Specific nucleoside triphosphatases in crude extracts of escherichia coli

General properties and distribution of nucleoside triphosphatases in crude extracts of Escherichia col

Differential distribution of rna and protein in the ribosomal fractions of escherichia coli

Differential distribution of RNA and protein in ribosomal fractions of Escherichia col

Fate of specific ribonucleoside triphosphatases on purification and reconstitution of the ribosomal system of escherichia coli

Fate of specific ribonucleoside triphosphatases purification and reconstitution of ribosomal system of Escherichia col

Evaluating Active U: an Internet-mediated physical activity program.

Background: Engaging in regular physical activity can be challenging, particularly during the winter months. To promote physical activity at the University of Michigan during the winter months, an eight-week Internet-mediated program (Active U) was developed providing participants with an online physical activity log, goal setting, motivational emails, and optional team participation and competition. Methods: This study is a program evaluation of Active U. Approximately 47,000 faculty, staff, and graduate students were invited to participate in the online Active U intervention in the winter of 2007. Participants were assigned a physical activity goal and were asked to record each physical activity episode into the activity log for eight weeks. Statistics for program reach, effectiveness, adoption, and implementation were calculated using the Re-Aim framework. Multilevel regression analyses were used to assess the decline in rates of data entry and goal attainment during the program, to assess the likelihood of joining a team by demographic characteristics, to test the association between various predictors and the number of weeks an individual met his or her goal, and to analyze server load. Results: Overall, 7,483 individuals registered with the Active U website (≈16% of eligible), and 79% participated in the program by logging valid data at least once. Staff members, older participants, and those with a BMI < 25 were more likely to meet their weekly physical activity goals, and average rate of meeting goals was higher among participants who joined a competitive team compared to those who participated individually (IRR = 1.28, P < .001). Conclusion: Internet-mediated physical activity interventions that focus on physical activity logging and goal setting while incorporating team competition may help a significant percentage of the target population maintain their physical activity during the winter months

Suddenly everything was different – private households in the Corona crisis

Die COVID-19-Pandemie hat gesellschaftliches und privates Leben fundamental verändert. Welche Folgen hatte dies für private Haushalte? Mit Hilfe der Kategorien ökonomisches, kulturelles und soziales Kapital wird aufgezeigt, wer besonders die Folgen zu tragen hat(te), welche mit der Pandemie-Bekämpfung einhergingen. (DIPF/Orig.)The COVID 19 pandemic fundamentally changed social and private life. What consequences did this have for private households? With the help of the categories economic, cultural, and social capital, it is shown who had to bear the consequences of the pandemic. (DIPF/Orig.

The relationship between single-sex and co-educational environments on socioemotional development

There have been many debates over the advantages and disadvantages of single-sex education with regards to socioemotional development. Although some research shows that girls are often neglected in the classroom when boys are present, other research states that single-sex education may not be as beneficial as thought. The purpose of this study was to examine the discrepancies between previous research on single-sex and co-educational environments in relation to socioemotional development. Specifically, we investigated the differences in perceived competence, self-esteem, locus of control, and perceived social support. Within these areas of socioemotional development, we expect differences to exist based on educational environment. However, we are reluctant to postulate which educational environment will yield the higher scores in each area since conflicting research is present

Academia.edu: Social network or Academic Network?

