Non-Fermi-liquid behavior in the Kondo lattices induced by peculiarities of magnetic ordering and spin dynamics

A scaling consideration of the Kondo lattices is performed with account of singularities in the spin excitation spectral function. It is shown that a non-Fermi-liquid (NFL) behavior between two critical values of the bare $s-f$ coupling constant occurs naturally for complicated magnetic structures with several magnon branches. This may explain the fact that a NFL behavior takes place often in the heavy-fermion systems with peculiar spin dynamics. Another kind of a NFL-like state (with different critical exponents) can occur for simple antiferromagnets with account of magnon damping, and for paramagnets, especially with two-dimensional character of spin fluctuations. The mechanisms proposed lead to some predictions about behavior of specific heat, resistivity, magnetic susceptibility, and anisotropy parameter, which can be verified experimentally.Comment: 16 pages, RevTeX, 4 Postscript figures. Extended versio

Detection Of Salmonella Spp. By Conventional Bacteriology And By Quantitative Polymerase-chain Reaction In Commercial Egg Structures

Conventional bacteriology techniques and quantitative polymerasechain reaction (qPCR) were applied to the eggshell, albumen, and yolk of washed and unwashed commercial white and brown eggs, to detect Salmonella spp. Pooled samples of eggshells, albumen, and yolk of white and brown eggs were collected at the poultry house and at the egg-storage room. Salmonella spp. was detected by conventional bacteriology in 5.4% (21/387) of analyzed samples and in 16% (68/387) by qPCR. In the 114 unwashed white eggs samples of eggshell, albumen and yolk, the bacterium was identified in 2.6% of the eggs (3/114) by conventional bacteriology and in 13.2% (15/114) by qPCR. In the 90 samples of washed eggs, 6.7% (6/90) were contaminated as detected by conventional bacteriology and 10.0% (9/90) by qPCR. In the 81 samples of unwashed brown eggs, Salmonella spp. was detected in 6.1% of the eggs (5/81) by conventional bacteriology and 27.2% (22/81) by qPCR. In the 102 samples of brown washed eggs, 6.9% (7/102) where positive by conventional bacteriology and 35.3% (16/102) by qPCR. All samples detected as positive by conventional bacteriology were also positive by qPCR. Salmonella Agona represented 18.2% (4/22) of identified serovars, Salmonella enterica subs. enterica O: 4.5 18.2% (4/22), Salmonella Schwarzengrund 18.2% (4/22), Salmonella Cerro 13.6% (3/22), Salmonella Anatum 13.6% (3/22), Salmonella Enteritidis 9.1% (2/22), Salmonella Johannesburg 4.5% (1/22), and Salmonella Corvallis 4.5% (1/22). The qPCR method provided better detection of Salmonella spp. in commercial eggs than conventional bacteriology. The conventional egg washing and disinfection procedures are not efficient to eliminate Salmonella. © 2016, Fundacao APINCO de Ciencia e Tecnologia Avicolas. All rights reserved.18111712

Unfolding kinetics of beta-lactoglobulin induced by surfactant and denaturant: a stopped-flow/fluorescence study

The beta ->alpha transition of beta-lactoglobulin, a globular protein abundant in the milk of several mammals, is investigated in this work. This transition, induced by the cationic surfactant dodecyltrimethylammonium chloride (DTAC), is accompanied by partial unfolding of the protein. In this work, unfolding of bovine beta-lactoglobulin in DTAC is compared with its unfolding induced by the chemical denaturant guanidine hydrochloride (GnHCl). The final protein states attained in the two media have quite different secondary structure: in DTAC the alpha-helical content increases, leading to the so-called alpha-state; in GnHCl the amount of ordered secondary-structure decreases, resulting in a random coil-rich final state (denatured, or D, state). To obtain information on both mechanistic routes, in DTAC and GnHCl, and to characterize intermediates, the kinetics of unfolding were investigated in the two media. Equilibrium and kinetic data show the partial accumulation of an on-pathway intermediate in each unfolding route: in DTAC, an intermediate (I-1) with mostly native secondary structure but loose tertiary structure appears between the native (beta) and alpha-states; in GnHCl, another intermediate (I-2) appears between states beta and D. Kinetic rate constants follow a linear Chevron-plot representation in GnHCl, but show a more complex mechanism in DTAC, which acts like a stronger binding species.info:eu-repo/semantics/publishedVersio

Changes In Sexual Behavior Following A Sex Education Program In Brazilian Public Schoolsm [mudanças No Comportamento Sexual De Adolescentes De Escolas Públicas No Brasil Após Um Programa De Educação Sexual]

