Aharonov-Bohm Effect in Cyclotron and Synchrotron Radiations

We study the impact of Aharonov-Bohm solenoid on the radiation of a charged particle moving in a constant uniform magnetic field. With this aim in view, exact solutions of Klein-Gordon and Dirac equations are found in the magnetic-solenoid field. Using such solutions, we calculate exactly all the characteristics of one-photon spontaneous radiation both for spinless and spinning particle. Considering non-relativistic and relativistic approximations, we analyze cyclotron and synchrotron radiations in detail. Radiation peculiarities caused by the presence of the solenoid may be considered as a manifestation of Aharonov-Bohm effect in the radiation. In particular, it is shown that new spectral lines appear in the radiation spectrum. Due to angular distribution peculiarities of the radiation intensity, these lines can in principle be isolated from basic cyclotron and synchrotron radiation spectraComment: 38 pages, LaTex fil

Low-energy excitations in the three-dimensional random-field Ising model

The random-field Ising model (RFIM), one of the basic models for quenched disorder, can be studied numerically with the help of efficient ground-state algorithms. In this study, we extend these algorithm by various methods in order to analyze low-energy excitations for the three-dimensional RFIM with Gaussian distributed disorder that appear in the form of clusters of connected spins. We analyze several properties of these clusters. Our results support the validity of the droplet-model description for the RFIM.Comment: 10 pages, 9 figure

Camperdown Hemoglobin Associated With β° Thalassemia In A Brazilian Child

We report the coexistence of Hb Camperdown [β 104 (G6) Arg → Ser] and β°-thalassemia [β39 (Gln → stop codon)] in a nine-month-old Brazilian boy. He had a relatively more severe hypochromic and microcytic anemia in comparison to his mother's β-thalassemia trait. His Hb Camperdown heterozygous father was clinically and hematologically normal. To our knowledge, this is the first description of an association of β°-thalassemia with Hb Camperdown. Copyright by the Brazilian Society of Genetics.283394396Araújo, A.S., Silva, W.A., Leao, S.A., Bandeira, F.C., Petrou, M., Modell, B., Zago, M.A., A different molecular pattern of β-thalassemia mutations in Northeast of Brazil (2003) Hemoglobin, 27, pp. 211-217Amone, A., X-ray diffraction study of binding of 2,3-diphosphoglycerate to human deoxyhemoglobin (1972) Nature, 237, pp. 146-149Bertuzzo, C.S., Sonati, M.F., Costa, F.F., Hematological phenotype and the type of β thalassemia mutation in Brazil (1997) Braz J Genet, 20, pp. 319-321Bianco, I., Graziani, B., Carboni, C., Genetic patterns in thalassemia intermedia (constitutional microcytic anemia). Familial hematological and biosynthetic studies (1977) Hum Hered, 27, pp. 257-272Blouquit, Y., Lacombe, C., Arous, N., Le Qurrec, A., Branconnier, F., Bonhomme, J., Soummer, A.M., Galacteros, F., Seven new cases of hemoglobin Camperdown alpha 2 beta 2 104 (G6) ARG → SER found in Malta, Sicily and Tunisia (1984) Hemoglobin, 8, pp. 613-619Chang, J.C., Kan, Y.W., β°-thalassemia, a nonsense mutation in man (1979) Proc Natl Acad Sci USA, 76, pp. 2886-2889Clarke, G.M., Higgins, T.N., Laboratory investigation of hemoglobinopathies and thalassemias: Review and update (2000) Clin Chem, 46, pp. 1284-1290Fonseca, S.F., Kerbauy, J., Escrivçao, C., Figueiredo, M.S., Cançado, R., Arruda, V.R., Saad, S.T.O., Costa, F.F., Genetic analysis of beta-thalassemia major and beta-thalassemia intermedia in Brazil (1998) Hemoglobin, 22, pp. 197-207Grignoli, C.R.E., Carvalho, M.H., Kimura, E.M., Sonati, M.F., Arruda, V.R., Saad, S.T.O., Costa, F.F., β°-thalassemia resulting from a novel mutation: β66/u → stop codon (2000) Eur J Haematol, 64, pp. 137-138Kimura, E.M., Grignoli, C.R.E., Pinheiro, V.R.P., Costa, F.F., Sonati, M.F., Thalassemia intermedia as a result of heterozygosis for β°-thallassemia and αααanti3.7/αα genotype in a Brazilian patient (2003) Braz J Med Biol Res, 36, pp. 699-701Kister, J., Barbadjian, J., Blouquit, Y., Bohn, B., Galacteros, F., Poyart, C., Inhibition of oxygen-linked anion binding in Hb Camperdown [α2β2 104 (G6) ARG → SER] (1989) Hemoglobin, 13, pp. 567-578Miranda, S.R.P., Kimura, E.M., Teixeira, R.C., Bertuzzo, C.S., Ramalho, A.A., Saad, S.T.O., Costa, F.F., Hb Camperdown [α2β2 104 (G6) ARG → SER] identified by DNA analysis in a Brazilian family (1996) Hemoglobin, 20, pp. 147-153Old, J.M., Screening arid genetic diagnosis of haemoglobin disorders (2003) Blood Rev, 17, pp. 43-53Olivieri, N.F., The β-thalassemias (1999) N Engl J Med, 341, pp. 99-109Thein, S.L., Genetic insights into the clinical diversity of beta thalassaemia (2004) Br J Haematol, 124, pp. 264-274Weatherall, D.J., Clegg, J.B., Inherited haemoglobin disorders: An increasing global health problem (2001) Bull World Health Organ, 79, pp. 704-712Wilkinson, T., Chua, C.G., Carrell, R.W., Robin, H., Exner, T., Lee, K.M., Kronenberg, H., Haemoglobin Camperdown β 104(G6) Arginine leads to serine (1975) Biochim Biophys Acta, 393, pp. 195-200Zago, M.A., Costa, F.F., Hereditary hemoglobin disorders in Brazil (1985) Trans R Soc Trop Med Hyg, 79, pp. 385-38

