The angiogenetic effect of intramuscular administration of b-FGF and a-FGF on cardiac muscle: The influence of exercise on muscle angiogenesis     

Anna Efthimiadou  Byron Asimakopoulos  Nikos Nikolettos  Alexandra Giatromanolaki  Efthimios Sivridis  Theodoros S. Lialiaris 《Journal of sports sciences》2013,31(8):849-854

Abstract

Although angiogenetic therapy using recombinant growth factors holds much hope for the treatment of ischaemic diseases, there are still many unanswered questions, including the method of administration, the correct dose of these factors, and the duration of the therapeutic approach. Exercise has also been suggested to induce neovascularizaiton in muscles. We evaluated the angiogenetic effects of the intramuscular administration of basic-fibroblast growth factor (b-FGF) and acidic-fibroblast growth factor (a-FGF) in rat heart, compared with rats who exercised daily. In conclusion, both the intramuscular administration of b-FGF and exercise increased significantly angiogenesis in the heart in contrast to the intramuscular administration of a-FGF, which was ineffective.  相似文献   

Developmental Trajectories of Acculturation in Hispanic Adolescents: Associations With Family Functioning and Adolescent Risk Behavior     

Seth J. Schwartz  Sabrina Des Rosiers  Shi Huang  Byron L. Zamboanga  Jennifer B. Unger  George P. Knight  Hilda Pantin  José Szapocznik 《Child development》2013,84(4):1355-1372

This study examined longitudinal acculturation patterns, and their associations with family functioning and adolescent risk behaviors, in Hispanic immigrant families. A sample of 266 Hispanic adolescents (M_age = 13.4) and their primary parents completed measures of acculturation, family functioning, and adolescent conduct problems, substance use, and sexual behavior at five timepoints. Mixture models yielded three trajectory classes apiece for adolescent and parent acculturation. Assimilated adolescents reported the poorest family functioning, but adolescent assimilation negatively predicted adolescent cigarette smoking, sexual activity, and unprotected sex indirectly through family functioning. Follow‐up analyses indicated that discrepancies between adolescent and parent family functioning reports predicted these adolescent outcomes. Results are discussed regarding acculturation trajectories, adolescent risk behavior, and the mediating role of family functioning.  相似文献   

Nature Center Purposes and Values     

Byron L. Ashbaugh 《The Journal of environmental education》2013,44(3):4-5

Abstract

Using the experiences and perspectives of practicing environmental educators, the author identified the elements that contribute most to effective environmental education. First, interviews were conducted with 18 experienced environmental educators from 11 states. Factors that appeared fundamental to the teachers' successes were assembled into an initial elements-of-success framework, consisting of 42 elements arranged in 3 categories: teaching conditions, teacher competencies, and teaching practices. The framework was then sent in survey form to environmental educators across the country. The survey yielded strong and consistent confirmation that environmental educators across the country believe the framework provides a valid and useful representation of the major elements that contribute to successful environmental education.  相似文献   

The University as Microcosm     

Byron  Kaldis 《Educational Philosophy and Theory》2009,41(5):553-574

This paper puts forward the model of 'microcosm-macrocosm' isomorphism encapsulated in certain philosophical views on the form of university education. The human being as a 'microcosm' should reflect internally the external 'macrocosm'. Higher Education is a socially instituted attempt to guide human beings into forming themselves as microcosms of the whole world in its diversity. By getting to know the surrounding world, they re-enact it intellectually. Such a re-enacting is a guiding theme in certain philosophies of education studied here. It is with the Neo-Humanist tradition culminating in Humboldt's reforms that an additional step was taken: the university should become itself the reflecting 'microcosm'. This role is nowadays taken up by unconventional LLE, though with far-reaching changes.
The paper is divided into four interconnected Sections each one developing a specific manifestation of the micro-macro relationship.
The main thesis is that: (I) contemporary schemes of never-ending higher education or of so-called 'transformative learning' and of 'universities-multiversities' have their intellectual underpinnings either in similarity or in direct contrast to specific predecessors. Inherent tensions found in these predecessors have left their mark on this micro-macrocosmic model to the extent that it is present in them; (II) the proposed analysis in terms of this model enhances significantly our in-depth understanding of some latent aspects in current trends in LLE and related innovative university schemes; at the same time this model helps us structure appropriately and without anachronisms our humanisticly-inspired critical response to them for abandoning the ideal of the 'wholeness' of the human person.  相似文献   

