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Search Results: 1 - 10 of 11201 matches for " replication index. "
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In Vitro Genotoxic Effects of Four Helichrysum Species in Human Lymphocytes Cultures
Erolu,Erhan H; Hamzaolu,Ergin; Aksoy,Ahmet; Budak,ümit; ?zkul,Yusuf;
Biological Research , 2010, DOI: 10.4067/S0716-97602010000200005
Abstract: helichrysum sanguineum, helichrysum pamphylicum, helichrysum orientale, helichrysum noeanum (asteraceae) are medicinal plants. for centuries, they have been used as tea in turkey because of their medicinal properties. so far no scientifc evidence has been found in a literature survey regarding the genotoxic effects of these plants. this work evaluated the genotoxic effects on human lymphocyte cultures induced by methanol extracts of these plants, assayed in different concentrations (0.01, 0.05, 0.1, 0.5 and 1 mg/ml). according to the results, helichrysum noeanum, helichrysum pamphylicum and helichrysum sanguineum induced the formation of micronuclei and decreased the mitotic and replication indexes. helichrysum orientale did not affect these parameters, whereas helichrysum noeanum, helichrysum pamphylicum and helichrysum sanguineum were clearly genotoxic. they should therefore not be used freely in alternative medicine, although their antiproliferative activity may suggest antimitotic and anticarcinogenic properties. helichrysum orientale could be used in alternative medicine.
The cytogenetic effects of black tea and green tea on cultured human lymphocytes
Ero?lu, Halil Erhan;
Brazilian Archives of Biology and Technology , 2011, DOI: 10.1590/S1516-89132011000600011
Abstract: in this study, the cytogenetic effects of black tea and green tea were determined in cultured peripheral blood lymphocytes. results showed that black tea and green tea induced the mitotic and replication indexes and decreased micronuclei. but these data were not statistically significant for green tea. the effects of black tea on the micronucleus formation and mitotic index were statistically significant. the decrease in micronucleus counts indicated that black tea and green tea had considerable anticlastogenic and antigenotoxic effects as observed in vitro in human lymphocytes. thus, it could be concluded that tea polyphenols protected the normal cells from genotoxic or carcinogenic agents, which indicated the therapeutic and antioxidative role of catechins, flavonoids or other tea compounds.
In Vitro Genotoxic Effects of Four Helichrysum Species in Human Lymphocytes Cultures
Erhan H Erolu,Ergin Hamzaolu,Ahmet Aksoy,ümit Budak
Biological Research , 2010,
Abstract: Helichrysum sanguineum, Helichrysum pamphylicum, Helichrysum orientale, Helichrysum noeanum (Asteraceae) are medicinal plants. For centuries, they have been used as tea in Turkey because of their medicinal properties. So far no scientifc evidence has been found in a literature survey regarding the genotoxic effects of these plants. This work evaluated the genotoxic effects on human lymphocyte cultures induced by methanol extracts of these plants, assayed in different concentrations (0.01, 0.05, 0.1, 0.5 and 1 mg/mL). According to the results, Helichrysum noeanum, Helichrysum pamphylicum and Helichrysum sanguineum induced the formation of micronuclei and decreased the mitotic and replication indexes. Helichrysum orientale did not affect these parameters, whereas Helichrysum noeanum, Helichrysum pamphylicum and Helichrysum sanguineum were clearly genotoxic. They should therefore not be used freely in alternative medicine, although their antiproliferative activity may suggest antimitotic and anticarcinogenic properties. Helichrysum orientale could be used in alternative medicine.
The weighted quadratic index of biodiversity for pairs of species: a generalization of Rao’s index  [PDF]
Radu Cornel Guiasu, Silviu Guiasu
Natural Science (NS) , 2011, DOI: 10.4236/ns.2011.39104
Abstract: The distribution of biodiversity at multiple sites of a region has been traditionally investigated through the additive partitioning of the regional biodiversity, called γ-diversity, into the average within-site biodiversity or α-diversity, and the biodiversity among sites, or β-diversity. The standard additive partitioning of diversity requires the use of a measure of diversity which is a concave function of the relative abundance of species, like the Shannon entropy or the Gini- Simpson index, for instance. When a phylogenetic distance between species is also taken into account, Rao’s quadratic index has been used as a measure of dissimilarity. Rao’s index, however, is not a concave function of the distribution of relative abundance of either individual species or pairs of species and, consequently, only some nonstandard additive partitionings of diversity have been given using this index. The objective of this paper is to show that the weighted quadratic index of biodiversity, a generalization of the weighted Gini-Simpson index to the pairs of species, is a concave function of the joint distribution of the relative abundance of pairs of species and, therefore, may be used in the standard additive partitioning of diversity instead of Rao’s index. The replication property of this new measure is also discussed.
