Opportunities and threats in the beer-banana value chain in Central Uganda

Poster presented at CIALCA Conference 2011. Kigali (Rwanda). 24-27 Oct 2011

Opportunities for Growing Short-Rotation Woody Crops in Agroforestry Practices

Technologies are readily available for growing hybrid poplars and willows in block plantings as short-rotation woody crops (SRWC) for fuel and fiber. SRWC species and technologies can also be incorporated into agricultural systems as agroforestry practices. Examples are windbreaks, living snowfences, “timberbelts”, riparian buffer strips, and wastewater treatment plantings. Fast growth, convenient propagation (see AF Note - 11), and compatibility with conventional farming methods make SRWC suitable for use in agroforestry practices to provide multiple benefits such as solid wood and wood fiber products, water quality improvement, crop and soil protection, wildlife habitat, and buffers for agricultural/community interfaces

'Hear Israel:' The involvement of Jews in education of the deaf

During the last two centuries there has been a methodological struggle over teaching the deaf. Do deaf people learn to communicate by means of gestures and signs (the "manual method") or is it important for them to learn speech and lip-reading (the "oral method")? In the second half of the nineteenth century, many schools for the deaf made the transition from the manual to the oral method, which the Milan conference of teachers of the deaf decided to promote in 1880. In this conversion, Jews played an important role. Yet there appears to be a clear link between their efforts and Jewish tradition, including its perception of the deaf. © 2008 The Author(s)

Container terminal handling quality

In any service market, the price/quality relationship is of main importance. In the container terminal handling market, quality is important in attracting and retaining customers. Meeting customer needs and delivering high quality for low costs are critical factors for terminals to be successful. Container transport companies are interested in speed and reliability. The time a ship or barge stays in a port must be minimised, and, therefore, the handling of containers must be executed in a fast and reliable way. The operations at the terminal, after the handling of the containers on and off the ship, must be reliable as well. Quantitative information on container terminal quality is hard to obtain. Container terminals are monitoring their quality levels, but the results are not publicly available. Therefore, a literature survey forms the main input for this paper combined with interviews with terminal operators. The aim of this paper is to offer an operational approach for the measurement of the quality of container terminal services. The central research question is; ‘Which are critical performance conditions in terms of quality for container terminals?’ For the container terminal sector in Europe, ‘reliability’ is now the number 1 quality aspect in their transport services (including container terminal handling). Quality levels must meet high standards set by container carriers. Costs, incurred by better quality performance cannot be recovered through higher rates. ‘Reliability’, in terms of meeting container carriers’ demand, is thus a critical performance condition for maritime container terminals. An external performance improvement characteristic might be ‘flexibility’. Deep-sea ship arrivals are no easy planning task, as weather influences and other problematic developments make the terminal operator’s task more difficult. Through strict contracts, all risks of delays and terminal berth congestion are passed onto the terminal operator. This makes ‘flexibility’ a critical performance condition. A critical performance condition for continental terminal operators is a ‘total service’

Import of cytochrome c into mitochondria

The import of cytochrome c into mitochondria can be resolved into a number of discrete steps. Here we report on the covalent attachment of heme to apocytochrome c by the enzyme cytochrome c heme lyase in mitochondria from Neurospora crassa. A new method was developed to measure directly the linkage of heme to apocytochrome c. This method is independent of conformational changes in the protein accompanying heme attachment. Tryptic peptides of [35S]cysteine-labelled apocytochrome c, and of enzymatically formed holocytochrome c, were resolved by reverse-phase HPLC. The cysteine-containing peptide to which heme was attached eluted later than the corresponding peptide from apocytochrome c and could be quantified by counting 35S radioactivity as a measure of holocytochrome c formation. Using this procedure, the covalent attachment of heme to apocytochrome c, which is dependent on the enzyme cytochrome c heme lyase, could be measured. Activity required heme (as hemin) and could be reversibly inhibited by the analogue deuterohemin. Holocytochrome c formation was stimulated 5–10-fold by NADH > NADPH > glutathione and was independent of a potential across the inner mitochondrial membrane. NADH was not required for the binding of apocytochrome c to mitochondria and was not involved in the reduction of the cysteine thiols prior to heme attachment. Holocytochrome c formation was also dependent on a cytosolic factor that was necessary for the heme attaching step of cytochrome c import. The factor was a heat-stable, protease-insensitive, low-molecular-mass component of unknown function. Cytochrome c heme lyase appeared to be a soluble protein located in the mitochondrial intermembrane space and was distinct from the previously identified apocytochrome c binding protein having a similar location. A model is presented in which the covalent attachment of heme by cytochrome c heme lyase also plays an essential role in the import pathway of cytochrome c

