243,141 research outputs found
Lifelong Learning Goes to the Movies: Autobiographical Narratives as Media Production
A blockbuster of a paper (nominated for Best Foreign Contribution) in which the heroine describes a perilous path through the territory of narrative theory and text construction. She encounters the threshold guardians of writer’s block and self-doubt, wrestles with shapeshifters, tricksters and shadows, rallies after encounters with mentors and allies and returns to the ordinary world with the elixir of lifelong learning (or, at least, a completed conference paper)
Applying Insights from Cultural Studies to Adult Education: What Seinfeld Says About the AERC
The zany adventures of a glamorous British professor who goes to an important international conference but spends most of her time searching for a TV in order to watch her favourite sitcom. Despite her commitment to \u27no hugging, no learning\u27, she gains some profound insights into mass culture, adult education, friendship and postmodernity as a result. Parental guidance suggested
Construction and utilisation of a bidirectional reporter vector in the analysis of two nod-boxes in of Rhizobium loti : a thesis presented in partial fulfilment of the requirements for the Degree of Master of Science in Molecular Genetics at Massey University
The nod-box is a 47bp cis-acting regulatory region which has been conserved amongst every species of Rhizobium studied to date. In species such as R. meliloti and R. leguminosarum, the nod-box has been shown to promote constitutive activity towards the regulatory nodD gene, and flavonoid-inducible expression towards the divergently-transcribed nodABCIJ operon. This bidirectional regulation of the so-called common nod genes was not observed in R. loti. A previous analysis of this species had shown that its nod-box promoted inducible activity towards the truncated 'nodD' gene,
as well as the nodACIJ operon. It was the unusual arrangement of these R. loti nod
genes that had initially aroused interest in this bacteria.
To further investigate the role of the nod-box in the regulation of the R. loti common nod genes, a bidirectional reporter vector (pSPV4) was constructed. This novel vector allowed the promoter activity of a cloned nod-box-containing fragment to be concurrently measured in either direction using the same culture of cells. To achieve this construct, the gusA gene from pRAJ260 was blunt-end ligated into pUC21. An in-frame ribosome binding site (rbs) was cloned upstream of the gusA coding sequence to facilitate transcriptional fusions. The rbs and gusA gene were later excised as a functional unit and blunt-end ligated into pMP220 alongside the B-galactosidase reporter gene but in the opposite orientation. Hence, both reporter genes could be divergently transcribed from a common regulatory region cloned into the multiple cloning site that separated the genes.
The fragments of DNA that were eventually cloned into the bidirectional vector were generated through the polymerase chain reaction. Each DNA insert contained the nod-box bracketed by differing lengths of flanking region. Once these PCR-generated fragments had been sequenced in pUC118 and subcloned into pSPV4, the resulting constructs were transformed into R. loti cells by electroporation. As the electroporation of these cells had not previously been reported, the conditions for this procedure were established and optimised.
The results obtained from the bidirectional reporter assays disagreed with those observed in the earlier assays by Teo (1990). Neither the nodACIJ nod-box of NZP2037 nor the nodB nod-box of NZP2213, showed bidirectional inducible expression. In fact, both nod-boxes showed constitutive expression in the 'nodD' direction and inducible expression in the opposite direction. This indicates that the control of the nod genes in
R. loti is fundamentally the same as that seen in other fast-growing Rhizobium species. Three regulatory elements affecting the levels of nod gene expression have tentatively been identified outside the nod-box sequence, though the results indicating their presence may simply be·due to spacing differences between the nod-box and the reporter gene
Gad65 is recognized by t-cells, but not by antibodies from nod-mice
Since the 64kDa-protein glutamic acid decarboxylase (GAD) is one of the major autoantigens in T-cell mediated Type 1 diabetes, its relevance as a T-cell antigen needs to be clarified. After isolation of splenic T-cells from non-obese diabetic (NOD) mice, a useful model for human Type 1 diabetes, we found that these T-cells proliferate spontaneously when incubated with human GAD65, but only marginally after incubation with GAD67, both recombinated in the baculovirus system. No effect was observed with non-diabetic NOD mice or with T-cells from H-2 identical NON-NOD-H-2g7 control mice. It has been published previously that NOD mice develop autoantibodies against a 64kDa protein detected with mouse beta cells. In immunoprecipitation experiments with sera from the same NOD mice and 33S-methionine-labelled GAD, no autoantibody binding could be detected. We conclude firstly that GAD65 is an important T-cell antigen which is relevant early in the development of Type 1 diabetes and secondly that there is an antigenic epitope in the human GAD65 molecule recognized by NOD T-cells, but not by NOD autoantibodies precipitating conformational epitopes. Our results therefore provide further evidence that GAD65 is a T-cell antigen in NOD mice, being possibly also involved in very early processes leading to the development of human Type 1 diabetes
Animating Learning: New Conceptions of the Role of the Person Who Works with Learners
This paper focuses on the role of the person who works with others to foster their learning and describes our struggle to make sense of this role. We identify a perspective termed animation, consider its features and discuss issues of context, identity and relationships between animators and learners
Palindromania: Don\u27t Nod
In this article, the reader is invited to complete the following palindromic sentences (with all vowels except Y identified). Each palindrome is clued by a rhymed couplet, and capitalized words are labeled with an asterisk. Answers can be found in Answers and Solutions at the end of this issue
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