Strongly magnetized iron white dwarfs and the total lepton number violation

The influence of a neutrinoless electron to positron conversion on a cooling of strongly magnetized iron white dwarfs is studied.Comment: 4 pages, contribution to the conference MEDEX'13, Prague, June 11-14, 201

Pengaruh Metode Bercerita terhadap Kemampuan Menyimak pada Anak Usia Dini

Penelitian ini bertujuan untuk mengetahui pengaruh metode bercerita terhadap kemampuan menyimak pada anak usia 5-6 tahun di TK Mutiara Kampung Godang. Tujuan dari penelitian ini adalah untuk menguji hipotesis metode bercerita terhadap kemampuan menyimak anak. Metode penelitian ini adalah pre-eksperimental design dengan jenis One-Group Pre-test Post-test Design. Sampel penelitian ini  adalah 15 anak (7 anak laki-laki dan 8 anak perempuan). Teknik pengumpulan data yang digunakan adalah observasi dan dokumentasi. Teknik analisa data menggunakan statistik dengan uji t-test dengan program SPPS 16.0. Pengujian hipotesis dilakukan dengan menggunakan uji-t dengan teknik Independent T-test, diperoleh thitung sebesar 0,000 pada taraf signifikansi  < 0.050. Dengan demikian H0  ditolak dan Ha diterima karena 0.000 < 0.05. Hal ini membuktikan bahwa metode bercerita berpengaruh terhadap kemampuan menyimak anak

CHANGING THE RISK PARADIGMS CAN BE GOOD FOR OUR HEALTH: J-SHAPED, LINEAR AND THRESHOLD DOSE-RESPONSE MODELS

Both the linear (at low doses)-no-threshold (LNT) and the threshold models (S- shapes) dose-response lead to no benefit from low exposure. We propose three new models that allow and include, but do not require – unlike LNT and S-shaped models — this strong assumption. We also provide the means to calculate benefits associated with bi-phasic biological behaviors, when they occur and propose: 1. Three hormetic (phasic) models: the J-shaped, inverse J-shaped, the min-max, and 2. Method for calculating the direct benefits associated with the J and inverse J- shaped models. The J-shaped and min-max models for mutagens and carcinogenic agents include an experimentally justified repair stage for toxic and carcinogenic damage. We link these to stochastic transition models for cancer and show how abrupt transitions in cancer hazard rates, as functions of exposure concentrations and durations, can emerge naturally in large cell populations even when the rates of cell-level events increase smoothly (e.g., proportionally) with concentration. In this very general family of models, J-shaped dose- response curves emerge. These results are universal, i.e., independent of specific biological details represented by the stochastic transition networks. Thus, using them suggests a more complete and realistic way to assess risks at low doses or dose-rates

Clinical study of acquired immunodeficiency syndrome in domestic cats in São Paulo

In order to study the magnitude of distribution of feline leukemia virus (FLV) and feline immunodeficiency virus (FIV) among domestic cats in São Paulo, 401 animals from both sexes, different ages and breeds, were tested for antibodies (FIV) and viral soluble antigens (FLV) by means of ELISA (feline leukemia virus antigen / feline immunodeficiency virus antibody - CITE ® - Agrytech Sistems Inc.). Among these animals, 123 were healthy cats and 278 were patients at the Department of Medical Clinics / Veterinary Hospital of Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo due to various diseases eight (6,5%) FIV positive cats and two (1,6%) FLV positive cats were found among healthy animals in opposition to 39 (14%) and 30 (10,8%) sick cats regents to FIV and FLV antigens and antibodies, respectively. All animals but one presented single infection. FIV infection was four times more frequent among males when compared to females; nevertheless, no difference was found related to FVL infection. Opportunistic infections as those caused by Hemobartonella felis were the most common baseline disease found among FIV or FLV infected cats. When tumors, were considered the mediastinal lymphoma was the most frequent type found among FVL infected cats. A variety of other diseases was observed, associated to both retroviruses infection. The mean age of FIV infect animals was 4,4 + 3,0 years old and 2,4 ± 1,7 years old FLV infected cats. All infected, symptomatic animals died during the two years of  observation, while all healthy, infected cats survived, allowing the conclusion that period of latency post-infection may be long.Com a finalidade de estudar a magnitude da ocorrência do vírus da leucemia felina (VLF) e do vírus da imunodeficiência dos felinos (VIF) entre os felinos domésticos de São Paulo, 401 animais de ambos os sexos, idade e raças variadas, foram submetidos à pesquisa de anticorpos humorais (VIF) e de antígenos virais solúveis (VLF) através do teste imunoenzimático - ELISA (Feline Leukímia Virus Antígen / Feline Immunodeficiency Virus Antibory - CITE® - Agritech Systems Inc.). Desses, 123 eram felinos sadios e os demais 278 animais eram felinos doentes atendidos no Departamento de Clínica Médica/Hospital Veterinário da FMVZ/USP. Foram observados 8 (6,5%) reagentes ao VIF entre os felinos sadios e 39 (14%) entre os gatos doentes. Em relação ao VLF, 2 (1,6%) dos animais sadios e 30 (10,8%) entre os gatos doentes foram reagentes ao teste imunoenzimático e apenas um animal foi reagente a ambos os vírus. A infecção pelo VIF foi mais freqüente entre os machos, quando comparada às fêmeas, na proporção de 4:1, não tendo sido, no entretanto, observada diferença entre machos e fêmeas infectados em relação ao VLF. As infecções oportunistas, como a causada por Haemobartonella felis, foram as doenças associadas mais freqüentemente observadas tanto nos felinos VLF positivos quanto nos VIF positivos. Em relação aos tumores, a forma mediastinal do linfoma foi a mais freqüente entre os felinos VLF positivos. As demais condições mórbidas que se associaram à infecção pelos dois Retrovirus foram de natureza e freqüência variáveis. A idade média dos animais infectados pelo VIF foi de 4,4 + 3,0 anos e dos felinos infectados pelo VLF, de 2,4 + 1,7 anos. Todos os animais reagentes e sintomáticos não sobreviveram mais do que dois anos. Por outro lado, não houve nenhum óbito entre os animais assintomáticos infectados por qualquer um dos Retrovirus durante o mesmo período de observação, demonstrando que operíodo de pré-patência pós-infecção pode ser bastante longo

