Theodosius Dobzhansky And The Development Of Genetics In Brazil

[No abstract available]263387395de Barros, R., Aberrações cromosômicas em Drosophila mercatorum pararepleta. I. Aneuplóides expontâneos (1949) Rev. Bras. Biol., 9 (3), pp. 365-376de Barros, R., Aberrações cromosômicas em Drosophila mercatorum pararepleta. II. Uma longa duplicação expontânea adjacente e invertida (1949) Rev. Bras. Biol., 9 (4), pp. 463-466de Barros, R., Um caso de alteração na proporção entre os sexos, em Drosophila mercatorum pararepleta (1949) Cienc. Cult., 1 (3), pp. 107-110de Barros, R., A new species of the genus Drosophila, with discussion about speciation in the mercatorum sub-group (1950) Rev. Bras. Biol., 10 (3), pp. 265-278Birch, L.C., Battaglia, B., The abundance of Drosophila willistoni in relation to food in natural populations (1957) Ecology, 38 (1), pp. 165-166Birch, L.C., Battaglia, B., Selection in Drosophila willistoni in relation to food (1957) Evolution Int. J. Org. Evolution, 11, pp. 94-105Breuer, M.E., Pavan, C., Genitália masculina de Drosophila (Diptera) do grupo annulimana (1950) Rev. Bras. Biol., 10 (4), pp. 469-488Breuer, M.E., Pavan, C., Genitália masculina de Drosophila (Diptera) do grupo dreyfusi (1954) Rev. Bras. Biol., 14 (4), pp. 465-475Burla, H., Pavan, C., The calloptera group of species (1953) Rev. Bras. Biol., 13 (4), pp. 291-314Burla, H., da Cunha, A.B., Cordeiro, A.R., Dobzhansky, Th., Malogolowkin, C., Pavan, C., The willistoni group of sibling species of Drosophila (1949) Evolution Int. J. Org. Evolution, 3 (4), pp. 300-314Burla, H., da Cunha, A.B., Cavalcanti, A.G.L., Dobzhansky, Th., Pavan, C., Population density and dispersal rates in Brazilian Drosophila willistoni (1950) Ecology, 31 (3), pp. 393-404Carson, H.L., Interfertile sibling species in the willistoni group of Drosophila (1954) Evolution Int. J. Org. Evolution, 8, pp. 148-165da Cunha, A.B., Polymorphism in natural populations of a species of Drosophila (1946) J. Hered., 37 (8), pp. 253-257da Cunha, A.B., Genetic analysis of the polymorphism of color pattern in Drosophila polymorpha (1949) Evolution Int. J. Org. Evolution, 3 (3), pp. 239-251da Cunha, A.B., Contribuição ao estudo do polimorfismo (1951) Bol. Fac. Filos. Cienc. Letras Univ. São Paulo, 131, pp. 1-58. , (Biol Geral 9)da Cunha, A.B., Modification of the adaptive values of chromosomal types in Drosophila pseudoobscura by nutritional variables (1951) Evolution Int. J. Org. Evolution, 5 (4), pp. 395-404da Cunha, A.B., A further analysis of the polymorphism of Drosophila polymorpha (1953) Nature, 171, p. 887da Cunha, A.B., Chromosomal inversions with sex-limited effects (1953) Nature, 172, pp. 815-816da Cunha, A.B., Chromosomal polymorphism in the Diptera (1955) Adv. Genet., 7, pp. 93-138da Cunha, A.B., Sobre duas raças de Drosophila neocardini Streisinger (Drosophilidae, Diptera) (1955) Rev. Bras. Biol., 15 (1), pp. 117-125da Cunha, A.B., Adaptation of carriers of different chromosomal types in Drosophila willistoni to a variety of environments (1956) Rev. Bras. Biol., 16, pp. 263-272da Cunha, A.B., Differential viability favoring inversion heterozygotes in Drosophila willistoni (1956) Evolution Int. J. Org. Evolution, 10 (3), pp. 231-234da Cunha, A.B., Contribuição ao estudo da adaptação das populações de Drosophila (Diptera) a diferentes levedos (1957) Bol. Fac. Filos. Cienc. Letras Univ. São Paulo, 220, pp. 1-60. , (Biol Geral 10)da Cunha, A.B., Chromosomal variation and adaptation in insects (1960) Annu. Rev. Entomol., 5, pp. 85-110da Cunha, A.B., Maintenance of the lethal and detrimental genes in natural populations (1968) Proceedings 12th International Congress of Genetics, Tokyo, 2, pp. 162-164da Cunha, A.B., Dobzhansky, Th., A further study of chromosomal polymorphism in Drosophila willistoni and its relation to the environment (1954) Evolution Int. J. Org. Evolution, 8 (2), pp. 119-134da Cunha, A.B., Kerr, W.E., A genetical hypothesis to explain sex-determination by