This paper describes an evaluation of possible changes in sexual behavior in adolescents who participated in a school-based sex education program in selected public schools in four municipalities in the state of Minas Gerais, Brazil. The program is inserted within the context of reproductive rights, deals with risks involved in unsafe sexual practices and focuses on the positive aspects of sexuality. A quasi-experimental design with pre and post-tests and a non-equivalent control group was used to evaluate the intervention. A total of 4,795 questionnaires were included in this analysis. The program succeeded in more than doubling consistent condom use with casual partners and in increasing the use of modern contraceptives during last intercourse by 68%. The intervention had no effect on age at first intercourse or on adolescents' engagement in sexual activities. The sex education program was effective in generating positive changes in the sexual behavior of adolescents, while not stimulating participation in sexual activities.25511681176(2006) Promoting and Safeguarding the Sexual and Reproductive Health of Adolescents, , World Health Organization, Geneva: World Health Organization, (Policy Brief, 4. Implementing the Global Reproductive Health Strategy)Ross, J., Godeau, E., Dias, S., Sexual health (2004) Young People's Health In Context: Health Behaviour In School-aged Children (hbsc) Study. International Report From the 2001/2002 Survey, pp. 153-60. , In: Currie C, Roberts C, Morgan A, Smith R, Settertobulte W, Samdal O, et al., editors, Copenhagen: WHO Regional Office for Europe, (Health Policy for Children and Adolescents, 4)Kirby, D.B., Laris, B.A., Rolleri, L.A., Sex and HIV education programs: Their impact on sexual behaviors of young people throughout the world (2007) J Adolesc Health, 40, pp. 206-17Figueiró, N.M.D., A produção teórica no Brasil sobre educação sexual (1996) Cad Pesqui, (98), pp. 50-63Figueiró, N.M.D., Revendo a história da educação sexual no Brasil: Ponto de partida para construção de um novo rumo (1998) Nuances, 4, pp. 123-33(1998) Temas Transversais: Orientação Sexual, , Secretaria de Educação Fundamental, Ministério da Educação. Parâmetros curriculares nacionais, Brasília: Secretaria de Educação Fundamental, Ministério da EducaçãoPaiva, V., Pupo, L.R., Barboza, R., O direito à prevenção e os desafios da redução da vulnerabilidade ao HIV no Brasil (2006) Rev Saúde Pública, 40 (SUPPL.), pp. 109-19Hughes, J., McCauley, A.P., Improving the fit: Adolescents' needs and future programs for sexual and reproductive health in developing countries (1998) Stud Fam Plann, 29, pp. 233-45Díaz, M., Mello, M.B., Sousa, M.H., Cabral, F., Silva, R.C., Campos, M., Et al., Outcomes of three different models for sex education and citizenship programs concerning knowledge, attitudes, and behavior of Brazilian adolescents (2005) Cad Saúde Pública, 21, pp. 589-97(1999) Projeto Educação Afetivo-sexual: Sucessos E Desafios Na Educação Sexual De Adolescentes Da Rede Pública Estadual De Ensino De Belo Horizonte - Relatório Da Avaliação Externa, , Centro de Pesquisas em Saúde Reprodutiva de Campinas/Fundação Odebrecht, Campinas: Centro de Pesquisas em Saúde Reprodutiva de Campinas/Salvador: Fundação OdebrechtCosta, A.C.G., (2000) Protagonismo Juvenil: Adolescência, Educação E Participação Democrática, , Salvador: Fundação OdebrechtAndrade, H.H.S.M., Marques, C.M., Gouveia, M.C., Gregório, Y.M., Atendimento ambulatorial de adolescentes: A experiência do PAIA/ABEB (1996) J Pediatr (rio J), 72, pp. 319-23Cronbach, L.J., Coefficient alpha and the internal structure of tests (1951) Psychometrika, 16, pp. 297-334Mello, M.B., Fruet, M.S.B., Diaz, M., Silva, R.C., Paiva, V., Avaliação preliminar de impactos de um programa de orientação sexual de longa duração (1999) Anais Do Vii Congresso Brasileiro De Sexualidade Humana, p. 74. , Rio de Janeiro: Sociedade Brasileira de Estudos em Sexualidade HumanaFleiss, J.L., (1981) Statistical Methods For Rates and Proportions, , 2nd Ed. New York: John Wiley and SonsBertrand, J.T., Magnani, R.J., Rutenberg, N., (1996) Evaluating Family Planning Programs: With Adaptations For Reproductive Health, , Chapel Hill: Carolina Population Center, University of North Carolina at Chapel HillHosmer, D.W., Lemeshow, S., (1989) Applied Logistic Regression, , New York: John Wiley and SonsGrunseit, A., Kippax, S., (1997) Impact of Hiv and Sexual Health Education On the Sexual Behaviour of Young People: A Review Update, , Geneva: United Nations Joint Programme on HIV/AIDSKirby, D., (1995) A Review of Educational Programs to Designed to Reduce Sexual Risk-taking Behaviors Among School-aged Youth In the United States, , Santa Cruz: ETR AssociatesKirby, D., (2001) Emerging Answers: Research Findings On Programs to Reduce Teen Pregnancy, , Washington DC: National Campaign to Prevent Teen PregnancyAntunes, M.C., Peres, C.A., Paiva, V., Stall, R., Hearst, N., Diferenças na prevenção da AIDS entre homens e mulheres jovens de escolas públicas em São Paulo, SP (2002) Rev Saúde Pública, 36 (4 SUPPL.), pp. 88-95Magnani, R.J., Gaffikin, L., Aquino, E.M.L., Seiber, E.E., Almeida, M.C.C., Lipovsek, V., Impact of an integrated adolescent reproductive health program in Brazil (2001) Stud Fam Plann, 32, pp. 230-43Taquette, S.R., Vilhena, M.M., Paula, M.C., Doenças sexualmente transmissíveis e gênero: Um estudo transversal com adolescentes no Rio de Janeiro (2004) Cad Saúde Pública, 20, pp. 282-90Oliveira, F.A., Pfleger, V., Lang, K., Heukelbach, J., Miralles, I., Fraga, F., Sexually transmitted infections, bacterial vaginosis, and candidiasis in women of reproductive age in rural Northeast Brazil: A population-based study (2007) Mem Inst Oswaldo Cruz, 102, pp. 751-6(1999) Adolescentes, Jovens E a Pesquisa Nacional Sobre Demografia E Saúde: Um Estudo Sobre Fecundidade, Comportamento Sexual E Saúde Reprodutiva, , Bem-Estar Familiar no Brasil, Rio de Janeiro: Bem-Estar Familiar no BrasilAlmeida, M.C., Aquino, E.M., Barros, A.P., School trajectory and teenage pregnancy in three Brazilian state capitals (2006) Cad Saúde Pública, 22, pp. 1397-409Chalem, E., Mitsuhiro, S.S., Ferri, C.P., Barros, M.C.M., Guinsburg, R., Laranjeira, R., Gravidez na adolescência: Perfil sócio-demográfico e comportamental de uma população da periferia de São Paulo (2007) Brasil. Cad Saúde Pública, 23, pp. 177-86Baraldi, A.C.P., Daud, Z.P., Almeida, A.M., Gomes, F.A., Nakano, A.M.S., Adolescent pregnancy: A comparative study between mothers who use public and private health systems (2007) Rev Latinoam Enferm, 15, pp. 799-805. , (Spe

