FoAM Kernow Activity Report 2017

OpenAIRE

Griffiths, Amber; Weatherill, Aidan; Griffiths, David

2017-01-01

This review shows selected projects from the FoAM Kernow studio in 2017. FoAM is a network of transdisciplinary labs at the intersection of art, science, nature and everyday life. FoAM’s members are generalists - people who work across disparate fields in an entangled, speculative culture. Research and creative projects at FoAM combine elements of futurecrafting, citizen science, prototyping, experience design and process facilitation to re-imagine possible futures.

Prisiones e internados: una comparación de los establecimientos penales en América del Norte y América Latina

Directory of Open Access Journals (Sweden)

Christopher Howard Birkbeck

Full Text Available El empleo reciente de términos como "warehouse prison" en Estados Unidos y "campo de concentración" en América Latina parecería indicar que las condiciones de privación de la libertad son distintas en ambas regiones. El análisis presentado aquí explora esas diferencias. Se comparan los establecimientos penales en América del Norte y América Latina a través de seis dimensiones relacionadas entre sí: la organización interna de los espacios, la vigilancia, el aislamiento, la supervisión, el control administrativo y la formalización de los procedimientos. En América del Norte, el control es asiduo (persistente, intrusivo y casi permanente; en América Latina, el control es somero (esporádico, indiferente y superficial. Si en América del Norte se habla de prisiones y encarcelamiento, en América Latina parece mejor hablar de internados judiciales e internación.

A decade of AMS at University of Georgia

International Nuclear Information System (INIS)

Culp, Randy; Noakes, John; Cherkinsky, Alex; Ravi Prasad, G.V.; Dvoracek, Doug

2013-01-01

In a span of 10 years, University of Georgia’s Center for Applied Isotope Studies (CAIS) has transformed itself from principally a liquid scintillation counting (LSC) laboratory to one conducting thousands of accelerator mass spectrometry (AMS) and stable isotope ratio analysis (SIRA) annually. After receiving the first of the NEC compact AMS units in the United States, the CAIS began to meet the demand for 14 C analysis outside the normal realm of most radiocarbon dating laboratories. With industry’s support, isotope research continued on an already developing natural products program to authenticate materials origin and process of formation. The CAIS’s AMS allowed for the detection of synthetic materials in milligram quantities rather than gram quantities required by LSC and allowed new compound specific SIRA techniques to be directed toward compound specific 14 C measurement. By 2005 the CAIS was one of only a few laboratories accredited to determine bio-base content in industrial fuels and products by both AMS and LSC following ASTM D6866-10 [1]. Since 2001, when our first sample was analyzed by AMS method, both radiocarbon and natural products sample numbers have increased steadily. The advantages of AMS analysis in overall efficiency, cost savings, accuracy, and precision, are detailed here in a review of analytical precision for radiocarbon and natural products analyzed over 10 years of AMS operation. Comparisons are made between natural products and bio-based materials analyzed by both AMS and LSC. Although high precision is not required to authenticate natural products, for the purpose of product comparison with regard to degree of naturalness accurate and precise 14 C measurement is shown to be achievable by both methods.

Interventions pour améliorer la santé des mères, des nouveau-nés ...

International Development Research Centre (IDRC) Digital Library (Canada)

Améliorer la qualité des soins. - Assurer la bonne continuité de la prise en charge des mères et des enfants. - S'attaquer aux problèmes financiers et géographiques liés au paludisme saisonnier. De la grossesse à l'accouchement. Dans les deux pays visés, les chercheurs évalueront le rôle de quatre interventions sur les ...

A final test for AMS at ESTEC

CERN Multimedia

Paola Catapano

2010-01-01

The Alpha Magnetic Spectrometer (AMS) left CERN on Friday 12th February on the first leg of its journey to the International Space Station (ISS). The special convoy carrying the experiment arrived at the European Space Agency’s research and technology centre (ESTEC) in the Netherlands at 4.30 pm on Tuesday 16th February. AMS will then fly to the Kennedy Space Center in Florida before lifting off aboard the space shuttle.   Arrival of the AMS detector at ESTEC in the Netherlands (Credit ESA/Jari Makinen) The transportation of an 8.5-tonne load filled with superfluid helium across Europe is no ordinary shipment. The AMS detector was first inserted into a supporting structure, specially built by the collaboration’s mechanical engineers, then surrounded by protective plastic foil, placed in a box and finally carefully loaded onto the special lorry also carrying a diesel generator running a pump to keep the helium at the right temperature (about 2 K). Its initial destination is ES...

A decade of AMS at University of Georgia

Energy Technology Data Exchange (ETDEWEB)

Culp, Randy, E-mail: rculp@uga.edu [Center for Applied Isotope Studies, University of Georgia, Athens, GA (United States); Noakes, John; Cherkinsky, Alex; Ravi Prasad, G.V.; Dvoracek, Doug [Center for Applied Isotope Studies, University of Georgia, Athens, GA (United States)

2013-01-15

In a span of 10 years, University of Georgia's Center for Applied Isotope Studies (CAIS) has transformed itself from principally a liquid scintillation counting (LSC) laboratory to one conducting thousands of accelerator mass spectrometry (AMS) and stable isotope ratio analysis (SIRA) annually. After receiving the first of the NEC compact AMS units in the United States, the CAIS began to meet the demand for {sup 14}C analysis outside the normal realm of most radiocarbon dating laboratories. With industry's support, isotope research continued on an already developing natural products program to authenticate materials origin and process of formation. The CAIS's AMS allowed for the detection of synthetic materials in milligram quantities rather than gram quantities required by LSC and allowed new compound specific SIRA techniques to be directed toward compound specific {sup 14}C measurement. By 2005 the CAIS was one of only a few laboratories accredited to determine bio-base content in industrial fuels and products by both AMS and LSC following ASTM D6866-10 [1]. Since 2001, when our first sample was analyzed by AMS method, both radiocarbon and natural products sample numbers have increased steadily. The advantages of AMS analysis in overall efficiency, cost savings, accuracy, and precision, are detailed here in a review of analytical precision for radiocarbon and natural products analyzed over 10 years of AMS operation. Comparisons are made between natural products and bio-based materials analyzed by both AMS and LSC. Although high precision is not required to authenticate natural products, for the purpose of product comparison with regard to degree of naturalness accurate and precise {sup 14}C measurement is shown to be achievable by both methods.

Annotation Method (AM): SE36_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE36_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE14_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE14_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE33_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE33_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE12_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE12_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE20_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE20_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE28_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE28_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE11_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE11_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE17_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE17_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE10_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE10_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE25_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE25_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE30_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE30_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE16_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE16_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE29_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE29_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE35_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE35_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE13_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE13_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE26_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE26_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE27_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE27_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE34_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE34_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE15_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE15_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE31_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE31_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Annotation Method (AM): SE32_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available abase search. Peaks with no hit to these databases are then selected to secondary s...earch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are m...SE32_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary dat

Améliorer la gouvernance, la représentation et l'accès à la justice ...

International Development Research Centre (IDRC) Digital Library (Canada)

Améliorer la gouvernance, la représentation et l'accès à la justice dans les établissements humains spontanés au Ghana. Beaucoup de Ghanéens vivant en milieu urbain ne profitent pas encore des avantages de la stabilité démocratique et de la récente croissance économique dans leur pays. Environ 40 % de la ...

Amós Oz: de lealdades e traições

Directory of Open Access Journals (Sweden)

Saul Kirschbaum

2015-11-01

Full Text Available Este artigo analisará Judas, o mais recente romance (2014 do escritor israelense Amós Oz. Nessa obra de ficção, Oz utiliza o contexto da suposta traição do apóstolo Judas, narrada nos Evangelhos, e o delicado relacionamento afetivo entre um jovem universitário e uma viúva de guerra de meia idade para abordar as intensas controvérsias no interior do movimento sionista nos anos que antecederam a criação do Estado de Israel, com veementes acusações de traição contra os militantes que se opuseram à linha hegemônica da Organização Sionista e da Agência Judaica – propunham a criação de um estado binacional – e tentativas de deslegitimá-los.

Possibilités et avantages des plantes médicinales en Amérique latine

International Development Research Centre (IDRC) Digital Library (Canada)

1 févr. 2011 ... Le parc national Darién au Panama est le plus grand parc national d'Amérique ... kuna et wounaan — installés dans les limites du parc n'ont pratiquement pas ... Avec l'appui du Centre de recherches pour le développement .... Il importe de se rendre compte que la santé humaine est tributaire de celle ...

Think Big: Leadership Projects for AMS and Montessori Educators

Science.gov (United States)

Chattin-McNichols, John

2014-01-01

The American Montessori Society's (AMS) 2014 Living Legacy recipient, John Chattin-McNichols, delivered the keynote address at the Annual Conference in Dallas, TX, on March 27, 2014, In his speech, he described three overall highlights of AMS: (1) AMS is now a world-leading organization; (2) It must become a learning organization; and (3)…

A decade of AMS at the University of Georgia

Science.gov (United States)

Culp, Randy; Noakes, John; Cherkinsky, Alex; Ravi Prasad, G. V.; Dvoracek, Doug

2013-01-01

In a span of 10 years, the University of Georgia’s Center for Applied Isotope Studies (CAIS) has transformed itself from principally a liquid scintillation counting (LSC) laboratory to one conducting thousands of accelerator mass spectrometry (AMS) and stable isotope ratio analysis (SIRA) annually. After receiving the first of the NEC compact AMS units in the United States, the CAIS began to meet the demand for 14C analysis outside the normal realm of most radiocarbon dating laboratories. With industry’s support, isotope research continued on an already developing natural products program to authenticate materials origin and process of formation. The CAIS’s AMS allowed for the detection of synthetic materials in milligram quantities rather than gram quantities required by LSC and allowed new compound specific SIRA techniques to be directed toward compound specific 14C measurement. By 2005 the CAIS was one of only a few laboratories accredited to determine bio-base content in industrial fuels and products by both AMS and LSC following ASTM D6866-10 [1]. Since 2001, when our first sample was analyzed by AMS method, both radiocarbon and natural products sample numbers have increased steadily. The advantages of AMS analysis in overall efficiency, cost savings, accuracy, and precision, are detailed here in a review of analytical precision for radiocarbon and natural products analyzed over 10 years of AMS operation. Comparisons are made between natural products and bio-based materials analyzed by both AMS and LSC. Although high precision is not required to authenticate natural products, for the purpose of product comparison with regard to degree of naturalness accurate and precise 14C measurement is shown to be achievable by both methods.

Production durable de légumes sous-utilisés en vue d'améliorer la ...

International Development Research Centre (IDRC) Digital Library (Canada)

Production durable de légumes sous-utilisés en vue d'améliorer la sécurité alimentaire en milieu ruralrity (Les légumes indigènes revêtent une importance capitale pour les femmes pauvres vivant en milieu rural, mais ont reçu, à ce jour, peu d'attention de la part des milieux de la recherche, du développement et des ...

Progress on multi-nuclide AMS of JAEA-AMS-TONO

Science.gov (United States)

Saito-Kokubu, Yoko; Matsubara, Akihiro; Miyake, Masayasu; Nishizawa, Akimitsu; Ohwaki, Yoshio; Nishio, Tomohiro; Sanada, Katsuki; Hanaki, Tatsumi

2015-10-01

The JAEA-AMS-TONO (Japan Atomic Energy Agency's Accelerator Mass Spectrometer established at the Tono Geoscience Center) facility has been used for the dating of geological samples. The AMS system is versatile, based on a 5 MV tandem Pelletron-type accelerator. Since its establishment in 1997, the AMS system has been used for measurement of carbon-14 (14C) mainly for 14C dating studies in neotectonics and hydrogeology, in support of JAEA's research on geosphere stability applicable to the long-term isolation of high-level radioactive waste. Results of the measurement of 14C in soils and plants has been applied to the dating of fault activity and volcanism. Development of beryllium-10 (10Be) and aluminum-26 (26Al) AMS systems are now underway to enhance the capability of the multi-nuclide AMS in studies of dating by cosmogenic nuclides. The 10Be-AMS system has already been used for routine measurements in applied studies and improvements of the measurement technique have been made. Now we plan to fine tune the system and perform test measurements to develop the 26Al-AMS system.

Nepieciešamās profesionālās iemaņas darbā ar bērniem bibliotēkās

OpenAIRE

Jefimova, Sabīne

2006-01-01

Darbā ar bērniem bibliotēkās svarīgas ir bērnu bibliotekāra personiskās īpašības un profesionālās iemaņas. Mūsdienās profesionālam bērnu bibliotekāram tās sevī jāizkopj, jāattīsta un jāpilnveido. Bakalaura darbs “Nepieciešamās profesionālās iemaņas darbā ar bērniem bibliotēkās” atspoguļo bērnu bibliotekāru zināšanu, prasmju un iemaņu teorētiskos un praktiskos aspektus augstvērtīgai bērnu bibliotekārās apkalpošanas nodrošināšanai. Bakalaura darbā tiek skartas aktuālākās bērnu bibliotekār...

Resource for the Development of Biomedical Accelerator Mass Spectrometry (AMS)

Energy Technology Data Exchange (ETDEWEB)

Turteltaub, K. W. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Bench, G. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Buchholz, B. A. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Enright, H. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Kulp, K. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); McCartt, A. D. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Malfatti, M. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Ognibene, T. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Loots, G. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Stewart, B. J. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

2016-04-08

The NIH Research Resource for Biomedical AMS was originally funded at Lawrence Livermore National Laboratory in 1999 to develop and apply the technology of accelerator mass spectrometry (AMS) in broad- based biomedical research. The Resource’s niche is to fill needs for ultra high sensitivity quantitation when isotope-labeled agents are used. The Research Resource’s Technology Research and Development (TR&D) efforts will focus on the needs of the biomedical research community in the context of seven Driving Biomedical Projects (DBPs) that will drive the Center’s technical capabilities through three core TR&Ds. We will expand our present capabilities by developing a fully integrated HPLC AMS to increase our capabilities for metabolic measurements, we will develop methods to understand cellular processes and we will develop and validate methods for the application of AMS in human studies, which is a growing area of demand by collaborators and service users. In addition, we will continue to support new and ongoing collaborative and service projects that require the capabilities of the Resource. The Center will continue to train researchers in the use of the AMS capabilities being developed, and the results of all efforts will be widely disseminated to advance progress in biomedical research. Towards these goals, our specific aims are to:1.) Increase the value and information content of AMS measurements by combining molecular speciation with quantitation of defined macromolecular isolates. Specifically, develop and validate methods for macromolecule labeling, characterization and quantitation.2.) Develop and validate methods and strategies to enable AMS to become more broadly used in human studies. Specifically, demonstrate robust methods for conducting pharmacokinetic/pharmacodynamics studies in humans and model systems.3.) Increase the accessibility of AMS to the Biomedical research community and the throughput of AMS through direct coupling to separatory

Resource for the Development of Biomedical Accelerator Mass Spectrometry (AMS)

Energy Technology Data Exchange (ETDEWEB)

Tuerteltaub, K. W. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Bench, G. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Buchholz, B. A. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Enright, H. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Kulp, K. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Loots, G. G. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); McCartt, A. D. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Malfatti, M. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Ognibene, T. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Stewart, B. J. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

2017-03-21

The NIH Research Resource for Biomedical AMS was originally funded at Lawrence Livermore National Laboratory in 1999 to develop and apply the technology of accelerator mass spectrometry (AMS) in broad- based biomedical research. The Resource’s niche is to fill needs for ultra high sensitivity quantitation when isotope-labeled agents are used. The Research Resource’s Technology Research and Development (TR&D) efforts will focus on the needs of the biomedical research community in the context of seven Driving Biomedical Projects (DBPs) that will drive the Center’s technical capabilities through three core TR&Ds. We will expand our present capabilities by developing a fully integrated HPLC AMS to increase our capabilities for metabolic measurements, we will develop methods to understand cellular processes and we will develop and validate methods for the application of AMS in human studies, which is a growing area of demand by collaborators and service users. In addition, we will continue to support new and ongoing collaborative and service projects that require the capabilities of the Resource. The Center will continue to train researchers in the use of the AMS capabilities being developed, and the results of all efforts will be widely disseminated to advance progress in biomedical research. Towards these goals, our specific aims are to:1.) Increase the value and information content of AMS measurements by combining molecular speciation with quantitation of defined macromolecular isolates. Specifically, develop and validate methods for macromolecule labeling, characterization and quantitation.2.) Develop and validate methods and strategies to enable AMS to become more broadly used in human studies. Specifically, demonstrate robust methods for conducting pharmacokinetic/pharmacodynamics studies in humans and model systems.3.) Increase the accessibility of AMS to the Biomedical research community and the throughput of AMS through direct coupling to separatory

Mémoire des camps américains. L’exemple japonais

Directory of Open Access Journals (Sweden)

Élise Prébin

2007-06-01

Full Text Available Aujourd’hui, d’après les entretiens que j’ai pu effectuer, les Japonais-Américains se considèrent comme relativement bien intégrés à la population américaine. Pourtant, ils furent victimes par le passé d’une discrimination unique dans l’histoire des États-Unis. Après l’attaque de Pearl Harbor (7 décembre 1941, tous les immigrants d’origine japonaise, citoyens américains ou non, reçurent l’ordre d’évacuer leur lieu de résidence en vertu du décret du 18 février 1942 (Executive Order 9066, dès...

Bacillus subtilis generates a major specific deletion in pAM beta 1.

OpenAIRE

van der Lelie, D; Venema, G

1987-01-01

pAM beta 1, a 26.5-kilobase plasmid originally isolated from Streptococcus faecalis, was conjugally transferred from Streptococcus lactis to Bacillus subtilis. No conjugal transfer of pAM beta 1 from B. subtilis to S. lactis was observed. In addition, pAM beta 1 which had been reintroduced in S. lactis after cycling through B. subtilis had lost its conjugal transferability to Streptococcus cremoris, although under the same conditions noncycled pAM beta 1 was transferred at high efficiency. Re...

Innovative Instructional Tools from the AMS

Science.gov (United States)

Abshire, W. E.; Geer, I. W.; Mills, E. W.; Nugnes, K. A.; Stimach, A. E.

2016-12-01

Since 1996, the American Meteorological Society (AMS) has been developing online educational materials with dynamic features that engage students and encourage additional exploration of various concepts. Most recently, AMS transitioned its etextbooks to webBooks. Now accessible anywhere with internet access, webBooks can be read with any web browser. Prior versions of AMS etextbooks were difficult to use in a lab setting, however webBooks are much easier to use and no longer a hurdle to learning. Additionally, AMS eInvestigations Manuals, also in webBook format, include labs with innovative features and educational tools. One such example is the AMS Climate at a Glance (CAG) app that draws data from NOAA's Climate at a Glance website. The user selects historical data of a given parameter and the app calculates various statistics revealing whether or not the results are consistent with climate change. These results allow users to distinguish between climate variability and climate change. This can be done for hundreds of locations across the U.S. and on multiple time scales. Another innovative educational tool used in AMS eInvestigations Manuals is the AMS Conceptual Climate Energy Model (CCEM). The CCEM is a computer simulation designed to enable users to track the paths that units of energy might follow as they enter, move through and exit an imaginary system according to simple rules applied to different scenarios. The purpose is to provide insight into the impacts of physical processes that operate in the real world. Finally, AMS educational materials take advantage of Google Earth imagery to reproduce the physical aspects of globes, allowing users to investigate spatial relationships in three dimensions. Google Earth imagery is used to explore tides, ocean bottom bathymetry and El Nino and La Nina. AMS will continue to develop innovative educational materials and tools as technology advances, to attract more students to the Earth sciences.

AMS: From the ISS to CERN

CERN Multimedia

Jordan Juras

2011-01-01

The week of 16 May 2011 saw the successful launch and installation of the Alpha Magnetic Spectrometer aboard the International Space Station. Only 4 minutes after the installation had been completed, cosmic event data started to be recorded and began its long journey from low Earth orbit to the newly constructed Payload Operations and Control Centre located on CERN's Prévessin site.    The AMS Control Room in the newly constructed Building 946 in CERN’s Prévessin site. Unlike the detectors around the LHC ring, the Alpha Magnetic Spectrometer (AMS) does not have the luxury of a physical connection to data-processing infrastructure. Instead, cosmic events and data on AMS itself must undergo a lengthy journey before they arrive at the Payload and Operations on the Control Centre (POCC - building 946 Prévessin site) of the AMS collaboration. A joint effort between NASA and CERN makes this transmission possible. “The Space Stat...

How AMS dating changed my life

International Nuclear Information System (INIS)

Spriggs, M.

2001-01-01

Accelerator mass spectrometry (AMS) radiocarbon dating was developed in the late 1970s. Remembering back to a time before AMS dating was available to archaeologists is a bit like trying to remember how we ever survived without desktop computers, email or automatic teller machines. My own particular interest in AMS dating was an inevitable offshoot from my long-established interest in chronometric hygiene, or 'getting the dates right'. In this paper I attempt to illustrate that accurate dating matters, by discussing some examples of AMS dating projects with which I have been involved over the last six years or so. In relation to these projects, AMS has given us the ability to date sites which we could not before. It has enabled us to provide more detailed stratigraphies when datable materials are rare. It has allowed us to date materials we could not date before, such as rock art pigments. It has been able to provide indications of the degree of site disturbance in the absence of other obvious forms of evidence. And it has allowed us to assess claims for the antiquity of particular material cultural types and faunal introductions. (author). 41 refs

Delirium Research: Where Am I?

Science.gov (United States)

... of this page please turn JavaScript on. Feature: Delirium Research Where Am I? Past Issues / Fall 2015 Table of Contents The overlooked danger of delirium in hospitals In his mid-80s, Jerry (not ...

The new LLNL AMS sample changer

International Nuclear Information System (INIS)

Roberts, M.L.; Norman, P.J.; Garibaldi, J.L.; Hornady, R.S.

1993-01-01

The Center for Accelerator Mass Spectrometry at LLNL has installed a new 64 position AMS sample changer on our spectrometer. This new sample changer has the capability of being controlled manually by an operator or automatically by the AMS data acquisition computer. Automatic control of the sample changer by the data acquisition system is a necessary step towards unattended AMS operation in our laboratory. The sample changer uses a fiber optic shaft encoder for rough rotational indexing of the sample wheel and a series of sequenced pneumatic cylinders for final mechanical indexing of the wheel and insertion and retraction of samples. Transit time from sample to sample varies from 4 s to 19 s, depending on distance moved. Final sample location can be set to within 50 microns on the x and y axis and within 100 microns in the z axis. Changing sample wheels on the new sample changer is also easier and faster than was possible on our previous sample changer and does not require the use of any tools

36Cl-AMS measurements with 3-MV tandem accelerator

International Nuclear Information System (INIS)

Wang Huijuan; Guan Yongjing; Zhang Wei; Jiang Shan; Ming He

2013-01-01

36 C- is one of the most interesting nuclides in accelerator mass spectrometry (AMS) measurements. The application of 36 Cl has been widely applied in various fields. All most all of 36 Cl AMS measurements at natural isotopic concentrations have yet been performed at tandem accelerator with 5 MV or higher terminal voltage. The measure improvement of 36 Cl and other medium heavy isotopes performed at 3 MV in AMS facilities is one of the hottest topics in AMS measurements. In order to increase the suppression factor of 36 S, the energy loss straggling and angular straggling of 36 Cl and 36 S ions in various counter gases (P10, isobutane and propane) were investigated. Some groundwater samples were measured with energy of 32 MeV, and the results were in good agreement with the result obtained with ion energy of 72 MeV. The results indicate that the approximate detection limit of 36 Cl in 3 MV AMS facility is 36 Cl/Cl=1 × 10 -14 , and the uncertainty is 30% when the sample with isotopic ration 36 Cl/Cl≈10 -13 . (authors)

AM Envelope. The potential of Additive Manufacturing for facade constructions

Directory of Open Access Journals (Sweden)

Holger Strauss

2017-11-01

Full Text Available This dissertation shows the potential of Additive Manufacturing (AM for the development of building envelopes: AM will change the way of designing facades, how we engineer and produce them. To achieve today’s demands from those future envelopes, we have to find new solutions. New technologies offer one possible way to do so. They open new approaches in designing, producing and processing building construction and facades. Finding the one capable of having big impact is difficult – Additive Manufacturing is one possible answer. The term ‘AM Envelope’ (Additive Manufacturing Envelope describes the transfer of this technology to the building envelope. Additive Fabrication is a building block that aids in developing the building envelope from a mere space enclosure to a dynamic building envelope. First beginnings of AM facade construction show up when dealing with relevant aspects like material consumption, mounting or part’s performance. From those starting points several parts of an existing post-and-beam façade system were optimized, aiming toward the implementation of AM into the production chain. Enhancements on all different levels of production were achieved: storing, producing, mounting and performance. AM offers the opportunity to manufacture facades ‘just in time’. It is no longer necessary to store or produce large numbers of parts in advance. Initial investment for tooling can be avoided, as design improvements can be realized within the dataset of the AM part. AM is based on ‘tool-less’ production, all parts can be further developed with every new generation. Producing tool-less also allows for new shapes and functional parts in small batch sizes – down to batch size one. The parts performance can be re-interpreted based on the demands within the system, not based on the limitations of conventional manufacturing. AM offers new ways of materializing the physical part around its function. It leads toward customized

Differential spatio-temporal expression of carotenoid cleavage dioxygenases regulates apocarotenoid fluxes during AM symbiosis.

Science.gov (United States)

López-Ráez, Juan A; Fernández, Iván; García, Juan M; Berrio, Estefanía; Bonfante, Paola; Walter, Michael H; Pozo, María J

2015-01-01

Apocarotenoids are a class of compounds that play important roles in nature. In recent years, a prominent role for these compounds in arbuscular mycorrhizal (AM) symbiosis has been shown. They are derived from carotenoids by the action of the carotenoid cleavage dioxygenase (CCD) enzyme family. In the present study, using tomato as a model, the spatio-temporal expression pattern of the CCD genes during AM symbiosis establishment and functioning was investigated. In addition, the levels of the apocarotenoids strigolactones (SLs), C13 α-ionol and C14 mycorradicin (C13/C14) derivatives were analyzed. The results suggest an increase in SLs promoted by the presence of the AM fungus at the early stages of the interaction, which correlated with an induction of the SL biosynthesis gene SlCCD7. At later stages, induction of SlCCD7 and SlCCD1 expression in arbusculated cells promoted the production of C13/C14 apocarotenoid derivatives. We show here that the biosynthesis of apocarotenoids during AM symbiosis is finely regulated throughout the entire process at the gene expression level, and that CCD7 constitutes a key player in this regulation. Once the symbiosis is established, apocarotenoid flux would be turned towards the production of C13/C14 derivatives, thus reducing SL biosynthesis and maintaining a functional symbiosis. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

Droit administratif international - amélioration des rapports ...

International Development Research Centre (IDRC) Digital Library (Canada)

Le nouveau site Web facilitera l'enregistrement des événements démographiques afin d'améliorer l'accès aux services pour tous. Le nouveau site Web et la nouvelle bibliothèque de ressources aideront à améliorer les systèmes d'information et d'enregistrement des faits d'état civil dans les pays en développement.

36Cl AMS measurement with 3 MV tandem accelerator

International Nuclear Information System (INIS)

Wang Huijuan; Guan Yongjing; Zhang Wei; Jiang Shan; He Ming

2012-01-01

Developing the 36 Cl and other medium heavy isotopes measurement at 3 MV AMS facilities is one of the vital trends in AMS measurement. To further increase suppression factor of 36 S, the energy loss straggling and angular straggling of 36 C1 and 36 S ions in various counter gases (Pl0, isobutane and propane) were investigated. Some water samples were measured with the energy of 32 MeV, the results are in good agreement with the result by ion energy of 72 MeV. The results indicate that the detection limit of 36 C1 with 3 MV AMS facility is approximately 36 Cl/Cl ≈ l0 -14 , and the uncertainty is 30% for the sample with isotopic ration 36 Cl/Cl ≈ lO -13 . (authors)

Uptake and intracellular activity of AM-1155 in phagocytic cells.

Science.gov (United States)

Yamamoto, T; Kusajima, H; Hosaka, M; Fukuda, H; Oomori, Y; Shinoda, H

1996-01-01

The uptake and intracellular activity of AM-1155 in murine J774.1 macrophages and human polymorphonuclear leukocytes were investigated. AM-1155 penetrated phagocytic cells rapidly and reversibly, although the penetration process was not affected by metabolic inhibitors such as sodium fluoride, cyanide m-chlorophenylhydrazone, or ouabain or by nucleoside transport system inhibitors such as adenosine. The intracellular concentration-to-extracellular concentration ratio of AM-1155 in both cell types of phagocytes ranged from 5 to 7. These ratios were almost equal to those for sparfloxacin. The intracellular activity of AM-1155 in J774.1 macrophages, examined with Staphylococcus aureus 209P as a test bacterium, was dependent on the extracellular concentration. AM-1155 at a concentration of 1 microgram/ml reduced the number of viable cells of S. aureus ingested by more than 90%. The intracellular activity of AM-1155 was more potent than those of sparfloxacin, ofloxacin, ciprofloxacin, flomoxef, and erythromycin. These results suggest that the potent intracellular activity of AM-1155 might mainly be due to the high intracellular concentration and its potent in vitro activity. PMID:9124835

The AMS-02 experiment status

International Nuclear Information System (INIS)

Oliva, A.

2011-01-01

The Alpha Magnetic Spectrometer (AMS) is a high-energy physics experiment built to operate in space. The prototype of the AMS detector was AMS-01, fown in1998 on-board of the space shuttle Discovery (missionSTS-91). Starting from the experience acquired in the high successful AMS-01 mission the detector AMS-02 has been designed improving the AMS-01 energetic range, geometric acceptance and particle identifcation capabilities. In 2010 the AMS-02 detector has been validated for the space/scientifc operations by means of a wide test campaign(including beam tests, TVT test and EMI test). A major change in the design of AMS-02 has been decided after the thermo-vacuum test to extend as much aspossible the endurance of the experiment, profiting also of the extended endurance of the International Space Station (ISS) program toward 2020. The final AMS-02 configuration has been integrated during summer 2010, then tested on the H8 beam-line at CERN, and finally delivered to the launch site (Kennedy Space Center, Florida) at the end of August. AMS-02 is planned to be installed on the International Space Station in 2011 by the space shuttle Endeavour (mission STS-134).

As Estimativas de Pobreza na América Latina são Confiáveis?

OpenAIRE

Sanjay G. Reddy

2008-01-01

Qual é o nível de pobreza monetária na América Latina e tem tal nível diminuído recentemente? As estimativas atuais são confiáveis? A abordagem dominante de aferição da pobreza monetária, regional e globalmente, utiliza as linhas internacionais de pobreza do Banco Mundial de ?um dólar diário? e ?dois dólares diários? por pessoa. O Banco utiliza os indicadores de ?paridade do poder de compra? (PPC) para converter essas linhas internacionais em moedas locais. (...)

DELLA proteins regulate expression of a subset of AM symbiosis-induced genes in Medicago truncatula.

Science.gov (United States)

Floss, Daniela S; Lévesque-Tremblay, Véronique; Park, Hee-Jin; Harrison, Maria J

2016-01-01

The majority of the vascular flowering plants form symbiotic associations with fungi from the phylum Glomeromycota through which both partners gain access to nutrients, either mineral nutrients in the case of the plant, or carbon, in the case of the fungus. (1) The association develops in the roots and requires substantial remodeling of the root cortical cells where branched fungal hyphae, called arbuscules, are housed in a new membrane-bound apoplastic compartment. (2) Nutrient exchange between the symbionts occurs over this interface and its development and maintenance is critical for symbiosis. Previously, we showed that DELLA proteins, which are well known as repressors of gibberellic acid signaling, also regulate development of AM symbiosis and are necessary to enable arbuscule development. (3) Furthermore, constitutive overexpression of a dominant DELLA protein (della1-Δ18) is sufficient to induce transcripts of several AM symbiosis-induced genes, even in the absence of the fungal symbiont. (4) Here we further extend this approach and identify AM symbiosis genes that respond transcriptionally to constitutive expression of a dominant DELLA protein and also genes that do respond to this treatment. Additionally, we demonstrate that DELLAs interact with REQUIRED FOR ARBUSCULE DEVELOPMENT 1 (RAD1) which further extends our knowledge of GRAS factor complexes that have the potential to regulate gene expression during AM symbiosis.

A new BPM-TOF system for CologneAMS

Energy Technology Data Exchange (ETDEWEB)

Pascovici, Gheorghe; Dewald, Alfred; Heinze, Stefan; Schiffer, Markus; Feuerstein, Mark [CologneAMS, Universitaet Koeln (Germany); Pfeiffer, Michael; Jolie, Jan; Zell, Karl Oskar [IKP, Universitaet Koeln (Germany); Blanckenburg, Friedhelm von [GFZ, Potsdam (Germany)

2011-07-01

At the center for accelerator mass spectrometry (CologneAMS) a complex beam detector consisting of a high resolution Beam Profile Monitor (BPM) and a Time of Flight (TOF) spectrometer with tracking capabilities was designed especially for the needs of the Cologne AMS facility. The complex beam detector assembly is designed to match the beam specifications of the 6MV Tandetron AMS setup and its DAQ system, which is presently in the commissioning phase at the IKP of the University of Cologne. The BPM-TOF system will have a reconfigurable structure, namely: either a very fast TOF subsystem with a small active area or a more complex BPM -TOF detector with beam tracking capabilities and with a large active area. The systems aims for background suppression in case of the spectrometry of heavy ions, e.g. U, Cm, Pu, Am etc. and could also be used as an additional filter e.g., for the isobar {sup 36}S in case of the spectrometry of {sup 36}Cl.

AMS National Reachback Capability - New Tools for Helping Emergency Responders

International Nuclear Information System (INIS)

Wasiolek, Piotr; Lyons, Craig

2008-01-01

The Remote Sensing Laboratory's (RSL) Aerial Measuring System (AMS) is one of the emergency response assets belonging to the U.S. Department of Energy (DOE) National Nuclear Security Administration (NNSA). The AMS is used to detect, measure, and track radioactive material before and during emergencies to locate sources or determine contamination levels. Since September 11, 2001, increasing numbers of local, state, and federal entities have developed aerial radiation detection capabilities. NNSA has recognized a need by these entities for an AMS Reachback Center that would provide training and assistance on all aspects of AMS. The Center will assist local, state, and federal agencies in establishing the skills, resources, and training needed for a successful AMS regional operation. Beginning in January 2008, and continuing through April 2008, a pilot program was created in collaboration between NNSA and the U.S. Department of Homeland Security's Domestic Nuclear Detection Office (DNDO). The purpose of this collaboration was to provide aerial radiological surveillance and equipment technique training to local law enforcement offices in four major U.S. cities: Chicago, Washington DC, New York, and Los Angeles. The Mobile Aerial Radiological Surveillance (MARS) training curriculum was jointly developed by NNSA and DNDO headquarters and NNSA support teams. A total of 44 students participated in the training events held during this period. The positive reaction to this program has led to the establishment of the RSL as the headquarters for the National Aerial Measuring System Reachback (NAMSR) Center. The NAMSR Center will provide an AMS Home Team stand-by duty team for local, state, and federal agencies to discuss, plan, and analyze available data for aerial responses. An additional role of the Center will be to serve as the source of subject matter experts (SME) for the training of newly established aerial radiological monitoring assets. The purpose of this paper is to

Caractérisation du séchage convectif de la variété de mangue Amélie

African Journals Online (AJOL)

Dans cette étude, une caractérisation du séchage convectif de la variété de mangue « Amélie » est réalisée à travers l'établissement des cinétiques de séchage de 50°C à 70°C et de l'isotherme de désorption à 40°C. La diffusivité effective est identifiée et varie de 0,75x10-9m².s-1 à 50°C, à 1,07x10-9m².s-1 à 60°C et 1 ...

Écritures dans les Amériques au féminin

OpenAIRE

Alexoae-Zagni, Nicoleta; Anderson-González, Maya; Carrière, Marie; Clarke, Deborah; Courau, Thérèse; Dufaure, Sarah; Durrans, Stéphanie; Faubert, Samantha; Goodman, Audrey; Guicharnaud-Tollis, Michèle; Lauwers, Margot; Lepage, Caroline; Magras, Romain; Manera, Giulia; Marchio, Julie

2017-01-01

Issue d’un congrès de l’Institut des Amériques (IdA) organisé à Aix-Marseille Université sur le thème « Femmes dans les Amériques », la vingtaine d’études réunies dans cet ouvrage examine de quelle manière les femmes écrivains confrontent leur écriture à la représentation d’une « expérience américaine » pour en exposer les anxiétés, les failles ou les parasitages idéologiques et fantasmatiques en recourant à une subjectivité féminine travaillée par l’altérité. L’objectif d’ensemble n’est en ...

Additive Manufacturing (AM) in Expeditionary Operations: Current Needs, Technical Challenges, and Opportunities

Science.gov (United States)

2016-06-01

REPORT TYPE AND DATES COVERED Master’s Thesis 06-30-2014 to 06-17-2016 4. TITLE AND SUBTITLE ADDITIVE MANUFACTURING (AM) IN EXPEDITIONARY OPERATIONS: CUR...CODE 13. ABSTRACT (maximum 200 words) Additive manufacturing (AM), or 3D printing, is poised to change the world of military expeditionary operations...unlimited ADDITIVE MANUFACTURING (AM) IN EXPEDITIONARY OPERATIONS: CURRENT NEEDS, TECHNICAL CHALLENGES, AND OPPORTUNITIES Matthew Daniel Friedell Captain

Measurements of neutron cross section of the {sup 243}Am(n,{gamma}){sup 244}Am reaction

Energy Technology Data Exchange (ETDEWEB)

Hatsukawa, Yuichi; Shinohara, Nobuo; Hata, Kentaro [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

1998-03-01

The effective thermal neutron cross section of {sup 243}Am(n,{gamma}){sup 244}Am reaction was measured by the activation method. Highly-purified {sup 243}Am target was irradiated in an aluminum capsule by using a research reactor JRR-3M. The tentative effective thermal neutron cross sections are 3.92 b, and 84.44 b for the production of {sup 244g}Am and {sup 244m}Am, respectively. (author)

Effects of naturally occurring aquatic organic fractions on 241Am uptake by Scenedesmus obliquus (Chlorophyceae) and Aeromonas hydrophila (Pseudomonadaceae)

International Nuclear Information System (INIS)

Giesy, J.P. Jr.; Paine, D.

1977-01-01

Naturally occurring organics were extracted from water collected from Skinface Pond near Aiken, S.C. Organics were separated into four nominal diameter size fractions (I, greater than 0.0183; II, 0.0183 to 0.0032; III, 0.0032 to 0.0009; IV, less than 0.0009 μm) by membrane ultrafiltration and introduced into Scenedesmus obliquus and Aeromonas hydrophila cultures to determine their effects on 241 Am availability for uptake. Effects on 241 Am uptake were determined in actively growing S. obliquus cultures after 96 h of growth and in dense cultures of nongrowing cells after 4 h. Uptake by A. hydrophila was determined after 4 and 24 h in actively growing cultures. All organic fractions stimulated S. obliquus growth, with the most pronounced effects due to larger organic fractions, whereas no apparent growth stimulation of A. hydrophila was observed for any organic fraction. For both long-term and short-term studies, cellular 241 Am concentration (picocuries/cell) increased with increasing 241 Am concentration for S. obliquus and A. hydrophila. Fraction IV increased 241 Am uptake by both S. obliquus and A. hydrophila during 4-h incubations. During 96-h incubations fraction I was flocculated and cosedimented, with S. obliquus and A. hydrophila cells causing an apparent increase in 241 Am uptake. Fractions II and III reduced apparent 241 Am uptake by S. obliquus as a result of biological dilution caused by increased algal growth due to the organics. Fraction IV caused a reduction in 241 Am uptake by S. obliquus not attributable to biological dilution. Organics increased 241 Am uptake by A. hydrophila during 4- and 24-h incubations. A. hydrophila also caused flocculation of fraction I during 96-h incubations

Democracia y participación en América Latina

Directory of Open Access Journals (Sweden)

Gustavo Ernesto Emmerich

2000-01-01

Full Text Available Este ensayo se ocupa de la evolución histórica de la democracia y la participación política en América Latina, y delinea algunas posibilidades futuras al respecto. Primeramente examina algunos rasgos de la cultura de sumisión y de la profunda desigualdad social y política que desde la Colonia (e incluso antes caracterizó a muchas naciones de la región, y los compara con algunos aspectos de la cultura política predominante en Estados Unidos de América y Canadá. Luego, señala que en los ultimos años del siglo XX en América Latina se han fortalecido tanto las instituciones democráticas como una nueva cultura de participación, aunque considera necesario fundar nuevos pactos sociales que contribuyan a crear condiciones económicas y sociales más equitativas, como base y finalidad de la democracia y la participación.. Finalmente, sugiere que el liberalismo social, el socialismo democrático y el humanismo cristiano son las principales familias filosófico-políticas que podrían aportar -desde sus diversas perspectivas- a la consolidación de la democracia y a la creación de sociedades más participativas y más equitativas en América Latina.

Beneficial uses of 241Am

International Nuclear Information System (INIS)

Mangeng, C.A.; Thayer, G.R.

1984-05-01

This report assesses the uses of 241 Am and the associated costs and supply. The study shows that 241 Am-fueled radioisotope thermoelectric generators in the range of 1 to 5 W electrical provide the most promising use of kilogram amounts of this isotope. For medical uses, where purity is essential, irradiation of 241 Am can produce 97% pure 238 Pu at $21,000/g. Using a pyro-metallurgical process, 241 Am could be recovered from molten salt extraction (MSE) residues at an estimated incremental cost of $83/g adjusted to reflect the disposal costs of waste products. This cost of recovery is less than the $300/g cost for disposal of the 241 Am contained in the MSE residues

Nickel remediation by AM-colonized sunflower.

Science.gov (United States)

Ker, Keomany; Charest, Christiane

2010-08-01

This greenhouse study aimed to examine the contribution of arbuscular mycorrhizal (AM) colonization on the uptake of and tolerance to nickel (Ni) in sunflower (Helianthus annuus L.). We hypothesized that AM colonization increases Ni content and tolerance in sunflower grown under varying soil Ni concentrations. The combined effect of AM colonization and soil Ni input on the assimilation of nitrogen, in particular the activity of glutamine synthetase (GS), in sunflower plants was also investigated. A factorial experimental design was performed with sunflower cv. Lemon Queen, with or without the AM fungus, Glomus intraradices Schenck & Smith, and treated with 0, 100, 200, or 400 mg Ni kg(-1) dry soil (DS). The AM colonization significantly enhanced plant growth and Ni content, especially at the lower soil Ni treatments. Furthermore, the AM plants exposed to the highest soil Ni level of 400 mg Ni kg(-1) DS had a significantly higher shoot Ni extracted percentage than non-AM plants, suggesting that the AM symbiosis contributed to Ni uptake, then its translocation from roots to shoots. The AM colonization also significantly increased the GS activity in roots, this being likely an indicator of an enhanced Ni tolerance. These findings support the hypothesis that AM symbiosis contributes to an enhanced Ni plant uptake and tolerance and should be considered as part of phytoremediation strategies.

Evaluation of neutron nuclear data for 241Am and 243Am

International Nuclear Information System (INIS)

Kikuchi, Yasuyuki

1982-08-01

Neutron nuclear data of 241 Am and 243 Am were evaluated for JENDL-2. Evaluated quantities are the total, elastic and inelastic scattering, fission, capture, (n,2n), (n,3n) and (n,4n) reaction cross sections, the resolved and unresolved resonance parameters, the angular or energy distribution of the emitted neutrons, and the average number of neutrons emitted per fission. The fission cross section was evaluated on the basis of newly measured data, and lower values than JENDL-1 were given in the subthreshold energy region. The reliability of the calculation parameters are also much improved, because experimental data became available for the total and capture cross sections of 241 Am in the high energy region. (author)

Introduction to the AMS Experiment

CERN Multimedia

CERN. Geneva

2015-01-01

Following the pioneering experiments (ATIC, BESS, CREAM, HEAT, PAMELA, …), using a magnetic spectrometer (AMS) on ISS is a unique way to provide precision long term measurements of primordial high energy charged cosmic rays. AMS was installed on the Station in May 2011. Up to now, 60 billion events have been collected. 40 billion events have been partially analysed. AMS is scheduled to be on the Station until at least 2024. By then AMS will have collected close to 200 billion events. The detector properties and the analysis methods will be introduced.

Racismo e xenofobia nos Estados Unidos da América

OpenAIRE

Gomes, Nancy

2001-01-01

A história dos Estados Unidos de América (EUA) é uma história de imigração e diversidade. Quando Cristóvão Colombo chegou à América no ano de 1492, cerca de um milhão e meio de americanos nativos viviam nesta parte do continente. Durante os 200 anos seguintes, pessoas de diversos países europeus seguiram Colombo através do Atlântico para explorar a América e estabelecer as colónias e o derivado comércio. Os ingleses foram o grupo étnico dominante entre os primitivos colonos e o inglês convert...

X-ray photoelectron spectra structure and chemical bonding in AmO2

Directory of Open Access Journals (Sweden)

Teterin Yury A.

2015-01-01

Full Text Available Quantitative analysis was done of the X-ray photoelectron spectra structure in the binding energy range of 0 eV to ~35 eV for americium dioxide (AmO2 valence electrons. The binding energies and structure of the core electronic shells (~35 eV-1250 eV, as well as the relativistic discrete variation calculation results for the Am63O216 and AmO8 (D4h cluster reflecting Am close environment in AmO2 were taken into account. The experimental data show that the many-body effects and the multiplet splitting contribute to the spectral structure much less than the effects of formation of the outer (0-~15 eV binding energy and the inner (~15 eV-~35 eV binding energy valence molecular orbitals. The filled Am 5f electronic states were shown to form in the AmO2 valence band. The Am 6p electrons participate in formation of both the inner and the outer valence molecular orbitals (bands. The filled Am 6p3/2 and the O 2s electronic shells were found to make the largest contributions to the formation of the inner valence molecular orbitals. Contributions of electrons from different molecular orbitals to the chemical bond in the AmO8 cluster were evaluated. Composition and sequence order of molecular orbitals in the binding energy range 0-~35 eV in AmO2 were established. The experimental and theoretical data allowed a quantitative scheme of molecular orbitals for AmO2, which is fundamental for both understanding the chemical bond nature in americium dioxide and the interpretation of other X-ray spectra of AmO2.

The LLNL AMS facility

International Nuclear Information System (INIS)

Roberts, M.L.; Bench, G.S.; Brown, T.A.

1996-05-01

The AMS facility at Lawrence Livermore National Laboratory (LLNL) routinely measures the isotopes 3 H, 7 Be, 10 Be, 14 C, 26 Al, 36 Cl, 41 Ca, 59,63 Ni, and 129 I. During the past two years, over 30,000 research samples have been measured. Of these samples, approximately 30% were for 14 C bioscience tracer studies, 45% were 14 C samples for archaeology and the geosciences, and the other isotopes constitute the remaining 25%. During the past two years at LLNL, a significant amount of work has gone into the development of the Projectile X-ray AMS (PXAMS) technique. PXAMS uses induced characteristic x-rays to discriminate against competing atomic isobars. PXAMS has been most fully developed for 63 Ni but shows promise for the measurement of several other long lived isotopes. During the past year LLNL has also conducted an 129 I interlaboratory comparison exercise. Recent hardware changes at the LLNL AMS facility include the installation and testing of a new thermal emission ion source, a new multianode gas ionization detector for general AMS use, re-alignment of the vacuum tank of the first of the two magnets that make up the high energy spectrometer, and a new cryo-vacuum system for the AMS ion source. In addition, they have begun design studies and carried out tests for a new high-resolution injector and a new beamline for heavy element AMS

Absurd Dignity: The Rebel and His Cause in Améry and Camus

Directory of Open Access Journals (Sweden)

Ingrid Anderson

2017-02-01

Full Text Available In “On the Necessity and Impossibility of Being a Jew,” Jean Améry admits that in Europe, “the degradation of the Jews was...identical with the death threat long before Auschwitz. In this regard, Jean-Paul Sartre, already in...his book Anti-Semite and Jew, offered a few perceptions that are still valid today.” In no uncertain terms, Améry aligns his own project to “describe the...unchanging...condition” of the Reich’s victims with Sartre’s 1946 book on anti-Semitism, a philosophical gesture that was not uncommon for left- leaning Jewish intellectuals after the war. According to Robert Misrahi, who discusses at length what he calls Sartre’s “evident good will,” “his manifest care to render justice, and his desire, in the face of the Jews’ great suffering, to address himself to them,” Anti-Semite and Jew was primarily a “powerful affirmation of sympathy” for European Jews and, moreover, “an effective weapon against anti-Semitism.” Misrahi insists that French Jews were “astonished, even stunned for what we (Jews were used to was hatred and contempt.” Sartre’s repeated assertions that the suffering of European Jewry was undeserved and unwarranted, are underscored by his declaration that Europe’s problem was not, after all, ‘the Jew’ but the anti-Semite, whose sadistic Manichaeism and profound fear of himself and his own instincts and responsibilities, had inverted European values so profoundly as to make genocide ethical. And although Sartre repeatedly emphasizes his intention to analyze primarily the situation of French Jews, he does not fail to connect European anti-Semitism with other forms of racialized hatred; ‘the Jew’ is only a “pretext,” since “elsewhere [the anti-Semite’s] counterpart will make use of the Negro or the man of yellow skin” because anti-Semitism, “in short, is fear of the human condition.” Given the profound radicalism of such declarations at the time

Gerai moderuotas pokalbis apie Kantą : rec. kn.: Baranova J. XX a. amžiaus moralės filosofija: pokalbis su Kantu

OpenAIRE

Norkus, Zenonas

2005-01-01

The review discusses Jūratė Baranova’s monograph “XX Amžiaus Moralės Filosofija: Pokalbis su Kantu" (Vilnius: VPU leidykla, 2004). The book succeeds in highlighting the explicit and implicit, positive and negative dependence of ethics theories of the 20th century on Immanuel Kant as the common denominator of the said theories, relating very different and, at first glance, completely unrelated theories: British analytical mathematics, modern Anglo-Saxon Neo-Aristotelian and neo-Hegelian ethic ...

Disturbance from Am-241 Photons of the Cellular Dose by Am-241 Alpha Emissions: Am-241 as an alternative source of alpha particles to radon daughters

International Nuclear Information System (INIS)

Lee, Ki-Man; Kim, Eun-Hee

2015-01-01

The Radiation Bioengineering Laboratory (RadBio Lab) at Seoul National University (SNU) has built an Am-241 alpha particle irradiator for study of cellular responses to radiation from radon daughters. The radon daughters of concern that cause internal exposure from inhalation of radon-contaminated air are Po-218, Po-214 and Po-210. In their alpha decay schemes, the yields of photon emissions are negligible. Unfortunately, Am-241, the source of alpha irradiator in RadBio Lab, emits photons at every alpha decay while transforming to Np-237 of long half-life. Employing Am-241 as the source simulating radon daughters, therefore, requires that photon emissions from Am-241 be specified in term of dose contribution. In this study, Monte Carlo calculations have been made to characterize dose contributions of Am-241 photon emissions. This study confirms that disturbance from Am-241 photon emissions of the cellular dose by Am-241 alpha emissions is negligible. Dose contamination fraction from photon emissions was 8.02 .. 10 -6 at 25 mm SSD at maximum. Also, note that LET in tissue-equivalent medium varies within about 20% for alpha particles at energies over 5 MeV

Getting AM Up to SpeedAcross the Army Life Cycle

Science.gov (United States)

2016-12-01

Getting AM Up to Speed Across the Army Life Cycle Stacey L. Clark Clark is deputy director of Systems Engineering for the U.S. Army Research...In general, the Army is interested in the promise of AM for the following reasons : • Point-of-use manufacturing—the ability to produce spare parts...acquisition domain, more engi- neering work is needed to better define what standards should be used in Data Item Descriptions (DID) and Contract Data

Crise du virus Ebola : Améliorer la communication scientifique et le ...

International Development Research Centre (IDRC) Digital Library (Canada)

Crise du virus Ebola : Améliorer la communication scientifique et le journalisme local en période d'urgence et après une éclosion. La World Federation of Science Journalists (WFSJ) dirige un programme régional de communication et de formation pour les journalistes locaux, dans le but d'améliorer le journalisme ...

Design of a graphite-moderated {sup 241}Am-Li neutron field to simulate reactor spectra

Energy Technology Data Exchange (ETDEWEB)

Tsujimura, N., E-mail: tsujimura.norio@jaea.go.j [Nuclear Fuel Cycle Engineering Laboratories, Japan Atomic Energy Agency, 4-33, Tokai-mura, Ibaraki-ken, 319-1194 (Japan); Yoshida, T. [Nuclear Fuel Cycle Engineering Laboratories, Japan Atomic Energy Agency, 4-33, Tokai-mura, Ibaraki-ken, 319-1194 (Japan)

2010-12-15

A neutron calibration field using {sup 241}Am-Li sources and a moderator was designed to simulate the neutron fields found outside a reactor. The moderating assembly selected for the design calculation consists of a cube of graphite blocks with dimensions of 50 cm by 50 cm by 50 cm, in which the {sup 241}Am-Li sources are placed. Monte Carlo calculations revealed the optimal depth of the source to be 15 cm. This moderated neutron source can be used to provide a test field that has a large number of intermediate energy neutrons with a small portion of MeV component.

Buffet-Américain

Directory of Open Access Journals (Sweden)

Peter Szende

2013-04-01

Full Text Available The Exposition Universelle or World’s Fair held in Paris during 1855 was a catalyst for the creation of numerous related exhibits, attractions, and businesses in the neighborhoods surrounding the exhibition grounds. One of these was an innovative restaurant concept in which consumers could eat or drink while standing, known as a buffet-Américain or American buffet. This article features a reproduction of a vintage advertising poster for one such restaurant, created by the celebrated nineteenth century French commercial artist Jean Alexis Rouchon .

