381 research outputs found
Estimating the abundance of clustered and cryptic marine macro-invertebrates in the Galápagos with particular reference to sea cucumbers
Estimating the abundance of marine macro-invertebrates
is complicated by a variety of factors: 1) human
factors, such as diver efficiency and diver error; and 2)
biological factors, such as aggregation of organisms,
crypsis, and nocturnal emergence behavior. Diver efficiency
varied according to the detectability of an organism
causing under-estimation of density by up to 50% in some
species. All common species were aggregated at scales
from 10-50 m. Transects need to be long enough to transcend
the scale of patchiness to improve accuracy. Some
species of sea urchins and sea cucumbers (pepinos) which
are cryptic by day emerged at night so that daytime
censuses underestimated their abundance by up to 10
times. In the sea cucumber fishery, estimates of abundance
need to be made at the scale of the population, i.e. at
hundreds of km. A strategy for this is proposed
Structure And Floristic Similarities Of Upper Montane Forests In Serra Fina Mountain Range, Southeastern Brazil
The upper montane forests in the southern and southeastern regions of Brazil have an unusual and discontinuous geographic distribution at the top of the Atlantic coastal mountain ranges. To describe the floristic composition and structure of the Atlantic Forest near its upper altitudinal limit in southeastern Brazil, 30 plots with 10 × 10 m were installed in three forest sites between 2,200 and 2,300 m.a.s.l. at Serra Fina. The floristic composition and phytosociological structure of this forest were compared with other montane and upper montane forests. In total, 704 individuals were included, belonging to 24 species, 15 families, and 19 genera. Myrsinaceae, Myrtaceae, Symplocaceae, and Cunoniaceae were the most important families, and Myrsine gardneriana, Myrceugenia alpigena, Weinmannia humilis, and Symplocos corymboclados were the most important species. The three forest sites revealed differences in the abundance of species, density, canopy height, and number of stems per individual. The upper montane forests showed structural similarities, such as lower richness, diversity, and effective number of species, and they tended to have higher total densities and total dominance per hectare to montane forests. The most important species in these upper montane forests belong to Austral–Antartic genera or neotropical and pantropical genera that are typical of montane areas. The high number of species shared by these forests suggests past connections between the vegetation in southern Brazilian high-altitude areas.2915872Abe, N., Yamada, T., Variation in allometry and tree architecture among Symplocos species in a Japanese warm-temperate forest (2008) Journal of Plant Research, 121, pp. 155-162Archibald, S., Bond, W.J., Growing tall vs. growing wide: Tree architecture and allometry of Acacia karroo in forest, savanna, and arid environments (2003) Oikos, 102, pp. 3-14Arriaga, L., Types and causes of tree mortality in a tropical montane cloud forest of Tumaulipas, Mexico (2000) Journal of Tropical Ecology, 16, pp. 623-636Ayres, M., Ayres, M., Jr., Ayres, D.L., Santos, A.S., (2007) BioEstat 5.0: Aplicações nas áreas das ciências biológicas e médicas, , Belém, Sociedade Civil MamirauáBehling, H., Late quaternary vegetational and climatic changes in Brazil (1998) Review of Palaeobotany and Palynology, 99, pp. 143-156Behling, H., South and southeast Brazilian grasslands during Late Quaternary