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Sample records for chorisia speciosa st

  1. Anatomical alterations in plants of Chorisia speciosa A. St.-Hil submitted to flooding

    OpenAIRE

    Bianchini, E; Medri, ME; Pimenta, JA; Giloni, PC; Kolb, RM; Correa, GT

    2000-01-01

    An experiment was carried out in order to study the morpho-anatomical responses of plants of Chorisia speciosa to flooding. Plants were maintained in well-drained and flooded soils for 45 days. The flooded plants grew less than the control and formed a great number of hypertrophied lenticels. Flooding caused death of part of the original roots and the remaining roots exhibited low regeneration capacity. The stem base of flooded plants showed a thicker cortex, narrower vessel members and a low...

  2. Respostas morfológicas e anatômicas de plantas jovens de Chorisia speciosa A. St.-Hil. (Bombacaceae sob condições de alagamento - DOI: 10.4025/actascibiolsci.v27i3.1277 Morphological and anatomical responses of young plants of Chorisia speciosa A. St. Hil. (Bombacaceae under flood conditions - DOI: 10.4025/actascibiolsci.v27i3.1277

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    Khátia Socorro Mathias Mourão

    2005-03-01

    Full Text Available O objetivo deste trabalho foi o de analisar algumas características morfológicas e anatômicas em plantas jovens de Chorisia speciosa, cultivadas em condições de solo drenado (controle e sob alagamento do solo. O experimento foi desenvolvido em casa de vegetação, utilizando-se plantas com 90 dias após a emergência, sendo alagadas por 30, 60 e 100 dias. Foram realizados cortes de material fresco e fixado à mão livre e em micrótomo e corados segundo técnicas usuais em anatomia vegetal. Na base do caule, após 30 dias de alagamento, ocorreu hipertrofia de lenticelas. Aos 60 dias, ocorreu o desenvolvimento de raízes adventícias, com espaços intercelulares no córtex e ausência de pêlos absorventes. Com 100 dias, surgiram folhas novas. As alterações anatômicas provocadas pelo alagamento no sistema radical principal foram os seguintes: início de deterioração no meristema apical após 60 dias de estresse; colapso e irregularidade na forma das células do córtex e cilindro central, em 30, 60 dias de experimentoThis work studied the morphological and anatomical characteristics in young plants of Chorisia speciosa, cultivated under drained soil and flood conditions (control. The experiment was developed in a greenhouse, using plants with 90 days after the emergency, submitted under flood conditions by 30, 60 and 100 days. Sections in different planes of fresh and fixed roots, stems bases and leaves, were made using standard procedures in vegetal anatomy. After 30 days of flooding, hypertrophic lenticels can be observed in the stem base and in 60 days, adventitious roots, with cellular space on the cortex and absence of root hair. With 100 days appeared new leaves. The anatomical response by flooding on the radical principal system were: beginning of deterioration on the apical meristem after 60 days of stress; collapse of cells and cells with irregular shape in the cortex and pith, in 30, 60 days of experiment

  3. Mitragyna speciosa

    Science.gov (United States)

    Halpenny, Genevieve M

    2017-09-14

    Mitragyna speciosa , also known as kratom, has the potential meet the need for pain medications that lack the addictiveness and overdose risk of classical opioid analgesics, such as morphine. This need is urgent because opioid addiction and overdose deaths have risen throughout diverse segments of U.S. society. Some opioid addicts have found relief in kratom preparations. The use of kratom as an analgesic has been validated by historical accounts and contemporary pharmacological research. Although kratom is a promising source of analgesic candidates, it is a euphoriant with potential for both abuse and addiction. However, kratom appears to be less addictive and to have milder withdrawal symptoms than opioid drugs. Thus, there is a need to balance the potential medical benefits and abuse of M. speciosa .

  4. Anticonvulsant Activity of Argyreia speciosa in Mice.

    Science.gov (United States)

    Vyawahare, N S; Bodhankar, S L

    2009-03-01

    Argyreia speciosa commonly known as Vridha daraka in Sanskrit is one of the important plants used in indigenous system of medicine. The root is regarded as an alternative tonic and useful in the diseases of nervous system. To confirm the veracity of aforementioned claim, we have evaluated the anticonvulsant effect of the extract. In this investigation, the mice were pretreated with different doses of Argyreia speciosa extract (100, 200, 400 mg/kg) for 10 days and then, they were subjected to either pentylenetetrazole (80 mg/kg) or maximal electroshock seizures (50 mA, 0.2 s) treatment. The hydroalcoholic extract of Argyreia speciosa at the dose of 200 and 400 mg/kg significantly delayed the latency to the onset of first clonus as well as onset of death in unprotected mice and exhibited protection in 16.66% and 33.33% of pentylenetetrazole treated mice respectively. Whereas in case of maximal electroshock-seizures, the dose of 200 and 400 mg/kg significantly reduced the duration of hind limb extension and both the doses were statistically found to be equipotent. The reference standards, clonazepam (0.1 mg/kg) and phenytoin (20 mg/kg) provided complete protection. Thus, present study revealed anticonvulsant effect of Argyreia speciosa against pentylenetetrazole- and maximal electroshock-induced convulsions in mice.

  5. Parkia speciosa Hassk.: A Potential Phytomedicine

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    Yusof Kamisah

    2013-01-01

    Full Text Available Parkia speciosa Hassk., or stink bean, is a plant indigenous to Southeast Asia. It is consumed either raw or cooked. It has been used in folk medicine to treat diabetes, hypertension, and kidney problems. It contains minerals and vitamins. It displays many beneficial properties. Its extracts from the empty pods and seeds have a high content of total polyphenol, phytosterol, and flavonoids. It demonstrates a good antioxidant activity. Its hypoglycemic effect is reported to be attributable to the presence of β-sitosterol, stigmasterol, and stigmast-4-en-3-one. The cyclic polysulfide compounds exhibit antibacterial activity, while thiazolidine-4-carboxylic acid possesses anticancer property. The pharmacological properties of the plant extract are described in this review. With ongoing research conducted on the plant extracts, Parkia speciosa has a potential to be developed as a phytomedicine.

  6. Visitantes florais de Erythrina speciosa Andr. (Leguminosae Flowering visitors of Erythrina speciosa Andr., Leguminosae

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    Maria J. Vitali-Veiga

    2000-06-01

    Full Text Available Inspite of Etythrina species exhibit morphologic attributes for adaptation to pollination by nectarivorous birds mentioned in the literature, E. speciosa is pollinated by lots of bees (Apinae and Meliponinae which show a great urban occurrence. Systems of E. speciosa floral reproduction, fenology, diversity, frequency and constancy of insects visiting at different hours and flowering periods were studied. E. speciosa is Biocompatible, but xenogamy is the predominant system of reproduction. A large diversity of insects visiting the inflorescences was observed, with predominance of bees. The bee species showed a higher frequency: Apis mellifera Linnaeus, 1758 (45,0 %, Trigona spinipes (Fabricius, 1793 (28,6%, Trigona hyalinata (Lepeletier, 1836 (12,2 % and the ant Zacryptoceruspusillus Klug, 1824 (2,8 %. Constant but not frequent were the bees (Apidae Plebeia droryana (Friese, 1900, Friesella schrottkyi (Friese, 1900, Nannotrigona testaceicornis (Lepeletier, 1836, Tetragonisca angustula (Latreille, 1811, the wasps (Vespidae Polybia paulista Ihering, 1896, Protopolybia exigua (de Saussure, 1854, Agelaia pallipes (Olivier. 1791, the ant (Formicidae Pseudomyrmex sp. and the beetle (Chrysomelidae Diabrotica speciosa (Germar, 1824. E. speciosa flowers were visited by hummingbirds (Trochilidae: Eupetomena macroura (Gmelin, 1788, Clorostilbon aureoventris (d'Orbigny & Lafresnaye, 1838 and Amazilia sp. The birds Passer domeslicus (Linnaeus, 1758 (Ploceidae and Coereba flaveola (Linnaeus, 1758 (Emberizidac, also are present. The frequency and insect distribution were influenced by ambiental factors. Temperature, light, time, barometric pressure, relative humidity and wind velocity were significantly correlated with insect numbers. There is a visit sequence, by floral resource disponibility during the day, conditioned by transport ability, insect numbers and colony necessity, which begins by A. mellifera followed by meliponid bees. These bees make the

  7. Alkaloids from flowers and leaves of Erythrina speciosa Andrews; Alcaloides de flores e folhas de Erythrina speciosa Andrews

    Energy Technology Data Exchange (ETDEWEB)

    Faria, Terezinha de Jesus; Cafeu, Mariana Carrara; Akiyoshi, Gisele; Ferreira, Dalva Trevisan; Galao, Olivio Fernandes; Andrei, Cesar Cornelio [Universidade Estadual de Londrina, PR (Brazil). Dept. de Quimica]. E-mail: tjfaria@uel.br; Pinge Filho, Phileno; Paiva, Manoel Ronaldo Carvalho [Universidade Estadual de Londrina, PR (Brazil). Dept. de Ciencias Patologicas; Universidade Estadual de Londrina, PR (Brazil). Dept. de Biologia Animal e Vegetal; Barbosa, Aneli de Melo [Universidade Estadual de Londrina, PR (Brazil). Dept. de Bioquimica; Braz-Filho, Raimundo [Universidade Estadual do Norte Fluminense, Campos dos Goytacazes, RJ (Brazil). Setor de Quimica de Produtos Naturais

    2007-05-15

    In vitro bioassays with leave extracts of Erythrina speciosa showed promising activity against Trypanosoma cruzi. From the flowers of E. speciosa two alkaloids were isolated: erysotrine and erythartine. The leaves furnished one alkaloid, nororientaline. The structures were determined on the basis of spectroscopic evidence. This is the first report about the investigation of alkaloids in flowers and leaves of this species, as well the first report of nororientaline occurrence in this plant. (author)

  8. Intrahepatic cholestasis following abuse of powdered kratom (Mitragyna speciosa).

    Science.gov (United States)

    Kapp, Friedrich G; Maurer, Hans H; Auwärter, Volker; Winkelmann, Martin; Hermanns-Clausen, Maren

    2011-09-01

    Kratom (Mitragyna speciosa) is a common medical plant in Thailand and is known to contain mitragynine as the main alkaloid. According to an increase in published reports and calls at German poison control centers, it has been used more frequently as a drug of abuse in the western hemisphere during the last couple of years. Despite this increase, reports of severe toxicity are rare within the literature. We describe a case of a young man who presented with jaundice and pruritus after intake of kratom for 2 weeks in the absence of any other causative agent. Alkaloids of M. speciosa were detected in the urine. While M. speciosa is gaining in popularity among illicit drug users, its adverse effects remain poorly understood. This is the first published case of intrahepatic cholestasis after kratom abuse.

  9. Effect of Eremomastax speciosa on experimantal diarrhoea | Oben ...

    African Journals Online (AJOL)

    This study investigated the anti diarrhoeal activity of the aqueous extract of dried ground leaves of Eremomastax speciosa (Hochst.) Acanthaceae. Diarrhea was induced in mice by the administration of 0.2 ml of castor oil, with the control group receiving water. The administration by oral garvage of 400 or 800 mg/kg body ...

  10. Development of microsatellite markers for Hancornia speciosa Gomes (Apocynaceae).

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    Rodrigues, A J L; Yamaguishi, A T; Chaves, L J; Coelho, A S G; Lima, J S; Telles, M P C

    2015-07-03

    Herein, we describe 34 microsatellite loci developed using an enrichment genomic library for the tree species Hancornia speciosa Gomes (Apocynaceae). Thirty-five individuals were genotyped using 34 primers to analyze the polymorphisms at each locus. The number of alleles per locus ranged from 4 to 20. The average number of alleles was 8.11, and the expected heterozygosity ranged from 0.62 to 0.94. These microsatellite primers will be useful in population genetics studies for this species.

  11. Visitantes florais de Lagerstroemia speciosa Pers: (Lythraceae Floral visitors in Lagerstroemia speciosa Pers: (Lythraceae

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    Maria de Jesus Vitali-Veiga

    1999-06-01

    Full Text Available Studies were carried out with Lagerstroemia speciosa Pers. on floral reproductive systems, diversity and constancy of visiting insects at different hours of day, the behaviour of these insects at the flowers and the influence of these environmental factors in relation to their visits. The fenology, anthesis and others particularity of this vegetal species was studied. A great diversity of insects was verified visiting the flowers with the predominance of bees. The most frequent and constant species encountered were: Nannotrigona testaceicornis (Lepeletier, 1836 (40,2%, Tetragonisca angustula (Latreille, 1811 (16,9%, Apis mellifera Linnaeus, 1758 (11,8%, Plebeia droryana (Friese, 1900 (9,1 % e Exomalopsis fulvofasciata (Smith, 1879 (8,5%. The blossoms possessis features of melittophily syndrome and diurnal anthesis. The environmental factors influence the insects foraging activity, mainly temperature, light, time of day, humidity and wind speed. The effective pollinators were the large insects like Bombus morio (Swederus, 1787, Bombus atratus (Franklin, 1913, Centris tarsata (Smith, 1874, Centris flavifrons Fabricius, 1775, Xylocopa suspecta Camargo & Moure, 1988, Xylocopa frontalis (Olivier, 1789 and Eulaema nigrita Lepeletier, 1841.

  12. Drying and osmotic conditioning in Hancornia speciosa Gomes seeds

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    Tathiana Elisa Masetto

    Full Text Available Hancornia speciosa is a native tree species of the Brazilian Cerrado whose seeds are desiccation sensitive. In this study, we aimed to evaluate drying and osmotic conditioning in H. speciosa seeds. We used fresh seeds with 48% moisture content, which were slowly dried until they attained contents of 20%, 15%, 10% and 5%. To evaluate osmotic conditioning, the seeds were imbibed in 12 mL osmotic solutions at 0.0; -0.2; -0.4 and -0.6 MPa for two days. After that, they were dehydrated until their original moisture content. The experiments were carried out in a completely randomized design with four repetitions with 50 seeds each. Reduction in moisture content from 20% to 5% decreased the physiological potential of seeds. H. speciosa seeds do not require osmotic priming with PEG solutions, because imbibition of seeds in osmotic solutions of up to -0.6 MPa results in reduction of germination rate and seedling length.

  13. The lectotypification of Acrostichum acuminatum Willd. and the reinstatement of the name Photinopteris speciosa (Bl.) Presl

    NARCIS (Netherlands)

    Hennipman, E.

    1974-01-01

    The name Acrostichum acuminatum Willdenow (1810) was designated by Morton (1967) as the basionym of Photinopteris acuminata (Willd.) Morton. As a consequence the generally accepted name Photinopteris speciosa (Bl.) Presl (bas.: Lomaria speciosa Blume, 1828) was sunk by him into synonymy. The

  14. Hancornia speciosa latex for biomedical applications: physical and chemical properties, biocompatibility assessment and angiogenic activity.

    Science.gov (United States)

    Almeida, Luciane Madureira; Floriano, Juliana Ferreira; Ribeiro, Thuanne Pires; Magno, Lais Nogueira; da Mota, Lígia Souza Lima Silveira; Peixoto, Nei; Mrué, Fátima; Melo-Reis, Paulo; Lino Junior, Ruy de Souza; Graeff, Carlos Frederico de Oliveira; Gonçalves, Pablo José

    2014-09-01

    The latex obtained from Hancornia speciosa is used in folk medicine for treatment of several diseases, such as acne, warts, diabetes, gastritis and inflammation. In this work, we describe the biocompatibility assessment and angiogenic properties of H. speciosa latex and its potential application in medicine. The physical-chemical characterization was carried out following different methodologies (CHN elemental analyses; thermogravimetric analyses and Fourier transform infrared spectroscopy). The biocompatibility was evaluated through cytotoxicity and genotoxicity tests in fibroblast mouse cells and the angiogenic properties were evaluated using the chick chorioallantoic membrane (CAM) assay model. The physical-chemical results showed that the structure of Hancornia speciosa latex biomembrane is very similar to that of Hevea brasiliensis (commercially available product). Moreover, the cytotoxicity and genotoxicity assays showed that H. speciosa latex is biocompatible with life systems and can be a good biomaterial for medical applications. The CAM test showed the efficient ability of H. speciosa latex in neovascularization of tissues. The histological analysis was in accordance with the results obtained in the CAM assay. Our data indicate that the latex obtained from H. speciosa and eluted in water showed significant angiogenic activity without any cytotoxic or genotoxic effects on life systems. The same did not occur with H. speciosa latex stabilized with ammonia. Addition of ammonia does not have significant effects on the structure of biomembranes, but showed a smaller cell survival and a significant genotoxicity effect. This study contributes to the understanding of the potentialities of H. speciosa latex as a source of new phytomedicines.

  15. Kratom (Mitragyna Speciosa Korth): Manfaat, Efek Samping dan Legalitas

    OpenAIRE

    Raini, Mariana

    2017-01-01

    Kratom or Mitragyna speciosa Korth (Rubiaceae) is tree that is commonly found in Southeast Asia. It has been considered useful as a herbal medication to treat a number of problems such as diarrhea, in the alleviation of pain, coughs, hypertension, and to improve sexual performance. The ingestion of kratom produces a stimulant effect at low dosages and an opioid-like effect at medium to high dosages. Kratom is often misused and easily purchased from the internet. The aim of this study is to re...

  16. Diversity and genetic structure in natural populations of Hancornia speciosa var. speciosa Gomes in northeastern Brazil Diversidade e estrutura genética em populações naturais de Hancornia speciosa var. speciosa Gomes no nordeste do Brasil

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    Georgia Vilela Martins

    2012-12-01

    Full Text Available Hancornia speciosa Gomes is a fruit tree native from Brazil that belongs to Apocinaceae family, and is popularly known as Mangabeira. Its fruits are widely consumed raw or processed as fruit jam, juices and ice creams, which have made it a target of intense exploitation. The extractive activities and intense human activity on the environment of natural occurrence of H. speciosa has caused genetic erosion in the species and little is known about the ecology or genetic structure of natural populations. The objective of this research was the evaluation of the genetic diversity and genetic structure of H. speciosa var. speciosa. The genetic variability was assessed using 11 allozyme loci with a sample of 164 individuals distributed in six natural populations located in the States of Pernambuco and Alagoas, Northeastern Brazil. The results showed a high level of genetic diversity within the species (e= 0.36 seeing that the most of the genetic variability of H. speciosa var. speciosa is within its natural populations with low difference among populations ( or = 0.081. The inbreeding values within ( = -0.555 and among populations ( =-0.428 were low showing lacking of endogamy and a surplus of heterozygotes. The estimated gene flow ( m was high, ranging from 2.20 to 13.18, indicating to be enough to prevent the effects of genetic drift and genetic differentiation among populations. The multivariate analyses indicated that there is a relationship between genetic and geographical distances, which was confirmed by a spatial pattern analysis using Mantel test (r = 0.3598; p = 0.0920 with 1000 random permutations. The high genetic diversity index in these populations indicates potential for in situ genetic conservation.Hancornia speciosa Gomes é uma árvore frutífera nativa do Brasil, pertencente à família Apocinaceae, e é conhecida popularmente como Mangabeira. Seus frutos são amplamente consumidos in natura ou processados como sucos, sorvetes e

  17. Genetic diversity of the Neotropical tree Hancornia speciosa Gomes in natural populations in Northeastern Brazil.

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    Jimenez, H J; Martins, L S S; Montarroyos, A V V; Silva Junior, J F; Alzate-Marin, A L; Moraes Filho, R M

    2015-12-22

    Mangabeira (Hancornia speciosa Gomes) is a fruit tree of the Apocynaceae family, which is native to Brazil and is a very important food resource for human populations in its areas of occurrence. Mangabeira fruit is collected as an extractive activity, and no domesticated varieties or breeding programs exist. Due to a reduction in the area of ecosystems where it occurs, mangabeira is threatened by genetic erosion in Brazil. The objective of this study was to characterize and evaluate the genetic diversity of 38 mangabeira individuals collected from natural populations in Pernambuco State using inter-simple sequence repeat (ISSR) molecular markers. The ISSR methodology generated a total of 93 loci; 10 were monomorphic and 83 were polymorphic. The average number of loci per primer was 15.5, ranging from 9 (#UBC 866) to 21 (#UBC 834). The results showed a high level of genetic diversity (0.30), and found that only around 30% of genetic variability is distributed among populations (GST = 0.29, ФST = 0.30), with the remainder (ФCT = 70%) found within each population, as expected for forest outcrossing species. Estimates for historic gene flow (1.18) indicate that there is some isolation of these populations, and some degree of genetic differentiation.

  18. Characterization of nutrient deficiency in Hancornia speciosa Gomes seedlings by omitting micronutrients from the nutrient solution

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    Layara Alexandre Bessa

    2013-06-01

    Full Text Available Hancornia speciosa Gomes (Mangaba tree is a fruit tree belonging to the Apocynaceae family and is native to Brazil. The production of seedlings of this species is limited by a lack of technical and nutritional expertise. To address this deficiency, this study aimed to characterize the visual symptoms of micronutrient deficiency and to assess growth and leaf nutrient accumulation in H. speciosa seedlings supplied with nutrient solutions that lack individual micronutrients. H. speciosa plants were grown in nutrient solution in a greenhouse according to a randomized block design, with four replicates. The treatments consisted of a group receiving complete nutrient solution and groups treated with a nutrient solution lacking one of the following micronutrients: boron (B, copper (Cu, iron (Fe, manganese (Mn, zinc (Zn, and molybdenum (Mo. The visual symptoms of nutrient deficiency were generally easy to characterize. Dry matter production was affected by the omission of micronutrients, and the treatment lacking Fe most limited the stem length, stem diameter, root length, and number of leaves in H. speciosa seedlings as well as the dry weight of leaves, the total dry weight, and the relative growth in H. speciosa plants. The micronutrient contents of H. speciosa leaves from plants receiving the complete nutrient solution treatment were, in decreasing order, Fe>Mn>Cu>Zn>B.

  19. Cytotoxic and anti-kinetoplastid potential of the essential oil of Alpinia speciosa K. Schum.

    Science.gov (United States)

    Pereira, Pedro S; Maia, Ana J; Duarte, Antônia E; Oliveira-Tintino, Cícera Datiane M; Tintino, Saulo R; Barros, Luiz M; Vega-Gomez, Maria C; Rolón, Miriam; Coronel, Cathia; Coutinho, Henrique D M; da Silva, Teresinha G

    2018-02-01

    Alpinia speciosa K. Schum, known as colônia (colony), is native to tropical Asia and found in parts of tropical America. Its leaves are used to wrap food, rhizomes for food preparation and seeds for health maintenance, and have been widely used by the population as a diuretic, antihypertensive, antiulcerogenic and sedative. The present study aimed to verify the leishmanicidal and trypanocidal potential, as well as the cytotoxicity, of the A. speciosa essential oil, in vitro. A. speciosa presented 1,8-cineole (28.46%), camphor (17.10%) and sabinene (9.95%) as major constituents. The cytotoxic activity of the essential oil presented a low value, while the antipromastigote and antiepimastigote activity presented values considered clinically relevant, since it had an action below 500 μg/mL. In relation to this study, it can be concluded that this is a pioneer in the potential of the A. speciosa essential oil and in the use against the parasites Trypanosoma cruzi Chagas and Leishmania brasiliensis Vianna, having its importance also rooted in this fact. Still in accordance with the results, A. speciosa was effective because it presented values of clinical relevance and low toxicity. It was also observed that the chemical constitution of the above identified compounds with remarkable antiparasitic activities. Copyright © 2018 Elsevier Ltd. All rights reserved.

  20. Beneficial Insect Attraction to Milkweeds (Asclepias speciosa, Asclepias fascicularis in Washington State, USA

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    David G. James

    2016-06-01

    Full Text Available Native plant and beneficial insect associations are relatively unstudied yet are important in native habitat restoration programs for improving and sustaining conservation biological control of arthropod pests in agricultural crops. Milkweeds (Asclepias spp. are currently the focus of restoration programs in the USA aimed at reversing a decline in populations of the milkweed-dependent monarch butterfly (Danaus plexippus; however, little is known of the benefits of these plants to other beneficial insects. Beneficial insects (predators, parasitoids, pollinators attracted to two milkweed species (Asclepias speciosa, Asclepias fascicularis in central Washington State, WA, USA were identified and counted on transparent sticky traps attached to blooms over five seasons. Combining all categories of beneficial insects, means of 128 and 126 insects per trap were recorded for A. speciosa and A. fascicularis, respectively. Predatory and parasitic flies dominated trap catches for A. speciosa while parasitic wasps were the most commonly trapped beneficial insects on A. fascicularis. Bees were trapped commonly on both species, especially A. speciosa with native bees trapped in significantly greater numbers than honey bees. Beneficial insect attraction to A. speciosa and A. fascicularis was substantial. Therefore, these plants are ideal candidates for habitat restoration, intended to enhance conservation biological control, and for pollinator conservation. In central Washington, milkweed restoration programs for enhancement of D. plexippus populations should also provide benefits for pest suppression and pollinator conservation.

  1. Beneficial Insect Attraction to Milkweeds (Asclepias speciosa, Asclepias fascicularis) in Washington State, USA.

    Science.gov (United States)

    James, David G; Seymour, Lorraine; Lauby, Gerry; Buckley, Katie

    2016-06-29

    Native plant and beneficial insect associations are relatively unstudied yet are important in native habitat restoration programs for improving and sustaining conservation biological control of arthropod pests in agricultural crops. Milkweeds (Asclepias spp.) are currently the focus of restoration programs in the USA aimed at reversing a decline in populations of the milkweed-dependent monarch butterfly (Danaus plexippus); however, little is known of the benefits of these plants to other beneficial insects. Beneficial insects (predators, parasitoids, pollinators) attracted to two milkweed species (Asclepias speciosa, Asclepias fascicularis) in central Washington State, WA, USA were identified and counted on transparent sticky traps attached to blooms over five seasons. Combining all categories of beneficial insects, means of 128 and 126 insects per trap were recorded for A. speciosa and A. fascicularis, respectively. Predatory and parasitic flies dominated trap catches for A. speciosa while parasitic wasps were the most commonly trapped beneficial insects on A. fascicularis. Bees were trapped commonly on both species, especially A. speciosa with native bees trapped in significantly greater numbers than honey bees. Beneficial insect attraction to A. speciosa and A. fascicularis was substantial. Therefore, these plants are ideal candidates for habitat restoration, intended to enhance conservation biological control, and for pollinator conservation. In central Washington, milkweed restoration programs for enhancement of D. plexippus populations should also provide benefits for pest suppression and pollinator conservation.

  2. Interactions between thrombin and natural products of Millettia speciosa Champ. using capillary zone electrophoresis.

    Science.gov (United States)

    Zhang, Shuyu; Yin, Ting; Ling, Xiaomei; Liang, Hong; Zhao, Yuying

    2008-08-01

    In Chinese medicine Suberect Spatholobus Stem is used to treat menoxenia, blood deficiency, numb paralyses, and so on. In folk, Millettia speciosa is often used as a substitute for Suberect Spatholobus Stem in some areas but it has not been reported whether M. speciosa is the eligible substitute for Suberect Spatholobus Stem or not till now. In this study, a capillary zone electrophoretic method was applied to determinate the interactions between natural products isolated from M. speciosa Champ. and thrombin for the first time. Both qualitative and quantitative characterizations of the molecule-enzyme binding were determined. Twenty ingredients were isolated from M. speciosa Champ. and the results showed that compared with positive and negative control, the compounds YT-1, YT-2, YT-3, YT-8, YT-9, YT-10, YT-11, YT-12, YT-14, YT-15, YT-16, and YT-20 interacted with thrombin while the other eight had no binding to thrombin. The binding constants of the interaction between compounds and thrombin were calculated by the Scatchard analysis formula. Because M. speciosa contains these compounds which have different levels of anticoagulant activity, it may be the eligible substitute for Suberect Spatholobus Stem.

  3. Social Functioning of Kratom (Mitragyna speciosa) Users in Malaysia.

    Science.gov (United States)

    Singh, Darshan; Müller, Christian P; Vicknasingam, Balasingam K; Mansor, Sharif M

    2015-01-01

    Kratom (Mitragyna speciosa) is an indigenous plant known for its traditional medicinal use, and for its addiction potential, in Southeast Asia. In recent years, kratom and its major alkaloid, mitragynine, spread worldwide with largely unknown effects on behavior and mental health. Recent studies show that kratom use can lead to dependence and that mitragynine works as an addictive drug in animal studies. Nevertheless, kratom preparations were also suggested as a less harmful substitute in opiate withdrawal. Potential side-effects of prolonged kratom use, however, are currently unclear. The aim of this study was to investigate the social functioning of regular kratom users in Malaysia. A cross-sectional survey was carried out in three northern states of Peninsular Malaysia investigating 293 regular kratom consumers using the Addiction Severity Index in a snowball sampling technique. Findings showed that regular kratom users do not experience major impairments in their social functioning, despite being dependent on kratom for prolonged periods. Our findings suggest that chronic kratom administration does not significantly impair social functioning of users in a natural context in Malaysia.

  4. Behavioral and neurochemical characterization of kratom (Mitragyna speciosa) extract.

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    Stolt, Anne-Christin; Schröder, Helmut; Neurath, Hartmud; Grecksch, Gisela; Höllt, Volker; Meyer, Markus R; Maurer, Hans H; Ziebolz, Nancy; Havemann-Reinecke, Ursula; Becker, Axel

    2014-01-01

    Mitragyna speciosa and its extracts are named kratom (dried leaves, extract). It contains several alkaloids and is used in traditional medicine to alleviate musculoskeletal pain, hypertension, coughing, diarrhea, and as an opiate substitute for addicts. Abuse and addiction to kratom is described, and kratom has attracted increasing interest in Western countries. Individual effects of kratom on opioidergic, adrenergic, serotonergic, and dopaminergic receptors are known, but not all of the effects have been explained. Pharmacokinetic and pharmacodynamic data are needed. The effects of kratom extract on mice behavior were investigated following oral (po), intraperitoneal (ip), and intracerebroventricular (icv) application. Receptor-binding studies were performed. In μ opioid receptor knockout mice (-/-) and wild type (+/+) animals, the extract reduced locomotor activity after ip and low po doses in +/+ animals, but not after icv administration. The ip effect was counteracted by 0.3 mg/kg of apomorphine sc, suggesting dopaminergic presynaptic activity. An analgesic effect was only found in -/- mice after icv application. Norbinaltorphimine abolished the analgesic effect, but not the inhibitory effect, on locomotor activity, indicating that the analgesic effect is mediated via κ opioid receptors. Oral doses, which did not diminish locomotor activity, impaired the acquisition of shuttle box avoidance learning. There was no effect on consolidation. Binding studies showed affinity of kratom to μ, δ, and κ opioid receptors and to dopamine D1 receptors. The results obtained in drug-naïve mice demonstrate weak behavioral effects mediated via μ and κ opioid receptors.

  5. FLAVOR BIOGENERATION IN MANGABA (Hancornia speciosa Gomes FRUIT

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    Narenda Narain

    2007-11-01

    Full Text Available Most of the volatile flavoring substances are formed during maturation of fruit when it ripens. In this study, the mangaba (Hancornia speciosa Gomes fruit was harvested at half-ripe and ripe stages of maturity and analyzed for its volatile components. The extracts were obtained from the fruit pulp by using simultaneous distillation and extraction technique. Several extraction parameters such as weight of the pulp, dilution with water, solvent volume and extraction period were standardized to obtain highly characteristic fruit aroma extracts. The extracts were analyzed for the identification of volatile compounds by using a system of high resolution gas chromatograph coupled with mass spectrometer. Eighty-six components were separated out of which 46 compounds were positively identified. The volatile flavoring substances pertaining to classes of esters and terpenes increased from 6.19 to 35.487% and from 7.51 to 10.40%, respectively. The principal volatile compounds present in the pulp of ripe mangaba fruit were isopropyl acetate (19.23%, 3-hexanol (10.74%, linalool (7.38%, ä-limonene (2.43%, 3-pentanol (3.80%, 3-ethyl 2-buten-1-ol (2.53% and furfural (1.52%. Biogeneration of mangaba flavor is mainly characterized due to the presence of compounds pertaining to esters, aldehydes and terpenes.

  6. Medicinal plant extracts on the control of Diabrotica speciosa (Coleoptera: Chrysomelidae Extratos de plantas medicinais no controle de Diabrotica speciosa (Coleoptera: Chrysomelidae

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    F.S. Barbosa

    2013-01-01

    Full Text Available The aim of this study was to evaluate the insecticidal effect of aqueous, alcoholic, and oil extracts from leaves of eight medicinal plants against Diabrotica speciosa prepared at five concentrations. The extracts that used commercial soybean oil as solvent showed the highest D. speciosa mortality due to the solvent itself, regardless of the used plants and their concentrations. Thus, commercial soybean oil was discarded as solvent since at these volumes it would cause serious phytotoxicity problems. After 24 hours of exposure of the pest to the extracts, the highest D. speciosa mortality values were observed for Copaifera langsdorfii and Chenopodium ambrosioides extracts, both in 5% alcohol, and Artemisia verlotorum, in 10% water. However, in the last mortality assessment (48 h, C. langsdorfii extract in 5% alcohol showed higher mortality of this pest, followed by C. ambrosioides extract in 5% alcohol, compared to the remaining plants.O objetivo deste trabalho foi avaliar o efeito inseticida de extratos aquosos, alcoólicos e oleosos de folhas de oito plantas medicinais contra Diabrotica speciosa preparadas em cinco concentrações. Os extratos que utilizaram óleo de soja comercial como solvente apresentaram as maiores mortalidades de D. speciosa em função do próprio óleo, independentemente das plantas utilizadas em suas concentrações. Sendo assim, o óleo de soja comercial foi descartado como solvente, pois nestes volumes acarretaria sérios problemas de fitotoxidade. Após 24 horas de exposição da praga aos extratos, os maiores valores de mortalidade de D. speciosa foram observados nos extratos de Copaifera Langsdorfii e de Chenopodium ambrosioides, ambos em álcool 5%, e de Artemisia verlotorum, em água 10%. Entretanto, na última avaliação de mortalidade (48 h, o extrato de C. langsdorfii em álcool a 5% apresentou maior mortalidade dessa praga, seguida pelo extrato alcoólico a 5% de C. ambrosioides comparada às demais plantas.

  7. Caracterização de frutos e árvores de populações naturais de Hancornia speciosa Gomes do cerrado Characterization of fruits and trees from natural population of Hancornia speciosa Gomes of cerrado

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    Rita Maria Devós Ganga

    2010-03-01

    Full Text Available O trabalho objetivou caracterizar árvores e frutos de populações naturais de Hancornia speciosa Gomes, bem como avaliar a distribuição da variabilidade fenotípica existente. Populações de mangabeiras foram amostradas no Cerrado, incluindo os Estados de Goiás, Tocantins, Mato Grosso, Mato Grosso do Sul e Bahia, abrangendo 109 matrizes de 35 populações das variedades botânicas pubescens, gardneri, speciosa e cuyabensis. Os resultados mostraram que, nas condições do Cerrado, as matrizes de H. speciosa apresentam elevados níveis de variação fenotípica quanto a caracteres de frutos, sendo que a maioria dessas variações está entre populações. Há, também, uma grande variação fenotípica dentro das variedades botânicas. H. speciosa var. gardneri e H. speciosa var. pubescens têm frutos maiores e mais pesados. A variedade botânica gardneri apresenta porte mais alto que as demais. Nas variedades gardneri e pubescens, predominam frutos redondos e verde-claros, enquanto em speciosa e cuyabensis predominam frutos de formato oblongo e coloração amarelo-escura e verde-escura, respectivamente. As variedades gardneri e pubescens destacam-se como de maior potencial para a seleção baseada em caracteres de tamanho e massa dos frutos.The research intends to characterize trees and fruits from natural populations of Hancornia speciosa Gomes, as well as evaluate the distribution of phenotypic variability among them. Populations of mangaba trees were sampled in the Cerrado, including the states of Goiás, Tocantins, Mato Grosso, Mato Grosso do Sul, and Bahia, covering 109 mother plants from 35 populations of the botanical varieties pubescens, gardneri, speciosa and cuyabensis. The results showed that the H. speciosa plants have high levels of phenotypic variation in terms of fruit characterization and, on the whole, most of this variation occurs among populations. There is also a large phenotypic variability within the botanical

  8. Antistress activity of Argyreia speciosa roots in experimental animals

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    Nikunj B Patel

    2011-01-01

    Full Text Available The antistress effect of a seven-day treatment (100 and 200 mg / kg, p.o. of the hydroalcoholic extract of Argyreia speciosa root (ASE was evaluated by using the swimming endurance test, acetic acid-induced writhing test, pentylenetetrazole-induced convulsion test, anoxic tolerance test, cold-restraint, stress-induced gastric ulcers, aspirin-induced ulcers, and biochemical, and histopathological changes in the cold-restraint stress test. The immunomodulatory activity was also evaluated for the same doses, and treatment of ASE was done using the hemagglutination test. Both the doses of ASE showed antistress activity in all the tested models. The ASE-treated animals showed a decrease in immobility time and an increase in anoxic tolerance time in swimming endurance and the anoxic tolerance tests, respectively. The effect of glacial acetic acid and pentylenetetrazole were also reduced by decreasing the number of writhing responses and increasing the onset of convulsions, respectively. In the cold restrained stress and aspirin-induced gastric ulcer models, ASE showed a significant reduction in the ulcer index. Pretreatment with ASE significantly ameliorated the cold stress-induced variations in biochemical levels such as increased plasma cholesterol, triglyceride, glucose, total protein, and cortisol. ASE was also effective in preventing the pathological changes in the adrenal gland, due to cold restrained stress, in rats. In mice immunized with sheep red blood cells, the treatment groups subjected to restraint stress prevented the humoral immune response to the antigen. The immunostimulating activity of the ASE was indicated by an increase in the antibody titer in mice pre-immunized with sheep red blood cells and subjected to restraint stress. The findings of the present investigations indicate that the ASE has significant antistress activity, which may be due to the immunostimulating property and increased resistance, nonspecifically, against all

  9. Gastroprotective effect of standardized leaf extract from Argyreia speciosa on experimental gastric ulcers in rats.

    Science.gov (United States)

    Jaiswal, Sunil K; Rao, Chandana V; Sharma, Brijesh; Mishra, Pritee; Das, Sanjib; Dubey, Mukesh K

    2011-09-01

    Argyreia speciosa (L.f), Sweet (Family Convolvulaceae) is used traditionally in Indian System of Medicine as aphrodisiac, rejuvenating agent, intellect promoting agent, brain tonic and in the therapy of hepatomegaly, diabetes and chronic ulcer. To study the gastroprotective effect of standardized butanol fraction of Argyreia speciosa leaf (ASE). The butanol fraction of Argyreia speciosa leaf (ASE; 50, 100 and 200mg/kg body weight) was administered orally, twice daily for 5 days for prevention from Aspirin (ASP)-, ethanol (EtOH)-, cold-restraint stress (CRS) - and pylorus ligation (PL)-induced ulcers. Estimation of antioxidant enzymes activity was carried out in CRS-induced ulcer model, and various gastric secretion parameters like volume of gastric juice, acid output, and pH value were estimated in PL-induced ulcer model. ASE showed dose-dependent ulcer protective effect in ASP 23.64-58.76% (plevel (plevel (pcompared with CRS-induced group. A gradual and significant increase in CAT values were observed at 100 and 200mg/kg dose levels (pstudy revealed that Argyreia speciosa possess significant dose dependent gastroprotective activity, probably due to its free radical scavenging activity. Copyright © 2011 Elsevier Ireland Ltd. All rights reserved.

  10. An evidence-based systematic review of kratom (Mitragyna speciosa) by the Natural Standard Research Collaboration.

    Science.gov (United States)

    Ulbricht, Catherine; Costa, Dawn; Dao, Julie; Isaac, Richard; LeBlanc, Yvonne C; Rhoades, Jenna; Windsor, Regina C

    2013-06-01

    An evidence-based systematic review of kratom (Mitragyna speciosa) by the Natural Standard Research Collaboration consolidates the safety and efficacy data available in the scientific literature using a validated, reproducible grading rationale. This article includes written and statistical analysis of clinical trials, plus a compilation of expert opinion, folkloric precedent, history, pharmacology, kinetics/dynamics, interactions, adverse effects, toxicology, and dosing.

  11. Hancornia speciosa Gomes (Apocynaceae) as a potential anti-diabetic drug.

    Science.gov (United States)

    Pereira, Aline C; Pereira, Ana Bárbara D; Moreira, Carolina C L; Botion, Leida M; Lemos, Virgínia S; Braga, Fernão C; Cortes, Steyner F

    2015-02-23

    The leaves of Hancornia speciosa Gomes are traditionally used to treat diabetes in Brazil. The aim of the study is to evaluate the potential anti-diabetic effect of Hancornia speciosa extract and derived fractions. The ethanolic extract from Hancornia speciosa leaves and chromatographic fractions thereof were evaluated on α-glucosidase assay, on hyperglycemic effect and glucose uptake. The chemical composition of the extract and its most active fraction was investigated by ESI-LC-MS. The ethanolic extract and derived fractions inhibited α-glucosidase in vitro. However, only the crude extract and the dichloromethane fraction inhibited the hyperglycemic effect induced by starch or glucose. Both the extract and dichloromethane fraction were also able to increase glucose uptake in adipocytes. Bornesitol, quinic acid, and chorogenic acid were identified in the extract, along with flavonoid glycosides, whereas the dichloromethane fraction is majorly composed by esters of lupeol and/or α/β-amirin. Hancornia speciosa has a potential anti-diabetic effect through a mechanism dependent on inhibition of α-glucosidase and increase on glucose uptake. These results give support to the use on traditional medicine of this medicinal plant. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

  12. Evaluation of cytotoxicity and genotoxicity of Hancornia speciosa latex in Allium cepa root model.

    Science.gov (United States)

    Ribeiro, T P; Sousa, T R; Arruda, A S; Peixoto, N; Gonçalves, P J; Almeida, L M

    2016-02-01

    The latex obtained from Hancornia speciosa Gomes (Mangabeira tree) is widely used in traditional medicine to treat a variety of diseases, including diarrhea, ulcer, gastritis, tuberculosis, acne and warts. In this study, the cytotoxicity and genotoxicity effects of H. speciosa latex on the root meristem cells of Allium cepa were examined. Onion bulbs were exposed to different concentrations of latex and then submitted to microscopic analysis using Giemsa stain. Water was used as a negative control and sodium azide as a positive control. The results showed that, under the testing conditions, the mitotic index (MI) of the onion roots submitted to latex treatment did not differ significantly from the negative control, which suggests that the latex is not cytotoxic. Low incidence of chromosome aberrations in the cells treated with H. speciosa latex was also observed, indicating that the latex does not have genotoxic effect either. The MI and the chromosome aberration frequency responded to the latex concentration, requiring more studies to evaluate the dosage effect on genotoxicity. The results indicate that in tested concentrations H. speciosa latex is probably not harmful to human health and may be potentially used in medicine.

  13. Lagerstroemia speciosa ‘Big Pink’, an improved pink flowered queen’s crape myrtle

    Science.gov (United States)

    Technical Abstract Lagerstroemia speciosa (L.) Pers., commonly called Pride-of-India, queen’s or giant crape myrtle, is a large shrub or small tree widely used as a tropical ornamental, with landscape utility limited to USDA Hardiness Zones 10-11. This paper describes a pink-flowered seedling selec...

  14. [Comprehensive evaluation of multi-quality characteristic indexes of Chaenomeles speciosa and C. sinensis fruits].

    Science.gov (United States)

    Liu, Shiyao; Bai, Zhichuan; Li, Jiana

    2012-04-01

    To evaluate the 8 main quality characteristic indexes of fruit-using Chaenomeles speciosa and C. sinensis fruits produced in Chongqing and explore the comprehensive assessment for the fresh eating-quality of the samples based on the theory of fuzzy comprehensive. The total sugar content, titratable acid content, ascorbic acid content and superoxide dismutase (SOD) activity of fresh samples were determined, and the oleanolic acid, ursolic acid, total flavones and total saponins content of dried sample were determined by HPLC and colorimetry method. The fuzzy probability method was used to comprehensively evaluate their fresh eating-quality of the fruit-using C. speciosa and C. sinensis fruits produced in Chongqing. The mean SOD activity of C. speciosa and C. sinensis fresh fruits separately was 15.99 U x mg(-1) and 27.40 U x mg(-1), respectively. And the fresh fruit titratable acid content, total sugar content, ascorbic acid content separately was 0.357 g x L(-1), 0.854 mg x L(-1), 1.118 mg x L(-1) and 0.252 g x L(-1), 0.845 mg x L(-1), 1.260 mg x L(-1), respectively. The oleanolic acid, ursolic acid, total flavones and total saponins content was 0.320%, 0.461%, 43.90 mg x g(-1), 23.11 mg x g(-1) and 0.255%, 0.176%, 41.24 mg x g(-1), 15.01 mg x g(-1), respectively. The Chaenomeles speciosa and C. sinensis sample quality mean comprehensive evaluation value was 0.599 and 0.367 based on the fuzzy probability method. The edible quality of fruit-using C. speciosa fruits are better than C. sinensis fruits produced in Chongqing. And the fuzzy probability method could be used to quality comprehensive evaluation of samples containing many trait paramaters.

  15. Manejo de Diabrotica speciosa com atrativos naturais em horta orgânica Natural attractios for management of Diabrotica speciosa in a organic home garden

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    João José Stüpp

    2006-12-01

    Full Text Available O controle de insetos associados ao cultivo de hortaliças é predominantemente realizado através de pesticidas sintéticos. Entretanto, os riscos do uso indiscriminado dos pesticidas sobre a saúde humana e o meio ambiente deve ser considerado. O objetivo deste trabalho foi estudar a eficácia de atrativos naturais no controle da vaquinha Diabrotica speciosa (Germar (Coleoptera: Chrysomelidae, uma praga de importância econômica na América Latina. Os seguintes tratamentos foram testados: raiz de taiuiá (Cayaponia sp, frutos verdes de porongo/cuia (Lagenaria sp, extrato de folhas de couve-chinesa (Brassica pekinensis, fermentado de frutas, vinagre tinto e água como testemunha. O delineamento foi inteiramente ao acaso, com seis repetições. Os preparados foram acondicionados em armadilhas com garrafas PET de 2.000 ml, com oito aberturas laterais e distribuídas aleatoriamente na área experimental. Frutos verdes de porongo apresentaram captura de adultos de D. speciosa 5,4 vezes maior que raízes de taiuiá e as raízes de taiuiá capturaram 19,7 vezes mais adultos do que a testemunha. Ambas as iscas foram acondicionadas na forma sólida, suspensas internamente na garrafa PET. A menor atratividade foi apresentada pelo extrato aquoso de couve-chinesa, que não diferiu da testemunha. Independentemente do atrativo utilizado, o pico populacional da D. speciosa ocorreu nos meses de fevereiro e março.The control of insects associated with home garden vegetable crops is usually done by sintetic pesticides. However, the risks of the indiscriminate use of pesticides on human health and the environment need to be considered. The objective of this work was to study the attractive efficacy of natural substances on D. speciosa, a very important pest in Latin America. The following treatments were tested: roots of Cayaponia sp., green fruits of Lagenaria sp., water extract of Brassica pekinensis, extract of fermented fruits, red vinegar and water as a

  16. The Impact of Global Climate Change on the Geographic Distribution and Sustainable Harvest of Hancornia speciosa Gomes (Apocynaceae) in Brazil.

    Science.gov (United States)

    Nabout, João Carlos; Magalhães, Mara Rúbia; de Amorim Gomes, Marcos Aurélio; da Cunha, Hélida Ferreira

    2016-04-01

    The global Climate change may affect biodiversity and the functioning of ecosystems by changing the appropriate locations for the development and establishment of the species. The Hancornia speciosa, popularly called Mangaba, is a plant species that has potential commercial value and contributes to rural economic activities in Brazil. The aim of this study was to evaluate the impact of global climate change on the potential geographic distribution, productivity, and value of production of H. speciosa in Brazil. We used MaxEnt to estimate the potential geographic distribution of the species in current and future (2050) climate scenarios. We obtained the productivity and value of production for 74 municipalities in Brazil. Moreover, to explain the variation the productivity and value of production, we constructed 15 models based on four variables: two ecological (ecological niche model and the presence of Unity of conservation) and two socio-economic (gross domestic product and human developed index). The models were selected using Akaike Information Criteria. Our results suggest that municipalities currently harvesting H. speciosa will have lower harvest rates in the future (mainly in northeastern Brazil). The best model to explain the productivity was ecological niche model; thus, municipalities with higher productivity are inserted in regions with higher environmental suitability (indicated by niche model). Thus, in the future, the municipalities harvesting H. speciosa will produce less because there will be less suitable habitat for H. speciosa, which in turn will affect the H. speciosa harvest and the local economy.

  17. The Impact of Global Climate Change on the Geographic Distribution and Sustainable Harvest of Hancornia speciosa Gomes (Apocynaceae) in Brazil

    Science.gov (United States)

    Nabout, João Carlos; Magalhães, Mara Rúbia; de Amorim Gomes, Marcos Aurélio; da Cunha, Hélida Ferreira

    2016-04-01

    The global Climate change may affect biodiversity and the functioning of ecosystems by changing the appropriate locations for the development and establishment of the species. The Hancornia speciosa, popularly called Mangaba, is a plant species that has potential commercial value and contributes to rural economic activities in Brazil. The aim of this study was to evaluate the impact of global climate change on the potential geographic distribution, productivity, and value of production of H. speciosa in Brazil. We used MaxEnt to estimate the potential geographic distribution of the species in current and future (2050) climate scenarios. We obtained the productivity and value of production for 74 municipalities in Brazil. Moreover, to explain the variation the productivity and value of production, we constructed 15 models based on four variables: two ecological (ecological niche model and the presence of Unity of conservation) and two socio-economic (gross domestic product and human developed index). The models were selected using Akaike Information Criteria. Our results suggest that municipalities currently harvesting H. speciosa will have lower harvest rates in the future (mainly in northeastern Brazil). The best model to explain the productivity was ecological niche model; thus, municipalities with higher productivity are inserted in regions with higher environmental suitability (indicated by niche model). Thus, in the future, the municipalities harvesting H. speciosa will produce less because there will be less suitable habitat for H. speciosa, which in turn will affect the H. speciosa harvest and the local economy.

  18. Quality of Hancornia speciosa Gomes seeds in function of drying periods / Qualidade de sementes de Hancornia speciosa Gomes em função do tempo de secagem

    Directory of Open Access Journals (Sweden)

    Cosmo Rufino de Lima

    2010-07-01

    Full Text Available A mangabeira (Hancornia speciosa Gomes, da família Apocynaceae é originária do Brasil. Seus frutos são obtidos principalmente de forma extrativista e sua propagação é realizada por meio de sementes. O objetivo da pesquisa foi avaliar o efeito da secagem da semente na emergência e crescimento inicial de plântulas de H. speciosa. O trabalho foi conduzido no Laboratório de Análises de Sementes do Centro de Ciências Agrárias da Universidade Federal da Paraíba (CCA/UFPB, onde as sementes foram postas para secar sobre papel toalha em condições de laboratório pelos seguintes períodos: 0 (sem secagem, 24, 48, 72, 96, 120 e 144 horas. Determinou-se o teor de água, a porcentagem, primeira contagem e índice de velocidade de emergência, bem como o comprimento e a massa seca de plântulas. O delineamento experimental foi inteiramente ao acaso, com sete tratamentos em quatro repetições de 25 sementes. O teor de água das sementes foi reduzido de 56 para 12% após 144 horas de secagem; a emergência máxima (73% ocorreu após 33 horas de secagem; na primeira contagem as maiores porcentagens de emergência (67% foram obtidas após 16 horas de secagem; os maiores índices de velocidade de emergência (0,62 ocorreram após 21 horas de secagem; o comprimento da raiz reduziu linearmente ao longo da secagem, enquanto constatou-se maior comprimento da parte aérea (4,96 cm quando as sementes foram submetidas à secagem por 57 horas. A secagem das sementes de H. speciosa é recomendada por até 48 horas.Hancornia speciosa Gomes (Apocynaceae, a fruiting plant originated from Brazil, has fruits obtained mainly by extractivism and its main form of propagation is by seeds. The objective of this research work was to evaluate the effect of drying on emergency and initial growth of seedlings of H. speciosa. The work was developed in the Laboratory of Analyses of Seeds (CCA/UFPB, where the seeds were put to dry on towel paper in the laboratory

  19. DANOS CAUSADOS POR LARVAS E ADULTOS DE DIABROTICA SPECIOSA (COLEOPTERA: CHRYSOMELIDAE EM MILHO DAMAGES CAUSED BY LARVAE AND ADULTS OF DIABROTICA SPECIOSA (COLEOPTERA: CHRYSOMELIDAE IN CORN

    Directory of Open Access Journals (Sweden)

    GILBERTO BATISTA CASTOR MARQUES

    1999-11-01

    Full Text Available A espécie Diabrotica speciosa (Germar, 1824 é, tradicionalmente, na fase adulta, uma praga polífaga, embora apresente certa preferência por folhas do feijoeiro e soja. Entretanto, nos últimos anos, a fase de larva deste crisomelídeo adquiriu o status de praga, à semelhança de outras espécies do mesmo gênero nos EUA, causando consideráveis danos ao sistema radicular do milho. O objetivo da pesquisa foi avaliar os danos causados por diferentes níveis populacionais de larvas de D. speciosa às raízes de milho, e, pelos adultos às folhas de milho, soja, feijoeiro e arroz. Desde as menores densidades populacionais de larvas, houve redução significativa no peso seco das raízes do milho, peso seco da parte aérea e na altura das plantas em relação à testemunha. Constatou-se que o nível de controle está aquém de 40 larvas por planta. Os adultos tiveram significativa preferência por folhas do feijoeiro e soja, sendo o milho e o arroz menos consumidos.Diabrotica speciosa (Germar, 1824 is traditionally a polyphagous pest during the adult phase although with some preference for bean and soybean leaves. In the past years, however, the larval phase of this chrysomelid achieved the pest status likewise other species of the genus in the USA causing severe damages to the root system of corn. The aim of this research was to evaluate the damages caused by different population levels of D. speciosa to corn roots and by adults to corn, soybean, bean and rice leaves. A significant decrease in the dry weight of corn roots, in the dry weight of the upper part, and in plant height in comparison with the control plant was observed even in small larvae population densities. The economic threshold level was less than 40 larvae per plant. The adults had significant preference for bean and soybean leaves while corn and rice were less consumed.

  20. Morphometric Variations in the Grasshopper, Chromacris speciosa from Two Localities of Pernambuco in Northeastern Brazil

    Science.gov (United States)

    Cisneiros, Roberta Araújo; de Almeida, Argus Vasconcelos; de Melo, Gabriel Rivas; da Câmara, Cláudio Augusto Gomes

    2012-01-01

    The present study describes morphometric variations in the grasshopper, Chromacris speciosa (Thunberg, 1824) (Orthoptera: Acridoidea: Romaleidae) from two locations in the state of Pernambuco, Brazil. The distance between the sites chosen for collections (Recife and São Lourenço da Mata) is approximately 16 km. The investigation was based on a comparative study of external morphological characteristics of the grasshoppers. Morphometric measurements took into account the different body parts and appendages. Statistical analysis of the measurements revealed significant differences in the size of the specimens between the two locations. Homogeneity tests of the covariance and equality matrices between mean vectors of the results revealed that the grasshopper populations in Recife and São Lourenço da Mata are distinctly different. These findings provide morphological evidence for intraspecific variation in morphological characteristics of the C. speciosa populations from the two locations. PMID:23421530

  1. Uji Efek Sedatif Infusa Daun Kratom (Mitragyna Speciosa) Pada Mencit Jantan Galur Balb/c

    OpenAIRE

    Dini Novindriani

    2013-01-01

    Insomnia is a condition difficult start to sleep, can not sleep or inadequate sleepduration. One of plants which guess have sedative effect is kratom (Mitragyna speciosa). Thisresearch was conducted to determine the sedative effect of kratom leaves infusa to male BALB/cstrain mice. In addition, it aims to determine the effective dose and potential kratom leaves infusawhen compared with diazepamThe mice divided into 5 groups of positive control group (diazepam), negative control(aquadest), and...

  2. Pengembangan Metode Isolasi dan Identifikasi Mitragynine dalam Daun Kratom (Mitragyna speciosa)

    OpenAIRE

    Elsa, Livia

    2016-01-01

    Abstrak Kratom (Mitragina speciosa) merupakan tanaman herbal asal Indonesia. Daun kratom memiliki banyak manfaat sebagai obat herbal seperti obat demam, diare, dan penghilang nyeri. Efek sedatif dan stimulan pada sistem syaraf pusat merupakan efek samping daun Kratom. Harga yang murah dan kemudahan dalam memperoleh daun Kratom menjadi penyebabkan utama daun Kratom banyak disalahgunakan sebagai penganti narkotika terlarang lainnya. Daun kratom masuk kedalam new psychoactive substances (NPS) at...

  3. Penetapan Kadar Fosfor Dalam Buah Petai (Parkia speciosa) Secara Spektrofotometri Sinar Tampak

    OpenAIRE

    Melisa

    2013-01-01

    Parkia speciosa generally consumed by people as other dishes, although there are some people who do not like it due to its odor. It is often recognized as a traditional and uncommon food. This plant products mineral, one of the mineral much is producted is phosphorus. The purpose of this study was to determine levels of phosphorus in the both types: petai padi and papan. Qualitative analysis of phosphorus carried out by turning it into phosphate and ammonium molybdate reagent identified,...

  4. Characterization of Antibiosis to Diabrotica speciosa (Coleoptera: Chrysomelidae) in Brazilian Maize Landraces.

    Science.gov (United States)

    Costa, Eduardo Neves; Nogueira, Luciano; de Souza, Bruno Henrique Sardinha; Ribeiro, Zulene Antônio; Louvandini, Helder; Zukoff, Sarah Natalie; Júnior, Arlindo Leal Boiça

    2018-02-09

    Resistance to insect pests can be found in several native, landrace plants and can be an important alternative to conventional control methods. Diabrotica speciosa (Germar) (Coleoptera: Chrysomelidae) larvae are important maize (Zea mays L.) (Cyperales: Poaceae) root pests and finding native resistance in landraces would greatly contribute to maize-breeding programs aimed at controlling this pest. This study investigated whether the growth, survival, oviposition rhythm, fecundity, and fertility of D. speciosa are negatively influenced by specific maize landraces, and the existence of any morphological barriers in the roots that may correlate with plant resistance to the larval attack. Nineteen genotypes (17 landraces and 2 cultivars) were screened for antibiosis in assays that were conducted in the laboratory using seedling maize plants where the development time, longevity, weight, total survival, and sex ratio of adults were evaluated. Out of nineteen genotypes, eight were selected according to their resistance levels for an additional rearing study evaluating oviposition and fecundity. Landrace Pérola and cultivar SCS 154-Fortuna were classified as resistant because they increased the maturation period from larva to adult and decreased survivorship; and the landrace Palha Roxa was also classified as resistant for showing a lower fertility rate than other landraces. Resistant landraces that were infested by D. speciosa larvae showed greater amounts of some morphological barriers comparing with uninfested plants. The landraces classified as resistant may be considered in future plant-breeding programs, aiming to develop resistant maize cultivars to D. speciosa larval attack. © The Author(s) 2018. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  5. Effects of the extracts from Mitragyna speciosa Korth. leaves on analgesic and behavioral activities in experimental animals

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    Kitja Sawangjaroen

    2007-03-01

    Full Text Available The leaves of Mitragyna speciosa Korth. (M. speciosa were extracted with methanol to give methanol extract. The methanol extract was made in acid and then in alkaline and extracted with chloroform to give alkaloid extract. The effects of the methanol and alkaloid extracts on analgesic activities in hot plate test in mice and tail flick test in rats and behavioral activities in locomotor activity and pentobarbital-induced sleep in mice, were examined. In acute toxicity test, the LD50 values of oral administration of the methanol and alkaloid extracts of M. speciosa leaves in mice were 4.90 g/kg and 173.20 mg/kg, respectively. Oral administration (50, 100 and 200 mg/kg of the methanol extract of M. speciosa leaves significantly prolonged the latency of nociceptive response on hot plate test in mice. The alkaloid extract of M. speciosa also increased the pain response latency at the dose of 20 mg/kg but less potent than those of the methanol extract (100 mg/kg in mice (comparing 5-10 mg/kg alkaloid extract with corresponding to approximately 200 mg/kg of methanol extract. The antinociceptive action of either methanol extract (100 mg/kg, p.o. or alkaloid extract (20 mg/kg, p.o. of M. speciosa leaves was blocked by naloxone (2 mg/kg, i.p. in mice. Neither the methanol extract nor the alkaloid extract significantly prolonged latency of nociceptive response on tail flick test in rats. Both of the extracts had no significant change on spontaneous motor activity or pentobarbital-induced sleep in mice, respectively. These results suggest that the methanol and alkaloid extracts of M. speciosa leaves possess the analgesic activity which partly acted at opioid receptors in the supraspinal opioid system.

  6. Acclimatization of the endangered Mexican epiphytic orchid, Laelia speciosa (H.B.K. Schltr

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    Martha Mireya Ortega-Loeza

    2012-02-01

    Full Text Available In vitro propagation could be an alternative for the conservation of the endemic and endangered Mexican epiphytic orchid Laelia speciosa (H.B.K. Schltr. The goal of this study was to develop a protocol that would enhance acclimatization of in vitro – derived L. speciosa plantlets – a critical stage in propagation and subsequent conservation. Observations of stomata opening during ex vitro acclimatization, and the time of in vitro culture (0, 5, 10, 15, 20, 25, 30 days in greenhouse conditions (pre-acclimatization, on the survival and development of seedlings during the ex vitro acclimatization were carried out. In addition, the effect of different levels of nutrients (100%, 75%, 50%, 25% and 0%-strength salts and sucrose (0, 10, 20, 30, 40 g l−1 in the Murashige and Skoog medium (MS on the same parameters were measured. Plantlets incubated 20 days in greenhouse conditions before ex vitro acclimatization also displayed the best growth with a survival rate of 97.5%, related with high stomata opening. Plantlets on MS containing 100%-strength salts (with 20 days of pre-acclimatization, 40 g l−1 sucrose had the highest rate (97.5–100% of survival and vigor when acclimatized. By improving micropropagation through acclimatization, the sustainable management of L. speciosa now more likely, benefitting the conservation of this endangered species.

