112,129 research outputs found
Метод реінтродукції як захід активного збереження видів роду Stipa L.
Get PDFDonetsk National University – Topicality of ecological and botanical research of steppe associations is conditioned both by scientific requirements (ecological and cenotic niches, potentials; steadiness and dynamism; diagnostics and control of the state of ecosystems balance) and practice of land tenure and resource preservation. As a result of the inventory on the territory of the RLP «Kleban-Byk» 13 species of Stipa were identified. In the course of the research it was stated that the age state of the populations is not satisfactory and demands reintroduction measures. In cases when anthropogenic impact leads to disappearance of these species from the complex of vegetable groups, there is need of their reintroduction, its successfulness having been proved for S. dasyphyllа and S. capіllata.
Актуальність еколого-ботанічних досліджень степових угруповань зумовлена і потребами науки (еколого-ценотичні ніші, потенціали; стійкість та динамізм; діагностика та контроль стану збалансованості екосистем), і практики землекористування та ресурсозбереження. У результаті інвентаризаційних робіт на території РЛП «Клебан-Бик» було визначено 13 видів ковил. Більшість видів роду Stipa L., які зростають на території РЛП «Клебан-Бик», мали регресивні популяції або тенденцію до регресивності й знижений рівень відновлення особин. Коли антропогенний вплив призводить до зникнення зі складу рослинних угруповань цих видів, виникає потреба їх реінтродукції, найбільшу успішність упровадження якої доведено для S. dasyphyllа і S. сapіllata.Department of Biology, Donetsk National Universit
Applications of the new N07D basis set for the calculation of structural and magnetic properties
No full textComunicazione Scientifica al 37th National Congress of Physical Chemistry, Camogli (Italy
Application of new pbe0/N07D and b3lyp/N07D computational models for the calculation of structural parameters and magnetic tensors
No full textComunicazione Scientifica al 5th International Conference on Nitroxide Radicals "SPIN 2008" - Ancona (Italy
Las gramineas mendocinas del genero Stipa : taxonomía
Get PDFIn order to describe phytogeographically Stipa pastures of the province of Mendoza, a previous revision of the genus is undertaken. The work begins with morphological considerations, the principal attention heing paid to the taxonomic values of the characters. A key based fundamentally an suhgenuses established by SPEcAzzINI is given, and as to Pappostipa subgenus, the author follows the judgment of Agronomic Engineer L. R. PARODI. Different taxa are described and to these the author adds the studied materíals and his observations on their distribution, systematics, etc. On the whole, 35 Mendoza species, 12 varieties and forms are named. The following new species are treated:
Stirpa Semperiana, S. vatroensis. S. Ruiz Lealii, S. Parodiana, S. malalhuensis, S. barrancaensis; equally, the following varieties: S. speciosa v. parva, S. vaginata v. dilatata, S. cordobensis v. tuberculata, and the following forms: S. speciosa f. horrida, S. speciosa f. abscondita, S. vaginata f. laevis, S. vaginata f. contracta, S. vaginata f. immersa, S. vaginata f. rigida, S. chrysophylla f. minuta y S. chrysophylla f. modica. The possibility of hybrids S. speciosa - S. vaginata is discussed, going over to the synonymy of S. perrigida SPEc. The species and varieties are illustrated with analytic drawings and photographies of the types.En el deseo de describir fitogeográficamente los pastizales de Stipa de la provincia de Mendoza, se hace previamente la revisión del género. Se introduce el trabajo con consideraciones morfológicas dando principal atención al valor taxonómico de los caracteres. Se da una clave basada fundamentalmente en los subgéneros establecidos por SPEGAZZINI y, en lo que se refiere al subgénero Pappostipa en especial, se sigue el criterio del Ing. Agr. L. R. PARODI. Se describen los diversos taxa, agregándose los materiales estudiados y observaciones sobre su distribución, sistemática, etc. En total se da para Mendoza 35 especies, 12 variedades y 9 formas. Se consideran nuevas especies, Stipa Semperiana, S. vatroensis, S. Ruiz Lealii, S. Parodiana, S. malalhuensis y S. barrancaensis; como nuevas variedades, S. speciosa var. parva, S. vaginata var. dilatata y S. cordobensis var. tnberculata y como nuevas formas S. speciosa var. horrida, S. speciosa fma. abscondita, S. vaginata fma. laevis, S. vaginata fma. contracta, S. vaginata fma. immersa, S. vaginata fma. rigida, S. chrysophylla fma. minuta, y S. chrysophylla fma, modica. Se discute la posibilidad de híbridos entre S. speciosa y S. vaginata y se pasa a la sinonimia S. perrigida SPEG. Las especies y variedades se ilustran con dibujos analíticos y fotografías de los tipos.Fil: Roig, Fidel A..