Pengaruh Metode Bercerita terhadap Kemampuan Menyimak pada Anak Usia Dini

Penelitian ini bertujuan untuk mengetahui pengaruh metode bercerita terhadap kemampuan menyimak pada anak usia 5-6 tahun di TK Mutiara Kampung Godang. Tujuan dari penelitian ini adalah untuk menguji hipotesis metode bercerita terhadap kemampuan menyimak anak. Metode penelitian ini adalah pre-eksperimental design dengan jenis One-Group Pre-test Post-test Design. Sampel penelitian ini  adalah 15 anak (7 anak laki-laki dan 8 anak perempuan). Teknik pengumpulan data yang digunakan adalah observasi dan dokumentasi. Teknik analisa data menggunakan statistik dengan uji t-test dengan program SPPS 16.0. Pengujian hipotesis dilakukan dengan menggunakan uji-t dengan teknik Independent T-test, diperoleh thitung sebesar 0,000 pada taraf signifikansi  < 0.050. Dengan demikian H0  ditolak dan Ha diterima karena 0.000 < 0.05. Hal ini membuktikan bahwa metode bercerita berpengaruh terhadap kemampuan menyimak anak

Evidências neuroquímicas e comportamentais do efeito ansiogênico da deltametrina em ratos

Pyrethroid insecticides are extensively used for pest control around the house, flea prevention for pets, and plant sprays for the home and in agriculture. Deltamethrin (DTM) is a Type II pyrethroid insecticide used to control a variety of insects in agriculture and domestic environments. The present study investigated the possible anxiogenic effects of DTM (1, 3, and 10 mg/kg) in rats using behavioral and neurochemical methods. We assessed general locomotor activity and behavior in the elevated plus maze and open field test. Striatal and hippocampal neurotransmitter and metabolite levels were also measured. DTM (i) reduced locomotion and rearing frequency, (ii) slightly increased the duration of immobility, (iii) reduced the time engaged in social interaction, (iv) reduced the percentage of entries into and time spent on the open arms of the elevated plus maze, (v) reduced the number of center crossings in the elevated plus maze, (vi) Striatal and hippocampal neurotransmitter and metabolite levels were also measured. DTM (i) reduced locomotion and rearing frequency, (ii) slightly increased the duration of immobility, (iii) reduced the time engaged in social interaction, (iv) reduced the percentage of entries into and time spent on the open arms of the elevated plus maze, (v) reduced the number of center crossings in the elevated plus maze, (vi) increased striatal serotonin neurotransmitter and its metabolite, and (vii) did not alter motor coordination on the rotarod, grooming duration in the open field test, rectal temperature, or hippocampal neurotransmitter levels. These data suggest that DTM at the present doses and under these experimental conditions presented a similar profile to that of anxiogenic drugs, unrelated with the increased serotonin neurotransmission.Inseticidas piretróides são amplamente utilizados para controle de pragas, como na prevenção de pulgas em animais de estimação e sprays de plantas para a casa e na agricultura. Deltametrina (DTM) é um inseticida piretróide tipo II usado para controlar uma variedade de insetos na agricultura e ambientes domésticos. O presente estudo investigou os possíveis efeitos ansiogênicos de DTM (1, 3 e 10 mg/kg) em ratos, utilizando métodos comportamentais e neuroquímicos. Foi avaliada a atividade locomotora geral e comportamento no labirinto em cruz elevado e teste de campo aberto. Os níveis de neurotransmissores e metabólitos no estriado e hipocampo também foram mensurados. DTM (i) reduziu a locomoção e a frequência de levantar, (ii) aumentou da duração da imobilidade, (iii) reduziu o tempo de interação social, (iv) reduziu a percentagem de entradas e tempo gasto nos braços abertos do elevado labirinto em cruz, (v) reduziu o número de cruzamentos no centro do labirinto em cruz elevado, (vi) aumentou neurotransmissor serotonina e de seu metabólito estriatal, e (vii) não alterou a coordenação motora no rotarod, duração do grooming no teste de campo aberto, temperatura retal, ou níveis de neurotransmissores do hipocampo. Estes dados sugerem que DTM nas presentes doses e sob estas condições experimentais apresentaram um perfil semelhante ao de drogas ansiogénicas, não relacionados ao aumento da serotonina estriatal