Heavy quarkonium: progress, puzzles, and opportunities

A golden age for heavy quarkonium physics dawned a decade ago, initiated by the confluence of exciting advances in quantum chromodynamics (QCD) and an explosion of related experimental activity. The early years of this period were chronicled in the Quarkonium Working Group (QWG) CERN Yellow Report (YR) in 2004, which presented a comprehensive review of the status of the field at that time and provided specific recommendations for further progress. However, the broad spectrum of subsequent breakthroughs, surprises, and continuing puzzles could only be partially anticipated. Since the release of the YR, the BESII program concluded only to give birth to BESIII; the $B$-factories and CLEO-c flourished; quarkonium production and polarization measurements at HERA and the Tevatron matured; and heavy-ion collisions at RHIC have opened a window on the deconfinement regime. All these experiments leave legacies of quality, precision, and unsolved mysteries for quarkonium physics, and therefore beg for continuing investigations. The plethora of newly-found quarkonium-like states unleashed a flood of theoretical investigations into new forms of matter such as quark-gluon hybrids, mesonic molecules, and tetraquarks. Measurements of the spectroscopy, decays, production, and in-medium behavior of c\bar{c}, b\bar{b}, and b\bar{c} bound states have been shown to validate some theoretical approaches to QCD and highlight lack of quantitative success for others. The intriguing details of quarkonium suppression in heavy-ion collisions that have emerged from RHIC have elevated the importance of separating hot- and cold-nuclear-matter effects in quark-gluon plasma studies. This review systematically addresses all these matters and concludes by prioritizing directions for ongoing and future efforts.Comment: 182 pages, 112 figures. Editors: N. Brambilla, S. Eidelman, B. K. Heltsley, R. Vogt. Section Coordinators: G. T. Bodwin, E. Eichten, A. D. Frawley, A. B. Meyer, R. E. Mitchell, V. Papadimitriou, P. Petreczky, A. A. Petrov, P. Robbe, A. Vair

β-thalassemia Intermedia In A Brazilian Patient With - 101 (c > T) And Codon 39 (c > T) Mutations

Context: We verified molecular alterations in a 72-year-old Brazilian male patient with a clinical course of homozygous β-thalassemia intermedia, who had undergone splenectomy and was surviving without regular blood transfusions. The blood cell count revealed microcytic and hypochromic anemia (hemoglobin = 6.5 g/dl, mean cell volume = 74 ft, mean cell hemoglobin = 24 pg) and hemoglobin electrophoresis showed fetal hemoglobin = 1.3%, hemoglobin A 2 = 6.78% and hemoglobin A = 79.4%. Objective: To identify mutations in a patient with the symptoms of β-thalassemia intermedia. Design: Molecular inquiry into the mutations possibly responsible for the clinical picture described. Setting: The structural molecular biology and genetic engineering center of the Universidade Estadual de Campinas, Campinas, Brazil. Procedures: DNA extraction was performed on the patient's blood samples. The polymerase chain reaction (PCR) was done using five specific primers that amplified exons and the promoter region of the β globin gene. The samples were sequenced and then analyzed via computer programs. Results: Two mutations that cause the disease were found: -101 (C > T) and codon 39 (C > T). Conclusions: This cases represents the first description of -101 (C > T) mutation in a Brazilian population and it is associated with a benign clinical course.12112830Baysal, E., Carver, M.F.H., The beta and delta-thalassemia repository (1995) Hemoglobin., 19 (3-4), pp. 213-236Zago, M.A., Costa, F., Bottura, C., Beta-thalassemia in Brazil (1981) Braz. J. Med. Biol. Res., 14 (6), pp. 383-388Ewing, B., Green, P., Base-calling of automated sequencer traces using Phred. II Error probabilities (1998) Genome Res., 8 (3), pp. 186-194Green, P., (2002), http://bozeman.genome.washington.edu/phrap.docs/phrap.html, The Phred/Phrap/Consed System Home Page. Phrap Assembler. Available at URL September 30Gordon, D., Abajian, C., Green, P., Consed: A graphical tool for sequence finishing (1998) Genome Res., 8 (3), pp. 195-20