Tritium AMS for biomedical applications

International Nuclear Information System (INIS)

Roberts, M.L.; Velsko, C.; Turteltaub, K.W.

1993-08-01

We are developing 3 H-AMS to measure 3 H activity of mg-sized biological samples. LLNL has already successfully applied 14 C AMS to a variety of problems in the area of biomedical research. Development of 3 H AMS would greatly complement these studies. The ability to perform 3 H AMS measurements at sensitivities equivalent to those obtained for 14 C will allow us to perform experiments using compounds that are not readily available in 14 C-tagged form. A 3 H capability would also allow us to perform unique double-labeling experiments in which we learn the fate, distribution, and metabolism of separate fractions of biological compounds

Decorporation of 241Am in beagles by DTPA

International Nuclear Information System (INIS)

Lloyd, R.D.; McFarland, S.S.; Taylor, G.N.; Williams, J.L.; Mays, C.W.

1975-01-01

Chelation treatments using daily subcutaneous injections of ZnNa 3 -DTPA were begun 2 wk after the intravenous administration of 0.3 μCi/kg 241 Am citrate to six female beagles averaging 505 days of age. Retention of americium in the liver and in non-liver tissue (mainly skeleton) was followed serially in the living dogs by a combination of total-body and partial-body counting. During the first 13 mo of DTPA therapy, the removal of 241 Am from two dogs given one DTPA injection each day of 0.027 or 0.034 mmole/kg was similar to the fraction removed from two other dogs given a similar total of 0.035 or 0.037 mmole/kg/day in five fractionated injections each day. Increasing the daily amount of DTPA to 0.36 and 5.0 mmole/kg/day in the two remaining dogs only slightly increased the removal of 241 Am. At the beginning of chelation therapy, all six dogs averaged 43 percent of the injected 241 Am in the liver and 46 percent in nonliver tissue. 241 Am retention in liver at 2 mo of therapy was about 2 percent of pretreatment liver retention, decreased to roughly 1 percent of pretreatment retention by 5 mo of DTPA administration, and was undetectable at 13 months. Nonliver retention at 2 mo was 53 percent of pretreatment retention in nonliver tissue, at 5 mo averaged about 40 percent, and had decreased to 27 percent of pretreatment values by 13 mo of chelation therapy. In contrast, for beagles of our colony not treated with DTPA, 241 Am in the liver and in nonliver tissue exhibited a biological half-time in the order of 10 yr. (U.S.)

AMS in drug development at GSK

International Nuclear Information System (INIS)

Young, G.C.; Ellis, W.J.

2007-01-01

A history of the use of AMS in GSK studies spanning the last 8 years (1998-2005) is presented, including use in pilot studies through to clinical, animal and in vitro studies. A brief summary of the status of GSK's in-house AMS capability is outlined and views on the future of AMS in GSK are presented, including potential impact on drug development and potential advances in AMS technology

The D-D Neutron Generator as an Alternative to Am(Li) Isotopic Neutron Source in the Active Well Coincidence Counter

Energy Technology Data Exchange (ETDEWEB)

McElroy, Robert Dennis [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Cleveland, Steven L. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

2017-03-01

The ²³⁵U mass assay of bulk uranium items, such as oxide canisters, fuel pellets, and fuel assemblies, is not achievable by traditional gamma-ray assay techniques due to the limited penetration of the item by the characteristic ²³⁵U gamma rays. Instead, fast neutron interrogation methods such as active neutron coincidence counting must be used. For international safeguards applications, the most commonly used active neutron systems, the Active Well Coincidence Counter (AWCC), Uranium Neutron Collar (UNCL) and ²⁵²Cf Shuffler, rely on fast neutron interrogation using an isotopic neutron source [i.e., ²⁵²Cf or Am(Li)] to achieve better measurement accuracies than are possible using gamma-ray techniques for high-mass, high-density items. However, the Am(Li) sources required for the AWCC and UNCL systems are no longer manufactured, and newly produced systems rely on limited supplies of sources salvaged from disused instruments. The ²⁵²Cf shuffler systems rely on the use of high-output ²⁵²Cf sources, which while still available have become extremely costly for use in routine operations and require replacement every five to seven years. Lack of a suitable alternative neutron interrogation source would leave a potentially significant gap in the safeguarding of uranium processing facilities. In this work, we made use of Oak Ridge National Laboratory’s (ORNL’s) Large Volume Active Well Coincidence Counter (LV-AWCC) and a commercially available deuterium-deuterium (D-D) neutron generator to examine the potential of the D-D neutron generator as an alternative to the isotopic sources. We present the performance of the LV-AWCC with D-D generator for the assay of ²³⁵U based on the results of Monte Carlo N-Particle (MCNP) simulations and measurements of depleted uranium (DU), low enriched uranium (LEU), and highly enriched uranium (HEU) items.

Additive Manufacturing: Which DLA-Managed Legacy Parts are Potential AM Candidates

Science.gov (United States)

2016-07-01

R G ADDITIVE MANUFACTURING : WHICH DLA-MANAGED LEGACY PARTS ARE POTENTIAL AM CANDIDATES? REPORT DL501T1 J UL Y 2016...L Y 2 0 1 6 ADDITIVE MANUFACTURING : WHICH DLA-MANAGED LEGACY PARTS ARE POTENTIAL AM CANDIDATES? REPORT DL501T1 Thomas K . Pa rk s...DESIGNATED BY OTHER OFFICIAL DOCUMENTATION. LMI © 2016. ALL RIGHTS RESERVED. iii Additive Manufacturing : Which DLA-Managed Legacy Parts Are

L'enrichissement des sols et des semences permet d'améliorer la ...

International Development Research Centre (IDRC) Digital Library (Canada)

6 juin 2016 ... Grâce à des sols en meilleure santé et à l'utilisation de variétés améliorées, les agriculteurs du sud de l'Éthiopie ont multiplié par deux le rendement du pois chiche. L'amélioration des méthodes de transformation et de préparation de cet aliment, conjuguée à des programmes d'éducation, s'est traduite par ...

Gobernanza ambiental en América Latina

NARCIS (Netherlands)

de Castro, F.; Hogenboom, B.; Baud, M.

2015-01-01

En términos de recursos naturales América Latina es la región más rica del mundo. Las múltiples finalidades de la naturaleza -subsistencia para las comunidades, ingresos para los Estados, commodities para las compañías, y biodiversidad para los conservacionistas- han convertido la gobernanza

Américo Castro en Houston: 1955-59

Directory of Open Access Journals (Sweden)

Nancy F. MARINO

2009-11-01

Full Text Available A partir del año 1936 la vida del filólogo y profesor Américo Castro le lleva a tierras americanas, donde permanece como catedrático en varias universidades mientras escribe la mayoría de sus obras maestras. En 1936 es profesor en Buenos Aires, pero un año más tarde reanuda la carrera docente en Estados Unidos, primero en la Universidad de Wisconsin (1937-39, después en la de Tejas (1939-40, y por fin en Princeton donde se pasa más de veinte años. Su jubilación a los 68 años de edad se debe a la inflexibilidad del sistema que le obliga a retirarse, y no a su deseo de dejar de dar clases. Después de abandonar su cátedra en Princeton —aunque siempre mantendrá su hogar en esa ciudad a pesar de sus varias andanzas— D. Américo se va a Venezuela para dar una serie de conferencias y para seguir trabajando en sus obras.

Protección social en salud en América latina y el Caribe ...

International Development Research Centre (IDRC) Digital Library (Canada)

13 déc. 2010 ... Protección social en salud en América latina y el Caribe : Investigación y políticas. Couverture du livre Protección social en salud en América latina y el Caribe : Investigación y. Directeur(s) : Amparo Hernández Bello et Carmen Rico de Sotelo. Maison(s) d'édition : Editorial Pontificia Universidad Javeriana, ...

Yatarak fizyoterapi alan hastaların yaşam kaliteleri ve maliyet analizi

OpenAIRE

AKTAŞ, İlknur; KAPTANOĞLU YILDIRIM, Ayşegül; ÜNLÜ ÖZKAN, Feyza; YILMAZ KAYSIN, Meryem; ŞİLTE, Ayşe Duygu

2015-01-01

Amaç: Lokomotor sistem sorunları nedeniyle yatarak fizyoterapi alan hastaların yaşam kaliteleri ve maliyet analizlerini ortaya koymaktır. Hastalar ve Yöntem: Yatarak fizyoterapi alan olguların demografik verileri kaydedildi ve 15 D yaşam kalite sorgulaması yapıldı. Maliyetleri hesaplandı. Yaşam kalitesi ölçeği verilerini kullanarak hesaplanan, kaliteye ayarlanmış yaşam yılı (KAYY) sayısını kullanarak ekonomik analiz yapılmıştır. Bulgular: Doksan üç olgunun 75’i (%80,64) kadın, 18’i (%19,35) e...

DISCOVERY OF A NEW AM CVn SYSTEM WITH THE KEPLER SATELLITE

International Nuclear Information System (INIS)

Fontaine, G.; Brassard, P.; Dufour, P.; Bergeron, P.; Green, E. M.; Hubeny, I.; Guvenen, B.; O'Malley, C. J.; Charpinet, S.; Van Grootel, V.; Steeghs, D.; Marsh, T. R.; Aerts, C.; Oestensen, R. H.; Bloemen, S.; Randall, S. K.; Silvotti, R.; Howell, S. B.; Baran, A.; Kepler, S. O.

2011-01-01

We report the discovery of a new AM CVn system on the basis of broadband photometry obtained with the Kepler satellite supplemented by ground-based optical spectroscopy. Initially retained on Kepler target lists as a potential compact pulsator, the blue object SDSS J190817.07+394036.4 (KIC 004547333) has turned out to be a high-state AM CVn star showing the He-dominated spectrum of its accretion disk significantly reddened by interstellar absorption. We constructed new grids of NLTE synthetic spectra for accretion disks in order to analyze our spectroscopic observations. From this analysis, we infer preliminary estimates of the rate of mass transfer, the inclination angle of the disk, and the distance to the system. The AM CVn nature of the system is also evident in the Kepler light curve, from which we extracted 11 secure periodicities. The luminosity variations are dominated by a basic periodicity of 938.507 s, likely to correspond to a superhump modulation. The light curve folded on the period of 938.507 s exhibits a pulse shape that is very similar to the superhump wavefront seen in AM CVn itself, which is a high-state system and the prototype of the class. Our Fourier analysis also suggests the likely presence of a quasi-periodic oscillation similar to those already observed in some high-state AM CVn systems. Furthermore, some very low-frequency, low-amplitude aperiodic photometric activity is likely present, which is in line with what is expected in accreting binary systems. Inspired by previous work, we further looked for and found some intriguing numerical relationships between the 11 secure detected frequencies, in the sense that we can account for all of them in terms of only three basic clocks. This is further evidence in favor of the AM CVn nature of the system.

AMS analyses at ANSTO

International Nuclear Information System (INIS)

Lawson, E.M.

1998-01-01

The major use of ANTARES is Accelerator Mass Spectrometry (AMS) with 14 C being the most commonly analysed radioisotope - presently about 35 % of the available beam time on ANTARES is used for 14 C measurements. The accelerator measurements are supported by, and dependent on, a strong sample preparation section. The ANTARES AMS facility supports a wide range of investigations into fields such as global climate change, ice cores, oceanography, dendrochronology, anthropology, and classical and Australian archaeology. Described here are some examples of the ways in which AMS has been applied to support research into the archaeology, prehistory and culture of this continent's indigenous Aboriginal peoples. (author)

AMS Weather Studies and AMS Ocean Studies: Dynamic, College-Level Geoscience Courses Emphasizing Current Earth System Data

Science.gov (United States)

Brey, J. A.; Geer, I. W.; Moran, J. M.; Weinbeck, R. S.; Mills, E. W.; Blair, B. A.; Hopkins, E. J.; Kiley, T. P.; Ruwe, E. E.

2008-12-01

AMS Weather Studies and AMS Ocean Studies are introductory college-level courses developed by the American Meteorological Society, with NSF and NOAA support, for local offering at undergraduate institutions nationwide. The courses place students in a dynamic and highly motivational educational environment where they investigate the atmosphere and world ocean using real-world and real-time environmental data. Over 360 colleges throughout the United States have offered these courses in course environments ranging from traditional lecture/laboratory to completely online. AMS Diversity Projects aim to increase undergraduate student access to the geosciences through implementation of the courses at minority-serving institutions and training programs for MSI faculty. The AMS Weather Studies and AMS Ocean Studies course packages consist of a hard-cover, 15-chapter textbook, Investigations Manual with 30 lab-style activities, and course website containing weekly current weather and ocean investigations. Course instructors receive access to a faculty website and CD containing answer keys and course management system-compatible files, which allow full integration to a college's e-learning environment. The unique aspect of the courses is the focus on current Earth system data through weekly Current Weather Studies and Current Ocean Studies investigations written in real time and posted to the course website, as well as weekly news files and a daily weather summary for AMS Weather Studies. Students therefore study meteorology or oceanography as it happens, which creates a dynamic learning environment where student relate their experiences and observations to the course, and actively discuss the science with their instructor and classmates. With NSF support, AMS has held expenses-paid course implementation workshops for minority-serving institution faculty planning to offer AMS Weather Studies or AMS Ocean Studies. From May 2002-2007, AMS conducted week-long weather workshops

PedAM: a database for Pediatric Disease Annotation and Medicine.

Science.gov (United States)

Jia, Jinmeng; An, Zhongxin; Ming, Yue; Guo, Yongli; Li, Wei; Li, Xin; Liang, Yunxiang; Guo, Dongming; Tai, Jun; Chen, Geng; Jin, Yaqiong; Liu, Zhimei; Ni, Xin; Shi, Tieliu

2018-01-04

There is a significant number of children around the world suffering from the consequence of the misdiagnosis and ineffective treatment for various diseases. To facilitate the precision medicine in pediatrics, a database namely the Pediatric Disease Annotations & Medicines (PedAM) has been built to standardize and classify pediatric diseases. The PedAM integrates both biomedical resources and clinical data from Electronic Medical Records to support the development of computational tools, by which enables robust data analysis and integration. It also uses disease-manifestation (D-M) integrated from existing biomedical ontologies as prior knowledge to automatically recognize text-mined, D-M-specific syntactic patterns from 774 514 full-text articles and 8 848 796 abstracts in MEDLINE. Additionally, disease connections based on phenotypes or genes can be visualized on the web page of PedAM. Currently, the PedAM contains standardized 8528 pediatric disease terms (4542 unique disease concepts and 3986 synonyms) with eight annotation fields for each disease, including definition synonyms, gene, symptom, cross-reference (Xref), human phenotypes and its corresponding phenotypes in the mouse. The database PedAM is freely accessible at http://www.unimd.org/pedam/. © The Author(s) 2017. Published by Oxford University Press on behalf of Nucleic Acids Research.

AMS and controversies in history The Spanish conquest of Peru

CERN Document Server

Zoppi, U; Jacobsen, G; Laurencich-Minelli, L; Lawson, E M; Sarkisian, G; Tuniz, C

2000-01-01

The quest for understanding the past often contains a subjective component. Legends, myths, traditions and personal beliefs can unconsciously influence the interpretation of the scientific outcomes or, in the worst instances, even lead to forgery. Fortunately, an increasing number of scientific tools are available nowadays and can be combined to discredit such detriments and offer more reliable foundations for an objective analysis. Radiocarbon dating by AMS is a relatively non-invasive method and is particularly useful when valuable historical artefacts are involved. In this paper, we will present controversial cases where AMS is playing an important role in understanding the past. In particular, we will discuss the use of AMS to authenticate historical documents revealing a new version of the conquest of Peru by Pizarro in the early 1530s.

AMS and controversies in history: The Spanish conquest of Peru

International Nuclear Information System (INIS)

Zoppi, U.; Hua, Q.; Jacobsen, G.; Sarkissian, G.; Lawson, E.M.; Tuniz, C.; Laurencich Minelli, L.

2000-01-01

The quest for understanding the past often contains a subjective component. Legends, myths, traditions and personal beliefs can unconsciously influence the interpretation of the scientific outcomes or, in the worst instances, even lead to forgery. Fortunately, an increasing number of scientific tools are available nowadays and can be combined to discredit such detriments and offer more reliable foundations for an objective analysis. Radiocarbon dating by AMS is a relatively non-invasive method and is particularly useful when valuable historical artefacts are involved. In this paper, we will present controversial cases where AMS is playing an important role in understanding the past. In particular, we will discuss the use of AMS to authenticate historical documents revealing a new version of the conquest of Peru by Pizarro in the early 1530s

Vertical profiles of 239(240)Pu, 238Pu and 241Am in some peculiar Italian mosses

International Nuclear Information System (INIS)

Testa, C.; Desideri, D.; Guerra, F.; Meli, M.A.; Roselli, C.; Jia, G.; Degetto, S.

2000-01-01

During the last two years the Urbino University and the Padua ICTIMA CNR were working on a special radioecological program having the aim to study the Pu and Am retention behaviour in different species of mosses growing in two Italian regions (Urbino, Central Italy, 450 m a.s.l. and Alps region, Northern Italy, 1500 m a.s.l.). 239,240 Pu, 238 Pu and 241 Am were separated and determined by extraction chromatography, electroplating and alpha spectrometry; 242 Pu and 243 Am were used as the yield tracers. The paper summarizes the results dealing with the vertical profiles of the radionuclides in three different species of mosses. Several 1-2 cm high sections were obtained and dated by 210 Pb determination. Typical concentration peaks for Pu and Am were found for very old moss species ('Sphagnum Compactum' and 'Sphagnum Nemoreum') at a depth corresponding to the early 1960's which is the period characterized by the maximum nuclear weapon tests. In more recent moss species ('Neckeria Crispa') no peak was observed and the regression curves showed that Am is more mobile than Pu. (author)

Revisiting simplified dark matter models in terms of AMS-02 and Fermi-LAT

Science.gov (United States)

Li, Tong

2018-01-01

We perform an analysis of the simplified dark matter models in the light of cosmic ray observables by AMS-02 and Fermi-LAT. We assume fermion, scalar or vector dark matter particle with a leptophobic spin-0 mediator that couples only to Standard Model quarks and dark matter via scalar and/or pseudo-scalar bilinear. The propagation and injection parameters of cosmic rays are determined by the observed fluxes of nuclei from AMS-02. We find that the AMS-02 observations are consistent with the dark matter framework within the uncertainties. The AMS-02 antiproton data prefer 30 (50) GeV - 5 TeV dark matter mass and require an effective annihilation cross section in the region of 4 × 10-27 (7 × 10-27) - 4 × 10-24 cm3/s for the simplified fermion (scalar and vector) dark matter models. The cross sections below 2 × 10-26 cm3/s can evade the constraint from Fermi-LAT dwarf galaxies for about 100 GeV dark matter mass.

AMS Measurement of 36Cl with a Q3D Magnetic Spectrometer at CIAE

International Nuclear Information System (INIS)

Li Chaoli; He Ming; Wu Shaoyong; Li Zhenyu; Liu Jiancheng; Dong Kejun; Jiang Shan; Zhang Wei; He Xianwen

2012-01-01

The ratio of 36 Cl/Cl can determine the exposure age of surface rocks and monitor the secular equilibrium of 36 Cl of sedimentary and igneous rock in groundwater. Due to the uncertainty effects of different chemical separation processes for removing 36 S, there is a high degree of uncertainty in 36 Cl accelerator mass spectrometry (AMS) measurements if the ratio of 36 Cl/Cl is lower than 10 -14 . A 36 Cl AMS higher sensitivity measurement has been set up by using a ΔE-Q3D method at the China Institute of Atomic Energy (CIAE). The performances of ΔE-Q3D method for 36 Cl-AMS measurement had been systemically studied. The experimental results show that the ΔE-Q3D method has a higher isobar suppression factor. Taking advantage of direct removing 36 S, the sample preparation can be simplified and the uncertainty effects of different chemical separation processes can be reduced in 36 Cl AMS measurements.

Microstructural evolution and Am migration behaviour in Am-containing fuels at the initial stage of irradiation

International Nuclear Information System (INIS)

Tanaka, Kosuke; Miwa, Shuhei; Sato, Isamu; Osaka, Masahiko; Hirosawa, Takashi; Obayashi, Hiroshi; Koyama, Shin-ichi; Yoshimochi, Hiroshi; Tanaka, Kenya

2010-01-01

In order to investigate the effect of americium addition to MOX fuels on the irradiation behaviour, the 'Am-1' programme is being conducted in JAEA. The Am-1 programme consists of two short-term irradiation tests of 10-minute and 24-hour irradiations and a steady-state irradiation test. The short-term irradiation tests were successfully completed and the post-irradiation examinations (PIE) are in progress. The PIE for Am-containing MOX fuels focused on the microstructural evolution and redistribution behaviour of Am at the initial stage of irradiation and the results to date are reported. The successful development of fabrication technology with remote handling and the evaluation of thermo-chemical properties based on the out-of-pile experiments are described with an emphasis on the effects of Am addition on the MOX fuel properties. (authors)

Capacité de recherche accrue pour améliorer la gestion des ...

International Development Research Centre (IDRC) Digital Library (Canada)

Le nouveau site Web facilitera l'enregistrement des événements démographiques afin d'améliorer l'accès aux services pour tous. Le nouveau site Web et la nouvelle bibliothèque de ressources aideront à améliorer les systèmes d'information et d'enregistrement des faits d'état civil dans les pays en développement.

Corteza prefrontal, amígdala y estrés: estudio de la noradrenalina, corticosterona y memoria aversiva en la rata

OpenAIRE

Ronzoni Blázquez, Giacomo

2016-01-01

La interacción funcional entre la corteza prefrontal (CPF) y la amígdala así como la activación del eje hipotálamo-hipófisis-adrenal (HHA) y la liberación de catecolaminas en áreas límbicas del cerebro, juegan un papel clave tanto en la regulación de la respuesta fisiológica a estrés como en respuestas mal-adaptativas a estrés. El procesamiento de la información emocional a largo plazo, es otro de los mecanismos que contribuyen a la capacidad de los individuos para adaptarse a situaciones de ...

Les représentations du dieu Hermès et du couple Hestia-Hermès dans le cinéma américain des années 1930 à nos jours

OpenAIRE

Bloch , Jérôme

2012-01-01

ISBN 978-606-14-0550-3; International audience; S'inscrivant dans une démarche analytique et comparative, à la croisée de disciplines aussi fécondes que diversifiées -- l'histoire du cinéma, l'analyse filmique et littéraire, les gender studies... -- notre communication s'attache à dresser un panorama exhaustif des films américains mettant en scène la figure d'Hermès. Suivant une approche chronologique, notre démonstration s'appuie sur l'étude d'une dizaine de films produits sur le territoire ...

Overexpression of a modiifed AM79 aroA gene in transgenic maize confers high tolerance to glyphosate

Institute of Scientific and Technical Information of China (English)

REN Zhen-jing; CAO Gao-yi; ZHANG Yu-wen; LIU Yan; LIU Yun-jun

2015-01-01

It has previously been shown that a bacterial 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) encoding gene AM79 aroA can be a candidate gene to develop glyphosate-tolerant transgenic crops (Cao et al. 2012). In this study, AM79 aroA was redesigned using the plant biased codons and eliminating the motifs which would lead to the instability of mRNA, to create a synthetic gene that would be expressed highly in plant cel s. The redesigned and artiifcial y synthesized gene, named as mAM79, was cloned into plant expression vector pM3301UbiSpAM79, where mAM79 is fused with signal peptide sequence of pea rib-1,5-bisphospate carboxylase (rbcS) smal subunit and control ed by ubiquitin promoter. The plasmid was transformed into maize (Zea mays) immature embryos using Agrobacterium-mediated transformation method. Total 74 regenerated plants were obtained and PCR analysis showed that these transgenic plants had the integration of mAM79. Southern blot analysis was performed on the genomic DNA from four transgenic lines, and the result showed that one or two copies of mAM79 were integrated into maize genome. RT-PCR analysis result indicated that mAM79 was highly transcribed in transgenic maize plants. When sprayed with glyphosate, transgenic maize line AM85 and AM72 could tolerate 4-fold of commercial usage of glyphosate;however, al the non-transgenic maize plants were kil ed by glyphosate. The results in this study conifrmed that mAM79 could be used to develop glyphosate-tolerant maize, and the obtained transgenic maize lines could be used for the breeding of glyphosate-tolerant maize.

AMS/DOE Fellowship Recipients

Energy Technology Data Exchange (ETDEWEB)

Armstrong, Stephanie [American Meteorological Society, Boston, MA (United States)

2016-11-21

The AMS/DOE graduate fellowships were awarded to three students entering their first year of graduate study. The funds allowed each student to take a full course load during their first of year of graduate study which helps each of them to enter the professional, scientific community at an earlier date. Each recipient is academically outstanding, received glowing references of support and demonstrated their strong desire to perform scientific research. As part of the fellowship, each of the students was invited to attend the AMS Annual Meeting where they got to participate in the AMS student conference, attend scientific sessions and visit the exhibition hall. In addition, a student awards luncheon was held where each of the recipients got to meet their sponsor and receive a certificate.

Jovellanos y América: el temor a un mundo escindido

Directory of Open Access Journals (Sweden)

Rafael Herrera Guillén

2010-01-01

Full Text Available Las ideas de Jovellanos sobre Ultramar durante el proceso constituyente fueron determinantes para el futuro de las relaciones y final ruptura entre España y América. El gijonés insistió en dejar de considerar a América como una colonia, para reconocerla como una provincia más de la monarquía, así como en el derecho de representación en Cortes de los ciudadanos americanos. Mas el temor jovellanista a la escisión continental del imperio español terminó haciéndose real y, paradójicamente, sus ideas de reforma constitucional resultaron decisivas para precipitarla.

Preliminary Analysis of High-Flux RSG-GAS to Transmute Am-241 of PWR’s Spent Fuel in Asian Region

Science.gov (United States)

Budi Setiawan, M.; Kuntjoro, S.

2018-02-01

A preliminary study of minor actinides (MA) transmutation in the high flux profile RSG-GAS research reactor was performed, aiming at an optimal transmutation loading for present nuclear energy development. The MA selected in the analysis includes Am-241 discharged from pressurized water reactors (PWRs) in Asian region. Until recently, studies have been undertaken in various methods to reduce radiotoxicity from actinides in high-level waste. From the cell calculation using computer code SRAC2006, it is obtained that the target Am-241 which has a cross section of the thermal energy absorption in the region (group 8) is relatively large; it will be easily burned in the RSG-GAS reactor. Minor actinides of Am-241 which can be inserted in the fuel (B/T fuel) is 2.5 kg which is equivalent to Am-241 resulted from the partition of spent fuel from 2 units power reactors PWR with power 1000MW(th) operated for one year.

Bazı çam türlerinden kraft kağıt hamuru elde etme sürecinde sodyum borhidrür ilavesinin etkileri

Directory of Open Access Journals (Sweden)

Akın SARAÇBAŞI

2016-12-01

Full Text Available Bu araştırmada, kızılçam (Pinus brutia Ten. ve Monteri çamı (Pinus radiata D. Don. türlerinden toplam verim ve delignifikasyonu geliştirmek amacı ile alternatif bir Sodyum borhidrür (NaBH4-Kraft kâğıt hamuru elde etme yöntemi üzerinde çalışılmıştır. Delignifikasyon derecesi ve hamur verimi üzerinde reaksiyon koşullarının etkileri değerlendirilmiştir.Sonuçlar, sodyum borhidrür ilavesinin bilinen Kraft yöntemine göre her iki çam türünün hem verim hem de delignifikasyonunu geliştirmek için daha etkili olduğunu göstermektedir. Sodyum borhidrür (NaBH4-Kraft yönteminin, geleneksel Kraft yönteminin tek başına verdiği kappa numarası ve yüksek verim açısından, daha hızlı ve daha seçici olduğu düşünülmektedir. Ancak, kızılçam için en iyi Sodyum borhidrür (NaBH4-Kraft kâğıt hamuru üretim koşulu Aktif Alkali: %16, Sülfidite: %28, NaBH4 oranı: %0.5 iken, Monteri çamı için en iyi Sodyum borhidrür (NaBH4-Kraft kâğıt hamuru üretim koşulunun ise Aktif Alkali: %20, Sülfidite: %26, NaBH4 Oranı: %0.7 olduğu bulunmuştur.

Aménageurs et «reconversion cartographique»

Directory of Open Access Journals (Sweden)

Patrick POTTIER

1991-03-01

Full Text Available Aménageurs et urbanistes s’accordent à faire des Systèmes de Gestion de Bases de Données Géographiques l’outil de demain. Pourtant, de réelles difficultés freinent aujourd’hui leur développement. Ces difficultés ne pourront être surmontées qu’en envisageant une réflexion profonde sur l’information géographique et l’analyse spatiale.

Implications of AM for the Navy Supply Chain

Science.gov (United States)

2016-12-01

Certification. He is a published author and an entrepreneur and co-founder of Prosiren Inc., a watersports apparel company. A s the U.S. Navy continues...delineating a single base price for manufacture and shipping while allowing for small annual increases due to inflation. Constraints As laid out, there are...least in the short run; AM is only supplanting a previous method of manufacture for a part, not increasing the draw. The government generally is

Electrochemical investigations of La, Nd and Am in molten chloride salts in view of Am/Ln partitioning

International Nuclear Information System (INIS)

Pernel, C.; Serp, J.; Ougier, M.; Malmbeck, R.; Glatz, J.P.

2001-01-01

The electrochemical behaviour of La, Nd and Am has been investigated in molten LiCl-KCl eutectic. La shows a reversible single reduction/oxidation step controlled by mass transfer. The electrochemical reduction of Nd and Am proceeds via a two steps process, i.e. the reduction of trivalent species (Nd(III) and Am(III)) leading to Nd(II) and Am(II) species which are reduced at more negative potentials to form metallic deposits. Diffusion coefficients of La, Nd and Am have been calculated and are in reasonable agreement with literature data. Electro-depositions of La and Nd have been carried out onto solid Ni and liquid Cd cathodes. Much higher deposition efficiency is obtained for La compared to Nd on a solid cathode. This is an effect of the multi-valent nature of Nd in the chloride melts. (author)

Electrochemical investigations of La, Nd and Am in molten chloride salts in view of Am/Ln partitioning

Energy Technology Data Exchange (ETDEWEB)

Pernel, C.; Serp, J.; Ougier, M.; Malmbeck, R.; Glatz, J.P. [European Commission, JRC, ITU, Karlsruhe (Germany)

2001-07-01

The electrochemical behaviour of La, Nd and Am has been investigated in molten LiCl-KCl eutectic. La shows a reversible single reduction/oxidation step controlled by mass transfer. The electrochemical reduction of Nd and Am proceeds via a two steps process, i.e. the reduction of trivalent species (Nd(III) and Am(III)) leading to Nd(II) and Am(II) species which are reduced at more negative potentials to form metallic deposits. Diffusion coefficients of La, Nd and Am have been calculated and are in reasonable agreement with literature data. Electro-depositions of La and Nd have been carried out onto solid Ni and liquid Cd cathodes. Much higher deposition efficiency is obtained for La compared to Nd on a solid cathode. This is an effect of the multi-valent nature of Nd in the chloride melts. (author)

AM06: the Associative Memory chip for the Fast TracKer in the upgraded ATLAS detector

CERN Document Server

Liberali, Valentino; The ATLAS collaboration

2018-01-01

This paper describes the AM06 chip, a highly parallel processor for pattern recognition in high energy physics. AM06 contains memory banks that store up to 2^17 patterns made up of 8x18 bit words and integrates SER/DES IP blocks for 2.4 Gb/s IO to avoid routing congestion. AM06 combines custom memory arrays, standard logic cells and IP blocks within a 168 mm^2 silicon area with 421 million transistors and can perform bitwise comparisons at 1.6 Pbit/s, consuming ~2 fJ/bit per comparison thanks to the optimized design based on the XORAM cells.

AM06: the Associative Memory chip for the Fast TracKer in the upgraded ATLAS detector

CERN Document Server

Annovi, Alberto; The ATLAS collaboration; Calderini, Giovanni; Crescioli, Francesco

2016-01-01

\\abstract{This paper describes the AM06 chip, which is a highly parallel processor for pattern recognition in high energy physics experiments. It contains memory banks that store data organized in 18 bit words; a group of 8 words is called ``pattern''. Each AM06 chip can store up to 2$^{17}$ patterns. The AM06 integrates serializer/deserializer IP blocks at 2 Gbit/s for input/output communication, to avoid routing congestion at the board level. The AM06 is a complex chip. It has been designed in 65 nm CMOS, combining full-custom memory arrays, standard logic cells and IP blocks. It occupies a silicon area of 168 mm$^2$ and contains 421 millions transistors. The AM06 can perform bitwise comparison at a rate of 100 kHz. Thanks to the XORAM cell and to the design optimization, the AM06 consumes about 1 fJ/bit per comparison. The AM06 has been fabricated and successfully tested with a dedicated test system.

La gouvernance de l'eau dans les Amériques

OpenAIRE

Azpiazu, Daniel; Barkin, David; Brown, Christopher; Brun, Alexandre; Gentes, Ingo; Lasserre, Frédéric; Madrigal, Róger; Miranda, Víctor Hugo Perales; Palacio, Ariane de; Tignino, Mara; Ventura, Ma. de Lourdes Amaya

2010-01-01

À partir d’un état des lieux des travaux engagés dans la région, des auteurs dégagent un champ d’études pluridisciplinaires axé sur la problématique de la gouvernance de l’eau dans les Amériques. Leur objectif : jeter les bases d’une transformation de la gouvernance et de la gestion de la ressource selon une démarche comparative régionale et confronter les Amériques au processus de modernisation structurelle issue de l’accroissement de la population, de l’industrialisation, de l’ouverture des...

Hacia la gestión ambiental de residuos sólidos en las metrópolis de América Latina

Directory of Open Access Journals (Sweden)

Luz Ángela Rodríguez Escobar

2002-11-01

Full Text Available La contaminación generada por la acumulación de residuos sólidos está presente en todas las metrópolis de América Latina, afectando el ecosistema. Dicha contaminación es causada por la población y su aglomeración en zonas urbanas. Los datos estadísticos de las metrópolis latinoamericanas permiten establecer una relación directa entre población y acumulación de residuos sólidos y también entre nivel de ingresos y generación de residuos, mostrando que la relación población-residuos sólidos está mediada por variables económicas y culturales. La información de generación de basura por persona y su respectivo nivel socioeconómico permite establecer diferencias de cantidad y calidad de los residuos generados por individuos de distinto nivel socioeconómico, que a su vez se asocian a diferentes estilos de vida y patrones de consumo. Así, la producción de basura es potenciada por la dinámica de producción y consumo y por la dinámica demográfica, siendo un efecto no esperado de ambas, que convierte los residuos sólidos en un subproducto del modelo de desarrollo y la dinámica demográfica. En el escenario planteado, el problema ambiental de los residuos sólidos en .las metrópolis de América Latina aparece como irresoluto y la decisión de resolverlo de manera fundamental pasa por cambiar el modelo de desarrollo y el comportamiento de la sociedad. Una solución menos extrema consiste en hacer un manejo integral de los residuos sólidos a través de políticas de gestión integral.

Measurement of the 241Am and the 243Am Neutron Capture Cross Sections at the n_TOF Facility at CERN

CERN Document Server

Mendoza, E; Guerrero, C; Altstadt, S; Andrzejewski, J; Audouin, L; Barbagallo, M; Bécares, V; Bečvář, F; Belloni, F; Berthoumieux, E; Billowes, J; Boccone, V; Bosnar, D; Brugger, M; Calviani, M; Calviño, F; Carrapiço, C; Cerutti, F; Chiaveri, E; Chin, M; Colonna, N; Cortés, G; Cortés-Giraldo, M A; Diakaki, M; Domingo-Pardo, C; Duran, I; Dressler, R; Dzysiuk, N; Eleftheriadis, C; Ferrari, A; Fraval, K; Ganesan, S; García, A R; Giubrone, G; Gómez-Hornillos, M B; Gonçalves, I F; González-Romero, E; Griesmayer, E; Gunsing, F; Gurusamy, P; Jenkins, D G; Jericha, E; Kadi, Y; Käppeler, F; Karadimos, D; Kivel, N; Koehler, P; Kokkoris, M; Korschinek, G; Krtička, M; Kroll, J; Langer, C; Lederer, C; Leeb, H; Leong, L S; Losito, R; Manousos, A; Marganiec, J; Martínez, T; Mastinu, P F; Mastromarco, M; Massimi, C; Meaze, M; Mengoni, A; Milazzo, P M; Mingrone, F; Mirea, M; Mondelaers, W; Paradela, C; Pavlik, A; Perkowski, J; Pignatari, M; Plompen, A; Praena, J; Quesada, J M; Rauscher, T; Reifarth, R; Riego, A; Roman, F; Rubbia, C; Sarmento, R; Schillebeeckx, P; Schmidt, S; Schumann, D; Tagliente, G; Tain, J L; Tarrío, D; Tassan-Got, L; Tsinganis, A; Valenta, S; Vannini, G; Variale, V; Vaz, P; Ventura, A; Versaci, R; Vermeulen, M J; Vlachoudis, V; Vlastou, R; Wallner, A; Ware, T; Weigand, M; Weiß, C; Wright, T J; Žugec, P

2014-01-01

The capture cross sections of Am-241 and Am-243 were measured at the n\\_TOF facility at CERN in the epithermal energy range with a BaF2 Total Absorption Calorimeter. A preliminary analysis of the Am-241 and a complete analysis of the Am-243 measurement, including the data reduction and the resonance analysis, have been performed.

Present status of the JAEA-AMS-TONO. 2012

International Nuclear Information System (INIS)

Saito-Kokubu, Yoko; Matsubara, Akihiro; Ishimaru, Tsuneari; Hanaki, Tatsumi; Nishizawa, A.; Miyake, M.; Ohwaki, Y.; Nishio, T.; Tanaka, Takayuki

2013-01-01

The Tono Geoscience Center (TGC) of JAEA has been conducting research into deep underground environments for R and D program related to the geological disposal of High-Level Radioactive Waste. The AMS system of the TGC has routinely been used for 14 C-AMS since it started to be operated in 1998. In recent years, we have promoted the development of system technology for routine 10 Be-AMS. An inter-laboratory comparison of the 14 C-AMS was performed with the JAEA-AMS-MUTSU. The data of isotope ratios obtained with both AMS systems showed that there is no significant difference between them. In the development for the 10 Be-AMS, several test measurements have been performed by using standard samples. The results indicated fairly robust stability of data quality, which contributed to complete the development for routine 10 Be measurement. We are now in the stage of the development for routine 26 Al-AMS. (author)

Enhancing STEM coursework at MSIs through the AMS Climate Studies Diversity Project

Science.gov (United States)

Abshire, W. E.; Mills, E. W.; Slough, S. W.; Brey, J. A.; Geer, I. W.; Nugnes, K. A.

2017-12-01

The AMS Education Program celebrates a successful completion to its AMS Climate Studies Diversity Project. The project was funded for 6 years (2011-2017) through the National Science Foundation (NSF). It introduced and enhanced geoscience and/or sustainability-focused course components at minority-serving institutions (MSIs) across the U.S., many of which are signatories to the President's Climate Leadership Commitments, administered by Second Nature, and/or members of the Louis Stokes Alliances for Minority Participation. The Project introduced AMS Climate Studies curriculum to approximately 130 faculty representing 113 MSIs. Each year a cohort of, on average, 25 faculty attended a course implementation workshop where they were immersed in the course materials, received presentations from high-level speakers, and trained as change agents for their local institutions. This workshop was held in the Washington, DC area in collaboration with Second Nature, NOAA, NASA Goddard Space Flight Center, Howard University, and other local climate educational and research institutions. Following, faculty introduced and enhanced geoscience curricula on their local campuses with AMS Climate Studies course materials, thereby bringing change from within. Faculty were then invited to the following AMS Annual Meeting to report on their AMS Climate Studies course implementation progress, reconnect with their colleagues, and learn new science presented at the meeting. A longitudinal survey was administered to all Climate Diversity Project faculty participants who attended the course implementation workshops. The survey goals were to assess the effectiveness of the Project in helping faculty implement/enhance their institutional climate science offering, share best practices in offering AMS Climate Studies, and analyze the usefulness of course materials. Results will be presented during this presentation. The AMS Climate Studies Diversity Project builds on highly successful, NSF

La vulnerabilidad fiscal del gasto social: ¿Es Diferente América Latina?

OpenAIRE

Eduardo Lora

2007-01-01

Se utiliza un panel desbalanceado de medio centenar de países para el período 1985-2003 con el objeto de evaluar la vulnerabilidad del gasto público social (en educación y salud) frente a las variables fiscales corrientes y la deuda pública en América Latina en comparación con el resto del mundo en desarrollo. El gasto social es significativamente más bajo en América Latina (aunque absorbe una proporción mayor del gasto primario) y es más vulnerable frente a mayores pagos de intereses de la d...

The PACA Project : Pro-Am Collaborative Astronomy

Science.gov (United States)

Yanamandra-Fisher, P. A.

2014-04-01

The Pro-Am Collaborative Astronomy (PACA) project is the next stage of evolution of the paradigm developed for the observational campaign of C/2012 S1 or C/ISON. Four different phases of collaboration are identified, and illustrate the integration of scientific investigations with amateur astronomer community via observations, and models; and the rapid dissemination of the results via a multitude of social media for rapid global access. The success of the paradigm shift in scientific research is now implemented in other comet observing campaigns. Both communities (scientific and amateur astronomers) benefit from these collective, collaborative partnerships; while outreach is the instantaneous deliverable that provides both a framework for future data analyses and the dissemination of the results. While PACA identifies a collaborative approach to pro-am collaborations, given the volume of data generated for each campaign, new ways of rapid data analysis, mining access and storage are needed.

80 kV electrostatic wire septum for AmPS

International Nuclear Information System (INIS)

Linden, A. van der; Bijleveld, J.H.M.; Rookhuizen, H.B.; Bruinsma, P.J.T.; Heine, E.; Lassing, P.; Prins, E.

1992-01-01

The Amsterdam Pulse Stretcher (AmPS) ring aims at a 100% duty cycle operation by means of slow extraction of injected electron beam pulses of 2.1 μs. In the extraction process of the AmPS, the extracted beam is intercepted from the circulating beam by the 1 m long electrostatic wire septum. For a bending angle of 4.4 mrad the maximum anode voltage is 80 kV. Care has been given to the electric field distribution at the entrance and exit of the septum and to the insulators, required to support the anode. Prototype tests have been successful up to an anode voltage of 120 kV. (R.P.) 9 refs.; 5 figs

Nuclear Safeguards and Non-Proliferation Education at Texas A&M University

International Nuclear Information System (INIS)

Gariazzo, C.; Charlton, W.

2015-01-01

The MS degree in Nuclear Engineering - Non-proliferation at Texas A&M University is administered by the Nuclear Security Science and Policy Institute (NSSPI). The oldest and largest of its kind in the US, 45 M.S. and 15 Ph.D. students conducted technical research in relevant areas: safeguards, nuclear security, non-proliferation, and arms control. In addition to focusing on graduate education with a wide combination of internationally-recognized talent, NSSPI faculty lead research and service activities in safeguarding of nuclear materials and reducing nuclear threats. Texas A&M Nuclear Engineering students take relevant nonproliferation and safeguards courses (within the College of Engineering and the Texas A&M Bush School of Government) as well as conduct their research under competent experts. The complete educational experience here is unique because of the strong research and educational support NSSPI provides. This paper will detail these endeavors and convey contributions from NSSPI for developing next-generation safeguards experts via practical experiences and strong affiliations with real-world practitioners. The safeguards and non-proliferation education programme blends historical, legal, technical and policy aspects that is unique for a technical university such as Texas A&M. Beyond classroom lectures, NSSPI provides opportunities for students ranging from asynchronous learning modules to practical experiences. Publicly-available self-paced, online course modules in basic and advanced safeguards education have been developed by NSSPI as supplemental nuclear education for students and professionals. By leveraging NSSPI's contacts, students participate in exchange programmes with international institutions as well as partake in experiences like engaging safeguards practitioners at nuclear fuel cycle facilities around the world, conducting experiments at internationally-renowned laboratories, and representing their communities at workshops worldwide

Ya no estás más a mi lado, corazón: estética Camp en América Latina

OpenAIRE

Hueso Fibla, Silvia

2012-01-01

Esta tesis doctoral consta de tres capítulos cuyo recorrido pretende ilustrar que la puerta de entrada a la Estética Camp pasa por una mirada diferente sobre los productos culturales de masas y que su puerta de salida en América Latina atraviesa la Estética Neobarroca; por tanto, el Camp resulta tanto física como conceptualmente central en el trabajo. Se inserta el análisis de tres novelas y una obra teatral para mostrar cuáles son los mecanismos que el Camp adopta en América Latina: Tengo mi...

Measurement of the 243Am capture cross section at the n{sub T}OF facility; Medida de la sección eficaz de captura del 243Am en la instalación n{sub T}OF

Energy Technology Data Exchange (ETDEWEB)

Mendoza Cembranos, E.

2014-07-01

Nuclear data for minor actinides are necessary for improving the design and performance of advanced reactors and transmutation devices for the incineration of radioactive nuclear waste [Sal08, Gon09, Ali04, Ali06]. In particular, the 243Am isotope is relevant since it is the minor actinide which contributes more to the radiotoxicity of the nuclear waste between s3 03 and s3 04 years. In addition, the neutron capture in 243Am is the main gate to the creation of 244Cm and higher mass isotopes. The purpose of the this work is to provide experimental data on the 243Am(n, ) for improving the current evaluations. At present, there is no published neutron capture measurement of 243Am below 250 eV, and all the existing evaluations of the elastic and capture cross sections are based essentially on a single transmission measurement [Sim74]. Above 250 eV there are only a few capture measurements available [Wes85, Wis83], which show discrepancies that make them incompatible. Due to the lack of experimental data on 243Am the standard ENDF-6 format libraries present sizeable di rences between each other...(Author)

AmO₂ Analysis for Analytical Method Testing and Assessment: Analysis Support for AmO₂ Production

Energy Technology Data Exchange (ETDEWEB)

Kuhn, Kevin John [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Bland, Galey Jean [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Fulwyler, James Brent [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Garduno, Katherine [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Keller, Russell C. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Klundt, Dylan James [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Lujan, Elmer J. W [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Mark, Zoe Francoise Elise [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Mathew, Kattathu Joseph [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Ortega, Laura Claire [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Ottenfeld, Chelsea Faith [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Porterfield, Donivan R. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Rearick, Michael Sean [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Rim, Jung Ho [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Schake, Ann Rene [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Schappert, Michael Francis [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Stanley, Floyd E. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Thomas, Mariam R. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Wylie, Ernest Miller II [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Xu, Ning [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Tandon, Lav [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

2017-09-08

Americium oxide samples will be measured for various analytes to support AmO₂ production. The key analytes that are currently requested by the Am production customer at LANL include total Am content, Am isotopics, Pu assay, Pu isotopics, and trace element content including ²³⁷Np content. Multiple analytical methods will be utilized depending on the sensitivity, accuracy and precision needs of the Am matrix. Traceability to the National Institute of Standards and Technology (NIST) will be achieved, where applicable, by running NIST traceable quality control materials. This given that there are no suitable AmO₂ reference materials currently available for requested analytes. The primary objective is to demonstrate the suitability of actinide analytical chemistry methods to support AmO₂ production operations.

Convection Enhances Magnetic Turbulence in AM CVn Accretion Disks

Science.gov (United States)

Coleman, Matthew S. B.; Blaes, Omer; Hirose, Shigenobu; Hauschildt, Peter H.

2018-04-01

We present the results of local, vertically stratified, radiation magnetohydrodynamic shearing-box simulations of magnetorotational instability (MRI) turbulence for a (hydrogen poor) composition applicable to accretion disks in AM CVn type systems. Many of these accreting white dwarf systems are helium analogs of dwarf novae (DNe). We utilize frequency-integrated opacity and equation-of-state tables appropriate for this regime to accurately portray the relevant thermodynamics. We find bistability of thermal equilibria in the effective-temperature, surface-mass-density plane typically associated with disk instabilities. Along this equilibrium curve (i.e., the S-curve), we find that the stress to thermal pressure ratio α varied with peak values of ∼0.15 near the tip of the upper branch. Similar to DNe, we found enhancement of α near the tip of the upper branch caused by convection; this increase in α occurred despite our choice of zero net vertical magnetic flux. Two notable differences we find between DN and AM CVn accretion disk simulations are that AM CVn disks are capable of exhibiting persistent convection in outburst, and ideal MHD is valid throughout quiescence for AM CVns. In contrast, DNe simulations only show intermittent convection, and nonideal MHD effects are likely important in quiescence. By combining our previous work with these new results, we also find that convective enhancement of the MRI is anticorrelated with mean molecular weight.

Adsorption behavior of Am(III) on granite

International Nuclear Information System (INIS)

Zhang Yingjie; Feng Xiaogui; Liang Junfu; Chen Jing; Su Rui; Wang Ju; Liu Chunli

2009-01-01

The adsorption behavior of Am(III) on granite (sampled from drilling well BS01 at Beishan (BS) area--a potential candidate site for China's high-level radioactive waste repository, the granite sample's depth about 300 m) was studied in BS03 well groundwater by a batch technique at (25±1) degree C. The influences of pH, sulphate ion, total carbonate ion, humic acid, and concentration of the Am(III) on the adsorption behavior were also studied, and the possible adsorption mechanism was discussed. Experimental results show that the adsorption distribution rate of Am(III) on granite increases with increasing pH of aqueous phase. The chemical composition of the groundwater is the main factor which influences the species of Am(III) and adsorption behavior. The adsorption mechanism of Am(III) on granite is surface complexation. The adsorption isotherm of Am(III) on granite can be described by Freundlich's equation. (authors)

Biosorption of 241Am by Candida sp

International Nuclear Information System (INIS)

Luo Shunzhong; Zhang Taiming; Liu Ning; Yang Yuanyou; Jin Jiannan; Hua Xinfeng

2003-01-01

The biosorption of radionuclide 241 Am from solutions by Candida sp., and the influences of experimental conditions on the adsorption were studied. The results showed that the adsorption equilibrium was achieved within 4h and the optimum pH=2. No significant differences on 241 Am biosorption were observed at 10-45 degree C, or challenged with Au 3+ or Ag + , even 1500 times or 4500 times over 241 Am, respectively. The adsorption rate could reach 97.8% by dry Candida sp. of 0.82 g/L in 241 Am solutions (pH=2) of 5.6-111 MBq/L (44.04-873.0 μg/L) (C 0 ), with maximum adsorption capacity (W) of 63.5 MBq/g (501.8 μg/g), implying that the removal of 241 Am by Candida sp. from solutions was feasible. The relationship between activities (C 0 ) and adsorption capacities (W) of 241 Am indicated that the biosorption process could be described by Langmuir adsorption isotherm

Un think tank de l'Amérique latine contribue à rationaliser les ...

International Development Research Centre (IDRC) Digital Library (Canada)

23 mai 2012 ... Comme l'indique l'économiste Andrés Rius, un ancien agent de projet du CRDI qui enseigne maintenant à l'Universidad de la República, en Uruguay, le Réseau latino-américain sur le commerce (LATN) a été créé en réponse à une lacune flagrante. Les gouvernements d'Amérique latine avaient besoin ...

Améliorer les conditions de vie des jeunes et des femmes en ...

International Development Research Centre (IDRC) Digital Library (Canada)

Améliorer les conditions de vie des jeunes et des femmes en développant la petite entreprise : mesure de l'impact. Durant les années 2000, la croissance économique et l'augmentation des investissements sociaux ont réduit la pauvreté et offert aux populations de l'Amérique latine de multiples débouchés sur le marché du ...

Determination of 241Am in reindeer bone

International Nuclear Information System (INIS)

Tahtinen, P.; Hakanen, M.; Jaakkola, T.; Nikula, A.

1978-01-01

The purpose of this work was to develop a procedure to separate americium from other alpha active nuclides present in reindeer bone samples, especially 228 Th and its daughter nuclides. The 241 Am-spectrum of a reindeer bone sample analyzed using the proposed method is given. The α-spectrum was measured one week after electrodeposition. The absence of the alpha peak of 224 Ra, the daughter nuclide of 228 Th, indicates that no 228 Th was electrodeposited onto the platinum disc. Four reindeer bone samples were analyzed for 241 Am using the method developed. The 241 Am/ 239 240 Pu activity ratio in reindeer bone was 0.9 :- 0.4. These results indicate that compared to plutonium, americium is accumulated in reindeer bone more heavily than in liver. All 241 Am values presented are concentrations at the time of radioassay, and no correction has been made for the ingrowth of 241 Am formed by the decay of 241 Pu during stockpilling. However, all 241 Am determinations were made 1 to 3 yrs after sample collection, and thus the corrections due to the ingrowth can be considered slight. About 60% of plutonium body burden is located in liver and 20% in skeleton. The activity ratio 241 Am/ 239 240 Pu in these animals was about 0.2 and 1.0 in liver and skeleton, respectively. This indicates that about 60% of the 241 Am body burden is located in skeleton and about 30% in liver. It can be roughly estimated that the whole-body activity of 241 Am is thus about 40% of the 239 240 Pu body burden

AMS Days: "the results are phenomenal"

CERN Multimedia

2015-01-01

Following the conclusion of the successful AMS Days at CERN (see here), we sat down with leading minds in space science and particle physics to discuss their thoughts on the recent positron-excess results as well as the future of the AMS physics programme.   Samuel Ting, AMS spokesperson: Roberto Battiston, President of the Italian Space Agency (ASI): William H. Gerstenmaier, Human Exploration and Operations Directorate, NASA: Edward C. Stone (Caltech), Voyager 1 and 2 principal investigator:

The Apocalyptic Empire of America L’Empire apocalyptique américain

Directory of Open Access Journals (Sweden)

Akça Ataç

2009-10-01

Full Text Available En général, les études traitant de « l’Empire » américain tendent à chercher à comprendre celui-ci à partir de termes concrets tels que la frontière, l’intervention militaire, le commerce international. Néanmoins, les Empires sont d’abord le résultat de profondes traditions intellectuelles intangibles qui encouragent et justifient les actions entreprises dans le cadre de politiques impériales. Dans le cas de l’Amérique, les fondements intellectuels du nouvel idéal impérial sont ancrés dans la vision apocalyptique transportée dans les bagages des premiers colons puritains. Si l’on ne prend pas en compte cet ancrage apocalyptique, on ne peut saisir, dans leur totalité, les principes fondamentaux de « l’Empire » américain. On devrait examiner des termes qui entrent en résonance avec le discours impérial tels que « mission » et « destinée » ainsi que de l’engagement explicite dans la rhétorique présidentielle en faveur de « l’amélioration » du monde à n’importe quel prix du point de vue de cette croyance apocalyptique éternelle. Cet article essaie d’élucider l’origine et l’essence de la vision apocalyptique américaine en portant une attention particulière sur son influence dans la genèse du concept d’Empire américain.

