Two unknown radioactive areas appeared after radioautography and two dimensional paper chromatography of culture medium in which Escherichia coli was grown. These materials were studied by paper chromatography and paper electrophoresis of several derivatives and identified as ethionine and ethionine sulfone, the latter an artifact. Chromatographic coincidence of the unknowns and their derivativ...

Materials indistinguishable from authentic monoand diiodotyrosines were identified in extracts of normal human serum as well as in extracts of purified human serum albumin. These materials were not found in association with the other serum proteins. Identification of MIT and DIT was made by a technique using rechromatography to constant specific activity, as well as by the Barker wet ash distil...

This paper aims to extract lessons from archivists’ experience of appraising electronic records that are likely to have wider application in the preservation of other digital materials, including scientific data. It relies mainly on the work of the Appraisal Task Force of the InterPARES project on long-term preservation of authentic electronic records to develop a picture of the process of appr...

This study developed and tested a theory-based measure of authentic leadership using five separate samples obtained from China, Kenya, and the United States. Confirmatory factor analyses supported a higher order, multidimensional model of the authentic leadership construct (the Authentic Leadership Questionnaire [ALQ]) comprising leader self-awareness, relational transparency, internalized mora...

Handwriting experts are usually required to differentiate between authentic and forged signatures. Therefore, it is important to develop an objective system to identify forged handwriting, or at least to identify those handwritings that are likely to be forged. Forgers often forge handwriting in terms of shape and size by carefully copying or tracing the authentic handwriting. We hypothesize, t...

This article presents a study that provides insight in the effects of an authentic electronic learning environment on student performance and experiences. It is expected that learning in an authentic learning environment results in higher performance and improves intrinsic motivation of students. The results of this study showed, contrary to what was expected, that student who worked in an auth...

The concept of authentic leadership is increasingly the focus much scholarship, and many have called for a review basic assumptions that underpin it. Taking an interactional approach to (AL) using naturally occurring workplace interaction as data, we seek question two AL namely (1) emanates from atomized leader (2) there causal logic it so behaviours are cause follower outcomes. Addressing rese...