Avaliação do Risco de Desenvolvimento de Problemas Relacionados com Medicamentos em Pacientes de Baixa Renda Atendidos em uma Clínica-Escola

No posee resumen.Colegio de Farmacéuticos de la Provincia de Buenos Aire

Covalent and noncovalent hybrids of di-amino porphyrin functionalized graphene oxide and their interaction with gold nanoparticles

Porphyrin functionalization of graphene oxide (GO) influenced the plasmonic effect of gold nanoparticles (AuNP). The former was achieved by modification of GO with 5,10-bis(4-aminophenyl)-15,20-diphenylpor-phyrin, P(NH2)2,adj, by noncovalent interactions as well as by covalent association, following standard chemis-try. The success of the chemical functionalization of GO with P(NH2)2,adj, was confirmed by FTIR. Steady-state and time-resolved fluorescence showed a strong fluorescence quenching of porphyrin in the presence of GO, indicative of a photoinduced electron transfer process from porphyrin units to GO, which acts as an electron acceptor. The surface plasmon coupling effect promoted by the AuNP@GO hybrids, proved to be effective only in the case of the noncovalent hybrid, detected through the decrease of the porphyrin fluorescence lifetime and increase in the emission intensity in solution, in good agreement with FLIM results on deposited samples.info:eu-repo/semantics/publishedVersio

Effect Of Pasteurization On The Decay Of Mycobacterium Bovis In Milk Cream

Milk cream must be pasteurized in order to be sold in Brazil. However, there are no specific legal requirements for this product, and producers set their own pasteurization parameters using the ones approved for milk as a reference. Considering that fat protects bacteria from heat, that no thermal inactivation studies have been performed on Mycobacterium bovis present in cream, and that bovine tuberculosis is endemic in Brazil, the aim of this study was to evaluate the inactivation of M. bovis in milk cream subjected to commercial parameters of pasteurization. Milk cream samples were contaminated and pasteurized in a water bath at 75, 80, 85, and 90°C for 5 and 15 s. M. bovis cells were plated onto Stonebrink-Leslie medium, incubated at 36°C for 45 days, and quantified; the result was expressed in log CFU mL-1. The fat content of the samples ranged from 34% to 37% and the average initial load of M. bovis was 8.0 Log CFU mL-1. The average decay of the M. bovis populations was 4.0, 4.3, 4.9 and 6.7 log CFU mL-1 when the cream was treated for 15 sec at 75, 80, 85 and 90°C, respectively, showing that the efficiency of the heat treatment was improved by increasing the temperature of the process. Given the lipophilic nature of M. bovis, the cream should be subjected to more intense parameters of pasteurization than those applied to milk.3753737374