times: A synthesis (2002) Palaeogeography, Palaeoclimatology, Palaeoecolgy, 177, pp. 19-27Bellingham, P.J., Tanner, E.V.J., The influence of topography on tree growth, mortality, and recruitment in a tropical montane forest (2000) Biotropica, 32, pp. 378-384Bertoncello, R., Yamamoto, K., Meireles, L.D., Shepherd, G.J., A phytogeographic analysis of cloud forests and other forest subtypes amidst the Atlantic forest in south and southeast Brazil (2011) Biodiversity and Conservation, 20, pp. 3413-3433Bruijnzeel, L.A., Proctor, J., Hydrology and biogeochemistry of tropical montane cloud forest: What do we really know? (1995) Tropical montane cloud forests, pp. 38-79. , Hamilton LS, Juvik JO, Scatena FN. (eds.) New York, Springer-VerlagBruijnzeel, L.A., Venaklaas, E.J., Climatic conditions and tropical montane forest productivy: The fog has not lifted yet (1998) Ecology, 79, pp. 3-9Cabrera, A.L., Revision del genero Dasyphyllum (Compositae) (1959) Revista del Museo de La Plata, 9, pp. 1-100Carvalho, L.M.T., Fontes, M.A.L., Oliveira-Filho, A.T., Tree species distribution in canopy gaps and mature forest in a area of cloud forest of the Ibitipoca Range, south-eastern Brazil (2000) Plant Ecology, 149, pp. 9-22Cavalier, J., Goldstein, G., Mist and fog interpretation in elfin cloud Forest in Colombia and Venezuela (1989) Journal of Tropical Ecology, 5, pp. 309-322Chiessi, C.M., (2004) Tectônica cenozóica do Maciço Alcalino de Passa Quatro (SP-MG-RJ), , Msc Thesis, Universidade de São Paulo, BrazilClark, L.G., Chusquea (2001) Flora Fanerogâmica do Estado de São Paulo, 1, pp. 24-36. , Wanderley MGL, Shepherd GJ, Giulietti AM. (eds.). São Paulo, Fapesp, HucitecDislich, R., Cersósimo, L., Mantovani, W., Análise da estrutura de fragmentos florestais no Planalto Paulistano - SP (2001) Revista Brasileira de Botânica, 24, pp. 321-332Doumenge, C., Gilmour, D., Perez, M.R., Blockhus, J., Tropical montane cloud forests: Conservation status and management issues (1995) Tropical montane cloud forests, pp. 24-37. , Hamilton LS, Juvik JO, Scatena FN. (eds.) New York, Springer-VerlagFalkenberg, D.B., (2003) Matinhas nebulares e vegetação rupícola dos Aparados da Serra Geral (SC/RS), sul do Brasil, , PhD Thesis, Universidade Estadual de Campinas, BrazilFalkenberg, D.B., Voltolini, J.C., The montane cloud forest in Southern Brazil (1995) Tropical montane cloud forests, pp. 138-149. , Hamilton LS, Juvik JO, Scatena FN. (eds.) New York, Springer-VerlagFlenley, J.R., Cloud forest, the Massenerhebung effect, and ultraviolet insolation (1995) Tropical montane cloud forests, pp. 150-155. , Hamilton LS, Juvik JO, Scatena FN. (eds.) New York, Springer-VerlagFrança, G.S., Stehmann, J.R., Composição florística e estrutura do componente arbóreo de uma floresta altimontana no município de Camanducaia, Minas Gerais, Brasil (2004) Revista Brasileira de Botânica, 27, pp. 19-30Gioda, A., Maley, J., Guasp, R.E., Baladón, A.A., Some low elevation fog forests of dry environments: Applications to African paleoenvironments (1995) Tropical montane cloud forests, pp. 156-164. , Hamilton LS, Juvik JO, Scatena FN. (eds.) New York, Springer-VerlagGiulietti, A.M., Pirani, J.R., Patterns of geographic distribution of some species from the Espinhaço Range, Minas Gerais and Bahia, Brasil (1988) Proceedings of a Workshop on Neotropical Distribution Patterns, pp. 39-69. , Vanzolini PE, Heyer WR. (eds.) Rio de Janeiro, Academia Brasileira de CiênciasGivnish, T.J., On the causes of gradients in tropical tropical tree diversity (1999) Journal of Ecology, 87, pp. 