Klara J. Jonasson

    2014-05-01

    Full Text Available The title compound, [Ni2(C22H46P2O22(CO2], is located about a centre of inversion with the Ni0 atom within a distorted trigonal–planar geometry. The cyclohexyl rings are in the usual chair conformation with the 1,3-cis substituents equatorially oriented. No specific intermolecular interactions are noted in the crystal packing. A region of disordered electron density, most probably a disordered deuterobenzene solvent molecule, was treated using the SQUEEZE routine in PLATON [Spek (2009. Acta Cryst. D65, 148–155]. Its formula mass and unit-cell characteristics were not taken into account during refinement.

  6. Abacavir methanol 2.5-solvate

    Directory of Open Access Journals (Sweden)

    Phuong-Truc T. Pham

    2009-08-01

    Full Text Available The structure of abacavir (systematic name: {(1S,4R-4-[2-amino-6-(cyclopropylamino-9H-purin-9-yl]cyclopent-2-en-1-yl}methanol, C14H18N6O·2.5CH3OH, consists of hydrogen-bonded ribbons which are further held together by additional hydrogen bonds involving the hydroxyl group and two N atoms on an adjacent purine. The asymmetric unit also contains 2.5 molecules of methanol solvate which were grossly disordered and were excluded using SQUEEZE subroutine in PLATON [Spek, (2009. Acta Cryst. D65, 148–155].

  7. Redetermination and absolute configuration of atalaphylline

    Directory of Open Access Journals (Sweden)

    Hoong-Kun Fun

    2010-02-01

    Full Text Available The title acridone alkaloid [systematic name: 1,3,5-trihydroxy-2,4-bis(3-methylbut-2-enylacridin-9(10H-one], C23H25NO4, has previously been reported as crystallizing in the chiral orthorhombic space group P212121 [Chantrapromma et al. (2010. Acta Cryst. E66, o81–o82] but the absolute configuration could not be determined from data collected with Mo radiation. The absolute configuration has now been determined by refinement of the Flack parameter with data collected using Cu radiation. All features of the molecule and its crystal packing are similar to those previously described.

  8. Redetermination of tetrakis(N,N-diethyldithiocarbamatotin(IV

    Directory of Open Access Journals (Sweden)

    Coco K. Y. A. Okio

    2009-06-01

    Full Text Available The crystal structure of the title compound, [Sn(C5H10NS24], was originally determined by Harreld & Schlemper [Acta Cryst. (1971, B27, 1964–1969] using intensity data estimated from Weissenberg films. In comparison with the previous refinement, the current redetermination reveals anisotropic displacement parameters for all non-H atoms, localization of the H atoms, and higher precision of lattice parameters and interatomic distances. The complex features a distorted S6 octahedral coordination geometry for tin and a cis disposition of the monodentate dithiocarbamate ligands.

  9. Redetermination of 1-naphthaleneacetic acid

    Directory of Open Access Journals (Sweden)

    Li-Jian Liu

    2008-12-01

    Full Text Available The crystal structure of the title compound, C12H10O2, was originally determined by Rajan [Acta Cryst. (1978. B34, 998–1000] using intensity data estimated from Weissenberg films. This redetermination provides a structure with significantly improved precision with respect to the geometric parameters. In the crystal structure, intermolecular O—H...O hydrogen bonds, weak C—H...O hydrogen bonds and C—H...π interactions link the molecules into a two-dimensional sheet lying parallel to (100.

  10. 1-[2,2-Bis(1,3-benzimidazol-1-ylmethyl-3-bromopropyl]-1,3-benzimidazole

    Directory of Open Access Journals (Sweden)

    Tai-Bao Wei

    2011-07-01

    Full Text Available The title compound, C26H23BrN6, has been synthesized as a potential ligand for the construction of metal–organic frameworks. The three benzimidazolyl groups present three potential coordination nodes. The dihedral angles between the benzimidazole ring systems are 74.03 (10, 66.49 (9 and 74.09 (9°. The structure contains large voids, which contain highly disordered solvent molecules that may be CH3CH2OH. Since the solvent molecules could not be located, the PLATON/SQUEEZE procedure [Spek (2009. Acta Cryst. D65, 148–155] was used.

  11. Chemical Stockpile Disposal Program Final Programmatic Environmental Impact Statement Volume 3: Appendices A-S

    Science.gov (United States)

    1988-01-01

    Parts of the Guinea-Pig Eye," Acta. Pharmacol. Toxicol. 38, 299-307. Lynch, M. R., Rice, M. A., and Robinson, S. W. 1986. "Dissociation of Locomotor ...34Effects of the Organophosphorus Compound, 0-ethyl-N-dimethyl-phosphoramidocyanidate (Tabun), on Flavor Aversions, Locomotor Activity, and Rotarod...R. M. 1979. "Disappearance of Hydrocarbons Following a Major Gasoline Spill in the Ohio River," pp. 503-507 in Developments in Industrial

  12. “One in christ”: Fedsem spiritualities of solidarity | Duncan | Acta ...

    African Journals Online (AJOL)

    The spiritual life of the seminary, manifested most clearly in its worship life, became its source of strength and sustained its mission and vision: to be and yet, to become “One in Christ”. This was conveyed by means of various forms of denominational and ecumenical solidarity as an expression of Christian love.

  13. Klaagliedere 3:42: vergifnis of nie-vergifnis? | O'Kennedy | Acta ...

    African Journals Online (AJOL)

    Lamentations 3 speaks about punishment, but not rejection or unwillingness to forgive. The worshipper in verse 42 confronts God with his real self: He is supposed to forgive. In the rest of chapter 3 we find reminders of God's forgiving heart: mercy and compassion (vv. 22, 32); faithfulness (v. 23); kindness (vv. 25, 26, 27); ...

  14. “Showing respect” in bible translation | van der Spuy | Acta Theologica

    African Journals Online (AJOL)

    This article focuses on the way respect is shown by using 2nd person personal pronouns in languages that distinguish between you plural (you all), you honorific (polite) and you singular (familiar) forms. It discusses the likely influence of the well known Russian Synodal Translation on other translations in the former Soviet ...

  15. Turismo Musical y Festivales. Actas del I Congreso Internacional de Turismo Musical y Festivales

    OpenAIRE

    Martín Gómez-Ullate García de León; Pilar Barrios Manzano; Juana Gómez Pérez

    2017-01-01

    The University of Extremadura hosted the 1st International Conference in Musical Tourism and Festivals 17-18 December 2015. This conference was a space for exchange between stakeholders and academics the musical tourism and festivals fields to learn from other areas and sectors; it will include keynotes, stakeholder-led discussion groups and parallel papers & posters considering and showcasing the delivery and assessment of engaged and impactful research. Spain and Portugal hold great pot...

  16. Digitalization of "Acta Stomatologica Croatica" Journal (1966;1 - 1999;33).

    Science.gov (United States)

    Borić, Vesna

    2014-09-01

    Modern documents, scientific articles and books are primarily issued in electronic form and their availability depends on the publisher's, or the document owner's, business ethics. The primary purpose of publishing a scientific article is to communicate with the scientific and professional community; therefore, the published article has to be available worldwide. The question is: Who really needs scientific papers from the 1960's? In cases of brilliant and bold visionaries, new concepts and scientific discoveries often come before their time; hence they have to be "reinvented" decades later. Besides, the scientists of today can enter the spiritual spheres of their professional ancestors and give respect to their legacy.
We have processed more than 1 200 articles published by 1999 and entered more than
6 000 names and surnames of authors.

  17. In search of the original text in Mark 9:38 | Hendriks | Acta Theologica

    African Journals Online (AJOL)

    The question remains which text appears to be the more original one. Several scholars – such as Vaganay, Duplacy, Amphoux, and others – in search of the original text of Mark – opt for a so called Western text, the main stream still prefers the Neutral text of Westcott and Hort. A text-critical analysis of Mark 9:38 may provide ...

  18. Actas III Jornadas de Propiedad Intelectual. Los soportes en los que se recogen tangibles e intangibles.

    OpenAIRE

    Domenech Martínez, Gloria

    2013-01-01

    En estos tiempos tan convulsos que nos ha tocado vivir, es necesario proteger los derechos de propiedad intelectual para fomentar el crecimiento económico, la innovación y la creatividad. Las medidas destinadas a salvaguardar los derechos de propiedad intelectual (DPI) y a luchar contra la falsificación y la piratería en el mercado interior abarcan tanto el ámbito penal como el civil, sin olvidar el ámbito mercantil, jurisdicción especial en el campo civil. Sin relegar la pe...

  19. La dinámica participativa en las actas de reuniones del CONEI

    Directory of Open Access Journals (Sweden)

    Lilia Calderón Almerco

    2012-12-01

    Full Text Available The dynamism of participation in the minutes of the CONEI meetings This is a discussion about the results of a documentary research about the participative dynamics into the minutes of the CONEI (Consejo Educativo Institucional meetings of four public schools from Lima. The qualitative analysis of the minutes reveals that the participation characterizes for being formal, bureaucratic, unidirectional and conflicted; that is focused in the administrative and economic issues of the educational management. The discourse expresses an ideal vision about participation but negative about conflict. Also, the participation in the meeting is considered like being in the meeting, and the leadership of the principal and the teachers stands out, however, the students and parents are excluded or autoexcluded.

  20. Rethinking the demarcation of Malachi 2:17-3:5 | Snyman | Acta ...

    African Journals Online (AJOL)

    emarcating a unit remains important for the interpretation and understanding of the particular unit in a (Biblical) book. In the case of the book of Malachi, the majority of scholars adhere to the traditional demarcation of the fourth unit in the book of Malachi (2:17-3:5). Closer investigation reveals that the matter is not as settled ...

  1. Tax Evasion and the Impact on Economic Growth Acta Universitatis Danubius. OEconomica

    Directory of Open Access Journals (Sweden)

    Shkendije Demalijaj Ukaj

    2014-12-01

    Full Text Available The level of taxation is very important for the development of current and future of a country and fiscal policy should always be considered as an important factor in the behavior of participants and their ability to tax evasion and informality. Government fiscal policies can trigger tax increase under pressure, especially in situations such as economic crisis, inflation, unemployment, instability, when the burden of this obligation grows, its effects are considered to take them to tax evasion and informality (Dragomir. et al. 2011. However, these reasons do not relate to all the great presence of this phenomenon in Kosovo, taking into account the recent economic crisis has not reflected in the economy of Kosovo and the Kosovo tax burden is among the lowest in the region, but leading cause of tax evasion and informality can be considered above the corruption of public administration officials including tax and customs officials, insufficient staff for his fighting, weak rule of law, as well as lower fiscal culture for paying taxes. For this reason the scope of this paper will be the theoretical treatment of the informal economy and tax evasion in view of tax avoidance, meaning, characteristics and their effects on the economy and possible recommendations on these viewpoints.

  2. “Bond of love”: The action of the spirit | Williams | Acta Theologica

    African Journals Online (AJOL)

    The ancient idea, seen especially in Augustine, is that the main activity of the Spirit is that of providing relationship, as the “bond of love”; this provides a key concept which undergirds the work of the Spirit in creation, redemption, sanctification and empowering. It is hoped that increased understanding of the work of the Spirit ...

  3. Actas I Simposio Iberoamericano de Ecología Reproductiva, Reclutamiento y Pesquerías

    OpenAIRE

    Saborido-Rey, Fran; Macchi, Gustavo; Murua, Hilario

    2009-01-01

    El I Simposio Iberoamericano de Ecología Reproductiva, Reclutamiento y Pesquerías (Sibecorp) surge en respuesta a la inquietud de investigadores de Iberoamérica por fomentar la colaboración entre países de uno y otro lado del Atlántico, en el reconocimiento de que la pesca es un recurso económico vital en Latinoamérica, España y Portugal. Son numerosos los grupos de investigación que desarrollan su labor en el campo de la ecología pesquera y que profundizan en el concepto de sostenibili...

  4. The interpretation and translation of galatians 5:12 | Tolmie | Acta ...

    African Journals Online (AJOL)

    As is evident from commentaries on Galatians and from various English translations, scholars do not agree on the meaning, rhetorical labelling and translation of the wish expressed by Paul in Galatians 5:12 ( [Ofelon kai; ajpokovyontai oiJ ajnastatou` nte” uJma`”). In this article various interpretations of this verse are ...

  5. Respek vir die liturgiese teks: J. Calvyn en J.S. Bach | Schulze | Acta ...

    African Journals Online (AJOL)

    Despite obvious differences in terms of historical and theological aspects between Calvin and Bach, both share a respect for the priority of the Biblical text in worship.The anomaly between Calvin's engagement in the versification of the Psalter and Bach's preference for the literal (rather than a versified) use of the Biblical ...

  6. Actas do 1º Encontro do Mel das Arribas do Douro - ArribasMel 2004

    OpenAIRE

    Marcos, Adérito

    2004-01-01

    1º Encontro do Mel das Arribas do Douro - ArribasMel 2004, Solar dos Marcos, Bemposta, Mogadouro, 27 Março 2004 Livro de resumos do 1º Encontro do Mel das Arribas do Douro - ArribasMel 2004, realizado no Solar dos Marcos, Bemposta, Mogadouro, 27 de Março 2004.

  7. ACTA-EVER lecture 2007 - The retinal pigment epithelium: friend or foe?

    DEFF Research Database (Denmark)

    La Cour, Morten

    2008-01-01

    proliferating RPE cells. By means of 5-bromo-2-deoxyuridine (BrdU) labelling, we studied the proliferation of RPE cells in the porcine eye after experimental posterior pole injury. Surprisingly, we found that only the peripheral RPE cells incorporated the BrdU label, indicating that central injury elicits...... for long contact times between therapeutic, and non-toxic, concentrations of 5-FU and the RPE Udgivelsesdato: 2008/9...

  8. Twentieth-century English Bible translations | Naudé | Acta Theologica

    African Journals Online (AJOL)

    The twentieth century has emerged as a major period of Bible translations and publications. The article explores both the cultural and social circumstances under which the English Bible translations of the twentieth century were produced and aspects relating to the translation process and reception. It offers insights into the ...

  9. Acta Theologica 2015: 2 207 M. Nel Identity-driven churches: Who ...

    African Journals Online (AJOL)

    and systematic study that produces a wealth of contextual biblical ideas concerning ... debates and empirical data that have emerged and are still emerging concerning ... conversation lies a challenge: to recover and deepen the church's.

  10. Tax Evasion and the Impact on Economic Growth Acta Universitatis Danubius. OEconomica

    OpenAIRE

    Shkendije Demalijaj Ukaj

    2014-01-01

    The level of taxation is very important for the development of current and future of a country and fiscal policy should always be considered as an important factor in the behavior of participants and their ability to tax evasion and informality. Government fiscal policies can trigger tax increase under pressure, especially in situations such as economic crisis, inflation, unemployment, instability, when the burden of this obligation grows, its effects are considered to take them t...

  11. Acta Oncologica Lecture. Gastrointestinal consequences of cancer treatment and the wider context: a bad gut feeling.

    Science.gov (United States)

    Muls, Ann Cecile

    2014-03-01

    The percentage of people living with a diagnosis of cancer is rising globally. Between 20% and 25% of people treated for cancer experience a consequence of cancer which has an adverse impact on the quality of their life. Gastrointestinal (GI) symptoms are the most common of all consequences of cancer treatment and have the greatest impact on daily activity. PATHOPHYSIOLOGY OF LONG-TERM BOWEL DAMAGE AFTER PELVIC RADIOTHERAPY: Long-term damage to the bowel after radiotherapy is mediated by ischaemic changes and fibrosis. Each fraction of radiotherapy causes a series of repetitive injuries to the intestinal tissue resulting in an altered healing process, which affects the integrity of the repair and changes the architecture of the bowel wall. THE NATURE OF GI SYMPTOMS THAT DEVELOP: Patient-reported outcome measures show that diarrhoea, urgency, increased bowel frequency, tenesmus and flatulence are the five most prevalent GI symptoms with a moderate or severe impact on patients' daily lives after treatment with pelvic radiotherapy. Many patients also experience fatigue, urinary problems and have sexual concerns. SYSTEMATIC ASSESSMENT AND MANAGEMENT: The complex nature of those symptoms warrants systematic assessment and management. The use of a tested algorithm can assist in achieving this. The most common contributing factors to ongoing bowel problems after pelvic radiotherapy are small intestinal bacterial overgrowth, bile acid malabsorption, pancreatic insufficiency, rectal bleeding and its impact on bone health. Symptom burden, socio-psychosocial impact, memory and cognitive function, fatigue, urinary problems and sexual concerns need to be taken into account when thinking about consequences of cancer treatment. As our understanding of consequences of cancer treatments continues to emerge and encompass a wide variety of specialties, a holistic, multifaceted and multidisciplinary approach is required to manage those consequences long-term.

  12. Causes of death among the Caesars (27 BC-AD 476) | Retief | Acta ...

    African Journals Online (AJOL)

    The Roman Empire was ruled by 77 emperors between 27 BC and AD 476 (503 years); 18 (23,4%) of them held sway during the Early Empire (27 BC–AD 193, 220 years), and 59 (76,6%) during the Late Empire (193-476, 283 years). On the average emperors in the Early Empire ruled for a longer period (12,7 years as ...

  13. The XChemExplorer graphical workflow tool for routine or large-scale protein–ligand structure determination

    Science.gov (United States)

    Krojer, Tobias; Talon, Romain; Pearce, Nicholas; Douangamath, Alice; Brandao-Neto, Jose; Dias, Alexandre; Marsden, Brian

    2017-01-01

    XChemExplorer (XCE) is a data-management and workflow tool to support large-scale simultaneous analysis of protein–ligand complexes during structure-based ligand discovery (SBLD). The user interfaces of established crystallo­graphic software packages such as CCP4 [Winn et al. (2011 ▸), Acta Cryst. D67, 235–242] or PHENIX [Adams et al. (2010 ▸), Acta Cryst. D66, 213–221] have entrenched the paradigm that a ‘project’ is concerned with solving one structure. This does not hold for SBLD, where many almost identical structures need to be solved and analysed quickly in one batch of work. Functionality to track progress and annotate structures is essential. XCE provides an intuitive graphical user interface which guides the user from data processing, initial map calculation, ligand identification and refinement up until data dissemination. It provides multiple entry points depending on the need of each project, enables batch processing of multiple data sets and records metadata, progress and annotations in an SQLite database. XCE is freely available and works on any Linux and Mac OS X system, and the only dependency is to have the latest version of CCP4 installed. The design and usage of this tool are described here, and its usefulness is demonstrated in the context of fragment-screening campaigns at the Diamond Light Source. It is routinely used to analyse projects comprising 1000 data sets or more, and therefore scales well to even very large ligand-design projects. PMID:28291762

  14. The XChemExplorer graphical workflow tool for routine or large-scale protein-ligand structure determination.

    Science.gov (United States)

    Krojer, Tobias; Talon, Romain; Pearce, Nicholas; Collins, Patrick; Douangamath, Alice; Brandao-Neto, Jose; Dias, Alexandre; Marsden, Brian; von Delft, Frank

    2017-03-01

    XChemExplorer (XCE) is a data-management and workflow tool to support large-scale simultaneous analysis of protein-ligand complexes during structure-based ligand discovery (SBLD). The user interfaces of established crystallographic software packages such as CCP4 [Winn et al. (2011), Acta Cryst. D67, 235-242] or PHENIX [Adams et al. (2010), Acta Cryst. D66, 213-221] have entrenched the paradigm that a `project' is concerned with solving one structure. This does not hold for SBLD, where many almost identical structures need to be solved and analysed quickly in one batch of work. Functionality to track progress and annotate structures is essential. XCE provides an intuitive graphical user interface which guides the user from data processing, initial map calculation, ligand identification and refinement up until data dissemination. It provides multiple entry points depending on the need of each project, enables batch processing of multiple data sets and records metadata, progress and annotations in an SQLite database. XCE is freely available and works on any Linux and Mac OS X system, and the only dependency is to have the latest version of CCP4 installed. The design and usage of this tool are described here, and its usefulness is demonstrated in the context of fragment-screening campaigns at the Diamond Light Source. It is routinely used to analyse projects comprising 1000 data sets or more, and therefore scales well to even very large ligand-design projects.

  15. Validation of experimental molecular crystal structures with dispersion-corrected density functional theory calculations

    International Nuclear Information System (INIS)

    Streek, Jacco van de; Neumann, Marcus A.

    2010-01-01

    The accuracy of a dispersion-corrected density functional theory method is validated against 241 experimental organic crystal structures from Acta Cryst. Section E. This paper describes the validation of a dispersion-corrected density functional theory (d-DFT) method for the purpose of assessing the correctness of experimental organic crystal structures and enhancing the information content of purely experimental data. 241 experimental organic crystal structures from the August 2008 issue of Acta Cryst. Section E were energy-minimized in full, including unit-cell parameters. The differences between the experimental and the minimized crystal structures were subjected to statistical analysis. The r.m.s. Cartesian displacement excluding H atoms upon energy minimization with flexible unit-cell parameters is selected as a pertinent indicator of the correctness of a crystal structure. All 241 experimental crystal structures are reproduced very well: the average r.m.s. Cartesian displacement for the 241 crystal structures, including 16 disordered structures, is only 0.095 Å (0.084 Å for the 225 ordered structures). R.m.s. Cartesian displacements above 0.25 Å either indicate incorrect experimental crystal structures or reveal interesting structural features such as exceptionally large temperature effects, incorrectly modelled disorder or symmetry breaking H atoms. After validation, the method is applied to nine examples that are known to be ambiguous or subtly incorrect

  16. Covariance and correlation estimation in electron-density maps.

    Science.gov (United States)

    Altomare, Angela; Cuocci, Corrado; Giacovazzo, Carmelo; Moliterni, Anna; Rizzi, Rosanna

    2012-03-01

    Quite recently two papers have been published [Giacovazzo & Mazzone (2011). Acta Cryst. A67, 210-218; Giacovazzo et al. (2011). Acta Cryst. A67, 368-382] which calculate the variance in any point of an electron-density map at any stage of the phasing process. The main aim of the papers was to associate a standard deviation to each pixel of the map, in order to obtain a better estimate of the map reliability. This paper deals with the covariance estimate between points of an electron-density map in any space group, centrosymmetric or non-centrosymmetric, no matter the correlation between the model and target structures. The aim is as follows: to verify if the electron density in one point of the map is amplified or depressed as an effect of the electron density in one or more other points of the map. High values of the covariances are usually connected with undesired features of the map. The phases are the primitive random variables of our probabilistic model; the covariance changes with the quality of the model and therefore with the quality of the phases. The conclusive formulas show that the covariance is also influenced by the Patterson map. Uncertainty on measurements may influence the covariance, particularly in the final stages of the structure refinement; a general formula is obtained taking into account both phase and measurement uncertainty, valid at any stage of the crystal structure solution.

  17. Interactive comparison and remediation of collections of macromolecular structures.

    Science.gov (United States)

    Moriarty, Nigel W; Liebschner, Dorothee; Klei, Herbert E; Echols, Nathaniel; Afonine, Pavel V; Headd, Jeffrey J; Poon, Billy K; Adams, Paul D

    2018-01-01

    Often similar structures need to be compared to reveal local differences throughout the entire model or between related copies within the model. Therefore, a program to compare multiple structures and enable correction any differences not supported by the density map was written within the Phenix framework (Adams et al., Acta Cryst 2010; D66:213-221). This program, called Structure Comparison, can also be used for structures with multiple copies of the same protein chain in the asymmetric unit, that is, as a result of non-crystallographic symmetry (NCS). Structure Comparison was designed to interface with Coot(Emsley et al., Acta Cryst 2010; D66:486-501) and PyMOL(DeLano, PyMOL 0.99; 2002) to facilitate comparison of large numbers of related structures. Structure Comparison analyzes collections of protein structures using several metrics, such as the rotamer conformation of equivalent residues, displays the results in tabular form and allows superimposed protein chains and density maps to be quickly inspected and edited (via the tools in Coot) for consistency, completeness and correctness. © 2017 The Protein Society.

  18. A note on Robinson-Ursescu and Lyusternik-Graves theorem

    Czech Academy of Sciences Publication Activity Database

    Cibulka, R.; Fabian, Marián

    2013-01-01

    Roč. 139, 1-2 (2013), s. 89- 101 ISSN 0025-5610 R&D Projects: GA ČR(CZ) GAP201/11/0345 Institutional research plan: CEZ:AV0Z10190503 Keywords : open mapping * restrictive metricregularity * graves theorem Subject RIV: BA - General Mathematics Impact factor: 1.984, year: 2013 http://link.springer.com/article/10.1007%2Fs10107-013-0662-z

  19. H. B. Robinson Plant, Unit 2. Semiannual operating report No. 11, July--December 1975

    International Nuclear Information System (INIS)

    1976-01-01

    Net electrical power generated was 2,119,115 MW(e) with the generator on line 3,308 hrs. Information is presented concerning operation, power generation, shutdowns, corrective maintenance, occupational radiation exposure, release of radioactive materials, tests, inspections, refueling, and steam generator outage

  20. H. B. Robinson Plant, Unit 2. Semiannual operating report No. 10, January--June 1975

    International Nuclear Information System (INIS)

    1975-01-01

    Net electrical power generated was 2,051,619 MWH(e) with the reactor on line 3,063.39 hrs. Information is presented concerning power generation, shutdowns, corrective maintenance, chemistry and radiochemistry, occupational radiation exposure, release of radioactive materials, and abnormal occurrences. (FS)

  1. Extremal limits of the C metric: Nariai, Bertotti-Robinson, and anti-Nariai C metrics

    International Nuclear Information System (INIS)

    Dias, Oscar J.C.; Lemos, Jose P.S.

    2003-01-01

    In two previous papers we have analyzed the C metric in a background with a cosmological constant Λ, namely, the de-Sitter (dS) C metric (Λ>0), and the anti-de Sitter (AdS) C metric (Λ 0, Λ=0, and Λ 2 xS-tilde 2 ) to each point in the deformed two-sphere S-tilde 2 corresponds a dS 2 spacetime, except for one point which corresponds to a dS 2 spacetime with an infinite straight strut or string. There are other important new features that appear. One expects that the solutions found in this paper are unstable and decay into a slightly nonextreme black hole pair accelerated by a strut or by strings. Moreover, the Euclidean version of these solutions mediate the quantum process of black hole pair creation that accompanies the decay of the dS and AdS spaces

  2. Joan Robinson Meets Harold Hotelling: A Dyopsonistic Explanation of the Gender Pay Gap

    OpenAIRE

    Boris Hirsch

    2007-01-01

    This paper presents an alternative explanation of the gender pay gap resting on a simple Hotelling-style dyopsony model of the labor market. Since there are only two employers equally productive women and men have to commute and face travel cost to do so. We assume that a fraction of the women have higher travel cost, e.g., due to more domestic responsibilities. Employers exploit that women are less inclined to commute to their competitor and offer lower wages to women. Since women's labor su...

  3. Same-sex marriage in South Africa: The road ahead | Robinson ...

    African Journals Online (AJOL)

    n hierdie bydrae word die problematiek oor "huwelike" tussen persone van dieselfde geslag aan die orde gestel. 'n Oorsig word gebied oor die verskillende fasette van die debat en die argumente wat tipies daarin aangevoer word. Op grond van 'n teoretiese verantwoording oor die aard van die huwelik word standpunt oor ...

