No. 11: The State of Food Insecurity in Cape Town

Cape Town is one of the wealthiest cities in the Southern African region. Yet, the vast majority of households in poor areas of the city experience food insecurity. This paper uses AFSUN data to examine the characteristics and drivers of food insecurity in Cape Town. While food insecurity correlates closely with income poverty and household structure, broader factors also impact upon urban food security, most notably urban design and market structure. Efforts to address urban food insecurity should therefore not simply target the household. Instead, a food systems approach is necessary, which considers supply chains, procurement, nutrition support programmes, public health, environmental sustainability, water and waste, the support of local enterprise and so on. Furthermore, this approach must consider the geography of the urban food system, in particular planning and zoning regulations regarding the location of both formal and informal food retail within low-income areas of the city

(S)norlaudanosoline synthase. the first enzyme in the benzylisoquinoline biosynthetic pathway

1. introduction Isoquinoline alkaloids form the largest group of alkaloids in the plant kingdom. Numerous publications deal with aspects of the biosynthesis of these compounds in vivo [ 11, while isoquinoline biosynthesis at the cell-free level had hardly been touched [Z]. The initial reaction in isoquinoline biosynthesis has long [3] been assumed to be a condensation of two aromatic units, both derived from tyrosine, namely dopamine and 3,4-d~ydroxyphenylacet~dehyde [4]. This scheme was later modified [5] where it was reported that condensation of dopamine with 3,4-dihydroxyphenylpyruvate would lead to an amino acid, norlaudanosoline-l-carboxylic acid, which in turn, by decarboxylation, would yield norlaudanosoline

The Lifetimes of Phases in High-Mass Star-Forming Regions

High-mass stars form within star clusters from dense, molecular regions, but is the process of cluster formation slow and hydrostatic or quick and dynamic? We link the physical properties of high-mass star-forming regions with their evolutionary stage in a systematic way, using Herschel and Spitzer data. In order to produce a robust estimate of the relative lifetimes of these regions, we compare the fraction of dense, molecular regions above a column density associated with high-mass star formation, N(H2) > 0.4-2.5 x 10^22 cm^-2, in the 'starless (no signature of stars > 10 Msun forming) and star-forming phases in a 2x2 degree region of the Galactic Plane centered at l=30deg. Of regions capable of forming high-mass stars on ~1 pc scales, the starless (or embedded beyond detection) phase occupies about 60-70% of the dense, molecular region lifetime and the star-forming phase occupies about 30-40%. These relative lifetimes are robust over a wide range of thresholds. We outline a method by which relative lifetimes can be anchored to absolute lifetimes from large-scale surveys of methanol masers and UCHII regions. A simplistic application of this method estimates the absolute lifetimes of the starless phase to be 0.2-1.7 Myr (about 0.6-4.1 fiducial cloud free-fall times) and the star-forming phase to be 0.1-0.7 Myr (about 0.4-2.4 free-fall times), but these are highly uncertain. This work uniquely investigates the star-forming nature of high-column density gas pixel-by-pixel and our results demonstrate that the majority of high-column density gas is in a starless or embedded phase.Comment: 10 pages, accepted to Ap

No. 05: Mapping the Informal Food Economy in Cape Town, South Africa

The informal food retail sector is an important component of urban food systems and plays a vital role in ensuring access to food by the urban poor. Yet, policy frameworks both to address food security and to govern the informal sector neglect informal retail in the food system and, as a result, the sector is poorly understood. This discussion paper argues that it is essential to understand the dynamics of the informal food retail sector, which is diverse in terms of products traded as well as the business models utilized. The paper attempts to identify the characteristics of the sector that impact on its ability to address the food needs of the neighbourhoods in which the businesses are located. It illustrates that far from existing independently of each other, the informal and the formal food retail sectors intersect at various points upstream as well as through customer practices. The paper argues that it is essential to view the formal and informal sectors as part of the same food system and to generate policy and planning responses that acknowledge the role of both in meeting local food security needs. Although the paper is focused on Cape Town, South Africa, the findings are of broader relevance

No. 24: Mapping the Invisible: The Informal Food Economy of Cape Town, South Africa

The informal food retail sector, which is diverse in terms of products traded as well as business models utilized, is an important component of urban food systems and plays a vital role in ensuring access to food by the urban poor. Yet, policy frameworks both to address food security and to govern the informal sector neglect informal retail in the food system and, as a result, the sector is poorly understood. This report attempts to identify the characteristics of the sector that impact on its ability to address the food needs of the neighbourhoods in which the businesses are located. The findings illustrate that far from existing independently of each other, the informal and the formal food retail sectors intersect at various points upstream as well as through customer practices. It is therefore essential to view the formal and informal food sectors as part of the same food system and to generate policy and planning responses that acknowledge the role of both in meeting local food security needs. If South Africa’s constitutional right to food is to be achieved, it will be necessary to develop a multi-departmental food system and food security strategy that champions and facilitates the progressive realization of the right of all residents to access sufficient, nutritious, safe and culturally appropriate food. Although the research in this report is focused on Cape Town, South Africa, the findings are of broader relevance