From the History of Islamic Studies: A.-M. Schimmel and Phenomenological Approach to Religion

Directory of Open Access Journals (Sweden)

Samarina Tat’iana

2017-06-01

Full Text Available This article analyses key works of the well-known classic of Islamic studies A.-M. Schimmel and demonstrates that in her legacy the methodology of classical phenomenology of religion has found its fresh application to the study of Islam. The article focuses on essential points of A.-M. Schimmel’s biography that had infl uenced her academic career, and then analyses her phenomenological approach showing how she builds a system of description of Islam by means of systematising religious phenomena that proceeds from external forms (material objects to the centre of religion, God. Phenomenological analysis of Islam provides a base for comprehensive understanding and description of religious phenomena, starting from the perception of stone, holiday, clothes, myth in minds of ordinary Muslims. Schimmel’s phenomenological approach to Islam takes into account the specifi city of lived religion prior to the emergence of this trend. A.-M. Schimmel’s legacy therefore fits in the context of contemporary religious studies. The second part of the article examines the influence of leading scholars in phenomenology of religion (Mircea Eliade, Gerardus van der Leeuw, Friedrich Heiler on A.-M. Schimmel. It is concluded that the positive reception of her work among scholars of Islam and among Muslims themselves suggests that the language of the phenomenological description is the language of religious dialogue.

Am(VI) Extraction Final Report: FY16

Energy Technology Data Exchange (ETDEWEB)

Mincher, Bruce Jay [Idaho National Lab. (INL), Idaho Falls, ID (United States); Grimes, Travis Shane [Idaho National Lab. (INL), Idaho Falls, ID (United States); Tillotson, Richard Dean [Idaho National Lab. (INL), Idaho Falls, ID (United States); Law, Jack Douglas [Idaho National Lab. (INL), Idaho Falls, ID (United States)

2016-08-01

This report summarizes activities related to hexavalent Am extraction for FY16, in completion of FCR&D Milestone M3FT-16IN030103027. Activities concentrated on three areas of research: 1) centrifugal contactor hot testing, 2) Am(VI) stability studies, and 3) alternative oxidant studies. A brief summary of each task follows. Hot Testing: A new engineering-scale oxidation and solvent extraction test bed was built at Idaho National Laboratory to allow for solvent extraction testing of minor actinide separation concepts. The test bed consists of an oxidation vessel, filtration apparatus, four, 3D printed, 2-cm diameter centrifugal contactors, feed/product vessels, and sample ports. This system replaced the previous 3 stage, 5-cm contactor test bed that was used for the initial testing in FY14. In the FY16 hot test, a feed simulant was spiked with 243Am and 139Ce and treated with 60 g/L sodium bismuthate for two hours to oxidize the Am(III) to Am(VI). This solution was then pumped through a filter and into the four-stage centrifugal contactor setup. The organic phase solvent formulation was 1 M diethylhexylbutyramide (DEHBA)/dodecane. The test showed that Am(VI) was produced by bismuthate oxidation and the residual oxidant was successfully filtered without back pressure buildup. Sixty-four percent of Am was extracted in the contactors using DEHBA. Both Am and Ce were quantitatively stripped by 0.1 M H2O2. Successful demonstration of the utility of small, printable contactors suggests that hot testing of separations concepts can now be conducted more often, since it is cheaper, generates less waste, and entails much less radcon risk than previous testing. Am(VI) stability: A rigorous examination of reagents was conducted to determine if contaminants could interfere with Am oxidation and extraction. An series of DAm measurements showed that bismuthate particle size, water source, acid quality, and DAAP batch or pre-treatment had little effect on extraction efficiency

First evidence of the conversion of paracetamol to AM404 in human cerebrospinal fluid

Directory of Open Access Journals (Sweden)

Sharma CV

2017-11-01

Full Text Available Chhaya V Sharma,1 Jamie H Long,2 Seema Shah,1 Junia Rahman,1 David Perrett,3 Samir S Ayoub,4 Vivek Mehta1 1Pain & Anaesthesia Research Centre, St Bartholomew’s and The Royal London Hospitals, Barts Health NHS Trust, London, UK; 2Barts & The London School of Medicine, Queen Mary University of London, London, UK; 3BioAnalytical Science, Barts & The London School of Medicine, Queen Mary University of London, London, UK; 4School of Health, Sport and Bioscience, Medicines Research Group, University of East London, London, UK Abstract: Paracetamol is arguably the most commonly used analgesic and antipyretic drug worldwide, however its mechanism of action is still not fully established. It has been shown to exert effects through multiple pathways, some actions suggested to be mediated via N-arachidonoylphenolamine (AM404. AM404, formed through conjugation of paracetamol-derived p-aminophenol with arachidonic acid in the brain, is an activator of the capsaicin receptor, TRPV1, and inhibits the reuptake of the endocannabinoid, anandamide, into postsynaptic ­neurons, as well as inhibiting synthesis of PGE2 by COX-2. However, the presence of AM404 in the central nervous system following administration of paracetamol has not yet been demonstrated in humans. Cerebrospinal fluid (CSF and blood were collected from 26 adult male patients between 10 and 211 minutes following intravenous administration of 1 g of paracetamol. Paracetamol was measured by high-performance liquid chromatography with UV detection. AM404 was measured by liquid chromatography-tandem mass spectrometry. AM404 was detected in 17 of the 26 evaluable CSF samples at 5–40 nmol⋅L–1. Paracetamol was measurable in CSF within 10 minutes, with a maximum measured concentration of 60 μmol⋅L–1 at 206 minutes. This study is the first to report on the presence of AM404 in human CSF following paracetamol administration. This may represent an important finding in our understanding of

Am5-HT7: molecular and pharmacological characterization of the first serotonin receptor of the honeybee (Apis mellifera).

Science.gov (United States)

Schlenstedt, Jana; Balfanz, Sabine; Baumann, Arnd; Blenau, Wolfgang

2006-09-01

The biogenic amine serotonin (5-HT) plays a key role in the regulation and modulation of many physiological and behavioural processes in both vertebrates and invertebrates. These functions are mediated through the binding of serotonin to its receptors, of which 13 subtypes have been characterized in vertebrates. We have isolated a cDNA from the honeybee Apis mellifera (Am5-ht7) sharing high similarity to members of the 5-HT(7) receptor family. Expression of the Am5-HT(7) receptor in HEK293 cells results in an increase in basal cAMP levels, suggesting that Am5-HT(7) is expressed as a constitutively active receptor. Serotonin application to Am5-ht7-transfected cells elevates cyclic adenosine 3',5'-monophosphate (cAMP) levels in a dose-dependent manner (EC(50) = 1.1-1.8 nm). The Am5-HT(7) receptor is also activated by 5-carboxamidotryptamine, whereas methiothepin acts as an inverse agonist. Receptor expression has been investigated by RT-PCR, in situ hybridization, and western blotting experiments. Receptor mRNA is expressed in the perikarya of various brain neuropils, including intrinsic mushroom body neurons, and in peripheral organs. This study marks the first comprehensive characterization of a serotonin receptor in the honeybee and should facilitate further analysis of the role(s) of the receptor in mediating the various central and peripheral effects of 5-HT.

Status of recent utilization of JAEA AMS MUTSU

International Nuclear Information System (INIS)

Amano, Hikaru; Kabuto, Shoji; Kinoshita, Naoki

2008-01-01

Tandetron AMS was set up at the JAEA Mutsu in 1997. This AMS has been used for the determination of 14 C/ 12 C and 129 I/ 127 I. So far, 7075 samples have been measured for the 14 C-AMS, and 1317 samples have been measured for the 129 I-AMS until the end of September 2007. This AMS has adopted the open door policy which is periodic filing of applications and judgment for use twice a year, expecting broad usage including environmental issue and estimation of radioactive wastes for the general users from the spring of 2006. Eight external assignments have adopted in the first half of 2007, eleven external assignments have adopted in the latter half of 2007 at the JAEA AMS MUTSU. (author)

Menos pobres, más resistentes, pero falta mucho camino por andar. Los últimos 20 años de Am érica Latina

Directory of Open Access Journals (Sweden)

Miguel Ángel Rodríguez Echeverría

2008-01-01

Full Text Available La crisis de la deuda externa al final de la década de 1970 terminó con la política económica de industrialización por sustitución de importaciones que -con sus políticas de proteccionismo, planificación, intervención y regulación de precios- entonces prevalecía en América Latina. El acuerdo sobre políticas de crecimiento entre políticos y burócratas de las Américas, tecnócratas de las instituciones financieras internacionales y académicos en universidades del mundo en desarrollo y de los países desarrollados, al que se denominó Consenso de Washington, sustituyó al anterior paradigma. Durante los años del cambio de siglo el poco crecimiento y el aumento en la pobreza significó un desencanto con las políticas del Consenso de Washington e incluso con la democracia. Con los resultados actuales, es conveniente reconocer que las reformas aplicadas en las décadas de los ochenta y los noventa han permitido en América Latina un crecimiento mayor al de los países desarrollados, nos han hecho más fuertes frente a los shocks externos y facilitan política y económicamente mantener el crecimiento.

AM Broadcast Emergency Relay (AMBER)

Science.gov (United States)

1990-07-01

TIFTON GA US FC-n 3 5000 1000 31.456 -83.561 231 4989 1430 WMNC MORGANTOWN NC US F--n 3 5000 1000 35.752 -81.717 232 5080 1440 KODL THE DALLES OR US FC-n...Loring, ME Cutter, ME Alt. CINCSAC Plattsburgh, NY March AFB, CA Barksdale, LA Pease, Nil CINCLANT Griffiss, NY Norfolk, VA Sy Johnson, NC Robbins, GA ...retransmission. This process is repeated at AM stations located on the A k 0. AA 0o. .... - ° o" : 331 s os 0,u . psi risk area .. 001 0 00 ga Haqua

Brasil y "América Latina" Brazil and "Latin America"

Directory of Open Access Journals (Sweden)

Leslie Bethell

2012-06-01

Full Text Available Este ensayo, en parte historia de las ideas y en parte historia de las relaciones internacionales, examina la relación del Brasil con América Latina en perspectiva histórica. Durante más de un siglo, con posterioridad a la independencia, ni los intelectuales ni los gobiernos hispanoamericanos consideraron al Brasil como parte de "América latina". En cuanto a los intelectuales y los gobiernos brasileños, excepto por su relación con el Río de la Plata, sólo tenían ojos para Europa y, cada vez más después de 1889, los Estados Unidos. Cuando, en especial durante la Guerra Fría, los Estados Unidos, y por extensión el resto del mundo, comenzaron a tratar al Brasil como parte de América Latina, los gobiernos brasileños y los intelectuales brasileños, con la excepción de algunos de izquierda, seguían sin pensar al Brasil como parte integral de esta región. Desde el fin de la Guerra Fría, el Brasil ha comenzado a poner en práctica por primera vez una política de compromiso con sus vecinos en América del Sur.This essay, part history of ideas and part history of international relations, examines Brazil's relationship with Latin America in historical perspective. For more than a century after independence neither Spanish American intellectuals nor Spanish American governments considered Brazil part of 'America Latina'. For their part, Brazilian intellectuals and Brazilian governments, except for the Rio de la Plata, only had eyes for Europe and increasingly, after 1889, the United States. When, especially during the Cold War, the United States, and by extension the rest of the world, began to regard and treat Brazil as part of 'Latin America', Brazilian governments and Brazilian intellectuals, except some on the Left, still did not think of Brazil as an integral part of it. Since the end of the Cold War Brazil has for the first time pursued a policy of engagement with its neighbours -in South America.

Plant uptake and transport of 241Am

International Nuclear Information System (INIS)

Wallace, A.; Romney, E.M.; Mueller, R.T. Sr.; soufi, S.M.

1981-01-01

We conducted several experiments with 241 Am to obtain a more complete understanding of how this transuranium element is absorbed and transported in plants. In a plant species (Tamarix pentandra Pall.) that has salt glands in the leaves excreting NaCl and other ions, 241 Am was not pumped through these glands. Cyanide, which forms complexes with any metals, when applied to a calcareous soil, greatly increased the transport of 241 Am into stems and leaves of bush bean plants. Radioactive cyanide ( 14 C) was also transported to leaves and stems. When radish was grown in both calcareous and noncalcareous soils, 241 Am appeared to be fixed on the peel so firmly that it was resistant to removal by HNO 3 washing. The chelating agent DTPA induced increased transport of 241 Am to leaves and into the fleshy roots of the radish. Data for Golden Cross hybrid corn grown in solution culture showed at least seven times as much 241 Am transport to the xylem exudatields are corrected by recovery of added tracers

Using "I Am Moving, I Am Learning" to Increase Quality Instruction in Head Start Classrooms

Science.gov (United States)

Allar, Ishonté; Jones, Emily; Bulger, Sean

2018-01-01

Quality teacher-child interactions are characteristic of effective classrooms resulting in benefits for all children, but may be particularly important for children from low-income families. The purpose of this study was to explore the perception of Illinois Head Start teachers related to how "I am Moving, I am Learning" (IMIL) could…

Elements in biological AMS

International Nuclear Information System (INIS)

Vogel, J.S.; McAninch, J.; Freeman, S.

1996-08-01

AMS (Accelerator Mass Spectrometry) provides high detection sensitivity for isotopes whose half-lives are between 10 years and 100 million years. 14 C is the most developed of such isotopes and is used in tracing natural and anthropogenic organic compounds in the Earth's biosphere. Thirty-three elements in the main periodic table and 17 lanthanides or actinides have long lived isotopes, providing potential tracers for research in elemental biochemistry. Overlap of biologically interesting heavy elements and possible AMS tracers is discussed

21 CFR 822.24 - What are my responsibilities once I am notified that I am required to conduct postmarket...

Science.gov (United States)

2010-04-01

... 21 Food and Drugs 8 2010-04-01 2010-04-01 false What are my responsibilities once I am notified that I am required to conduct postmarket surveillance? 822.24 Section 822.24 Food and Drugs FOOD AND... SURVEILLANCE Responsibilities of Manufacturers § 822.24 What are my responsibilities once I am notified that I...

Cartas desde América. La emigración de asturianos a través de la correspondencia. 1864-1925

Directory of Open Access Journals (Sweden)

López Álvarez, Juaco

2000-06-01

Full Text Available The article illustrates the value that letters have for historical and anthropological research, especially on traditional societies. Letters sent home by Asturian immigrants in the Americas in the late 19th and early 20th centuries, today kept in the Museum of the Asturian People (Gijón, enable us to know firsthand the behavior, sentiments and perception of the reality that these people encountered overseas. They wrote about their long trip across the Atlantic, their arrival in a foreign land, the jobs they found and the relationships they established among themselves. Yet these letters are not only about their authors; they are also about contemporary Asturian society.El artículo muestra el valor de las cartas para el estudio de la antropología y la historia, y para la investigación de las sociedades tradicionales. La información proporcionada por varias correspondencias de emigrantes asturianos a América, pertenecientes al archivo del Museo del Pueblo de Asturias (Gijón, nos permite conocer sin intermediarios los comportamientos, los sentimientos y la percepción de la realidad de los emigrantes a fines del siglo XIX y comienzos del XX. A través de sus cartas analizamos el viaje y la llegada a América, el trabajo y las relaciones con otros emigrantes y con la familia de Asturias. Las respuestas remitidas por los emigrantes no sólo sirven para conocerlos a ellos mejor, sino también para profundizar en el conocimiento de la sociedad asturiana.

The Antirrhinum AmDEL gene enhances flavonoids accumulation and salt and drought tolerance in transgenic Arabidopsis.

Science.gov (United States)

Wang, Feibing; Zhu, Hong; Kong, Weili; Peng, Rihe; Liu, Qingchang; Yao, Quanhong

2016-07-01

A basic helix-loop-helix (bHLH) transcription factor gene from Antirrhinum, AmDEL , increases flavonoids accumulation and enhances salt and drought tolerance via up-regulating flavonoid biosynthesis, proline biosynthesis and ROS scavenging genes in transgenic Arabidopsis. In plants, transcriptional regulation is the most important tools for increasing flavonoid biosynthesis. The AmDEL gene, as a basic helix-loop-helix transcription factor gene from Antirrhinum, has been shown to increase flavonoids accumulation in tomato. However, its role in tolerance to abiotic stresses has not yet been investigated. In this study, the codon-optimized AmDEL gene was chemically synthesized. Subcellular localization analysis in onion epidermal cells indicated that AmDEL protein was localized to the nucleus. Expression analysis in yeast showed that the full length of AmDEL exhibited transcriptional activation. Overexpression of AmDEL significantly increased flavonoids accumulation and enhanced salt and drought tolerance in transgenic Arabidopsis plants. Real-time quantitative PCR analysis showed that overexpression of AmDEL resulted in the up-regulation of genes involved in flavonoid biosynthesis, proline biosynthesis and ROS scavenging under salt and drought stresses. Meanwhile, Western blot and enzymatic analyses showed that the activities of phenylalanine ammonia lyase, chalcone isomerase, dihydroflavonol reductase, pyrroline-5-carboxylate synthase, superoxide dismutase and peroxidase were also increased. Further components analyses indicated that the significant increase of proline and relative water content and the significant reduction of H2O2 and malonaldehyde content were observed under salt and drought stresses. In addition, the rates of electrolyte leakage and water loss were reduced in transgenic plants. These findings imply functions of AmDEL in accumulation of flavonoids and tolerance to salt and drought stresses. The AmDEL gene has the potential to be used to increase

Bioanalysis works in the IAA AMS facility: Comparison of AMS analytical method with LSC method in human mass balance study

International Nuclear Information System (INIS)

Miyaoka, Teiji; Isono, Yoshimi; Setani, Kaoru; Sakai, Kumiko; Yamada, Ichimaro; Sato, Yoshiaki; Gunji, Shinobu; Matsui, Takao

2007-01-01

Institute of Accelerator Analysis Ltd. (IAA) is the first Contract Research Organization in Japan providing Accelerator Mass Spectrometry (AMS) analysis services for carbon dating and bioanalysis works. The 3 MV AMS machines are maintained by validated analysis methods using multiple control compounds. It is confirmed that these AMS systems have reliabilities and sensitivities enough for each objective. The graphitization of samples for bioanalysis is prepared by our own purification lines including the measurement of total carbon content in the sample automatically. In this paper, we present the use of AMS analysis in human mass balance and metabolism profiling studies with IAA 3 MV AMS, comparing results obtained from the same samples with liquid scintillation counting (LSC). Human samples such as plasma, urine and feces were obtained from four healthy volunteers orally administered a 14 C-labeled drug Y-700, a novel xanthine oxidase inhibitor, of which radioactivity was about 3 MBq (85 μCi). For AMS measurement, these samples were diluted 100-10,000-fold with pure-water or blank samples. The results indicated that AMS method had a good correlation with LSC method (e.g. plasma: r = 0.998, urine: r = 0.997, feces: r = 0.997), and that the drug recovery in the excreta exceeded 92%. The metabolite profiles of plasma, urine and feces obtained with HPLC-AMS corresponded to radio-HPLC results measured at much higher radioactivity level. These results revealed that AMS analysis at IAA is useful to measure 14 C-concentration in bioanalysis studies at very low radioactivity level

XIX – XXI amžiaus ideologijos kritika: K. Marxas, F. Engelsas, S. Žižekas

OpenAIRE

Senūta, Povilas

2012-01-01

XIX ir ypač XX amžius pasižymėjo stipriomis ideologijomis, kurios ne tik keitė pasaulio ir žmonių gyvenimus, bet ir turėjo įtakos visoms vėlesnėms kartoms. Šio darbo tyrimo objektas – XIX – XXI amžiaus ideologijos kritika. Bandant suprasti pačias svarbiausias ideologijas, neišvengiamai tenka gilintis į marksizmo, kaip vieną iki šių dienų svarbiausią ideologiją ir pabandyti suprasti, kur slypi marksizmo fenomenas. Žinoma, čia neišvengiamai tenka kalbėti ir apie kitas ideologijas, tokias, ku...

América Latina en tiempos de globalización y crisis

DEFF Research Database (Denmark)

Christensen, Steen Fryba; Cancino, Hugo

2010-01-01

continuidad y también de ruptura de los fenómenos sociales, políticos, ideológicos y económicos de América Latina. Nuestro punto de partida es la irreversibilidad de los procesos de globalización después de más de una década de debates entre globalistas y antiglobalistas. En este contexto, insertamos el...... análisis de los actores sociales, étnicos políticos, en sus discursos y acciones en esta última década en cuyo momento final irrumpe la crisis financiera internacional que en deferentes modos e intensidades influye los países de América Latina. Palabras claves: globalización, modernidad, modernizaciones...

Plutonium AMS measurements in Yangtze River estuary sediment

International Nuclear Information System (INIS)

Tims, S.G.; Pan, S.M.; Zhang, R.; Fifield, L.K.; Wang, Y.P.; Gao, J.H.

2010-01-01

The Yangtze River is the largest single source of sediment to the continental shelf of the East China Sea. The quantity of material exported by the river is expected to decrease substantially as a consequence of an extensive continuing program of dam construction within the river catchment. We report here AMS measurements of plutonium isotope concentrations and ratios for selected depth increments from a sediment core, collected from the sub-aqueous delta of the Yangtze River estuary. The Pu derives from atmospheric nuclear weapons testing in the 1950s and 1960s, and is potentially a useful tracer of sediment deposition times in the marine environment. The results show considerable structure in the depth-concentration profile, and offer an excellent opportunity to compare Pu with the more commonly used 137 Cs isotopic tracer. The AMS data show superior sensitivity and indicate that the 240 Pu/ 239 Pu ratio can provide a check on the deposition dates. The changes in the 240 Pu and 239 Pu concentrations and the 240 Pu/ 239 Pu ratios with sediment depth all indicate the possibility of using Pu as a geochronological tool for coastal sediment studies.

Study of the properties of the Am-O system in view of the transmutation of Am 241 in fast reactors

International Nuclear Information System (INIS)

Casalta, S.

1996-04-01

To reduce the long term toxicity of Am 241 it was considered to transmute this isotope in fast reactor. The first part of this thesis is an introduction at this problem. In the second part we give the experimental techniques used for the realisation of an AmO 2 -MgO target (powder metallurgy under inert, oxidizing or reducing atmosphere). The properties of the Am-O system has been analyzed by X diffraction, thermodynamic and ceramography, in the Am 2 O 3 -AmO 2 field. In the third part we study the external exposure risk created by the manufacturing of this target and in the last part the behavior of this target in a fast reactor. 66 refs., 28 figs., 25 tabs., 1 append

AMS-02 fits dark matter

Science.gov (United States)

Balázs, Csaba; Li, Tong

2016-05-01

In this work we perform a comprehensive statistical analysis of the AMS-02 electron, positron fluxes and the antiproton-to-proton ratio in the context of a simplified dark matter model. We include known, standard astrophysical sources and a dark matter component in the cosmic ray injection spectra. To predict the AMS-02 observables we use propagation parameters extracted from observed fluxes of heavier nuclei and the low energy part of the AMS-02 data. We assume that the dark matter particle is a Majorana fermion coupling to third generation fermions via a spin-0 mediator, and annihilating to multiple channels at once. The simultaneous presence of various annihilation channels provides the dark matter model with additional flexibility, and this enables us to simultaneously fit all cosmic ray spectra using a simple particle physics model and coherent astrophysical assumptions. Our results indicate that AMS-02 observations are not only consistent with the dark matter hypothesis within the uncertainties, but adding a dark matter contribution improves the fit to the data. Assuming, however, that dark matter is solely responsible for this improvement of the fit, it is difficult to evade the latest CMB limits in this model.

AMS-02 fits dark matter

Energy Technology Data Exchange (ETDEWEB)

Balázs, Csaba; Li, Tong [ARC Centre of Excellence for Particle Physics at the Tera-scale,School of Physics and Astronomy, Monash University, Melbourne, Victoria 3800 (Australia)

2016-05-05

In this work we perform a comprehensive statistical analysis of the AMS-02 electron, positron fluxes and the antiproton-to-proton ratio in the context of a simplified dark matter model. We include known, standard astrophysical sources and a dark matter component in the cosmic ray injection spectra. To predict the AMS-02 observables we use propagation parameters extracted from observed fluxes of heavier nuclei and the low energy part of the AMS-02 data. We assume that the dark matter particle is a Majorana fermion coupling to third generation fermions via a spin-0 mediator, and annihilating to multiple channels at once. The simultaneous presence of various annihilation channels provides the dark matter model with additional flexibility, and this enables us to simultaneously fit all cosmic ray spectra using a simple particle physics model and coherent astrophysical assumptions. Our results indicate that AMS-02 observations are not only consistent with the dark matter hypothesis within the uncertainties, but adding a dark matter contribution improves the fit to the data. Assuming, however, that dark matter is solely responsible for this improvement of the fit, it is difficult to evade the latest CMB limits in this model.

América Latina

Directory of Open Access Journals (Sweden)

Marcos Olalla

2007-01-01

Full Text Available Este trabajo analiza el sentido intelectualista de la producción literaria modernista de Latinoamérica. Dicho enfoque es revisado en la obra del escritor argentino Manuel Ugarte (1875-1951 El porvenir de América Latina (1910. Nuestra lectura ofrece algunas líneas para la discriminación de las diversas fuentes ideológicas del intelectualismo en el “americanismo literario”. Consideramos en tal sentido la perspectiva historicista con la que Ugarte describe la composición social de América Latina.

América del Sur en la Apertura, Evidencias de un Modelo Global

Directory of Open Access Journals (Sweden)

Pablo Guillermo Butteri

2006-01-01

Full Text Available Los procesos de apertura en los que se involucró Sur América desde la década de los ochenta han sido determinantes en la evolución de numerosas variables ma c roe conómi c a s de los pa í s e s, particularmente en los campos del empleo, grado de apertura, competitividad, crecimiento, entre otras. La evolución de dichas variables ha sido disímil en todos los países que componen América del Sur, y dispar si se compara con los cambios registrados en los países de altos ingresos como lo son los miembros de la Organización para la Cooperación y Desarrollo Económico (OECD. En este artículo, además de hacer un análisis de la evolución de las principales variables macroeconómicas para Sur América y compararlas con otros países, busca estudiar la relación entre la tasa de cambio real (ITCR, el crecimiento, y el desempleo, enfatizando en el último aspecto, el cual ha sido poco analizado en la literatura económica de América del Sur. Para alcanzar esto, se estimó un modelo de datos panel que mide el grado de dependencia existente entre el desempleo, el ITCR y la actividad económica entre otras, para el periodo comprendido entre 1988 y 2002. Los principales resultados muestran que una mayor reevaluación (con dos años de anticipación y un menor crecimiento derivan en mayores tasas de desempleo, y aparentemente cambios en la tasa de inflación no afectan la última variable.

40 CFR 63.1561 - Am I subject to this subpart?

Science.gov (United States)

2010-07-01

... Standards for Hazardous Air Pollutants for Petroleum Refineries: Catalytic Cracking Units, Catalytic Reforming Units, and Sulfur Recovery Units What This Subpart Covers § 63.1561 Am I subject to this subpart... reforming an intermediate petroleum stream, or recovering a by-product(s) from the intermediate petroleum...

AM06: the Associative Memory chip for the Fast TracKer in the upgraded ATLAS detector

International Nuclear Information System (INIS)

Annovi, A.; Beretta, M. M.; Calderini, G.; Crescioli, F.; Frontini, L.; Liberali, V.; Shojaii, S.R.; Stabile, A.

2017-01-01

This paper describes the AM06 chip, which is a highly parallel processor for pattern recognition in the ATLAS high energy physics experiment. The AM06 contains memory banks that store data organized in 18 bit words; a group of 8 words is called 'pattern'. Each AM06 chip can store up to 131 072 patterns. The AM06 is a large chip, designed in 65 nm CMOS, and it combines full-custom memory arrays, standard logic cells and serializer/deserializer IP blocks at 2 Gbit/s for input/output communication. The overall silicon area is 168 mm 2 and the chip contains about 421 million transistors. The AM06 receives the detector data for each event accepted by Level-1 trigger, up to 100 kHz, and it performs a track reconstruction based on hit information from channels of the ATLAS silicon detectors. Thanks to the design of a new associative memory cell and to the layout optimization, the AM06 consumption is only about 1 fJ/bit per comparison. The AM06 has been fabricated and successfully tested with a dedicated test system.

Comparison Of ²⁵²Cf Time Correlated Induced Fisssion With AmLi Induced Fission On Fresh MTR Research Reactor Fuel

Energy Technology Data Exchange (ETDEWEB)

Joshi, Jay Prakash [Los Alamos National Laboratory

2017-03-30

The effective application of international safeguards to research reactors requires verification of spent fuel as well as fresh fuel. To accomplish this goal various nondestructive and destructive assay techniques have been developed in the US and around the world. The Advanced Experimental Fuel Counter (AEFC) is a nondestructive assay (NDA) system developed at Los Alamos National Laboratory (LANL) combining both neutron and gamma measurement capabilities. Since spent fuel assemblies are stored in water, the system was designed to be watertight to facilitate underwater measurements by inspectors. The AEFC is comprised of six ³He detectors as well as a shielded and collimated ion chamber. The ³He detectors are used for active and passive neutron coincidence counting while the ion chamber is used for gross gamma counting. Active coincidence measurement data is used to measure residual fissile mass, whereas the passive coincidence measurement data along with passive gamma measurement can provide information about burnup, cooling time, and initial enrichment. In the past, most of the active interrogation systems along with the AEFC used an AmLi neutron interrogation source. Owing to the difficulty in obtaining an AmLi source, a ²⁵²Cf spontaneous fission (SF) source was used during a 2014 field trail in Uzbekistan as an alternative. In this study, experiments were performed to calibrate the AEFC instrument and compare use of the ²⁵²Cf spontaneous fission source and the AmLi (α,n) neutron emission source. The ²⁵²Cf source spontaneously emits bursts of time-correlated prompt fission neutrons that thermalize in the water and induce fission in the fuel assembly. The induced fission (IF) neutrons are also time correlated resulting in more correlated neutron detections inside the ³He detector, which helps reduce the statistical errors in doubles when using the ²⁵²Cf interrogation source instead of

AMS, a particle spectrometer in space

International Nuclear Information System (INIS)

Buenerd, M.; Ohlsson-Malek, F.; Ren, Z.L.; Santos, D.; Thuillier, T.

1997-01-01

The Alpha Magnetic Spectrometer (AMS) is a detector designed for extraterrestrial study of anti-matter, matter and dark matter. A precursor flight and on the STS-91 flight of the shuttle is planned to take place on May 1998. AMS will be installed on the International Space Station in January 2002 where it will be operated next, for three to five years. The contributions of the ISN to the project on the shuttle (aerogel threshold Cherenkov counter) as well as the steps to build a RICH detector for AMS on the ISSA are explained here below. (authors)

Bazı Pestisitlerin Tetranychus urticae Koch'nin Ergin Yaşam Süresi ve Yumurta Verimine Etkileri

Directory of Open Access Journals (Sweden)

Mustafa Hakan BALCI

2018-03-01

Full Text Available Bu çalışmada deltamethrin, cypermethrin, imidacloprid ve thiacloprid etkili maddeye sahip insektisitlerin tarla uygulama dozu (T ve tarla uygulama dozunun yarısı (T/2'nın uygulandığı Tetranychus urticae (Acari: Tetranychidae erginlerinde üreme parametreleri ve yaşam süreleri incelenmiştir. İnsektisit dozları ve kontrol grubunda kullanılan saf su ilaçlama kulesi ile Petri kabındaki yaprak diskler üzerinde bulunan T. urticae'nin ergin bireylerine uygulanmıştır. Deltamethrin'in T/2 dozu uygulaması sonucunda, ergin bireylerinde ortalama yaşam süresi (5.35 gün ve ortalama ovipozisyon süresi (4.29 g kontrol grubuna (6.57 ve 5.44 g göre kısalmış, ayrıca yumurta sayısı/dişi oranıda azalmıştır. İmidacloprid, thiacloprid ve cypermethrin uygulanan her iki dozunda da T. urticae erginlerinde ortalama yaşam süresi ve ortalama preovipozisyon süresi kontrol grubu ile istatistiki olarak benzer bulunmuş ve dozlar arasında fark belirlenememiştir. İmidacloprid'in T/2 dozu uygulanan ergin bireylerin yumurta sayısı/dişi (64.03 oranının kontrol grubuna (39.96 göre arttığı belirlenmiştir. Sonuç olarak, imidacloprid ve deltamethrin’in T/2 dozlarının T. urticae ergin bireylerinde ortalama yaşam süresi, ortalama ovipozisyon süresi gibi bazı biyolojik özelikler üzerinde etkili olabileceği kanısına varılmıştır. 

Accumulation and release of {sup 241}Am by a macrophyte of the Yenisei River (Elodea canadensis)

Energy Technology Data Exchange (ETDEWEB)

Bolsunovsky, A. [Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk 660036 (Russian Federation)]. E-mail: radecol@ibp.ru; Zotina, T. [Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk 660036 (Russian Federation); Bondareva, L. [Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk 660036 (Russian Federation)

2005-07-01

The source of radioactive contamination of the Yenisei River floodplain, including contamination with transuranic elements, is the Mining-and-Chemical Combine of the Russian Ministry of Atomic Energy, which has for many years been producing weapons-grade plutonium. Transuranic elements have been detected not only in the soil and sediment of the river but also in the biomass of aquatic plants. This work is an investigation of accumulation and release of {sup 241}Am by a submerged macrophyte of the Yenisei River (Elodea canadensis) in laboratory experiments. In 2000-2003, laboratory experiments were carried out with biomass of E. canadensis Mich. and filtered river water. The samples were collected from the Yenisei River upstream of the discharge of the Combine's radioactive effluent. The experiments showed that {sup 241}Am is accumulated by Elodea biomass: the activity concentration of {sup 241}Am can reach 3280 {+-} 240 Bq/g, with the concentration factor for {sup 241}Am 16 600 {+-} 2200 l/kg. Results of chemical fractionation have proved that in the course of {sup 241}Am accumulation by Elodea biomass, {sup 241}Am tightly bound to biomass increases from 11% to 27% of the total {sup 241}Am in the biomass. Release of {sup 241}Am from the decaying Elodea biomass has been evaluated experimentally. By the end of the experiment (lasting up to 127 days), the Elodea plants had lost up to 65% of their initial {sup 241}Am activity and the rate of {sup 241}Am release into the water environment reached 23 Bq/day.

La violencia homicida en América Latina

Directory of Open Access Journals (Sweden)

Roberto BRICEÑO-LEÓN

2009-01-01

Full Text Available RESUMEN: El artículo analiza la situación de la violencia homicida en América Latina, cuál es su ubicación en la situación mundial de violencia y cuáles serían las posibles explicaciones para el lugar que ocupa. Utilizando la base de datos de la Organización Mundial de la Salud se clasifican las regiones por su tasa de homicidios y se ubica a América Latina como la región más violenta. Los países de América Latina son clasificados en cuatro grupos de acuerdo a la relación de su tasa de homicidios con la tasa media mundial y se caracterizan socialmente las víctimas.Para interpretar esa situación se relacionan con los niveles de urbanización y pobreza y se presentan los factores que pueden originar, fomentar y facilitar el incremento o disminución de los homicidios y su potencial utilidad en las políticas públicas.ABSTRACT: This article explores the situation of homicide violence in Latin America, its position within the worlds violence situation and the possible explanations for that position. Using the data bases of the World Health Organization, regions are classified by their homicide rates, which puts Latin America as the most violent region. Latin American countries are set in four groups according to the relation of their homicide rates with the world’s rate, and a social classification of victims is built. For interpreting this situation, those factors are put in relation with the levels of urbanization and poverty, and the possible causes of the increase or decrease of homicides are presented, as well as their potential utility for public policy making.

Transformation et commercialisation améliorées des produits du ...

International Development Research Centre (IDRC) Digital Library (Canada)

Ce projet vise à aborder le problème en mettant à l'essai des séchoirs solaires et en en faisant la promotion. Ces séchoirs peuvent améliorer la durée de conservation des petits poissons et la qualité du produit. Plus précisément, les chercheurs testeront des méthodes de séchage sur trois espèces de petits poissons :

The SUERC AMS laboratory after 3 years

International Nuclear Information System (INIS)

Freeman, Stewart; Bishop, Paul; Bryant, Charlotte; Cook, Gordon; Dougans, Drew; Ertunc, Tanya; Fallick, Anthony; Ganeshram, Raja; Maden, Colin; Naysmith, Philip; Schnabel, Christoph; Scott, Marian; Summerfield, Michael; Xu Sheng

2007-01-01

The new SUERC AMS Laboratory was described at AMS-9. Since then there have been technological developments, added and improved analysis capability, the formation of additional complementary groups, the purchase of another instrument, and many samples measured. Be, C, Al, Cl, Ca and I-AMS are established with measured species changing weekly. Full-terminal potential running is now routine and 5 MV is proving sufficient for all species. Ion detection and evaluation has also been improved by the use of even thinner detector windows as necessary and a more powerful on-line data analysis system. Routine radiocarbon measurement is to 4 per mille reproducibility at middling current and graphite samples of as little as 100 μg C can be accommodated. Even smaller samples can be measured as CO 2 using He carrier in the gas capable ion source. Two new sample preparation laboratories at SUERC are the NERC Cosmogenic Isotope Analysis Facility and the SUERC/University of Glasgow Centre for Geosciences Cosmogenic Nuclide Laboratory. In particular these benefit from competitive Be-AMS and Cl-AMS performance

Influence of organic fertilization on the sorption mechanisms of {sup 241} Am in tropical soils; A influencia da adubacao organica nos mecanismos de sorcao do {sup 241} Am em solos tropicais

Energy Technology Data Exchange (ETDEWEB)

Pereira, Tatiane Rocha

2009-07-01

In this work the mechanisms involved in the sorption of {sup 241}Am were investigated depending on the physicochemical properties of some Brazilian soils and on alterations promoted by organic amendment. This experimental study was conducted in a controlled area, where pots containing different kinds of soils (histisol, ferralsol and nitisol), with different organic amendment doses (without amendment; 2 kg m{sup -2} and 4 kg m{sup -2}) were artificially contaminated by radioactive solution water, which contained {sup 241}Am. Migration studies, distribution (or partition) coefficient (KJ), bioavailability and organic matter were carried out in these soils, with ar without organic amendment. In order to evaluate the effective bioavailability of radionuclides, radish (Raphanus sativus L.) was cultivated in these pots, and later the concentration of {sup 241}Am in radish's roots was measured. The main results show that {sup 241}Am tends to be strongly attached to organic matter and that organic amendment in tropical soils minimizes the radionuclide studied desorption. Also, distribution (or partition) coefficient values for {sup 241}Am were generated and these values are smaller than those ones determined for soils from temperate zones. Physical and chemical fractioning of organic matter were carried out. (author)

La legitimación de la Ciencia social en las bases de datos científicas más importantes para América Latina

OpenAIRE

Morales Gaitán, Katia Andrea; Aguado López, Eduardo

2010-01-01

Se analizan desde la Sociología de la ciencia tres ejes de su campo. El primero, rescata la epistemología de la producción científica social. El segundo, trata la construcción de la legitimidad de los científicos a través de sus publicaciones. El tercero, refiere el estudio de los indicadores más importantes para América Latina generados por la Cienciometría. Se concluye que la incorporación de las Tecnologías de Información y Comunicación son canales a través de los cuales se legitiman los r...

El acaparamiento de tierras en América Latina y el Caribe visto desde una perspectiva internacional más amplia

OpenAIRE

Borras, Saturnino; Franco, Jennifer; Kay, Cristóbal; Spoor, Monique

2012-01-01

textabstractIntroducción y mensajes claves Este documento se basa en la investigación empírica que fue encomendada por la Organización de las Naciones Unidas para la Alimentación y la Agricultura (FAO) sobre las condiciones y tendencias del ―acaparamiento de tierras‖ en 17 países de América Latina y el Caribe (véase el Anexo para una lista completa de los estudios, así como el documento síntesis correspondiente; FAO, 2011). Los 17 estudios se concluyeron a mediados de 2011. El marco analítico...

Distribution and Excretion of Am-241 in Rats

International Nuclear Information System (INIS)

Alatas, Z; Nurhayati, S; Rahardjo, T

1996-01-01

Determination of the activity content of Am-241 administered oral y in several organs and tissues of white rats including the excretion had been carried out. The observation of Am-241 activity was carried out through surgery and for the excretion of the radionuclide by collecting urine and faces. The surgeries were conducted on the 0 (6 hours), 1, 2, 3, 4, 5, 15 and 30th day post administration of 2.965 kBq Am-241, whereas the urine and faces collections were done every other day for 30 days using metabolism cage. The result indicated that the distribution of Am-241 which found in all tested organs/tissues with various fraction is considered as the initial distribution of Am-241 in rats. The content of americium in gastrointestinal tract and lung is relatively high within the first week post contamination. And, americium activities in other organs/tissues are various with time. The excretion of Am-241 is higher via feces than that of urin, i.e up to 20% in 30 days

Chemical thermodynamic representation of (U, Pu, Am)O2-x

International Nuclear Information System (INIS)

Osaka, Masahiko; Namekawa, Takashi; Kurosaki, Ken; Yamanaka, Shinsuke

2005-01-01

The oxygen potential isotherms of (U, Pu, Am)O 2-x were represented by a chemical thermodynamic model proposed by Lindemer et al. It was assumed in the present model that (U, Pu, Am)O 2-x consisted of the chemical species [UO 2 ], [PuO 2 ], [Pu 4/3 O 2 ], [AmO 2 ] and [Am 5/4 O 2 ] in a pseudo-quaternary system by treating the reduction rates of Pu and Am as identical; furthermore an interaction between [Am 5/4 O 2 ] and [UO 2 ] was introduced. The agreement between analytical and experimental isotherms was good, but the analytical values slightly overestimated the experimental values especially in the case of lower Am content. Adding an interaction between [Am 5/4 O 2 ] and [PuO 2 ] to the model resulted in a better representation

Étude sur l'escalade de la violence faite aux femmes en Amérique ...

International Development Research Centre (IDRC) Digital Library (Canada)

Étude sur l'escalade de la violence faite aux femmes en Amérique centrale. 21 juin 2016. Ana Carcedo. En Amérique centrale, on assiste à une escalade de la violence faite aux femmes et du nombre de meurtres de femmes (ou femicides). Or, il y a des lacunes sur le plan du signalement. Primo, malgré les efforts déployés ...

Development of AMS procedure for measurement of 93Zr

Science.gov (United States)

Lu, Wenting; Collon, Philippe; Kashiv, Yoav; Bowers, Matthew; Robertson, Daniel; Schmitt, Christopher

2011-10-01

The procedure for measuring 93Zr (t1/2 = 1.5 Ma) by AMS is currently being developed at the Nuclear Science Lab at the University of Notre Dame and we report on first experiments performed in this direction. AMS detection of 93Zr can potentially be applied to address astrophysical and environmental issues: (1) the measurement of the 92Zr(n,γ)93Zr reaction cross-section at nucleosynthesis s-process relevant temperatures, (2) the search for potential live 93Zr from a supernova in deep sea sediments, (3) hydrological and radioactive waste tracing. The measurement of 93Zr requires adequate separation from its stable isobar 93Nb. We are currently working on optimizing this separation by using the GasFilled Magnet technique with additional multiple dE measurements in a focal plane ionization chamber.

Actinide AMS at DREAMS

Energy Technology Data Exchange (ETDEWEB)

Khojasteh, Nasrin B.; Merchel, Silke; Rugel, Georg; Scharf, Andreas; Ziegenruecker, Rene [HZDR, Dresden (Germany); Pavetich, Stefan [HZDR, Dresden (Germany); ANU, Canberra (Australia)

2016-07-01

Radionuclides such as {sup 236}U and {sup 239}Pu were introduced into the environment by atmospheric nuclear weapon tests, reactor accidents (Chernobyl, Fukushima), releases from nuclear reprocessing facilities (Sellafield, La Hague), radioactive waste disposal, and accidents with nuclear devices (Palomares, Thule) [1]. Accelerator Mass Spectrometry (AMS) is the most sensitive method to measure these actinides. The DREsden AMS (DREAMS) facility is located at a 6 MV accelerator, which is shared with ion beam analytics and implantation users, preventing major modifications of the accelerator and magnetic analyzers. DREAMS was originally designed for {sup 10}Be, {sup 26}Al, {sup 36}Cl, {sup 41}Ca, and {sup 129}I. To modify the system for actinide AMS, a Time-of-Flight (TOF) beamline at the high-energy side has been installed and performance tests are on-going. Ion beam and detector simulations are carried out to design a moveable ionization chamber. Especially, the detector window and anode dimensions have to be optimized. This ionization chamber will act as an energy detector of the system and its installation is planned as closely as possible to the stop detector of the TOF beamline for highest detection efficiency.

Les semences du monde : L'amélioration participative des plantes

International Development Research Centre (IDRC) Digital Library (Canada)

IDRC

enthousiastes de l'Instituto Nacional de Ciencias Agrícolas. (INCA) a décidé de relever un défi : participer à l'innovation agricole de Cuba. Ils ont entrepris un projet visant à amé- liorer la qualité et le rendement du maïs et du haricot grâce aux efforts conjugués de tous les intervenants pour accroître la diversité des variétés ...

Texas A&M University in the JET Collaboration - Final Report

Energy Technology Data Exchange (ETDEWEB)

Fries, Rainer [Texas A & M Univ., College Station, TX (United States); Ko, Che-Ming [Texas A & M Univ., College Station, TX (United States)

2016-05-02

This final report summarizes the work done by PIs at Texas A&M University within the JET Topical Collaboration. The main focus of the group at Texas A&M has been the development and implementation of a hadronization model suitable to calculate hadronization of jet showers in heavy ion collisions event by event. The group successfully developed a hybrid model of parton recombination and remnant string fragmentation including recombination with thermal partons. A code realizing this model was developed and shared with other JET members. In addition, the group at Texas A&M worked on both open and hidden heavy flavor probes. In particular, they developed a description of heavy flavor hadronization based on recombination, and consistent with in-medium scattering rates of heavy quarks, and suggested the D_s meson as a precise probe of the hadronization mechanism. Another noteworthy focus of their work was electromagnetic probes, in particular, dileptons and photons from interactions of jets with the medium. In the soft sector the group has made several contributions to modern topics, e.g. the splitting of elliptic flow between isospin partners and the role of the initial strong gluon fields.

Texas A&M University in the JET Collaboration - Final Report

International Nuclear Information System (INIS)

Fries, Rainer; Ko, Che-Ming

2016-01-01

This final report summarizes the work done by PIs at Texas A&M University within the JET Topical Collaboration. The main focus of the group at Texas A&M has been the development and implementation of a hadronization model suitable to calculate hadronization of jet showers in heavy ion collisions event by event. The group successfully developed a hybrid model of parton recombination and remnant string fragmentation including recombination with thermal partons. A code realizing this model was developed and shared with other JET members. In addition, the group at Texas A&M worked on both open and hidden heavy flavor probes. In particular, they developed a description of heavy flavor hadronization based on recombination, and consistent with in-medium scattering rates of heavy quarks, and suggested the D s meson as a precise probe of the hadronization mechanism. Another noteworthy focus of their work was electromagnetic probes, in particular, dileptons and photons from interactions of jets with the medium. In the soft sector the group has made several contributions to modern topics, e.g. the splitting of elliptic flow between isospin partners and the role of the initial strong gluon fields.

Lanthanide-Dependent Regulation of Methanol Oxidation Systems in Methylobacterium extorquens AM1 and Their Contribution to Methanol Growth.

Science.gov (United States)

Vu, Huong N; Subuyuj, Gabriel A; Vijayakumar, Srividhya; Good, Nathan M; Martinez-Gomez, N Cecilia; Skovran, Elizabeth

2016-04-01

, our data suggest that M. extorquens AM1 has a mechanism to regulate which MeDH is transcribed, depending on the presence or absence of lanthanides. While the mechanism controlling differential regulation is not yet understood, further research into how methylotrophs obtain and use lanthanides will facilitate their cultivation in the laboratory and their use as a biomining and biorecycling strategy for recovery of these commercially valuable rare-earth elements. Copyright © 2016, American Society for Microbiology. All Rights Reserved.

Sorption of 241Am by Aspergillus niger spore and hyphae

International Nuclear Information System (INIS)

Yuanyou Yang; Ning Liu; Jiali Liao; Jiannan Jin; Shunzhong Luo; Taiming Zhang; Pengji Zhao

2004-01-01

Biosorption of 241 Am by a fungus A. niger, including the spore and hyphae, was investigated. The preliminary results showed that the adsorption of 241 Am by the microorganism was efficient. More than 96% of the total 241 Am could be removed from 241 Am solutions of 5.6-111 MBq/l (C 0 ) by spore and hyphae of A. niger, with adsorbed 241 Am metal (Q) of 7.2-142.4 MBq/g biomass, and 5.2-106.5 MBq/g, respectively. The biosorption equilibrium was achieved within 1 hour and the optimum pH range was pH 1-3. No obvious effects on 241 Am adsorption by the fungus were observed at 10-45 deg C, or in solutions containing Au 3+ or Ag + , even 2000 times above the 241 Am concentration. The 241 Am biosorption by the fungus obeys the Freundlich adsorption equation. There was no significant difference between the adsorption behavior of A. niger spore and hyphae. (author)

A new beam profile monitor and time of flight system for CologneAMS

Energy Technology Data Exchange (ETDEWEB)

Pascovici, G. [CologneAMS, University of Cologne (Germany); Dewald, A., E-mail: dewald@ikp.uni-koeln.de [CologneAMS, University of Cologne (Germany); Institute of Nuclear Physics, University of Cologne (Germany); Heinze, S., E-mail: heinze@ikp.uni-koeln.de [CologneAMS, University of Cologne (Germany); Fink, L.; Mueller-Gatermann, C.; Schiffer, M.; Feuerstein, C. [CologneAMS, University of Cologne (Germany); Pfeiffer, M.; Jolie, J.; Thiel, S.; Zell, K.O.; Arnopolina, O. [Institute of Nuclear Physics, University of Cologne (Germany); Blanckenburg, F. von [GFZ, German Research Centre for Geosciences, Potsdam (Germany)

2013-01-15

A complex beam detector consisting of a high-resolution beam profile monitor (BPM) and a time of flight (TOF) spectrometer with tracking capabilities was designed especially for the special needs of the Cologne center for accelerator mass spectrometry (CologneAMS). The beam detector assembly is designed to match the beam specifications of the 6 MV Tandetron AMS setup and its data acquisition system. It will have a reconfigurable structure, either as a fast TOF subsystem with a ca. 10 cm{sup 2} equivalent active area, or as a more complex BPM-TOF detector with beam tracking capabilities and a larger active area (16 cm{sup 2}). The purpose of this detector is to suppress background during spectrometry of heavy ions (U, Cm, Pu, Am etc.) and to suppress isobaric interferences such as {sup 36}S in {sup 36}Cl spectra.

Software development for continuous-gas-flow AMS

International Nuclear Information System (INIS)

Reden, K.F. von; Roberts, M.L.; Jenkins, W.J.; Rosenheim, B.E.; McNichol, A.P.; Schneider, R.J.

2008-01-01

The National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) Facility at Woods Hole Oceanographic Institution is presently completing installation of a novel continuous-flow AMS system. A multi-year development of an AMS microwave gas ion source in collaboration with Atomic Energy Canada Limited (AECL), Chalk River, has preceded this final step of an implementation that is expected to add a new dimension to 14 C AMS. National Instruments, NIM, and CAMAC modules have been programmed with LabVIEW on a Windows XP platform to form the basis for data acquisition. In this paper we discuss possible applications and include simulations of expected data acquisition scenarios like real-time AMS analysis of chromatograms. Particular attention will have to be given to issues of synchronization between rapidly changing input amplitudes and signal processing cycles in hardware and software

Contribution of the Staphylococcus aureus Atl AM and GL murein hydrolase activities in cell division, autolysis, and biofilm formation.

Directory of Open Access Journals (Sweden)

Jeffrey L Bose

Full Text Available The most prominent murein hydrolase of Staphylococcus aureus, AtlA, is a bifunctional enzyme that undergoes proteolytic cleavage to yield two catalytically active proteins, an amidase (AM and a glucosaminidase (GL. Although the bifunctional nature of AtlA has long been recognized, most studies have focused on the combined functions of this protein in cell wall metabolism and biofilm development. In this study, we generated mutant derivatives of the clinical S. aureus isolate, UAMS-1, in which one or both of the AM and GL domains of AtlA have been deleted. Examination of these strains revealed that each mutant exhibited growth rates comparable to the parental strain, but showed clumping phenotypes and lysis profiles that were distinct from the parental strain and each other, suggesting distinct roles in cell wall metabolism. Given the known function of autolysis in the release of genomic DNA for use as a biofilm matrix molecule, we also tested the mutants in biofilm assays and found both AM and GL necessary for biofilm development. Furthermore, the use of enzymatically inactive point mutations revealed that both AM and GL must be catalytically active for S. aureus to form a biofilm. The results of this study provide insight into the relative contributions of AM and GL in S. aureus and demonstrate the contribution of Atl-mediated lysis in biofilm development.

