Real and complex integral closure, Lipschitz equisingularity and applications on square matrices

Recently the authors investigated the Lipschitz triviality of simple germs of matrices. In this work, we improve some previous results and we present an extension of an integral closure result for the real setting. These tools are applied to investigate classes of square matrices singularities classified by Bruce and Tari

Eficiência agronômica do inoculante de cana-de-açúcar aplicado em três ensaios conduzidos no Estado do Rio de Janeiro durante o primeiro ano de cultivo.

A inoculação de cana-de-açúcar utilizando bactérias diazotróficas selecionadas pode reduzir a demanda de nitrogênio fertilizante na cultura. O objetivo deste trabalho foi testar o inoculante contendo uma mistura de cinco espécies de bactérias diazotróficas em duas variedades de cana-de-açúcar, RB72454 e RB867515, plantadas em três locais sendo duas usinas produtoras de açúcar do Estado Rio de Janeiro e o terceiro no Campo Experimental da Embrapa Agrobiologia. No primeiro ano de plantio no campo, apenas a variedade RB867515 respondeu a inoculação utilizando a mistura de estirpes.bitstream/item/42983/1/BOP-45.pd

Budismo e Poder Político na Tailândia contemporânea: da construção histórica à influência do Catolicismo

O presente ensaio visa explorar a relação entre Budismo e poder político na Tailândia, assim como a influência do catolicismo neste relacionamento. A pesquisa exploratória triangulou dados provenientes de pesquisa de campo, entrevistas com especialistas e pesquisa bibliográfica. Entende-se aqui que o Budismo Theravada, também conhecido como “Budismo dos Anciãos”, principal religião presente na Tailândia, teve um papel significativo no desenvolvimento das ideias políticas e das instituições governamentais tailandesas. Desde 1932 a monarquia constitucional tailandesa foi fundamental para a manutenção da continuidade política da nação. Religião e política tiveram, amiúde, um relacionamento de interdependência: por um lado o Budismo se caracterizou como fonte de legitimação ao poder temporal e por outro o poder político se responsabilizou em apoiar e desenvolver a religião. Essa relação, mesmo sofrendo alterações ao longo dos anos e tendo influência de outras denominações como o Catolicismo, continua até hoje e se constitui assim um caso a ser estudado, como exemplo da presença da Religião e do continuo de sua interação com os sistemas políticos vigentes

Dynamical Vacuum in Quantum Cosmology

By regarding the vacuum as a perfect fluid with equation of state p=-rho, de Sitter's cosmological model is quantized. Our treatment differs from previous ones in that it endows the vacuum with dynamical degrees of freedom. Instead of being postulated from the start, the cosmological constant arises from the degrees of freedom of the vacuum regarded as a dynamical entity, and a time variable can be naturally introduced. Taking the scale factor as the sole degree of freedom of the gravitational field, stationary and wave-packet solutions to the Wheeler-DeWitt equation are found. It turns out that states of the Universe with a definite value of the cosmological constant do not exist. For the wave packets investigated, quantum effects are noticeable only for small values of the scale factor, a classical regime being attained at asymptotically large times.Comment: Latex, 19 pages, to appear in Gen. Rel. Gra

Low intensity laser therapy accelerates muscle regeneration in aged rats

Background: Elderly people suffer from skeletal muscle disorders that undermine their daily activity and quality of life; some of these problems can be listed as but not limited to: sarcopenia, changes in central and peripheral nervous system, blood hypoperfusion, regenerative changes contributing to atrophy, and muscle weakness. Determination, proliferation and differentiation of satellite cells in the regenerative process are regulated by specific transcription factors, known as myogenic regulatory factors (MRFs). In the elderly, the activation of MRFs is inefficient which hampers the regenerative process. Recent studies found that low intensity laser therapy (LILT) has a stimulatory effect in the muscle regeneration process. However, the effects of this therapy when associated with aging are still unknown. Objective: This study aimed to evaluate the effects of LILT (λ=830 nm) on the tibialis anterior (TA) muscle of aged rats. Subjects and methods: The total of 56 male Wistar rats formed two population sets: old and young, with 28 animals in each set. Each of these sets were randomly divided into four groups of young rats (3 months of age) with n=7 per group and four groups of aged rats (10 months of age) with n=7 per group. These groups were submitted to cryoinjury + laser irradiation, cryoinjury only, laser irradiation only and the control group (no cryoinjury/no laser irradiation). The laser treatment was performed for 5 consecutive days. The first laser application was done 24 h after the injury (on day 2) and on the seventh day, the TA muscle was dissected and removed under anesthesia. After this the animals were euthanized. Histological analyses with toluidine blue as well as hematoxylin-eosin staining (for counting the blood capillaries) were performed for the lesion areas. In addition, MyoD and VEGF mRNA was assessed by quantitative polymerase chain reaction. Results: The results showed significant elevation (p<0.05) in MyoD and VEGF genes expression levels. Moreover, capillary blood count was more prominent in elderly rats in laser irradiated groups when compared to young animals. Conclusion: In conclusion, LILT increased the maturation of satellite cells into myoblasts and myotubes, enhancing the regenerative process of aged rats irradiated with laser.National Institutes of Health (U.S.) (grant RO1AI050875

Low-level laser therapy (LLLT) combined with swimming training improved the lipid profile in rats fed with high-fat diet

Obesity and associated dyslipidemia is the fastest growing health problem throughout the world. The combination of exercise and low-level laser therapy (LLLT) could be a new approach to the treatment of obesity and associated disease. In this work, the effects of LLLT associated with exercises on the lipid metabolism in regular and high-fat diet rats were verified. We used 64 rats divided in eight groups with eight rats each, designed: SC, sedentary chow diet; SCL, sedentary chow diet laser, TC, trained chow diet; TCL, trained chow diet laser; SH, sedentary high-fat diet; SHL, sedentary high-fat diet laser; TH, trained high-fat diet; and THL, trained high-fat diet laser. The exercise used was swimming during 8 weeks/90 min daily and LLLT (GA-Al-As, 830 nm) dose of 4.7 J/point and total energy 9.4 J per animal, applied to both gastrocnemius muscles after exercise. We analyzed biochemical parameters, percentage of fat, hepatic and muscular glycogen and relative mass of tissue, and weight percentage gain. The statistical test used was ANOVA, with post hoc Tukey–Kramer for multiple analysis between groups, and the significant level was p < 0.001, p < 0.01, and p < 0.05. LLLT decreased the total cholesterol (p < 0.05), triglycerides (p < 0.01), low-density lipoprotein cholesterol (p < 0.05), and relative mass of fat tissue (p < 0.05), suggesting increased metabolic activity and altered lipid pathways. The combination of exercise and LLLT increased the benefits of exercise alone. However, LLLT without exercise tended to increase body weight and fat content. LLLT may be a valuable addition to a regimen of diet and exercise for weight reduction and dyslipidemic control