arrhenotokous parthenogenesis (1956) Forma et Functio., 1, pp. 33-36da Cunha, A.B., Pavan, C., O futuro biológico do homem (1967) An. Acad. Bras. Cienc., 39 (SUPPL.), pp. 7-15da Cunha, A.B., Burla, H., Dobzhansky, Th., Adaptive chromosomal polymorphism in Drosophila willistoni (1950) Evolution Int. J. Org. Evolution, 4 (3), pp. 212-235da Cunha, A.B., Dobzhansky, Th., Sokoloff, A., On food preferences of sympatric species of Drosophila (1951) Evolution Int. J. Org. Evolution, 5 (2), pp. 91-101da Cunha, A.B., Brncic, D., Salzano, F.M., A comparative study of chromosomal polymorphism in certain South-American species of Drosophila (1953) Heredity, 7 (2), pp. 193-202da Cunha, A.B., El-Tabey Shehata, A., de Oliveira, W., A study of the diets and nutritional preferences of tropical species of Drosophila (1957) Ecology, 38 (1), pp. 98-106da Cunha, A.B., Dobzhansky, Th., Pavlovsky, O., Spassky, B., Genetics of natural populations XXVIII. Supplementary data on the chromosomal polymorphism in Drosophila willistoni and its relation to the environment (1959) Evolution Int. J. Org. Evolution, 13, pp. 389-404da Cunha, A.B., de Toledo, J.S., Pavan, C., de Souza, H.L., Melara, H.E., Gabrusewycz, N., Gama, M.R., de Mello, L.C., A comparative analysis of the effects of natural and of radiation-induced lethals in heterozygous individuals and their frequencies in natural populations of Drosophila willistoni (1959) Progress in Nuclear Energy, Series VI, Biological Sciences, 2, pp. 359-363. , Also in Proceedings of the Second United Nations International Conference on the Peaceful Uses of Atomic Energy 22:330-332da Cunha, A.B., de Toledo, J.S., Pavan, C., de Souza, H.M.L., Gabrusewycz, N., Gama, M.R., Análise comparativa dos comportamentos de gens letais naturais e de gens letais induzidos por radiação em populações naturais (1960), Atas do II Simpósio Interamericano para Usos Pacíficos da Energia Nuclear, Buenos Airesda Cunha, A.B., de Magalhães, L.E., de Toledo, J.S., Toledo Filho, S.A., de Souza, H.M.L., On the origin of new lethal chromosomes and its rate in laboratory populations of Drosophila willistoni (1966) Mutat. Res., 3, p. 460. , 458da Cunha, A.B., França, Z.M., Gonçalves, A.M.A., Hitelman, A., Garrido, M.C., Chromosomal diseases in Drosophila willistoni Sturtevant (1967) Rev. Bras. Biol., 27, pp. 113-124Dobzhansky, Th., da Cunha, A.B., Differentiation of nutritional preferences in Brazilian Drosophila (1955) Ecology, 36, pp. 34-39Dobzhansky, Th., Dreyfus, A., Chromosomal aberrations in Brazilian Drosophila ananassae (1943) Proc. Natl. Acad. Sci. USA, 29 (10), pp. 301-305Dobzhansky, Th., Pavan, C., Studies on Brazilian species of Drosophila (1943) Bol. Fac. Filos. Cienc. Letras Univ. São Paulo, 36, pp. 7-72. , (Biol Geral 4 + 7 platesDobzhansky, Th., Pavan, C., Chromosome complements of some South-Brazilian species of Drosophila (1943) Proc. Natl. Acad. Sci. USA, 29 (11), pp. 368-375Dobzhansky, Th., Pavan, C., Local and seasonal variations in relative frequencies of species of Drosophila in Brazil (1950) J. Anim. Ecol., 19 (1), pp. 1-14Dobzhansky, Th., Burla, H., da Cunha, A.B., A comparative study of chromosomal polymorphism in sibling species of the willistoni group of Drosophila (1950) Am. Nat., 89, pp. 229-246Dreyfus, A., Analysis of sexual isolation between Drosophila paranaensis and D. pararepleta (1951) Proc. of the Eighth International Congress of Genetics, (SUPPL.), pp. 564-565. , HereditasDreyfus, A., de Barros, R., Mutations chromosomiques chez les hybrides de Drosophila mercatorum pararepleta x D. paranaensis (1948) São Paulo Médico, 1, pp. 11-18Dreyfus, A., de Barros, R., Sex-ratio chez certains hybrides interspécifiques de Drosophila et son interprétation par l'analyse des chromosomes salivaires (1949), pp. 94-104. , Symposium sui fattori ecologici e genetici della speciazione negli animali. Suppl. A "La Ricerca Scientifica"França, Z.M., da Cunha, A.B., Crossing-over between heterozygous inversions and its relation with