1,724,895 research outputs found
Potencial Citogenotóxico da Rodamina B em Tradescantia (clone BNL 4430)
No full textProjeto acadêmico (graduação) - Universidade Federal de Santa Catarina. Campus Curitibanos. Ciências Rurais.O Estado de Santa Catarina apresenta um polo industrial diversificado com a presença de atividades têxteis, papel e celulose, agroindustrial e madeireira. Estas indústrias geram efluentes que podem prejudicar ambientalmente as áreas em seu entorno, a exemplo dos resíduos de uso de compostos xantenos para tingimento, como a Rodamina B. Desta forma, poderia este corante causar efeitos mutagênicos e/ou citogenotóxicos para plantas? Para a avaliação de potencialidade tóxica de poluentes são utilizados bioensaios com plantas superiores, uma vez que são eficazes na detecção de substâncias tóxicas por serem extremamente sensíveis e de baixo custo. O efeito tóxico da Rodamina B em células vegetais, pode ser investigado através de testes de citogenotoxicidade em Tradescantia (clone BNL 4430), uma espécie modelo comumente empregada em estudos de biomonitoramento. O objetivo deste trabalho será a avaliação do efeito citogenotóxico do corante Rodamina B em células de planta modelo Tradescantia clone BNL 4430, através da aplicação de testes citogenéticos, como o bioensaio do pêlo estaminal (TRAD-TSH) e o teste de micronúcleo (TRAD-MCN). Para isto, hastes do clone serão submetidas a água destilada (controle negativo), a 10μg/mL de solução de formaldeído (controle positivo) e 3 concentrações diferentes de Rodamina B (2,5μg/mL; 5μg/mL; 10μg/mL). Para a obtenção de imagens será utilizado o microscópio de epifluorescência Olympus BX-60 acoplado com câmera digital Olympus DP73. Os dados serão avaliados através da análise de variância e as médias serão comparadas por meio do teste Scott-Knott, utilizando o programa estatístico (Sisvar 4.0) ao nível de significância de 5%. Espera-se contribuir com informações relevantes quanto aos efeitos citogenotóxicos para alertar usuários desse corante e para o tratamento correto desses efluentes
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[4430 building]
No full textPhotograph of the side of a building with "4430" painted on its side
Two-body open charm decays of Z(+)(4430)
No full textThe two-body open charm decays Z(+)(4430)-> D(+)(D) over bar*(0), D*(+)(D) over bar (0), D*(+)(D) over bar*(0) occur through the rescattering mechanism and their branching ratios are strongly suppressed if Z(+)(4430) is a D(1)(D) over bar* molecular state. In contrast, Z(+)(4430) falls apart into these modes easily with large phase space and they become the main decay modes if Z(+)(4430) is a tetraquark state. Experimental search of these two-body open charm modes and the hidden charm mode chi(cJ)rho will help distinguish different theoretical schemes.Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)0ARTICLE11null7
Modifications on parameters of Z(4430) in a dense medium
No full textThe charmonium-like resonance Z(c)(3900) and its excited state Z(4430) are among the particles that are serious candidates for double heavy tetraquarks. Calculations of different parameters associated with these states both in the vacuum and the medium with finite density are of great importance. Such investigations help us clarify their nature, internal quark-gluon organization and quantum numbers. In this accordance, we extend our previous analyses on the ground state Z(c)(3900) to investigate the medium modifications on different parameters of the excited Z(4430) state. In particular, we calculate the mass, vector self-energy and current coupling of Z(4430) in terms of density, up to a density comparable to the density of the cores of massive neutron stars. The obtained results may help experimental groups aiming to study the behavior of exotic states at higher densities. (C) 2020 The Author(s). Published by Elsevier B.V.TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [119F094]The authors thank TUBITAK for the partial support provided under the Grant No. 119F094
Is Z(+)(4430) a loosely bound molecular state?
No full textSince Z(+)(4430) lies very close to the threshold of D*(D) over bar (1), we investigate whether Z(+)(4430) could be a loosely bound S-wave state of D*(D) over bar (1) or D*(D) over bar (1)' with J(P)=0(-),1(-),2(-), i.e., a molecular state arising from the one-pion-exchange potential. The potential from the crossed diagram is much larger than that from the diagonal scattering diagram. With various trial wave functions, we notice that the attraction from the one-pion-exchange potential alone is not strong enough to form a bound state with realistic pionic coupling constants deduced from the decay widths of D(1) and D(1)'.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000253764700017&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)32ARTICLE3null7
Is the Z+(4430) a radially excited state of Ds?
No full textAbstractWe present the interpretation that the recently discovered Z+(4430) by the Belle Collaboration can be a radial excitation of the cs¯ state, being consistent with an observed value of the product of branching ratios, B(B0→K∓Z±(4430))×B(Z±(4430)→π±ψ′)∼10−5. We give an explicit cs¯ candidate for this state by calculating the mass value in our semirelativistic quark potential model and also give a natural understanding for the facts that the decay mode Z→J/ψπ+ has not yet been seen while Z→ψ′π can be seen
Southern Pacific (SP) 4430 on "The Coaster"
No full textA photograph postcard showing the Southern Pacific (SP) 4430 (GS-4), 4-8-4, on passenger train No. 70, "The Coaster", at Chatsworth, CA, 17 cars, 40 mph. Semi-streamlined oil burner
Platter bowl S/8269/4429+4430 adorned with red slip.
No full textPlatter bowl S/8269/4429+4430 adorned with red slip.</p
Treating Z(c)(3900) and Z(4430) as the ground state and first radially excited tetraquarks
No full textAzizi, Kazem (Doğuş Author)Exploration of the resonances Z(c)(3900) and Z(4430) are performed by assuming that they are the ground state and first radial excitation of the same tetraquark with J(P) = 1(+). The mass and current coupling of the Zc(3900) and Z(4430) states are calculated using the QCD two-point sum rule method by taking into account vacuum condensates up to eight dimensions. We investigate the vertices Z(c)M(h)M(l) and ZM(h)M(l), with M-h and M-l being the heavy and light mesons and evaluate the strong couplings g(ZcMhMl) and g(ZMhMl) using the QCD sum rule on the light cone. The extracted couplings allow us to find the partial width of the decays Z(c)(3900)-> J/psi pi, psi'pi, eta(c)rho and Z(4430)-> psi'pi, J/psi pi, eta'(c)rho, eta(c)rho which may help in comprehensive investigation of these resonances. We compare the width of the decays of Z(c)(3900) and Z(4430) resonances with available experimental data as well as existing theoretical predictions
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