LIFE AND DEATH AS PUBLIC POLICY: CAPITAL PUNISHMENT AND ABORTION IN AMERICAN POLITICAL OPINION   总被引：1，自引：0，他引：1  

Claggett  William J. M.; Shafer  Byron E. 《Int. Journal of Public Opinion Research》1991,3(1):32-52

Recent decisions of the US Supreme Court, in returning to theissues of capital punishment and abortion, have simultaneouslyexpanded the potential for public opinion on these issues tohave an impact on public policy. This article considers thedistribution of the available combinations of attitudes towardissues of the institutionalized taking (or preservation) ofhuman life, both in the general American public and in subgroupswhich combine these opinions in distinctive fashion. These patternsare then compared to attitudes among partisan political activists,suggesting a further set of recurring, élite-mass tensions.Finally, the resulting tensions and cross-pressures are examinedfor their relationship to the presidential vote in 1984 and1980.  相似文献   

Symbolic racism: The making of a scholarly myth     

Byron M. Roth 《Academic Questions》1989,2(3):53-65

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Family Interaction Patterns,Career Planning Attitudes,and Vocational Identity of High School Adolescents   总被引：1，自引：0，他引：1  

Byron?K.?HargroveEmail author  Arpana?G.?Inman  Randy?L.?Crane 《Journal of Career Development》2005,31(4):263-278

The purpose of the current study was to examine how perceptions of family interaction patterns as defined along three dimensions of family environment (quality of family relationships, family goal-orientations, and degree of organization and control within the family system) predict vocational identity and career planning attitudes among male and female adolescents living at home. One hundred twenty three high school students completed measures of family environment, vocational identity, and career planning attitudes. Analyses revealed that the quality of family relationships (i.e., degree to which family members are encouraged to express feelings and problems) played a small, yet significant role in predicting career planning attitudes of adolescents.  相似文献   

Predictability of observed mother-child interaction from preschool to middle childhood in a high-risk sample   总被引：1，自引：0，他引：1  

Weinfield NS  Ogawa JR  Egeland B 《Child development》2002,73(2):528-543

This study examined predictability of observed parent-child interaction from preschool to middle childhood in 283 mother-child dyads. Participants were welfare recipients enrolled in the Observational Study of the Job Opportunities and Basic Skills Training Program. Structured observational sessions were conducted both at preschool age and middle childhood, and were coded for maternal social behavior, child social behavior, and dyadic interaction. Analyses explored direct relations between the assessments; relations between the assessments with possible third-variable influences, such as maternal literacy, covaried out; and moderated relations. Results indicated that observed mother-child interaction in middle childhood could be significantly predicted from observed interaction 4 years earlier. Risk status moderated the relations such that those families with greater risk factors tended to show more stability, although this stability was, at times, through maintaining suboptimal functioning.  相似文献   

Attitudes toward science and science knowledge of intellectually gifted and average students in third,seventh, and eleventh grades     

Byron L. Barrington  Bryan Hendricks 《科学教学研究杂志》1988,25(8):679-687

A questionnaire regarding attitudes toward science and scientific knowledge (Yager & Yager, 1985b) was administered to 143 intellectually gifted (IQ > 130) and intellectually average third-, seventh-, and eleventh-grade students. Measures of internal reliability on four attitude subscales and a content knowledge subscale are reported. Three-way ANOVAs comparing grade, sex, and ability revealed significant differences between average and gifted students in attitudes toward being a scientist, usefulness of science, and, as might be expected, in knowledge of science. Similarly, there were significant differences between grades on attitudes toward teachers and toward science classes, with the most favorable attitudes expressed in third grade, next most favorable in eleventh grade, and clearly more negative attitudes expressed by students in seventh grade. There also was a significant interaction between grade level and ability regarding attitudes toward science classes. In contrast to what might be expected from reported differences between males and females in attitudes toward science, gender as a separate variable did not have a significant main effect in any of the comparisons.  相似文献   

A Lot of Reaching     

Gilbert Byron 《The Educational forum》2013,77(2)

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