Universidad Nacional de Cuyo. Facultad de Ciencias Agraria
Nuovi Vettori Sintetici per la Terapia Genica. Caratterizzazione di 3-O-{2-[(12-Crown-4)-Metossi]Etil}-1,2-O-Dioleil-SN-Glicerolo mediante misure FT-IR e di Potenziale Z
No full textComunicazione Scientifica al Congresso AICING 08, Ischia (Italy
author-bios-SRD-19-0063.R1 – Supplemental material for The Network Structure of Police Misconduct
No full textSupplemental material, author-bios-SRD-19-0063.R1 for The Network Structure of Police Misconduct by George Wood, Daria Roithmayr and Andrew V. Papachristos in Socius</p
Oxidised LDL (OxLDL) induces production of platelet derived growth factor AA (PDGF AA) from aortic smooth muscle cells
No full textObjectives: Elevated concentrations of oxidised low density lipoproteins (OxLDL) are associated with accelerated atherogenesis. The aim of our study was to determine the effect of OxLDL on the proliferation rate and platelet derived growth factor (PDGF) AA production on aortic smooth muscle cells. High density lipoproteins (HDL), which are known to have a protective effect against atherosclerosis, were used as control. Materials and methods: Bovine aortic smooth muscle cells were grown in presence of increased concentrations of OxLDL and HDL and in presence of control medium culture (DMEM). Proliferation rate was assessed by 3H-thymidine uptake. PDGF AA production was determined by ELISA and Western Blot Analysis. Results: OxLDL increased the proliferation rate of aortic smooth muscle cells as compared to DMEM and HDL (p < 0.001). The mitogenic activity of OxLDL on smooth muscle cells was reduced adding anti-PDGF AA antibodies (p < 0.001). PDGF AA production by aortic smooth muscle cells was increased after exposure to OxLDL as compared to DMEM (p < 0.001). HDL significantly reduced the production of PDGF AA by aortic smooth muscle cells (p < 0.001). Conclusions: Part of the atherogenic effect of OxLDL is mediated through the autocrine production of PDGF AA from aortic smooth muscle cells
Angiogenesis as a prognostic indicator in pancreatic ductal adenocarcinoma
No full textBACKGROUND: Angiogenesis has gained wide acceptance as a reliable prognostic factor in several solid tumors. However, to date, experience in pancreatic adenocarcinoma is limited. MATERIALS AND METHODS: Specimens from 45 patients radically operated on at our departments from 1988 to 1997 were stained immunohistochemically with the antibodies anti-mutant p53, anti-bcl2, anti Ki67 and anti-CD31. All the slides were reviewed by the same pathologist without knowledge of the patients' outcome. RESULTS: Mutant p53, Ki67 index and vessel count were significantly related to tumoral behaviour and patients' outcome. Among patients with nodal involvement (Stage III), cumulative survival between hypovascular and hypervascular subgroups differed significantly (p = 0.03). Angiogenesis was independent from TNM in assessing the patients'prognosis at COX analysis (p = 0.02). CONCLUSION: In patients with pancreatic adenocarcinoma, angiogenesis is a reliable indicator of tumor extension, lymph node status and survival. Its evaluation as a common procedure may contribute to a further improvement in the management of these patients and to a proper selection of those who could benefit from different follow-up protocols or adjuvant treatment
Poaceae dos campos de altitude do Parque Nacional de São Joaquim, Santa Catarina, Brasil
