The response of the uterine smooth muscle of the rat to histamine and in anaphylactic shock

Dissertation (Ph.D.)--Boston University, 1933. This item was digitized by the Internet Archive

Photocatalytic degradation of 4-chlorophenol by titanium dioxide: role of annealing temperature and morphology

This work investigates the degradation rate of 4-cholorophenol using Titanium dioxide photocatalysts. Chlorophenols and their compounds are a nuisance as they are recalcitrant to degradation in the environment. Three morphologically different Titanium dioxide catalysts, A, B and C, were immobilized on microscopic glass at a layer of 0.5 mg/cm2 and annealed between 500-700°C. The three different TiO2 powders were characterized using Scanning Electron Microscopy, X-Ray Diffraction and Brunauer Emmett Teller to determine their specific surface area, crystalline and particle sizes. A four–position photocatalytic reactor illuminated by two Ultra violet lamps of wavelength range 320-400 nm and intensity I = 27.87 mW/m2 was used to degrade the 4-Chlorophenol in 2 hrs. Aliquots of the degraded 4- chlorophenol were drawn every 30 minutes and analyzed using UV-Vis spectroscopy at λ=226 nm. The optimum annealing temperature of all TiO2 was found to be 650°C, with type B of hexagonal morphological structure and particle size of 28±2nm having the highest 4-chlorophenol degradation rate, of 71.21%.Keywords: Photocatalytic, 4-chlorophenol, annealing, morpholog

Indigenous Museums in Bamenda Grassfields: The Unsung Open-air Museum in Kedjom Keku Fondom.

The history of Intangible Heritage Convention which dates back to the late 19th century involves the intensive collection of old objects the construction of museums the preservation of monuments and the foundation of National Heritage Protection Programs in order to preserve locally rooted culture at all costs Modern museums were described as a colonial legacy in Cameroon This has posed a problem to indigenous museums commonly referred to as openair museum in Kedjom Keku as they remain unsung because of the innovations introduced by the European concept of museology Indigenous museum constitutes of artisanal workshop ecological sites and institutional photos like family album religious institution traditional architecture and monuments Today the paradigm has shifted to mean a building in which objects of historic scientific artistic or cultural interest are stored or exhibited This paper looks at the significance of indigenous museums as veritable tools in preserving Kedjom Keku cultural heritag

ESA - RESGROW: Epansion of the Market for EO Based Information Services in Renewable Energy - Biomass Energy sector

Biomass energy is of growing importance as it is widely recognised, both scientifically and politically, that the increase of atmospheric CO2 has led to an enhanced efficiency of the greenhouse effect and, as such, warrants concern for climate change. It is accepted (IPCC 2011 and just recently in the draft version of the IPCC 2013 report) that climate change is partly induced by humans notably by using fossil fuels. For reducing the use of oil or coal, biomass energy is receiving more and more attention as an additional energy source available regionally in large parts of the world. Effective management of renewable energy resources is critical for the European and the global energy supply system. The future contribution of bioenergy to the energy supply strongly depends on its availability, in other words the biomass potential. Biomass potentials are currently mainly assessed on a national to regional or on a global level, with the bulk biomass potential allocated to the whole country. With certain biomass fractions being of low energy density, transport distances and thus their spatial distribution are crucial economic and ecological factors. For other biomass fractions a super-regional or global market is envisaged. Thus spatial information on biomass potentials is vital for the further expansion of bioenergy use. This study, which is an updated version of a study carried out in 2007 in frame of the ENVISOLAR project, analyses the potential use of Earth Observation data as input for biomass models in order to assessment and manage of the biomass energy resources especially biomass potentials of agricultural and forest areas with high spatial resolution (typical 1km x 1km). In addition to a sorrow review of recent developments in data availability and approaches in comparison to its 2007’ version, this study also includes a review on approaches to directly correlate remote sensing data with biomass estimations. An overview of existing biomass models is given covering models using remote sensing data as input as well as models using only meteorological and/or management data as input. It covers the full life cycle from the planning stage to plant management and operations (Figure 1). Several groups of stakeholders were identified

Modelling and Validating Biomass Potentials over Agricultural and Forest Areas

Using vegetation models to describe the carbon uptake by vegetation, Net Primary Production (NPP) has become an important tool to study the mechanisms of carbon exchange and to quantfy the magnitude of terrestrial carbon sinks and sources. Various vegetation models are driven to simulate the carbon cycle in vegetated areas to estimate the NPP for different regions on regional to national scales. In this study the three models BETHY/DLR, G4M and EPIC are used to compute NPP for agricultural and forest test areas using hgh resolution datasets for the Wienerwald, Harz and Marchfeld regions in Austria and Germany. For the forest test areas, a validation for the G4M model is performed. Underestimations of up to 57% are shown, which are linked with high coefficients of determination (R2 up to 0.75). For the agricultural test area a sensitivity analysis for the EPIC and BETHY/DLR is performed. Here it was demonstrated that variabilities of up to 62% could occur with changing climate conditions

Engaging Students Engaging Industry Engaging Enterprise

A reflective piece on how a small team of students and academics gained more awareness of their own sense of enterprise and creativity. The case study examines the phases and crisis points of the whole event process and identifies some of the key learning outcomes for all involved