  4. The Schrödinger–Robinson inequality from stochastic analysis on a complex Hilbert space

    International Nuclear Information System (INIS)

    Khrennikov, Andrei

    2013-01-01

    We explored the stochastic analysis on a complex Hilbert space to show that one of the cornerstones of quantum mechanics (QM), namely Heisenberg's uncertainty relation, can be derived in the classical probabilistic framework. We created a new mathematical representation of quantum averages: as averages with respect to classical random fields. The existence of a classical stochastic model matching with Heisenberg's uncertainty relation makes the connection between classical and quantum probabilistic models essentially closer. In real physical situations, random fields are valued in the L 2 -space. Hence, although we model QM and not QFT, the classical systems under consideration have an infinite number of degrees of freedom. And in our modeling, infinite-dimensional stochastic analysis is the basic mathematical tool. (comment)

  5. IPTS [Integrated Pressurized-Thermal-Shock] study for H.B. Robinson (HBR-HYPO)

    International Nuclear Information System (INIS)

    Cheverton, R.D.

    1990-01-01

    A primary purpose of the US Nuclear Regulatory Commission (NRC) Integrated Pressurized-Thermal-Shock (IPTS) Program, completed in 1985, was to develop an integrated probabilistic approach for evaluating pressurized water reactor (PWR) pressure vessel integrity; and the scope included the application of the methodology to three ''high risk'' PWR plants. The three plants selected were Oconee Unit 1, Calvert Cliffs Unit 1, and HBRobinson Unit 2 (HBR-2); and the plant studies were conducted in that order. As a result of this sequence and the developmental nature of the program, the HBR-2 study was the more complete and state-of-the-art. However, by the time the HBR-2 study was conducted, a reevaluation of vessel chemistry and reference nil-ductility transition temperature (RT NDT ) had indicated relatively low concentrations of copper and nickel and low values of initial RT NDT (RT NDT 0 ), resulting in very low probabilities of failure. Thus, for illustrative purposes, copper, nickel, and RT NDT 0 were increased so that RT NDT (2σ) = 270 degree F for the critical weld at 32 EFPY. This value of RT NDT corresponds, of course, to the NRC PTS-Rule screening criteria (10 CFR 5.61). This hypothetical ''plant'' was referred to as HBR-HYPO, and it was identical to HBR-2 in every respect except for the concentrations of copper and nickel and the value of RT NDT 0 for the welds. 3 refs

  6. Spatial segregation of the endemic versus non-endemic hummingbird on Robinson Crusoe Island, Chile

    DEFF Research Database (Denmark)

    Vizentin-Bugoni, Jeferson; Sonne, Jesper; Hodum, Peter

    2017-01-01

    , little attention has been given to the influence of interspecific competition for floral nectar resources. In this study, we investigated the existence of interspecific competition by testing for spatial segregation of the two species using point counts dispersed within their suitable habitats. We...

  7. Jenefer Robinson. Deeper than Reason, Emotion and its Role in Literature, Music and Art

    OpenAIRE

    PHELAN, Richard

    2011-01-01

    This book sets out to examine the role of emotion in both the construction and reception of art. It begins by a survey of recent theories of emotion and then applies them to the action of emotion in the fields of literature, music and, to a lesser extent, painting. Part One thus addresses the question of what emotions are and how they operate. It considers in particular the theory of emotions as judgements as argued by philosophers Robert Gordon, Gabriele Taylor, Robert Solomon, and William L...

  8. Why, Mrs. Robinson? The seduction of teenage boys by women in classic films.

    Science.gov (United States)

    Colarusso, Calvin A

    2014-09-01

    Utilizing three classic films, and psychoanalytic developmental theory, this paper explores the conscious and unconscious reasons why older women become sexually involved with teenage boys. After a presentation of aspects of young adult and midlife female development and a psychodynamic explanation for the developmental similarities between adolescence and menopause, each of the three films is summarized. The dynamics behind the women's behavior, as presented in the films, are discussed. The third section of the paper discusses similarities and differences among the three women and the negative effects on the boys' development.

  9. 7 squadron in World War II (Part 1: 1942) | Robinson | Scientia ...

    African Journals Online (AJOL)

    Scientia Militaria: South African Journal of Military Studies. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 5, No 2 (1975) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF ...

  10. 7 squadron in World War II (Part 2: 1943-1945) | Robinson | Scientia ...

    African Journals Online (AJOL)

    Scientia Militaria: South African Journal of Military Studies. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 5, No 3 (1975) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF file you selected ...

  11. 76 FR 68512 - Carolina Power & Light Company; H. B. Robinson Steam Electric Plant, Unit 2; Exemption

    Science.gov (United States)

    2011-11-04

    ... postulated loss-of-coolant accident. Therefore, both of these regulations either state or assume that either... report BAW- 10227(P)(A), Revision1 addressed all of the important aspects of M5 with respect to ECCS... with respect to the loss-of- coolant accident (LOCA) applications. Appendix K, paragraph I.A.5, of 10...

  12. H. B. Robinson Plant, Unit 2. Annual operating report for 1976

    International Nuclear Information System (INIS)

    1977-01-01

    The unit achieved a good performance record through the year, experiencing only short duration shutdowns or power reductions. Information is presented concerning operations, maintenance, shutdowns, and occupational radiation exposures. In November there was a scheduled refueling lasting 40 days. After a start-up physics test program, the unit achieved 100 percent power on December 22, 1976

  13. Static and radiating p-form black holes in the higher dimensional Robinson-Trautman class

    Czech Academy of Sciences Publication Activity Database

    Ortaggio, Marcello; Podolský, J.; Žofka, M.

    2015-01-01

    Roč. 2015, č. 2 (2015), 045 ISSN 1029-8479 R&D Projects: GA ČR GB14-37086G Institutional support: RVO:67985840 Keywords : Einstein-Maxwell spacetimes * classical theories of gravity * black holes Subject RIV: BA - General Mathematics Impact factor: 6.023, year: 2015 http://link.springer.com/article/10.1007/JHEP02%282015%29045

  14. [Review of: Daron Acemoglu, James Robinson Why nations fail: the origins of power, prosperity, and poverty

    NARCIS (Netherlands)

    Moonen, Piet

    2015-01-01

    The basic theme of the book is what causes nations to fail where others succeed. The authors argue that the political institutions have a determining impact on the establishment of economic institutions.

  15. Effect of impurities and post-experimental purification in SAD phasing with serial femtosecond crystallography data.

    Science.gov (United States)

    Zhang, Tao; Gu, Yuanxin; Fan, Haifu

    2016-06-01

    In serial crystallography (SX) with either an X-ray free-electron laser (XFEL) or synchrotron radiation as the light source, huge numbers of micrometre-sized crystals are used in diffraction data collection. For a SAD experiment using a derivative with introduced heavy atoms, it is difficult to completely exclude crystals of the native protein from the sample. In this paper, simulations were performed to study how the inclusion of native crystals in the derivative sample could affect the result of SAD phasing and how the post-experimental purification proposed by Zhang et al. [(2015), Acta Cryst. D71, 2513-2518] could be used to remove the impurities. A gadolinium derivative of lysozyme and the corresponding native protein were used in the test. Serial femtosecond crystallography (SFX) diffraction snapshots were generated by CrystFEL. SHELXC/D, Phaser, DM, ARP/wARP and REFMAC were used for automatic structure solution. It is shown that a small amount of impurities (snapshots from native crystals) in the set of derivative snapshots can strongly affect the SAD phasing results. On the other hand, post-experimental purification can efficiently remove the impurities, leading to results similar to those from a pure sample.

  16. Crystal structure of a second triclinic polymorph of 2-methylpyridinium picrate

    Directory of Open Access Journals (Sweden)

    Jeganathan Gomathi

    2015-11-01

    Full Text Available The title molecular salt, C6H8N+·C6H2N3O7− (systematic name: 2-methylpyridinium 2,4,6-trinitrophenolate, crystallizes with two cations and two anions in the asymmetric unit. In the crystal, the cations are linked to the anions via bifurcated N—H...(O,O hydrogen bonds, generating R12(6 graph-set motifs. Numerous C—H...O hydrogen bonds are observed between these cation–anion pairs, which result in a three-dimensional network. In addition, weak aromatic π–π stacking between the 2-methylpyridinium rings [inter-centroid distance = 3.8334 (19 Å] and very weak stacking [inter-centroid distance = 4.0281 (16 Å] between inversion-related pairs of picrate anions is observed. The title salt is a second triclinic polymorph of the structure (also with Z′ = 2 reported earlier [Anita et al. (2006. Acta Cryst. C62, o567–o570; Chan et al. (2014. CrystEngComm, 16, 4508–4538]. In the title compound, the cations and anions display a chequerboard arrangement when viewed down [100], whereas in the first polymorph, (010 layers of alternating cations and anions are apparent in a [100] view. It is interesting that the unit-cell lengths are almost identical for the two polymorphs, although the inter-axial angles are quite different.

  17. EDM-DEDM and protein crystal structure solution.

    Science.gov (United States)

    Caliandro, Rocco; Carrozzini, Benedetta; Cascarano, Giovanni Luca; Giacovazzo, Carmelo; Mazzone, Anna Maria; Siliqi, Dritan

    2009-05-01

    Electron-density modification (EDM) procedures are the classical tool for driving model phases closer to those of the target structure. They are often combined with automated model-building programs to provide a correct protein model. The task is not always performed, mostly because of the large initial phase error. A recently proposed procedure combined EDM with DEDM (difference electron-density modification); the method was applied to the refinement of phases obtained by molecular replacement, ab initio or SAD phasing [Caliandro, Carrozzini, Cascarano, Giacovazzo, Mazzone & Siliqi (2009), Acta Cryst. D65, 249-256] and was more effective in improving phases than EDM alone. In this paper, a novel fully automated protocol for protein structure refinement based on the iterative application of automated model-building programs combined with the additional power derived from the EDM-DEDM algorithm is presented. The cyclic procedure was successfully tested on challenging cases for which all other approaches had failed.

  18. Expanding the structural landscape of niclosamide: a high Z ' polymorph, two new solvates and monohydrate HA

    DEFF Research Database (Denmark)

    Sovago, Ioana; Bond, Andrew D.

    2015-01-01

    to be twinned by twofold rotation around that axis. The acetonitrile molecules occupy channels in the structure. A complete structure is provided for niclosamide monohydrate, C13H8Cl2N2O4·H2O, polymorph HA, obtained by Rietveld refinement against laboratory powder X-ray diffraction data. It has been suggested...... that this compound is related to the methanol solvate of niclosamide [Harriss, Wilson & Radosevljevic Evans (2014). Acta Cryst. C70, 758-763], but it is found that the two are not fully isostructural: they contain isostructural two-dimensional layers, but the layers are arranged differently in the two structures....... This suggests that HA may have the potential for polytypism, and features in the Rietveld difference curve indicate that a polytype fully isostructural with the methanol solvate might be present....

  19. Structural redetermination of the ThNi phase

    International Nuclear Information System (INIS)

    Fornasini, M.L.

    1983-01-01

    Msub(r) = 290.8, orthorhombic, Pnma, a = 14.146(6), b = 4.286(3), c = 5.702(3) A, V = 345.7 A 3 , Z = 8, Dsub(x) = 11.17 Mg m - 3 , F(000) = 944, room temperature, lambda (Mo Kα) = 0.71069 A, μ(Mo Kα) = 138 mm - 1 , final R = 0.049 for 306 observed reflections. Contrary to the report of Florio, Baenziger and Rundle [Acta Cryst. (1956), 9, 367-372], ThNi was found to crystallize in a stacking variant of the CrB-FeB types with trigonal-prismatic coordination of the Ni atoms, and recognized to be isotypic with the SrAg phase, having stacking code (hc) 2 . (Auth.)

  20. Disorder effects in Mn(12)-acetate at 83 K.

    Science.gov (United States)

    Cornia, Andrea; Fabretti, Antonio Costantino; Sessoli, Roberta; Sorace, Lorenzo; Gatteschi, Dante; Barra, Anne-Laure; Daiguebonne, Carole; Roisnel, Thierry

    2002-07-01

    The structure of hexadeca-mu-acetato-tetraaquadodeca-mu(3)-oxo-dodecamanganese bis(acetic acid) tetrahydrate, [Mn(12)O(12)(CH(3)COO)(16)(H(2)O)(4)] x 2CH(3)COOH x 4H(2)O, known as Mn(12)-acetate, has been determined at 83 (2) K by X-ray diffraction methods. The fourfold (S(4)) molecular symmetry is disrupted by a strong hydrogen-bonding interaction with the disordered acetic acid molecule of solvation, which displaces one of the acetate ligands in the cluster. Up to six Mn(12) isomers are potentially present in the crystal lattice, which differ in the number and arrangement of hydrogen-bonded acetic acid molecules. These results considerably improve the structural information available on this molecular nanomagnet, which was first synthesized and characterized by Lis [Acta Cryst. (1980), B36, 2042-2046].

  1. Tetraamminepalladium(II dichloride ammonia tetrasolvate

    Directory of Open Access Journals (Sweden)

    Tobias Grassl

    2014-07-01

    Full Text Available The title compound, [Pd(NH34]Cl2·4NH3, was crystallized in liquid ammonia from the salt Pd(enCl2 (en is ethylenediamine and is isotypic with [Pt(NH34]Cl2·4NH3 [Grassl & Korber (2014. Acta Cryst. E70, i31]. The Pd2+ cation is coordinated by four ammonia molecules, exhibiting a square-planar geometry. The chloride anions are surrounded by nine ammonia molecules. These are either bound in the palladium complex or solvent molecules. The packing of the ammonia solvent molecules enables the formation of an extended network of N—H...N and N—H...Cl interactions with nearly ideal hydrogen-bonding geometry.

  2. Crystal structure of rubidium peroxide ammonia disolvate

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    Tobias Grassl

    2017-02-01

    Full Text Available The title compound, Rb2O2·2NH3, has been obtained as a reaction product of rubidium metal dissolved in liquid ammonia and glucuronic acid. As a result of the low-temperature crystallization, a disolvate was formed. To our knowledge, only one other solvate of an alkali metal peroxide is known: Na2O2·8H2O has been reported by Grehl et al. [Acta Cryst. (1995, C51, 1038–1040]. We determined the peroxide bond length to be 1.530 (11 Å, which is in accordance with the length reported by Bremm & Jansen [Z. Anorg. Allg. Chem. (1992, 610, 64–66]. One of the ammonia solvate molecules is disordered relative to a mirror plane, with 0.5 occupancy for the corresponding nitrogen atom.

  3. Potassium tetracyanidoaurate(III monohydrate: a redetermination

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    Nobuyuki Matsushita

    2017-03-01

    Full Text Available The structure of the title metal complex salt, K[Au(CN4]·H2O, has been redetermined using X-ray diffraction data at 173 K in order to improve the precision. The previous determination was based on neutron diffraction data [Bertinotti & Bertinotti (1970. Acta Cryst. B26, 422–428]. The title compound crystallizes in the space group P212121 with one potassium cation, one [Au(CN4]− anion and one water molecule in the asymmetric unit. The AuIII atom lies on a general position and has an almost square-planar coordination sphere defined by four cyanide ligands. Interactions between the potassium cation and N atoms of the complex anion, as well as O—H...N hydrogen bonds, lead to the formation of a three-dimensional framework structure.

  4. Orthorhombic polymorph of 4-[(1H-benzimidazol-1-ylmethyl]benzoic acid

    Directory of Open Access Journals (Sweden)

    Hai-Wei Kuai

    2011-11-01

    Full Text Available We reported recently the first polymorph of the title compound [Kuai & Cheng (2011a. Acta Cryst., E67, o2787]. A second polymorph of the title compound, C15H12N2O2, was unexpectedly obtained by the hydrothermal reaction of the title compound with manganese chloride in the presence of potassium hydroxide at 413 K. The benzimidazole ring system is almost planar, with a maximum deviation from the mean plane of 0.015 (2 Å. The benzimidazole and benzene rings are inclined at a dihedral angle of 79.00 (1°. In the crystal, adjacent molecules are connected through O—H...N hydrogen bonds into a one-dimensional chain along the [001] direction.

  5. 4′,5-Dihydroxy-7-methoxyflavanone dihydrate

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    Iván Brito

    2012-01-01

    Full Text Available The title compound, C16H14O5·2H2O [systematic name: 5-hydroxy-2-(4-hydroxyphenyl-7-methoxychroman-4-one dihydrate], is a natural phytoalexin flavone isolated from the native chilean species Heliotropium taltalense and crystallizes with an organic molecule and two water molecules in the asymmetric unit. The 5-hydroxy group forms a strong intramolecular hydrogen bond with the carbonyl group, resulting in a six-membered ring. In the crystal, the components are linked by O—H...O hydrogen bonds, forming a three-dimensional network. The 4-hydroxyphenyl benzene ring is bonded equatorially to the pyrone ring, which adopts a slightly distorted sofa conformation. The title compound is the hydrated form of a previously reported structure [Shoja (1990. Acta Cryst. C46, 1969–1971]. There are only slight variations in the molecular geometry between the two compounds.

  6. Thermal diffuse scattering in angular-dispersive neutron diffraction

    International Nuclear Information System (INIS)

    Popa, N.C.; Willis, B.T.M.

    1998-01-01

    The theoretical treatment of one-phonon thermal diffuse scattering (TDS) in single-crystal neutron diffraction at fixed incident wavelength is reanalysed in the light of the analysis given by Popa and Willis [Acta Cryst. (1994), (1997)] for the time-of-flight method. Isotropic propagation of sound with different velocities for the longitudinal and transverse modes is assumed. As in time-of-flight diffraction, there exists, for certain scanning variables, a forbidden range in the one-phonon TDS of slower-than-sound neutrons, and this permits the determination of the sound velocity in the crystal. A fast algorithm is given for the TDS correction of neutron diffraction data collected at a fixed wavelength: this algorithm is similar to that reported earlier for the time-of-flight case. (orig.)

  7. 10,21-Dimethyl-2,7,13,18-tetraphenyl-3,6,14,17-tetraazatricyclo[17.3.1.18,12]tetracosa-1(23,2,6,8(24,9,11,13,17,19,21-decaene-23,24-diol cyclohexane 0.33-solvate

    Directory of Open Access Journals (Sweden)

    Sushil K. Gupta

    2011-10-01

    Full Text Available The title compound, C46H40N4O2·0.33C6H12, was obtained unintentionally as a product of an attempted synthesis of a cadmium(II complex of the [2,6-{PhSe(CH22N=CPh}2C6H2(4-Me(OH] ligand. The full tetraiminodiphenol macrocyclic ligand is generated by the application of an inversion centre. The macrocyclic ligand features strong intramolecular O—H...N hydrogen bonds. The dihedral angles formed between the phenyl ring incorporated within the macrocycle and the peripheral phenyl rings are 82.99 (8 and 88.20 (8°. The cyclohexane solvent molecule lies about a site of overline{3} symmetry. Other solvent within the lattice was disordered and was treated with the SQUEEZE routine [Spek (2009. Acta Cryst. D65, 148–155].

  8. Crystal structure of [(E-({2-[3-(2-{(1E-[(carbamothioylaminoimino]methyl}phenoxypropoxy]phenyl}methylideneamino]thiourea with an unknown solvate

    Directory of Open Access Journals (Sweden)

    Joel T. Mague

    2015-07-01

    Full Text Available The title molecule, C19H22N6O2S2, has crystallographically imposed C2 symmetry, with the central C atom lying on the rotation axis. The O—C—C—C torsion angle for the central chain is −59.22 (16° and the dihedral angle between the planes of the benzene rings is 75.20 (7°. In the crystal, N—H...O and N—H...S interactions link the molecules, forming a three-dimensional network encompassing channels running parallel to the c axis, which account for about 20% of the unit-cell volume. The contribution to the scattering from the highly disordered solvent molecules in these channels was removed with the SQUEEZE routine [Spek (2015. Acta Cryst. C71, 9–18] in PLATON. The stated crystal data for Mr, μ etc. do not take these into account.

  9. Trimesic acid dimethyl sulfoxide solvate: space group revision

    Directory of Open Access Journals (Sweden)

    Sylvain Bernès

    2008-07-01

    Full Text Available The structure of the title solvate, C9H6O6·C2H6OS, was determined 30 years ago [Herbstein, Kapon & Wasserman (1978. Acta Cryst. B34, 1613–1617], with data collected at room temperature, and refined in the space group P21. The present redetermination, based on high-resolution diffraction data, shows that the actual space group is more likely to be P21/m. The crystal structure contains layers of trimesic acid molecules lying on mirror planes. A mirror plane also passes through the S and O atoms of the solvent molecule. The molecules in each layer are interconnected through strong O—H...O hydrogen bonds, forming a two-dimensional supramolecular network within each layer. The donor groups are the hydroxyls of the trimesic acid molecules, while the acceptors are the carbonyl or the sulfoxide O atoms.

  10. 2-(5-Iodo-2-oxoindolin-3-ylidenehydrazinecarbothioamide including an unknown solvate

    Directory of Open Access Journals (Sweden)

    Viviane Conceição Duarte de Bittencourt

    2014-06-01

    Full Text Available The molecule of the title compound, C9H7IN4OS, is almost planar (r.m.s. deviation = 0.0373 Å. In the molecule, N—H...N and N—H...O hydrogen bonds generate, respectively, S(5 and S(6 ring motifs. In the crystal, molecules are linked via N—H...O hydrogen bonds, forming chains propagating along [010]. These chains are linked via S...I contacts [3.4915 (16 Å], forming sheets lying parallel to (100. A region of disordered electron density, probably a disordered tetrahydrofuran solvent molecule, was treated using the SQUEEZE routine in PLATON [Spek (2009. Acta Cryst. D65, 148–155]. The formula mass and unit-cell characteristics were not taken into account during refinement.

  11. 5′′-(4-Nitrobenzylidene-7′-(4-nitrophenyl-1′′-methyl-1′,3′,5′,6′,7′,7a′-hexahydrodispiro[acenaphthylene-1,5′-pyrrolo[1,2-c][1,3]thiazole-6′,3′′-piperidine]-2,4′′(1H-dione including an unknown solvate

    Directory of Open Access Journals (Sweden)

    P. L. Nilantha Lakshman

    2013-08-01

    Full Text Available The title compound, C35H28N4O6S, crystallizes with two molecules in the asymmetric unit. In both molecules, the piperidine ring adopts a shallow-chair conformation, the thiazole ring adopts a twisted conformation about the Cm—N bond (m = methine and the pyrrole ring adopts an envelope conformation with the C atom shared with the thiazole ring as the flap. In the crystal, inversion dimers linked by pairs of C—H...O interactions generate R22(34 loops for one of the asymmetric molecules. Further C—H...O links also involving the other molecule lead to a three-dimesional network. The contribution of the highly disordered solvent to the scattering was removed with SQUEEZE option of PLATON [Spek (2009. Acta Cryst. D65, 148–155]. The solvent contribution is not included in the reported molecular weight and density.

  12. 1-Decyl-6-nitro-1H-benzimidazol-2(3H-one

    Directory of Open Access Journals (Sweden)

    Younes Ouzidan

    2011-11-01

    Full Text Available The title molecule, C17H25N3O3, is built up from fused six- and five-membered rings linked to a –C10H21 chain. The fused-ring system is essentially planar, the largest deviation from the mean plane being 0.009 (2 Å. The chain is roughly perpendicular to this plane, making a dihedral angle of 79.5 (2°. In the crystal, N—H...O hydrogen bonds build infinite chains along [010]. There are channels in the structure containing disordered hexane. The contribution of this solvent to the scattering power was suppressed using the SQUEEZE option in PLATON [Spek (2009. Acta Cryst. D65, 148–155].

  13. 2-(2-Chlorophenyl-N-cyclohexyl-2-oxoacetamide

    Directory of Open Access Journals (Sweden)

    Xiu-Dan Jin

    2013-04-01

    Full Text Available In the title compound, C14H16ClNO2, the cyclohexyl ring has a chair conformation. The dihedral angle between the benzene ring and the mean plane of the four planar C atoms of the cyclohexyl ring is 45.2 (3°. The two carbonyl groups are trans to one another, with an O=C—C=O torsion angle of −137.1 (3°. In the crystal, molecules are linked by N—H...O hydrogen bonds forming chains propagating along [001]. A region of disordered electron density, situated near the unit-cell corners, was treated using the SQUEEZE routine in PLATON [Spek (2009. Acta Cryst. D65, 148–155]. It gave a solvent-accessible void of ca 400 Å3 for only 21 electrons. It is probably due to traces of the solvent of crystallization and was not taken into account during structure refinement.

  14. 3,10,14,21-Tetrakis(4-methoxyphenylpentacyclo[11.8.0.02,11.04,9.015,20]henicosa-1(21,2,4(9,5,7,10,13,15(20,16,18-decaen-12-one chloroform monosolvate

    Directory of Open Access Journals (Sweden)

    S. Gopinath

    2014-08-01

    Full Text Available The asymmetric unit of the title compound, C49H36O6·CHCl3, contains half an organic molecule, the complete molecule being generated by the operation of a crystallographic twofold rotation axis, and half a highly disordered chloroform molecule. The contribution to the diffraction pattern of the latter was removed using the program SQUEEZE in PLATON [Spek (2009. Acta Cryst. D65, 148–155]; the unit-cell characteristics take into account the presence of CHCl3. The dihedral angles between the planes of the naphthalene ring system and the methoxybenzene rings are 71.05 (7 (syn to the central C=O group and 57.27 (6° (anti to the central C=O group. In the crystal, molecules are linked by C—H...O interactions, generating C(12 chains running parallel to the b axis.

  15. 1,3,5-Tri-p-tolylpentane-1,5-diol

    Directory of Open Access Journals (Sweden)

    A. Thiruvalluvar

    2014-02-01

    Full Text Available In the title compound, C26H30O2, the central benzene ring forms dihedral angles of 14.85 (15 and 28.17 (14° with the terminal benzene rings. The dihedral angle between the terminal benzene rings is 32.14 (13°. The crystal packing exhibits two strong intermolecular O—H...O hydrogen bonds, forming directed four-membered co-operative rings. A region of disordered electron density, most probably disordered ethyl acetate solvent molecules, occupying voids of ca 519 Å3 for an electron count of 59, was treated using the SQUEEZE routine in PLATON [Spek (2009. Acta Cryst. D65, 148–155]. Their formula mass and unit-cell characteristics were not taken into account during refinement. The structure was refined as an inversion twin [absolute structure parameter = −0.3 (4].

  16. Influence of Nd dopants on lattice parameters and thermal and elastic properties in YVO4 single crystals

    International Nuclear Information System (INIS)

    Kucytowski, J.; Wokulska, K.; Kazmierczak-Balata, A.; Bodzenta, J.; Lukasiewicz, T.; Hofman, B.; Pyka, M.

    2008-01-01

    The influence of neodymium doping on YVO 4 single crystals has been studied. The crystals were grown by the Czochralski method. One of them was pure YVO 4 and the others were doped with neodymium (YVO 4 :Nd) at various concentrations of Nd = 0.3-3.0 at.%. The changes of the lattice parameters were determined by the Bond's method [W.L. Bond, Acta Cryst. 13 (1960) 814]. The thermal diffusivity and the velocity of ultrasound using the photothermal method with mirage effect and the pulse echo method [J. Bodzenta, M. Pyka, J. Phys. IV France 137 (2006) 259] were measured. In the examined crystals, it was found that the lattice parameters increase while the thermal diffusivity decreases with increasing concentration of Nd atoms

  17. Redetermination of the borax structure from laboratory X-ray data at 145 K.

    Science.gov (United States)

    Gainsford, Graeme J; Kemmitt, Tim; Higham, Caleb

    2008-04-23

    THE TITLE COMPOUND, SODIUM TETRABORATE DECAHYDRATE (MINERAL NAME: borax), Na(2)[B(4)O(5)(OH)(4)]·8H(2)O, has been studied previously using X-ray [Morimoto (1956). Miner. J.2, 1-18] and neutron [Levy & Lisensky (1978). Acta Cryst. B34, 3502-3510] diffraction data. The structure contains tetra-borate anions [B(4)O(5)(OH)(4)](2-) with twofold rotation symmetry, which form hydrogen-bonded chains, and [Na(H(2)O)(6)] octa-hedra that form zigzag chains [Na(H(2)O)(4/2)(H(2)O)(2/1)]. The O-H bond distances obtained from the present redetermination at 145 K are shorter than those in the neutron study by an average of 0.127 (19) Å.