Academic social network sites Academia.edu and ResearchGate, and reference sharing sites Mendeley, Bibsonomy, Zotero, and CiteULike, give scholars the ability to publicize their research outputs and connect with each other. With millions of users, these are a significant addition to the scholarly communication and academic information‐seeking eco‐structure. There is thus a need to understand the role that they play and the changes, if any, that they can make to the dynamics of academic careers. This article investigates attributes of philosophy scholars on Academia.edu, introducing a median‐based, time‐normalizing method to adjust for time delays in joining the site. In comparison to students, faculty tend to attract more profile views but female philosophers did not attract more profile views than did males, suggesting that academic capital drives philosophy uses of the site more than does friendship and networking. Secondary analyses of law, history, and computer science confirmed the faculty advantage (in terms of higher profile views) except for females in law and females in computer science. There was also a female advantage for both faculty and students in law and computer science as well as for history students. Hence, Academia.edu overall seems to reflect a hybrid of scholarly norms (the faculty advantage) and a female advantage that is suggestive of general social networking norms. Finally, traditional bibliometric measures did not correlate with any Academia.edu metrics for philosophers, perhaps because more senior academics use the site less extensively or because of the range informal scholarly activities that cannot be measured by bibliometric methods.This paper is supported by ACUMEN (Academic Careers Understood through Measurement and Norms) project, grant agreement number 266632, under the Seventh Framework Program of the European Union

"All life is problem-solving" (Popper). Grasping the complexity of life conduct through problem-based learning

In der Haushaltswissenschaft und der haushaltsbezogenen Bildung besteht eine große Herausforderung darin, Komplexität zu erfassen, zu verstehen und als eine bewältigbare Aufgabe anzunehmen. Problembasiertes Lernen (PBL) bietet ein Konzept, komplexere Frage- und Problemstellungen aus der alltäglichen Lebensführung und deren Verwobenheit mit gesellschaftlichen Rahmenbedingungen zu verstehen. Aus hochschuldidaktischer Sicht werden Chancen und Begrenzungen diskutiert. (DIPF/Orig.)Within home economics and household-related education, a major challenge is to grasp complexity, understand it and accept it as a manageable task. Problem-based learning (PBL) offers a concept for understanding more complex questions and problems from everyday life and how they are interwoven with social conditions. Opportunities and limitations are discussed from the perspective of higher education didactics. (DIPF/Orig.

MySpace and Facebook: Applying the Uses and Gratifications Theory to Exploring Friend-Networking Sites

The increased use of the Internet as a new tool in communication has changed the way people interact. This fact is even more evident in the recent development and use of friend-networking sites. However, no research has evaluated these sites and their impact on college students. Therefore, the present study was conducted to evaluate: (a) why people use these friend-networking sites, (b) what the characteristics are of the typical college user, and (c) what uses and gratifications are met by using these sites. Results indicated that the vast majority of college students are using these friend-networking sites for a significant portion of their day for reasons such as making new friends and locating old friends. Additionally, both men and women of traditional college age are equally engaging in this form of online communication with this result holding true for nearly all ethnic groups. Finally, results showed that many uses and gratifications are met by users (e.g., “keeping in touch with friends”). Results are discussed in light of the impact that friend-networking sites have on communication and social needs of college students

Altered Cytokine Response of Human Brain Endothelial Cells after Stimulation with Malaria Patient Plasma

Infections with the deadliest malaria parasite, Plasmodium falciparum, are accompanied by a strong immunological response of the human host. To date, more than 30 cytokines have been detected in elevated levels in plasma of malaria patients compared to healthy controls. Endothelial cells (ECs) are a potential source of these cytokines, but so far it is not known if their cytokine secretion depends on the direct contact of the P. falciparum-infected erythrocytes (IEs) with ECs in terms of cytoadhesion. Culturing ECs with plasma from malaria patients (27 returning travellers) resulted in significantly increased secretion of IL-11, CXCL5, CXCL8, CXCL10, vascular endothelial growth factor (VEGF) and angiopoietin-like protein 4 (ANGPTL4) if compared to matching controls (22 healthy individuals). The accompanying transcriptome study of the ECs identified 43 genes that were significantly increased in expression (≥1.7 fold) after co-incubation with malaria patient plasma, including cxcl5 and angptl4. Further bioinformatic analyses revealed that biological processes such as cell migration, cell proliferation and tube development were particularly affected in these ECs. It can thus be postulated that not only the cytoadhesion of IEs, but also molecules in the plasma of malaria patients exerts an influence on ECs, and that not only the immunological response but also other processes, such as angiogenesis, are altered