193-210Grubb, P.J., Whitmore, T.C., A comparison of montane and lowland rain forest in Ecuador. II. The climate and its effects on the distribution and physiognomy of the forests (1966) Journal of Ecology, 54, pp. 303-333Hamilton, L.S., Juvik, J.O., Scatena, F.N., The Puerto Rico tropical cloud forest symposium: Introduction and workshop synthesis (1995) Tropical montane cloud forests, pp. 1-23. , Hamilton LS, Juvik JO, Scatena FN. (eds.) New York, Springer-VerlagHill, M.O., Reciprocal averaging: An eigenvector method of ordination (1973) Journal of Ecology, 61, pp. 237-249Hueck, K., (1972) As Florestas da América do Sul, , Brasília, Editora da Universidade de BrasíliaJost, L., Entropy and diversity (2006) Oikos, 113, pp. 363-375Juvik, J.O., Nullet, D., Relationships between rainfall, cloud-water interception, and canopy throughfall in a Hawaiian montane forest (1995) Tropical montane cloud forests, pp. 165-182. , Hamilton LS, Juvik JO, Scatena FN. (eds.) New York, Springer-VerlagKelly, D.L., Tanner, E.V.J., Nic-Lughada, E.M., Kapos, V., Floristic and biogeography of a rain forest in the Venezuelan Andes (1994) Journal of Biogeography, 21, pp. 421-440King, R.M., Robinson, H., The genera of the Eupatoriae (Asteraceae). Monographs in Systematic Botany (1987) Missouri Botanical Garden, 22, pp. 1-581Kitayama, K., An altitudinal transect study of the vegetation on Mont Kinabalu, Borneo (1992) Vegetatio, 102, pp. 149-171Kitayama, K., Biophysical conditions of the montane cloud forests of Mount Kinabalu (1995) Tropical montane cloud forests, pp. 183-197. , Hamilton LS, Juvik JO, Scatena FN. (eds.) New York, Springer-VerlagKoehler, A., Galvão, F., Longhi, S.J., Floresta ombrófila densa altomontana: Aspectos florísticos e estruturais de diferentes trechos na Serra do Mar, PR (2002) Ciência Florestal, 12, pp. 27-39Landrum, L.R., A monograph of the genus Myrceugenia (Myrtaceae) (1981) Flora Neotropica, 29, pp. 1-137Lawton, R.O., Wind stress and elfin stature in a montane rain forest tree: An adaptive explanation (1982) American Journal of Botany, 69, pp. 1224-1230Lima, M.I.R.G., Souza, V.C., Rodrigues, R.R., Grossulariaceae (2005) Flora Fanerogâmica do Estado de São Paulo, 4, pp. 223-225. , Wanderley MGL, Shepherd GJ, Melhem TS, Giulietti AM. (eds.). São Paulo, Fapesp, RimaLuna-Vega, I., Morrone, J.J., Ayala, O.A., Organista, D.E., Biogeographical affinities among Neotropical cloud forests (2001) Plant Systematics and Evolution, 228, pp. 229-239Mabberley, D.J., (1998) The Plant-Book: A portable dictionary of the vascular plants, , 2nd. edn. Cambridge, Cambridge University PressMadsen, J.E., Ollgaard, B., Floristic composition, structure, and dynamics of an upper montane rain forest in Southern Ecuador (1994) Nordic Journal of Botany, 14, pp. 403-423Magurran, A.E., (1988) Ecological diversity and its measurement, , Princeton, Princeton University PressMartins, C.S., Caracterização física e fitogeográfica de Minas Gerais (2000) Lista vermelha das espécies ameaçadas de extinção da flora de Minas Gerais, pp. 35-43. , Mendonça MP, Lins LV. (eds.) Belo Horizonte, Fundação BiodiversitasMartins, F.R., Santos, F.A.M., (1999) Técnicas usuais de estimativa da biodiversidade, pp. 236-267. , Revista Holos, edição especialMcCune, B., Grace, J.B., (2002) Analysis of Ecological Communities, , Oregon, MjM Software DesignMeireles, L.D., Shepherd, G.J., Kinoshita, L.S., Variações na composição florística e na estrutura fitossociológica de uma floresta ombrófila densa alto-montana na Serra da Mantiqueira, Monte Verde, MG (2008) Revista Brasileira