  18. Redetermination of the borax structure from laboratory X-ray data at 145 K

    Directory of Open Access Journals (Sweden)

    Caleb Higham

    2008-05-01

    Full Text Available The title compound, sodium tetraborate decahydrate (mineral name: borax, Na2[B4O5(OH4]·8H2O, has been studied previously using X-ray [Morimoto (1956. Miner. J. 2, 1–18] and neutron [Levy & Lisensky (1978. Acta Cryst. B34, 3502–3510] diffraction data. The structure contains tetraborate anions [B4O5(OH4]2− with twofold rotation symmetry, which form hydrogen-bonded chains, and [Na(H2O6] octahedra that form zigzag chains [Na(H2O4/2(H2O2/1]. The O—H bond distances obtained from the present redetermination at 145 K are shorter than those in the neutron study by an average of 0.127 (19 Å.

  19. ShelXle: a Qt graphical user interface for SHELXL.

    Science.gov (United States)

    Hübschle, Christian B; Sheldrick, George M; Dittrich, Birger

    2011-12-01

    ShelXle is a graphical user interface for SHELXL [Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122], currently the most widely used program for small-molecule structure refinement. It combines an editor with syntax highlighting for the SHELXL-associated .ins (input) and .res (output) files with an interactive graphical display for visualization of a three-dimensional structure including the electron density (F(o)) and difference density (F(o)-F(c)) maps. Special features of ShelXle include intuitive atom (re-)naming, a strongly coupled editor, structure visualization in various mono and stereo modes, and a novel way of displaying disorder extending over special positions. ShelXle is completely compatible with all features of SHELXL and is written entirely in C++ using the Qt4 and FFTW libraries. It is available at no cost for Windows, Linux and Mac-OS X and as source code.

  20. Diosgenin hemihydrate

    Directory of Open Access Journals (Sweden)

    María-Guadalupe Hernández Linares

    2012-08-01

    Full Text Available Diosgenin [or (22R,25R-spirost-5-en-3β-ol] is the starting material of the Marker degradation, a cheap semi-synthesis of progesterone, which has been designated as an International Historic Chemical Landmark. Thus far, a single X-ray structure for diosgenin is known, namely its dimethyl sulfoxide solvate [Zhang et al. (2005. Acta Cryst. E61, o2324–o2325]. We have now determined the structure of the hemihydrate, C27H42O3·0.5H2O. The asymmetric unit contains two diosgenin molecules, with quite similar conformations, and one water molecule. Hydroxy groups in steroids and water molecules form O—H...O hydrogen-bonded R54(10 ring motifs. Fused edge-sharing R(10 rings form a backbone oriented along [100], which aggregates the diosgenin molecules in the crystal structure.

  1. (η2,η2-Cycloocta-1,5-diene[2-(diphenylphosphanylmethylpyridine-κ2N,P]rhodium(I tetrafluoridoborate 1,2-dichloroethane monosolvate

    Directory of Open Access Journals (Sweden)

    Siping Wei

    2016-08-01

    Full Text Available The title compound, [Rh(C8H12(C18H16NP]BF4 has been prepared as a precatalyst for applications in rhodium-catalysed additions of carbocyclic acids to terminal alkynes leading to anti-Markovnikov Z-enol esters. Here the triclinic pseudopolymorph of the title compound is presented. In contrast to the earlier reported pseudopolymorph (orthorhombic space group [Wei et al. (2013. Chem. Eur. J. 19, 12067–12076], the triclinic polymorph contains half a molecule of dichloromethane as solvent in the asymmetric unit. The rhodium(I atom exhibits a square-planar coordination. The estimated diffraction contribution of the disordered solvent (a half molecule of dichloroethane per asymmetric unit was subtracted from the observed diffraction data using the SQUEEZE [Spek (2015. Acta Cryst. C71, 9–16] routine in PLATON. The given chemical formula and other crystal data do not take the solvent into account.

  2. Carbonyl{3,3′-di-tert-butyl-5,5′-dimethoxy-2,2′-bis[(4,4,5,5-tetramethyl-1,3,2-dioxaphospholan-2-yloxy]biphenyl-κ2P,P′}hydrido(triphenylphosphane-κPrhodium(I diethyl ether trisolvate

    Directory of Open Access Journals (Sweden)

    Detlef Selent

    2013-01-01

    Full Text Available In the title compound, [RhH(C74H68O8P2(C18H15P(CO]·3C4H10O, the CHP3 coordination set at the RhI ion is arranged in a distorted trigonal–bipyramidal geometry with the P atoms adopting equatorial coordination sites and the C atom of the carbonyl ligand as well as the H atom adopting the axial sites. The asymmetric unit contains two very similar molecules of the rhodium complex, two half-occupied diethyl ether molecules and further diethyl ether solvent molecules which could not be modelled successfully. Therefore contributions of the latter were removed from the diffraction data using the SQUEEZE procedure in PLATON [Spek (2009. Acta Cryst. D65, 148–155].

  3. A second monoclinic polymorph of 2-(3,5-dimethyl-1H-pyrazol-1-yl)-2-hy­droxy­imino-N′-[1-(pyridin-2-yl)ethyl­idene]acetohydrazide

    Science.gov (United States)

    Plutenko, Maxym O.; Lampeka, Rostislav D.; Haukka, Matti; Nordlander, Ebbe

    2013-01-01

    The title compound, C14H16N6O2, is a second monoclinic polymorph of 2-[1-(3,5-dimeth­yl)pyrazol­yl]-2-hy­droxy­imino-N′-[1-(2-pyrid­yl)ethyl­idene] acetohydrazide, with two crystallographically independent mol­ecules per asymmetric unit. The non-planar mol­ecules are chemically equal having similar geometric parameters. The previously reported polymorph [Plutenko et al. (2012 ▶). Acta Cryst. E68, o3281] was described in space group Cc (Z = 4). The oxime group and the O atom of the amide group are anti with respect to the C—C bond. In the crystal, mol­ecules are connected by N—H⋯N hydrogen bonds into zigzag chains extending along the b axis. PMID:23723911

  4. Acta Medica Indonesiana - The Indonesian Journal of Internal Medicine 333 Supraclavicular Lymphnodes: Unusual Manifestation of Metastase Adenocarcinoma Colon

    Directory of Open Access Journals (Sweden)

    Harijono Achmad

    2015-12-01

    Full Text Available We report a patient with supraclavicular lymph node metastasis from an undetectable adenocarcinoma of the transverse colon, who presented with cough and was diagnosed with typhoid fever, bronchitis as well as liver metastasis. There were an abdominal fullness, weight loss, constipation, pencil-like stool with mucous and blood, low-grade fever, bone ache, and tea-color urine. The first colonoscopy revealed lymphocytic ileitis and microscopic findings also showed lymphocytic ileitis. Abdominal USG and CT revealed liver metastasis of unknown origin. Based on the clinical sign and symptoms, we suspected that colorectal carcinoma was the primary site. Then, the second colonoscopy was performed and it revealed a small polyp, which was followed with a biopsy and the result supported a well-differentiated colon adenocarcinoma. Similar result was also revealed by the histopathological evaluation. This is an unusual case of liver and supraclavicular lymph node metastasis arising from a small polyp adenocacinoma of the transverse colon. Key words: liver metastase, colorectal carcinoma, lymph node.

  5. ACTA DE CONSTITUCIÓN DE LA RED MESOAMERICANA DE INVESTIGACION EN SEGURIDAD ALIMENTARIA Y NUTRICIONAL (REISAN)

    OpenAIRE

    Delgado, Hernán

    2015-01-01

    Reunidos en la Sede de la Escuela de Nutrición de la Universidad de Costa Rica, el Instituto deNutrición de Centroamérica y Panamá INCAP/OPS con sede en Guatemala y representada por suDirector Dr. Hernán Delgado, y la Vicerrectoría de Investigación de la Universidad de Costa Rica,representada por el Dr. Henning Jensen Pennington, en calidad de entidades fundadoras de la Redde Investigación en Seguridad Alimentaria

  6. Proceedings of the Fourth Session of Radioprotection of the patient; Actas de la 4. Jornada de Proteccion Radiologica al Paciente

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2009-07-01

    The Radiology Argentine Society and the Radioprotection Argentine Society have organized the 4. Session of the Protection to the Patient, in order to inform to the technical and scientific community about the scopes of the radioprotection to the patient. The principal treated topics were the following: effects of the radiation in radiodiagnostic; radioprotection of the fetus and the pregnancy woman; radioprotection in dental radiology; radiological protection in TAC; radiation doses in radiodiagnostic; treatment of radiation injuries; fatal accidents in radiotherapy. [Spanish] La Sociedad Argentina de Radiologia, y la Sociedad Argentina de Radioproteccion, han organizado la 4ta. Jornada de Proteccion al Paciente, con el objeto de informar a la comunidad cientifico y tecnica sobre los alcances de la radioproteccion al paciente. Los principales temas tratados fueron los siguientes: efectos de la radiacion en radiodiagnostico; radioproteccion del feto y la mujer gestante; radioproteccion en radiologia odontologica; proteccion radioogica en TAC; dosis de radiacion en radiodiagnostico; tratamiento de lesiones por radiacion; accidentes fatales en radioterapia.

  7. Fenomenologia e Ciência. Actas do IVº Congresso Internacional da AFFEN – IIIº Congresso Luso-Brasileiro de Fenomenologia

    OpenAIRE

    Borges-Duarte, Irene; Pardelha, Irene

    2014-01-01

    Este volume reune os textos apresentados ao IVº Congresso Internacional da AFFEN – IIIº Congresso Luso-Brasileiro de Fenomenologia, em 5 secções: Ciência, Técnica, Psicoterapia fenomenológica, Questões da Fenomenologia Husserliana e Outras fenomenologias. Tendo como temática unificadora «Fenomenologia e Ciência», integram-se trabalhos sobre aplicação da metodologia fenomenológica e hermenêutica às questões da ciência e da técnica, e a âmbitos científicos particulares como a Psicologia, a Soci...

  8. Proceedings CORENDE: Regional congress on nondestructive and structural evaluation; Actas CORENDE: Congreso regional de ensayos no destructivos y estructurales

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-12-31

    Works are presented at the CORENDE: Regional Congress on Nondestructive and Structural Evaluation organized by the National Atomic Energy Commission and the National Technological University (Mendoza). This congress wants to be the forum where people from research, industry and marketing might meet and discuss ideas towards the fostering of these new cultural habits. Papers covering all disciplines contributing to the evaluation of components, systems and structures are welcome: nondestructive evaluation methods and techniques (ultrasound, eddy currents and other electromagnetic methods, acoustic emission, radiography, thermography, leak testing, dye-penetrants, visual inspection, etc.), personnel certification, welding inspection, nondestructive metallography, optics and lasers, fluid-structure interaction, vibrations, extensometry, modelling of structures refs., ills. [Espanol] Se presentan trabajos de CORENDE: Congreso Regional de Ensayos no Destructivos y Estructurales organizado por la Comision Nacional de Energia Atomica y la Universidad Tecnologica Nacional (Mendoza). Este congreso se propone como un foro de discusion, donde, desde la investigacion hasta la produccion y comercializacion, se intercambien y discutan ideas que sirvan de guia para fomentar ese necesario cambio cultural. Los topicos de discusion incluyen a todas las disciplinas presentes en la evaluacion de componentes, sistemas y estructuras: tecnicas no destructivas (ultrasonido, corrientes inducidas, radiografia industrial, emision acustica, particulas magnetizables, termografia, liquidos penetrantes, ensayos de perdidas, inspeccion visual, etc.), certificacion de personal, inspeccion en soldaduras, replicas metalograficas, tecnicas opticas y laser, interaccion fluido-estructura, vibraciones, extensometria, modelado de estructuras

  9. TABLE OF CINTENTS and ABSTRACTS reprinted from ACTA PHYSICA SINICA,Vol.50,No.6(2001)(in Chinese)

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    @@0000 GENERAL 0330 Conservation Laws of Relativistic Variable Mass Systems…………………………… Fang Jian-hui (1005) 0340 Simulation of Shock Waves Using a Lattice Boltz mann Equation Model …………………… Feng Shi-de, Michihisa Tsutahara (1010) 0365 Double-Wave Function of RLC Circuit After Quantization…………………… Long Chao-yun, Liu Bo (1014) 0420 The Nernst Theorem and Statistical Entropy of the Scalar field in Reissner-Nordstrom Geometry……………………Zhao Ren, Zhang Li-chun (1018)

  10. Minutes of the third mining symposium, Mieres (1988). Actas de las 3. Jornadas de Mineria, Mieres (1988)

    Energy Technology Data Exchange (ETDEWEB)

    Llaneza, L.J. (Comite Ejecutivo de la Feria de Mieres (Spain))

    1989-01-01

    The mining symposium was held in Mieres, Asturias, Spain sessions took place on: coal and its future - including technological research and development in Spain - the coordinating role of Ocicarbon, and principals pursued by HUNOSA in its opencast restoration work. Results obtained and coal and the EEC - including coal in the short and medium term, and Spanish mining within the European context.

  11. Comment on ;First experimental determination of the solubility constant of coffinite; [Geochim. Cosmochim. Acta 181 (2016) 36-53

    Science.gov (United States)

    Konings, R. J. M.; Plyasunov, A.

    2017-09-01

    Coffinite - USiO4 - is a key mineral for the modelling of the chemistry of uranium in silica-rich rocks. It is of particular interest for the modelling of the final storage of used nuclear fuel in deep geological respositories, as coffinite may be the solubility-controlling solid phase for uranium. This was extensively discussed by Szenknect et al. (2016) in a recent publication of the determination of the solubility constant of coffinite. The availability of pure USiO4 samples made it possible for the first time to accurately determine the solubility of this phase in aqueous solution (under-saturated conditions with respect to silica in 0.1 mol L-1 HCl). The study by Szenknect et al. (2016) is very extensive and in combination with the calorimetric determination of the enthalpy of formation of USiO4 from the same material batch (Guo et al., 2015), allows a re-assessment of the thermodynamic properties of this phase, revising the values from the OECD/NEA review in 1992 (Grenthe et al., 1992) that were based on estimated values for the Gibbs energy of formation of USiO4 by Brookins (1975) and the standard entropy by Langmuir (1978).

  12. Erratum to "On guided wave propagation in fully clamped porous functionally graded nanoplates" [Acta Astronaut. 143 (2018) 380-390

    Science.gov (United States)

    Karami, Behrouz; Janghorban, Maziar; Li, Li

    2018-03-01

    We found a proofing error existing in the affiliation of the first and second authors of our article [1], We found a proofing error existing in the affiliation of the first and second authors of our article [1]. The correct affiliation should be "Department of Mechanical Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran".

  13. Poly[μ2-chlorido-nonamethyl-μ3-nitrato-tritin(IV]. Corrigendum

    Directory of Open Access Journals (Sweden)

    Madeleine Helliwell

    2008-07-01

    Full Text Available An error in the original formulation of the title compound in the paper by Sadiq-ur-Rehman, Sherzaman, Ali, Shahzadi & Helliwell [Acta Cryst. (2007, E63, m2329] is corrected.The title compound in the paper by Sadiq-ur-Rehman, Sherzaman, Ali, Shahzadi & Helliwell [Acta Cryst. (2007, E63, m2329] was an unexpected product which seemed to have nitrate coordinated to three Sn atoms. However, it was noticed that the charges do not balance and that it is most likely that the nitrate is in fact a carbonate. Regrettably, there is no material to carry out microanalysis, but a plausible mechanism has been suggested to explain the unexpected formation of the product. Trimethyltin chloride will react with methanol in the presence of a base (4-hydroxypiperidine to give trimethyltin methoxide, which will rapidly hydrolyze in air to give the hydroxide. Both the methoxide and the hydroxide will react with atmospheric CO2 to give the carbonate (Bloodworth et al., 1967; Blunden et al., 1984; Sato, 1967. Me3SnCl + MeOH + base → Me3SnOMe + base·HCl Me3SnOMe + H2O → Me3SnOH + MeOH Me3SnOH + CO2 → Me3SnOCO2HMe3SnOCO2H + Me3SnOMe → Me3SnOCO2SnMe3 + MeOH. The carbonate then forms a coordination copolymer with trimethyltin chloride. The name of the title compound is corrected to poly[μ3-carbonato-μ3-chlorido-nonamethyltritin(IV], [Sn3(CH39(CO3Cl] (Mr = 586.84.

  14. Apocrustacyanin C(1) crystals grown in space and on earth using vapour-diffusion geometry: protein structure refinements and electron-density map comparisons.

    Science.gov (United States)

    Habash, Jarjis; Boggon, Titus J; Raftery, James; Chayen, Naomi E; Zagalsky, Peter F; Helliwell, John R

    2003-07-01

    Models of apocrustacyanin C(1) were refined against X-ray data recorded on Bending Magnet 14 at the ESRF to resolutions of 1.85 and 2 A from a space-grown and an earth-grown crystal, respectively, both using vapour-diffusion crystal-growth geometry. The space crystals were grown in the APCF on the NASA Space Shuttle. The microgravity crystal growth showed a cyclic nature attributed to Marangoni convection, thus reducing the benefits of the microgravity environment, as reported previously [Chayen et al. (1996), Q. Rev. Biophys. 29, 227-278]. A subsequent mosaicity evaluation, also reported previously, showed only a partial improvement in the space-grown crystals over the earth-grown crystals [Snell et al. (1997), Acta Cryst. D53, 231-239], contrary to the case for lysozyme crystals grown in space with liquid-liquid diffusion, i.e. without any major motion during growth [Snell et al. (1995), Acta Cryst. D52, 1099-1102]. In this paper, apocrustacyanin C(1) electron-density maps from the two refined models are now compared. It is concluded that the electron-density maps of the protein and the bound waters are found to be better overall for the structures of apocrustacyanin C(1) studied from the space-grown crystal compared with those from the earth-grown crystal, even though both crystals were grown using vapour-diffusion crystal-growth geometry. The improved residues are on the surface of the protein, with two involved in or nearby crystal lattice-forming interactions, thus linking an improved crystal-growth mechanism to the molecular level. The structural comparison procedures developed should themselves be valuable for evaluating crystal-growth procedures in the future.

  15. Symmetry of semi-reduced lattices.

    Science.gov (United States)

    Stróż, Kazimierz

    2015-05-01

    The main result of this work is extension of the famous characterization of Bravais lattices according to their metrical, algebraic and geometric properties onto a wide class of primitive lattices (including Buerger-reduced, nearly Buerger-reduced and a substantial part of Delaunay-reduced) related to low-restricted semi-reduced descriptions (s.r.d.'s). While the `geometric' operations in Bravais lattices map the basis vectors into themselves, the `arithmetic' operators in s.r.d. transform the basis vectors into cell vectors (basis vectors, face or space diagonals) and are represented by matrices from the set {\\bb V} of all 960 matrices with the determinant ±1 and elements {0, ±1} of the matrix powers. A lattice is in s.r.d. if the moduli of off-diagonal elements in both the metric tensors M and M(-1) are smaller than corresponding diagonal elements sharing the same column or row. Such lattices are split into 379 s.r.d. types relative to the arithmetic holohedries. Metrical criteria for each type do not need to be explicitly given but may be modelled as linear derivatives {\\bb M}(p,q,r), where {\\bb M} denotes the set of 39 highest-symmetry metric tensors, and p,q,r describe changes of appropriate interplanar distances. A sole filtering of {\\bb V} according to an experimental s.r.d. metric and subsequent geometric interpretation of the filtered matrices lead to mathematically stable and rich information on the Bravais-lattice symmetry and deviations from the exact symmetry. The emphasis on the crystallographic features of lattices was obtained by shifting the focus (i) from analysis of a lattice metric to analysis of symmetry matrices [Himes & Mighell (1987). Acta Cryst. A43, 375-384], (ii) from the isometric approach and invariant subspaces to the orthogonality concept {some ideas in Le Page [J. Appl. Cryst. (1982), 15, 255-259]} and splitting indices [Stróż (2011). Acta Cryst. A67, 421-429] and (iii) from fixed cell transformations to transformations

  16. HPLC-MS Analysis of Lichen-Derived Metabolites in the Life Stages of Crambidia cephalica (Grote & Robinson).

    Science.gov (United States)

    Anderson, Timothy J; Wagner, David L; Cooper, Bruce R; McCarty, Megan E; Zaspel, Jennifer M

    2017-01-01

    Tiger moths (Lepidoptera: Erebidae: Arctiinae: Arctiini) are notable for their specialized associations with hosts that produce toxic secondary compounds, and are thus an ideal study system for understanding insect-plant interactions and the evolution of antipredatory defense. Likewise, their sister lineage (Arctiinae: Lithosiini) has been documented feeding on algae and lichens, and is known to sequester lichen-derived secondary compounds from the larval to adult stages. Prevalence of lichenivory in this early radiation (ca. 3000 species) may provide clues to the phylogenetic basis for storied chemical sequestration within all tiger moths. Despite the evolutionary significance of this trait, we lack a basic understanding of the extent of lichenivory among lithosiines, and the distribution of sequestered chemicals among life stages. The dynamics of chemical sequestration throughout the lifecycle for the lichen moth Crambidia cephalica were investigated by testing the hypothesis that lichen-derived metabolites are unequally distributed among life stages, and that laboratory-reared C. cephalica have less metabolite diversity than wild-caught individuals. Crambidia cephalica was reared on Physcia, and analyzed using high-performance liquid chromatography coupled to mass spectrometry (HPLC-MS). Several putative lichen-derived metabolites were detected across three life stages, i.e., larval, pupal, and adult, and differences among life stages and lichen host were observed. These results provide evidence that multiple lichen-derived metabolites are sequestered by C. cephalica; some metabolites are retained through adulthood, and others are lost or modified in earlier life stages. The presence of differing lichen-derived metabolites across life stages may indicate functional properties of the metabolites for C. cephalica with regards to chemical protection from antagonists, and other physiological processes.

  17. 76 FR 54261 - Carolina Power & Light; H.B. Robinson Steam Electric Plant, Unit No. 2; HBRSEP Independent Spent...

    Science.gov (United States)

    2011-08-31

    ... via electronic submission through the NRC E-Filing system. Requests for a hearing and petitions for... entities participating under 10 CFR 2.315(c), must be filed in accordance with the NRC E-Filing rule (72 FR 49139, August 28, 2007). The E-Filing process requires participants to submit and serve all adjudicatory...

  18. Tõlkimise kõrge kunsti kirjelduskeele otsingud jätkuvad: Tallinnas käis Douglas Robinson / Anne Lange

    Index Scriptorium Estoniae

    Lange, Anne, 1962-

    2013-01-01

    Tõlketeadusest ja tõlketeadlasest Douglas Robinsonist. Sisaldab intervjuud Douglas Robinsoniga, kes pidas Tallinna Ülikooli kultuuriteaduste ja kunstide doktorikooli seminari raames avaliku loengu tõlkimisest

  19. The fate of Mrs Robinson: Criteria for recognition of whole-body vibration injury as an occupational disease

    NARCIS (Netherlands)

    Hulshof, C. T. J.; van der Laan, G.; Braam, I. T. J.; Verbeek, J. H. A. M.

    2002-01-01

    Several recently published critical reviews conclude that there is strong epidemiological evidence for a relationship between occupational exposure to whole-body vibration (WBV), low back pain (LBP) and back disorders. Whether this exposure is only a modest or a substantial risk factor for the onset

  20. 75 FR 80545 - Carolina Power & Light Company; H.B. Robinson Steam Electric Plant, Unit No. 2; Environmental...

    Science.gov (United States)

    2010-12-22

    ... workers and members of the public. Therefore, no changes or different types of radiological impacts are... historical and cultural resources. There would be no impact to socioeconomic resources. Therefore, no changes...

  1. 75 FR 8410 - Carolina Power & Light Company: H. B. Robinson Steam Electric Plant, Unit No. 2; Environmental...

    Science.gov (United States)

    2010-02-24

    ... workers and members of the public. Therefore, no changes or different types of radiological impacts are... historical and cultural resources. There would be no impact to socioeconomic resources. Therefore, no changes...

  2. A Componentwise Convex Splitting Scheme for Diffuse Interface Models with Van der Waals and Peng--Robinson Equations of State

    KAUST Repository

    Fan, Xiaolin; Kou, Jisheng; Qiao, Zhonghua; Sun, Shuyu

    2017-01-01

    are applied to a functional minimization problem of the total Helmholtz free energy. Mass conservation constraints are enforced through Lagrange multipliers. A system of chemical equilibrium equations is obtained which is a set of second-order elliptic

  3. Cannabidiol revisited

    Directory of Open Access Journals (Sweden)

    Tobias Mayr

    2017-02-01

    Full Text Available The crystal structure of cannabidiol, C21H30O2, {systematic name: 2-[(1R,6R-3-methyl-6-(prop-1-en-2-ylcyclohex-2-enyl]-5-pentylbenzene-1,3-diol}, was determined earlier by Jones et al. [(1977. Acta Cryst. B33, 3211–3214] and Ottersen & Rosenqvist [(1977. Acta Chem. Scand. B31, 749–755]. In both investigations, the absolute configuration is given as R,R, referring to Mechoulam et al. [(1967.J. Am. Chem. Soc. 89, 4552–4554]. In the latter, the absolute configuration was identified by chemical means. Using the advantages of modern single-crystal X-ray diffractometers such as area detectors and high-intensity radiation sources, a high-quality structure determination including the absolute configuration was possible and is shown in this work. Furthermore, the rather uncommon Cu Kβ wavelength radiation was applied for the structure determination, which confirmed the absolute structure to be R,R.

  4. Assessment of radiation damage behaviour in a large collection of empirically optimized datasets highlights the importance of unmeasured complicating effects

    International Nuclear Information System (INIS)

    Krojer, Tobias; Delft, Frank von

    2011-01-01

    A retrospective analysis of radiation damage behaviour in a statistically significant number of real-life datasets is presented, in order to gauge the importance of the complications not yet measured or rigorously evaluated in current experiments, and the challenges that remain before radiation damage can be considered a problem solved in practice. The radiation damage behaviour in 43 datasets of 34 different proteins collected over a year was examined, in order to gauge the reliability of decay metrics in practical situations, and to assess how these datasets, optimized only empirically for decay, would have benefited from the precise and automatic prediction of decay now possible with the programs RADDOSE [Murray, Garman & Ravelli (2004 ▶). J. Appl. Cryst.37, 513–522] and BEST [Bourenkov & Popov (2010 ▶). Acta Cryst. D66, 409–419]. The results indicate that in routine practice the diffraction experiment is not yet characterized well enough to support such precise predictions, as these depend fundamentally on three interrelated variables which cannot yet be determined robustly and practically: the flux density distribution of the beam; the exact crystal volume; the sensitivity of the crystal to dose. The former two are not satisfactorily approximated from typical beamline information such as nominal beam size and transmission, or two-dimensional images of the beam and crystal; the discrepancies are particularly marked when using microfocus beams (<20 µm). Empirically monitoring decay with the dataset scaling B factor (Bourenkov & Popov, 2010 ▶) appears more robust but is complicated by anisotropic and/or low-resolution diffraction. These observations serve to delineate the challenges, scientific and logistic, that remain to be addressed if tools for managing radiation damage in practical data collection are to be conveniently robust enough to be useful in real time

  5. Reply to comment by Konings and Plyasunov on ;First experimental determination of the solubility constant of coffinite; [Geochim. Cosmochim. Acta 181 (2016) 36-53

    Science.gov (United States)

    Szenknect, S.; Dacheux, N.; Ewing, R. C.; Navrotsky, A.