Influence of eNOS gene polymorphism on cardiometabolic parameters in response to physical training in postmenopausal women

The health-promoting effects of exercise training (ET) are related to nitric oxide (NO) production and/or its bioavailability. The objective of this study was to determine whether single nucleotide polymorphism of the endothelial NO synthase (eNOS) gene at positions -786T>C, G894T (Glu298Asp) and at the variable number of tandem repeat (VNTR) Intron 4b/a would interfere with the cardiometabolic responses of postmenopausal women submitted to physical training. Forty-nine postmenopausal women were trained in sessions of 30-40 min, 3 days a week for 8 weeks. Genotypes, oxidative stress status and cardiometabolic parameters were then evaluated in a double-blind design. Both systolic and diastolic blood pressure values were significantly reduced after ET, which was genotype-independent. However, women without eNOS gene polymorphism at position -786T>C (TT genotype) and Intron 4b/a (bb genotype) presented a better reduction of total cholesterol levels (-786T>C: before = 213 ± 12.1, after = 159.8 ± 14.4, Δ = -24.9% and Intron 4b/a: before = 211.8 ± 7.4, after = 180.12 ± 6.4 mg/dL, Δ = -15%), and LDL cholesterol (-786T>C: before = 146.1 ± 13.3, after = 82.8 ± 9.2, Δ = -43.3% and Intron 4b/a: before = 143.2 ± 8, after = 102.7 ± 5.8 mg/dL, Δ = -28.3%) in response to ET compared to those who carried the mutant allele. Superoxide dismutase activity was significantly increased in trained women whereas no changes were observed in malondialdehyde levels. Women without eNOS gene polymorphism at position -786T>C and Intron 4b/a showed a greater reduction of plasma cholesterol levels in response to ET. Furthermore, no genotype influence was observed on arterial blood pressure or oxidative stress status in this population.85586

Spontaneous and experimental poisoning of cattle by Palicourea aeneofusca in the region of Pernambuco and induction of conditioned food aversion

ABSTRACT: The objective of this study was to describe the epidemiological, clinical, and pathological aspects of Palicourea aeneofusca poisoning in cattle in the region of Pernambuco, Brazil and to determine if it is possible to induce food aversion by P. aeneofusca poisoning in cattle raised under extensive management conditions. To determine the occurrence of poisoning, 30 properties were visited in five municipalities of the region of Pernambuco. Three outbreaks of poisoning of cattle were monitored. To induce conditioned food aversion by the consumption of P. aeneofusca, 12 animals were randomly distributed into two groups of six animals each. Cattle were weighed and received green P. aeneofusca leaves in their trough at a dose of 35mg kg-1 body weight for spontaneous consumption. The control group (CG) animals received water (1ml kg-1 body weight) via a feeding tube after the first ingestion of the plant, while the other animals, constituting the aversion test group (ATG), underwent induced aversion with lithium chloride (LiCl - 175mg kg-1 body weight) via a feeding tube. For the ATG cattle, the aversion to P. aeneofusca induced by a single dose of LiCl persisted for 12 months. In contrast, the CG animals continued to consume the plant in all tests performed, indicating the absence of aversion. This study showed that aversive conditioning using LiCl was effective in preventing poisoning by P. aeneofusca for a period of at least 12 months

Características de frutos de pessegueiros cultivados na Zona da Mata de Minas Gerais

Este trabalho teve como objetivo avaliar características físicas e químicas de frutos de 13 cultivares de pessegueiro de polpa amarela introduzidas no pomar experimental da Universidade Federal de Viçosa (UFV), Viçosa-MG. O experimento foi conduzido durante a safra 2011, em delineamento inteiramente casualisado, com 13 tratamentos (cultivares), três repetições e 10 frutos por parcela. As cultivares 'Cerrito', 'Minasul' e 'Olímpia' apresentaram, no geral, maior peso e diâmetros de frutos. Os frutos das cultivares 'Belvedere', 'Coral', 'Rubimel' e 'Talismã' apresentaram melhor balanço entre sólidos solúveis e acidez. Maiores teores de vitamina C e de carotenoides foram encontrados nos frutos das cultivares 'Baronesa' e 'Flordaprince' e de 'Aldrigui' e 'Elberta', respectivamente