Contribution of the Staphylococcus aureus Atl AM and GL murein hydrolase activities in cell division, autolysis, and biofilm formation.

Science.gov (United States)

Bose, Jeffrey L; Lehman, McKenzie K; Fey, Paul D; Bayles, Kenneth W

2012-01-01

The most prominent murein hydrolase of Staphylococcus aureus, AtlA, is a bifunctional enzyme that undergoes proteolytic cleavage to yield two catalytically active proteins, an amidase (AM) and a glucosaminidase (GL). Although the bifunctional nature of AtlA has long been recognized, most studies have focused on the combined functions of this protein in cell wall metabolism and biofilm development. In this study, we generated mutant derivatives of the clinical S. aureus isolate, UAMS-1, in which one or both of the AM and GL domains of AtlA have been deleted. Examination of these strains revealed that each mutant exhibited growth rates comparable to the parental strain, but showed clumping phenotypes and lysis profiles that were distinct from the parental strain and each other, suggesting distinct roles in cell wall metabolism. Given the known function of autolysis in the release of genomic DNA for use as a biofilm matrix molecule, we also tested the mutants in biofilm assays and found both AM and GL necessary for biofilm development. Furthermore, the use of enzymatically inactive point mutations revealed that both AM and GL must be catalytically active for S. aureus to form a biofilm. The results of this study provide insight into the relative contributions of AM and GL in S. aureus and demonstrate the contribution of Atl-mediated lysis in biofilm development.

Climate Controls AM Fungal Distributions from Global to Local Scales

Science.gov (United States)

Kivlin, S. N.; Hawkes, C.; Muscarella, R.; Treseder, K. K.; Kazenel, M.; Lynn, J.; Rudgers, J.

2016-12-01

Arbuscular mycorrhizal (AM) fungi have key functions in terrestrial biogeochemical processes; thus, determining the relative importance of climate, edaphic factors, and plant community composition on their geographic distributions can improve predictions of their sensitivity to global change. Local adaptation by AM fungi to plant hosts, soil nutrients, and climate suggests that all of these factors may control fungal geographic distributions, but their relative importance is unknown. We created species distribution models for 142 AM fungal taxa at the global scale with data from GenBank. We compared climate variables (BioClim and soil moisture), edaphic variables (phosphorus, carbon, pH, and clay content), and plant variables using model selection on models with (1) all variables, (2) climatic variables only (including soil moisture) and (3) resource-related variables only (all other soil parameters and NPP) using the MaxEnt algorithm evaluated with ENMEval. We also evaluated whether drivers of AM fungal distributions were phylogenetically conserved. To test whether global correlates of AM fungal distributions were reflected at local scales, we then surveyed AM fungi in nine plant hosts along three elevation gradients in the Upper Gunnison Basin, Colorado, USA. At the global scale, the distributions of 55% of AM fungal taxa were affected by both climate and soil resources, whereas 16% were only affected by climate and 29% were only affected by soil resources. Even for AM fungi that were affected by both climate and resources, the effects of climatic variables nearly always outweighed those of resources. Soil moisture and isothermality were the main climatic and NPP and soil carbon the main resource related factors influencing AM fungal distributions. Distributions of closely related AM fungal taxa were similarly affected by climate, but not by resources. Local scale surveys of AM fungi across elevations confirmed that climate was a key driver of AM fungal

Enhancing TRU burning and Am transmutation in Advanced Recycling Reactor

International Nuclear Information System (INIS)

Ikeda, Kazumi; Kochendarfer, Richard A.; Moriwaki, Hiroyuki; Kunishima, Shigeru

2011-01-01

Research highlights: → This ARR is an oxide fueled sodium cooled reactor based on innovative technologies to destruct TRU. → TRU burning core is designed to burn TRU at 28 kg/TW th h, adding moderator pins of B 4 C (Enriched B-11). → Am transmutation core can transmute Am at 34 kg/TW th h, adding uranium free AmN blanket to TRU burning core. → The TRU burning core improves TRU burning by 40-50% than the previous core. → The Am transmutation core can transmute Am effectively, keeping the void reactivity acceptable. - Abstract: This paper presents about conceptual designs of Advanced Recycling Reactor (ARR) focusing on enhancement in transuranics (TRU) burning and americium (Am) transmutation. The design has been conducted in the context of the Global Nuclear Energy Partnership (GNEP) seeking to close nuclear fuel cycle in ways that reduce proliferation risks, reduce the nuclear waste in the US and further improve global energy security. This study strives to enhance the TRU burning and the Am transmutation, assuming the development of related technologies in this study, while the ARR based on mature technologies was designed in the previous study. It has followed that the provided TRU burning core is designed to burn TRU at 28 kg/TW th h, by adding moderator pins of B 4 C (Enriched B-11) and the Am transmutation core will be able to transmute Am at 34 kg/TW th h, by locating Am blanket of AmN around the TRU burning core. It indicates that these concepts improve TRU burning by 40-50% than the previous core and can transmute Am effectively, keeping the void reactivity acceptable.

Results of Am isotopic ratio analysis in irradiated MOX fuels

Energy Technology Data Exchange (ETDEWEB)

Koyama, Shin-ichi; Osaka, Masahiko; Mitsugashira, Toshiaki; Konno, Koichi [Power Reactor and Nuclear Fuel Development Corp., Oarai, Ibaraki (Japan). Oarai Engineering Center; Kajitani, Mikio

1997-04-01

For analysis of a small quantity of americium, it is necessary to separate from curium which has similar chemical property. As a chemical separation method for americium and curium, the oxidation of americium with pentavalent bismuth and subsequent co-precipitation of trivalent curium with BIP O{sub 4} were applied to analyze americium in irradiated MOX fuels which contained about 30wt% plutonium and 0.9wt% {sup 241}Am before irradiation and were irradiated up to 26.2GWd/t in the experimental fast reactor Joyo. The purpose of this study is to measure isotopic ratio of americium and to evaluate the change of isotopic ratio with irradiation. Following results are obtained in this study. (1) The isotopic ratio of americium ({sup 241}Am, {sup 242m}Am and {sup 243}Am) can be analyzed in the MOX fuels by isolating americium. The isotopic ratio of {sup 242m}Am and {sup 243}Am increases up to 0.62at% and 0.82at% at maximum burnup, respectively, (2) The results of isotopic analysis indicates that the contents of {sup 241}Am decreases, whereas {sup 242m}Am, {sup 243}Am increase linearly with increasing burnup. (author)

Dual roles for CoAA and its counterbalancing isoform CoAM in human kidney cell tumorigenesis

Science.gov (United States)

Kang, Yun Kyoung; Schiff, Rachel; Ko, Lan; Wang, Tao; Tsai, Sophia Y.; Tsai, Ming-Jer; W. O’Malley, Bert

2008-01-01

Co-Activator Activator (CoAA) has been reported to be a coactivator that regulates steroid receptor-mediated transcription and alternative RNA splicing. Herein we show that CoAA is a dual-function coregulator that inhibits G1/S transition in human kidney cells and suppresses anchorage independent growth and xenograft tumor formation. Suppression occurs in part by downregulating c-myc and its downstream effectors ccnd1 and skp2, and causing accumulation of p27/Kip1 protein. In this cellular setting, CoAA directly represses the proto-oncogene, c-myc by recruiting HDAC3 protein and decreasing both the acetylation of histone H3 and the presence of RNA polymerase II on the c-myc promoter. Interestingly, a splicing isoform of CoAA, Coactivator Modulator (CoAM), antagonizes CoAA-induced G1/S transition and growth inhibition by negatively regulating the mRNA levels of the endogenous CoAA isoform. In addition, we found that expression of CoAA protein is significantly decreased in human renal cell carcinoma as compared to normal kidney. Our study presents evidence that CoAA is a potential tumor suppressor in renal carcinoma and that CoAM is a counterbalancing splice-isoform. This is so far the only example of a nuclear receptor coregulator involved in suppression of kidney cancer, and suggests potentially significant new roles for coregulators in renal cancer biology. PMID:18829545

Australis: AMS for ultra sensitive trace element and isotopic studies

Energy Technology Data Exchange (ETDEWEB)

Sie, S H; Suter, G F [Commonwealth Scientific and Industrial Research Organisation (CSIRO), North Ryde, NSW (Australia). Div. of Exploration Geoscience

1994-12-31

The accelerator mass spectrometer (AMS) at the CSIRO HIAF laboratory is being upgraded to enable in-situ measurements of ultratraces and isotopic-ratios in mineralogical applications. The upgraded system will include a microbeam Cs ion source which is designed to produce better than 50 micrometre diameter Cs beam to enable analyses of monomineralic grains. The Cs primary beam will be mass analysed in order to minimize contamination of the sample. The detection system will be upgraded to enable analyses of elements up to U, at 2 MV terminal voltage for charge states 4 and 5. The system will be known as AUSTRALIS: A.M.S. for Ultra Sensitive TRAce eLement and Isotopic Studies. An overview of the system and the anticipated applications in minerals exploration and mining research are presented. 4 refs., 1 fig.

Australis: AMS for ultra sensitive trace element and isotopic studies

International Nuclear Information System (INIS)

Sie, S.H.; Suter, G.F.

1993-01-01

The accelerator mass spectrometer (AMS) at the CSIRO HIAF laboratory is being upgraded to enable in-situ measurements of ultratraces and isotopic-ratios in mineralogical applications. The upgraded system will include a microbeam Cs ion source which is designed to produce better than 50 micrometre diameter Cs beam to enable analyses of monomineralic grains. The Cs primary beam will be mass analysed in order to minimize contamination of the sample. The detection system will be upgraded to enable analyses of elements up to U, at 2 MV terminal voltage for charge states 4 and 5. The system will be known as AUSTRALIS: A.M.S. for Ultra Sensitive TRAce eLement and Isotopic Studies. An overview of the system and the anticipated applications in minerals exploration and mining research are presented. 4 refs., 1 fig

Australis: AMS for ultra sensitive trace element and isotopic studies

Energy Technology Data Exchange (ETDEWEB)

Sie, S.H.; Suter, G.F. [Commonwealth Scientific and Industrial Research Organisation (CSIRO), North Ryde, NSW (Australia). Div. of Exploration Geoscience

1993-12-31

The accelerator mass spectrometer (AMS) at the CSIRO HIAF laboratory is being upgraded to enable in-situ measurements of ultratraces and isotopic-ratios in mineralogical applications. The upgraded system will include a microbeam Cs ion source which is designed to produce better than 50 micrometre diameter Cs beam to enable analyses of monomineralic grains. The Cs primary beam will be mass analysed in order to minimize contamination of the sample. The detection system will be upgraded to enable analyses of elements up to U, at 2 MV terminal voltage for charge states 4 and 5. The system will be known as AUSTRALIS: A.M.S. for Ultra Sensitive TRAce eLement and Isotopic Studies. An overview of the system and the anticipated applications in minerals exploration and mining research are presented. 4 refs., 1 fig.

Dedekind σ-complete vector lattice of b-AM-compact operators ...

African Journals Online (AJOL)

We give several equivalent conditions characterizing the case when Krb-AM(E,F) is Dedekind σ-complete. Moreover, we describe the case when the space of all regular b-AM-compact operators from E to F is complete under the b-AM-norm. Keywords: Banach lattices, b-AM-compact operator, discrete space ...

Annotation Method (AM): SE7_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available base search. Peaks with no hit to these databases are then selected to secondary se...arch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are ma...SE7_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary data

Annotation Method (AM): SE2_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available base search. Peaks with no hit to these databases are then selected to secondary se...arch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are ma...SE2_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary data

Annotation Method (AM): SE4_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available base search. Peaks with no hit to these databases are then selected to secondary se...arch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are ma...SE4_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary data

Annotation Method (AM): SE9_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available base search. Peaks with no hit to these databases are then selected to secondary se...arch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are ma...SE9_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary data

Annotation Method (AM): SE3_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available base search. Peaks with no hit to these databases are then selected to secondary se...arch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are ma...SE3_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary data

Annotation Method (AM): SE6_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available base search. Peaks with no hit to these databases are then selected to secondary se...arch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are ma...SE6_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary data

Annotation Method (AM): SE1_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available base search. Peaks with no hit to these databases are then selected to secondary se...arch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are ma...SE1_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary data

Annotation Method (AM): SE8_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available base search. Peaks with no hit to these databases are then selected to secondary se...arch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are ma...SE8_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary data

Annotation Method (AM): SE5_AM1 [Metabolonote[Archive

Lifescience Database Archive (English)

Full Text Available base search. Peaks with no hit to these databases are then selected to secondary se...arch using exactMassDB and Pep1000 databases. After the database search processes, each database hits are ma...SE5_AM1 PowerGet annotation A1 In annotation process, KEGG, KNApSAcK and LipidMAPS are used for primary data

Simplified dark matter models in the light of AMS-02 antiproton data

Energy Technology Data Exchange (ETDEWEB)

Li, Tong [ARC Centre of Excellence for Particle Physics at the Tera-scale,School of Physics and Astronomy, Monash University,Melbourne, Victoria 3800 (Australia)

2017-04-19

In this work we perform an analysis of the recent AMS-02 antiproton flux and the antiproton-to-proton ratio in the framework of simplified dark matter models. To predict the AMS-02 observables we adopt the propagation and injection parameters determined by the observed fluxes of nuclei. We assume that the dark matter particle is a Dirac fermionic dark matter, with leptophobic pseudoscalar or axialvector mediator that couples only to Standard Model quarks and dark matter particles. We find that the AMS-02 observations are consistent with the dark matter framework within the uncertainties. The antiproton data prefer a dark matter (mediator) mass in the 700 GeV–5 TeV region for the annihilation with pseudoscalar mediator and greater than 700 GeV (200 GeV–1 TeV) for the annihilation with axialvector mediator, respectively, at about 68% confidence level. The AMS-02 data require an effective dark matter annihilation cross section in the region of 1×10{sup −25}–1×10{sup −24} (1×10{sup −25}–4×10{sup −24}) cm{sup 3}/s for the simplified model with pseudoscalar (axialvector) mediator. The constraints from the LHC and Fermi-LAT are also discussed.

Simplified dark matter models in the light of AMS-02 antiproton data

International Nuclear Information System (INIS)

Li, Tong

2017-01-01

In this work we perform an analysis of the recent AMS-02 antiproton flux and the antiproton-to-proton ratio in the framework of simplified dark matter models. To predict the AMS-02 observables we adopt the propagation and injection parameters determined by the observed fluxes of nuclei. We assume that the dark matter particle is a Dirac fermionic dark matter, with leptophobic pseudoscalar or axialvector mediator that couples only to Standard Model quarks and dark matter particles. We find that the AMS-02 observations are consistent with the dark matter framework within the uncertainties. The antiproton data prefer a dark matter (mediator) mass in the 700 GeV–5 TeV region for the annihilation with pseudoscalar mediator and greater than 700 GeV (200 GeV–1 TeV) for the annihilation with axialvector mediator, respectively, at about 68% confidence level. The AMS-02 data require an effective dark matter annihilation cross section in the region of 1×10 −25 –1×10 −24 (1×10 −25 –4×10 −24 ) cm 3 /s for the simplified model with pseudoscalar (axialvector) mediator. The constraints from the LHC and Fermi-LAT are also discussed.

Operational status of the JAEA-Mutsu tandetron AMS

International Nuclear Information System (INIS)

Kabuto, Shoji; Kinoshita, Naoki; Amano, Hikaru; Watanabe, Yukiya; Baba, Masami

2008-01-01

A Tandetron AMS (Accelerator Mass Spectrometer) had been set up at the Japan Atomic Energy Agency (formerly the Japan Atomic Energy Research Institute), Mutsu in 1997. The AMS features 3MV Tandetron accelerator and two independent beamlines for 14 C and 129 I measurement. In this paper, we describe the current status and troubles for the Tandetron AMS with the showing of examples from the last year. (author)

The use of AMS to the biomedical sciences

International Nuclear Information System (INIS)

Vogel, J.S.

1991-04-01

The Center for Accelerator Mass Spectroscopy (AMS) began making AMS measurements in 1989. Biomedical experiments were originally limited by sample preparation techniques, but we expect the number of biomedical samples to increase five-fold. While many of the detailed techniques for making biomedical measurements resemble those used in other fields, biological tracer experiments differ substantially from the observational approaches of earth science investigators. The role of xenobiotius in initiating mutations in cells is of particular interest. One measure of the damage caused to the genetic material is obtained by counting the number of adducts formed by a chemical agent at a given dose. AMS allows direct measurement of the number of adducts through stoichiometric quantification of the 14 C label attached to the DNA after exposure to a labelled carcinogen. Other isotopes of interest include tritium, 36 Cl, 79 SE, 41 Ca, 26 Al and 129 I. Our experiments with low dose environmental carcinogens reflect the protocols which will become a common part of biomedical AMS. In biomedical experiments, the researcher defines the carbon to be analyzed through dissection and/or chemical purification; thus the sample is ''merely'' combusted and graphitized at the AMS facility. However, since biomedical samples can have a 14 C range of five orders of magnitude, preparation of graphite required construction of a special manifold to prevent cross-contamination. Additionally, a strain of 14 C-depleted C57BL/6 mice is being developed to further reduce background in biomedical experiments. AMS has a bright and diverse future in radioisotope tracing. Such work requires a dedicated amalgamation of AMS scientists and biomedical researchers who will redesign experimental protocols to maximize the AMS technique and minimize the danger of catastrophic contamination. 18 refs., 4 figs., 1 tab

Same Mission, Different Look: Modernizing the AMS DataStreme Project

Science.gov (United States)

Abshire, W. E.; Kauffman, C.; Nugnes, K. A.; Geer, I. W.; Mills, E. W.; Stimach, A. E.

2017-12-01

For more than 20 years, the American Meteorological Society (AMS) has been enhancing K-12 teacher preparation and practice, and ultimately student learning through the DataStreme Project. DataStreme Atmosphere, Ocean, and Earth's Climate System (ECS), which are in close alignment with NGSS, empower teachers to implement STEM concepts in their classrooms using real-world data to deepen understanding of core science concepts and raise scientific literacy. For example, DataStreme ECS participants use the AMS Conceptual Climate Energy Model (CCEM) to explore radiative equilibrium. Then, participants use real-world NOAA data within the AMS Climate at a Glance (CAG) app to determine whether or not there is objective evidence consistent with climate change. Both the CCEM and CAG app enable participants to investigate concepts as scientists do, thereby aligning with Dimension 1 of NGSS. This presentation will highlight other ways in which DataStreme ECS aligns with the four disciplinary areas of NGSS. DataStreme courses are offered each fall and spring semester by Local Implementation Teams (LITs) across the country in coordination with AMS Education Program scientists and educators. In 2017, the AMS Education Program entered into a new agreement with California University of Pennsylvania to serve as their institutional partner for DataStreme to offer tuition-free graduate credits to participants. Some changes have already occurred and there are many opportunities for further enhancement. Most noticeably to begin, DataStreme course resources are now available to participants in all 50 states and U.S. territories through a learning management system (LMS). The use of a LMS enables LITs the opportunity to better engage their participants through online discussion boards, video assignments, shared dropbox uploads, digital assessment tools and rubrics, and much more. The Fall 2017 semester was the first term to exploit the Desire to Learn (D2L) platform for course

Aspartic acid complexation of Am(III) and U(VI)

International Nuclear Information System (INIS)

Saito, A.; Choppin, G.R.

1984-01-01

Stability constants of Am(III) and U(VI) with L-aspartic acid have been determined at pH 8.00 by means of the solvent extraction technique. It was found that Am(III) forms 1:1 and 1:2 complexes while U(VI) formed only the 1:1 complex under these conditions. The stability constants were: Am +3 : I = 0.10 M; log β 1 = 4.81 +- 0.03, log β 2 = 6.75 +- 0.03 I = 0.70 M; log β 1 = 4.53 +- 0.08 log β 2 = 6.65 +- 0.06 UO +2 2 : I = 0.70 M; log β 1 = 3.32 +- 0.04. Comparison of these stability constants with corresponding values of some dicarboxylate ligands suggests that at pH 8 the binding of Am +3 and UO +2 2 involves both carboxylates. In the Am-aspartate complex, the data indicate the possibility of weak interaction between the Am +3 and the amino group. (orig.)

Estudio descriptivo de las características sociodemográficas de la discapacidad en América Latina

Directory of Open Access Journals (Sweden)

Priscila Neves-Silva

2014-12-01

Full Text Available El objetivo de ese estudio es conocer las características socio demográficas de la discapacidad en América Latina y evaluar la metodología utilizada en las encuestas poblacionales para el análisis de la discapacidad. Es un estudio descriptivo que analiza los datos y la metodología de las encuestas de discapacidad de los países de América Latina realizadas después del 2001. Ha sido observado una grande diferencia en la prevalencia de la discapacidad encontrada en las encuestas que utilizaron la CIF para el análisis estadístico de las personas con discapacidad. Además ha sido verificado que en América Latina la discapacidad motora es la más prevalente y acomete mas los hombres con más de 65 años y con bajo nivel educacional. La principal causa es la enfermedad crónica. Concluyese que la CIF es una buena herramienta metodológica para la elaboración de encuestas de discapacidad.

2016 AMS Mario J. Molina Symposium

Energy Technology Data Exchange (ETDEWEB)

Zhang, Renyi [Texas A & M Univ., College Station, TX (United States)

2016-11-29

A named symposium to honor Dr. Mario J. Molina was held 10–14 January 2016, as part of the 96th American Meteorological Society (AMS) Annual Meeting in New Orleans, Louisiana. Dr. Molina first demonstrated that industrially produced chlorofluorocarbons (CFCs) decompose in the stratosphere and release chlorine atoms, leading to catalytic ozone destruction. His research in stratospheric chemistry was instrumental to the establishment of the 1987 United Nations Montreal Protocol to ban ozone-depleting substances worldwide. Dr. Molina’s contributions to preserving the planet Earth not only save the atmospheric ozone layer, but also protect the climate by reducing the emissions of greenhouse gases. He was awarded the 1995 Nobel Prize in Chemistry for his pioneering research in understanding the stratospheric ozone loss mechanism. In 2013, President Barack Obama announced Dr. Molina as a recipient of the Presidential Medal of Freedom. The 2016 AMS Molina Symposium honored Dr. Molina’s distinguished contributions to research related to atmospheric chemistry. The symposium contained an integrated theme related to atmospheric chemistry, climate, and policy. Dr. Molina delivered a keynote speech at the Symposium. The conference included invited keynote speeches and invited and contributed oral and poster sessions, and a banquet was held on Tuesday January 12, 2016. The symposium covered all aspects of atmospheric chemistry, with topics including (1) Stratospheric chemistry, (2) Tropospheric chemistry, (3) Aerosol nucleation, growth, and transformation, (4) Aerosol properties, (5) Megacity air pollution, and (6) Atmospheric chemistry laboratory, field, and modeling studies. This DOE project supported 14 scientists, including graduate students, post docs, junior research scientists, and non-tenured assistant professors to attend this symposium.

Judging adaptive management practices of U.S. agencies.

Science.gov (United States)

Fischman, Robert L; Ruhl, J B

2016-04-01

All U.S. federal agencies administering environmental laws purport to practice adaptive management (AM), but little is known about how they actually implement this conservation tool. A gap between the theory and practice of AM is revealed in judicial decisions reviewing agency adaptive management plans. We analyzed all U.S. federal court opinions published through 1 January 2015 to identify the agency AM practices courts found most deficient. The shortcomings included lack of clear objectives and processes, monitoring thresholds, and defined actions triggered by thresholds. This trio of agency shortcuts around critical, iterative steps characterizes what we call AM-lite. Passive AM differs from active AM in its relative lack of management interventions through experimental strategies. In contrast, AM-lite is a distinctive form of passive AM that fails to provide for the iterative steps necessary to learn from management. Courts have developed a sophisticated understanding of AM and often offer instructive rather than merely critical opinions. The role of the judiciary is limited by agency discretion under U.S. administrative law. But courts have overturned some agency AM-lite practices and insisted on more rigorous analyses to ensure that the promised benefits of structured learning and fine-tuned management have a reasonable likelihood of occurring. Nonetheless, there remains a mismatch in U.S. administrative law between the flexibility demanded by adaptive management and the legal objectives of transparency, public participation, and finality. © 2015 Society for Conservation Biology.

The diffusion coefficient for 239Pu, 241Am, 99Tc and 137Cs in highly compacted buffer materials

International Nuclear Information System (INIS)

Zhou Kanghan; Li Guoding

1998-01-01

Based on one-dimension diffusion model, the diffusion coefficients of Pu, Am, Tc and Cs in highly compacted sodium-bentonite generally used as buffer materials in geologic disposal system for high-level radioactive waste have been determined at room temperature in the atmosphere of nitrogen. The results show that the diffusion coefficients of Am, Pu and Tc and about 10 -13 ∼10 -15 m 2 /s, and that of Cs about 10 -12 m 2 /s. The diffusion coefficients of these elements decrease with the increasing of the dry density of buffer materials. From the relationship of diffusion coefficient, retardation coefficient and dry density of bentonite, it has been concluded that Am and Pu transfer predominately by diffusion in solid phase, however, Cs and Tc by diffusion in pore water

América latina y la cuestión palestina (1947-2012

Directory of Open Access Journals (Sweden)

Cecilia Baeza

2012-01-01

Full Text Available El interés de América Latina por la cuestión palestina se ha hecho visible a nivel internacional sólo recientemente con la ola de reconocimientos del Estado palestino entre diciembre de 2010 y marzo de 2011. La incorporación de esta temática en las políticas exteriores de los Estados latinoamericanos no es nueva, sin embargo. Si bien América Latina nunca desempeñó un papel sustancial en la mediación internacional del conflicto en el Medio Oriente, la centralidad del tema en las Naciones Unidas y la necesidad para Israel como para los palestinos de diversificar sus alianzas internacionales, hizo que los Estados latinoamericanos fueran regularmente convocados para tomar partido. Proponemos analizar las posiciones latinoamericanas a lo largo de los sesenta y cinco últimos años (1947-2012.

Screening for PPAR Non-Agonist Ligands Followed by Characterization of a Hit, AM-879, with Additional No-Adipogenic and cdk5-Mediated Phosphorylation Inhibition Properties

Directory of Open Access Journals (Sweden)

Helder Veras Ribeiro Filho

2018-02-01

Full Text Available Peroxisome proliferator-activated receptor gamma (PPARγ is a member of a nuclear receptor superfamily and acts as a ligand-dependent transcription factor, playing key roles in maintenance of adipose tissue and in regulation of glucose and lipid homeostasis. This receptor is the target of thiazolidinediones, a class of antidiabetic drugs, which improve insulin sensitization and regulate glycemia in type 2 diabetes. Despite the beneficial effects of drugs, such as rosiglitazone and pioglitazone, their use is associated with several side effects, including weight gain, heart failure, and liver disease, since these drugs induce full activation of the receptor. By contrast, a promising activation-independent mechanism that involves the inhibition of cyclin-dependent kinase 5 (CDK5-mediated PPARγ phosphorylation has been related to the insulin-sensitizing effects induced by these drugs. Thus, we aimed to identify novel PPARγ ligands that do not possess agonist properties by conducting a mini-trial with 80 compounds using the sequential steps of thermal shift assay, 8-anilino-1-naphthalenesulfonic acid fluorescence quenching, and a cell-based transactivation assay. We identified two non-agonist PPARγ ligands, AM-879 and P11, and one partial-agonist, R32. Using fluorescence anisotropy, we show that AM-879 does not dissociate the NCOR corepressor in vitro, and it has only a small effect on TRAP coactivator recruitment. In cells, AM-879 could not induce adipocyte differentiation or positively regulate the expression of genes associated with adipogenesis. In addition, AM-879 inhibited CDK5-mediated phosphorylation of PPARγ in vitro. Taken together, these findings supported an interaction between AM-879 and PPARγ; this interaction was identified by the analysis of the crystal structure of the PPARγ:AM-879 complex and evidenced by AM-879’s mechanism of action as a putative PPARγ non-agonist with antidiabetic properties. Moreover, we present an

O Problema Habitacional na América Latina: Exemplos do Brasil e Chile

OpenAIRE

Rubin, Graziela

2013-01-01

DOI: 10.12957/geouerj.2013.3873O presente artigo faz um resgate histórico da problemática habitacional na América Latinae traz como exemplos o Brasil e o Chile, países que apresentaram políticas interessantes para tentarresolver o problema da habitação. A partir do século XIX, com a industrialização e,consequentemente,o aumento da urbanização, as cidades da América Latina passaram a sofrer com osproblemas urbanos. Entre eles, a questão habitacional se destaca por ser um problema que afeta nos...

Hydrogeologic Setting of A/M Area: Framework for Groundwater Transport. Book 1

Energy Technology Data Exchange (ETDEWEB)

Van Pelt, R.; Lewis, S.E.; Aadland, R.K.

1994-03-11

This document includes a brief summary of the regional geology within a 200--mile radius of the A/M Area, a summary of stratigraphy and hydrostratigraphic nomenclature as it applies to the A/M Area, and a summary of stratigraphy and hydrostratigraphy specific to the A/M Area. Five different stratigraphic cross sections show site-specific geology of the Tertiary section of the Upper Atlantic Coastal Plain geologic province within the A/M Area. The Cretaceous section lacks detail because the deepest wells penetrate only the uppermost part of the Upper Cretaceous sediments. Most of the wells are confined to the Tertiary section. The A/M Area is located in the northwestern corner of the Savannah River Site (SRS). The area serves as a main administrative hub for the site. Between 1958 and 1985, approximately 2,000,000 pounds of volatile organic solvents (metal degreasers, primarily trichloroethylene and tetrachloroethylene) were routed to the M Area Settling Basin. Between 1954 and 1958, effluent also was discharged to Tim`s Branch via the A014 Outfall. In the main M Area Solvent Handling/Storage Area, a significant amount of leakage occurred from drums stored during this time period. Extensive quantities of solvents were transported, via the Process Sewer Line, to the M Area Settling Basin, and leaks occurred along this line as well. A smaller source area has been identified and is centered around the Savannah River Laboratory (SRL) (now called the Savannah River Technology Center [SRTC]) Complex. All of these source areas are represented by solvent contamination in the groundwater system. (Abstract Truncated)

Challenges of Enterprise Wide AM for Air Force Sustainment

Science.gov (United States)

2016-12-01

processes for AM across the Air Force enterprise. The opportunity for cost-effective readiness is important, and using a value chain approach that takes...December 2016 Naguy is chief of the Air Force Life Cycle Management Center’s Product Support Engineering Division at Wright Patterson Air Force Base in...produc- tion that can address many current Air Force supply chain challenges. It also can reduce weight through lightweight design while potentially

AMS prepares for long stay in space

CERN Multimedia

CERN Bulletin

2010-01-01

Following the successful space qualification tests at the ESA Technology Centre (ESTEC) in Noordwijk in the Netherlands, AMS is now back in the integration hall at CERN Prévessin. The collaboration is replacing the superconducting magnet with a permanent (non-superconducting) one, which will ensure reliable operation of the experiment for the recently planned longer run on board the International Space Station (ISS).   Work is under way at the AMS integration hall at CERN Prévessin. Following a trip to ESTEC in Noordwijk in the Netherlands, where tests confirmed its fitness for launch into space on board the International Space Station (ISS), the AMS experiment is now back at CERN for final modifications. “The collaboration agreed to adopt a modified configuration that, among other things, re-uses the permanent magnet of the AMS-01 prototype that was flown into space in 1998”, says Samuel Ting, Spokesperson of the AMS experiment. Althoug...

AMS gets lift on space shuttle Discovery

CERN Multimedia

2009-01-01

AMS-02, the CERN-recognized experiment that will seek dark matter, missing matter and antimatter in Space aboard the International Space Station (ISS), has recently got the green light to be part of the STS-134 NASA mission in 2010. Installation of AMS detectors in the Prévessin experiment hall.In a recent press release, NASA announced that the last or last-but-one mission of the Space Shuttle programme would be the one that will deliver AMS, the Alpha Magnetic Spectrometer, to the International Space Station. The Space Shuttle Discovery is due to lift off in July 2010 from Kennedy Space Center and its mission will include the installation of AMS to the exterior of the space station, using both the shuttle and station arms. "It wasn’t easy to get a lift on the Space Shuttle from the Bush administration," says professor Samuel Ting, spokesperson of the experiment, "since during his administration all the funds for space research w...

Decommissioning strategy for reactor AM, Russian Federation

International Nuclear Information System (INIS)

Suvorov, A.P.; Mukhamadeev, R.I.

2002-01-01

This paper presents the results of studies into the various aspects of decommissioning the oldest Russian research reactor, the AM reactor. Experimental and calculation results of a study to determine the inventory of long lived radioactive materials at the AM reactor are presented, along with a comparison to comparable data for other similar reactors. An analysis, by calculation, of the decay time needed to allow manual dismantling of the reactor vessel and stack, without remote operated equipment, defined it as 90 years. The possibility of burning most of the irradiated graphite to decrease the amount of long lived radioactive wastes was confirmed. The problems associated with the dismantling of the reactor components, contaminated with radioactive corrosion products, were analyzed. A decommissioning strategy for reactor AM was formed which is deferred dismantling, placing most of the radiological areas into long term safe enclosure. An overall decommissioning plan for reactor AM is given. (author)

241Am distribution and retention in pregnant mice, in their offspring and in non-pregnant mice: comparison between continuous Am administration and single injection

International Nuclear Information System (INIS)

Huevel, R. Van Den; Vander Plaetse, F.; Leppens, H.; Schoeters, G.

1992-01-01

Pregnant BALB/c mice and age and sex matched nulliparous controls were contaminated with 241 Am (13 kBq per mouse). Five days after the termination of contamination, 241 Am incorporation was measured in the tissues of adults and in the liver an the femur of newborn and one-month-old mice. Pregnancy resulted in higher 241 Am concentrations in bone but lower concentrations in the liver of the mothers. Protracted administration of 241 Am compared to a single injection resulted in a lower concentration of 241 Am in the livers of pregnant mice, their nulliparous controls and from newborn mice. The higher 241 Am concentration in the femur at birth after protected exposure before 14 days of gestation compared to protracted exposure after 14 days of gestation could reflect the increased placental transfer of 241 Am with advancing gestational age. Radiation doses to the femur were estimated between 4 and 20 mGy. Haemopoietic changes were noticed at these dose levels in all groups until at least 6 months after birth. (author)

Blob accretion in AM Herculis systems

International Nuclear Information System (INIS)

Litchfield, S.J.; King, A.R.

1990-01-01

We calculate self-consistent hydrostatic temperature distributions for the atmosphere of a white dwarf in an AM Herculis system on to which a discrete blob has accreted. We show that the surface derived from this temperature structure does not produce soft X-ray light curves characteristic of the anomalous X-ray state of AM Herculis. We suggest that non-hydrostatic splashes are a more likely origin for the light curves. (author)

Retention and distribution of 241AmIII in neonatal beagles

International Nuclear Information System (INIS)

Stevens, W.; Atherton, D.R.; Bates, D.; Lloyd, R.D.; Buster, D.S.; Bruenger, F.W.

1977-01-01

The distribution of Am in newborn beagles was studied during the first week after birth. Seven litter mates (4 males, 3 females) weighing 250-280 g were injected intravenously with 3.0 μCi 241 AmIII/kg, in citrate buffer, at 1 day of age and sacrificed 1, 3 and 5 days later. At sacrifice, livers, spleens, kidneys, other selected soft tissues and skeletons were analyzed for Am content. Cumulative excretion during the time observed was 6.7% of the injected dose, 5.5% of which occurred during the first day. Skeletal retention ranged from 76% of the injected dose at 1 day to 84% by 5 days. The skeletons of dogs given the same dose of Am at 18 months of age contained 29% of the injected Am at 1 week. The relative distribution of Am within the skeleton was dependent on the state of development of its individual bones and differed considerably from that of the young adult. In neonates, the Am content of the bones of the skull was 3 times that seen in dogs injected as young adults. Initial liver deposition of Am in neonates was only 7%, in contrast to approximately 50% in young adult beagles. The subcellular distribution of Am in liver also differed in the two age groups. In neonates, a greater fraction of the nuclide was associated with soluble proteins of the cytosol, and the increase in the Am content of mitochondria and lysosomes proceeded at a much slower rate than was observed in mature animals. (author)

Re-evaluation of the effectiveness of the central A/M Area recovery well network

International Nuclear Information System (INIS)

Haselow, J.S.

1991-06-01

A groundwater recovery well network has been operating in the central portion of the A/M Area of the Savannah River Site (SRS) since 1985 to retrieve chlorinated volatile organic solvents. In 1986, a groundwater modeling study was performed to evaluate the effectiveness of the recovery well network that included planned recovery wells (RWM 1 through 11) and process water wells (S. S. Papadopulous, 1986). Since the original modeling study, use of some of the process wells has discontinued and some pumping rates at other wells have changed. Also, the understanding of the hydrologic system in the A/M Area has improved because additional monitoring wells have been installed in the area. As a result, an updated groundwater flow model (Beaudoin et al., 1991) for the area was used to evaluate the effectiveness of the existing recovery network. The results of this study indicate that the estimated effectiveness of the recovery well has not changed dramatically since the original groundwater modeling study. However, slight differences do exist between the original study and this study because the recent model more accurately reflects the A/M Area subsurface hydrologic system

Le semis très précoce : une stratégie agronomique pour améliorer les performances du soja en France ?

Directory of Open Access Journals (Sweden)

Maury Pierre

2015-09-01

Full Text Available Le semis très précoce du soja a été étudié dans l’objectif d’améliorer le potentiel de rendement et/ou de réduire les besoins en eau. Trois variétés, appartenant à différents groupes de maturité, ont été retenues afin d’identifier les traits variétaux d’intérêt pour le semis très précoce. Un ensemble d’essais multilocaux, comportant deux modalités de semis avec irrigation, a été réalisé au cours de 5 années culturales (2010−2014. Le rendement et les besoins en eau ont été déterminés; un suivi dynamique du développement et de la croissance a été réalisé pour la variété Santana. Les effets combinés des basses températures et de la photopériode en réponse au semis précoce se traduisent par une production de biomasse aérienne réduite en phase végétative et une augmentation de la durée de remplissage des graines. Les valeurs maximales de rendement sont observées pour le semis très précoce, mais en moyenne le rendement est sensiblement plus faible en semis très précoce (3,7 t/ha vs. 3,9 t/ha. L’irrigation pour conduire les cultures dans des conditions proches de l’ETM a été sensiblement plus faible en semis très précoce (170 mm vs. 182 mm. Une variété tardive (groupe de maturité II apparaît mieux adaptée au semis très précoce qu’une variété de groupe de maturité I. Cette étude constitue une première référence agronomique d’évaluation du semis très précoce du soja et suggère que des types variétaux très tardifs pourraient améliorer le potentiel de rendement du soja en semis très précoce pour des conduites irriguées dans le Sud-Ouest de la France.

Experiencia educativa de la radio en América Latina

Directory of Open Access Journals (Sweden)

Iris Prieto

2008-01-01

Full Text Available Este trabajo presenta una visión general de la actividad que en el campo educativo ha desarrollado la radio en América Latina, destacando el modelo puesto en práctica por ACPO en Sutatenza, Colombia, imitado por otras emisoras católicas latinoamericanas que posteriormente se constituyeron en el eje fundamental para la creación de la Asociación Latinoamérica de Educación Radiofónica, ALER, convertida hoy en el sistema satelital más importante de América y del cual forma parte el Instituto Radiofónico Fe y Alegría (IRFA, organismo que con su red de emisoras, ha llevado adelante una serie de estrategias comunicacionales que le han servido para enfrentar los retos y exigencias de su acción en la educación popular. Para lograr el objetivo propuesto se hizo una revisión de varios investigadores que se han dedicado al estudio de este tema, entre los que se cuentan Lewis y Booth, Bernal, Figueroa, Geerts y Van Oeyen, García, O'Sullivan y Correa. Los resultados permiten concluir que ha sido muy importante la labor de las emisoras para la educación en América Latina.

Action-création : l’art de performance amérindien au Québec

OpenAIRE

Beaupré, Jonathan Lamy

2015-01-01

Les artistes amérindiens du Québec œuvrant en art de performance mettent en place des actions qui s’apparentent à des formes actuelles de rituels. Ces œuvres revêtent parfois un caractère poétique, voire « chamanique », sont parfois plus dérangeantes, notamment à travers la charge critique quant aux clichés associés aux Premières Nations, ou encore mélangent ces deux composantes. Elles engagent autant le corps de l’artiste que le public présent, tout en faisant de l’expression culturelle amér...

Imaging AMS

Energy Technology Data Exchange (ETDEWEB)

Freeman, S.P.H.T. [Univ. of Oxford (United Kingdom)]|[Lawrence Livermore National Lab., CA (United States); Ramsey, C.B.; Hedges, R.E.M. [Univ. of Oxford (United Kingdom)

1993-12-01

The benefits of simultaneous high effective mass resolution and large spectrometer acceptance that accelerator mass spectrometry has afforded the bulk analysis of material samples by secondary ion mass spectrometry may also be applied to imaging SIMS. The authors are exploring imaging AMS with the addition to the Oxford {sup 14}C-AMS system of a scanning secondary ion source. It employs a sub micron probe and a separate Cs flood to further increase the useful ion yield. The source has been accommodated on the system by directly injecting sputtered ions into the accelerator without mass analysis. They are detected with a range of devices including new high-bandwidth detectors. Qualitative mass spectra may be easily generated by varying only the post-accelerator analysis magnet. Selected ion signals may be used for imaging. In developing the instrument for bioscience research the authors are establishing its capability for measuring the lighter elements prevalent in biological tissue. Importantly, the machine can map the distributions of radiocarbon labeled compounds with an efficiency of about 1{per_thousand}. A background due to misidentification of non-{sup 14}C ions as a result of the reduced ion mass filtering is too small to hinder high magnification microscopy.

Report of the IAEA A+M Data Unit. Appendix 4

Energy Technology Data Exchange (ETDEWEB)

Lorenz, A. [International Atomic Energy Agency, Nuclear Data Section, Vienna (Austria)

1984-11-15

At the present time, the Agency's A+M programme consists of the following principal activities: - assessment of data needs and research coordination and support, - development of the A+M EXFOR for the storage and exchange of data, and the establishment of a numerical A+M data base, and - continuous compilation of bibliographic reference data into the A+M/BDB (Bibliographic Data Base), and the publication of the A+M Data Bulletin.

The design of a multisource americium-beryllium (Am-Be) neutron irradiation facility using MCNP for the neutronic performance calculation.

Science.gov (United States)

Sogbadji, R B M; Abrefah, R G; Nyarko, B J B; Akaho, E H K; Odoi, H C; Attakorah-Birinkorang, S

2014-08-01

The americium-beryllium neutron irradiation facility at the National Nuclear Research Institute (NNRI), Ghana, was re-designed with four 20 Ci sources using Monte Carlo N-Particle (MCNP) code to investigate the maximum amount of flux that is produced by the combined sources. The results were compared with a single source Am-Be irradiation facility. The main objective was to enable us to harness the maximum amount of flux for the optimization of neutron activation analysis and to enable smaller sample sized samples to be irradiated. Using MCNP for the design construction and neutronic performance calculation, it was realized that the single-source Am-Be design produced a thermal neutron flux of (1.8±0.0007)×10(6) n/cm(2)s and the four-source Am-Be design produced a thermal neutron flux of (5.4±0.0007)×10(6) n/cm(2)s which is a factor of 3.5 fold increase compared to the single-source Am-Be design. The criticality effective, k(eff), of the single-source and the four-source Am-Be designs were found to be 0.00115±0.0008 and 0.00143±0.0008, respectively. Copyright © 2014 Elsevier Ltd. All rights reserved.

Latest AMS Results on elementary particles in cosmic rays

Science.gov (United States)

Kounine, Andrei; AMS Collaboration

2017-01-01

AMS-02 is a particle physics detector collecting data on the International Space Station since May 2011. Precision measurements of all elementary charged cosmic ray particles have been performed by AMS using a data sample of 85 billion cosmic ray events collected during the first five years of operations on the Station. The latest AMS results on the fluxes and flux ratios of the elementary cosmic ray particles are presented. They show unique features that require accurate theoretical interpretation as to their origin, be it from dark matter collisions or new astrophysical sources. On behalf of the AMS Collaboration.

40 CFR 122.32 - As an operator of a small MS4, am I regulated under the NPDES storm water program?

Science.gov (United States)

2010-07-01

... regulated under the NPDES storm water program? 122.32 Section 122.32 Protection of Environment ENVIRONMENTAL... operator of a small MS4, am I regulated under the NPDES storm water program? (a) Unless you qualify for a... a petition to the NPDES permitting authority to require an NPDES permit for your discharge of storm...

Políticas Culturales en América Latina

Directory of Open Access Journals (Sweden)

Jaime Peña Novoa

2015-01-01

Full Text Available La autora relata la historia de las Relaciones Públicas y dice que surgieron y se desarrollaron para legitimar ante el público los intereses económicos y políticos de quienes detentan el poder. Se cuestiona sobre el por qué no aplicar las relaciones públicas, en organizaciones populares, para que mejoren su publicación y orienten sus propósitos de desarrollo. El tema que aborda las Políticas culturales en América Latina acopia un extracto de lo más trascendente de los ensayos del libro editado por Néstor García Canclini. Sobre la telenovela se afirma que esta ha llegado a ser uno de los instrumentos más importantes de la comunicación popular: por ella desfilan las identidades de las más variadas culturas brasileñas. Y en cuanto a la caricatura se relata lo que ocurrió en el Seminario taller " Caricatura y Periodismo", realizado el(9-11 de Nov.- 1987 en el CIESPAL. El estudio sobre el mercado del vídeo se ve dificultado por la imprecisión de los datos obtenidos. Los datos oficiales no siempre se aproximan a la realidad, pues el mercado de vídeo se instauró en América Latina partiendo de una lógica totalmente diversa de los equipos de sonido e imagen.

Behavior of Am in acidic and basic solutions of potassium ferri/ferrocyanide

International Nuclear Information System (INIS)

Kulyako, Yu.M.; Trofimov, T.I.; Malikov, D.A.; Lebedev, I.A.; Myasoedov, B.F.

1994-01-01

The behavior of Am in acidic and basic solutions containing the Fe(CN) 3- 6 /Fe(CN) 4- 6 redox system is studied. In mineral acids, K 3 Fe(CN) 6 and Am(III) form the poorly soluble compound AmFe(CN) 6 , which with time undergoes a change owing to radiolytic reduction of Fe(CN) 3- 6 to Fe(CN) 4- 6 . In basic solutions of K 3 Fe(CN) 6 , Am(III) is oxidized to AmO + 2 , forming the soluble complex (AmO 2 ) 3 Fe(CN) 6 , which gradually decomposes to produce the solid double hydroxide Na 2 AmO 2 (OH) 3 ·nH 2 O. An Am(IV) hydroxide is formed if [Am] and [K 3 Fe(CN) 6 ] are equal

Effect of gavaged chemical form of 241Am on its retention in mice

International Nuclear Information System (INIS)

Hisamatsu, S.; Takizawa, Y.

1987-01-01

The retention of 241 Am in mice 48 h after administration by gavage is reported here. The 241 Am was given to mice in the form of either 241 Am nitrate or 241 Am citrate. The 241 Am was also injected into rats in the same form. The homogenized livers of those rats were subsequently administered by gavage to another group of mice. The retention of 241 Am citrate was 1.5 X 10(-2)% of the original dose and was the highest among the compounds examined. The retention of biologically incorporated 241 Am into the liver as 241 Am nitrate and as 241 Am citrate was 2.4 X 10(-3) and 2.6 X 10(-3)%, respectively, and was similar to the retention of 241 Am nitrate, which was 2.8 X 10(-3)%. The ratio of the retention in the carcass to that in the liver for the 241 Am citrate was lower than that of the 241 Am nitrate and the biologically incorporated 241 Am. This difference indicates that the distribution of 241 Am in the animal body depends on the chemical form administered. The retention of liver-incorporated 241 Am as citrate after autolysis of the liver is similar to that of fresh liver-incorporated 241 Am citrate

Kusheh, na minem Fatu, en mi na koko farmer Hello, I am Fatu and I am a cocoa farmer

NARCIS (Netherlands)

Witteveen, L.M.; Goris, Margriet; Lie, R.; Ingram, V.J.

2016-01-01

This document reports on the development of a prototype Digital Farmer Field School (DFFS) called Kusheh, na minem Fatu, en mi na koko farmer (“Hello, I am Fatu and I am a cocoa farmer”). The DFFS provides an ICT-based alternative to traditional agricultural extension. More specifically, it offers a

Effects of silicon on mechanical properties of AM60 magnesium alloy

Directory of Open Access Journals (Sweden)

Hu Yong

2012-08-01

Full Text Available Silicon was added to improve the tensile, wear and creep behaviors of AM60 magnesium alloy in this study. The investigation has been undertaken by means of universal testing machine, HBE-3000A Brinell hardness tester, M-2000 friction-wear machine, DMA-Q800 creep machine, optical microscopy (OM and scanning electron microscopy (SEM. The results indicate that the Chinese script type Mg2Si particles are formed by adding Si into the AM60 magnesium alloy. The ultimate tensile strength and hardness of the AM60 magnesium alloy increases with the Si addition, and the ultimate tensile strength and hardness of the AM60+1.0wt.%Si alloy are increased by 12% and 19.8%, respectively in comparison with that of the AM60 magnesium alloy. The wear property and the high temperature creep property of the AM60 magnesium alloy are also improved with Si addition. The wear mechanisms of the AM60 and AM60+1.0wt.%Si alloys are adhesive wear and abrasion wear, respectively. While, the elongation of the AM60 magnesium alloy decreases with the addition of Si. The optimum Si addition content is 1.0wt.%.

Beryllium-10: Half-life and AMS-standards

International Nuclear Information System (INIS)

Hofmann, H.J.; Beer, J.; Bonani, G.; von Gunten, H.R.; Raman, S.; Suter, M.; Walker, R.L.; Woelfli, W.; Zimmermann, D.

1987-01-01

Absolute AMS measurements of 10 Be require reliable standards for calibration. Among the existing standards, rather large differences have been observed. These differences were found partially to be due to the different half-life values which were assumed. Also for comparison of AMS data with activity measurements, it is necessary to know the 10 Be half-life as precisely as possible. Starting with 5 ml of the standardized ORNL-MASTER solution, a working solution with a well-defined 10 Be content was prepared. Its specific activity was determined by liquid scintillation counting. This measurement yielded a new value of (1.52 +- 0.05) My for the 10 Be half-life, which is in agreement with the previously reported values but is about three times more accurate. Two independent dilution series produced new AMS standards with 10 Be/ 9 Be ratios of the order of 10 -10 and 10 -11 . These standards were measured at the ETH/SIN AMS facility with high accuracy and are compared with other available 10 Be standards. 15 refs, 2 figs., 3 tabs

sup 241 Am distribution and retention in pregnant mice, in their offspring and in non-pregnant mice: comparison between continuous Am administration and single injection

Energy Technology Data Exchange (ETDEWEB)

Huevel, R. Van Den; Vander Plaetse, F.; Leppens, H.; Schoeters, G. (Centre d' Etude de l' Energie Nucleaire, Mol (Belgium))

1992-01-01

Pregnant BALB/c mice and age and sex matched nulliparous controls were contaminated with {sup 241}Am (13 kBq per mouse). Five days after the termination of contamination, {sup 241}Am incorporation was measured in the tissues of adults and in the liver an the femur of newborn and one-month-old mice. Pregnancy resulted in higher {sup 241}Am concentrations in bone but lower concentrations in the liver of the mothers. Protracted administration of {sup 241}Am compared to a single injection resulted in a lower concentration of {sup 241}Am in the livers of pregnant mice, their nulliparous controls and from newborn mice. The higher {sup 241}Am concentration in the femur at birth after protected exposure before 14 days of gestation compared to protracted exposure after 14 days of gestation could reflect the increased placental transfer of {sup 241}Am with advancing gestational age. Radiation doses to the femur were estimated between 4 and 20 mGy. Haemopoietic changes were noticed at these dose levels in all groups until at least 6 months after birth. (author).

Towards direction dependent fluxes with AMS-02

Energy Technology Data Exchange (ETDEWEB)

Zeissler, Stefan; Andeen, Karen; Boer, Wim de; Gebauer, Iris; Merx, Carmen; Nikonov, Nikolay; Vagelli, Valerio [Karlsruher Institut fuer Technologie KIT (Germany)

2015-07-01

The Alpha Magnetic Spectrometer (AMS-02) is a state-of-the-art particle physics detector designed to operate as an external module on the International Space Station (ISS). In the unique space environment cosmic particles can be measured with high precision over an energy range from GeV up to TeV. In 2014 electron and positron flux measurements where published which indicate an additional source of positrons among the various cosmic particles. The arrival directions of energetic positrons and electrons convey fundamental information on their origin. We evaluate the AMS-02 detector acceptance for each incoming particle direction and show preliminary results of a direction dependent measurement of the AMS-02 lepton flux.

Ion sources in AMS

International Nuclear Information System (INIS)

Iyer, Indira S.

1997-01-01

Accelerator Mass Spectrometry (AMS) entails the sputtering of various samples in an ion source followed by high precision mass analysis of the sputtered ion species in a Tandem Electrostatic Accelerator. A brief account is given

Operation of the AM-50 cutting head under different cutting conditions

Energy Technology Data Exchange (ETDEWEB)

Sikora, W; Kusz, F; Fels, M

1988-02-01

Presents results of investigations into operation of the AM-50 heading machine. About 50% of headings, i.e. about 800 km/a, are driven by about 400 heading machines. It has been found that energy consumption depends on compression strength of rock and is 6 times higher for sandstone than for clayey shale. Power consumed by cutting heads depends mainly on the web used (30-150 mm depending on rock strength). Wear of cutting tools is 1-30 pieces per meter of heading advance at a working cross-section area of 15 m/sup 2/. The AM-50 machine uses cutting speeds of 1.1-3.5 m/s. Higher speeds negatively affect the resistance to cutting. Nonuniform tool wear on the cutting head circumference is an indication of improper head design that requires remedying.