  7. The botanical origin of kratom (Mitragyna speciosa; Rubiaceae) available as abused drugs in the Japanese markets.

    Science.gov (United States)

    Maruyama, Takuro; Kawamura, Maiko; Kikura-Hanajiri, Ruri; Takayama, Hiromitsu; Goda, Yukihiro

    2009-07-01

    Kratom is the leaves of Mitragyna speciosa (Rubiaceae). Recently, kratom has been sold in street shops or on the Internet in Japan for the purpose of abuse due to its opium-like effects. In this study, we investigated the botanical origin of the commercial kratom products using the internal transcribed spacer (ITS) sequence analysis of rDNA in preparation for future regulation of this product. In addition, a previously reported method to authenticate the plant, utilizing polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was applied to the same products in order to estimate the method's accuracy and utility. The ITS sequence analysis of the commercial kratoms revealed that most of them were derived from M. speciosa or closely related plants, while the others were made from the same tribe plant as M. speciosa. The reported PCR-RFLP method could clearly distinguish kratoms from the other psychoactive plants available in the Japanese markets and also from related plants. The authentication method is considered to be useful for the practical regulation of the plant due to its wide range of application, high accuracy and simplicity.

  8. Identification of Phenolic Compounds from Hancornia speciosa (Apocynaceae) Leaves by UHPLC Orbitrap-HRMS.

    Science.gov (United States)

    Bastos, Katherine Xavier; Dias, Clarice Noleto; Nascimento, Yuri Mangueira; da Silva, Marcelo Sobral; Langassner, Silvana Maria Zucolotto; Wessjohann, Ludger A; Tavares, Josean Fechine

    2017-01-15

    Apocynaceae is a botanical family distributed mainly in tropical and subtropical regions of the world. In Brazil, they comprise about 90 genera and 850 species, inhabiting various types of vegetation. Within this large botanical family, the genus Hancornia is considered monotypic, with its only species Hancornia speciosa Gomes. Antihypertensive, antidiabetic, and antiviral activities are described for this species. Despite having been the target of some studies, knowledge of its chemical composition is still limited. In this study, the phenolics of H. speciosa leaves were analyzed using ultra-high performance liquid chromatography (UHPLC) coupled to Orbitrap high-resolution mass spectrometry (HRMS). As a result, 14 compounds were identified viz. protocatechuic acid, catechin, and quercetin, and another 14 were putatively identified viz. B- and C-type procyanidins, while just one compound remained unknown. From the identified compounds, 17 are reported for the first time viz. coumaroylquinic acid isomers and eriodyctiol. The results show that Hancornia speciosa can serve as source of valuable phenolics.

  9. Identification and Characterization of TALE Homeobox Genes in the Endangered Fern Vandenboschia speciosa.

    Science.gov (United States)

    Ruiz-Estévez, Mercedes; Bakkali, Mohammed; Martín-Blázquez, Rubén; Garrido-Ramos, Manuel A

    2017-10-17

    We report and discuss the results of a quantitative reverse transcription polymerase chain reaction (qRT-PCR) analysis of the expression patterns of seven three amino acid loop extension ( TALE ) homeobox genes (four KNOTTED-like homeobox ( KNOX ) and three BEL1-like homeobox ( BELL ) genes) identified after next generation sequencing (NGS) and assembly of the sporophyte and gametophyte transcriptomes of the endangered fern species Vandenboschia speciosa . Among the four KNOX genes, two belonged to the KNOX1 class and the other two belonged to the KNOX2 class. Analysis of the deduced amino acid sequences supported the typical domain structure of both types of TALE proteins, and the homology to TALE proteins of mosses, lycophytes, and seed plant species. The expression analyses demonstrate that these homeodomain proteins appear to have a key role in the establishment and development of the gametophyte and sporophyte phases of V. speciosa lifecycle, as well as in the control of the transition between both phases. Vandenboschia speciosa VsKNAT3 (a KNOX2 class protein) as well as VsBELL4 and VsBELL10 proteins have higher expression levels during the sporophyte program. On the contrary, one V. speciosa KNOX1 protein (VsKNAT6) and one KNOX2 protein (VsKNAT4) seem important during the development of the gametophyte phase. TALE homeobox genes might be among the key regulators in the gametophyte-to-sporophyte developmental transition in regular populations that show alternation of generations, since some of the genes analyzed here ( VsKNAT3 , VsKNAT6 , VsBELL4 , and VsBELL6 ) are upregulated in a non-alternating population in which only independent gametophytes are found (they grow by vegetative reproduction outside of the range of sporophyte distribution). Thus, these four genes might trigger the vegetative propagation of the gametophyte and the repression of the sexual development in populations composed of independent gametophytes. This study represents a comprehensive

  10. Transcriptome Analysis of Storage Roots and Fibrous Roots of the Traditional Medicinal Herb Callerya speciosa (Champ.) ScHot.

    Science.gov (United States)

    Xu, Li; Wang, Jiabin; Lei, Ming; Li, Li; Fu, Yunliu; Wang, Zhunian; Ao, Mengfei; Li, Zhiying

    2016-01-01

    Callerya speciosa (Champ.) ScHot is a woody perennial plant in Fabaceae, the roots of which are used medicinally. The storage roots of C. speciosa are derived from fibrous roots, but not all fibrous roots can develop into storage roots. To detect key genes involved in storage roots formation, we performed Illumina sequencing of the C. speciosa storage roots and fibrous roots. De novo assembly resulted in 161,926 unigenes, which were subsequently annotated by BLAST, GO and KEGG analyses. After expression profiling, 4538 differentially expressed genes were identified. The KEGG pathway enrichment analysis revealed changes in the biosynthesis of cytokinin, phenylpropanoid, starch, sucrose, flavone and other secondary metabolites. Transcription factor-related differentially expressed genes (DEGs) were also identified, including such gene families as GRAS, COL, MIKC, ERF, LBD, and NAC. The DEGs related to light signaling, starch, sugar, photohormones and cell wall-loosening might be involved in the formation of storage roots. This study provides the first transcriptome profiling of C. speciosa roots, data that will facilitate future research of root development and metabolites with medicinal value as well as the breeding of C. speciosa.

  11. Trap attributes influencing capture of Diabrotica speciosa (Coleoptera: Chrysomelidae on common bean fields Atributos da armadilha influenciam captura de Diabrotica speciosa (Coleoptera: Chrysomelidae em feijoeiro

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    Maurício Ursi Ventura

    2005-08-01

    Full Text Available Refinements in trap characteristics may improve ability to monitor and mass-trap beetles. Field assays were conducted in common bean fields to assess responses of Diabrotica speciosa (Germar to some trap characteristics. Golden yellow plastic cups (750 mL traps caught more D. speciosa females and males than did clear traps. Carrot slices in Petri dishes baited with Lagenaria vulagaris L. powder (cucurbitacin source - 0.28% caught more beetles than did dishes with carrot alone. Dispensers for the floral volatile attractant 1,4-dimethoxybenze were also compared. Rubber septa dispenser attracted more beetles than did control (dental wicks saturated with acetone. Captures on dental wick, starch matrix and feminine pad dispensers were intermediate and did not differ from those on rubber septa and unbaited controls. Perforated bottle traps (2000 mL, when baited with the floral attractant, caught more beetles than did window bottle traps (both traps contained L. vulgaris powder in most assessments done from two to ten days after trap placement in the field. Traps with the insecticide carbaryl captured more beetles than did traps without it, 2-4 and 8-10 days after trap placement in the field, but not in the remaining periods (0-2, 4-6 and 6-8 days. Traps baited with 1,4-dimethoxybenzene captured more beetles than did the unbaited ones in all assessments (each other day from two to ten days after trap placement in the field. Finally, similar amounts of beetles were captured using plastic bottle traps (2000 mL: perforated, window (both with cucurbitacin and sticky (without cucurbitacin traps, when were baited with the floral attractant.Refinamentos em caraterísticas de armadilhas podem incrementar sua habilidade para monitorar e capturar em massa os insetos. Experimentos foram conduzidos em lavoura de feijoeiro para verificar as respostas de Diabrotica speciosa (Germar a algumas características de armadilhas. Armadilhas de copos plástico (750 m

  12. Isolation, characterization and cross-amplification of polymorphic microsatellite loci in Laelia speciosa (Orchidaceae).

    Science.gov (United States)

    Cortés-Palomec, Aurea C; McCauley, Ross A; Oyama, Ken

    2008-01-01

    Laelia speciosa is an endangered epiphytic orchid endemic to central Mexico. Here, we report on the development of 14 perfect and imperfect microsatellite repeat loci for this species. Numbers of alleles ranged from two to 16 and levels of observed heterozygosities among the 14 loci ranged from 0.28 to 1.00 across two widely divergent populations. All loci were also tested for cross-amplification in four other Laelia species and other selected genera of the subtribe Laeliinae. © 2007 The Authors.

  13. Circumscription and synopsis of Eugenia section Speciosae Bünger & Mazine (Myrtaceae)

    Science.gov (United States)

    de Oliveira Bünger, Mariana; Mazine, Fiorella Fernanda; Lucas, Eve J.; Stehmann, João Renato

    2016-01-01

    Abstract A new section of Eugenia (Myrtaceae) is described, segregate from Eugenia sect. Phyllocalyx. Phylogenetic studies suggest that Eugenia sect. Phyllocalyx as traditionally delimited is paraphyletic. To maintain the monophyly of each of the sections in Eugenia s.l., we herein opt to circumscribe a new section and recognize six taxa in sect. Speciosae, which has a distribution mostly in southeastern Brazil and northern South America. Nomenclatural notes are made and a taxonomic key is provided for the species of the section. PMID:27081351

  14. Inhibition of acidic sphingomyelinase by xanthone compounds isolated from Garcinia speciosa.

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    Okudaira, C; Ikeda, Y; Kondo, S; Furuya, S; Hirabayashi, Y; Koyano, T; Saito, Y; Umezawa, K

    2000-01-01

    Sphingomyelinase is considered to be involved in the regulation of apoptosis and cell growth. In the course of our screening for acidic sphingomyelinase inhibitors we isolated three xanthone compounds, alpha-mangostin, cowanin, and cowanol, from the bark of Garcinia speciosa. These compounds competitively inhibited bovine brain-derived acidic sphingomyelinase with IC(50) values of 14.1, 19.2, and 10.9 microM, respectively and inhibited the acidic sphingomyelinase more effectively than the neutral sphingomyelinase of bovine brain. alpha-Mangostin inhibited the acidic sphingomyelinase in the most selective manner. alpha-Mangostin was chemically modified and its structure-activity relationships are discussed.

  15. Bacterial community associated with the trunk latex of Hancornia speciosa Gomes (Apocynaceae) grown in the northeast of Brazil.

    Science.gov (United States)

    Silva, Thais Freitas da; Coelho, Marcia Reed Rodrigues; Vollú, Renata Estebanez; de Vasconcelos Goulart, Fátima Regina; Alviano, Daniela Sales; Alviano, Celuta Sales; Seldin, Lucy

    2011-03-01

    Prevention or cure of different illnesses through the use of plant latex is a worldwide known concept. The antifungal activity of Hancornia speciosa latex has been observed against Candida albicans. However, H. speciosa latex is not a sterile plant exudate and secondary metabolites produced by bacteria could be involved in fungal inhibition. In the present study, the bacterial communities of the latex from three H. speciosa trees were characterized using traditional plating and molecular methods. Twelve strains isolated from the latex samples were clustered into four groups by amplified ribosomal DNA restriction analysis (ARDRA). One representative of each group was sequenced and they were identified as belonging to the genera Bacillus, Klebsiella, Enterobacter and Escherichia. None of the 12 isolates showed antifungal activity against C. albicans. A lack of a microbial origin for the antifungal properties of latex was noted. DGGE profiles generated from each of the three latex samples showed unique patterns. Sequencing of the DGGE bands demonstrated the affiliation with the genera Klebsiella, Pantoea, Enterobacter and Burkholderia. In addition, clone libraries were generated and the phylogenetic distribution of the 50 analyzed clones was similar to that obtained using DGGE. The presence of some potential pathogens should be considered before using H. speciosa latex in folk medicine.

  16. In vivo anti-androgenic, anti-estrogenic and antioxidant activities of the aqueous extract of Eremomastax speciosa

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    Richard Simo Tagne

    2014-09-01

    Full Text Available Objective: To evaluate the in vivo anti-androgenic, antioxidant activity and anti-estrogenic activities of Eremomastax speciosa (E. speciosa in order to find new method for fighting against chronic diseases such as cancer. Methods: Evaluations of antiandrogenic and antioxidant activities were carried out on male rate receiving simultaneous daily administration of testosterone and different doses of aqueous extract of E. speciosa, during a period of 10 d. The evaluation of antiestrogenic activity was carried out on mature ovariectomized female rats receiving simultaneous daily administration of estradiol and different doses of extract, for a week. Then reproductive organs were weighted, levels of prostatic acid phosphatase, superoxide dismutase and catalase as well as some hematologic parameters were measured. Results: The treatment significantly reduced (P<0.01 the weight of ventral prostate, penis, Cowper’s gland and the level of serum prostatic acid phosphatase; while a significant decrease (P<0.01 of the catalase activity was observed. A significant increase (P<0.05 in the lymphocyte number and significant decrease of monocyte (P<0.05 were noticed. The uterine relative weight were significantly reduced (P<0.01. Conclusions: Generally, these results denote the antiandrogenic, antiestrogenic and immunomodulatory potential of E. speciosa.

  17. Antimicrobial Activity of Cultivable Endophytic Fungi Associated with Hancornia Speciosa Gomes Bark

    Science.gov (United States)

    Chagas, Mardonny Bruno de Oliveira; Prazeres dos Santos, Irailton; Nascimento da Silva, Luis Claudio; Correia, Maria Tereza dos Santos; Magali de Araújo, Janete; Cavalcanti, Marilene da Silva; Lima, Vera Lucia de Menezes

    2017-01-01

    Introduction: In this study, we evaluated the antimicrobial potential of cultivable endophytic fungi associated with Hancornia speciosa Gomes stem bark. Methods and Materials: Plant samples were collected in rainy (July 2010) and dry (January 2011) seasons. In total, 116 endophytic fungi strains were isolated from 90 fragments (64.4% frequency of colonization). Higher fungi frequency was observed in the rainy season (84.4%). The strains were grouped into 14 species; the most frequent were Phoma cava (13.8%), Colletotrichum gloeosporioides (12.1%), and Lasiodiplodia theobromae (11.2%). Fungal diversity was similar in both the seasons. Among the 116 strains, 39 (33.6%) showed antimicrobial activity in preliminary screening. The ten most active isolates were subjected to semi-solid fermentation using rice or corn as substrates. Methanolic extracts were obtained from each fermentation medium and the minimum inhibitory (MIC) and minimum microbicide concentrations (MMC) were determined. Results: The best antimicrobial results (MIC fungi strains grown in rice medium: Aspergillus niger FHS061 against Proteus mirabilis (MIC = 19 µg/mL) and Staphylococcus aureus (MIC = 39 µg/mL). These strains also showed good results when cultivated in corn medium against P. mirabilis (MIC = 78 µg/mL). Conclusion: Thus, the stem bark of H. speciosa harbors diverse endophytic fungi with antimicrobial potential. PMID:29151994

  18. Population Study of Diabrotica speciosa (Ger. (Coleoptera: Chrysomelidae in Fall / Winter Season

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    Ventura Maurício Ursi

    2004-01-01

    Full Text Available Population studies of D. speciosa on fall / winter crops were conducted. Larvae were monitored on maize (Zea mays L., wheat (Triticum aestivum L. and black oats (Avena strigosa Schreb. and beetles on soybeans (Glycine max (L. Mill., maize, common beans (Phaseolus vulgaris L., wheat and black oats from March 23, 2001 to August 24, 2001. Soybean, maize, common beans, wheat and oats were sown on December 28, 2000; February 9, 2001; March 2, 2001; April 26, 2001 and May 11, 2001, respectively. Maize and common beans were grown on latter growing season. Adult beetles of D. speciosa were collected throughout the sampling period. Greatest beetles population peak occurred on wheat in August 3, 2001 which coincided with flowering period. Population dynamics of males and females was similar on common beans and soybeans. Females on maize predominate mostly after the first 30 days after the plant emergence (dae (before were not detected until about 45 dae. Males appeared to predominate during the flowering period. Similar population dynamics of males and females were found on wheat and black oats. Greatest peak of larvae occurred on maize roots. The growing season corn farm system was recently introduced, what probably explains the reports of increasing populations of adults during almost the whole year. Probable applications of the results are discussed.

  19. Behavior of lateral buds of Hancornia speciosa after cryopreservation by encapsulation-vitrification

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    Débora de Oliveira Prudente

    2017-05-01

    Full Text Available Hancornia speciosa is a fruitful species from Cerrado biome with high economic potential. However, the intense and disordered extractivism have caused a reduction of its population in its endemic area. In addition, seed recalcitrance negatively affects the conventional conservation of the species. Aiming to find alternatives that enable the long-term conservation of this species, the study’s objective was to assess the behavior of lateral bud’s regrowth after cryopreservation procedures by encapsulation-vitrification technique. Sodium alginate capsules containing lateral buds were pre-cultured in liquid WPM supplemented with 1.0 M glycerol, and subsequently exposed to different concentrations of sucrose (0.3; 0.75 and 1.0 M for 24 or 48 hours. The capsules were subjected to dehydration in silica gel or airflow hood for 0, 1, 2 and 3 hours before different incubation times in PVS2 (0, 15, 30, 60 and 120 minutes at 0°C. A high regeneration percentage of lateral buds was observed after cryopreservation of capsules treated with 0.75 M sucrose plus 1.0 M glycerol (24 hours, associated with dehydration in an airflow hood (1 hour and immersion in PVS2 (15 minutes. Encapsulation-vitrification allowed the long-term conservation, and provided high plant material survival rates after cryopreservation of Hancornia speciosa sensitive explants.

  20. STATE OF THE ART OF SCIENTIFIC LITERATURE ON Hancornia speciosa: TRENDS AND GAPS

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    LUCIANE MADUREIRA DE ALMEIDA

    Full Text Available ABSTRACT The economic and scientific interest in Hancornia speciosa (mangabeira has been growing in recent years, mainly due to the marketing of fruit and extraction of natural compounds with high pharmacological potential. In this study, a scientometric survey about mangabeira was carried out in order to promote and direct future studies on the species. As a result, low scientific productivity associated with this species was found, with only 131 articles published in the last 69 years. In addition, this study identified some trends in bibliographic production on mangabeira, among them: the increasing number of articles over the years; scientific dissemination in nationwide journals; the main focus of this study is associated with agronomic studies; the experimental approach is more frequent and usually associated with populations of restricted geographical distribution; and the scientific production is mainly from education institutions. Furthermore, this study also allowed the identification of some gaps in knowledge about mangabeira, among them the difficulty in describing and characterizing botanical lines; lack of analysis of the genetic diversity of widely distributed populations; lack of management and conservation projects for the species; lack of description of cultivation, collection and preservation techniques of fruits; and lack of identification of natural compounds responsible for its pharmacological activity. It is expected that the data generated in this study will serve to direct future studies on H. speciosa.

  1. Effects of the Aqueous Extract of Eremomastax speciosa (Acanthaceae on Sexual Behavior in Normal Male Rats

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    B. Nchegang

    2016-01-01

    Full Text Available Objective. We studied prosexual effects of Eremomastax speciosa aqueous extract in male adult rats. Materials and Methods. 100 and 500 mg/kg of extract were administered orally (days 0, 1, 4, 7, 14, and 28 (posttreatment. The sexual behavior of rats receiving a single dose (500 mg/kg was also evaluated after pretreatment with Lω-NAME (10 mg/kg, haloperidol (1 mg/kg, or atropine (5 mg/kg. Controls received distilled water or testosterone enanthate (20 mg/kg/day/3 days (s.c. before the test. Results. The extract (days 1–14 had no significant effect on mount, intromission, and ejaculation frequencies but on day 28 (14 days after treatment, it increased frequency of mounts and intromissions at 500 mg/kg. Mount, intromission, and ejaculation latencies reduced and postejaculatory intervals decreased but the effect did not persist 2 weeks after treatment. Extract prosex effects were greatly reduced by atropine and completely abolished by haloperidol, while Lω-NAME increased mount latency and potentiated extract effect on intromission and ejaculation latencies. Conclusion. In summary, E. speciosa extract can have positive effects on male sexual motivation and performance when administered for two weeks at the dose of 500 mg/kg. The effects (dopaminergic and/or cholinergic dependent tend to appear during the posttreatment period.

  2. Polyphenolic Profile and Bioactivity Study of Oenothera speciosa Nutt. Aerial Parts

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    Siham M. El-Shenawy

    2009-04-01

    Full Text Available Two new flavonol glycosides, myricetin 4'-O-α-L-rhamnopyranoside (1 and quercetin 3'-O-α-L-rhamnopyranoside (2, together with a novel biflavonol compound, speciin (3, as well as eleven phenolic metabolites, namely myricitrin (4, europetin 3-O-α-L-1C4-rhamnopyranoside (5, quercitrin (6, hyperin (7, rhamnetin 3-O-β-galacto-pyranoside (8, caffeic acid (9, caffeic acid methyl ester (10, chlorogenic acid (11, chlorogenic acid methyl ester (12, gallic acid (13 and gallic acid methyl ester (14, were identified from the 80 % methanol extract of the aerial parts (leaves and stems of Oenothera speciosa Nutt. (Onagraceae. In addition myricetin (15, quercetin (16 and ellagic acid (17 were identified from the chloroform extract. The structures were established depending on their chemical and physical analyses (UV, HR-ESIMS, 1D and 2D NMR. It was found that 80 % aqueous methanol extract of O. speciosa is non-toxic to mice up to 5 g kg-1b.wt. The investigated extract exhibited significant antihyperglycaemic and anti-inflammatory activities in a dose dependant manner. Also, the 80 % methanol extract, myricitrin(4 and hyperin(7 showed potent antioxidant activity in vitro using 1,1-diphenyl 2-picryl hydrazyl (DPPH radical assay.

  3. Rapid detection by direct analysis in real time-mass spectrometry (DART-MS) of psychoactive plant drugs of abuse: the case of Mitragyna speciosa aka "Kratom".

    Science.gov (United States)

    Lesiak, Ashton D; Cody, Robert B; Dane, A John; Musah, Rabi A

    2014-09-01

    Mitragyna speciosa, also known commonly as "Kratom" or "Ketum", is a plant with psychoactive properties that have been attributed to the presence of various indole alkaloids such as mitragynine and 7-hydroxymitragynine. M. speciosa use is gaining popularity internationally as a natural and legal alternative to narcotics. As a drug of abuse, its detection and identification are not straightforward, since M. speciosa plant material is not particularly distinctive. Here, we show that direct analysis in real time-mass spectrometry (DART-MS) can be used not only to rapidly identify M. speciosa plant material and distinguish it from other plants, but also to distinguish between M. speciosa plant varieties, based on differences between their chemical profiles. The method is rapid and the analysis expeditious. Plant material such as that found at a crime scene can be analyzed directly with no sample pre-preparation steps. Furthermore, we show that the basis set of principal components that permit characterization of the plant material can be used to positively identify M. speciosa. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

  4. Dormancy-breaking requirements of Sophora tomentosa and Erythrina speciosa (Fabaceae) seeds.

    Science.gov (United States)

    Luzia Delgado, Carolina Maria; Souza de Paula, Alexandre; Santos, Marisa; Silveira Paulilo, Maria Terezinha

    2015-03-01

    The physical dormancy of seeds has been poorly studied in species from tropical forests, such as the Atlantic Forest. This study aimed to examine the effect of moderate alternating temperatures on breaking the physical dormancy of seeds, the morphoanatomy and histochemistry of seed coats, and to locate the structure/region responsible for water entrance into the seed, after breaking the physical dormancy of seeds of two woody Fabaceae (subfamily Faboideae) species that occur in the Brazilian Atlantic Forest: Sophora tomentosa and Erythrina speciosa. To assess temperature effect, seeds were incubated in several temperature values that occur in the Atlantic Forest. For morphological and histochemical studies, sections of fixed seeds were subjected to different reagents, and were observed using light or epifluorescence microscopy, to analyze the anatomy and histochemistry of the seed coat. Treated and nonreated seeds were also analyzed using a scanning electron microscope (SEM) to observe the morphology of the seed coat. To localize the specific site of water entrance, the seeds were blocked with glue in different regions and also immersed in ink. In the present work a maximum temperature fluctuation of 15 degrees C was applied during a period of 20 days and these conditions did not increase the germination of S. tomentosa or E. speciosa. These results may indicate that these seeds require larger fluctuation of temperature than the applied or/and longer period of exposition to the temperature fluctuation. Blocking experiments water inlet combined with SEM analysis of the structures of seed coat for both species showed that besides the lens, the hilum and micropyle are involved in water absorption in seeds scarified with hot water. In seeds of E. speciosa the immersion of scarified seeds into an aniline aqueous solution showed that the solution first entered the seed through the hilum. Both species showed seed morphological and anatomical features for seed coats of the

  5. Supercritical extraction of pupunha (Guilielma speciosa oil in a fixed bed using carbon dioxide

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    Araújo M.E.

    2000-01-01

    Full Text Available The pupunha (Guilielma speciosa is the fruit of a palm tree typical of the Brazilian Northern region, whose stem is used as a source of heart of palm. The fruit, which is about 65% pulp, is a source of oil and carotenes. In the present work, an analysis of the kinetics of supercritical extraction of oil from the pupunha pulp is presented. Carbon dioxide was used as solvent. The extractions were carried out at 25 MPa and 323 K and 30 MPa and 318 K. The chemical composition of the extracts in terms of fatty acids was determined by gas chromatography. The amount of oleic acid, a saturated fatty acid, in the CO2 extracts was larger than that in the extract obtained with hexane. The overall extraction curves were modeled using the single-parameter model proposed in the literature to describe the desorption of toluene from activated coal.

  6. Microstructure, molecular weight and thermal behavior of natural rubber (NR) from mangabeira (Hancornia speciosa)

    International Nuclear Information System (INIS)

    Santos, Expedito Flavio dos; Feitosa, Judith P.A.; Ricardo, Nagila M.P.S.

    2001-01-01

    The natural rubber (NR) from Hancornia speciosa contains characteristics that turns it a good alternative in elastomers supply. The NMR and IR spectra showed that the rubber of mangabeira is composed fundamentally by poly(1,4-cis-isoprene). The rubber molecular weight obtained by GPC and viscometry was 2,0x10 6 and 1,3x10 6 g/mol, respectively, in good agreement with the values determined for seringueira and manicoba NR. The glass transition temperature obtained by DSC (Tg = - 65 deg C) showed the mangabeira rubber is ideal to be utilized in regions of cold climate without compromising its mechanical properties. The rubber has also good thermal stability up to 213 deg C, as indicated by TG curves. This results indicated that the mangabeira NR can be effectively used in vulcanized articles or to be added to asphalt. (author)

  7. Self-treatment of opioid withdrawal using kratom (Mitragynia speciosa korth).

    Science.gov (United States)

    Boyer, Edward W; Babu, Kavita M; Adkins, Jessica E; McCurdy, Christopher R; Halpern, John H

    2008-06-01

    Kratom (Mitragynia speciosa korth) is recognized increasingly as a remedy for opioid withdrawal by individuals who self-treat chronic pain. A patient who had abruptly ceased injection hydromorphone abuse self-managed opioid withdrawal and chronic pain using kratom. After co-administering the herb with modafinil he experienced a tonic-clonic seizure, but he reported only modest abstinence once kratom administration stopped. We confirmed the identity of the plant matter he ingested as kratom and identified no contaminants or adulterants. We also conducted high-throughput molecular screening and the binding affinity at mu, delta and kappa receptors of mitragynine. We report the self-treatment of chronic pain and opioid withdrawal with kratom. The predominant alkaloid of kratom, mitragynine, binds mu- and kappa-opioid receptors, but has additional receptor affinities that might augment its effectiveness at mitigating opioid withdrawal. The natural history of kratom use, including its clinical pharmacology and toxicology, are poorly understood.

  8. Effect of Argyreia speciosa root extract on cafeteria diet-induced obesity in rats.

    Science.gov (United States)

    Kumar, Shiv; Alagawadi, K R; Rao, M Raghavendra

    2011-04-01

    To evaluate the antiobesity effects of the ethanolic extract of Argyreia speciosa roots in rats fed with a cafeteria diet (CD). Obesity was induced in albino rats by feeding them a CD daily for 42 days, in addition to a normal diet. Body weight and food intake was measured initially and then every week thereafter. On day 42, the serum biochemical parameters were estimated and the animals were sacrificed with an overdose of ether. The, liver and parametrial adipose tissues were removed and weighed immediately. The liver triglyceride content was estimated. The influence of the extract on the pancreatic lipase activity was also determined by measuring the rate of release of oleic acid from triolein. The body weight at two-to-six weeks and the final parametrial adipose tissue weights were significantly lowered (P cafeteria diet-induced obesity in rats.

  9. Responses to simulated nitrogen deposition by the neotropical epiphytic orchid Laelia speciosa.

    Science.gov (United States)

    Díaz-Álvarez, Edison A; Lindig-Cisneros, Roberto; de la Barrera, Erick

    2015-01-01

    Potential ecophysiological responses to nitrogen deposition, which is considered to be one of the leading causes for global biodiversity loss, were studied for the endangered endemic Mexican epiphytic orchid, Laelia speciosa, via a shadehouse dose-response experiment (doses were 2.5, 5, 10, 20, 40, and 80 kg N ha(-1) yr(-1)) in order to assess the potential risk facing this orchid given impending scenarios of nitrogen deposition. Lower doses of nitrogen of up to 20 kg N ha yr(-1), the dose that led to optimal plant performance, acted as fertilizer. For instance, the production of leaves and pseudobulbs were respectively 35% and 36% greater for plants receiving 20 kg N ha yr(-1) than under any other dose. Also, the chlorophyll content and quantum yield peaked at 0.66 ± 0.03 g m(-2) and 0.85 ± 0.01, respectively, for plants growing under the optimum dose. In contrast, toxic effects were observed at the higher doses of 40 and 80 kg N ha yr(-1). The δ (13)C for leaves averaged -14.7 ± 0.2‰ regardless of the nitrogen dose. In turn, δ (15)N decreased as the nitrogen dose increased from 0.9 ± 0.1‰ under 2.5 kg N ha(-1)yr(-1) to -3.1 ± 0.2‰ under 80 kg N ha(-1)yr(-1), indicating that orchids preferentially assimilate NH4 (+) rather than NO3 (-) of the solution under higher doses of nitrogen. Laelia speciosa showed a clear response to inputs of nitrogen, thus, increasing rates of atmospheric nitrogen deposition can pose an important threat for this species.

  10. EXTRACTION OF PHENOLIC COMPOUNDS FROM PETAI LEAVES (PARKIA SPECIOSA HASSK. USING MICROWAVE AND ULTRASOUND ASSISTED METHODS

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    Buanasari Buanasari

    2017-06-01

    Full Text Available The antioxidant has an activity to neutralize free radical compound that the body needs to avoid damage cells and tissues. Phenolic is one of the compounds that have an antioxidant activity. The influences of ultrasonic-assisted extraction (UAE and microwave-assisted extraction (MAE conditions on phenolic compounds of Parkia speciosa Hassk. leaves were investigated. The effects of temperature (40°C, 50°C, 60°C and 70°C, time (10, 30 and 50 minutes and material-solvent ratio (1:10, 1:13, 1:15 were evaluated based on the yield, total phenolic content (TPC and antioxidant activity. The result showed that the highest yield (15.82% was obtained at 1:15 (w/w of material-solvent ratio, 50°C of temperature and 50 minutes of extraction time for MAE. The highest yield of UAE is 15.53% that sample was obtained at 1:13 (w/w of material-solvent ratio, 60°C of optimal temperature and 30 minutes extraction time. The highest IC50 of UAE method extract was 52.55 ppm, while the extract obtained using MAE method was 50.44 ppm. UAE is more stable at higher temperatures. Time and solvent which was used more efficient than MAE. Extract of petai leaves (Parkia speciosa Hassk. were very potential to be used as a source of natural antioxidants because they have IC50 values from 41.39 to 66.00 ppm. Its antioxidants capacity is ranged from strong to very strong capacity.

  11. Responses to simulated nitrogen deposition by the neotropical epiphytic orchid Laelia speciosa

    Directory of Open Access Journals (Sweden)

    Edison A. Díaz-Álvarez

    2015-06-01

    Full Text Available Potential ecophysiological responses to nitrogen deposition, which is considered to be one of the leading causes for global biodiversity loss, were studied for the endangered endemic Mexican epiphytic orchid, Laelia speciosa, via a shadehouse dose-response experiment (doses were 2.5, 5, 10, 20, 40, and 80 kg N ha−1 yr−1 in order to assess the potential risk facing this orchid given impending scenarios of nitrogen deposition. Lower doses of nitrogen of up to 20 kg N ha yr−1, the dose that led to optimal plant performance, acted as fertilizer. For instance, the production of leaves and pseudobulbs were respectively 35% and 36% greater for plants receiving 20 kg N ha yr−1 than under any other dose. Also, the chlorophyll content and quantum yield peaked at 0.66 ± 0.03 g m−2 and 0.85 ± 0.01, respectively, for plants growing under the optimum dose. In contrast, toxic effects were observed at the higher doses of 40 and 80 kg N ha yr−1. The δ13C for leaves averaged −14.7 ± 0.2‰ regardless of the nitrogen dose. In turn, δ15N decreased as the nitrogen dose increased from 0.9 ± 0.1‰ under 2.5 kg N ha−1yr−1 to −3.1 ± 0.2‰ under 80 kg N ha−1yr−1, indicating that orchids preferentially assimilate NH4+ rather than NO3− of the solution under higher doses of nitrogen. Laelia speciosa showed a clear response to inputs of nitrogen, thus, increasing rates of atmospheric nitrogen deposition can pose an important threat for this species.

  12. Do consecutive flower visits within a crown diminish fruit set in mass-flowering Hancornia speciosa (Apocynaceae)?

    Science.gov (United States)

    Pinto, C E; Oliveira, R; Schlindwein, C

    2008-05-01

    Hancornia speciosa is a self-incompatible, mass-flowering, sphingophilous fruit crop (mangaba) of northeast and central Brazil. The flowers have a precise pollination apparatus, which optimizes pollen transfer between flower and pollinator. While the pollination mechanism avoids self-pollination, mass-flowering promotes geitonogamy. During a flower visit, almost half of the exogenous pollen grains adhering to the proboscis are deposited on the stigma surface. A pollination experiment with a nylon thread simulating six consecutive flower visits within a crown revealed that only the first two flowers visited (positions 1 and 2) are highly likely to set fruit. Super-production of flowers, and consequently obligate low fruit set, seem to be part of the reproductive strategy of the obligate outcrossing plant, Hancornia speciosa.

  13. Uji Efek Sedatif Ekstrak Etanolik Daun Kratom (Mitragyna Speciosa Korth.) Pada Mencit Jantan Galur Balb/c

    OpenAIRE

    Dini Novindriana

    2013-01-01

    Kratom (Mitragyna speciosa Korth.) yang termasuk dalam keluarga Rubiaceaemerupakan salah satu tanaman khas daerah Putusibau Kalimantan Barat (Indonesia).Daun kratom pada dosis rendah (2-10 gram) dapat menghasilkan efek stimulan,sedangkan pada dosis tinggi memberikan efek sedatif. Penelitian ini bertujuan untukmembuktikan efek sedatif ekstrak etanol daun kratom serta mengetahui dosis efektif danpotensi efek sedatif ekstrak etanol daun kratom jika dibandingkan dengan diazepam.Pengujian efek sed...

  14. Anti-inflammatory activity of aqueous extract and bioactive compounds identified from the fruits of Hancornia speciosa Gomes (Apocynaceae).

    Science.gov (United States)

    Torres-Rêgo, Manoela; Furtado, Allanny Alves; Bitencourt, Mariana Angélica Oliveira; Lima, Maira Conceição Jerônimo de Souza; Andrade, Rafael Caetano Lisbôa Castro de; Azevedo, Eduardo Pereira de; Soares, Thaciane da Cunha; Tomaz, José Carlos; Lopes, Norberto Peporine; da Silva-Júnior, Arnóbio Antônio; Zucolotto, Silvana Maria; Fernandes-Pedrosa, Matheus de Freitas

    2016-08-05

    Hancornia speciosa Gomes (Apocynaceae), popularly known as "mangabeira," has been used in folk medicine to treat inflammatory disorders, hypertension, dermatitis, diabetes, liver diseases and gastric disorders. Although the ethnobotany indicates that its fruits can be used for the treatment of ulcers and inflammatory disorders, only few studies have been conducted to prove such biological activities. This study investigated the anti-inflammatory properties of the aqueous extract of the fruits of H. speciosa Gomes as well as its bioactive compounds using in vivo experimental models. The bioactive compounds were identified by High Performance Liquid Chromatography coupled with diode array detector (HPLC-DAD) and Liquid Chromatography coupled with Mass Spectrometry (LC-MS). The anti-inflammatory properties were investigated through in vivo tests, which comprised xylene-induced ear edema, carrageenan-induced peritonitis and zymosan-induced air pouch. The levels of IL-1β, IL-6, IL-12 and TNF-α were determined using ELISA. Rutin and chlorogenic acid were identified in the extract as the main secondary metabolites. In addition, the extract as well as rutin and chlorogenic acid significantly inhibited the xilol-induced ear edema and also reduced the cell migration in both carrageenan-induced peritonitis and zymosan-induced air pouch models. Reduced levels of cytokines were also observed. This is the first study that demonstrated the anti-inflammatory activity of the extract of H. speciosa fruits against different inflammatory agents in animal models, suggesting that its bioactive molecules, especially rutin and chlorogenic acid are, at least in part, responsible for such activity. These findings support the widespread use of Hancornia speciosa in popular medicine and demonstrate that its aqueous extract has therapeutical potential for the development of herbal drugs with anti-inflammatory properties.

  15. Upregulation of glucose uptake in L8 myotubes by the extract from Lagerstroemia speciosa: a possible mechanism of action

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    Juntipa Purintrapiban

    2009-12-01

    Full Text Available The leaf of Lagerstroemia speciosa L. is used as an anti-diabetic herbal remedy in many countries. In an attempt to discover mechanisms of action of the L. speciosa extract that stimulate glucose uptake, a cell-based radioactive assay of glucose uptake was performed using L8 muscle cells. In this study, the methanol fraction of L. speciosa leaves (LSE contained a high level of phenolic compounds and showed strong capability to stimulate glucose uptake in a dose-dependent manner. The LSE stimulation was slightly inhibited (8.8% by SB203580. The inhibitory effect (23.6% of wortmannin on LSE-stimulated glucose uptake was demonstrated, suggesting LSE action on glucose transporter translocation. LSE-induced glucose uptake was completely reversed by cycloheximide. In addition, an increased amount of total glucose-transporter-1 protein was observed indicating that new protein synthesis is necessary for elevated glucose transport. LSE also enhanced insulin-stimulated glucose transport. These results suggest that LSE action may be mediated primarily via the synthesis of new transporters and involve both insulin-dependent and independent pathways.

  16. A novel interaction between plant-beneficial rhizobacteria and roots: colonization induces corn resistance against the root herbivore Diabrotica speciosa.

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    Franciele Santos

    Full Text Available A number of soil-borne microorganisms, such as mycorrhizal fungi and rhizobacteria, establish mutualistic interactions with plants, which can indirectly affect other organisms. Knowledge of the plant-mediated effects of mutualistic microorganisms is limited to aboveground insects, whereas there is little understanding of what role beneficial soil bacteria may play in plant defense against root herbivory. Here, we establish that colonization by the beneficial rhizobacterium Azospirillum brasilense affects the host selection and performance of the insect Diabrotica speciosa. Root larvae preferentially orient toward the roots of non-inoculated plants versus inoculated roots and gain less weight when feeding on inoculated plants. As inoculation by A. brasilense induces higher emissions of (E-β-caryophyllene compared with non-inoculated plants, it is plausible that the non-preference of D. speciosa for inoculated plants is related to this sesquiterpene, which is well known to mediate belowground insect-plant interactions. To the best of our knowledge, this is the first study showing that a beneficial rhizobacterium inoculant indirectly alters belowground plant-insect interactions. The role of A. brasilense as part of an integrative pest management (IPM program for the protection of corn against the South American corn rootworm, D. speciosa, is considered.

  17. A novel interaction between plant-beneficial rhizobacteria and roots: colonization induces corn resistance against the root herbivore Diabrotica speciosa.

    Science.gov (United States)

    Santos, Franciele; Peñaflor, Maria Fernanda G V; Paré, Paul W; Sanches, Patrícia A; Kamiya, Aline C; Tonelli, Mateus; Nardi, Cristiane; Bento, José Mauricio S

    2014-01-01

    A number of soil-borne microorganisms, such as mycorrhizal fungi and rhizobacteria, establish mutualistic interactions with plants, which can indirectly affect other organisms. Knowledge of the plant-mediated effects of mutualistic microorganisms is limited to aboveground insects, whereas there is little understanding of what role beneficial soil bacteria may play in plant defense against root herbivory. Here, we establish that colonization by the beneficial rhizobacterium Azospirillum brasilense affects the host selection and performance of the insect Diabrotica speciosa. Root larvae preferentially orient toward the roots of non-inoculated plants versus inoculated roots and gain less weight when feeding on inoculated plants. As inoculation by A. brasilense induces higher emissions of (E)-β-caryophyllene compared with non-inoculated plants, it is plausible that the non-preference of D. speciosa for inoculated plants is related to this sesquiterpene, which is well known to mediate belowground insect-plant interactions. To the best of our knowledge, this is the first study showing that a beneficial rhizobacterium inoculant indirectly alters belowground plant-insect interactions. The role of A. brasilense as part of an integrative pest management (IPM) program for the protection of corn against the South American corn rootworm, D. speciosa, is considered.

  18. SUBSTRATES FOR PRODUCTION AND GROWTH OF MANGABA (Hancornia speciosa Gomes SEEDLINGS PRODUÇÃO E CRESCIMENTO DE MUDAS DE MANGABEIRA (Hancornia speciosa Gomez EM DIFERENTES SUBSTRATOS

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    Maria Eloisa Cardoso da Rosa

    2007-09-01

    Full Text Available

    Mangaba (Hancornia speciosa Gomez seedlings were transplanted eleven months after emergence to the following substrates: soil (Oxisol, soil + 33% calcined sugar-cane bagasse, and soil + 66% calcined sugar-cane bagasse, with and without lime and fertilizer. At 70, 100 and 130 days after transplanting, plants were evaluated for height and number of leaf pairs. At the end of the experiment – 130 days – roots and aerial part dry matter were weighed. The addition of 0.5 kg.m-3 of 10-10-10 fertilizer to the soil was the best treatment. Root dry matter was slightly higher than aerial part dry matter on some treatments. Roots have developed more than aerial parts. In general, substrates with pH values between 5.2 and 5.5 promote higher growth of mangaba seedlings, but those with pH between 6.0 and 6.8 cause seedling growth reduction.

    KEY-WORDS: Mangaba; native fruit trees; lime; fertilizer; substrate.

    Mudas de mangabeira (Hancornia speciosa Gomez com onze meses de idade foram submetidas a diferentes combinações de substratos: solo apenas (Latossolo Vermelho-Amarelo, solo + 33% de bagacilho de cana calcinado, e solo + 66% de bagacilho de cana calcinado, os quais receberam ou não calagem e adubação. Após a aplicação dos tratamentos, foram avaliados aos 70, 100 e 130 dias, o diâmetro basal das mudas, a altura de plantas e o número de pares de folhas, bem como o peso seco da parte aérea e da raiz, ao final do experimento. Pôde-se verificar que a adição de 0,5 kg.m-3 do adubo químico 10-10-10 ao solo foi o melhor tratamento, nas condições estudadas. Houve uma tendência de superioridade do peso seco da raiz, em relação à parte aérea, em parte dos tratamentos, evidenciando um maior desenvolvimento da raiz das mudas de mangaba, em rela

  19. O DESAFIO DO BABAÇU (ORBIGNYA SPECIOSA MART. EX SPRENG NO PIAUÍ

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    Antonio Joaquim da Silva

    2015-06-01

    Full Text Available A situação pela qual passam as populações agroextrativistas babaçueiras no Estado do Piauí merece reflexão. A dinâmica econômica atribuída pela atividade produtiva do coco babaçu (Orbignya speciosa Mart. ex Spreng, recentemente denominado de Attalea speciosa Mart. ex Spreng à sociedade piauiense se enfatiza aos períodos pujantes da comercialização da amêndoa no mercado internacional. Em anos recentes, o desafio atribuído à cadeia produtiva do coco babaçu é superar o imobilismo das políticas públicas à atividade, principalmente nos espaços rurais. Nesse sentido, esta análise se funde sobre a realidade encontrada em 13 comunidades rurais do município de Miguel Alves (PI, a qual está alicerçada no modelo de observação não participante, cuja construção dos dados foi realizada a partir da aplicação de formulários e entrevistas semiestruturadas com 75 mulheres quebradeiras de coco, possibilitando levantar informações do perfil socioeconômico das famílias; o padrão tecnológico empregado no manejo e no processamento dos produtos gerados; a diversidade dos mercados de consumo; o manejo dos estoques naturais dos babaçuais; a participação das instituições sociais no sistema produtivo do babaçu; a importância cultural do babaçu nas comunidades e as condições geoambientais para a ocorrência do babaçu no município. Os resultados demonstram que os caminhos para a manutenção da atividade babaçueira no Estado partem da potencialização e irradiação de um integrado programa de desenvolvimento local sustentável nas comunidades.

  20. Assessment and comparison of phytochemical constituents and biological activities of bitter bean (Parkia speciosa Hassk.) collected from different locations in Malaysia.

    Science.gov (United States)

    Ghasemzadeh, Ali; Jaafar, Hawa Z E; Bukhori, Mohamad Fhaizal Mohamad; Rahmat, Mohd Hafizad; Rahmat, Asmah

    2018-02-07

    Parkia speciosa seeds are a common ingredient in Malay cuisine with traditional interest because of its medicinal importance and content of health-promoting phytochemicals. This study evaluated the phytochemical constituents and biological activities (antioxidant and antibacterial activities) of Parkia speciosa Hassk seeds collected from three different regions of Malaysia (Perak, Negeri Sembilan and Johor). Phytochemical constituents (total flavonoid and total phenolic) were measured using the spectrophotometric method, and individual flavonoids and phenolic acids were identified using ultra-high-performance liquid chromatography. Ferric reducing antioxidant potential (FRAP) assay and 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay we used in order to evaluation of antioxidant activities. Disc diffusion method was employed for the evaluation of antibacterial activity of extracts against Gram-positive and Gram-negative bacterial strains. The primary screening of phytochemicals showed that P. speciosa seeds contain alkaloids, terpenoids, flavonoids, and phenolics. Samples collected from Perak contained the highest levels of the phytochemical constituents, with highest DPPH and FRAP activity followed by Negeri sembilan and Johor. From the identified compounds, quercetin and gallic acid were identified as the most abundant compounds. Seeds collected from the Perak location exhibited potent antibacterial activity, against both Gram-positive and Gram-negative bacteria strains. Staphylococcus aureus and Bacillus subtilis were recorded as the bacterial strains most sensitive to P. speciosa seed extracts. Correlation analysis showed that flavonoid compounds are responsible for the antioxidant activities of the P. speciosa seeds studied, while antibacterial activity showed a high correlation with the levels of gallic acid. Parkia speciosa seed grown in Perak exhibit the highest concentrations of phytochemicals, as well as the highest biological activity. It may also be

  1. Efeitos da terra diatomácea sobre Diabrotica speciosa (Germar, 1824 (Coleoptera: Chrysomelidae em batata inglesa Effects of diatomaceous earth on Diabrotica speciosa (Germar, 1824 (Coleoptera: Chrysomelidae in potato

    Directory of Open Access Journals (Sweden)

    Franscinely Aparecida Assis

    2011-06-01

    Full Text Available A espécie Diabrotica speciosa é um crisomelídeo responsável por causar danos consideráveis à batateira, o que torna indispensável seu controle com inseticidas para minimizar os prejuízos causados à cultura. Assim, objetivou-se, com este trabalho, avaliar os efeitos da terra diatomácea sobre o comportamento alimentar e a mortalidade de D. speciosa em batata inglesa em condições de laboratório. Adotou-se o DIC com três tratamentos e oito repetições, sendo: 1 - testemunha; 2 - TD polvilhada (0,5 g/vaso e 3 - TD pulverizada a 1%. As batateiras, cv. Emeraude, foram polvilhadas ou pulverizadas com TD, 30 dias após o plantio e, 24 horas após a aplicação, as plantas foram fornecidas aos insetos, sem e com chance de escolha. Houve diferença significativa entre os tratamentos, sendo a menor porcentagem de folíolos com injúrias observada em plantas que receberam a aplicação de TD pulverizada (teste sem chance de escolha e TD polvilhada ou pulverizada (teste com chance de escolha. Também houve redução do número de injúrias foliares às 24 e às 48 horas (TD polvilhada ou pulverizada e, às 72 horas, a redução foi observada somente com a aplicação da TD polvilhada. Com relação à ação inseticida da TD, foi verificado seu efeito após 48 horas, tanto via polvilhamento, quanto via pulverização. Assim, a aplicação de TD pode auxiliar no manejo de D. speciosa, contribuindo para conferir proteção às plantas de batata inglesa e aumentar a mortalidade desse inseto-praga.The species D. speciosa is a chrysomelid responsible for causing considerable damage on potato plant, making its control with insecticides essential to minimize the damage caused to this culture. The objective of this study was to evaluate the effects of diatomaceous earth (DE on feeding behavior and mortality of D. speciosa in potato under laboratory conditions. A completely randomized design was used with three treatments and eight replicates being: 1

  2. Conservation genetics of an endemic and endangered epiphytic Laelia speciosa (Orchidaceae).

    Science.gov (United States)

    Avila-Díaz, Irene; Oyama, Ken

    2007-02-01

    We used isozymes (16 loci in 11 enzymatic systems) from Laelia speciosa, an endemic and endangered epiphytic orchid of Mexico, to assess the genetic diversity and population genetic structure in nine populations distributed along its geographic range, as well as to detect those populations that are genetically unique and therefore deserve high-priority protection. On average, the genetic diversity was high (percentage of polymorphic loci, P(p) = 76%, mean number of alleles per locus, A = 3.34, the average observed heterozygosity H(O) = 0.302, the average expected heterozygosity H(E) = 0.382). Moderate levels of inbreeding ( f = 0.216, 95% confidence interval = 0.029-0.381) were found. Low levels of genetic differentiation were observed among populations ((p) = 0.040); however, there was a significant correlation between geographic and genetic distances among the populations (Mantel test: r(2) = 0.43, P < 0.05). Populations located within the same mountain range were genetically more similar. Private alleles were found, so proper management requires protection and maintenance of genetic diversity throughout its range. In case of reintroduction, we suggest using individuals propagated from seeds from as many capsules as possible, from close populations. An ex situ conservation strategy also is proposed.

  3. Management of Diabetes and Its Complications with Banaba (Lagerstroemia speciosa L. and Corosolic Acid

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    Toshihiro Miura

    2012-01-01

    Full Text Available Banaba (Lagerstroemia speciosa L. extracts have been used for many years in folk medicine to treat diabetes, with the first published research study being reported in 1940. This paper summarizes the current literature regarding Banaba and its constituents. The hypoglycemic effects of Banaba have been attributed to both corosolic acid as well as ellagitannins. Studies have been conducted in various animal models, human subjects, and in vitro systems using water soluble Banaba leaf extracts, corosolic acid, and ellagitannins. Corosolic acid has been reported to decrease blood sugar levels within 60 min in human subjects. Corosolic acid also exhibits antihyperlipidemic and antioxidant activities. The beneficial effects of Banaba and corosolic acid with respect to various aspects of glucose and lipid metabolism appear to involve multiple mechanisms, including enhanced cellular uptake of glucose, impaired hydrolysis of sucrose and starches, decreased gluconeogenesis, and the regulation of lipid metabolism. These effects may be mediated by PPAR and other signal transduction factors. Banaba extract, corosolic acid, and other constituents may be beneficial in addressing the symptoms associated with metabolic syndrome, as well as offering other health benefits.

  4. Subchronic Toxicity Study of Standardized Methanolic Extract of Mitragyna Speciosa Korth in Sprague-Dawley Rats

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    Mohd Ulul Ilmie Ahmad Nazri

    2015-06-01

    Full Text Available Mitragyna speciosa Korth, or better known as ketum, has long been used by traditional folk around Southeast Asia to prevent fatigue from working under hot tropical weather and as a replacement of opium, which can then cause addiction. To date, no findings have been reported of the toxic effect of ketum subchronically (28 days. Hence, the aim of this study was to investigate the toxicity of subchronic effect of standardised methanolic extract of ketum (SMEMS in Sprague-Dawley rats. Rats were orally administered with 100, 200, and 500 mg/kg of SMEMS for 28 days. Body weights were recorded daily. They were terminated at day 28 to obtain data for haematology, biochemistry, and histopathology of the brain, liver, kidney, lung, heart, sciatic nerve, and spinal cord. The SMEMS affected body weight compared to control group. Biochemistry findings showed that liver and kidney were affected with the abnormal values in AST, creatinine, globulin, glucose, total protein, and urea. However, SMEMS produced toxic effect more to liver, kidney, and lung than other organs as observed histopathologically. The results suggested subchronic exposure of ketum is toxic to the physiology of the animals.

  5. Development of indirect competitive ELISA for quantification of mitragynine in Kratom (Mitragyna speciosa (Roxb.) Korth.).

    Science.gov (United States)

    Limsuwanchote, Supattra; Wungsintaweekul, Juraithip; Keawpradub, Niwat; Putalun, Waraporn; Morimoto, Satoshi; Tanaka, Hiroyuki

    2014-11-01

    Monoclonal antibody (MAb) against mitragynine (MG), an analgesic alkaloid from Kratom leaves (Mitragyna speciosa), was produced. MG was coupled to carrier proteins employing either 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide/N-hydroxysuccinimide (EDC/NHS), a zero-length cross linker or a 5-carbon length glutaraldehyde cross linker. To confirm the immunogenicity, the hapten numbers were determined using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS). Preparation of the MAb was accomplished by the electrofusion method. Hybridoma 1A6 that was constructed from the fusion between splenocytes of EDC/NHS conjugate immunized mice and SP2/0-Ag14 myeloma cells was selected, cloned twice and expanded. The cross-reactivities (CRs) of this MAb 1A6 with a series of indole alkaloids were 30.54%, 24.83% and 8.63% for speciogynine, paynantheine and mitraciliatine, respectively. Using this MAb, an indirect competitive enzyme-linked immunosorbent assay (icELISA) was developed with a measurement range of 32.92-250 μg/mL. Quantitative analysis of the MG contents in plant samples by icELISA correlated well with the standard high performance liquid chromatography method (R(2)=0.994). The MAb against mitragynine provided a tool for detection of MG in Kratom preparations. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

  6. Changing trends in the use of kratom (Mitragyna speciosa) in Southeast Asia.

    Science.gov (United States)

    Singh, Darshan; Narayanan, Suresh; Vicknasingam, Balasingam; Corazza, Ornella; Santacroce, Rita; Roman-Urrestarazu, Andres

    2017-05-01

    Kratom (Mitragyna speciosa. Korth) is an indigenous medicinal plant of Southeast Asia. This review paper aims to describe the trends of kratom use in Southeast Asia. A literature review search was conducted through ScienceDirect, Scopus, ProMed and Google Scholar. Twenty-five articles illustrating kratom use in humans in Southeast Asia were reviewed. Kratom has long been used by rural populations in Southeast Asia as a remedy for common ailments, to fight fatigue from hard manual work, as a drink during social interaction among men, and in village religious functions. Studies based on self-reports suggest that prolonged kratom use does not result in serious health risks or impair social functioning. Two recent trends have also emerged: (a) Kratom is reportedly being used to ease withdrawal from opioid dependence in rural settings; whereas (b) in urban areas, adulterated kratom cocktails are being consumed by younger people to induce euphoria. Legal sanctions appear to have preceded serious scientific investigations into the claimed benefits of ketum. More objective-controlled trials and experiments on humans need to be conducted to validate self-report claims by kratom users in the community. Copyright © 2017 John Wiley & Sons, Ltd.

  7. A case report of inpatient detoxification after kratom (Mitragyna speciosa) dependence.

    Science.gov (United States)

    McWhirter, Laura; Morris, Siobhan

    2010-01-01

    Kratom (Mitragyna speciosa) has been used for medicinal and recreational purposes. It has reported analgesic, euphoric and antitussive effects via its action as an agonist at opioid receptors. It is illegal in many countries including Thailand, Malaysia, Myanmar, South Korea and Australia; however, it remains legal or uncontrolled in the UK and USA, where it is easily available over the Internet. We describe a case of kratom dependence in a 44-year-old man with a history of alcohol dependence and anxiety disorder. He demonstrated dependence on kratom with withdrawal symptoms consisting of anxiety, restlessness, tremor, sweating and cravings for the substance. A reducing regime of dihydrocodeine and lofexidine proved effective in treating subjective and objective measures of opioid-like withdrawal phenomena, and withdrawal was relatively short and benign. There are only few reports in the literature of supervised detoxification and drug treatment for kratom dependence. Our observations support the idea that kratom dependence syndrome is due to short-acting opioid receptor agonist activity, and suggest that dihydrocodeine and lofexidine are effective in supporting detoxification. Copyright © 2010 S. Karger AG, Basel.

  8. Severity of Pain and Sleep Problems during Kratom (Mitragyna speciosa Korth.) Cessation among Regular Kratom Users.

    Science.gov (United States)

    Singh, Darshan; Narayanan, Suresh; Vicknasingam, Balasingam K; Prozialeck, Walter C; Ramanathan, Surash; Zainal, Hadzliana; Harun, Sabariah Noor

    2018-03-20

    Kratom (Mitragyna speciosa Korth.) is traditionally used in Southeast Asia for its medicinal value and psychoactive properties. Nonetheless, cessation from regular kratom use is reported to cause unpleasant dose-dependent withdrawal symptoms. This study aims to evaluate the severity of pain and sleep problems following the cessation of kratom tea/juice consumption among regular kratom users. A total of 170 regular users were recruited through snowball sampling for this cross-sectional study. The Brief Pain Inventory (BPI) and Pittsburgh Sleep Quality Index (PSQI) scales were administered to assess the severity of pain and sleep problems. Most participants experienced moderate pain intensity (84%) and moderate pain interference (70%) during kratom cessation; 46% experienced more sleep problems during kratom cessation. Individuals who consumed ≥4 glasses of kratom tea/juice (about 76-115 mg of mitragynine) daily had higher odds of reporting some pain interference (OR: 2.0; CI: 1.04-3.93: p kratom cessation (OR: 2.0; CI: 1.08-3.68: p kratom tea/juice daily. However, the effects were still relatively mild. Cessation from regular kratom tea/juice consumption is not associated with prolonged pain and sleep problems, as compared to those reported for opioid analgesics.

  9. Showy milkweed, Asclepias speciosa: a potential new semi-arid land crop for energy and chemicals

    Energy Technology Data Exchange (ETDEWEB)

    Adams, R.P. (Native Plants, Inc., Salt Lake City, UT); Balandrin, M.F.; Martineau, J.R.