polymorphism in Drosophila willistoni (1968) Rev. Bras. Biol., 28, pp. 495-497França, Z.M., da Cunha, A.B., Garrido, M.C., Recombination in Drosophila willistoni (1968) Heredity, 23, pp. 199-204Freire-Maia, N., Sobre os cromossomos de Drosophila montium (1947) Bol. Fac. Filos. Ciene Letras Univ. São Paulo, 86, pp. 3-19. , (Biol Geral 7)Freire-Maia, N., Balanced polymorphism in Drosophila montium (1949) Evolution Int. J. Org. Evolution, 3, p. 98Frydenberg, O., Two new species of Drosophila from Peru (Drosophilidae, Diptera) (1956) Rev. Bras. Entomol., 6, pp. 57-64Ives, P.T., The genetic structure of American populations of Drosophila melanogaster (1945) Genetics, 30, pp. 167-196de Magalhães, L.E., Description of four new species of the saltans group of Drosophila (Diptera) (1956) Rev. Bras. Biol., 16 (3), pp. 273-280de Magalhães, L.E., Björnberg, A.J.S., Estudo da genitália masculina de Drosophila (Diptera) do grupo saltans (Diptera) (1957) Rev. Bras. Biol., 17 (4), pp. 435-450de Magalhães, L.E., de Toledo, J.S., da Cunha, A.B., The nature of lethals in Drosophila willistoni (1965) Genetics, 53, pp. 559-608de Magalhães, L.E., da Cunha, A.B., de Toledo, J.S., Toledo Filho, S.A., de Souza, H.L., Targa, H.J., Setzer, V., Pavan, C., On lethals and their suppressors in experimental populations of Drosophila willistoni (1965) Mutat. Res., 2, pp. 45-54Patterson, J.T., Pavan, C., Drosophila fulvimacula flavorepleta subsp. nov (1952) Univ. Tex. Publ., pp. 114-128. , Patterson JT (ed) A pair of allopatric subspecies belonging to the repleta species group 5204Pavan, C., Chromosomal variations in Drosophila nebulosa (1946) Genetics, 31, pp. 546-557Pavan, C., Two types of heterochromatin in Drosophila nebulosa (1946) Proc. Natl. Acad. Sci. USA, 32 (5), pp. 137-145Pavan, C., Espécies brasileiras de Drosophila II (1950) Bol. Fac. Filos. Cienc. Letras Univ. São Paulo, 111, pp. 1-37. , (Biol Geral 8)Pavan, C., Relações entre populações naturais de Drosophila e o meio ambiente (1952), Cathedra Thesis, Universidade de São Paulo, São PauloPavan, C., Breuer, M.E., Two new species of Drosophila (Diptera) of the dreyfusi group (Diptera) (1954) Rev. Bras. Biol., 14 (4), pp. 459-463Pavan, C., da Cunha, A.B., Espécies brasileiras de Drosophila (1947) Bol. Fac. Filos. Cienc. Letras Univ. São Paulo, 86, pp. 20-64. , (Biol Geral 7)Pavan, C., da Cunha, A.B., Os efeitos genéticos das radiações (1967) An. Acad. Bras. Cienc., 39 (SUPPL.), pp. 115-128Pavan, C., Knapp, E.P., The genetic population structure of Brazilian Drosophila willistoni (1954) Evolution Int. J. Org. Evolution, 8 (4), pp. 303-313Pavan, C., Nacrur, J., Duas novas espécies de Drosophila (Diptera) do grupo annulimana (1950) Dusenia, 1 (5), pp. 263-274Pavan, C., Cordeiro, A.R., Dobzhansky, N., Dobzhansky, Th., Malogolowkin, C., Spassky, B., Wedel, M., Concealed genetic variability in Brazilian populations of Drosophila willistoni (1951) Genetics, 36, pp. 13-30Pavan, C., Dobzhansky, Th., da Cunha, A.B., Heterosis and elimination of weak homozygotes in natural populations of three related species of Drosophila (1957) Proc. Natl. Acad. Sci. USA, 43 (2), pp. 226-234de Souza, H.M.L., da Cunha, A.B., dos Santos, E.P., Assortative mating in polymorphic laboratory populations of Drosophila willistoni (1966) Egypt J. Genet. Cytol., 1, pp. 225-280de Souza, H.M.L., da Cunha, A.B., dos Santos, E.P., Adaptive polymorphism developed in laboratory populations of Drosophila willistoni (1968) Am. Nat., 102, pp. 583-586de Souza, H.M.L., da Cunha, A.B., dos Santos, E.P., Adaptive polymorphism of behavior evolved in laboratory populations of Drosophila willistoni (1970) Am. Nat., 104, pp. 175-189de Toledo, J.S., de Magalhães, L.E., da Cunha, A.B., An effect of change of environment on the frequencies of the lethal chromosomes in Drosophila willistoni (1966) Am. Nat., 100, pp. 693-696Wallace, B., Allelism of second chromosome lethals in Drosophila melanogaster (1950) Proc. Natl. Acad. Sci. USA, 36, pp. 654-65