de Botânica, 31, pp. 559-574Meireles, L.D., (2009) Estudos florísticos, fitossociológicos e fitogeográficos em formações vegetacionais altimontanas da Serra da Mantiqueira Meridional, sudeste do Brasil, , PhD thesis, Universidade Estadual de Campinas, BrazilMerlin, M.D., Juvik, J.O., Montane cloud forest in tropical Pacific: Some aspects of their floristic, biogeography, ecology, and conservation (1995) Tropical montane cloud forests, pp. 234-253. , Hamilton LS, Juvik JO, Scatena FN. (eds.) New York, Springer-VerlagMuller-Dombois, D., Ellenberg, H., (1974) Aims and methods of vegetation ecology, , New York, John Wiley & SonsMüller, J., Systematics of Baccharis (Compositae-Astereae) in Bolivia, including an overview of the genus (2006) Systematic Botany Monographs, 6, pp. 1-341Nimer, E., Clima (1977) Geografia do Brasil: Região Sudeste, pp. 51-89. , Fundação Instituto Brasileiro de Geografia e Estatística (ed.) Rio de Janeiro, SERGRAFNimer, E., Clima (1977) Geografia do Brasil: Região Sul, pp. 35-79. , Fundação Instituto Brasileiro de Geografia e Estatística (ed.) Rio de Janeiro, SERGRAFOhsawa, M., Structural comparison of tropical montane rain forest along latitudinal and altitudinal gradients in south and east Asia (1991) Vegetatio, 97, pp. 1-10Oliveira, P.E., Behling, H., Ledru, M.P., Paleovegetação e paleoclimas do Quaternário do Brasil (2005) Quaternário do Brasil, pp. 52-74. , Souza CLG, Suguio K, Oliveira AMS, Oliveira PE. (eds.) Ribeirão Preto, HolosOliveira, R.S., Eller, C.B., Bittencourt, P.R.L., Mulligan, M., The hydroclimatic and ecophysiological basis of cloud forest distributions under current and projected climates (2014) Annals of Botany, 113, pp. 909-920Oliveira-Filho, A.T., Classificação das fitofisionomias da América do Sul Cisandina Tropical e Subtropical: Proposta de um novo sistema - prático e flexível - ou uma injeção a mais de caos? (2009) Rodriguésia, 60, pp. 237-258Oliveira-Filho, A.T., Fontes, M.A.L., Patterns of floristic differentiation among Atlantic Forest in southeastern Brazil and the influence of climate (2000) Biotropica, 32, pp. 793-810Pessenda, L.C.R., Oliveira, P.E., Moffato, M., The evolution of a tropical rainforest/grassland mosaic in southeastern Brazil since 28,000 14C yr BP based on carbone isotopes and pollen records (2009) Quaternary Reserch, 71, pp. 437-452Pohlman, C.L., Nicotra, A.B., Murray, B.R., Geographic range size, seedling ecophysiology and phenotypic plasticity in Australian Acacia species (2005) Journal of Biogeography, 32, pp. 341-351Portes, M.C.G.O., Galvão, F., A floresta alto-montana do sul do Brasil: Considerações climáticas, pedológicas e vegetacionais (2002) Cadernos de Biodiversidade, 3, pp. 44-50Punyasena, S.W., Eshel, G., McElwain, J.C., The influence of climate on the spatial pattern of Neotropical plant families (2008) Journal of Biogeography, 35, pp. 117-130Rambo, B., A flora de Cambará (1949) Anais Botânicos do Herbário Barbosa Rodrigues, 1, pp. 111-135Rocha, M.R.L., (1999) Caracterização fitossociológica e pedológica de uma floresta ombrófila densa altomontana no Parque Estadual Pico do Marumbi - Morretes, , PR. Msc Thesis, Universidade Federal do Paraná, BrazilRoderjan, C.V., (1994) A floresta ombrófila densa altomontana do Morro do Anhangava, Quatro Barras, PR - Aspectos Climáticos, Pedológicos e Fitossociológicos, , PhD Thesis, Universidade Federal do Paraná, BrazilRodrigues, R.R., Morellato, L.P.C., Joly, C.A., Leitão Filho, H.F., Estudo florístico e fitossociológico em um gradiente altitudinal de mata estacional mesófila semidecídua, na