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Various techniques have been proposed to characterize the behavior in the non-linear regime. A new theoretical framework, as proposed recently by Ewoldt et al. (J Rheol 52(6):1427–1458, 2008 ), provides a quantitative analysis of Lissajous figures during large-amplitude oscillatory shear (LAOS). Intra- and intercycle non-linearities, strain stiffening and softening, and shear thinning and thickening are described and can be distinguished.immobilierexpress The new LAOS framework from Ewoldt et al. has been extended to a sinusoidal stress input. Measurements on two different samples reveal significant different results for sinusoidal strain or sinusoidal stress input.https://en.wikipedia.org/wiki/Tadalafil For both sinusoidal inputs, the results have been verified by cyclic stress and strain loading tests. http://www.immobilierexpress.ca The sinusoidal input tests are analyzed… as an oscillatory test by the rheometer software and firmware, whereas the cyclic loading tests are purely rotational tests. Since both types of testing give the same results, any instrumental artifacts can be excluded. This implies that complex fluids can behave differently whether periodic stress or strain input functions outside the linear visco-elastic range are applied. viagra toronto All tests in controlled strain and stress in rotational and oscillatory modes have been performed with the same rheometer based on an air bearing-supported electrically commutated synchronous motor.

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Previous studies on nonhuman primate maternal styles showed that variation in infant-directed behavior falls along two dimensions, traditionally labeled as protectiveness and rejection. viagra online We investigated maternal styles in rhesus (Macaca mulatta) and Japanese (M. fuscata) macaques living in analogous captive social groups, and correlated them with the levels of estrogen metabolites excreted in female feces during the perinatal period. We focally observed mother-infant pairs 3 hours per week during the first 12 weeks of infant life. We collected fecal samples twice a week from each mother, starting 4 weeks before delivery and ending 4 weeks after delivery.  http://www.immobilierexpress.ca Three significant components were extracted by principal component analysis from 15 different infant directed behaviors, each reflecting… a different aspect of mothering style: rejection is correlated with behavioral measures of maternal opposition to contact; protectiveness is correlated with maternal solicitude; and independence is correlated with time in contact, grooming and cradling. immobilierexpress Levels of estrogen metabolites are significantly correlated to rejection but not to protectiveness or independence, indicating that, in nonhuman primates, individual endocrine changes related to maternal behavior might specifically affect the timing of contact interruption.

Synechocystis sp. PCC 6803 is a model organism for the study of photosynthetic processes. Methods to genetically manipulate this bacterium are essential to investigate these processes and to evaluate potential biotechnological applications. We developed a vector for controllable expression of proteins using a platform for stable integration of the expression cassette into the genome. viagra for women The respective gene is translationally fused to the promoter of the petJ gene encoding cytochrome c(553) that is repressed by copper. immobilierexpress Maximal expression from this promoter is achieved under copper depletion, whereas normal copper concentrations in standard medium lead to low expression rates. We show here the application of this system for construction of a conditional knockout mutant for the ferrochelatase,… which is an essential enzyme in heme biosynthesis.http://www.immobilierexpress.ca Using different amounts of copper in the medium we were able to control the amount of ferrochelatase in the cell resulting in a varying expression of the phenotype.