Structure-antifouling activity relationship and molecular targets of bio-inspired(Thio)xanthones

The development of alternative ecological and effective antifouling technologies is still challenging. Synthesis of nature-inspired compounds has been exploited, given the potential to assure commercial supplies of potential ecofriendly antifouling agents. In this direction, the antifouling activity of a series of nineteen synthetic small molecules, with chemical similarities with natural products, were exploited in this work. Six (4, 5, 7, 10, 15 and 17) of the tested xanthones showed in vivo activity toward the settlement of Mytilus galloprovincialis larvae (EC50: 3.53–28.60 µM) and low toxicity to this macrofouling species (LC50 > 500 µM and LC50/EC50: 17.42–141.64), and two of them (7 and 10) showed no general marine ecotoxicity (<10% of Artemia salina mortality) after 48 h of exposure. Regarding the mechanism of action in mussel larvae, the best performance compounds 4 and 5 might be acting by the inhibition of acetylcholinesterase activity (in vitro and in silico studies), while 7 and 10 showed specific targets (proteomic studies) directly related with the mussel adhesive structure (byssal threads), given by the alterations in the expression of Mytilus collagen proteins (PreCols) and proximal thread proteins (TMPs). A quantitative structure-activity relationship (QSAR) model was built with predictive capacity to enable speeding the design of new potential active compounds.This research was supported by national funds through FCT - Foundation for Science and Technology within the scope of UIDB/04423/2020 and UIDP/04423/2020 and under the project PTDC/AAG-TEC/0739/2014 (reference POCI-01-0145-FEDER-016793) supported through national funds provided by FCT and ERDF - European Regional Development Fund through the COMPETE - Programa Operacional Factores de Competitividade (POFC) programme and RIDTI - Reforçar a Investigação, o Desenvolvimento Tecnológico e a Inovação (project 9471) and the project NASCEM PTDC/BTA-BTA/31422/2017 (POCI-01-0145-FEDER-031422) also financed by FCT, COMPETE2020 and PORTUGAL2020