Serra do Japi, Jundiaí, SP (1989) Revista Brasileira de Botânica, 12, pp. 71-84Safford, H.D., Brazilian Páramos I. An introduction to the physical environment and vegetation of the campos de altitude (1999) Journal of Biogeography, 26, pp. 693-712Safford, H.D., Brazilian Páramos IV. Phytogeography of the campos de altitude (2007) Journal of Biogeography, 34, pp. 1701-1722Santos, I.S., Peixoto, A.L., Taxonomia do gênero Macropeplus Perkins (Monimiaceae, Monimoideae) (2005) Rodriguésia, 52, pp. 65-105Scarano, F.R., Structure, function and floristic relationships of plant communities in stressful habitats marginal to the Brazilian Atlantic Rainforest (2002) Annals of Botany, 90, pp. 517-524Scheer, M.B., Mocochinsky, A.Y., Roderjan, C.V., Estrutura arbórea da Floresta Ombrófila Densa Altomontana de serras do Sul do Brasil (2011) Acta Botanica Brasilica, 25, pp. 735-750Segadas-Viana, F., Dau, L., Ecology of the Itatiaia Range, Southeastern Brazil: II- Climates and altitudinal climatic zonation (1965) Arquivos do Museu Nacional, 53, pp. 31-53Shepherd, G.J., (2006) FITOPAC 1. Manual do usuário, , Campinas, Departamento de Botânica, UNICAMPSilva, J.U.L.E., Leite, W.C.A., Distribuição do coeficiente de variação da pluviosidade na região oriental paulista (2000) Anais do XXVII Congresso Interamericano de Engenharia Sanitária e Ambiental, pp. 1-8. , 2000, Porto Alegre-RS. Rio de Janeiro, ABESSleumer, H.O., Flacourtiaceae (1980) Flora Neotropica, 22, pp. 1-499Smith, C.E., Smith, L.B., Elaeocarpaceae (1970) Flora Ilustrada Catarinense., , Reitz R. (ed.) Itajaí, Herbário Barbosa RodriguesSoderstrom, T.R., Judziewicz, E.J., Clarck, L.G., Distribution patterns of neotropical bamboos (1987) Proceedings of a Workshop on Neotropical Distribution Patterns, pp. 121-157. , Vanzolini PE, Heyer WR. (eds.) Rio de Janeiro, Academia Brasileira de CiênciasStadtmüller, T., (1987) Cloud forests in the humid tropics. A bibliographic review, , Costa Rica, United Nations University & Centro Agronómico Tropical de Investigación EnseñanzaStern, M.J., Goodell, K., Kennard, D.K., Local distribution of Chusquea tomentosa (Poaceae:Bambusoideae) before and after a flowering event (1999) Biotropica, 31, pp. 365-368Tubelis, A., Nascimento, F.J.L., (1980) Meteorologia descritiva: Fundamentos e aplicações brasileiras, , São Paulo, NobelUNESCO-United Nations Educational, Scientific and Cultural Organization, International classification and mapping of vegetation (1973) Ecology and conservation 6., , UNESCO (ed.). Paris, UNESCOVeloso, H.P., Sistema Fitogeográfico (1992) Manual Técnico da Vegetação Brasileira, pp. 9-38. , Instituto Brasileiro de Geografia e Estatística (ed.) Rio de Janeiro, IBGEVeloso, H., Góes-Filho, L., Fitogeografia brasileira: Classificação fisionômico-ecológica da vegetação neotropical (1982) Boletim Técnico do Projeto RADAMBRASIL (Série Vegetação), 1, pp. 3-79Whitmore, T.C., Burnham, C.P., (1984) Tropical rain forests of the Far East, , 2nd. edn. Oxford, Oxford University PressWright, S.J., Plant diversity in tropical forests: A review of mechanisms of species coexistence (2002) Oecologia, 130, pp. 1-14Yamamoto, L.F., Kinoshita, L.S., Martins, F.R., Florística dos componentes arbóreo e arbustivo de um trecho da Floresta Estacional Semidecídua Montana, município de Pedreira, estado de São Paulo (2005) Revista Brasileira de Botânica, 28, pp. 191-2002Zar, J.H., (1999) Biostatiscal analysis, , 4th. edn. New Jersey, Prentice-Hal
Are markers of inflammation more strongly associated with risk for fatal than for nonfatal vascular events?
