23 research outputs found
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Analysis of retinotectal regeneration in goldfish using polar dimensions: temporal sequence and spatial order
Quantitative analysis of electrophysiological visuotectal maps using polar dimensions demonstrated uniform representation of visual field on goldfish optic tectum, with topography equally precise in normal and "mature" regenerated projections. The precision of circumferential topography exceeds and is not correlated with that of radial. Radial orderliness may he poor without diminution of circumferential order: these two dimensions of pattern could he generated separately from each other. The method of analysis also allows quantitation of the orientation of the retinotectal projection.
During development radial retinotopy in the sequence of axon growth could contribute to radial topography by confining optic terminals to specific annuli within the projection. The possibility of pattern formation by this means during regeneration was studied by examining the sequence of fibre growth by retrograde labelling of ganglion cells with horseradish peroxidase (HRP), applied to a cut through the optic tract at successive intervals after optic nerve transection in mid-orbit. Most results indicated a central-to-peripheral sequence of regeneration; others showed absence of retinotopic sequence.
Regeneration of axons from central retina was delayed by repetition of axotomy. Subsequent visuotectal maps were either normal or included electrophysiologically weak representation of central visual field on peripheral tectum, outside or superimposed upon the map of peripheral field. Some of the abnormal maps also contained normal representation of central field on central tectum. Because of the contradictions in these results, the influence of temporal sequence on spatial order of connections remains uncertain.
Formation of circumferential topography was investigated by anterograde tracing with HRP of axons from narrow sectors of retina in normal and regenerated pathways. Juxtaposition of labelled axons appears to be completely lost in the optic chiasm or at the site of optic nerve transection. Contact guidance of axons therefore cannot explain circumferential order in the map. Labelling was inadequate to show whether regenerating fibres resegregate retinotopically in the optic tract
CORPORATE SOCIAL RESPONSIBILITY IN ROMANIA
The purpose of this paper is to identify the main opportunities and limitations of corporate social responsibility (CSR). The survey was defined with the aim to involve the highest possible number of relevant CSR topics and give the issue a more wholesome perspective. It provides a basis for further comprehension and deeper analyses of specific CSR areas. The conditions determining the success of CSR in Romania have been defined in the paper on the basis of the previously cumulative knowledge as well as the results of various researches. This paper provides knowledge which may be useful in the programs promoting CSR.Corporate social responsibility, Supportive policies, Romania
Annual Report of the University, 1994-1995, Volumes 1-4
DEMONSTRATING THE STRENGTH OF DIVERSITY A walk around the UNM campus as students change classes demonstrates UNM\\u27s commitment to diversity. Students and professors from a variety of ethnic backgrounds crowd the sidewalks and fill classrooms. Over the past year UNM moved forward with existing and new programs to interest more minority students, faculty and staff in the University and to aid in their success while here. Hispanic Outlook in Higher Education recently recognized the University\\u27s endeavors, ranking UNM as one of the best colleges in the nation at graduating Hispanic students. Provost Mary Sue Coleman says diversity contributes to a stimulating environment where faculty and students have different points of view and experiences. The campus becomes a more intellectually alive place, she says. The efforts to build a diverse campus go hand in hand with the University\\u27s goals of achieving academic excellence and attracting the best and brightest. MINORITY ENROLLMENT In the fall of 1994 a total of 32 percent of the student body came from underrepresented groups. The UNM School of Law had the largest number of Native Americans enrolled in any law school in the country
The social organisation of news production: a case study of BBC radio and television news
This is a case study in the microsociology of knowledge conducted in the London-based News Division of the British Broadcasting Corporation during 1972-3. The data was gathered by fieldwork in Broadcasting House and Television Centre.
The study falls into two parts. The first, after a review of relevant literature, presents a detailed account of those dimensions of the organisational milieu necessary for an understanding of broadcast news production. These are: the hierarchical control structure which determines policy for news coverage; the everyday production routines which structure ânewsâ as an organisational product; the system of advanced planning through which news stories are identified. This section also locates the legitimising role played by the BBCâs editorial philosophy and power structure, and considers implications of the broadcasterâs conventional distinction between ânewsâ and âcurrent affairsâ.
The second part of the study develops the idea of news producers as constituting and epistemic community whose work skills, organisational location, and occupational knowledge give them a distinctive cognitive orientation. Newsmenâs characterisation of their thought and practice as âprofessionalâ is analysed as a mode of conferring authority upon the production process, and the product ânewsâ. It is then argued that newsmenâs primary framework of reference is the organisation within which they assert their complete autonomy from the audience, while at the same time asserting their unique capacity to determine its needs for news. Next, âimpartialityâ is analysed as a distinctive corporate conceptions drawn from a model of the political consensus represented by the major Parliamentary political parties, and is presented as illus-trating the BBCâs accommodation to the realities of State power. Newsmenâs claim to be accurate is next considered. It is shown how they support their claim by pointing to empiricist methods of authentication. The specific character of these is demonstrated by showing how news production is heavily condition-ed by the temporal imperatives of the daily news cycle. The study then concludes after considering newsmenâs time-conscious-ness; their professionalism in this context is analysed as being in control of the pace of often unpredictable work
The measurement of occupational identity.
SIGLELD:D47094/83 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
Studies on Andrographis paniculata (Burm. f.) Nees (HDM 15) a medicinal native plant of Brunei Darussalam
Ethno botanical surveys have revealed that Brunei Darussalam has a rich source of tropical medicinal plants. As 80% of the country's land is covered by tropical rainforest, Brunei Darussalam may have some medicinal plants with unique characteristics of secondary metabolites. Some plants such as Catharanthus roseus (L.) G. Don and Eurycoma longifolia Jack have long been used by the local communities to treat various disease conditions. However, no research has been done in terms of the constituents or biological activities of the Brunei Darussalam medicinal plants. We have investigated the genetic variability diversity and pharmacological actions of Andrographis paniculata (Burm.f.) Nees [1] also known as Daun Pahit or Chuan Xin Lian or King of Bitters by an interdisciplinary approach, involving DNA-based RAPD and RFLP analyses, HPLC-based chemical analysis as well as cell cult ure and tissue-based bioassays. We have demonstrated that Andrographis paniculata extracts exhibited a range of actions including antioxidant, anti-allergies, anti-inflammatory and anti-cancer effects. Some of the pharmacological actions of Andrographis paniculata are co-related with their active constituents Andrographolide (A) and Dehydroandrographolide (D). The study is valued not only in obtaining experimental evidence for supporting traditional use of native medicinal plants but also in establishing a platform for studying other medicinal plants in Brunei Darussalam