    2017-09-01

    R.J.M. Konings and A. Plyasunov investigated the values of thermodynamic data determined by Szenknect et al. (2016) from solubility experiments performed using a synthetic sample of coffinite. Especially, they focused on the value of the standard molar entropy, which was derived from these solubility data and the calorimetric measurement of the standard molar enthalpy of formation of coffinite published by Guo et al. (2015). The two independent measurements were performed on the same synthetic sample prepared by Mesbah et al. (2015) and fully characterized using complementary techniques by the two teams. We thank Konings and Plyasunov for their comment and the relevant analysis of previously published work. As they concluded, we agree that new experimental data are required to solve the ;coffinite issue;. Here, we simply wish to clarify a few points regarding the questions arising from their analysis.

  6. Actas del III Encuentro Platense de Investigadores/as sobre Cuerpo en las Artes Escénicas y Performáticas

    OpenAIRE

    Sáez, Mariana Lucía

    2016-01-01

    Los días 4, 5 y 6 de septiembre de 2013, en el Centro Cultural Islas Malvinas de la ciudad de La Plata, se desarrolló el III ECART, Encuentro Platense de Investigadores sobre Cuerpo en las Artes Escénicas y Performáticas, organizado por el Grupo de Estudio sobre Cuerpo-Centro Interdisciplinario Cuerpo, Educación y Sociedad y la Compañía Proyecto en Bruto. En el transcurso de las tres jornadas de este nuevo encuentro se sucedieron talleres, conferencias, mesas de ponencias, obras de danza y...

  7. Personas y comunidades: Actas del Segundo Congreso Internacional de Buenas Prácticas en Patrimonio Mundial: (29 -30 de abril, 1 y 2 de mayo de 2015)

    OpenAIRE

    Castillo Mena, Alicia R. (ed.)

    2015-01-01

    Este volumen está compuesto por una introducción y los textos de las comunicaciones y pósteres del congreso internacional, con una participación de 30 países y casi 100 centros de investigación. Recoge un documento de Buenas Prácticas sobre el tema.

  8. Simposio sobre Educacion de Ninas: Evidencias, Temas, Acciones. Actas de sesiones. (Symposium on Girls Education: Evidence, Issues, Actions. Proceedings). (Washington, DC, May 17-18, 2000).

    Science.gov (United States)

    Agency for International Development (IDCA), Washington, DC.

    This symposium highlighted core issues of controversy in girls' education and developed implications for policy and practice. Its evidence-based discussion forum encouraged dialogue, debate, and increased interaction and developed partnerships among academic institutions, nongovernmental organizations, multilateral development agencies, and other…

  9. Proceedings of the 6. Argentine congress on radiation protection and nuclear safety; Actas del 6. congreso argentino de proteccion radiologica y seguridad nuclear

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-12-31

    The 6th Argentine Congress on Radiation Protection and Nuclear Safety was organized by the Radioprotection Argentine Society, in Buenos Aires, between the 22 and 24 of september of 1998. In this event, were presented almost 66 papers in the following sessions, about these subjects: 1.- Safety in nuclear installations. 2.- Control of nuclear material and physical protection of nuclear installations. 3.- Programs of quality assurance. 4.- Training, technical information and public information. 5.- Physical dosimetry. 6.- Physical dosimetry and occupational radiation protection. 7.- Exposure of the natural radiation. 8.- Environmental radiological safety. 9.- Biological effects of the ionizing radiations and biological dosimetry. 10.- Radiological protection of the medical practice and the radiological emergencies. 11.- Radioactive wastes management. 12.- Transport of radioactive materials

  10. Tetrodotoxin-induced conduction blockade is prolonged by hyaluronic acid with and without bupivacaine [Corrected from: Acta Anaesthesiol Scand 48 (1), 2004, 128-134

    NARCIS (Netherlands)

    Stevens, M. F.; Hoppe, M.; Holthusen, H.; Lipfert, P.

    2004-01-01

    BACKGROUND: In isolated nerves, tetrodotoxin (TTX) blocks nerve conduction longer than bupivacaine. In vivo, however, both substances block nerve conduction to an equal duration, presumably because the hydrophilic TTX binds only weakly to the perineural tissue. High molecular weight hyaluronic acid

  11. I Congreso Internacional sobre Domótica, Robótica y Teleasistencia para Todos. DRT4Aall 2005. Libro de Actas

    OpenAIRE

    2006-01-01

    Este volumen recoge las comunicaciones y los pósteres (en forma resumida) presentados en la I Congreso Internacional sobre Domótica, Robótica y Teleasistencia para Todos, celebrado en Madrid en 2005. De los campos citados, el más representado aquí es la robótica, área en la que se dan conocer dispositivos de apoyo a la movilidad, a la rehabilitación médica y a la realización de actividades de la vida diaria, entre otras aplicaciones. Le siguen los contenidos sobre domótica, es decir, el diseñ...

  12. Tiny tweaks, big changes: An alternative strategy to empower ethical culture of human research in anesthesia (A Taiwan Acta Anesthesiologica Taiwanica-Ethics Review Task Force Report).

    Science.gov (United States)

    Luk, Hsiang-Ning; Ennever, John F; Day, Yuan-Ji; Wong, Chih-Shung; Sun, Wei-Zen

    2015-03-01

    For this guidance article, the Ethics Review Task Force (ERTF) of the Journal reviewed and discussed the ethics issues related to publication of human research in the field of anesthesia. ERTF first introduced international ethics principles and minimal requirements of reporting of ethics practices, followed by discussing the universal problems of publication ethics. ERTF then compared the accountability and methodology of several medical journals in assuring authors' ethics compliance. Using the Taiwan Institutional Review Board system as an example, ERTF expressed the importance of institutional review board registration and accreditation to assure human participant protection. ERTF presented four major human research misconducts in the field of anesthesia in recent years. ERTF finally proposed a flow-chart to guide journal peer reviewers and editors in ethics review during the editorial process in publishing. Examples of template languages applied in the Ethics statement section in the manuscript are expected to strengthen the ethics compliance of the authors and to set an ethical culture for all the stakeholders involved in human research. Copyright © 2015. Published by Elsevier B.V.

  13. An analysis of U.S. Army Corps of Engineers documents supporting the channelization of the Rio Piedras. Acta Cientifica. 27(1-3).

    Science.gov (United States)

    Ariel Lugo; C.J. Nytch; M. Ramsey

    2013-01-01

    This paper has three objectives: 1) to provide a synopsis of the content of the reports, documents, data, and arguments used by the Corps to justify the channelization of the Rio Piedras; 2) to evaluate the accuracy of predictions and assumptions used by the Corps to reach conclusions that justify the channelization of the Rio Piedras; and 3) to make a case for the...

  14. Actas de la Segunda conferencia internacional en ciencia de la computacion (proceedings of the 2nd international conference on computer science)

    Energy Technology Data Exchange (ETDEWEB)

    1982-01-01

    The following topics were dealt with: relational databases; memory unit environments; artificial intelligence systems; programming theory; functional programming; distributed systems; and abstract data types. 13 papers were presented, of which 13 are published in full in the present proceedings. Abstracts of individual papers can be found under the relevant classification codes in this or other issues.

  15. Addressing the Issue of Microplastics in the Wake of the Microbead-Free Waters Act-A New Standard Can Facilitate Improved Policy.

    Science.gov (United States)

    McDevitt, Jason P; Criddle, Craig S; Morse, Molly; Hale, Robert C; Bott, Charles B; Rochman, Chelsea M

    2017-06-20

    The United States Microbead-Free Waters Act was signed into law in December 2015. It is a bipartisan agreement that will eliminate one preventable source of microplastic pollution in the United States. Still, the bill is criticized for being too limited in scope, and also for discouraging the development of biodegradable alternatives that ultimately are needed to solve the bigger issue of plastics in the environment. Due to a lack of an acknowledged, appropriate standard for environmentally safe microplastics, the bill banned all plastic microbeads in selected cosmetic products. Here, we review the history of the legislation and how it relates to the issue of microplastic pollution in general, and we suggest a framework for a standard (which we call "Ecocyclable") that includes relative requirements related to toxicity, bioaccumulation, and degradation/assimilation into the natural carbon cycle. We suggest that such a standard will facilitate future regulation and legislation to reduce pollution while also encouraging innovation of sustainable technologies.

  16. Erratum to : Modeling of complex interfaces for pendant drop experiments (Rheologica Acta, , 55, 10, (801-822), 10.1007/s00397-016-0956-1)

    NARCIS (Netherlands)

    Balemans, C.; Hulsen, M.A.; Tervoort, T.A.; Anderson, P.D.

    2017-01-01

    The original version of this article unfortunately contained mistakes. Theo A. Tervoort was not listed among the authors. The correct information is given above. In Balemans et al. (2016), an axisymmetric finite element model is presented to study the behaviour of complex interfaces in pendant drop

  17. VI Actas Congreso. Miedos, culpas, violencias invisibles y su impacto en la vida de las mujeres: ¡A vueltas con el amor!

    OpenAIRE

    Gil Gómez, Alicia; Escrig Gil, Gemma; Forcada Martínez, Águeda

    2010-01-01

    ÍNDICE. Presentación,ESPERANZA BOSCH FIOL. Introducción poética, PACA GABALDÓN, CLAUDIA GRAVI Y Mª LUISA SAN JOSÉ. Justo el amor, MARÍA XOSÉ AGRA ROMERO. I. CONFERENCIAS El género en cuestión. Modelos imposibles y modelos perversos,DOLORES JULIANO CORREGIDO. La propia identidad y las relaciones de amor en la adolescencia, AURORA LEAL GARCÍA Feelings of fear and guilt among women in conflicts and wars.Miedos y culpas de mujeres en situaciones de conflictos y de guerra, RAN...

  18. The active site of hen egg-white lysozyme: flexibility and chemical bonding

    Energy Technology Data Exchange (ETDEWEB)

    Held, Jeanette, E-mail: jeanette.netzel@uni-bayreuth.de; Smaalen, Sander van [University of Bayreuth, D-95440 Bayreuth (Germany)

    2014-04-01

    Chemical bonding at the active site of lysozyme is analyzed on the basis of a multipole model employing transferable multipole parameters from a database. Large B factors at low temperatures reflect frozen-in disorder, but therefore prevent a meaningful free refinement of multipole parameters. Chemical bonding at the active site of hen egg-white lysozyme (HEWL) is analyzed on the basis of Bader’s quantum theory of atoms in molecules [QTAIM; Bader (1994 ▶), Atoms in Molecules: A Quantum Theory. Oxford University Press] applied to electron-density maps derived from a multipole model. The observation is made that the atomic displacement parameters (ADPs) of HEWL at a temperature of 100 K are larger than ADPs in crystals of small biological molecules at 298 K. This feature shows that the ADPs in the cold crystals of HEWL reflect frozen-in disorder rather than thermal vibrations of the atoms. Directly generalizing the results of multipole studies on small-molecule crystals, the important consequence for electron-density analysis of protein crystals is that multipole parameters cannot be independently varied in a meaningful way in structure refinements. Instead, a multipole model for HEWL has been developed by refinement of atomic coordinates and ADPs against the X-ray diffraction data of Wang and coworkers [Wang et al. (2007), Acta Cryst. D63, 1254–1268], while multipole parameters were fixed to the values for transferable multipole parameters from the ELMAM2 database [Domagala et al. (2012), Acta Cryst. A68, 337–351] . Static and dynamic electron densities based on this multipole model are presented. Analysis of their topological properties according to the QTAIM shows that the covalent bonds possess similar properties to the covalent bonds of small molecules. Hydrogen bonds of intermediate strength are identified for the Glu35 and Asp52 residues, which are considered to be essential parts of the active site of HEWL. Furthermore, a series of weak C

  19. The active site of hen egg-white lysozyme: flexibility and chemical bonding

    International Nuclear Information System (INIS)

    Held, Jeanette; Smaalen, Sander van

    2014-01-01

    Chemical bonding at the active site of lysozyme is analyzed on the basis of a multipole model employing transferable multipole parameters from a database. Large B factors at low temperatures reflect frozen-in disorder, but therefore prevent a meaningful free refinement of multipole parameters. Chemical bonding at the active site of hen egg-white lysozyme (HEWL) is analyzed on the basis of Bader’s quantum theory of atoms in molecules [QTAIM; Bader (1994 ▶), Atoms in Molecules: A Quantum Theory. Oxford University Press] applied to electron-density maps derived from a multipole model. The observation is made that the atomic displacement parameters (ADPs) of HEWL at a temperature of 100 K are larger than ADPs in crystals of small biological molecules at 298 K. This feature shows that the ADPs in the cold crystals of HEWL reflect frozen-in disorder rather than thermal vibrations of the atoms. Directly generalizing the results of multipole studies on small-molecule crystals, the important consequence for electron-density analysis of protein crystals is that multipole parameters cannot be independently varied in a meaningful way in structure refinements. Instead, a multipole model for HEWL has been developed by refinement of atomic coordinates and ADPs against the X-ray diffraction data of Wang and coworkers [Wang et al. (2007), Acta Cryst. D63, 1254–1268], while multipole parameters were fixed to the values for transferable multipole parameters from the ELMAM2 database [Domagala et al. (2012), Acta Cryst. A68, 337–351] . Static and dynamic electron densities based on this multipole model are presented. Analysis of their topological properties according to the QTAIM shows that the covalent bonds possess similar properties to the covalent bonds of small molecules. Hydrogen bonds of intermediate strength are identified for the Glu35 and Asp52 residues, which are considered to be essential parts of the active site of HEWL. Furthermore, a series of weak C

  20. Gamma activity and residual power of a shutdown reactor after an irregular operating. Acta code for IBM computer 7094, 360 or CDC 6600; Activite gamma et puissance residuelle d'un reacteur a l'arret apres un fonctionnement irregulier. Programme Acta pour calculateur IBM 7094, 360 ou CDC 6600

    Energy Technology Data Exchange (ETDEWEB)

    Rafalovitch, A

    1967-07-01

    the aim of this study is to evaluate the influence of the power variation in time. The calculation method and the associated software are described. The last chapter applied the method to a determined problem. (A.L.B.)

  1. Advances in the EDM-DEDM procedure.

    Science.gov (United States)

    Caliandro, Rocco; Carrozzini, Benedetta; Cascarano, Giovanni Luca; Giacovazzo, Carmelo; Mazzone, Anna Maria; Siliqi, Dritan

    2009-03-01

    The DEDM (difference electron-density modification) algorithm has been described in a recent paper [Caliandro et al. (2008), Acta Cryst. A64, 519-528]: it breaks down the collinearity between model structure phases and difference structure phase estimates. The new difference electron-density produced by DEDM, summed to the calculated Fourier maps, is expected to provide a representation of the full structure that is more accurate than that obtained by the observed Fourier synthesis. In the same paper, the DEDM algorithm was combined with the EDM (electron-density modification) approach to give the EDM-DEDM procedure which, when applied to practical molecular-replacement cases, was able to improve the model structures. In this paper, it is shown that EDM-DEDM suffers from some critical points that did not allow cyclical application of the procedure. These points are identified and modifications are made to allow iteration of the procedure. The applications indicate that EDM-DEDM may become a fundamental tool in protein crystallography.

  2. 4-(4-Bromophenyl-7,7-dimethyl-2-methylamino-3-nitro-7,8-dihydro-4H-chromen-5(6H-one including an unknown solvate

    Directory of Open Access Journals (Sweden)

    S. Antony Inglebert

    2014-05-01

    Full Text Available In the title compound, C18H19BrN2O4, the chromene unit is not quite planar (r.m.s. deviation = 0.199 Å, with the methyl C atoms lying 0.027 (4 and 1.929 (4 Å from the mean plane of the chromene unit. The six-membered carbocyclic ring of the chromene moiety adopts an envelope conformation, with the dimethyl-substituted C atom as the flap. The methylamine and nitro groups are slightly twisted from the chromene moiety, with C—N—C—O and O—N—C—C torsion angles of 2.7 (4 and −0.4 (4°, respectively. The dihedral angle between the mean plane of the chromene unit and the benzene ring is 85.61 (13°. An intramolecular N—H...O hydrogen bond generates an S(6 ring motif, which stabilizes the molecular conformation. In the crystal, molecules are linked via N—H...O hydrogen bonds, forming hexagonal rings lying parallel to the ab plane. A region of disordered electron density, most probably disordered ethanol solvent molecules, occupying voids of ca 432 Å3 for an electron count of 158, was treated using the SQUEEZE routine in PLATON [Spek (2009. Acta Cryst. D65, 148–155]. Their formula mass and unit-cell characteristics were not taken into account during refinement.

  3. Structural and spectral analyses of N,N'-(2,2'-dithiodi-o-phenylene)bis-(furan-2-carboxamide)

    Science.gov (United States)

    Yıldırım, Sema Öztürk; Büyükmumcu, Zeki; Pekdur, Özlem Savaş; Butcher, Ray J.; Doǧan, Şengül Dilem

    2018-02-01

    In this study we report structure determination of N,N'-(2,2'-dithiodi-o-phenylene)bis-(furan-2-carboxamide). 2,2'-Dithiobis(benzamide) derivatives have been reported to possess important biological properties such as antibacterial, antifungal activities and inhibition of blood platelet aggregation and redeterrmined at 100(2)K from the data published by Raftery, Lallbeeharry, Bhowon, Laulloo & Joulea [Acta Cryst. 2009, E65, o16]. 2,2'-Dithiobis(N-butyl-benzamide) has been reported to be useful as an antiseptic for cosmetics. The structural properties of the compound have been characterized by using 1H NMR and the structure were determined by single-crystal X-ray diffraction. Molecular structure crystallizes in triclinic form, space group with a = 9.6396(7) Å, b = 9.9115(7) Å, c = 12.0026(8) Å, α = 109.743(6)°, β = 103.653(6)°, γ = 104.633(6)° and V = 977.15(13) Å3. In the solid state of the molecular structure N-H…S, N-H…O and C-H…O, type interactions provide for stabilization. The geometries of the title compound have been optimized using density functional theory (DFT) method. The calculated values were found to be in agreement with the experimental data.

  4. Validation of experimental molecular crystal structures with dispersion-corrected density functional theory calculations.

    Science.gov (United States)

    van de Streek, Jacco; Neumann, Marcus A

    2010-10-01

    This paper describes the validation of a dispersion-corrected density functional theory (d-DFT) method for the purpose of assessing the correctness of experimental organic crystal structures and enhancing the information content of purely experimental data. 241 experimental organic crystal structures from the August 2008 issue of Acta Cryst. Section E were energy-minimized in full, including unit-cell parameters. The differences between the experimental and the minimized crystal structures were subjected to statistical analysis. The r.m.s. Cartesian displacement excluding H atoms upon energy minimization with flexible unit-cell parameters is selected as a pertinent indicator of the correctness of a crystal structure. All 241 experimental crystal structures are reproduced very well: the average r.m.s. Cartesian displacement for the 241 crystal structures, including 16 disordered structures, is only 0.095 Å (0.084 Å for the 225 ordered structures). R.m.s. Cartesian displacements above 0.25 A either indicate incorrect experimental crystal structures or reveal interesting structural features such as exceptionally large temperature effects, incorrectly modelled disorder or symmetry breaking H atoms. After validation, the method is applied to nine examples that are known to be ambiguous or subtly incorrect.

  5. Can I solve my structure by SAD phasing? Planning an experiment, scaling data and evaluating the useful anomalous correlation and anomalous signal.

    Science.gov (United States)

    Terwilliger, Thomas C; Bunkóczi, Gábor; Hung, Li Wei; Zwart, Peter H; Smith, Janet L; Akey, David L; Adams, Paul D

    2016-03-01

    A key challenge in the SAD phasing method is solving a structure when the anomalous signal-to-noise ratio is low. Here, algorithms and tools for evaluating and optimizing the useful anomalous correlation and the anomalous signal in a SAD experiment are described. A simple theoretical framework [Terwilliger et al. (2016), Acta Cryst. D72, 346-358] is used to develop methods for planning a SAD experiment, scaling SAD data sets and estimating the useful anomalous correlation and anomalous signal in a SAD data set. The phenix.plan_sad_experiment tool uses a database of solved and unsolved SAD data sets and the expected characteristics of a SAD data set to estimate the probability that the anomalous substructure will be found in the SAD experiment and the expected map quality that would be obtained if the substructure were found. The phenix.scale_and_merge tool scales unmerged SAD data from one or more crystals using local scaling and optimizes the anomalous signal by identifying the systematic differences among data sets, and the phenix.anomalous_signal tool estimates the useful anomalous correlation and anomalous signal after collecting SAD data and estimates the probability that the data set can be solved and the likely figure of merit of phasing.

  6. (η(6)-Benzene)(carbonato-κ(2) O,O')[di-cyclohex-yl(naphthalen-1-ylmeth-yl)phosphane-κP]ruthenium(II) chloro-form tris-olvate.

    Science.gov (United States)

    Gowrisankar, Saravanan; Neumann, Helfried; Spannenberg, Anke; Beller, Matthias

    2014-07-01

    The title compound, [Ru(CO3)(η(6)-C6H6){(C6H11)2P(CH2C10H7)}]·3CHCl3, was synthesized by carbonation of [RuCl2(η(6)-C6H6){(C6H11)2P(CH2C10H7)}] with NaHCO3 in methanol at room temperature. The Ru(II) atom is surrounded by a benzene ligand, a chelating carbonate group and a phosphane ligand in a piano-stool configuration. The crystal packing is consolidated by C-H⋯O and C-H⋯Cl hydrogen-bonding inter-actions between adjacent metal complexes and between the complexes and the solvent mol-ecules. The asymmetric unit contains one metal complex and three chloro-form solvent mol-ecules of which only one was modelled. The estimated diffraction contributions of the other two strongly disordered chloro-form solvent mol-ecules were substracted from the observed diffraction data using the SQUEEZE procedure in PLATON [Spek (2009 ▶). Acta Cryst. D65, 148-155].

  7. (η6-Benzene)(carbonato-κ2 O,O′)[di­cyclohex­yl(naphthalen-1-ylmeth­yl)phosphane-κP]ruthenium(II) chloro­form tris­olvate

    Science.gov (United States)

    Gowrisankar, Saravanan; Neumann, Helfried; Spannenberg, Anke; Beller, Matthias

    2014-01-01

    The title compound, [Ru(CO3)(η6-C6H6){(C6H11)2P(CH2C10H7)}]·3CHCl3, was synthesized by carbonation of [RuCl2(η6-C6H6){(C6H11)2P(CH2C10H7)}] with NaHCO3 in methanol at room temperature. The RuII atom is surrounded by a benzene ligand, a chelating carbonate group and a phosphane ligand in a piano-stool configuration. The crystal packing is consolidated by C—H⋯O and C—H⋯Cl hydrogen-bonding inter­actions between adjacent metal complexes and between the complexes and the solvent mol­ecules. The asymmetric unit contains one metal complex and three chloro­form solvent mol­ecules of which only one was modelled. The estimated diffraction contributions of the other two strongly disordered chloro­form solvent mol­ecules were substracted from the observed diffraction data using the SQUEEZE procedure in PLATON [Spek (2009 ▶). Acta Cryst. D65, 148–155]. PMID:25161531

  8. (η6-Benzene(carbonato-κ2O,O′[dicyclohexyl(naphthalen-1-ylmethylphosphane-κP]ruthenium(II chloroform trisolvate

    Directory of Open Access Journals (Sweden)

    Saravanan Gowrisankar

    2014-07-01

    Full Text Available The title compound, [Ru(CO3(η6-C6H6{(C6H112P(CH2C10H7}]·3CHCl3, was synthesized by carbonation of [RuCl2(η6-C6H6{(C6H112P(CH2C10H7}] with NaHCO3 in methanol at room temperature. The RuII atom is surrounded by a benzene ligand, a chelating carbonate group and a phosphane ligand in a piano-stool configuration. The crystal packing is consolidated by C—H...O and C—H...Cl hydrogen-bonding interactions between adjacent metal complexes and between the complexes and the solvent molecules. The asymmetric unit contains one metal complex and three chloroform solvent molecules of which only one was modelled. The estimated diffraction contributions of the other two strongly disordered chloroform solvent molecules were substracted from the observed diffraction data using the SQUEEZE procedure in PLATON [Spek (2009. Acta Cryst. D65, 148–155].

  9. The alignment of smectic A liquid crystals with director tilt on the boundaries

    International Nuclear Information System (INIS)

    Stewart, I W

    2007-01-01

    Equilibrium solutions are presented for smectic A liquid crystals in which the usual director n and unit layer normal a do not necessarily coincide. Previous applications often equate n with a; the model in this paper allows n and a to differ and has been motivated by the recent investigations of Auernhammer et al (2000 Rheol. Acta 39 215-22, 2002 Phys. Rev. E 66 061707), Soddemann et al (2004 Eur. Phys. J. E 13 141-51) and Stewart (2007 Contin. Mech. Thermodyn. 18 343-60). The two experimental geometries studied consist of planar homeotropically aligned smectic layers and 'bookshelf' aligned layers. In both cases a director tilt at the boundaries will be imposed. Solutions to the fully nonlinear bookshelf problem where both the director and the layer normal can vary with an element of decoupling are presented and are particularly relevant to the experimental observations of Elston (1994 Liq. Cryst. 16 151-7); there are two boundary layer effects, as will be discussed, that are related to the biasing of the director towards the smectic A phase and the reorientation of the smectic layers themselves

  10. The alignment of smectic A liquid crystals with director tilt on the boundaries

    Energy Technology Data Exchange (ETDEWEB)

    Stewart, I W [Department of Mathematics, University of Strathclyde, Livingstone Tower, 26 Richmond Street, Glasgow, G1 1XH (United Kingdom)

    2007-05-18

    Equilibrium solutions are presented for smectic A liquid crystals in which the usual director n and unit layer normal a do not necessarily coincide. Previous applications often equate n with a; the model in this paper allows n and a to differ and has been motivated by the recent investigations of Auernhammer et al (2000 Rheol. Acta 39 215-22, 2002 Phys. Rev. E 66 061707), Soddemann et al (2004 Eur. Phys. J. E 13 141-51) and Stewart (2007 Contin. Mech. Thermodyn. 18 343-60). The two experimental geometries studied consist of planar homeotropically aligned smectic layers and 'bookshelf' aligned layers. In both cases a director tilt at the boundaries will be imposed. Solutions to the fully nonlinear bookshelf problem where both the director and the layer normal can vary with an element of decoupling are presented and are particularly relevant to the experimental observations of Elston (1994 Liq. Cryst. 16 151-7); there are two boundary layer effects, as will be discussed, that are related to the biasing of the director towards the smectic A phase and the reorientation of the smectic layers themselves.

  11. (E-1-Phenylethanone semicarbazone

    Directory of Open Access Journals (Sweden)

    Hoong-Kun Fun

    2009-08-01

    Full Text Available In the title compound, C9H11N3O, the benzene ring is disordered over two positions with refined occupancies of 0.922 (5 and 0.078 (5. The program PLATON [Spek (2009. Acta Cryst. D65, 148–155] recommends the solution in the space group C2/m with a = 7.3050 (3, b = 6.6745 (2, c = 18.3853 (6 Å and β = 96.986 (2°. However, the large number of non-extinct reflections needed to be ignored if C2/m is chosen suggested that the space group is incorrect, even though the R values are lower than that for P21/c. The semicarbazone group is essentially planar, with a maximum deviation of 0.046 (1 Å for one of the N atoms. The mean plane of the semicarbazone group forms dihedral angles of 33.61 (8 and 39.1 (9° with the benzene ring of the major and minor components, respectively. In the crystal structure, molecules are linked by intermolecular N—H...O hydrogen bonds into extended chains along the c axis. The crystal structure is further stabilized by weak intermolucular C—H...π interactions.