AMS: Area Message Service for SLC

International Nuclear Information System (INIS)

Crane, M.; Mackenzie, R.; Millsom, D.; Zelazny, M.

1993-04-01

The Area Message Service (AMS) is a TCP/IP based messaging service currently in use at SLAC. A number of projects under development here at SLAC require and application level interface to the 4.3BSD UNIX socket level communications functions using TCP/IP over ethernet. AMS provides connection management, solicited message transfer, unsolicited message transfer, and asynchronous notification of pending messages. AMS is written completely in ANSI 'C' and is currently portable over three hardware/operating system/network manager platforms, VAX/VMS/Multinet, PC/MS-DOS/Pathworks, VME 68K/pSOS/pNA. The basic architecture is a client-server connection where either end of the interface may be the server. This allows for connections and data flow to be initiated from either end of the interface. Included in the paper are details concerning the connection management, the handling of the multi-platform code, and the implementation process

El concepto de "América profunda" en el cine estadounidense de terror (1960-2014)

OpenAIRE

Alés Fernández, Rocío

2015-01-01

El presente estudio profundiza en el "reverso tenebroso" de la cultura norteamericana a través del cine de terror moderno estadounidense, a través través de una investigación sobre el reverso tenebroso del estereotipo de la "América profunda" en la literatura, en el cine y en las artes plásticas.

SystemC and systemC-AMS in practice systemC 2.3, 2.2 and systemC-AMS 1.0

CERN Document Server

Banerjee, Amal

2013-01-01

This book describes how engineers can make optimum use of the two industry standard analysis/design tools, SystemC and SystemC-AMS.  The authors use a system-level design approach, emphasizing how SystemC and SystemC-AMS features can be exploited most effectively to analyze/understand a given electronic system and explore the design space. The approach taken by this book enables system engineers to concentrate on only those SystemC/SystemC-AMS features that apply to their particular problem, leading to more efficient design. The presentation includes numerous, realistic and complete examples,

S-Amlodipine: An Isomer with Difference—Time to Shift from Racemic Amlodipine

Directory of Open Access Journals (Sweden)

Jamshed Dalal

2018-01-01

Full Text Available Calcium channel blockers are among the first-line drugs for treatment of hypertension (HTN. S-amlodipine (S-AM, an S-enantiomer of amlodipine, is available in India and in other countries like China, Korea, Russia, Ukraine, and Nepal. Being clinically researched for nearly two decades, we performed in-depth review of S-AM. This review discusses clinical evidence from total 42 studies (26 randomized controlled trials, 14 observational studies, and 2 meta-analyses corroborating over 7400 patients treated with S-AM. Efficacy and safety of S-AM in HTN in comparison to racemic amlodipine, used as monotherapy and in combination with other antihypertensives, efficacy in angina, and pleiotropic benefits with S-AM, are discussed in this review.

Biochemical paths in humans and cells: Frontiers of AMS bioanalysis

International Nuclear Information System (INIS)

Vogel, J.S.; Palmblad, N.M.; Ognibene, T.; Kabir, M.M.; Buchholz, B.A.; Bench, G.

2007-01-01

The publication rate of 3 H and 14 C use in biomedical research decreased by a factor of three since 1990 when the first applications of AMS in biomedicine were published. Against this decrease, the high sensitivity of AMS for these isotopes in small isolated samples has made significant contributions. New smaller spectrometers and increased commercial availability of AMS have solved some of the issues surrounding availability and cost, but improved quantitation in non-isotopic methods now compete with some early uses of AMS. We review the strength of AMS for quantifying rare biochemical events and chemical passages through individual people or cells and consider these as the frontiers of quantitation leading to profitable science unavailable to other techniques

Neutron capture cross section of ^243Am

Science.gov (United States)

Jandel, M.

2009-10-01

The Detector for Advanced Neutron Capture Experiments (DANCE) at Los Alamos National Laboratory (LANL) was used for neutron capture cross section measurement on ^243Am. The high granularity of DANCE (160 BaF2 detectors in a 4π geometry) enables the efficient detection of prompt gamma-rays following neutron capture. DANCE is located on the 20.26 m neutron flight path 14 (FP14) at the Manuel Lujan Jr. Neutron Scattering Center at the Los Alamos Neutron Science Center (LANSCE). The methods and techniques established in [1] were used for the determination of the ^243Am neutron capture cross section. The cross sections were obtained in the range of neutron energies from 0.02 eV to 400 keV. The resonance region was analyzed using SAMMY7 and resonance parameters were extracted. The results will be compared to existing evaluations and calculations. Work was performed under the auspices of the U.S. Department of Energy at Los Alamos National Laboratory by the Los Alamos National Security, LLC under Contract No. DE-AC52-06NA25396 and at Lawrence Livermore National Laboratory by the Lawrence Livermore National Security, LLC under Contract No. DE-AC52-07NA27344. [4pt] [1] M. Jandel et al., Phys. Rev. C78, 034609 (2008)

[Barack Obama et le « rêve américain »

OpenAIRE

Dumont , Gérard-François

2009-01-01

International audience; The “American dream” : an old concept which incorporates a strong demographic component; indeed it is inseparable from the migratory flows involving the United States. Barack Obama’s election also integrated this aspect, with the new president declaring during his campaign that he wanted to keep the American dream alive.; Notion ancienne, le « rêve américain » compte une forte dimension démographique, car il est indissociable des courants migratoires liés aux États-Uni...

The Alpha Magnetic Spectrometer (AMS)

International Nuclear Information System (INIS)

Alcaraz, J.; Alpat, B.; Ambrosi, G.; Anderhub, H.; Ao, L.; Arefiev, A.; Azzarello, P.; Babucci, E.; Baldini, L.; Basile, M.; Barancourt, D.; Barao, F.; Barbier, G.; Barreira, G.; Battiston, R.; Becker, R.; Becker, U.; Bellagamba, L.; Bene, P.; Berdugo, J.; Berges, P.; Bertucci, B.; Biland, A.; Bizzaglia, S.; Blasko, S.; Boella, G.; Boschini, M.; Bourquin, M.; Brocco, L.; Bruni, G.; Buenerd, M.; Burger, J.D.; Burger, W.J.; Cai, X.D.; Camps, C.; Cannarsa, P.; Capell, M.; Casadei, D.; Casaus, J.; Castellini, G.; Cecchi, C.; Chang, Y.H.; Chen, H.F.; Chen, H.S.; Chen, Z.G.; Chernoplekov, N.A.; Chiueh, T.H.; Chuang, Y.L.; Cindolo, F.; Commichau, V.; Contin, A.; Crespo, P.; Cristinziani, M.; Cunha, J.P. da; Dai, T.S.; Deus, J.D.; Dinu, N.; Djambazov, L.; DAntone, I.; Dong, Z.R.; Emonet, P.; Engelberg, J.; Eppling, F.J.; Eronen, T.; Esposito, G.; Extermann, P.; Favier, J.; Fiandrini, E.; Fisher, P.H.; Fluegge, G.; Fouque, N.; Galaktionov, Yu.; Gervasi, M.; Giusti, P.; Grandi, D.; Grimm, O.; Gu, W.Q.; Hangarter, K.; Hasan, A.; Hermel, V.; Hofer, H.; Huang, M.A.; Hungerford, W.; Ionica, M.; Ionica, R.; Jongmanns, M.; Karlamaa, K.; Karpinski, W.; Kenney, G.; Kenny, J.; Kim, W.; Klimentov, A.; Kossakowski, R.; Koutsenko, V.; Kraeber, M.; Laborie, G.; Laitinen, T.; Lamanna, G.; Laurenti, G.; Lebedev, A.; Lee, S.C.; Levi, G.; Levtchenko, P.; Liu, C.L.; Liu, H.T.; Lopes, I.; Lu, G.; Lu, Y.S.; Luebelsmeyer, K.; Luckey, D.; Lustermann, W.; Mana, C.; Margotti, A.; Mayet, F.; McNeil, R.R.; Meillon, B.; Menichelli, M.; Mihul, A.; Mourao, A.; Mujunen, A.; Palmonari, F.; Papi, A.; Park, I.H.; Pauluzzi, M.; Pauss, F.; Perrin, E.; Pesci, A.; Pevsner, A.; Pimenta, M.; Plyaskin, V.; Pojidaev, V.; Postolache, V.; Produit, N.; Rancoita, P.G.; Rapin, D.; Raupach, F.; Ren, D.; Ren, Z.; Ribordy, M.; Richeux, J.P.; Riihonen, E.; Ritakari, J.; Roeser, U.; Roissin, C.; Sagdeev, R.; Sartorelli, G.; Schultz von Dratzig, A.; Schwering, G.; Scolieri, G.; Seo, E.S.; Shoutko, V.; Shoumilov, E.; Siedling, R.; Son, D.; Song, T.; Steuer, M.; Sun, G.S.; Suter, H.; Tang, X.W.; Ting, S.C.C.Samuel C.C.; Ting, S.M.; Tornikoski, M.; Torsti, J.; Tr umper, J.; Ulbricht, J.; Urpo, S.; Usoskin, I.; Valtonen, E.; Vandenhirtz, J.; Velcea, F.; Velikhov, E.; Verlaat, B.; Vetlitsky, I.; Vezzu, F.; Vialle, J.P.; Viertel, G.; Vite, D.; Gunten, H. Von; Wicki, S.W.S. Waldmeier; Wallraff, W.; Wang, B.C.; Wang, J.Z.; Wang, Y.H.; Wiik, K.; Williams, C.; Wu, S.X.; Xia, P.C.; Yan, J.L.; Yan, L.G.; Yang, C.G.; Yang, M.; Ye, S.W.; Yeh, P.; Xu, Z.Z.; Zhang, H.Y.; Zhang, Z.P.; Zhao, D.X.; Zhu, G.Y.; Zhu, W.Z.; Zhuang, H.L.; Zichichi, A.; Zimmermann, B.

2002-01-01

The Alpha Magnetic Spectrometer (AMS) is a large acceptance (0.65 sr m 2 ) detector designed to operate in the International Space Station (ISS) for three years. The purposes of the experiment are to search for cosmic antimatter and dark matter and to study the composition and energy spectrum of the primary cosmic rays. A 'scaled-down' version has been flown on the Space Shuttle Discovery for 10 days in June 1998. The complete AMS is programmed for installation on the ISS in October 2003 for an operational period of 3 yr. This contribution reports on the experimental configuration that will be installed on the ISS

Les cultures régénératrices du sol sont essentielles à l'amélioration ...

International Development Research Centre (IDRC) Digital Library (Canada)

Ce projet promouvra des manières d'encourager l'utilisation des technologies de culture des légumineuses améliorées, utilisées sur les sites pilotes, dans plusieurs régions du sud de l'Éthiopie. Il montrera l'incidence ... L'importance des services de garde d'enfants pour améliorer les possibilités économiques des femmes.

El registro más antiguo de Hippidion Owen, 1869 (Mammalia, Perissodactyla en América del Sur

Directory of Open Access Journals (Sweden)

Reguero, M. A.

1998-04-01

Full Text Available The presence of Hippidion devillei in the Esquina Blanca locality (Jujuy, Argentina is confirmed and following the paleomagnetic data is placed near to the Matuyama/Gauss boundary. These remains represent the oldest record of Hippidion in South America. We consider that the validity of the Uquian Land Mammal Age should not be discarded in consideration that the Uquia region is better endowed than the Pampean.Se confirma la presencia de Hippidion devillei en la localidad de Esquina Blanca (Jujuy, Argentina y se sitúa, a partir de los datos paleomagnéticos, en una edad cercana al límite Matuyama/Gauss. Estos restos representan el registro más antiguo de esta especie en América del Sur. Consideramos que no se debe descartar la validez de la «Edad mamífero » Uquiense descrita por primera vez en esta región por tener ventajas sobre los afloramientos de la costa Bonaerense.

Programme de recherche sur le virus Zika Canada-Amérique latine ...

International Development Research Centre (IDRC) Digital Library (Canada)

'éclosion virale et à la menace que ce virus représente pour la santé des populations affectées dans les pays d'Amérique Latine et des Caraïbes les plus durement touchés. Les Instituts de Recherche en Santé Canadiens et ...

Solidago canadensis und Solidago gigantea in Frankfurt am Main

OpenAIRE

Ottich, Indra

2015-01-01

Die beiden nordamerikanischen Goldruten-Arten Solidago canadensis und S. gigantea sind in Mitteleuropa weit verbreitet. Häufig wird nicht zwischen den beiden Arten unterschieden, die Angaben zur Ökologie scheinen für beide Arten weitgehend identisch. Durch eine Rasterkartierung des Stadtgebietes von Frankfurt am Main wird gezeigt, dass die Arten jedoch unterschiedliche Ansprüche haben. Während Solidago canadensis sehr häufig ist und alle typisch städtischen Bereiche besiedelt, wird Solidago g...

Indirect search for dark matter with AMS

International Nuclear Information System (INIS)

Goy, Corinne

2006-01-01

This document summarises the potential of AMS in the indirect search for Dark Matter. Observations and cosmology indicate that the Universe may include a large amount of Dark Matter of unknown nature. A good candidate is the Ligthest Supersymmetric Particle in R-Parity conserving models. AMS offers a unique opportunity to study Dark Matter indirect signature in three spectra: gamma, antiprotons and positrons

AMS: Area Message Service for SLC

International Nuclear Information System (INIS)

Crane, M.; Mackenzie, R.; Millsom, D.; Zelazny, M.

1993-01-01

The Area Message Service (AMS) is a TCP/IP based messaging service currently in use at SLAC. A number of projects under development here at SLAC require an application level interface to the 4.3BSD UNIX socket level communications functions using TCP/IP over ethernet. AMS provides connection management, solicited message transfer, unsolicited message transfer, and asynchronous notification of pending messages. AMS is written completely in ANSI open-quote C close-quote and is currently portable over three hardware/operating system/network manager platforms, VAX/VMS/Multinet, PC/MS-DOS/Pathworks, VME 68K/pSOS/pNA. The basic architecture is a client-server connection where either end of the interface may be the server. This allows for connections and data flow to be initiated from either end of the interface. Included in the paper are details concerning the connection management, the handling of the multi-platform code, and the implementation process

The ETH Zurich AMS facilities: Performance parameters and reference materials

Energy Technology Data Exchange (ETDEWEB)

Christl, M., E-mail: mchristl@phys.ethz.ch [Laboratory of Ion Beam Physics, ETH Zurich, 8093 Zurich (Switzerland); Vockenhuber, C.; Kubik, P.W.; Wacker, L.; Lachner, J.; Alfimov, V.; Synal, H.-A. [Laboratory of Ion Beam Physics, ETH Zurich, 8093 Zurich (Switzerland)

2013-01-15

The current performance of all three AMS systems in operation at ETH Zurich, the 6 MV HVEC EN-Tandem facility 'TANDEM', the 0.5 MV NEC Pelletron 'TANDY', and the 0.2 MV system 'MICADAS' is summarized. Radionuclides routinely measured with these AMS systems include {sup 10}Be, {sup 14}C, {sup 26}Al, {sup 36}Cl, {sup 41}Ca, {sup 129}I and the actinides. The reference materials used for the normalization of the AMS measurements at the ETH Zurich AMS facilities are presented. This paper therefore is a comprehensive status report of all three AMS systems currently operated by the Laboratory of Ion Beam Physics (LIP) at ETH Zurich and documents their performance and operation parameters.

LA CRISIS FINANCIERA INTERNACIONAL. Ocho lecciones de y para América Latina

Directory of Open Access Journals (Sweden)

Liliana Rojas-Suarez

2013-01-01

Full Text Available La crisis financiera internacional del 2008-2009 puso de manifiesto las fortalezas y debilidades del paradigma prevaleciente en materia de desarrollo en América La-tina. Éste se basa en una cuenta de capitales liberada que a su vez ha mejorado de manera importante las condiciones macroeconómicas. Este artículo proporciona lecciones provenientes de la crisis, no solamente para la región, sino para otros paí-ses en desarrollo que buscan conseguir crecimiento económico en un contexto de mayor integración a los mercados internacionales de capital. Algunas de las lec-ciones no son nuevas pero han sido reforzadas con la crisis, como la necesidadde que América Latina diversifique sus exportaciones (no sólo de productos sino de socios comerciales. Otras lecciones desmitifican otros elementos, como por ejem-plo la imposibilidad de aplicar políticas contracíclicas, al menos del lado moneta-rio. Otras lecciones incluyen i el papel relativo de la banca nacional y extranjera como amortiguadores de los choques financieros externos, y ii el costo potencial de adoptar regulaciones financieras internacionales que no tomen en consideración el desarrollo de cada país. Tomadas en conjunto, las lecciones arrojan un nuevo sentido de optimismo para el crecimiento de América Latina.

Some problems in mechanics of growing solids with applications to AM technologies

Science.gov (United States)

Manzhirov, A. V.

2018-04-01

Additive Manufacturing (AM) technologies are an exciting area of the modern industrial revolution and have applications in engineering, medicine, electronics, aerospace industry, etc. AM enables cost-effective production of customized geometry and parts by direct fabrication from 3D data and mathematical models. Despite much progress in AM technologies, problems of mechanical analysis for AM fabricated parts yet remain to be solved. This paper deals with three main mechanical problems: the onset of residual stresses, which occur in the AM process and can lead to failure of the parts, the distortion of the final shape of AM fabricated parts, and the development of technological solutions aimed at improving existing AM technologies and creating new ones. An approach proposed deals with the construction of adequate analytical model and effective methods for the simulation of AM processes for fabricated solid parts.

LANDSAT-D data format control book. Volume 6, appendix G: GSFC HDT-AM inventory tape (GHIT-AM)

Science.gov (United States)

1981-01-01

The data format specifications of the Goddard HDT inventory tapes (GHITS), which accompany shipments of archival digital multispectral scanner image data (HDT-AM tapes), are defined. The GHIT is a nine-track, 1600-BPI tape which conforms to the ANSI standard and serves as an inventory and description of the image data included in the shipment. The archival MSS tapes (HDT-AMs) contain radiometrically corrected but geometrically uncorrected image data plus certain ancillary data necessary to perform the geometric corrections.

JOSÉ MARTÍ - život a dílo se zaměřením na jeho eseje Madre América a Nuestra América

OpenAIRE

Bočková, Sandra

2015-01-01

In my Bachelor thesis entitled "JOSÉ MARTÍ - life and work with orientation to his essays Madre América and Nuestra América" I am going to pursue two of his principal essays titled Madre América and Nuestra América which contain Marti's ideas related to the self- determination of the nations of Latin America. In order to analyse the respective themes, I consider necessary to introduce the author first. In my opinion, José Martí is one of the most important figures in the Cuban colonial era; h...

AM: An Artificial Intelligence Approach to Discovery in Mathematics as Heuristic Search

Science.gov (United States)

1976-07-01

deficiency . The idea of "Intuitions" facets was a flop. Intuitions were meant to model reality, at least little pieces of it, so that AM could...Discovery in Mathematic, as Heuristic Search -323- s Tk2 ** Check examples of Single-ADD, because many examples have recently been found, but not yet

AMS/NRCan Joint Survey Report: Aerial Campaign

Energy Technology Data Exchange (ETDEWEB)

Wasiolek, Piotr [National Security Technologies, LLC. (NSTec), Mercury, NV (United States); Stampahar, Jez [National Security Technologies, LLC. (NSTec), Mercury, NV (United States); Malchow, Rusty [National Security Technologies, LLC. (NSTec), Mercury, NV (United States); Stampahar, Tom [National Security Technologies, LLC. (NSTec), Mercury, NV (United States); Lukens, Mike [National Security Technologies, LLC. (NSTec), Mercury, NV (United States); Seywerd, Henry [Natural Resources Canada (Canada); Fortin, Richard [Natural Resources Canada (Canada); Harvey, Brad [Natural Resources Canada (Canada); Sinclair, Laurel [Natural Resources Canada (Canada)

2014-12-31

In January 2014 the U.S. Department of Energy (DOE), National Nuclear Security Administration (NNSA) Aerial Measuring System (AMS) and the Natural Resources Canada (NRCan) Nuclear Emergency Response project conducted a series of joint surveys at a number of locations in Nevada including the Nevada National Security Site (NNSS). The goal of this project was to compare the responses of the two agencies’ aerial radiation detection systems and data analysis techniques. This test included varied radioactive surface contamination levels and isotopic composition experienced at the NNSS and the differing data processing techniques utilized by the respective teams. Because both teams used the commercial aerial radiation detection systems from Radiation Solutions, Inc., the main focus of the campaign was to investigate the data acquisition techniques, data analysis, and ground-truth verification. The NRCan system consisted of four 4" × 4" × 16" NaI(Tl) scintillator crystals of which two were externally mounted in a modified commercial cargo basket certified for the Eurocopter AS350; the NNSA AMS system consisted of twelve 2" × 4" × 16" NaI(Tl) crystals in externally mounted dedicated pods. For NRCan, the joint survey provided an opportunity to characterize their system’s response to extended sources of various fission products at the NNSS. Since both systems play an important role in their respective countries’ national framework of radiological emergency response and are subject to multiple mutual cooperation agreements, it was important for each country to obtain more thorough knowledge of how they would employ these important assets and define the roles that they would each play in an actual response.

Améliorer la performance organisationnelle : Manuel d'auto-évaluation

International Development Research Centre (IDRC) Digital Library (Canada)

Avez-vous pris la mesure de la performance réelle de votre organisation ? Dans le cas contraire, en connaissez-vous la cause ? Ce manuel présente un modèle d'auto-évaluation organisationnelle novateur et opportunément éprouvé. Les instruments et les conseils proposés dans Améliorer la performance ...

[Effects of grain-sized moxibustion from 7 am to 9 am on circadian rhythm of inflammatory factor IL-6 in rats with rheumatoid arthritis].

Science.gov (United States)

Ma, Wenbin; Liu, Xuguang; Qin, Yong; Zhou, Haiyan; Yang, Xin

2016-04-01

To explore the rhythm regulatory mechanism of interleukin-6 (IL-6) in the process of moxibustion for rheumatoid arthritis (RA). A total of 144 Sprague-Dawley (SD) rats were randomly divided into a blank group, a model group, a moxibustion group, a sham operation group, an operation group, an operation+moxibustion group, 24 rats in each one. Each group was divided into 4 time points (0:00 am, 6:00' am, 12:00 am, 6:00 pm), 6 rats in each time point. The Light-Dark 12 : 12 was given in all rats for light-dark cycle. Except the blank group, rats in the remaining groups were treated with intracutaneous injection of freund's complete adjuvant at right-side foot to establish the model of RA. After the model establishment, bilateral adrenal, glands were removed in the operation group and operation + moxibustion group, while those in the sham operation group were not removed with identical operation procedure. Rats in the moxibustion group and operation + moxibustion group were treated with grain-sized moxibustion from 7:00 am to 9:00 am at "Shenshu" (BL 23) and "Zusanli" (ST 36) once everyday, 6 times were taken as one session and 3 sessions were required tatclly, while rats in the remaining groups received identical fixation without moxibustion. The general health state and foot volume of rats were measured before model establishment, after establishment and after treatment. After treatment, rats were sacrificed at each time point to collect the blood sample and measure the content of IL-6 by using enzymne-immunoassay method. Compared with the blank group, the foot swelling in the model group was obviously increased (Pcircadian rhythm (Pcircadian. rhythm (Pcircadian rhythm (P circadian rhythm in RA rats; with the complete hypothalamic-pituitary-adrenal axis, moxibustion is likely to regulate the circadian rhythm of IL-6 to play an important role of anti-inflammatory effect in RA rats.

I’m incredible—or am I? : On the socialization of fragile self-views in children

NARCIS (Netherlands)

Brummelman, E.

2015-01-01

I’m incredible—or am I? This is a recurring and daunting question for children with fragile self-views, whose feelings of self-worth crumble in the face of setbacks. What are the origins of children’s fragile self-views, and how can interventions reduce the fragility of children’s self-views? The

Placental transfer and distribution of 241Am in the rat

International Nuclear Information System (INIS)

Hisamatsu, S.; Takizawa, Y.

1983-01-01

The placental transfer and distribution of 241 Am in the feto-placental system were studied in pregnant rats. Rats were injected intravenously with 241 Am citrate at 15 or 18 days of gestation. Groups injected at 15 days of gestation were sacrificed 2, 24, 48, or 120 hr after injection, and the group injected at 18 days was sacrificed 24 hr after. The radioactivities of 241 Am in fetus, fetal membrane, and placenta were determined, and its distribution in the feto-placental system was investigated by high-speed autoradiography using a silver-activated zinc sulfide-coated membrane as an intensifying screen. The deposition of 241 Am in feto-placenta units increased with the number of days of gestation. Results of autoradiography revealed that major deposition sites of 241 Am in the fetus are the skeleton and liver. Heavy deposition of 241 Am in the yolksac splanchnopleure and its existence in the exocoelom strongly suggest that the yolk sac placenta plays an important role in the placental transfer of this nuclide

AmE 2012. Automotive meets electronics

Energy Technology Data Exchange (ETDEWEB)

NONE

2012-11-01

This conference CD contains 19 contributions, which were presented at the AmE 2012. The main topics were: (1) Electrification; (2) High voltage (board networks) and electromagnetic compatibility; (3) Car-to-X and driver assistance; (4) Diagnosis; (5) Electrical systems. Six contributions were recorded separately for the ENERGY database. [German] Diese Tagungs-CD enthaelt 19 Beitraege, die auf der AmE 2012 vorgestellt wurden. Die Themenschwerpunkte waren: 1. Electrification; 2. Hochvolt(-bordnetze) und Elektromagnetische Vertraeglichkeit; 3. Car-to-X und Fahrerassistenz; 4. Diagnose; 5. Bordnetze. Sechs Beitraege wurden separat fuer die ENERGY-Datenbank aufgenommen.

Zigzag et « carré plastique » haïtiens en Amérique du nord à travers l’Autobiographie américaine de Dany Laferrière

OpenAIRE

Olivier-Messonnier, Laurence

2015-01-01

L’ « Autobiographie américaine » de Dany Laferrière et le « carré plastique » de Léonel Jules, artistes et amis haïtiens émigrés au Québec, déconstruisent la ville américaine par l’éclatement textuel et la plasticité picturale. Mythifient-ils pour autant le berceau natal ? L’écriture plastique et poétique efface les frontières. The « American Autobiography » by Dany Laferrière and the « Carré Plastique » by Léonel Jules, Haitian artists and friends who emigrated to Quebec, deconstruct the ...

Conjugal plasmid transfer (pAM beta 1) in Lactobacillus plantarum.

OpenAIRE

Shrago, A W; Chassy, B M; Dobrogosz, W J

1986-01-01

The streptococcal plasmid pAM beta 1 (erythromycin resistance) was transferred via conjugation from Streptococcus faecalis to Lactobacillus plantarum and was transferred among L. plantarum strains. Streptococcus sanguis Challis was transformed with pAM beta 1 isolated from these transconjugants, and transformants harboring intact pAM beta 1 could conjugate the plasmid back to L. plantarum.

Study of the properties of the Am-O system in view of the transmutation of Am 241 in fast reactors; Etude des proprietes du systeme Am-O en vue de la transmutation de l`americium 241 en reacteur a neutrons rapides

Energy Technology Data Exchange (ETDEWEB)

Casalta, S

1996-04-01

To reduce the long term toxicity of Am 241 it was considered to transmute this isotope in fast reactor. The first part of this thesis is an introduction at this problem. In the second part we give the experimental techniques used for the realisation of an AmO{sub 2}-MgO target (powder metallurgy under inert, oxidizing or reducing atmosphere). The properties of the Am-O system has been analyzed by X diffraction, thermodynamic and ceramography, in the Am{sub 2}O{sub 3}-AmO{sub 2} field. In the third part we study the external exposure risk created by the manufacturing of this target and in the last part the behavior of this target in a fast reactor. 66 refs., 28 figs., 25 tabs., 1 append.

AM-37 and ST-36 Are Small Molecule Bombesin Receptor Antagonists.

Science.gov (United States)

Moody, Terry W; Tashakkori, Nicole; Mantey, Samuel A; Moreno, Paola; Ramos-Alvarez, Irene; Leopoldo, Marcello; Jensen, Robert T

2017-01-01

While peptide antagonists for the gastrin-releasing peptide receptor (BB 2 R), neuromedin B receptor (BB 1 R), and bombesin (BB) receptor subtype-3 (BRS-3) exist, there is a need to develop non-peptide small molecule inhibitors for all three BBR. The BB agonist (BA)1 binds with high affinity to the BB 1 R, BB 2 R, and BRS-3. In this communication, small molecule BBR antagonists were evaluated using human lung cancer cells. AM-37 and ST-36 inhibited binding to human BB 1 R, BB 2 R, and BRS-3 with similar affinity ( K i = 1.4-10.8 µM). AM-13 and AM-14 were approximately an order of magnitude less potent than AM-37 and ST-36. The ability of BA1 to elevate cytosolic Ca 2+ in human lung cancer cells transfected with BB 1 R, BB 2 R, and BRS-3 was antagonized by AM-37 and ST-36. BA1 increased tyrosine phosphorylation of the EGFR and ERK in lung cancer cells, which was blocked by AM-37 and ST-36. AM-37 and ST-36 reduced the growth of lung cancer cells that have BBR. The results indicate that AM-37 and ST-36 function as small molecule BB receptor antagonists.

CologneAMS, a dedicated center for accelerator mass spectrometry in Germany

Energy Technology Data Exchange (ETDEWEB)

Dewald, A., E-mail: dewald@ikp.uni-koeln.de [CologneAMS, Institute of Nuclear Physics, University of Cologne (Germany); Heinze, S.; Jolie, J.; Zilges, A. [CologneAMS, Institute of Nuclear Physics, University of Cologne (Germany); Dunai, T.; Rethemeyer, J.; Melles, M.; Staubwasser, M. [Institute of Geology and Mineralogy, University of Cologne (Germany); Kuczewski, B. [Division of Nuclear Chemistry, University of Cologne (Germany); Richter, J. [Institute of Prehistoric Archaeology, University of Cologne (Germany); Radtke, U. [Institute of Geography, University of Cologne, Germany, Rectorate, University of Duisburg-Essen (Germany); Blanckenburg, F. von [GFZ, German Research Centre for Geosciences, Potsdam (Germany); Klein, M. [HVEE, Amersfoort (Netherlands)

2013-01-15

CologneAMS is a new centre for accelerator mass spectrometry (AMS) at University of Cologne. It has been funded by the German Research Foundation (DFG) to improve the experimental conditions especially for those German scientists that apply the AMS technique for their geologic, environmental, nuclear chemical, and nuclear astrophysical research. The new AMS-device has been built by High Voltage Engineering Europe (HVEE) and has been installed in the existing accelerator area of the Institute of Nuclear Physics. The AMS-facility is designed for the spectrometry of {sup 10}Be, {sup 14}C, {sup 26}Al, {sup 36}Cl, {sup 41}Ca, {sup 129}I in and heavy ions up to {sup 236}U and {sup 244}Pu. The central part of the AMS-facility is a 6 MV Tandetron Trade-Mark-Sign accelerator. Downstream of the high energy mass spectrometer an additional switching magnet is used as a further filter element which supplies also additional ports for future extensions of the detector systems. The current status of CologneAMS and the results of the first test measurements will be presented.

¿Programas focalizados? ¿Por qué falta empleo en América Latina?

Directory of Open Access Journals (Sweden)

Carlos Comas

2006-02-01

Full Text Available EN EL MES DE NOVIEMBRE DEL 2004, SE DESARROLLÓ EN LA UNIVERSIDAD Centroamericana (UCA el Congreso Anual de FLACSO-CLACSO-CROP con la participación de renombrados sociólogos de América Latina, quienes debatieron sobre pobreza y migraciones. El evento clausuró con una Mesa Redonda donde se presentaron ponencias sobre pobreza y migraciones. Este trabajo trata de ser una recopilación de lo dicho en esa reunió, más algunas reflexiones acerca de la focalización versus servicios universales; y por qué América Latina ha fracasado en crear empleo.

Study of the electrochemical oxidation of Am with lacunary heteropolyanions and silver nitrate

International Nuclear Information System (INIS)

Chartier, D.

1999-01-01

Electrochemical oxidation of Am(III) with certain lacunary heteropolyanions (LHPA α 2 -P 2 W 17 O 61 10- or αSiW 11 O 39 8- ) and silver nitrate is an efficient way to prepare Am(VI). This document presents bibliographic data and an experimental study of the process. Thus, it has been established that Am(IV) is an intermediate species in the reaction and occurs in 1:1 (Amt IV LHPA) or 1:2 (Am IV (LHAP) 2 ) complexes with the relevant LHPA. These 1:1 complexes of Am(IV) have been identified and isolated in this work whereas 1:2 complexes were known from previous studies. The reactivity of these complexes in oxidation shows that 1:1 complexes of Am(IV) are oxidised much more quickly than 1:2 complexes. Apparent stability constants of Am(III) and Am(IV) complexes with the relevant LHPA have been measured for a 1 M nitric acid medium. Thermodynamic data of the reaction are then assessed: redox potentials of Am pairs are computed for a 1 M nitric acid medium containing various amount of LHPA ligands. Those results show that the role of LHPA is to stabilize the intermediate species Am(IV) by lowering the Am(IV)/Am(III) pair potential of about 1 Volt. Nevertheless, if this stabilisation is too strong (i.e. of tungsto-silicate), the oxidation of Am(IV) requires high anodic potential (more than 2 V/ENH). Then, the faradic yield of the oxidation of americium is poor because of water oxidation. This study has also shown that the main role of silver is to catalyze the electrochemical oxidation of Am IV (LHPA) X complexes. Indeed, these oxidations without silver are extremely slow. An oxygen tracer experiment has been performed during the oxidation of Am(III) in Am(VI). It has been shown that the oxygen atoms of Am(VI) (AMO 2 2+ ) come from water molecules of the solvent and not from the complexing oxygen atoms of the ligands. (author)

Thermoresponsive behaviour of AM2O8 materials

International Nuclear Information System (INIS)

Allen, Simon

2003-01-01

This thesis investigates the synthesis and structural characterisation of AM 2 O 8 phases, many of which show negative thermal expansion (NTE); relevant literature is reviewed in Chapter One. Chapter Two describes the synthesis, structure solution, and mechanistic role of a new family of low-temperature (LT) orthorhombic AM 2 O 8 polymorphs (A IV = Zr, Hf; M VI = Mo, W). These materials are key intermediates in the preparation of cubic AM 2 O 8 phases from AM 2 O 7 (OH) 2 (H 2 O) 2 . The structure of LT-AM 2 O 8 has been elucidated by combined laboratory X-ray and neutron powder diffraction. Variable temperature X-ray diffraction (VTXRD) studies have shown LT-AMo 2 O 8 phases exhibit anisotropic NTE. LT-ZrMo 2 O 8 has been shown to undergo spontaneous rehydration, allowing preparation of ZrMo 2 O 7 (OD) 2 (D 2 O) 2 and assignment of D 2 O/OD positions within the structure by neutron diffraction. Using this result, a reversible topotactic dehydration pathway from AM 2 O 7 (OH) 2 (H 2 O) 2 to LT-AM 2 O 8 is proposed. Chapter Three investigates the order-disorder phase transition with concurrent oxygen mobility in cubic AM 2 O 8 materials; studies include comprehensive VT neutron diffraction of cubic ZrMo 2 O 8 to reveal a static to dynamic transition at 215 K, and novel quench-anneal/quench-warm variable temperature/time diffraction experiments on ZrWMoO 8 which lead to an activation energy of 40 kJmol -1 for oxygen migration. In Chapter Four 17 O-labelled cubic ZrW 2 O 8 has been prepared to understand the oxygen migration process by VT MAS NMR. In situ hydrothermal studies of cubic ZrMo 2 O 8 using synchrotron radiation have shown direct hydration to ZrMo 2 O 7 (OH) 2 (H 2 O) 2 . In Chapter Five VTXRD of trigonal α-AMo 2 O 8 phases reveals a previously unknown second-order phase transition at 487 K (A = Zr) or 463 K (A = Hf) from P3-bar 1c to P3-bar m1. Rigid-body Rietveld refinements have shown this is due to alignment of apical Mo-O groups with the c axis in the

Operational status of the JAEA-MUTSU tandetron AMS 2008-2009

International Nuclear Information System (INIS)

Kabuto, Shoji; Kinoshita, Naoki; Tanaka, Takayuki; Yamamoto, Nobuo

2010-01-01

A Tandetron Accelerator Mass Spectrometer (AMS) manufactured by High Voltage Engineering Europa in Netherlands had been set up at the Mutsu office of Aomori Research and Development Center, Japan Atomic Energy Agency (JAEA) in 1997. This AMS features 3MV Tandetron accelerator and two independence beamlines for 14 C and 129 I measurement. This AMS has measured both internal and external JAEA researcher's samples based on an open door policy since April 2006. Furthermore, the total operation time of this AMS from the routine operation started exceeds more than 20,000 hours in this year. In this report, we describe not only the summary of the current status and troubles from the previous symposium but also the upgrading of the operation system in this AMS which is carried out from June to July in 2009. (author)

Determination of plutonium in urine samples from 24 h by ICP-W.f.'s and AMS

International Nuclear Information System (INIS)

Aragon del Valle, A.; Anton Mateos, M. P.; Chamizo Calvo, E.; Barrado Olmedo, A. I.; Yllera de Llano, A.

2013-01-01

The identification and quantification of alpha emitters in biological samples is essential to estimate the internal dose received by workers exposed. The object of this research is to assess the suitability of AMS and ICP-WSFS as measure alternative techniques to the EA of high resolution in the quantification of plutonium in urine 24h. (Author)

Efeitos do cloreto de amônio, ácido cítrico e cloreto de sódio no controle de cistites em porcas

OpenAIRE

Meister, Ayumi Renata [UNESP

2006-01-01

As infecções urinárias (IU) em porcas estão entre as principais causas de falhas reprodutivas que influem na produtividade do rebanho, proporcionando grandes prejuízos econômicos. No presente trabalho foram testados dois acidificantes urinários - o ácido cítrico e o cloreto de amônio e cloreto de sódio, de modo a comparar a atividade destes produtos, no controle de cistites em matrizes suínas. Utilizaram-se 53 porcas adultas, gestantes ou não, de linhagens comerciais, portadoras ou não de cis...

Regulation of adrenomedullin and nitric oxide production by periodontal bacteria.

Science.gov (United States)

Hussain, Q A; McKay, I J; Gonzales-Marin, C; Allaker, R P

2015-10-01

In periodontitis the host response to bacterial challenge includes activity of the multifunctional molecules adrenomedullin (AM) and nitric oxide (NO). The aim of this study was to investigate the role of periodontal bacteria in regulating the production of these molecules from cultured cells. Regulation of AM and NO production from oral keratinocytes when challenged with culture supernatants from Aggregatibacter actinomycetemcomitans, Campylobacter rectus, Fusobacterium nucleatum, Porphyromonas gingivalis, Prevotella intermedia, Veillonella atypica, Streptococcus salivarius and Candida albicans was examined. AM and NO were measured in cell culture supernatants using an enzyme-linked immunosorbent assay and the nitrate/nitrite (NO metabolites) Griess assay respectively. Cellular production of AM and inducible NO synthase was also analysed in target cells by immunofluorescence and Western blot analysis. The inter-relationship of AM and NO production were further investigated with macrophages. A. actinomycetemcomitans and C. rectus induced maximal levels of both AM and NO after 6 and 48 h respectively from oral keratinocytes. AM production in macrophages was upregulated in response to the NO donor S-nitrosoglutathione and partially blocked by the inducible NO synthase inhibitor, N(ω) -Nitro-l-arginine methyl ester hydrochloride. Likewise, NO production was increased upon exposure to AM, while the AM receptor antagonist AM 22-52 reduced the release of NO. Pathogens associated with aggressive periodontitis, A. actinomycetemcomitans and C. rectus, were more effective than those associated with chronic periodontitis, P. gingivalis and Prev. intermedia, and commensals, S. salivarius and V. atypica, as regards the upregulation of AM and NO production from oral keratinocytes. Interaction between these molecules was also demonstrated with macrophages. Understanding the coordinated regulation of AM and NO production in response to periodontal bacteria may identify

Amélioration de la gouvernance du cyberespace dans les pays du ...

International Development Research Centre (IDRC) Digital Library (Canada)

13 avr. 2018 ... Photo: La banque mondiale Les outils numériques améliorent la capacité des gens à innover, à s'organiser, à documenter et à transmettre en ligne, mais ... À cette fin, le Centre de recherches pour le développement international (CRDI) enquête sur une nouvelle initiative sur les centres de cyberpolitique ...

Améliorer les politiques d'emploi des jeunes en Afrique francophone ...

International Development Research Centre (IDRC) Digital Library (Canada)

Centre de recherches pour le développement international Gouvernement du ... des bureaux de placement afin d'aider les jeunes à intégrer le marché du travail. ... Croissance inclusive : une expression à la mode ou une notion innovante ? ... Miser sur la recherche pour améliorer l'accès à la justice partout dans le monde.

AMS-11 in Rome, 2008: Past achievements, current and future trends

International Nuclear Information System (INIS)

Fink, David

2010-01-01

The volume of scientific work and achievements of the international Accelerator Mass Spectrometry community over the past 30 years is presented by quantifying the annual increases in past AMS conference participation, trends in technical developments and applications, the rate of growth of new AMS facilities, sample throughput, publications and general scientific impact. Also a brief summary with some highlights of the International AMS-11 Rome Conference is presented with some flavour of current trends and future directions in AMS.

América Latina marginada

Directory of Open Access Journals (Sweden)

Tito Drago

2015-01-01

Full Text Available La renovación en los países comunistas atrae la atención, el comercio, las inversiones y la ayuda de Estados Unidos, Japón y Europa Occidental. En una primera etapa, ello incidirá negativamente en las relaciones de ese continente con América Latina, es creciente y está en pleno proceso acelerado, la marginación del comercio exterior de la Comunidad Europea. Las inversiones directas no presentan perspectivas. Asegura que a esto se suma la invasión a Panamá, que fue interpretada como que las potencias llegaron a acuerdos en Malta para el reparto del mundo.Con la perestroika la situación de América Latina desmejoró notablemente.

26Al and 36Cl AMS system at University of Tsukuba: A progress report

International Nuclear Information System (INIS)

Sasa, Kimikazu; Nagashima, Yasuo; Takahashi, Tsutomu; Seki, Riki; Tosaki, Yuki; Sueki, Keisuke; Bessho, Kotaro; Matsumura, Hiroshi; Miura, Taichi; He, Ming

2007-01-01

With the current AMS system on the 12UD Pelletron tandem accelerator at University of Tsukuba, we are able to measure the long-lived radioisotopes of 14 C, 26 Al, 36 Cl and 129 I by employing a molecular pilot beam method that stabilizes the terminal voltage with 0.1% accuracy. Several major improvements have been made to increase the sensitivity of the AMS system to 26 Al and 36 Cl radioisotopes. For 26 Al-AMS, the ions extracted from the ion source have been changed from Al - to AlO - by using an Al 2 O 3 target sample. In addition, 26 MgO - molecular ions are used as a pilot beam to control the terminal voltage through slit current feedback. Also, a fully-stripping AMS technique is used to achieve an effective detection limit of better than 5 x 10 -15 for the 26 Al/ 27 Al ratio. For 36 Cl-AMS, the terminal voltage has been increased from 9 MV to 10 MV, thereby increasing the energy of the 36 Cl 9+ beam to 100 MeV. This energy increment helps us to get a clearer separation between 36 Cl and 36 S in a new ΔE-E detector. In addition, the yield of 36 Cl 9+ is increased by 1.5 times as a result of the higher ion energy at the terminal stripper foil. The standard deviation of the fluctuations of the 36 Cl/ 35 Cl ratio is within ±2%, and the effective detection limit is better than 2.0 x 10 -14

Design of BOP Systems for the AM600

Energy Technology Data Exchange (ETDEWEB)

Ouma, Victor Otieno; Abdoelatef, M. Gomaa; Na, Hyungjooh; Field, Robert [KEPCO International Nuclear Graduate School, Ulsan (Korea, Republic of)

2015-10-15

Targeted for emergent nuclear countries with smaller grid capacity and/or large seasonal variation in grid frequency, the design is intended to be appropriate as an initial Nuclear Power Plant (NPP) installation. The AM600 shaftline is designed to have low capital and installation cost with robust resistance to torsional vibration and other operational insults. The proposed AM600 design for pumping condensate from the hotwell to the SGFP suction is a horizontal CP/CBP combination. This design avoids many of the problems associated with vertical condensate pumps as outlined above. Further, this design represents a robust, reliable, approach with simplified maintenance and overhauls. Finally, this design has been specified and used by a major U.S. NPP operator at twelve nuclear units with more than 10 million cumulative 'pump set' operating hours with very reliable performance. The specification of a single stage, double hung, double suction barrel pump for the SGFPs avoids design issues associated with horizontal split case pumps and with multiple impeller designs. The use of electronic VFD to drive a variable speed motor simplifies the design, fabrication, and installation of the SGFP driver. Further, it eliminates the need for a 'startup' SGFP and permits use of the SGFPs independent of having a vacuum in the main condenser. The main characteristics of the design specification for the AM600 FWHs is that they consist of a single string. Moreover, four (4) LP FWHs are located in the condenser neck. Modularizing the installation of FWHs can bring significant economies by a reduction in installation work in the field with an associated reduction in erection schedules. However, the design with a single string limits operational flexibility to take a FWH out-of-service to address tube rupture.

Status of AMS at the China Institute of Atomic Energy

International Nuclear Information System (INIS)

Jiang Shan; He Ming; Hu Yueming; Yuan Jian

2007-01-01

The first accelerator mass spectrometry (AMS) system in China was set up at the China Institute of Atomic Energy in 1989. In the following years, long-lived nuclides 10 Be, 26 Al, 36 Cl, 41 Ca, 79 Se and 129 I were measured in geology, environment and biology samples. The newly development of the AMS measurement and applications in recent years were introduced. The current projects include upgrading of AMS injection system for increasing mass resolution, new particle identification techniques for separation of isobars, development of the AMS measurement methods for 99 Tc, 93 Zr, 151 Sm and 182 Hf analyses, and applications in biology, environment and nuclear astrophysics. (authors)

AM-37 and ST-36 Are Small Molecule Bombesin Receptor Antagonists

Directory of Open Access Journals (Sweden)

Terry W. Moody

2017-07-01

Full Text Available While peptide antagonists for the gastrin-releasing peptide receptor (BB2R, neuromedin B receptor (BB1R, and bombesin (BB receptor subtype-3 (BRS-3 exist, there is a need to develop non-peptide small molecule inhibitors for all three BBR. The BB agonist (BA1 binds with high affinity to the BB1R, BB2R, and BRS-3. In this communication, small molecule BBR antagonists were evaluated using human lung cancer cells. AM-37 and ST-36 inhibited binding to human BB1R, BB2R, and BRS-3 with similar affinity (Ki = 1.4–10.8 µM. AM-13 and AM-14 were approximately an order of magnitude less potent than AM-37 and ST-36. The ability of BA1 to elevate cytosolic Ca2+ in human lung cancer cells transfected with BB1R, BB2R, and BRS-3 was antagonized by AM-37 and ST-36. BA1 increased tyrosine phosphorylation of the EGFR and ERK in lung cancer cells, which was blocked by AM-37 and ST-36. AM-37 and ST-36 reduced the growth of lung cancer cells that have BBR. The results indicate that AM-37 and ST-36 function as small molecule BB receptor antagonists.

AM-37 and ST-36 Are Small Molecule Bombesin Receptor Antagonists

Science.gov (United States)

Moody, Terry W.; Tashakkori, Nicole; Mantey, Samuel A.; Moreno, Paola; Ramos-Alvarez, Irene; Leopoldo, Marcello; Jensen, Robert T.

2017-01-01

While peptide antagonists for the gastrin-releasing peptide receptor (BB2R), neuromedin B receptor (BB1R), and bombesin (BB) receptor subtype-3 (BRS-3) exist, there is a need to develop non-peptide small molecule inhibitors for all three BBR. The BB agonist (BA)1 binds with high affinity to the BB1R, BB2R, and BRS-3. In this communication, small molecule BBR antagonists were evaluated using human lung cancer cells. AM-37 and ST-36 inhibited binding to human BB1R, BB2R, and BRS-3 with similar affinity (Ki = 1.4–10.8 µM). AM-13 and AM-14 were approximately an order of magnitude less potent than AM-37 and ST-36. The ability of BA1 to elevate cytosolic Ca2+ in human lung cancer cells transfected with BB1R, BB2R, and BRS-3 was antagonized by AM-37 and ST-36. BA1 increased tyrosine phosphorylation of the EGFR and ERK in lung cancer cells, which was blocked by AM-37 and ST-36. AM-37 and ST-36 reduced the growth of lung cancer cells that have BBR. The results indicate that AM-37 and ST-36 function as small molecule BB receptor antagonists. PMID:28785244

¿Por qué se está quedando atrás América Latina?

OpenAIRE

Paulina Beato; Antonio Vives

2005-01-01

Este documento presenta los obstáculos al desarrollo empresarial que han sido identificados por los actores de la región y el impacto de los mismos sobre el crecimiento y la competitividad utilizando para ello trabajos previamente realizados. Su objetivo es iniciar y promover una discusión ordenada de los obstáculos al desarrollo empresarial en América Latina con el fin de recabar sugerencias de los actores para el diseño e implantación de políticas para aumentar la competitividad y el crecim...

AMS radiocarbon dating of very large Grandidier’s baobabs (Adansonia grandidieri)

Energy Technology Data Exchange (ETDEWEB)

Patrut, Adrian [Babeş-Bolyai University, Faculty of Chemistry, Cluj-Napoca (Romania); Reden, Karl F. von [NOSAMS Facility, Dept. of Geology & Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA (United States); Danthu, Pascal [Cirad, UPR BSEF, Montpellier (France); DP Forêt et Biodiversité, Antananarivo (Madagascar); Leong Pock-Tsy, Jean-Michel [DP Forêt et Biodiversité, Antananarivo (Madagascar); Rakosy, Laszlo; Patrut, Roxana T. [Babeş-Bolyai University, Faculty of Biology and Geology, Cluj-Napoca (Romania); Lowy, Daniel A. [Nova University, Alexandria Campus, Alexandria, VA (United States); Margineanu, Dragos [Babeş-Bolyai University, Faculty of Chemistry, Cluj-Napoca (Romania)

2015-10-15

The article reports the AMS radiocarbon investigation of the two largest known Adansonia grandidieri specimens. The two baobabs, which are named Tsitakakoike and Pregnant baobab, are located in Southwestern Madagascar, near Andombiro. A third specimen from this area, the House baobab, was also investigated. According to measurements, Tsitakakoike is the biggest individual above ground level of all Adansonia species. The House baobab was selected for its exposed structure, which is identical to the closed ring-shaped structure with false cavities identified by us in large and old Adansonia digitata specimens. According to our research, Tsitakakoike and the Pregnant baobab have multi-stemmed cylindrical trunks which are mainly hollow; the two very large baobabs also possess a ring-shaped structure. The radiocarbon dates of the oldest wood samples collected from the large trunks were 1274 ± 20 BP for Tsitakakoike and 930 ± 20 BP for the Pregnant baobab. According to their original positions and to the architectures of the two A. grandidieri, the ages of Tsitakakoike and Pregnant baobab would be between 1300 and 1500 years. Therefore, A. grandidieri becomes the third Adansonia species with individuals that can live over 1000 years, according to accurate dating results.

Les tourismes dans les départements français d'Amérique

Directory of Open Access Journals (Sweden)

Thierry Hartog

1999-06-01

Full Text Available Au sein de l'Amérique intertropicale, la Martinique, la Guadeloupe et la Guyane présentent une très grande variété de situations et de dynamiques touristiques. L'analyse de certains paramètres (origine des flux, durée du séjour, offre d'hébergement permet de dégager une typologie spatiale.

AMS/NRCan Joint Survey Report: Aerial Campaign

International Nuclear Information System (INIS)

Wasiolek, Piotr; Stampahar, Jez; Malchow, Rusty; Stampahar, Tom; Lukens, Mike; Seywerd, Henry; Fortin, Richard; Harvey, Brad; Sinclair, Laurel

2014-01-01

In January 2014 the U.S. Department of Energy (DOE), National Nuclear Security Administration (NNSA) Aerial Measuring System (AMS) and the Natural Resources Canada (NRCan) Nuclear Emergency Response project conducted a series of joint surveys at a number of locations in Nevada including the Nevada National Security Site (NNSS). The goal of this project was to compare the responses of the two agencies' aerial radiation detection systems and data analysis techniques. This test included varied radioactive surface contamination levels and isotopic composition experienced at the NNSS and the differing data processing techniques utilized by the respective teams. Because both teams used the commercial aerial radiation detection systems from Radiation Solutions, Inc., the main focus of the campaign was to investigate the data acquisition techniques, data analysis, and ground-truth verification. The NRCan system consisted of four 4'' x 4'' x 16'' NaI(Tl) scintillator crystals of which two were externally mounted in a modified commercial cargo basket certified for the Eurocopter AS350; the NNSA AMS system consisted of twelve 2'' x 4'' x 16'' NaI(Tl) crystals in externally mounted dedicated pods. For NRCan, the joint survey provided an opportunity to characterize their system's response to extended sources of various fission products at the NNSS. Since both systems play an important role in their respective countries' national framework of radiological emergency response and are subject to multiple mutual cooperation agreements, it was important for each country to obtain more thorough knowledge of how they would employ these important assets and define the roles that they would each play in an actual response.

AMS. A powerful tool for probing nucleosynthesis via long-lived radionuclides

International Nuclear Information System (INIS)

Wallner, A.; Golser, R.; Kutschera, W.; Priller, A.; Steier, P.; Kaeppeler, F.