Farmers’ awareness and perceived benefits of agro-ecological intensification practices in banana systems in Uganda

Declining soil fertility and pests and diseases are major constraints to banana productivity in smallholder farming systems in Uganda. This study explored farmers’ awareness and perceptions on agro-ecological  intensification (AEI) practices for addressing these constraints in five banana-growing districts in Uganda. Stratified random sampling procedure was used to select 60 households for a survey from different agro-ecological zones and banana production systems. The household survey was complemented with focus group discussions to obtain qualitative data on farmer perceptions on benefits and constraints to AEI application on-farm. Thematic content analysis and descriptive statistics were used to analyze data. Results of the study show that most of the interviewed farmers were aware of the AEI practices although not all those aware had adopted the practices. Farmers were motivated to apply AEI practices perceived to offer multiple benefits: pest and disease management, enhanced productivity, soil fertility improvement and ecological adaptability. Major constraints to application of AEI practices by farmers include insufficient knowledge, labour intensiveness and limited access to markets. A transition towards intensification of smallholder banana systems requires that the full range of ecosystem services provided by AEI practices are recognized and valued by farmers. Therefore, empowering farmers with knowledge on their agro-ecological systems and locally adapting AEI practices is essential for realization of benefits and wider adoption of AEI practices.Keywords: Agro-ecological intensification (AEI), awareness, banana, perceived benefits, smallholder, UgandaAfrican Journal of Biotechnology Vol. 12(29), pp. 4603-461

Synthesis and characterization of Na03RhO206H2O - a semiconductor with a weak ferromagnetic component

We have prepared the oxyhydrate Na03RhO206H2O by extracting Na+ cations from NaRhO2 and intercalating water molecules using an aqueous solution of Na2S2O8. Synchrotron X-ray powder diffraction, thermogravimetric analysis (TGA), and energy-dispersive x-ray analysis (EDX) reveal that a non-stoichiometric Na03(H2O)06 network separates layers of edge-sharing RhO6 octahedra containing Rh3+(4d6, S=0) and Rh4+ (4d5, S=1/2). The resistivities of NaRhO2 and Na03RhO206H2O (T < 300) reveal insulating and semi-conducting behavior with activation gaps of 134 meV and 7.8 meV, respectively. Both Na03RhO206H2O and NaRhO2 show paramagnetism at room temperature, however, the sodium-deficient sample exhibits simultaneously a weak but experimentally reproducible ferromagnetic component. Both samples exhibit a temperature-independent Pauli paramagnetism, for NaRhO2 at T > 50 K and for Na03RhO206H2O at T > 25 K. The relative magnitudes of the temperature-independent magnetic susceptibilities, that of the oxide sample being half that of the oxyhydrate, is consistent with a higher density of thermally accessible electron states at the Fermi level in the hydrated sample. At low temperatures the magnetic moments rise sharply, providing evidence of localized and weakl -ordered electronic spins.Comment: 15 fages 5 figures Solid State Communications in prin

Farmers' awareness and application of banana Xanthomonas wilt control options: The case of Uganda and Kenya

Banana is a key staple and cash crop in east and central Africa. However, the recent outbreak of Banana Xanthomonas wilt (BXW) has threatened farmers whose livelihoods depend on the crop. Since 2002, stakeholders embarked on campaigns to sensitize farmers on the disease and its management. This study evaluated the effectiveness of these efforts by examining farmers' awareness of the disease, control options and their application in Uganda and Kenya. Data on BXW distribution and incidence, farmers' awareness of symptoms, mechanisms of spread and control options of the disease and banana production were collected through household surveys conducted in 2010. The results indicated that most farmers (> 90%) were aware of the disease and its symptoms and more than 50% were aware of the recommended control measures. Farmers obtained information on the disease from multiple sources but farmer-to-farmer interaction was the main source suggesting the key role rural social networks play in managing the disease. Not all affected farmers were able to apply control measures due to cost of intervention, lack of labour and inputs. The study recommends strengthening of linkages among stakeholders for better coordination of efforts and participatory development and promotion of farmer-oriented interventions that address farmer constraints