Graviton emission from a higher-dimensional black hole

We discuss the graviton absorption probability (greybody factor) and the cross-section of a higher-dimensional Schwarzschild black hole (BH). We are motivated by the suggestion that a great many BHs may be produced at the LHC and bearing this fact in mind, for simplicity, we shall investigate the intermediate energy regime for a static Schwarzschild BH. That is, for $(2M)^{1/(n-1)}\omega\sim 1$, where $M$ is the mass of the black hole and $\omega$ is the energy of the emitted gravitons in $(2+n)$-dimensions. To find easily tractable solutions we work in the limit $l \gg 1$, where $l$ is the angular momentum quantum number of the graviton.Comment: 10 pages, 8 figures, references added, typos corrected. Graviton degeneracy factor included; main results remain unchange

Operation of a perfusive catalytic membrane with nonlinear kinetics

Operation of a perfusive catalytic curved membrane is systematized into different transport-reaction regimes. The internal viscous permeation improves the catalyst performance, measured here by the effectiveness factor and by its enhancement relative to purely diffusive conditions. A theoretical analysis is presented for nonlinear kinetic expressions, which are suitable to describe the consumption of a reactant in many (bio)catalytic systems. The kinetic and transport parameters required to attain maximum enhancement are related by simple design rules, which depend on the form of the reaction rate law (namely on the order of reaction and dimensionless inhibition constant). For zero-order reactions, these optimum conditions correspond to attaining negligible concentration at a position inside the membrane, while may be interpreted in general as separating situations of severe mass transfer resistance from cases of high effectiveness. It is important to incorporate the correct form of the kinetic expression in the analysis, so that the predictions can be used in a quantitative manner. The results for the different regimes are compiled in enhancement plots and in Peclet–Thiele diagrams. Moreover, the study also yielded new results for the nonlinear reaction–diffusion problem in a curved membrane with its two surfaces exposed to different concentrations, a case of relevance in membrane reactors

Gestão de infestantes de inverno e primavera em vinha e olival com um fertilizante ecológico com propriedades herbicidas

Weeds reduce crop yields and require annual measures of control, although they can provide important ecological benefits. In this work, the efficacy was tested of an ecological fertilizer with herbicidal properties (Bioscrop Herbitec®) which in high concentrations (10-15%) can have a similar effect to a contact herbicide. The composition of the product is 6.0 % of water-soluble potassium oxide, 54.7 % of organic acids and 39.3 % of dispersants and diluents. The product was tested in six field trials during two years, which included two vineyards and two olive orchards and winter and spring vegetation. In each experiment three treatments were imposed, being the product applied at the concentrations of 10% and 15% and a non-treated control. In treated plots, the entire ground surface (rows and inter-rows) was sprayed. The evaluation of the effect of the treatments on vegetation was assessed by the pin point and grid methods which consisted of determining the percentage of damaged and not damaged vegetation and bare soil. The production of dry biomass of weeds was also evaluated as a measure of the persistence of the damage on vegetation. The floristic composition of the stands was also recorded to evaluate the specific susceptibility of the weeds to the different treatments. The results showed that the product severely damaged the vegetation, and the effect persisted for more than a month. The application of the product caused a severe reduction in the aboveground biomass while keeping the soil protected, showing a useful compromise between the reduction in weed competition and the maintenance of ground cover. Some species were severely damaged while others seemed to have benefited in relative terms, suggesting that the effectiveness of the product will be dependent on the weed species present.As infestantes reduzem a produtividade das culturas e requerem medidas anuais de combate, embora também possam fornecer importantes serviços ecossistémicos. Neste trabalho foi testada a eficácia de um produto ecológico (Bioscrop Herbitec®) que, em altas concentrações (10- 15%), pode ter um efeito semelhante ao de um herbicida de contato. O produto contém 6,0 % de óxido de potássio solúvel em água, 54,7 % de ácidos orgânicos e 39,3 % de dispersantes e diluentes. O produto foi testado em seis ensaios de campo, em duas vinhas e dois olivais e sobre vegetação de inverno e de primavera. Em cada ensaio foram testados três tratamentos, correspondentes à aplicação do produto em duas concentrações (10 e 15%) e uma modalidade testemunha. Nos talhões tratados o produto foi aplicado nas linhas e entrelinhas. O efeito dos tratamentos na vegetação foi avaliado pelos métodos do ponto quadrado e da grelha, que consistiram em determinar o grau de cobertura do solo com vegetação danificada, não danificada e solo nu. A produção de matéria seca das infestantes foi também avaliada como medida da persistência do dano na vegetação. A composição florística dos cobertos foi também registada como forma de avaliar a suscetibilidade específica das infestantes aos diferentes tratamentos. Os resultados mostraram que o produto danificou severamente a vegetação e o efeito persistiu por mais de um mês. A aplicação do produto causou uma redução significativa da biomassa aérea, mas manteve o solo protegido, mostrando um equilíbrio interessante entre a redução da competição das infestantes e a proteção do solo. Algumas espécies foram fortemente danificadas, enquanto outras parecem ter beneficiado em termos relativos, sugerindo que a eficácia do produto dependerá das espécies infestantes presentesThe authors are grateful to the Foundation for Science and Technology (FCT, Portugal) and FEDER under Programme PT2020 for financial support to CIMO (UID/AGR/00690/2013). The results of the first year of studies of this work were extracted from the master's thesis in Agroecology of the first author (António Barreira)info:eu-repo/semantics/publishedVersio