2005-01-01

The potential of accelerator mass spectrometry (AMS) will be demonstrated on typical radionuclides of interest with half-lives between some years and up to hundred million years. The Vienna Environmental Research Accelerator (VERA) represents a state-of-the-art AMS facility which provides the ability for quantifying nuclides over the whole mass range. At VERA, AMS is used for quantifying long-lived radionuclides within a wide range of applications - from archaeology to astrophysics. Lack of information on cross section data exists for a list of nuclides pointed out by nuclear data requests. The potential of AMS as a powerful tool for probing nucleosynthesis will be demonstrated by means of some prime examples. Recent developments in the technique of AMS will be highlighted and some applications of AMS in astrophysics will be discussed. In addition, an overview on detection limits, measurement precision as well as the recent measurement program at VERA for quantifying such long-lived radionuclides will be presented. (author)

Analysis of Movie I Am Not Stupid 2: Parenting Style 分析《小孩不笨2》电影的父母教育法

Directory of Open Access Journals (Sweden)

Mariana Mariana

2015-04-01

Full Text Available This paper, through Singaporean movie I am not Stupid 2, analyzes the relation between parenting and children’s growth process and also the action of parents should do to offer children for having a good growth process. Research was done based on Baumrind theory about parenting analysis to what kind of parenting that the parents of the movie I am not Stupid 2 offer to their children. Research used literature study to summarize, arrange, and analyze of Diana Baumrind as basis of the research. The results show that Tom and Jerry’s parents or Cheng Cai’s father used authoritarian parenting style. Research suggests that the best parenting style is authoritative parenting because this type of parenting does not only concern about the prominence of rules or regulations in the family, but also the affection of parents towards the children. Therefore, the family will certainly become more harmonious. 

"Nuestra América": José Martí ante la Razón Moderna

Directory of Open Access Journals (Sweden)

Pedro Pablo Rodríguez

2015-09-01

Full Text Available Este artículo es un acercamiento al difícil y singular diálogo con el pensamiento moderno y sus procedimientos del escritor, pensador y político cubano José Martí. La tesis es que el ideario de Martí expresó los intereses y la perspectiva de los pueblos de Hispanoamérica, a la que llamó Nuestra América, por oposición, según escribió “a la otra América, que no es nuestra”. Plenamente consciente de que la identidad de la región se sustentaba en una cultura nueva, mestiza de lo aborigen y lo español, el cubano dedicó su ensayo “Nuestra América” a explicar los factores internos que mantenían las estructuras sociales, políticas y de pensamiento de la época colonial, así como el peligro que representaba el creciente poderío de Estados Unidos.   This article aims to approach Cuban writer, thinker and politician José Martí's harsh, singular dialogue with modern thinking and its procedures. It argues that Martí's set of ideas expressed the interests and viewpoint of the peoples of Hispanic America, which he called Our America, as opposed to, according to his own texts, "the other America, the one that is not ours". Fully conscious of the fact that the region's identity was based on a new culture, resulting from a mix of the indigenous and the Spanish, Martí used his essay "Our America" (originally, "Nuestra América" to explain the internal factors that maintained the colonial social, political and ideological structures, in addition to expressing the threat the growing power of the United States represented.

Treatment of methicillin-resistant Staphylococcus aureus in Latin America Tratamento de Staphylococcus aureus resistente à meticilina na América Latina

Directory of Open Access Journals (Sweden)

Carlos M Luna

2010-12-01

Full Text Available The global spread of methicillin-resistant Staphylococcus aureus (MRSA means it is now a pathogen of worldwide public health concern. Within Latin America, MRSA is highly prevalent, with the proportion of S. aureus isolates that are methicillin-resistant on the rise, yet resources for managing the infection are limited. While several guidelines exist for the treatment of MRSA infections, many are written for the North American or European setting and need adaptation for use in Latin America. In this article, we aim to emphasize the importance of appropriate treatment of MRSA in the healthcare and community settings of Latin America. We present a summary of the available guidelines and antibiotics, and discuss particular considerations for clinicians treating MRSA in Latin AmericaA propagação global de Staphylococcus aureus resistente à meticilina (methicillin-resistant Staphylococcus aureus - MRSA significa que se trata agora de um patógeno de interesse para a saúde pública mundial. Na América Latina, o MRSA é altamente prevalente, com a proporção de S. aureus resistente à meticilina em ascensão, no entanto os recursos para o tratamento da infecção são limitados. Embora existam várias diretrizes para o tratamento de infecções por MRSA, muitas são elaboradas para a América do Norte ou a Europa e precisam ser adaptadas para sua utilização na América Latina. Neste artigo, procuramos destacar a importância do tratamento adequado do MRSA nas unidades de saúde e na comunidade na América Latina. Apresentamos um resumo das diretrizes e dos antibióticos disponíveis, e discutimos considerações específicas para os médicos que tratam de MRSA na América Latina.

IAEA A+M Unit Activities

International Nuclear Information System (INIS)

Braams, B. J.; Chung, H.-K.; Sheikh, K.

2011-01-01

Research on fusion energy devices requires a large amount of data for atomic, molecular and plasma-surface interactions. As current machines are updated and future machines are designed, data for a variety of different materials for a wide range of plasma parameters arise. The Atomic and Molecular (A+M) Data Unit of the International Atomic Energy Agency works to coordinate efforts to establish databases for this fusion research effort. Current activities for database development include a number of Coordinated Research Projects (CRP), Technical Meetings, Consultant Meetings and a number of collaborations. These activities generate significant new data in support of fusion research. These data are published in journals as well as IAEA publications and are included in numerical databases ALADDIN accessible by all fusion researchers. Historically a number of institutions have contributed to development of such databases and continue to participate in a Data Centre Network, supported by the A+M Unit. Members of this network maintain individual databases, many of which can be searched using the GENIE search engine. The A+M Unit host the OPEN-ADAS system that allows access to most of the numerical data stored within the ADAS system. An effort on development of an XML schema for data exchange among the databases is underway. Many numerical data for specific processes in fusion relevant materials are not available. In many cases computer codes exist with the capability of generating such data as needed. An informal network of institutions with such capabilities is in the process of formation to provide a means quickly generating such data. The A+M Unit maintains on-line code capabilities to generate atomic and molecular data and serves as an access point to LANL atomic physics codes and FLYCHK, Non-LTE kinetics codes at NIST. Currently, a wiki-style knowledge base is under the development. It will host a wealth of information on atomic, molecular, plasma-surface data for

Short-period AM CVn systems as optical, X-ray and gravitational-wave sources

NARCIS (Netherlands)

Nelemans, G.; Yungelson, L.; Portegies Zwart, S.F.

2004-01-01

We model the population of AM CVn systems in the Galaxy and discuss the detectability of these systems with optical, X-ray and gravitational-wave detectors. We concentrate on the short-period (P < 1500 s) systems, some of which are expected to be in a phase of direct-impact accretion. Using a

Hantavirus pulmonary syndrome in the Americas El síndrome pulmonar por virus Hanta en las Américas

Directory of Open Access Journals (Sweden)

1998-05-01

Full Text Available La infección por virus Hanta, cuadro nefrótico y hemorrágico documentado desde la antigüedad en países de Asia y Europa, se presenta en las Américas en la época moderna con una nueva cara. Conocida por síndrome pulmonar por virus Hanta, la infección americana se caracteriza por una serie de síntomas respiratorios similares a los de la influenza, con hipotensión grave y disnea progresiva que lleva a la insuficiencia respiratoria y, en 40 a 50% de los casos, a la defunción. Varias cepas virales son las responsables del trastorno y cada cepa tiene por reservorio una especie particular de roedores. El contagio se produce por inhalación de partículas de las materias excretadas por roedores infectados o por contacto con objetos contaminados. Hay datos que podrían indicar la posible transmisión del virus entre seres humanos. Ante la gravedad de este nuevo problema de salud pública, la OPS está intensificando las medidas para la detección y control del síndrome pulmonar por virus Hanta, entre las que figuran el establecimiento de una red de laboratorios encargados de diagnosticar la enfermedad, preparar reactivos para su detección, investigar la ecología del virus causal y mantener una vigilancia de casos activa.

Costo social y desigualdad en América Latina.

OpenAIRE

Villavicencio Rodríguez, Tatiana Jackeline

2016-01-01

La presente tesis busca realizar un acercamiento a la relación entre desigualdad y gasto social en América Latina para el periodo 1990-2013. Primeramente nos proponemos verificar si existe simultaneidad o doble causalidad entre las variables del gasto social y la desigualdad medida a través del índice de Gini. En caso afirmativo se analizará el efecto que las variables de gasto social (educación, salud, seguridad social, vivienda y otros) tienen sobre la desigualdad y el efecto que la desigua...

14C-AMS at the Leibniz-Labor: radiometric dating and isotope research

International Nuclear Information System (INIS)

Grootes, Pieter M.; Nadeau, Marie-Josee; Rieck, Anke

2004-01-01

The Leibniz-Labor was founded to provide radiometric dating services using AMS and measured over 15 000 samples and 26 800 targets up to September 2002. Research and development have primarily been directed at improving the efficiency and reliability of AMS measurements, optimising existing sample preparation procedures for AMS and developing new ones. The standard chemical pre-treatment of organic radiocarbon samples produces often two fractions: one from which contaminants have been removed, and one in which they have been enriched. Dating both fractions reveals the degree of sample contamination. This provides a useful indication of the reliability of the sample age obtained and of the environmental conditions where the sample was taken. Upgrades to reduce maintenance include replacing four cryo- by turbo pumps, installing a deionizer loop, which keeps conductivity between 100 and 150 μS/cm to control corrosion, in the closed cooling water circuit, and developing a new sample wheel, which holds target holders with a groove and spring clip. Long term stability is demonstrated by the results obtained for IAEA reference materials, measured routinely and regularly over the years. Tests made as part of the FIRI project demonstrate that reliable measurements down to <0.1 mg C can be made

La dimensión subjetiva de la política en América Latina

Directory of Open Access Journals (Sweden)

Aristinete Bernardes Oliveira Neto

2009-01-01

Full Text Available El título del trabajo La dimensión subjetiva de la política en América Latina tiene el propósito de despertar a primera vista dos preguntas fundamentales: ¿por qué América Latina? y ¿por qué la subjetividad? Son dos temas que provocan tanto prejuicios como curiosidades en el ámbito académico de la filosofía. La opción por América Latina surgió de una experiencia personal como estudiante de filosofía. Con frecuencia nos sentimos desafortunados al tratar de ajustar los conocimientos adquiridos con las realidades que nos afectan como ciudadanos. La vida académica, sin lugar a dudas, se llena de sentido cuando nos damos cuenta de que es posible llevar al ámbito académico aquellos fantasmas que nos quedan en la mente, abstraídos de las crudas y sanguinarias imágenes de terror que encontramos a lo largo del continente. A través del estudio de la filosofía podemos pensar y soñar en nuevas sociedades humanas. En fin, me decidí por América Latina, porque aquí está mi destino.

El entorno estratégico de América Latina en la Estrategia de Seguridad Nacional 2013

Directory of Open Access Journals (Sweden)

Soledad Segoviano

2014-05-01

Full Text Available Este trabajo analiza América Latina como entorno estratégico, de acuerdo con la Estrategia de Seguridad Nacional: un proyecto compartido, aprobada el 31 de mayo de 2013. Existe un consenso generalizado sobre la importancia de América Latina para España. Sin embargo, lo que debería considerarse como un punto de partida, fundamentado en una historia común, en valores compartidos, en los lazos culturales, económicos, políticos y personales establecidos, se ha llegado a convertir en un fin en sí mismo, haciendo muy difícil identificar y discutir los intereses específicos de seguridad. España tiene importantes intereses estratégicos en América Latina. Estos incluyen los análisis de impacto de las actuales transformaciones globales en el entorno específico de seguridad regional; la emergencia de Brasil como potencia regional y global; la consolidación en el poder de regímenes neo-populistas y autoritarios; la presencia en la región de potencias extrarregionales como China y Rusia; las nuevas modalidades y evolución de las amenazas transnacionales; la seguridad energética, además de los desafíos relacionados con la desigualdad y la violencia estructural. Este trabajo trata de identificar los principales errores de planteamiento estratégico en la aproximación a América Latina.

78 FR 69629 - Revitalization of the AM Radio Service

Science.gov (United States)

2013-11-20

... sizeable portions of their audiences in the evening hours, and still others can provide no protected..., can block AM signals, hindering AM reception in urban areas where such structures are prevalent. Third... license ``should ensure sufficient flexibility in siting facilities and reaching target audiences...

Modelo de cooperación energética entre China y América Latina

OpenAIRE

Hongbo, Sun

2014-01-01

Las relaciones entre China y América Latina han tenido más implicaciones estratégicas en la actual transición de poder político y económico internacional, en particular, sus vínculos energéticos han sido testigos de grandes avances de cooperación entre industrias de petróleo y gas. La cooperación energética de China con América Latina se compone, en una parte nada despreciable, de cambios en curso en energía en el occidente del hemisferio. Las compañías petroleras chinas recurren a diferentes...

Ams Fabric and Deformation of The Jawornik Granitoids In The Zloty Stok - Skrzynka Deformation Zone (sudetes, SW Poland)- Preliminary Interpretations.

Science.gov (United States)

Werner, T.; Bialek, D.

Jawornik granitoids comprise the NE-SW trending sequences of the 1cm up to 1 km thick granitoid veins surrounded by schists and gneisses of the Zloty Stok - Skrzynka deformation zone in Eastern Sudetes (SW Poland). According to conflicting theories granitoids are of magmatic origin or were formed from blastomylonitic rocks that underwent multiphase deformation. AMS studies were performed for the 53 sites lo- calized within granitoid veins and within the surrounding gneisses. AMS foliations for granitoid veins of various thickness as well as for gneisses dip at moderate to steep an- gles to N-NW. AMS lineations in the surrounding gneisses plunge subhorizontally to NE-SW that reflects the regional NE-SW shearing components. Magnetic lineations for sites within wider veins of granitoids plunge at low angles (mostly from S to W) but with more varying trends between sites. Mezoscopic tectonic foliations are record- able only in 50% of sites. They show good correlation with AMS planar fabric on the site scale. The uniformity of AMS fabric on the site scale and high AMS anisotropy within all sites (P of 1.05-1.30, T of 0.3-0.6 on average) suggest syntectonic gener- ation of granitoids. Further interpretations of the AMS and tectonic fabrics will be performed when microtectonic studies and chemical analyses results are available.

Kinematics of the AM-50 heading machine cutting head

Energy Technology Data Exchange (ETDEWEB)

Sikora, W; Bak, K; Klich, R [Politechnika Slaska, Gliwice (Poland). Instytut Mechanizacji Gornictwa

1987-01-01

Analyzes motion of the cutter head of the AM-50 heading machine. Two types of head motion are comparatively evaluated: planar motion and spatial motion. The spatial motion consists of the head rotational motion and horizontal or vertical feed motion, while planar motion consists of rotational motion and vertical feed motion. Equations that describe head motion under conditions of cutter vertical or horizontal feed motion are derived. The angle between the cutting speed direction and working speed direction is defined. On the basis of these formulae variations of cutting speed depending on the cutting tool position on a cutter head are calculated. Calculations made for 2 extreme cutting tools show that the cutting speed ranges from 1,205 m/s to 3,512 m/s. 4 refs.

Oxygen Chemical Diffusion Coefficients of (Pu,Am)O2 Fuels

International Nuclear Information System (INIS)

Watanabe, M.; Kato, M.; Matsumoto, T.

2015-01-01

Minor actinide (MA)-bearing MOX fuels have been developed as candidate fuels which are used in fast neutron spectrum cores such as sodium-cooled fast reactor (SFR) cores and experimental accelerator driven system (ADS) cores. Americium (Am) which is one of the MA elements significantly affects basic properties. It is known that Am content causes oxygen potential to increase and that influences irradiation behaviour such as fuel-cladding chemical interaction (FCCI) and chemical state of fission products. However, the effects of Am content on changes of basic properties are not clear. In this work, the oxygen chemical diffusion coefficients were calculated from measured data and the relationship between oxygen diffusion and oxygen potential of (Pu,Am)O 2-x was discussed. (authors)

Buscando leer la historia mundial desde Nuestra América

Directory of Open Access Journals (Sweden)

Hernán G. H. Taboada

2014-01-01

Full Text Available Existen en América Latina muchos y ya tradicionales reclamos por el abandono del eurocentrismo historiográfico, y en algún grado se han alcanzado resultados en cuanto a los discursos nacionales y regionales se refiere. Sin embargo, seguimos siendo deudores de la vieja historia “universal” originada en Europa, con su exponente clave que es Hegel pero también una difusión capilar en los libros escolares, enciclopedias y toda obra de vulgarización. Esta persistencia se debe a la hegemonía cultural de los grupos criollos en América Latina, que tienen una muy peculiar relación con Europa y su cultura. Su visión histórica, que hemos denominado “eurocriollismo”, sigue predominando mientras en la misma Europa ya ha sido desplazada. Las propuestas para una historia “mundial” policéntrica, que ya tienen varias décadas en otros países, apenas son conocidas en América Latina. El artículo aspira a definir brevemente dicha historia universal eurocriolla, a presentar brevemente las corrientes de la historia mundial, a criticar algunas lecturas supuestamente alternativas desde Nuestra América (Leopoldo Zea, Enrique Dussel y a señalar el camino que falta recorrer. In Latin America, there are now many traditional protests of the abandonment of historiographical eurocentrism which, to some degree, have achieved national and regional discourse. However, we continue to be indebted to the old “universal” history originated in Europe. It’s key proponent is Hegel, but also the capillary diffusion of school books, encyclopedias, and other vulgar works. This persistence is due to a cultural hegemony of Creole groups in Latin America that have a very particular relationship with Europe and its culture. Their historical vision, which we have denominated “eurocriolism,” continues to dominate, while it has been displaced in Europe itself. The proposals for a polycentric world history which now has been in other countries for decades

Unión monetaria, factibilidad para América Latina

Directory of Open Access Journals (Sweden)

Julio César César Valdés

2018-01-01

Full Text Available Como resultado de una serie de eventos y acontecimientos que en el orden económico tuvieron lugar a lo largo de la historia y que incidieron en la conducción política de los países, es que surge el interés de muchos continentes, regiones y países en diseñar una unión monetaria. El objetivo que se plantea para la presente investigación es analizar las condiciones existentes en América Latina para la posible implementación de una unión monetaria, para el desarrollo del objetivo nos apoyamos en el criterio de autores de relevante trayectoria internacional en las áreas de la economía y las finanzas como fueron Bayoumi y Eichengreen (2000, Powell y Sturzenegger (2003, también fueron consultados los premios nobel de economía Joseph Stiglitz (2016 y Robert Mundell (1965,sus significativos contribuciones resultaron de gran aporte para la presente investigación. La metodología empleada fue la realización de un análisis retrospectivo y transversal de la realidad de América Latina para implementar la unión monetaria. Tanto el objetivo planteado como la metodología, unida a otras técnicas de investigación nos permiten plantear como principales resultados, que los países latinoamericanos cuentan con insuficiencia en su capacidad para obtener la cantidad de divisas suficientes para mantener y/o estabilizar sus balanzas de pagos y cerrar sus cuentas internacionales, se plantea que el uso de numerosas monedas crea múltiples dificultades para el intercambio comercial regional. Se concluye como consideraciones finales que América Latinaaún no reúne las condiciones necesarias para que circule una moneda única ya que los modelos económicos de los diferentes países de la región son totalmente divergentes entre sí.

Am/Cm target glass durability dependence on pH (U). Revision 1

International Nuclear Information System (INIS)

Daniel, W.E.; Best, D.R.

1996-03-01

At the Westinghouse Savannah River Company near Aiken, South Carolina, a process is being developed to safely vitrify all of the highly radioactive americium/curium (Am/Cm) material and a portion of the other fissile actinide materials stored on site. One goal of this campaign is to provide Oak Ridge National Laboratory with the excess Am/Cm so it can be recycled as opposed to simply disposing of it as waste. The vitrification will allow safe transportation of the Am/Cm to Oak Ridge as well as safe storage once it arrives. The Am/Cm Target glass being used in this project has been specifically designed to be extremely durable in aqueous environments while it can be selectively attacked by nitric acid to recover the valuable Am and Cm isotopes. Similar glass compositions could be used for storage and retrieval of other actinides on the WSRC site. Previous reports have presented the time, temperature, and compositional dependence of the Am/Cm glass durability. This paper will show results from a pH study on the Am/Cm Target glass durability. The data indicate that the Am/Cm Target Glass durability decreases as pH decreases from a neutral reading. These findings support the extraction of the valuable isotopes from the glass using nitric acid

Mass of decaying wino from AMS-02 2014

Energy Technology Data Exchange (ETDEWEB)

Ibe, Masahiro [Tokyo Univ. (Japan). Inst. for Cosmic Ray Research; Univ. Tokyo (Japan). Kavli Inst. for the Physics and Mathematics of the Universe; Matsumoto, Shigeki; Yanagida, Tsutomu T. [Univ. Tokyo (Japan). Kavli Inst. for the Physics and Mathematics of the Universe; Shirai, Satoshi [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)

2014-09-15

We revisit the decaying wino dark matter scenario in the light of the updated positron fraction, electron and positron fluxes in cosmic ray recently reported by the AMS-02 collaboration. We show the AMS-02 results favor the mass of the wino dark matter at around a few TeV, which is consistent with the prediction on the wino mass in the pure gravity mediation model.

Mass of decaying wino from AMS-02 2014

Energy Technology Data Exchange (ETDEWEB)

Ibe, Masahiro, E-mail: ibe@icrr.u-tokyo.ac.jp [Institute for Cosmic Ray Research (ICRR), Theory Group, University of Tokyo, Kashiwa, Chiba 277-8568 (Japan); Kavli Institute for the Physics and Mathematics of the Universe (IPMU), University of Tokyo, Kashiwa, Chiba 277-8568 (Japan); Matsumoto, Shigeki [Kavli Institute for the Physics and Mathematics of the Universe (IPMU), University of Tokyo, Kashiwa, Chiba 277-8568 (Japan); Shirai, Satoshi [Deutsches Elektronen-Synchrotron (DESY), 22607 Hamburg (Germany); Yanagida, Tsutomu T. [Kavli Institute for the Physics and Mathematics of the Universe (IPMU), University of Tokyo, Kashiwa, Chiba 277-8568 (Japan)

2015-02-04

We revisit the decaying wino dark matter scenario in the light of the updated positron fraction, electron and positron fluxes in cosmic ray recently reported by the AMS-02 collaboration. We show the AMS-02 results favor the mass of the wino dark matter at around a few TeV, which is consistent with the prediction on the wino mass in the pure gravity mediation model.

Mass of decaying wino from AMS-02 2014

International Nuclear Information System (INIS)

Ibe, Masahiro

2014-09-01

We revisit the decaying wino dark matter scenario in the light of the updated positron fraction, electron and positron fluxes in cosmic ray recently reported by the AMS-02 collaboration. We show the AMS-02 results favor the mass of the wino dark matter at around a few TeV, which is consistent with the prediction on the wino mass in the pure gravity mediation model.

AMS_02 Particle Physics Detector Technologies Orbiting the Earth (2/2)

CERN Multimedia

CERN. Geneva

2012-01-01

AMS-02 has taken the high performance technologies used in particle physics and implemented them for use in low Earth orbit. Safety aspects for the Space Shuttle flight, that carried AMS_02 to the International Space Station, Space environment and inaccessibility during the life of AMS_02 are some of the aspects which have driven the design of the experiment. The technical challenges to build such a detector have been surmounted through the close collaboration amongst the AMS scientists and industries around the world. Their efforts have resulted in the development of new technologies and higher standards of precision.

AMS_02 Particle Physics Detector Technologies Orbiting the Earth (1/2)

CERN Multimedia

CERN. Geneva

2012-01-01

AMS-02 has taken the high performance technologies used in particle physics and implemented them for use in low Earth orbit. Safety aspects for the Space Shuttle flight, that carried AMS_02 to the International Space Station, Space environment and inaccessibility during the life of AMS_02 are some of the aspects which have driven the design of the experiment. The technical challenges to build such a detector have been surmounted through the close collaboration amongst the AMS scientists and industries around the world. Their efforts have resulted in the development of new technologies and higher standards of precision.

Experimental verification for standard analysis procedure of 241Am in food

International Nuclear Information System (INIS)

Liu Qingfen; Zhu Hongda; Liu Shutian; Pan Jingshun; Yang Dating

2005-01-01

Objective: The briefly experimental verification for 'determination of 241 Am in food' has been described. Methods: The overall recovery, the MDL of method and decontamination experiment has been done by standard analysis procedure. Results: The overall recovery is 76.26 ± 4.1%. The MDL is 3.4 x 10 -5 Bq/g ash, decontamination factor is higher than 10 3 for Po, 10 2 for U, Th, Pu and 60 for 237 Np. Conclusion: The results showed that the overall recovery is quite high and reliable, the MDL of method is able to meet examining 241 Am limited values in foods. the obtained decontamination factors of recommended procedure can meet analysis of 241 Am in food examination. Venifying results of the procedure are satisfied by using 243 Am spike and 241 Am standard reference material. (authors)

Salud y enfermedad en América Latina

Directory of Open Access Journals (Sweden)

Miguel Malo

2015-01-01

Full Text Available La prolongada crisis económica de los países de la región y las políticas de ajuste macro económico han generado una situación económica y social que produce inequidades profundas. La década de los 90 mostró niveles de deterioro de las condiciones de salud de la mayoría de la población y en su acceso desventajoso a servicios de salud. Al momento son 200 millones de personas, en América Latina, que viven en la pobreza; e decir, 50 millones más que en 1980.

El regreso del determinismo: la fatalidad tropical del subdesarrollo en América Latina

OpenAIRE

Gudynas, Eduardo

2014-01-01

Los más recientes reportes anuales y estudios técnicos del Banco Interamericano de Desarrollo defienden un determinismo geográfico del desarrollo: los países más ricos en recursos naturales y más cercanos al ecuador están condenados a ser más atrasados y pobres. Los problemas actuales no se deben a las reformas estructurales o las acciones de los gobiernos, sino a las condiciones ambientales. Para remontar todos ésto el mejor remedio es el mercado y acentuar todavía más las reformas. América...

On-line I{sup −}/Te{sup −} separation for the AMS analysis of {sup 125}I

Energy Technology Data Exchange (ETDEWEB)

Charles, C.R.J., E-mail: christopher.charles@uottawa.ca [Andre E. Lalonde Accelerator Mass Spectrometry Laboratory, Advanced Research Complex, University of Ottawa, 25 Templeton Street, Ottawa, ON K1N 6N5 (Canada); Cornett, R.J.; Zhao, X.-L. [Andre E. Lalonde Accelerator Mass Spectrometry Laboratory, Advanced Research Complex, University of Ottawa, 25 Templeton Street, Ottawa, ON K1N 6N5 (Canada); Litherland, A.E. [IsoTrace Laboratory, Department of Physics, University of Toronto, 60 St. George Street, Toronto, ON M5S 1A7 (Canada); Kieser, W.E. [Andre E. Lalonde Accelerator Mass Spectrometry Laboratory, Advanced Research Complex, University of Ottawa, 25 Templeton Street, Ottawa, ON K1N 6N5 (Canada)

2015-10-15

The isobar separator for anions (ISA) was used together with a 3 MV tandem accelerator mass spectrometer (AMS) to demonstrate the real time (on-line) separation of Te{sup −} from I{sup −}. Following the ion source mass spectrometry and major retardation to tens of eV, the ISA uses a radiofrequency quadrupole (RFQ) ion guide to confine and direct I{sup −} and associated Te{sup −} isobar anions through a gas-reaction cell, where chemical reactions occur at eV energies with the electronegative gas NO{sub 2}. Anions are subsequently reaccelerated out of the ISA to near original ion source extraction energies for AMS analysis. At 5 mTorr NO{sub 2} in the ISA gas-reaction cell, {sup 125}Te{sup −} was observed to be attenuated by a factor of ∼10{sup 7} as compared to {sup 127}I{sup −} that did not experience significant (<50%) losses. A comparative test using {sup 37}Cl{sup −} and {sup 32}S{sup −} (having similar chemical properties to iodine and tellurium) showed a {sup 32}S{sup −} attenuation of >10{sup 7} relative to {sup 37}Cl{sup −} under the same ISA–AMS conditions. The preferential destruction of Te{sup −} (and S{sup −}) at eV energies in the ISA is likely due to a larger favorable destruction cross-section with NO{sub 2}. This study is the first demonstration of I–Te anion separation for AMS, and makes possible the use of {sup 125}I, free of the contaminant {sup 125}Te isobar after suitable sample purification, for future {sup 129}I/{sup 125}I carrier-free analyses of natural samples at ultra-low trace levels.

THE CANNABINOID RECEPTOR ANTAGONIST AM251 INCREASES PARAOXON AND CHLORPYRIFOS OXON TOXICITY IN RATS

Science.gov (United States)

Liu, Jing; Pope, Carey

2014-01-01

Organophosphorus anticholinesterases (OPs) elicit acute toxicity by inhibiting acetylcholinesterase (AChE), leading to acetylcholine accumulation and overstimulation of cholinergic receptors. Endocannabinoids (eCBs, e.g., arachidonoyl ethanolamide [AEA] and 2-arachidonoyl glycerol [2-AG]) are neuromodulators that regulate neurotransmission by reducing neurotransmitter release. The eCBs are degraded by the enzymes fatty acid amide hydrolase (FAAH, primarily involved in hydrolysis of AEA) and monoacylglycerol lipase (MAGL, primarily responsible for metabolism of 2-AG). We previously reported that the cannabinoid receptor agonist WIN 55,212-2 reduced cholinergic toxicity after paraoxon exposure. This study compared the effects of the cannabinoid receptor antagonist AM251 on acute toxicity following either paraoxon (PO) or chlorpyrifos oxon (CPO). CPO was more potent in vitro than PO at inhibiting AChE (≈ 2 fold), FAAH (≈ 8 fold), and MAGL (≈ 19 fold). Rats were treated with vehicle, PO (0.3 and 0.6 mg/kg, sc.) or CPO (6 and 12 mg/kg, sc.) and subsets treated with AM251 (3 mg/kg, ip; 30 min after OP). Signs of toxicity were recorded for four hours and rats were then sacrificed. OP-treated rats showed dose-related involuntary movements, with AM251 increasing signs of toxicity with the lower dosages. PO and CPO elicited excessive secretions, but AM251 had no apparent effect with either OP. Lethality was increased by AM251 with the higher dosage of PO, but no lethality was noted with either dosage of CPO, with or without AM251. Both OPs caused extensive inhibition of hippocampal AChE and FAAH (>80–90%), but only CPO inhibited MAGL (37–50%). These results provide further evidence that eCB signaling can influence acute OP toxicity. The selective in vivo inhibition of MAGL by CPO may be important in the differential lethality noted between PO and CPO with AM251 co-administration. PMID:25447325

Sécurité hydrique et changements climatiques en Amérique centrale ...

International Development Research Centre (IDRC) Digital Library (Canada)

Il ressort d'études récentes que les pénuries d'eau en Amérique centrale et dans les Caraïbes seront aggravées par la croissance urbaine, les taux de pauvreté élevés, la faiblesse des institutions et l'insuffisance des investissements dans les infrastructures hydrauliques et sanitaires. On prévoit également que des ...

Réseaux d'information et inclusion sociale en Amérique latine ...

International Development Research Centre (IDRC) Digital Library (Canada)

L'évolution rapide des réseaux d'information en Amérique latine pourrait offrir de nouvelles occasions d'aplanir les inégalités dans la région. Ce projet produira des recherches de grande qualité qui viendront éclairer les responsables des politiques et les praticiens au sujet des répercussions qu'ont sur le développement ...

Aerial Measuring System (AMS)/ Israel Atomic Energy Commission (IAEC) Joint Comparison Study

International Nuclear Information System (INIS)

Halevy, I.; Dadon, S.; Sheinfeld, M.; Broide, A.; Rofe, S.; Yaar, I.; Wasiolek, P.

2014-01-01

In support of the U.S. Department of Energy (DOE) International Emergency Management and Cooperation (IEMC/NA-46) Program, the comparison of the U.S. and Israeli Aerial Measuring Systems (AMS) study was proposed and accepted. The study, organized by the DOE/National Nuclear Security Administration (NNSA) Remote Sensing Laboratory (RSL), involved the DOE/NNSA Aerial Measuring System Project based at the RSL and operated under a contractor agreement by National Security Technologies, LLC (NSTec), and the Israel Atomic Energy Commission (IAEC) Aerial Measuring System. The operational comparison was conducted at RSL-Nellis in Las Vegas, Nevada, during week of June 24–27, 2013. The Israeli system, Air RAM 2000 (figure 1, down), was shipped to RSL-Nellis and mounted together with the DOE Spectral Advanced Radiological Computer System, Model A (SPARCS-A, figure 1 up) on U.S. DOE Bell-412 helicopter for a series of aerial comparison measurements at local test ranges, including the Desert Rock Airport and Area 3 at the Nevada National Security Site (NNSS). A four-person Israeli team from the IAEC, Nuclear Research Center – Negev (NRCN) supported the activity. The main objective of this joint comparison was use the DOE/RSL Bell-412 helicopter aerial platform, perform the comparison study of measuring techniques and radiation acquisition systems utilized for emergency response by IEAC and NNSA AMS

L'amélioration du milieu urbain et la réinstallation sont des moyens ...

International Development Research Centre (IDRC) Digital Library (Canada)

18 févr. 2015 ... Quelle est l'efficacité des efforts déployés en Afrique du Sud pour améliorer ses centres urbains, modifier ses environnements urbains et espaces publics, donner des services aux victimes de violence et faire participer directement les collectivités touchées par la violence aux mesures de réduction de la ...

Alpha spectrum analysis of 241Am in the urine

International Nuclear Information System (INIS)

Qiu Yongmei; Yang Yong

2006-10-01

With 241 Am as indicator, americium in the urine was concentrated by the method of codeposition, then it was purified by the method of anion exchange, at last, the americium was electroplated. 241 Am in the urine was analysed by six channel low level alpha measuring instrument and Alpha Spectrometer. The results show that the recovering ratio is beyond 60% under the condition that the indicator added to the urine is at the level of mBq. So, 241 Am in the urine can be quantitatively analysed by this method, uncertainty of the result is under 40%, detection limit of the instrument is under 10 -4 Bq. (authors)

Amélioration de la qualité des soins de santé maternelle pour les ...

International Development Research Centre (IDRC) Digital Library (Canada)

L'Amérique latine est le siège des plus grandes inégalités dans le monde, notamment sur le plan de l'accès à des services de santé de qualité. Compte tenu de facteurs tels que l'isolement géographique, l'accès limité à l'eau potable, à l'assainissement et à la nourriture, ainsi qu'une mauvaise compréhension des ...

Hiroshima - Monday August 6, 1945, 8h15 a.m

International Nuclear Information System (INIS)

Hersey, John; Belmont, Georges; Haas, Pascale

2011-01-01

On 6 August 1945 at 8.15 a.m., Hiroshima was destroyed by the first atom bomb ever dropped on a city, killing one hundred thousand men, women and children in its white fury. This book, John Hersey's journalistic masterpiece, tells what happened on that day. Told through the memories of six civilians who survived against the odds, this timeless, powerful and compassionate document tells the moments that have preceded and followed the atomic explosion. John Hersey's spare, devastating report on the attack was first published in the New Yorker in 1946. Written in the immediate aftermath of the disaster, it is a classic piece of journalism, and a defining moment of the nuclear age

Is 8:30 a.m. Still Too Early to Start School? A 10:00 a.m. School Start Time Improves Health and Performance of Students Aged 13–16

Directory of Open Access Journals (Sweden)

Paul Kelley

2017-12-01

Full Text Available While many studies have shown the benefits of later school starts, including better student attendance, higher test scores, and improved sleep duration, few have used starting times later than 9:00 a.m. Here we report on the implementation and impact of a 10 a.m. school start time for 13 to 16-year-old students. A 4-year observational study using a before-after-before (A-B-A design was carried out in an English state-funded high school. School start times were changed from 8:50 a.m. in study year 0, to 10 a.m. in years 1–2, and then back to 8:50 a.m. in year 3. Measures of student health (absence due to illness and academic performance (national examination results were used for all students. Implementing a 10 a.m. start saw a decrease in student illness after 2 years of over 50% (p < 0.0005 and effect size: Cohen's d = 1.07, and reverting to an 8:50 a.m. start reversed this improvement, leading to an increase of 30% in student illness (p < 0.0005 and Cohen's d = 0.47. The 10:00 a.m. start was associated with a 12% increase in the value-added number of students making good academic progress (in standard national examinations that was significant (<0.0005 and equivalent to 20% of the national benchmark. These results show that changing to a 10:00 a.m. high school start time can greatly reduce illness and improve academic performance. Implementing school start times later than 8:30 a.m., which may address the circadian delay in adolescents' sleep rhythms more effectively for evening chronotypes, appears to have few costs and substantial benefits.

Gisela Cramer y Ursula Prutsch, editoras. ¡Américas unidas! Nelson A. Rockefeller’s Office of Inter-American Affairs (1940-46

Directory of Open Access Journals (Sweden)

David Andrew Corcoran

2013-07-01

Full Text Available Un tema muy poco conocido y con poca frecuencia estudiado es la constitución de la Oficina de Asuntos Interamericanos (OIAA, en inglés, que orquesto una reestructuración de las relaciones entre Estados Unidos y América Latina durante de la Segunda Guerra Mundial. Abandonando de esta manera los limites de la diplomacia tradicional (gobierno a gobierno, los programas OIAA pusieron al gobierno de EE.UU. y a sus ciudadanos por primera vez en contacto directo con sectores amplios del pueblo latinoamericano. Bajo la dirección del joven Nelson Rockefeller y con la clara intención de frenar la influencia del poder nazi y del eje en la región, la OIAA dio sustento a la política del buen vecino.

Electrochemical oxidation of 243Am(III) in nitric acid by a terpyridyl-derivatized electrode

Energy Technology Data Exchange (ETDEWEB)

Dares, C. J.; Lapides, A. M.; Mincher, B. J.; Meyer, T. J.

2015-11-05

A high surface area, tin-doped indium oxide electrode surface-derivatized with a terpyridine ligand has been applied to the oxidation of trivalent americium to Am(V) and Am(VI) in nitric acid. Potentials as low as 1.8 V vs. the saturated calomel electrode are used, 0.7 V lower than the 2.6 V potential for one-electron oxidation of Am(III) to Am(IV) in 1 M acid. This simple electrochemical procedure provides, for the first time, a method for accessing the higher oxidation states of Am in non-complexing media for developing the coordination chemistries of Am(V) and Am(VI) and, more importantly, for separation of americium from nuclear waste streams.

Tatuagem extensa por amálgama em mucosa gêngivo-alveolar Extensive amalgam tattoo on the alveolar-gingival mucosa

Directory of Open Access Journals (Sweden)

Vivian C Galletta

2011-10-01

Full Text Available Tatuagens por amálgama são lesões pigmentadas, exógenas, de frequente ocorrência na mucosa bucal, que resultam da introdução acidental de partículas de amálgama nos tecidos moles. O diagnóstico da tatuagem por amálgama é simples, geralmente, baseado em achados clínicos, complementado pela história recente ou pregressa de remoção de restauração por amálgama. Radiografias intraorais podem ser úteis na detecção de radiopacidade, associadas à partícula de amálgama. Nos casos em que as tatuagens por amálgama não permitem diferenciação de outras lesões melanocíticas, o exame histopatológico deve ser realizado. Os autores relatam à ocorrência de lesão extensa por tatuagem de amálgama com confirmação histopatológica.Amalgam tattoos are common exogenous pigmented lesions of the oral mucosa occurring mainly by inadvertent placement of amalgam particles into soft tissues. The diagnosis of amalgam tattoo is simple, usually based on clinical findings associated with presence or history of amalgam fillings removal. Intraoral X-rays may be helpful in detecting amalgam-related radiopacity. In cases where amalgam tattoo cannot be differentiated from other causes of oral pigmentation, a biopsy should be performed. This article deals with an extensive amalgam tattoo lesion which required a biopsy for a definitive diagnosis.

General concept and present status of the AMS - project

International Nuclear Information System (INIS)

Stan-Sion, C.; Plostinaru, D.; Catana, L.; Radulescu, M.; Marinescu, L.; Dima, R.

1998-01-01

The Institute of Nuclear Physics and Engineering, IFIN-HH, Bucharest started in 1996 the Construction Project for an AMS facility in Bucharest. The Project is supported by the German-Romanian scientific cooperation project RUM-013-97. In the frame of this project, scientific research, construction activities of electronic and mechanical devices and activities for calibration and optimization were performed. The activities in this year are concentrated on experimental tests and optimization of the AMS analysis procedure and on improving the tandem acceleration and transmission capability. These are as follows: - construction and tests of a high current sputter source, with spherical ionizer and automatic many-sample changer. Experimental tests and measurements of emittance and beam profile; - construction of the Injector Platform; - construction and tests of a Bragg - charged particle detector; - calibration and optimization experiments of the AMS ensemble. The AMS facility is based on the 8 MV - FN tandem accelerator and has the following main components: the AMS ion injector, a Wien - velocity filter, a 60 angle bending magnet and the particle detection system. For heavy particle detection we constructed a Bragg ionization chamber. This should be used for standard AMS measurements. A specific part of the AMS facility represents the AMS injector deck. The main components are: the high current sputter source, the analyzing double focusing magnet, two optical systems, a four-slit beam defining system in front of the analyzing magnet and a four-slit aperture with remote controlled Faraday cup (for beam current integration of stable isotopes) after the magnet. Finally, the pre-acceleration tube (40 kV) connects the ensemble to the ground potential of the accelerator beam line. For AMS measurements, the sputter ion source is able to provide both high beam current and small beam emittance. These characteristics are necessary in order to achieve high analyzing

Production Management System for AMS Computing Centres

Science.gov (United States)

Choutko, V.; Demakov, O.; Egorov, A.; Eline, A.; Shan, B. S.; Shi, R.

2017-10-01

The Alpha Magnetic Spectrometer [1] (AMS) has collected over 95 billion cosmic ray events since it was installed on the International Space Station (ISS) on May 19, 2011. To cope with enormous flux of events, AMS uses 12 computing centers in Europe, Asia and North America, which have different hardware and software configurations. The centers are participating in data reconstruction, Monte-Carlo (MC) simulation [2]/Data and MC production/as well as in physics analysis. Data production management system has been developed to facilitate data and MC production tasks in AMS computing centers, including job acquiring, submitting, monitoring, transferring, and accounting. It was designed to be modularized, light-weighted, and easy-to-be-deployed. The system is based on Deterministic Finite Automaton [3] model, and implemented by script languages, Python and Perl, and the built-in sqlite3 database on Linux operating systems. Different batch management systems, file system storage, and transferring protocols are supported. The details of the integration with Open Science Grid are presented as well.

Linear thermal expansion, thermal diffusivity and melting temperature of Am-MOX and Np-MOX

International Nuclear Information System (INIS)

Prieur, D.; Belin, R.C.; Manara, D.; Staicu, D.; Richaud, J.-C.; Vigier, J.-F.; Scheinost, A.C.; Somers, J.; Martin, P.

2015-01-01

Highlights: • The thermal properties of Np- and Am-MOX solid solutions were investigated. • Np- and Am-MOX solid solutions exhibit the same linear thermal expansion. • The thermal conductivity of Am-MOX is about 10% higher than that of Np-MOX. • The melting temperatures of Np-MOX and Am-MOX are 3020 ± 30 K and 3005 ± 30 K, respectively. - Abstract: The thermal properties of Np- and Am-MOX solid solution materials were investigated. Their linear thermal expansion, determined using high temperature X-ray diffraction from room temperature to 1973 K showed no significant difference between the Np and the Am doped MOX. The thermal conductivity of the Am-MOX is about 10% higher than that of Np-MOX. The melting temperatures of Np-MOX and Am-MOX, measured using a laser heating self crucible arrangement were 3020 ± 30 K and 3005 ± 30 K, respectively

Un círculo de deseo: los romances nacional nacionales en América Latina

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Doris Sommer

2006-01-01

Full Text Available La autora muestra las diversas complicidades que se tejen entre el género literario novelístico, el nacionalismo y los procesos de construcción nacional en los países de América Latina. ¿Por qué las novelas nacionales y promovidas por el Estado para nacionalizar sus heterogéneas poblaciones suelen versar sobre el amor romántico? A través de un análisis innovador, basado en la obra de Foucault, la teoría feminista, el psicoanálisis y la nueva narratología, este artículo muestra el nacimiento de una suerte de erótica de la política nacional en América Latina. Sommer muestra la utilidad de su marco teórico para estudiar no solo a los clásicos del siglo XIX de la literatura latinoamericana, sino asimismo a los más recientes autores del boom

[Experimental investigations of 211Am accumulation by macrophytes of the Yenisei River].

Science.gov (United States)

Bolsunovskiĭ, A Ia; Zotina, T A

2002-01-01

Experiments were carried out in which 241Am was added to water samples containing macrophytes of the Yenisei River, and the radionuclide absorption rates and concentration factors were determined for the plants. It has been shown that the water moss (Fontinalis antipyretica) has a higher capacity to accumulate 241Am than the Canadian pondweed (Elodea canadensis) does. The laboratory experiments revealed that the capacity of dead biomass of the Canadian pondweed to accumulate 241Am is twice higher than that of living biomass. In contrast, no significant increase in 241Am accumulation by dead biomass of the water moss has been recorded. The transuranic element 241Am was firmly fixed by the plant biomass and was not released into water in the course of long-duration experiments.

Artificial Muscle (AM) Cilia Array for Underwater Systems

Science.gov (United States)

2016-12-15

shaped AM structures. The AM manufacturing process first starts with a solid model of a soft active structure, which can be created in a computer...material to manufacture the fused filament soft polymer structure, layer by layer. Finally, the manufactured component is then chemically "activated" and...Polymer Metal-Composites for Soft Robotic Applications, 30 printing Workshop, Las Vegas, Nevada, April 15, 2016 2. J. 0. Carrico, J. Erickson, K. K

M.S. CHID AM BAR AM^.

African Journals Online (AJOL)

diphenoxylate hydrochloride (Table 1). Effect of Hydrocotyle javanica on. Gastrointestinal Motility. The methanolic extract also showed a significant reduction in propulsion of charcoal meal through the gastrointestional tract as compared to the vehicle treated group. The results of the present study revealed that Hydrocotyle ...

XAS signatures of Am(III) adsorbed onto magnetite and maghemite

DEFF Research Database (Denmark)

Finck, N.; Radulescu, L.; Schild, D.

2016-01-01

Trivalent americium was adsorbed on magnetite and maghemite under similar chemical conditions and the local environment probed by EXAFS spectroscopy. In both samples, partially hydrated Am(III) binds the surface but slightly different surface complexes were identified. On Fe3O4, Am(III) forms...... monomeric tridentate surface complexes similar to that reported for Pu(III) at the (111) surface. In contrast, the lower number of detected Fe atoms may suggest that Am(III) forms monomeric bidentate surface complexes on γ-Fe2O3. Alternatively, the lower Fe coordination number can also be due...

Consolidación de los archipiélagos de seguridad en América Latina

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Nelson Arteaga Botello

2010-01-01

Full Text Available El incremento de los delitos de diverso tipo y de la violencia criminal en los últimos diez años en América Latina ha propiciado la extensión de los mecanismos de seguridad en las sociedades de la región. De esta forma, no sorprende que a finales del siglo pasado se haya observado un aumento en la demanda de los servicios públicos y privados de seguridad. Este proceso no es solamente el resultado de la exportación hacia América Latina de cierta lógica de seguridad establecida por los Estados Unidos luego de los atentados a las Torres Gemelas. Más bien, este evento vino a acelerar y reforzar un proceso que en gran parte de los países de América Latina ya se venía consolidando; proceso determinado por la implementación de dispositivos de control sobre aquellos sectores que, se piensa, son responsables de la violencia delictiva: los excluidos y marginados de los espacios urbanos de las grandes ciudades latinoamericanas.

The use of isotopic correlation technique for determination of sup(241)Am and sup(243)Am concentration in nuclear irradiated fuels

International Nuclear Information System (INIS)

Souza Sarkis, J.E. de.

1990-01-01

In the last years the isotopic correlation technique is emerging as a powerful tool for the determination of concentration and isotopic composition of heavy nuclides in the nuclear fuel cycle. Accordingly, this technique has gained significant importance for the safeguard of the nuclear materials as well as for the accounting and build up of actinides elements in the irradiated nuclear fuels. In this work 42 isotopic correlations between the nuclides sup(241)Am and sup(243)Am and post irradiation isotopic data of 7 samples from fuel element BE-124 and 1 sample from fuel element BE-120 from the Obrigheim pressurized water nuclear power reactor, Federal Republic of Germany, were proposed. These isotopic correlations allowed to estimate the isotopic concentrations of sup(241)Am and sup(243)Am with an average deviation, relative to the experimental data obtained from isotopic dilution mass spectrometry technique, of 10%. These results are more precise than those found using the computer code ORIGEN 2 demonstrating the great potential of this technique for the determination of isotopic concentration and build up of those nuclides in irradiated nuclear fuels. The analytical and other experimental aspects of the post irradiation isotopic analysis of nuclear fuels are also discussed. (author)

An investigation on the microstructure of an AM50 magnesium alloy

International Nuclear Information System (INIS)

Wang, R.M.; Eliezer, A.; Gutman, E.M.

2003-01-01

The microstructure and the dislocation arrangement in the die cast AM50 magnesium alloy as well as in the stressed states have been investigated using conventional transmission electron microscopy (TEM), high-resolution TEM and energy dispersive X-ray analysis. The microstructure of the die cast AM50 alloy is found to mainly consist of α-Mg, β-Mg 17 Al 12 and Al 8 Mn 5 phases. Two kinds of β-Mg 17 Al 12 particles with different sizes have been found in the stressed AM50 magnesium alloy. Besides the normal β-Mg 17 Al 12 particles with size around several micrometers as in the die-cast AM50 magnesium alloy, some finer β-Mg 17 Al 12 particles in the stressed states of the AM50 alloy have also been found. The finer β-Mg 17 Al 12 particles are found to be only about tens of nanometers with oval or rod-like morphology, which may be formed during deformation. Dislocation pile-ups have been found in the stressed AM50 alloy for the first time. The spacing between each parallel dislocation in the pile-ups is only several nanometers. The dislocations are confined in the slip planes and piled up against grain boundaries. Dislocations in the networks are found to increase with deformation of the alloy. Also, dislocation networks have been found in the β-Mg 17 Al 12 and Al 8 Mn 5 phases as well as in the matrix in the deformed AM50 magnesium alloy. However, the dislocation pile-ups are found to be almost identical from 1.3% deformation to rupture, which explains the stable tensile yield strength of the AM50 magnesium alloy during the deformation

Les voies de l’américanisation: espace américain et écriture de l’histoire au XVIe siècle

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Serge Gruzinski

2012-01-01

Full Text Available Si depuis la Renaissance l’écriture de l’histoire s’est développée sous diverses modalités dans la chrétienté latine, elle s’est métamorphosée en s’installant sur le sol américain. Alors que la discipline européenne est censée adopter ses contours « modernes » dans l’Italie du XVe siècle avec Leonardo Bruni et Flavio Biondo et qu’elle acquiert sa vitesse de croisière dans la première moitié du siècle suivant dans le sillage des Machiavel et des Guichardin, l’histoire que l’on écrit sur le sol américain, depuis le Nouveau Monde, prend une autre tournure: elle s’américanise. Cette nouvelle orientation se révèle indissociable de l’espace maritime et intercontinental dans lequel elle se déploie. Et ce n’est pas qu’une question d’échelle ou de vastitude.A partir de la época del Renacimiento, la escritura de la historia se desarrolló según varias modalidades en la cristiandad latina, sin embargo hablaremos de metamorfosis tratándose de la historia que se redactó en el suelo americano. Se suele afirmar que la disciplina en Europa adopta su forma moderna en la Italia del siglo XV con Leonardo Bruni y Flavio Biondo y adquiere su madurez en la primera mitad del siglo XVI con Maquiavelo y Guicciardini ; en cambio la historia que se escribe desde el Nuevo Mundo cobra otro cariz : se americaniza. Esta nueva orientación resulta indisociable del espacio marítimo e intercontinental en el que se formula. Y no solo es un asunto de escala ni de amplitud espacial.

L'eau du robinet, source d'amélioration de la situation ...

International Development Research Centre (IDRC) Digital Library (Canada)

Les gens ne craignent pas de manquer d'eau, et la plupart des familles ont acheté une machine à laver, dit-elle. Les femmes ont plus de temps pour des activités comme la culture de champignons et d'arbres fruitiers et l'élevage de cochons. Elles ont ainsi augmenté leurs revenus, précise-t-elle. L'amélioration de la ...

Biological effects of α-radiation exposure by 241Am in Arabidopsis thaliana seedlings are determined both by dose rate and 241Am distribution

International Nuclear Information System (INIS)

Biermans, Geert; Horemans, Nele; Vanhoudt, Nathalie; Vandenhove, Hildegarde; Saenen, Eline; Van Hees, May; Wannijn, Jean; Vangronsveld, Jaco; Cuypers, Ann

2015-01-01

Human activity has led to an increasing amount of radionuclides in the environment and subsequently to an increased risk of exposure of the biosphere to ionising radiation. Due to their high linear energy transfer, α-emitters form a threat to biota when absorbed or integrated in living tissue. Among these, 241 Am is of major concern due to high affinity for organic matter and high specific activity. This study examines the dose-dependent biological effects of α-radiation delivered by 241 Am at the morphological, physiological and molecular level in 14-day old seedlings of Arabidopsis thaliana after hydroponic exposure for 4 or 7 days. Our results show that 241 Am has high transfer to the roots but low translocation to the shoots. In the roots, we observed a transcriptional response of reactive oxygen species scavenging and DNA repair pathways. At the physiological and morphological level this resulted in a response which evolved from redox balance control and stable biomass at low dose rates to growth reduction, reduced transfer and redox balance decline at higher dose rates. This situation was also reflected in the shoots where, despite the absence of a transcriptional response, the control of photosynthesis performance and redox balance declined with increasing dose rate. The data further suggest that the effects in both organs were initiated in the roots, where the highest dose rates occurred, ultimately affecting photosynthesis performance and carbon assimilation. Though further detailed study of nutrient balance and 241 Am localisation is necessary, it is clear that radionuclide uptake and distribution is a major parameter in the global exposure effects on plant performance and health. - Highlights: • Arabidopsis thaliana was exposed hydroponically to a range of 241 Am concentrations. • Effects at molecular, morphological and physiological level were observed. • Effects were dependent on both dose rate and 241 Am distribution.