  12. A P212121 polymorph of (+-clusianone

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    Teng-Jin Khoo

    2013-12-01

    Full Text Available The title compound, C33H42O4 [systematic name: (1S,5S,7R-3-benzoyl-4-hydroxy-8,8-dimethyl-1,5,7-tris(3-methylbut-2-enylbicyclo[3.3.1]nona-3-ene-2,9-dione], has a central bicyclo[3.3.1]nonane-2,4,9-trione surrounded by tetraprenylated and benzoyl groups. The compound was recrystallized several times in methanol using both a slow evaporation method and with a crystal-seeding technique. This subsequently produced diffraction-quality crystals which crystallize in the orthorhombic space group P212121, in contrast to a previous report of a structure determination in the Pna21 space group [McCandlish et al. (1976. Acta Cryst. B32, 1793–1801]. The title compound has a melting point of 365–366 K, and a specific rotation [α]20 value of +51.94°. A strong intramolecular O—H...O hydrogen bond is noted. In the crystal, molecules are assembled in the ab plane by weak C—H...O interactions.

  13. Crystal structure of tetrakis[μ2-2-(dimethylaminoethanolato-κ3N,O:O]di-μ3-hydroxido-dithiocyanato-κ2N-dichromium(IIIdilead(II dithiocyanate acetonitrile monosolvate

    Directory of Open Access Journals (Sweden)

    Julia A. Rusanova

    2016-04-01

    Full Text Available The tetranuclear complex cation of the title compound, [Cr2Pb2(NCS2(OH2(C4H10NO4](SCN2·CH3CN, lies on an inversion centre. The main structural feature of the cation is a distorted seco-norcubane Pb2Cr2O6 cage with a central four-membered Cr2O2 ring. The CrIII ion is coordinated in a distorted octahedron, which involves two N atoms of one bidentate ligand and one thiocyanate anion, two μ2-O atoms of 2-(dimethylaminoethanolate ligands and two μ3-O atoms of hydroxide ions. The coordination geometry of the PbII ion is a distorted disphenoid, which involves one N atom, two μ2-O atoms and one μ3-O atom. In addition, weak Pb...S interactions involving the coordinating and non-coordinating thiocyanate anions are observed. In the crystal, the complex cations are linked through the thiocyanate anions via the Pb...S interactions and O—H...N hydrogen bonds into chains along the c axis. The chains are further linked together via S...S contacts. The contribution of the disordered solvent acetonitrile molecule was removed with the SQUEEZE [Spek (2015. Acta Cryst. C71, 9–18] procedure in PLATON. The solvent is included in the reported molecular formula, weight and density.

  14. Nitrosonium complexation by the tetraphosphonate cavitand 5,11,17,23-tetramethyl-6,10:12,16:18,22:24,4-tetrakis(phenylphosphonato-κ2O,Oresorcin(4arene

    Directory of Open Access Journals (Sweden)

    Roberta Pinalli

    2017-12-01

    Full Text Available The crystal structure of a new supramolecular complex between the tetraphosphonate cavitand 5,11,17,23-tetramethyl-6,10:12,16:18,22:24,4-tetrakis(phenylphosphonato-κ2O,O′resorcin(4arene and the nitrosyl cation NO+, as the BF4− salt, is reported. The complex, of general formula [(C56H44P4O12(NO]BF4·CH2Cl2 or NO@Tiiii[H, CH3, C6H5] BF4·CH2Cl2, crystallizes in the space group P-1. The nitrosyl cation is disordered over two equivalent positions, with occupancies of 0.503 (2 and 0.497 (2, and interacts with two adjacent P=O groups at the upper rim of the cavitand through dipole–charge interactions. In the lattice, the cavitands are connected through a series of C—H...π interactions involving the methyl and methylenic H atoms and the aromatic rings of the macrocycle. The structure is further stabilized by the presence of C—H...F interactions between the hydrogen atoms of the cavitands and the F atoms of the tetrafluoridoborate anion. As a result of the disorder, the lattice dichloromethane molecules could not be modelled in terms of atomic sites, and were treated using the PLATON SQUEEZE procedure [Spek (2015. Acta Cryst. C71, 9–18]. The complexation process has also been studied in solution through NMR titrations.

  15. (1,6,7,12-Tetraazaperylene-κ2N,N′bis(4,4′,5,5′-tetramethyl-2,2′-bipyridyl-κ2N,N′ruthenium(II bis(hexafluoridophosphate acetonitrile trisolvate

    Directory of Open Access Journals (Sweden)

    Thomas Brietzke

    2014-06-01

    Full Text Available In the title compound, rac-[Ru(C14H16N22(C16H8N4](PF62·3C2H3N, discrete dimers of complex cations, [Ru(tmbpy2tape]2+, of opposite chirality are formed (tmbpy = tetramethylbipyridine; tape = tetraazaperylene, held together by π–π stacking interactions between the tetraazaperylene moieties with centroid–centroid distances in the range 3.563 (3–3.837 (3 Å. These interactions exhibit a parallel displaced π–π stacking mode. Additional weak C—H...π-ring and C—H...N and C—H...F interactions are found, leading to a three-dimensional architecture. The RuII atom is coordinated in a distorted octahedral geometry. The counter-charge is provided by two hexafluoridophosphate anions and the asymmetric unit is completed by three acetonitrile solvent molecules of crystallization. Four F atoms of one PF6− anion are disordered over three sets of sites with occupancies of 0.517 (3:0.244 (3:0.239 (3. Two acetonitrile solvent molecules are highly disordered and their estimated scattering contribution was subtracted from the observed diffraction data using the SQUEEZE option in PLATON [Spek (2009. Acta Cryst. D65, 148–155].

  16. Protein energy landscapes determined by five-dimensional crystallography

    International Nuclear Information System (INIS)

    Schmidt, Marius; Srajer, Vukica; Henning, Robert; Ihee, Hyotcherl; Purwar, Namrta; Tenboer, Jason; Tripathi, Shailesh

    2013-01-01

    Barriers of activation within the photocycle of a photoactive protein were extracted from comprehensive time courses of time resolved crystallographic data collected at multiple temperature settings. Free-energy landscapes decisively determine the progress of enzymatically catalyzed reactions [Cornish-Bowden (2012 ▶), Fundamentals of Enzyme Kinetics, 4th ed.]. Time-resolved macromolecular crystallography unifies transient-state kinetics with structure determination [Moffat (2001 ▶), Chem. Rev.101, 1569–1581; Schmidt et al. (2005 ▶), Methods Mol. Biol.305, 115–154; Schmidt (2008 ▶), Ultrashort Laser Pulses in Medicine and Biology] because both can be determined from the same set of X-ray data. Here, it is demonstrated how barriers of activation can be determined solely from five-dimensional crystallography, where in addition to space and time, temperature is a variable as well [Schmidt et al. (2010 ▶), Acta Cryst. A66, 198–206]. Directly linking molecular structures with barriers of activation between them allows insight into the structural nature of the barrier to be gained. Comprehensive time series of crystallographic data at 14 different temperature settings were analyzed and the entropy and enthalpy contributions to the barriers of activation were determined. One hundred years after the discovery of X-ray scattering, these results advance X-ray structure determination to a new frontier: the determination of energy landscapes

  17. 1,4,9,12-Tetramethoxy-14-octyl-5,8-dihydrodiindolo[3,2-b;2′,3′-h]carbazole with an unknown solvent

    Directory of Open Access Journals (Sweden)

    Norma Wrobel

    2017-03-01

    Full Text Available The title compound, 2C36H39N3O4·H2O, is a linear π-conjugated ladder oligomer with an alkyl chain on the central nitrogen atom. This diindolocarbazole, prepared via a twofold Cadogan reaction, adopts a sligthly convex shape, anti to the disordered octyl group. The unit cell contains nine molecules of the title compound and half a water molecule per main molecule. The water molecule forms hydrogen bridges, connecting the carbazole-NH and methoxy groups of different molecules. The crystal contains solvent molecules which are located in a channel parallel to the c axis. It was not possible to determine the position and nature of the solvent (a mixure of choroform, n-pentane and DMSO. The SQUEEZE [Spek (2015. Acta Cryst. C71, 9–18] option of PLATON was used to model the missing electron density. The given chemical formula and other crystal data do not take into account these solvent molecules.

  18. An unexpected oxidation: NaK5Cl2(S2O62 revisited

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    William T. A. Harrison

    2017-02-01

    Full Text Available The title compound, NaK5Cl2(S2O62 [systematic name: sodium pentapotassium dichloride bis(dithionate], arose as an unexpected product from an organic synthesis that used dithionite (S2O42− ions as a reducing agent to destroy excess permanganate ions. Compared to the previous study [Stanley (1953. Acta Cryst. 6, 187–196], the present tetragonal structure exhibits a root 2a × root 2a × c super-cell due to subtle changes in the orientations of the dithionate anions. The structure can be visualized as a three-dimensional framework of [001] columns of alternating trans-NaO4Cl2 and KO4Cl2 octahedra cross-linked by the dithionate ions with the interstices occupied by KO6Cl2 polyhedra to generate a densely packed three-dimensional framework. The asymmetric unit comprises two sodium ions (site symmetries 4 and -4, four potassium ions (site symmetries = -4, 4, 1 and 1, three chloride ions (site symmetries = 4, 4 and 2 and two half-dithionate ions (all atoms on general positions. Both dithionate ions are completed by crystallographic inversion symmetry. The crystal chosen for data collection was found to be rotationally twinned by 180° about the [100] axis in reciprocal space with a 0.6298 (13:0.3702 (13 domain ratio.

  19. Tetrakis(μ2-2,2-dimethylpropanoato-κ2O,O′bis[(pyridine-κNcopper(II]: a monoclinic polymorph

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    Lailatun Nazirah Ozair

    2010-05-01

    Full Text Available The structure of the dinuclear title complex, [Cu2(C5H9O24(C5H5N2], represents a monoclinic polymorph of the previously reported triclinic form [Blewett et al. (2006. Acta Cryst. E62, m420–m422]. Each carboxylate group is bidentate bridging and the distorted octahedral geometry about each CuII atom is completed by a pyridine N atom and the other Cu atom [Cu...Cu = 2.6139 (7 Å]. In the crystal, molecules are connected into supramolecular chains via π–π interactions formed by the pyridine rings [centroid–centroid distance = 3.552 (3 Å] and these are connected into a two-dimensional array in the ac plane by C—H...π contacts. One of the tert-butyl groups is disordered over two orientations in a 0.734 (6:0.266 (6 ratio.

  20. A second orthorhombic polymorph of (Z-3-(9-anthryl-1-(2-thienylprop-2-en-1-oneThis paper is dedicated to His Majesty King Bhumibol Adulyadej of Thailand (King Rama IX for his sustainable development of the country.

    Directory of Open Access Journals (Sweden)

    Suchada Chantrapromma

    2010-02-01

    Full Text Available The title heteroaryl chalcone, C21H14OS, is a second orthorhombic polymorph which crystallizes in the space group P212121. The structure was previously reported [Fun et al. (2009. Acta Cryst. E65, o2168-o2169] in the space group Pna21. The bond distances and angles are similar in both structures. In contrast, the overall crystal packing is different from that in the first orthorhombic Pna21 polymorph in which molecules were stacked into columns along the b axis and the thiophene units of two adjacent columns were stacked in a head to tail fashion. In the present polymorph, molecules are found to dimerize through a weak S...S interaction [3.6513 (7 Å] and these dimers are arranged into sheets parallel to the bc plane. There are no classical hydrogen bonds in the packing which features short C...O [3.2832 (2–3.6251 (9 Å], C...S [3.4879 (17–3.6251 (19 Å] and S...O [2.9948 (16 Å] contacts, together with C—H...π interactions. Similar contacts were found in the other polymorph.

  1. 4′,5-Dihy­droxy-7-meth­oxy­flavanone dihydrate

    Science.gov (United States)

    Brito, Iván; Bórquez, Jorge; Simirgiotis, Mario; Cárdenas, Alejandro; López-Rodríguez, Matías

    2012-01-01

    The title compound, C16H14O5·2H2O [systematic name: 5-hy­droxy-2-(4-hy­droxy­phen­yl)-7-meth­oxy­chroman-4-one dihydrate], is a natural phytoalexin flavone isolated from the native chilean species Heliotropium taltalense and crystallizes with an organic mol­ecule and two water mol­ecules in the asymmetric unit. The 5-hy­droxy group forms a strong intra­molecular hydrogen bond with the carbonyl group, resulting in a six-membered ring. In the crystal, the components are linked by O—H⋯O hydrogen bonds, forming a three-dimensional network. The 4-hy­droxy­phenyl benzene ring is bonded equatorially to the pyrone ring, which adopts a slightly distorted sofa conformation. The title compound is the hydrated form of a previously reported structure [Shoja (1990 ▶). Acta Cryst. C46, 1969–1971]. There are only slight variations in the mol­ecular geometry between the two compounds. PMID:22259537

  2. Aqua(μ-cone-26,28-dibutoxy-25,27-bis{N-[5-(dimethylaminonaphthalene-1-sulfonyl]carbamoylmethoxy}-5,11,17,23-tetrakis(1,1-dimethylethylcalix[4]arene(2−disodium acetonitrile tetrasolvate

    Directory of Open Access Journals (Sweden)

    Pogisego Dinake

    2012-04-01

    Full Text Available The structure of the title complex, [Na2(C80H98N4O10S2(H2O]·4CH3CN, obtained after crystallization from acetonitrile, contains two formula units in the asymmetric unit (Z′ = 2 and an estimated four molecules of acetonitrile per calixarene moiety. It is unusual for two Na+ ions to occupy the lower rims of the cone calix[4]arene, as in this case, with one Na+ ion forming two O→ Na+ coordinate bonds with the two butoxy groups and four such bonds with the two N-dansyl carboxamide groups, forming six dative bonds between Na+ and O. On the other hand, the other Na+ ion forms only five O→Na+ coordinate bonds on the far end of the calix[4]arene lower rim, bringing the two dansyl groups in close proximity with each other. There also appears to be an O→Na+ coordination coming from a dangling water molecule. The structure contained both resolved and poorly resolved solvent molecules. The latter were treated using the SQUEEZE routine in PLATON [Spek (2009. Acta Cryst. D65, 148–155].

  3. Etude structurale et vibrationnelle d'un nouveau composé complexe de cobalt: [Co(imidazole)4Cl]Cl.

    Science.gov (United States)

    Derbel, Amira; Mhiri, Tahar; Graia, Mohsen

    2015-10-01

    In the title complex, chlorido-tetra-kis-(1H-imidazole-κN (3))cobalt(II) chloride, [CoCl(C3H4N2)4]Cl, the Co(II) cation has a distorted square-pyramidal coordination environment. It is coordinated by four N atoms of four imidazole (Im) groups in the basal plane, and by a Cl atom in the apical position. It is isostructural with [Cu(Im)4Cl]Cl [Morzyk-Ociepa et al. (2012 ▸). J. Mol. Struct. 1028, 49-56] and [Cu(Im)4Br]Br [Hossaini Sadr et al. (2004 ▸). Acta Cryst. E60, m1324-m1326]. In the crystal, the [CoCl(C3H4N2)4](+) cations and Cl(-) anions are linked via N-H⋯Cl hydrogen bonds, forming layers parallel to (010). These layers are linked via C-H⋯Cl hydrogen bonds and C-H⋯π and π-π [inter-centroid distance = 3.794 (2) Å] inter-actions, forming a three-dimensional framework. The IR spectrum shows vibrational bands typical for imidazol groups. The monoclinic unit cell of the title compound emulates an ortho-rhom-bic cell as its β angle is close to 90°. The crystal is twinned, with the refined ratio of twin components being 0.569 (1):0.431 (1).

  4. 5,10,15,20-Tetrakis(4-acetyloxyphenylporphyrin including an unknown solvate

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    Micael D. Miranda

    2012-12-01

    Full Text Available Molecules of the title compound, C52H38N4O8, are located on an inversion center so that the asymmetric cell contains one half of the molecule. The macrocycle exhibits a ruffled conformation with a maximum deviation of 0.16 Å for the 24 macrocycle atoms: the dihedral angle between adjacent five-membered rings is 5.13 (19°. The benzene rings are rotated by 70.25 (19° with respect to their adjacent protonated five-membered rings, and by 65.56 (19° with respect to the unprotonated rings. The porphyrin conformation is supported by bifurcated N—H...(N,N hydrogen bonds. The structure contained poorly resolved solvent molecules in voids of volume 217 Å3 per unit cell. The latter were treated using the SQUEEZE routine in PLATON [Spek (2009. Acta Cryst. D65, 148–155]. As the solvent could not be identified exactly, it was not included in the calculation of the overall formula weight, density and absorption coefficient.

  5. Theoretical study of the properties of X-ray diffraction moiré fringes. I

    International Nuclear Information System (INIS)

    Yoshimura, Jun-ichi

    2015-01-01

    A detailed and comprehensive theoretical description of X-ray diffraction moiré fringes for a bicrystal specimen is given on the basis of a calculation by plane-wave dynamical diffraction theory, where the effect of the Pendellösung intensity oscillation on the moiré pattern is explained in detail. A detailed and comprehensive theoretical description of X-ray diffraction moiré fringes for a bicrystal specimen is given on the basis of a calculation by plane-wave dynamical diffraction theory. Firstly, prior to discussing the main subject of the paper, a previous article [Yoshimura (1997 ▸). Acta Cryst. A53, 810–812] on the two-dimensionality of diffraction moiré patterns is restated on a thorough calculation of the moiré interference phase. Then, the properties of moiré fringes derived from the above theory are explained for the case of a plane-wave diffraction image, where the significant effect of Pendellösung intensity oscillation on the moiré pattern when the crystal is strained is described in detail with theoretically simulated moiré images. Although such plane-wave moiré images are not widely observed in a nearly pure form, knowledge of their properties is essential for the understanding of diffraction moiré fringes in general

  6. 4-Aminobenzoic acid 4-methylpyridine/4-methylpyridinium 4-aminobenzoate 0.58/0.42: a redetermination from the original data

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    Jan Fábry

    2017-10-01

    Full Text Available The title structure, 4-aminobenzoic acid 4-methylpyridine/4-methylpyridinium 4-aminobenzoate 0.58/0.42, 0.58(C6H7N·C7H7NO2·0.42(C6H8N+·C7H6NO2−, has been redetermined from the data published by Kumar et al. (2015. Acta Cryst. E71, o125-o126. The improvement of the present redetermination consists in the introduction of disorder of the methyl group over two positions as well as in the correction of the positional parameters of the hydrogen atoms that are involved in the O—H...N or N—H...O hydrogen bonds. After the correction, the hydroxyl hydrogen atom turned out to be disordered over two positions about the centre of the O...N bond, which is relatively long [2.642 (2 Å], while the H atoms of the primary amine group account more realistically for the hydrogen-bond pattern after the removal of the positional constraints. All the O—H...N or N—H...O hydrogen bonds which are present in the title structure are of moderate strength.

  7. Molecular and crystal structure of gossypol tetramethyl ether with an unknown solvate

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    Muhabbat Honkeldieva

    2015-02-01

    Full Text Available The title compound, C34H38O8 (systematic name: 5,5′-diisopropyl-2,2′,3,3′-tetramethoxy-7,7′-dimethyl-2H,2′H-8,8′-bi[naphtho[1,8-bc]furan]-4,4′-diol, has been obtained from a gossypol solution in a mixture of dimethyl sulfate and methanol. The molecule is situated on a twofold rotation axis, so the asymmetric unit contains one half-molecule. In the molecule, the hydroxy groups are involved in intramolecular O—H...O hydrogen bonds, and the two naphthyl fragments are inclined each to other by 83.8 (1°. In the crystal, weak C—H...O and C—H...π interactions consolidate the packing, which exhibits channels with an approximate diameter of 6 Å extending along the c-axis direction. These channels are filled with highly disordered solvent molecules, so their estimated scattering contribution was subtracted from the observed diffraction data using the SQUEEZE option in PLATON [Spek, A. L. (2015. Acta Cryst. C71, 9–18].

  8. Crystal structure of 2-methylamino-4-(6-methyl-4-oxo-4H-chromen-3-yl-3-nitropyrano[3,2-c]chromen-5(4H-one with an unknown solvate

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    Rajamani Raja

    2015-09-01

    Full Text Available In the title compound, C23H16N2O7, the mean planes of the two chromene units (r.m.s. deviations = 0.031 and 0.064 Å are almost normal to one another with a dihedral angle of 85.59 (6°. The central six-membered pyran ring has a distorted envelope conformation, with the methine C atom at the flap. There is an intramolecular N—H...O hydrogen bond, which generates an S(6 ring motif. In the crystal, molecules are linked by pairs of N—H...O hydrogen bonds, forming inversion dimers with an R22(12 ring motif. The dimers are linked by pairs of C—H...O hydrogen bonds, enclosing R22(6 ring motifs, forming zigzag chains along [001]. The chains are linked by a second pair of C—H...O hydrogen bonds, forming slabs parallel to (110. Within the slabs there are C—H...π interactions present. A region of disordered electron density was treated with the SQUEEZE procedure in PLATON [Spek (2015. Acta Cryst. C71, 9–18] following unsuccessful attempts to model it as plausible solvent molecule(s. The given chemical formula and other crystal data do not take into account the unknown solvent molecule(s.

  9. Crystal structure of triaqua(2,6-dimethylpyrazine-κN4bis(thiocyanato-κNmanganese(II 2,5-dimethylpyrazine disolvate

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    Stefan Suckert

    2015-12-01

    Full Text Available In the crystal structure of the title complex, [Mn(NCS2(C6H8N2(H2O3]·2C6H8N2, the MnII cation is coordinated by two terminally N-bonded thiocyanate anions, three water molecules and one 2,6-dimethylpyrazine ligand within a slightly distorted N3O3 octahedral geometry; the entire complex molecule is generated by the application of a twofold rotation axis. The asymmetric unit also contains an uncoordinating 2,5-dimethylpyrazine ligand in a general position. Obviously, the coordination to the 2,6-dimethylpyrazine ligand is preferred because coordination to the 2,5-dimethylpyrazine is hindered due to the bulky methyl group proximate to the N atom. The discrete complexes are linked by water-O—H...N(2,6-dimethylpyzazine/2,5-dimethylpyzazine hydrogen bonding, forming a three-dimensional network. In the crystal, molecules are arranged in a way that cavities are formed in which unspecified, disordered solvent molecules reside. These were modelled employing the SQUEEZE routine in PLATON [Spek (2015. Acta Cryst. C71, 9–18]. The composition of the unit cell does not take into account the presence of the unspecified solvent.

  10. Chlorido(pyridine-κN(5,10,15,20-tetraphenylporphyrinato-κ4Ncobalt(III chloroform hemisolvate

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    Yassin Belghith

    2012-08-01

    Full Text Available In the title complex, [CoCl(C44H28N4(C5H5N]·0.5CHCl3 or [CoIII(TPPCl(py]·0.5CHCl3 (where TPP is the dianion of tetraphenylporphyrin and py is pyridine, the average equatorial cobalt–pyrrole N atom bond length (Co—Np is 1.958 (7 Å and the axial Co—Cl and Co—Npy distances are 2.2339 (6 and 1.9898 (17 Å, respectively. The tetraphenylporphyrinate dianion exhibits an important nonplanar conformation with major ruffling and saddling distortions. In the crystal, molecules are linked via weak C—H...π interactions. In the difference Fourier map, a region of highly disordered electron density was estimated using the SQUEEZE routine [PLATON; Spek (2009, Acta Cryst. D65, 148–155] to be equivalent to one half-molecule of CHCl3 per molecule of the complex.

  11. Tetrakis(μ3-2-{[1,1-bis(hydroxymethyl-2-oxidoethyl]iminomethyl}-6-nitrophenolatotetracopper(II

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    Eduard N. Chygorin

    2014-02-01

    Full Text Available The title cluster, [Cu4(C11H12N2O64], was obtained from the Cu0–FeCl2·4H2O–H4L–Et3N–DMF reaction system (in air, where H4L is 2-hydroxymethyl-2{[(2-hydroxy-3-nitrophenylmethylidene]amino}propane-1,3-diol and DMF is dimethylformamide. The asymmetric unit consists of one Cu2+ ion and one dianionic ligand; a -4 symmetry element generates the cluster, which contains a {Cu4O4} cubane-like core. The metal ion has an elongated square-based pyramidal CuNO4 coordination geometry with the N atom in a basal site. An intramolecular O—H...O hydrogen bond is observed. The solvent molecules were found to be highly disordered and their contribution to the scattering was removed with the SQUEEZE procedure in PLATON [Spek (2009. Acta Cryst. D65, 148–155], which indicated a solvent cavity of volume 3131 Å3 containing approximately 749 electrons. These solvent molecules are not considered in the given chemical formula.

  12. Crystal structure of an unknown tetrahydrofuran solvate of tetrakis(μ3-cyanato-κ3N:N:Ntetrakis[(triphenylphosphane-κPsilver(I

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    Peter Frenzel

    2015-10-01

    Full Text Available In the title compound, [{[(C6H53P]Ag}4{NCO}4], a distorted Ag4N4-heterocubane core is set up by four AgI ions being coordinated by the N atoms of the cyanato anions in a μ3-bridging mode. In addition, a triphenylphosphine ligand is datively bonded to each of the AgI ions. Intramolecular Ag...Ag distances as short as 3.133 (9 Å suggest the presence of argentophilic (d10...d10 interactions. Five moderate-to-weak C—H...O hydrogen-bonding interactions are observed in the crystal structure, spanning a three-dimensional network. A region of electron density was treated with the SQUEEZE procedure in PLATON [Spek (2015. Acta Cryst. C71, 9–18] following unsuccessful attempts to model it as being part of disordered tetrahydrofuran solvent molecules. The given chemical formula and other crystal data do not take into account these solvent molecules.

  13. (RS-Efonidipine acetone hemisolvate

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    Yu-Heng Liu

    2016-09-01

    Full Text Available The asymmetric unit of the title compound, C34H38N3O7P·0.5C3H6O {systematic name: (RS-2-[phenyl(phenylmethylamino]ethyl 5-(5,5-dimethyl-2-oxo-1,3-dioxa-2λ5-phosphacyclohex-2-yl-2,6-dimethyl-4-(3-nitrophenyl-1,4-dihydropyridine-3-carboxylate acetone hemisolvate}, contains one R-efonidipine molecule, one S-efonidipine molecule and half of a solvate acetone molecule. In both efonidipine molecules, the six-membered rings of the dioxaphosphinanyl moieties display a chair conformation and the dihydropyridine rings display a flattened boat conformation. In the crystal, N—H...O, C—H...O hydrogen bonds and weak C—H...π interactions link the molecules into a three-dimensional supramolecular structure. A solvent-accessible void of 199 Å3 is found in the structure; the contribution of the heavily disordered solvate molecule was suppressed by use of the SQUEEZE routine in PLATON [Spek (2015. Acta Cryst. C71, 9–18].

  14. (4′-Phenyl-2,2′:6′,2′′-terpyridine-κ3N,N′,N′′bis(thiocyanato-κNzinc(II unknown solvate

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    An-ran Wang

    2016-11-01

    Full Text Available The title compound, [Zn(NCS2(C21H15N3], crystallizes with three independent complex molecules in the asymmetric unit. In each complex molecule, the ZnII atom is coordinated by three N atoms of a 4′-phenyl-2,2′:6′,2′′-terpyridine ligand, and by the N atoms of two NCS− anions. The ZnII atoms are therefore five-coordinate, ZnN5, with distorted square-pyramidal geometries. In the crystal, the three independent molecules are linked by a series of offset π–π interactions [intercentroid distances vary between 3.680 (5 and 3.791 (5 Å], forming columns along the a-axis direction. The columns are linked via C—H...S interactions, forming a fence-like arrangement parallel to the ab plane. A small region of disordered electron density was corrected for using the SQUEEZE routine in PLATON [Spek (2015. Acta Cryst. C71, 9–18], but the formula mass and unit-cell characteristics were not taken into account during the refinement.