<p><b>Background:</b> Circulating inflammatory markers may more strongly relate to risk of fatal versus nonfatal cardiovascular disease (CVD) events, but robust prospective evidence is lacking. We tested whether interleukin (IL)-6, C-reactive protein (CRP), and fibrinogen more strongly associate with fatal compared to nonfatal myocardial infarction (MI) and stroke.</p>
<p><b>Methods and Findings:</b> In the Prospective Study of Pravastatin in the Elderly at Risk (PROSPER), baseline inflammatory markers in up to 5,680 men and women aged 70-82 y were related to risk for endpoints; nonfatal CVD (i.e., nonfatal MI and nonfatal stroke [n = 672]), fatal CVD (n = 190), death from other CV causes (n = 38), and non-CVD mortality (n = 300), over 3.2-y follow-up. Elevations in baseline IL-6 levels were significantly (p = 0.0009; competing risks model analysis) more strongly associated with fatal CVD (hazard ratio [HR] for 1 log unit increase in IL-6 1.75, 95% confidence interval [CI] 1.44-2.12) than with risk of nonfatal CVD (1.17, 95% CI 1.04-1.31), in analyses adjusted for treatment allocation. The findings were consistent in a fully adjusted model. These broad trends were similar for CRP and, to a lesser extent, for fibrinogen. The results were also similar in placebo and statin recipients (i.e., no interaction). The C-statistic for fatal CVD using traditional risk factors was significantly (+0.017; p<0.0001) improved by inclusion of IL-6 but not so for nonfatal CVD events (p = 0.20).</p>
<p><b>Conclusions:</b> In PROSPER, inflammatory markers, in particular IL-6 and CRP, are more strongly associated with risk of fatal vascular events than nonfatal vascular events. These novel observations may have important implications for better understanding aetiology of CVD mortality, and have potential clinical relevance.</p>
Leptin Predicts Diabetes but Not Cardiovascular Disease: Results from a large prospective study in an elderly population
OBJECTIVE—To clarify the association of circulating levels of leptin with risk for cardiovascular disease (CVD) events and new-onset diabetes in men and women
The value of the MDR1 reversal agent PSC-833 in addition to daunorubicin and cytarabine in the treatment of elderly patients with previously untreated acute myeloid leukemia (AML), in relation to MDR1 status at diagnosis
To determine whether MDR1 reversal by the addition of the P-glycoprotein
(P-gp) inhibitor PSC-833 to standard induction chemotherapy would improve
event-free survival (EFS), 419 untreated patients with acute myeloid
leukemia (AML) aged 60 years and older were randomized to receive 2
induction cycles of daunorubicin and cytarabine with or without PSC-833.
