Objective: To investigate the effect of interleukin-18 (IL-18) on immune response induced by plasmid encoding hepatitis B virus middle protein antigen and to explore new strategies for prophylactic and therapeutic HBV DNA vaccines. Methods: BALB/c mice were immunized with pCMV-M alone or co-immunized with pcDNA3-18 and pCMV-M and then their sera were collected for analysing anti-HBsAg antibody by ELISA; splenocytes were isolated for detecting specific CTL response and cytokine assay in vitro. Results: The anti-HBs antibody level of mice co-immunized with pcDNA3-18 and pCMV-M was slightly higher than that of mice immunized with pCMV-M alone, but there was not significantly different (P>0.05). Compared with mice injected with pCMV-M, the specific CTL cytotoxity activity of mice immunized with pcDNA3-18 and pCMV-M was significantly enhanced (P<0.05) and the level of IFN-γ in supernatant of splenocytes cultured with HBsAg in vitro was significantly elevated (P<0.05) while the level of IL-4 had no significant difference (P>0.05). Conclusion: The plasmid encoding IL-18 together with HBV M gene DNA vaccines may enhance specific TH1 cells and CTL cellular immune response induced in mice, so that IL-18 is a promising immune adjuvant. 相似文献
Objective: To analyze the association between attitudes of filial responsibility and adult child caregivers’ behaviors in the Southern Region of Brazil.
Methods: Cross-sectional study with 100 child caregivers of older adults. The data were collected through an interview using the protocol of filial responsibility adapted and validated to Brazilian Portuguese. Filial Expectation and Filial Piety scales evaluated the attitudes of filial responsibility. Caring behaviors assessed were: instrumental support, emotional, financial support, and companionship. The variables that presented p< .20 value in the bivariate analysis were inserted into a multivariate Poisson regression model.
Results: Financial and emotional support behaviors were significantly associated with filial piety (p = .050 and p = .001, respectively) and filial expectation (p = .013 and p = .023, respectively). Providing companionship was associated with filial piety (p = .015).
Conclusion: Attitudes of filial responsibility are associated with some but not all caregiving behaviors. Brazilians caring for older parents show more similarities to Chinese than to Canadian caregivers. Furthermore, filial responsibility and caregiving behaviors are strongly affected by Brazilian social and cultural norms. Reasons are discussed. 相似文献
Summary The paper focuses upon curriculum planning in the scientific disciplines at university level, although it is claimed the argument
may be of wider applicability. Drawing upon the writings of philosophers of education from several decades ago (notably Schwab and Scheffler) whose work is too often overlooked in contemporary debates about the curriculum, and using illustrative examples from the
author’s own experience, it is argued that too often the focus of science curriculum planning is the “rhetoric of conclusions”
or the “substantive structure” — the current state of knowledge at the forefront of the respective disciplines — to the neglect
of what Schwab called the “syntactical structure” of the sciences (which roughly approximates their epistemology). This aspect of these
disciplines is essential for the general student trying to become familiar with the nature of science as a broad field of
knowledge, for prospective teachers, and — contra Scheffler’s view — for students who aim at careers as researchers.
Zusammenfassung
Der Beitrag der Epistemologie zur Curriuculumkonstruktion in den Naturwissenschaften
Der Aufsatz fokussiert auf die Curriculumplanung für den naturwissenschaftlichen Unterricht in der universit?ren Lehrerausbildung,
wenngleich behauptet wird, dass dieses Argument weitreichendere Anwendbarkeit besitzt. Der Text knüpft an erziehungswissenschaftlichen
Schriften (insbesondere von Schwab und Scheffler) an, deren Ver?ffentlichung zwar einige Dekaden zurückliegt, deren Beitrag in den aktuellen Debatten aber oft übersehen wird.