  15. Bis(2-amino-1,3-benzothiazole-κN3dichloridozinc(II ethanol hemisolvate

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    Young-Inn Kim

    2012-02-01

    Full Text Available In the title compound, [ZnCl2(C7H6N2S2]·0.5CH3CH2OH, the ZnII atom is coordinated by two N atoms of two 2-aminobenzothiazole ligands and two Cl atoms within a distorted tetrahedral geometry. The dihedral angle between the N/Zn/N and Cl/Zn/Cl planes is 86.22 (7°. The benzothiazole molecules are almost perpendicular to each other, forming a dihedral angle of 80.20 (8°. The molecular structure is stabilized by intramolecular N—H...Cl hydrogen bonds. In the crystal, intermolecular N—H...Cl hydrogen bonds link the molecules into a three-dimensional network. The SQUEEZE procedure in PLATON [Spek (2009. Acta Cryst. D65, 148–155] was used to model a disordered ethanol solvent molecule; the calculated unit-cell data allow for the presence of half of this molecule in the asymmetric unit.

  16. Crystal structure of 4′-allyl-4,5,6,7,2′,7′-hexachlorofluorescein allyl ester unknown solvate

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    Lili Wang

    2018-01-01

    Full Text Available In the title compound, 4′-allyl-4,5,6,7,2′,7′-hexachlorofluorescein allyl ester {systematic name: prop-2-en-1-yl 2,3,4,5-tetrachloro-6-[2,7-dichloro-6-hydroxy-3-oxo-4-(prop-2-en-1-yl-3H-xanthen-9-yl]benzoate}, C26H14Cl6O5, accompanied by unknown solvate molecules, the dihedral angle between the xanthene ring system (r.m.s. deviation = 0.046 Å and the pentasubstituted benzene ring is 71.67 (9°. Both allyl groups are disordered over two sets of sites in statistical ratios. The scattering contributions of the disordered solvent molecules (both Ph2O and CHCl3, as identified by NMR were removed with the PLATON SQUEEZE algorithm [Spek (2015. Acta Cryst. C71, 9–18]. In the crystal, tetrameric supramolecular aggregates linked by O—H...O hydrogen bonds occur; these further interact with neighboring aggregates through C—Cl...π interactions arising from the benzene rings, forming infinite two-dimensional sheets. Each C6Cl4 ring shifts in the direction perpendicular to the two-dimensional sheet, exhibiting a helical chain in which every C6Cl4 ring is utilized as both a donor and an acceptor of Cl...π contacts. Thus, these two-dimensional sheets pack in a helical fashion, constructing a three-dimensional network.

  17. (Acetonitrile{2-[bis(pyridin-2-ylmethyl-κ2Namino-κN]-N-(2,6-dimethylphenylacetamide-κO}(perchlorato-κOzinc (acetonitrile{2-[bis(pyridin-2-ylmethyl-κ2Namino-κN]-N-(2,6-dimethylphenylacetamide-κO}zinc tris(perchlorate

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    Ove Alexander Høgmoen Åstrand

    2013-02-01

    Full Text Available In the title salt, [Zn(C22H24N4O(CH3CN][Zn(ClO4(C22H24N4O(CH3CN](ClO43, two differently coordinated zinc cations occur. In the first complex, the metal ion is coordinated by the N,N′,N′′,O-tetradentate acetamide ligand and an acetonitrile N atom, generating an approximate trigonal–bipyramidal coordination geometry, with the O atom in an equatorial site and the acetonitrile N atom in an axial site. In the second complex ion, a perchlorate ion is also bonded to the zinc ion, generating a distorted trans-ZnO2N4 octahedron. Of the uncoordinating perchlorate ions, one lies on a crystallographic twofold axis and one lies close to a twofold axis and has a site occupancy of 0.5. N—H...O and N—H...(O,O hydrogen bonds are observed in the crystal. Disordered solvent molecules occupy about 11% of the unit-cell volume; their contribution to the scattering was removed with the SQUEEZE routine of the PLATON program [Spek (2009. Acta Cryst. D65, 148–155.].

  18. Crystal structure of an unknown solvate of bis(tetra-n-butylammonium [N,N′-(4-trifluoromethyl-1,2-phenylenebis(oxamato-κ4O,N,N′,O′]nickelate(II

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    François Eya'ane Meva

    2015-06-01

    Full Text Available In the title compound, [N(C4H94]2[Ni(C11H3F3N2O6] or [N(n-Bu4]2[Ni(topbo] [n-Bu = n-butyl and topbo = 4-trifluoromethyl-1,2-phenylenebis(oxamate], the Ni2+ cation is coordinated by two deprotonated amido N atoms and two carboxylate O atoms, setting up a slightly distorted square-planar coordination environment. The [Ni(topbo]2− anion lies on a twofold rotation axis. Due to an incompatibility with the point-group symmetry of the complete molecule, orientational disorder of the CF3 group is observed. The tetrahedral ammonium cations and the anion are linked by weak intermolecular C—H...O and C—H...F hydrogen-bonding interactions into a three-dimensional network. A region of electron density was treated with the SQUEEZE procedure in PLATON [Spek (2015. Acta Cryst. C71, 9–18] following unsuccessful attempts to model it as plausible solvent molecule(s. The given chemical formula and other crystal data do not take into account the unknown solvent molecule.

  19. V1.42In1.83Mo15Se19

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    Michel Potel

    2010-10-01

    Full Text Available The structure of the title compound, vanadium indium pentadecamolybdenum nonadecaselenide, V1.42In1.83Mo15Se19, is isotypic with In2.9Mo15Se19 [Grüttner et al. (1979. Acta Cryst. B35, 285–292]. It is characterized by two cluster units Mo6Sei8Sea6 and Mo9Sei11Sea6 (where i represents inner and a apical atoms that are present in a 1:1 ratio. The cluster units are centered at Wyckoff positions 2b and 2c and have point-group symmetry overline{3} and overline{6}, respectively. The clusters are interconnected through additional Mo—Se bonds. In the title compound, the V3+ cations replace the trivalent indium atoms present in In2.9Mo15Se19, and a deficiency is observed on the monovalent indium site. One Mo, one Se and the V atom are situated on mirror planes, and two other Se atoms and the In atom are situated on threefold rotation axes.

  20. Crystal structure of bis(azido-κNbis[2,5-bis(pyridin-2-yl-1,3,4-thiadiazole-κ2N2,N3]cobalt(II

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    Abdelhakim Laachir

    2015-05-01

    Full Text Available In the mononuclear title complex, [Co(N32(C12H8N4S2], the cobalt(II atom is located on an inversion centre and displays an axially weakly compressed octahedral coordination geometry. The equatorial positions are occupied by the N atoms of two 2,5-bis(pyridin-2-yl-1,3,4-thiadiazole ligands, whereas the axial positions are occupied by N atoms of the azide anions. The thiadiazole and pyridine rings linked to the metal are almost coplanar, with a maximum deviation from the mean plane of 0.0273 (16 Å. The cohesion of the crystal is ensured by weak C—H...N hydrogen bonds and by π–π interactions between pyridine rings [intercentroid distance = 3.6356 (11 Å], forming a layered arrangement parallel to (001. The structure of the title compound is isotypic with that of the analogous nickel(II complex [Laachir et al. (2013. Acta Cryst. E69, m351–m352].

  1. Poly[di-μ2-acetato-κ4O:O′-μ3-thiourea-κ3S:S:S-lead(II]: a redetermination

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    Hafid Zouihri

    2016-12-01

    Full Text Available The structure of the title polymeric lead(II thiourea complex, [Pb(CH3O2{SC(NH22}]n, has been redetermined at significantly higher precision using diffractometer data at 100 K. The previous determination used data obtained from multiple-film integrated Weissenberg photographs [Nardelli et al. (1960. Acta Cryst. 13, 898–904]. The main difference between the two models is in the precision of the bond lengths, angles and cell parameters. In the crystal, the eight-coordinate PbII atom is chelated by two carboxylate groups and bridged by three S atoms from thiourea ligands. The coordination sphere is completed by an O atom from a third carboxylate group, the second O atom of which binds to a neighbouring PbII atom, forming a polymeric chain that runs the a axis. Two of these chains are related by centres of symmetry. Intermolecular hydrogen bonds connect neighbouring chains to one another, generating a three-dimensional network.

  2. Molecular architecture of the nucleoprotein C-terminal domain from the Ebola and Marburg viruses.

    Science.gov (United States)

    Baker, Laura E; Ellena, Jeffrey F; Handing, Katarzyna B; Derewenda, Urszula; Utepbergenov, Darkhan; Engel, Daniel A; Derewenda, Zygmunt S

    2016-01-01

    The Filoviridae family of negative-sense, single-stranded RNA (ssRNA) viruses is comprised of two species of Marburgvirus (MARV and RAVV) and five species of Ebolavirus, i.e. Zaire (EBOV), Reston (RESTV), Sudan (SUDV), Taï Forest (TAFV) and Bundibugyo (BDBV). In each of these viruses the ssRNA encodes seven distinct proteins. One of them, the nucleoprotein (NP), is the most abundant viral protein in the infected cell and within the viral nucleocapsid. It is tightly associated with the viral RNA in the nucleocapsid, and during the lifecycle of the virus is essential for transcription, RNA replication, genome packaging and nucleocapsid assembly prior to membrane encapsulation. The structure of the unique C-terminal globular domain of the NP from EBOV has recently been determined and shown to be structurally unrelated to any other known protein [Dziubańska et al. (2014), Acta Cryst. D70, 2420-2429]. In this paper, a study of the C-terminal domains from the NP from the remaining four species of Ebolavirus, as well as from the MARV strain of Marburgvirus, is reported. As expected, the crystal structures of the BDBV and TAFV proteins show high structural similarity to that from EBOV, while the MARV protein behaves like a molten globule with a core residual structure that is significantly different from that of the EBOV protein.

  3. Dynamic quantum crystallography: lattice-dynamical models refined against diffraction data. II. Applications to L-alanine, naphthalene and xylitol.

    Science.gov (United States)

    Hoser, Anna A; Madsen, Anders Ø

    2017-03-01

    In the first paper of this series [Hoser & Madsen (2016). Acta Cryst. A72, 206-214], a new approach was introduced which enables the refinement of frequencies of normal modes obtained from ab initio periodic computations against single-crystal diffraction data. In this contribution, the performance of this approach is tested by refinement against data in the temperature range from 23 to 205 K on the molecular crystals of L-alanine, naphthalene and xylitol. The models, which are lattice-dynamical models derived at the Γ point of the Brillouin zone, are able to describe the atomic vibrations of L-alanine and naphthalene to a level where the residual densities are similar to those obtained from the independent atom model. For the more flexible molecule xylitol, larger deviations are found. Hydrogen ADPs (anisotropic displacement parameters) derived from the models are in similar or better agreement with neutron diffraction results than ADPs obtained by other procedures. The heat capacity calculated after normal mode refinement for naphthalene is in reasonable agreement with the heat capacity obtained from calorimetric measurements (to less than 1 cal mol -1  K -1 below 300 K), with deviations at higher temperatures indicating anharmonicity. Standard uncertainties and correlation of the refined parameters have been derived based on a Monte Carlo procedure. The uncertainties are quite small and probably underestimated.

  4. Difference in the structures of alanine tri- and tetra-peptides with antiparallel β-sheet assessed by X-ray diffraction, solid-state NMR and chemical shift calculations by GIPAW.

    Science.gov (United States)

    Asakura, Tetsuo; Yazawa, Koji; Horiguchi, Kumiko; Suzuki, Furitsu; Nishiyama, Yusuke; Nishimura, Katsuyuki; Kaji, Hironori

    2014-01-01

    Alanine oligomers provide a key structure for silk fibers from spider and wild silkworms.We report on structural analysis of L-alanyl-L-alanyl-L-alanyl-L-alanine (Ala)4 with anti-parallel (AP) β-structures using X-ray and solid-state NMR. All of the Ala residues in the (Ala)4 are in equivalent positions, whereas for alanine trimer (Ala)3 there are two alternative locations in a unit cell as reported previously (Fawcett and Camerman, Acta Cryst., 1975, 31, 658-665). (Ala)4 with AP β-structure is more stable than AP-(Ala)3 due to formation of the stronger hydrogen bonds. The intermolecular structure of (Ala)4 is also different from polyalanine fiber structure, indicating that the interchain arrangement of AP β-structure changes with increasing alanine sequencelength. Furthermore the precise (1)H positions, which are usually inaccesible by X-ray diffraction method, are determined by high resolution (1)H solid state NMR combined with the chemical shift calculations by the gauge-including projector augmented wave method. Copyright © 2013 Wiley Periodicals, Inc.

  5. (4,4′-Dimethoxy-2,2′-bipyridine-κ2N,N′bis[2-(pyridin-2-ylphenyl-κC1]iridium(III hexafluoridophosphate unknown solvate

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    Yano Natsumi

    2016-03-01

    Full Text Available The asymmetric unit of the title complex, [Ir(C11H8N2(C12H12N2O2]PF6, comprises a [Ir(ppy2(diMeO-bpy]+ cation (Hppy = 2-phenylpyridine and diMeO-bpy = 4,4′-dimethoxy-2,2′-bipyridine and a PF6− anion. The IrIII atom is coordinated by two anionic ppy− ligands, each coordinating in a C^N cyclometalated mode, and one neutral diMeO-bpy ligand, leading to a distorted octahedral geometry defined by a cis-C2N4 donor set. Intermolecular C—F...H contacts lead to a three-dimensional architecture that define columns parallel to a. Unknown disordered solvent molecules reside in these columns with the electron density being treated with SQUEEZE [Spek (2015. Acta Cryst. C71, 9–18]. The unit-cell data do not reflect the presence of the unresolved solvent.

  6. Poly[μ-aqua-diaqua(μ2-pyrazine-2,3-dicarboxylatodilithium(I

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    Kutalmis Guven

    2009-12-01

    Full Text Available The asymmetric unit of the title compound, [Li2(C6H2N2O4(H2O3]n, consists of two independent Li+ cations, one pyrazine-2,3-dicarboxylate dianion and three water molecules. One of the Li+ cations has a distorted tetrahedral geometry, coordinated by one of the carboxylate O atoms of the pyrazine-2,3-dicarboxylate ligand and three O atoms from three water molecules, whereas the other Li+ cation has a distorted trigonal-bipyramidal geometry, coordinated by a carboxylate O atom of a symmetry-related pyrazine-2,3-dicarboxylate ligand, two water molecules and a chelating pyrazine-2,3-dicarboxylate ligand (by utilizing both N and O atoms of an adjacent molecule. The synthesis of a hydrated polymeric dinuclear lithium complex formed with two pyrazine-2,3-dicarboxylic acid ligands has been reported previously [Tombul et al. (2008a. Acta Cryst. E64, m491–m492]. By comparision to the complex reported here, the dinuclear complex formed with two pyrazine-2,3-dicarboxylic acid ligands differs in the coordination geometry of both Li atoms. The crystal structure further features O—H...O and O—H...N hydrogen-bonding interactions involving the water molecules and carboxylate O atoms.

  7. Evaluation of macromolecular electron-density map quality using the correlation of local r.m.s. density

    International Nuclear Information System (INIS)

    Terwilliger, Thomas C.; Berendzen, Joel

    1999-01-01

    The correlation of local r.m.s. density is shown to be a good measure of the presence of distinct solvent and macromolecule regions in macromolecular electron-density maps. It has recently been shown that the standard deviation of local r.m.s. electron density is a good indicator of the presence of distinct regions of solvent and protein in macromolecular electron-density maps [Terwilliger & Berendzen (1999 ▶). Acta Cryst. D55, 501–505]. Here, it is demonstrated that a complementary measure, the correlation of local r.m.s. density in adjacent regions on the unit cell, is also a good measure of the presence of distinct solvent and protein regions. The correlation of local r.m.s. density is essentially a measure of how contiguous the solvent (and protein) regions are in the electron-density map. This statistic can be calculated in real space or in reciprocal space and has potential uses in evaluation of heavy-atom solutions in the MIR and MAD methods as well as for evaluation of trial phase sets in ab initio phasing procedures

  8. A new crystal modification of diammonium hydrogen phosphate, (NH42(HPO4

    Directory of Open Access Journals (Sweden)

    Bernhard Spingler

    2010-04-01

    Full Text Available The addition of hexafluoridophosphate salts (ammonium, silver, thallium or potassium is usually used to precipitate complex cations from aqueous solutions. It has long been known that PF6− is sensitive towards hydrolysis under acidic conditions [Gebala & Jones (1969. J. Inorg. Nucl. Chem. 31, 771–776; Plakhotnyk et al. (2005. J. Fluorine Chem. 126, 27–31]. During the course of our investigation into coinage metal complexes of diphosphine ligands, we used ammonium hexafluoridophosphate in order to crystallize [Ag(diphosphine2]PF6 complexes. From these solutions we always obtained needle-like crystals which turned out to be the title compound, 2NH4+·HPO42−. It was received as the hydrolysis product of NH4PF6. The crystals are a new modification of diammonium hydrogen phosphate. In contrast to the previously published polymorph [Khan et al. (1972. Acta Cryst. B28, 2065–2069], Z′ of the title compound is 2. In the new modification of the title compound, there are eight molecules of (NH42(HPO4 in the unit cell. The structure consists of PO3OH and NH4 tetrahedra, held together by O—H...O and N—H...O hydrogen bonds.

  9. On the application of the expected log-likelihood gain to decision making in molecular replacement.

    Science.gov (United States)

    Oeffner, Robert D; Afonine, Pavel V; Millán, Claudia; Sammito, Massimo; Usón, Isabel; Read, Randy J; McCoy, Airlie J

    2018-04-01

    Molecular-replacement phasing of macromolecular crystal structures is often fast, but if a molecular-replacement solution is not immediately obtained the crystallographer must judge whether to pursue molecular replacement or to attempt experimental phasing as the quickest path to structure solution. The introduction of the expected log-likelihood gain [eLLG; McCoy et al. (2017), Proc. Natl Acad. Sci. USA, 114, 3637-3641] has given the crystallographer a powerful new tool to aid in making this decision. The eLLG is the log-likelihood gain on intensity [LLGI; Read & McCoy (2016), Acta Cryst. D72, 375-387] expected from a correctly placed model. It is calculated as a sum over the reflections of a function dependent on the fraction of the scattering for which the model accounts, the estimated model coordinate error and the measurement errors in the data. It is shown how the eLLG may be used to answer the question `can I solve my structure by molecular replacement?'. However, this is only the most obvious of the applications of the eLLG. It is also discussed how the eLLG may be used to determine the search order and minimal data requirements for obtaining a molecular-replacement solution using a given model, and for decision making in fragment-based molecular replacement, single-atom molecular replacement and likelihood-guided model pruning.

  10. 4-(3-Chlorophenyl-1-(3-chloropropylpiperazin-1-ium chloride redetermined at 100 K

    Directory of Open Access Journals (Sweden)

    Muzzaffar Ahmad Bhat

    2016-02-01

    Full Text Available The crystal structure of the title salt, C13H19Cl2N2+·Cl−, has been reported previously [Homrighausen & Krause Bauer (2002. Acta Cryst. E58, o1395–o1396] based on room-temperature data, where it was found to contain a disordered chloropropyl group. We now present the structure at 100 K in which the chloropropyl group is ordered. The piperazine ring adopts a chair conformation with the exocyclic N—C bonds in equatorial orientations. The dihedral angle between the piperazine ring (all atoms and the benzene ring is 28.47 (5°. The chloropropyl group has an extended conformation [N—C—C—C = −177.25 (8 ° and C—C—C—Cl = 174.23 (7°]. In the crystal, charge-assisted N—H...Cl hydrogen bonds link the cation and anion into ion pairs. Numerous weak C—H...Cl interactions link the ion pairs into a three-dimensional network. Short Cl...Cl contacts [3.2419 (4 Å] are also observed.

  11. Crystal structure of a new monoclinic polymorph of N-(4-methylphenyl-3-nitropyridin-2-amine

    Directory of Open Access Journals (Sweden)

    Aina Mardia Akhmad Aznan

    2014-08-01

    Full Text Available The title compound, C12H11N3O2, is a second monoclinic polymorph (P21, with Z′ = 4 of the previously reported monoclinic (P21/c, with Z′ = 2 form [Akhmad Aznan et al. (2010. Acta Cryst. E66, o2400]. Four independent molecules comprise the asymmetric unit, which have the common features of a syn disposition of the pyridine N atom and the toluene ring, and an intramolecular amine–nitro N—H...O hydrogen bond. The differences between molecules relate to the dihedral angles between the rings which range from 2.92 (19 to 26.24 (19°. The geometry-optimized structure [B3LYP level of theory and 6–311 g+(d,p basis set] has the same features except that the entire molecule is planar. In the crystal, the three-dimensional architecture is consolidated by a combination of C—H...O, C—H...π, nitro-N—O...π and π–π interactions [inter-centroid distances = 3.649 (2–3.916 (2 Å].

  12. Crystal structure of a new monoclinic polymorph of N-(4-methyl-phen-yl)-3-nitro-pyridin-2-amine.

    Science.gov (United States)

    Aznan, Aina Mardia Akhmad; Abdullah, Zanariah; Lee, Vannajan Sanghiran; Tiekink, Edward R T

    2014-08-01

    The title compound, C12H11N3O2, is a second monoclinic polymorph (P21, with Z' = 4) of the previously reported monoclinic (P21/c, with Z' = 2) form [Akhmad Aznan et al. (2010 ▶). Acta Cryst. E66, o2400]. Four independent mol-ecules comprise the asymmetric unit, which have the common features of a syn disposition of the pyridine N atom and the toluene ring, and an intra-molecular amine-nitro N-H⋯O hydrogen bond. The differences between mol-ecules relate to the dihedral angles between the rings which range from 2.92 (19) to 26.24 (19)°. The geometry-optimized structure [B3LYP level of theory and 6-311 g+(d,p) basis set] has the same features except that the entire mol-ecule is planar. In the crystal, the three-dimensional architecture is consolidated by a combination of C-H⋯O, C-H⋯π, nitro-N-O⋯π and π-π inter-actions [inter-centroid distances = 3.649 (2)-3.916 (2) Å].

  13. Assessment of somaclonal variation in somatic embryo-derived plants of yacon [Smallanthus sonchifolius (Poepp. and Endl.) H. Robinson] using inter simple sequence repeat analysis and flow cytometry

    Czech Academy of Sciences Publication Activity Database

    Viehmannová, I.; Bortlová, Z.; Vítámvás, J.; Čepková, P.; Eliášová, Kateřina; Svobodová, E.; Trávníčková, M.

    2014-01-01

    Roč. 17, č. 2 (2014) ISSN 0717-3458 Institutional support: RVO:61389030 Keywords : DNA polymorphism * Molecular markers * Ploidy level Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 0.681, year: 2014

  14. Constituents of the arial parts of Eupatorium odoratum L. ( Syn. Chromolaena odorata) (L.) R.M. King And H Robinson), family compositae-grown in Vietnam

    NARCIS (Netherlands)

    Trang, N.T.D.; Phuong, L.V.N.; Dung, N.X.; Leclercq, P.A.; Wanner, M.J.; Koomen, C.J.; Fokkens, R.

    1994-01-01

    Eupatorium odoratum (L.), Family Compositae grows very fast in various places of the world, especially in tropical countries. This plant belonges to one of the worst plants. Some applications of this plant used for treatment of diseases such as disrrhoea, dysentery and scabies have been found in

  15. The life and adventures of an eight-legged castaway: Colonization and diversification of Philisca ghost spiders on Robinson Crusoe Island (Araneae, Anyphaenidae).

    Science.gov (United States)

    Soto, Eduardo M; Labarque, Facundo M; Ceccarelli, F Sara; Arnedo, Miquel A; Pizarro-Araya, Jaime; Ramírez, Martín J

    2017-02-01

    Oceanic archipelagoes, by their young origin and isolation, provide privileged settings to study the origin and diversification of species. Here, we study the anyphaenid spider genus Philisca, endemic to the Valdivian temperate rainforest, which includes species living both on the mainland as well as on the Robison Crusoe Island in the Juan Fernández archipelago. Anyphaenids, as many spiders, are potentially good colonizers due their ability for ballooning, an airborne dispersal mediated by strands of silk that are caught in the wind. We use a molecular approach to estimate both the phylogenetic relationships and the timeframe of species diversification of Philisca, with the aim to infer its evolutionary history. We further estimate the rates of speciation on both the insular and continental Philisca species and score the microhabitat used by each species and their sizes as a proxy to evaluate ecological niche diversification within the island. Most analyses support the monophyly of Philisca, with the exclusion of Philisca tripunctata. Our results reveal colonization from a single lineage that postdated the origin of the island, followed by rapid (∼2Ma) diversification. The ancestral microhabitat was most likely leaf-dwelling but we identify two independent microhabitat shifts. Our data provides evidence that Philisca has undergone an adaptive radiation on the Robison Crusoe Island. Copyright © 2016 Elsevier Inc. All rights reserved.

  16. Uji Efektifitas Beberapa Konsentrasi Larutan Daun Kirinyuh (Choromolaena odorata (L. King & Robinson Terhadap Ulat Tritip (Plutella xylostella L Pada Tanaman Kubis (Brassica oleraceae var. capitata Di Laboratorium

    Directory of Open Access Journals (Sweden)

    Firdaus Firdaus

    2016-12-01

    Full Text Available Ulat tritip, Plutella xylostella, merupakan hama cosmopolitan yang memiliki kecendrungan tinggi untuk resisten terhadap insektisida konvensional.  Oleh karenanya perlu terus dikaji bahan alternative yang berpotensi insektisidal untuk hama ini.  Kirinyuh, Chromolaena odorata, merupakan gulma invasive yang memiliki kandungan senyawa dengan  potensi insektisidal.   Penelitian ini  telah dilaksanakan di Laboratorium Hama dan Penyakit Fakultas Pertanian Universitas Islam Riau, Jalan Kaharudin Nasution, Kelurahan Simpang Tiga, Kecamatan Bukit Raya, Pekanbaru KM 11; dengan tujuan untuk mengetahui pengaruh interaksi konsentrasi filtrate daun kirinyuh dengan dua cara aplikasi (metoda tetes/topical dan metoda celup daun/pakan. Rancangan yang digunakan adalah rancangan acak lengkap ( RAL faktorial, dimana faktor pertama adalah berbagai tingkat konsentrasi larutan daun kirinyuh ( D terdiri dari 5 taraf perlakuan yaitu : kontrol, 150 gr/liter air, 300 gr/liter air, 450 gr/liter air dan 600 gr/liter air dan faktor kedua adalah cara aplikasi ( A yang terdiri dari 2 taraf perlakuan dimana  cara pertama yaitu larutan yang ditetesi secara topikal ketubuh larva dan bahan makan larva yang dicelupkan kedalam larutan. Parameter yang diamati dalam penelitian ini adalah : persentase mortalitas larva Plutella xylostella, persentase larva menjadi pupa, persentase pupa menjadi imago dan dampak perlakuan terhadap progeni.Dari hasil pengamatan menunjukkan bahwa pemberian berbagai tingkat konsentrasi filtrat kirinyuh dan cara aplikasi larutan daun kirinyuh secara interaksi berpengaruh secara nyata terhadap parameter pengamatan persentase mortalitas larva, persentase larva menjadi pupa, dan persentase pupa menjadi imago. Kombinasi perlakuan terbaik yaitu pada konsentrasi tertinggi yang di uji 600 g bahan per liter air dan metode celup daun.  Sedangkan perlakuan utama tingkat konsentrasi larutan kirinyuh berpengaruh nyata terhadap seluruh parameter pengamatan. Pengaruh konsentrasi semakin besar dengan semakin tinggi konsentrasi. Sedangkan untuk perlakuan utama cara aplikasi larutan kirinyuh berpengaruh nyata terhadap parameter pengamatan persentase mortalitas larva, persentase larva menjadi pupa, dan persentase pupa menjadi imago, dengan perlakuan terbaik dengan cara metoda celup daun/pakan.