The Induction Effect of Am80 and TSA on ESC Differentiation via Regulation of Stra8 in Chicken.

Science.gov (United States)

Zhang, Yani; Zuo, Qisheng; Liu, Zhiyong; Li, Dong; Tang, Beibei; Xiao, Tian-Rong; Lian, Chao; Wang, Yingjie; Jin, Kai; Wang, Yilin; Zhang, Wenhui; Li, Bichun

2015-01-01

Stra8 encodes stimulated by retinoic acid gene 8, a protein that is important for initiation of meiosis in mammals and birds. This study was aimed at identifying the active control area of chicken STRA8 gene core promoter, to screen optimum inducers of the STRA8 gene, thus to enhance the differentiation of embryonic stem cells (ESCs) into spermatogonial stem cells. Fragments of chicken STRA8 gene promoter were cloned into fluorescent reporter plasmids and transfected into DF-1 cells. Then Dual-Luciferase® Reporter Assay System was used to identify the activity of the STRA8 gene under different inducers. Our studies showed that the promoter fragment -1055 bp to +54 bp of Suqin chicken Stra8 revealed the strongest activity. The dual-luciferase® reporter showed that Tamibarotene (Am80) and TrichostatinA (TSA) could significantly enhance STRA8 transcription. The in vitro inductive culture of chicken ESCs demonstrated that spermatogonial stem cells (SSC)-like cells appeared and Integrinβ1 protein was expressed on day 10, indicating that Am80 and TSA can promote ESCs differentiation into SSCs via regulation of Stra8.

Earth and environmental sciences by accelerator mass spectrometry (AMS) with the large tandem accelerator

International Nuclear Information System (INIS)

Sasa, K.; Takahashi, T.; Sueki, K.

2008-01-01

A multi-nuclide AMS system on the 12UD Pelletron tandem accelerator at the University of Tsukuba (Tsukuba AMS system) has been able to measure environmental levels of long lived radioisotopes of 14 C, 26 Al, 36 Cl and 129 I by employing a molecular pilot beam method. In addition, we have been developing 32 Si and 41 Ca AMS systems for future research programs. Recently, the performance of 36 Cl AMS was improved in AMS technique. The standard deviation is within ±2%, and the background is better than 5 x 10 -15 for the 36 Cl/Cl ratio. At present, our Tsukuba AMS research group has focused its activities especially on the measurement of 36 Cl. We have measured more than 500 samples in year including earth and environmental sciences with the Tsukuba AMS system. A detailed description of the Tsukuba AMS system is given and earth and environmental applications are also described briefly. (author)

Behavior of 241Am in fast reactor systems - a safeguards perspective

International Nuclear Information System (INIS)

Beddingfield, David H.; Lafleur, Adrienne M.

2009-01-01

Advanced fuel-cycle developments around the world currently under development are exploring the possibility of disposing of 241 Am from spent fuel recycle processes by burning this material in fast reactors. For safeguards practitioners, this approach could potentially complicate both fresh- and spent-fuel safeguards measurements. The increased (α,n) production in oxide fuels from the 241 Am increases the uncertainty in coincidence assay of Pu in MOX assemblies and will require additional information to make use of totals-based neutron assay of these assemblies. We have studied the behavior of 241 Am-bearing MOX fuel in the fast reactor system and the effect on neutron and gamma-ray source-terms for safeguards measurements. In this paper, we will present the results of simulations of the behavior of 241 Am in a fast breeder reactor system. Because of the increased use of MOX fuel in thermal reactors and advances in fuel-cycle designs aimed at americium disposal in fast reactors, we have undertaken a brief study of the behavior of americium in these systems to better understand the safeguards impacts of these new approaches. In this paper we will examine the behavior of 241 Am in a variety of nuclear systems to provide insight into the safeguards implications of proposed Am disposition schemes.

The Nuclear Security Science and Policy Institute at Texas A&M University

Directory of Open Access Journals (Sweden)

Claudio A. Gariazzo

2015-07-01

Full Text Available The Nuclear Security Science and Policy Institute (NSSPI is a multidisciplinary organization at Texas A&M University and was the first U.S. academic institution focused on technical graduate education, research, and service related to the safeguarding of nuclear materials and the reduction of nuclear threats. NSSPI employs science, engineering, and policy expertise to: (1 conduct research and development to help detect, prevent, and reverse nuclear and radiological proliferation and guard against nuclear terrorism; (2 educate the next generation of nuclear security and nuclear nonproliferation leaders; (3 analyze the interrelationships between policy and technology in the field of nuclear security; and (4 serve as a public resource for knowledge and skills to reduce nuclear threats. Since 2006, over 31 Doctoral and 73 Master degrees were awarded through NSSPI-sponsored research. Forty-one of those degrees are Master of Science in Nuclear Engineering with a specialization in Nuclear Nonproliferation and 16 were Doctorate of Philosophy degrees with a specific focus on nuclear nonproliferation. Over 200 students from both technical and policy backgrounds have taken classes provided by NSSPI at Texas A&M. The model for creating safeguards and security experts, which has in large part been replicated worldwide, was established at Texas A&M by NSSPI faculty and staff. In addition to conventional classroom lectures, NSSPI faculty have provided practical experiences; advised students on valuable research projects that have contributed substantially to the overall nuclear nonproliferation, safeguards and security arenas; and engaged several similar academic and research institutes around the world in activities and research for the benefit of Texas A&M students. NSSPI has had an enormous impact on the nuclear nonproliferation workforce (across the international community in the past 8 years, and this paper is an attempt to summarize the activities

Las peripecias de Dios en la historia de América: Providencialismo y probabilismo

Directory of Open Access Journals (Sweden)

Alan Martín Pisconte Quispe

2011-05-01

Full Text Available Uno de los mayores problemas que afronta América, específicamente AméricaLatina y con más precisión, el Perú, es la carencia y —hasta ahora—dificultad de plantearse una adecuada definición de sí mismo. En consecuencia,nuestra manera de aproximarnos al mundo y su re-creación discursivapresentan profundos vacíos. Este ensayo pretende mostrar hipótesis plausiblesacerca del porqué de estas dificultades. Una de tales dificultades acechaya desde que planteamos el problema, pues al decir «nuestra manera» ¿quiénse esconde bajo el pronombre posesivo «nosotros»? Como sugería Heidegger,el quien del ser-en -el mundo (la intersubjetividad se haya en un estadoabierto, es decir, ese quien ha construido históricamente un mundo hospitalariose vuelve inhóspito una vez que se presentan dificultades en su periferia yes necesario ya no salvar el «núcleo duro» del paradigma cultural, sino establecersus límites.

Miasis nosocomiales en América Latina y el Caribe: ¿una realidad ignorada?

Directory of Open Access Journals (Sweden)

Rocío Sánchez-Sánchez

Full Text Available Las miasis nosocomiales son infestaciones por larvas de mosca que se producen después de la hospitalización del paciente. Para analizar la información disponible sobre miasis nosocomiales en América Latina y el Caribe, se realizó una búsqueda de casos publicados en los últimos 52 años. Se encontraron nueve casos clínicos en Brasil, Costa Rica, Guayana Francesa, Honduras y Jamaica. También existen dos publicaciones con datos agregados que mencionan 139 casos en El Salvador y alrededor de 32 en Colombia. Los pacientes y el entorno descritos en los casos presentaron condiciones que predisponen a este tipo de infestaciones. Las miasis nosocomiales en América Latina y el Caribe no suelen ser de declaración obligatoria, por lo que es probable que exista un importante subregistro. Es necesario crear conciencia y mejorar el registro de estas miasis en la región para tomar las medidas más adecuadas de prevención, que beneficien el cuidado del paciente durante su hospitalización.

Potential of different AM fungi (native from As-contaminated and uncontaminated soils) for supporting Leucaena leucocephala growth in As-contaminated soil.

Science.gov (United States)

Schneider, Jerusa; Bundschuh, Jochen; Rangel, Wesley de Melo; Guilherme, Luiz Roberto Guimarães

2017-05-01

Arbuscular mycorrhizal (AM) fungi inoculation is considered a potential biotechnological tool for an eco-friendly remediation of hazardous contaminants. However, the mechanisms explaining how AM fungi attenuate the phytotoxicity of metal(oid)s, in particular arsenic (As), are still not fully understood. The influence of As on plant growth and the antioxidant system was studied in Leucaena leucocephala plants inoculated with different isolates of AM fungi and exposed to increasing concentrations of As (0, 35, and 75 mg dm -3 ) in a Typic Quartzipsamment soil. The study was conducted under greenhouse conditions using isolates of AM fungi selected from uncontaminated soils (Acaulospora morrowiae, Rhizophagus clarus, Gigaspora albida; and a mixed inoculum derived from combining these isolates, named AMF Mix) as well as a mix of three isolates from an As-contaminated soil (A. morrowiae, R. clarus, and Paraglomus occultum). After 21 weeks, the activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR) were determined in the shoots in addition to measuring plant height and mineral contents. In general, AM fungi have shown multiple beneficial effects on L. leucocephala growth. Although the activity of most of the stress-related enzymes increased in plants associated with AM fungi, the percentage increase caused by adding As to the soil was even greater for non-mycorrhizal plants when compared to AM-fungi inoculated ones, which highlights the phytoprotective effect provided by the AM symbiosis. The highest P/As ratio observed in AM-fungi plants, compared to non-mycorrhizal ones, can be considered a good indicator that the AM fungi alter the pattern of As(V) uptake from As-contaminated soil. Our results underline the role of AM fungi in increasing the tolerance of L. leucocephala to As stress and emphasize the potential of the symbiosis L. leucocephala-R. clarus for As-phytostabilization at moderately As

Effect of Am-80, A Novel Retinoid Derivative, On Contact Hypersensitivity Caused by Repeated Applications of Hapten in Mice

Directory of Open Access Journals (Sweden)

Satoru Niwa

2000-01-01

Full Text Available Some retinoids show an anti-inflammatory action through regulation of transcription of various genes. In the present study, the inhibitory effect of 4-((5,6,7,8- tetrahydro-5,5,8,8-tetramethyl-2-naphthyl carbamoyl benzoic acid (Am-80, a synthetic retinoid, on mouse contact hypersensitivity provoked by repeated applications of 2,4-dinitrofluorobenzene (DNFB to the ear was investigated. Five-fold applications of DNFB on ears once per week elicited severe contact dermatitis with marked infiltration of inflammatory cells and elevation of anti-dinitrophenyl (DNP-IgE antibody in the serum. The Am-80 significantly inhibited ear swelling in a dose-dependent manner. In the histopathologic study, infiltration of inflammatory cells was clearly decreased by Am-80. However, Am-80 did not affect the production of DNP-specific IgE antibody both at the transcriptional and post-transcriptional levels. The effects of Am-80 on the transcriptional level of cytokines, interferon (IFN-γ, interleukin (IL-1 and IL-4 in cervical lymph nodes were investigated. Marked elevation of mRNA for all cytokines was observed and Am-80 potently inhibited the expression of IFN-γ mRNA, but not IL-1 and IL-4 mRNA. These findings indicated that Am-80 may inhibit the contact dermatitis at the post-sensitization phase by inhibiting IFN-γ production at the transcriptional level in mice.

Solubilization of 241AmO2 in alveolar macrophage cultures

International Nuclear Information System (INIS)

Robinson, A.V.; Schneider, R.P.

1980-01-01

Cultured rabbit alveolar macrophages were used to study the effect of phagocytosis on the solubilization of 241 AmO 2 . A comparison was made of the solubility of phagocytized AmO 2 and AmO 2 in cell-free media, in the presence and absence of 0.1 mM DTPA. A time-dependent increase of 26% in the soluble (0.1-μm filtrate) intracellular americium fraction was seen in macrophages cultured for 3 days. The addition of 0.1mM DTPA to culture medium resulted in an increase of 36% over the same time period. In contrast, cell-free media without DTPA resulted in less than a 2% increase in solubility after 4 days of incubation, while addition of 0.1mM DTPA resulted in a 5% increase over the same time period. These results indicate cell-mediated solbuilization of phagocytized AmO 2 by macrophages

Progress in AMS measurements at the LLNL spectrometer

International Nuclear Information System (INIS)

Southon, J.R.; Vogel, J.S.; Trumbore, S.E.; Davis, J.C.; Roberts, M.L.; Caffee, M.; Finkel, R.; Proctor, I.D.; Heikkinen, D.W.; Berno, A.J.; Hornady, R.S.

1991-06-01

The AMS measurement program at LLNL began in earnest in late 1989, and has initially concentrated on 14 C measurements for biomedical and geoscience applications. We have now begun measurements on 10 Be and 36 Cl, are presently testing the spectrometer performance for 26 Al and 3 H, and will begin tests on 7 Be, 41 Ca and 129 I within the next few months. Our laboratory has a strong biomedical AMS program of 14 C tracer measurements involving large numbers of samples (sometimes hundreds in a single experiment) at 14 C concentrations which are typically .5--5 times Modern, but are occasionally highly enriched. The sample preparation techniques required for high throughput and low cross-contamination for this work are discussed elsewhere. Similar demands are placed on the AMS measurement system, and in particular on the ion source. Modifications to our GIC 846 ion source, described below, allow us to run biomedical and geoscience or archaeological samples in the same source wheel with no adverse effects. The source has a capacity for 60 samples (about 45 unknown) in a single wheel and provides currents of 30--60μA of C - from hydrogen-reduced graphite. These currents and sample capacity provide high throughput for both biomedical and other measurements: the AMS system can be started up, tuned, and a wheel of carbon samples measured to 1--1.5% in under a day; and 2 biomedical wheels can be measured per day without difficulty. We report on the present status of the Lawrence Livermore AMS spectrometer, including sample throughput and progress towards routine 1% measurement capability for 14 C, first results on other isotopes, and experience with a multi-sample high intensity ion source. 5 refs

Método simples e acessível para determinar amônia liberada pela cama aviária

Directory of Open Access Journals (Sweden)

Hernandes Renata

2001-01-01

Full Text Available A amônia é um gás altamente irritante e causador de estresse às aves confinadas, o que leva à perda de peso, podendo até causar a morte. Por esse motivo, existe grande interesse em se determinar a quantidade de amônia liberada por diferentes camas aviárias e de diferentes condições, bem como os fatores que influenciam a produção desta substância. Assim, idealizou-se o presente trabalho com o objetivo de desenvolver e padronizar uma metodologia simples, acessível, exeqüível para avaliar camas de frangos submetidas a diferentes condições (diferentes tratamentos, tempos de confinamento e temperatura e capaz de determinar a potencialidade da liberação de amônia pela cama de frangos nos galpões. A metodologia baseou-se na adaptação do método da microdifusão, que consta da incubação da cama em um frasco de vidro com capacidade de 500 mL. Sobre a superfície do material incubado coloca-se um béquer de 50 mL contendo 10 mL de solução de ácido bórico 2% (m/v para fixar a amônia exalada pela cama aviária. Esse sistema é fechado e incubado por 15 horas a 30°C e, após, a solução fixadora é retirada e titulada com ácido sulfúrico 0,05 N, usando como indicador uma mistura de verde de bromocresol e alaranjado de metila. O método proposto apresenta precisão para ser usado em experimentos e utiliza material barato e reagentes facilmente encontrados nos laboratórios.

“Josef Albers en Amérique, Peintures sur papier”

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Jennifer Donelly

2012-04-01

Full Text Available Josef Albers, Color study for homage to the square, platinium, not dated, 29,5 X 29,6 cm © 2011 The Josef and Anni foundation / Artists rights society, New-York / Bild-Kunst, Germany. Rights reserved.“Josef Albers en Amérique”, which ran at the Centre Pompidou from February to April 2012, focused on the artist’s work following his 1933 emigration to the United States, where he lived until his death in 1976. Albers was 45 years old when he left Germany and had logged thirteen years at the Bauh...

Calcein AM release-based cytotoxic cell assay for fish leucocytes.

Science.gov (United States)

Iwanowicz, Luke R; Densmore, Christine L; Ottinger, Christopher A

2004-02-01

A non-specific cytotoxic cell assay for fish is presented that is based on the release of the activated fluorochrome calcein AM from lysed carp epithelioma papulosum cyprini (EPC) cells. To establish the suitability of treating EPC cells with calcein AM the uptake and spontaneous release of the calcein AM by the EPC cells was evaluated. Incubation of 5 microM calcein AM in culture medium with 1x10(5)EPC cells well(-1)for a minimum of 3 h provided sufficient labelling. Spontaneous release of fluorescence from the labelled EPC cells during 10 h of post labelling incubation ranged from 30 to 39% of the total observed fluorescence. Cytotoxic activity of trout leucocytes was evaluated at three leucocyte to target cell ratios (10:1, 2:1 and 1:1) following incubation (4, 6, 8, and 10 h) with calcein AM-labelled EPC cells at 15 degrees C. In some instances, the monoclonal antibody specific for the NCC surface receptor NCCRP-1 (MAb5C.6) was included in the cultures. The activity of NCC cells was significantly inhibited in the presence of 0.25 microg well(-1)of MAb5C.6 relative to no antibody (PAM was similar to values reported for rainbow trout leucocytes using the 51Cr-release assay.

América Latina en la transición demográfica, 1800-1980

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Héctor Pérez Brignoli

2010-01-01

Full Text Available El artículo de la sección Archivos en este número de la revista fue presentado por Héctor Pérez-Brignoli en la IV Conferencia Latinoamericana de Población celebrada en México en 1993 y cuyo tema central fue la transición demográfica en América Latina y el Caribe. Tal como lo señalaron los comentaristas de entonces, aún después de transcurridos más de 15 años, puede decirse que constituye una agenda para la investigación sobre la historia de la población de América Latina. El trabajo sugiere una serie de temas que todavía hoy requieren de mayor investigación.En primer lugar señala un conjunto de problemas propios de la historia latinoamericana que se encuentran inexorablemente ligados al cambio demográfico y sin cuyo análisis resulta difícil comprender los cambios en el largo plazo. Dos de ellos se refieren a la historia colonial de América Latina: la catástrofe demográfica y el mestizaje. Si bien sobre ambos existe una abundante producción de investigaciones y amplios consensos, aún hay temas no resueltos. En particular aquellos que se refieren a la dinámica demográfica y al peso relativo que distintos factores tuvieron en su evolución. Igualmente, las particularidades de estos dos procesos en distintas regiones de América Latina requieren de esfuerzos de comparación, tal como lo apunta Mássimo Livi Bacci en un artículo reciente sobre la catástrofe demográfica en América Latina .Otras tres particularidades se refieren a las migraciones, la frontera, y las densidades de población. Particularmente en el siglo XIX, cada uno de estos procesos se encuentra íntimamente ligado a la relación cambio demográfico y crecimiento económico en la etapa de formación de las economías y de los estados nacionales de los países de América Latina. Pero además, si bien son temas presentes en la historia latinoamericana desde el siglo XVI, también son temas contemporáneos como lo evidencian la creciente importancia de

Comparison of effectiveness of four chelating agents in removing incorporated sup 241 Am

Energy Technology Data Exchange (ETDEWEB)

Mingyue, Lun; Yumin, Wang; Zhikang, Wei [Ministry of Nuclear Industry, Taiyuan, SX (China). Inst. of Radiation Protection; and others

1988-02-01

The effectiveness of four chelating agents (Ca-DTPA, Zn-DTPA, quinamic acid and H-73-10) in removing incorporated {sup 241}Am was studied on 200 rats. The results show that Ca-DTPA and Zn-DTPA are more effective than the others. They decreased the {sup 241}Am contents in the rat liver and skeleton down to only about 5 and 10 per cent of the control values, respectively. Quinamic acid has the same effectiveness in reducing the {sup 241}Am contents in the rat skeleton and liver as that of DTPA, but it leads to the cumulation of {sup 241}Am in the kidney, i. e., the {sup 241}Am content in the kidney is even higher than that in control rats. Although H-73-10 can remove {sup 241}Am from the rat organs, it is much less effective than DTPA.

Azúcar en América

Directory of Open Access Journals (Sweden)

Santamaría García, Antonio

2005-04-01

Full Text Available This is an introductory essay to the «Revista de Indias» monographic issue on the sugar industry in America. It briefly explores the main characteristics of this research field as well as the reasons for the historiographical significance it has achieved. It also presents the authors and their contributions to the scientific debate.

Este artículo, un ensayo introductorio del número monográfico de la «Revista de Indias» sobre la industria azucarera en América, revisa brevemente los rasgos fundamentales de las investigaciones acerca de ella y la razón por la que se ha convertido con el tiempo en un tema historiográfico de primer orden. Además, presenta a los autores y sus contribuciones al conocimiento y al debate científico en los estudios incluidos en el citado volumen.

Advanced Manufacturing - National Information Infrastructure (AM-NII) Final Report CRADA No. TO-4013-01

Energy Technology Data Exchange (ETDEWEB)

Vickers, Don [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

2001-03-23

Advanced Manufacturing - National Information Infrastructure (AM-NII) was a multiyear DOE/DP program, involving multiple DOE laboratories and production facilities, focused on improving the manufacturing capabilities of the Nuclear Weapons Complex (NWC) through the application of modem information technologies. AM-NII's published mission states: "In partnership with the manufacturing business sector, AMNII will leverage DOE capabilities to develop, demonstrate, and pilot industrial information infrastructure and applications that enhance national security." LLNL's AM-NII project targeted two opportunities for improving NWC manufacturing capabilities. First was the link between the NWC and its outside suppliers of manufactured parts - web-based supply-chain integration. Second was the cross-site enterprise integration (EI) within the Complex itself. The general approach to supply-chain integration was to leverage the National Information Infrastructure (including Internet) to demonstrate the procurement of fabricated electrical and mechanical parts using a completely paperless procurement process. The general approach to NWC enterprise integration was to utilize SecureNet, a network that provides a secure, high-speed data link among the various NWC sites. If one looks at SecureNet as "the track," our goal was to get the trains running. Cross-site enterprise integration presupposes there is some level of local integration, so we worked both local and cross-site is sues simultaneously. Our EI work was in support of the LLNL Stockpile Life Extension Programs (SLEPs), the Submarine Launch Ballistic Missile Warhead Protection Program (SWPP), and the Laser Cutter Workstation installed at Y-12.

Favoriser l'inclusion financière chez les jeunes d'Amérique latine ...

International Development Research Centre (IDRC) Digital Library (Canada)

26 juin 2017 ... ... en matière d'inclusion financière », qui ont eu lieu en juin à Santiago et à Lima. ... Un projet de recherche financé par le CRDI montre que les femmes jouent ... Selon une étude réalisée en Amérique latine, l'accès à Internet ...

Multimode approach to Am-241 and Np-237 fission induced by 660-MeV protons

Czech Academy of Sciences Publication Activity Database

Karapetyan, G. S.; Balabekyan, A. R.; Demekhina, N. A.; Adam, Jindřich

2009-01-01

Roč. 72, č. 6 (2009), s. 911-916 ISSN 1063-7788 R&D Projects: GA MŠk(CZ) LA08002 Institutional research plan: CEZ:AV0Z10480505 Keywords : FISSION * Am-241 * Np-237 Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders Impact factor: 0.539, year: 2009

Complexation of Am(III) by oxalate in NaClO4 media

International Nuclear Information System (INIS)

Choppin, G.R.; Chen, J.F.

1995-01-01

The complexation of Am(III) by oxalate has been investigated in solutions of NaClO 4 up to 9.0 M ionic strength at 25 degrees C. The dissociation constants of oxalic acid were determined by potentiometric titration, while the stability constants of the Am(III)-oxalate complexation were measured by the solvent extraction technique. A thermodynamic model was constructed to predict the apparent equilibrium constants at different ionic strengths by applying the Pitzer equation using parameters for the Na + -HOx - , Na + -Ox - , AmOx + -ClO 4 - , and Na + -Am(Ox) 2 - interactions obtained by fitting the data

Le désert des héros : récits de vies solitaires dans les séries américaines de fiction

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Joseph Belletante

2010-04-01

Full Text Available Les séries télévisées américaines ont placé ces dernières années l’aventure (au sens d’évasion entre parenthèses pour  produire à grande échelle une nouvelle catégorie de héros, des personnages qui pensent et agissent en doubles de l’individu moderne, dans un « temps présent », sans fin, empoisonnés par un « mal » qui les empêche de se projeter en avant. Nous nous proposons de dresser ici, dans une perspective post-critique, rendant aux spectateurs une autonomie symbolique véritable, un portrait des « états d’âme » humains, des solitudes singulières ou de groupe mis en scène par quatre séries terminées sur le plan de la production afin d’en posséder une lecture globale (Friends, The Sopranos, The West Wing et Ally McBeal, et répondant aux principaux genres de fiction diffusés par les chaînes américaines (comédie, drame et dramédie.For the last twenty years, American television series have left aside the topic of adventure in the sense of evasion in order to produce a new kind of hero. The modern day hero is the mirror image of the modern individual who acts and thinks in an endless present tense, poisoned by an “evil” that keeps him from moving forward. In a post-critic perspective, this article offers a portrait of human “states of mind” that will restitute the spectator his symbolic autonomy, through singular solitudes or the loneliness of a group as is shown by four television series that are no longer in production (Friends, The Sopranos, The West Wing and Ally McBeal in order to allow a global interpretation and that correspond to the main genres of fiction broadcasted by the American network (comedy, drama, and dramedy.

41 CFR 301-2.4 - For what travel expenses am I responsible?

Science.gov (United States)

2010-07-01

... 41 Public Contracts and Property Management 4 2010-07-01 2010-07-01 false For what travel expenses am I responsible? 301-2.4 Section 301-2.4 Public Contracts and Property Management Federal Travel Regulation System TEMPORARY DUTY (TDY) TRAVEL ALLOWANCES INTRODUCTION 2-GENERAL RULES § 301-2.4 For what...

New applications of 14C measurements at the Lund AMS Facility

International Nuclear Information System (INIS)

Stenstroem, K.

1995-11-01

Some new applications of accelerator mass spectroscopy (AMS) with 14 C are presented. In the first part the sample preparation used for production of elemental carbon at the Lund AMS facility is described. The second part concerns the release of 14 C from nuclear power plants. In a one-year study, the total airborne discharge of 14 C from two Swedish reactors was measured. In another study, the fraction of 14 CO 2 of the total airborne 14 C release was determined. The third part of the thesis involves the use of 14 C in nuclear medicine. The long-term retention of 14 C-labelled triolein after a fat-malabsorption test has been investigated by means of AMS by analysis of expired CO 2 . The possibilities of using ultra-low amounts of activity for fat-malabsorption tests, employing AMS technique, is demonstrated. In the last part AMS and 14 C-labelled tracers are used in food chemistry studies of interactions between foods and packaging materials. 22 refs, 8 figs, 2 tabs

La pisciculture familiale améliore la qualité de vie en Amazonie ...

International Development Research Centre (IDRC) Digital Library (Canada)

Pays enclavé de l'Amérique du Sud, la Bolivie affiche le plus bas taux de consommation de poisson par habitant dans le monde, et ce malgré une grande diversité de poissons d'eau douce. Le gouvernement a reconnu récemment la contribution potentielle du poisson pour assurer la sécurité alimentaire et a mis sur pied ...

47 CFR 27.63 - Disturbance of AM broadcast station antenna patterns.

Science.gov (United States)

2010-10-01

... immediate vicinity of AM broadcast stations are responsible for measures necessary to correct disturbance of... the FCC for the AM station, if the disturbance occurred as a result of such construction or...

O modelo AM1 na previsão de frequências vibracionais The vibration frequencies predicted by the AM1 model

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João Carlos Silva Ramos

1999-09-01

Full Text Available We analyse vibrational frequencies of 168 compounds with the AM1 model concerning its experimentally observed gaseous frequencies. Stretching of CH, NH, OH and CO bonds, its related bending frequencies, and the CC frame movements are the studied vibrations. The results show problems with the AM1 vibrational splittings. Often symmetric stretching frequencies, like in CH3, CH2 and NH3, appear switched with the corresponding antisymmetrical ones. Among the studied vibrations many stretchings are overestimated, while bendings oscillate around experimental values. Fluorine stretchings, NN, OO, CH, double and triples CC bonds and cyclic hydrocarbon breathing modes are always overestimated while torsions, umbrella modes and OH/SH stretching are, in average, underestimated. Graphical analysis show that compounds with the lowest molecular masses are the ones with the largest difference to the experimental values. From our results it is not possible to fit confortably the calculated frequencies by a simple linear relationship of the type, n(obs=a*n(AM1. Better aggreement is obtained when different curves are adjusted for the stretching and bending modes, and when a complete linear function is used. Among our studies the best obtained statistical results are for CH, NH and OH. The conclusions obtained in this work will improve the AM1 calculated frequencies leading to accurate results for these properties.

Reseña de: Aguiar Andrade, Amélia y Millán da Costa, Adelaide (Eds. La ville Médiévale en Débat. Instituto de Estudos Medievais, Lisboa, 2013, 206 páginas (Estudos, 8, (Idiomas Francés, Español e Inglés. ISBN: 978-989-97066-9-9.

Directory of Open Access Journals (Sweden)

Ana María Rivera Medina

2017-05-01

Full Text Available Aguiar Andrade, Amélia y Millán da Costa, Adelaide (Eds. La ville Médiévale en Débat. Instituto de Estudos Medievais, Lisboa, 2013, 206 páginas (Estudos, 8, (Idiomas Francés, Español e Inglés. isbn: 978-989-97066-9-9.

Brique après brique, construire le latino-américanisme toulousain (et français)

OpenAIRE

Guibert, Martine; Gaignard, Romain

2013-01-01

Introduction Durant plus d’une quarantaine d’années (des années 1960 jusqu’au début des années 2010), Romain Gaignard a posé une à une les briques de l’édifice latino-américaniste toulousain (et français), selon un processus de construction qui a valorisé rencontres, hasards de la vie et exigences politiques des plus hautes instances nationales. Repoussant les frontières académiques et institutionnelles, jouant avec les emboîtements d’échelles, tant spatiales que temporelles, il a ainsi prati...

Am/Cm Vitrification Process: Vitrification Material Balance Calculations

International Nuclear Information System (INIS)

Smith, F.G.

2000-01-01

This report documents material balance calculations for the Americium/Curium vitrification process and describes the basis used to make the calculations. The material balance calculations reported here start with the solution produced by the Am/Cm pretreatment process as described in ``Material Balance Calculations for Am/Cm Pretreatment Process (U)'', SRT-AMC-99-0178 [1]. Following pretreatment, small batches of the product will be further treated with an additional oxalic acid precipitation and washing. The precipitate from each batch will then be charged to the Am/Cm melter with glass cullet and vitrified to produce the final product. The material balance calculations in this report are designed to provide projected compositions of the melter glass and off-gas streams. Except for decanted supernate collected from precipitation and precipitate washing, the flowsheet neglects side streams such as acid washes of empty tanks that would go directly to waste. Complete listings of the results of the material balance calculations are provided in the Appendices to this report

Formación del licenciado en Enfermería en América Latina

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Carolina Elena Luengo-Martínez

2016-01-01

Full Text Available Antecedentes: actualmente, América Latina requiere profesionales en Enfermería cuyo perfil de egreso pueda responder a los cambios que ha traído consigo la globalización. Se sabe que la formación del licenciado en Enfermería es disímil en los países de América Latina e, incluso, al interior de estos. Objetivo: describir la formación del licenciado en Enfermería en América Latina en términos de plan de estudio, reglamentación u organismos regulatorios, tiempo, requisitos de egreso y perfil del licenciado. Materiales y método: revi- sión bibliográfica de las páginas web de universidades latinoamericanas que forman licenciados en Enfermería; los criterios de inclusión fueron: ranking de universidades del país (cuando existía, universidades con página web actualizada y disponibilidad de la información. Conclusión: se constata la heterogeneidad en la formación del licenciado en Enfermería en América Latina, que puede ser un factor de debilitamiento para la disciplina así como para la profesión. Se sugiere un consenso sobre una formación curricular común en la región, que apunte a un perfil profesional apropiado, que proporcione la capacidad de enfrentar y satisfacer las necesidades que traen consigo los desafíos de nuestro tiempo.

Universidad y calidad en América Latina en perspectiva comparada: Interrogantes y desafíos Universidade e qualidade na América Latina em perspectiva comparada: interrogações e desafios University and quality in Latin America in comparative perspective: questions and challenges

Directory of Open Access Journals (Sweden)

Norberto Fernández Lamarra

2012-11-01

Full Text Available A partir de una serie de interrogantes y desafíos que se plantean inicialmente sobre los procesos de evaluación de la calidad, se caracterizan las políticas neoliberales en materia de educación superior desarrolladas en la mayoría de los países de América Latina y sus consecuencias sobre los sistemas universitarios y su evolución. Luego se analizan diversas concepciones teórico-metodológicas sobre calidad y sobre su evaluación y acreditación. También se consideran estos procesos en perspectiva comparada, analizando los desarrollados en Estados Unidos y Canadá, en Europa y en América Latina. Finalmente se plantean críticamente las principales tendencias registradas en América Latina en cuanto a evaluación y acreditación de la calidad de la educación superior, sus logros y limitaciones y, particularmente, sus desafíos.A partir de uma série de interrogações e desafios postos inicialmente sobre os processos de avalia­ção da qualidade, são caracterizadas as políticas neoliberais em matéria de educação superior desenvolvidas na maioria dos países da América Latina e suas consequências sobre os sistemas universitários e sua evolução. Em seguida são analisadas diversas concepções teórico-metodológicas sobre qualidade e sobre sua avaliação e acreditação. Também são considerados estes processos na perspectiva comparada, analisando os desenvolvidos nos Estados Unidos e Canadá, na Europa e na América Latina. Finalmente são apresentadas criticamente as principais tendências registradas na América Latina relativamente à avaliaçao e à acreditação da qualidade da educação superior, seus êxitos e limitações e, particularmente, seus desafios.Based on a series of questions and challenges posed initially on processes of quality evaluation, the text characterizes the neoliberal policies in higher education as developed in most Latin American countries and their impact on university systems and their

47 CFR 22.371 - Disturbance of AM broadcast station antenna patterns.

Science.gov (United States)

2010-10-01

... construct or modify towers in the immediate vicinity of AM broadcast stations are responsible for measures... radiation parameters specified by the FCC for the AM station, if the disturbance occurred as a result of...

Queering I Am Not Your Negro: or Why We Need James Baldwin More Than Ever

Directory of Open Access Journals (Sweden)

Robert J. Corber

2017-10-01

similar effect on audiences. However, even as it succeeds in reanimating Baldwin’s voice for a new political era, I Am Not Your Negro inadvertently exposes the difficulty of fully capturing or honoring the writer’s complex legacy. As scholars have long noted, interest in Baldwin’s life and work tends to divide along racial and sexual lines, and Peck’s documentary is no exception. The filmmaker privileges Baldwin’s blackness over his queerness by overlooking the parts of The Devil Finds Work and No Name in the Street in which the writer’s queerness figures prominently.

Amélioration de la santé des mères et des enfants dans les régions ...

International Development Research Centre (IDRC) Digital Library (Canada)

importants défis et possibilités à l'échelon des États influencent les efforts déployés pour réduire les décès. Ce projet appuiera les efforts déployés par le gouvernement dans l'État du Delta pour améliorer la prestation et l'utilisation des services de ...

A New Photometric Study of Ap and Am Stars in the Infrared

Energy Technology Data Exchange (ETDEWEB)

Chen, P. S.; Liu, J. Y.; Shan, H. G., E-mail: chenps@ynao.ac.cn [Yunnan Observatories and Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011 (China)

2017-05-01

In this paper, 426 well known confirmed Ap and Am stars are photometrically studied in the infrared. The 2MASS, Wide-field Infrared Survey Explorer ( WISE ), and IRAS data are employed to make analyses. The results in this paper have shown that in the 1–3 μ m region over 90% Ap and Am stars have no or little infrared excesses, and infrared radiations in the near-infrared from these stars are probably dominated by the free–free emissions. It is also shown that in the 3–12 μ m region, the majority of Ap stars and Am stars have very similar behavior, i.e., in the W 1– W 2 (3.4–4.6 μ m) region, over half of Ap and Am stars have clear infrared excesses, which are possibly due to the binarity, the multiplicity, and/or the debris disk, but in the W 2– W 3 (4.6–12 μ m) region they have no or little infrared excess. In addition, in the 12–22 μ m region, some of Ap stars and Am stars show the infrared excesses and infrared radiations for these Ap and Am stars are probably due to the free–free emissions. In addition, it is seen that the probability of being the binarity, the multiplicity and/or the debris disk for Am stars is much higher than that for Ap stars. Furthermore, it can be seen that, in general, no relations can be found between infrared colors and spectral types either for Ap stars or for Am stars.

A New Photometric Study of Ap and Am Stars in the Infrared

International Nuclear Information System (INIS)

Chen, P. S.; Liu, J. Y.; Shan, H. G.

2017-01-01

In this paper, 426 well known confirmed Ap and Am stars are photometrically studied in the infrared. The 2MASS, Wide-field Infrared Survey Explorer ( WISE ), and IRAS data are employed to make analyses. The results in this paper have shown that in the 1–3 μ m region over 90% Ap and Am stars have no or little infrared excesses, and infrared radiations in the near-infrared from these stars are probably dominated by the free–free emissions. It is also shown that in the 3–12 μ m region, the majority of Ap stars and Am stars have very similar behavior, i.e., in the W 1– W 2 (3.4–4.6 μ m) region, over half of Ap and Am stars have clear infrared excesses, which are possibly due to the binarity, the multiplicity, and/or the debris disk, but in the W 2– W 3 (4.6–12 μ m) region they have no or little infrared excess. In addition, in the 12–22 μ m region, some of Ap stars and Am stars show the infrared excesses and infrared radiations for these Ap and Am stars are probably due to the free–free emissions. In addition, it is seen that the probability of being the binarity, the multiplicity and/or the debris disk for Am stars is much higher than that for Ap stars. Furthermore, it can be seen that, in general, no relations can be found between infrared colors and spectral types either for Ap stars or for Am stars.

La psicología del ejercicio y del deporte en Brasil y América del Sur

OpenAIRE

Becker Júnior, Benno

2001-01-01

Es difícil determinar el inicio exacto de la Psicología del Ejercicio y Deporte en un país, mayormente en América del Sur, sin correr el riesgo de cometer varias injusticias, pues estos eventos tienen poca o ninguna divulgación. Los registros oficiales realizados por Feige (1977) muestran que la Psicología del Ejercicio y Deporte, en América del Sur, se inició en Brasil, en 1954 en el Departamento de Árbitros de la Federación Paulista de Fútbol. Ahora está en su quinta década, con 47 anos. Es...

Production of monodisperse respirable aerosols of 241AmO2 and evaluation of in vitro dissolution

International Nuclear Information System (INIS)

Boyd, H.A.; Raabe, O.G.; Peterson, P.K.

1974-01-01

A method is described for production of monodisperse (sigma//sub g/ less than 1.2) particles of 241 AmO 2 for use in inhalation experiments with dogs and rodents. The effects of physical and chemical factors on the production of polydisperse aerosols of 241 AmO 2 were studied and evaluated. The best aerosol was achieved when a suspension of americium hydroxide with 2.5 mg Am/ml at pH = 7.3 was aerosolized and passed through two heating columns in succession, the first at 300 0 C and the second at 1050 0 C. The particles were roughly spherical and had densities near 8 gm/cm 3 ; the aerosol AMAD and sigma/sub g/ were about 1.5 μm and 1.7, respectively. Monodisperse particles were separated and collected with the Lovelace Aerosol Particle Separator (LAPS) and subsequently suspended in deionized water with pH adjusted to 10.2 with NH 3 for nebulization to produce monodisperse aerosols for inhalation exposures. Particles collected on filters during inhalation experiments were used for evaluation of in vitro dissolution rates with two systems and various forms of a lung fluid simulant. The important role of phosphate ions in such dissolution systems was demonstrated, suggesting the potential for the equally important role of free phosphate in retarding dissolution of AmO 2 particles in the lung. (U.S.)

Cosmic ray and gamma astrophysics with the AMS-02 experiment

International Nuclear Information System (INIS)

Natale, Sonia

2006-01-01

The Alpha Magnetic Spectrometer (AMS) is a particle physics detector designed to operate on the International Space Station (ISS) for a minimum period of three years. The aim of AMS is the direct detection of charged particles in the rigidity range from 0.5 GV to few TV to perform high statistics studies of cosmic rays in space and a search for antimatter and dark matter. AMS will provide precise gamma measurements in the GeV range. In addition, the good angular resolution and identification capabilities of the detector will allow clean studies of galactic and extra-galactic sources, the diffuse gamma background and gamma ray bursts

Effects of Organic Acids and Sylvite on Phytoextraction of 241Am Contaminated Soil.

Science.gov (United States)

Wang, Ping; Du, Liang; Tan, Zhaoyi; Su, Rongbo; Li, Taowen

2017-03-01

Contamination of soil with Americium ( 241 Am) at nuclear sites in China poses a serious problem. We screened six plants, from five families, for their 241 Am-enrichment potential. Europium (Eu), which is morphologically and chemically similar to the highly toxic 241 Am, was used in its place. Moreover, the effects of sylvite, citric acid (CA), malic acid (MA), and humic acid (HA) on the absorption of 241 Am by the plants, and its transport within them, were evaluated along with their effect on plant biomass and 241 Am extraction volume. Barley and cabbage showed relatively stronger Eu accumulation capacities. Citric acid promoted the absorption of 241 Am by barley roots and its transport within the plants. The effects of sylvite were not obvious and those of HA were the weakest in case of sunflower; HA, however, maximally increased the biomass of the plants. Our results could provide the basis for future radionuclide phytoremediation of contaminated soils.

Distortions caused by the signal processing in analog AM modulators

International Nuclear Information System (INIS)

Njau, E.C.

1988-08-01

Complete analytical expressions for distortions caused by signal processing in analog AM modulators are developed. The salient features in these expressions are shown to be consistent with displays of actual spectra of AM signals. Finally suggestions are given on how the distortions may be practically minimized. (author). 6 refs, 3 figs

Estimation of cross talk between lungs and liver for 241Am using phoswich detector

International Nuclear Information System (INIS)

Mishra, Lokpati; Nadar, Minal Y.; Singh, I.S.; Sawant, P.D.

2018-01-01

241 Am is used as a tracer for in-vivo assessment of plutonium (Pu) in the lungs. Internal contamination of 241 Am is estimated by measuring its 59.5 keV photons then activity of Pu is estimated by applying Pu/ 241 Am ratio obtained from radiochemical analysis of fecal/workplace sample. According to ICRP systemic bio-kinetic model, for Type M compounds of 241 Am after 100 days post inhalation intake, 241 Am activity in liver exceeds 241 Am activity present in the lungs and goes on increasing even up to about ten years. In this work, cross talk (CT) between lungs and liver viz. CT (liver to lungs) and CT (lungs to liver) for the actinide monitoring system for 241 Am using realistic thorax Lawrence Livermore National Laboratory (LLNL) phantom were estimated. Also CT has been estimated using voxel phantom by carrying out Monte Carlo simulations in FLUKA code. This study will help in reporting the actual activity present in the individual organ (lungs, liver)

Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U

Energy Technology Data Exchange (ETDEWEB)

Perron, A., E-mail: perron1@llnl.gov [Lawrence Livermore National Laboratory, Livermore, CA 94550 (United States); Turchi, P.E.A.; Landa, A. [Lawrence Livermore National Laboratory, Livermore, CA 94550 (United States); Oudot, B.; Ravat, B.; Delaunay, F. [CEA-Centre de Valduc, 21120, Is sur Tille (France)

2016-12-15

A newly developed self-consistent CALPHAD thermodynamic database involving Al, Am, Ga, Pu, and U is presented. A first optimization of the slightly characterized Am-Al and completely unknown Am-Ga phase diagrams is proposed. To this end, phase diagram features as crystal structures, stoichiometric compounds, solubility limits, and melting temperatures have been studied along the U-Al → Pu-Al → Am-Al, and U-Ga → Pu-Ga → Am-Ga series, and the thermodynamic assessments involving Al and Ga alloying are compared. In addition, two distinct optimizations of the Pu-Al phase diagram are proposed to account for the low temperature and Pu-rich region controversy. The previously assessed thermodynamics of the other binary systems (Am-Pu, Am-U, Pu-U, and Al-Ga) is also included in the database and is briefly described in the present work. Finally, predictions on phase stability of ternary and quaternary systems of interest are reported to check the consistency of the database.

Évaluer la performance écologique d’un aménagement autoroutier du point de vue de la biodiversité végétale

Directory of Open Access Journals (Sweden)

MAYRAND, Flavie ; MARAGE, Damien ; GILLIOT, Jean-Marc ; MICHELIN, Joël ; COQUET, Yves

2013-03-01

Full Text Available La réglementation et les attentes sociétales incitent aujourd’hui les aménageurs du territoire à évaluer les impacts environnementaux de leurs projets de construction, mais également à prévoir des mesures et des actions pour créer ou restaurer la biodiversité des espaces modifiés. Des questions se posent donc aux gestionnaires sur les méthodes à utiliser et les indicateurs à employer pour évaluer la performance écologique d’un aménagement. Quelques éléments de réponse sont présentés ici, sur la base d’une étude de cas portant sur le Mont-aux-Liens, un aménagement paysager contigu à l’autoroute A19.

Évaluer la performance écologique d’un aménagement autoroutier du point de vue de la biodiversité végétale

Directory of Open Access Journals (Sweden)

MAYRAND, Flavie

2015-06-01

Full Text Available La réglementation et les attentes sociétales incitent aujourd’hui les aménageurs du territoire à évaluer les impacts environnementaux de leurs projets de construction, mais également à prévoir des mesures et des actions pour créer ou restaurer la biodiversité des espaces modifiés. Des questions se posent donc aux gestionnaires sur les méthodes à utiliser et les indicateurs à employer pour évaluer la performance écologique d’un aménagement. Quelques éléments de réponse sont présentés ici, sur la base d’une étude de cas portant sur le Mont-aux-Liens, un aménagement paysager contigu à l’autoroute A19.

Recours aux cultures céréalières traditionnelles pour améliorer la ...

International Development Research Centre (IDRC) Digital Library (Canada)

... ce qui crée des emplois sur place et aide les femmes à offrir des produits transformés nutritifs ayant de meilleures possibilités de mise en marché. Cette approche, qui contribue à l'amélioration de la qualité de vie des petits agriculteurs, fait partie intégrante d'une solution durable à la pauvreté en milieu rural en Inde.

[Effects of intrathecal administration of AM22-52 on mechanical allodynia and CCL2 expression in DRG in bone cancer rats].

Science.gov (United States)

Chen, Ya-Juan; Huo, Yuan-Hui; Hong, Yanguo

2017-02-25

The pain peptide adrenomedullin (AM) plays a pivotal role in pathological pain. The present study was designed to investigate the effect of blockade of AM receptor on bone cancer pain (BCP) and its mechanism. BCP was developed by inoculation of Walker 256 mammary gland carcinoma cells in the tibia medullary cavity of Sprague Dawley rats. The selective AM receptor antagonist AM 22-52 was administered intrathecally on 15 d after the inoculation. Quantitative real-time PCR was used to detect mRNA level of CC chemokine ligand 2 (CCL2) in dorsal root ganglion (DRG). Double immunofluorescence staining was used to analyze the localizations of CCL2 and AM in DRG of normal rats. The results showed that, from 6 to15 d after the inoculation, the animals showed significant reduction in the mechanical pain threshold in the ipsilateral hindpaw, companied by the decline in bone density of tibia bone. The expression of CCL2 mRNA in DRG of BCP rats was increased by 3 folds (P DRG neurons. These results suggest that AM may play a role in the pathogenesis of BCP. The increased AM bioactivity up-regulates CCL2 expression in DRG, which may contribute to the induction of pain hypersensitivity in bone cancer.

La integración de los microdatos censales de América Latina: el proyecto IPUMS-América Latina

Directory of Open Access Journals (Sweden)

Robert McCaa

2005-01-01

Full Text Available Gracias al pionero esfuerzo del doctor Gustavo Cabrera y de otros grandes próceres de la demografía, en América Latina sobrevive un vasto archivo de microdatos censales; sin embargo la mayor parte de ellos se mantiene inaccesible a los investigadores.En la trayectoria académica y científica del profesor Cabrera ha sido constante su preocupación por las fuentes de información. Hoy el proyecto Integrated Public Use ofMicrodata Series para América Latina (IPUMS-AL acomete con ímpetu la difícil tareade integrar los microdatos censales de esta región, haciendo uso intensivo y extensivo delas nuevas tecnologías pero, sobre todo, contagiándose del empeño que instituciones yeminentes demógrafos latinoamericanos han dedicado a mejorar la calidad y a preser-var estos datos, que constituyen sin lugar a dudas los tesoros estadísticos de AméricaLatina. El proyecto IPUMS-América Latina cuenta con el soporte económico necesario para integrar esos microdatos en una única base de datos armonizada que estaría destinadaa la investigación académica y a la que se podría acceder desde Internet. Los microdatos censales de 1960, 1970, 1990 y 2000 de México ya han sido integrados (www.ipums.org/international como resultado del trabajo colectivo desarrollado en el INEGI, socio fundador del proyecto, de destacados demógrafos mexicanos, y del Population Center de la Universidad de Minnesota.

Steven Hawking to visit Texas A&M in spring

CERN Multimedia

Xavier, D

2002-01-01

Stephen Hawking will visit Texas A&M University from Feb. 24 to March 21 2003 to participate in the inaugural meeting of the George P. and Cynthia W. Mitchell Institute for Fundamental Physics. This institute will bring several of the world's top physicists to A&M for a month-long exploration of the latest ideas on topics ranging from superstrings to M-theory and supergravity (1/2 page).

AMS radiocarbon dating of 'Grotta Cappuccini' in Southern Italy

International Nuclear Information System (INIS)

Quarta, G.; Calcagnile, L.; D'Elia, M.; Rizzo, A.; Ingravallo, E.

2004-01-01

We present the results of AMS radiocarbon dating of human bones recovered in 'Grotta Cappuccini', a prehistoric cave in Galatone, Lecce (Southern Italy). The AMS analysis has confirmed the archaeological dating of the cave to the period between the end of the Copper Age and the early Bronze Age, and has given a fundamental contribution to the chronological definition of an important cultural aspect of the prehistory of Southern Italy

Selon une étude réalisée en Amérique latine, l'investissement dans l ...

International Development Research Centre (IDRC) Digital Library (Canada)

Selon une étude réalisée en Amérique latine, l'accès à Internet haute vitesse ... contribuer au développement social et économique, mais uniquement s'il est ... Le réseau a aussi découvert que l'impact des services à large bande sur la ...

Améliorer le développement de la petite enfance et le mieux-être ...

International Development Research Centre (IDRC) Digital Library (Canada)

Il définira particulièrement les facteurs qui améliorent la résistance des personnes déplacées et des réfugiés pour cause de conflits à ces menaces. Il permettra de mettre au point et de mettre à l'essai des interventions adaptées à la réalité culturelle, tenant compte des sexospécificités et abordables qui profiteront à un ...

Non-scaled analogue modelling of AMS development during viscous flow: a simulation on diapir-like structures

Czech Academy of Sciences Publication Activity Database

Kratinová, Zuzana; Závada, P.; Hrouda, F.; Schulmann, K.

2006-01-01

Roč. 418, č. 1-2 (2006), s. 51-61 ISSN 0040-1951 R&D Projects: GA ČR GA205/03/0204 Institutional research plan: CEZ:AV0Z30120515 Keywords : analogue modelling * AMS * diapir Subject RIV: DE - Earth Magnetism, Geodesy, Geography Impact factor: 1.675, year: 2006

Increasing Scientific Literacy at Minority Serving Institutions Nationwide through AMS Professional Development Diversity Workshops

Science.gov (United States)

Brey, J. A.; Geer, I. W.; Mills, E. W.; Nugnes, K. A.; Moses, M. N.

2011-12-01

Increasing students' earth science literacy, especially those at Minority Serving Institutions (MSIs), is a primary goal of the American Meteorological Society (AMS). Through the NSF-supported AMS Weather Studies and AMS Ocean Studies Diversity workshops for Historically Black College and Universities, Hispanic Serving Institutions, Tribal Colleges and Universities, Alaska Native, and Native Hawaiian Serving Institutions, AMS has brought meteorology and oceanography courses to more students. These workshops trained and mentored faculty implementing AMS Weather Studies and AMS Ocean Studies. Of the 145 institutions that have participated in the AMS Weather Studies Diversity Project, reaching over 13,000 students, it was the first meteorology course offered for more than two-thirds of the institutions. As a result of the AMS Ocean Studies Diversity Project, 75 institutions have offered the course to more than 3000 students. About 50 MSIs implemented both the Weather and Ocean courses, improving the Earth Science curriculum on their campuses. With the support of NSF and NASA, and a partnership with Second Nature, the organizing entity behind the American College and University President's Climate Commitment (ACUPCC), the newest professional development workshop, AMS Climate Studies Diversity Project will recruit MSI faculty members through the vast network of Second Nature's more than 670 signatories. These workshops will begin in early summer 2012. An innovative approach to studying climate science, AMS Climate Studies explores the fundamental science of Earth's climate system and addresses the societal impacts relevant to today's students and teachers. The course utilizes resources from respected organizations, such as the IPCC, the US Global Change Research Program, NASA, and NOAA. In addition, faculty and students learn about basic climate modeling through the AMS Conceptual Energy Model. Following the flow of energy in a clear, simplified model from space to

AMS of {sup 14}C at low energies

Energy Technology Data Exchange (ETDEWEB)

Suter, M.; Huber, R.; Jacob, S. [ETHZ, Zurich (Switzerland); Synal, H.A. [Paul Scherrer Inst. (PSI), Villigen (Switzerland)

1997-09-01

At the ETH/PSI AMS facility {sup 14}C test measurements have been performed at low terminal voltages of 0.5 and 1 MV in order to study the feasibility of AMS with very small accelerators. These experiments have demonstrated that interfering molecules ({sup 13}CH and {sup 12}CH{sub 2}) in charge states 1{sup +} and 2{sup +} can be destroyed in an adequate Ar gas stripper. These new results imply the feasibility of a new generation of very small accelerator systems for {sup 14}C. (author) 1 fig., 3 refs.

