Decontamination of Biocide Treated Museum Objects of the Swiss National Museum’s Collection by Liquid CO2 Technology     

Marie Wörle  Vera Hubert  Erwin Hildbrand  Elke Mürau  Ingo Mayer 《文物保护研究》2020,65(2):77-85

ABSTRACT

A decontamination treatment using liquid CO₂ (li-CO₂) and specifically developed for the requirements of museum objects (Lombardo, T., M. Wörle, V. Hubert, E. Hildbrand, I. Mayer, C. Hinterleitner, U. von Arx. 2020. “Influence of Process Parameters on Chlorinated Biocide Decontamination by li-CO₂ on Artificially Contaminated Model Materials.” Studies in Conservation, in press, doi:10.1080/00393630.2019.1641001) was first tested on model materials of wood (with and without coating), silk, and wool with different dyes, paper, and leather in order to evaluate possible material changes. Then, selected museum objects from the collection of the Swiss National Museum were treated to determine the efficiency of biocide decontamination and any resulting chemical and/or structural changes. Results show that dichlorodiphenyltrichloroethane (DDT), pentachlorophenol (PCP), lindane, and chlorpyrifos were successfully removed. Wool, silk, leather, and non-coated wood did not experience any detectable modifications, while moderate to major modifications were observed in wood coated with shellac and polychromy.  相似文献   

Four international educational meetings in Latin America. Lima,April/May 1956     

Oscar Vera 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1957,3(1):106-108

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Impact of grade retention and school engagement on student intentions to enrol in higher education in Portugal     

Natalie Nóbrega Santos  Vera Monteiro  Carolina Carvalho 《European Journal of Education》2023,58(1):130-150

Grade retention and inequalities that derive from grade retention can influence student school trajectories and careers. Grade retention can discourage students from education, and increase school failure and dropout. This study explored the relationship between grade retention and student intentions to enrol in higher education. We also studied the role of school identification and behavioural engagement in this relationship. The analysis is based on a sample of 1,089 students (grades 6 to 10) from Portugal, one of the European countries with the highest rates of grade retention. We employed multilevel probit regression modelling with random intercept and fixed slopes to explore both the individual and school level effects of grade retention. The analyses showed that retained students had a lower probability of intent to enrol in higher education and that there was a contextual effect of the number of retained students in the school, on students' probability of intent to enrol in higher education. This association was partially explained at the individual level by students' school identification. Retained students presented lower levels of school identification, which in turn results in lower probabilities of enrolling in higher education. Student behavioural engagement was not associated with grade retention nor student intentions. Our findings suggest the need for interventions that foster students' school identification to overcome the adverse effects of grade retention.  相似文献   

Paraoxonase 1 activity and phenotype distribution in premenopausal and postmenopausal women     

Dra?an Butorac  Ivana ?elap  Sanja Ka?kov  Vera Robi?  Tomislav Mileti?  Zlata Flegar Me?tri?  Andrea Hulina  Krunoslav Kuna  Tihana ?ani? Grubi?i?  Marija Grdi? Rajkovi? 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2014,24(2):273-280

Introduction

Postmenopausal women have higher risk of cardiovascular disease. One of the contributing factors could be reduced activity of anti-atherogenic enzyme paraoxonase 1 (PON1). The aim of this study was to examine differences in the lipid status, paraoxonase and arylesterase PON1 activities and PON1 phenotype in women with regular menstrual cycle and in postmenopausal women.

Materials and methods:

The study included 51 women in reproductive age (25 in follicular and 26 in luteal phase of the menstrual cycle) and 23 women in postmenopause. Lipid parameters in sera were determined using original reagents and according to manufacturer protocol. PON1 activity in serum was assessed by spectrophotometric method with substrates: paraoxon and phenylacetate. PON1 phenotype was determined by double substrate method.

Results:

Compared to the women in follicular and luteal phase, postmenopausal women have significantly higher concentration of triglyceride [0.9 (0.7–1.3), 0.7 (0.6–1.0) vs. 1.5 (0.9–1.7) mmol/L; P = 0.002], cholesterol [5.10 (4.78–6.10), 5.05 (4.70–5.40) vs. 6.30 (5.73–7.23) mmol/L; P < 0.001], LDL [3.00 (2.56–3.63), 3.00 (2.70–3.70) vs. 3.90 (3.23–4.50) mmol/L; P < 0.001], and apolipoprotein B [0.88 (0.75–1.00), 0.79 (0.68–1.00) vs. 1.07 (0.90–1.24) mmol/L; P = 0.002]. PON1 basal [104 (66–260), 106 (63–250) vs. 93 (71–165) U/L; P = 0.847] and salt-stimulated paraoxonase activity [210 (131–462), 211 (120–442) vs. 180 (139–296) U/L; P = 0.857] as well as arylesterase activity [74 (63–82), 70 (54–91) vs. 70 (60–81) kU/L; P = 0.906] and PON1 phenotype (P = 0.810) were not different in the study groups.

