New Medium (new + medium)

Distribution by Scientific Domains

Selected Abstracts

Effect of thermal treatment of incubated potato juice on the formation of Maillard volatiles

Stephen J. Davids
Summary Potato juice samples, obtained from potatoes stored at different temperatures (0,24 °C) and times (8,20 weeks), were incubated (45,57 °C for 42 h) with or without commercial proteases. The samples were then used for thermal browning experiments by placing in either a heated oven at 125 °C overnight or in an autoclave at 132 or 121 °C for 1 h, these experiments promoted the occurrence of the Maillard reaction. After the heat treatment step, all samples were extracted with methylene chloride and analysed by gas chromatography/mass spectrometry. The data indicated that, by subjecting the potato juice to thermal treatments, a wide variety of volatiles generated by the Maillard were produced and these are known to be associated with specific flavour notes, examples are alkyl and acetyl pyrazines, piperazinediones, furans and pyrroles. These findings suggest that the study of potato juice extract as a new medium for flavour development, in particular in those applications which presently use malt, coffee, soybean, meat and yeast extracts, is a worthwhile endeavour. [source]

Uses and Gratifications of the Web among Students

Samuel Ebersole
This study was designed to explore how some students in ten public schools view the WWW and how their attitudes and opinions affect their use of this new medium in an educational context. An exploratory principal components analysis of forty use statements resulted in an eight factor solution. Additionally, student responses to a computer-administered survey instrument were collected and analyzed revealing significant differences in the way that students describe their use of the WWW. Gender, grade level, and amount of time spent using the WWW were used to create between-group comparisons of the WWW use categories that made up the computer-administered survey instrument. The final phase of data analysis was a content analysis of sites visited by students. A total of 123,071 URLs were collected from the computers used to administer the computer survey instrument. These were reduced to a total of 500 sites that were reviewed by media specialists. Students were found to be visiting commercial sites at a much higher proportion than those in other domains. Also, the commercial sites received the lowest rating for "suitability for academic research" of all the domain names. And while students reported their purpose for using the WWW as "research and learning" fifty-two percent of the time, the coders found only twenty-seven percent of the sampled sites to be "suitable" for that purpose. [source]

MPs and web technologies: an untapped opportunity?

Nigel Jackson
Abstract MPs have not previously been assigned a major role in electoral campaigning, being considered only one element of a political party's ,marketing' tools for winning votes. Evidence now suggests that the relationship between MPs and their constituents is changing. The concept of ,constituency service' implies that individual MPs can have a much greater influence on local voters and so possibly buck national trends. At the same time the concept of the ,permanent campaign' is transforming political campaigning whereby the political elite needs ever-greater control of the tools used to provide messages to voters. The internet is a potential battleground between MPs who want greater control of their own local campaigning and the party elite who want to ensure a consistent, coherent and controlled message. The Internet is a new addition to the campaigning armoury, yet the focus so far has been on e-government, e-democracy and election campaigns. By concentrating on how and why MPs use their websites this paper considers whether MPs have fully understood and utilised this new medium. Key questions include whether their websites are ,sticky', interactive and a means of creating a targeted message. The findings of this detailed study of MPs' websites show that apart from a few pioneers, MPs have not progressed beyond using the Internet as ,shovelware' , the vast majority view their website as an electronic brochure and not a new form of two-way communication. Copyright © 2003 Henry Stewart Publications [source]

Improved approach for transferring and cultivating Methanosarcina acetivorans C2A (DSM 2834)

H. Summer
Abstract Aim:, A method for cultivating Methanosarcina acetivorans was further developed to handle these anaerobic archaea without special equipment such as an anaerobic chamber. Methods and Results:, Medium was filtered and oxygen removed under a nitrogen gas-phase. A dithiothreitol-filled syringe was used to transfer cells from high density grown cultures to new medium. Growth time and cell mass were determined, as well as cell viability was proven by light microscopy. Conclusion:, Cell transfer and growth was successful using this approach. Significance and Impact of the Study:, This updated technique allows almost every laboratory the opportunity to grow these methanogenic organisms for further studies. The described method could be used for proteomic analysis and is also interesting for further protein structure determination. [source]

Dead Birds Migrating: DVD Reinvigorates Classic Ethnographic Film

The DVD release of Robert Gardner's Dead Birds exemplifies the added value of extra features and the improvement in viewing quality when existing ethnographic films are distributed in this new medium. Whereas in the past, ethnographic films have been experienced as transitory performances, a nonlinear medium like DVD makes it possible to read a film the way one reads a book, stopping, reflecting, and reviewing. The inclusion of multiple soundtracks, additional sequences, and associated texts affords a density of content that has not previously been possible in either films or books. [source]

Chlamydosporulation of Candida albicans and Candida dubliniensis on mustard agar

MYCOSES, Issue 1 2007
C. P. Girish Kumar
Summary Chlamydospores are distinctive morphological forms characteristic of Candida albicans, a phenomenon shared only with the closely related species Candida dubliniensis. The production of chlamydospores has remained an important diagnostic criterion for the differentiation of C. albicans and C. dubliniensis from other yeast. We herein describe a new medium, mustard agar, for chlamydosporulation in Candida. All the strains of C. dubliniensis and C. albicans tested produced chlamydospores on mustard agar, whereas none of the other five species produced chlamydospores. [source]