On Jewish Being: Notes on Jean Améry

Directory of Open Access Journals (Sweden)

Andrew Benjamin

2017-02-01

Full Text Available That the question of identity takes on a sense of urgency, one with its own possibilities and impossibilities, the moment that identity is bound up with death, is hardy surprising. What follows are a series of reflections on the question of identity, Jewish identity, raised by Jean Améry’s remarkable text On the Necessity and Impossibility of Being a Jew (Über Zwang und Unmöglichkeit, Jude zu sein. Améry’s text was of course published in the wake of his own experiences as an active member of the resistance, as having been imprisoned in Auschwitz and as the victim of torture. Philosophically, rather than biographically, if there were a point of comparison, then it is to Levinas’s 1947 text Etre juif. Both pose the problem of how the question of Jewish identity, Jewish being, is to be understood in the wake of the Shoah. The meaning of the formulations - Jude zu sein, Jude sein, Etre juif, Jewish being – delimits the question to be addressed. This will be the case even if its point of address, namely what the question stages, is itself far from straightforward. Moreover, while what is demanded within that question is itself philosophically important, it is equally the case that the question of Jewish being is at work within both communities and synagogues across the Jewish world. As a consequence it is as much a philosophical question as it is one that has a structuring effect on how Jewish survival is conceived (and thus equally on what that survival is taken to be. How survival is understood is an issue that continues to exert its force. Who is the subject of survival? What is the subject of survival? Who or what has been subjected to the issue of survival? Survival is both more nuanced and complex than the brute fact of an afterlife. Jewish being as a present question – a question of the present - continues therefore.

AMS using 14UD Pelletron at TIFR, Mumbai: present status and future prospects

International Nuclear Information System (INIS)

Surendran, P.; Gupta, A.K.; Nair, J.P.; Mahata, K.; Shrivastava, A.; Yadav, M.L.; Sparrow, H.; Thomas, R.G.; Bhagwat, P.V.; Kailas, S.; Kale, R.M.

2011-01-01

The AMS (Accelerator Mass Spectrometry) is a versatile tool employed in multidisciplinary programmes. The AMS programme at the BARC-TIFR 14UD Pelletron accelerator has been initiated with major emphasis on the determination of 36 Cl concentration in environment in general and water samples in particular. Preliminary measurements related to detection of 129 I have been carried out in recent past. The system used for AMS measurement is based on a 14 MV Tandem Accelerator. In this paper, the status and future prospects of AMS programme at BARC-TIFR Pelletron Accelerator Facility are presented

Mexican participation in the AMS project

Science.gov (United States)

Menchaca-Rocha, A.; Buenerd, M.; Cabrera, J. I.; Canizal, C.; Esquivel, O.; Núñez, R.; Plascencia, J. C.; Reyes, T.; Villoro, M. F.

2001-05-01

Optical characterization of hydrophobic silica aerogel SP-25 for the RICH, and a scheme to generate particle-ID conditions on TOF and Tracker amplitude data are reported, as part of a Mexican effort to contribute to the AMS Project. .

Systemic Manifestations in Pyridox(am)ine 5'-Phosphate Oxidase Deficiency.

Science.gov (United States)

Guerriero, Réjean M; Patel, Archana A; Walsh, Brian; Baumer, Fiona M; Shah, Ankoor S; Peters, Jurriaan M; Rodan, Lance H; Agrawal, Pankaj B; Pearl, Phillip L; Takeoka, Masanori

2017-11-01

Pyridoxine is converted to its biologically active form pyridoxal-5-phosphate (P5P) by the enzyme pyridox(am)ine 5'-phosphate oxidase and serves as a cofactor in nearly 200 reactions in the central nervous system. Pyridox(am)ine 5'-phosphate oxidase deficiency leads to P5P dependent epilepsy, typically a neonatal- or infantile-onset epileptic encephalopathy treatable with P5P or in some cases, pyridoxine. Following identification of retinopathy in a patient with pyridox(am)ine 5'-phosphate oxidase deficiency that was reversible with P5P therapy, we describe the systemic manifestations of pyridox(am)ine 5'-phosphate oxidase deficiency. A series of six patients with homozygous mutations of PNPO, the gene coding pyridox(am)ine 5'-phosphate oxidase, were evaluated in our center over the course of two years for phenotyping of neurological and systemic manifestations. Five of six were born prematurely, three had anemia and failure to thrive, and two had elevated alkaline phosphatase. A movement disorder was observed in two children, and a reversible retinopathy was observed in the most severely affected infant. All patients had neonatal-onset epilepsy and were on a continuum of developmental delay to profound encephalopathy. Electroencephalographic features included background slowing and disorganization, absent sleep features, and multifocal and generalized epileptiform discharges. All the affected probands carried a homozygous PNPO mutation (c.674 G>T, c.686 G>A and c.352G>A). In addition to the well-described epileptic encephalopathy, pyridox(am)ine 5'-phosphate oxidase deficiency causes a range of neurological and systemic manifestations. A movement disorder, developmental delay, and encephalopathy, as well as retinopathy, anemia, and failure to thrive add to the broadening clinical spectrum of P5P dependent epilepsy. Copyright © 2017 Elsevier Inc. All rights reserved.

An Am-Be neutron source Accident and its management

International Nuclear Information System (INIS)

Bai Guang; Wang Xinyong; Wu Zhenghan

1988-01-01

An 241 Am-Be neutron source for inaustrial use was lost in a county of Guangdong Province in April, 1982. A school boy picked up and brought it to his home. The source was broken and 10 people were contaminated with radioactive substance. The boy (X) received the highest external irradiation, with chest dose of 0.12 Sv and hand dose of 0.32 Sv. His brother (Y) incurred the heaviest internal contamination by 241 Am, about 3.3 x 10 3 Bq. Decorporation was carried out in four persons including Y, and the excretion of 241 Am in stools and urine was increased significantly. With the medical examination performed upon these persons one and half years after the accident, no positive findings induced by radiation were found except the increase of chromosomal aberration rate in lymphocytes

Physics of charged cosmic rays with the AMS experiment

Energy Technology Data Exchange (ETDEWEB)

Vialle, J.P

2000-04-01

The AMS experiment aims at searching for primordial antimatter, non-baryonic dark matter, and measuring with high statistics and high accuracy the electrically charged cosmic ray particles and light nuclei in the extraterrestrial space beyond the atmosphere. AMS is the first magnetic spectrometer which will be flown in space. It will be installed for 3 years on the international space station (ISS) in 2003. A test flight with the space shuttle DISCOVERY took place in June 1998 with a first detector and gave many results: best limit on the existence of antinuclei, fluxes of protons, leptons, and helium nuclei above the geomagnetic threshold, existence of a secondary flux below the geomagnetic threshold. These results are described below. The physics goal and perspectives for AMS on the space station with an improved detector are described as well. (author)

macrosociales en América Latina

Directory of Open Access Journals (Sweden)

Jorge Martínez Pizarro

2003-01-01

Full Text Available Luego de una década de intenso crecimiento de las remesas, cuya magnitud relativa es insoslayable en varios países, se evalúan sus posibles impactos macrosociales a nivel nacional en países de América Latina. Se presenta una breve alusión teórica al fenómeno de las remesas y se sintetizan las inquietudes que rodean a este fenómeno en la región: la estimación de su volumen, los costos de transferencia y las posibilidades para generar externalidades productivas en las áreas de recepción de estos recursos. Además, se pone atención en las asociaciones de migrantes que envían remesas colectivamente. Después se examinan sus impactos macrosociales contrastados con información empírica disponible sobre la pobreza, la distribución del ingreso y el gasto social en países seleccionados. Al hablar de “migración”, “remesas” y “desarrollo” conviene examinar científicamente esas relaciones con el bienestar y no únicamente emplear una visión optimista en función de su aumento y la magnitud absoluta y relativa que han alcanzado

Dona Amélia Queen Reformatory: A sanatorium for weak children

Directory of Open Access Journals (Sweden)

do Nascimento, Dilene Raimundo

2008-12-01

Full Text Available This article intends to examine the conditions of the city of Rio de Janeiro, regarding the city's health safety or the living and housing conditions of its workers, which helped bringing about the spread of tuberculosis in the end of the 19th century and beginning of the 20th century. Evidencing the high incidence of tuberculosis at this time, it intends to verify the reasons for creating the Brazilian League Against Tuberculosis and its purpose, analyzing its project of assistance to children's health and its intervention to discipline, which resulted in the creation of the Dona Amélia Queen Reformatory.

Este artigo pretende examinar as condições da cidade do Rio de Janeiro, seja no que diz respeito à insalubridade da cidade seja em relação às condições de vida e moradia dos seus trabalhadores, que propiciavam a disseminação da tuberculose no final do século XIX e início do XX. Constatando-se a alta incidência da tuberculose nessa época, pretende-se verificar a motivação de criação e o propósito da Liga Brasileira contra a Tuberculose e analisar o seu projeto de assistência à saúde das crianças e sua intervenção disciplinar, que resultou na criação do Preventório Rainha Dona Amélia.

Automation of AMS measurements in Utrecht

International Nuclear Information System (INIS)

Langerak, J.J.; Haas, A.P. de; Kronenburg, M.; Smit, W.; Verhelst, B.; Borg, K. van der

1987-01-01

This article describes the automation of AMS measurements by means of a MicroVAX I computer connected to a fiber optic data acquisition system. The hardware architecture allows a gradual change from manual to computerised control of the tandem accelerator. (orig.)

Technical advances at the ANTARES AMS centre

International Nuclear Information System (INIS)

Lawson, E.M.; Fink, D.; Hotchkis, M.A.C.; Hua, Q.; Jacobsen, G.; Smith, A.M.

1998-01-01

Full text: Accelerator Mass Spectrometry (AMS) began at ANTARES in late 1991. Many technical improvements and upgrades to the AMS measurement system have taken place since then. The AMS Centre routinely measures 14C (to better than 1% precision), 36Cl and 129I. The capability to measure 10Be and 26Al, is established although further development is still in progress. A capability to analyse Actinides is being established and is the subject of another paper to this conference. This paper reviews some of the more recent technical improvements to the facility. For our 14C analyses a new gas stripper system and high resolution ExB velocity analyser have been installed and are in routine operation. The gas stripper is also used for most other isotopes. A new 90 degree spherical ESA allows 129I measurements without the need for time-of-flight analysis. Installation of a critical insulation flange in the isotope cycling system has permitted bouncing of 12C- and the measurement of 13C/12C ratios. A complete set of Dowlish tubes now allows spark free operation to 8 MV for our 10Be and 36Cl measurements. The very recent installation of pelletron chains is being assessed

Antimatter search with AMS (Alpha Magnetic Spectrometer) during STS-91 precursor flight

International Nuclear Information System (INIS)

Alpat, Behcet

2000-01-01

The Alpha Magnetic Spectrometer (AMS) is designed to study the antimatter, matter and dark matter in space. AMS successfully flown on space shuttle Discovery during precursor flight STS-91 in a 51.7 degree sign orbit at altitudes between 320 and 390 km. No antimatter nuclei with Z ≥ 2 were detected. In this report we present the AMS performances during shuttle flight and we give new limits on antimatter/matter flux ratio

A/M Area Vadose Zone Monitoring Plan (U)

International Nuclear Information System (INIS)

Kupar, J.; Jarosch, T.R.; Jackson, D.G. Jr.; Looney, B.B.; Jerome, K.M.; Riha, B.D.; Rossabi, J.; Van Pelt, R.S.

1998-03-01

Characterization and monitoring data from implementation and the first two and one half years of vadose zone remediation operations indicate that this activity has substantially improved the performance of the A/M Area Groundwater Corrective Action Program. During this period, vadose zone remediation removed approximately 225, 000 lbs (100,000 Kg) of chlorinated solvents (CVOCs) from the subsurface. Further, vadose zone remediation system operation increased the overall CVOC removal rate of the A/M Area Groundwater Corrective Action by 300% to 500% during this period versus the groundwater pump and treat system along. Various support activities have been performed to support operation and documentation of performance of the vadose zone remediation system. These activities address performance of existing systems (contaminant distributions, zone of influence, and process monitoring data), evaluation of suspect sources, evaluation of alternative/enhancement technologies, and initial development of remediation goals. In particular, the most recent A/M vadose zone remediation support activities (described in WSRC-RP-97-109) were completed and the results provide key documentation about system performance

Neutron capture cross section measurements of $^{238}$U, $^{241}$Am and $^{243}$Am at n_TOF

CERN Multimedia

Koehler, P E; Plag, R

The increase of the world energy demand and the need of low carbon energy sources have triggered the renaissance and/or enhancement of nuclear energy in many countries. Fundamental nuclear physics can contribute in a practical way to the sustainability and safety of the nuclear energy production and the management of the nuclear waste. There exists a series of recent studies which address the most relevant isotopes, decay data, nuclear reaction channels and energy ranges which have to be investigated in more detail for improving the design of different advanced nuclear systems [1] and nuclear fuel cycles [2]. In this proposal, we aim at the measurement of the neutron capture cross sections of $^{238}$U, $^{241}$Am and $^{243}$Am. All three isotopes are listed in the NEA High Priority Request List [37], are recommended for measurements [1] and play an important role in the nuclear energy production and fuel cycle scenarios. The measurements will provide as well valuable nuclear structure data necessary for the...

Senior Senator from Florida and Chairman, Senate Committee on Space, Aeronautics and Related Sciences W. Nelson, visiting the ATLAS cavern and LHC tunnel with ATLAS Collaboration Spokesperson P. Jenni and AMS Collaboration Spokesperson S.C.C.Ting, 16 March 2008.

CERN Multimedia

Maximilien Brice

2008-01-01

Senior Senator from Florida and Chairman, Senate Committee on Space, Aeronautics and Related Sciences W. Nelson, visiting the ATLAS cavern and LHC tunnel with ATLAS Collaboration Spokesperson P. Jenni and AMS Collaboration Spokesperson S.C.C.Ting, 16 March 2008.

Bioremoval of Am-241 and Cs-137 from liquid radioactive wasters by bacterial consortiums; Biorremocao de Am-241 e Cs-137 de rejeitos radioativos liquidos por consorcios bacterianos

Energy Technology Data Exchange (ETDEWEB)

Ferreira, Rafael Vicente de Padua; Lima, Josenilson B. de; Gomes, Mirella C.; Borba, Tania R.; Bellini, Maria Helena; Marumo, Julio Takehiro; Sakata, Solange Kazumi, E-mail: rpadua@ipen.b, E-mail: sksakata@ipen.b, E-mail: jblima@ipen.b, E-mail: mbmarumo@ipen.b, E-mail: jtmarumo@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

2011-10-26

This paper evaluates the capacity of two bacterial consortiums of impacted areas in removing the Am-241 and Cs-137 from liquid radioactive wastes.The experiments indicated that the two study consortiums were able to remove 100% of the Cs-137 and Am-241 presents in the waste from 4 days of contact. These results suggest that the bio removal with the selected consortiums, can be a viable technique for the treatment of radioactive wastes containing Am-241 and Cs-137

Various forms of organic and inorganic P fertilizers did not negatively affect soil- and root-inhabiting AM fungi in a maize-soybean rotation system.

Science.gov (United States)

Beauregard, M S; Gauthier, M-P; Hamel, C; Zhang, T; Welacky, T; Tan, C S; St-Arnaud, M

2013-02-01

Arbuscular mycorrhizal (AM) fungi are key components of most agricultural ecosystems. Therefore, understanding the impact of agricultural practices on their community structure is essential to improve nutrient mobilization and reduce plant stress in the field. The effects of five different organic or mineral sources of phosphorus (P) for a maize-soybean rotation system on AM fungal diversity in roots and soil were assessed over a 3-year period. Total DNA was extracted from root and soil samples collected at three different plant growth stages. An 18S rRNA gene fragment was amplified and taxa were detected and identified using denaturing gradient gel electrophoresis followed by sequencing. AM fungal biomass was estimated by fatty acid methyl ester analysis. Soil P fertility parameters were also monitored and analyzed for possible changes related with fertilization or growth stages. Seven AM fungal ribotypes were detected. Fertilization significantly modified soil P flux, but had barely any effect on AM fungi community structure or biomass. There was no difference in the AM fungal community between plant growth stages. Specific ribotypes could not be significantly associated to P treatment. Ribotypes were associated with root or soil samples with variable detection frequencies between seasons. AM fungal biomass remained stable throughout the growing seasons. This study demonstrated that roots and soil host distinct AM fungal communities and that these are very temporally stable. The influence of contrasting forms of P fertilizers was not significant over 3 years of crop rotation.

Correlation of PET and AMS analyses for early kinetics of 2-fluoro-2-deoxyglucose (FDG)

International Nuclear Information System (INIS)

Minamimoto, Ryogo; Hamabe, Yoshimi; Miyaoka, Teiji; Theeraladanon, Chumpol; Oka, Takashi; Matsui, Takao; Inoue, Tomio

2010-01-01

The draft of the guidelines for microdosing in clinical trials was published in Japan in 2008 following the guidelines of the European Medicines Agency (EMEA) and the Food and Drug Administration (FDA). It recommends utilizing accelerator mass spectrometry (AMS), liquid chromatography/mass spectrometry (LC/MS/MS), and positron emission tomography (PET) for monitoring drug metabolites in preclinical studies. In this study, we clarified the correlation in measuring result between PET and AMS. The AMS measurement was undergone by using AMS system of Institute of Accelerator Analysis Ltd. (IAA, Kawasaki, Japan). First the back ground 14 C level of blood in mice was measured by AMS. Second, we clarified the relationship between AMS and PET by using 2-fluoro-2-deoxyglucose (FDG). The correlation coefficient (r) of the measurements using PET ( 18 F-FDG) and AMS ( 14 C-FDG) were quite high at 0.97 (Y = 7.54E - 05X + 0.02, p 18 F-FDG was nearly identical with that of 14 C-FDG. These results indicate that the AMS analysis has excellent correlation with the PET method.

Correlation of PET and AMS analyses for early kinetics of 2-fluoro-2-deoxyglucose (FDG)

Science.gov (United States)

Minamimoto, Ryogo; Hamabe, Yoshimi; Miyaoka, Teiji; Theeraladanon, Chumpol; Oka, Takashi; Matsui, Takao; Inoue, Tomio

2010-04-01

The draft of the guidelines for microdosing in clinical trials was published in Japan in 2008 following the guidelines of the European Medicines Agency (EMEA) and the Food and Drug Administration (FDA). It recommends utilizing accelerator mass spectrometry (AMS), liquid chromatography/mass spectrometry (LC/MS/MS), and positron emission tomography (PET) for monitoring drug metabolites in preclinical studies. In this study, we clarified the correlation in measuring result between PET and AMS. The AMS measurement was undergone by using AMS system of Institute of Accelerator Analysis Ltd. (IAA, Kawasaki, Japan). First the back ground 14C level of blood in mice was measured by AMS. Second, we clarified the relationship between AMS and PET by using 2-fluoro-2-deoxyglucose (FDG). The correlation coefficient ( r) of the measurements using PET ( 18F-FDG) and AMS ( 14C-FDG) were quite high at 0.97 ( Y = 7.54 E - 05 X + 0.02, p blood clearance profile of 18F-FDG was nearly identical with that of 14C-FDG. These results indicate that the AMS analysis has excellent correlation with the PET method.

Aluminum metabolism studied by [sup 26]Al tracer using AMS technique

Energy Technology Data Exchange (ETDEWEB)

Kobayashi, Koichi (Tokyo Univ. (Japan). Research Center for Nuclear Science and Technology); Yumoto, Sakae; Nagai, Hisao; Hosoyama, Yoshiyuki; Imamura, Mineo; Hotta, Masayoshi; Ohashi, Hideo

1992-01-01

By accelerator mass spectrometry (AMS), we studied aluminum metabolism using [sup 26]Al as a tracer. To investigate the role of aluminum toxicity in the etiology of amyotrophic lateral sclerosis (ALS) and Alzheimer's disease, aluminum incorporation into the rat cerebrum was studied. When healthy rats were injected intraperitoneally with [sup 26]Al, a considerable amount of the tracer was incorporated into the brain within only 5 days after the injection. This [sup 26]Al accumulation was apparently irreversible, since it persisted even after 75 days. (author).

Medidas de selectividad y sensibilidad en un receptor de AM simplificado

OpenAIRE

Przylecki Siwek, Maciej

2011-01-01

Se describen las medidas de selectividad y sensibilidad de un receptor de AM simplificado que sólo dispone de una etapa detectora formada por antena de ferrita y un transistor BJT npn polarizado en zona no líneal actuando como un amplificador de clase B. La señal detectada se preamplifica y finalmente se lleva a un amplificador de audio de circuito integrado y al altavoz. Debido a la sencillez la selectividad es variable con la frecuencia de sintonía proporcionando a 392 KHz un...

Review of fission product yields and delayed neutron data for the actinides NP-237, PU-242, AM-242M, AM-243, CM-243 and CM-245

International Nuclear Information System (INIS)

Mills, R.W.

1990-07-01

A review of fission product yields and delayed neutron data for Np-237, Pu-242, Am-242m, Am-243, Cm-243 and Cm-245 has been undertaken. Gaps in understanding and inconsistencies in existing data were identified and priority areas for further experimental, theoretical and evaluation investigation detailed

América Latina después de las transiciones: calidad de la democracia, nuevo desarrollo y equidad proactiva

Directory of Open Access Journals (Sweden)

Rodrigo Arocena

2014-06-01

Full Text Available El artículo parte de la década de los ochenta, necesaria para una transición progresiva de ciertos regímenes dictatoriales a las nuevas democracias, para analizar la solidez de la democracia en América Latina, los nuevos procesos de crecimiento económico y la justicia social que late (o no bajo los mismos.

América en los manuales escolares españoles de historia (1900-1940: trayectória de una investigación

Directory of Open Access Journals (Sweden)

Luciana Oliveira Correia

2012-10-01

Full Text Available El texto que presentamos, es el relato de la búsqueda y análisis que hemos realizado en losmanuales de Historia españoles de la Enseñanza Secundaria con el objetivo de comprender losvínculos didáctico-pedagógicos del contenido sobre América presentes en la enseñanza de laHistoria. A través de la técnica de Análisis de Contenido hemos explorado los manualeseditados en las cuatro primeras décadas del siglo XX, para conocer en que partes delcontenido se localiza la temática América y desde cuales expresiones claves se centra lanarrativa; como los términos utilizados para hablar sobre América van evolucionando a lolargo del contenido del libro texto y a lo largo de los años en las publicaciones; yprincipalmente cual es el sentido de América para currículo de Historia Español.

Amérique latine et Caraïbes | CRDI - Centre de recherches pour le ...

International Development Research Centre (IDRC) Digital Library (Canada)

Nos projets qui tirent parti des connaissances régionales et mondiales renforcent notre quête de solutions durables. Quel est notre but ? La viabilité à long terme du développement en Amérique latine et dans les Caraïbes par la croissance économique, l'accès équitable aux services de soins de santé et sociaux, des ...

Investigation for rapid measurement of radio strontium in environment by AMS

International Nuclear Information System (INIS)

Satou, Yukihiko; Sueki, Keisuke; Sasa, Kimikazu; Takahashi, Tsutomu; Matsuzaki, Hiroyuki

2013-01-01

This proceeding described that investigation of applies AMS to "9"0Sr measurement in environmental samples. Conventional method for measurement of "9"0Sr takes longer time. However, "9"0Sr-AMS is not required complex chemical separation and longer times due to not counting decay signals. It will be produce good results for case of emergency and routine monitoring. This project has already launched and carries it out by plan for three years. "9"0Sr-AMS involves two major barriers, but it will be expect that solve by improved equipment and new accelerator in the University of Tsukuba. (author)

The Alpha Magnetic Spectrometer (AMS) experiment on the International Space Station

Energy Technology Data Exchange (ETDEWEB)

Alpat, Behcet E-mail: behcet.alpat@pg.infn.it

2001-04-01

The Alpha Magnetic Spectrometer (AMS) is a detector designed to operate in space to search for antimatter components in cosmic ray, the annihilation products of darkmatter and to study the antiprotons, positrons and light nuclei. A 'baseline' version of the experiment has successfully completed the precursor flight on Space Shuttle Discovery (June 2-12, 1998). The complete AMS is programmed for installation on International Space Station in year 2003 for an operational period of 3 years. In this contribution we report on the experimental configuration of AMS that will be installed on International Space Station.

Accumulation and release of 241Am by a macrophyte of the Yenisei River (Elodea canadensis)

International Nuclear Information System (INIS)

Bolsunovsky, A.; Zotina, T.; Bondareva, L.

2005-01-01

The source of radioactive contamination of the Yenisei River floodplain, including contamination with transuranic elements, is the Mining-and-Chemical Combine of the Russian Ministry of Atomic Energy, which has for many years been producing weapons-grade plutonium. Transuranic elements have been detected not only in the soil and sediment of the river but also in the biomass of aquatic plants. This work is an investigation of accumulation and release of 241 Am by a submerged macrophyte of the Yenisei River (Elodea canadensis) in laboratory experiments. In 2000-2003, laboratory experiments were carried out with biomass of E. canadensis Mich. and filtered river water. The samples were collected from the Yenisei River upstream of the discharge of the Combine's radioactive effluent. The experiments showed that 241 Am is accumulated by Elodea biomass: the activity concentration of 241 Am can reach 3280 ± 240 Bq/g, with the concentration factor for 241 Am 16 600 ± 2200 l/kg. Results of chemical fractionation have proved that in the course of 241 Am accumulation by Elodea biomass, 241 Am tightly bound to biomass increases from 11% to 27% of the total 241 Am in the biomass. Release of 241 Am from the decaying Elodea biomass has been evaluated experimentally. By the end of the experiment (lasting up to 127 days), the Elodea plants had lost up to 65% of their initial 241 Am activity and the rate of 241 Am release into the water environment reached 23 Bq/day

Accumulation and release of 241Am by a macrophyte of the Yenisei River (Elodea canadensis).

Science.gov (United States)

Bolsunovsky, A; Zotina, T; Bondareva, L

2005-01-01

The source of radioactive contamination of the Yenisei River floodplain, including contamination with transuranic elements, is the Mining-and-Chemical Combine of the Russian Ministry of Atomic Energy, which has for many years been producing weapons-grade plutonium. Transuranic elements have been detected not only in the soil and sediment of the river but also in the biomass of aquatic plants. This work is an investigation of accumulation and release of 241Am by a submerged macrophyte of the Yenisei River (Elodea canadensis) in laboratory experiments. In 2000-2003, laboratory experiments were carried out with biomass of E. canadensis Mich. and filtered river water. The samples were collected from the Yenisei River upstream of the discharge of the Combine's radioactive effluent. The experiments showed that 241Am is accumulated by Elodea biomass: the activity concentration of 241Am can reach 3280+/-240 Bq/g, with the concentration factor for 241Am 16 600+/-2200l/kg. Results of chemical fractionation have proved that in the course of 241Am accumulation by Elodea biomass, 241Am tightly bound to biomass increases from 11% to 27% of the total 241Am in the biomass. Release of 241Am from the decaying Elodea biomass has been evaluated experimentally. By the end of the experiment (lasting up to 127 days), the Elodea plants had lost up to 65% of their initial 241Am activity and the rate of 241Am release into the water environment reached 23 Bq/day.

La planification inclusive : un moyen d'améliorer les services d ...

International Development Research Centre (IDRC) Digital Library (Canada)

23 mai 2013 ... Grâce à ce projet, 718 ménages ont obtenu un meilleur accès à de l'eau, et 21 % des foyers ont bénéficié d'une amélioration de leurs appareils de plomberie. Les résidents ont pris part à la gestion technique du système et à son administration. Le système de facturation a aussi été remanié de sorte qu'à la ...

Measurement of contamination by 241Am

International Nuclear Information System (INIS)

Hemmingsen, L.B.S.

1991-08-01

In relation to the fact that four employees at the Danish Isotope Center who had regularly cleaned the smoke detectors used for control measurements were found to be contaminated with 241 Am, the aim was to investigate the suitability of the Phoswich detector system for measurement of contamination of humans by 241 Am. It was also wished to compare this measuring method with other selected ones. The measurement results are presented in detail. It was found that measurements taken on the cranium with the Phoswich detectors were more suitable for measurement of contamination by 241 Am than the use of a Ge detector on the liver, - because of the first-named method's greater degree of measuring efficiency, (0.013 cps/Bq compared with 0.0001 cps/Bq in the case of Ge detector measurement) and lower minimum detectable activity in relation to that activity that was measured on A1 (one of the employees). It was found that Phoswich-detector measurement and measuring of urine samples supplemented each other in a satisfactory way. The Phoswich detector enables a quick measurement of the degree of seriousness of the contamination of a person and a relatively accurate determination of the calculated intake of contamination which has a size of at least twice the annual limit of intake size. Measurements of urine samples enable smaller amounts of contamination to be revealed, but this takes ca. 32 weeks and is less accurate than Phoswich measurement especially if a long time has elapsed after the intake. (AB) (34 refs.)

Radiochemical determination of the neutron capture cross sections of {sup 241}Am irradiated in the JMTR reactor

Energy Technology Data Exchange (ETDEWEB)

Shinohara, N.; Hatsukawa, Y.; Hata, K.; Kohno, N. [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

1997-03-01

The thermal neutron capture cross section {sigma}{sub 0} and Resonance integral I{sub 0} of {sup 241}Am leading to the production of {sup 242m}Am and {sup 242g}Am were measured by radiochemical method. The cross sections obtained in this study are {sigma}{sub 0}=60.9 {+-} 2.6 barn, I{sub 0}=213 {+-} 13 barn for {sup 241}Am(n,{gamma}){sup 242m}Am and {sigma}{sub 0}=736 {+-} 31 barn, I{sub 0}=1684 {+-} 92 barn for {sup 241}Am(n,{gamma}){sup 242g}Am. (author)

Pluralidade da representação na América Latina

Directory of Open Access Journals (Sweden)

Maria da Glória Gohn

2014-04-01

Full Text Available Este texto destaca formas de ações coletivas civis organizadas em movimentos sociais ou redes sociais que participam de programas e projetos sociais institucionalizados na América Latina, com destaque para o caso brasileiro na última década. As questões investigadas são: Quem são os atores sociais que protagonizam essas ações associativas? Que público e demandas representam? Que impactos essas demandas geraram na sociedade e no poder público? Que respostas elas têm obtido? Ao final, desenvolvem-se algumas considerações sobre as manifestações sociais ocorridas em junho de 2013 no Brasil, no contexto dos cenários apresentados ao longo do texto.

Friction stir welded AM50 and AZ31 Mg alloys: Microstructural evolution and improved corrosion resistance

Energy Technology Data Exchange (ETDEWEB)

Templeman, Yael [Department of Materials Engineering, Ben Gurion University of the Negev, PO Box 653, Beer Sheva 84105 (Israel); Ben Hamu, Guy [Department of Mechanical Engineering, Sami Shamoon College of Engineering, Ashdod 77245 (Israel); Meshi, Louisa, E-mail: Louisa@bgu.ac.il [Department of Materials Engineering, Ben Gurion University of the Negev, PO Box 653, Beer Sheva 84105 (Israel)

2017-04-15

One of the major drawbacks of Mg alloys is poor weldability, caused by porosity formation during conventional fusion welding processes. Friction Stir Welding (FSW) is promising technique in this context since it is a solid state technique. Contradicting results were published in the literature regarding the FSWed Mg alloys joint's properties. Current research was performed in order to investigate the microstructure and corrosion properties of FSWed Mg alloys, studying representatives of two commercial families: wrought AZ31-H24 and die cast AM50. It was found that in both alloys recrystallization occurred during the FSW. In AM50 the mechanism of the recrystallization was continuous, manifested by dislocation rearrangement into sub grain boundaries. In AZ31 discontinuous recrystallization had occurred through grain boundaries migration - twins rotated with respect to the matrix, turning into low angle grain boundaries. Corrosion resistance has improved during the FSW in both alloys to different extents. In the AM50 alloy, the nugget exhibited significantly higher surface potential than the base metal mainly due to the higher Al concentration in the matrix of the nugget, resulting from the dissolution of Al-enrichment and β-Mg{sub 17}Al{sub 12} phase. In the AZ31 alloy, no change in Al concentration had occurred, and the surface potential measured in the nugget was only slightly higher than in the base metal. These results underline the appropriateness of the FSW for Mg alloys since during the conventional welding deterioration of the corrosion resistance occurs. - Highlights: • Following FSW, AZ31-H24 experienced discontinuous recrystallization. • In AZ31 grain boundaries migration occurred, thus twins rotated. • In die cast AM50 continuous recrystallization occurred during the FSW. • In AM50 - dislocations rearranged into sub grain boundaries. • Corrosion resistance has improved during the FSW in both alloys to different extent.

Friction stir welded AM50 and AZ31 Mg alloys: Microstructural evolution and improved corrosion resistance

International Nuclear Information System (INIS)

Templeman, Yael; Ben Hamu, Guy; Meshi, Louisa

2017-01-01

One of the major drawbacks of Mg alloys is poor weldability, caused by porosity formation during conventional fusion welding processes. Friction Stir Welding (FSW) is promising technique in this context since it is a solid state technique. Contradicting results were published in the literature regarding the FSWed Mg alloys joint's properties. Current research was performed in order to investigate the microstructure and corrosion properties of FSWed Mg alloys, studying representatives of two commercial families: wrought AZ31-H24 and die cast AM50. It was found that in both alloys recrystallization occurred during the FSW. In AM50 the mechanism of the recrystallization was continuous, manifested by dislocation rearrangement into sub grain boundaries. In AZ31 discontinuous recrystallization had occurred through grain boundaries migration - twins rotated with respect to the matrix, turning into low angle grain boundaries. Corrosion resistance has improved during the FSW in both alloys to different extents. In the AM50 alloy, the nugget exhibited significantly higher surface potential than the base metal mainly due to the higher Al concentration in the matrix of the nugget, resulting from the dissolution of Al-enrichment and β-Mg 17 Al 12 phase. In the AZ31 alloy, no change in Al concentration had occurred, and the surface potential measured in the nugget was only slightly higher than in the base metal. These results underline the appropriateness of the FSW for Mg alloys since during the conventional welding deterioration of the corrosion resistance occurs. - Highlights: • Following FSW, AZ31-H24 experienced discontinuous recrystallization. • In AZ31 grain boundaries migration occurred, thus twins rotated. • In die cast AM50 continuous recrystallization occurred during the FSW. • In AM50 - dislocations rearranged into sub grain boundaries. • Corrosion resistance has improved during the FSW in both alloys to different extent.

Developments towards a fully automated AMS system

International Nuclear Information System (INIS)

Steier, P.; Puchegger, S.; Golser, R.; Kutschera, W.; Priller, A.; Rom, W.; Wallner, A.; Wild, E.

2000-01-01

The possibilities of computer-assisted and automated accelerator mass spectrometry (AMS) measurements were explored. The goal of these efforts is to develop fully automated procedures for 'routine' measurements at the Vienna Environmental Research Accelerator (VERA), a dedicated 3-MV Pelletron tandem AMS facility. As a new tool for automatic tuning of the ion optics we developed a multi-dimensional optimization algorithm robust to noise, which was applied for 14 C and 10 Be. The actual isotope ratio measurements are performed in a fully automated fashion and do not require the presence of an operator. Incoming data are evaluated online and the results can be accessed via Internet. The system was used for 14 C, 10 Be, 26 Al and 129 I measurements

NIKHEF: AmPS of electron beam

International Nuclear Information System (INIS)

Anon.

1992-01-01

Now operational at the Dutch National Institute for Nuclear Physics and High Energy Physics (NIKHEF), Amsterdam, is a new tool for studying the electromagnetic properties of nuclei. Called AmPS - Amsterdam pulse stretcher - this ring provides experiments with a smoother, almost continuous supply of electrons

Ultraviolet observations of AM Herculis

International Nuclear Information System (INIS)

Tanzi, E.G.; Treves, A.; Milan Univ.; Sandford, M.C.W.; Willis, A.J.; Wilson, R.

1980-01-01

Seven ultraviolet spectra (1100-3200 Angstroem) of AM Her were obtained with the low resolution spectrometer of the IUE satellite. Strong emission features appear superimposed on a well defined continuum which is well fitted by a Fsub(lambda) D lambda -2 law. The observations are compared with the expectations from models of the source. (orig.) 891 WL/orig. 892 HIS

Potentiostatic electro-deposition of 241Am using room temperature ionic liquids

International Nuclear Information System (INIS)

Sankhe, R.H.; Mirashi, N.N.; Arijit Sengupta; Murali, M.S.

2015-01-01

An attempt was made for the potentiostatic electrodeposition of 241 Am using six different room temperature ionic liquids (RTILs). Effect of electrodeposition time on the % of electrodeposition of 241 Am, pH change of the solution and the temperature change of the systems were investigated. It was observed that for water immiscible RTILs, the least viscous RTIL gave the best yield (when mixed with iso-propanol), while for water miscible RTILs, reverse trend was observed (when mixed with water). Out of all water immiscible RTILs under consideration for the present case, the octyl-methyl-pyrrolidinium bis(trifluoromethylsulfonyl)imide (C 8 mpyNTf 2 ) in isopropanol was found to yield almost quantitative (99.6 %) electrodeposition of 241 Am within 45 min whereas the most effective system was found to be C 8 mimBr with ∼90 % of 241 Am deposited on the electrode for water miscible RTILs. To the best of our knowledge, this is the first approach ever been reported in the literature. (author)

Recent advances in AM OLED technologies for application to aerospace and military systems

Science.gov (United States)

Sarma, Kalluri R.; Roush, Jerry; Chanley, Charles

2012-06-01

While initial AM OLED products have been introduced in the market about a decade ago, truly successful commercialization of OLEDs has started only a couple of years ago, by Samsung Mobile Display (SMD), with small high performance displays for smart phone applications. This success by Samsung has catalyzed significant interest in AM OLED technology advancement and commercialization by other display manufacturers. Currently, significant manufacturing capacity for AM OLED displays is being established by the industry to serve the growing demand for these displays. The current development in the AM OLED industry are now focused on the development and commercialization of medium size (~10") AM OLED panels for Tablet PC applications and large size (~55") panels for TV applications. This significant progress in commercialization of AM OLED technology is enabled by major advances in various enabling technologies that include TFT backplanes, OLED materials and device structures and manufacturing know-how. In this paper we will discuss these recent advances, particularly as they relate to supporting high performance applications such as aerospace and military systems, and then discuss the results of the OLED testing for aerospace applications.

Correlation of PET and AMS analyses for early kinetics of 2-fluoro-2-deoxyglucose (FDG)

Energy Technology Data Exchange (ETDEWEB)

Minamimoto, Ryogo, E-mail: ryogom@yokohama-cu.ac.j [Department of Radiology, Graduate School of Medicine, Yokohama City University, Yokohama (Japan); Hamabe, Yoshimi; Miyaoka, Teiji [Institute of Accelerator Analysis (IAA) Ltd., Kawasaki (Japan); Theeraladanon, Chumpol; Oka, Takashi [Department of Radiology, Graduate School of Medicine, Yokohama City University, Yokohama (Japan); Matsui, Takao [Institute of Accelerator Analysis (IAA) Ltd., Kawasaki (Japan); Inoue, Tomio [Department of Radiology, Graduate School of Medicine, Yokohama City University, Yokohama (Japan)

2010-04-15

The draft of the guidelines for microdosing in clinical trials was published in Japan in 2008 following the guidelines of the European Medicines Agency (EMEA) and the Food and Drug Administration (FDA). It recommends utilizing accelerator mass spectrometry (AMS), liquid chromatography/mass spectrometry (LC/MS/MS), and positron emission tomography (PET) for monitoring drug metabolites in preclinical studies. In this study, we clarified the correlation in measuring result between PET and AMS. The AMS measurement was undergone by using AMS system of Institute of Accelerator Analysis Ltd. (IAA, Kawasaki, Japan). First the back ground {sup 14}C level of blood in mice was measured by AMS. Second, we clarified the relationship between AMS and PET by using 2-fluoro-2-deoxyglucose (FDG). The correlation coefficient (r) of the measurements using PET ({sup 18}F-FDG) and AMS ({sup 14}C-FDG) were quite high at 0.97 (Y = 7.54E - 05X + 0.02, p < 0.001). The blood clearance profile of {sup 18}F-FDG was nearly identical with that of {sup 14}C-FDG. These results indicate that the AMS analysis has excellent correlation with the PET method.

The Top-of-Instrument corrections for nuclei with AMS on the Space Station

Science.gov (United States)

Ferris, N. G.; Heil, M.

2018-05-01

The Alpha Magnetic Spectrometer (AMS) is a large acceptance, high precision magnetic spectrometer on the International Space Station (ISS). The top-of-instrument correction for nuclei flux measurements with AMS accounts for backgrounds due to the fragmentation of nuclei with higher charge. Upon entry in the detector, nuclei may interact with AMS materials and split into fragments of lower charge based on their cross-section. The redundancy of charge measurements along the particle trajectory with AMS allows for the determination of inelastic interactions and for the selection of high purity nuclei samples with small uncertainties. The top-of-instrument corrections for nuclei with 2 < Z ≤ 6 are presented.

Américo Negrette and Huntington's disease

Directory of Open Access Journals (Sweden)

Mariana Moscovich

2011-08-01

Full Text Available The authors present a historical review of the seminal clinical contribution of Professor Américo Negrette, a Venezuelan neurologist, to the evolution of scientific knowledge about Huntington's disease.

AmICog – mobile technologies to assist people with cognitive disabilities in the work place

Directory of Open Access Journals (Sweden)

Javier GÓMEZ

2014-03-01

Full Text Available This paper presents the system AmICog, designed specifically to assist people with cognitive disabilities in their workplaces. To do that we employ mobile devices for two different purposes: on the one hand, to show interactive guides adapted to the user, the task and the user’s context. On the other hand, to locate and provide directions in indoors environments.

Regionalismo, derechos humanos y democratización en América: La importancia del contexto

Directory of Open Access Journals (Sweden)

Laurence Whitehead

2008-01-01

conclusión general es que la convergencia en un régimen de derechos humanos efectivo y relevante para las Américas sólo cabe esperar que proceda de manera intermitente y desigual, aun en un continente plenamente democratizado. Los avances duraderos han de construirse socialmente, ajustarse a las ideas locales y fundarse en prácticas e intereses nacionales.

Expediciones marítimas: testimonio de la presencia española en América

Directory of Open Access Journals (Sweden)

Pilar del Campo Hernán

2016-08-01

De la presencia española en América, de su geografía y de su cultura se tiene constancia en nuestros archivos a través de los innumerables documentos que generaron las expediciones político-científicas y de límites realizadas desde el último tercio del siglo XVIII y a lo largo del siglo XIX.

Improvement of pre-treatment method for 36Cl/Cl measurement of Cl in natural groundwater by AMS

International Nuclear Information System (INIS)

Nakata, Kotaro; Hasegawa, Takuma

2011-01-01

Estimation of 36 Cl/Cl by accelerator mass spectrometry (AMS) is a useful method to trace hydrological processes in groundwater. For accurate estimation, separation of SO 4 2- from Cl - in groundwater is required because 36 S affects AMS measurement of 36 Cl. Previous studies utilized the difference in solubility between BaSO 4 and BaCl 2 (BaSO 4 method) to chemically separate SO 4 2- from Cl - . However, the accuracy of the BaSO 4 method largely depends on operator skill, and consequently Cl - recovery is typically incomplete (70-80%). In addition, the method is time consuming (>1 week), and cannot be applied directly to dilute solutions. In this study, a method based on ion-exchange column chromatography (column method) was developed for separation of Cl - and SO 4 2- . Optimum conditions were determined for the diameter and height of column, type and amount of resin, type and concentration of eluent, and flow rate. The recovery of Cl - was almost 100%, which allowed complete separation from SO 4 2- . The separation procedure was short ( 4 methods, and then analyzed by AMS to estimate 36 S counts and 36 Cl/Cl values. 36 S counts in samples processed by the column method were stable and lower than those from the BaSO 4 method. The column method has the following advantages over the BaSO 4 method: (1) complete and stable separation of Cl - and SO 4 2- , (2) less operator influence on results, (3) short processing time ( - , and (5) concentration of Cl - and separation from SO 4 2- in the one system for dilute solutions.

RICH – A new AMS facility at the Royal Institute for Cultural Heritage, Brussels, Belgium

Energy Technology Data Exchange (ETDEWEB)

Boudin, Mathieu; Van Strydonck, Mark; Brande, Tess van den [Royal Institute for Cultural Heritage, Jubelpark 1, 1000 Brussels (Belgium); Synal, Hans-Arno; Wacker, Luckas [Laboratory of Ion Beam Physics, ETH Zurich, 8093 Zurich (Switzerland)

2015-10-15

Since 1989 the radiocarbon dating lab has their own graphitization system for {sup 14}C AMS dating but RICH (Royal Institute for Cultural Heritage) did not possess their own AMS and measurements were carried out in collaboration with other AMS facilities. In April 2013 the Micadas (Mini Carbon Dating System) AMS was installed at RICH in Brussels and after 1.5 year operation the high stability and performance of the Micadas can be demonstrated by repeated analyses of primary standard OXA II and secondary standards. Results of unknown samples measured on the RICH–Micadas and on other AMS systems are in good agreement.

AMS-02 in space: physics results, overview, and challenges

Science.gov (United States)

Tomassetti, Nicola; AMS Collaboration

2015-08-01

The Alpha Magnetic Spectrometer (AMS-02) is a state of the art particle detector measuring cosmic rays (CRs) on the International Space Station (ISS) since May 19th 2011. AMS-02 identifies CR leptons and nuclei in the energy range from hundreds MeV to few TeV per nucleon. Several sub-detector systems allow for redundant particle identification with unprecedented precision, a powerful lepton-hadron separation, and a high purity of the antimatter signal. The new AMS-02 leptonic data from 1 to 500 GeV are presented and discussed. These new data indicate that new sources of CR leptons need to be included to describe the observed spectra at high energies. Explanations of this anomaly may be found either in dark-matter particles annihilation or in the existence of nearby astrophysical sources of e±. Future data at higher energies and forthcoming measurements on the antiproton spectrum and the boron-to-carbon ratio will be crucial in providing the discrimination among the different scenario.

Physics of charged cosmic rays with the AMS experiment

Energy Technology Data Exchange (ETDEWEB)

Vialle, J.P

2001-01-01

The electrically charged cosmic rays contain very important information about the mechanisms of stars and galaxies and about primordial universe which cannot be found elsewhere. The AMS experiment aims at searching for primordial antimatter, non-baryonic dark matter, and at measuring with high statistics and high accuracy the electrically charged cosmic ray particles and light nuclei in the extraterrestrial space beyond the atmosphere. AMS is the first magnetic spectrometer which will be flown in space. It will be installed for 3 years on the international space station (ISS) in 2003. A test flight with the space shuttle DISCOVERY took place in June 1998 with a first detector and gave many results: best limit on the existence of antinuclei, fluxes of protons, leptons, and helium nuclei above the geomagnetic threshold, existence of a secondary flux below the geomagnetic threshold. These results are described below. The physics goal and perspectives for AMS on the space station with an improved detector are described as well. (author)

Characterization of strong (241)Am sources.

Science.gov (United States)

Vesterlund, Anna; Chernikova, Dina; Cartemo, Petty; Axell, Kåre; Nordlund, Anders; Skarnemark, Gunnar; Ekberg, Christian; Ramebäck, Henrik

2015-05-01

Gamma ray spectra of strong (241)Am sources may reveal information about the source composition as there may be other radioactive nuclides such as progeny and radioactive impurities present. In this work the possibility to use gamma spectrometry to identify inherent signatures in (241)Am sources in order to differentiate sources from each other, is investigated. The studied signatures are age, i.e. time passed since last chemical separation, and presence of impurities. The spectra of some sources show a number of Doppler broadened peaks in the spectrum which indicate the presence of nuclear reactions on light elements within the sources. The results show that the investigated sources can be differentiated between by age and/or presence of impurities. These spectral features would be useful information in a national nuclear forensics library (NNFL) in cases when the visual information on the source, e.g. the source number, is unavailable. Copyright © 2015 Elsevier Ltd. All rights reserved.

The AMS-02 transition radiation detector

CERN Document Server

Kirn, Th

2004-01-01

The Alpha Magnetic Spectrometer AMS02 will be equipped with a large transition radiation detector (TRD) to achieve a proton background suppression necessary for dark matter searches. The AMS02 TRD consists of 20 layers of fleece radiator each with Xe/CO//2 proportional wire straw tubes read out by a dedicated low-power data- acquisition system. A space-qualified TRD design will be presented. The performance of a 20-layer prototype was tested at CERN with electron, myon and pion beams up to l00 GeV and with protons up to 250 GeV. The beam-test results will be compared to Geant3 MC predictions. The detector is under construction at RWTH Aachen; the gas system will be built at MIT, slow-control at MIT and INFN Rome and DAQ at TH Karlsruhe. This project is funded by the German Space Agency DLR, the US Department of Energy DOE and NASA.

Precise measurement of the neutron capture reaction 54Fe(n,γ)55Fe via AMS

International Nuclear Information System (INIS)

Wallner, A; Buczak, K; Forstner, O; Golser, R; Kutschera, W; Lederer, C; Priller, A; Steier, P; Belgya, T; Szentmiklosi, L; Bichler, M; Coquard, L; Dillmann, I; Kaeppeler, F; Mengoni, A; Reifarth, R

2010-01-01

The measurement of cross sections relevant to nuclear astrophysics has become one main research topic at the VERA (Vienna Environmental Research Accelerator) facility. The technique applied, accelerator mass spectrometry (AMS), offers excellent sensitivity for the detection of long-lived radionuclides through ultra-low isotope ratio measurements. We discuss the potential and preliminary results of ongoing precision measurements of neutron-capture cross sections of 54 Fe. Such measurements might help to clarify the recently found discrepancy of s-process nucleosynthesis at lower-mass nuclei (A 55 Fe (t 1/2 = 2.72 yr) was analyzed using AMS. At VERA, detection of 55 Fe was developed with a reproducibility of about 1%, which makes the 54 Fe(n,γ) 55 Fe reaction a precise and unique laboratory measurement, which can serve as a reference to complementary techniques. In this regard a new 55 Fe standard for AMS measurements was produced. The final cross-section data are expected to be accurate to better than 3%. We report a preliminary, however, already significantly improved thermal neutron cross section value of (2.32 ± 0.10) barn, and a value of (6.3 ± 0.6) mbarn for E n = (520 ± 50) keV.

Double-moment cloud microphysics scheme for the deep convection parameterization in the GFDL AM3

Science.gov (United States)

Belochitski, A.; Donner, L.

2014-12-01

A double-moment cloud microphysical scheme originally developed by Morrision and Gettelman (2008) for the stratiform clouds and later adopted for the deep convection by Song and Zhang (2011) has been implemented in to the Geophysical Fluid Dynamics Laboratory's atmospheric general circulation model AM3. The scheme treats cloud drop, cloud ice, rain, and snow number concentrations and mixing ratios as diagnostic variables and incorporates processes of autoconversion, self-collection, collection between hydrometeor species, sedimentation, ice nucleation, drop activation, homogeneous and heterogeneous freezing, and the Bergeron-Findeisen process. Such detailed representation of microphysical processes makes the scheme suitable for studying the interactions between aerosols and convection, as well as aerosols' indirect effects on clouds and their roles in climate change. The scheme is first tested in the single column version of the GFDL AM3 using forcing data obtained at the U.S. Department of Energy Atmospheric Radiation Measurment project's Southern Great Planes site. Scheme's impact on SCM simulations is discussed. As the next step, runs of the full atmospheric GCM incorporating the new parameterization are compared to the unmodified version of GFDL AM3. Global climatological fields and their variability are contrasted with those of the original version of the GCM. Impact on cloud radiative forcing and climate sensitivity is investigated.

Türkiye’de Üretilen Çam Balının Kimyasal Profili

Directory of Open Access Journals (Sweden)

Serap B. Çınar

2015-02-01

Full Text Available Toplam 100 çam balı örneğinin kimyasal bileşimi ve elektriksel iletkenliği belirlenmiştir. Bal örnekleri Muğla ilindeki 9 farklı yöreden 2006, 2007 ve 2008 sezonunda toplanmıştır. Bulgulara göre çam balı örnekleri %14.40-16.80 su, %25.97-36.38 fruktoz ve %18.97-35.10 glukoz içermektedir. Fruktoz/glukoz oranı 1.01-1.44 arasında değişmektedir. Balın başat mineral bileşeni 1236-2554 mg/kg ile potasyumdur ve onu magnezyum (40.1-77.4 mg/kg, kalsiyum (25.6-93.6 mg/kg ve sodyum (19.6-99.6 mg/kg izlemektedir. K/Na oranı 21.2-80.9 arasındadır. Elektriksel iletkenlik ise 0.82-1.82 mS/cm arasında değişmektedir. Çam balının toplam asitliği 17.98-35.59 meq/kg, prolin miktarı ise 301-977 mg/kg arasında bulunmuştur. Hasat yılına göre örneklerin glukoz, sakkaroz ve maltoz miktarı ile elektriksel iletkenliği arasındaki farklar istatistik olarak önemli (P>0.01 bulunmuştur. Buna karşılık nem, fruktoz, kül, potasyum, magnezyum, kalsiyum, sodyum, prolin miktarı ve ayrıca toplam asitlik açısından farklar hasat yılına göre önemli değildir (P<0.01.