QCD-supression by Black Hole Production at the LHC

Possible consequences of the production of small black holes at the LHC for different scenarios with large extra dimensions are investigated. The effects from black hole production on some standard jet observables are examined, concentrating on the reduction of the QCD cross section. It is found that black hole production of partons interacting on a short enough distance indeed seem to generate a drastic drop in the QCD cross section. However from an experimental point of view this will in most cases be camouflaged by energetic radiation from the black holes

Operational Observatory of the catalan sea (OOCS)

The Operational Observatory of the Catalan Sea (OOCS) recently created by the Operational Oceanography Group at CEAB-CSIC is presented. The OOCS aims at performing observations of the marine environment in the Catalan Sea and beyond, assessing, modelling and forecasting the hydrodynamic and biogeochemical processes of the region. Some of the biogeochemical variables available in the models and forecast are phytoplankton, zooplankton and nutrients. Although OOCS is expected to be fully operational in 2011, some of its services are already available to the public through a dedicated webpage http://www.ceab.csic.es/~simob/.Peer Reviewe

Gametic and somatic embryogenesis through in vitro anther culture of different Citrus genotypes

Abstract: In vitro tissue culture represents a useful technique for advancing Citrus breeding and propagation. Among in vitro regeneration systems, anther culture is commonly used to produce haploids and doubled haploids for a fast-track producing homozygous lines, in comparison with the traditional self-pollination approach, which involves several generations of selfing. In addition, anthers culture can produce somatic embryos that can also be used for clonal propagation. In this study, two thermal shocks were applied to the anthers of six Citrus genotypes (two clementine and four sweet oranges), just after they were put in culture. The response obtained was different depending on the genotype: both clementines, namely Hernandina and Corsica, produced homozygous and triploid regenerants (microspore-derived embryos), whereas all of the analyzed regenerants from sweet oranges, three cultivars of Tarocco and Moro, produced heterozygous and diploid regenerants similar to the parental genotypes (somatic embryos)

High correlation between Chagas' disease serology and PCR-based detection of Trypanosoma cruzi kinetoplast DNA in bolivian children living in an endemic area