    1984-01-01

    Research on the chemical composition and domestication trials of Asclepias speciosa, showy milkweed, is presented. Biomass yields were approximately 4.3 ton/ha (1.9 ton/acre) but increased plant density is expected to raise these yields considerably. The milkweeds were harvested with standard haying equipment and baled as with alfalfa hay. Storage tests in ambient conditions indicated that the non-polar extractables. were stable whereas the polar extractables declined approximately 40% after about 2 months and stabilized at that level after five months. Storage in dry conditions resulted in only small losses. The non-polar extracts consist principally of ..cap alpha..- and ..beta..-amyrins and their acetate esters. The methanol extracts contain mostly sucrose and inositol. Milkweed extractives are compared to fossil fuels and cracking to liquid fuels is discussed along with various alternative uses for the extracted residue. The use of milkweed as a new crop depends on weed control, increased yields, product development and the development of commercial extraction and purification technology. 46 references, 3 figures, 12 tables

  10. Qualidade pós-colheita de frutos de diferentes clones de mangabeira (Hancornia speciosa Gomes Postharvest quality of fruits from different mangabeira clones (Hancornia speciosa Gomes

    Directory of Open Access Journals (Sweden)

    Florisvaldo Gama de Souza

    2007-10-01

    Full Text Available Com o objetivo de avaliar a qualidade pós-colheita de frutos de diferentes clones de mangabeira (Hancornia speciosa Gomes para consumo como fruto fresco e/ou industrializado, foram avaliados 10 clones: Ipojuca 3, 4 e 5 (IPJ 3, 4 e 5; Nizia Floresta 1, 6 e 8 (NIF 1, 6 e 8; Parnamirim 11 (PAR 11; Rio Tinto 7 (RIT 7; Extremoz 1 (EXT 1 e Touros 48 (TOU 48, oriundos de um Jardim Clonal instalado em 1996 do Banco Ativo de Germoplasma da Estação Experimental de Mangabeira, pertencente a EMEPA - Empresa Estadual de Pesquisa Agropecuária da Paraíba, situada em João Pessoa, PB. As mangabas foram colhidas manualmente em estádio de maturidade fisiológica, acondicionadas em caixas plásticas de transporte forradas no fundo com espuma de poliestireno e transportadas ao Laboratório de Fisiologia e Tecnologia Pós-colheita da Embrapa Agroindústria Tropical, onde foram caracterizadas física, físico-química e quimicamente. As características de qualidade analisadas foram: massa total do fruto; comprimento, diâmetro, firmeza, número de sementes; rendimento de polpa + casca; percentagem de sementes; pH; acidez total titulável (ATT; sólidos solúveis totais (SST; relação SST/ATT; vitamina C total; açúcares solúveis totais; açúcares redutores, fenólicos poliméricos, oligoméricos e dímeros. A análise de variância revelou diferenças estatísticas para todas as características pelo Teste F. De um modo geral os frutos de mangabeira dos clones avaliados apresentaram características superiores às observadas na literatura, especialmente quanto aos padrões estabelecidos pela I.N. nº 1 de 07/01/2000 do MAPA. Dentre os materiais genéticos avaliados pode-se destacar os clones RIT 8 e TOU 48 como os mais promissores para o mercado de frutas in natura, e os clones IPJ 3 e NIF 6 para o processamento agroindustrial.This work aimed to evaluate the postharvest quality of fruits from different mangabeira clones (Hancornia speciosa Gomes for

  11. Effects of temperature and food on the development of Dysdercus maurus Distant (Hemiptera, Pyrrhocoridae)

    International Nuclear Information System (INIS)

    Almeida, Fabio Souto; Goncalves, Lenicio

    2007-01-01

    Dysdercus maurus Distant, 1901 (Hemiptera, Pyrrhocoridae) is an important pest on Gossypium spp. (cotton tree), Citrus sinensis Osbeck (Rutaceae) and Citrus reticulata Blanco (Rutaceae) crops. This insect also feeds on seeds of Chorisia speciosa St. Hil. (Bombacaceae). This work aimed to evaluate the effects of temperature and food on the development of D. maurus. Eight treatments were carried out, in six of them bugs were fed with seeds of C. speciosa and kept at 15, 18, 20, 25 and 30 ± 1 deg C, 80 ± 3% RH and 12h photo phase or in laboratory conditions (23.5 ± 2.6 deg C, 73.3 ± 9.9 % RH), and in the other two treatments bugs were fed with seeds of cotton variety IAC-22 and kept at 25 or 30 deg C. In all treatments five immature stages were observed. The increase of temperature caused reduction in the developmental time. The temperature of 15 deg C disabled nymphal eclosion and was also lethal to those nymphs ecloded at other temperatures. The lower mortality of nymphs occurred in the temperature of 25 deg C with cotton as food (24.07%). The lower threshold temperature (Tb) occurred for the first instar (11.54 deg C) and the higher for the second instar (15.33 deg C). The females of D. maurus required more degree-days (329.93 degree-days) than males (300.49 degree-days) until adult emergence. (author)

  12. Crude ethanol extract from babassu (Orbignya speciosa: cytotoxicity on tumoral and non-tumoral cell lines

    Directory of Open Access Journals (Sweden)

    Magdalena N. Rennó

    2008-09-01

    Full Text Available Plant-derived substances have been considered as important sources of drugs, including antineoplasic agents. Babassu mesocarp is popularly used in Brazil as a food additive, and in popular medicine against several conditions, such as inflammations, menstrual pains and leukaemia. From babassu Orbignya speciosa (Mart. Barb. Rodr. [Arecaceae (Palmae] epicarp/mesocarp, an ethanol extract was prepared and named OSEME, which was tested on the viability,morphology and metabolism of several cell lines, such as the leukaemic cell lines, HL-60, K562 and the latter multidrug resistant counterpart K562-Lucena 1, the human breast cancer cell line MCF-7, the mouse fibroblast cell line 3T3-L1 and fresh human lymphocytes. OSEME promoted a dose-dependent decrease on the viability of all cells. This effect was much more pronounced on the tumoral cell lines than on non-tumoral cells, a phenomenon revealed by the dose of OSEME which promotes half of maximal effect (ID50. The decrease on viability was followed by shrinkage of cells, alteration on their morphology, and a markedly nuclear condensation. Curiously, stimulation of 6-phosphofructokinase activity (6.6-times was observed on HL-60 cells, treated with OSEME, when compared to control treated with ethanol (vehicle. These results support evidences to suggest OSEME as a promising source of novel antineoplasic agents.Substâncias derivadas de plantas têm sido usadas como importante fonte de agentes antineoplásicos. O mesocarpo do babaçu é popularmente usado no Brasil como suplemento alimentar e na medicina popular para o tratamento de várias afecções, tais como: inflamações, cólicas menstruais e leucemia. A partir do epicarpo/mesocarpo do babaçu Orbignya speciosa (Mart. Barb. Rodr. [Arecaceae (Palmae] foi preparado um extrato etanólico, denominado OSEME, o qual foi incubado com as seguintes linhagens humanas leucêmicas: HL-60, K562 e a sua derivada resistente a múltiplas drogas, K562-Lucena 1; al

  13. Anti-Fatigue and Antioxidant Activity of the Polysaccharides Isolated from Millettiae speciosae Champ. Leguminosae

    Directory of Open Access Journals (Sweden)

    Xiao-Ning Zhao

    2015-10-01

    Full Text Available Millettiae speciosae Champ. Leguminosae (MSC, is a well-known Chinese herb traditionally used as food material and medicine for enhancing physical strength. Our preliminary study found that the aqueous extract of this herb (MSE had an anti-fatigue effect. In this paper, we further separated MSE into total polysaccharides (MSP and supernatant (MSS by alcohol precipitation, and explored which fraction was active for its anti-fatigue effect. Mice were orally administered with MSP or MSS at the doses of 200, 400, and 800 mg/kg for 20 days and the anti-fatigue effect was assessed by exhaustive swimming exercise (ESE. The biochemical parameters related to fatigue after ESE and the in vitro antioxidant activity of active fraction were determined. Our results showed that MSP, instead of MSS, significantly extended the swimming time to exhaustion (p < 0.05, indicating that MSP is responsible for the anti-fatigue effect of MSE. In addition, MSP treatment increased the levels of glucose (Glu and muscle glycogen, whereas it decreased the accumulations of blood urea nitrogen (BUN and lactic acid (Lac. Moreover, ESE increased the levels of creatine phosphokinase (CK, lactic dehydrogenase (LDH, and malondialdehyde (MDA but reduced superoxide dismutase (SOD and glutathione (GSH in plasma. In contrast, MSP inhibited all the above changes relating to fatigue. Furthermore, an in vitro antioxidant test revealed that MSP dose-dependently scavenged ·OH and DPPH free radicals. Taken together, these findings strongly suggested that MSP was able to alleviate physical fatigue by increasing energy resources and decreasing accumulation of detrimental metabolites. The antioxidant activity may crucially contribute to the observed anti-fatigue effect of MSP.

  14. Anti-Fatigue and Antioxidant Activity of the Polysaccharides Isolated from Millettiae speciosae Champ. Leguminosae.

    Science.gov (United States)

    Zhao, Xiao-Ning; Liang, Jia-Li; Chen, Han-Bin; Liang, Ye-Er; Guo, Hui-Zhen; Su, Ze-Ren; Li, Yu-Cui; Zeng, Hui-Fang; Zhang, Xiao-Jun

    2015-10-21

    Millettiae speciosae Champ. Leguminosae (MSC), is a well-known Chinese herb traditionally used as food material and medicine for enhancing physical strength. Our preliminary study found that the aqueous extract of this herb (MSE) had an anti-fatigue effect. In this paper, we further separated MSE into total polysaccharides (MSP) and supernatant (MSS) by alcohol precipitation, and explored which fraction was active for its anti-fatigue effect. Mice were orally administered with MSP or MSS at the doses of 200, 400, and 800 mg/kg for 20 days and the anti-fatigue effect was assessed by exhaustive swimming exercise (ESE). The biochemical parameters related to fatigue after ESE and the in vitro antioxidant activity of active fraction were determined. Our results showed that MSP, instead of MSS, significantly extended the swimming time to exhaustion (p < 0.05), indicating that MSP is responsible for the anti-fatigue effect of MSE. In addition, MSP treatment increased the levels of glucose (Glu) and muscle glycogen, whereas it decreased the accumulations of blood urea nitrogen (BUN) and lactic acid (Lac). Moreover, ESE increased the levels of creatine phosphokinase (CK), lactic dehydrogenase (LDH), and malondialdehyde (MDA) but reduced superoxide dismutase (SOD) and glutathione (GSH) in plasma. In contrast, MSP inhibited all the above changes relating to fatigue. Furthermore, an in vitro antioxidant test revealed that MSP dose-dependently scavenged ·OH and DPPH free radicals. Taken together, these findings strongly suggested that MSP was able to alleviate physical fatigue by increasing energy resources and decreasing accumulation of detrimental metabolites. The antioxidant activity may crucially contribute to the observed anti-fatigue effect of MSP.

  15. Kratom (Mitragyna speciosa) dependence, withdrawal symptoms and craving in regular users.

    Science.gov (United States)

    Singh, Darshan; Müller, Christian P; Vicknasingam, Balasingam K

    2014-06-01

    Kratom (Mitragyna speciosa) preparations have been traditionally used in Southeast Asia for its medicinal properties. Lately, Kratom use has spread to Europe and the US, where abuse potential and health hazards increasingly emerge. This study is the first to measure systematically Kratom dependence, withdrawal symptoms, and drug craving in regular Kratom users in Malaysia. A cross-sectional survey of 293 regular Kratom users was conducted in the community across three northern peninsular states of Malaysia. The Leeds Dependence Questionnaire, Marijuana Withdrawal Checklist, and Marijuana Craving Questionnaire-Short Form were used to measure Kratom dependence, withdrawal and craving. More than half of the regular users (>6 month of use) developed severe Kratom dependence problems, while 45% showed a moderate Kratom dependence. Physical withdrawal symptoms commonly experienced include muscle spasms and pain, sleeping difficulty, watery eyes/nose, hot flashes, fever, decreased appetite, and diarrhoea. Psychological withdrawal symptoms commonly reported were restlessness, tension, anger, sadness, and nervousness. The average amount of the psychoactive compound, mitragynine, in a single dose of a Kratom drink was 79mg, suggesting an average daily intake of 276.5mg. Regular users who consumed ≥3 glasses Kratom per day, had higher odds of developing severe Kratom dependence, withdrawal symptoms, and inability to control Kratom craving. The findings from this study show that regular Kratom use is associated with drug dependency, development of withdrawal symptoms, and craving. These symptoms become more severe with prolonged use and suggest a stronger control of the drug. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

  16. Evaluating the hematological and clinical-chemistry parameters of kratom (Mitragyna speciosa) users in Malaysia.

    Science.gov (United States)

    Singh, Darshan; Müller, Christian P; Murugaiyah, Vikneswaran; Hamid, Shahrul Bariyah Sahul; Vicknasingam, Balasingam K; Avery, Bonnie; Chear, Nelson Jeng Yeou; Mansor, Sharif Mahsufi

    2018-03-25

    Kratom (Mitragyna speciosa Korth.) from the Rubiaceae family is an indigenous tropical medicinal tree of Southeast Asia. Kratom leaves have been used for decades in Malaysia and Thailand in traditional context for its perceived vast medicinal value, and as a mild stimulant among manual labourers. Kratom consumption has been reported to cause side-effects in kratom users. To evaluate kratom's effects towards hematological and clinical-chemistry parameters among regular kratom users in Malaysia. A total of 77 subjects (n=58 regular kratom users, and n=19 healthy controls) participated in this cross-sectional study. All the surveys were conducted through face-to-face interview to elicit subject's socio-demographic characteristics and kratom use history. A full-blood test was also administered. Laboratory analysis was conducted using GC-MS to determine mitragynine content in the acquired kratom samples in order to relate mitragynine consumption with possible alterations in the blood parameters of kratom users. Findings showed that there were no significant differences in the hematological and clinical-chemistry parameters of traditional kratom users and healthy controls, except for HDL and LDL cholesterol values; these were found to be above the normal reference range for the former. Similarly, long-term kratom consumption (>5 years), and quantity of daily kratom use (≥3 ½ glasses; mitragynine content 76.3-114.8mg) did not appear to alter the hematological and biochemical parameters of kratom users. These data suggest that even long-term and heavy kratom consumption did not significantly alter the hematological and clinical-chemistry parameters of kratom users in a traditional setting. Copyright © 2017 Elsevier B.V. All rights reserved.

  17. Inhibitory effects of kratom leaf extract (Mitragyna speciosa Korth.) on the rat gastrointestinal tract.

    Science.gov (United States)

    Chittrakarn, Somsmorn; Sawangjaroen, Kitja; Prasettho, Supaporn; Janchawee, Benjamas; Keawpradub, Niwat

    2008-02-28

    Kratom (Mitragyna speciosa Korth.) is an indigenous plant of Thailand used traditionally in folk medicine although it is claimed to cause addiction. It is used to treat diarrhea, however, there is no scientific evidence to support the use. The aim of this study is to investigate the effect of methanolic extract of kratom leaves on the rat gastrointestinal tract. Kratom extract at 50, 100, 200 and 400 mg/kg (p.o.) caused a dose dependent protection against castor oil-induced diarrhea in rats and also inhibited intestinal transit. The antidiarrheal effect was not antagonized by naloxzone. The inhibition of intestinal transit by kratom extract was significantly different from the control when treated with a single dose for 1 day. For longer-term treatments of 15 and 30 days, kratom extract did not decrease the intestinal transit time indicating that adaptation had occurred. Kratom extract at a dose level of 200 and 400 mg/kg for 30 days and morphine at 3 mg/kg (i.p.) caused a decrease in the increment of body weight that was significantly different from the control and kratom extract at lower doses (50 and 100 mg/kg). However it had no effect on the level of plasma cholecystokinin. The results suggested that methanolic kratom extract exhibited its antidiarrheal effect on rat gastrointestinal tract. The effects may occur via pathways in addition to the action on opioid receptors. High does of kratom extract decreased the increment of body weight similar to the effect of morphine.

  18. Antibacterial activity of kecombrang flower extract (Nicolaia speciosa) microencapsulation with food additive materials formulation

    Science.gov (United States)

    Naufalin, R.; Rukmini, H. S.

    2018-01-01

    Kecombrang flower (Nicolaia speciosa) contains bioactive components of alkaloids, flavonoids, polyphenols, steroids, saponins, and essential oils as potential antimicrobials. The use of antibacterials in the form of essential oils has constraints; therefore microencapsulation needs to be done to prevent damage to the bioactive components. Microencapsulation can prevent degradation due to radiation or oxygen, easy-mix with foodstuffs and also slow the occurrence of evaporation. This study aimed to determine the effect of types of kecombrang extract, the concentration of microcapsules in food additives (NaCl and sucrose), and concentration of flower extract in the microcapsules. This study used Randomized Block Design (RBD) with 18 treatment combinations and two replications. Factors studied were types of kecombrang flower extract of (semi polar and polar extract), Food Additive types (sucrose and NaCl), the concentration of microcapsules in food additive (0%; 15%; 30% w /v). The results showed that polar and non-polar extract microcapsules produced antibacterial activity of 7.178 mm and 7.145 respectively of Bacillus cereus bacteria, while Escherichia coli was 7.272 mm and 7.289 mm respectively. A 30 percent microcapsule concentration provides antibacterial activity with inhibiting zone of 7, 818 mm for B. cereus and 8,045 for E.coli. Food Additive of sucrose concentrations showed that microcapsules produced tend to be more effective in inhibiting the growth of E.coli and B. cereus bacteria than that of NaCl, with each inhibition zone of 7.499 mm and 7.357 mm

  19. Efeito de diferentes substratos na produção de mudas de mangabeira (Hancornia speciosa

    Directory of Open Access Journals (Sweden)

    Elisângela Aparecida da Silva

    2009-09-01

    Full Text Available A mangabeira (Hancornia speciosa Gomes é uma espécie frutífera nativa do Cerrado, que devido às características dos seus frutos apresenta enorme potencial de aceitação pelo mercado consumidor, além de apresentar expressivo potencial produtivo. Objetivou-se avaliar o efeito de diferentes substratos na produção de mudas de mangabeira em sacos de polietileno e determinar o melhor substrato para a propagação da espécie. O trabalho foi conduzido em casa de vegetação na Universidade Estadual de Mato Grosso do Sul, Unidade Universitária de Cassilândia. O delineamento experimental foi em blocos casualizados, com quatro repetições e 15 plantas por parcela. Foram testadas cinco misturas de substratos: A (areia lavada + Plantmax® + solo, 1:1:3 v:v:v; B (casca de arroz carbonizada + Plantmax® + solo, 1:1:3; C (casca de arroz carbonizada + húmus de minhoca + solo, 1:1:3; D (esterco bovino + Plantmax® + solo, 1:1:3, e E (esterco bovino + solo, 2:3. Foram avaliados os parâmetros: porcentagem de germinação, índice de velocidade de emergência (IVE, porcentagem de mortalidade, altura da muda (cm, diâmetro do colo (mm, comprimento da raiz (cm, número de folhas/planta, índice de clorofila foliar (CCI, massa seca, parte aérea da raiz e total (g/planta. As melhores características para uma muda sadia e de boa qualidade para pegamento no campo foram obtidas com os substratos D e E, sendo estes os recomendados para a produção de mudas de mangabeira em sacos de polietileno.

  20. Nanostructured systems containing babassu (Orbignya speciosa oil as a potential alternative therapy for benign prostatic hyperplasia

    Directory of Open Access Journals (Sweden)

    de Sousa VP

    2013-08-01

    Full Text Available Valeria Pereira de Sousa,1 Joanne Crean,2 Vinícius Raphael de Almeida Borges,1 Carlos Rangel Rodrigues,1 Lidia Tajber,2 Fabio Boylan,2 Lucio Mendes Cabral1 1Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; 2School of Pharmacy and Pharmaceutical Sciences and Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland Abstract: The oil of babassu tree nuts (Orbignya speciosa is a potential alternative for treatment and prophylaxis of benign prostatic hyperplasia. Improved results can be obtained by drug vectorization to the hyperplastic tissue. The main objective of this work was the preparation and characterization of poly(lactic-co-glycolic acid (PLGA nanoparticle and clay nanosystems containing babassu oil (BBS. BBS was extracted from the kernels of babassu tree nuts and characterized by gas chromatography-mass spectrometry as well as 1H and 13C nuclear magnetic resonance. BBS-clay nanosystems were obtained by adding polyvinylpyrrolidone, Viscogel B8®, and BBS at a 2:1:1 mass ratio and characterized by X-ray diffraction, thermogravimetric analysis, infrared spectroscopy, and laser diffraction. The PLGA-BBS nanoparticles were prepared by the precipitation-solvent evaporation method. Mean diameter, polydispersity, zeta potential, and scanning electron microscopic images of the nanosystems were analyzed. Thermogravimetric analysis showed successful formation of the nanocomposite. PLGA nanoparticles containing BBS were obtained, with a suitable size that was confirmed by scanning electron microscopy. Both nanostructured systems showed active incorporation yields exceeding 90%. The two systems obtained represent a new and potentially efficient therapy for benign prostatic hyperplasia. Keywords: babassu oil, nanocomposite, poly(lactic-co-glycolic acid, nanoparticles, benign prostatic hyperplasia, treatment, nanotechnology

  1. Population structure and fruit availability of the babassu palm ( Attalea speciosa Mart. ex Spreng in human-dominated landscapes of the Northeast Region of Brazil

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    Juliana Loureiro Almeida Campos

    Full Text Available ABSTRACT We studied the population structure and fruit availability of the babassu palm, Attalea speciosa, in three human-dominated landscapes located near a rural community in the region of Araripe, in the Northeast Region of Brazil, that were under intense fruit harvest. Fifty 10 x 10 m plots were randomly established in each of the three landscapes, and all individuals of A. speciosa within the plots were classified as seedlings, juveniles or adults, with the height of all adult individuals being measured. An additional 20 individuals were marked in each landscape, and the number of total bunches, fruits per bunch and bunches per palm tree were recorded. The populations of A. speciosa in the three landscapes exhibited an inverted J-shape plot, but pasture and shifting cultivation possessed a significantly higher number of individuals, seedlings and adults than the seasonal semideciduous forest, plus they possessed a greater seedling/adult ratio. Shifting cultivation was found to be favorable for fructification. The present study found that shifting cultivation and pastures are landscape practices that can contribute to the rapid expansion and establishment of A. speciosa, which can become a dominant species in the region of Araripe.

  2. Identification and characterization of indole and oxindole alkaloids from leaves of mitragyna speciosa korth using liquid chromatography-accurate QToF mass spectrometry

    Science.gov (United States)

    Alkaloids have been reported to be the major physiologically active constituents in Mitragyna. An analytical method was developed to provide an alternative, fast method for characterization of alkaloids from various Mitragyna speciosa samples. The separation was achieved using a reversed phase (C-8)...

  3. Efectos de la herbivoría sobre la cantidad de óvulos en Loasa speciosa(Loasaceae

    Directory of Open Access Journals (Sweden)

    Milena Gramacho

    2001-06-01

    Full Text Available Examinamos el efecto directo de la herbivoría foliar respecto al valor adaptivo de la planta herbácea Loasa speciosa (Loasaceae, midiendo el número de óvulos en flor en 46 brotes con diferentes niveles de daño foliar. El número de óvulos por flor fue menor en los brotes con mayores niveles de herbivoría. Estos resultados sugieren que el conocido impacto negativo de la herbivoría respecto al valor adaptivo de la plantas (p.e bajo número de semillas puede ser una consecuencia directa de la reproducción en el número de óvulos.We examined the direct effect of foliar herbivory on female fitness in the herbaceous plant Loasa speciosa (Loasaceae, measuring ovule number/flower in 46 shoots with different levels of leaf damage. Ovule number/flower was lower in shoots with higher herbivory levels. This result suggests that the known negative impact of herbivory on female plant fitness (i.e. low seed number can be a direct consequence of the reduction of ovule number.

  4. Effects of Mitragynine and a Crude Alkaloid Extract Derived from Mitragyna speciosa Korth. on Permethrin Elimination in Rats.

    Science.gov (United States)

    Srichana, Kachamas; Janchawee, Benjamas; Prutipanlai, Sathaporn; Raungrut, Pritsana; Keawpradub, Niwat

    2015-03-27

    Detoxification and elimination of permethrin (PM) are mediated by hydrolysis via carboxylesterase (CES). Mitragyna speciosa (kratom) contains mitragynine (MG) and other bioactive alkaloids. Since PM and MG have the same catalytic site and M. speciosa is usually abused by adding other ingredients such as pyrethroid insecticides, the effects of MG and an alkaloid extract (AE) on the elimination of PM were investigated in rats. Rats were subjected to single and multiple pretreatment with MG and AE prior to receiving a single oral dose (460 mg/kg) of PM. Plasma concentrations of trans-PM and its metabolite phenoxybenzylalcohol (PBAlc) were measured. The elimination rate constant (kel) and the elimination half-life (t1/2 el) of PM were determined, as well as the metabolic ratio (PMR). A single and multiple oral pretreatment with MG and AE altered the plasma concentration-time courses of both trans-PM and PBAlc during 8-22 h, decreased the PMRs, delayed elimination of PM, but enhanced elimination of PBAlc. Results indicated that PM-MG or AE toxicokinetic interactions might have resulted from the MG and AE interfering with PM hydrolysis. The results obtained in rats suggest that in humans using kratom cocktails containing PM, there might be an increased risk of PM toxicity due to inhibition of PM metabolism and elimination.

  5. Effects of Mitragynine and a Crude Alkaloid Extract Derived from Mitragyna speciosa Korth. on Permethrin Elimination in Rats

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    Kachamas Srichana

    2015-03-01

    Full Text Available Detoxification and elimination of permethrin (PM are mediated by hydrolysis via carboxylesterase (CES. Mitragyna speciosa (kratom contains mitragynine (MG and other bioactive alkaloids. Since PM and MG have the same catalytic site and M. speciosa is usually abused by adding other ingredients such as pyrethroid insecticides, the effects of MG and an alkaloid extract (AE on the elimination of PM were investigated in rats. Rats were subjected to single and multiple pretreatment with MG and AE prior to receiving a single oral dose (460 mg/kg of PM. Plasma concentrations of trans-PM and its metabolite phenoxybenzylalcohol (PBAlc were measured. The elimination rate constant (kel and the elimination half-life (t1/2 el of PM were determined, as well as the metabolic ratio (PMR. A single and multiple oral pretreatment with MG and AE altered the plasma concentration-time courses of both trans-PM and PBAlc during 8–22 h, decreased the PMRs, delayed elimination of PM, but enhanced elimination of PBAlc. Results indicated that PM–MG or AE toxicokinetic interactions might have resulted from the MG and AE interfering with PM hydrolysis. The results obtained in rats suggest that in humans using kratom cocktails containing PM, there might be an increased risk of PM toxicity due to inhibition of PM metabolism and elimination.

  6. Analysis of lipid profile and atherogenic index in hyperlipidemic rat (Rattus norvegicus Berkenhout, 1769) that given the methanolic extract of Parijoto (Medinilla speciosa)

    Science.gov (United States)

    Sa'adah, Noor Nailis; Purwani, Kristanti Indah; Nurhayati, Awik Puji Dyah; Ashuri, Nova Maulidina

    2017-06-01

    Diet of high lipids cause hyperlipidemia, which marked by an increase of total cholesterols, triglycerides, LDL-C, and decreasing of HDL-C. Hyperlipidemia lead the occurrence of atherosclerosis, one of factors that trigger cardiovascular disease, as hypertention; coronary heart and stroke. Parijoto (M. speciosa) is endemic plants in Asia with a distribution center in Malaysia, Indonesia and Philippines. Parijoto contain phytochemical components such as flavonoids, saponins and kardenolin. Flavonoid potensial as an antioxidants and can improve the hyperlipidemia condition. This study was aimed to determine lipid profiles and atherogenic index of hyperlipidemic Wistar rats (R. norvegicus Berkenhout, 1769) which given the methanolic extract of Parijoto (M. speciosa). The research was done with pre and post test randomized control group design. Rats were given a mixture of duck yolk and reused cooking oil (1:1) orally as much as 1% of body weight (BW) for 30 days. After hyperlipidemia achieved, rats were divided into 5 group: normal rats, hyperlipidemic rats, hyperlipidemic rats were given the methanolic extract of Parijoto (M. speciosa) 500 mg/kg, 1000 mg/kg, and 1500 mg/kg BW. Blood samples were collected when rats in hyperlipidemia conditions and after treatment with the methanolic extract of Parijoto (M. speciosa) for 30 days. The data of total cholesterol, HDL-Cholesterol, LDL-Cholesterol level, and atherogenic index were analyzed using ANOVA followed by Tukey test at 5% significance level. The result showed that giving of methanolic extract of Parijoto (M. speciosa) in hyperlipidemic rats reduced the total cholesterol, LDL-Cholesterol levels, and increased of HDL-cholesterol levels significantly (p<0.01), so atherogenic index reduced significantly too (p<0.01). Total cholesterol and LDL-Cholesterol levels were positively correlated with the atherogenic index, whereas HDL-cholesterol levels were negatively correlated with the atherogenic index.

  7. CONHECIMENTOS TRADICIONAIS ASSOCIADOS E A PROSPECÇÃO TECNOLÓGICA DA HANCORNIA SPECIOSA GOMES.

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    Andre Luiz Gomes de Souza

    2015-12-01

    Full Text Available A mangabeira (Hancornia Speciosa é uma planta frutífera de clima tropical, nativa do Brasil e encontrada em várias regiões do país. Devido à sua alta incidência e consumo, a mangaba se tornou em Sergipe a fruta símbolo do Estado. Em virtude dessa intensa relação histórico-cultural que se manifesta em Sergipe a mangaba é fonte de geração de trabalho e renda para as comunidades extrativistas denominadas Catadoras de Mangaba, as quais também desenvolveram diferentes formas de aproveitamento da mangabeira. Algumas pesquisas apontam que os Conhecimentos Tradicionais associados à mangaba presentes na restinga sergipana apresentam grande valor científico e tecnológico. Assim, o objetivo deste trabalho foi realizar uma prospecção tecnológica da mangaba em bases de dados de patentes para verificar a utilização de Conhecimentos Tradicionais advindos da Cultura da Mangaba. Foi realizada a prospecção tecnológica nas seguintes bases de patentes: INPI, USPTO, ESPACENET e LATIPAT utilizando-se as palavras-chave “Hancornia”, “Hancornia and Speciosa”, “Hancornia” and “Gomes” e “Mangaba” compreendendo todos pedidos de patente até 2015. Os resultados demonstram que a maior parte dos pedidos de patente na base nacional estão relacionados com produtos agroindustriais. As principais aplicações farmacêuticas observadas nas bases de busca de patente referem-se ao tratamento anti-hipertensivo e de regeneração óssea, conforme potencialidades relatadas pelas Catadoras de Mangaba da restinga sergipana, o que sugeri a aplicação de conhecimentos tradicionais por empresas e centros de pesquisa, porém foram observados outras potencialidades da mangaba, como para o tratamento de HIV e como matérias prima precursora de compostos de interesse para produção de medicamentos.

  8. Identifikasi dan Pengendalian Jamur Busuk Putih Buah Salak dengan Ekstrak Bunga Kecombrang (Nicolaia speciosa

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    Aries Pratomo

    2009-12-01

    Full Text Available One of the important disease on snakefruit (Salacca edulis is fruit rot disease with white symptom. Control of snake fruit diseases is better when natural compounds rather than chemicals pesticide were used which might cause consumer hazard. Several of plant extract i.e. from Zingiberaceae which have antimicrobial activity had been studied. The purpose of this study were to identify the pathogen of white rot and to know the effect of torch ginger’s flower (Nicolaia speciosa extract on disease development. The spores was identified under microscopic condition from diseased fruits and isolates. Torch ginger’s flowers was extracted in ethanol. After removal of the ethanol the crude extract was dissolved with distilled water. Food Poisoned Technique was done to evaluate its influence in vitro. Both detached and clustered fruits were sprayed with the extract then inoculated with the pathogen. The result showed that the pathogen was Chalaropsis sp. Detached snakefruit was more susceptible to Chalaropsis sp. infection than those in cluster. In vitro test showed 48–50 % of torch ginger’s flower extract in water inhibit 90% of colony growth. The extract inhibited the development of Chalaropsis sp. in detached snakefruit or in cluster ones. Concentrated extract protected snakefruit up to 100% from Chalaropsis sp. infection.   Salah satu penyakit penting yang menurunkan tingkat pemasaran buah salak adalah penyakit busuk buah dengan gejala jamur putih. Pengendalian penyakit ini dengan bahan nabati lebih baik dibandingkan dengan pestisida kimia yang berbahaya bagi konsumen. Penelitian sebelumnya menunjukkan bahwa tanaman dari keluarga Zingeberaceae antara lain bunga kecombrang mengandung senyawa antimikroba. Tujuan penelitian ini adalah untuk mengetahui penyebab penyakit jamur putih pada buah salak dan pengaruh ekstrak bunga kecombrang untuk pengendalian penyakit tersebut. Identifikasi patogen secara mikroskopi dilakukan secara korekan langsung dan

  9. Seletividade de herbicidas em mudas das espécies nativas Acacia polyphylla, Enterolobium contortisiliquum (Fabaceae, Ceiba speciosa e Luehea divaricata (Malvaceae Herbicides selectivity on seedlings of native species Acacia polyphylla, Enterolobium contortisiliquum (Fabaceae, Ceiba speciosa and Luehea divaricata (Malvaceae

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    P.A. Monquero

    2011-03-01

    Full Text Available Este trabalho avaliou a seletividade de herbicidas sobre espécies nativas de florestas estacionais semideciduais de São Paulo, amplamente utilizadas em projetos de restauração de ecossistemas naturais degradados: Acacia polyphylla e Enterolobium contortisiliquum (Fabaceae, e Ceiba speciosa e Luehea divaricata (Malvaceae. Os tratamentos consistiram de uma testemunha sem herbicida e da aplicação de herbicidas imazapyr (125, 250, 500, 1.000, 2.000 e 3.000 g ha-1, sulfentrazone (100, 200, 400, 800, 1.400 e 2.400 g ha-1, glyphosate (90, 180, 360, 720, 1.440 e 2.160 g ha-1 e metribuzin (360, 720, 1.920, 2.880, 5.760 e 8.400 g ha-1 . Foram avaliados os sintomas de fitotoxicidade aos 30 dias após aplicação (DAA e a biomassa seca da parte aérea. O delineamento experimental foi inteiramente casualizado, com quatro repetições por tratamento. Cada parcela experimental foi constituída de uma muda com 30 cm de altura. Os resultados permitem concluir que, entre os herbicidas testados, o glyphosate foi o menos seletivo às espécies arbóreas, razão pela qual são sugeridas aplicações dirigidas desse produto. As espécies estudadas diferiram em relação à seletividade dos herbicidas avaliados. Para C. speciosa, o imazapyr foi o herbicida mais seletivo, seguido do sulfentrazone. O herbicida metribuzin foi seletivo para A. polyphylla. Quanto a E. contortisiliquum, o metribuzin foi menos tóxico, seguido pelo sulfentrazone. Para L. divaricata, somente o herbicida sulfentrazone foi seletivo.We aimed to evaluate the selectivity of the herbicides imazapyr, glyphosate, metribuzin, and sulfentrazone, when applied on four native species of semideciduous forests from southeastern Brazil: Acacia polyphylla and Enterolobium contortisiliquum (Fabaceae, and Ceiba speciosa and Luehea divaricata (Malvaceae. We did a randonmized design with four replicates per treatment: the application of imazapyr (125, 250, 500, 1000, 2000 and 3000 g ha-1, sulfentrazone (100

  10. St. Lucia.

    Science.gov (United States)

    1987-06-01

    The population of St Lucia was 123,000 in 1986, with an annual growth rate of 2%. The infant mortality rate stands at 22.2/1000 live births, and life expectancy is 70.3 years for males and 74.9 years for females. The literacy rate is 78%. St Lucia's labor force is allocated as follows: agriculture, 36.6%; industry and commerce, 20.1%; and services, 18.1%. The gross national product (GNP) was US$146 million in 1985, with an annual growth rate of 3% and a per capita GNP of $1071. St Lucia is a parliamentary democracy modeled on the British Westminster system. The island is divided into 16 parishes and 1 urban area (the capital, Castries). St Lucia is currently a politically stable country, although the high level of youth unemployment is a cause for concern. Ongoing stability may depend on the government's ability to provide services such as jobs and housing. The economy has evolved from a monocrop sugar plantation type to a diversified economy based on agriculture, industry, and tourism. Agriculture, dominated by the banana industry, is characterized by the participation of a large number of small and medium-sized enterprises. Industry is being encouraged through the provision of incentives such as tax rebates. The government is attempting to maintain a sound investment climate through a tripartite dialogue with the private sector and trade unions. Overall economic policy is predicated on the attraction of sound investments, by both local and foreign entities, to accelerate the rate of economic growth, solve the unemployment problem, and generate a solid balance-of-payments position.

  11. Propagação de Hancornia speciosa Gomes – Apocynaceae, por alporquia e micropropagação

    OpenAIRE

    Reis, Luis Lessi dos [UNESP

    2011-01-01

    A mangabeira Hancornia speciosa Gomes, pertencente à família Apocynaceae, considerada uma frutífera nativa do Brasil e encontrada em várias regiões do país. A propagação via sementes é a mais utilizada, porém perdem o poder germinativo assim que são retiradas do fruto, em função de sua recalcitrância. A propagação vegetativa por meio da estaquia também não se consolidou, em função do baixo percentual de enraizamento. Desta forma essa pesquisa teve por objetivo aprimorar o conhecimento técnico...

  12. Evaluation of the Effects of Mitragyna speciosa Alkaloid Extract on Cytochrome P450 Enzymes Using a High Throughput Assay

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    Raja Elina Raja Aziddin

    2011-08-01

    Full Text Available The extract from Mitragyna speciosa has been widely used as an opium substitute, mainly due to its morphine-like pharmacological effects. This study investigated the effects of M. speciosa alkaloid extract (MSE on human recombinant cytochrome P450 (CYP enzyme activities using a modified Crespi method. As compared with the liquid chromatography-mass spectrometry method, this method has shown to be a fast and cost-effective way to perform CYP inhibition studies. The results indicated that MSE has the most potent inhibitory effect on CYP3A4 and CYP2D6, with apparent half-maximal inhibitory concentration (IC50 values of 0.78 µg/mL and 0.636 µg/mL, respectively. In addition, moderate inhibition was observed for CYP1A2, with an IC50 of 39 µg/mL, and weak inhibition was detected for CYP2C19. The IC50 of CYP2C19 could not be determined, however, because inhibition was < 50%. Competitive inhibition was found for the MSE-treated CYP2D6 inhibition assay, whereas non-competitive inhibition was shown in inhibition assays using CYP3A4, CYP1A2 and CYP2C19. Quinidine (CYP2D6, ketoconazole (CYP3A4, tranylcypromine (CYP2C19 and furafylline (CYP1A2 were used as positive controls throughout the experiments. This study shows that MSE may contribute to an herb-drug interaction if administered concomitantly with drugs that are substrates for CYP3A4, CYP2D6 and CYP1A2.

  13. Antioxidant, Antimicrobial and Cytotoxic Properties as Well as the Phenolic Content of the Extract from Hancornia speciosa Gomes

    Science.gov (United States)

    Santos, Uilson P.; Campos, Jaqueline F.; Torquato, Heron Fernandes V.; Paredes-Gamero, Edgar Julian; Carollo, Carlos Alexandre; Estevinho, Leticia M.; de Picoli Souza, Kely

    2016-01-01

    Hancornia speciosa Gomes (Apocynaceae) is a fruit tree, popularly known as mangabeira, and it is widely distributed throughout Brazil. Several parts of the plant are used in folk medicine, and the leaf and bark extracts have anti-inflammatory, antihypertensive, antidiabetic, and antimicrobial properties. In this study, we investigated the chemical composition of the ethanolic extract of Hancornia speciosa leaves (EEHS) and its antioxidant, antimicrobial, and cytotoxic activities as well as the mechanisms involved in cell death. The chemical compounds were identified by liquid chromatography coupled to mass spectrometry (LC-MS/MS). The antioxidant activity of the EEHS was investigated using the method that involves the scavenging of 2,2-diphenyl-1-picrylhydrazyl free radicals as well as the inhibition of oxidative hemolysis and lipid peroxidation induced by 2,2’-azobis (2-amidinopropane) in human erythrocytes. The antimicrobial activity was determined by calculating the minimum inhibitory concentration, minimum bactericidal concentration, minimum fungicidal concentration, and zone of inhibition. Kasumi-1 leukemic cells were used to assess the cytotoxic activity and mechanisms involved in cell death promoted by the EEHS. The chemical compounds identified were quinic acid, chlorogenic acid, catechin, rutin, isoquercitrin, kaempferol-rutinoside, and catechin-pentoside. The EEHS demonstrated antioxidant activity via the sequestration of free radicals, inhibition of hemolysis, and inhibition of lipid peroxidation in human erythrocytes incubated with an oxidizing agent. The antimicrobial activity was observed against American Type Culture Collection (ATCC) and hospital strains of bacteria and fungi, filamentous fungi and dermatophytes. The cytotoxic activity of the EEHS was induced by apoptosis, reduction of the mitochondrial membrane potential, and activation of cathepsins. Together, these results indicate the presence of phenolic compounds and flavonoids in the EEHS

  14. Eficiência de extratos vegetais no controle de Diabrotica speciosa (Germar, 1824 (Coleoptera: Chrysomelidae, em laboratório

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    Junir Antonio Lutinski

    2010-04-01

    Full Text Available http://dx.doi.org/10.5007/2175-7925.2010v23n1p83 Vulgarmente conhecida como “vaquinha”, Diabrotica speciosa (Germar, 1824 ocorre na maioria dos estados brasileiros, destacando-se como uma das mais importantes pragas do feijoeiro e do milho. Visando avaliar a atividade inseticida de extratos brutos aquosos de nove espécies vegetais sobre os adultos deste inseto, realizou-se este trabalho. O experimento, conduzido em laboratório, foi realizado sob delineamento completamente casualizado, com dez tratamentos e quatro repetições. Para tal, utilizou-se um frasco, contendo em seu interior cinco espécimes adultos e uma folha de feijoeiro (Phaseolus vulgaris Linnaeus previamente imersa no extrato, tampado com um recorte de pano poroso e fixado por uma borracha. A variável avaliada foi número de espécimes de D. speciosa vivos. Os tratamentos consistiram em extratos de salvia (Salvia officinalis Linnaeus, cravo (Eugenia caryophyllata Thunb, noz-moscada (Myristica fragans Houtt, cinamomo (Melia azedarach Linnaeus, timbó (Ateleia glazioveana Baill, eucalipto (Eucalyptus citriodora Hook, canela (Cinnamomum zeylanicum Blume, figueira (Ficus microcarpa Linnaeus f., alecrim (Rosmarinus officinalis Linnaeus e a testemunha (apenas água destilada. As avaliações de sobrevivência foram realizadas a cada 24 horas, durante 10 dias. Sobre o número de espécimes vivos efetuou-se a análise de variância em bifatorial (10 extratos x 11 horários após a aplicação. As médias foram agrupadas pelo teste de Duncan ao nível de 5% de probabilidade de erro. Os extratos mais eficientes foram o timbó, noz-moscada e cinamomo, com porcentagens de eficiência variando entre 80,4% e 100%.

  15. Induction and Analysis of the Alkaloid Mitragynine Content of a Mitragyna speciosa Suspension Culture System upon Elicitation and Precursor Feeding

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    Nor Nahazima Mohamad Zuldin

    2013-01-01

    Full Text Available This study aimed to determine the effects of different concentrations and combinations of the phytohormones 2,4-dichlorophenoxy acetic acid (2,4-D, kinetin, 6-benzylaminopurine (BAP, and 1-naphthaleneacetic acid (NAA on callus induction and to demonstrate the role of elicitors and exogenous precursors on the production of mitragynine in a Mitragyna speciosa suspension culture. The best callus induction was achieved from petiole explants cultured on WPM that was supplemented with 4 mg L−1 2, 4-D (70.83%. Calli were transferred to liquid media and agitated on rotary shakers to establish Mitragyna speciosa cell suspension cultures. The optimum settled cell volume was achieved in the presence of WPM that contained 3 mg L−1 2,4-D and 3% sucrose (9.47±0.4667 mL. The treatment of cultures with different concentrations of yeast extract and salicylic acid for different inoculation periods revealed that the highest mitragynine content as determined by HPLC was achieved from the culture treated with 250 mg L−1 yeast extract (9.275±0.082 mg L−1 that was harvested on day 6 of culturing; salicylic acid showed low mitragynine content in all concentrations used. Tryptophan and loganin were used as exogenous precursors; the highest level of mitragynine production was achieved in cultures treated with 3 μM tryptophan and harvested at 6 days (13.226±1.98 mg L−1.

  16. Synthesis, characterization and application of Lagerstroemia speciosa embedded magnetic nanoparticle for Cr(VI) adsorption from aqueous solution.

    Science.gov (United States)

    Srivastava, Shalini; Agrawal, Shashi Bhushan; Mondal, Monoj Kumar

    2017-05-01

    Lagerstroemia speciosa bark (LB) embedded magnetic nanoparticles were prepared by co-precipitation of Fe 2+ and Fe 3+ salt solution with ammonia and LB for Cr(VI) removal from aqueous solution. The native LB, magnetic nanoparticle (MNP), L. speciosa embedded magnetic nanoparticle (MNPLB) and Cr(VI) adsorbed MNPLB particles were characterized by SEM-EDX, TEM, BET-surface area, FT-IR, XRD and TGA methods. TEM analysis confirmed nearly spherical shape of MNP with an average diameter of 8.76nm and the surface modification did not result in the phase change of MNP as established by XRD analysis, while led to the formation of secondary particles of MNPLB with diameter of 18.54nm. Characterization results revealed covalent binding between the hydroxyl group of MNP and carboxyl group of LB particles and further confirmed its physico-chemical nature favorable for Cr(VI) adsorption. The Cr(VI) adsorption on to MNPLB particle as an adsorbent was tested under different contact time, initial Cr(VI) concentration, adsorbent dose, initial pH, temperature and agitation speed. The results of the equilibrium and kinetics of adsorption were well described by Langmuir isotherm and pseudo-second-order model, respectively. The thermodynamic parameters suggest spontaneous and endothermic nature of Cr(VI) adsorption onto MNPLB. The maximum adsorption capacity for MNPLB was calculated to be 434.78mg/g and these particles even after Cr(VI) adsorption were collected effortlessly from the aqueous solution by a magnet. The desorption of Cr(VI)-adsorbed MNPLB was found to be more than 93.72% with spent MNPLB depicting eleven successive adsorption-desorption cycles. Copyright © 2016. Published by Elsevier B.V.

  17. Inhibition of growth of microcultured Hancornia speciosa shoots by 3beta-hydroxylated gibberellins and one of their C-3 deoxy precursors.

    Science.gov (United States)

    Pereira-Netto, A B; McCown, B H; Pharis, R P

    2003-01-01

    Gibberellins (GAs) A(1), A(3), A(4) and A(7), all 3beta-hydroxylated, growth-active GAs, significantly inhibited shoot elongation and the formation of nodes in in vitro-grown Hancornia speciosa, as did GA(20), a 3-deoxy precursor of GA(1). Ancymidol, an early-stage inhibitor of GA biosynthesis, significantly retarded shoot elongation without affecting the formation of nodes. Co-application of ancymidol and GA(1 )did not overcome the ancymidol-induced growth retardation. Trinexapac-ethyl, which can inhibit 3beta-hydroxylation (GA activation) and 2beta-hydroxylation (GA inactivation), gave no significant response on either shoot elongation or node formation, while two isomers of 16,17-dihydro GA(5), also inhibitors of GA 3beta-hydroxylation, significantly inhibited both shoot growth and the formation of nodes. These unusual results may indicate a unique metabolism for GAs in microcultured shoots of H. speciosa.

  18. Solar catalysed activity against methyl orange dye, cytotoxicity activity of MCF-7 cell lines and identification of marker compound by HPTLC of Lagerstroemia speciosa.

    Science.gov (United States)

    Sai Saraswathi, V; Rajaguru, P; Santhakumar, K

    2017-05-01

    The investigation was aimed to quantify the Gallic acid present in Lagerstroemia speciosa leaves (Lythraceae). The High-Performance Thin Layer Chromatography (HPTLC) quantification was performed for acetone (AE), methanolic (ME) and chloroform (CE) extract of leaves of L. speciosa. The pre-coated silica gel 60 F 254 was used for complete separation of compounds using the mobile phase pet. Ether: ethyl acetate: formic acid (5:5:1v/v).The validation of the extracts was carried out using ICH guidelines for precision, repeatability and accuracy showing the Rf 0.49 against standard Gallic acid. Linearity range for Gallic acid was done from 200 to 1000ng/spot (AE) and200 ng to 600ng/spot (ME), with Correlation, coefficient r=0.99 (AE) and 0.54 (ME) in the said concentrations. The composition in crude leaf extract was determined to be of 49.712mg (AE) and 20.125mg (ME), while it was not found in chloroform extract against standard Gallic acid. Hence the proposed method was very simple, precise, accurate and easy for the screening of the bioactive compounds present in the acetone and methanolic extracts of the leaves of L. speciosa. It was observed that the acetone extract subjected to cytotoxicity showed promising activity at higher concentrations (100 and 200μg/ml) showed 92.9% and 87.13% inhibition against MCF-7 cell lines respectively. The photocatalytic activity of the acetone and methanolic extracts of methyl orange was found to be 90.25% (190min) and 89.03% (180min) respectively. Therefore this can be used as an indicator of purity of herbal drugs and formulation containing L. speciosa. Copyright © 2017 Elsevier B.V. All rights reserved.

  19. Physical habitat predictors of Manayunkia speciosa distribution in the Klamath River and implications for management of Ceratomyxa shasta, a parasite with a complex life cycle

    Science.gov (United States)

    Jordan, M. S.; Alexander, J. D.; Grant, G. E.; Bartholomew, J. L.

    2011-12-01

    Management strategies for parasites with complex life cycles may target not the parasite itself, but one of the alternate hosts. One approach is to decrease habitat for the alternate host, and in river systems flow manipulations may be employed. Two-dimensional hydraulic models can be powerful tools for predicting the relationship between flow alterations and changes in physical habit, however they require a rigorous definition of physical habitat for the organism of interest. We present habitat characterization data for the case of the alternate host of a salmonid parasite and introduce how it will be used in conjunction with a 2-dimensional hydraulic model. Ceratomyxa shasta is a myxozoan parasite of salmonids that requires a freshwater polychaete Manayunkia speciosa to complete its life cycle. Manayunkia speciosa is a small (3mm) benthic filter-feeding worm that attaches itself perpendicularly to substrate through construction of a flexible tube. In the Klamath River, CA/OR, C. shasta causes significant juvenile salmon mortality, imposing social and economic losses on commercial, sport and tribal fisheries. An interest in manipulating habitat for the polychaete host to decrease the abundance of C. shasta has therefore developed. Unfortunately, there are limited data on the habitat requirements of M. speciosa or the influence of streamflow regime and hydraulics on population dynamics and infection prevalence. This work aims to address these data needs by identifying physical habitat variables that influence the distribution of M. speciosa and determining the relationship between those variables, M. speciosa population density, and C. shasta infection prevalence. Biological samples were collected from nine sites representing three river features (runs, pools, and eddies) within the Klamath River during the summer and fall of 2010 and 2011. Environmental data including depth, velocity, and substrate, were collected at each polychaete sampling location. We tested

  20. Métodos de extração e concentrações no efeito inseticida de Ruta graveolens L., Artemisia verlotorum Lamotte e Petiveria alliacea L. a Diabrotica speciosa Germar Extraction methods and concentrations for the insecticidal effect of Ruta graveolens L., Artemisia verlotorum Lamotte, and Petiveria alliacea L. against Diabrotica speciosa Germar

    Directory of Open Access Journals (Sweden)

    F.S. Barbosa

    2009-01-01

    Full Text Available O objetivo deste trabalho foi determinar o melhor método de extração e concentração para Ruta graveolens L. (Rutaceae, Artemisia verlotorum Lamotte (Asteraceae e Petiveria alliacea L. (Phytolaccaceae quanto ao efeito inseticida a Diabrotica speciosa Germar (Coleoptera: Chrysomelidae. Os extratos que utilizaram óleo de soja comercial, pelo menos como um dos solventes, apresentaram maior mortalidade de D. speciosa em suas testemunhas (solvente = óleo, nas três plantas estudadas, em relação às suas concentrações. O extrato aquoso de R. graveolens, a 5% de concentração, apresentou maior mortalidade corrigida de D. speciosa (32,5% que os extratos de A. verlotorum em água (10% de concentração (20,3% e P. alliacea em álcool etílico (2% de concentração (12,5%. O método de extração com água é simples, sendo passível de utilização por pequenos agricultores. A R. graveolens é planta facilmente cultivada, sendo, portanto, boa alternativa de controle dessa praga.The aim of this work was to determine the best extraction method and concentration for Ruta graveolens L. (Rutaceae, Artemisia verlotorum Lamotte (Asteraceae and Petiveria alliacea L. (Phytolaccaceae concerning their insecticidal effect against Diabrotica speciosa Germar (Coleoptera: Chrysomelidae. Extracts using commercial soybean oil as at least one of the solvents resulted in higher D. speciosa mortality in controls (solvent = oil of the three studied plants, relative to their treatment concentrations. R. graveolens extract in water, at 5% concentration, showed higher D. speciosa corrected mortality (32.5% than A. verlotiorum extracts in water (10% concentration (20.3% and P. alliacea in ethanol (2% concentration (12.5%. The extraction method with water is simple and can be used by small farmers. R. graveolens is an easily cultivated plant and constitutes, therefore, a good alternative to control this plague.

  1. PHYSICOCHEMICAL PROPERTIES OF THE PROTEOLYTIC ENZYME FROM THE LATEX OF THE MILKWEED, ASCLEPIAS SPECIOSA TORR. SOME COMPARISONS WITH OTHER PROTEASES

    Science.gov (United States)

    Winnick, Theodore; Davis, Alva R.; Greenberg, David M.

    1940-01-01

    1. A study has been made of the properties of a hitherto unreported proteolytic enzyme from the latex of the milkweed, Asclepias speciosa. The new protease has been named asclepain by the authors. 2. The results of chemical, diffusion, and denaturation tests indicate that asclepain is a protein. 3. Like papain, asclepain dots milk and digests most proteins, particularly if they are dissolved in concentrated urea solution. Unlike papain, asclepain did not clot blood. 4. The activation and inhibition phenomena of asclepain resemble those of papain, and seem best explained on the assumption that free sulfhydryl in the enzyme is necessary for proteolytic activity. The sulfhydryl of asclepain appears more labile than that of papain. 5. The measurement of pH-activity curves of asclepain on casein, ovalbumin, hemoglobin, edestin, and ovovitellin showed no definite digestion maxima for most of the undenatured proteins, while in urea solution there were well defined maxima near pH 7.0. Native hemoglobin and ovovitellin were especially undigestible, while native casein was rapidly attacked. 6. Temperature-activity curves were determined for asclepain on hemoglobin, casein, and milk solutions. The optimum temperature was shown to increase with decreasing time of digestion. PMID:19873154

  2. Notes from the Field: Kratom (Mitragyna speciosa) Exposures Reported to Poison Centers - United States, 2010-2015.

    Science.gov (United States)

    Anwar, Mehruba; Law, Royal; Schier, Josh

    2016-07-29

    Kratom (Mitragyna speciosa) is a plant consumed throughout the world for its stimulant effects and as an opioid substitute (1). It is typically brewed into a tea, chewed, smoked, or ingested in capsules (2). It is also known as Thang, Kakuam, Thom, Ketum, and Biak (3). The Drug Enforcement Administration includes kratom on its Drugs of Concern list (substances that are not currently regulated by the Controlled Substances Act, but that pose risks to persons who abuse them), and the National Institute of Drug Abuse has identified kratom as an emerging drug of abuse (3,4). Published case reports have associated kratom exposure with psychosis, seizures, and deaths (5,6). Because deaths have been attributed to kratom in the United States (7), some jurisdictions have passed or are considering legislation to make kratom use a felony (8). CDC characterized kratom exposures that were reported to poison centers and uploaded to the National Poison Data System (NPDS) during January 2010-December 2015. The NPDS is a national database of information logged by the country's regional poison centers serving all 50 United States, the District of Columbia, and Puerto Rico and is maintained by the American Association of Poison Control Centers. NPDS case records are the result of call reports made by the public and health care providers.

  3. DYEING SILK FABRICS WITH STINK BEAN POD (PARKIA SPECIOSA HASSK. NATURAL DYE IN THE COLOR FASTNESS AND UV PROTECTION

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    M. MASAE

    2017-07-01

    Full Text Available This paper describes natural dye extracted from stink bean pod (Parkia speciosa Hassk. which was dyed on the silk fabric. The mordants as aluminum potassium sulfate, iron chloride, sodium hydroxide and mud were used to dye fabric using three different dyeing methods: pre-mordanting, meta-mordanting and post-mordanting. The color fastness to washing, water, perspiration, light and crocking of the dyed samples was determined according to AATCC test methods. In this study the UV-protection properties on silk fabrics were investigated. The chemical functional groups of the dyes were characterized by Fourier transform infrared spectroscopy (FTIR. The results revealed that the dyeing silk fabrics with stink beans pod were fair to good fastness to washing and crocking and very poor to poor light fastness with the exception of samples mordanted with iron chloride. The water and perspiration fastness ratings were fair to good. Silk fabrics mordanted with iron chloride and dyed with stink bean usually showed good UV-protection levels even if undyed. These extracts gave polyphenolic, betalain dye and chlorophyll content. Therefore, it was suggested that stink bean pod has the potential in producing functional dyes that could be imparted into the silk dyeing natural colorant system.

  4. Impact of the nutrients N and K and soluble sugars on Diabrotica speciosa (Germar) (Coleoptera, Chrysomelidae) and Agrotis ipsilon (Hufnagel) (Lepidoptera, Noctuidae) populations in potato crops, Solanum tuberosum L. (Solanaceae); Impacto dos nutrientes N e K e de acucares soluveis sobre populacoes de Diabrotica speciosa (Germar) (Coleoptera, Chrysomelidae) e Agrotis ipsilon (Hufnagel) (Lepidoptera, Noctuidae) na cultura da batata, Solanum tuberosum L. (Solanaceae)

    Energy Technology Data Exchange (ETDEWEB)

    Azeredo, Edson Henrique de [Universidade Federal Fluminense (UFF), Pinheiral, RJ (Brazil). Pro-Reitoria de Extensao], e-mail: edsonhenrique.azeredo@bol.com.br; Lima, Eduardo [Universidade Federal Rural do Rio de Janeiro (UFRRJ), Seropedica, RJ (Brazil). Inst. de Agronomia. Dept. de Solos; Cassino, Paulo Cesar Rodrigues [Universidade Federal Rural do Rio de Janeiro (UFRRJ), Seropedica, RJ (Brazil). Inst. de Biologia. Centro Integrado de Manejo de Pragas C.R.G.

    2004-03-15

    Impact of the nutrients N and K and soluble sugars on Diabrotica speciosa (Germar) (Coleoptera, Chrysomelidae) and Agrotis ipsilon (Huefnagel) (Lepidoptera, Noctuidae) populations in potato crops, Solanum tuberosum L. (Solanaceae). The occurrence of Diabrotica speciosa (Germar, 1824) and Agrotis ipsilon (Huefnagel, 1767) on the potato cultivars Achat and Monalisa, influenced by nitrogen and potassium dosage, and minimum quantity of soluble sugars, was studied. The following parameters were evaluated: concentration of mineral nutrient and sugar in green leaf, senescent leaf, leaf in abscission, stem, tubercle and total plant using extracts of infusion in ethanol 80%. The largest infestation of D. speciosa larvae was on Monalisa cultivar at 150 kg.ha{sup -1} of N + K with 27.03% at P< 0,05. It was observed that the effect of the dosage of N + K in the increment of the concentration of soluble sugars increased the damages in the tubercles and stems by A. ipsilon. The infestation by these species increased to 58.82% on the Monalisa cultivar, when the nitrogen dosage increased from zero to 150 kg.ha{sup -1}, in the absence of potassium. On the other hand, high dosage of K reduced the damages by A. ipsilon on Monalisa cultivar. However, it did not influence the storage of soluble sugar. The results indicated that in Achat cultivar the accumulated soluble sugar was reduced, probably sensitized by elevation of potassic fertilization dosing, differing from Monalisa cultivar, in which the influence was by nitrogen dosing. (author)

  5. Isolation of quercetin from the methanolic extract of Lagerstroemia speciosa by HPLC technique, its cytotoxicity against MCF-7 cells and photocatalytic activity.

    Science.gov (United States)

    Sai Saraswathi, V; Saravanan, D; Santhakumar, K

    2017-06-01

    The flavonoids present in the leaves of Lagerstroemia speciosa were extracted, characterized by spectral methods and studied for its cytotoxicity activity against MCF-cell lines and photocatalytic activity against azo dye. Direct and sequential soxhlet extraction was performed and its concentrated crude extract was subjected to high performance liquid chromatography. The yield obtained by the isolated compound (MEI-quercetin) from leaves of L. speciosa was found to be 1.8g from the methanolic extract. The phytochemical analysis and the Rf value of the isolated flavonoid was found to be 3.59. The isolated compound was characterized by Infrared Spectroscopy, NMR and Mass. Based on the characterization, the structure was elucidated as quercetin - a flavonoid. The isolated compound showed the significant in vitro cytotoxicity activity against MCF-7 cell lines at 500μg/ml when compared to the crude extract. Among the various concentrations (25, 50, 100, 250, and 500μg/ml), at higher concentration the cell viability was pronounced and also compared with that of the control. It was first time to report that the isolated flavonoid showed photocatalytic against azo dye-methyl orange. The dye degradation was monitored by UV-Vis spectrophotometry. The isolated compound showed dye degradation of 91.66% with the crude extract 82.47% at 160min. Hence in the present findings, the photocatalytic degradation of MO dye under UV irradiation was investigated over isolated compound of L. speciosa. Hence we expect that this can be used to treat the waste water in near future based on the photocatalytic technique. Copyright © 2017 Elsevier B.V. All rights reserved.

  6. Previsão de ocorrência de Diabrotica speciosa utilizando-se o modelo de graus-dia de laboratório

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    Ávila Crébio José

    2002-01-01

    Full Text Available Foram determinadas, neste trabalho, as exigências térmicas (graus-dia e a previsão de ocorrência de adultos de Diabrotica speciosa (Coleoptera: Chrysomelidae em condições de campo (telado. Empregaram-se as temperaturas do solo e do ar no modelo linear de graus-dia, determinado para o inseto em condições de laboratório. O número de graus-dia acumulados para o desenvolvimento de D. speciosa foi determinado efetuando-se o somatório diário de unidades térmicas, a partir da temperatura-base de desenvolvimento (11,04ºC, utilizando-se, como dieta de larvas, raízes de milho cultivado em vasos. O valor da constante térmica (K foi empregado para determinar a previsão de ocorrência do inseto, com base nas temperaturas médias do solo e do ar, registradas durante o período experimental. Independentemente do ambiente em que a temperatura foi registrada (ar ou solo, os valores de graus-dia acumulados para o desenvolvimento de D. speciosa foram significativamente inferiores ao valor de K obtido no laboratório. As temperaturas do solo (registradas ou estimadas a partir da do ar e a do ar proporcionaram uma previsão de ocorrência do inseto significativamente diferente da observada experimentalmente. Todavia, a previsão de ocorrência com base na temperatura do ar foi mais discrepante em relação à observada experimentalmente, do que quando as temperaturas do solo (registradas ou estimadas foram empregadas.