Conclusion:

There are no differences in PON1 activity and PON1 phenotype between women with regular menstrual cycle and postmenopausal women.  相似文献   

THE REFORMING PROCESS OF THE SPANISH UNIVERSITY     

Elisa Pérez Vera 《Higher Education in Europe》1987,12(3):34-39

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Engaging plant anatomy and local knowledge on the buriti palm (<Emphasis Type="Italic">Mauritia flexuosa</Emphasis> L.f.: Arecaceae): the microscopic world meets the golden grass artisan’s perspective     

Rebeca V. R. Viana  Vera L. Scatena  Mayra T. Eichemberg  Paulo T. Sano 《Cultural Studies of Science Education》2018,13(1):253-265

Considering that both Western Science and Local Knowledge Systems share a common ground—observations of the natural world—the dialogue between them should not only be possible, but fruitful. Local communities whose livelihoods depend on traditional uses of the local biodiversity not only develop knowledge about nature, making several uses of such knowledge, but, with that process, several inquiries about nature can be raised. Here we present our experience with the engagement of Western Science with golden grass artisan’s knowledge about the buriti palm (M. flexuosa). We applied 25 semi-directive interviews, combined with field diary and participative observation, in two quilombola communities from Jalapão region (Central-Brazil). One of the inquiries that emerged from the artisan’s perspectives was about the differences between male and female buriti palms’ fiber. We then engaged both local and scientific perspectives regarding this issue using plant anatomy as a dialogue instrument. Here we describe this experience and resort to Paulo Freire’s ideas on dialogue to argue that, to integrate Western Science and Local Knowledge Systems in a collaborative and contextualized perspective, the research should be faced as a mutual learning practice.  相似文献   

Peer inquiry: Discovering what you know through dialogue     

Linney Wix  Vera John-Steiner 《Thinking Skills and Creativity》2008,3(3):217-225

The article discusses a dialogical peer inquiry process as a practice of co-constructing knowledge in graduate coursework. The process, formerly structured as an exam, was developed by Dr. Vera John-Steiner more than 30 years ago and has been implemented in adapted forms by her students in their teaching. The dialogical peer inquiry process involves collaborating creatively with peers in the co-construction of knowledge. The article discusses the underpinnings of the process and uses voices of students in a graduate art education course to illuminate the process and its meanings for students.  相似文献   

Prefix identification in the reading of Dutch bisyllabic words     

Ludo Verhoeven  Robert Schreuder  Vera Haarman 《Reading and writing》2006,19(7):651-668

Two experiments were conducted in order to explore the role of prefix identification in the reading of Dutch bisyllabic words. Although Dutch orthography is highly regular, several deviations from a one-to-one correspondence exist. A case in point is the grapheme E which can represent the vowels ε, e and œ in polysyllabic words. In Experiment 1, 33 third-grade children and 46 sixth-grade children were presented a list of randomly ordered bisyllabic words starting with the letter string BE and the first syllable being (1) a real prefix, (2) a phonological prefix (same sound pattern as a prefix), or (3) a pseudoprefix (sound pattern deviant from a prefix). Pseudowords starting with the same letter string were also presented. The results showed that words starting with a real or a phonological prefix were identified more accurately than words starting with a pseudoprefix. For the pseudowords, a predominant interpretation of the first part as a prefix was also evidenced. In Experiment 2, a lexical decision task was administered to 35 third-grade children, 33 sixth-grade children, and 26 adults. Words with a phonological prefix and words with a pseudoprefix were randomly presented along with other word types. The data showed both children and adults to retrieve words with phonological prefixes more quickly and more accurately than words with a pseudoprefix. The results are discussed with reference to current models of word decoding.  相似文献   

Analysis of lexical quality and its relation to writing quality for 4th grade,primary school students in Chile     

Gabriela Gómez Vera  Carmen Sotomayor  Percy Bedwell  Ana María Domínguez  Elvira Jéldrez 《Reading and writing》2016,29(7):1317-1336

Few studies have addressed vocabulary quality in developing writing skill in Spanish. Even less addressed it within the Chilean educational system. The specific objective of this study was to characterize, using a comprehensive set of indicators, the quality of the vocabulary produced by Chilean 4th grade students. Based on a national writing survey, a sample of 2056 texts written by 685 students was collected (narrative, persuasive, and informative texts). Current literature defines lexical quality as a composite of diverse factors that, while distinct, are interrelated. To represent the properties of the vocabulary, a set of indicators were selected: (a) lexical diversity; (b) lexical sophistication; and (c) lexical density. Using multilevel modeling (students and schools as levels 1 and 2) to explain a global writing score we found that diversity was a significant determinant for narrative and persuasive texts, density was a significant determinant for the three genres and sophistication was a significant determinant for narrative and expository text. In addition, indicators related to gender and socioeconomic conditions were only significant determinants of narrative stories. The parts of speech most often used also varied according to the purpose of each text. In all genres, words had a short extension and were very sensitive to the input presented in the stimuli. These results imply a significant challenge to this education system: how to promote the development of vocabulary in all children in order to support language learning.  相似文献   

Predicting women's college experiences from life history data: A four-year study     

Dr. Hubert S. Feild 《Research in higher education》1976,5(2):125-140

The present study was conducted over a four-year period to determine if life history or biographical information could be used to predict various college experiences of women. At the beginning of their freshman year, 897 women were administered a comprehensive life history questionnaire. During the last quarter of their senior year, 327 women (who received the life history questionnaire four years earlier) completed an inventory which assessed major dimensions of college experiences. Results indicated that life history data could be used to make longitudinal predictions of women's college experiences. The results were discussed in terms of their implications for counseling students in higher education.  相似文献