Eyelid development, fusion and subsequent reopening in the mouse

The process of eyelid development was studied in the mouse. The critical events occur between about 15.5 d postcoitum (p.c.) and 12 d after birth, and were studied by conventional histology and by scanning electron microscopy. At about 15.5 d p.c. the cornea of the eye is clearly visible with the primitive eyelids being represented by protruding ridges of epithelium at its periphery. Over the next 24 h, eyelid development proceeds to the stage when the cornea is completely covered by the fused eyelids. Periderm cells stream in to fill the gap between the developing eyelids. Their proliferative activity is such that they produce a cellular excrescence on the outer surface of the line of fusion of the eyelids. This excrescence had almost disappeared by about 17.5 d p.c. Keratinisation is first evident at this stage on the surface of the eyelids and passes continuously from one eyelid to the other. Evidence of epidermal differentiation is more clearly seen in the newborn, where a distinctive stratum granulosum now occupies about one third of its entire thickness. Within the subjacent dermis, hair follicles are differentiating. By about 5 d after birth, a thick layer of keratin extends without interruption across the junctional region. While a noticeable surface indentation overlies the latter, a similar depression is only seen on the conjunctival surface by about 10 d after birth. Keratinisation is also observed to extend in from the epidermal surface to involve the entire region between the 2 eyelids at about this time.(ABSTRACT TRUNCATED AT 250 WORDS

Distance, multimedia and web delivery in surveying and GIS courses at the University Of Southern Queensland

[Abstract]: The University of Southern Queensland has been involved with the distance education of surveying courses for over 25 years. In recent times, staff of the Surveying and Land Information Discipline, and the University as a whole, have embarked on multimedia enhancement and web delivery of curricula. This paper examines some of the initiatives undertaken to enhance the delivery of educational materials and discusses some of the issues involved in the effective delivery of distance education materials. The significant experience in the delivery of traditional educational materials has proven to be an advantage in the repackaging and enhancement of teaching materials. Delivery of education to off-campus students requires a significant support infrastructure which is often not recognised by new entrants into the flexible delivery arena. Traditional support mechanisms such as phone, fax and standard media (eg. videos, audio tapes etc) are being replaced by email, ‘electronic’ discussion groups, CDs and internet resources. These enhancements, when developed professionally, require a significant commitment of resources and expertise and often require a team approach to their design and development. Access by off-campus students to internet services and affordable software packages also require careful consideration in the design and offering of distance education materials

Plant communities of the upper Murrumbidgee catchment in New South Wales and the Australian Capital Territory

Native vegetation of the upper Murrumbidgee catchment in southeast NSW and the Australian Capital-Territory (ACT) was classified into 75 plant communities across 18 NSW Vegetation Classes within nine Structural-Formations. Plant communities were derived through numerical analysis of 4,106 field survey plots including 3,787-plots from 58 existing survey datasets and 319 new plots, which were sampled in under surveyed ecosystems. All plant-communities are described at a level appropriate for discrimination of threatened ecological communities and distinct-vegetation mapping units. The classification describes plant communities in the context of the upper Murrumbidgee catchment and surrounding-landscapes of similar ecological character. It incorporates and, in some instances, refines identification of plant-communities described in previous classifications of alpine vegetation, forest ecosystems, woodlands and grasslands-across the Australian Alps and South Eastern Highlands within the upper Murrumbidgee catchment. Altitude,-precipitation, soil saturation, lithology, slope, aspect and landscape position were all important factors in guiding-plant community associations. Nine Threatened Ecological Communities under Commonwealth, NSW and ACT legislation occur in the upper-Murrumbidgee catchment. This study has also identified five additional plant communities which are highly restricted-in distribution and may require active management or protection to ensure their survival

An Analysis of the Nature and Impact of Legal Complexities Facing United States Corporations Considering Investment into the New South Africa

Due to sanctions imposed against South Africa’s Apartheid government, the South African economy suffered as little international investment was made in the country. With these sanctions lifted following the democratic elections of 1994, South Africa is now an alluring country for international investment. Despite this attractiveness, U.S. corporations face many legal concerns before entering the South African economy. An analysis of these issues is made in the context of American and South African law with solutions proposed in an effort to avoid deterring foreign investment. These concerns include political and non-economic risks that often hinder investment in the African continent, equal competition and market access for American corporations in South Africa, the adequacy of foreign intellectual property protection in South Africa, and taxes on such investment imposed by both the U.S. and South African governments

Gender and innovation processes in integrated fish agri-food systems in Bangladesh and the Philippines: Insights from the CGIAR Research Program on FISH

This FISH report provides insights on the interactions between gender norms, agency, and innovation in fish agri-food systems

Vulture Poisoning Incidents and the Status of Vultures in Zambia and Malawi

Asia and Africa have experienced recent catastrophic declines in populations of most species of vultures (Thiollay 2006, Ogada et al. 2011, Virani et al. 2011). While the declines in Asia have been linked to poisoning by the veterinary drug diclofenac (Oaks et al. 2004), the reasons for the declines across Africa remain poorly understood (Ogada et al. 2011), and are likely to have multiple causes, such as poisoning and a decline in food supply