  7. Initial growth of six forest tree species in differents spacing conditions

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    Daniel Ferreira do Nascimento

    2012-03-01

    Full Text Available This work veriflied the influence of planting spacing on the initial growth of six forest species, at the age of 22 months, in plantations of forest recomposition in the Guandu River Basin. The experiment was installed in the SFE - thermoelectric power plants Barbosa Lima Sobrinho, located in the City of Seropédica-RJ. Forty eight tree species were planted, using the spacings, 1.0 x 1.0, 1.5 x 1.5, 2.0 and 2.0 x 3.0 x 2.0 m, which are the study treatments. At 22 months after planting, it was evaluated the growth in height, diameter at ground level (DNS and area of the canopy for the species, Anadenanthera macrocarpa Benth. Brenan (angico vermelho, Schinus terebinthifolius Raddi (aroeira pimenteira, Schizolobium parahyba Blake (guapuruvu Chorisia speciosa St. Hill (paineira, Cordia sp. (babosa branca and Inga marginata (ingá. It was found that the studied species behaved in a different way in the differents spacing of planting, and that the planting density significantly influenced on the initial growth of all the species. In general, in wider planting spacings, the plants had higher growth.

  8. Facile biosynthesis, characterization, and solar assisted photocatalytic effect of ZnO nanoparticles mediated by leaves of L. speciosa.

    Science.gov (United States)

    Sai Saraswathi, V; Tatsugi, J; Shin, Paik-Kyun; Santhakumar, K

    2017-02-01

    Synthesis of metal oxide nanoparticles using novel methodologies always attracts great importance in research. The use of plant extract to synthesize nano-particle has been considered as one of the eco-friendly methods. This paper describes the biosynthetic route of preparation of zinc oxide nanoparticles (ZnO NPs) from the Lagerstroemia speciosa leaf extract. This approach appears to be low-cost preparation and alternative method to conventional methods. Highly stable and hexagonal phase ZnO NPs with average particle size of 40nm were synthesized and characterized by UV-Vis absorption spectroscopy (surface Plasmon resonance), Fourier transform infrared spectroscopy (surface functionalities), X-ray Diffraction analysis (crystallinity), TEM and SEM (size and morphology), Energy Dispersive X-ray spectroscopy (elemental composition), Thermogravimetric analysis (weight loss) and Zeta potential (stability). The preliminary phytochemical experiments identify the possible chemical groups present in leaves extract. The photocatalytic properties of ZnO NPs were studied using UV-Vis spectroscopy by exposing methyl orange to sunlight and it is found to be degraded up to 93.5% within 2h. The COD values were significantly reduced from 5600mg/L to 374mg/L after 100min of solar radiation. The hemolytic activity of synthesized zinc oxide nanoparticles was performed on human erythrocyte cells. Thus the present study provides a simple and eco-friendly method for the preparation of multifunctional property of ZnO NPs utilizing the biosynthetic route. Copyright © 2016 Elsevier B.V. All rights reserved.

  9. A casual alien plant new to Mediterranean Europe: Ceiba speciosa (Malvaceae in the suburban area of Palermo (NW Sicily, Italy

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    Pasta, Salvatore

    2014-12-01

    Full Text Available The abiotic and biotic characteristics of the first sites where floss silk tree behaves as a casual alien plant in the Mediterranean Europe are described. The species was probably first planted in botanical gardens of southern France few decades before mid XIX century. It was introduced in Palermo in 1896, a city which appears to match very well its climatic requirements. According to the available information on its biology and ecology in both its original and secondary range, the floss silk tree should not become an invasive alien plant in the Mediterranean. Nevertheless, several gaps need to be filled in order to increase our understanding of future trends of Ceiba speciosa in southern Europe, in particular, the eventual role of pollinators and seed dispersers outside the species’ natural range.Se describen las caracteristicas abióticas y bióticas de los primeros sitios del mediterráneo europeo donde el árbol palo borracho se encuentra creciendo como especie alóctona casual. Con respecto a la historia de su introducción, esta especie fue probablemente plantada en los jardines botánicos del sur de Francia unos pocos decenios antes de la mitad del siglo XIX. En 1896, sin embargo, fue introducida en Palermo, ciudad que parece satisfacer muy bien sus requerimientos climáticos. De acuerdo con la información disponible, tanto dentro como fuera de su área de distribución natural, el palo borracho no debería convertirse en planta invasora en el mediterráneo. Sin embargo, algunos vacíos de información deben ser completados antes de establecer su potencial invasor de una manera definitiva, particularmente, el posible papel de agentes polinizadores y dispersores fuera del área de distribución natural de la especie.

  10. In vivo antioxidant and antiulcer activity of Parkia speciosa ethanolic leaf extract against ethanol-induced gastric ulcer in rats.

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    Rami Al Batran

    Full Text Available BACKGROUND: The current study was carried out to examine the gastroprotective effects of Parkia speciosa against ethanol-induced gastric mucosa injury in rats. METHODOLOGY/PRINCIPAL FINDINGS: Sprague Dawley rats were separated into 7 groups. Groups 1-2 were orally challenged with carboxymethylcellulose (CMC; group 3 received 20 mg/kg omeprazole and groups 4-7 received 50, 100, 200 and 400 mg/kg of ethanolic leaf extract, respectively. After 1 h, CMC or absolute ethanol was given orally to groups 2-7. The rats were sacrificed after 1 h. Then, the injuries to the gastric mucosa were estimated through assessment of the gastric wall mucus, the gross appearance of ulcer areas, histology, immunohistochemistry and enzymatic assays. Group 2 exhibited significant mucosal injuries, with reduced gastric wall mucus and severe damage to the gastric mucosa, whereas reductions in mucosal injury were observed for groups 4-7. Groups 3-7 demonstrated a reversal in the decrease in Periodic acid-Schiff (PAS staining induced by ethanol. No symptoms of toxicity or death were observed during the acute toxicity tests. CONCLUSION: Treatment with the extract led to the upregulation of heat-shock protein 70 (HSP70 and the downregulation of the pro-apoptotic protein BAX. Significant increases in the levels of the antioxidant defense enzymes glutathione (GSH and superoxide dismutase (SOD in the gastric mucosal homogenate were observed, whereas that of a lipid peroxidation marker (MDA was significantly decreased. Significance was defined as p<0.05 compared to the ulcer control group (Group 2.

  11. Sterilization of males Diabrotica speciosa (Coleoptera: Chrysomelidae) with gamma irradiation for control in cultures of economic importance

    International Nuclear Information System (INIS)

    Araujo, Marcio Martins

    2017-01-01

    Diabrotica speciosa (Germar, 1824), causes direct and indirect damage on crops by feeding and acting as virus vector for diverse groups of plants. The main control form is the use of agrochemicals so, aiming to manage the population without environment impact, the present work had as objective to determine the dose of gamma radiation that provides male sterility, its foliar consumption and gonads histological changes. Adult males were submitted to gamma radiation ( 60 Co) on the third day after emergence at doses of 0, 25, 50, 75 and 100 Gy at 0,808 KGy/ hour rate, totaling 20 replicates/ dose. The sterilizing dose was based on the fertility of sexually mature non-irradiated females mated by irradiated males. The couples were individualized in 'arenas' and fed with leaflets Phaseolus vulgaris L. with black gauze moistened for oviposition. Eggs were treated and arranged in plastic containers lined with filter paper. After hatching, larvae were transferred to a larger container with a cover cap containing fine vermiculite and maize seedlings (Zea mays L.), which were replaced every 10 days, until adult emergence. After the 4 th day of irradiation, a leaf disc with 3.2 cm in diameter was available for 24 hours for each couple. The discs were scanned and analyzed in ImageJ software. To evaluate the gonads, 3 males with 8 days of age were used per dose. They were dissected in PBS, through the Hematoxylin-Eosin technique the laminas were evaluated under an optical microscope. We observed that male sterility occurred from 75 Gy and the average longevity of this group was of 12.5 days. Consumption of the leaf area by couples composed by a sterile male was 42.9% and the testicular histological analysis demonstrated tissue disorganisation and gaps between germ cells at the highest doses of 75 Gy and 100 Gy. (author)

  12. Comparison of three chromatographic techniques for the detection of mitragynine and other indole and oxindole alkaloids in Mitragyna speciosa (kratom) plants.

    Science.gov (United States)

    Wang, Mei; Carrell, Emily J; Ali, Zulfiqar; Avula, Bharathi; Avonto, Cristina; Parcher, Jon F; Khan, Ikhlas A

    2014-06-01

    Leaves of the Southeast Asian plant Mitragyna speciosa are used to suppress pain and mitigate opioid withdrawal syndromes. The potential threat of abuse and ready availability of this uncontrolled psychoactive plant have led to the need for improved analytical techniques for the detection of the major active components, mitragynine and 7-hydroxymitragynine. Three independent chromatographic methods coupled to two detection systems, GC with MS, supercritical fluid chromatography with diode array detection, and HPLC with MS and diode array detection, were compared for the analysis of mitragynine and other indole and oxindole alkaloids in M. speciosa plants. The indole alkaloids included two sets of diastereoisomers: (i) paynantheine and 3-isopaynantheine and (ii) mitragynine, speciogynine, and speciociliatine. Two oxindole alkaloid diastereoisomers, corynoxine and corynoxine B, were also studied. The HPLC and supercritical fluid chromatography methods successfully resolved the major components with slightly different elution orders. The GC method was less satisfactory because it was unable to resolve mitragynine and speciociliatine. This separation was difficult by GC with a liquid stationary phase because these diastereoisomers differ only in the orientation of an interior hydrogen atom. The observed lack of resolution of the indole alkaloid diastereoisomers coupled with the likeness of the mass and tandem mass spectra, calls into question proposed GC methods for the analysis of mitragynine based on solely GC with MS separation and identification. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  13. PXR mediated induction of CYP3A4, CYP1A2, and P-gp by Mitragyna speciosa and its alkaloids.

    Science.gov (United States)

    Manda, Vamshi K; Avula, Bharathi; Dale, Olivia R; Ali, Zulfiqar; Khan, Ikhlas A; Walker, Larry A; Khan, Shabana I

    2017-12-01

    Kratom (Mitragyna speciosa), a native herb of Southeast Asia, is widely known for its psychoactive properties. Recent increase in the use of kratom as a recreational drug has increased the risk of its interaction with conventional drugs if taken concomitantly. A few reports are available related to the effects of kratom on the activity of cytochrome P450 enzymes (CYPs), but there are no reports of its effects on pregnane X receptor (PXR), a transcription factor that regulates the expression of CYPs and P-glycoprotein (P-gp). This study was carried out to evaluate the effects of a methanolic extract of kratom leaves, an alkaloid rich fraction and its 5 indole and 4 oxindole alkaloids on PXR activation and the resulting changes in the mRNA expression of PXR target genes (CYP3A4, CYP1A2, and P-gp). A significant activation of PXR was observed by the extract (3-fold), alkaloidal fraction (4-fold) and all 9 alkaloids (4- to 6-fold) that was associated with an increased mRNA expression which resulted into an increase in the activity of CYP3A4, CYP1A2, and P-gp. These results indicate that high consumption of Mitragyna speciosa extract along with the conventional drugs may lead to potential herb-drug interactions due to its effects on PXR. Copyright © 2017 John Wiley & Sons, Ltd.

  14. Expressões ecofisiológicas de germoplasma de Hancornia speciosa Gomes cultivado no Litoral de Pernambuco Physiological expressions in Hancornia speciosa Gomes germoplasm from the coastal region, Pernambuco, Brazil

    Directory of Open Access Journals (Sweden)

    Rejane Jurema Mansur Custódio Nogueira

    1999-12-01

    Full Text Available Objetivou-se avaliar in loco as relações hídricas e respectivas correlações em quatro acessos de mangaba (M-UFRPE 1, M-UFRPE 2, M-UFRPE 3 e M-UFRPE 4 cultivados na região litorânea do Estado de Pernambuco. As medidas foram tomadas em folhas adultas, completamente expandidas, em duas situações de exposição à luminosidade: exposição solar plena e sombreamento natural. As variáveis analisadas foram: temperatura foliar (Tf, transpiração (E e resistência difusiva (Rs. Verificou-se que as folhas sombreadas de M-UFRPE 2 transpiraram mais do que as expostas diretamente ao sol, diferindo do comportamento dos demais acessos. A Rs em folhas expostas ao sol variou de 1,1 a 4,5s.cm-1, enquanto que nas folhas sombreadas, essa variação foi de 1,7 a 3,5s.cm-1. Os efeitos de ExRs foram inversos e altamente significativos para ambos os tratamentos estudados. Para as folhas expostas ao sol, a Tf, e a E foram influenciadas muito mais pela umidade relativa do que pela radiação fotossinteticamente ativa.A study was carried out with tropical fruit germoplasm (Hancornia speciosa Gomes to evaluate "in loco" water relations and their respectives correlations in four acesses (M-UFRPE 1, M-UFRPE 2, M-UFRPE 3 and M-UFRPE 4 cultivated at the coastal region, in Brazil. The datas were taken from fully expanded adults leaves. Two treatments were studied: leaves fully exposed to the sun and shadow leaves. The following characters were analized: leaf temperature (Tf, transpiration (E and diffusive resistance (Rs. The shadow leaves of the M-UFRPE 2 showed higher transpiration rate than fully exposed leaves to the sun. This behaviour was different compared to the other treatment. The variation between fully exposed leaves to the sun and shadow leaves for Rs was 1.1 to 4.5s.cm-1 and 1.7 to 3.5s.cm-1, respectively. The ExRs correlation was more significant and negative. The Tf and E correlation was longer influenced by relative humidity than photosynthetically

  15. Feeding behavior of hummingbirds and perching birds on Erythrina speciosa Andrews (Fabaceae flowers in an urban area, Londrina, Paraná, Brazil Comportamento alimentar de beija-flores e Passeriformes nas flores de Erytrhina speciosa Andrews (Fabaceae em uma área urbana de Londrina, Paraná, Brasil

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    Luciana Baza Mendonça

    2006-03-01

    Full Text Available Nine species of birds - seven hummingbirds (Trochilidae and two Passeriformes - were observed visiting the flowers of Erythrina speciosa Andrews (Fabaceae, a hummingbird-pollinated species present on the campus of Londrina State University, Paraná State, Brazil. Nectar in bagged flowers bore little relationship with nectar in flowers opened to foragers either regarding quantity or diurnal pattern of availability. Birds were more frequent early in the morning and their activity on flowers further declined, apparently following the pattern of nectar availability. The manner to which birds probed the flowers and, in consequence, their role on pollination were greatly determined by morphological traits and approaching behavior of birds. E. speciosa seemed best suited for pollination by long-billed hummingbirds but some short to medium-billed species may play some role on its pollination.Nove espécies de aves - sete beija-flores (Trochilidae e duas aves Passeriformes - foram observados visitando as flores de Erythrina speciosa Andrews (Fabaceae, uma espécie polinizada por beija-flores presente no campus da Universidade Estadual de Londrina, Paraná, Brasil. O néctar em flores ensacadas apresentou pouca relação com aquele em flores expostas aos visitantes, tanto em termos de quantidade como em temos de padrão diurno de disponibilidade. As aves foram mais freqüentes de manhã e sua atividade nas flores diminuiu no transcorrer do dia, coincidindo com o padrão de disponibilidade de néctar. O comportamento de visita das aves e, em conseqüência, sua atuação na polinização da espécie foram em grande parte determinadas por características morfológicas e comportamentais destas. E. speciosa parece ser adaptada para polinização por beija-flores de bicos longos, embora espécies com bicos de comprimento curto a médio possam ter algum papel em sua polinização.

  16. A δ(15)N assessment of nitrogen deposition for the endangered epiphytic orchid Laelia speciosa from a city and an oak forest in Mexico.

    Science.gov (United States)

    Díaz-Álvarez, Edison A; Reyes-García, Casandra; de la Barrera, Erick

    2016-09-01

    Atmospheric nitrogen deposition poses a major threat to global biodiversity. Tropical epiphytic plants are especially at risk given their reliance on atmospheric sources of nutrients. The leaf, pseudobulb, and root carbon and nitrogen content, C:N ratio, as well as the nitrogen isotopic composition were studied for individuals of Laelia speciosa from a city and from an oak forest in Mexico. The nitrogen content of leaves was similar between the city and the oak forest, reaching 1.3 ± 0.2 % (dry mass). The δ(15)N of leaves, pseudobulbs, and roots reached 5.6 ± 0.2 ‰ in the city, values found in sites exposed to industrial and vehicular activities. The δ(15)N for plant from the oak forest amounted to -3.1 ± 0.3 ‰, which is similar to values measured from sites with low industrial activities. Some orchids such as Laelia speciosa produce a single pseudobulb per year, i.e., a water and nutrient storage organ, so the interannual nitrogen deposition was studied by considering the ten most recent pseudobulbs for plants from either site formed between 2003 and 2012. The C:N ratio of the ten most recent pseudobulbs from the oak forest, as well as that of the pseudobulbs formed before 2010 for plants in the city were indistinguishable from each other, averaging 132.4 ± 6.5, while it was lower for the two most recent pseudobulbs in the city. The δ(15)N values of pseudobulbs from the oak forest averaged ‒4.4 ± 0.1 ‰ for the entire series. The δ(15)N ranged from 0.1 ± 1.6 ‰ for the oldest pseudobulb to 4.7 ± 0.2 ‰ for the pseudobulb formed in the city from 2008 onwards. Isotopic analysis and the C:N ratio for L. speciosa revealed that rates of nitrogen deposition were higher in the city than in the forest. The δ(15)N values of series of pseudobulbs showed that it is possible to track nitrogen deposition over multiple years.

  17. Antioxidant and anti-inflammatory activities of extracts from Cassia alata, Eleusine indica, Eremomastax speciosa, Carica papaya and Polyscias fulva medicinal plants collected in Cameroon.

    Science.gov (United States)

    Sagnia, Bertrand; Fedeli, Donatella; Casetti, Rita; Montesano, Carla; Falcioni, Giancarlo; Colizzi, Vittorio

    2014-01-01

    The vast majority of the population around the world has always used medicinal plants as first source of health care to fight infectious and non infectious diseases. Most of these medicinal plants may have scientific evidence to be considered in general practice. The aim of this work was to investigate the antioxidant capacities and anti-inflammatory activities of ethanol extracts of leaves of Cassia alata, Eleusine indica, Carica papaya, Eremomastax speciosa and the stem bark of Polyscias fulva, collected in Cameroon. Chemiluminescence was used to analyze the antioxidant activities of plant extracts against hydrogen peroxide or superoxide anion. Comet assays were used to analyze the protection against antioxidant-induced DNA damage induced in white blood cells after treating with hydrogen peroxide. Flow cytometry was used to measure γδ T cells proliferation and anti-inflammatory activity of γδ T cells and of immature dendritic cells (imDC) in the presence of different concentrations of plant extracts. Ethanol extracts showed strong antioxidant properties against both hydrogen peroxide and superoxide anion. Cassia alata showed the highest antioxidant activity. The effect of plant extracts on γδ T cells and imDC was evidenced by the dose dependent reduction in TNF-α production in the presence of Cassia alata, Carica papaya, Eremomastax speciosa Eleusine indica, and Polyscias fulva. γδ T cells proliferation was affected to the greatest extent by Polyscias fulva. These results clearly show the antioxidant capacity and anti-inflammatory activities of plant extracts collected in Cameroon. These properties of leaves and stem bark extracts may contribute to the value for these plants in traditional medicine and in general medical practice.

  18. Impact of the nutrients N and K and soluble sugars on Diabrotica speciosa (Germar) (Coleoptera, Chrysomelidae) and Agrotis ipsilon (Hufnagel) (Lepidoptera, Noctuidae) populations in potato crops, Solanum tuberosum L. (Solanaceae)

    International Nuclear Information System (INIS)

    Azeredo, Edson Henrique de; Lima, Eduardo; Cassino, Paulo Cesar Rodrigues

    2004-01-01

    Impact of the nutrients N and K and soluble sugars on Diabrotica speciosa (Germar) (Coleoptera, Chrysomelidae) and Agrotis ipsilon (Huefnagel) (Lepidoptera, Noctuidae) populations in potato crops, Solanum tuberosum L. (Solanaceae). The occurrence of Diabrotica speciosa (Germar, 1824) and Agrotis ipsilon (Huefnagel, 1767) on the potato cultivars Achat and Monalisa, influenced by nitrogen and potassium dosage, and minimum quantity of soluble sugars, was studied. The following parameters were evaluated: concentration of mineral nutrient and sugar in green leaf, senescent leaf, leaf in abscission, stem, tubercle and total plant using extracts of infusion in ethanol 80%. The largest infestation of D. speciosa larvae was on Monalisa cultivar at 150 kg.ha -1 of N + K with 27.03% at P -1 , in the absence of potassium. On the other hand, high dosage of K reduced the damages by A. ipsilon on Monalisa cultivar. However, it did not influence the storage of soluble sugar. The results indicated that in Achat cultivar the accumulated soluble sugar was reduced, probably sensitized by elevation of potassic fertilization dosing, differing from Monalisa cultivar, in which the influence was by nitrogen dosing. (author)

  19. DIVERSIDADE GENÉTICA E SELEÇÃO DE INICIADORES ISSR EM UMA POPULAÇÃO NATURAL DE MANGABA (Hancornia speciosa Gomes (APOCYNACEAE

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    DANIEL FERREIRA DA COSTA

    2015-12-01

    Full Text Available RESUMO O conhecimento da diversidade genética de espécies nativas é de grande valia quando se objetiva o melhoramento e a conservação de populações naturais. Neste sentido, o objetivodeste trabalho foi selecionar iniciadores ISSR (inter repetições de sequências simples para Hancornia speciosa (Apocynaceae, assim como quantificar a variabilidade genética em uma população natural. Foramamostrados 15 indivíduos de uma população localizada em Natal-RN. Amostras de caule foram coletadas para a posterior extração do DNA. DNA. Para a seleção, 19 primers ISSR foram testados, dos quais seis foram eficientes, apresentando locos nítidos e em maior número (UBC 808; UBC 810; UBC 826; UBC 827; UBC 841 e UBC 842, totalizando 63 locos. Desses, apenas 30 (47,62% apresentaram polimorfismo. O valor de PIC (conteúdo de informações polimórficas para os primers selecionados atingiu a média de 0,37, variando de 0,26 a 0,44. A diversidade genética foi considerada baixa dentro da população, com o número de alelos observados (na =1,48, número de alelos efetivos (ne = 1,32, índice de diversidade de Nei (He = 0,18 e índice de Shannon (I = 0,26. Os padrões de diversidade alélica encontrados indicam a ocorrência de um gargalo populacional recente. A utilização de marcadores ISSR para Hancornia speciosa mostrou-se eficaz para a quantificação da diversidade genética dos indivíduos, servindo como aporte para estratégias e planos que visem à conservação e à manutenção da espécie.

  20. Avaliação da aplicação exógena de poliaminas no crescimento de calos de mangabeira (Hancornia speciosa Gomes Evaluation of exogenous application of polyamines on callus growth of mangaba tree (Hancornia speciosa Gomes

    Directory of Open Access Journals (Sweden)

    Chrystiane Borges Fráguas

    2009-12-01

    Full Text Available Este trabalho teve como objetivo estudar o efeito das poliaminas espermidina e espermina no crescimento de calos Hancornia speciosa Gomes. Calos com 0,5 cm de diâmetro foram inoculados em meio Murashige & Skoog (1962 (MS a 50% + 100 mg L-1 de caseína hidrolisada + 200 mg L-1 de levedura de cerveja, variando os tratamentos:A: 1 mmol de espermina + 2 mg L-1 de 2,4-D (ácido 2,4 diclorofenoxiacético + 0,5 mg L-1 de NAA (ácido naftalenoacético; B: 1 mmol de espermidina + 2 mg L-1 de 2,4-D + 0,5 mg L-1 de NAA; C: 2 mg L-1 de 2,4-D + 0,5 mg L-1 de NAA. Não houve influência das poliaminas no crescimento dos calos. observou-se, nos calos tratados com espermidina, maior concentração celular de putrescina (582,37 µg g mf-1 aos 60 dias, maior teor de espermidina (502,54 µg g mf-1 e espermina (868,53 µg g mf-1 aos 40 dias de cultivo, quando se aplicou a própria poliamina. Conclui-se que a aplicação exógena de poliaminas em Hancornia speciosa não proporciona aumento no crescimento de calos. A oxidação promovida por longos períodos de cultivo in vitro induz aumento nos níveis de putrescina.The effect of polyamines spermine and spermidine in the calluses growth of Hancornia speciosa Gomes was studied. Calluses with 0.5 cm diameter were inoculated in Murashige & Skoog (1962 (MS medium 50% + hidrolizated casein 100 mg L-1 + yeast 200 mg L-1, according to the treatments: A: spermine 1 mmol + 2.4-D 2 mg L-1 + NAA 0.5 mg L-1, B: spermidine 1 mmol + 2.4-D 2 mg L-1 + NAA 0.5 mg L-1, C: 2.4-D 2 mg L-1 + NAA 0.5 mg L-1. There was not polyamine influence in the calluses growth. It was observed in the treated calluses with spermidine larger cellular putrescine concentration (582.37 µg g mf-1 at 60 days, larger spermidine concentration (502.54 µg g mf-1 and spermine (868.53 µg g mf-1 at 40 days of cultivation, when the own polyamine was applied. It was concluded that the exogenous polyamine application in Hancornia speciosa does not provide an

  1. CONTROLE QUÍMICO DO PULGÃO VERDE (Myzus persicae Sulzer, 1776 E DA VAQUINHA (Diabrotica speciosa Germ., 1824 NA CULTURA DO TOMATE RASTEIRO CHEMICAL CONTROL OF THE GREEN PEACH APHID (Myzus persicae, SULZER AND TOMATO LEAF BEETLE (Diabrotica speciosa, GERMAR IN TOMATO PLANTS

    Directory of Open Access Journals (Sweden)

    Danilo Couto

    2007-09-01

    Full Text Available

    O efeito de cinco inseticidas aplicados no tomateiro (Lycopersicum sculentum Mill, visando ao controle do pulgão verde, Myzus persicae SULZER e de vaquinha, Diabrotica speciosa GERM, foi testado em um experimento realizado na área experimental do Departamento de Horticultura da Escota de Agronomia da Universidade Federal de Goiás, no período de maio a setembro de 1994. Os tratamentos foram aplicados via pulverização e constaram de Bulldock 125 SC (dosagem de 100 ml/ 100 1 de água; Bulldock 50 CE (25 e 30 ml/100 l de água; Tamaron BR (100 ml/ 100 l de água; Orthene 750 BR (100 ml/ l00 1 de água e Folidol 600 (100 ml/l00 1 de água; e ainda uma testemunha (sem inseticida. Os resultados obtidos mostraram que todos os tratamentos foram eficientes no controle de M. persicae até sete dias após a aplicação. Aos 14 dias após a aplicação, o Bulldock 50 CE na dosagem de 25 ml/ 100 l de água e o Folidol 600 a 100 ml/ 100 l de água não apresentaram eficiência satisfatória. Com relação à D. speciosa, todos esses produtos foram igualmente eficientes até sete dias após aplicação.

    PALAVRAS-CHAVE: Myzus persicae; diabrotica speciosa; tomateiro; controle químico.

    A trial to control the green peach aphid myzus persicae and tomato leaf beetle Diabrotica speciosa was carried out in Goi

  2. Chemical Composition and Antimicrobial Potential of Palm Leaf Extracts from Babaçu (Attalea speciosa, Buriti (Mauritia flexuosa, and Macaúba (Acrocomia aculeata

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    Adriana Idalina Torcato de Oliveira

    2016-01-01

    Full Text Available Babaçu (A. speciosa, Buriti (M. flexuosa, and Macaúba (A. aculeata are palm trees typical of the ecotone area between Cerrado and the Amazon rainforest. The purpose of this study was to evaluate the antimicrobial potential of the extracts prepared from the leaves of those palms as well as determine their chemical compositions. The ethanol extracts were prepared in a Soxhlet apparatus and tested by disk diffusion and agar dilution technique against Staphylococcus aureus, Enterococcus faecalis, Escherichia coli, Pseudomonas aeruginosa, Candida albicans, and Candida parapsilosis. However, there was no significant activity at concentrations of 25, 50, and 100 mg·Ml−1. Moreover, the phytochemical analysis revealed the presence of tannins, flavonoids, catechins, steroids, triterpenes, and saponins. Gas chromatography (GC/MS analysis also identified organic acids, such as capric (decanoic acid, lauric (dodecanoic acid, myristic (tetradecanoic acid, phthalic (1,2-benzenedicarboxylic acid, palmitic (hexadecanoic acid, stearic (octadecanoic acid, linoleic (9,12-octadecadienoic acid (omega-6, linolenic (octadecatrienoic acid (omega-3, and the terpenes citronellol and phytol. Based on the chemical composition in the palm leaf extracts, the palms have the potential to be useful in the food, cosmetic, and pharmaceutical industries.

  3. Determination of Mitragynine inMitragyna speciosaRaw Materials and Finished Products by Liquid Chromatography with UV Detection: Single-Laboratory Validation.

    Science.gov (United States)

    Mudge, Elizabeth M; Brown, Paula N

    2017-01-01

    Mitragyna speciosa (kratom) is a tree indigenous to Southeast Asia, and its leaves are used in herbal formulations because they contain indole alkaloids mitragynine and 7-hydroxy (7-OH) mitragynine. An HPLC method was developed, optimized, and validated using single-laboratory validation guidelines to quantify mitragynine in kratom raw materials and finished products. The method optimization evaluated several extraction parameters including solvent type, solvent volume, time, and extraction method. The separation of the mitragynine alkaloids was achieved in 18 min with a fused-core C18 EVO column using gradient separation with ammonium bicarbonate (pH 9.5) and acetonitrile. The calibration range for mitragynine was 1.0-500 μg/mL with correlation coefficients of ≥99.9% throughout method development and validation. The method detection limit and LOQ were 0.2 and 0.6 μg/mL, respectively for mitragynine. Eight test samples were obtained to evaluate method repeatability. RSDr ranged from 0.4 to 1.0%, whereas intermediate precision ranged from 3.7 to 7.3%, with HorRat values from 0.68 to 1.96. 7-OH mitragynine was below the LOQ for all samples, therefore, spikes repeatability sample RSD values were Kratom Working Group.

  4. Photocatalytic activity against azo dye and cytotoxicity on MCF-7 cell lines of zirconium oxide nanoparticle mediated using leaves of Lagerstroemia speciosa.

    Science.gov (United States)

    Sai Saraswathi, V; Santhakumar, K

    2017-04-01

    Metal oxide nanoparticles are gaining interest in recent years. The present paper explains about the green synthesis of zirconium oxide nanoparticles (ZrO NPs) mediated from the leaves of Lagerstroemia speciosa. The prepared ZrO NPs were characterized by UV-vis spectroscopy, FT-IR, X-ray diffraction analysis (XRD), Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray spectroscopy (EDX) and Thermogravimetric Analysis (TGA). The photocatalytic activity of ZrO NPs was studied for azo dye by exposing to sunlight. The azo dye was degraded up to 94.58%. Also the ZrO NPs were studied for in vitro cytotoxicity activity against breast cancer cell lines-MCF-7 and evaluated by MTT assay. The cell morphological changes were recorded by light microscope. The cells viability was seen at 500μg/mL when compared against control. Hence the research highlights, that the method was simple, eco-friendly towards environment by phytoremediation activity of the azo dye and cytotoxicity activity against MCF-7 cell lines. Hence the present paper may help to further explore the metal nanoparticle for its potential applications. Copyright © 2017 Elsevier B.V. All rights reserved.

  5. The effect of silicon foliar application on the development of Seasonal ornamental plants. Part I: Sanvitalia speciosa 'Sunbini', Verbena 'Patio Blue' and Portulaca umbraticola 'Duna Red'

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    Regina Dębicz

    2012-12-01

    Full Text Available Silicon is known as an element stimulating plant immunity and resistance to unfavorable conditions. Additional treatment with silicon may also cause a positive change in plant performance, improving the quality of ornamental plants. In the years 2009-2010, a two-factorial experiment was conducted involving three cultivars of seasonal ornamental plant species: creeping zinnia Sanvitalia speciosa 'Sunbini', vervain Verbena 'Patio Blue', and purslane Portulaca umbraticola 'Duna Red'. The first experimental factor was the concentration of Actisil preparation being an equivalent of 60, 120, and 180 mg Si×dm-3, applied three times by spraying, the second one was the type of medium: peat substrate and peat substrate with sand. The experiment proved the beneficial effect of fertilization with silicon on plant development of Verbena and the number of shoots of all examined plant species. The higher concentrations of Actisil were applied, the higher number of shoots the plants developed. Plants treated with Actisil also produced a higher number of buds and flowers or inflorescences featuring an increased diameter. Plants cultivated in peat substrate flowered better.

  6. St. John's Wort

    Science.gov (United States)

    ... St. John’s wort is a plant with yellow flowers that has been used in traditional European medicine ... E-mail: info@nccih.nih.gov PubMed® A service of the National Library of Medicine, PubMed® contains ...

  7. Candide in St. Louis

    Science.gov (United States)

    Yee, Roger

    1974-01-01

    A young, St. Louis, Missouri, architectural firm, seeking a personal style of practice, has succeeded in creating structures that reveal client input, and which are sensitive, articulate, and at ease with complexity. Describes an elementary school, a condominium, a shopping mall, a high school, and a "community mall." Illustrated with photographs…

  8. [Paracelsus in St. Gallen].

    Science.gov (United States)

    Ochsenbein, P

    1993-12-21

    Once, coming from Nürnberg, Paracelsus interrupted his journey and remained from 1531 to 1533 in the eastern part of Switzerland: First as personal physician of the severely ill mayor of St. Gall, Christian Studer, after the death of Studer (30. 12. 1531) he probably stayed in Roggenhalm near Bühler, a small village in the Canton of Appenzell. In most of the rare testimonies from citizens of St. Gall (Bartlome Schowinger, Johannes Rütiner, Vadian) about the man from Hohenheim he is described negatively as a rather unfavorable, unpleasant outsider. Vadian himself, to whom Paracelsus dedicated the third book of his "Opus Paramirum", obviously avoided him. In St. Gall Paracelsus wrote two prognostic scripts that were promptly printed in Zurich: The "Exposition of the Comet" and the "Exposition of the Arch of Peache". Rütiner tells in his diary about a (finally successful) surgical intervention on a hand operated by Paracelsus. Another successful treatment performed on a monk in December 1533, when he lived in Roggenheim, is registered in the expense-book of the abbot of St. Gall.

  9. Química e atividades biológicas de Hancornia speciosa Gomes (Apocynaceae):: inibição da enzima conversora de angiotensina (ECA) e efeito na quimioprevenção de câncer

    OpenAIRE

    Denise Coutinho Endringer

    2007-01-01

    Hancornia speciosa Gomes (Apocynaceae) é uma espécie ocorrente no cerrado, de nome vulgar mangaba, empregada tradicionalmente no tratamento de hipertensão e doenças inflamatórias, entre outros usos. A potencial atividade anti-hipertensiva da espécie foi anteriormente demonstrada em estudos in vitro de inibição da enzima conversora de angitensina (ECA) e vasodilatação em preparações de artérias. Diversas evidências experimentais indicam que o processo inflamatório está diretamente envolvido...

  10. Impacto dos nutrientes N e K e de açúcares solúveis sobre populações de Diabrotica speciosa (Germar (Coleoptera, Chrysomelidae e Agrotis ipsilon (Hüfnagel (Lepidoptera, Noctuidae na cultura da batata, Solanum tuberosum L. (Solanaceae Impact of the nutrients N and K and soluble sugars on Diabrotica speciosa (Germar (Coleoptera, Chrysomelidae and Agrotis ipsilon (Hüfnagel (Lepidoptera, Noctuidae populations in potato crops, Solanum tuberosum L. (Solanaceae

    Directory of Open Access Journals (Sweden)

    Edson Henrique de Azeredo

    2004-03-01

    Full Text Available Foi estudada a ocorrência de Diabrotica speciosa (Germar, 1824 (Coleoptera, Chrysomelidae e de Agrotis ipsilon (Hüfnagel, 1767 (Lepidoptera, Noctuidae em plantas de batata, cultivares Achat e Monalisa, influenciadas por dosagens de nitrogênio e potássio, e teor mínimo de açúcares solúveis. Os seguintes parâmetros foram avaliados: concentração de nutrientes minerais e açúcar em folha verde, folha senescente, folha em abcisão, haste, tubérculo e planta total usando extratos de infusão em etanol 80%. A maior infestação por larvas de D. speciosa foi na cultivar Monalisa a 150 kg.ha-1 de N + K com 27,03% a PThe occurrence of Diabrotica speciosa (Germar, 1824 and Agrotis ipsilon (Hüfnagel, 1767 on the potato cultivars Achat and Monalisa, influenced by nitrogen and potassium dosage, and minimum theor of soluble sugars, was studied. The following parameters were evaluated: concentration of mineral nutrient and sugar in green leaf, senescent leaf, leaf in abscission, stem, tubercle and total plant using extracts of infusion in ethanol 80%. The largest infestation of D. speciosa larvae was on Monalisa cultivar at 150 kg.ha-1 of N + K with 27.03% at P< 0,05. It was observed that the effect of the dosage of N + K in the increment of the concentration of soluble sugars increased the damages in the tubercles and stems by A. ipsilon. The infestation by these species increased to 58.82% on the Monalisa cultivar, when the nitrogen dosage increased from zero to 150 kg.ha-1, in the absence of potassium. On the other hand, high dosage of K reduced the damages by A. ipsilon on Monalisa cultivar. However, it did not influence the storage of soluble sugar. The results indicated that in Achat cultivar the accumulated soluble sugar was reduced, probably sensibilized by elevation of potassic fertilization dosing, differing from Monalisa cultivar, in which the influence was by nitrogen dosing.

  11. Viabilidade e vigor de sementes de paineira após armazenamento, condicionamento e estresses salino e térmico Viability and vigor in folk silk tree seeds after storage, conditioning and submission to salt and thermal stress

    Directory of Open Access Journals (Sweden)

    Sonia Cristina Juliano Gualtieri de Andrade Perez

    2005-06-01

    Full Text Available O objetivo deste trabalho foi avaliar o efeito do condicionamento e dos estresses salino e térmico sobre o vigor e a viabilidade de sementes de paineira (Chorisia speciosa St.-Hil armazenadas em geladeira, em embalagens impermeáveis, durante três anos. Sementes com e sem punção do tegumento foram condicionadas em água destilada e em soluções de KNO3 a 0,1 M e 0,2 M, durante 24 horas, a 27ºC. O estresse salino foi simulado com soluções de NaCl em potenciais osmóticos variando de 0,0 a -1,2 MPa, a 27ºC. O estresse térmico de diferentes intensidades foi aplicado em sementes secas, que germinaram a 27ºC. Houve diminuição da viabilidade e do vigor das sementes com o aumento da intensidade dos estresses salino e térmico. Nas sementes condicionadas e intactas, o limite máximo de tolerância à salinidade não foi reduzido, porém houve diminuição da tolerância ao estresse térmico, em sementes condicionadas com ou sem punção. O teste de condutividade elétrica indicou as sementes condicionadas em água e KNO3 0,1 M como as de maior vigor. Sementes condicionadas em água apresentaram maior velocidade de germinação sob estresses salino e térmico. O condicionamento substituiu a punção do tegumento, que não é recomendada para sementes armazenadas.The aim of this work was to evaluate the effects of priming, salt and thermal stress on viability and vigor of folk silk tree seeds (Chorisia speciosa St.-Hil after storage in hermetic containers at 5ºC. Intact and with coat punction seeds were primed in distilled water and KNO3 solutions (0.1 M and 0.2 M during 24 hours at 27ºC. Salt stress was simulated with NaCl solutions at different osmotic potential, ranging from 0.0 MPa until -1.2 MPa, at 27ºC. Different intensities of thermal stress were applied on dried seeds; germination tests were carried out at 27ºC. As the intensity of salt and thermal stress increased, a reduction on seed vigor and viability was recorded in intact

  12. Crescimento inicial, níveis críticos de fósforo e frações fosfatadas em espécies florestais Initial growing, phosphorus critical levels and phosphate fractions in forest species

    Directory of Open Access Journals (Sweden)

    LUIZ ARNALDO FERNANDES

    2000-06-01

    Full Text Available Foi conduzido um experimento em casa de vegetação, com o objetivo de avaliar o crescimento de plântulas, os níveis críticos de P e algumas frações fosfatadas, em três espécies florestais submetidas a quatro doses de P. Mudas de aroeirinha (Schinus terenbinthifolius Raddi, paineira (Chorisia speciosa St. Hill. e jambolão (Syzygium jambolanum Lam. foram cultivadas em um Latossolo Variação Una, onde foram aplicados 0, 150, 300 e 600 mg dm-3 de P. Aos 180 dias após a germinação, as plantas foram colhidas e submetidas às análises químicas. Sob todas as doses de P, a paineira produziu maior biomassa da parte aérea e das raízes em comparação à aroeirinha e jambolão, além de apresentar maiores teores de P orgânico (Po e maior participação relativa do P orgânico (Po em relação ao P total solúvel em ácido em todos os níveis de fertilização fosfatada. O melhor crescimento da paineira foi atribuído a uma maior eficiência nos ajustes metabólicos desta espécie em relação à nutrição fosfatada, o que indica que esta espécie pode ser plantada em solos com diferentes níveis de P.An experiment under greenhouse conditions was carried out at Universidade Federal de Lavras, Minas Gerais State, Brazil, to evaluate the growth of seedlings, phosphorus critical levels and phosphate fractions, in forest species growing under four phosphorus levels. Seedlings of Schinus terenbinthifolius Raddi (aroeirinha, Chorisia speciosa St. Hill. (paineira and Syzygium jambolanum Lam. (jambolão were cultivated on an Oxisol fertilized with 0, 150, 300 and 600 mg dm-3 of P. The seedlings were harvested 180 days after germination and analysed for P forms. In all levels of phosphorus addition, the paineira produced higher aerial and root biomass than aroeirinha and jambolão, and presented higher contents of organic phosphorus and higher relative participation of organic phosphorus in the total acid soluble phosphorus under all phosphorus

  13. Allelic diversity of S-RNase at the self-incompatibility locus in natural flowering cherry populations (Prunus lannesiana var. speciosa).

    Science.gov (United States)

    Kato, S; Mukai, Y

    2004-03-01

    In the Rosaceae family, which includes Prunus, gametophytic self-incompatibility (GSI) is controlled by a single multiallelic locus (S-locus), and the S-locus product expressed in the pistils is a glycoprotein with ribonuclease activity (S-RNase). Two populations of flowering cherry (Prunus lannesiana var. speciosa), located on Hachijo Island in Japan's Izu Islands, were sampled, and S-allele diversity was surveyed based on the sequence polymorphism of S-RNase. A total of seven S-alleles were cloned and sequenced. The S-RNases of flowering cherry showed high homology to those of Prunus cultivars (P. avium and P. dulcis). In the phylogenetic tree, the S-RNases of flowering cherry and other Prunus cultivars formed a distinct group, but they did not form species-specific subgroups. The nucleotide substitution pattern in S-RNases of flowering cherry showed no excess of nonsynonymous substitutions relative to synonymous substitutions. However, the S-RNases of flowering cherry had a higher Ka/Ks ratio than those of other Prunus cultivars, and a subtle heterogeneity in the nucleotide substitution rates was observed among the Prunus species. The S-genotype of each individual was determined by Southern blotting of restriction enzyme-digested genomic DNA, using cDNA for S-RNase as a probe. A total of 22 S-alleles were identified. All individuals examined were heterozygous, as expected under GSI. The allele frequencies were, contrary to the expectation under GSI, significantly unequal. The two populations studied showed a high degree of overlap, with 18 shared alleles. However, the allele frequencies differed considerably between the two populations.

  14. Physiological functioning of Lagerstroemia speciosa L. under heavy roadside traffic: an approach to screen potential species for abatement of urban air pollution.

    Science.gov (United States)

    Singh, H; Savita; Sharma, R; Sinha, S; Kumar, M; Kumar, P; Verma, A; Sharma, S K

    2017-05-01

    The mitigation potential of avenue tree species needs a sound understanding, especially for landscape planning or planting tree species on roadside, especially in city limits where there is huge traffic due to more number of vehicles. A preliminary study was conducted to investigate the impact of heavy traffic movement and pollution thereof on physiological functioning of Lagerstroemia speciosa trees planted on roadside in terms of carbon absorption, mitigation potential and adaptive behavior. Trees on roadside exhibited reduced carbon assimilation (36.7 ± 2.4%) and transpiration rate (42.14 ± 2.9%), decreased stomatal conductance (66.85 ± 3.87%), increased stomatal resistance (212.2 ± 11.25%), more leaf thickness (40.54 ± 3.25) and water use efficiency (9.4 ± 0.87%), and changes in lead (179.31 ± 10.24%) and proline (15.61 ± 1.92%) concentration in leaf tissues when compared to less traffic area (FRI campus). The impacts were also witnessed in the form of enhanced vapour pressure deficit of air (63.18 ± 4.94%) and leaf (45.72 ± 3.25%), and air temperature (3.2 ± 0.16%) and leaf temperature (9.0 ± 0.82%) along roadside trees. It was inferred that heavy traffic movements interrupt the physiological functioning of trees due to alteration in the surrounding environment as compared to non-traffic areas. The present study provides baseline information to further explore and identify the potential avenue tree species having significant mitigation potential and adaptive efficiency to heavy traffic movements for improving urban environment.

  15. OCORRÊNCIA DE Diabrotica speciosa (COLEOPTERA: CHRYSOMELIDAE NA CULTURA DO GIRASSOL NO MUNICÍPIO DE IPANGUAÇU/RN

    Directory of Open Access Journals (Sweden)

    Danila Kelly Pereira Neri

    2010-09-01

    Full Text Available A planta do girassol destaca-se entre as oleoginosas pelo seu elevado teor de óleo nas sementes e por suas características agronômicas desejáveis, tanto que vem se ampliando seu cultivo como fonte de matéria-prima para produção de biodiesel em diversas regiões do Brasil. Seu cultivo na região Nordeste ainda é incipiente, mas há grande perspectiva de crescimento devido aos incentivos governamentais, visando à produção de biodiesel. Apesar da importância, ainda são poucos os trabalhos de pesquisas que tratam dessa cultura, e em especial de sua entomofauna. Neste contexto, o presente trabalho teve como objetivo estudar a ocorrência de besouros atacando a cultura do girassol em diferentes genótipos comerciais. O trabalho foi desenvolvido no IFRN do município de Ipanguaçu/RN. A semeadura se deu em 03/07/2008, seguindo-se todas as práticas culturais recomendadas para a cultura. O delineamento adotado foi em Blocos Casualizados com cinco tratamentos (genótipos e quatro repetições. A parcela experimental foi constituída por quatro linhas com sete metros de comprimento, espaçadas por 0,7 m entre linhas e 0,31 m entre plantas, totalizando 19,6 m2 e 90 plantas, sendo adotada como área útil para avaliação as duas fileiras centrais de plantas. As amostragens foram semanais de 14/07 a 08/09, avaliando-se visualmente 5 plantas por parcela. A espécie de besouro mais freqüentemente coletada foi Diabrotica speciosa, presente durante as três primeiras semanas da cultura.

  16. GÊNERO E ESPAÇO NA APROPRIAÇÃO FITOGEOGRÁFICA DE HANCORNIA SPECIOSA GOMES EM SERGIPE, BRASIL

    Directory of Open Access Journals (Sweden)

    Rosemeri Melo e Souza

    2011-12-01

    Full Text Available Neste artigo apresentam-se mecanismos de apropriação social da natureza na coleta de mangaba por mulheresdo Litoral Norte de Sergipe. A importância crescente desta atividade extrativista decorre do valor agregadodos frutos da Hancornia speciosa pela indústria alimentícia regional, e no acesso às terras produtoras. Essecontexto de pesquisa evidencia um jogo indiciário, conforme Ginzburg (2001, que norteia a perspectivametodológica deste trabalho e o estabelecimento das territorialidades, compreendidas enquanto relaçõesexistentes entre uma comunidade e seu patrimônio ecológico e sua herança social. Através de jornadas decampo e de abordagem etnográfica, depoimentos de catadoras de mangaba foram analisados para ademarcação das estratégias do cotidiano. Pelo fato desta atividade realizar-se em profunda dependência cíclicado estoque natural dos frutos, estabelece-se um processo de (reapropriação social da natureza feito pelascatadoras e demais agentes envolvidos na coleta dos frutos da mangabeira. Conclui-se que a territorialidadeencontra-se fortemente constrangida nos territórios analisados aponta para intrincada teia relacional e designificados que enveredam entre o ethos discursivo das mesmas, sobretudo das mais idosas catadoras comopertencimento e as condições objetivas de manutenção desse segmento vivenciadas pelas catadoras maisjovens, pressionadas entre a sobrevivência e a possibilidade, cada vez mais remota, de coexistência antecondições desfavoráveis à continuidade desta forma de exploração da mangaba como recurso de uso comum.

  17. Oliver St John Gogarty.

    Science.gov (United States)

    Clarke, R W

    1997-01-01

    Oliver St John Gogarty--Otolaryngologist to fashionable Edwardian Dublin--was a distinguished poet and a Senator in the fledgling Irish Free State after its establishment in 1922. He numbered amongst his acquaintances the poet William Butler Yeats, the novelist James Joyce and a host of political and literary persona who helped to shape modern Ireland. He was satirised as 'stately plump Buck Mulligan' in Joyce's novel Ulysses.

  18. ST Safety What's on?

    CERN Document Server

    Jacot, C

    2001-01-01

    Du premier coup de pioche jusqu'à la mise en place de la tente abritant le buffet offert lors de la cérémonie d'achèvement d'un projet, la division ST est sur les rangs et apporte son savoir faire. Ces projets nombreux et pluridisciplinaires sont étudiés, se réalisent, s'exploitent et font l'objet de maintenance jusqu'à leur démantèlement. Durant leurs cycles de vie, la division ST avance les compétences professionnelles spécifiques à chaque corps de métiers incluant le recours à de nombreux contrats avec des entreprises extérieures pour réaliser les travaux sur les sites du CERN. Pour en conserver la maîtrise, la division ST applique une gestion de projet, une assurance de la qualité et s'attache tout particulièrement à la sécurité, à la réglementation, à la prévention des risques et la gestion de ceux-ci. Sous la supervision du DSO, un ensemble de procédures et de démarches a été développé afin de faciliter les tâches du maître d'ouvrage et des entreprises contractantes, c...

  19. St. John's Wort.

    Science.gov (United States)

    Field, H L; Monti, D A; Greeson, J M; Kunkel, E J

    2000-01-01

    The objective of this article is to review the current knowledge of the pharmacology, sites of action, and therapeutic effectiveness of St. John's Wort. The method used was a review of the available literature, using keywords to search the medline database. Bibliographies of the papers, thus obtained, were searched for further documents not referenced by medline. We reviewed papers from this collection. This review reveals that most of the available data on efficacy and safety of St. John's Wort involve its use in mild to moderate depression. Much, but not all of the prevailing opinion is positive. Nevertheless, the quality of therapeutic trials vary so greatly that definitive conclusions are not possible. Both the source and mode of St. John's Wort's therapeutic effect are unclear. We need further controlled studies of effectiveness, safety, and mode of action. In addition to its use in depression, there are reports suggesting possible therapeutic effects in other conditions such as certain malignancies and infections, but these are far too preliminary to permit any conclusions.

  20. Feeding preference of Diabrotica speciosa (Ger. (Coleoptera: Chrysomelidae by broccoli leaves from natural, organic and conventional farming systems/ Preferência alimentar de Diabrotica speciosa (Ger. (Coleoptera: Chrysomelidae por folhas de brócolos cultivado em sistema natural, orgânico e convencional

    Directory of Open Access Journals (Sweden)

    Pedro Manuel O. J. Neves

    2006-06-01

    Full Text Available Multiple-choice laboratory tests were achieved to compare feeding preference of Diabrotica speciosa (Ger. to leaves of broccoli (Brassica oleraceae L. var. italica from natural, conventional and organic farming systems. Natural farming systems included incorporation of the elephant grass Pennisetum purpureum Schumacher cv. Napier (50 ton/ha, Bokashi compost (1.5 ton/ha and spray of EM 4 (Natural 1, or the incorporation of the Bokashi compost (1.5 ton /ha and spray of EM 4 (Natural 2, and in the conventional, NPK + borax were incorporated in the planting + dressing N and organic compost (1 kg/ plant was incorporated in the organic system. Organic compost was prepared using crop residues of corn (Zea mays L., soybean [Glycine max (L. Mer.], and cattle manure. Leaf discs were collected and placed in cages in multiple-choice tests. Beetles preferred mostly broccoli leaves from conventional farming system than leaves from Natural (1 and 2 and Organic farming systems. Feeding on leaves from Natural 1, Natural 2 and Organic farming system were 68, 67 and 57% of the feeding on leaves from Conventional farming system.Testes de múltipla escola foram realizados para comparar a preferência alimentar de Diabrotica speciosa (Ger. por folhas de brócolos (Brassica oleraceae L. var. italica cultivado em sistema natural, convencional e orgânico. No sistema natural de cultivo houve a incorporação de capim elefante Pennisetum purpureum Schumacher cv. Napier (50 ton/ha, composto Bokashi (1,5 ton/ha e pulverização de EM 4 (Natural 1, ou a incorporação do composto Bokashi (1,5 ton/ha e pulverização do EM 4 (Natural 2, no sistema convencional houve a incorporação do NPK + borax + N em cobertura, e no sistema orgânico incorporouse composto orgânico (1 kg/planta. O composto orgânico foi preparado utilizando-se resíduos de milho (Zea mays L. e soja [Glycine max (L. Mer.] e esterco de gado. Folhas foram retiradas das plantas das quais foram separados

  1. Mount St. Helens Rebirth

    Science.gov (United States)

    2002-01-01

    The catastrophic eruption of Mt. St. Helens 20 years ago today (on May 18, 1980), ranks among the most important natural events of the twentieth century in the United States. Because Mt. St. Helens is in a remote area of the Cascades Mountains, only a few people were killed by the eruption, but property damage and destruction totaled in the billions of dollars. Mount St. Helens is an example of a composite or stratovolcano. These are explosive volcanoes that are generally steep-sided, symmetrical cones built up by the accumulation of debris from previous eruptions and consist of alternating layers of lava flows, volcanic ash and cinder. Some of the most photographed mountains in the world are stratovolcanoes, including Mount Fuji in Japan, Mount Cotopaxi in Ecuador, Mount Hood in Oregon, and Mount Rainier in Washington. The recently erupting Mount Usu on the island of Hokkaido in Japan is also a stratovolcano. Stratovolcanoes are characterized by having plumbing systems that move magma from a chamber deep within the Earth's crust to vents at the surface. The height of Mt. St. Helens was reduced from about 2950 m (9677 ft) to about 2550 m (8364 ft) as a result of the explosive eruption on the morning of May 18. The eruption sent a column of dust and ash upwards more than 25 km into the atmosphere, and shock waves from the blast knocked down almost every tree within 10 km of the central crater. Massive avalanches and mudflows, generated by the near-instantaneous melting of deep snowpacks on the flanks of the mountain, devastated an area more than 20 km to the north and east of the former summit, and rivers choked with all sorts of debris were flooded more than 100 km away. The area of almost total destruction was about 600 sq. km. Ash from the eruption cloud was rapidly blown to the northeast and east producing lightning which started many small forest fires. An erie darkness caused by the cloud enveloped the landscape more than 200 km from the blast area, and ash

  2. Communication from ST Group

    CERN Document Server

    TS Department

    2008-01-01

    In order to prepare the organization of the Open Days, please note that FM Group will not able to take into account either specific requests for waste collection from 2nd to 6th of April, either removal or PC transport requests between the 31st and the 11th of March. We kindly ask you to plan the collection of any type of waste and the urgent transport of office furniture or PC before the 31st of March. Waste collection requests shall be formulated contacting FM Support at 77777 or at the email address mailto:Fm.Support@cern.ch; removal of office furniture or PC transport requests must be made using the EDH ‘Transport request’ form selecting the "Removals" or the "PC transport" category from the drop-down menu. For any question concerning the waste sorting, please consult the following web address: http://dechets-waste.web.cern.ch/dechets-waste/. Thank you for your understanding and collaboration. TS/FM Group

  3. Mount St. Helens Flyover

    Science.gov (United States)

    2002-01-01

    This Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) image of Mt. St. Helens volcano in Washington State was acquired on August 8, 2000 and covers an area of 37 by 51 km. Mount Saint Helens, a volcano in the Cascade Range of southwestern Washington that had been dormant since 1857, began to show signs of renewed activity in early 1980. On 18 May 1980, it erupted with such violence that the top of the mountain was blown off, spewing a cloud of ash and gases that rose to an altitude of 19 kilometers. The blast killed about 60 people and destroyed all life in an area of some 180 square kilometers (some 70 square miles), while a much larger area was covered with ash and debris. It continues to spit forth ash and steam intermittently. As a result of the eruption, the mountain's elevation decreased from 2,950 meters to 2,549 meters. The simulated fly-over was produced by draping ASTER visible and near infrared image data over a digital topography model, created from ASTER's 3-D stereo bands. The color was computer enhanced to create a 'natural' color image, where the vegetation appears green. The topography has been exaggerated 2 times to enhance the appearance of the relief. Landsat7 aquired an image of Mt. St. Helens on August 22, 1999. Image and animation courtesy NASA/GSFC/MITI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team.

  4. Tombamento de mudas de espécies florestais causado por Sclerotium rolfsii Sacc Damping-off of forest species caused by Sclerotium rolfsii Sacc

    Directory of Open Access Journals (Sweden)

    Reginaldo Gonçalves Mafia

    2007-08-01

    Full Text Available O estudo objetivou avaliar a gama de hospedeiros de Sclerotium rolfsii por inoculação controlada das seguintes espécies florestais nativas e exóticas: Anadenanthera peregrina (angico-vermelho, Chorisia speciosa (paineira-rosa, Clitoria fairchildiana (sombreiro, Copaifera langsdorffii (copaíba, Delonix regia (flamboyant-vermelho, Enterolobium contortisiliquum (orelha-de-negro, Leucaena leucocephala (leucena, Mabea fistulifera (canudo-de-pito, Platymiscium pubescens (tamboril-da-mata, Senna macranthera (fedegoso, Spathodea campanulata (espatódea e Tabebuia avellanedae (ipê-roxo, bem como comprovar o tombamento de mudas em pré e pós-emergência. Todas as espécies foram suscetíveis ao tombamento de mudas causado por S. rolfsii, em pré e em pós-emergência.The host range of Sclerotium rolfsii was evaluated by controlled inoculation of the following native and exotic forest species: Anadenanthera peregrina (angico vermelho, Chorisia speciosa (paineira rosa, Clitoria fairchildiana (sombreiro, Copaifera langsdorffii (copaíba, Delonix regia (flamboyant vermelho, Enterolobium contortisiliquum (orelha de negro, Leucaena leucocephala (leucena, Mabea fistulifera (canudo-de-pito, Platymiscium pubescens (tamboril da mata, Senna macranthera (fedegoso, Spathodea campanulata (espatódea e Tabebuia avellanedae (ipê roxo. The fungus caused damping-off in pre and post emergence in all tested species.

  5. Efeito de diferentes meios de cultura na germinação in vitro de sementes de mangabeira (Hancornia speciosa Gomes

    Directory of Open Access Journals (Sweden)

    Kívia Soares de Oliveira

    2014-08-01

    Full Text Available A mangabeira, pertencente à família Apocynaceae, é uma espécie nativa do Cerrado e dos tabuleiros costeiros, sendo bastante conhecida pela importância social, econômica e cultural. O objetivo deste trabalho foi avaliar o efeito de diferentes meios de cultura na germinação in vitro de sementes de mangabeira, visando contribuir cientificamente para o conhecimento da espécie. Os tratamentos utilizados foram: T1 - vermiculita (+40 mL de água; T2 - vermiculita + areia (1:1 + 40 mL de água; T3 - vermiculita + areia barrada (1:1 + 40 mL de água; T4 - vermiculita + MS básico (40 ml; T5 - vermiculita + ½ MS (40 ml; T6 - areia (+40 mL de água; T7 - areia barrada (+40 mL de água; e T8 - areia + areia barrada (1:1 + 40 mL de água. Para tanto, realizou-se um experimento com oito tratamentos, incluindo oito repetições com 80 sementes por tratamento. Foram analisadas as seguintes variáveis: porcentagem de germinação, tempo médio de germinação e índice de velocidade de germinação. O delineamento experimental foi inteiramente casualizado e as médias, comparadas pelo teste de Tukey a 5% de significância. Observaram-se diferenças significativas para a porcentagem de germinação, sendo T3 estatisticamente superior, e para o IVG, com o melhor resultado, os tratamentos T1, T2 e T3. Entretanto, os valores de tempo médio de germinação não apresentaram diferença significativa. Diante dos resultados, pôde-se concluir que os tratamentos dotados de vermiculita e combinações, T1, T2 e T3, exercem influência positiva na emergência de Hancornia speciosa Gomes.

  6. StUbEx

    DEFF Research Database (Denmark)

    Akimov, Vyacheslav; Henningsen, Jeanette; Hallenborg, Philip

    2014-01-01

    Post-translational modification of proteins with the small polypeptide ubiquitin plays a pivotal role in many cellular processes, altering protein lifespan, location, and function and regulating protein-protein interactions. Ubiquitination exerts its diverse functions through complex mechanisms...... by formation of different polymeric chains and subsequent recognition of the ubiquitin signal by specific protein interaction domains. Despite some recent advances in the analytical tools for the analysis of ubiquitination by mass spectrometry, there is still a need for additional strategies suitable...... for investigation of cellular ubiquitination at the proteome level. Here, we present a stable tagged ubiquitin exchange (StUbEx) cellular system in which endogenous ubiquitin is replaced with an epitope-tagged version, thereby allowing specific and efficient affinity purification of ubiquitinated proteins...

