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In ovo yolk carotenoid and testosterone levels interactively influence female transfer of yolk antioxidants to her eggs

Mothers can influence prenatal conditions by varying the amount of nutrients, hormones or antioxidants they provide to their developing young. Some of these substances even affect the transfer of these compounds in the next generation, but it is less clear how different maternally transmitted compounds interact with each other to shape reproductive resource allocation in their offspring. Here, we

Zebrafish Differentially Process Color across Visual Space to Match Natural Scenes

Animal eyes have evolved to process behaviorally important visual information, but how retinas deal with statistical asymmetries in visual space remains poorly understood. Using hyperspectral imaging in the field, in vivo 2-photon imaging of retinal neurons, and anatomy, here we show that larval zebrafish use a highly anisotropic retina to asymmetrically survey their natural visual world. First, d

Factors influencing the induction of high affinity antibodies to Plasmodium falciparum merozoite antigens and how affinity changes over time

Understanding the functional characteristics of naturally acquired antibodies against P. falciparum merozoite antigens is crucial for determining the protective functions of antibodies. Affinity (measured as kd) of naturally acquired antibodies against two key targets of acquired immunity, EBA175 and PfRh2, was determined using Surface Plasmon Resonance (SPR) in a longitudinal survey in Nigeria. A

Residual biomass as resource – Life-cycle environmental impact of wastes in circular resource systems

Within an envisioned circular bio-based economy, a key component is the valorization of biomass wastes and residues into valuable products. If the commonly used method of life-cycle assessment (LCA) is applied to such products, an update and adaptation of LCA practice is needed regarding potentially outdated assumptions of residual resources as free from environmental impact. This paper therefore

Geochemistry and U-Pb geochronology of 1590 and 1550 Ma mafic dyke swarms of western Laurentia : Mantle plume magmatism shared with Australia

Three new U–Pb ID-TIMS isotopic ages confirm previous evidence for two geochemically distinct, early Mesoproterozoic pulses of mafic magmatism along the western margin of Laurentia. The first is a U–Pb baddeleyite age of 1590 ± 5 Ma from a dyke swarm in the Tobacco Root Mountains of western Laurentia. It is the first evidence for magmatism of this age in west-central Laurentia. The second is a U–P

Vem har makten över universitetens historieundervisning?

Artikeln är en komparativ studie av historieundervisning vid amerikanska och svenska lärosäten. Skillnaderna till trots märks vissa gemensamma drag såsom att styrmekanismerna har blivit allt fler, vilket har inneburit att den enskilde läraren har fått allt mindre att säga till om, bland annat till följd av en marknadsanpassning av högre utbildning med fokus på mätbarhet och utvärderingar. Samtidig

Academic leadership and commercial activities at research institutes : German evidence

This paper focuses on entrepreneurship by academic leaders. With the use of patents, inventions, and spin-offs to measure commercialization, and directors, research group leaders, and business owners as academic leaders, results, using a sample of more than 2,500 German researchers, show differences across academic leaders and commercialization. Findings for spin-offs are different from those for

Soundgen : An open-source tool for synthesizing nonverbal vocalizations

Voice synthesis is a useful method for investigating the communicative role of different acoustic features. Although many text-to-speech systems are available, researchers of human nonverbal vocalizations and bioacousticians may profit from a dedicated simple tool for synthesizing and manipulating natural-sounding vocalizations. Soundgen (https://CRAN.R-project.org/package=soundgen) is an open-sou

Ungas politiska (icke-)deltagande på sociala medier – hellre offline?

In the Swedish general election in 2018, social media is expected to play a major role for young people, since social media is their most important source for news and communication. This qualitative interview and focus group study analyses attitudes to political participation in social media of 110 Swedish young persons. Using an explorative perspective, this study offers empirical results, based

Maternally derived yolk antioxidants buffer the developing avian embryo against oxidative stress induced by hyperoxia

In oviparous animals, maternally transferred antioxidants protect the embryo from oxidative damage from high rates of reactive oxygen species (ROS) production incurred by rapid growth. Elevated ROS exposure, beyond that incurred by normal growth, can occur as a result of exposure to exogenous factors (e.g. pollutants, toxins, radiation), increasing the risk of oxidative damage, with potentially ad

Remotely sensed soil moisture to estimate savannah NDVI

Satellite derived normalized difference vegetation index (NDVI) is a common data source for monitoring regional and global ecosystem properties. In dry lands it has contributed to estimation of inter-annual and seasonal vegetation dynamics and phenology. However, due to the spectral properties of NDVI it can be affected by clouds which can introduce missing data in the time series. Remotely sensed

Male-biased sex ratios in Australian migrant populations: a population-based study of 1 191 250 births 1999-2015

Background: The naturally occurring male-to-female (M/F) ratio at birth is 1.05. Higher ratios found primarily in countries across Asia have been attributed to prenatal sex selection due to son preference. There is growing evidence that sex-selective practices continue following migration; however, little is known about these practices following migration to Australia.Methods: In this population-b