Search results for "NIP"
showing 10 items of 775 documents
Drought-induced positive feedback in xylophagous insects: Easier invasion of Scots pine leading to greater investment in immunity of emerging individ…
2012
Abstract We studied the infestation rate of Scots pine Pinus sylvestris by xylophagous insects in relation to distance from forest lakes in eastern Latvia, northern Europe. In summers of 2008 and 2009, we felled 72 pines of approximately 65 years age. Sections of the logs were incubated in insect emergence traps. The trees located near lakes were significantly less infested by xylophagous insects than those sampled at greater distances from the lakes. We also tested the ability of Tomicus piniperda , the most abundant species of xylophagous insects in our samples, to resist the entomopathogenic fungus Beauveria bassiana . The results show that beetles captured near lakes were more susceptib…
The Heisenberg dynamics of spin systems: A quasi*‐algebras approach
1996
The problem of the existence of the thermodynamical limit of the algebraic dynamics for a class of spin systems is considered in the framework of a generalized algebraic approach in terms of a special class of quasi*-algebras, called CQ*-algebras. Physical applications to (almost) mean-field models and to bubble models are discussed. © 1996 American Institute of Physics.
Wrong Hand, Wrong Children? The Education of Left-Handed Children in Soviet Latvia
2019
Left-handers have always been surrounded by stigma and controversy, and attitudes toward this group have always been rooted in the ideas and traditions of power relations existing in a given society. Thus, the goal of this study is to describe the retraining of left-handers as it was conducted in Soviet education. The impact of political power on an individual’s body-mind interaction is a significant problem in research on the creation of the “New Soviet Man.” The teaching of left-handed children in the Soviet Union is a noteworthy example of the totalitarian regime’s illusionary endeavors to change human nature. The Soviet education envisaged neither a special attitude nor any particular p…
Juveniilihormonin vaikutus munantuotantoon ja seksuaaliseen antagonismiin koloradonkuoriaisilla
2012
Hormonitoiminta on yksi eliöiden säätelyjärjestelmistä. Hyönteisillä keskeisessä osassa hormonisäätelyä ovat juveniilihormonit (JH). Niiden määrä yksilöiden elimistössä säätelee monia asioita yksilöiden kehityksestä lisääntymistoimintoihin. Juuri tehokas lisääntyminen onkin eliöiden tärkeimpiä tehtäviä. Hormonitoiminta pitää yllä evoluution myötä eri lajeille ja lajiryhmille kehittyneitä erilaisia lisääntymisstrategioita: jotkin lisääntyvät harvakseltaan mutta huolehtivat poikasistaan, toiset tuottavat paljon jälkeläisiä, jotka ne jättävät selviämään yksin. Sukupuolten välillä on kuitenkin eroja optimaalisessa lisääntymisstrategiassa. Naaraat joutuvat kuluttamaan jälkeläisten tuottamiseen k…
Evaluation of the sequestering ability of different complexones towards Ag+ ion
2014
Abstract The interaction between Ag+ cation and different ligands was evaluated as a function of temperature and ionic strength by means of potentiometric techniques. Six aminopolycarboxylic (APCs) and aminopolyphosphonic (APPs) ligands were chosen, namely four APCs: nitrilotriacetic acid (NTA), ethylene-glycol-bis(2-aminoethylether)-N,N,N’,N’-tetraacetic acid (EGTA), ethylenediamine-N,N,N’,N’-tetraacetate (EDTA) and diethylenetriamine-N,N,N’,N”,N”-pentaacetic acid (DTPA)] and two APPs: [(1-hydroxyethane-1,1-diyl)bis(phosphonic acid) (HEDP) and [[(Phosphonomethyl)imino]bis[2,1-ethanediylnitrilobis(methylene)]] tetrakis-phosphonic acid (DTPP). Different mononuclear species with general formu…
Formation of two-dimensional crystals of icosahedral RNA viruses.
2007
International audience; The formation of 2D arrays of three small icosahedral RNA viruses with known 3D structures (tomato bushy stunt virus, turnip yellow mosaic virus and bromegrass mosaic virus) has been investigated to determine the role of each component of a negative staining solution containing ammonium molybdate and polyethylene glycol. Virion association was monitored by dynamic light scattering (DLS) and virus array formation was visualised by conventional transmission electron microscopy and cryo-electron microscopy after negative staining. The structural properties of viral arrays prepared in vitro were compared to those of microcrystals found in the leaves of infected plants. A…
Differential influence of Pomphorhynchus laevis (Acanthocephala) on brain serotonergic activity in two congeneric host species.
2007
The physiological mechanisms by which parasites with complex life cycles manipulate the behaviour of their intermediate hosts are still poorly understood. In Burgundy, eastern France, the acanthocephalan parasitePomphorhynchus laevisinverses reaction to light in its amphipod hostGammarus pulex, but not inGammarus roeseli, a recent invasive species. Here, we show that this difference in manipulation actually reflects a difference in the ability of the parasite to alter brain serotonergic (5-HT) activity of the two host species. Injection of 5-HT in uninfected individuals of both host species was sufficient to inverse reaction to light. However, a difference in brain 5-HT immunocytochemical s…
Steiner systems and configurations of points
2020
AbstractThe aim of this paper is to make a connection between design theory and algebraic geometry/commutative algebra. In particular, given any Steiner SystemS(t, n, v) we associate two ideals, in a suitable polynomial ring, defining a Steiner configuration of points and its Complement. We focus on the latter, studying its homological invariants, such as Hilbert Function and Betti numbers. We also study symbolic and regular powers associated to the ideal defining a Complement of a Steiner configuration of points, finding its Waldschmidt constant, regularity, bounds on its resurgence and asymptotic resurgence. We also compute the parameters of linear codes associated to any Steiner configur…
Manipulation of teenagers through advertising: a critical discourse approach
2011
[EN] The possible harmful effects of advertising in magazines aimed at teenagers have not lost relevance.Thus the aim of this article is to explore the linguistic characteristics used as foregrounding devices in a corpus of English advertisements aimed at teenagers. My underlying premise is that some linguistic messages or images convey information which is picked up by teenagers creating in them the desire to obtain certain products. In my analysis I attempt to ascertain, if any, what kind of linguistic control and what linguistic devices advertisers use to achieve their goal. Additionally, I try to find out to what extent the power of advertising has something to do with social problems r…
Pre-conception maternal helminth infection transfers via nursing long-lasting cellular immunity against helminths to offspring
2019
Mothers transfer immune cells via breastfeeding to provide offspring with long-term protection from parasitic infection.