Darüber hinaus werden einige illustrative Beispiele aus dem Erfahrungsschatz des Autors genutzt, um zu zeigen, dass der Fokus
der Curriculumplanung für die Naturwissenschaften — dem augenblicklichen Wissensstand der zu berücksichtigenden Disziplinen
zufolge — zu oft in einer „Rhetorik der Schlussfolgerung“ oder „substantivischen Struktur“ besteht, was dazu führt, dass das,
was Schwab die „syntaktische Struktur“ der Naturwissenschaften nennt (und ihrer Epistemologie ziemlich nahe kommt), vernachl?ssigt wird.
Dieser Aspekt jener Disziplinen ist besonders wichtig für Studierende, die allgemeinbildend vertraut werden m?chten mit den
Naturwissenschaften, für angehende Lehrer und — entgegen Schefflers Ansicht — für Studenten, die eine Karriere als Forscher anstreben.
“When walking in quicksand country, carry a stout pole — it will help you get out should you need to. As soon as you start
to sink, lay the pole on the surface of the quicksand. Flop onto your back on top of the pole. Work the pole to a new position:
under your hips and at right angles to your spine. Take the shortest route to firmer ground, moving slowly.”
Piven/Borgenicht 1999, p. 18
This paper was presented at the conference Silence Between the Disciplines, Berlin-Brandenburg Academy of Sciences, Berlin, October 2002. 相似文献
The paper examines the views of students regarding the extent of their participation in the management of their university and their satisfaction with the degree of this participation. After an examination of the literature on student participation in university governance, the author presents the results of a survey based on data collected from 135 students of the University of Cyprus in 2002. According to the findings, respondents believed that their involvement in the management of their institution was very limited. This applied to both high and low levels of decision making, even though respondents recognised that their input was greater in less important decisions. The perceived limited involvement resulted in feelings of frustration and dissatisfaction among students, with the majority of respondents demanding a higher level of participation for all three decision making situations considered in the study. The paper discusses the implications of the findings for the practice of distributed leadership at contemporary universities, with emphasis on the need to abandon outdated leadership models. Specifically, it proposes measures for increasing student participation in university governance in the framework of a distributed leadership approach designed to empower the key stakeholders of higher education. 相似文献
Theories of adolescent connectedness suggest that adolescents strive to become connected by engaging with and valuing the
people, activities, and worlds in their social ecology. The purpose of this study was to examine the psychometric properties
of a measure designed to assess these worlds of connectedness among 320 junior high school students in Taiwan. The subscales
and composite scales evidenced satisfactory reliability and concurrent validity. A hypothesized three-factor, higher order
structural model of connectedness was cross-validated. Girls were generally more connected than boys. Both connectedness to
school and to friends explained more variance in connectedness to self than did family connectedness. There was mixed support
for separation-individuation processes. The measure appears promising in terms of future research on adolescent social development
in the Asia Pacific. 相似文献
The first year of a 5 year professional development project for elementary teachers in two mid-western states integrated a bridge of two distinctly different distance education networks (T-1 and fiber optics) to provide science professional development for elementary school teachers in rural communities. Interactive television (ITV), the title given to the distance component, consisted of a series of twenty-four, 2 h presentations by scientists and content specialists. It provided expansion to the science pedagogical content knowledge of the elementary teachers involved. Eighty-five teachers in 38 school districts from the two states completed individual surveys following the final ITV session. Analysis of variance of participants post-session survey scores yielded differences (p < 0.05) on the subscales measuring perceived effectiveness of using distance education for professional development purposes and years of teaching experience. Teachers with over 20 years of classroom experience perceived the use of distance education technologies for science professional development to be more effective than teachers with 16–20 years of classroom experience. These results might suggest another digital divide. 相似文献
Luciferase from firefly lantern extract was immobilized on CNBr-activated Sepharose 4B. The kinetic properties of immobilized
luciferase were extensively studied. TheKm′ for D-luciferin is 11.9 μmol/L, the optimum pH and temperature for Sepharose-bound enzyme were 7.8 and 25°C respectively.
A luminescence fiber optic biosensor, making use of immobilized crude luciferase, was developed for assay of ATP. The peak
light intensity was linear with respect to ATP concentration in range of 10−9–10−5 mol/L. A biological application was also demonstrated with the determination of serum ATP from rats bred in low versus normal
oxygen environments. 相似文献