Submitted by sandra infurna ([email protected]) on 2016-06-29T15:31:55Z No. of bitstreams: 1 carlos20_morel_etal_IOC_1994.pdf: 578671 bytes, checksum: 49c1bfe1a3334487aede673ca532654a (MD5)Approved for entry into archive by sandra infurna ([email protected]) on 2016-06-29T15:43:03Z (GMT) No. of bitstreams: 1 carlos20_morel_etal_IOC_1994.pdf: 578671 bytes, checksum: 49c1bfe1a3334487aede673ca532654a (MD5)Made available in DSpace on 2016-06-29T15:43:03Z (GMT). No. of bitstreams: 1 carlos20_morel_etal_IOC_1994.pdf: 578671 bytes, checksum: 49c1bfe1a3334487aede673ca532654a (MD5) Previous issue date: 1994Submitted by Angelo Silva ([email protected]) on 2016-07-07T11:16:53Z No. of bitstreams: 3 carlos20_morel_etal_IOC_1994.pdf.txt: 19093 bytes, checksum: d5ec7ae508e9468c358833ecf7cf1076 (MD5) carlos20_morel_etal_IOC_1994.pdf: 578671 bytes, checksum: 49c1bfe1a3334487aede673ca532654a (MD5) license.txt: 2991 bytes, checksum: 5a560609d32a3863062d77ff32785d58 (MD5)Approved for entry into archive by sandra infurna ([email protected]) on 2016-07-07T12:13:56Z (GMT) No. of bitstreams: 3 license.txt: 2991 bytes, checksum: 5a560609d32a3863062d77ff32785d58 (MD5) carlos20_morel_etal_IOC_1994.pdf: 578671 bytes, checksum: 49c1bfe1a3334487aede673ca532654a (MD5) carlos20_morel_etal_IOC_1994.pdf.txt: 19093 bytes, checksum: d5ec7ae508e9468c358833ecf7cf1076 (MD5)Made available in DSpace on 2016-07-07T12:13:56Z (GMT). No. of bitstreams: 3 license.txt: 2991 bytes, checksum: 5a560609d32a3863062d77ff32785d58 (MD5) carlos20_morel_etal_IOC_1994.pdf: 578671 bytes, checksum: 49c1bfe1a3334487aede673ca532654a (MD5) carlos20_morel_etal_IOC_1994.pdf.txt: 19093 bytes, checksum: d5ec7ae508e9468c358833ecf7cf1076 (MD5) Previous issue date: 1994Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Bioquímica e Biologia Molecular. Laboratório de Biologia Molecular e Doenças Endêmicas. Rio de Janeiro, RJ, Brasil.UMR CNRS/ ORSTOM, Génétique Moléculaire des Parasites et des Vecteurs. CP 9214, La Paz, Bolivia.Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Bioquímica e Biologia Molecular. Laboratório de Biologia Molecular e Doenças Endêmicas. Rio de Janeiro, RJ, Brasil.Universidad Mayor de San Andres. Instituto Boliviano de Biologia de Altura. La Paz, Bolivia.Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Bioquímica e Biologia Molecular. Laboratório de Biologia Molecular e Doenças Endêmicas. Rio de Janeiro, RJ, Brasil.Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Bioquímica e Biologia Molecular. Laboratório de Biologia Molecular e Doenças Endêmicas. Rio de Janeiro, RJ, Brasil.UMR CNRS/ ORSTOM, Génétique Moléculaire des Parasites et des Vecteurs. CP 9214, La Paz, Bolivia.The detection of Tr)tpunosomu crirzi kinetoplast DNA by polymerase chain reaction (PCR) amplification is a potentially powerful tool for the parasitological diagnosis of Chagas’ disease. We have applied this technique in a field situation in Bolivia, where 45 children from a primary school were subjected to serological testing, buffy coat analysis and PCR diagnosis. 26 of the 28 serology-positive individuals were also positive by PCR. In addition, two serology-negative children gave a positive result by PCR, including one who was positive in the buffy coat test. These results suggest that PCR detection of T. cruzi DNA in blood can be a very useful complement to serology in Chagas’ disease diagnosis in Bolivia

Power transformers winding fault diagnosis by the on-load exciting current extended Park's vector approach

This paper presents the application of the on-load exciting current Extended Park's Vector Approach to diagnose incipient turn-to-turn winding faults in operating power transformers. Experimental and simulation test results demonstrate the effectiveness of the proposed technique, which is based on the spectral analysis of the AC component of the on-load exciting current Park's Vector modulus

Androgens and low density lipoprotein-cholesterol interplay in modulating prostate cancer cell fate and metabolism

Background: Androgens, the known drivers of prostate cancer (PCa), have been indicated as important metabolic regulators with a relevant role in stimulating lipid metabolism. Also, the relationship between obesity and the aggressiveness of PCa has been established. However, it is unknown if the androgenic hormonal environment may alter the response of PCa cells to lipid availability. Purpose: The present study evaluated the effect of 5 alpha-dihydrotestosterone (DHT) in regulating lipid metabolism, and the interplay between this hormone and low-density lipoprotein (LDL)-cholesterol in modulating PCa cells fate.Methods: Non-neoplastic and neoplastic PCa cells were treated with 10 nM DHT, and the expression of fatty acids transporter, fatty acid synthase (FASN), and carnitine palmitoyltransferase 1A (CPT1A) evaluated. PCa cells were also exposed to LDL (100 mu g/ml) in the presence or absence of DHT.Results: Treatment with DHT upregulated the expression of FASN and CPT1A in androgen-sensitive PCa cells. In contrast, LDL supplementation suppressed FASN expression regardless of the presence of DHT, whereas aug-menting CPT1A levels. Our results also showed that LDL-cholesterol increased PCa cells viability, proliferation, and migration dependently on the presence of DHT. Moreover, LDL and DHT synergistically enhanced the accumulation of lipid droplets in PCa cells.Conclusions: The obtained results show that androgens deregulate lipid metabolism and enhance the effects of LDL increasing PCa cells viability, proliferation and migration. The present findings support clinical data linking obesity with PCa and first implicate androgens in this relationship. Also, they sustain the application of phar-macological approaches targeting cholesterol availability and androgens signaling simultaneously.info:eu-repo/semantics/publishedVersio