Análise de métodos de replica??o: o caso IBOVESPA
Hua Sheng, Hsia;Saito, Richard;
Revista de Administra??o de Empresas , 2002, DOI: 10.1590/S0034-75902002000200006
Abstract: this article presents and implements the main numerical methods used to replicate the bovespa index. the implemented models were full replication, minimum global variance portfolio, black model and square minimization with short selling. the results were verified under the parameters of tracking error, beta, r2 and serial similarity of average and variance. it was concluded that there is not the only way to achieve the best result, because all methods present strengths and weakness on the different contexts tested. in addition, managers may have different necessities on the time.
Some Models of Reproducing Graphs: III Game Based Reproduction  [PDF]
Richard Southwell, Chris Cannings
Applied Mathematics (AM) , 2010, DOI: 10.4236/am.2010.15044
Abstract: Many real world networks change over time. This may arise due to individuals joining or leaving the network or due to links forming or being broken. These events may arise because of interactions between the vertices which occasion payoffs which subsequently determine the fate of the vertices, due to ageing or crowding, or perhaps due to isolation. Such phenomena result in a dynamical system which may lead to complex behaviours, to selfreplication, to chaotic or regular patterns, or to emergent phenomena from local interactions. They hopefully give insight to the nature of the real-world phenomena which the network, and its dynamics, may approximate. To a large extent the models considered here are motivated by biological and social phenomena, where the vertices may be genes, proteins, genomes or organisms, and the links interactions of various kinds. In this, the third paper of a series, we consider the vertices to be players of some game. Offspring inherit their parent’s strategies and vertices which behave poorly in games with their neighbours get destroyed. The process is analogous to the way different kinds of animals reproduce whilst unfit animals die. Some game based systems are analytically tractable, others are highly complex-causing small initial structures to grow and break into large collections of self replicating structures.
Oracle Multimaster Replication Maintance Optimization
Hakik Paci,Aleksander Xhuvani
Academicus : International Scientific Journal , 2011, DOI: 10.7336/academicus.2011.03.10
Abstract: Some of the most promising post-Cold War developments in Marxian thought have been stimulated by problems facing Marxists in Western Europe, to that extent they all seem to lay bare, intentionally or otherwise, the lacking of qualities, of Marx’s prediction. The most significant example of the failure of Marxist theory to be realised in practice is the persistent survival of the capitalist mode of production. The inevitable crisis foreseen by Marx, which would lead to revolution, failed to materialise and that claim is now itself historical, since capitalism has become the norm for social organisation in most of the world’s nations. By asking the question how capitalism can persist amid crisis, Gramsci, provided the most promising way of revision to the stunted Marxian orthodoxy. Today for us is important to ask whether Marxist analysis of neoliberal global strategy or globalisation and fragmentation invite reconsideration of the tendency on the part of many international relations scholarships to ignore and simply dismiss Marxism. It is also important to consider whether the significance of Marxist project of developing a critical approach to international politics, is but one way in which Marxism progressed beyond the traditional Anglo-American scholarship to IR.
THE IMPACT OF KNOWLEDGE-BASED CONFIGURATIONS ON CRYPTOANALYSIS
A.L.Narasimha Rao,A. Kakoli Rao
Indian Journal of Computer Science and Engineering , 2011,
Abstract: Unified semantic archetypes have led to many practical advances, including symmetric encryption and widearea networks. In this work, we argue the development of replication, which embodies the extensive principles of e-voting technology. Our focus in this position paper is not on whether sensor networks and Scheme can connect to answer this quandary, but rather on exploring an analysis of link-level acknowledgements (SOAL).
Database Replication
Marius Cristian MAZILU
Database Systems Journal , 2010,
Abstract: For someone who has worked in an environment in which the same database is used for data entry and reporting, or perhaps managed a single database server that was utilized by too many users, the advantages brought by data replication are clear. The main purpose of this paper is to emphasize those advantages as well as presenting the different types of Database Replication and the cases in which their use is recommended.
Optimization of Dynamic Portfolio Insurance Model  [PDF]
Yuan Yao
Journal of Mathematical Finance (JMF) , 2012, DOI: 10.4236/jmf.2012.22019
Abstract: This paper establishes a dynamic portfolio insurance model under the condition of continuous time, based on Meton's optimal investment-consumption model, which combined the method of replicating dynamic synthetic put option using risk-free and risk assets. And it transfers the problem of investor's individual intertemporal dynamic portfolio insurance decision into a problem of static utility maximization under condition of continuous time, and give the optimal capital combination strategies corresponding to the optimal wealth level of the portfolio insurers, and compares the difference of strategies between this model and Merton model. The conclusions show that investors' optimal strategies of portfolio insurance are not dependent on their wealth, but market risk. That is to say, the higher the risk is, the more the demand of portfolio insurance is.
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