A Place in the World: A Review of the Global Debate on Tenure Security

Draws upon more than 50 years of academic debate and the evolution of four distinct traditions of land tenure analysis to review the issue of property rights and the creation of sustainable community livelihoods

Trends in Higher Education Affecting the College and University Library

published or submitted for publicatio

Buchi Emecheta : A Novelist\u27s Image of Nigerian Women

Nigerian novelist Buchi Emecheta writes about the lives of twentieth century Nigerian women. Living during the post-World War II decades of British colonialism, and the subsequent move towards Nigerian Independence in the 1950s, Emecheta\u27s women are affected by some of the most dramatic social and cultural changes in their country\u27s history. Colonialism brings with it abrupt changes in the degree of political power held by Nigerians in their own country, and fosters the urbanization and expansion of market centers like Lagos, based on exploitative systems of raw material extraction for the colonial power. Imposing an increasingly western sensibility on Nigeria, the British occupation also brings different codes of ethics and morality to Nigeria, greatly challenging indigenous modes of existence

Deeper Roots: Strengthening Community Tenure Security and Community Livelihoods

Utilizes concrete experiences from Bolivia, Colombia, Brazil, South Africa, Tanzania, India, Nepal, Indonesia, and the Philippines to highlight emerging issues, and offers strategies for advancing community forest tenure security

Milking Sane Safe Sanitary

PDF pages: 1

Investigations on the synthesis of nucleic acids by isolated nuclei

Imperial Users onl

Rheological Properties of Polystyrene/Polypropylene (PS/PP) Blends: The Effects of Various Compatibilizers

Studies on rheological properties of polystyrene/polypropylene (PS/PP) blends with and without the addition of various compatibilizers were carried out. PS/PP blends of 20/80, 50/50 and 80/20 (wt%) were prepared through melt blending in a single screw extruder at a screw speed of 40 rpm and temperature of 200 oC. The rheologycal properties were evaluated by melt flow indexer machine with the temperature of 200 oC. Four types of compatibilizers viz. polystyrene-block-poly (ethylene-butylene)-block-polystyrene (SEBS), surlyn, ethylene vinyl acetate (EVA) and sodium salt hydrate of 4 styrenesulfonic acid (ssh-4-ssh) were used in this study. The concentration of the compatibilizer is 7.5wt%.Results show for uncompatibilized blend, all blend compositions exhibit a reduction in melt viscosity, but the incorporation of EVA, surlyn and SEBS produced more resistance system to flow and increased the melt viscosity. However, in the presence of ssh-4-ssa a reduction in melt viscosity was observed, indicating easier for blend to flow

Coralline algal Mg-O bond strength as a marine <i>p</i>CO₂ proxy

Past ocean acidification recorded in the geological record facilitates the understanding of rates and influences of contemporary &lt;i&gt;p&lt;/i&gt;CO&lt;sub&gt;2&lt;/sub&gt; enrichment. Most pH reconstructions are made using boron, however there is some uncertainty associated with vital effects and isotopic fractionation. Here we present a new structural proxy for carbonate chemistry; Mg-O bond strength in coralline algae. Coralline algae were incubated in control (380 μatm &lt;i&gt;p&lt;/i&gt;CO&lt;sub&gt;2&lt;/sub&gt;), moderate (750 μatm&lt;i&gt;p&lt;/i&gt;CO&lt;sub&gt;2&lt;/sub&gt;), and high (1000 μatm &lt;i&gt;p&lt;/i&gt;CO&lt;sub&gt;2&lt;/sub&gt;) acidification conditions for 24 months. Raman spectroscopy was used to determine skeletal Mg-O bond strength. There was a positive linear relationship between &lt;i&gt;p&lt;/i&gt;CO&lt;sub&gt;2&lt;/sub&gt; concentration and bond strength mediated by positional disorder in the calcite lattice when accounting for seasonal temperature. The structural preservation of the carbonate chemistry system in coralline algal high-Mg calcite represents an alternative approach to reconstructing marine carbonate chemistry. Significantly, it also provides an important mechanism for reconstructing historic atmospheric CO&lt;sub&gt;2&lt;/sub&gt; concentrations