Antioxidant activity of jacaranda decurrens Cham.

Many diseases and related degenerative processes including heart, câncer and Parkinson diseases are associated with rcactive oxygen species (ROS). In an effort Io preveni diseases, search for com-pounds with antioxidant activity hás been a major interestof dif-ferent research groups in natural products research. The objective of this research was to investigatethe antioxidant activity of EtOH leaf extract ofjacarando decurrrens and its fractions using the 2,2-diphenyl-2-picrylhydrazyl hydrate (DPPH) assay [lJ, that uses s pé ciro me t ric method to determine radical scavenging activity, Rutinattheconcçntrationof l.Omg-L was used as the standard. Our results ha vê shown lhat crude extract and fractions had anti-oxidant activities mainly if tested at concentrations of 5.0 to 10.0mg-L. such activities, however. were lesser or equal to the standard (Table 1). The triterpenes, ursolic and oleanohc acids, were detected in the crude extract, Jd-1 and Jd-2, Possibly, these triterpenes are the active constituents responsible for the antioxi-dant activity |2j. At lower concentrations (0,6mg-L than the standard. Jd-3 fraction was the most active. The presenceof flavo-noids and glycosilated compounds were detected in jcl-3 fraction (2], This is the first attempt to demonstrate antioxidant activities found i n Já cara n (ia decurrens leaf extracts. Acknowledgements. Re-search funded by FAPESP. The State of São Paulo Research Founda-tion. Brazil, Referentes: 11) Koleva I. et ai. (2002). Phytochem Anal. 13: 8-17, (2! Oh CJ, et ai. (2007)- Free Radie Rés. 41(6): 638-44.

MAGGnet: an international network to foster mitigation of agricultural greenhouse gases.

Research networks provide a framework for review, synthesis and systematic testing of theories by multiple scientists across international borders critical for addressing global-scale issues. In 2012, a GHG research network referred to as MAGGnet (Managing Agricultural Greenhouse Gases Network) was established within the Croplands Research Group of the Global Research Alliance on Agricultural Greenhouse Gases (GRA). With involvement from 46 alliance member countries, MAGGnet seeks to provide a platform for the inventory and analysis of agricultural GHG mitigation research throughout the world. To date, metadata from 315 experimental studies in 20 countries have been compiled using a standardized spreadsheet. Most studies were completed (74%) and conducted within a 1-3-year duration (68%). Soil carbon and nitrous oxide emissions were measured in over 80% of the studies. Among plant variables, grain yield was assessed across studies most frequently (56%), followed by stover (35%) and root (9%) biomass. MAGGnet has contributed to modeling efforts and has spurred other research groups in the GRA to collect experimental site metadata using an adapted spreadsheet. With continued growth and investment, MAGGnet will leverage limited-resource investments by any one country to produce an inclusive, globally shared meta-database focused on the science of GHG mitigation.

Writing groups, change and academic identity: research development as local practice

The development of the research potential of university staff has been given less attention than many other aspects of professional development, particularly teaching development. Yet there is an important need for the development of staff in the research role in the light of growth of higher education and changes to the organisation of the sector in many countries. This article examines one strategy for research development: the use of writing groups. It argues that writing is best seen as a starting point, rather than an endpoint, of the research process and hence that fostering academic writing is a useful place to do research development work. The article provides details of the use of a number of writing groups over three years in a particular faculty and explores the responses of leaders and participants. It identifies factors important in the use of this strategy and focuses on the contextual conditions required for initiatives of this kind to be effectively implemented.

Academic stress in master’s students and its modulatory variables: a between-groups design

The present investigation tries to establish the descriptive profile of the academic stress of the students of the masters in education and to identify which sociodemographic and situational variables play a modulator role. This investigation is based on the Person-Surroundings Research Program and the systemical cognitive model of academic stress. The study can be characterized as transectional, correlational and non experimental. The collection of the information was made through the SISCO inventory of Academic Stress which was applied to 152 students. The main results suggest that 95% of the master students report having felt academic stress a few times but with medium-high intensity. Variables gender, civil state, attending masters and institutional support of the attending masters act as modulators in academic stress.

The potentialities of focus groups in e-business research : theory validation

Focus groups enable the rapid and timely collation, integration and assembly of the views of a variety of different types of stakeholders into plausible theory. This paper examines the usefulness of the focus group as an e-business research method, using a case study of focus group deployment for the purpose of theory validation as its illustration. Our results suggest that a focus group can be effective as a strategy in e-business research, while providing the relevance and multidisciplinary approach found lacking in more common empirical methods. We provide a set of guidelines for effective focus groups in e-business research.

How do native English academic writers and Chinese native speakers writing in English promote their research

This paper reports on an investigation of a rhetorical organization of Applied Linguistics abstracts produced in Anglophone and Chinese academic discourse communities and written by native English and native Chinese speaking scholars. The study utilises the Framework for the Analysis of the Rhetorical Structure of Texts (FARS), proposed by Golebiowski (2009, 2011). FARS provides a functional account of the relational structure of texts in terms of strategies employed by writers to achieve their communicative purposes. I show how the two groups of abstracts utilize different relational schemata in order to indicate the functional prominence of textual propositions. It is proposed that relational choices, which result in differences in the accentuation of communicative messages in the two groups of abstracts, are dictated by cultural traditions and conventions underlying the discourse community into which the authors have been socialized.