Matrix Model and Time-like Linear Dilaton Matter

We consider a matrix model description of the 2d string theory whose matter part is given by a time-like linear dilaton CFT. This is equivalent to the c=1 matrix model with a deformed, but very simple fermi surface. Indeed, after a Lorentz transformation, the corresponding 2d spacetime is a conventional linear dilaton background with a time-dependent tachyon field. We show that the tree level scattering amplitudes in the matrix model perfectly agree with those computed in the world-sheet theory. The classical trajectories of fermions correspond to the decaying D-branes in the time-like linear dilaton CFT. We also discuss the ground ring structure. Furthermore, we study the properties of the time-like Liouville theory by applying this matrix model description. We find that its ground ring structure is very similar to that of the minimal string.Comment: 30 pages, harvmac, typos corrected, acknowledgements and comments added(v2), published version (v3

Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at sqrt(s) = 7 TeV with the ATLAS experiment

This paper describes an analysis of the angular distribution of W->enu and W->munu decays, using data from pp collisions at sqrt(s) = 7 TeV recorded with the ATLAS detector at the LHC in 2010, corresponding to an integrated luminosity of about 35 pb^-1. Using the decay lepton transverse momentum and the missing transverse energy, the W decay angular distribution projected onto the transverse plane is obtained and analysed in terms of helicity fractions f0, fL and fR over two ranges of W transverse momentum (ptw): 35 < ptw < 50 GeV and ptw > 50 GeV. Good agreement is found with theoretical predictions. For ptw > 50 GeV, the values of f0 and fL-fR, averaged over charge and lepton flavour, are measured to be : f0 = 0.127 +/- 0.030 +/- 0.108 and fL-fR = 0.252 +/- 0.017 +/- 0.030, where the first uncertainties are statistical, and the second include all systematic effects.Comment: 19 pages plus author list (34 pages total), 9 figures, 11 tables, revised author list, matches European Journal of Physics C versio

Observation of a new chi_b state in radiative transitions to Upsilon(1S) and Upsilon(2S) at ATLAS

The chi_b(nP) quarkonium states are produced in proton-proton collisions at the Large Hadron Collider (LHC) at sqrt(s) = 7 TeV and recorded by the ATLAS detector. Using a data sample corresponding to an integrated luminosity of 4.4 fb^-1, these states are reconstructed through their radiative decays to Upsilon(1S,2S) with Upsilon->mu+mu-. In addition to the mass peaks corresponding to the decay modes chi_b(1P,2P)->Upsilon(1S)gamma, a new structure centered at a mass of 10.530+/-0.005 (stat.)+/-0.009 (syst.) GeV is also observed, in both the Upsilon(1S)gamma and Upsilon(2S)gamma decay modes. This is interpreted as the chi_b(3P) system.Comment: 5 pages plus author list (18 pages total), 2 figures, 1 table, corrected author list, matches final version in Physical Review Letter

Search for displaced vertices arising from decays of new heavy particles in 7 TeV pp collisions at ATLAS

We present the results of a search for new, heavy particles that decay at a significant distance from their production point into a final state containing charged hadrons in association with a high-momentum muon. The search is conducted in a pp-collision data sample with a center-of-mass energy of 7 TeV and an integrated luminosity of 33 pb^-1 collected in 2010 by the ATLAS detector operating at the Large Hadron Collider. Production of such particles is expected in various scenarios of physics beyond the standard model. We observe no signal and place limits on the production cross-section of supersymmetric particles in an R-parity-violating scenario as a function of the neutralino lifetime. Limits are presented for different squark and neutralino masses, enabling extension of the limits to a variety of other models.Comment: 8 pages plus author list (20 pages total), 8 figures, 1 table, final version to appear in Physics Letters