Get PDFDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Programa de Pós-Graduação em Biologia de Fungos, Algas e Plantas, Florianópolis, 2013.O Parque Nacional de São Joaquim (PARNA São Joaquim) situa-se na região centro-norte dos Aparados da Serra Geral, no planalto sul do estado de Santa Catarina, no bioma Mata Atlântica. Compreende 49300 ha constituídos em suas partes mais altas de formações campestres associadas à Floresta Ombrófila Mista, Matinhas Nebulares e Florestas de Galeria. A presente pesquisa foi realizada nos campos de altitude dos municípios de Bom Jardim da Serra e Urubici inseridos no Parque. O objetivo do estudo foi levantar as espécies de Poaceae do PARNA São Joaquim e fornecer meios para a sua identificação, além de informações atualizadas sobre os táxons. O levantamento foi baseado em revisão bibliográfica, revisão de coleções de herbários, coletas e observações em campo, realizadas entre outubro de 2009 a março de 2013. Foi constatada a ocorrência de 113 espécies, distribuídas em 43 gêneros, 12 tribos e seis subfamílias, sendo 102 espécies (90%) nativas e 11 espécies (10%), exóticas. A subfamília mais bem representada é Pooideae com 55 espécies, distribuídas em quatro tribos (Poeae 34 spp., Stipeae 13 spp., Meliceae 5 spp., Bromeae 3 spp.), seguida de Panicoideae com 38 espécies (Paniceae s. l. 22 spp., Andropogoneae 16 spp.), Chloridoideae com 8 espécies (Cynodonteae e Eragrostideae 3 spp. cada e Zoyseae 2 spp.), Bambusoideae (Bambuseae 6 spp.), Danthonioideae (Danthonieae 4 spp.) e Ehrhartoideae (Oryzeae 2 spp.) Os gêneros mais bem representados são Chascolytrum Desv. (11 spp.), Paspalum L. (10 spp.) e Stipa L. (9 spp.), os demais apresentaram cinco, quatro, três, duas ou uma espécie. Danthonia secundiflora J. Presl subsp. mattheii C. M. Baeza, Chascolytrum rufum J. Presl var. rufum, Poa bonariensis (Lam.) Kunth, Poa pratensis L. e Stipa filifolia Nees, são registros novos para o estado de Santa Catarina. Bromidium ramboi (Parodi) Rúgolo var. pubescens (Kämpf) Rúgolo teve seu segundo registro para o Estado, após a coleção-tipo. Bothriochloa sp. e Zizaniopsis sp. são espécies novas para a ciência.Abstract : The National Park of São Joaquim (PARNA São Joaquim) is located in the north central portion of the Aparados da Serra Geral, south plateau of Santa Catarina state, in the Atlantic Forest biome. The Park has 49300 ha, consisting in its higher parts of grasslands associated with Araucaria Forest, cloud and gallery forests. This research was conducted in the montane grasslands of the municipalities of Bom Jardim da Serra and Urubici, inserted in the Park. The aim of the study was to identify the species of the Poaceae of PARNA São Joaquim and provide means for their identification, as well as updated information on taxa. The survey was based on review of literature and herbarium collections, as well as field collections carried out between October 2009 and March 2013. It has been found the occurrence of 113 species in 43 genera, 12 tribes and six subfamilies, of these 102 species (90%) are native and 11 species (10%) are exotic. Pooideae is the best represented subfamily, with 55 species distributed in four tribes (Poeae 34 spp., Stipeae 13 spp., Meliceae 5 spp. and Bromeae 3 spp.); followed by Panicoideae with 38 species (Paniceae s.l. 22 spp. and Andropogoneae 16 spp.), Chloridoideae with 8 species (Cynodonteae and Eragrostideae 3 spp. each and Zoyseae 2 spp.), Bambusoideae (Bambuseae 6 spp.), Danthonioideae (Danthonieae 4 spp.) and Ehrhartoideae (Oryzeae 2 spp.). The better represented genera are Chascolytrum Desv. (11 spp.), Paspalum L. (10 spp.) and Stipa L. (9 spp.). The other genera have five, four, three, two or one species. Danthonia secundiflora J. Presl subsp. mattheii C. M. Baeza, Chascolytrum rufum J. Presl var. rufum, Poa bonariensis (Lam.) Kunth, Poa pratensis L. and Stipa filifolia Nees, are new records for Santa Catarina. Bromidium ramboi (Parodi) Rúgolo var. pubescens (Kämpf) Rúgolo is second record for the State, after the type collection. Bothriochloa sp. and Zizaniopsis sp. are new species
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