Antiviral activities of extracts from Hong Kong seaweeds

We extracted six Hong Kong brown seaweed species with hot water for their antiviral properties. The cytotoxicity and antiviral activity of these extracts were tested by MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenlytetrezolium bromide] method, cytopathic effect reduction assay, and plaque reduction assay. The antiviral effect was further determined by flow cytometric analysis. The results showed that most of these extracts inhibited the propagation of herpes simplex virus types 1 and 2 (HSV-1 and HSV-2) standard strains with very low cytotoxicity to the host cells. The extracts ofHydroclathrus clathratus and Lobophora variegata showed more potential anti-HSV activities than the extracts of the other four seaweeds. They also had moderate anti-respiratory syncytial virus (RSV) activities but could not inhibit influenza A virus. Hydroclathrus clathratus was further extracted by diluted acid and alkali and the antiviral effects of the extracts were also detected. The result showed that the hot water extract contained the main carbohydrate components that exhibited the antiviral activities against various strains of HSV, including the acyclovir-resistant strain. HI-3, a compound fractionated from this hot water extract, showed a dose-dependent anti-HSV activity in flow cytometric analysis and plaque reduction assay.     

Literacy Literacy

The paper argues that the term ‘literacy’ has become attached to too many disparate practices, and that renewed attention needs to be paid to how the acquisition and use of skills of written communication are conditioned by the core structures of the home, the classroom, and the state. It reviews the current usages of literacy and examines the agenda for further research in the central areas of reading and particularly writing. Attention is drawn to the contemporary engagement with literacy as a basic skill, and to the recent implementation in England of the “National Literacy Strategy.” The close parallels between the 19th and early 21st century literacy strategies are noted. If historians wish to apply their research to an interrogation of contemporary ideology and practice, greater attention should be paid to domestic instruction and to the role of government over time.     

Shooting motion in high school,collegiate, and professional men’s lacrosse players

The purposes of this research were to quantify the kinematics of the lacrosse shot, based on arm dominance and player experience level. Male players (N = 39; 14–30 years; high school [n = 24], collegiate [n = 9], professional [n = 6]), performed overhead shots using dominant and non-dominant sides. Motion was captured using a high-speed, 12-camera optical system and high-speed filming. Body segment rotational velocities and joint angles were determined at key points in the shot cycle from foot contact (0% of shot) to ball release (100% of shot). All players shot with less anterior trunk lean, less transverse shoulder rotation, and slower trunk-shoulder rotational velocities with the non-dominant side than the dominant side (all p < 0.05). Professional players produced crosse angular velocities 21% faster than high school or collegiate players (p < 0.05). Transverse shoulder rotation range of motion on both dominant and non-dominant and trunk rotation sides was highest in the professional players (p < 0.05). These kinematic features enable professional players to produce faster ball speeds than younger players (138 ± 7 km/h vs. 112 ± 15 km/h, respectively; p < 0.05). Less anterior lean or suboptimal rotation sequence could increase proximal shoulder forces that could contribute to injury as in other throwing sports.     

General Mass Communication

THE KNOWLEDGE INDUSTRY 200: 1983 EDITION—AMERICA'S TWO HUNDRED LARGEST MEDIA AND INFORMATION COMPANIES (White Plains, N.Y.: Knowledge Industry Publications, 1983---price not given, paper; with hardback edition available from Gale Research Co., Detroit---$98.00)

MASS COMMUNICATION THEORY: AN INTRODUCTION by Denis McQuail (Beverly Hills, Calif.: Sage Publications, 1983---$25.00/$12.50)

CREATING MEDIA CULTURE by Robert P. Snow (Beverly Hills, Calif.: Sage Publications, 1983---$25.00/ $12.50)

THE CRITICAL COMMUNICATIONS REVIEW, VOLUME I: LABOR, THE WORKING CLASS, AND THE MEDIA edited by Vincent Mosco and Janet Wasko (Norwood, N.J.: Ablex, 1983---$37.50/$21.95)

MARCONI TO McLUHAN: A SELECT BIBLIOGRAPHY OF N.Y. TIMES SUNDAY MAGAZINE ARTICLES ON COMMUNICATION, 1900-1980 by Gerald V. Flannery (Department of Communication, University of Southwestern Louisiana, Lafayette, LA 70504---$12.00, paper)

INTRODUCTION TO MASS COMMUNICATION by Jay Black and Frederick C. Whitney (Dubuque, Iowa: Wm. C. Brown, 1983---price not given, paper)     

Parenting priorities and pressures: furthering understanding of ‘concerted cultivation’

This paper re-examines the purposes of a planned and intentional parenting style – ‘concerted cultivation’ – for different middle-class groups, highlighting that social class fraction, ethnicity, and also individual family disposition, guides understandings of the purposes of enrolling children in particular enrichment activities. We examine how parents and their children engage in extra-curricular activities for instrumental reasons with a view to securing skills, qualities and distinction for the future. Additionally, however, enrichment activities are understood as offering present-day values such as enjoyment, social bonding and purposeful activity. The paper also highlights that current policy and broader commercial discourses call for the increased responsibilisation and intensification of parenting, which means that ‘good’ parents are required to ‘buy into’ extra-curricular activities for their children, with concomitant implications for those whose access to activities is limited by economic circumstance.