86 research outputs found
ALDOSTERONE—MEDIATED CHANGES IN LIPID METABOLISM IN RELATIONSHIP TO Na+ TRANSPORT IN THE AMPHIBIAN URINARY BLADDER
No full textChapter 17 Development of an Isolation Procedure for the Brush Border Membrane of an Electrically Tight Epithelium: Rabbit Distal Colon
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Towards a radiocarbon calibration for oxygen isotope stage 3 using New Zealand kauri (Agathis australis)
No full textIt is well known that radiocarbon years do not directly equate to calendar time. As a result, considerable effort has been devoted to generating a decadally resolved calibration curve for the Holocene and latter part of the last termination. A calibration curve that can be unambiguously attributed to changes in atmospheric ¹⁴C content has not, however, been generated beyond 26 kyr cal BP, despite the urgent need to rigorously test climatic, environmental, and archaeological models. Here, we discuss the potential of New Zealand kauri (Agathis australis) to define the structure of the ¹⁴C calibration curve using annually resolved tree rings and thereby provide an absolute measure of atmospheric ¹⁴C. We report bidecadally sampled ¹⁴C measurements obtained from a floating 1050-yr chronology, demonstrating repeatable ¹⁴C measurements near the present limits of the dating method. The results indicate that considerable scope exists for a high-resolution ¹⁴C calibration curve back through OIS-3 using subfossil wood from this source
Murine macrophages stimulated with central and peripheral nervous system myelin or purified myelin proteins release inflammatory products
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Guide to the nature and methods of analysis of the clay fraction of tephras from the South Auckland region, New Zealand.
No full textThe manual outlines some of the more common laboratory procedures available for qualitatively and quantitatively analysing the composition of the tephric clays, many of which are difficult to determine because of their short range order or 'amorphous' nature. Techniques described and assessed in terms of their rapidity and quantitativeness include XRD, IR, DTA, TEM and SEM, sodium fluoride reactivity, chemical dissolution analyses, and surface area measurements. No one technique alone produces a definitive clay fraction analysis of tephric deposits. -from Author
Educating Teachers about the Complex Writing Processes of Preschool Students (Project)
No full textPreschool teachers traditionally view young children’s written literacy development as a linear continuum that progresses from making scribbles, to lines, to letter strings, to invented, and finally, conventional spellings on paper. This project seeks to change preschool teachers’ perceptions of children’s writing development to encompass a more broadened definition of literacy. On the path from emergent to conventional writing, young children naturally negotiate and mediate a number of symbol systems in order to make sense of their worlds and create meaning as they come to understand the complexities and intricacies of the writing process. Exploration of these symbol systems is a crucial step for children to come to understand written language. Unfortunately, with a push for teaching basic skills in the preschool classroom in preparation for the demands of kindergarten, the focus in most classrooms does not lie in an appreciation for these multiple symbol systems. This project, professional development for preschool teachers, will equip educators with knowledge of young children’s complex meaning-making processes and with practical resources, methods, and ideas for the classroom that are sensitive to children’s diverse paths to literacy
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