Stable hydrogen-isotope ratios (deltaD) of keratin provide a novel means for tracking geographical movements of birds and other species. Here we describe a rapid, low cost, analytical approach to facilitate online continuous-flow isotope-ratio mass spectrometry (CF-IRMS) deltaD analyses of keratins (120-160 samples per day) through the use of calibrated keratin working standards and "comparativ...

This article focuses on the experience of two most famous female singing-slaves pre-Islamic era: so called “two grasshoppers”, known as al-Ǧarādatān or Ǧarādatā ʿĀd. Starting from study main sources: al-Ṭabarī, Taʾrīḫ al-rusul wa-l-mulūk, and al-Masʿūdī, Murūǧ al-ḏahab, I then continue with a reflection their association grasshoppers. The aim this contribution is to bring together Arab sources ...

Background and Objectives: Multiple sclerosis is an inflammatory disease of the central nervous system. This is due to migration of peripherally activated lymphocytes to central nervous system leading to inflammatory lesions. However, liver has an anti-inflammatory microenvironment. Myelin expression in the liver of transgenic mice suppresses inflammatory lesions within central nervous system. ...

Animal migration is one of the great wonders of nature, but the factors that determine how far migrants travel remain poorly understood. We present a new quantitative model of animal migration and use it to describe the maximum migration distance of walking, swimming and flying migrants. The model combines biomechanics and metabolic scaling to show how maximum migration distance is constrained ...