  7. Mt. St. Helens

    Science.gov (United States)

    2001-01-01

    [figure removed for brevity, see original site] [figure removed for brevity, see original site] Figure 1 Movie This 3-D anaglyph image of Mt. St. Helens volcano combines the nadir-looking and back-looking band 3 images of ASTER. To view the image in stereo, you will need blue-red glasses. Make sure to look through the red lens with your left eye. Figure 1: This ASTER image of Mt. St. Helens volcano in Washington was acquired on August 8, 2000 and covers an area of 37 by 51 km. Mount Saint Helens, a volcano in the Cascade Range of southwestern Washington that had been dormant since 1857, began to show signs of renewed activity in early 1980. On 18 May 1980, it erupted with such violence that the top of the mountain was blown off, spewing a cloud of ash and gases that rose to an altitude of 19 kilometers. The blast killed about 60 people and destroyed all life in an area of some 180 square kilometers (some 70 square miles), while a much larger area was covered with ash and debris. It continues to spit forth ash and steam intermittently. As a result of the eruption, the mountain's elevation decreased from 2,950 meters to 2,549 meters. The image is centered at 46.2 degrees north latitude, 122.2 degrees west longitude. Movie: The simulated fly-over was produced by draping ASTER visible and near infrared image data over a digital topography model, created from ASTER's 3-D stereo bands. The color was computer enhanced to create a natural color image, where the vegetation appears green. The topography has been exaggerated 2 times to enhance the appearance of the relief. The U.S. science team is located at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The Terra mission is part of NASA's Science Mission Directorate.

  8. Efeito da irrigação e da ontogenia sobre a estimativa da área foliar de Hancornia speciosa Gómez (mangabeira Effect of irrigation and ontogeny in estimating the leaf area of Hancornia speciosa Gómez (mangabeira

    Directory of Open Access Journals (Sweden)

    Francisco de Almeida Lobo

    2010-09-01

    Full Text Available A estimativa da área foliar por meio de curvas de regressão que empregam o produto do comprimento pela largura do limbo como variável independente, é uma prática comumente empregada na análise de crescimento vegetal. Entretanto, dependendo da natureza do material vegetal e das condições de cultivo, é possível a ocorrência de variações que afetam essa relação alométrica, o que implica a não universalidade de uma única curva de regressão. Devido a esse problema, o presente trabalho teve como objetivo realizar uma avaliação do efeito da irrigação e da ontogenia sobre a estimativa da área foliar da Hancornia speciosa, para testar a hipótese de que a irrigação afetaria tal relação alométrica. Verificou-se que os modelos de regressão obtidos para as plantas irrigadas e para as não irrigadas diferiram entre si, sendo que houve a necessidade da inclusão da área foliar específica no modelo de estimativa da área foliar das plantas não irrigadas. A não inclusão dessa variável no modelo de regressão acarretou uma diferença de estimativa que se incrementou com a redução da área foliar específica. Em folhas recém-expandidas de plantas irrigadas e não irrigadas, verificou-se diferença na área foliar específica devida à alteração na massa seca e não associada à largura dos tecidos foliares.Leaf area estimation by regression curves using the product of the length by the breadth of the leaf blade as an independent variable is commonly used in plant growth analysis. However, depending on the nature of the plant species and the farming conditions,it is possible to find variations which affect this allometric relationship, leading to non-universality of a single regression curve. Due to this problem, the present work aimed to evaluate the effect of irrigation and ontogeny in estimating the leaf area of Hancornia speciosa to test the hypothesis that the irrigation would affect such allometric relationship. It

  9. Sterilization of males Diabrotica speciosa (Coleoptera: Chrysomelidae) with gamma irradiation for control in cultures of economic importance; Esterilização de machos de Diabrotica speciosa (Coleoptera: Chrysomelidae) com irradiação gama visando o controle em culturas de importância econômica

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, Marcio Martins

    2017-07-01

    Diabrotica speciosa (Germar, 1824), causes direct and indirect damage on crops by feeding and acting as virus vector for diverse groups of plants. The main control form is the use of agrochemicals so, aiming to manage the population without environment impact, the present work had as objective to determine the dose of gamma radiation that provides male sterility, its foliar consumption and gonads histological changes. Adult males were submitted to gamma radiation ({sup 60}Co) on the third day after emergence at doses of 0, 25, 50, 75 and 100 Gy at 0,808 KGy/ hour rate, totaling 20 replicates/ dose. The sterilizing dose was based on the fertility of sexually mature non-irradiated females mated by irradiated males. The couples were individualized in 'arenas' and fed with leaflets Phaseolus vulgaris L. with black gauze moistened for oviposition. Eggs were treated and arranged in plastic containers lined with filter paper. After hatching, larvae were transferred to a larger container with a cover cap containing fine vermiculite and maize seedlings (Zea mays L.), which were replaced every 10 days, until adult emergence. After the 4{sup th} day of irradiation, a leaf disc with 3.2 cm in diameter was available for 24 hours for each couple. The discs were scanned and analyzed in ImageJ software. To evaluate the gonads, 3 males with 8 days of age were used per dose. They were dissected in PBS, through the Hematoxylin-Eosin technique the laminas were evaluated under an optical microscope. We observed that male sterility occurred from 75 Gy and the average longevity of this group was of 12.5 days. Consumption of the leaf area by couples composed by a sterile male was 42.9% and the testicular histological analysis demonstrated tissue disorganisation and gaps between germ cells at the highest doses of 75 Gy and 100 Gy. (author)

  10. Divisions-ST Formation

    CERN Document Server

    Henny, L

    2001-01-01

    Au CERN la formation est une partie intégrante des activités de l'Organisation. Mentionnée dans le Statut du Personnel depuis l'origine, elle figure au Règlement depuis 1981 et est largement explicitée dans la Circulaire Administrative N° 16. L'organe réglementaire est constitué par la Commission Paritaire de Formation (Joint Training Board dont le sigle est JTB) qui a pour but de conseiller le Directeur Général en matière de formation, de définir la politique de formation et d'en faire l'évaluation. Des organes spécifiques ont été mis en place pour organiser les différents programmes : le Groupe Formation et Développement, le Comité exécutif de formation (sigle TEC), le Comité d'enseignement académique. Des délégués divisionnaires à la formation (sigle DTO) servent de courroie de transmission entre ces organes, le personnel et le Service de l'Enseignement (Div. HR). La Division ST dont les activités présentent une grande variété se doit de poursuivre une politique de formation s...

  11. Teknisk Ståbi

    DEFF Research Database (Denmark)

    Teknisk Ståbi er de bygningsprojekterendes og entreprenørers håndbog. Den dækker matematik, fysik, statestik, laster og sikkerhed samt beggematerialerne: beton, stål, træ, murværk, letbeton, glas og endelig fundering. Denne udgave er en næsten totalrevision, baseret på de nye Eurocodes, der afløs...

  12. Ecological aspects of Rhodnius nasutus Stål, 1859 (Hemiptera: Reduviidae: Triatominae in palms of the Chapada do Araripe in Ceará, Brazil

    Directory of Open Access Journals (Sweden)

    Fernando Braga Stehling Dias

    2008-12-01

    Full Text Available The aim of this work is to present aspects related to the ecology of Rhodnius nasutus Stål, 1859 in palms from Chapada do Araripe in Ceará, Brazil. The following five species of palms were investigated: babaçu (Attalea speciosa, buriti (Mauritia flexuosa, carnaúba (Copernicia prunifera, catolé (Syagrus oleracea and macaúba-barriguda (Acrocomia intumescens. Fifth palms were dissected (10 specimens for each species. The overall infestation index was 86%, with a total of 521 triatomines collected. The Trypanosoma cruzi Chagas, 1909 Index was 16.8% and two insects presented mixed infection with Trypanosoma rangeli Tejera, 1920. A precipitin test showed that R. nasutus from palms of Chapada do Araripe are associated with opossum and bird although other possible bloodmeals were observed. Our results showing a high index of infestation of the palms as well as T. cruzi infection, the association of R. nasutus with the most diverse species of palms and proximity of these palms to houses demonstrate the importance of this area for sylvatic T. cruzi transmission and suggest the need for epidemiological surveillance in the region of the Chapada do Araripe.

  13. Ecological aspects of Rhodnius nasutus Stål, 1859 (Hemiptera: Reduviidae: Triatominae) in palms of the Chapada do Araripe in Ceará, Brazil.

    Science.gov (United States)

    Dias, Fernando Braga Stehling; Bezerra, Cláudia Mendonça; Machado, Evandro Marques de Menezes; Casanova, Cláudio; Diotaiuti, Liléia

    2008-12-01

    The aim of this work is to present aspects related to the ecology of Rhodnius nasutus Stål, 1859 in palms from Chapada do Araripe in Ceará, Brazil. The following five species of palms were investigated: babaçu (Attalea speciosa), buriti (Mauritia flexuosa), carnaúba (Copernicia prunifera), catolé (Syagrus oleracea) and macaúba-barriguda (Acrocomia intumescens). Fifth palms were dissected (10 specimens for each species). The overall infestation index was 86%, with a total of 521 triatomines collected. The Trypanosoma cruzi Chagas, 1909 Index was 16.8% and two insects presented mixed infection with Trypanosoma rangeli Tejera, 1920. A precipitin test showed that R. nasutus from palms of Chapada do Araripe are associated with opossum and bird although other possible bloodmeals were observed. Our results showing a high index of infestation of the palms as well as T. cruzi infection, the association of R. nasutus with the most diverse species of palms and proximity of these palms to houses demonstrate the importance of this area for sylvatic T. cruzi transmission and suggest the need for epidemiological surveillance in the region of the Chapada do Araripe.

  14. The Danish St. Croix Project

    DEFF Research Database (Denmark)

    J. Douma, Michael; Rasmussen, Anders Bo

    2014-01-01

    Working from previously unknown sources in Danish archives, this article establishes for the first time the important role that the island of St. Croix played in the Lincoln Administration’s considerations on colonizing African Americans abroad. The paper argues that U.S. Secretary of State Willi...... H. Seward, commonly viewed as an anti-colonizationist, was at least a mild proponent of colonization in its earliest stages. The paper demonstrates further that in the summer of 1862 the St. Croix colonization project was an important stepping stone in the Lincoln administration’s legal...

  15. 1st quarterly report 1977

    International Nuclear Information System (INIS)

    1977-06-01

    The present report describes the activities carried out in the 1st quarter of 1977 at the Gesellschaft fuer Kernforschung in Karlsruhe or on its behalf in the framework of the fast breeder project (PSB). The problems and main results of the partial projects fuel rod development, materials testing, reactor physics, reactor safety and reactor technology are presented. (RW) [de

  16. Methylphenidatinduceret ST-elevations-myokardieinfarkt

    DEFF Research Database (Denmark)

    Ruwald, Martin Huth; Ruwald, Anne-Christine Huth; Tønder, Niels

    2012-01-01

    Adult attention deficit and hyperkinetic disorder (ADHD) is increasingly diagnosed and treated with methylphenidate. We present the case of an 20 year-old man, who was diagnosed with ADHD and suffered a ST elevation acute myocardial infarction due to coronary vasospasm related to an overdose...

  17. Following “the Roots” of Kratom (Mitragyna speciosa): The Evolution of an Enhancer from a Traditional Use to Increase Work and Productivity in Southeast Asia to a Recreational Psychoactive Drug in Western Countries

    Science.gov (United States)

    Cinosi, Eduardo; Martinotti, Giovanni; Simonato, Pierluigi; Singh, Darshan; Demetrovics, Zsolt; Roman-Urrestarazu, Andres; Bersani, Francesco Saverio; Vicknasingam, Balasingam; Piazzon, Giulia; Li, Jih-Heng; Yu, Wen-Jing; Kapitány-Fövény, Máté; Farkas, Judit; Di Giannantonio, Massimo; Corazza, Ornella

    2015-01-01

    The use of substances to enhance human abilities is a constant and cross-cultural feature in the evolution of humanity. Although much has changed over time, the availability on the Internet, often supported by misleading marketing strategies, has made their use even more likely and risky. This paper will explore the case of Mitragyna speciosa Korth. (kratom), a tropical tree used traditionally to combat fatigue and improve work productivity among farm populations in Southeast Asia, which has recently become popular as novel psychoactive substance in Western countries. Specifically, it (i) reviews the state of the art on kratom pharmacology and identification; (ii) provides a comprehensive overview of kratom use cross-culturally; (iii) explores the subjective experiences of users; (iv) identifies potential risks and side-effects related to its consumption. Finally, it concludes that the use of kratom is not negligible, especially for self-medication, and more clinical, pharmacological, and socioanthropological studies as well as a better international collaboration are needed to tackle this marginally explored phenomenon. PMID:26640804

  18. Following "the Roots" of Kratom (Mitragyna speciosa): The Evolution of an Enhancer from a Traditional Use to Increase Work and Productivity in Southeast Asia to a Recreational Psychoactive Drug in Western Countries.

    Science.gov (United States)

    Cinosi, Eduardo; Martinotti, Giovanni; Simonato, Pierluigi; Singh, Darshan; Demetrovics, Zsolt; Roman-Urrestarazu, Andres; Bersani, Francesco Saverio; Vicknasingam, Balasingam; Piazzon, Giulia; Li, Jih-Heng; Yu, Wen-Jing; Kapitány-Fövény, Máté; Farkas, Judit; Di Giannantonio, Massimo; Corazza, Ornella

    2015-01-01

    The use of substances to enhance human abilities is a constant and cross-cultural feature in the evolution of humanity. Although much has changed over time, the availability on the Internet, often supported by misleading marketing strategies, has made their use even more likely and risky. This paper will explore the case of Mitragyna speciosa Korth. (kratom), a tropical tree used traditionally to combat fatigue and improve work productivity among farm populations in Southeast Asia, which has recently become popular as novel psychoactive substance in Western countries. Specifically, it (i) reviews the state of the art on kratom pharmacology and identification; (ii) provides a comprehensive overview of kratom use cross-culturally; (iii) explores the subjective experiences of users; (iv) identifies potential risks and side-effects related to its consumption. Finally, it concludes that the use of kratom is not negligible, especially for self-medication, and more clinical, pharmacological, and socioanthropological studies as well as a better international collaboration are needed to tackle this marginally explored phenomenon.

  19. Following “the Roots” of Kratom (Mitragyna speciosa: The Evolution of an Enhancer from a Traditional Use to Increase Work and Productivity in Southeast Asia to a Recreational Psychoactive Drug in Western Countries

    Directory of Open Access Journals (Sweden)

    Eduardo Cinosi

    2015-01-01

    Full Text Available The use of substances to enhance human abilities is a constant and cross-cultural feature in the evolution of humanity. Although much has changed over time, the availability on the Internet, often supported by misleading marketing strategies, has made their use even more likely and risky. This paper will explore the case of Mitragyna speciosa Korth. (kratom, a tropical tree used traditionally to combat fatigue and improve work productivity among farm populations in Southeast Asia, which has recently become popular as novel psychoactive substance in Western countries. Specifically, it (i reviews the state of the art on kratom pharmacology and identification; (ii provides a comprehensive overview of kratom use cross-culturally; (iii explores the subjective experiences of users; (iv identifies potential risks and side-effects related to its consumption. Finally, it concludes that the use of kratom is not negligible, especially for self-medication, and more clinical, pharmacological, and socioanthropological studies as well as a better international collaboration are needed to tackle this marginally explored phenomenon.

  20. Team Danmarks støttekoncept

    DEFF Research Database (Denmark)

    Storm, Rasmus K.

    Evaluering af Team Danmarks støttekoncept 2005-2008 med omfattende analyser af Team Danmarks virke, dets støttekoncept og de samarbejdsrelationer med specialforbund, udøvere, politisk valgte ledere, trænere mv., som udmøntningen af støttekonceptet forudsætter. Herunder analyse af...

  1. Amsterdam - St. Paul Hotspot History

    OpenAIRE

    Janin, Myriam; Hémond, Christophe,; Maia, Marcia

    2010-01-01

    The Amsterdam St. Paul hotspot (Indian Ocean) interacts with a regional depleted mantle containing some DUPAL-like blobs. Its lateral motion velocity is about 1-2 cm/yr. The plume induced the construction of a volcanic chain and of an oceanic plateau through two pulses of more intense magmatic activity. The intraplate plate activity appears partially controlled by some tectonic stress induced by the diverging motion of the Australian and Capricorn plates along a diffuse boundary.

  2. Special report: Mt. St. Helens

    Science.gov (United States)

    Mt. St Helens Volcano, Cascade Range, Southern Washington, USA (46.20°N, 122.18°W.) All times are local (GMT - 7 h through October 24, GMT - 8 h thereafter. Lava extrusion that probably began October 30 added a new lobe to the composite dome in the crater of Mt. St. Helens. After lava extrusion ended September 10 (see September 22 Eos), rates of deformation in the crater remained low for several weeks, as they had after earlier extrusion episodes. Sulfur dioxide emission ranged from 70 to 190 tons per day between October 9 and 24, but showed no particular trends. Inflation of the dome has caused small thrust faults to form in the surrounding crater floor. In early October the most active thrust, south of the dome, was moving at about 1.5 cm/d, and stations on the north crater rampart showed outward movement of about 0.5 cm/d. By October 24 these rates had increased to 14.5 and 3.5-4 cm/d, respectively, and leveling profiles perpendicular to the dome showed that crater floor tilt rates had reached 400-500 μrad/d, prompting the U.S. Geological Survey (USGS) to issue an advisory prediction of renewed lava extrusion within the next two weeks.

  3. Some fossil Clypeastrids (Echinoidea) from Brimstone Hill (St. Kitts) and Sugar Loaf (St. Eustatius), Lesser Antilles

    NARCIS (Netherlands)

    Engel, H.

    1961-01-01

    In March 1958 Dr. J. H. WESTERMANN and Mr. H. KIEL collected some fossil Echinids on the islands of St. Kitts and St. Eustatius. The fossils of St. Kitts were found in a yellow limestone (sample nr. 42), situated on the west flank of Brimstone Hill, belonging to a series of peculiar-looking upturned

  4. 21st Century Security Manager

    Directory of Open Access Journals (Sweden)

    Stelian ARION

    2010-11-01

    Full Text Available We live in world of uncertainty that generates major paradigms changing that affect security risk management. Modern organization’s security risks management can’t be done without a profound knowlegde and daily practice for security governance, security risk management and resilience. 21st Century security manager need to deal with several areas of konwledge in order to succesfully manage security risks. The document presents the advantages, disadvantages and challenges for security managers thah have government backgroud, or IT security backgroud, or are promoted from organization’s inside leaders. There are six different areas of knowledge that successful security programs of the future must incorporate, either in the knowledge base of their leaders or in the collective knowledge of the leading staff. They are government elements, security organization, emerging issue awareness, IT security, business elements and executive leadership.

  5. Countering 21st Century Threats

    DEFF Research Database (Denmark)

    Scharling Pedersen, Peter; Pillai, Chad M.; Hun, Lee Jae

    2015-01-01

    The United States and its Allies confront an increasingly volatile world where threats range from traditional state-on-state challenges to non-state transnational networks. To successfully combat these 21st Century problems, in an era of resource and geo-political power constraints, the U...... to be addressed in order to successfully conduct IW. As result of researching the issues associated with developing a JIIM approach to IW, the paper makes the following recommendations: • Establishing universally accepted concepts and doctrines for IW, UW, Foreign Internal Defense (FID), Counter Insurgency (COIN......), Counter-Terrorism (CT), and Security and Stability Operations (SSO). • Establishing a construct that allows a strategic Whole-of-Government capacity for operations coordinated by joint interagency task forces. • Continue to developing the Global SOF network. • Increased intelligence sharing in areas...

  6. 21st International Meshing Roundtable

    CERN Document Server

    Weill, Jean-Christophe

    2013-01-01

    This volume contains the articles presented at the 21st International Meshing Roundtable (IMR) organized, in part, by Sandia National Laboratories and was held on October 7–10, 2012 in San Jose, CA, USA. The first IMR was held in 1992, and the conference series has been held annually since. Each year the IMR brings together researchers, developers, and application experts in a variety of disciplines, from all over the world, to present and discuss ideas on mesh generation and related topics. The technical papers in this volume present theoretical and novel ideas and algorithms with practical potential, as well as technical applications in science and engineering, geometric modeling, computer graphics, and visualization.

  7. Firmaets Største Bedrift

    DEFF Research Database (Denmark)

    Hansen, Peer Henrik

    fortæller, hvordan de tidligere modstandsfolk Arne Sejr og Niels Frommelt få år efter befrielsen etablerede deres såkaldte Firma for med støtte fra ledende danske politikere, Forsvarets Efterretningstjeneste og CIA at organisere en hemmelig krig mod Sovjetunionens danske støtter. Meget tyder på, at både...

  8. 78 FR 7663 - SLR; 2013 International Rolex Regatta; St. Thomas Harbor; St. Thomas, U.S. Virgin Islands

    Science.gov (United States)

    2013-02-04

    ... 1625-AA08 SLR; 2013 International Rolex Regatta; St. Thomas Harbor; St. Thomas, U.S. Virgin Islands... special local regulations on the waters of St. Thomas Harbor in St. Thomas, U. S. Virgin Islands during... through March 24, 2013, the St. Thomas Yacht Club is sponsoring the 2013 Rolex Regatta, a series of sail...

  9. 78 FR 22778 - Safety Zone; Corp. Event Finale UHC, St. Thomas Harbor; St. Thomas, U.S.V.I.

    Science.gov (United States)

    2013-04-17

    ...-AA00 Safety Zone; Corp. Event Finale UHC, St. Thomas Harbor; St. Thomas, U.S.V.I. AGENCY: Coast Guard... waters of St. Thomas Harbor in St. Thomas, U.S. Virgin Islands during the Corp. Event Finale UHC, a... barge being positioned near the St. Thomas Harbor channel from which fireworks will be lit. The safety...

  10. 78 FR 23489 - Safety Zone; V.I. Carnival Finale, St. Thomas Harbor; St. Thomas, U.S.V.I.

    Science.gov (United States)

    2013-04-19

    ...-AA00 Safety Zone; V.I. Carnival Finale, St. Thomas Harbor; St. Thomas, U.S.V.I. AGENCY: Coast Guard... waters of St. Thomas Harbor in St. Thomas, U.S. Virgin Islands during the V.I. Carnival Finale, a... being positioned near the St. Thomas Harbor channel from which fireworks will be lit. The safety zone is...

  11. 78 FR 16208 - Safety Zone; V. I. Carnival Finale; St. Thomas Harbor; St. Thomas, U.S. Virgin Islands

    Science.gov (United States)

    2013-03-14

    ... 1625-AA00 Safety Zone; V. I. Carnival Finale; St. Thomas Harbor; St. Thomas, U.S. Virgin Islands AGENCY... establish a safety zone on the waters of St. Thomas Harbor in St. Thomas, U. S. Virgin Islands during the V..., 2013, and will entail a barge being positioned near the St. Thomas Harbor channel from which fireworks...

  12. 78 FR 16211 - Safety Zone, Corp. Event Finale UHC, St. Thomas Harbor; St. Thomas, U.S. Virgin Islands

    Science.gov (United States)

    2013-03-14

    ... 1625-AA00 Safety Zone, Corp. Event Finale UHC, St. Thomas Harbor; St. Thomas, U.S. Virgin Islands... establish a temporary safety zone on the waters of St. Thomas Harbor in St. Thomas, U.S. Virgin Islands... near the St. Thomas Harbor channel from which fireworks will be lit. DATES: Comments and related...

  13. Galleria mellonella infection model demonstrates high lethality of ST69 and ST127 uropathogenic E. coli.

    Directory of Open Access Journals (Sweden)

    Majed F Alghoribi

    Full Text Available Galleria mellonella larvae are an alternative in vivo model for investigating bacterial pathogenicity. Here, we examined the pathogenicity of 71 isolates from five leading uropathogenic E. coli (UPEC lineages using G. mellonella larvae. Larvae were challenged with a range of inoculum doses to determine the 50% lethal dose (LD50 and for analysis of survival outcome using Kaplan-Meier plots. Virulence was correlated with carriage of a panel of 29 virulence factors (VF. Larvae inoculated with ST69 and ST127 isolates (10(4 colony-forming units/larvae showed significantly higher mortality rates than those infected with ST73, ST95 and ST131 isolates, killing 50% of the larvae within 24 hours. Interestingly, ST131 isolates were the least virulent. We observed that ST127 isolates are significantly associated with a higher VF-score than isolates of all other STs tested (P≤0.0001, including ST69 (P<0.02, but one ST127 isolate (strain EC18 was avirulent. Comparative genomic analyses with virulent ST127 strains revealed an IS1 mediated deletion in the O-antigen cluster in strain EC18, which is likely to explain the lack of virulence in the larvae infection model. Virulence in the larvae was not correlated with serotype or phylogenetic group. This study illustrates that G. mellonella are an excellent tool for investigation of the virulence of UPEC strains. The findings also support our suggestion that the incidence of ST127 strains should be monitored, as these isolates have not yet been widely reported, but they clearly have a pathogenic potential greater than that of more widely recognised clones, including ST73, ST95 or ST131.

  14. ST peak during percutaneous coronary intervention serves as an early prognostic predictor in patients with ST-segment elevation myocardial

    DEFF Research Database (Denmark)

    Lønborg, Jacob; Kelbæk, Henning; Engstrøm, Thomas

    2014-01-01

    AIMS: To evaluate the clinical importance of the ST peak phenomenon during primary percutaneous coronary intervention (PCI) in patients with ST-segment elevation myocardial infarction (STEMI). METHODS AND RESULTS: Continuous ST monitoring was performed in 942 STEMI patients from arrival until 90...... minutes after revascularisation. ST peak was defined as ≥1 mm increase in the ST-segment during PCI compared with the ST elevation before intervention. ST peak was observed in 26.9% of patients. During median follow-up of 4.1 years, 20.7% of patients experienced a major adverse cardiac event (MACE). ST...

  15. Urbanization in 21st century.

    Science.gov (United States)

    Altarejos, R G

    1990-01-01

    Due to a combination of rapid population growth and high levels of rural-urban migration, overcrowding will be common in many cities around the world in the 21st century. Currently at 5.3 billion, the global population is expected to increase to 6 billion by the year 2000, and to 9 billion by 2025. Experts predict that urban centers will bear the brunt of the population growth. Rural areas have seen declines in the standard of living, partly due to natural disasters, civil war, and economic policies favoring urban centers. In search of jobs, better access to education, and health services, rural populations will flock to cities. But the rapid growth of cities will inevitably lead to the creation of slums, which will hamper urban development. Urban demographers predict that by the end of the century, 1/2 of the world's population will be urban, and 1/5 of these people will be concentrated in "mega cities," populations of 4 million or more. International migration will play a significant role, as people cross borders in search of opportunity. But contrary to the traditional model of urban growth, much of it will take place in developing countries. According to a 1985 study, developed nations had an urbanization level of 71%, compared to 31% in developing countries. However, experts calculate that by 2025, these levels will practically even out, with an urbanization level of 74% for developing countries and 77% for developed countries. By 2025, 25 cities will have populations of over 9 million, including Mexico City (25.8), Sao Paulo (24.0), Tokyo (20.2), Calcutta (16.5), Greater Bombay (16.0), and New York (15.8).

  16. Integrable quantum Stäckel systems

    International Nuclear Information System (INIS)

    Błaszak, Maciej; Domański, Ziemowit; Sergyeyev, Artur; Szablikowski, Błażej M.

    2013-01-01

    The Stäckel separability of a Hamiltonian system is well known to ensure existence of a complete set of Poisson commuting integrals of motion quadratic in the momenta. We consider a class of Stäckel separable systems where the entries of the Stäckel matrix are monomials in the separation variables. We show that the only systems in this class for which the integrals of motion arising from the Stäckel construction keep commuting after quantization are, up to natural equivalence transformations, the so-called Benenti systems. Moreover, it turns out that the latter are the only quantum separable systems in the class under study.

  17. Specification For ST-5 Li Ion Battery

    Science.gov (United States)

    Castell, Karen D.; Day, John H. (Technical Monitor)

    2000-01-01

    This Specification defines the general requirements for rechargeable Space Flight batteries intended for use in the ST-5 program. The battery chemistry chosen for this mission is lithium ion (Li-Ion).

  18. Location - Managed Facility - St. Paul District (MVP)

    Data.gov (United States)

    Army Corps of Engineers, Department of the Army, Department of Defense — St. Paul District - US Army Corps of Engineers Managed Facility locations. District headquarters, Natural Resource, Recreation, Lock and Dam, and Regulatory offices...

  19. Control Strategy Tool (CoST)

    Data.gov (United States)

    U.S. Environmental Protection Agency — The EPA Control Strategy Tool (CoST) is a software tool for projecting potential future control scenarios, their effects on emissions and estimated costs. This tool...

  20. 2014 Lidar DEM: St. Charles Parish (LA)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Under this task order, Precision Aerial Reconnaissance, LLC was contracted to provide acquisition and processing of airborne Lidar over St. Charles Parish,...

  1. Nursing research in the 21 st century

    Directory of Open Access Journals (Sweden)

    Roger Watson

    2013-01-01

    Conclusion: Nursing research has developed greatly over the past century and continues to develop in the 21 st century. Nursing research is relevant to the needs of patients and has had an impact on clinical practice.

  2. 2008 St. Johns County, FL Countywide Lidar

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Airborne terrestrial LiDAR was collected for St. Johns County, FL. System Parameters/Flight Plan. The LiDAR system acquisition parameters were developed based on a...

  3. Meteor detection on ST (MST) radars

    International Nuclear Information System (INIS)

    Avery, S.K.

    1987-01-01

    The ability to detect radar echoes from backscatter due to turbulent irregularities of the radio refractive index in the clear atmosphere has lead to an increasing number of established mesosphere - stratosphere - troposphere (MST or ST) radars. Humidity and temperature variations are responsible for the echo in the troposphere and stratosphere and turbulence acting on electron density gradients provides the echo in the mesosphere. The MST radar and its smaller version, the ST radar, are pulsed Doppler radars operating in the VHF - UHF frequency range. These echoes can be used to determine upper atmosphere winds at little extra cost to the ST radar configuration. In addition, the meteor echoes can supplement mesospheric data from an MST radar. The detection techniques required on the ST radar for delineating meteor echo returns are described

  4. St. John's Wort (Hypericum Perforatum) and Pregnancy

    Science.gov (United States)

    ... amount of time it takes your body to eliminate half of the dose of the medication). It ... 2006. St. John’s wort (Hypericum perforatum) and breastfeeding: plasma and breast milk concentrations of hyperforin for 5 ...

  5. Fossil fuels in the 21st century.

    Science.gov (United States)

    Lincoln, Stephen F

    2005-12-01

    An overview of the importance of fossil fuels in supplying the energy requirements of the 21st century, their future supply, and the impact of their use on global climate is presented. Current and potential alternative energy sources are considered. It is concluded that even with substantial increases in energy derived from other sources, fossil fuels will remain a major energy source for much of the 21st century and the sequestration of CO2 will be an increasingly important requirement.

  6. St Sava and the cloud-chasers

    OpenAIRE

    Loma Aleksandar

    2013-01-01

    A gloss in the Nomocanon of St Sava condemns folk superstitions related to magically provoking hailstorms and eclipses. St Sava’s miracle with the king of Hungary as described in his Vitae seems to go back to the same complex of popular beliefs. Its acceptance by the hagiography was probably due to the influence of the figure of prince magician as common to the Serbian and the Russian oral epics.

  7. St Sava and the cloud-chasers

    Directory of Open Access Journals (Sweden)

    Loma Aleksandar

    2013-01-01

    Full Text Available A gloss in the Nomocanon of St Sava condemns folk superstitions related to magically provoking hailstorms and eclipses. St Sava’s miracle with the king of Hungary as described in his Vitae seems to go back to the same complex of popular beliefs. Its acceptance by the hagiography was probably due to the influence of the figure of prince magician as common to the Serbian and the Russian oral epics.

  8. St. James marine terminal facility description

    Energy Technology Data Exchange (ETDEWEB)

    1993-10-01

    The US Department of Energy (DOE) currently owns and operates a marine terminal on the west bank of the Mississippi River at St. James, Louisiana. The St. James facility was constructed by the Department to provide marine services associated with the fill and drawdown of the Strategic Petroleum Reserve (SPR) crude oil storage facilities located at Bayou Choctaw and Weeks Island, Louisiana. Although strategic to the mission of the SPR in the event of a national emergency, the St. James terminal is situated such that it has a high potential to also serve the commercial industry`s needs for crude oil terminalling and storage. The St. James terminal is located approximately 45 miles west of New Orleans and 30 miles southeast of Baton Rouge, and approximately 160 miles upstream from the mouth of the Mississippi River. Construction of the St. James terminal was initiated in 1978 and was completed in 1980. Since then, the terminal has received and transferred over 125 million barrels of crude oil to the SPR sites for storage. For crude oil distribution, the St. James terminal was connected to the neighboring LOCAP terminal by a 0.1 mile 36-inch pipeline in 1981 and to the Capline terminal by a 0.5 mile 30-inch pipeline in 1988. The terminal also has a 30-inch pipeline connection to the Koch oil terminal which was used for initial fill purposes; however, this pipeline has been disconnected and is currently inactive. A complete description of the St. James terminal facilities, operational capabilities, operational certifications, and future Government requirements are presented in Sections 2, 3, 4, and 5 respectively.

  9. 76 FR 68101 - Safety Zone; Art Gallery Party St. Pete 2011 Fireworks Display, Tampa Bay, St. Petersburg, FL

    Science.gov (United States)

    2011-11-03

    ... [Docket No. USCG-2011-0774] RIN 1625-AA00 Safety Zone; Art Gallery Party St. Pete 2011 Fireworks Display... St. Petersburg, Florida during the Art Gallery Party St. Pete 2011 Fireworks Display on Friday... November 11, 2011, Creative Pyrotechnics is sponsoring the Art Gallery Party St. Pete 2011 Fireworks...

  10. 78 FR 16780 - Special Local Regulation; 2013 International Rolex Regatta; St. Thomas Harbor; St. Thomas, U.S...

    Science.gov (United States)

    2013-03-19

    ... 1625-AA08 Special Local Regulation; 2013 International Rolex Regatta; St. Thomas Harbor; St. Thomas, U... is establishing special local regulations on the waters of St. Thomas Harbor in St. Thomas, U. S.... Thomas Yacht Club is sponsoring the 2013 Rolex Regatta, a series of sail boat races. The races will be...

  11. The Role of the st313-td Gene in Virulence of Salmonella Typhimurium ST313

    DEFF Research Database (Denmark)

    Herrero-Fresno, Ana; Wallrodt, Inke; Leekitcharoenphon, Pimlapas

    2014-01-01

    Multidrug-resistant Salmonella enterica serovar Typhimurium ST313 has emerged in sub-Saharan Africa causing severe infections in humans. Therefore, it has been speculated that this specific sequence type, ST313, carries factors associated with increased pathogenicity. We assessed the role...

  12. St. Thomas and St. John, U.S. Virgin Islands Coastal Digital Elevation Model

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The 1/3 arc-second St. Thomas and St. John, U.S. Virgin Islands Coastal Digital Elevation Model will be used to support NOAA's tsunami forecast system and for...

  13. The marine Algal Vegetation of St. Martin, St. Eustatius and Saba (Netherlands Antilles)

    NARCIS (Netherlands)

    Vroman, M.

    1968-01-01

    Along the coast of St. Martin, St. Eustatius and Saba the rocks above sea-level often show a number of differently coloured zones. This is clearly visible when the coast over a larger distance is formed by one type of rock, as for instance on Saba. In many places a light-coloured belt is seen above

  14. ST depression in lead aVL differentiates inferior ST-elevation myocardial infarction from pericarditis.

    Science.gov (United States)

    Bischof, Johanna E; Worrall, Christine; Thompson, Peter; Marti, David; Smith, Stephen W

    2016-02-01

    ST-segment elevation (STE) due to inferior STE myocardial infarction (STEMI) may be misdiagnosed as pericarditis. Conversely, this less life-threatening etiology of ST elevation may be confused for inferior STEMI. We sought to determine if the presence of any ST-segment depression in lead aVL would differentiate inferior STEMI from pericarditis. Retrospective study of 3 populations. Cohort 1 included patients coded as inferior STEMI, cohort 2 included patients with a discharge diagnosis of pericarditis who presented with chest pain and at least 0.5 mm of ST elevation in at least 1 inferior lead. We analyzed the presenting electrocardiogram in both populations, with careful assessment of leads II, III, aVF, and aVL. In addition, we retrospectively studied a third cohort of patients with subtle inferior STEMI (pericarditis group, all 49 had some inferior STE but none had any ST-segment depression in lead aVL (specificity, 100%; confidence interval, 91%-100%). In the third cohort, there were 272 inferior MIs with coronary occlusion, of which 54 were "subtle." Of these, 49 had some ST depression in lead aVL. When there is inferior ST-segment elevation, the presence of any ST depression in lead aVL is highly sensitive for coronary occlusion in inferior myocardial infarction and very specific for differentiating inferior myocardial infarction from pericarditis. Copyright © 2015 Elsevier Inc. All rights reserved.

  15. Three members of Medicago truncatula ST family are ubiquitous during development and modulated by nutritional status (MtST1) and dehydration (MtST2 and MtST3).

    Science.gov (United States)

    Albornos, Lucía; Martín, Ignacio; Labrador, Emilia; Dopico, Berta

    2017-07-10

    ShooT specific/Specific Tissue (ST) belong to a protein family of unknown function characterized by the DUF2775 domain and produced in specific taxonomic plant families, mainly Fabaceae and Asteraceae, with the Medicago truncatula ST family being the largest. The putative roles proposed for this family are cell elongation, biotic interactions, abiotic stress and N reserve. The aim of this work was to go deeper into the role of three M. truncatula ST proteins, namely ST1, ST2 and ST3. Our starting hypothesis was that each member of the family could perform a specific role, and hence, each ST gene would be subjected to a different type of regulation. The search for cis-acting regulatory elements (CREs) in silico in pST1, pST2 and pST3 promoters showed prevalence of tissue/organ specific motifs, especially root- and seed-specific ones. Light, hormone, biotic and abiotic related motifs were also present. None of these pSTs showed the same combination of CREs, or presented the same activity pattern. In general, pST activity was associated with the vascular cylinder, mainly in roots. Promoter activation was highly specific and dissimilar during reproductive development. The ST1, ST2 and ST3 transcripts accumulated in most of the organs and developmental stages analysed - decreasing with age - and expression was higher in the roots than in the aerial parts and more abundant in light-grown plants. The effect of the different treatments on transcript accumulation indicated that ST1 behaved differently from ST2 and ST3, mainly in response to several hormones and dehydration treatments (NaCl or mannitol), upon which ST1 transcript levels decreased and ST2 and ST3 levels increased. Finally, the ST1 protein was located in the cell wall whereas ST2 and ST3 were present both in the cytoplasm and in the cell wall. The ST proteins studied are ubiquitous proteins that could perform distinct/complementary roles in plant biology as they are encoded by differentially regulated genes

  16. VaST: A variability search toolkit

    Science.gov (United States)

    Sokolovsky, K. V.; Lebedev, A. A.

    2018-01-01

    Variability Search Toolkit (VaST) is a software package designed to find variable objects in a series of sky images. It can be run from a script or interactively using its graphical interface. VaST relies on source list matching as opposed to image subtraction. SExtractor is used to generate source lists and perform aperture or PSF-fitting photometry (with PSFEx). Variability indices that characterize scatter and smoothness of a lightcurve are computed for all objects. Candidate variables are identified as objects having high variability index values compared to other objects of similar brightness. The two distinguishing features of VaST are its ability to perform accurate aperture photometry of images obtained with non-linear detectors and handle complex image distortions. The software has been successfully applied to images obtained with telescopes ranging from 0.08 to 2.5 m in diameter equipped with a variety of detectors including CCD, CMOS, MIC and photographic plates. About 1800 variable stars have been discovered with VaST. It is used as a transient detection engine in the New Milky Way (NMW) nova patrol. The code is written in C and can be easily compiled on the majority of UNIX-like systems. VaST is free software available at http://scan.sai.msu.ru/vast/.

  17. Draft Genome Sequences of Staphylococcus aureus AMRF1 (ST22) and AMRF2 (ST672), Ocular Methicillin-Resistant Isolates

    KAUST Repository

    Velusamy, Nithya

    2014-03-20

    Sequence type 22 (ST22) and ST672 are the two major emerging clones of community-acquired methicillin-resistant Staphylococcus aureus in India. ST672 strains were found to cause severe ocular infections. We report the draft genome sequences of two emerging strains of methicillin-resistant S. aureus, AMRF1 (ST22) and AMRF2 (ST672), isolated from patients with ocular infections.

  18. Selective Reproduction in the 21st Century

    DEFF Research Database (Denmark)

    In the 21st century, human reproduction increasingly involves decisions about which gametes to fertilize, which embryos to implant, or which fetuses to abort. The term ‘selective reproduction’ refers to these increasingly widespread efforts to bring specific kinds of children into being. To this ......In the 21st century, human reproduction increasingly involves decisions about which gametes to fertilize, which embryos to implant, or which fetuses to abort. The term ‘selective reproduction’ refers to these increasingly widespread efforts to bring specific kinds of children into being...... detection of fetal anomalies during prenatal screening and testing programs, the development of preimplantation genetic diagnosis techniques as well as the screening of potential gamete donors by egg agencies and sperm banks. Selective Reproduction in the 21st Century provides unique ethnographic insights...

  19. Analyse of Maintenance Cost in ST

    CERN Document Server

    Jenssen, B W

    2001-01-01

    An analyse has been carried out in ST concerning the total costs for the division. Even though the target was the maintenance costs in ST, the global budget over has been analysed. This has been done since there is close relation between investments & consolidation and the required level for maintenance. The purpose of the analyse was to focus on maintenance cost in ST as a ratio of total maintenance costs over the replacement value of the equipment, and to make some comparisons with other industries and laboratories. Families of equipment have been defined and their corresponding ratios calculated. This first approach gives us some "quantitative" measurements. This analyse should be combined with performance indicators (more "qualitative" measurements) that are telling us how well we are performing. This will help us in defending our budget, make better priorities, and we will satisfy the requirements from our external auditors.

  20. Materials for the 21st century

    CERN Document Server

    Segal, David

    2017-01-01

    The book is a general text that shows how materials can contribute to solving problems facing nations in the 21st century. It is illustrated with diverse applications and highlights the potential of existing materials for everyday life, healthcare and the economies of nations. There are 13 chapters and a glossary of 500 materials with their descriptions, historical development, their use or potential use and a range of references. Specific areas include synthetic polymers (e.g. nylon), natural polymers (e.g. proteins, cellulose) and the role of materials in the development of digital computers and in healthcare. Solid-state lighting, energy supplies in the 21st century, disruptive technologies and intellectual property, in particular patents, are discussed. The book concludes by asking how the 21st century will be characterised. Will it be the Silicon Age, Genomic Age or New Polymer Age, as examples?

  1. Detection of methicillin-resistant Staphylococcus pseudintermedius ST169 and novel ST354 SCCmec II-III isolates related to the worldwide ST71 clone.

    Science.gov (United States)

    Ishihara, K; Koizumi, A; Saito, M; Muramatsu, Y; Tamura, Y

    2016-01-01

    The recent appearance of methicillin-resistant Staphylococcus pseudintermedius (MRSP) is a concern for both veterinary and human healthcare. MRSP clonal lineages with sequence type (ST) 71-spa t02-staphylococcal cassette chromosome mec (SCCmec) II-III and ST68-spa t06-SCCmec V have spread throughout Europe and North America, respectively. The current study compared the molecular characteristics of 43 MRSP isolates from dogs in Japan with those of MRSP from previous reports using multilocus sequence typing based on seven housekeeping genes, SCCmec typing, and detection of antimicrobial resistance genes. Three related clonal lineages, ST71, ST169, and the newly registered ST354, were observed in SCCmec II-III isolates from Japan, despite MRSP SCCmec II-III isolates being thought to belong to a single clonal lineage. The majority of SCCmec II-III isolates belonging to ST169 (9/11) and ST354 (3/3), but not ST71 (0/11), harboured tetM. Four STs were observed for the SCCmec V isolates; however, neither ST68 nor related STs were found in the Japanese MRSP isolates. In conclusion, MRSP SCCmec II-III isolates from Japan belonged to ST71 and related STs (ST169 and ST354). A variety of MRSP SCCmec V clones, including some novel clones, were identified.

  2. The 21st Century as Whose Century?

    Directory of Open Access Journals (Sweden)

    David Scott

    2015-08-01

    Full Text Available Macro-analysis and East-West encounter are shown through consideration of objective yet subjective constructed concepts for the international system and international economy in the 21st century. Three paradigms are considered, namely the 21st century as the ‘Pacific Century’, as ‘China’s Century’ and as the ‘Asian Century’. Overlaps are shown between these three paradigms, as also developments in time, and gradually shift in geographical location. The ‘Pacific Century’, and its associated Rimspeak, was the paradigm emerging in the late 1970s, knitting together America’s West Coast and the Japanese economy. By the late 1980s this was already shifting to talk of the 21st century likely to be an ‘Asian Century’ model, mark-1, based on the Pacific Asia dynamism shown by the ‘Asian Tigers’ and Japan. However, the Asian financial crash of 1997-8, and the economic downturn in Japan, meant that such an ‘Asian Century’ seemed premature as the 21st century arrived. Instead, it was China’s economic growth that seemed most evident, and with it the concept of the 21st century as ‘China’s Century’. However, in turn that has already been modified during the first decade of the century by India’s arrival as a rapidly growing economy. Consequently the 21st century as ‘China’s Century’ and as ‘India’s Century’ has been combined into talk of an ‘Asian Century’, mark-2.

  3. Omsorg/støtte i ungdomsskolen

    OpenAIRE

    Vasseng, Eli Dahl

    2012-01-01

    Master's thesis in Special education Denne studien handler om forholdet mellom lærer-elev og ser på hvordan ungdomsskoleelever beskriver omsorgsfulle/støttende lærere og den betydning det har for motivasjon i skolearbeid og læringsmiljø. Jeg har tatt utgangspunkt i ungdomsskoleelevenes forståelse av fenomenet omsorg/støtte og brukt en fenomenologisk tilnærming med intervju som metode. Seks elever fra ungdomstrinnet ble intervjuet og jeg har brukt en intervjuguide som er bygget på det teore...

  4. 51st North American Chemical Residue Workshop.

    Science.gov (United States)

    Yang, Paul; Martos, Perry; Barrett, Brad

    2015-06-03

    Manuscripts collected in this 51st North American Chemical Residue Workshop (NACRW) Symposium issue of the Journal of Agricultural and Food Chemistry (JAFC) were originally presented at the 51st NACRW meeting. The 2014 NACRW JAFC symposium collects 14 publications representing the broad range of topics in chemical analyses presented at the 2014 meeting. These include the analysis of chemical residues and contaminants in food, environment, feed, botanical, and bee samples as well as the application of quality control/quality assurance protocols in routine and method development.

  5. Statistics in the 21st century

    CERN Document Server

    Wells, Martin T; Wells, Martin T

    2001-01-01

    Exactly what is the state of the art in statistics as we move forward into the 21st century? What promises, what trends does its future hold? Through the reflections of 70 of the world's leading statistical methodologists, researchers, theorists, and practitioners, Statistics in the 21st Century answers those questions. Originally published in the Journal of the American Statistical Association, this collection of vignettes examines our statistical past, comments on our present, and speculates on our future. Although the coverage is broad and the topics diverse, it reveals the essential intell

  6. Kirjallisuuskatsaus tiimityöstä

    OpenAIRE

    Uimi, Jutta

    2012-01-01

    Laurea-ammattikorkeakoulu Tiivistelmä Laurea Lohja Hoitotyön koulutusohjelma Uimi Jutta Kirjallisuuskatsaus tiimityöstä Vuosi 2012 Sivumäärä 43 Tämän opinnäytetyön tavoitteena oli kuvata kirjallisuuskatsauksen muodossa, miten tiimityö määritellään terveydenhuollon organisaatiossa ja tiimityön käytettävyyttä sekä millaisissa yhteyksissä tiimityötä käytetään. Tarkoituksena oli tuottaa tutkittua tietoa tiimityöstä Helsingin ja Uudenmaan sairaanhoitopiiriin (HUS) kuulu...

  7. Verdens største blomsterudstilling

    DEFF Research Database (Denmark)

    Larsen, Bjarne

    2011-01-01

    Verdens største blomsterudstilling fi nder sted i udkanten af London hvert år i juli måned. Det er parken omkring det tidligere kongepalads Hampton Court palace, der danner de fantastiske omgivelser for det enorme blomster- og haveshow......Verdens største blomsterudstilling fi nder sted i udkanten af London hvert år i juli måned. Det er parken omkring det tidligere kongepalads Hampton Court palace, der danner de fantastiske omgivelser for det enorme blomster- og haveshow...

  8. Nursing theory: the 21st century.

    Science.gov (United States)

    Randell, B P

    1992-01-01

    On September 21, 1990, at the University of California, Los Angeles, Neuropsychiatric Institute and Hospital, six nurse theorists participated in a panel discussion on theory development for the 21st century. The theorists included Dorothy Johnson, Betty Neuman, Dorothea E. Orem, Rosemarie Rizzo Parse, Martha E. Rogers and Callista Roy. The panel provided the participants the opportunity to speculate on the course for future development of nursing knowledge. Three questions were posed to the panel relating to the development of their models, the direction nursing theory will take in the 21st century, and current research emerging from the extant theories. The panel also addressed questions from the audience.

  9. Mystic of St. Seraphim of Sarov and St. Francis of Assisi

    Directory of Open Access Journals (Sweden)

    Mirosław Białous

    2015-11-01

    Full Text Available This paper presents figures of St. Seraphim and St. Francis, comparing their mystic. Both saints are regarded as typical representatives of his age and his milieu: St. Seraphim – of the Eastern Orthodox Christian mystic, St. Francis – of the Christian West, the Roman Catholic mysticism. Similar was their life of poverty, similar the joy of life and the attitude towards nature, similar the ecclesial and sacramental dimension of their spirituality. But there were differences. St. Francis’ mystic is more associated with the sphere of emotional and material world, with the earthly reality. And St. Seraphim is a faithful follower of the monastic tradition of Mount Sinai, of Athos and of the other representatives of hesychasm who remaining in the earthly body experienced the spiritual liberation. These differences are visible, if we compare the experience of Christ by Seraphim on Great Thursday and the vision of St Francis on the mountain of Alvernia.

  10. REFORMED THEOLOGY FOR THE 21ST CENTURY ...

    African Journals Online (AJOL)

    pressed in these volumes warrant a thorough and detailed study. It is not feasible to give a summary of the .... resemble the faces of consecutive generations in a family photo album: They do not look alike … They do not .... as directive the presentation of the providence of God in the Heidelberg. Catechism, even for the 21st ...

  11. Materials Testing in the 21st Century

    Science.gov (United States)

    1988-10-01

    34, Proceedings of the 31st Sagamore Army Materials Research Conference, Plenum Press, NY, 603 pp. (1986). 30. Clay Olaf Ruud and Robert E. Green, Jr., eds...Fort Monmout h, NJ 07703 ATTN: AMSEL-TDD , Mr. T. A. Pfe i ffe r , Technical Dir. Di rector, El ectroni c Technology and Devices Lab, f or t

  12. Learning Analytics for 21st Century Competencies

    Science.gov (United States)

    Buckingham Shum, Simon; Crick, Ruth Deakin

    2016-01-01

    Many educational institutions are shifting their teaching and learning towards equipping students with knowledge, skills, and dispositions that prepare them for lifelong learning, in a complex and uncertain world. These have been termed "21st century competencies." Learning analytics (LA) approaches in general offer different kinds of…

  13. St. Emmanuel, Simon-Peter Ayooluwa

    African Journals Online (AJOL)

    St. Emmanuel, Simon-Peter Ayooluwa. Vol 6 (2015) - Articles Xenophobia: A crime against humanity and its attendant implications on human rights. Abstract PDF. ISSN: 2276-7371. AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians · for Authors · FAQ's · More about AJOL · AJOL's Partners ...

  14. 51 ST. AUGUSTINE VERSUS NIGERIA ON CORPORATE ...

    African Journals Online (AJOL)

    Tracie1

    Angwe Ken Agede:St. Augusrine Versus Nigeria on Corporate Corruption and impunity… 53 ... and South. Korea are making frantic efforts to curЛ this trend. It ... interest in philosophy and re-oriented his values. In a draft of a correspondence of 371 to his mother. Augustine shares his discovery and contemplates course.

  15. Ambulant ST-segmentmonitorering efter akut myokardieinfarkt

    DEFF Research Database (Denmark)

    Mickley, H; Junker, A; Friis, E V

    1994-01-01

    Over the last decade the concept of silent myocardial ischaemia has received considerable attention. Without doubt, the increased use of ambulatory ST-segment monitoring is the most important reason for the growing interest in this field. The prevalence of ambulatory ischaemia after myocardial in...

  16. Eesti goes St. Etienne / Anna Roomet

    Index Scriptorium Estoniae

    Roomet, Anna

    2006-01-01

    Näitus Eesti Kunstiakadeemia tootedisaini osakonna magistrantide viimase kahe aasta projektide paremikust esindas Eestit disainibiennaalil St. Etiennis Prantsusmaal. Näituse panid üles Pent Talvet ja Pavel Sidorenko, näitusel osalejad: Anna-Maria Einla, Kätlin Kangur, Triin Kuusler, Andri Laidre, Veiko Liis, Liina-Kai Raivet, P. Sidorenko, P. Talvet, Ingela Viks, Triin Voss

  17. 78 FR 44927 - 101st Commission Meeting

    Science.gov (United States)

    2013-07-25

    ... From the Federal Register Online via the Government Publishing Office ARCTIC RESEARCH COMMISSION 101st Commission Meeting Notice is hereby given that the U.S. Arctic Research Commission will hold its... language interpreters, must inform the Commission of those needs in advance of the meeting. Contact person...

  18. Morphing into a 21st Century Trainer.

    Science.gov (United States)

    Mager, R. F.

    1996-01-01

    Forces that will affect trainers into the next century include rapid change, information overload, globalization, downsizing, empowerment, and remote worksites. Key characteristics of a 21st-century trainer include performance orientation, technical skills, social skills, self-employability, bilingualism, and international competence. (JOW)

  19. [Military doctors and Community of St. Eugene].

    Science.gov (United States)

    Poddubnyĭ, M V

    2012-01-01

    Article focuses on the role of military physicians in the establishment and operation of the Community of St. Eugene in St. Petersburg (1882-1918). Since 1900 the hospital functioned as a community of 3 pavilions, which had 84 regular beds, including 15 free. At various times in outpatient clinics and courses of the Community of St. Eugene worked different professors of Military-medical Academy: ophthalmologist Bellyarminov L.G., physician Manassein V.A., medicolegist Kosorotov D.P. and assistant professors Danillo S.N. and Popov. In the implementation of a "medical project" Community of St. Eugene exceptional role belonged to MD Aleksey Belyaev, a staff member of the Main Military Medical Administration, also chairing the editorial board "Military-medical journal". Role of community in care for the wounded during the Russian-Japanese war and World Wars is significant. Russian Community of fame has been associated with the outbreak in 1898, long-term activities for the production of art publications.

  20. Towards a 21st century ready curriculum

    NARCIS (Netherlands)

    Vloon, N.G.J.; Hammer, M.H.M.; Brahimi, N.

    2015-01-01

    Entrepreneurship and entrepreneurship education is generally viewed upon as being important for economic growth in the 21st century. Teaching entrepreneurship however seems to need another approach than regular education to fulfill the professional and ever changing needs. In this perspective active

  1. Life Parallels Art at St. Bonaventure

    Science.gov (United States)

    Lewis, Lionel S.

    2002-01-01

    In this article, the author chronicles the summary firing of Joseph Greer, a veteran sociology professor, over allegations of racism that evoke comparison to a Philip Roth novel about political correctness run amuck. Unlike the fictional story, the faculty at St. Bonaventure University did not seem to have much of an appetite for censuring…

  2. Bathymetry (2011) for Fish Bay, St. John

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a LiDAR (Light Detection & Ranging) 0.3x0.3 meter resolution depth surface for Fish Bay, St. John in the U.S. Virgin Islands (USVI). The...

  3. Bathymetry (2011) for Coral Bay, St. John

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a LiDAR (Light Detection & Ranging) 0.3x0.3 meter resolution depth surface for Coral Bay, St. John in the U.S. Virgin Islands (USVI). The...

  4. Psychological Science in the 21st Century

    Science.gov (United States)

    Cacioppo, John T.

    2013-01-01

    Science is constantly changing. If one hopes to keep pace with advances in science, one cannot simply repeat what one has done in the past, whether deciding how to invest limited research funds, searching to replace a retiring colleague, or teaching introductory psychology. Psychological science in the 21st century is more central and integrated…

  5. St. Luke's Medical Center: technologizing health care

    International Nuclear Information System (INIS)

    Tumanguil, S.S.

    1994-01-01

    The computerization of the St. Luke's Medical Center improved the hospital administration and management, particularly in nuclear medicine department. The use of computer-aided X-ray simulator machine and computerized linear accelerator machine in diagnosing and treating cancer are the most recent medical technological breakthroughs that benefited thousands of Filipino cancer patients. 4 photos

  6. St Vincent Youth and Careers in Agriculture

    Science.gov (United States)

    Webster, Nicole; Ganpat, Wayne

    2014-01-01

    Purpose: Given the ageing farming population in the Caribbean and the importance of agriculture to economy, there is cause for concern about the future of farming. This study seeks to explore the extent to which students pursuing agriculture in secondary schools in St Vincent and the Grenadines (SVG) were likely to engage in farming as well as…

  7. Material Connections: Steuart Building, St. Albans School.

    Science.gov (United States)

    Stephens, Suzanne

    1980-01-01

    The addition to the St. Albans campus in Washington, D.C., relates both to the style and the siting of the older "collegiate gothic" school nearby. The mixed-use building contains five classrooms, art and music spaces, and a student lounge. (Author/MLF)

  8. The 21st Century Information Environment.

    Science.gov (United States)

    Badger, Rod

    This paper on the 21st century information environment begins with a section that discusses the impact of e-commerce over the next ten years. The second section addresses government focus areas, including ensuring a telecommunications infrastructure, developing the IT (information technology) industry, promoting innovation and entrepreneurship,…

  9. Antifatigue Effect of Millettiae speciosae Champ (Leguminosae ...

    African Journals Online (AJOL)

    (MSE) was orally administered to mice in 500, 1000, 2000 mg/kg doses to investigate its anti-fatigue effect in both forced swimming and climbing tests. Glycogen, triglyceride (TG), blood urea nitrogen (BUN) and creatine phosphokinase (CK) levels in plasma which can indicate alterations in energy utilization during exercise ...

  10. Anticariogenic Activity of Lagerstroemia speciosa (L.) | Vivek ...

    African Journals Online (AJOL)

    Science, Technology and Arts Research Journal. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 1, No 1 (2012) >. Log in or Register to get access to full text downloads.

  11. Fort St. Vrain operations and future

    International Nuclear Information System (INIS)

    Brey, H.L.

    1991-01-01

    June 1989 resulted in the highest electric generation month in the history of the Fort St. Vrain plant. This culminated an excellent operating period involving the first half of 1988. The plant was then shutdown in July on a scheduled outage to make repairs in the main steam drive section of all of the helium circulators. This outage was significantly extended due to problems with moisture ingress into the primary coolant felt to be primarily from the core support floor section of the liner cooling system. 1989 also marks the 10th Anniversary of Fort St. Vrain as a commercial nuclear power plant. Electrical generation from this plant throughout this period has not been good, generally because of the prototypical nature of key plant components, primarily the helium circulators. Also, throughout this period there has been substantial increase in operations, maintenance, and fuel costs which could not be offset by the sale of electricity from the plant. This led to the decision to shutdown Fort St. Vrain permanently on or before June 30, 1990. The lessons learned and operational experiences from Fort St. Vrain have been substantial for the development of the Gas-Cooled Reactor Program and in achieving a safe, commercially viable plant design for the MHTGR. Superb fuel performance has not only provided a radiologically clean plant, but has achieved significant safety attributes in the licensing of the MHTGR. Equipment performance for Fort St. Vrain on key components and systems such as the steam generators, purification system control rod drives, and many others has been factored into the design of the MHTGR. Additional benefits are anticipated as the plant completes its operating phase and goes through defueling and decommissioning. As primary system components become available and are physically evaluated, further valuable data will be secured for the benefit of the MHTGR. (author)

  12. From 21st century skills to 21st century human being

    DEFF Research Database (Denmark)

    Hjøllund, Niels-Peder Osmundsen; Jørgensen, Tobias Heiberg

    2017-01-01

    CLD and we must take the next step, where we stop thinking about skills and competencies and start thinking and acting on the fundamental existential implication of the 21st century. What we need now is not more 21st century skills, but 21st century human beings....... of the presentation will be the ideas and experiences of ‘Future Classroom Lab’, which is a ground-breaking initiative promoting new ways of handling the education of the teachers and pedagogues of tomorrow. Media and technologies are inevitable conditions in our everyday life in 2017 and therefore...... they are conditions that need to be addressed in the training of teachers and pedagogues. Professional understanding and application of technologies and media are thus a key element in the basic professional competences of the teachers and pedagogues of tomorrow. We are all now well underway in our thinking of 21st...

  13. LiDAR Relative Reflectivity Surface (2011) for the St. Thomas East End Reserve, St. Thomas

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a LiDAR (Light Detection & Ranging) 0.3x0.3 meter resolution relative seafloor reflectivity surface for the St. Thomas East End Reserve...