  17. Aerial radiological survey of the H.B. Robinson steam electric plant and surrounding area, Hartsville, South Carolina. Date of survey: June 1985

    International Nuclear Information System (INIS)

    1986-04-01

    The survey covered a 64-square-kilometer (25-square-mile) area centered on the Plant. The highest radiation exposure rates, up to a maximum of 220 microroentgens per hour (μR/h), were inferred from the data measured directly over the Plant. This detected radiation was due to the presence of cobalt-58, cobalt-60, and cesium-137, which was consistent with normal Plant operations. A single offsite anomaly was detected within the survey area this anomaly, which was approximately 1.3 kilometers (0.8 miles) northwest of the Plant, was the site of the Plant's coal-fired generating station's ash settling pond. This pond, which contained the coal's ash and slag residue, revealed varying concentrations of naturally-occurring radioactive materials. All the radionuclides of the uranium and thorium decay chains and radioactive potassium were found. For the majority of the survey area, the inferred radiation exposure rate levels varied from 4 to 12μR/h. Higher exposure rate levels (12 to 25 μR/h) due to increased concentrations of thorium were prevalent over the southern and northwestern portions of the survey area. The reported exposure rate values included an estimated cosmic ray contribution of 3.7 μR/h. Ground-based measurements, conducted concurrently with the aerial survey, were compared to the inferred aerial results. Pressurized ionization chamber readings and a group of soil samples were acquired at several locations within the survey area and at two of the three ground-based locations used in 1973 for a previous aerial survey. The exposure rate values obtained from those measurements made within the current aerial survey boundaries were in agreement with the corresponding inferred aerial data results. No evidence of any radioactive contamination was inferred from the 1985 aerial survey data

  18. A new equation of correction of the specific volume of the hydrocarbons C1 to C8 liquids for the equation of state of Peng-Robinson

    International Nuclear Information System (INIS)

    Hoyos Madrigal, Bibian

    2000-01-01

    A new generalized correction equation for specific volume of hydrocarbon pure liquids is proposed. Which can be used in a wide temperature range and that do not require additional parameters for each substance. The equation was developed for the normal hydrocarbon series from methane to octane and the obtained results applied to other substances are analysed. A comparison is also made with the equation proposed by Peneloux et al. (1982) resulting. In all cases, in a better performance of the equation proposed in this work

  19. The transformation of amorphous calcium carbonate, ACC, to crystalline phases as function of time and temperature.

    Science.gov (United States)

    Gies, Hermann; Happel, Marian; Niedermayr, Andrea; Immenhauser, Adrian

    2017-04-01

    Acta 174, 180-195(2016) DJ. Tobler et al., Cryst. Growth Des. 16, 4500-4508(2016)

  20. Actas del Simposio-Taller sobre estrategias y herramientas para el aprendizaje y la evaluación: Jenui 2013: Castellón, 9 de julio de 2013

    OpenAIRE

    Marqués Andrés, Mercedes; Badía Contelles, José Manuel; Barrachina Mir, Sergio; López, David; Vaquerizo, Belén

    2013-01-01

    El curso 2012-2013 se ha puesto en marcha la asignatura Dirección estratégica de las tecnologías de la información perteneciente al Máster Universitario en Ingeniería Informática de la Escuela Politécnica Superior de la Universidad de Alicante. Basándonos en el principio predicar con el ejemplo, se utilizan las técnicas y los principios de la dirección estratégica y se aplican al diseño y la ejecución de la propuesta docente de la asignatura. Además, en su diseño se han utilizado una diversid...

  1. Relationships between body mass index and short-circuit current in human duodenal and colonic mucosal biopsies. Osbak PS, Bindslev N, Hansen MB. Acta Physiol (Oxf). 2011 Jan;201(1):47-53

    DEFF Research Database (Denmark)

    Osbak, Philip Samuel; Bindslev, Niels; Berner-Hansen, Mark

    2011-01-01

    Aim: Retrospectively, to investigate the relationship between body mass index (BMI) and basal electrogenic transport as measured by short-circuit current (SCC) in human duodenal and colonic mucosal biopsies. Methods: The study included biopsies from mucosa of normal appearance in the sigmoid colon...... and >25 kg m)2). Statistical significance was assessed by the unpaired t-test or Wilcoxon rank-sum test. Correlation coefficients were calculated by Pearson product moment correlation. Results: In colonic biopsies, basal SCC (mean standard deviation) was significantly higher in 59 biopsies from 30...

  2. Actas de la 4th mesa redonda sobre investigacion en "Lenguas Extranjeras" en la Universidad Autonoma Metropolitana 1996. (Proceedings from the 4th Roundtable on Investigation in Foreign Languages in the Autonomous Metropolitan University 1996).

    Science.gov (United States)

    Zoreda, Margaret Lee, Comp.; Diop, Mamoudou Si, Comp.; Vivaldo Lima, Javier, Comp.

    The articles included in this volume were selected as exemplary papers from the conference in Mexico. The goal of the forum was to provide an opportunity for researchers from the three branches of the Universidad Autonoma Metropolitana (UAM) to meet and discuss research projects currently in progress at the university. The works presented here…

  3. Corrigendum to "Synthesis and spectral characterization of new homologous 1,3,5-triaryl-2-pyrazolines: Influence of alkyloxy chain length on fluorescence" [Spectrochim. Acta Part A: Mol. Biomol. Spectrosc. 133 (2014) 182-189

    Science.gov (United States)

    Abbas, Asghar; Hussain, Safdar; Hafeez, Noureen; Naseer, Muhammad Moazzam

    2015-03-01

    The authors regret to inform that the affiliation of one of the authors, namely, Noureen Hafeez has been written as Department of Forensic Medicine & Toxicology, Rawalpindi Institute of Health Sciences (RIHS), Bahria University, Islamabad, Pakistan in the published article. The correct address is shown above.

  4. Coping with Social Change: Programs That Work. Proceedings of a Conference (Acapulco, Mexico, June 1989) = Como enfrentarse al cambio social: programas eficaces. Actas de uno Conferencia (Acapulco, Mexico, Junio de 1989).

    Science.gov (United States)

    Hoskins, Irene, Ed.

    Written in English and Spanish, this document contains the proceedings of the 14th International Congress of Gerontology on concerns about the impact of rapid social change on the well-being of older women and families in Latin American and the Caribbean and about effective programs that address the needs of the older populations. The first…

  5. Experimental evidence for two distinct deeply supercooled liquid states of water – Response to “Comment on ‘Water's second glass transition”’, by G.P. Johari, Thermochim. Acta (2015)

    Energy Technology Data Exchange (ETDEWEB)

    Stern, J.; Seidl, M. [Institute of Physical Chemistry, University of Innsbruck, 6020 Innsbruck (Austria); Gainaru, C. [Fakultät Physik, Technische Universität Dortmund, 44221 Dortmund (Germany); Fuentes-Landete, V.; Amann-Winkel, K.; Handle, P.H. [Institute of Physical Chemistry, University of Innsbruck, 6020 Innsbruck (Austria); Köster, K.W.; Nelson, H. [Fakultät Physik, Technische Universität Dortmund, 44221 Dortmund (Germany); Böhmer, R., E-mail: roland.bohmer@tu-dortmund.de [Fakultät Physik, Technische Universität Dortmund, 44221 Dortmund (Germany); Loerting, T., E-mail: thomas.loerting@uibk.ac.at [Institute of Physical Chemistry, University of Innsbruck, 6020 Innsbruck (Austria)

    2015-10-10

    Highlights: • Two samples of amorphous ices quench-recovered from 140 K to 0.07 GPa are compared. • Calorimetry, X-ray diffraction, dielectric spectroscopy and volumetry are employed. • The two samples are distinct and cannot both be termed “pressure-densified glassy water”. • One route of preparation leads to high- (HDA), and the other to low-density amorphous ice (LDA). • Two distinct glass transitions are observed and interpreted to indicate two liquid H{sub 2}O phases. - Abstract: Recently, our earlier data which led us to conclude that deeply supercooled water displays a second glass transition (Amann-Winkel et al., 2013) was reinterpreted (Johari, 2015). In particular, the increase in heat capacity observed for high-density amorphous ice (HDA) samples at 116 K was reinterpreted to indicate sub-T{sub g} features of low-density amorphous ice's (LDA's) glass transition. We reply to the criticism in detail and report an experiment triggered by the comment on our work. This experiment unequivocally confirms our original interpretation of the observations and reinforces the case for water's second glass transition, its polyamorphism, and the observation of two distinct ultraviscous states of water differing by about 25% in density.

  6. Vārda brīvības un intelektuālā īpašuma aizsardzības līdzsvarošana ACTA

    OpenAIRE

    Bulzgis, Raivo

    2012-01-01

    Attīstoties intelektuālā īpašuma tiesībām un tā tiesiskajam regulējumam, tiek ierobežotas personu tiesības uz vārda brīvību. Ņemot vērā, ka tiek pieņemts jauns starptautiskais līgums šajā jomā, tad šī darba tēma ir aktuāla visā pasaulē. Darba mērķis ir noskaidrot, intelektuālā īpašuma un vārda brīvības robežas. Izvirzītā mērķa realizēšanai darba autors izvirzīja vairākus uzdevumus: izpētīt jēdzienus “vārda brīvība” un “intelektuālais īpašums”, analizēt šo jēdzienu robežas, kā arī iepazī...

  7. The corrected version of the article 'Physics in 1900' printed in Acta Physica Polonica B31, 179-196 (2000), Proceedings of the 26. Mazurian Lakes School of Physics 'Nuclear Physics at the Turn of the Century'

    International Nuclear Information System (INIS)

    Wroblewski, A.K.

    2000-01-01

    The state of physics in 1900 is reviewed by making use of the documents of that year, in particular the material of the 1 st International Congress of Physics. Contrary to simplified accounts which portrait 1900 as the year of revolutionary transition from classical to quantum physics it is shown that almost all physicists at that time were satisfied with classical physics and were actively enriching and expanding it. (author)

  8. Derechos Educacionales de los Padres: Una Explicacion de los Procedimientos de Seguridad para los Padres de Ninos con Discapacidades. Bajo la Clausula del Acta de Educacion para Individuos con Discapacidades (IDEA) y las Reglas para la Administracion del Acta de Educacion para Ninos Excepcionales (Educational Rights of Parents: An Explanation of Procedural Safeguards Available to Parents of Children with Disabilities. Under Provisions of the Individuals with Disabilities Education Act (IDEA) and the Rules for the Administration of the Exceptional Children's Educational Act [ECEA]).

    Science.gov (United States)

    Mountain Plains Regional Resource Center, Des Moines, IA.

    This pamphlet, in Spanish, describes Colorado parents' educational rights under federal and state special education rules and regulations. It addresses: (1) free appropriate public education and termination of services; (2) required prior notice to parents if there is a proposed change or refusal to change a child's special education program; (3)…

  9. FlexED8: the first member of a fast and flexible sample-changer family for macromolecular crystallography.

    Science.gov (United States)

    Papp, Gergely; Felisaz, Franck; Sorez, Clement; Lopez-Marrero, Marcos; Janocha, Robert; Manjasetty, Babu; Gobbo, Alexandre; Belrhali, Hassan; Bowler, Matthew W; Cipriani, Florent

    2017-10-01

    Automated sample changers are now standard equipment for modern macromolecular crystallography synchrotron beamlines. Nevertheless, most are only compatible with a single type of sample holder and puck. Recent work aimed at reducing sample-handling efforts and crystal-alignment times at beamlines has resulted in a new generation of compact and precise sample holders for cryocrystallography: miniSPINE and NewPin [see the companion paper by Papp et al. (2017, Acta Cryst., D73, 829-840)]. With full data collection now possible within seconds at most advanced beamlines, and future fourth-generation synchrotron sources promising to extract data in a few tens of milliseconds, the time taken to mount and centre a sample is rate-limiting. In this context, a versatile and fast sample changer, FlexED8, has been developed that is compatible with the highly successful SPINE sample holder and with the miniSPINE and NewPin sample holders. Based on a six-axis industrial robot, FlexED8 is equipped with a tool changer and includes a novel open sample-storage dewar with a built-in ice-filtering system. With seven versatile puck slots, it can hold up to 112 SPINE sample holders in uni-pucks, or 252 miniSPINE or NewPin sample holders, with 36 samples per puck. Additionally, a double gripper, compatible with the SPINE sample holders and uni-pucks, allows a reduction in the sample-exchange time from 40 s, the typical time with a standard single gripper, to less than 5 s. Computer vision-based sample-transfer monitoring, sophisticated error handling and automatic error-recovery procedures ensure high reliability. The FlexED8 sample changer has been successfully tested under real conditions on a beamline.

  10. Ionic network analysis of tectosilicates: the example of coesite at variable pressure.

    Science.gov (United States)

    Reifenberg, Melina; Thomas, Noel W

    2018-04-01

    The method of ionic network analysis [Thomas (2017). Acta Cryst. B73, 74-86] is extended to tectosilicates through the example of coesite, the high-pressure polymorph of SiO 2 . The structural refinements of Černok et al. [Z. Kristallogr. (2014), 229, 761-773] are taken as the starting point for applying the method. Its purpose is to predict the unit-cell parameters and atomic coordinates at (p-T-X) values in-between those of diffraction experiments. The essential development step for tectosilicates is to define a pseudocubic parameterization of the O 4 cages of the SiO 4 tetrahedra. The six parameters a PC , b PC , c PC , α PC , β PC and γ PC allow a full quantification of the tetrahedral structure, i.e. distortion and enclosed volume. Structural predictions for coesite require that two separate quasi-planar networks are defined, one for the silicon ions and the other for the O 4 cage midpoints. A set of parametric curves is used to describe the evolution with pressure of these networks and the pseudocubic parameters. These are derived by fitting to the crystallographic data. Application of the method to monoclinic feldspars and to quartz and cristobalite is discussed. Further, a novel two-parameter quantification of the degree of tetrahedral distortion is described. At pressures in excess of ca 20.45 GPa it is not possible to find a self-consistent solution to the parametric curves for coesite, pointing to the likelihood of a phase transition.

  11. A universal treatment of X-ray and neutron diffraction in crystals. II. Extinction

    International Nuclear Information System (INIS)

    Hu Huachen

    1997-01-01

    For pt.I see ibid., p.484-92, 1997. Based on the formalism for calculating the integrated reflection power ratio of a plane mosaic crystal by using three dimensionless parameters exact and universal expressions for the secondary-extinction factors in X-ray and neutron crystallography are developed that can be applied to reflections of all possible values of extinction factor, reflection symmetry and the absorption-to-scattering cross-section ratio of the crystal. The representation by three parameters gives a clear and definite physical meaning to the concept of extinction. The theory has been extended to treat the extinction of a spherical crystal, and the striking difference in the evaluated secondary-extinction factor between the equivalent single-plate and the exact method in the spherical-crystal treatment under θ B = 0 is explained. As a demonstration of the feasibility of using these expressions, the diffraction data for LiF and MgO crystal plates measured by Lawrence [Acta Cryst. (1972), A28, 400-404; (1973), A29, 208-210] are reanalyzed by this method. All the reflections including the strongest ones (Y o down to 0.026) are reanalyzed simultaneously with single-valued particle size and mosaic spread as fitting parameters and allowing for primary extinction if necessary. The results (R factor = 0.014 and 0.053 for LiF and MgO, respectively) are unprecedentedly good. Furthermore, in disagreement with Lawrence, the extinction of LiF is found to be of secondary type and in the case of MgO both primary and secondary extinction should be considered. The analysis also shows that the formula Y ∝ Y p Y s is valid only for very weak extinctions and that the Hamilton-Darwin equations are valid in a range much broader than previously anticipated. (orig.)

  12. Octakis(dimethyl sulfoxide-κOcerium(III μ6-oxido-dodeca-μ2-oxido-hexaoxidohexamolybdate(VI dimethyl sulfoxide tetrasolvate

    Directory of Open Access Journals (Sweden)

    Arbia Ben Khélifa

    2012-07-01

    Full Text Available The title complex, [Ce(C2H6OS8]2[Mo6O19]3·4C2H6OS, was obtained as a byproduct of the reaction of [(C4H94N]2[Mo6O19] with Ce(NO33·6H2O and phthalic acid in dimethylsulfoxide solution. The asymmetric unit consists of a complex [Ce(C2H6OS8]3+ cation, one and a half of the Lindqvist-type [Mo6O19]2− polyanions and two dimethylsulfoxide solvent molecules; the half polyanion lies on an inversion center. The Ce3+ ion is coordinated by eight dimethylsulfoxide ligands through the O atoms in the form of a distorted square antiprism. The Ce—O bond lengths range from 2.429 (6 to 2.550 (5 Å. The cohesion of the structure is ensured by S...O [3.115 (6, 3.242 (10 and 3.12 (3 Å], O...O [3.037 (10 Å] and C—H...O interactions between cations and anions. The S and C atoms of a dmso ligand are disordered over three sites in a 0.45:0.30:0.25 ratio. The dimethylsulfoxide solvent molecules are highly disordered and could not be modelled successfully; their contribution was therefore removed from the refinement using the SQUEEZE routine in PLATON [Spek (2009. Acta Cryst. D65, 148–155]. Potential solvent-accessible voids of 500.0 Å3 occur in the crystal structure.

  13. Crystal structures of three 4-substituted-2,2′-bipyridines synthesized by Sonogashira and Suzuki–Miyaura cross-coupling reactions

    Directory of Open Access Journals (Sweden)

    Thuy Luong Thi Thu

    2017-04-01

    Full Text Available Facile synthetic routes for three 4-substituted 2,2′-bipyridine derivatives, 4-[2-(4-methylphenylethynyl]-2,2′-bipyridine, C19H14N2, (I, 4-[2-(pyridin-3-ylethynyl]-2,2′-bipyridine, C17H11N3, (II, and 4-(indol-4-yl-2,2′-bipyridine, C18H13N3, (III, via Sonogashira and Suzuki–Miyaura cross-coupling reactions, respectively, are described. As indicated by X-ray analysis, the 2,2′-bipyridine core, the ethylene linkage and the substituents of (I and (II are almost planar [dihedral angles between the two ring systems: 8.98 (5 and 9.90 (6° for the two molecules of (I in the asymmetric unit and 2.66 (14° for (II], allowing π-conjugation. On the contrary, in (III, the indole substituent ring is rotated significantly out of the bipyridine plane [dihedral angle = 55.82 (3°], due to steric hindrance. The crystal packings of (I and (II are dominated by π–π interactions, resulting in layers of molecules parallel to (30-2 in (I and columns of molecules along the a axis in (II. The packing of (III exhibits zigzag chains of molecules along the c axis interacting through N—H...N hydrogen bonds and π–π interactions. The contributions of unknown disordered solvent molecules to the diffraction intensities in (II were removed with the SQUEEZE [Spek (2015. Acta Cryst. C71, 9–18] algorithm of PLATON. The given chemical formula and other crystal data do not take into account these solvent molecules.

  14. Distinguishing tautomerism in the crystal structure of (Z)-N-(5-ethyl-2,3-di-hydro-1,3,4-thiadiazol-2-ylidene) -4-methylbenzenesulfonamide using DFT-D calculations and {sup 13}C solid-state NMR

    Energy Technology Data Exchange (ETDEWEB)

    Li, Xiaozhou; Bond, Andrew D.; Johansson, Kristoffer E.; Van de Streek, Jacco, E-mail: jacco.vandestreek@sund.ku.dk [Department of Pharmacy, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100 (Denmark)

    2014-08-01

    The crystal structure of (Z)-N-(5-ethyl-2,3-di-hydro-1,3,4-thiadiazol-2-ylidene) -4-methylbenzenesulfonamide contains an imine tautomer, rather than the previously reported amine tautomer. The tautomers can be distinguished using dispersion-corrected density functional theory calculations and by comparison of calculated and measured {sup 13}C solid-state NMR spectra. The crystal structure of the title compound, C{sub 11}H{sub 13}N{sub 3}O{sub 2}S{sub 2}, has been determined previously on the basis of refinement against laboratory powder X-ray diffraction (PXRD) data, supported by comparison of measured and calculated {sup 13}C solid-state NMR spectra [Hangan et al. (2010 ▶). Acta Cryst. B66, 615–621]. The mol@@ecule is tautomeric, and was reported as an amine tautomer [systematic name: N-(5-ethyl-1,3,4-thia@@diazol-2-yl)-p-toluene@@sulfonamide], rather than the correct imine tautomer. The protonation site on the mol@@ecule’s 1,3,4-thia@@diazole ring is indicated by the inter@@molecular contacts in the crystal structure: N—H⋯O hydrogen bonds are established at the correct site, while the alternative protonation site does not establish any notable inter molecular inter@@actions. The two tautomers provide essentially identical Rietveld fits to laboratory PXRD data, and therefore they cannot be directly distinguished in this way. However, the correct tautomer can be distinguished from the incorrect one by previously reported qu@@anti@@tative criteria based on the extent of structural distortion on optimization of the crystal structure using dispersion-corrected density functional theory (DFT-D) calculations. Calculation of the {sup 13}C SS-NMR spectrum based on the correct imine tautomer also provides considerably better agreement with the measured {sup 13}C SS-NMR spectrum.

  15. Improving experimental phases for strong reflections prior to density modification

    International Nuclear Information System (INIS)

    Uervirojnangkoorn, Monarin; Hilgenfeld, Rolf; Terwilliger, Thomas C.; Read, Randy J.

    2013-01-01

    A genetic algorithm has been developed to optimize the phases of the strongest reflections in SIR/SAD data. This is shown to facilitate density modification and model building in several test cases. Experimental phasing of diffraction data from macromolecular crystals involves deriving phase probability distributions. These distributions are often bimodal, making their weighted average, the centroid phase, improbable, so that electron-density maps computed using centroid phases are often non-interpretable. Density modification brings in information about the characteristics of electron density in protein crystals. In successful cases, this allows a choice between the modes in the phase probability distributions, and the maps can cross the borderline between non-interpretable and interpretable. Based on the suggestions by Vekhter [Vekhter (2005 ▶), Acta Cryst. D61, 899–902], the impact of identifying optimized phases for a small number of strong reflections prior to the density-modification process was investigated while using the centroid phase as a starting point for the remaining reflections. A genetic algorithm was developed that optimizes the quality of such phases using the skewness of the density map as a target function. Phases optimized in this way are then used in density modification. In most of the tests, the resulting maps were of higher quality than maps generated from the original centroid phases. In one of the test cases, the new method sufficiently improved a marginal set of experimental SAD phases to enable successful map interpretation. A computer program, SISA, has been developed to apply this method for phase improvement in macromolecular crystallography

  16. Crystal structure of di-μ-chlorido-bis[chloridobis(1,2-dimethyl-5-nitro-1H-imidazole-κN3copper(II] acetonitrile disolvate

    Directory of Open Access Journals (Sweden)

    Patrick J. Quinlivan

    2016-11-01

    Full Text Available 1,2-Dimethyl-5-nitroimidazole (dimetridazole, dimet is a compound that belongs to a class of nitroimidazole drugs that are effective at inhibiting the activity of certain parasites and bacteria. However, there are few reports that describe structures of compounds that feature metals complexed by dimet. Therefore, we report here that dimet reacts with CuCl2·H2O to yield a chloride-bridged copper(II dimer, [Cu2Cl4(C5H7N3O24] or [Cu(μ-ClCl(dimet2]2. In this molecule, the CuII ions are coordinated in an approximately trigonal–bipyramidal manner, and the molecule lies across an inversion center. The dihedral angle between the imidazole rings in the asymmetric unit is 4.28 (7°. Compared to metronidazole, dimetridazole lacks the hydroxyethyl group, and thus cannot form intermolecular O...H hydrogen-bonding interactions. Instead, [Cu(μ-ClCl(dimet2]2 exhibits weak intermolecular interactions between the hydrogen atoms of C—H groups and (i oxygen in the nitro groups, and (ii the terminal and bridging chloride ligands. The unit cell contains four disordered acetonitrile molecules. These were modeled as providing a diffuse contribution to the overall scattering by SQUEEZE [Spek (2015. Acta Cryst. C71, 9–18], which identified two voids, each with a volume of 163 Å3 and a count of 46 electrons, indicative of a total of four acetonitrile molecules. These acetonitrile molecules are included in the chemical formula to give the expected calculated density and F(000.

  17. Redetermined structure of gossypol (P3 polymorph

    Directory of Open Access Journals (Sweden)

    Muhabbat Honkeldieva

    2015-07-01

    Full Text Available An improved crystal structure of the title compound, C30H30O8 (systematic name: 1,1′,6,6′,7,7′-hexahydroxy-5,5′-diisopropyl-3,3′-dimethyl[2,2′-binaphthalene]-8,8′-dicarbaldehyde, was determined based on modern CCD data. Compared to the previous structure [Talipov et al. (1985. Khim. Prirod. Soedin. (Chem. Nat. Prod., 6, 20–24], geometrical precision has been improved (typical C—C bond-distance s.u. = 0.002 Å in the present structure compared to 0.005 Å in the previous structure and the locations of several H atoms have been corrected. The gossypol molecules are in the aldehyde tautomeric form and the dihedral angle between the naphthyl fragments is 80.42 (4°. Four intramolecular O—H...O hydrogen bonds are formed. In the crystal, inversion dimers with graph-set motif R22(20 are formed by pairs of O—H...O hydrogen bonds; another pair of O—H...O hydrogen bonds with the same graph-set motif links the dimers into [001] chains. The packing of such chains in the crystal leads to the formation of channels (diameter = 5–8 Å propagating in the [101] direction. The channels presumably contain highly disordered solvent molecules; their contribution to the scattering was removed with the SQUEEZE [Spek (2015. Acta Cryst. C71, 9–18] routine in PLATON and the stated molecular mass, density etc., do not take them into account.

  18. 3-(1H-Indol-3-yl-2-(2-nitrobenzenesulfonamidopropanoic acid including an unknown solvate

    Directory of Open Access Journals (Sweden)

    Islam Ullah Khan

    2012-07-01

    Full Text Available In the title compound, C17H15N3O6S, which crystallized with highly disordered methanol and/or water solvent molecules, the dihedral angle between the the indole and benzene ring systems is 5.3 (2°, which allows for the formation of intramolecular π–π stacking interactions [centroid–centroid separations = 3.641 (3 and 3.694 (3 Å] and an approximate overall U-shape for the molecule. In the crystal, dimers linked by pairs of Ns—H...Oc (s = sulfonamide and c = carboxylate hydrogen bonds generate R22(10 loops, whereas Ni—H...π (i = indole interactions lead to chains propagating in [100] or [010]. Together, these lead to a three-dimensional network in which the solvent voids are present as intersecting (two-dimensional systems of [100] and [010] channels. The title compound was found to contain a heavily disordered solvent molecule, which could be methanol or water or a mixture of the two. Due to its uncertain nature and the unresolvable disorder, the data were processed with the SQUEEZE option in PLATON [Spek (2009. Acta Cryst. D65, 148–155], which revealed 877.8 Å3 of solvent-accessible volume per unit cell and 126 electron-units of scattering density or 109.7 Å3 (16 electron units per organic molecule.. This was not included in the calculations of overall formula weight, density and absorption coefficient.

