Biodeterioration of Incralac used for the protection of bronze monuments   总被引：2，自引：0，他引：2  

Christopher J. McNamara  Margaret Breuker  Marie Helms  Thomas D. Perry  Ralph Mitchell   《Journal of Cultural Heritage》2004,5(4):361-364

Outdoor bronze sculptures are highly susceptible to corrosion in many environments and organic coatings are widely used for their protection. The purpose of this study was to determine the susceptibility of the commonly used coating Incralac to biodeterioration by microorganisms. A yeast was isolated from a bronze statue treated with Incralac and its ability to degrade Incralac was determined using growth curves, scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). The organism grew slowly on Incralac in liquid culture, but SEM images demonstrated its ability to adhere to Incralac coated metal. Additionally, the yeast caused a rapid drop in the low frequency impedance of Incralac coated metal that was not observed under sterile conditions, indicating that the organism accelerated deterioration of the coating. The potential for microbial growth to accelerate deterioration of Incralac should be considered when developing a maintenance strategy for the protection of outdoor metal monuments.  相似文献   

Students’ perceptions of career conversations with their teachers     

Kariene Mittendorff  Perry den BrokDouwe Beijaard 《Teaching and Teacher Education》2011,27(3):515-523

Internationally, schools acknowledge their responsibility in guiding students not only in their academic growth, but also in their lifelong career development. In relation to this development, vocational schools in the Netherlands are implementing integral career guidance in which teachers receive a new task in guiding students in developing their own learning and career paths. A questionnaire was developed to investigate students’ perceptions of career guidance by teachers during career conversations, and data involving 28 teachers were collected from 579 students. The study identified four different teacher guidance profiles. Remarkable is that teachers spoke very little about career issues, and school issues were mostly on the agenda. The results indicate that teachers struggle with the transition towards becoming a career guide of students, and aspects influencing the transition into this new role need to be considered.  相似文献   

Anna E. Bülow, Jess Ahmon, Editors , Preparing Collections for Digitization, Facet Publishing, London (2011)184 pp. $99.95.     

Asheleigh A. Perry  Catalog Librarian 《The Journal of Academic Librarianship》2011,37(5):449-450

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Chinese teachers’ perceptions of an online teacher course and its results     

Li  Nan  Taconis  Ruurd  den Brok  Perry 《Learning Environments Research》2022,25(1):115-139

Learning Environments Research - We investigated teachers’ perceptions of an online inservice teacher course in China and its outcomes, as well as connections between these two types of...  相似文献   

How typical children read typical books     

Perry Nodelman 《Children‘s Literature in Education》1981,12(4):177-185

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AN INTEGRATED STUDENT SERVICES DEPARTMENT     

Baroness Perry of Southwark 《Higher Education in Europe》1994,19(3):57-60

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Review article: ‘Child‐minding and Day Nurseries: What Kind of Care? by Betty Mayall and Pat Petrie     

Betty Perry 《Cambridge Journal of Education》1984,14(1):30-32

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The ECS Interstate Migrant Education Project     

J Perry 《Exceptional children》1982,48(6):496-500

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The construction of a questionnaire to evaluate the science orientedness of students' identities as learners from a cognitive perspective     

Ruurd Taconis  Lesley G.M. de Putter-Smits  Steven Henry  Perry J. den Brok  Douwe Beijaard 《Educational Research and Evaluation》2013,19(4):383-400

Forming a science-oriented identity is considered a process underlying both interest and achievement in science education. A questionnaire is developed for describing “identities as learners” and evaluating their science orientedness. The instrument (k = 65) focuses on cognitive aspects. An internal coherence of .88 was found. Five subscales were defined that proved interrelated yet distinguishable. A pilot amongst 40 students from Dutch general secondary education showed that preferring science over non-science subjects and relatively high grades for sciences subjects were strongly correlated to science orientedness of the learner identity (r_s  = .65; p < .001). The results support the reliability and validity of the questionnaire but also point to the importance of identity as a central concept in studying science education. It is concluded that we made a promising step in constructing an instrument for monitoring the development of cognitive aspects of science-oriented identities during (innovative) science education.  相似文献   

Teacher educators’ collaboration in subject departments: collaborative activities and social relations     

Henderijn Heldens  Anouke Bakx  Perry den Brok 《Educational Research and Evaluation》2013,19(7-8):515-536

Teacher educators’ collaboration plays an important role in the improvement of teacher education. Many studies in educational research focus on collaboration from 1 particular perspective. A focus on 2 perspectives, a qualitative (focusing on collaborative activities) as well as a quantitative (focusing on relations) perspective, and relating both perspectives, can add to our knowledge. Data were collected in 3 subject departments of a teacher education institute. Findings indicated that educators’ collaborative networks inside the departments could gain from more coherent and dense relations, and that key players were important to support and sustain collaboration. Both perspectives were mildly related, correlations were found for “degree” and “information” (r = .31, p < .05), “degree” and “joint work” (r = .38, p < .01), and “reciprocity” and “joint work” (r = .33, p < .05), no correlations were found for “degree” or “reciprocity” and “discussing”. At the department level, only mathematics showed significant correlations. Results indicated that, in further research, qualitative aspects as well as quantitative aspects should be included.  相似文献