  14. CDC WONDER: Population - Bridged-Race July 1st Estimates

    Data.gov (United States)

    U.S. Department of Health & Human Services — The Population - Bridged-Race July 1st Estimates online databases report bridged-race population estimates of the July 1st resident population of the United States,...

  15. Dying hard industrial carnage in st lawrence, newfoundland

    CERN Document Server

    Leyton, Elliott

    2004-01-01

    Dying Hard: Industrial Carnage in St. Lawrence, Newfoundland is a series of first-hand accounts by miners suffering from industrial diseases contracted while working in the fluorspar mines of St. Lawrence, Newfoundland.

  16. Epidemic potential of Escherichia coli ST131 and Klebsiella pneumoniae ST258: a systematic review and meta-analysis

    Science.gov (United States)

    Dautzenberg, M J D; Haverkate, M R; Bonten, M J M; Bootsma, M C J

    2016-01-01

    Objectives Observational studies have suggested that Escherichia coli sequence type (ST) 131 and Klebsiella pneumoniae ST258 have hyperendemic properties. This would be obvious from continuously high incidence and/or prevalence of carriage or infection with these bacteria in specific patient populations. Hyperendemicity could result from increased transmissibility, longer duration of infectiousness, and/or higher pathogenic potential as compared with other lineages of the same species. The aim of our research is to quantitatively estimate these critical parameters for E. coli ST131 and K. pneumoniae ST258, in order to investigate whether E. coli ST131 and K. pneumoniae ST258 are truly hyperendemic clones. Primary outcome measures A systematic literature search was performed to assess the evidence of transmissibility, duration of infectiousness, and pathogenicity for E. coli ST131 and K. pneumoniae ST258. Meta-regression was performed to quantify these characteristics. Results The systematic literature search yielded 639 articles, of which 19 data sources provided information on transmissibility (E. coli ST131 n=9; K. pneumoniae ST258 n=10)), 2 on duration of infectiousness (E. coli ST131 n=2), and 324 on pathogenicity (E. coli ST131 n=285; K. pneumoniae ST258 n=39). Available data on duration of carriage and on transmissibility were insufficient for quantitative assessment. In multivariable meta-regression E. coli isolates causing infection were associated with ST131, compared to isolates only causing colonisation, suggesting that E. coli ST131 can be considered more pathogenic than non-ST131 isolates. Date of isolation, location and resistance mechanism also influenced the prevalence of ST131. E. coli ST131 was 3.2 (95% CI 2.0 to 5.0) times more pathogenic than non-ST131. For K. pneumoniae ST258 there were not enough data for meta-regression assessing the influence of colonisation versus infection on ST258 prevalence. Conclusions With the currently available data

  17. St. Lukes' Survey on vaccination coverage | Quartero | Malawi ...

    African Journals Online (AJOL)

    St. Lukes hospital, a PRAM unit in Zomba district, had an estimated vaccination coverage of 44% in 1990. To conf"1rID this very low coverage, a survey was done in the 5 km catchment area around the hospital. 611 children, being 104% of the estimated number, bom between 1st June 1989 and 31st May 1990 were ...

  18. The cognitive status of stød

    DEFF Research Database (Denmark)

    Clausen, Sara Juul; Kristensen, Line Burholt

    2015-01-01

    The Danish prosodic phenomenon stød is associated with a specific range of suffixes including the singular definite suffixes -en and -et. Diachronically, as well as distributionally, stød is related to Swedish/Norwegian accent 1, but unlike accent 1, stød is seen as phonetically and phonologicall...

  19. GeoTIFF of 3x3 m Bathymetry for St. Thomas & St. John, 2011, UTM 20N NAD83

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a LiDAR (Light Detection & Ranging) 3x3 meter resolution bathymetric surface for an area of shallow seabed surrounding St. Thomas and St....

  20. Ticks on livestock in St. Lucia.

    Science.gov (United States)

    Garris, G I; Scotland, K

    1985-12-01

    Cattle, sheep, goats and horses were examined for ticks. Over 95% of Holstein cross-breeds, 28% of sheep (local mixed breeds) and 18% of goats (local mixed breeds) examined from 18 August to 4 September 1983 were infested with the southern cattle tick, Boophilus microplus Canestrini. About 90 and 17% of the horses examined were infested with the tropical horse tick, Anocentor nitens Neumann, and the tropical bont tick, Amblyomma variegatum Fabricius, respectively. The tropical bont tick was found infesting 10% of cattle in the Gros Islet area of St. Lucia. The tropical bont tick was also found associated with a severe skin disease, dermatophilosis, caused by the bacterium Dermatophilus congolensis, in 54% of the cattle infested by A. variegatum in the Gros Islet and Dauphin areas of St. Lucia.

  1. Possible Future SOFC - ST Based Power Plants

    DEFF Research Database (Denmark)

    Rokni, Masoud; Scappin, Fabio

    2009-01-01

    Hybrid systems consisting Solid Oxide Fuel Cell (SOFC) on the top of a Steam Turbine (ST) are investigated. The plants are fired by natural gas. A desulfurization reactor removes the sulfur content in the NG while a pre-reformer break down the heavier hydrocarbons. The pre-treated fuel enters the...... is considerably more than the conventional combined cycles (CC). Both ASR (Adiabatic Steam Reformer) and CPO (Catalytic Partial Oxidation) fuel reformer reactors are considered in this study.......Hybrid systems consisting Solid Oxide Fuel Cell (SOFC) on the top of a Steam Turbine (ST) are investigated. The plants are fired by natural gas. A desulfurization reactor removes the sulfur content in the NG while a pre-reformer break down the heavier hydrocarbons. The pre-treated fuel enters...

  2. Gallbladder Cancer in the 21st Century

    Directory of Open Access Journals (Sweden)

    Rani Kanthan

    2015-01-01

    Full Text Available Gallbladder cancer (GBC is an uncommon disease in the majority of the world despite being the most common and aggressive malignancy of the biliary tree. Early diagnosis is essential for improved prognosis; however, indolent and nonspecific clinical presentations with a paucity of pathognomonic/predictive radiological features often preclude accurate identification of GBC at an early stage. As such, GBC remains a highly lethal disease, with only 10% of all patients presenting at a stage amenable to surgical resection. Among this select population, continued improvements in survival during the 21st century are attributable to aggressive radical surgery with improved surgical techniques. This paper reviews the current available literature of the 21st century on PubMed and Medline to provide a detailed summary of the epidemiology and risk factors, pathogenesis, clinical presentation, radiology, pathology, management, and prognosis of GBC.

  3. Danmarks Største Fossiler

    DEFF Research Database (Denmark)

    Lindow, Bent Erik Kramer; Cuny, Gilles Guy Roger

    2008-01-01

    For 8 millioner år siden myldrede Nordsøen af en mangfoldighed af hajer, hvaler, havskildpadder og sæler, mange flere end i dag. Blandt dem finder man Danmarks største fossiler som er udstillet på Museum Sønderjylland - Naturhistorie og Palæontologi i Gram.......For 8 millioner år siden myldrede Nordsøen af en mangfoldighed af hajer, hvaler, havskildpadder og sæler, mange flere end i dag. Blandt dem finder man Danmarks største fossiler som er udstillet på Museum Sønderjylland - Naturhistorie og Palæontologi i Gram....

  4. Baseline risk assessment for exposure to contaminants at the St. Louis Site, St. Louis, Missouri

    Energy Technology Data Exchange (ETDEWEB)

    1993-11-01

    The St. Louis Site comprises three noncontiguous areas in and near St. Louis, Missouri: the St. Louis Downtown Site (SLDS), the St. Louis Airport Storage Site (SLAPS), and the Latty Avenue Properties. The main site of the Latty Avenue Properties includes the Hazelwood Interim Storage Site (HISS) and the Futura Coatings property, which are located at 9200 Latty Avenue. Contamination at the St. Louis Site is the result of uranium processing and disposal activities that took place from the 1940s through the 1970s. Uranium processing took place at the SLDS from 1942 through 1957. From the 1940s through the 1960s, SLAPS was used as a storage area for residues from the manufacturing operations at SLDS. The materials stored at SLAPS were bought by Continental Mining and Milling Company of Chicago, Illinois, in 1966, and moved to the HISS/Futura Coatings property at 9200 Latty Avenue. Vicinity properties became contaminated as a result of transport and movement of the contaminated material among SLDS, SLAPS, and the 9200 Latty Avenue property. This contamination led to the SLAPS, HISS, and Futura Coatings properties being placed on the National Priorities List (NPL) of the US Environmental Protection Agency (EPA). The US Department of Energy (DOE) is responsible for cleanup activities at the St. Louis Site under its Formerly Utilized Sites Remedial Action Program (FUSRAP). The primary goal of FUSRAP is the elimination of potential hazards to human health and the environment at former Manhattan Engineer District/Atomic Energy Commission (MED/AEC) sites so that, to the extent possible, these properties can be released for use without restrictions. To determine and establish cleanup goals for the St. Louis Site, DOE is currently preparing a remedial investigation/feasibility study-environmental impact statement (RI/FS-EIS). This baseline risk assessment (BRA) is a component of the process; it addresses potential risk to human health and the environment associated wi

  5. Pooling strategies for St Petersburg gamblers

    OpenAIRE

    Csörgö, Sandor; Simons, Gordon

    2006-01-01

    Peter offers to play exactly one St Petersburg game with each of [math] players, Paul [math] , [math] , Paul [math] , whose conceivable pooling strategies are described by all possible probability distributions [math] . Comparing infinite expectations, we characterize among all [math] those admissible strategies for which the pooled winnings, each distributed as [math] , yield a finite added value for each and every one of Paul [math] , [math] , Paul [math] in comparison with their individual...

  6. Hjertestop udløst af koronararteriespasme

    DEFF Research Database (Denmark)

    Müllertz, Katrine Mikala; Hansen, Henrik Steen

    2012-01-01

    Coronary arterial vasospasm may be associated with acute myocardial infarction, ventricular tachycardia or fibrillation as well as sudden death. Two case reports describing coronary vasospasm leading to ST-segment elevation and cardiac arrest are presented. Coronary arteriography revealed an occl...... an occlusion that disappeared after injection of nitroglycerine. Both patients were treated with calcium antagonists and a cardioverter defibrillator (ICD) was implanted. One year after the ICD implantation no tachyarrhythmias had been registered....

  7. St. Canute Lavard around the Baltic Sea

    DEFF Research Database (Denmark)

    Petersen, Nils Holger

    2018-01-01

    This chapter discusses the Baltic Sea-area manifestations of the cult of the Danish Royal saint, Canute the Duke, in Danish, Knud Lavard, during the Middle Ages. It also applies theories of cultural memory by Jan and Aleida Assmann in order to approach an understanding of how the cult of St. Canute...... was culturally re-functionalized in Denmark in the sixteenth century, but not in any similar way in other areas around the Baltic Sea....

  8. Carl Størmer Auroral Pioneer

    CERN Document Server

    Egeland, Alv

    2013-01-01

    This biography summarizes the seminal contributions to auroral and space science of Carl Størmer (1874 - 1957). He was the first to develop precise photographic methods to calculate heights and morphologies of diverse auroral forms during four solar cycles. Størmer independently devised numerical techniques to determine the trajectories of high-energy charged particles allowed and forbidden in the Earth’s magnetic field. His theoretical analyses explained cosmic ray access to the upper atmosphere, 20 years before they were identified by other scientists. Størmer’s crowning achievement, “The Polar Aurora,” published when he was 81 years old, stands to this day as a regularly cited guide in graduate-level courses on space physics.   The authors present the life of this prodigious scientist in relation to the cultural life of early 20th century in Norway and to the development of the space sciences in the post-Sputnik era.

  9. Sediment Characterization in St. Alban's Bay, VT

    Science.gov (United States)

    Nethercutt, S.; Manley, T.; Manley, P.

    2017-12-01

    St. Alban's Bay within Lake Champlain is plagued with harmful algal blooms. With future intensification due to climate change, a multidisciplinary program (BREE-Basin Resilience to Extreme Events) was initiated in 2016. In order to assess the mobilization of harmful nutrients from sediment resuspension events and riverine input, 74 sediment samples were collected in a grid fashion throughout St. Alban's Bay. Sediments were deflocculated and analyzed using a LA920 Horiba laser scattering particle size distribution analyzer to define the frequency of sediment sizes from clay to sand. Gridded surfaces of mean sortable silt percentage, silt percentage, sand percentage, and clay percentage were used to represent the sediment distribution of the region. A plot of diameter versus frequency showed the bimodal nature of some of the sediments, with one peak at about 10 microns diameter (silt) and the second at about 525 microns diameter (sand). The data showed an extremely low percentage of clay relative to that of sand and silt. The highest frequencies of sortable silt, which represents the most easily mobilized particle size, are found in the deepest areas of the bay, suggesting that these regions are where dominant bottom flow occurs. The high occurrence of sortable silt in the St. Alban's Bay does suggest that sediment mobilization, and therefore nutrient mobilization has the potential to occur. These data combined with high-resolution multibeam and hydrodynamic data will allow for future models of water flow and remobilization studies in the future.

  10. High energy astrophysics 21st century workshop 'Space Capabilities in the 21st Century'. [NASA programs

    Science.gov (United States)

    Rhome, Robert C.

    1990-01-01

    An overview of 20th-century NASA accomplishments and of the infrastructure and technology that NASA plans to have in place in the 21st century is presented. Attention is given to the Great Observatories Program, AXAF, the Space Infrared Telescope Facility, the Cosmic Background Explorer, the Small Explorers Program, the Large Area Modular Array of Reflectors, and the X-Ray Background Survey Spectrometer. Also discussed are earth-to-orbit communication links, transportation in the 1990s, the evolution of the space infrastructure, and the Space Station Freedom. Consideration is given to the possibilities of the 21st-century infrastructure, with emphasis on exploration on Mars and the moon. Topics addressed include telecommunications, navigation, information management, and 21st-century space science.

  11. Managing Reliability in the 21st Century

    Energy Technology Data Exchange (ETDEWEB)

    Dellin, T.A.

    1998-11-23

    The rapid pace of change at Ike end of the 20th Century should continue unabated well into the 21st Century. The driver will be the marketplace imperative of "faster, better, cheaper." This imperative has already stimulated a revolution-in-engineering in design and manufacturing. In contrast, to date, reliability engineering has not undergone a similar level of change. It is critical that we implement a corresponding revolution-in-reliability-engineering as we enter the new millennium. If we are still using 20th Century reliability approaches in the 21st Century, then reliability issues will be the limiting factor in faster, better, and cheaper. At the heart of this reliability revolution will be a science-based approach to reliability engineering. Science-based reliability will enable building-in reliability, application-specific products, virtual qualification, and predictive maintenance. The purpose of this paper is to stimulate a dialogue on the future of reliability engineering. We will try to gaze into the crystal ball and predict some key issues that will drive reliability programs in the new millennium. In the 21st Century, we will demand more of our reliability programs. We will need the ability to make accurate reliability predictions that will enable optimizing cost, performance and time-to-market to meet the needs of every market segment. We will require that all of these new capabilities be in place prior to the stint of a product development cycle. The management of reliability programs will be driven by quantifiable metrics of value added to the organization business objectives.

  12. ST-elevations-myokardieinfarkt efter terapeutisk adrenalininjektion

    DEFF Research Database (Denmark)

    Rømhild Davidsen, Jesper; Lambrechtsen, Jess; Egstrup, Kenneth

    2006-01-01

    A case of acute myocardial infarction (AMI) following accidental iatrogenic overdose by adrenaline injection is described in a male aged 55 years. This patient was given 1 mg of adrenaline due to anaphylactic symptoms. Afterwards he presented with angina pectoris, dyspnoea and ST-segment elevation...... in the ECG. Plasma TnT and CK-MB were raised. A coronary angiography revealed a 66% stenosis of RCA. This patient had an asymptomatic RCA stenosis that probably became symptomatic due to coronary artery spasm related to adrenaline injection and thereby presented symptoms and signs of AMI....

  13. Water resources of St. Charles Parish, Louisiana

    Science.gov (United States)

    White, Vincent E.; Prakken, Lawrence B.

    2015-01-01

    Information concerning the availability, use, and quality of water in St. Charles Parish, Louisiana, is critical for proper water-supply management. The purpose of this fact sheet is to present information that can be used by water managers, parish residents, and others for stewardship of this vital resource. Information on the availability, past and current use, use trends, and water quality from groundwater and surface-water sources in the parish is presented. Previously published reports and data stored in the U.S. Geological Survey’s National Water Information System (http://waterdata.usgs.gov/nwis) are the primary sources of the information presented here.

  14. Water resources of St. James Parish, Louisiana

    Science.gov (United States)

    White, Vincent E.; Prakken, Lawrence B.

    2015-01-01

    Information concerning the availability, use, and quality of water in St. James Parish, Louisiana, is critical for proper water-supply management. The purpose of this fact sheet is to present information that can be used by water managers, parish residents, and others for stewardship of this vital resource. Information on the availability, past and current use, use trends, and water quality from groundwater and surface-water sources in the parish is presented. Previously published reports and data stored in the U.S. Geological Survey’s National Water Information System (http://waterdata.usgs.gov/nwis) are the primary sources of the information presented here.

  15. 31st IMAC Conference on Structural Dynamics

    CERN Document Server

    Adams, Douglas; Carrella, Alex; Mayes, Randy; Rixen, Daniel; Allen, Matt; Cunha, Alvaro; Catbas, Fikret; Pakzad, Shamim; Racic, Vitomir; Pavic, Aleksandar; Reynolds, Paul; Simmermacher, Todd; Cogan, Scott; Moaveni, Babak; Papadimitriou, Costas; Allemang, Randall; Clerck, James; Niezrecki, Christopher; Wicks, Alfred

    2013-01-01

    Topics in Nonlinear Dynamics, Volume 1: Proceedings of the 31st IMAC, A Conference and Exposition on Structural Dynamics, 2013, the first volume of seven from the Conference, brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Structural Dynamics, including papers on:   Nonlinear Oscillations Nonlinearities In Practice Nonlinear System Identification: Methods Nonlinear System Identification: Friction & Contact Nonlinear Modal Analysis Nonlinear Modeling & Simulation Nonlinear Vibration Absorbers Constructive Utilization of Nonlinearity.

  16. Nuclear regulatory legislation, 101st Congress

    International Nuclear Information System (INIS)

    1991-06-01

    This document is a compilation of nuclear regulatory legislation and other relevant material through the 101st Congress, 2nd Session. This compilation has been prepared for use as a resource document, which the NRC intends to update at the end of every Congress. The contents of NUREG-0980 include The Atomic Energy Act of 1954, as amended: Energy Reorganization Act of 1974, as amended; Uranium Mill Tailings Radiation Control Act of 1978; Low-Level Radioactive Waste Policy Act; Nuclear Waste Policy Act of 1982; and NRC Authorization and Appropriations Acts. Other materials included are statues and treaties on export licensing, nuclear non-proliferation, and environmental protection

  17. Health Physics in the 21st Century

    CERN Document Server

    Bevelacqua, Joseph John

    2008-01-01

    Adopting a proactive approach and focusing on emerging radiation-generating technologies, Health Physics in the 21st Century meets the growing need for a presentation of the relevant radiological characteristics and hazards. As such, this monograph discusses those technologies that will affect the health physics and radiation protection profession over the decades to come. After an introductory overview, the second part of this book looks at fission and fusion energy, followed by a section devoted to accelerators, while the final main section deals with radiation on manned space missions.

  18. 21st Century South African Science Fiction

    Directory of Open Access Journals (Sweden)

    CARAIVAN LUIZA

    2014-12-01

    Full Text Available The paper analyses some aspects of South African science fiction, starting with its beginnings in the 1920s and focusing on some 21st century writings. Thus Lauren Beukes’ novels Moxyland (2008 and Zoo City (2010 are taken into consideration in order to present new trends in South African literature and the way science fiction has been marked by Apartheid. The second South African science fiction writer whose writings are examined is Henrietta Rose-Innes (with her novel Nineveh, published in 2011 as this consolidates women's presence in the SF world.

  19. Principal Component Surface (2011) for St. Thomas East End Reserve, St. Thomas

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a 0.3x0.3 meter principal component analysis (PCA) surface for areas the St. Thomas East End Reserve (STEER) in the U.S. Virgin Islands (USVI)....

  20. ST Implications in the CNGS Project

    CERN Document Server

    Wilhelmsson, M

    2000-01-01

    The CNGS project concerns the construction of a neutrino beam facility (CNGS = CERN Neutrino beam to Gran Sasso). A 450 GeV proton beam will be extracted from the SPS accelerator. This proton beam will hit a target a few hundred metres downstream from the extraction point (BA4). In the debris of the proton beam we will find pions which continue down a 1000 m, evacuated tunnel and a fraction of which decay into a neutrino beam. After this decay tunnel (1.1 km), a 'hadron stop' will separate the neutrinos, after which they will resume their journey down to a detector pit, outside Rome (Gran Sasso). The CERN facility has a total length of approximately 3 km. The ST division has an important share in the construction work, both of the above-mentioned tunnels as well as of all other infrastructure services, and this work concerns most of the groups in the division. This report will outline the technical design of the facility and explain how we, in the ST division, are involved in the project. The CERN council app...

  1. Deposition in St. Mark's Basilica of Venice.

    Science.gov (United States)

    Morabito, E; Zendri, E; Piazza, R; Ganzerla, R; Montalbani, S; Marcoleoni, E; Bonetto, F; Scandella, A; Barbante, C; Gambaro, A

    2013-04-01

    Atmospheric pollutants may cause damage to monuments and historical buildings. Besides air contaminants, soluble salts are also responsible for stone deterioration and decay in outdoor and indoor monuments. The problem of how to conserve works of arts thus requires a deep knowledge of contaminants' concentration and distribution inside buildings. In this work, water-soluble ions inside St. Mark's Basilica in Venice were studied, with the aim of understanding their principal source and distribution inside the building. With the aid of Fourier transform infrared spectroscopy and scanning electron microscopy analysis, the interaction between ions and surface's material was also investigated. Ion chromatographic analysis of depositions highlighted a large amount of "deteriorating agents" such as sulphates and chlorides. A possible source in the innermost area of the basilica has been found for formates and nitrates. On the contrary, a decrease of chloride, from the entrance to the innermost area, has been found, which indicates that the source is outside the building. It is emphasized that different contaminants behave differently on different material, and the effect of pollution inside churches and monuments is not easy to predict. Wood and brick seem to react differently than stone and mortar to the damaging action of salts and pollutants. The present work should be considered a useful tool for the future preservation of St. Mark's Basilica in Venice.

  2. Federal laboratories for the 21st century

    Energy Technology Data Exchange (ETDEWEB)

    Gover, J. [Sandia National Labs., Albuquerque, NM (United States); Huray, P.G. [Univ. of South Carolina, Columbia, SC (United States)

    1998-04-01

    Federal laboratories have successfully filled many roles for the public; however, as the 21st Century nears it is time to rethink and reevaluate how Federal laboratories can better support the public and identify new roles for this class of publicly-owned institutions. The productivity of the Federal laboratory system can be increased by making use of public outcome metrics, by benchmarking laboratories, by deploying innovative new governance models, by partnerships of Federal laboratories with universities and companies, and by accelerating the transition of federal laboratories and the agencies that own them into learning organizations. The authors must learn how government-owned laboratories in other countries serve their public. Taiwan`s government laboratory, Industrial Technology Research Institute, has been particularly successful in promoting economic growth. It is time to stop operating Federal laboratories as monopoly institutions; therefore, competition between Federal laboratories must be promoted. Additionally, Federal laboratories capable of addressing emerging 21st century public problems must be identified and given the challenge of serving the public in innovative new ways. Increased investment in case studies of particular programs at Federal laboratories and research on the public utility of a system of Federal laboratories could lead to increased productivity of laboratories. Elimination of risk-averse Federal laboratory and agency bureaucracies would also have dramatic impact on the productivity of the Federal laboratory system. Appropriately used, the US Federal laboratory system offers the US an innovative advantage over other nations.

  3. Organisation des travaux ST-CV

    CERN Document Server

    Martel, C; CERN. Geneva. ST Division

    2003-01-01

    Débutée il y a deux ans, la phase de construction des installations de refroidissement du LHC a atteint en 2003 son apogée. De nombreux autres projets sont également gérés par le groupe dans divers secteurs du laboratoire. La spécificité du groupe est de réaliser des installations complexes impliquant des spécificités diverses telles qu’aéraulique, hydraulique, électrique, etc. Pour faire face à ces demandes la section travaux du groupe ST CV a adopté une structure capable de réaliser ces divers projets avec un minimum de personnel. La première partie de ce document décrit l’organisation de la section travaux ST CV. Dans une deuxième partie, les auteurs dressent un état des lieux des chantiers par projet en décrivant plus particulièrement les activités dans les domaines du traitement d’air et de refroidissement par eau.

  4. Status of the Fort St. Vrain decommissioning

    International Nuclear Information System (INIS)

    Fisher, M.J.

    1990-01-01

    Fort St. Vrain is a high temperature gas cooled reactor. It has been shut down as a result of financial and technical difficulties. Fort St. Vrain has been planning for defueling and decommissioning for at least three years. The preliminary decommissioning plan, in accordance with the NRC's final rule, has been submitted and is being reviewed by the NRC. The basis of the preliminary decommissioning plan has been SAFSTOR. Public Service Company, who is the owner and operator of FSV, is scheduled to submit a proposed decommissioning plan to the NRC in the fourth quarter of 1990. PSC has gone out for bid on the decontamination and dismantlement of FSV. This paper includes the defueling schedule, the independent spent fuel storage installation status, the probability of shipping fuel to DOE, the status of the preliminary decommissioning plan submittal, the issuance of a possession only license and what are the results of obtaining this license amendment, preliminary decommissioning activities allowed prior to the approval of a proposed decommissioning plan, the preparation of a proposed decommissioning plan and the status of our decision to proceed with SAFSTOR or DECON as identified in the NRC's final decommissioning rule

  5. 1st Roman Young Researchers Meeting Proceedings

    CERN Document Server

    Cannuccia, E; Pietrobon, D; Stellato, F; Veneziani, M

    2009-01-01

    During the last few decades scientists have been able to test the bases of the physics paradigms, where the quantum mechanics has to match the cosmological scales. Between the extremes of this scenario, biological phenomena and their complexity take place, challenging the laws we observe in the atomic and sub-atomic world. In order to explore the details of this world, new huge experimental facilities are under construction. These projects involve people coming from several countries and give physicists the opportunity to work together with chemists, biologists and other scientists. The Roman Young Researchers Meeting is a conference, organised by Ph. D. students and young postdocs connected to the Roman area. It is aimed primarily at graduate students and post-docs, working in physics. The 1st conference has been held on the 21st of July 2009 at the University of Roma Tor Vergata. It was organised in three sessions, devoted to Astrophysics and Cosmology, Soft and Condensed Matter Physics and Theoretical and ...

  6. Chicago-St. Louis high speed rail plan

    Energy Technology Data Exchange (ETDEWEB)

    Stead, M.E.

    1994-12-31

    The Illinois Department of Transportation (IDOT), in cooperation with Amtrak, undertook the Chicago-St. Louis High Speed Rail Financial and Implementation Plan study in order to develop a realistic and achievable blueprint for implementation of high speed rail in the Chicago-St. Louis corridor. This report presents a summary of the Price Waterhouse Project Team`s analysis and the Financial and Implementation Plan for implementing high speed rail service in the Chicago-St. Louis corridor.

  7. Frauen mit Eßstörungen im Ausdauersport

    OpenAIRE

    Bös, Annette

    2003-01-01

    Die vorliegende Arbeit untersucht das Phänomen Eßstörungen bei Ausdauersportlerinnen. Auf dem Hintergrund des identitätstheoretischen Ansatzes von Stahr et al. (1995) geht es um die Frage nach den Hauptverursachungsmomenten der Eßstörungen von sieben jungen Sportlerinnen. Im Rahmen einer qualitativen Sozialforschungsarbeit wurden sieben Athletinnen in einem problemzentrierten Interview zur Phase ihrer Eßstörungserkrankung befragt. Die Arbeit setzt sich zum Ziel, einen Beitrag zur systematisch...

  8. Electrocardiogram ST-Segment Morphology Delineation Method Using Orthogonal Transformations.

    Directory of Open Access Journals (Sweden)

    Miha Amon

    Full Text Available Differentiation between ischaemic and non-ischaemic transient ST segment events of long term ambulatory electrocardiograms is a persisting weakness in present ischaemia detection systems. Traditional ST segment level measuring is not a sufficiently precise technique due to the single point of measurement and severe noise which is often present. We developed a robust noise resistant orthogonal-transformation based delineation method, which allows tracing the shape of transient ST segment morphology changes from the entire ST segment in terms of diagnostic and morphologic feature-vector time series, and also allows further analysis. For these purposes, we developed a new Legendre Polynomials based Transformation (LPT of ST segment. Its basis functions have similar shapes to typical transient changes of ST segment morphology categories during myocardial ischaemia (level, slope and scooping, thus providing direct insight into the types of time domain morphology changes through the LPT feature-vector space. We also generated new Karhunen and Lo ève Transformation (KLT ST segment basis functions using a robust covariance matrix constructed from the ST segment pattern vectors derived from the Long Term ST Database (LTST DB. As for the delineation of significant transient ischaemic and non-ischaemic ST segment episodes, we present a study on the representation of transient ST segment morphology categories, and an evaluation study on the classification power of the KLT- and LPT-based feature vectors to classify between ischaemic and non-ischaemic ST segment episodes of the LTST DB. Classification accuracy using the KLT and LPT feature vectors was 90% and 82%, respectively, when using the k-Nearest Neighbors (k = 3 classifier and 10-fold cross-validation. New sets of feature-vector time series for both transformations were derived for the records of the LTST DB which is freely available on the PhysioNet website and were contributed to the LTST DB. The

  9. Nuclear Power in the 21st Century

    International Nuclear Information System (INIS)

    Amano, Yukiya

    2013-01-01

    The International Atomic Energy Agency helps its Member States to use nuclear technology for a broad range of peaceful purposes, one of the most important of which is generating electricity. The accident at the Fukushima Daiichi nuclear power plant in Japan in March 2011 caused anxiety about nuclear safety throughout the world and raised questions about the future of nuclear power. Two years on, it is clear that the use of nuclear power will continue to grow in the coming decades, although growth will be slower than was anticipated before the accident. Many countries with existing nuclear power programmes plan to expand them. Many new countries, both developed and developing, plan to introduce nuclear power. The factors contributing to this growing interest include increasing global demand for energy, as well as concerns about climate change, volatile fossil fuel prices, and security of energy supply. It will be difficult for the world to achieve the twin goals of ensuring sustainable energy supplies and curbing greenhouse gases without nuclear power. The IAEA helps countries that opt for nuclear power to use it safely and securely. Countries that have decided to phase out nuclear power will have to deal with issues such as plant decommissioning, remediation, and waste management for decades to come. The IAEA also assists in these areas. I am grateful to the Russian Federation for hosting the 2013 International Ministerial Conference on Nuclear Power in the 21st Century in St Petersburg in June. This timely conference provides a valuable opportunity to take stock of nuclear power in the wake of the Fukushima Daiichi accident. A high level of public confidence in the safety of nuclear power is essential for the future of the sector. Much valuable work has been done in the past two years to improve safety. But much remains to be done. It is vitally important that the momentum is maintained and that everything is done to ensure that nuclear power is as safe as humanly

  10. VIA større employability

    DEFF Research Database (Denmark)

    Andersen, Henrik Mariendal

    2017-01-01

    At studerende udvikler employability under studiet er et centralt indsatsområde for uddannelsesinstitutionerne. Fokus herpå har aldrig været større. Dette projekt ser nærmere på VIA-dimittenders personlige oplevelse og erfaring med ”deres employability” under studiet og hvordan den sættes i spil...... efterfølgende på arbejdsmarkedet. Formålet er at finde muligheder til at forbedre tilbud om employability-skabende processer og aktiviteter og tilpasse disse processer og aktiviteter til konkrete behov. På baggrund af en række kvalitative interviews og personlighedstest af deltagerne foreslås en styrket...... personlig tilgang i arbejdet med employability, der samtidig sikrer en bred vifte af tilbud, som tilgodeser differentierede personlige og faglige tilgange til at udvikle employability....

  11. 1st Applied Electromagnetic International Conference

    CERN Document Server

    Othman, Mohd; Aziz, Mohamad; Malek, Mohd

    2015-01-01

    In this book, experts from academia and industry present the latest advances in scientific theory relating to applied electromagnetics and examine current and emerging applications particularly within the fields of electronics, communications, and computer technology. The book is based on presentations delivered at APPEIC 2014, the 1st Applied Electromagnetic International Conference, held in Bandung, Indonesia in December 2014. The conference provided an ideal platform for researchers and specialists to deliver both theoretically and practically oriented contributions on a wide range of topics relevant to the theme of nurturing applied electromagnetics for human technology. Many novel aspects were addressed, and the contributions selected for this book highlight the relevance of advances in applied electromagnetics to a variety of industrial engineering problems and identify exciting future directions for research.

  12. IAEA safeguards for the 21st century

    International Nuclear Information System (INIS)

    1999-01-01

    The publication includes the lectures held during the seminar on IAEA safeguards for the 21st century. The topics covered are as follows: the nuclear non-proliferation regime; Legal instruments related to the application of safeguards; multilateral nuclear export controls; physical protection and its role in nuclear non-proliferation; the evolution of safeguards; basis for the strengthening of safeguards; information required from states, including 'small quantities protocol'; processing and evaluation of new information for strengthened safeguards; additional physical access and new technologies for strengthened safeguards; equipping the IAEA Inspectorate with new skills; achievements to date the strengthened safeguards; complement of regional non-proliferation arrangements in international nuclear verification; promotion of transparency through Korean experience; and the future prospects of safeguards

  13. The St. Petersburg paradox: An experimental solution

    Science.gov (United States)

    Da Silva, Sergio; Matsushita, Raul

    2016-03-01

    The St. Petersburg paradox refers to a gamble of infinite expected value, where people are likely to spend only a small entrance fee for it. There is a huge volume of literature that mostly concentrates on the psychophysics of the game; experiments are scant. Here, rather than focusing on the psychophysics, we offer an experimental, "physical" solution as if robots played the game. After examining the time series formed by one billion plays, we: confirm that there is no characteristic scale for this game; explicitly formulate the implied power law; and identify the type of α-stable distribution associated with the game. We find an α = 1 and, thus, the underlying distribution of the game is a Cauchy flight, as hinted by Paul Samuelson.

  14. Effective Leadership in the 21st Century.

    Science.gov (United States)

    Jones, Jacqueline

    2015-01-01

    Leaders know how to achieve goals and inspire people along the way. While the terms and definitions may change with the times, it is important to understand the skills and abilities needed to lead in the 21st century. Most effective leaders have one element in common, and that is they are able to keep their teams engaged. If team members are not engaged, they may very well leave the organization. With four generations in the workplace, leaders must adapt and modify their leadership style in order to maintain employee engagement. The ability to lead effectively is based on a number of skills, including communication, motivation, vision, modeling, demonstrating empathy, confidence, persistence, and integrity.

  15. Motivating Students in the 21st Century.

    Science.gov (United States)

    Sedden, Mandy L; Clark, Kevin R

    2016-07-01

    To examine instructors' and students' perspectives on motivation in the classroom and clinical environments and to explore instructional strategies educators can use to motivate college students in the 21st century. Articles selected for this review were from peer-reviewed journals and scholarly sources that emphasized student and educator perspectives on motivation and instructional strategies to increase student motivation. Understanding how college students are motivated can help educators engage students in lessons and activities, ultimately improving the students' academic performance. Students exhibit increased motivation in classes when educators have high expectations, conduct an open-atmosphere classroom, and use multidimensional teaching strategies. Instructional styles such as connecting with students, creating an interactive classroom, and guiding and reminding students improved student motivation. Radiologic science educators must be mindful of how college students are motivated and use various instructional strategies to increase students' motivation in the classroom and clinical setting. ©2016 American Society of Radiologic Technologists.

  16. Digital Humanities in the 21st Century

    DEFF Research Database (Denmark)

    Brügger, Niels

    2016-01-01

    In this article it is argued that one of the major transformative factors of the humanities at the beginning of the 21st century is the shift from analogue to digital source material, and that this shift will affect the humanities in a variety of ways. But various kinds of digital material...... are not digital in the same way, which a distinction between digitized, born-digital, and reborn-digital may help us acknowledge, thereby helping us to understand how each of these types of digital material affects different phases of scholarly work in its own way. This is illustrated by a detailed comparison...... of the nature of digitized collections and web archives....

  17. GOSPEL OF ST. JOHN, CHAPTER 21

    Directory of Open Access Journals (Sweden)

    A. PROKOPTCHUK

    2006-01-01

    Full Text Available The purpose of this report is to show that chapter 21 of Jn is inseparably linked withall previous material of the fourth Gospel. These links are more than sufficient. The sup-position that this chapter was not in the original text has become long established, how-ever there has not existed any objective evidence for this fact. Critique has always had away of raising itself above the Scripture. In the author’s opinion a researcher’s role isrelated to that of St. John. Each of us becomes an eyewitness of the things seen and per-ceived. We should not rise above the text, but keep at the same level with it in order tohave a deep insight into author’s enigma, Christ’s enigma and get it across to our hear-ers

  18. Fort St. Vrain defueling ampersand decommissioning considerations

    International Nuclear Information System (INIS)

    Warembourg, D.

    1994-01-01

    Fort St. Vrain Nuclear Generating Station (FSV) is one of the first commercial reactors to be decommissioned under NRC's decommissioning rule. The defueling and decommissioning of this 330 MWe High Temperature Gas Cooled Reactor (HTGR) has involved many challenges for Public Service Company of Colorado (PSC) including defueling to an Independent Spent Fuel Storage Installation (ISFSI), establishing decommissioning funding, obtaining regulatory approvals, arranging for waste disposal, and managing a large fixed price decommissioning contract. In 1990, a team comprised of the Westinghouse Corporation and Morrison Knudsen Corporation, with the Scientific Ecology Group as a major subcontractor, was contracted by PSC to perform the decommissioning under a fixed price contract. Physical work activities began in August 1992. Currently, physical dismantlement activities are about 45% complete, the project is on schedule, and is within budget

  19. Ambulatory ST segment monitoring after myocardial infarction

    DEFF Research Database (Denmark)

    Mickley, H

    1994-01-01

    The prevalence of transient myocardial ischaemia after myocardial infarction seems to be lower than in other subgroups with coronary artery disease. In postinfarction patients, however, a greater proportion of ischaemic episodes are silent. At present there is substantial evidence that transient...... as important reasons for the inconsistent findings. The precise role of ambulatory ST segment monitoring in clinical practice has yet to be established. Direct comparisons with exercise stress testing may not be appropriate for two reasons. Firstly, the main advantage of ambulatory monitoring may...... be that it can be performed early after infarction at the time of maximum risk. Secondly, it can be performed in most patients after infarction, including those recognised as being at high risk who are unable to perform an exercise stress test....

  20. Operational experience at Fort St. Vrain

    International Nuclear Information System (INIS)

    Bramblett, G.C.; Fisher, C.R.; Swart, F.E.

    1981-01-01

    The Fort St. Vrain (FSV) station, a 330-MW(e) single reheat steam cycle powered by a high-temperature gas-cooled reactor (HTGR), is the first HTGR to enter commercial operation. Designed and built by General Atomic Company (GA), the plant is owned and operated by Public Service Company of Colorado (PSC). Many unique design features have been incorporated into this reactor system, including high-pressure helium as the primary system coolant, a graphite-moderated prismatic block core design, fission-product-containing carbide coatings on both fissile and fertile fuel particles, steam-driven helium circulators turning on water bearings, and once-through steam generators. All of these systems are contained in a prestressed concrete reactor vessel (PCRV). Extensive testing has been conducted during the rise to power following first criticality early in 1974 to verify system design performance. During this period, the plant has operated at power levels up to 70% and produced over one billion kilowatt hours of electricity. In 1979, the first refueling was conducted in conjunction with an extensive in-core inspection, the addition of in-core instrumentation, and a planned removal of a circulator for inspection. Later in the year, a scheduled shutdown was undertaken for surveillance tests, insertion of core region constraint devices (RCDs), and other maintenance. Fort St. Vrain has encountered problems of the type that would be expected in a first-of-a-kind system. The plant is currently restricted to 70% of design power by the Nuclear Regulatory Commission (NRC) pending resolution of the core region gas outlet temperature fluctuation problem. Even so, the basic performance of the HTGR concept and all of the unique design features have been successfully demonstrated. The system has been characterized by low personnel radiation exposures, operational flexibility, and long time afforded for status evaluation and response. (author)

  1. Stål er den største trussel

    DEFF Research Database (Denmark)

    Damsgaard Hansen, Niels; Krogh, Paul Henning

    2014-01-01

    Regnorme er fremtidens svar på stålet. De kan nemlig bearbejde jorden 2417 - det vil sige døgnet rundt. De er ikke så krævende, holder ikke faglige møder, bryder ikke ned og ser stort på pauserne. Men selvfølgelig er der forhold, de slet ikke bryder sig om.......Regnorme er fremtidens svar på stålet. De kan nemlig bearbejde jorden 2417 - det vil sige døgnet rundt. De er ikke så krævende, holder ikke faglige møder, bryder ikke ned og ser stort på pauserne. Men selvfølgelig er der forhold, de slet ikke bryder sig om....

  2. 21st Century leadership skills for learning networks

    NARCIS (Netherlands)

    Basten, Floor; Evers, Arnoud; Geijsel, Femke; Vermeulen, Marjan

    2018-01-01

    Ultimate goal: to prepare pupils for a life in a society that requires 21st century skills and actions Immediate focus: teachers and principals develop 21st century skills in the practice of their work → together with researchers principals co-create tools to support teacher learning.

  3. Kalkgraslandvegetaties van de St. Pietersberg ten zuiden van Maastricht

    NARCIS (Netherlands)

    Willems, J.H.; Blanckenborg, F.G.

    1975-01-01

    In this publication the authors describe the grassland communities rich in species especially those which occur on basic soils. The investigation was done in the Belgian part as well as in the Dutch part of St. Pietersberg situated south of the Dutch town of Maastricht. See map – fig. 1. St.

  4. Flora of St Katherine Protectorate: key to families and genera ...

    African Journals Online (AJOL)

    An illustrated key to families and genera of the flora of the St Katherine Protectorate is provided to facilitate the identification of the unique flora of the area, based on five years of collecting mainly in the mountains and wadis surrounding the town of St Katherine. The key includes 43 families and 141 genera, the families ...

  5. Orthophoto Mosaic (2012) of the St. Thomas East End Reserve

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This 0.3x0.3 meter imagery mosaic of the St. Thomas East End Reserve (STEER), St. Thomas in the U.S. Virgin Islands was created by the National Oceanic and...

  6. Bathymetry (2011) of the St. Thomas East End Reserve

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a LiDAR (Light Detection & Ranging) 0.3x0.3 meter resolution depth surface for the St. Thomas East End Reserve (STEER), St. Thomas in the...

  7. Escherichia coli ST131, an Intriguing Clonal Group

    Science.gov (United States)

    Bertrand, Xavier; Madec, Jean-Yves

    2014-01-01

    SUMMARY In 2008, a previously unknown Escherichia coli clonal group, sequence type 131 (ST131), was identified on three continents. Today, ST131 is the predominant E. coli lineage among extraintestinal pathogenic E. coli (ExPEC) isolates worldwide. Retrospective studies have suggested that it may originally have risen to prominence as early as 2003. Unlike other classical group B2 ExPEC isolates, ST131 isolates are commonly reported to produce extended-spectrum β-lactamases, such as CTX-M-15, and almost all are resistant to fluoroquinolones. Moreover, ST131 E. coli isolates are considered to be truly pathogenic, due to the spectrum of infections they cause in both community and hospital settings and the large number of virulence-associated genes they contain. ST131 isolates therefore seem to contradict the widely held view that high levels of antimicrobial resistance are necessarily associated with a fitness cost leading to a decrease in pathogenesis. Six years after the first description of E. coli ST131, this review outlines the principal traits of ST131 clonal group isolates, based on the growing body of published data, and highlights what is currently known and what we need to find out to provide public health authorities with better information to help combat ST131. PMID:24982321

  8. Aligning Business and Education: 21st Century Skill Preparation

    Science.gov (United States)

    Campbell, Charles L., Jr.; Kresyman, Shelley

    2015-01-01

    The purpose of this paper is to explore stakeholder perceptions concerning four key 21st century skills required for graduates to be successful in today's workplace, and to report on common themes surrounding how a post-secondary school in the Southwest United States is preparing graduates with predominant 21st Century skills: interpersonal…

  9. A Hierarchy of 21st Birthday Drinking Norms

    Science.gov (United States)

    Patrick, Megan E.; Neighbors, Clayton; Lee, Christine M.

    2012-01-01

    The present paper offers preliminary evidence for a hierarchical organization of normative social influences on 21st birthday drinking. In recent years, 21st birthday celebratory drinking has received increasing attention, due largely to the propagation of dangerous and sometimes fatal drinking traditions, such as attempting to drink one shot for…

  10. Postcolonial Identity Politics, Language and the Schools in St. Lucia

    Science.gov (United States)

    St. Hilaire, Aonghas

    2009-01-01

    In the postcolonial era, a cultural nationalist movement has sought to elevate the status of St. Lucia's creole vernacular, Kweyol, and with some success--it is now the most visible symbol of St. Lucian national identity. This relatively new development has altered somewhat the historic linguistic status quo between the official, high status…

  11. Rebuilding the LMS for the 21st Century

    Science.gov (United States)

    Demski, Jennifer

    2012-01-01

    Finally--12 years into the 21st century--higher ed classrooms are turning into incubators for the kind of learning environment that curriculum and instructional technology experts have advocated for years. Yet a key question remains: Can legacy learning management systems (LMSs) be dragged into the 21st century as part of this new educational…

  12. Preparing Students for the Future--21st Century Skills

    Science.gov (United States)

    Velez, Alejandra

    2012-01-01

    The 21st century economy is driven by information and communication technologies (ICT). This change has made innovation, manufacturing and production of products and services, rather than manufacturing of material goods, the driving force of economies of leading countries (Wagner, 2008). Due to this shift, today's 21st century society and…

  13. Regional Sediment Management Strategies for the Vicinity of St. Augustine Inlet, St. Johns County, Florida

    Science.gov (United States)

    2016-07-01

    vegetated and provide nesting bird habitat. Beach driving is permitted in this area, and many visitors and residents access the Point for recreation...groin and partly within the footprint of the inlet entrance channel. However, during the 2012 renourishment event, the Point was dredged under the St...outside of the channel footprint to be dredged and returned to the littoral system. ERDC/CHL TR-16-12 16 Work to dredge the shoal would have

  14. The First Outbreak Caused by Acinetobacter baumannii ST208 and ST195 in China

    Directory of Open Access Journals (Sweden)

    Junyan Qu

    2016-01-01

    Full Text Available This study aimed to analyze the clinical characteristics of patients and molecular mechanisms of the first outbreak mainly caused by sequence types (STs 208 multidrug resistant (MDR Acinetobacter baumannii in China. A total of 10 clinical samples were collected from 5 patients who were involved in the outbreak. Bacterial identification and antibiotic sensitivity tests were performed by the VITEK-2 COMPACT automated system. MICs of tigecycline for clinical isolates were determined using broth microdilution. The clonal relatedness of A. baumannii clinical isolates in our local settings was determinated by pulsed-field gel electrophoresis (PFGE and multilocus sequence typing (MLST. A total of 7 A. baumannii strains were isolated and all were MDR strains; two of them were carbapenem-nonsusceptible strains. blaOXA-23 was the only acquired carbapenemase gene in the isolates. The isolates belonged to a single clonal pulsotype determined by PFGE and two sequences types (STs determined by MLST. The isolates belonged to the globally disseminated clonal complex 92, among which ST195 and ST208 were the most common sequence types (71.43% and 28.57%. The outbreak was successfully controlled by stringent infection control measures, especially improving the hand hygiene compliance and enhancing antimicrobial stewardship. In conclusion, this is the first description of an outbreak caused mainly by A. baumannii of ST208 in China. Infection control measures should be strengthened when infection outbreaks in hospital.

  15. St. Louis Airport site environmental report for calendar year 1989, St. Louis, Missouri

    Energy Technology Data Exchange (ETDEWEB)

    none,

    1990-05-01

    The environmental monitoring program, which began in 1984, continued during 1989 at the St. Louis Airport Site (SLAPS) in St. Louis County, Missouri. SLAPS and its vicinity properties, including ditches north and south of the site, were designated for cleanup as part of the Formerly Utilized Sites Remedial Action Program (FUSRAP), a United States Department of Energy (DOE) program to identify and decontaminate or otherwise control sites where residual radioactive material remains from the early years of the nation's atomic energy program. The monitoring program at SLAPS measures radon concentrations in air; external gamma dose rates; and uranium, thorium, and radium concentrations in surface water, groundwater, and sediment. Additionally, several nonradiological parameters are measured in groundwater. To assess the potential effect of SLAPS on public health, the potential radiation dose was estimated for a hypothetical maximally exposed individual. This report presents the findings of the environmental monitoring program conducted at the St. Louis Airport Site (SLAPS) during calendar year 1989. 19 refs., 13 figs., 14 tabs.

  16. ST2 IN REJECTION OF THE TRANSPLANTED HEART

    Directory of Open Access Journals (Sweden)

    O. P. Shevchenko

    2015-01-01

    Full Text Available This review summarizes the current literature devoted to the analysis of prognostic role of ST2 biomarker in rejection of the transplanted heart. ST2 is one of the most promising diagnostic markers of the development and severity of heart failure as well as the mortality risk in patients with cardiovascular diseases. ST2 is expressed in cardiomyocytes in response to a variety of pathological processes and mechanical damage to the heart, which allows diagnosing cardiovascular diseases before clinical manifestations. Presumably, measuring the level of ST2 in heart transplant may have diagnostic and prognostic value in the assessment of graft and risk of rejection. Currently, accumulated clinical data on the role of given biomarker in heart transplantation are not enough, and further research on the relation of ST2 levels with different clinical and laboratory parameters in heart recipients is necessary. 

  17. Identification and characterization of two novel cytosolic sulfotransferases, SULT1 ST7 and SULT1 ST8, from zebrafish

    Energy Technology Data Exchange (ETDEWEB)

    Liu, T.-A. [Department of Pharmacology, College of Pharmacy, University of Toledo, Toledo, OH 43606 (United States); Department of Biological Science and Technology, College of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan (China); Bhuiyan, Shakhawat [Division of Arts and Sciences, Jarvis Christian College, Hawkins, TX 75765 (United States); Snow, Rhodora [School of Mathematics and Science, J. Sargeant Reynolds Community College, Richmond, VA 23285 (United States); Yasuda, Shin; Yasuda, Tomoko [Department of Pharmacology, College of Pharmacy, University of Toledo, Toledo, OH 43606 (United States); Yang, Y.-S. [Department of Biological Science and Technology, College of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan (China); Williams, Frederick E.; Liu, M.-Y.; Suiko, Masahito [Department of Pharmacology, College of Pharmacy, University of Toledo, Toledo, OH 43606 (United States); Carter, Glendora [School of Mathematics and Science, J. Sargeant Reynolds Community College, Richmond, VA 23285 (United States); Liu, M.-C. [Department of Pharmacology, College of Pharmacy, University of Toledo, Toledo, OH 43606 (United States)], E-mail: ming.liu@utoledo.edu

    2008-08-29

    Cytosolic sulfotransferases (SULTs) constitute a family of Phase II detoxification enzymes that are involved in the protection against potentially harmful xenobiotics as well as the regulation and homeostasis of endogenous compounds. Compared with humans and rodents, the zebrafish serves as an excellent model for studying the role of SULTs in the detoxification of environmental pollutants including environmental estrogens. By searching the expressed sequence tag database, two zebrafish cDNAs encoding putative SULTs were identified. Sequence analysis indicated that these two putative zebrafish SULTs belong to the SULT1 gene family. The recombinant form of these two novel zebrafish SULTs, designated SULT1 ST7 and SULT1 ST8, were expressed using the pGEX-2TK glutathione S-transferase (GST) gene fusion system and purified from transformed BL21 (DE3) cells. Purified GST-fusion protein form of SULT1 ST7 and SULT1 ST8 exhibited strong sulfating activities toward environmental estrogens, particularly hydroxylated polychlorinated biphenyls (PCBs), among various endogenous and xenobiotic compounds tested as substrates. pH-dependence experiments showed that SULT1 ST7 and SULT1 ST8 displayed pH optima at 6.5 and 8.0, respectively. Kinetic parameters of the two enzymes in catalyzing the sulfation of catechin and chlorogenic acid as well as 3-chloro-4-biphenylol were determined. Developmental expression experiments revealed distinct patterns of expression of SULT1 ST7 and SULT1 ST8 during embryonic development and throughout the larval stage onto maturity.

  18. Epidemic potential of Escherichia coli ST131 and Klebsiella pneumoniae ST258 : a systematic review and meta-analysis

    NARCIS (Netherlands)

    Dautzenberg, M J D; Haverkate, M R; Bonten, M J M; Bootsma, M C J

    2016-01-01

    OBJECTIVES: Observational studies have suggested that Escherichia coli sequence type (ST) 131 and Klebsiella pneumoniae ST258 have hyperendemic properties. This would be obvious from continuously high incidence and/or prevalence of carriage or infection with these bacteria in specific patient

  19. Virulence of invasive Salmonella Typhimurium ST313 in animal models of infection.

    Directory of Open Access Journals (Sweden)

    Girish Ramachandran

    2017-08-01

    Full Text Available Salmonella Typhimurium sequence type (ST 313 produces septicemia in infants in sub-Saharan Africa. Although there are known genetic and phenotypic differences between ST313 strains and gastroenteritis-associated ST19 strains, conflicting data about the in vivo virulence of ST313 strains have been reported. To resolve these differences, we tested clinical Salmonella Typhimurium ST313 and ST19 strains in murine and rhesus macaque infection models. The 50% lethal dose (LD50 was determined for three Salmonella Typhimurium ST19 and ST313 strains in mice. For dissemination studies, bacterial burden in organs was determined at various time-points post-challenge. Indian rhesus macaques were infected with one ST19 and one ST313 strain. Animals were monitored for clinical signs and bacterial burden and pathology were determined. The LD50 values for ST19 and ST313 infected mice were not significantly different. However, ST313-infected BALB/c mice had significantly higher bacterial numbers in blood at 24 h than ST19-infected mice. ST19-infected rhesus macaques exhibited moderate-to-severe diarrhea while ST313-infected monkeys showed no-to-mild diarrhea. ST19-infected monkeys had higher bacterial burden and increased inflammation in tissues. Our data suggest that Salmonella Typhimurium ST313 invasiveness may be investigated using mice. The non-human primate results are consistent with clinical data, suggesting that ST313 strains do not cause diarrhea.

  20. The effect of lesion size and tissue remodeling on ST deviation in partial-thickness ischemia

    NARCIS (Netherlands)

    Potse, Mark; Coronel, Ruben; Falcao, Stéphanie; LeBlanc, A.-Robert; Vinet, Alain

    2007-01-01

    BACKGROUND: Myocardial ischemia causes ST segment elevation or depression in electrocardiograms and epicardial leads. ST depression in epicardium overlying the ischemic zone indicates that the ischemia is nontransmural. However, nontransmural ischemia does not always cause ST depression. Especially

  1. Environmental issues in the 21st century

    International Nuclear Information System (INIS)

    Chambers, D.B.

    2002-01-01

    Environmental issues in the 21st century D.B. Chambers SENES Consultants Limited, Richmond Hill, Ontario, Canada Abstract. This paper provides an overview of some of the environmental challenges facing the uranium production industry in the 21st century. For many years, the linear, non-threshold (LNT) model has been regarded as a prudent hypothesis for radiation protection purposes. This paradigm has been challenged at the same time for both underestimating and overestimating the risks from ionizing radiation. The reality is that the ability of conventional epidemiology to distinguish small risks will always be limited by statistical power at low doses. In the future, there will be increased emphasis on better understanding the effects of ionizing radiation at the cellular (and sub cellular) level. The concept of 'controllable dose' has been proposed as an alternative to the International Commission on Radiological Protection's (ICRP) current approach to dose limitation. The concept is that if the most exposed individual is protected, then society as a whole is protected. A hazard ranking scale based on comparisons to natural background levels of radiation has been proposed. Adoption of a concept such as 'controllable dose' would require a parallel re-evaluation of the concepts and application of collective dose and ALARA optimization. The protection of non-human biota is an issue of considerable interest in many countries. The science in this area is rapidly evolving, as are discussions of a more philosophical nature. For example, should the focus of environmental risk assessment be the sustainability of the population or should the focus be to limit effects on a single member of the population? The future of environmental risk assessment should be of great interest to the uranium production industry. A systematic approach to risk assessment addressing the full scope of potential hazards -- environmental, human health, engineering, financial and others -- will be

  2. Serum Soluble ST2 and Diastolic Dysfunction in Hypertensive Patients

    Directory of Open Access Journals (Sweden)

    Anca Daniela Farcaş

    2017-01-01

    Full Text Available Background. Echocardiographic evaluation of left ventricular (LV structural and functional alterations in hypertension has some limitations, potentially overcome by using biomarkers. ST2, a prognostic biomarker for heart failure and myocardial infarction patients, was less studied in hypertension. Aim. To analyze the relationship between serum ST2 levels and diastolic dysfunction (DD in hypertension. Method. We enrolled 88 hypertensive outpatients (average age 65 years, 69.3% females in a prospective study, stratified for presence of LV hypertrophy (LVH. For each patient clinical examination, lab workup (routine and serum ST2 levels and echocardiography were performed. Results. Hypertensive patients with LVH had higher age, pulse pressure, mean arterial pressure, and serum ST2, while having lower serum albumin than those without LVH. Serum ST2 levels correlate with parameters of LV remodeling and DD. We found that 5.3% of ST2 level variability was caused by a 1-unit variation of cardiovascular risk. We identified cut-off values for discriminating hypertension with LVH versus that without LVH and grade 2 DD versus normal diastolic performance. Conclusion. ST2 could be used as diagnostic biomarker for cardiac remodeling and altered diastolic performance in hypertension, providing additional data to echocardiography. It could represent a milestone in early detection of cardiac performance alteration.

  3. Biofabrication: a 21st century manufacturing paradigm

    International Nuclear Information System (INIS)

    Mironov, V; Trusk, T; Markwald, R; Kasyanov, V; Little, S; Swaja, R

    2009-01-01

    Biofabrication can be defined as the production of complex living and non-living biological products from raw materials such as living cells, molecules, extracellular matrices, and biomaterials. Cell and developmental biology, biomaterials science, and mechanical engineering are the main disciplines contributing to the emergence of biofabrication technology. The industrial potential of biofabrication technology is far beyond the traditional medically oriented tissue engineering and organ printing and, in the short term, it is essential for developing potentially highly predictive human cell- and tissue-based technologies for drug discovery, drug toxicity, environmental toxicology assays, and complex in vitro models of human development and diseases. In the long term, biofabrication can also contribute to the development of novel biotechnologies for sustainable energy production in the future biofuel industry and dramatically transform traditional animal-based agriculture by inventing 'animal-free' food, leather, and fur products. Thus, the broad spectrum of potential applications and rapidly growing arsenal of biofabrication methods strongly suggests that biofabrication can become a dominant technological platform and new paradigm for 21st century manufacturing. The main objectives of this review are defining biofabrication, outlining the most essential disciplines critical for emergence of this field, analysis of the evolving arsenal of biofabrication technologies and their potential practical applications, as well as a discussion of the common challenges being faced by biofabrication technologies, and the necessary conditions for the development of a global biofabrication research community and commercially successful biofabrication industry. (topical review)

  4. Ionizing radiation in 21st century

    International Nuclear Information System (INIS)

    Jaworowski, Zbigniew

    2005-01-01

    The paper begins with the author's personal experience in Poland on the occasion of Chernobyl nuclear accident followed by main lessons that the author could deduce from the accident. After the discovery of ionizing radiation at the end of 19th century, social perception has altered between acceptance and rejection stemming from recognition of the basic aspects: usefulness for medical applications and for technical and scientific aims, beneficial effects of their low levels, and harmful effects of high levels. The author explains how linear no-threshold (LNT) assumption according to which even the lowest, near zero doses of radiation may cause cancer genetic harm has become established. Comparing the natural radioactivity of the earth's crust with the activity of much shorter-lived radioactive wastes from the nuclear power cycle, it is concluded that none of the man-made component of the radioactive wastes has higher-toxicity than the natural Th 232. The paper concludes by stating that one century has not been long enough to adapt mentally to ionizing radiation and radioactivity and perhaps 21st century will suffice for this adaptation. (S. Ohno)

  5. Vaccines for the 21st century

    Science.gov (United States)

    Delany, Isabel; Rappuoli, Rino; De Gregorio, Ennio

    2014-01-01

    In the last century, vaccination has been the most effective medical intervention to reduce death and morbidity caused by infectious diseases. It is believed that vaccines save at least 2–3 million lives per year worldwide. Smallpox has been eradicated and polio has almost disappeared worldwide through global vaccine campaigns. Most of the viral and bacterial infections that traditionally affected children have been drastically reduced thanks to national immunization programs in developed countries. However, many diseases are not yet preventable by vaccination, and vaccines have not been fully exploited for target populations such as elderly and pregnant women. This review focuses on the state of the art of recent clinical trials of vaccines for major unmet medical needs such as HIV, malaria, TB, and cancer. In addition, we describe the innovative technologies currently used in vaccine research and development including adjuvants, vectors, nucleic acid vaccines, and structure-based antigen design. The hope is that thanks to these technologies, more diseases will be addressed in the 21st century by novel preventative and therapeutic vaccines. PMID:24803000

  6. Zero-knowledge ST-DM watermarking

    Science.gov (United States)

    Piva, A.; Cappellini, V.; Corazzi, D.; De Rosa, A.; Orlandi, C.; Barni, M.