  19. Space of symmetry matrices with elements 0, ±1 and complete geometric description; its properties and application.

    Science.gov (United States)

    Stróż, Kazimierz

    2011-09-01

    A fixed set, that is the set of all lattice metrics corresponding to the arithmetic holohedry of a primitive lattice, is a natural tool for keeping track of the symmetry changes that may occur in a deformable lattice [Ericksen (1979). Arch. Rat. Mech. Anal. 72, 1-13; Michel (1995). Symmetry and Structural Properties of Condensed Matter, edited by T. Lulek, W. Florek & S. Walcerz. Singapore: Academic Press; Pitteri & Zanzotto (1996). Acta Cryst. A52, 830-838; and references quoted therein]. For practical applications it is desirable to limit the infinite number of arithmetic holohedries, and simplify their classification and construction of the fixed sets. A space of 480 matrices with cyclic consecutive powers, determinant 1, elements from {0, ±1} and geometric description were analyzed and offered as the framework for dealing with the symmetry of reduced lattices. This matrix space covers all arithmetic holohedries of primitive lattice descriptions related to the three shortest lattice translations in direct or reciprocal spaces, and corresponds to the unique list of 39 fixed points with integer coordinates in six-dimensional space of lattice metrics. Matrices are presented by the introduced dual symbol, which sheds some light on the lattice and its symmetry-related properties, without further digging into matrices. By the orthogonal lattice distortion the lattice group-subgroup relations are easily predicted. It was proven and exemplified that new symbols enable classification of lattice groups on an absolute basis, without metric considerations. In contrast to long established but sophisticated methods for assessing the metric symmetry of a lattice, simple filtering of the symmetry operations from the predefined set is proposed. It is concluded that the space of symmetry matrices with elements from {0, ±1} is the natural environment of lattice symmetries related to the reduced cells and that complete geometric characterization of matrices in the arithmetic

  20. Crystal structure of an unknown solvate of (piperazine-κN{5,10,15,20-tetrakis[4-(benzoyloxyphenyl]porphyrinato-κ4N}zinc

    Directory of Open Access Journals (Sweden)

    Soumaya Nasri

    2016-07-01

    Full Text Available The title compound, [Zn(C72H44N4O8(C4H10N2] or [Zn(TPBP(pipz] (where TPBP and pipz are 5,10,15,20-tetrakis[4-(benzoyloxyphenyl]porphyrinato and piperazine ligands respectively, features a distorted square-pyramidal coordination geometry about the central ZnII atom. This central atom is chelated by the four N atoms of the porphyrinate anion and further coordinated by a nitrogen atom of the piperazine axial ligand, which adopts a chair confirmation. The average Zn—N(pyrrole bond length is 2.078 (7 Å and the Zn— N(pipz bond length is 2.1274 (19 Å. The zinc cation is displaced by 0.4365 (4 Å from the N4C20 mean plane of the porphyrinate anion toward the piperazine axial ligand. This porphyrinate macrocycle exhibits major saddle and moderate ruffling deformations. In the crystal, the supramolecular structure is made by parallel pairs of layers along (100, with an interlayer distance of 4.100 Å while the distance between two pairs of layers is 4.047 Å. A region of electron density was treated with the SQUEEZE [Spek (2015. Acta Cryst. C71, 9–18] procedure in PLATON following unsuccessful attempts to model it as being part of disordered n-hexane solvent and water molecules. The given chemical formula and other crystal data do not take into account these solvent molecules.

  1. Crystal and molecular structure of 2-thiouridine

    Energy Technology Data Exchange (ETDEWEB)

    Hawkinson, S W

    1977-01-01

    The ''minor'' nucleoside 2-thiouridine, C/sub 9/H/sub 12/O/sub 5/N/sub 2/S, crystallizes in a monoclinic cell, space group P2/sub 1/ with a = 5.049 (2), b = 7.526 (2), c = 14.050 (3) A, ..beta.. = 90.17 (2)/sup 0/, and d = 1.619 g cm/sup -3/ (for Z = 2) at 22 +- 2/sup 0/C. The structure was derived from 1334 unique intensities measured with an Oak Ridge computer-controlled diffractometer to a limit of sin theta/lambda = 0.65 A/sup -1/ with Nb-filtered Mo K..cap alpha.. radiation. Atomic parameters were obtained by a combination of Patterson and Fourier techniques and refined by full-matrix least squares to a final R(F) value of 0.023 for all data. The bond lengths and angles in the molecule agree well with those of other thiopyrimidines (C(2) - S = 1.677 A). The conformation of the sugar ring relative to the base is anti with a torsion angle chi(O(1')--C(1') ..-->.. N(1)--C(6)) of 17/sup 0/. The sugar exists in the 3'-endo conformation. The O(5')--C(5') bond is gauche to C(4) - O(1') and trans to C(4')--C(3') (torsion angles of 74 and -169/sup 0/ respectively). The molecules are linked together in the crystal by hydrogen bonds in an intricate network which is identical to that inferred by Kojic-Prodic, Liminga, Sljukic and Ruzic-Toros (Acta Cryst. (1974), B30, 1550-1555) for the crystal structure of 5,6-dihydro-2-thiouridine. 2 figures; 6 tables.

  2. Anharmonic thermal vibrations of be metal found in the MEM nuclear density map

    International Nuclear Information System (INIS)

    Takata, Masaki; Sakata, Makoto; Larsen, F.K.; Kumazawa, Shintaro; Iversen, B.B.

    1993-01-01

    A direct observation of the thermal vibrations of Be metal was performed by the Maximum Entropy Method (MEM) using neutron single crystal data. In the previous study, the existence of the small but significant cubic anharmonicity of Be has been found by the conventional least squares refinement of the observed structure factors [Larsen, Lehmann and Merisalo (1980) Acta Cryst. A36, 159-163]. In the present study, the same data were used for the MEM analysis which are comprised of 48 reflections up to sinθ/λ = 1.41A -1 in order to obtain the high resolution nuclear density of Be without using any thermal vibrational model. It was directly visible in the MEM map that not only the cubic terms but also quartic anharmonicities exist in the thermal vibrations of Be nuclei. In order to evaluate thermal parameters of Be including anharmonic terms quantitatively, the least squares refinement of the effective one-particle potential (OPP) parameters up to quartic term was carried out by using the MEM nuclear densities around atomic sites as the data set to be fitted. It was found that the present treatment has a great advantage to decide the most appropriate model of OPP by visually comparing the model with MEM density map. As a result of the least squares refinement, the anharmonic thermal parameters are obtained as α 33 = -0.340(5)[eV/A 3 ], α 40 = 0, β 20 = 9.89(1)[eV/A 4 ] and γ 00 = 0. No other anharmonic term was significant. (author)

  3. Texture, residual stress and structural analysis of thin films using a combined X-ray analysis

    International Nuclear Information System (INIS)

    Lutterotti, L.; Chateigner, D.; Ferrari, S.; Ricote, J.

    2004-01-01

    Advanced thin films for today's industrial and research needs require highly specialized methodologies for a successful quantitative characterization. In particular, in the case of multilayer and/or unknown phases a global approach is necessary to obtain some or all the required information. A full approach has been developed integrating novel texture and residual stress methodologies with the Rietveld method (Acta Cryst. 22 (1967) 151) (for crystal structure analysis) and it has been coupled with the reflectivity analysis. The complete analysis can be done at once and offers several benefits: the thicknesses obtained from reflectivity can be used to correct the diffraction spectra, the phase analysis help to identify the layers and to determine the electron density profile for reflectivity; quantitative texture is needed for quantitative phase and residual stress analyses; crystal structure determination benefits of the previous. To achieve this result, it was necessary to develop some new methods, especially for texture and residual stresses. So it was possible to integrate them in the Rietveld, full profile fitting of the patterns. The measurement of these spectra required a special reflectometer/diffractometer that combines a thin parallel beam (for reflectivity) and a texture/stress goniometer with a curved large position sensitive detector. This new diffraction/reflectivity X-ray machine has been used to test the combined approach. Several spectra and the reflectivity patterns have been collected at different tilting angles and processed at once by the special software incorporating the aforementioned methodologies. Some analysis examples will be given to show the possibilities offered by the method

  4. Karg S., D.E. Robinson (2002): Secondary food plants from medieval sites in Denmark: fruits, nuts, vegetables, herbs and spices. In: K. Viklund, R. Engelmark (eds.) Nordic Archaeobotany-NAG 2000 in Umeå.

    DEFF Research Database (Denmark)

    Karg, Sabine

    2002-01-01

    Secondary food plants from medieval sites in Denmark: fruits, nuts, vegetables, herbs and spices.......Secondary food plants from medieval sites in Denmark: fruits, nuts, vegetables, herbs and spices....

  5. Evaluación químico bromatológica de las variedades Yurac Llajum, Gello Llajum y Yurac Checche de Smallanthus Sonchifolius (Poepp & Endl).H. Robinson (Yacón) procedente de Puno

    OpenAIRE

    Ramos Zapana, Rubén; Arias Arroyo, Gladys

    2014-01-01

    Las variedades Yurac llajum, Qello llajum y Yurac checche de la especie Smallanthus sonchifolius (Poepp & Endl) (Yacón), procedente de la provincia de Sandia del Departamento de Puno, se desarrollan entre 1500 a 3000 msnm. Conocidas como “yacón”, “yakuma”, “llaqón”, “llacun” o “llacuma” en quechua; en aymara “aricoma” o “aricuma“; en español “Yacón”, “Jacón”, “llacón”, “arboloco”, “Puhe”, “jicama”, “jíquima”, “jikima” o “jiquimilla”. Estas raíces tuberosas de sabor dulce y refrescante, de asp...

  6. Bibliography of Soviet Laser Developments, Number 67, September-October 1983.

    Science.gov (United States)

    1984-12-05

    hungaricae APOBB Acta physica polonica . Series B APSVC Acta physica slovaca APYCA Acta physica et chemica. Szeged ARPTA Arkhiv patologii ATPLB Acta ...77 IV SOURCE ABBREVIATIONS (Note: CTC acover-to-cover translation available) APAHA Acta physica academiae scientiarum... physica polonica . Series A AVMEB Avtometriya (CTC) BPPHA Beitraege aus der Plasmaphysik CKCFA Ceskoslovensky casopis pro fysiku CMSSMODD Mezhvedomstvennoye

  7. Comparative Studies on Optical and Electronic Behavior of ...

    Indian Academy of Sciences (India)

    Prabu Mani

    2018-05-29

    May 29, 2018 ... And these dodecahedrons are connected through chelidamic acid ligand ... acid based lanthanide coordination polymers. ...... 3-carboxylate and oxalate ligands Dalton Trans. ... dicarboxylic acid and oxalic acid ligands Cryst.

  8. Nucleobase assemblies supported by uranyl cation coordination ...

    Indian Academy of Sciences (India)

    organic hybrid materials using smaller building blocks, which can be ..... nucleobase analogs, in addition to the presence of car- boxylate ... R 2004 Cryst. Eng. Comm. .... Sheldrick G M 2000 SADABS 2.0 (Germany: University of Göttingen). 76.

  9. Two Beam Energy Exchange in Hybrid Liquid Crystal Cells with Photorefractive Field Controlled Boundary Conditions (Postprint)

    Science.gov (United States)

    2016-09-12

    axis modulation. © 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license...Miniewicz, Appl . Phys. Lett. 74, 2924 (1999). 6 S. Bartkiewicz, K. Matczyszyn, A. Miniewicz, and F. Kajzar, Opt. Commun. 187, 257 (2001). 7 G. P...1997). 9 H. Ono and N. Kawatsuki, J. Appl . Phys. 85, 2482 (1999). 10 G. Cook, J. L. Carns, M. A. Saleh, and D. R. Evans, Mol. Cryst. Liq. Cryst. 453

  10. Bis(1,3-dimethyl-1H-imidazolium hexafluorosilicate methanol 0.33-solvate

    Directory of Open Access Journals (Sweden)

    Maxim V. Borzov

    2013-08-01

    Full Text Available The title compound, 6C5H9N2+·3SiF62−·CH3OH, (I, was prepared by recrystallization of the crude salt from methanol along with solvent-free 2C5H9N2+·SiF62− (II. Crystals of these solvatomorphs can be separated manually. The solvate (I crystallizes in a rare hexagonal space group P6/mcc. Its asymmetric unit comprises one half of an imidazolium cation bisected by the crystallographic m-plane, one-sixth and one-twelfth of two crystallographically independent SiF62– dianions (Si atoms are located on the 3.2 and 6/m inversion centres, and one-twelfth of a methanol molecule (C atoms are situated on the 622 inversion centres, other atoms are disordered between general positions. In (I, all F atoms of 3.2-located SiF62– dianions participate in the formation of symmetry-equivalent contacts to the H atoms of imidazolium fragments, thus forming rod-type ensembles positioned on the -6 axes. These `pillar' rods are, in turn, F...H interlinked through SiF62– dianions disordered around the 6/m centres. The twelvefold disordered methanol molecules are appended to this array by O—H...F hydrogen bonds to the 6/m located SiF62– dianions. In terms of graph-set notation, the first and second level networks in (I are N1 = C22(7[3R44(14]D22(4 and N2 = D22(5 (C—H...O hydrogen bonds are not considered. After locating all symmetrically independent atoms in the cation and anions, there remained a strong (> 3 e Å−3 residual electron density peak located at the 622 inversion centre. Treatment of this pre-refined model with the SQUEEZE procedure in PLATON [Spek (2009. Acta Cryst. D65, 148–155] revealed two voids per unit cell, indicative of the presence of the solvent methanol molecule disordered about the 622 inversion centre.

  11. Molecular replacement then and now

    International Nuclear Information System (INIS)

    Scapin, Giovanna

    2013-01-01

    A brief overview, with examples, of the evolution of molecular-replacement methods and models over the past few years is presented. The ‘phase problem’ in crystallography results from the inability to directly measure the phases of individual diffracted X-ray waves. While intensities are directly measured during data collection, phases must be obtained by other means. Several phasing methods are available (MIR, SAR, MAD, SAD and MR) and they all rely on the premise that phase information can be obtained if the positions of marker atoms in the unknown crystal structure are known. This paper is dedicated to the most popular phasing method, molecular replacement (MR), and represents a personal overview of the development, use and requirements of the methodology. The first description of noncrystallographic symmetry as a tool for structure determination was explained by Rossmann and Blow [Rossmann & Blow (1962 ▶), Acta Cryst.15, 24–31]. The term ‘molecular replacement’ was introduced as the name of a book in which the early papers were collected and briefly reviewed [Rossmann (1972 ▶), The Molecular Replacement Method. New York: Gordon & Breach]. Several programs have evolved from the original concept to allow faster and more sophisticated searches, including six-dimensional searches and brute-force approaches. While careful selection of the resolution range for the search and the quality of the data will greatly influence the outcome, the correct choice of the search model is probably still the main criterion to guarantee success in solving a structure using MR. Two of the main parameters used to define the ‘best’ search model are sequence identity (25% or more) and structural similarity. Another parameter that may often be undervalued is the quality of the probe: there is clearly a relationship between the quality and the correctness of the chosen probe and its usefulness as a search model. Efforts should be made by all structural biologists to

  12. Towards a compact and precise sample holder for macromolecular crystallography.

    Science.gov (United States)

    Papp, Gergely; Rossi, Christopher; Janocha, Robert; Sorez, Clement; Lopez-Marrero, Marcos; Astruc, Anthony; McCarthy, Andrew; Belrhali, Hassan; Bowler, Matthew W; Cipriani, Florent

    2017-10-01

    SPINE was tested at different institutes using evaluation kits, and pilot beamlines are being equipped with compatible robotics for large-scale evaluation. A companion paper describes a new sample changer FlexED8 (Papp et al., 2017, Acta Cryst., D73, 841-851).

  13. Crystallography beyond periodic Crystal perfection

    International Nuclear Information System (INIS)

    Estevez-Rams, E.

    2008-01-01

    Full text: The discovery of the quasi-crystals [D. Schechtman et. Al., Phys.] Rev. Lett. [53, 1951-1953 (1984)] made very narrow definition of the crystalline state based on the periodicity of a local arrangement of atoms. Since the definition of this State has been a matter of much controversy [G.R. Desiraju, Nature 423, 485 (2003); S. van Smaalen, IUCR Aperiodic Commission Reports. August 7, 2002; International Union of Crystallography. Report of the Executive Committee for 1991; ACTA Cryst. A48, 922-946 (1992)]. We will make a presentation of the current time of the crystallography in this regard from the conceptual point of view. We show the use of the formalism of algorithmic complexity or Kolmogorov [M. Li and P. Vitanyi, An Introduction to Kolmogorov Complexity and Its Applications (Springer Verlag, Heidelberg, 1993), W.H. Zurek, Phys.] Rev. 40, 4731 (1989); Nature 341, 119-124 (1989)] provides a different perspective on the nature of the Crystallographic order. Infinite crystals can be considered solid with zero algorithmic complexities by atom. Show statistical analysis of inorganic compounds [J.L.C. Daams et al., Atlas of Crystal Structure Types for Intermetallic Phases (ASM International, Ohio, 1991), Fachinformationszentrum/NIST Inorganic Crystal Structure Database, Karlsruhe (2003) icsd.fkf.mpg.de] demonstrating that the minimization of complexity is a trend in the crystalline arrangement. We will then compare the degree of disorder of some typical solids according to their algorithmic complexity. Finally, space diffraction will be studied from this same perspective and will be discussed that zero algorithmic complexities by point in space of diffraction does not necessarily imply the same thing for the Atomic arrangement. The discrete portion of the diffraction pattern is a fingerprint of the underlying order but not the actual existence of long-range order. Experimental results will be showcased [E. Estévez-Rams et al., Physical Review B, 63 (2001

  14. Crystal structures of N2,N3,N5,N6-tetrakis(pyridin-2-ylmethylpyrazine-2,3,5,6-tetracarboxamide and N2,N3,N5,N6-tetrakis(pyridin-4-ylmethylpyrazine-2,3,5,6-tetracarboxamide

    Directory of Open Access Journals (Sweden)

    Dilovan S. Cati

    2017-02-01

    Full Text Available The title compounds, C32H28N10O4· unknown solvent, (I, and C32H28N10O4, (II, are pyrazine-2,3,5,6-tetracarboxamide derivatives. In (I, the substituents are (pyridin-2-ylmethylcarboxamide, while in (II, the substituents are (pyridin-4-ylmethylcarboxamide. Both compounds crystallize in the monoclinic space group P21/n, with Z′ = 1 for (I, and Z′ = 0.5 for (II. The whole molecule of (II is generated by inversion symmetry, the pyrazine ring being situated about a center of inversion. In (I, the four pyridine rings are inclined to the pyrazine ring by 83.9 (2, 82.16 (18, 82.73 (19 and 17.65 (19°. This last dihedral angle involves a pyridine ring that is linked to the adjacent carboxamide O atom by an intramolecular C—H...O hydrogen bond. In compound (II, the unique pyridine rings are inclined to the pyrazine ring by 33.3 (3 and 81.71 (10°. There are two symmetrical intramolecular C—H...O hydrogen bonds present in (II. In the crystal of (I, molecules are linked by N—H...O and N—H...N hydrogen bonds, forming layers parallel to (10-1. The layers are linked by C—H...O and C—H...N hydrogen bonds, forming a three-dimensional framework. In the crystal of (II, molecules are linked by N—H...N hydrogen bonds, forming chains propagating along the [010] direction. The chains are linked by a weaker N—H...N hydrogen bond, forming layers parallel to the (101 plane, which are in turn linked by C—H...O hydrogen bonds, forming a three-dimensional structure. In the crystal of compound (I, a region of disordered electron density was treated with the SQUEEZE routine in PLATON [Spek (2015. Acta Cryst. C71, 9–18]. Their contribution was not taken into account during refinement. In compound (II, one of the pyridine rings is positionally disordered, and the refined occupancy ratio for the disordered Car—Car—Npy atoms is 0.58 (3:0.42 (3.

  15. Crystal structures of a copper(II and the isotypic nickel(II and palladium(II complexes of the ligand (E-1-[(2,4,6-tribromophenyldiazenyl]naphthalen-2-ol

    Directory of Open Access Journals (Sweden)

    Souheyla Chetioui

    2016-08-01

    Full Text Available In the copper(II complex, bis{(E-1-[(2,4,6-tribromophenyldiazenyl]naphthalen-2-olato}copper(II, [Cu(C16H8Br3N2O2], (I, the metal cation is coordinated by two N atoms and two O atoms from two bidentate (E-1-[(2,4,6-tribromophenyldiazenyl]naphthalen-2-olate ligands, forming a slightly distorted square-planar environment. In one of the ligands, the tribromobenzene ring is inclined to the naphthalene ring system by 37.4 (5°, creating a weak intramolecular Cu...Br interaction [3.134 (2 Å], while in the other ligand, the tribromobenzene ring is inclined to the naphthalene ring system by 72.1 (6°. In the isotypic nickel(II and palladium(II complexes, namely bis{(E-1-[(2,4,6-tribromophenyldiazenyl]naphthalen-2-olato}nickel(II, [Ni(C16H8Br3N2O2], (II, and bis{(E-1-[(2,4,6-tribromophenyldiazenyl]naphthalen-2-olato}palladium(II, [Pd(C16H8Br3N2O2], (III, respectively, the metal atoms are located on centres of inversion, hence the metal coordination spheres have perfect square-planar geometries. The tribromobenzene rings are inclined to the naphthalene ring systems by 80.79 (18° in (II and by 80.8 (3° in (III. In the crystal of (I, molecules are linked by C—H...Br hydrogen bonds, forming chains along [010]. The chains are linked by C—H...π interactions, forming sheets parallel to (011. In the crystals of (II and (III, molecules are linked by C—H...π interactions, forming slabs parallel to (10-1. For the copper(II complex (I, a region of disordered electron density was corrected for using the SQUEEZE routine in PLATON [Spek (2015. Acta Cryst. C71, 9–18]. The formula mass and unit-cell characteristics of the disordered solvent molecules were not taken into account during refinement.

  16. Bibliography of Soviet Laser Developments, Number 79, September - October 1985.

    Science.gov (United States)

    1987-01-01

    hungarica (Budapest) (formerly APAHA) APYCA Acta physica et chemica. Szeged ATPLB Acta physica polonica . Series A AVMEB Avtometriya (CTC) BPBEE...cover translation available) AKZHA Akusticheskiy zhurnal (CTC) APAHA Acta physica acadeniiae scientiarum hungaricae (flow APHUE) APHUE Acta physica ...Pribory i tekhnika eksperimenta (CTC) PSSAB Physica status solidi (A). Applied Research (GDR) PSSBB Physica status solidi (B). Basic Research (GDR

  17. Proceedings of the 3. Regional Meeting on Radiological and Nuclear Safety. Radiological protection in Latin America and the Caribbean. Vol. 1,2; Actas del 3. Congreso Regional sobre Seguridad Radiologica y Nuclear. Proteccion Radiologica en America Latina y el Caribe. Vol. 1,2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-08-01

    Two volumes contain more than 183 complete papers presented during the Third Regional Meeting on Radiological Protection and Nuclear Safety held on 23-27 October, 1995 in Cusco-Peru. Latin american specialist talk about nuclear safety and radiological protection, radiation natural exposure, biological effect of radiation, radiotherapy and medical radiological safety, radiological safety in industry and research. Also we deal with subjects related to radiological safety of nuclear and radioactive facilities, radioactive waste management, radioactive material transport, environmental radiological monitoring program, radiological emergency and accidents, instruments and dosimetry, basic safety standards of protection against radiation.

  18. DOI: 10.4025/actascibiolsci.v33i3.8011 Acta Scientiarum. Biological Sciences Maringá, v. 33, n. 3, p. 239-246, 2011 Acute inflammatory response in Nile tilapia fed probiotic Lactobacillus plantarum in the diet = Resposta inflamatória aguda em tilápia do Nilo alimentada com probiótico, Lactobacillus plantarum na dieta

    Directory of Open Access Journals (Sweden)

    Geovana Dotta

    2011-07-01

    Full Text Available The present study evaluated the acute inflammatory response induced bycarrageenin (500 £gg injected in the swim bladder of Nile tilapia, after fed or not probiotic supplemented diet. Fifty four fish were distributed in six treatments and three replicates: Group A: Fish fed unsupplemented diet: 0.5 mL saline-injected fish; fish injected with 500 £gg carrageenin diluted in 0.5 mL saline; Non-injected. Group B: Fish fed probiotic supplemented diet: saline-injected fish; carrageenin-injected fish; Non-injected. Fifteen days after feeding the fish were injected with carrageenin or saline. After six hours, inflammatory exudate was collected, as well as the blood for hematocrit, red blood cell (RBC and white blood cell (WBC counts, differential count of leucocytes and phagocytic activity in the blood. Supplementation with probiotic did not influence the RBC, hematocrit and the numbers of lymphocytes and basophils in the blood. The number of neutrophils was significantly higher in supplemented fish injected with carrageenin. Glucose concentration in supplemented and non-injected fish was higher than that observed in the saline injected ones. Probiotic potentialized the migration of cells to the inflammatory focus in the animals injected with the carrageenin irritant. In fish injected with saline and carrageenin occurred the greatest phagocytic activity in the blood in relation to those treatments.Este trabalho avaliou a resposta inflamatoria aguda induzida por injecao de carragenina (500 ƒÝg na bexiga natatoria de tilapia do Nilo suplementada ou nao com probiotico na racao. Cinquenta e quatro animais foram distribuidos em seis tratamentos com tres repeticoes: Grupo A: peixes alimentados com racao naosuplementada: Controle (injecao de 0,5 mL de solucao salina esteril; Carragenina (injecao de500 £gg de carragenina; Nao-injetada. Grupo B: peixes alimentados com racao suplementada com probiotico: Controle; Carragenina; Nao-injetada. Apos 15 dias de alimentacao foi injetado carragenina ou salina. Apos 6h, realizou-se a coleta de exsudato e sangue para determinacao do hematocrito, contagens totais de eritrocitos, leucocitos, contagem diferencial de leucocitos e atividade fagocitaria no sangue. A suplementacao com probiotico na racao nao influenciou o numero total de eritrocitos, o hematocrito e os numeros de linfocitos e basofilos no sangue dos animais. O numero de neutrofilos foi maior nos peixes suplementados com probiotico einjetados com carragenina. A glicose nos peixes suplementados com probiotico nao-injetados foi maior do que nos injetados com salina. A suplementacao com probiotico potencializou a migracao de celulas para o foco inflamatorio nos injetados com o flogogeno carragenina. Empeixes injetados com salina e carragenina, ocorreu maior atividade fagocitaria no sangue em relacao aos demais tratamentos.

  19. Guia del Proceso del IFSP de Colorado: Conexiones para la Ninez Temprana, Iniciativa Infantil de Colorado Parte C del Acta de Educacion para Individuos con Desabilidades (Colorado Guidelines for the IFSP Process: Early Childhood Connections, Colorado's Infant/Toddler Initiative for Part C of the Individuals with Disabilities Education Act).

    Science.gov (United States)

    Miller, Jerri; Petersen, Sandy

    This booklet for Spanish-speaking parents of young children with disabilities describes Colorado's Individualized Family Service Plan (IFSP) process. It explains guidelines, shares family stories and reflections for families and care providers, and the describes the values that drive the IFSP process in Colorado. Information is provided on…

  20. Structure/Property Relationships of Siloxane-Based Liquid Crystalline Materials

    Science.gov (United States)

    1992-05-01

    1974). (6) Goossens , N.J.,., Mol. Cryst. Liq. Cryst., 12,237-244(1971). (7) Gray, G.W. and Goodby, J.W.G., Smectic Liquid Crystals- Textures and...pp 30-105, (1989). 42 (59) Richards , R.D.C., Hawthorne, W.D., Hill, J.S., White, M.S., Lacey, D., Semlyen, J.A., Gray, G.W., and Kendrick, T.C., J...946(1985). (30) Davidson, P. and Levelut, A.M., J. Phys., 49, 689-695(1988). (31) Richards , R.D.C., Hawthorne, W.D., Hill, J.S., White, M.S., Lacey