TOPOGRAFIA DO CONE MEDULAR EM UM GATO MOURISCO, Herpailurus yagouaroundi (Severtzow, 1858)(FELIDAE)

A anestesia caudal foi proposta pela primeira vez em 1926 e diversas técnicas foram desenvolvidas para anestesiar os nervos espinhais lombares e sacrais. Os métodos para anestesia epidural exigem conhecimento da anatomia da região envolvida. O objetivo deste estudo foi determinar a topografia do cone medular do gato mourisco, tornando possível a realização desta técnica anestésica em um felino silvestre de nossa fauna. Uma gata mourisca, adulta, proveniente do Zoológico Parque do Sabiá, Uberlândia-MG, foi encaminhado ao Laboratório de Pesquisa em Animais Silvestres (LAPAS), com o objetivo de determinar a topografia do cone medular para tornar possível a realização desta técnica anestésica em um felino silvestre de nossa fauna. Este animal foi fixado em solução de formol a 10%. Feita incisão de pele, os músculos da coluna vertebral foram retirados, os arcos vertebrais foram seccionados para visualização da medula espinhal e seus envoltórios. O cone medular neste animal iniciou-se na sexta vértebra lombar (L6) e terminou na segunda vértebra sacral (S2), com comprimento total de 50mm. O comprimento corporal deste felino foi de 473mm. Conclui-se que o melhor local para a anestesia epidural do membro pélvico no gato mourisco está entre as vértebras L6 e S2. Topographycal study on the medullar cone in jaguarundi, Herpailurus yagouaroundi (Severtzow,1858)(FELIDAE Abstract Since the caudal anesthesia was first proposed in 1926 many techniques were developed to anesthethize the lumbar and sacral nerves. Such methods for epidural anesthesia require knowledge of the relative anatomical regions. The objetive of the present study was to determine the topographic anatomy of the jaguarundi medullar cone as a morphological basis for application of anesthesis techniques. One adult female jaguarondi that perished by natural death has been obtained form the Sabiá Zoo Park, Uberlândia, MG, Brazil and conducted to tha Wild Animals Laboratory. The animal was fixes in 10% formalin solution. Following skin incision, muscles of the vertebral column were removed and the vertebral arcs sectioned for the visualization of hte spinal cord and its wrappers. Epidural anesthesic drug in the medullar cone. The medullar cone in this jaguarundi startet in the sixth lumbar vertebra (L6) and ended in the second sacral vertebra (S2); the spinal cord length was 50mm. The corporal length of this feline measured 473mm. The best region to perform the pelvic anesthesia in a jaguarundi is between the vertebra L6 and S2

The torsion cosmology in Kaluza-Klein theory

We have studied the torsion cosmology model in Kaluza-Klein theory. We considered two simple models in which the torsion vectors are $A_{\mu}=(\alpha,0,0,0)$ and $A_{\mu}=a(t)^2(0,\beta,\beta,\beta)$, respectively. For the first model, the accelerating expansion of the Universe can be not explained without dark energy which is similar to that in the standard cosmology. But for the second model, we find that without dark energy the effect of torsion can give rise to the accelerating expansion of the universe and the alleviation of the well-known age problem of the three old objects for appropriated value of the model parameter $\beta$. These outstanding features of the second torsion cosmology model have been supported by the Type Ia supernovae (SNIa) data.Comment: 12 pages, 2 figures. Accepted for publication in JCA

Scaling in Small-World Resistor Networks

We study the effective resistance of small-world resistor networks. Utilizing recent analytic results for the propagator of the Edwards-Wilkinson process on small-world networks, we obtain the asymptotic behavior of the disorder-averaged two-point resistance in the large system-size limit. We find that the small-world structure suppresses large network resistances: both the average resistance and its standard deviation approaches a finite value in the large system-size limit for any non-zero density of random links. We also consider a scenario where the link conductance decays as a power of the length of the random links, $l^{-\alpha}$. In this case we find that the average effective system resistance diverges for any non-zero value of $\alpha$.Comment: 15 pages, 6 figure