    2006-02-01

    Recently the research in the watermarking field has concentrated its attention to the security aspects. In a watermarking application one of the most sensitive steps from the point of view of security, is the watermark extraction process: here, a prover has to prove to a verifier that a given watermark is present into the content. In the design of the system, it has to be considered that the prover is not a trusted party: the prover could try to exploit the knowledge acquired during watermark extraction to remove the embedded code and, consequently, to undermine the security of the watermarking system. To tackle this particular issue, it has been proposed to use some cryptographic techniques, defined zero-knowledge protocols, for building a secure layer on top of the watermarking channel, able to protect the watermarking algorithm against a possible information leakage. Up till now, zero-knowledge protocols have been applied to spread-spectrum based detectable watermarking algorithms. In this paper, a novel zero-knowledge protocol designed for a Spread Transform Dither Modulation (ST-DM) watermarking algorithm, belonging to the class of the informed watermarking systems, is proposed.

  7. Pharmacognosy in the 21st century.

    Science.gov (United States)

    Douglas Kinghorn, A

    2001-02-01

    The term pharmacognosy as a constituent scientific discipline of pharmacy has been in use for nearly 200 years, and it refers to studies on natural product drugs. During the last half of the 20th century, pharmacognosy evolved from being a descriptive botanical subject to one having a more chemical and biological focus. At the beginning of the 21st century, pharmacognosy teaching in academic pharmacy institutions has been given new relevance, as a result of the explosive growth in the use of herbal remedies (phytomedicines) in modern pharmacy practice, particularly in western Europe and North America. In turn, pharmacognosy research areas are continuing to expand, and now include aspects of cell and molecular biology in relation to natural products, ethnobotany and phytotherapy, in addition to the more traditional analytical method development and phytochemistry. Examples are provided in this review of promising bioactive compounds obtained in two multidisciplinary natural product drug discovery projects, aimed at the elucidation of new plant-derived cancer chemotherapeutic agents and novel cancer chemopreventives, respectively. The systematic study of herbal remedies offers pharmacognosy groups an attractive new area of research, ranging from investigating the biologically active principles of phytomedicines and their mode of action and potential drug interactions, to quality control, and involvement in clinical trials.

  8. Science for the 21st Century

    Energy Technology Data Exchange (ETDEWEB)

    2004-07-01

    The Federal government plays a key role in supporting the country's science infrastructure, a national treasure, and scientific research, an investment in our future. Scientific discoveries transform the way we think about our universe and ourselves, from the vastness of space to molecular-level biology. In innovations such as drugs derived through biotechnology and new communications technologies we see constant evidence of the power of science to improve lives and address national challenges. We had not yet learned to fly at the dawn of the 20th century, and could not have imagined the amazing 20th century inventions that we now take for granted. As we move into the 21st century, we eagerly anticipate new insights, discoveries, and technologies that will inspire and enrich us for many decades to come. This report presents the critical responsibilities of our Federal science enterprise and the actions taken by the Federal research agencies, through the National Science and Technology Council, to align our programs with scientific opportunity and with national needs. The many examples show how our science enterprise has responded to the President's priorities for homeland and national security, economic growth, health research, and the environment. In addition, we show how the science agencies work together to set priorities; coordinate related research programs; leverage investments to promote discovery, translate science into national benefits, and sustain the national research enterprise; and promote excellence in math and science education and work force development.

  9. Departure into the 21st century

    International Nuclear Information System (INIS)

    Wolf, R.

    1998-01-01

    At its 51st annual meeting, the Association of Industrial Power Companies (VIK) commented upon the items relating to energy and to the environment contained in the coalition agreement of the Social Democratic Party (SPD) and Alliance 90/The Greens, expressing the point of view of industry and trade. In the opinion of the VIK the plans to opt out of nuclear power have not been fully thought out as far as repercussions on the labor market and on energy policy are concerned. Nuclear power must not be given up at the expense of industry engaged in international competition and the jobs provided by industry. Opting out of nuclear power quickly and without indemnification is unacceptable. The VIK regards the labor market effects of any measure planned as the yardstick to be applied to the coalition agreement. Any decision about energy policy must be seen in connection with the deregulation of the electricity and gas markets. The VIK also holds a critical view of the coalition's intention to amend the Power Economy Act adopted only recently. (orig.) [de

  10. Engineering toxins for 21st century therapies.

    Science.gov (United States)

    Chaddock, John A; Acharya, K Ravi

    2011-04-01

    'Engineering Toxins for 21st Century Therapies' (9-10 September 2010) was part of the Royal Society International Seminar series held at the Kavli International Centre, UK. Participants were assembled from a range of disciplines (academic, industry, regulatory, public health) to discuss the future potential of toxin-based therapies. The meeting explored how the current structural and mechanistic knowledge of toxins could be used to engineer future toxin-based therapies. To date, significant progress has been made in the design of novel recombinant biologics based on domains of natural toxins, engineered to exhibit advantageous properties. The meeting concluded, firstly that future product development vitally required the appropriate combination of creativity and innovation that can come from the academic, biotechnology and pharma sectors. Second, that continued investigation into understanding the basic science of the toxins and their targets was essential in order to develop new opportunities for the existing products and to create new products with enhanced properties. Finally, it was concluded that the clinical potential for development of novel biologics based on toxin domains was evident. © 2011 The Authors Journal compilation © 2011 FEBS.

  11. Different properties of polysialic acids synthesized by the polysialyltransferases ST8SIA2 and ST8SIA4.

    Science.gov (United States)

    Mori, Airi; Hane, Masaya; Niimi, Yuki; Kitajima, Ken; Sato, Chihiro

    2017-09-01

    Polysialic acid (polySia) is mainly found as a modification of neural cell adhesion molecule (NCAM) in whole embryonic brains, as well as restricted areas of adult vertebrate brains, including the hippocampus. PolySia shows not only repulsive effects on NCAM-involved cell-cell interactions due to its bulky and hydrated properties, but also attractive effects on the interaction with neurologically active molecules, which exerts a reservoir function. Two different polysialyltransferases, ST8SIA2 and ST8SIA4, are involved in the synthesis of polySia chains; however, to date, the differences of the properties between polySia chains synthesized by these two enzymes remain unknown. In this study, to clarify this point, we first prepared polySia-NCAMs from HEK293 cells stably expressing ST8SIA4 and ST8SIA2, or ST8SIA2 (SNP-7), a mutant ST8SIA2 derived from a schizophrenia patient. The conventional sensitive chemical and immunological characterizations showed that the quantity and quality (structural features) of polySia are not so much different between ST8SIA4- and ST8SIA2-synthesized ones, apart from those of ST8SIA2 (SNP-7). Then, we assessed the homophilic and heterophilic interactions mediated by polySia-NCAM by adopting a surface plasmon resonance measurement as an in vitro analytical method. Our novel findings are as follows: (i) the ST8SIA2- and ST8SIA4-synthesized polySia-NCAMs exhibited different attractive and repulsive effects than each other; (ii) both polySia- and oligoSia-NCAMs synthesized by ST8SIA2 were able to bind polySia-NCAMs; (iii) the polySia-NCAM synthesized by a ST8SIA2 (SNP-7) showed markedly altered attractive and repulsive properties. Collectively, polySia-NCAM is suggested to simultaneously possess both attractive and repulsive properties that are highly regulated by the two polysialyltransferases. © The Author 2017. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  12. St. Vicent Ferrer’s Catalán sermon on St. Martin of Tours

    Directory of Open Access Journals (Sweden)

    Ferreiro, Alberto

    2013-12-01

    Full Text Available One of the most widely venerated saints in the Middle Ages was St. Martin of Tours whose cult continues to this day in many parts of the world. In the Middle Ages, he became as popular as other major saints such as Thomas Becket, Santiago de Compostela and the Virgin Mary. St. Martin’s cult became very prominent in the Iberian Peninsula before and after the emergence of the cult of Santiago de Compostela. In St. Vicent Ferrer’s voluminous sermons this one in Catalán is dedicated to this most venerated Gallic saint. The most important late antique and early medieval sources that form the background of this sermon are by Sulpicius Severus- the Gallus and Vita Sancti Martini. In the high Middle Ages, however, his cult was popularized through the Legenda Aurea written by the Dominican Jacobus of Voragine, who synthesized Sulpicius’ two works on St. Martin. Moreover, St. Vicent preached not to make any major doctrinal breakthroughs- his main interest was to evangelize, not to write academic theology- he nevertheless exhibited great creativity. The object of this study is St. Vicent’s Catalán sermon Alius Sermo Sancti Martini, CXXXIV.Uno de los santos más venerados en la edad media fue San Martín de Tours, cuyo culto continúa hasta hoy en muchas partes del mundo. En la edad media, se hizo tan popular como otros grandes Santos: Thomas Becket, Santiago de Compostela y la Virgen María. El culto de San Martín se hizo prominente en la Península Ibérica antes y después de la aparición del culto a Santiago de Compostela. En los sermones voluminosos de San Vicente Ferrer esta uno en Catalán que está dedicado a este santo tan venerado de Galia. Las fuentes más importantes procedentes de la antigu.edad tardía y principios medievales que forma el fondo de este sermón son Gallus y la Vita Sancti Martini de Sulpicio Severo. Sin embargo, en la alta edad media, su culto se popularizó a través de la Legenda Aurea escrita por el dominico

  13. Using SDI-12 with ST microelectronics MCU's

    Energy Technology Data Exchange (ETDEWEB)

    Saari, Alexandra [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Hinzey, Shawn Adrian [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Frigo, Janette Rose [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Proicou, Michael Chris [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Borges, Louis [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2015-09-03

    ST Microelectronics microcontrollers and processors are readily available, capable and economical processors. Unfortunately they lack a broad user base like similar offerings from Texas Instrument, Atmel, or Microchip. All of these devices could be useful in economical devices for remote sensing applications used with environmental sensing. With the increased need for environmental studies, and limited budgets, flexibility in hardware is very important. To that end, and in an effort to increase open support of ST devices, I am sharing my teams' experience in interfacing a common environmental sensor communication protocol (SDI-12) with ST devices.

  14. Inferior ST-Elevation Myocardial Infarction Associated with Takotsubo Cardiomyopathy

    Directory of Open Access Journals (Sweden)

    Oliver Koeth

    2010-01-01

    Full Text Available Takotsubo cardiomyopathy (TCM is usually characterized by transient left ventricular apical ballooning. Due to the clinical symptoms which include chest pain, electrocardiographic changes, and elevated myocardial markers, Takotsubo cardiomyopathy is frequently mimicking ST-elevation myocardial infarction in the absence of a significant coronary artery disease. Otherwise an acute occlusion of the left anterior descending coronary artery can produce a typical Takotsubo contraction pattern. ST-elevation myocardial infarction (STEMI is frequently associated with emotional stress, but to date no cases of STEMI triggering TCM have been reported. We describe a case of a female patient with inferior ST-elevation myocardial infarction complicated by TCM.

  15. Constructive singularities and energy efficiency of St. Petersburg historic circuses

    Science.gov (United States)

    Sysoeva, Elena; Trushina, Ekaterina

    2017-10-01

    The article is devoted to the design and construction of St. Petersburg circuses during the period since 1822 till nowadays. The article presents the characteristics of all eight historic buildings of St. Petersburg and their structural and architectural features. The article raises some issues of energy-optimal shape of a building on the example of St. Petersburg modern circus building. There are several historical drawings and photographs of the circus buildings. The article includes overview of normative regulation of circus buildings in Russia since the middle of the twentieth century and prospects for the future.

  16. First detection of methicillin-resistant Staphylococcus aureus ST398 and Staphylococcus pseudintermedius ST68 from hospitalized equines in Spain.

    Science.gov (United States)

    Gómez-Sanz, E; Simón, C; Ortega, C; Gómez, P; Lozano, C; Zarazaga, M; Torres, C

    2014-05-01

    Eight coagulase-positive staphylococci from equines with different pathologies obtained between 2005 and 2011 were investigated. Isolates were characterized by different molecular techniques (spa-, agr-, MLST), and clonal relatedness of strains was investigated by ApaI and SmaI PFGE. Anti-microbial resistance and virulence profiles were determined. Six isolates were identified as Staphylococcus aureus, and two as Staphylococcus pseudintermedius. Of these, four isolates were methicillin-resistant S. aureus (MRSA) ST398 and one S. pseudintermedius was mecA positive and typed as ST68. One MRSA ST398 strain was isolated in 2005 and might be one of the earliest MRSA ST398 descriptions in Spain. All 5 mecA-positive strains were multidrug resistant and were isolated from hospitalized equines. Three MRSA ST398 strains carried the recently described transposon Tn559 within the chromosomal radC gene. The mecA-positive S. pseudintermedius ST68 strain was also multidrug resistant and harboured the erm(B)-Tn5405-like element. This ST68 strain presented a clear susceptible phenotype to oxacillin and cefoxitin regardless of the presence of an integral and conserved mecA gene and mecA promoter, which enhances the need for testing the presence of this gene in routine analysis to avoid treatment failures. These data reflect the extended anti-microbial resistance gene acquisition capacities of both bacterial species and evidence their pathogenic properties. The first detection of MRSA ST398 and S. pseudintermedius ST68 in horses in Spain is reported. © 2013 Blackwell Verlag GmbH.

  17. Lithium Resources for the 21st Century

    Science.gov (United States)

    Kesler, S.; Gruber, P.; Medina, P.; Keolian, G.; Everson, M. P.; Wallington, T.

    2011-12-01

    Lithium is an important industrial compound and the principal component of high energy-density batteries. Because it is the lightest solid element, these batteries are widely used in consumer electronics and are expected to be the basis for battery electric vehicles (BEVs), hybrid electric vehicles (HEVs) and plug-in hybrid electric vehicles (PHEVs) for the 21st century. In view of the large incremental demand for lithium that will result from expanded use of various types of EVs, long-term estimates of lithium demand and supply are advisable. For GDP growth rates of 2 to 3% and battery recycling rates of 90 to 100%, total demand for lithium for all markets is expected to be a maximum of 19.6 million tonnes through 2100. This includes 3.2 million tonnes for industrial compounds, 3.6 million tonnes for consumer electronics, and 12.8 million tonnes for EVs. Lithium-bearing mineral deposits that might supply this demand contain an estimated resource of approximately 39 million tonnes, although many of these deposits have not been adequately evaluated. These lithium-bearing mineral deposits are of two main types, non-marine playa-brine deposits and igneous deposits. Playa-brine deposits have the greatest immediate resource potential (estimated at 66% of global resources) and include the Salar de Atacama (Chile), the source of almost half of current world lithium production, as well as Zabuye (China/Tibet) and Hombre Muerto (Argentina). Additional important playa-brine lithium resources include Rincon (Argentina), Qaidam (China), Silver Peak (USA) and Uyuni (Bolivia), which together account for about 35% of the estimated global lithium resource. Information on the size and continuity of brine-bearing aquifers in many of these deposits is limited, and differences in chemical composition of brines from deposit to deposit require different extraction processes and yield different product mixes of lithium, boron, potassium and other elements. Numerous other brines in playas

  18. 21st Century's energy: Hydrogen energy system

    International Nuclear Information System (INIS)

    Veziroglu, T. Nejat; Sahin, Suemer

    2008-01-01

    Fossil fuels (i.e., petroleum, natural gas and coal), which meet most of the world's energy demand today, are being depleted fast. Also, their combustion products are causing the global problems, such as the greenhouse effect, ozone layer depletion, acid rains and pollution, which are posing great danger for our environment and eventually for the life in our planet. Many engineers and scientists agree that the solution to these global problems would be to replace the existing fossil fuel system by the hydrogen energy system. Hydrogen is a very efficient and clean fuel. Its combustion will produce no greenhouse gases, no ozone layer depleting chemicals, little or no acid rain ingredients and pollution. Hydrogen, produced from renewable energy (e.g., solar) sources, would result in a permanent energy system, which we would never have to change. However, there are other energy systems proposed for the post-petroleum era, such as a synthetic fossil fuel system. In this system, synthetic gasoline and synthetic natural gas will be produced using abundant deposits of coal. In a way, this will ensure the continuation of the present fossil fuel system. The two possible energy systems for the post-fossil fuel era (i.e., the solar-hydrogen energy system and the synthetic fossil fuel system) are compared with the present fossil fuel system by taking into consideration production costs, environmental damages and utilization efficiencies. The results indicate that the solar-hydrogen energy system is the best energy system to ascertain a sustainable future, and it should replace the fossil fuel system before the end of the 21st century

  19. 21st century's energy: hydrogen energy system

    International Nuclear Information System (INIS)

    Veziroglu, T. N.

    2007-01-01

    Fossil fuels (i.e., petroleum, natural gas and coal), which meet most of the world's energy demand today, are being depleted fast. Also, their combustion products are causing the global problems, such as the greenhouse effect, ozone layer depletion, acid rains and pollution, which are posing great danger for our environment and eventually for the life in our planet. Many engineers and scientists agree that the solution to these global problems would be to replace the existing fossil fuel system by the Hydrogen Energy System. Hydrogen is a very efficient and clean fuel. Its combustion will produce no greenhouse gases, no ozone layer depleting chemicals, little or no acid rain ingredients and pollution. Hydrogen, produced from renewable energy (e.g., solar) sources, would result in a permanent energy system, which we would never have to change. However, there are other energy systems proposed for the post-petroleum era, such as a synthetic fossil fuel system. In this system, synthetic gasoline and synthetic natural gas will be produced using abundant deposits of coal. In a way, this will ensure the continuation of the present fossil fuel system. The two possible energy systems for the post-fossil fuel era (i.e., the solar hydrogen energy system and the synthetic fossil fuel system) are compared with the present fossil fuel system by taking into consideration production costs, environmental damages and utilization efficiencies. The results indicate that the solar hydrogen energy system is the best energy system to ascertain a sustainable future, and it should replace the fossil fuel system before the end of the 21st Century

  20. Diagnostic Development for ST Plasmas on NSTX

    International Nuclear Information System (INIS)

    Johnson, D.

    2003-01-01

    Spherical tokamaks (STs) have much lower aspect ratio (a/R) and lower toroidal magnetic field, relative to tokamaks and stellarators. This paper will highlight some of the challenges and opportunities these features pose in the diagnosis of ST plasmas on the National Spherical Torus Experiment (NSTX), and discuss some of the corresponding diagnostic development that is underway. The low aspect ratio necessitates a small center stack, with tight space constraints and large thermal excursions, complicating the design of magnetic sensors in this region. The toroidal magnetic field on NSTX is less than or equal to 0.6 T, making it impossible to use ECE as a good monitor of electron temperature. A promising new development for diagnosing electron temperature is electron Bernstein wave (EBW) radiometry, which is currently being pursued on NSTX. A new high-resolution charge exchange recombination spectroscopy system is being installed. Since non-inductive current initiation and sustainment ar e top-level NSTX research goals, measurements of the current profile J(R) are essential to many planned experiments. On NSTX several modifications are planned to adapt the MSE technique to lower field, and two novel MSE systems are being prototyped. Several high speed 2-D imaging techniques are being developed, for viewing both visible and x-ray emission. The toroidal field is comparable to the poloidal field at the outside plasma edge, producing a large field pitch (>50 o ) at the outer mid-plane. The large shear in pitch angle makes some fluctuation diagnostics like beam emission spectroscopy very difficult, while providing a means of achieving spatial localization for microwave scattering investigations of high-k turbulence, which are predicted to be virulent for NSTX plasmas. A brief description of several of these techniques will be given in the context of the current NSTX diagnostic set

  1. Pediatrics in 21st Century and Beyond.

    Science.gov (United States)

    Singh, Meharban

    2016-11-01

    Pediatrics is a dynamic discipline and there is awareness and hope for actualizing outstanding achievements in the field of child health in 21 st century and beyond. Improved lifestyle and quality of children's health is likely to reduce the burden of adult diseases and enhance longevity because seeds of most adult diseases are sown in childhood. Identification and decoding of human genome is expected to revolutionize the practice of pediatrics. The day is not far off when a patient will walk into doctor's chamber with an electronic or digital health history on a CD or palmtop and a decoded genomic constitution. There will be reduced burden of genetic diseases because of selective abortions of "defective" fetuses and replacement of "bad" genes with "good" ones by genetic engineering. Availability of totipotent stem cells and developments in transplant technology are likely to revolutionize the management of a variety of hematologic cancers and life-threatening genetic disorders. The possibility of producing flawless designer babies by advances in assisted reproductive technologies (ARTs) is likely to be mired by several ethical and legal issues.The availability of newer vaccines by recombinant technology for emerging infective and for non-infective lifestyle diseases is likely to improve survival and quality of life. There is going to be a greater focus on the "patient" having the disease rather than "disease" per se by practicing holistic pediatrics by effective utilization of alternative or complementary strategies for health care. Due to advances in technology, pediatrics may get further dehumanized. A true healer cannot simply rely on technology; there must be a spiritual bond between the patient and the physician by exploiting the concept of psycho-neuro-immunology and body-mind interactions. In the years to come, physicians are likely to play "god" but medicine can't achieve immortality because anything born must die in accordance with nature's recycling

  2. New St-chromosome-specific molecular markers for identifying ...

    Indian Academy of Sciences (India)

    chromosome-specific PLUG and SCAR markers, and successfully used them to detect the St-chromosome in wheat–Th. intermedium introgression lines. Materials and methods. Plant materials. Wheat line ML13 was provided by International Maize and.

  3. The Chinese Program at St. Louis University High School

    Science.gov (United States)

    Wang, August

    1977-01-01

    Chinese courses at the St. Louis University High School teach language, culture and calligraphy. Daily classes feature language labs, slides, filmstrips and movies. Statements from students testify that the language is useful and not difficult to learn. (CHK)

  4. Refresher Course in Theoretical Physics at St. Stephen's College ...

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 7; Issue 5. Refresher Course in Theoretical Physics at St. Stephen's College University of Delhi, Delhi. Information and Announcements Volume 7 Issue 5 May 2002 pp 103-103 ...

  5. St. Louis River Estuary 2011 - 2013 Faucet snail location data

    Data.gov (United States)

    U.S. Environmental Protection Agency — The dataset consists of GPS coordinates for benthic invertebrate collections made in the St. Louis River Estuary in 2011 through 2013, and information on whether and...

  6. State Waste Discharge Permit ST-4502 Implementation Plan

    Energy Technology Data Exchange (ETDEWEB)

    BROWN, M.J.; LECLAIR, M.D.

    2000-09-27

    Plan has been developed to demonstrate compliance with regulatory requirements set forth in Permit ST-3502 and as a line management tool for use in maintaining configuration control of permit as well as documentation used to implement permit requirements.

  7. EMSL Quarterly Highlights Report: 1st Quarter, FY08

    Energy Technology Data Exchange (ETDEWEB)

    Showalter, Mary Ann

    2008-01-28

    The EMSL Quarterly Highlights Report covers the science, staff and user recognition, and publication activities that occurred during the 1st quarter (October 2007 - December 2007) of Fiscal Year 2008.

  8. Severe hypocalcemia simulating ST-elevation myocardial infarction.

    Science.gov (United States)

    Ilveskoski, Erkki; Sclarovsky, Samuel; Nikus, Kjell

    2012-01-01

    ST-elevation myocardial infarction (STEMI) is an emergency situation in which immediate measures for myocardial reperfusion are needed. The diagnosis is based on the recognition of ST-segment elevation in the electrocardiogram (ECG). In case of coronary artery occlusion, ST-segment elevation is caused by an injury current from the ischemic myocardium. Rarely, other mechanisms may lead to ECG changes mimicking STEMI. In our case, a 65-year-old man was presented to our institution with ECG abnormalities suggestive of STEMI. However, coronary angiography showed open arteries. Laboratory tests revealed severe hypocalcemia caused by a deficiency of vitamin D. After calcium replacement therapy, the ECG normalized, and the patient was discharged in good condition. Only a few case reports on hypocalcemia-induced ST-segment elevation exist, and the mechanism remains unknown.

  9. St. Louis River water quality assessment 2012, 2013

    Data.gov (United States)

    U.S. Environmental Protection Agency — St. Louis River Area of Concern surface water nutrient (TP, TN, NOx-N, NH4-N), dissolved oxygen, and particulate (TSS, chlorophyll a) concentration data from 2012...

  10. Hydrogen applications for Lambert-St. Louis International Airport

    Science.gov (United States)

    2009-01-01

    Today, major airports are facing challenges related to pollution, energy efficiency, and safety and security. Hydrogen and fuel cell technologies, regarded as one of the key energy solutions of the 21st century are more energy efficient and reliable ...

  11. EMSL Quarterly Highlights Report: 1st Quarter, Fiscal Year 2009

    Energy Technology Data Exchange (ETDEWEB)

    Showalter, Mary Ann; Kathmann, Loel E.; Manke, Kristin L.

    2009-02-02

    The EMSL Quarterly Highlights Report covers the science, staff and user recognition, and publication activities that occurred during the 1st quarter (October 2008 - December 2008) of Fiscal Year 2009.

  12. St. John Shallow-water Ground Validation Transects

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Benthic habitat maps of the nearshore marine environment of St. John, U.S. Virgin Islands were created by visual interpretation of remotely sensed imagery. The...

  13. St. John Shallow-water Ground Validation Sites

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Benthic habitat maps of the nearshore marine environment of St. John, U.S. Virgin Islands were created by visual interpretation of remotely sensed imagery. The...

  14. Exploitation Tactics: A Doctrine for the 21st Century

    National Research Council Canada - National Science Library

    Hartman, William J

    2008-01-01

    .... The paper uses a case study of the 2-25 Stryker Brigade Combat Team to demonstrate how to restructure a modular brigade size organization to increase its effectiveness on a 21st Century battlefield...

  15. St. Paul central corridor study : Pierce Butler industrial redevelopment parkway

    Science.gov (United States)

    2003-07-01

    At present, development in the St. Paul Central Corridor is occurring piecemeal and lacks an integrative vision. This study's aim was to devise design approaches that create a district which integrates light industrial job creation and retention with...

  16. Book Reviews: Conflict resolution in the 21st century: Principles ...

    African Journals Online (AJOL)

    Abstract. Conflict resolution in the 21st century: Principles, methods and approaches. Bercovitch, Jacob and Richard Jackson 2009. Ann Arbor, MI, University of Michigan Press 2009, 226 pages. ISBN 9780472050628 ...

  17. Gibberella zeae on St. John's wort in Serbia

    Directory of Open Access Journals (Sweden)

    Pavlović Snežana

    2012-01-01

    Full Text Available Gibberella zeae (anamorph Fusarium graminearum was determined on seed of St. John's wort produced in localities Pančevo, Gorobilje and Kačarevo during 2008 and 2009. Morphological characteristics of monosporial isolates were described. All tested isolates formed in vitro perithecia, and were classified as F. graminearum (syn. F. graminearum Group 2. Pathogenicity was confirmed by the artificial inoculation of St. John's wort seed.

  18. Audiovisuaalinen koulutuspaketti ensihoitohenkilöstölle peruselintoimintojen mittaamisesta

    OpenAIRE

    Pelkonen, Juha

    2013-01-01

    Tiivistelmä Tämä opinnäyteyö oli kehittämistyö, jonka tarkoituksena oli laatia audiovisuaalinen koulutuspaketti peruselintoimintojen mittaamisesta Pohjois-Savon pelastuslaitokselle ensihoitohenkilöstölle. Kehittämistyön tavoitteena oli vahvistaa pelastuslaitoksen ensihoitohenkilöstön osaamista peruselintoimintojen mittaamisessa. Koulutuspaketin tavoitteena oli antaa vaihtoehtoinen tapa kerrata jo vanhaa opittua sekä motivoida uuteen oppimiseen audiovisuaalisesti demonstraati...

  19. Nitrering og Karburering af rustfrit stål

    DEFF Research Database (Denmark)

    Christiansen, Thomas; Somers, Marcel A.J.

    2003-01-01

    -fasen med en kombination af nitrogen og carbon i fast opløsning samtidig. Overfladehærdningen af det rustfrie stål ved lav temperatur medfører, at der dannes meget store blivende trykspændinger i overfladen. Nitrering/karbureringsegenskaberne af rustfrit stål AISI 304 og AISI 316 er blevet undersøgt i dette...

  20. "Vi er ikke støttepædagoer"

    DEFF Research Database (Denmark)

    Knudsen, Louise Stjerne

    2014-01-01

    Hvilket talent(udviklings)miljø har talentfulde gymnasieelever brug for, og hvordan ’plejer’ man dem bedst muligt, så de ikke føler, at de bliver ’støttepædagoger’?......Hvilket talent(udviklings)miljø har talentfulde gymnasieelever brug for, og hvordan ’plejer’ man dem bedst muligt, så de ikke føler, at de bliver ’støttepædagoger’?...

  1. Naval S&T Strategy: Innovations For The Future Force

    Science.gov (United States)

    2015-01-01

    solutions. This strategy enables naval leaders to harvest S&T investments made years ago to speed development of cutting -edge technologies like railguns...emerging challenges. The Naval S&T Vision: Cutting -edge scientific research and technology provides decisive technological advantage and influence...benefit from new high-power density waterjets aimed at staving off rudder and propeller damage experienced on high-speed ships. The new Axial-Flow

  2. The Relevance of Borders in the 21st Century

    Science.gov (United States)

    2017-06-01

    explains how the word frontier has an historical nuance related to the American construction of the nation from the 19th century , and to the differences...THE RELEVANCE OF BORDERS IN THE 21st CENTURY BY LIEUTENANT-COLONEL MATHIEU RIGG, FRENCH AIR FORCE A THESIS PRESENTED TO...v ABSTRACT This study assesses the relevance of borders in the 21st century . The author analyses the different approaches of the concept of

  3. Additions to the avifauna of St Matthew Island, Bering Sea

    Science.gov (United States)

    Johnson, James A.; Matsuoka, Steven M.; Ruthrauff, Daniel R.; Litzow, Michael A.; Dementyev, Maksim N.

    2004-01-01

    St. Matthew Island (60°24' N, 172°42' W) is located in the north-central Bering Sea and is renowned for its distinctive Beringian flora and fauna. Because of its central position between the coasts of Russia and Alaska, St. Matthew Island and its nearby satellites, Hall and Pinnacle islands, support a mixture of Palearctic and Nearctic avifaunas. Of special interest to North American ornithologists are the numerous Eurasian bird species that visit the islands each spring and fall. Winker et al. (2002) published the first comprehensive summary of bird records for the 125 species detected on St. Matthew Island from 1899 to 1997. Because of its remote location, however, St. Matthew Island is seldom visited, and the island's avifauna remains poorly described.As part of an island-wide systematic survey for Rock Sandpipers (Calidris ptilocnemis) and McKay's Buntings (Plectrophenax hyperboreus), our crew of five ornithologists was present on St. Matthew Island from 25 May to 9 July 2003. In this paper we provide information for 11 bird species seen for the first time on St. Matthew Island. Phylogenetic sequence and nomenclature follow the American Ornithologists' Union (1998, 2000) and Banks et al. (2002, 2003, 2004). An annotated species list with details of observation is on file at the University of Alaska Museum, Fairbank.

  4. 31st Annual conference and the 21st annual theoretical seminar of the South African Institute of Physics

    International Nuclear Information System (INIS)

    1986-01-01

    The 31st annual conference and the 21st annual theoretical seminar of the South African Institute of Physics was held from 7-11 July 1986 at the Rand Afrikaans University, Johannesburg. This publication contains only the abstracts of seminars delivered on the conference. The topics that were covered include the various facets of physics such as solid state physics, nuclear and particle physics, optics and spectroscopy, solar-terrestrial physics, education, and applied and industrial physics

  5. Comparative endocrinology in the 21st century

    Science.gov (United States)

    Denver, R.J.; Hopkins, P.M.; McCormick, S.D.; Propper, C.R.; Riddiford, L.; Sower, S.A.; Wingfield, J.C.

    2009-01-01

    responses to the environment. A major challenge for life scientists in the 21st century is to understand how a changing environment impacts all life on earth. A full understanding of the capabilities of organisms to respond to environmental variation, and the resilience of organisms challenged by environmental changes and extremes, is necessary for understanding the impact of pollution and climatic change on the viability of populations. Comparative endocrinologists have a key role to play in these efforts.

  6. Geoscience and the 21st Century Workforce

    Science.gov (United States)

    Manduca, C. A.; Bralower, T. J.; Blockstein, D.; Keane, C. M.; Kirk, K. B.; Schejbal, D.; Wilson, C. E.

    2013-12-01

    Geoscience knowledge and skills play new roles in the workforce as our society addresses the challenges of living safely and sustainably on Earth. As a result, we expect a wider range of future career opportunities for students with education in the geosciences and related fields. A workshop offered by the InTeGrate STEP Center on 'Geoscience and the 21st Century Workforce' brought together representatives from 24 programs with a substantial geoscience component, representatives from different employment sectors, and workforce scholars to explore the intersections between geoscience education and employment. As has been reported elsewhere, employment in energy, environmental and extractive sectors for geoscientists with core geology, quantitative and communication skills is expected to be robust over the next decade as demand for resources grow and a significant part of the current workforce retires. Relatively little is known about employment opportunities in emerging areas such as green energy or sustainability consulting. Employers at the workshop from all sectors are seeking the combination of strong technical, quantitative, communication, time management, and critical thinking skills. The specific technical skills are highly specific to the employer and employment needs. Thus there is not a single answer to the question 'What skills make a student employable?'. Employers at this workshop emphasized the value of data analysis, quantitative, and problem solving skills over broad awareness of policy issues. Employers value the ability to articulate an appropriate, effective, creative solution to problems. Employers are also very interested in enthusiasm and drive. Participants felt that the learning outcomes that their programs have in place were in line with the needs expressed by employers. Preparing students for the workforce requires attention to professional skills, as well as to the skills needed to identify career pathways and land a job. This critical

  7. Environmental issues in the 21st century

    International Nuclear Information System (INIS)

    Chambers, D.B.

    2000-01-01

    This paper provides an overview of some of the environmental challenges facing the uranium production industry in the 21st century. For many years, the linear, non-threshold (LNT) model has been regarded as a prudent hypothesis for radiation protection purposes. This paradigm has been challenged at the same time for both underestimating and overestimating the risks from ionizing radiation. The reality is that the ability of conventional epidemiology to distinguish small risks will always be limited by statistical power at low doses. In the future, there will be increased emphasis on better understanding the effects of ionizing radiation at the cellular (and sub cellular) level. The concept of 'controllable dose' has been proposed as an alternative to the ICRP's current approach to dose limitation. The concept is that if the most exposed individual is protected, then society as a whole is protected. A hazard ranking scale based on comparisons to natural background levels of radiation has been proposed. Adoption of a concept such as 'controllable dose' would require a parallel re-evaluation of the concepts and application of collective dose and ALARA optimization. The protection of non-human biota is an issue of considerable interest in many countries. The science in this area is rapidly evolving, as are discussions of a more philosophical nature. For example, should the focus of environmental risk assessment be the sustainability of the population or should the focus be to limit effects on a single member of the population? The future of environmental risk assessment should be of great interest to the uranium production industry. A systematic approach to risk assessment addressing the full scope of potential hazards - environmental, human health, engineering, financial and others - will be increasingly important in the future. What level of risk is it reasonable to accept? What is meant by 'reasonable'? How much risk can be engineered away, for how long, and at what

  8. The Workforce for the 21st Century

    Directory of Open Access Journals (Sweden)

    Henry O'Lawrence

    2017-04-01

    Full Text Available Aim/Purpose: In today’s changing economy, economic growth depends on career and technical programs for skill training. Background: This study discusses the key area in promoting individual learning and skill training and discusses the importance of career education and training as a way of promoting economic growth. Methodology\t: This study uses a qualitative study approach to investigate and report on the status and influence of Workforce Education and Development and its economic importance. Contribution: This report contributes to the knowledge base common to all work settings that can solve many human performance problems in the workplace. Findings: This study also justifies and validates the ideas on the importance of workforce education and development in the 21st century as a way of developing economic growth and providing learning to make individuals competitive in the global economy. Recommendations for Practitioners\t: For practitioners, this study suggests that we must always have discussions of what leads to career success and understanding that there is not enough high-skill/high-wage employment to go around. Therefore, developing these skills requires a decision about a career or related group of jobs to prepare to compete for them; we have to provide training needed in order to be competitive in global economy. Recommendation for Researchers: Researchers have to develop strategies to promote career direction with willingness to evaluate the level of academic interest, level of career focus and readiness for life away from home (attitudes, skills and knowledge of self. Impact on Society: Institutions must regularly evaluate curriculum to reflect the rapid technological changes and the globalization of world markets that reflect their mission and develop students’ mindset to always think big and think outside the box in order to be competitive in the global market. Change is external, transition is internal. It is important

  9. Reliability and Validity of Michigan School Libraries for the 21st Century Measurement Benchmarks

    Science.gov (United States)

    Floyd, Natosha N.

    2016-01-01

    The purpose of this study was to examine the psychometric properties of the Michigan School Libraries for the 21st Century Measurement Benchmarks (SL21). The instrument consists of 19 items with three subscales: Building the 21st Century Learning Environment Subscale, Teaching for 21st Century Learning Subscale, and Leading the Way to 21st Century…

  10. Differentiating ST elevation myocardial infarction and nonischemic causes of ST elevation by analyzing the presenting electrocardiogram

    DEFF Research Database (Denmark)

    Jayroe, Jason B; Spodick, David H; Nikus, Kjell

    2008-01-01

    Guidelines recommend that patients with suggestive symptoms of myocardial ischemia and ST-segment elevation (STE) in > or =2 adjacent electrocardiographic leads should receive immediate reperfusion therapy. Novel strategies aimed to reduce door-to-balloon time, such as prehospital wireless...... electrocardiographic transmission, may be dependent on the interpretation accuracy of the electrocardiogram (ECG) readers. We assessed the ability of experienced electrocardiographers to differentiate among STE, acute STE myocardial infarction (STEMI), and nonischemic STE (NISTE). A total of 116 consecutive ECGs.......13). The sensitivity and specificity of the individual readers ranged from 50% to 100% (average 75%) and 73% to 97% (average 85%), respectively. There were broad inconsistencies among the readers in the chosen reasons used to classify NISTE. In conclusion, we found wide variations among experienced...

  11. fRMA ST: frozen robust multiarray analysis for Affymetrix Exon and Gene ST arrays.

    Science.gov (United States)

    McCall, Matthew N; Jaffee, Harris A; Irizarry, Rafael A

    2012-12-01

    Frozen robust multiarray analysis (fRMA) is a single-array preprocessing algorithm that retains the advantages of multiarray algorithms and removes certain batch effects by downweighting probes that have high between-batch residual variance. Here, we extend the fRMA algorithm to two new microarray platforms--Affymetrix Human Exon and Gene 1.0 ST--by modifying the fRMA probe-level model and extending the frma package to work with oligo ExonFeatureSet and GeneFeatureSet objects. All packages are implemented in R. Source code and binaries are freely available through the Bioconductor project. Convenient links to all software and data packages can be found at http://mnmccall.com/software mccallm@gmail.com.

  12. Virulence genes in isolates of Klebsiella pneumoniae from the UK during 2016, including among carbapenemase gene-positive hypervirulent K1-ST23 and 'non-hypervirulent' types ST147, ST15 and ST383.

    Science.gov (United States)

    Turton, Jane F; Payne, Zoë; Coward, Amy; Hopkins, Katie L; Turton, Jack A; Doumith, Michel; Woodford, Neil

    2018-01-01

    Klebsiella pneumoniae is a concern because of its multidrug resistance and the ability of hypervirulent types, especially capsular type K1-clonal complex 23 (K1-CC23), to cause community-acquired, life-threatening infections. Hypervirulent types carry an array of virulence genes including rmpA/rmpA2, coding for capsule up-regulation. We sought to identify isolates carrying these elements among submissions to the UK national reference laboratory during 2016. Virulence elements and carbapenemase genes were sought by PCR or from whole genome sequences. Isolates were typed by variable number tandem repeat analysis or by multi locus sequence typing from whole genome sequences. Long read nanopore sequencing was carried out on two isolates.Results/Key findings. Twelve of 1090 isolates (1.1 %) belonged to hypervirulent K1-CC23, with one carrying blaOXA-48 (KpvST23L_OXA-48). A further 24 rmpA/rmpA2-positive isolates were detected: eight belonged to hypervirulent types of capsular types K2 and K54; and 14 belonged to 'non-hypervirulent' ST147, ST15 and ST383 and also carried carbapenemase gene(s). Virulence, heavy metal and antibiotic resistance gene contents were compared from whole genome sequences of KpvST23L_OXA-48 and one of the ST147 isolates carrying blaNDM-1. They carried 94/96 and 26/96 of the virulence genes sought, and 23/23 and 9/23 of the heavy metal resistance genes, respectively. In the ST147 isolate, rmpA/rmpA2 and the aerobactin siderophore cluster were on a large virulence plasmid together with resistance genes. The yersiniabactin cluster was widely present among carbapenemase gene-positive isolates, including among those that were rmpA/rmpA2-negative. Our results highlight a combination of virulence and resistance genes, which could lead to untreatable invasive infections.

  13. Genomic Epidemiology of Hypervirulent Serogroup W, ST-11 Neisseria meningitidis.

    Science.gov (United States)

    Mustapha, Mustapha M; Marsh, Jane W; Krauland, Mary G; Fernandez, Jorge O; de Lemos, Ana Paula S; Dunning Hotopp, Julie C; Wang, Xin; Mayer, Leonard W; Lawrence, Jeffrey G; Hiller, N Luisa; Harrison, Lee H

    2015-10-01

    Neisseria meningitidis is a leading bacterial cause of sepsis and meningitis globally with dynamic strain distribution over time. Beginning with an epidemic among Hajj pilgrims in 2000, serogroup W (W) sequence type (ST) 11 emerged as a leading cause of epidemic meningitis in the African 'meningitis belt' and endemic cases in South America, Europe, Middle East and China. Previous genotyping studies were unable to reliably discriminate sporadic W ST-11 strains in circulation since 1970 from the Hajj outbreak strain (Hajj clone). It is also unclear what proportion of more recent W ST-11 disease clusters are caused by direct descendants of the Hajj clone. Whole genome sequences of 270 meningococcal strains isolated from patients with invasive meningococcal disease globally from 1970 to 2013 were compared using whole genome phylogenetic and major antigen-encoding gene sequence analyses. We found that all W ST-11 strains were descendants of an ancestral strain that had undergone unique capsular switching events. The Hajj clone and its descendants were distinct from other W ST-11 strains in that they shared a common antigen gene profile and had undergone recombination involving virulence genes encoding factor H binding protein, nitric oxide reductase, and nitrite reductase. These data demonstrate that recent acquisition of a distinct antigen-encoding gene profile and variations in meningococcal virulence genes was associated with the emergence of the Hajj clone. Importantly, W ST-11 strains unrelated to the Hajj outbreak contribute a significant proportion of W ST-11 cases globally. This study helps illuminate genomic factors associated with meningococcal strain emergence and evolution.

  14. Hmong Political Involvement in St. Paul, Minnesota and Fresno, California

    Directory of Open Access Journals (Sweden)

    Yang Lor

    2010-01-01

    Full Text Available Over the past several years, Hmong in the United States have gained prominence for their increasing involvement in politics. Most of the attention has understandably focused on Fresno, California and St. Paul, Minnesota, home to the two largest Hmong populations in this country. While the Hmong communities in both cities are similar in size and have made significant political progress as evidenced by the election of Hmong candidates, the Hmong community in St. Paul has made greater inroads in the political realm. In addition to the elections of two Hmong candidates to the Minnesota State Legislature and two to the St. Paul School Board, the Hmong community in St. Paul has been able to engage local and state governments in Minnesotato address issues that affect the Hmong community. Through interviews, census data, and newspaper coverage of political campaigns, I show that Hmong in St. Paul have achieved greaterrepresentation in local and state governments and received greater support from government officials than Hmong in Fresno because Minnesota offers a social, economic, and politicalcontext that is favorable to fostering Hmong political involvement. Compared to Hmong in Fresno, Hmong in St. Paul have higher levels of socioeconomic resources and are more visible given their large size relative to other minority groups. They live in a region with consistently high levels of political participation and have political candidates who devote resources to mobilizing the Hmong community. Moreover, the Hmong vote has been critical to the success of Hmong candidates in St. Paul, an indication of the increasing political clout of the Hmong community there and a major reason why politicians in Minnesota are more willing to respond toissues that affect the Hmong community. Overall, this study highlights the importance of local and regional context in understanding the political incorporation of immigrants.

  15. Genomic Epidemiology of Hypervirulent Serogroup W, ST-11 Neisseria meningitidis

    Science.gov (United States)

    Mustapha, Mustapha M.; Marsh, Jane W.; Krauland, Mary G.; Fernandez, Jorge O.; de Lemos, Ana Paula S.; Dunning Hotopp, Julie C.; Wang, Xin; Mayer, Leonard W.; Lawrence, Jeffrey G.; Hiller, N. Luisa; Harrison, Lee H.

    2015-01-01

    Neisseria meningitidis is a leading bacterial cause of sepsis and meningitis globally with dynamic strain distribution over time. Beginning with an epidemic among Hajj pilgrims in 2000, serogroup W (W) sequence type (ST) 11 emerged as a leading cause of epidemic meningitis in the African ‘meningitis belt’ and endemic cases in South America, Europe, Middle East and China. Previous genotyping studies were unable to reliably discriminate sporadic W ST-11 strains in circulation since 1970 from the Hajj outbreak strain (Hajj clone). It is also unclear what proportion of more recent W ST-11 disease clusters are caused by direct descendants of the Hajj clone. Whole genome sequences of 270 meningococcal strains isolated from patients with invasive meningococcal disease globally from 1970 to 2013 were compared using whole genome phylogenetic and major antigen-encoding gene sequence analyses. We found that all W ST-11 strains were descendants of an ancestral strain that had undergone unique capsular switching events. The Hajj clone and its descendants were distinct from other W ST-11 strains in that they shared a common antigen gene profile and had undergone recombination involving virulence genes encoding factor H binding protein, nitric oxide reductase, and nitrite reductase. These data demonstrate that recent acquisition of a distinct antigen-encoding gene profile and variations in meningococcal virulence genes was associated with the emergence of the Hajj clone. Importantly, W ST-11 strains unrelated to the Hajj outbreak contribute a significant proportion of W ST-11 cases globally. This study helps illuminate genomic factors associated with meningococcal strain emergence and evolution. PMID:26629539

  16. Cardiogenic shock with ST-segment elevation acute coronary syndrome (ReNa-Shock ST

    Directory of Open Access Journals (Sweden)

    Yanina Castillo Costa

    2017-08-01

    Full Text Available Cardiogenic shock (CS in the setting of an ST-segment elevation myocardial infarction (STEMI is a severe complication and constitutes one of the principal causes of death associated with this condition. The aim of this study was to describe the clinical characteristics, treatment strategies and hospital outcome of CS associated with STEMI in Argentina. The Argentine Registry of Cardiogenic Shock (ReNA-Shock was a prospective and multicenter registry of consecutive patients with CS hospitalized in 64 centers in Argentina between July 2013 and May 2015. Only those with ST-segment elevation myocardial infarction (STEMI were selected for this analysis. Of the 165 patients included in the ReNa-Shock registry, 124 presented STEMI. Median age was 64 years (IQR 25-75: 56.5-75 and 67% were men; median time from symptom onset to admission was 240 minutes (IQR 25-75: 132-720. 63% of the cases presented CS at admission. Eighty-seven percent underwent reperfusion therapy: 80% primary percutaneous intervention with a median door-to-balloon time of 110 minutes (IQR 25-75: 62-184. Inotropic agents were used in 96%; 79% required mechanical ventilation; a Swan Ganz catheter was inserted in 47% and 35% required intra-aortic balloon pumping. Most patients (59% presented multivessel disease (MV. Hospital mortality was 54%. Multivariate analysis identified that time from symptom onset to admission (> 240 min was the only independent predictor of mortality (OR: 3.04; CI 95%: 1.18-7.9. Despite using treatment strategies currently available, morbidity and mortality of STEMI complicated with CS remains high.

  17. GeoTIFF of 3x3 m Bathymetry for St. Thomas & St. John, 2011, UTM 20N NAD83 (NCEI Accession 0131858)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a LiDAR (Light Detection & Ranging) 3x3 meter resolution bathymetric surface for an area of shallow seabed surrounding St. Thomas and St....

  18. Virulence traits associated with Burkholderia cenocepacia ST856 epidemic strain isolated from cystic fibrosis patients

    Directory of Open Access Journals (Sweden)

    Milka Malešević

    2017-06-01

    Full Text Available Abstract Background Burkholderia cenocepacia is considered one of the most problematic cystic fibrosis (CF pathogens. Colonization prevalence in the Serbian CF population is high and virtually exclusively limited to a single highly transmissible clone of B. cenocepacia ST856 which is positive for both the B. cepacia epidemic strain marker (BCESM and cable pilin, and is closely related to the epidemic strain CZ1 (ST32. Methods Biofilm formation for 182 isolates, and adhesion to components of the host extracellular matrix, proteolytic activity, mucoidy and motility of selected ST856 representatives, as well as B. cenocepacia ST858 and ST859, and B. stabilis ST857, novel STs isolated from Serbian CF patients, were investigated in this study. The presence of the cepI, cepR, fliG, llpE, wbiI, and bcscV genes was analyzed. Results Biofilm-formation ability of analyzed strains was poor under standard laboratory conditions, but changed in stress conditions (cold stress and conditions that mimic CF milieu (increased CO2. All strains expressed ability to bind to collagen and fibronectin albeit with different intensity. Representatives of ST856 exhibited gelatinase activity. ST858, ST859 and 9/11 of ST856 genotypes were positive for swimming and twitching motility whereas ST857 was non-motile. Mucoidy was demonstrated in all ST856 genotypes, ST857 was semi-mucoid, and ST858 and ST859 were non-mucoid. Molecular analysis for major virulence factors revealed that ST856 and ST857 carried the six analyzed genes, while ST858 and ST859 were negative for the llpE gene. Conclusion Variations in virulence phenotypes in different genotypes of epidemic B. cenocepacia ST856 clone, in vitro, could be a consequence of diversification driven by pathoadaptation. Diversity of epidemic clone genotypes virulence, could be challenging for accurate diagnosis and treatment, as well as for infection control.

  19. 21st Century Water Conservation Principles

    Science.gov (United States)

    Narayanan, M.

    2013-12-01

    This is an encore presentation of what was presented at the 2012 AGU International Conference. It was entitled: 'The Importance of Water Conservation in the 21st Century.' The poster presentation, however, has been redesigned and reorganized with new, revised perspectives. The importance of water conservation principles has been emphasized. The population of United States has more than doubled over the past 50 years. The need for water however, has tripled. The EPA estimates that more than 36 states face water shortage during the forthcoming years. The EPA has prepared a plan for achieving environmental and energy performance. This will be coupled with leadership and accountability. Carbon neutrality is also of prime importance. The objective is to focus on six important, essential areas. 1. Efficient use of already available energy resources. 2. Intelligent water consumption and focusing on water conservation. 3. Expand the use of renewable energy resources. 4. Explore innovative transportation systems and methodologies. 5. Change building codes and promote high performance sustainable buildings. 6. Focus on developing creative environment management systems. Greenhouse gases such as carbon dioxide occur naturally in the atmosphere. Carbon dioxide is also emitted to the atmosphere through a variety of natural processes and also some human activities. However, fluorinated gases are emitted to the atmosphere solely through human activities, because they are created by humans. It is very important to observe that water conservation is probably the most cost-effective way to reduce our demand for water. Furthermore, it is certainly environmentally justifiable. The Environmental Protection Agency has a plan called E2PLAN. It is EPA's plan for achieving energy and environmental performance, leadership, accountability, and carbon neutrality. In June 2011, the EPA published a comprehensive, multi-year planning document called Strategic Sustainability Performance Plan. The

  20. Drinking games and contextual factors of 21st birthday drinking.

    Science.gov (United States)

    Neighbors, Clayton; Rodriguez, Lindsey M; Rinker, Dipali V; DiBello, Angelo M; Young, Chelsie M; Chen, Chun-Han

    2014-09-01

    21st birthday celebrations are among the highest risks for alcohol use throughout emerging adulthood and celebrants often experience a range of alcohol-related consequences. The present research considered what happens when drinking games are paired with an already high-risk event (i.e., 21st birthday celebrations) and how drinking games compare with other contextual factors on 21st birthdays. Approximately four days after turning 21, 1124 college students (55% women) completed an online survey assessing alcohol use and related consequences experienced during their birthday celebrations. Participants were also asked whether drinking games and other contextual factors were associated with their celebrations. Overall, 18% of participants reported playing drinking games during their 21st birthday celebrations. These individuals reported consuming more alcohol, had higher estimated BACs, and experienced more negative consequences than those who did not play drinking games. The association between playing drinking games and alcohol use and negative consequences was stronger for men. The effect of drinking games on negative consequences was mediated through elevated BAC levels. Receiving bar specials, having drinks purchased, playing drinking games, and loud music were uniquely and significantly associated with all alcohol outcomes. Together, these results suggest that drinking games are part of a larger context of risk contributing to extreme drinking on 21st birthdays. Furthermore, these results will help to facilitate interventions that are more individually tailored to target specific contextual risks, behaviors, and events.

  1. St. Sofia in Ohrid, space, structure, forms: Sources

    Directory of Open Access Journals (Sweden)

    Korać Vojislav

    2008-01-01

    Full Text Available This work comments in particular on studies dealing with the church of St. Sofia in Ohrid. Among them are the monographs of two authors, Barbara Maria Schellewald (Die Arhitektur der Sophien Kirchen in Ohrid, Bon 1986 and Boris Čipan (Sveta Sofija, katedralen hram na ohridskata arhiepiskopija, Skopje 1995. Special attention is devoted to the typological interpretation of St. Sofia, to its initial design as a triple-nave basilica with a dome at the centre. Insightful descriptions are given about the older monuments in the Byzantine capital, Constantinople. Special attention is paid to the external architectonic workmanship. The western façade of St. Sofia demonstrates the features of Late Byzantine architecture, while the eastern façade directly reveals the triple-nave spatial design. That is why this article on St. Sofia contains sketches of the western and the eastern façades, illustrating the features of its architectonic specificities. On the whole, the author presents St. Sofia in Ohrid as a unique work of architecture of the Byzantine region. .

  2. Construction: first of St. Lucie unit 2 successes

    International Nuclear Information System (INIS)

    Conway, W.F.

    1989-01-01

    The Nuclear Regulatory Commission (NRC) granted a full power operating license for St. Lucie Unit 2 on June 10, 1983, just six years after construction began. The industry average for nuclear power plant construction during this time was approximately ten years. The rate of completion had a positive effect on the cost of the facility. The price of the unit was $1.42 billion as compared to the $2 billion to $5 billion range experienced by other utilities for nuclear plants. These accomplishments were not serendipitous but the results of management techniques and personnel attitudes involved in the construction of the unit. More importantly, many of these same techniques and attitudes have now become part of a quality improvement program at St Lucie and are reflected in its performance indicators. This paper analyzes the construction success of St Lucie Unit 2 and demonstrates that excellent performance in the construction phase can be carried over to the operation of a facility

  3. Superconducting poloidal field magnet engineering for the ARIES-ST

    International Nuclear Information System (INIS)

    Bromberg, Leslie; Pourrahimi, S.; Schultz, J.H.; Titus, P.; Jardin, S.; Kessel, C.; Reiersen, W.

    2003-01-01

    The critical issues of the poloidal systems for the ARIES-ST design have been presented in this paper. Because of the large plasma current and the need of highly shaped plasmas, the poloidal field (PF) coils should be located inside the toroidal field in order to reduce their current. Even then, the divertor coils carry large currents. The ARIES-ST PF coils are superconducting using the internally cooled cable-in-conduit conductor. The peak self field in the divertor coils is about 15 T and the highest field in the non-divertor coils is about 6 T. The PF magnets have built-in margins that are sufficient to survive disruptions without quenching. The costing study indicates that the specific cost of the PF system is $80/kg. Detailed design and trade-off studies of ARIES-ST are presented and remaining R and D issues are identified

  4. ST segment elevations: Always a marker of acute myocardial infarction?

    Directory of Open Access Journals (Sweden)

    G. Coppola

    2013-07-01

    Full Text Available Chest pain is one of the chief presenting complaints among patients attending Emergency department. The diagnosis of acute myocardial infarction may be a challenge. Various tools such as anamnesis, blood sample (with evaluation of markers of myocardial necrosis, ultrasound techniques and coronary computed tomography could be useful. However, the interpretation of electrocardiograms of these patients may be a real concern. The earliest manifestations of myocardial ischemia typically interest T waves and ST segment. Despite the high sensitivity, ST segment deviation has however poor specificity since it may be observed in many other cardiac and non-cardiac conditions. Therefore, when ST–T abnormalities are detected the physicians should take into account many other parameters (such as risk factors, symptoms and anamnesis and all the other differential diagnoses. The aim of our review is to overview of the main conditions that may mimic a ST segment Elevation Myocardial Infarction (STEMI.

  5. Three centuries of multi-storied St. Petersburg

    Science.gov (United States)

    Lavrov, Leonid; Perov, Fedor; Eremeeva, Aleksandra; Temnov, Vladimir

    2018-03-01

    The article is devoted to assessment of the role of high-rise buildings in the St. Petersburg historic city's ensemble. Features of formation of city architectural look, the conditions of city typical silhouette's appearance which is characterized by the contrast of a small number of high-rise structures with a low horizontal mass building are observed. The consequences of the emergence of a significant number of great height buildings, the silhouette of which conflicts with the traditional St. Petersburg landscape's compositional principles, are analyzed. The economic reasons of high-rise construction of residential and office buildings are given. The conclusions about the prospects of St. Petersburg high-rise construction in the light of city-building and economic factors are made.

  6. At stå i det åbne

    DEFF Research Database (Denmark)

    Hansen, Finn Thorbjørn

    Bogen At stå i det åbne: Dannelse gennem filosofisk undren og nævær er en pædagogisk-filosofisk undersøgelse af, hvad det vil sige at stå i et "undringsfællesskab" i en undervisnings- og vejledningssituation. Ved at trække på den eksistentiel-fænomenologiske og filosofisk-hermeneutiske forskning ...... "levet erfaring" fra mange år som filosofisk vejleder viser og argumenterer Finn Thorbjørn Hansen for, at den filosofiske undren kan være en vej til en større forståelse for den eksistentielle og dannelsesmæssige dimension i vejledning og undervisning inden for især professions- og...

  7. Geology of St. John, U.S. Virgin Islands

    Science.gov (United States)

    Rankin, Douglas W.

    2002-01-01

    The rocks of St. John, which is located near the eastern end of the Greater Antilles and near the northeastern corner of the Caribbean plate, consist of Cretaceous basalt, andesite, keratophyre, their volcaniclastic and hypabyssal intrusive equivalents, and minor calcareous rocks and chert. These rocks were intruded by Tertiary mafic dikes and tonalitic plutons. The oldest rocks formed in an extensional oceanic environment characterized by abundant keratophyre and sheeted dikes. Subduction-related volcanism of the east-west-trending marine Greater Antilles volcanic arc began on St. John near the transition between the Early and Late Cretaceous. South-directed compression, probably caused by the initial collision between the Greater Antilles arc of the Caribbean plate and the Bahama platform of the North American plate, deformed the Cretaceous strata into east-west-trending folds with axial-plane cleavage. Late Eocene tonalitic intrusions, part of the Greater Antilles arc magmatism, produced a contact aureole that is as much as two kilometers wide and that partly annealed the axial-plane cleavage. East-west compression, possibly related to the relative eastward transport of the Caribbean plate in response to the beginning of spreading at the Cayman Trough, produced long-wavelength, low-amplitude folds whose axes plunge gently north and warp the earlier folds. A broad north-plunging syncline-anticline pair occupies most of St. John. The last tectonic event affecting St. John is recorded by a series of post-late Eocene sinistral strike-slip faults related to the early stages of spreading at the Cayman Trough spreading center and sinistral strike-slip accommodation near the northern border of the Caribbean plate. Central St. John is occupied by a rhomb horst bounded by two of these sinistral faults. Unlike other parts of the Greater Antilles, evidence for recent tectonic movement has not been observed on St. John.

  8. Kotiuttamisprosessi hoitohenkilöstön kokemana Keuruun vuodeosastolla

    OpenAIRE

    Santala, Noora

    2011-01-01

    Opinnäytetyön aihe kotiuttamisprosessista hoitohenkilöstön kokemana oli työelämälähtöinen ja aihe sovittiin yhteistyössä vuodeosaston osastonhoitajan kanssa. Tarkoituksena oli selvittää hoitohenkilöstön näkemyksiä kotiuttamisprosessista sekä selventää kotiutushoitajan toimenkuvaa toiminnan vaikuttavuutta. Opinnäytetyö tehtiin laadullisena eli kvalitatiivisena tutkimuksena. Opinnäytetyön aineisto kerättiin teemahaastattelujen avulla marraskuussa 2011 ja se koostui vuodeosaston kotiutushoitajan...

  9. Imaging QRS complex and ST segment in myocardial infarction

    DEFF Research Database (Denmark)

    Bacharova, Ljuba; Bang, Lia E; Szathmary, Vavrinec

    2014-01-01

    BACKGROUND: Acute myocardial infarction creates regions of altered electrical properties of myocardium resulting in typical QRS patterns (pathological Q waves) and ST segment deviations observed in leads related to the MI location. The aim of this study was to present a graphical method for imaging...... of the instantaneous QRS vectors, and the estimated "myocardium at risk" based on the ST segment deviation. RESULTS: The images are presented as Mercator projections with the texture of anatomical segments of the heart and the corresponding coronary artery distribution. The changes in depolarization sequence were...