Identificação de cepas de Escherichia coli enteropatogênicas em amostras de fezes, por reação de imunofluorescência direta

A study of 121 patients with acute diarrhea was made at the Pediatric Clinic of the Santa Casa de S. Paulo (the S. Paulo Charity Hospital). Etiological diagnosis of 121 cases was carried out through the classical bacteriological method and direct fluorescent antibody tests for the identification of E. coli. The antibiotic sensitivity of these bacteria to different antimicrobials was determined by the Minimum Inhibitory Concentration (MIC) method. Fifty-six positive cases were found; 89.3% of which corresponded to different serotypes of enter o pathogenic E. coli (89.3%), when the direct fluorescent antibody test was used. The classic bacteriological method bared four Salmonella strains and two Shigella. The MIC showed the E. coli to be more sensitive to Gentamicin and Amikacin than to other antibiotics.Foi realizado diagnóstico etiológico de casos de diarréia aguda em 121 pacientes internados na Clínica Pediátrica do Hospital da Santa Casa de São Paulo, Brasil. Foram utilizados os métodos bacteriológico clássico e de reação de imunofluorescência direta para a identificação de cepas de Escherichia coli enteropatogênicas: para estudo da sensibilidade das cepas de Escherichia coli isoladas, a diferentes antibióticos, foi usado o método de Concentração Inibitória Minima (CIM). Dos 56 casos positivos, 89,3% correspondiam a diferentes sorotipos enteropatogênicos de Escherichia coli, quando utilizada a técnica de imunofluorescência direta. O método bacteriológico clássico revelou ainda, nos 121 casos examinados, 4 cepas de Salmonella e 2 de Shigella. No estudo da CIM verificou-se maior sensibilidade das cepas de Escherichia coli enteropatogênicas estudadas à Gentamicina e Amikacina, do que aos outros antibióticos

Instanton Calculations for N=1/ 2 super Yang-Mills Theory

We study (anti-) instantons in super Yang-Mills theories defined on a non anticommutative superspace. The instanton solution that we consider is the same as in ordinary SU(2) N=1 super Yang-Mills, but the anti-instanton receives corrections to the U(1) part of the connection which depend quadratically on fermionic coordinates, and linearly on the deformation parameter C. By substituting the exact solution into the classical Lagrangian the topological charge density receives a new contribution which is quadratic in C and quartic in the fermionic zero-modes. The topological charge turns out to be zero. We perform an expansion around the exact classical solution in presence of a fermionic background and calculate the full superdeterminant contributing to the one-loop partition function. We find that the one-loop partition function is not modified with respect to the usual N=1 super Yang-Mills.Comment: 27 pages, harmvac, Redone the computation of topological charge, a section has been rewritten and references adde

Screening of Nuclear Reactions in the Sun and Solar Neutrinos

We quantitatively determine the effect and the uncertainty on solar neutrino production arising from the screening process. We present predictions for the solar neutrino fluxes and signals obtained with different screening models available in the literature and by using our stellar evolution code. We explain these numerical results in terms of simple laws relating the screening factors with the neutrino fluxes. Futhermore we explore a wider range of models for screening, obtained from the Mitler model by introducing and varying two phenomenological parameters, taking into account effects not included in the Mitler prescription. Screening implies, with respect to a no-screening case, a central temperat reduction of 0.5%, a 2% (8%) increase of Beryllium (Boron)-neutrino flux and a 2% (12%) increase of the Gallium (Chlorine) signal. We also find that uncertainties due to the screening effect ar at the level of 1% for the predicted Beryllium-neutrino flux and Gallium signal, not exceeding 3% for the Boron-neutrino flux and the Chlorine signal.Comment: postscript file 11 pages + 4 figures compressed and uuencoded we have replaced the previous paper with a uuencoded file (the text is the same) for any problem please write to [email protected]