Patients in complete remission were then given 1 consolidation cycle
without PSC-833. Neither complete response (CR) rate (54% versus 48%; P =
.22), 5-year EFS (7% versus 8%; P = .53), disease-free survival (DFS; 13%
versus 17%; P = .06) nor overall survival (OS; 10% in both arms; P = .52)
were significantly improved in the PSC-833 arm. An integrated P-gp score
(IPS) was determined based on P-gp function and P-gp expression in AML
cells obtained prior to treatment. A higher IPS was associated with a
significantly lower CR rate and worse EFS and OS. There was no significant
interaction between IPS and treatment arm with respect to CR rate and
survival, indicating also a lack of benefit of PSC-833 in P-gp-positive
patients. The role of strategies aimed at inhibitory P-gp and other
drug-resistance mechanisms continues to be defined in the treatment of
patients with AML
Further Experimental Studies of Two-Body Radiative \Upsilon Decays
Continuing our studies of radiative Upsilon(1S) decays, we report on a search
for Upsilon to gamma eta and Upsilon to gamma f_{J}(2220) in 61.3 pb^{-1} of
e^{+}e^{-} data taken with the CLEO II detector at the Cornell Electron Storage
Ring. For the gamma eta search the three decays of the eta meson to
pi^{+}pi^{-}pi^{0}, pi^{0}pi^{0}pi^{0}, and gamma gamma were investigated. We
found no candidate events in the two (3\pi)^{0} modes and no significant excess
over expected backgrounds in the gamma gamma mode to set a limit on the
branching fraction of B(Upsilon to gamma eta) < 2.1 x 10^{-5} at 90% C.L. The
three charged two-body final states h h-bar (h = pi^{+}, K^{+}, p) were
investigated for f_{J}(2220) production, with one, one, and two events found,
respectively. Limits at 90% C.L. of B(\Upsilon to gamma f_{J}) x B(f_{J} to h
h-bar) ~ 1.5 x 10^{-5} have been set for each of these modes. We compare our
results to measurements of other radiative Upsilon decays, to measurements of
radiative J/psi decays, and to theoretical predictions.Comment: 19 pages postscript, also available through
http://w4.lns.cornell.edu/public/CLNS, submitted to Physical Review
Floristic variations in a woody plant community along a trail in a Semideciduous Seasonal Forest, Viçosa, Minas Gerais State, Brazil
Search for the standard model Higgs boson decaying into two photons in pp collisions at sqrt(s)=7 TeV
A search for a Higgs boson decaying into two photons is described. The
analysis is performed using a dataset recorded by the CMS experiment at the LHC
from pp collisions at a centre-of-mass energy of 7 TeV, which corresponds to an
integrated luminosity of 4.8 inverse femtobarns. Limits are set on the cross
section of the standard model Higgs boson decaying to two photons. The expected
exclusion limit at 95% confidence level is between 1.4 and 2.4 times the
standard model cross section in the mass range between 110 and 150 GeV. The
analysis of the data excludes, at 95% confidence level, the standard model
Higgs boson decaying into two photons in the mass range 128 to 132 GeV. The
largest excess of events above the expected standard model background is
observed for a Higgs boson mass hypothesis of 124 GeV with a local significance
of 3.1 sigma. The global significance of observing an excess with a local
significance greater than 3.1 sigma anywhere in the search range 110-150 GeV is
estimated to be 1.8 sigma. More data are required to ascertain the origin of
this excess.Comment: Submitted to Physics Letters
Measurement of isolated photon production in pp and PbPb collisions at sqrt(sNN) = 2.76 TeV
Isolated photon production is measured in proton-proton and lead-lead
collisions at nucleon-nucleon centre-of-mass energies of 2.76 TeV in the
pseudorapidity range |eta|<1.44 and transverse energies ET between 20 and 80
GeV with the CMS detector at the LHC. The measured ET spectra are found to be
in good agreement with next-to-leading-order perturbative QCD predictions. The
ratio of PbPb to pp isolated photon ET-differential yields, scaled by the
number of incoherent nucleon-nucleon collisions, is consistent with unity for
all PbPb reaction centralities.Comment: Submitted to Physics Letters
Community structure and comparative analysis of the woody component of a cerrado remnant in Southeastern Brazil
- …