Differences between peer victimization in cyber and physical settings and associated psychosocial adjustment in early adolescence

Allison G. Dempsey
The increasing use of cyberspace as a social networking forum creates a new medium for youth to become victims of peer aggression. This study used factor analysis techniques to confirm whether survey questions about frequency of cyber victimization formed a distinct latent construct from questions about relational and overt victimization information in a large (N = 1,665) sample of middle school students. A secondary goal was to relate experiences of cyber victimization to symptoms of depression and social anxiety. Results indicate that cyber victimization is separate latent factor from overt and relational victimization. Experiences of cyber victimization were weakly associated with symptoms of social anxiety, but not depression. These results signify that cyber victimization deserves future empirical and clinical attention. © 2009 Wiley Periodicals, Inc. [source]

On the Hot Seat: Mike Wallace interviews Marcel Duchamp

ART HISTORY, Issue 1 2000
Naomi Sawelson-Gorse
Marcel Duchamp (1887,1968) attained fame early in his career due to the succès-de-scandale surrounding his painting, Nude Descending the Staircase, No. 2 (1912), when it was exhibited at the 1913 New York Armory Show. Seemingly derisive of all Western aesthetic canons, the work came to embody the general public's outrage and confusion about modern art, which seemed to them merely a shameless hoax, while it achieved an iconic stature for modern art's defenders and supporters. Similar polar sentiments persisted in mid-century. Concurrent with Duchamp's re-emergence as an art celebrity, the then new medium of television broadcast art-based programmes directly targeted at a burgeoning American middle class (mostly white, Eastern, suburbanites), who were themselves fuelling an ever-expanding and high-priced art market. With inflated prices, the nagging question was whether consumers were being bilked by the so-called ,crook-and-swindle' business of art. In Duchamp's television interview with Mike Wallace that aired in New York on 18 January 1961, which is transcribed for the first time in English in this article, the ,crook-and-swindle, business of art, especially about modern art, takes centre stage, as the artist comments on numerous artists and critics, and reflects on his own artistic production, relationship to the art market and celebrity status. [source]

Effects of an exopolysaccharide (kefiran) on lipids, blood pressure, blood glucose, and constipation

BIOFACTORS, Issue 1-4 2004
Hiroaki Maeda
Abstract Lactobacillus kefiranofaciens was reported to produce an exopolysaccharide named kefiran. In the present study, we developed a new medium, rice hydrolyzate (RH) medium, for the culture of L. kefiranofaciens. Structural analyses revealed that the exopolysaccharide produced by L. kefiranofaciens from RH medium was composed of a hexasaccharide repeating unit, and essentially identical to the kefiran reported in previous studies. A study on the effects of kefiran in animals demonstrated that kefiran significantly suppressed increase of blood pressure and reduced the serum cholesterol levels in SHRSP/Hos rats when subjects consumed excessive dietary cholesterol. Kefiran supplementation demonstrated the ability to significantly lower blood glucose in KKAy mice. In addition, the administration of kefiran in constipated SD rats caused an obvious improvement in the levels of fecal moisture and wet weights of feces. These results suggest that kefiran could be used as a functional food to prevent some commonly occurring diseases. [source]

Time- and dose-dependent mitogenic effect of basic fibroblast growth factor combined with different bone graft materials: an in vitro study

Xanthippi E. Dereka
Abstract Objectives: In periodontal regeneration, the growth factor concentrations and the delivery system used are of great importance. In an attempt to assess the mitogenic effect of basic fibroblast growth factor (bFGF) on periodontal ligament (PDL) cells combined with different bone replacement materials, two allografts of cortical (DFDBA) and cancellous (DFBA) bone and an anorganic bovine material with a synthetic peptide (ABM P-15) were used. The purpose of this study was to evaluate the in vitro mitogenic effect of different doses of bFGF alone or in combination with DFDBA, DFBA and ABM P-15 on human PDL cells in a time-dependent mode. Material and methods: PDL cell cultures were derived from the mid-root of four maxillary premolars. Cells were grown and reached confluence. On day 2 of quiescence, new medium was added along with (1) 1, 5, 10 and 25 ng/ml of bFGF alone, (2) 10 mg of DFDBA, DFBA and ABM P-15 alone and (3) their combination. The mitogenic effect was determined at 24 and 48 h of culture by using a hemocytometer chamber. The cells were counted under a phase contrast microscope. Results: The results revealed that bFGF at the highest concentrations and after 48 h exerted a significant mitogenic effect on PDL cells, and also DFDBA and DFBA supported cell proliferation. Furthermore, DFDBA and DFBA enriched with bFGF had a significant mitogenic effect after 48 h of culture. ABM P-15 with 10 and 25 ng/ml of bFGF up-regulated PDL cell proliferation after 48 h of incubation. Conclusions: The findings of this study demonstrate the beneficial role of bFGF combined with DFDBA and DFBA as carriers in periodontal repair. [source]