  10. Spolia from the Church of St. Nicholas in Nikoljac

    Directory of Open Access Journals (Sweden)

    Pejić Svetlana

    2012-01-01

    Full Text Available Two, so far unknown, spolia with carved interlace ornaments, built into the wall of the Church of St. Nicholas in Nikoljac are analyzed. These spolia are a part of the collection of fragments discovered earlier in the Church of St. Peter in Bijelo Polje. A comparative analysis was performed on a multitude of pre-Romanic material, in order to determine the time when they were made and whether they originated from any specific circle of stonemasons, and also to identify the initial position of the fragments in the liturgical church furniture for which they had been carved. [Projekat Ministarstva nauke Republike Srbije, br. 177036

  11. Performance Evaluation and Opportunity Assessment for St. Bernard Project

    Energy Technology Data Exchange (ETDEWEB)

    Dickson, B.

    2011-06-01

    This report describes efforts by IBACOS, a Department of Energy Building America research team, in the St. Bernard Project, a nonprofit, community-based organization whose mission is to assist Hurricane Katrina survivors return to their homes in the New Orleans area. The report focuses on energy modeling results of two plans that the St. Bernard Project put forth as 'typical' building types and on quality issues that were observed during the field walk and Best Practice recommendations that could improve the energy efficiency and durability of the renovated homes.

  12. Performance Evaluation and Opportunity Assessment for St. Bernard Project

    Energy Technology Data Exchange (ETDEWEB)

    Dickson, Bruce [IBACOS, Inc., Pittsburgh, PA (United States)

    2011-06-01

    This report describes efforts by IBACOS, a Building America research team, in the St. Bernard Project, a nonprofit, community-based organization whose mission is to assist Hurricane Katrina survivors to return to their homes in the New Orleans area. The report focuses on energy modeling results of two plans that the St. Bernard Project put forth as 'typical' building types and on quality issues that were observed during the field walk and best practice recommendations that could improve the energy efficiency and durability of the renovated homes.

  13. 21st Century Power Partnership: September 2016 Fellowship Report

    Energy Technology Data Exchange (ETDEWEB)

    Reber, Timothy J. [National Renewable Energy Lab. (NREL), Golden, CO (United States); Rambau, Prudence [Eskom, Pretoria (South Africa); Mdhluli, Sipho [Eskom, Pretoria (South Africa)

    2017-09-29

    This report details the 21st Century Power Partnership fellowship from September 2016. This Fellowship is a follow-up to the Technical Audit of Eskom's Medium- and Long-term Modelling Capabilities, conducted by U.S. National Renewable Energy Laboratory (NREL) in April 2016. The prospect and role of variable renewable energy (vRE) in South Africa poses new modelling-related challenges that Eskom is actively working to address by improving the fidelity of PLEXOS LT and ST models.

  14. Construction experience on PCRV liners at Fort St. Vrain

    International Nuclear Information System (INIS)

    Cliff, J.O.; Wunderlich, R.G.

    1976-01-01

    The construction of the steel liners for the Fort St. Vrain prestressed concrete reactor vessel presented many unique problems for which techniques were developed to satisfy the rigid specification requirements. The PCRV cavity liner was fabricated from 1.9cm carbon steel plate. The liners were partially fabricated by Pittsburgh-Des Moines Steel Company at their Pittsburgh manufacturing facility. The liners were then shipped by rail to within approximately five miles of the jobsite and then trucked the remaining distance. The construction techniques, dimensional control, concrete support and testing utilized on the Fort St. Vrain project are presented in detail and demonstrate the flexibility of the PCRV for field construction. (author)

  15. ST changes before and during primary percutaneous coronary intervention predict final infarct size in patients with ST elevation myocardial infarction

    DEFF Research Database (Denmark)

    Terkelsen, Christian Juhl; Kaltoft, Anne Kjer; Nørgaard, Bjarne Linde

    2008-01-01

    : The purpose of the study was to evaluate whether preprocedural and periprocedural ST changes predict final infarct size (IS) in STEMI patients treated with primary percutaneous coronary intervention (primary PCI). METHODS: Twelve-lead electrocardiograms (ECGs) were acquired in the prehospital phase...... and on admission in 200 STEMI patients transferred for primary PCI. Continuous ST monitoring was performed during and 90 minutes after primary PCI. The exact timing of interventional procedures and the resulting thrombolysis in myocardial infarction (TIMI) flow were registered. A 1-month single-photon emission...... and periprocedural ECG findings and routine angiography findings, spontSTR was associated with smaller IS (B = -8.6%; P

  16. Orthophoto Mosaic (2012) for Coral Bay, St. John

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This 0.3x0.3 meter imagery mosaic of Coral Bay, St. John in the U.S. Virgin Islands was created by the National Oceanic and Atmospheric Administration (NOAA) using a...

  17. Technology Enhanced Formative Assessment for 21st Century Learning

    Science.gov (United States)

    Spector, J. Michael; Ifenthaler, Dirk; Sampson, Demetrios; Yang, Lan; Mukama, Evode; Warusavitarana, Amali; Dona, Kulari Lokuge; Eichhorn, Koos; Fluck, Andrew; Huang, Ronghuai; Bridges, Susan; Lu, Jiingyan; Ren, Youqun; Gui, Xiaoqing; Deneen, Christopher C.; San Diego, Jonathan; Gibson, David C.

    2016-01-01

    This paper is based on the deliberations of the Assessment Working Group at EDUsummIT 2015 in Bangkok, Thailand. All of the members of Thematic Working Group 5 (TWG5) have contributed to this synthesis of potentials, concerns and issues with regard to the role of technology in assessment as, for and of learning in the 21st century. The group…

  18. Laser stimulation of the acupoint 'Zusanli' (ST.36) on the ...

    Indian Academy of Sciences (India)

    2016-02-13

    Feb 13, 2016 ... point (a sensation such as heaviness, an electrical current, or a 'Deqi' sensation) is necessary. The action mechanism related to the stimulation of the. ST.36 in LA in the thyroid in not fully understood, such as the influence of the stomach meridian that passes close to the thyroid (figure 2). Nevertheless, this ...

  19. Resource scarcity in the 21st century: conflict or cooperation?

    NARCIS (Netherlands)

    Qasem, I.

    2010-01-01

    Oil and natural gas, water, food, and minerals are critical to ensuring our wellbeing and prosperity. The mismatch between future demand and supply is crystallizing into one of the most complex and urgent issues policymakers will face in the 21st Century. Unless the challenges arising from these

  20. Logistique ST-HM pour le projet LHC

    CERN Document Server

    Prodon, S

    2002-01-01

    Ce papier a pour objectif de présenter la structure mise en place au sein du groupe ST-HM pour assurer la logistique d'installation du projet LHC. L'aspect traèabilité sera tout d'abord évoqué avec notamment la mise en place d'outils informatiques tels que le formulaire EDH de demande d'intervention transport-manutention et le système SIRIAC de suivi et de validation des transports réalisés. Ces développements informatiques s'intègrent dans le cadre plus général des modalités de traèabilité des équipements établies en collaboration avec le groupe SL/MR, chargé de la gestion des espaces pour le projet LHC. Les procédures proprement dites de transport des équipements feront l'objet d'un développement particulier. Leur processus d'élaboration sera détaillé : des premières réunions d'information jusqu'à la validation finale par les trois parties (demandeur, groupe ST-HM et contractant ST-HM). L'intégration de ces documents dans la logistique générale ST-HM de planification des ressou...

  1. Market Reforms and the Central City: Moscow and St. Petersburg

    NARCIS (Netherlands)

    J.H. Bater (James)

    2003-01-01

    textabstractCentral Moscow and St Petersburg have undergoing major changes since 1991. Commercialisation is palpable and figures prominently in the local administration's strategies to rebuild the urban economy. Land values are higher in the central city, and this fact of the market economy already

  2. Flora of St Katherine Protectorate: key to families and genera ...

    African Journals Online (AJOL)

    Flora of St Katherine Protectorate: key to families and genera. Wafaa Kamel, Magda Gazar, Samy Zalat, Francis Gilbert. Abstract. Egyptian Journal of Natural History Vol.1 1999: 1-39. Full Text: EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT.

  3. An Institutional Autopsy of St. Augustine Junior College

    Science.gov (United States)

    Lumadue, Richard T.

    2009-01-01

    Institutional autopsies can teach much about why learning centers fail the test of time. St. Augustine Junior College in north Florida, the brainchild of Dr. George Apel, was begun in 1942 and ended seven years later in 1949. The purposes of the short-lived college are identified for discussion in this paper. Also identified are the reasons for…

  4. 101st Sustainment Brigade Supports Operation United Assistance

    Science.gov (United States)

    2016-05-17

    Petty, and Maj. Benjamin Polanco Jr. Capt. Shawn Palmer, a biochemist with the 1st Area Medical Laboratory from Aberdeen Proving Ground, Maryland...I order- ing cycle that resulted in predictable, sustainable, and timely delivery of rations. Operational rations were also stored in a warehouse

  5. 21st Annual Conference of Ramanujan Mathematical Society

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 11; Issue 4. 21st Annual Conference of Ramanujan Mathematical Society. Information and Announcements Volume 11 Issue 4 April 2006 pp 108-108. Fulltext. Click here to view fulltext PDF. Permanent link:

  6. Reformed theology for the 21st century: confessional, contextual and ...

    African Journals Online (AJOL)

    This article scrutinises two important, recently published books on the identity of Reformed theology. These books serve as a springboard for the formation of ideas concerning the way in which Reformed theology should be practised in the 21st century. The article tests the hypothesis that the correct connection and ...

  7. St. George at Prague Castle and Perseus: an Impossible Encounter?

    Czech Academy of Sciences Publication Activity Database

    Bažant, Jan

    2015-01-01

    Roč. 19, 1/2 (2015), s. 189-201 ISSN 1212-5865 Institutional support: RVO:67985955 Keywords : Bellerophon * St. George * iconography * Prague Castle * classical tradition Subject RIV: AB - History http://studiahercynia.ff.cuni.cz/wp-content/uploads/sites/79/2016/05/jan_bazant_189-201.pdf

  8. A Study of the St. Lawrence River Ecological Habitat

    Science.gov (United States)

    Mesires, Maria

    2010-01-01

    Save the River, a grassroots advocacy group established in 1978, lobbies for policies to preserve the upper St. Lawrence River and uses the community's help to keep an eye on the existing habitats. Recently, they procured the Fresh Sound Foundation grant to support the development of new K-12 ecology curricula by local area teachers to educate…

  9. Effects of St. John's wort on irinotecan metabolism

    NARCIS (Netherlands)

    A.H.J. Mathijssen (Ron); J. Verweij (Jaap); P. de Bruijn (Peter); W.J. Loos (Walter); A. Sparreboom (Alex)

    2002-01-01

    textabstractSt. John's wort (SJW), a widely used herbal product, has been implicated in drug interactions resulting from the induced expression of the cytochrome P450 CYP3A4 isoform. In this study, we determined the effect of SJW on the metabolism of irinotecan, a pro-drug of SN-38

  10. New Challenges in 21st-Century Dance Education

    Science.gov (United States)

    Kassing, Gayle

    2010-01-01

    To become competent in today's society, individuals need multiliteracies. The 21st-century dancer needs to be an artist, choreographer, educator, and researcher who can meet challenges and make an impact within the profession, as well as across education, the arts, and society. As dance professionals assess how to utilize their resources better…

  11. Buildings for the 21st Century Newsletter, Fall 2000

    Energy Technology Data Exchange (ETDEWEB)

    Tromly, K.

    2000-10-19

    This issue of Buildings for the 21st Century, a quarterly newsletter on the DOE building programs and technology, highlights the new high-performance visitor center at Zion National Park, Maryland's new Clean Energy Incentive Act, the Ohio State Weatherization Program, the Rebuild America Program and Native American communities joining forces, and Energy Star{reg_sign} clothes washers.

  12. Mount St. Helens 30 years later: a landscape reconfigured.

    Science.gov (United States)

    Rhonda Mazza

    2010-01-01

    On May 18, 1980, after two months of tremors, Mount St. Helens erupted spectacularly and profoundly changed a vast area surrounding the volcano. The north slope of the mountain catastrophically failed, forming the largest landslide witnessed in modern times. The largest lobe of this debris avalanche raced 14 miles down the Toutle River...

  13. Regime Change in North Africa: Possible Implications for 21st ...

    African Journals Online (AJOL)

    At the centre of these debates is the question of “Implications of the Arab Spring on Governance in Africa in the 21st Century”. This Article raises pertinent questions. It revisits the social and economic causes of these regime changes in North Africa; the role of ICT and its social media networks and; the future of repressive ...

  14. Marketing and 21 st Century Technological Challenges: The Need ...

    African Journals Online (AJOL)

    Marketing and 21 st Century Technological Challenges: The Need for Curricula Review. ... Journal of Research in National Development ... Marketing had over the years served the dominant function of bridging the gap between production and consumption through a conceptualized, well structured programme of academic ...

  15. Restructuring through Community Education: The St. Louis Model.

    Science.gov (United States)

    Nance, Everette E.; Windom, John

    1995-01-01

    St. Louis Public Schools established 15 community education centers to provide comprehensive educational services, changing the way administrators and staff operate. The program had to overcome resistance to change, ensure that mission and purpose were understood by all, recognize that change and trust take time, and deal with differences that may…

  16. Fostering 21st Century Skills through Game Design and Development

    Science.gov (United States)

    Garvey, Gregory P.

    2015-01-01

    This reflection paper argues that the design and development of digital games teach essential 21st century skills. Intrinsic to application and game development is design thinking. Design thinking requires iterative development, which demands creativity, critical thinking and problem solving. Students are engaged through learning by doing in both…

  17. Biologically Relevant Exposure Science for 21st Century Toxicity Testing

    Science.gov (United States)

    High visibility efforts in toxicity testing and computational toxicology including the recent NRC report, Toxicity Testing in the 21st Century: a Vision and Strategy (NRC, 2007), raise important research questions and opportunities for the field of exposure science. The authors ...

  18. Developing 21st Century Process Skills through Project Design

    Science.gov (United States)

    Yoo, Jeong-Ju; MacDonald, Nora M.

    2014-01-01

    The goal of this paper is to illustrate how the promotion of 21st Century process skills can be used to enhance student learning and workplace skill development: thinking, problem solving, collaboration, communication, leadership, and management. As an illustrative case, fashion merchandising and design students conducted research for a…

  19. ST2 and Galectin-3 : Ready for Prime Time?

    NARCIS (Netherlands)

    Meijers, Wouter C; van der Velde, A Rogier; de Boer, Rudolf A

    ST2 and galectin-3 are emerging biomarkers in the field of heart failure and have been extensively studied, and that whether they provide additional prognostic value on top of the clinical models and the gold standard in HF, (NT-pro)BNP. Our aim was to provide a comprehensive review of these

  20. St. Ola sõitis Virumaa lipulaevana Soome / Gerli Romanovitsh

    Index Scriptorium Estoniae

    Romanovitš, Gerli, 1977-

    2005-01-01

    Ilmunud ka: Severnoje Poberezhje 10. juuni lk 1,4. Parvlaev St. Ola alustas sõitu Sillamäelt Kotkasse, et viia Ida-Virumaa esindajad Kouvolas toimuvale messile, millest poole võtab enda alla Virumaa väljapanek. Järgmisel aastal käivitub Sillamäe-Kotka regulaarlaevaliin. Ida-Viru maavanema Ago Silde kommentaar

  1. StRoBe: A Classroom-on-Task Measure.

    Science.gov (United States)

    Marchant, Gregory J.

    Researchers as well as others evaluating teachers or programs are often interested in the verbal and non-verbal behaviors related to the learning of students in classrooms. The Student Record of Behavior (StRoBe) is a classroom observation instrument designed to provide simple low inference information concerning student behaviors related to…

  2. Phenology of larval fish in the St. Louis River estuary

    Science.gov (United States)

    Little work has been done on the phenology of fish larvae in Great Lakes coastal wetlands. As part of an aquatic invasive species early detection study, we conducted larval fish surveys in the St. Louis River estuary (SLRE) in 2012 and 2013. Using multiple gears in a spatially ba...

  3. Eruptions of Mount St. Helens : Past, present, and future

    Science.gov (United States)

    Tilling, Robert I.; Topinka, Lyn J.; Swanson, Donald A.

    1990-01-01

    Mount St. Helens, located in southwestern Washington about 50 miles northeast of Portland, Oregon, is one of several lofty volcanic peaks that dominate the Cascade Range of the Pacific Northwest; the range extends from Mount Garibaldi in British Columbia, Canada, to Lassen Peak in northern California. Geologists call Mount St. Helens a composite volcano (or stratovolcano), a term for steepsided, often symmetrical cones constructed of alternating layers of lava flows, ash, and other volcanic debris. Composite volcanoes tend to erupt explosively and pose considerable danger to nearby life and property. In contrast, the gently sloping shield volcanoes, such as those in Hawaii, typically erupt nonexplosively, producing fluid lavas that can flow great distances from the active vents. Although Hawaiian-type eruptions may destroy property, they rarely cause death or injury. Before 1980, snow-capped, gracefully symmetrical Mount St. Helens was known as the "Fujiyama of America." Mount St. Helens, other active Cascade volcanoes, and those of Alaska form the North American segment of the circum-Pacific "Ring of Fire," a notorious zone that produces frequent, often destructive, earthquake and volcanic activity.

  4. Bovine-associated MRSA ST398 in The Netherlands

    Directory of Open Access Journals (Sweden)

    Tavakol Mehri

    2012-05-01

    Full Text Available Abstract During routinely screening (50.000 milk samples on an annual basis 14 MRSA ST398 strains were identified in the period of January 2008 to September 2008 in 14 different dairy herds located in the provinces Overijssel and Gelderland, The Netherlands. Molecular analysis was performed by Cfr9I PFGE, ST398-specific diagnostic PCR, spa typing, SCCmec typing and Panton-Valentine Leukocidin (PVL gene PCR. The molecular analyses of 14 MRSA (one MRSA strain per herd strains revealed that all strains belong to ST398 with 3 closely related spa types (t011, t108 and t889, all commonly found in pigs and carry 2 different SCCmec types, IVa and V. All MRSA strains were resistant to two or more classes of antibiotics and also PVL negative. The majority of farms (n = 9, 64% harboured combined livestock with both cows and pigs present. Our study contributes to the growing evidence that MRSA ST398 is transmitted among various animal species and can be considered as an etiological agent of mastitis in dairy cows.

  5. A 3000 yr paleostorm record from St. Catherines Island, Georgia

    Science.gov (United States)

    Braun, Erick; Meyer, Brian; Deocampo, Daniel; Kiage, Lawrence M.

    2017-09-01

    Tropical cyclones (hurricanes in the northern hemisphere) are amongst the most devastating of the world's natural disasters and cause billions of dollars in damage every year. Data on the likelihood of a coastal site being struck by a major hurricane strike can potentially aid in planning and mitigation efforts that could save money and lives. However, forecasting requires data that are currently insufficient for the Georgia Bight. This study provides information to enhance the paleohurricane record by analysis of a 467 cm thick vibracore raised from St. Catherines Island, GA. Sediment geochemistry and foraminiferal assemblages indicate deposits attributable to seven paleohurricane events, five of which were likely major hurricanes when they made landfall on St. Catherines. Magnitudes were estimated by comparison to the overwash deposit left by ;The Sea Islands hurricane of 1893;, a major hurricane recorded by the recent sediment of St. Catherines Island. The St. Catherines record also shows a change in the activity levels on the Georgia coast with two distinct activity regimes over the past 3000 years.

  6. St Helena Bay (southern Benguela) then and now: muted climate ...

    African Journals Online (AJOL)

    Conservation measures, implemented to reverse past negative human impact, have benefitted marine mammals, the abundance of which has increased in the area, but additional conservation measures are necessary to reverse the decline in African penguins Spheniscus demersus. St Helena Bay shows a muted ...

  7. n „biblisch-theologischeSt udie” wat opnuut ogv

    African Journals Online (AJOL)

    Test

    Hans Bietenhard, Das tausendjahrige Reich, Zwingli-Verlag Zürich. (1955?), 174 bladsye. Ons het in die boek van Bietenhard 'n „biblisch-theologischeSt udie” wat opnuut o.g.v. 'n grondige wetenskaplike eksegese van Op. 19 en 20, verskillende aspekte van die s.g. „duisendjarige Ryk” wil ondersoek. (bis. 9).

  8. New St-chromosome-specific molecular markers for identifying ...

    Indian Academy of Sciences (India)

    specific marker. St-specific markers for wheat–Th. intermedium introgression lines. An introgression line Z148 was selected from the progeny of hybrid between wheat and wheat–Th. intermedium ssp. trichorophrum partial amphiploid (Yang et al. 2006). The chromosome constitution of Z148 was determined using the.

  9. 21st European Congress of Obstetrics and Gynaecology

    DEFF Research Database (Denmark)

    Hornnes, Peter

    2010-01-01

    The 21st European Congress of Obstetrics and Gynaecology took place in Antwerp 5-8 May 2010. The congress provided the participants with an overview of recent scientific and clinical developments throughout the field of obstetrics and gynaecology, and these are summarized in this article....

  10. Korrosionsegenskaber af lasersvejste emner i rustfast stål

    DEFF Research Database (Denmark)

    Juhl, Thomas Winther; Jensen, Søren Aakjær

    1999-01-01

    korrosionsegenskaberne af lasersvejste rustfaste stål. Der beskrives metoder og deres anvendelighed, samt resultaterne for de for-skellige metoder og svejseparametre.Der er blevet fundet en meget begrænset indflydelse på den potential-uafhægige og poten-tial-afhængige CPT, ved lasersvejsning af AISI 316. Ved...

  11. Department of Energy: Nuclear S&T workforce development programs

    Energy Technology Data Exchange (ETDEWEB)

    Bingham, Michelle [Idaho National Lab. (INL), Idaho Falls, ID (United States); Bala, Marsha [Idaho National Lab. (INL), Idaho Falls, ID (United States); Beierschmitt, Kelly [Idaho National Lab. (INL), Idaho Falls, ID (United States); Steele, Carolyn [Argonne National Lab. (ANL), Argonne, IL (United States); Sattelberger, Alfred P. [Argonne National Lab. (ANL), Argonne, IL (United States); Bruozas, Meridith A. [Argonne National Lab. (ANL), Argonne, IL (United States)

    2016-01-01

    The U.S. Department of Energy (DOE) national laboratories use their expertise in nuclear science and technology (S&T) to support a robust national nuclear S&T enterprise from the ground up. Traditional academic programs do not provide all the elements necessary to develop this expertise, so the DOE has initiated a number of supplemental programs to develop and support the nuclear S&T workforce pipeline. This document catalogs existing workforce development programs that are supported by a number of DOE offices (such as the Offices of Nuclear Energy, Science, Energy Efficiency, and Environmental Management), and by the National Nuclear Security Administration (NNSA) and the Naval Reactor Program. Workforce development programs in nuclear S&T administered through the Department of Homeland Security, the Nuclear Regulatory Commission, and the Department of Defense are also included. The information about these programs, which is cataloged below, is drawn from the program websites. Some programs, such as the Minority Serving Institutes Partnership Programs (MSIPPs) are available through more than one DOE office, so they appear in more than one section of this document.

  12. Arts and Leisure Activities in the St. Louis Region.

    Science.gov (United States)

    Crowther, Betty; Kahn, Alfred

    1983-01-01

    Factor analysis of a 1978 survey of St. Louis shows that different age, race, and educational attainment segments have approximately the same patterns of interest, participation, and enjoyment in leisure activities. Leisure activities of four types of fine arts activities--arts, music-dance, visual arts, and nonarts types--are described.…

  13. Watershed management in the 21st Century: National perspectives

    Science.gov (United States)

    Carolyn Adams; Tom Noonan; Bruce Newton

    2000-01-01

    Watersheds will continue to be planning management units of choice during the 21st century. Historic precedent, contemporary beliefs, regulation, and broad institutional support have insured their future. Whether their use will result in more sustainable systems depends on keeping natural resource issues a high national priority, balancing competition for consumptive...

  14. Principal Component Surface (2011) for Fish Bay, St. John

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a 0.3x0.3 meter principal component analysis (PCA) surface for areas inside Fish Bay, St. John in the U.S. Virgin Islands (USVI). It was...

  15. A computer controlled pulse penerator for an ST Radar System ...

    African Journals Online (AJOL)

    A computer controlled pulse genarator for an ST radar system is described. It uses a highly flexible software and a hardware with a small IC count, making the system compact and highly programmable. The parameters of the signals of the pulse generator are initially entered from the keyboard. The computer then generates ...

  16. Museum of Historic St. Augustine--Government House. Teacher's Guide.

    Science.gov (United States)

    VanVleet, Susan; Spikes, Tracy

    This booklet is designed to assist teachers in guiding students through the Museum of Historic St. Augustine (Government House) exhibit, "The Dream, The Challenge, The City." The exhibit and learning activities explore cultural, economic, and architectural development from the 1565 Spanish settlement to the Flagler Era of the 1880s and…

  17. St. Augustine's Abbey Canterbury: A Resource Book for Teachers.

    Science.gov (United States)

    Scoffham, Stephen

    This resource book is for teachers in England who would like to visit St. Augustine's Abbey with their students. The first part consists of background information, documents, and advice on how to plan and prepare for the visit. The second part is aimed at pupils aged 9 years and over. It includes a trail of the site, a set of classwork sheets and…

  18. Science Academies' 91st Refresher Course on Innovations in ...

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 22; Issue 7. Science Academies' 91st Refresher Course on Innovations in Genetics and Plant Breeding with Special Reference to Biotic and Abiotic Stress. Information and Announcements Volume 22 Issue 7 July 2017 pp 717-717 ...

  19. [Prolegomenon of the Czech pharmacognosy: 21st century].

    Science.gov (United States)

    Opletal, Lubomír

    2013-04-01

    The paper analyzes the basic features of the development of pharmacognosy as the oldest profile subject of pharmacy primarily in Europe during the 20th century. Historical consequences of its development are declared, which should create the basis for its embedment, new content and tasks in Czech pharmacy of the 21st century, especially in education at Czech universities.

  20. Teaching with Autoharps in the 21st Century

    Science.gov (United States)

    Birnie, Rebecca A.

    2014-01-01

    The excitement of playing an instrument is one of the greatest motivating forces in teaching general music to students. The autoharp, which may be long forgotten in the general music classrooms of the 21st century, is an ideal instrument to "re-introduce" to students. The teaching of a traditional folk instrument provides advantages for…

  1. (HIV) INFECTION AMONG ANTENATAL CLINIC ATTENDEES IN St ...

    African Journals Online (AJOL)

    DJFLEX

    The prevalence of human immunodeficiency virus (HIV) infection was estimated among pregnant women attending clinic at St. ... percentage prevalence by educational status was: women with no formal education 37.5%; those with secondary education, 11.3% and ..... 81% at age 18. These young married girls lack proper.

  2. Essentials for Engaged 21st-Century Students

    Science.gov (United States)

    Jones, Virginia R.

    2012-01-01

    The Millennial Generation is a subject of paramount interest for 21st-century educators. It is a generation unlike its predecessors, with some stating it is the most intelligent consumer generation in history. Experts in the fields of neurobiology and psychology have found that Millennial brains may actually be "physically different" because of…

  3. Curriculum Development: Producing "Geographers" for the 21st Century

    Science.gov (United States)

    Whalley, W. Brian; Saunders, Angharad; Lewis, Robin A.; Buenemann, Michaela; Sutton, Paul C.

    2011-01-01

    We take a fresh look at geography curricula and their appropriateness to the demands of the 21st century. We reflect on the purpose, content and relevance of undergraduate geography curricula in an age of "supercomplexity". Geography curricula, by their nature, are varied and multiple, with different countries often privileging different…

  4. Upholding humanity: challenges of peace in the 21st century

    NARCIS (Netherlands)

    Gaay Fortman, B. de

    2000-01-01

    In this presentation we shall, first of all, explore the background to the topic for today as formulated by the organisers: Peace in the 21st century: between the supranational and the grassroots. From there some remarks will follow on the meaning of commemoration and liberation by giving you a very

  5. Rediscovering Substance of Soul in 21st Century Middle Schools

    Science.gov (United States)

    Tyson, Tim

    2009-01-01

    Middle schools take on a higher purpose by making every effort to empower all of their students to attain their highest potential. This article rediscovers the "substance of soul" in the 21st century middle schools. The author stresses that returning to one's substance of soul goes beyond merely revisiting what educators truly value and then…

  6. St Paul on Soul, Spirit and the Inner Man

    NARCIS (Netherlands)

    van Kooten, G.H.; Elkaisy-Friemuth, M.; Dillon, J.M.

    2009-01-01

    George H. van Kooten, “St Paul on Soul, Spirit and the Inner Man,” in The Afterlife of the Platonic Soul: Reflections on Platonic Psychology in the Monotheistic Religions (ed. Maha Elkaisy-Friemuth and John M. Dillon; Ancient Mediterranean and Medieval Texts and Contexts: Studies in Platonism,

  7. Short Communication A near mass stranding of cetaceans in St ...

    African Journals Online (AJOL)

    A group of 70 false killer whales Pseudorca crassidens and 124 bottlenose dolphins Tursiops sp., and a separate group of 13 Risso's dolphins Grampus griseus, assembled close inshore off a known mass-stranding site in St Helena Bay, South Africa, in October 2003. However, only a single Risso's dolphin attempted to ...

  8. Information and Announcements Science Academies 81st Refresher ...

    Indian Academy of Sciences (India)

    IAS Admin

    2016-09-25

    Sep 25, 2016 ... ANN. RESONANCE | September 2016. Information and Announcements. Science Academies 81st Refresher Course on. Experimental Physics. 3–18, November 2016. Goa University, Goa. A Refresher Course in Experimental Physics will be held at Goa University, Goa from 03 to 18 November 2016 for.

  9. Bringing Foreign Language Learning into the 21st century | Thomas ...

    African Journals Online (AJOL)

    Bringing Foreign Language Learning into the 21st Century. The different challenges facing foreign language lecturers are considered as well as the different methods used to teach a foreign language. Technology and multimedia are proposed not only as tools and supports but also as a possible solution. With the change ...

  10. Celebrating St. Patrick's Day: Students' Expectations, Intent, and Behavior.

    Science.gov (United States)

    Henslee, Amber M; Irons, Jessica G; Bonn-Miller, Marcel O

    2016-01-01

    College students engage in risky alcohol use within a variety of contexts, including specific celebratory events. Student intentions and peer perceptions predict alcohol use; however, how these factors affect specific celebratory drinking may vary from typical alcohol use. The current study sought to better understand event-specific drinking among college students during St. Patrick's Day, as compared to Spring Break. Undergraduate students (N = 82) at a campus with a unique traditional celebration of St. Patrick's Day were surveyed. At Time 1, participants were asked to indicate how much alcohol they intended to drink and how much alcohol they expected other students to drink during St. Patrick's Day and Spring Break. At Time 2, students reported on actual alcohol consumption during both events. Results indicated that participants reported greater intent to consume, expectation of peer consumption, and actual alcohol consumption during St. Patrick's Day as compared to Spring Break. Neither sensation seeking nor impulsivity predicted alcohol use during either event. Findings are discussed in the context of understanding, preventing, and intervening with event-specific drinking among college students.

  11. RESTAURANT AND CAFETERIA SERVICES ARRANGEMENTS FOR MAY 1ST, 2001

    CERN Multimedia

    Restaurant Supervisory Committee

    2001-01-01

    1. Restaurants As Tuesday, May 1st, is an official CERN holiday, restaurants no 2 (DSR : Bldg. 504 - Meyrin) and no 3 (Avenance : Bldg. 866 - Prévessin) will be closed as from Monday, April 30 at 18h00. They will reopen on Wednesday, May 2nd at 6h30 (rest. no 2) and at 7h00 (rest. no 3). On May 1st, a limited service will be provided by restaurant no. 1 (COOP : Bldg. 501 - Meyrin) from 8h00 to 21h00 with hot meals served from 11h30 to 14h00 and from 18h00 to 19h30. 2. Satellite cafétérias All satellite cafétérias will be closed on May 1st. They will all operate normally on Monday, April 30, except for buildings 17 (Meyrin), 865 and 892 (Prévessin) which will be closed. 3. Newspaper stand The newspaper kiosque in building 501 will be closed on May 1st.

  12. Orthophoto Mosaic (2012) for Fish Bay, St. John

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This 0.3x0.3 meter imagery mosaic of Fish Bay, St. John in the U.S. Virgin Islands was created by the National Oceanic and Atmospheric Administration (NOAA) using a...

  13. 1st International Workshop on Learning Analytics and Linked Data

    NARCIS (Netherlands)

    Drachsler, Hendrik; Dietze, Stefan; Greller, Wolfgang; D'Aquin, Mathieu; Jovanovich, Jelena; Pardo, Abelardo; Reinhardt, Wolfgang; Verbert, Katrien

    2012-01-01

    Drachsler, H., Dietze, S., Greller, W., D'Aquin, M., Jovanovic, J., Pardo, A., Reinhardt, W., & Verbert, K. (2012). 1st International Workshop on Learning Analytics and Linked Data. In S. Dawson, C. Haythornthwaite, S. Buckingham Shum, D. Gasevic, & R. Fergusson (Eds.), LAK '12 Proceedings of the

  14. Pulmonary embolism presenting with ST segment elevation in inferior leads

    Directory of Open Access Journals (Sweden)

    Muzaffer Kahyaoğlu

    2017-03-01

    Full Text Available Acute pulmonary embolism is a form of venous thromboembolism that is widespread and sometimes mortal. The clinical presentation of pulmonary embolism is variable and often nonspecific making the diagnosis challenging. In this report, we present a case of pulmonary embolism characterized by ST segment elevation in inferior leads without reciprocal changes in the electrocardiogram.

  15. Wanted for 21st Century Schools: Renaissance STEM Teacher Preferred

    Science.gov (United States)

    Ames, Tyler; Reeve, Edward; Stewardson, Gary; Lott, Kimberly

    2017-01-01

    As education seeks to mold itself to fit the demands of the 21st century, STEM education will continue to be an important consideration. The integrated and crosscutting nature of STEM is incorporated into the "Next Generation Science Standards" in which engineering design is raised to the same level as scientific inquiry and is expected…

  16. Monitoring birds, reptiles and butterflies in the St Katherine ...

    African Journals Online (AJOL)

    Fifty-two bird species were recorded during transect and point count surveys of wadis in the St. Katherine Protectorate in the mountainous southern region of the Sinai, Egypt. Two species are new to Egypt: Rock Nuthatch (Sitta neumeyer) and Rock Sparrow (Petronia petronia). There were several other notable species: ...

  17. Vegetation and Grazing in the St. Katherine Protectorate, South ...

    African Journals Online (AJOL)

    Plants were surveyed in the St. Katherine Protectorate of South Sinai, Egypt. The most frequently recorded plant species include: Artemisia herba-alba, Artemisia judaica, Fagonia arabica, Fagonia mollis, Schismus barbatus, Stachys aegyptiaca, Tanacetum sinaicum, Teucrium polium and Zilla spinosa. Dominant plant ...

  18. Clinical implications of ST segment time-course recovery patterns ...

    African Journals Online (AJOL)

    Arun Kumar Agnihotri

    KEY WORDS: Exercise stress test; ST segment time course patterns. INTRODUCTIONᴪ. The diagnosis of angina is made on the grounds of typical pain and its relationship to effort and rest. Clinical assessment to determine whether chest pain is of ischemic origin (angina) is often ambiguous when a history of angina is ...

  19. Principal Component Surface (2011) for Coral Bay, St. John

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a 0.3x0.3 meter principal component analysis (PCA) surface for areas inside Coral Bay, St. John in the U.S. Virgin Islands (USVI). It was...

  20. Volcano ecology: flourishing on the flanks of Mount St. Helens

    Science.gov (United States)

    Rhonda Mazza; Charlie Crisafulli

    2016-01-01

    Mount St. Helens’ explosive eruption on May 18, 1980, was a pivotal moment in the field of disturbance ecology. The subsequent sustained, integrated research effort has shaped the development of volcano ecology, an emerging field of focused research. Excessive heat, burial, and impact force are some of the disturbance mechanisms following an eruption. They are also...

  1. Healing the Wounds: St. Augustine, Catechesis, and Religious Education Today

    Science.gov (United States)

    Franchi, Leonardo

    2011-01-01

    St. Augustine of Hippos' writing on education offers a fresh lens through which the conceptual framework of religious education in the Catholic school can be understood. Recent teaching of the Magisterium of the Catholic Church on the distinctive nature of religious education and catechesis has challenged religious educators to find an alternative…

  2. 33 CFR 117.651 - St. Joseph River.

    Science.gov (United States)

    2010-07-01

    ... US33 (Blossomland) bridge, mile 0.9, and the BL-94 (Bicentennial) bridge, mile 1.3, both at St. Joseph...-quarter hour. (c) From December 16 through the last day of February, the draw of both bridges shall open...

  3. Cyberbullying and Sexting: Technology Abuses of the 21st Century

    Science.gov (United States)

    Siegle, Del

    2010-01-01

    Many young people cannot remember a time before Instant Messaging (IM), cell phone text messaging, video conferencing, blogging, e-mailing, and MySpace and Facebook postings existed. Thanks to the ubiquitous nature of technology in the 21st century, digital natives are accustomed to seeing, and being seen, on a scale that was unimaginable by their…

  4. 21st centuries skill implication on educational system

    Science.gov (United States)

    Wrahatnolo, T.; Munoto

    2018-01-01

    The purpose of this article is to identify skill needed in 21st centuries and its implication on Indonesia’s educational system. This research found that the 21st centuries skill application has more measurable benefits in some sections of life, such as critical thinking and problem solving, initiative, creativity, and entrepreneurship, communication, teamwork, metacognition (change of mindset), digital literature. This study applied qualitative data analysis. The data were taken from different sources and literature. The analysis showed that The 21st centuries education concept’s implementation can be applied in the curriculum of the required subject that is addressed to achieve learning and innovation skills competence and also technology and information media skills competence. While supporting subject group directed to achieve life and career skills competence. All subjects are the derivation from core subject 3R, which are reading, writing, and arithmetic. Based on the description above, it can be concluded that 21st centuries skill needs; (1) a life planning; (2) flexibility and adaptability; (3) initiative and self-management (4) entrepreneurship; (5) social and cultural interaction; (6) productivity and accountability; (7) leadership; (8) critical thinking, (9) problem solving; (10) communication; (11) collaboration and teamwork; (12) lifelong learning; and (13) digital literation.

  5. Developing 21st Century Chemistry Learning through Designing Digital Games

    Science.gov (United States)

    Lay, Ah-Nam; Osman, Kamisah

    2018-01-01

    The purpose of this study is to investigate the effect of Malaysian "Kimia" (Chemistry) Digital Games (MyKimDG) module on students' achievement and motivation in chemistry as well as 21st century skills. Chemistry education in Malaysia should put greater emphasis on combination of cognitive, sociocultural and motivational aspects to…

  6. Emerging: Negotiating Identity in a 21st Century American Seminary

    Science.gov (United States)

    Shafer, Peter W.

    2010-01-01

    "Emerging: Negotiating Identity in a 21st Century American Seminary" is an ethnographic investigation involving a diverse group of students as they experience their first year of graduate-level theological education at a Protestant seminary in the United States. The study analyzes the observations and student interviews that form the core of the…

  7. 21 st century librarians and effective information service delivery ...

    African Journals Online (AJOL)

    It further explores emerging trends in information provision which can be employed by 21st century librarians to reposition the academic library for effective service delivery. Lack of competency, lack of technology literacy and inadequate power supply were highlighted as some of the challenges that hinder effective service ...

  8. Connecting the Digital Dots: Literacy of the 21st Century

    Science.gov (United States)

    Jones-Kavalier, Barbara R.; Flannigan, Suzanne L.

    2006-01-01

    Prior to the 21st century, "literate" defined a person's ability to read and write, separating the educated from the uneducated. With the advent of a new millennium and the rapidity with which technology has changed society, the concept of literacy has assumed new meanings. Experts in the field suggest that the current generation of…

  9. Economic and Financial Education for the 21st Century

    Science.gov (United States)

    Schug, Mark; Lopus, Jane

    2008-01-01

    The Partnership for 21st Century Skills places an important emphasis on fundamental social science subjects including history, geography, government and civics, and economics as well as a stress on other important subjects such as English, foreign languages, arts, and science in the school curriculum. It has also identified what it calls 21st…

  10. Transformations in Air Transportation Systems For the 21st Century

    Science.gov (United States)

    Holmes, Bruce J.

    2004-01-01

    Globally, our transportation systems face increasingly discomforting realities: certain of the legacy air and ground infrastructures of the 20th century will not satisfy our 21st century mobility needs. The consequence of inaction is diminished quality of life and economic opportunity for those nations unable to transform from the 20th to 21st century systems. Clearly, new thinking is required regarding business models that cater to consumers value of time, airspace architectures that enable those new business models, and technology strategies for innovating at the system-of-networks level. This lecture proposes a structured way of thinking about transformation from the legacy systems of the 20th century toward new systems for the 21st century. The comparison and contrast between the legacy systems of the 20th century and the transformed systems of the 21st century provides insights into the structure of transformation of air transportation. Where the legacy systems tend to be analog (versus digital), centralized (versus distributed), and scheduled (versus on-demand) for example, transformed 21st century systems become capable of scalability through technological, business, and policy innovations. Where air mobility in our legacy systems of the 20th century brought economic opportunity and quality of life to large service markets, transformed air mobility of the 21st century becomes more equitable available to ever-thinner and widely distributed populations. Several technological developments in the traditional aircraft disciplines as well as in communication, navigation, surveillance and information systems create new foundations for 21st thinking about air transportation. One of the technological developments of importance arises from complexity science and modern network theory. Scale-free (i.e., scalable) networks represent a promising concept space for modeling airspace system architectures, and for assessing network performance in terms of robustness

  11. ST segment elevation associated with hydrochloric acid ingestion

    Science.gov (United States)

    Yeh, I-Jeng; Liu, Kuan-Ting

    2017-01-01

    Abstract Rationale: Electrocardiography (ECG) was used to diagnose acute coronary syndrome, but many other diseases may also result in ST segment change. We report one case of ingested hydrochloric acid present with ST segment elevation in the ECG. However, subsequent coronary angiography did not reveal significant coronary occlusion. Patient concerns: An 83-year-old female was transferred to our emergency department (ED) from the branch hospital due to ingestion of toilet bowl cleaner containing 9.5% hydrochloric acid. She complained about chest pain and 12-lead ECG showed ST segment elevation at lead II, III, and aVF. The blood examinations revealed elevation of aspartate transaminase (69 IU/L), thrombocytopenia (62,000/μL), and acidosis (pH 7.311, pCO2 27 mm Hg, HCO3 13.3 mmol/L). Creatine kinase-MB and troponin I did not elevate then. Diagnoses: After transferred to our ED, coronary angiography was done within 1 hour. Angiography showed 60% stenosis in the segment 7 of left anterior descending coronary artery and 30% nonsignificant stenosis in the segment 2 of right coronary artery, with no apical ballooning. No significant lesion consistent with ST segment elevation myocardial infarction was found. Interventions: Conservative treatment was chosen. Outcomes: Bradycardia was followed by cardiac arrest that developed 4 hours later. Cardiopulmonary resuscitation was applied and the patient became shock status after return of spontaneous circulation. The patient was admitted to the intensive care unit and expired on next day. Lessons: Patients of ingested hydrochloric acid present with ST segment elevation in the ECG may not indicate coronary artery disease. This ECG finding may be a poor prognostic index in such patients. PMID:29381986

  12. Environmental Assessment on the leasing of the Strategic Petroleum Reserve, St. James Terminal, St. James Parish, Louisiana

    International Nuclear Information System (INIS)

    1995-01-01

    The US Department of Energy (DOE) proposes to lease the Strategic Petroleum Reserve's (SPR) St. James Terminal to private industry. The St. James Terminal consists of six storage tanks, a pumping station, two maine docks and ancillary facilities. DOE believes that the St. James Terminal presents an opportunity to establish a government- industry arrangement that could more effectively use this asset to serve the nations's oil distribution needs, reduce the operational cost of the SPR, and provide a source of revenue for the Government. DOE solicited interest in leasing its distribution facilities in a notice published March 16, 1994. In response, industry has expressed interest in leasing the St. James Terminal, as well as several DOE pipelines, to enhance the operation of its own facilities or to avoid having to construct new ones. Under such a lease, industry use would be subordinate to DOE use in the event of a national energy emergency. This Environmental Assessment describes the proposed leasing operation, its alternatives, and potential environmental impacts. Based on this analyses, DOE has determined that the proposed action is not a major Federal action significantly affecting the quality of the human environment within the meaning of the National Environmental Policy Act (NEPA) OF 1969 and has issued the Finding of No Significant Impact (FONSI)

  13. Introduction to Future Wireless Networks research group's projects/activities (St. Petersburg)

    CSIR Research Space (South Africa)

    Lysko, Albert A

    2017-05-01

    Full Text Available The presentation about the CSIR Meraka's Future Wireless Networks research group's projects and activities was delivered to Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia, during May 2017...

  14. E-st@r-I experience: Valuable knowledge for improving the e-st@r-II design

    Science.gov (United States)

    Corpino, S.; Obiols-Rabasa, G.; Mozzillo, R.; Nichele, F.

    2016-04-01

    Many universities all over the world have now established hands-on education programs based on CubeSats. These small and cheap platforms are becoming more and more attractive also for other-than-educational missions, such as technology demonstration, science applications, and Earth observation. This new paradigm requires the development of adequate technology to increase CubeSat performance and mission reliability, because educationally-driven missions have often failed. In 2013 the ESA Education Office launched the Fly Your Satellite! Programme which aims at increasing CubeSat mission reliability through several actions: to improve design implementation, to define best practices for conducting the verification process, and to make the CubeSat community aware of the importance of verification. Within this framework, the CubeSat team at Politecnico di Torino developed the e-st@r-II CubeSat as follow-on of the e-st@r-I satellite, launched in 2012 on the VEGA Maiden Flight. E-st@r-I and e-st@r-II are both 1U satellites with educational and technology demonstration objectives: to give hands-on experience to university students and to test an active attitude determination and control system based on inertial and magnetic measurements with magnetic actuation. This paper describes the know-how gained thanks to the e-st@r-I mission, and how this heritage has been translated into the improvement of the new CubeSat in several areas and lifecycle phases. The CubeSat design has been reviewed to reduce the complexity of the assembly procedure and to deal with possible failures of the on-board computer, for example re-coding the software in the communications subsystem. New procedures have been designed and assessed for the verification campaign accordingly to ECSS rules and with the support of ESA specialists. Different operative modes have been implemented to handle some anomalies observed during the operations of the first satellite. A new version of the on-board software is

  15. Electrocardiogram pearl: ST-T changes in patient with chest pain – Ischemia or infarction?

    Directory of Open Access Journals (Sweden)

    Parminder Singh Manghera

    2017-01-01

    Full Text Available Most common electrocardiogram (ECG findings of myocardial ischemia are ST segment deviations & T wave (ST-T alterations. However, multiple other conditions can cause ST-T changes mimicking ischemia including ventricular hypertrophy, bundle branch block, electrolyte imbalance, drugs, channelopathies, etc. Uncommonly, incorrect placement of limb leads can also produce ST-T changes leading to diagnostic dilemma. We report a case of erroneous limb-lead placement in a 45 years male mimicking ischemic ECG changes.

  16. ST Product Characteristics and Relationships with Perceptions and Behaviors among Rural Adolescent Males: A Qualitative Study

    Science.gov (United States)

    Couch, Elizabeth T.; Darius, Ellen F.; Walsh, Margaret M.; Chaffee, Benjamin W.

    2017-01-01

    Although smoking declines in the United States, the prevalence of male adolescent smokeless tobacco (ST; moist snuff and chewing tobacco) use remains unchanged. ST product characteristics, such as flavoring, packaging, and branding, could influence adolescents' ST initiation and continued use. This qualitative study examines the potential role of…

  17. Hemodialysis Infection Prevention Protocols Ontario—Shower Technique (HIPPO-ST: A Pilot Randomized Trial

    Directory of Open Access Journals (Sweden)

    S. Daisy Kosa

    2017-03-01

    Discussion: This HIPPO-ST pilot study demonstrated the feasibility of the larger HIPPO-ST study, especially given the high levels of education success with the HIPPO-ST arm and the low levels of contamination in the control arm.

  18. 75 FR 71017 - Drawbridge Operation Regulations; Bayou Liberty, St. Tammany Parish, Slidell, LA

    Science.gov (United States)

    2010-11-22

    ... SECURITY Coast Guard 33 CFR Part 117 Drawbridge Operation Regulations; Bayou Liberty, St. Tammany Parish... regulation governing the operation of the S433 bridge over Bayou Liberty, mile 2.0, St. Tammany Parish... Liberty at mile 2.0, in St. Tammany Parish. The vertical clearance is 7.59 feet (2.31m) above the 2...

  19. 33 CFR 165.762 - Security Zone; St. Thomas, U.S. Virgin Islands.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Security Zone; St. Thomas, U.S....762 Security Zone; St. Thomas, U.S. Virgin Islands. (a) Location. Moving and fixed security zones are established 50 yards around all cruise ships entering, departing, moored or anchored in the Port of St. Thomas...

  20. A Case Study of 21st Century Skills in High Achieving Elementary Schools in Pennsylvania

    Science.gov (United States)

    Egnor, Gregory P.

    2013-01-01

    This study examines if practices that advocate for 21st century skills are in conflict with the mandates of NCLB. Interviews with influential school leaders of high achieving elementary schools focused on collecting data about 21st century skills. This study was designed to (a) Determine if 21st century skills are addressed in high achieving…

  1. Methicillin-Resistant Staphylococcus aureus ST398 from Human Patients, Upper Austria

    Science.gov (United States)

    Metz-Gercek, Sigrid; Mittermayer, Helmut

    2009-01-01

    Methicillin-resistant Staphylococcus aureus (MRSA) clonal type ST398 is usually associated with animals. We examined 1,098 confirmed MRSA samples from human patients and found that 21 were MRSA ST398. Most (16) patients were farmers. Increasing prevalence from 1.3% (2006) to 2.5% (2008) shows emergence of MRSA ST398 in humans in Austria. PMID:19402964

  2. A Comparative Analysis of International Frameworks for 21st Century Competences: Implications for National Curriculum Policies

    Science.gov (United States)

    Voogt, Joke; Roblin, Natalie Pareja

    2012-01-01

    National curricula need to change drastically to comply with the competences needed for the 21st century. In this paper eight frameworks describing 21st century competences were analysed. A comprehensive search for information about 21st century competences was conducted across the official websites of the selected frameworks, resulting in 32…

  3. 76 FR 27251 - Safety Zone; Coughlin Wedding Fireworks, Lake St. Clair, Harrison Township, MI

    Science.gov (United States)

    2011-05-11

    ...-AA00 Safety Zone; Coughlin Wedding Fireworks, Lake St. Clair, Harrison Township, MI AGENCY: Coast Guard... of Lake St. Clair during the Coughlin Wedding Fireworks. DATES: This rule is effective from 10 p.m... wedding that will include fireworks launched from a point on Lake St. Clair. This temporary safety zone is...

  4. 76 FR 58110 - Safety Zone; Giannangeli Wedding Fireworks, Lake St. Clair, Harrison Township, MI

    Science.gov (United States)

    2011-09-20

    ...-AA00 Safety Zone; Giannangeli Wedding Fireworks, Lake St. Clair, Harrison Township, MI AGENCY: Coast... of Lake St. Clair during the Giannangeli Wedding Fireworks. DATES: This rule is effective and will be... is holding a land based wedding that will include fireworks launched from a point on Lake St. Clair...

  5. 76 FR 43896 - Safety Zone; Kathleen Whelan Wedding Fireworks, Lake St. Clair, Grosse Pointe Farms, MI

    Science.gov (United States)

    2011-07-22

    ...-AA00 Safety Zone; Kathleen Whelan Wedding Fireworks, Lake St. Clair, Grosse Pointe Farms, MI AGENCY... portion of Lake St. Clair during the Kathleen Whelan Wedding Fireworks. DATES: This rule is effective from... party is holding a land based wedding that will include fireworks launched from a point on Lake St...

  6. 75 FR 62461 - Revocation and Establishment of Class E Airspace; St. George, UT

    Science.gov (United States)

    2010-10-12

    ... make the changes. With the exception of editorial changes, and the changes described above, this rule... feet or more above the surface of the earth. * * * * * ANM UT E5 St. George, UT [Removed] Paragraph... 700 feet or more above the surface of the earth * * * * * ANM UT E5 St. George, UT [New] St. George...

  7. Henkilöstön työhyvinvointi muutosprosessissa : Case: Valtion talous- ja henkilöstöhallinnon palvelukeskus

    OpenAIRE

    Riihelä, Kati

    2010-01-01

    Tämä opinnäytetyö käsittelee henkilöstön työhyvinvointia muutosprosessissa. Case-organisaatioksi on valittu Valtion talous- ja henkilöstöhallinnon palvelukeskus, lyhyemmin Palkeet. Valtiovarainministeriön ohjauksessa toimiva palvelukeskus aloitti toiminnan 1.1.2010 neljän valtionhallinnon talous- ja henkilöstöhallinnon palvelukeskuksen yhdistyttyä hallinnollisesti yhdeksi virastoksi. Opinnäytetyön päätutkimusongelmana ja tavoitteena on selvittää, millainen on henkilöstön näkemys organisa...

  8. SAES St 909 pilot scale methane cracking tests

    International Nuclear Information System (INIS)

    Klein, J. E.; Sessions, H. T.

    2008-01-01

    Pilot scale (0.5 kg) SAES St 909 methane cracking tests were conducted for potential tritium process applications. Up to 1400 hours tests were done at 700 deg.C, 202.7 kPa (1520 torr) with a 0.03 sLPM feed of methane plus impurities, in a 20 vol% hydrogen, balance helium, stream. Carbon dioxide gettered by St 909 can be equated to an equivalent amount of methane gettered, but equating nitrogen to an equivalent amount of methane was nitrogen feed composition dependent. A decreased hydrogen feed increased methane getter rates while a 30 deg.C drop in one furnace zone increased methane emissions by over a factor of 30. The impact of gettered nitrogen can be somewhat minimized if nitrogen feed to the bed has been stopped and sufficient time given to recover the methane cracking rate. (authors)

  9. Evolution of the framework for 21st century competencies

    Directory of Open Access Journals (Sweden)

    Sdenka Z. Salas-Pilco

    2013-03-01

    Full Text Available This article presents the successive changes and evolution of the frameworks for 21st century competencies, since the appearance of the first conceptual models during the final years of the last century, and also it is a review of the competencies that are needed in the 21st century with a special focus on the Information and Communication Technologies (ICT competencies. The included frameworks have been elaborated by diverse institutions such as international organizations, private consortia and also governments as a guideline for educational policies in elementary and secondary schools. Later, the frameworks are compared and analyzed according to a classification of the competencies into general categories, in order to visualize some trends and obtain some insights about the direction they are heading. Finally, it provides some suggestions for the conception of future frameworks.

  10. 21st Century Kinematics : The 2012 NSF Workshop

    CERN Document Server

    2013-01-01

    21st Century Kinematics focuses on algebraic problems in the analysis and synthesis of mechanisms and robots, compliant mechanisms, cable-driven systems and protein kinematics. The specialist contributors provide the background for a series of presentations at the 2012 NSF Workshop. The text shows how the analysis and design of innovative mechanical systems yield increasingly complex systems of polynomials, characteristic of those systems. In doing so, takes advantage of increasingly sophisticated computational tools developed for numerical algebraic geometry and demonstrates the now routine derivation of polynomial systems dwarfing the landmark problems of even the recent past. The 21st Century Kinematics workshop echoes the NSF-supported 1963 Yale Mechanisms Teachers Conference that taught a generation of university educators the fundamental principles of kinematic theory. As such these proceedings will be provide admirable supporting theory for a graduate course in modern kinematics and should be of consid...

  11. Potilasopas metabolisesta oireyhtymästä Keravan terveyskeskuksen vastaanotolle

    OpenAIRE

    Rantanen, Leila

    2010-01-01

    Opinnäytetyön tarkoituksena on tehdä tiivis ja selkeä tietopaketti kansion muotoon metaboli-sesta oireyhtymästä. Kansio tulee Keravan terveyskeskuksen itäisen, pohjoisen ja eteläisen avovastaanoton odotusaulaan asiakkaiden käyttöön. Työn tarkoituksena on tehdä aikuisasiak-kaille potilasopas metabolisesta oireyhtymästä ja sen ennaltaehkäisystä. Tavoitteena on asi-akkaiden terveystietoisuuden lisääminen. Oppaan tavoitteena on lisäksi, että ihmiset tiedos-taisivat painoindeksinsä ja vyötärönmitt...

  12. The Størmer problem for an aligned rotator

    Science.gov (United States)

    Epp, V.; Pervukhina, O. N.

    2018-03-01

    The effective potential energy of the particles in the field of rotating uniformly magnetized celestial body is investigated. The axis of rotation coincides with the axis of the magnetic field. Electromagnetic field of the body is composed of a dipole magnetic and quadrupole electric fields. The geometry of the trapping regions is studied as a function of the magnetic field magnitude and the rotation speed of the body. Examples of the potential energy topology for different values of these parameters are given. The main difference from the classical Størmer problem is that the single toroidal trapping region predicted by Størmer is divided into equatorial and off-equatorial trapping regions. Applicability of the idealized model of a rotating uniformly magnetized sphere with a vacuum magnetosphere to real celestial bodies is discussed.

  13. In Vitro Toxicity testing in the 21st Century

    Directory of Open Access Journals (Sweden)

    Erwin L Roggen

    2011-02-01

    Full Text Available The National Research Council (NRC article Toxicity Testing in the 21st Century: A vision and A Strategy (National Research Council, 2007 was written to bring attention to the application of scientific advances for use in toxicity tests so that chemicals can be tested in a more time and cost efficient manner while providing a more relevant and mechanistic insight into the toxic potential of a compound.Development of tools for in vitro toxicity testing constitutes an important activity of this vision and contributes to the provision of test systems as well as data that are essential for the development of computer modelling tools for e.g. system biology, physiologically-based modelling. This article intends to highlight some of the issues that have to be addressed in order to make in vitro toxicity testing a reality in the 21st century.

  14. Evaluation of the St. Lucia geothermal resource: macroeconomic models

    Energy Technology Data Exchange (ETDEWEB)

    Burris, A.E.; Trocki, L.K.; Yeamans, M.K.; Kolstad, C.D.

    1984-08-01

    A macroeconometric model describing the St. Lucian economy was developed using 1970 to 1982 economic data. Results of macroeconometric forecasts for the period 1983 through 1985 show an increase in gross domestic product (GDP) for 1983 and 1984 with a decline in 1985. The rate of population growth is expected to exceed GDP growth so that a small decline in per capita GDP will occur. We forecast that garment exports will increase, providing needed employment and foreign exchange. To obtain a longer-term but more general outlook on St. Lucia's economy, and to evaluate the benefit of geothermal energy development, we applied a nonlinear programming model. The model maximizes discounted cumulative consumption.

  15. Sustainable Nuclear Energy for the 21st Century

    International Nuclear Information System (INIS)

    2010-09-01

    Concerns over energy resource availability, energy security and climate change suggest an important role for nuclear power in supplying sustainable energy in the 21st century. The International Project on Innovative Nuclear Reactors and Fuel Cycles (INPRO) was initiated in 2000 by a resolution of the IAEA General Conference to help ensure that nuclear energy is available to contribute to meeting global energy needs of the 21st century in a sustainable manner. It is a mechanism for IAEA Member States that have joined the project as INPRO members to collaborate on topics of joint interest. By 2010, INPRO membership had grown to 30 countries and the European Commission. The results of INPRO's activities, however, are made available to all IAEA Member States

  16. Globalization of S&T: Key Challenges Facing DOD

    Science.gov (United States)

    2012-02-01

    breadth and pace of innovation. We are now experiencing a global shift to a more level playing field among nations; demographics, economics , and...are now experiencing a global shift to a more level playing field among nations; demographics, economics , and political forces are the driving...Energizing and Employing America for a Brighter Economic Future (2007). 7 Knowledge, Networks, and Nations: Global Scientific Collaboration in the 21st

  17. Stædige infrastrukturer og genstridige praksisser

    DEFF Research Database (Denmark)

    Harders, Anne Katrine Braagaard

    byudviklingsprojekter er funderet i gode intentioner og flotte visioner. Men når intentioner og visioner skal omsættes til realitet, er det ikke noget, der sker på et tomt lærred. Byen er en kompleks størrelse, der udgøres af allerede eksisterende infrastrukturer og praksisser, som svært lader sig nedbryde...

  18. EIA-U9-U-st-19-9

    Indian Academy of Sciences (India)

    A coin can be moved from one square to another if and only if the distance between the centres of the two squares is ;Jr. The task is to find a sequence. 6 Ashish Kumar Singh, Kanpur No medal of moves taking the coin from the square. -90----------------------------~---------------~--O-NA-NC--E-I-A-U9-U-st-19-9--6 ...

  19. DOE pollution prevention in the 21st century. Proceedings

    International Nuclear Information System (INIS)

    1996-01-01

    This CD-ROM contains the proceedings from the DOE Pollution Prevention in the 21st Century Conference XII held July 9-11, 1996. Topics included model facilities, federal and NEPA stakeholders, microchemistry, source 4 solvents and reduction, education and outreach planning, return on investment, energy management, decontamination and decommissioning, planning and regulations, environmental restoration, solid waste, recycling, affirmative procurement in the executive branch, construction and demolition, international and ISO 14000, and poster sessions

  20. Creativity in Hospitality Industry: Study of Hostels in St. Petersburg

    Directory of Open Access Journals (Sweden)

    Irina Borovskaya

    2014-10-01

    Full Text Available The aim of this study is to explore dimensions of creativity in hostels managerial practices taking the example of St. Petersburg. Within the study 72 semi-structured interviews were conducted with owners and employees of hostels during October–November 2012. The findings of the study identify four main managerial activities as key elements of creativity in hostels. They are: targeted recruitment, segmentation of customers, organization of space, and organization of communications both with internal and external stakeholders.