Commuting to the urban tech campus: Tech companies’ and their elite workers’ co-production of South Lake Union, Seattle

This article demonstrates how tech professionals commuting to neighbourhoods redeveloped for their work are contributing to their transformation into urban tech campuses: gentrified districts where landscapes, understandings of place and temporalities are shaped by their praise of innovation, emotional detachment from place, and daily ebb and flow. While also resulting in displacement, othering, and the rewriting of histories and geographies, commuters’ contribution to tech-led gentrification contrasts with the emotional investment into place and the sense of permanence gentrifiers use in established residential neighbourhoods they perceive as authentic and progressively remake in their image. While concomitant, it also differs from residential new-build gentrification, as it reinforces not only middle-class norms but also the economic discourse of the high-tech industry, which co-produces these places as elite worker oases. Using South Lake Union, Seattle, WA as a case study, this article aims to contribute to a social understanding of tech-led gentrification: while recent research has focused on residential gentrifiers and on the macro political and economic forces that transform declining urban areas into so-called innovation districts, this qualitative study explores gentrification through the narratives and uses of public space of an urban tech campus’s dominant population – an elite, predominantly young, white, male commuter workforce several times larger than the local residential population

A quantitative screen for metabolic enzyme structures reveals patterns of assembly across the yeast metabolic network.

Despite the proliferation of proteins that can form filaments or phase-separated condensates, it remains unclear how this behavior is distributed over biological networks. We have found that 60 of the 440 yeast metabolic enzymes robustly form structures, including 10 that assemble within mitochondria. Additionally, the ability to assemble is enriched at branch points on several metabolic pathways. The assembly of enzymes at the first branch point in de novo purine biosynthesis is coordinated, hierarchical, and based on their position within the pathway, while the enzymes at the second branch point are recruited to RNA stress granules. Consistent with distinct classes of structures being deployed at different control points in a pathway, we find that the first enzyme in the pathway, PRPP synthetase, forms evolutionarily conserved filaments that are sequestered in the nucleus in higher eukaryotes. These findings provide a roadmap for identifying additional conserved features of metabolic regulation by condensates/filaments

Contribution to the marine biodiversity inventory: a checklist of the Amphipoda (Crustacea) of the Southern Ocean

A checklist, with synonymical bibliography, of all benthic, supralittoral and pelagic Amphipoda (Gammaridea, Caprellidea and Hyperiidea) occurring in the Southern Ocean is drawn up, mostly from taxonomical literature checked until 31 December 1992. 883 taxa have been recorded: 711 spp. and subspp. of Gammaridea, 28 spp. of Caprellidea, 69 spp. and subspp. of Hyperiidea as well as 75 unidentified spp. (73 Gammaridea, 2 Caprellidea). Distribution in the East or West Antarctic sub-regions, in the Subantarctic Islands sub-region, in the Magellanic sub-region and in the Tristan da Cunha district is mentioned. Bathyal and abyssal benthic occurrence is indicated as well as the general bathymetrical distribution of the pelagic species occurring south of 45°S. The Barnard & Barnard (1983) coded geographic system for reporting distribution of taxa is revised for the Southern Ocean and a new list of geographic codes of general application for Antarctic and Subantarctic benthos is provided. The benthic Amphipod fauna of the Southern Ocean comprises 702 species (85 % endemic) of which 451 are distributed in the Antarctic region (78.4% endemic) and 342 in the Subantarctic region (50.8 % endemic). Endemicity at the genus level attains 36.7 % for the whole Southern Ocean, 26.2% for the Antarctic and 13.5% for the Subantarctic region respectively

Revision of the Antarctic and sub-Antarctic species of the family Stegocephalidae (Crustacea: Amphipoda) with description of two new species

The Antarctic and sub-Antarctic elements of the family Stegocephalidae DANA, 1855 (Crustacea: Amphipoda) are revised, and a key to the species is presented. Two new species are described: Andaniexis ollii n.sp. and Phippsiella watlingi n.sp. The family is represented in the Southern Ocean by 19 species belonging to 11 genera, of which one is reported as new to the area

Summer distribution of marine mammals encountered along transects between South Africa and Antarctica during 2007-2012 in relation to oceanographic features

The at-sea summertime distribution of marine mammals between South Africa and Antarctica was determined along eight transects surveyed between December 2007 and January 2012. During 1930 30-minute transect counts, 1390 marine mammal individuals were attributed to 19 species: eight toothed whales (Odontoceti), six pinnipeds, and five baleen whales (Mysticeti). An additional two toothed-whale species were encountered ‘out of effort’. The four most numerous species accounted for 85% of the total number of individuals encountered: crabeater seal (Lobodon carcinophagus), humpback whale (Megaptera novaeangliae), Antarctic Minke whale (Balaenoptera bonaerensis) and fin whale (B. physalus). The distribution of these species was related to oceanographic features, such as water masses and fronts, pack ice and ice edge: These differences were statistically highly significant. Biodiversity was compared with other polar marine ecosystems

Multiplex sorting of foodborne pathogens by on-chip free-flow magnetophoresis

This study reports multiplex sorting of Salmonella typhimurium and Escherichia coli 0157, from broth cultures and from pathogen-spiked skinned chicken breast enrichment broths by employing microfluidic free-flow magnetophoresis. Magnetic beads of different sizes and magnetite content, namely Dynabeads anti-salmonella and Hyglos-Streptavidin beads together with the corresponding pathogen-specific biotinylated recombinant phages, were utilised as affinity solid phases for the capture and concentration of viable S. typhimurium and E. coli 0157. Following optimisation, the protocol was used to demonstrate continuous magnetophoretic sorting of the two pathogen-bound magnetic bead populations from mixed cultures and from pathogen-spiked chicken pre-enrichment broths under the influence of a Halbach magnet array. For example, in the la tter case, a pure population of S. typhimurium-bound Dynabeads (72% recovery) was sorted from a 100 μL mixture containing E. coli 0157-bound Hyglos beads (67% recovery) within 1.2 min in the presence of 0.1% Tween 20. This proof-of-principle study demonstrates how more than one pathogen type can be simultaneously isolated/enriched from a single food pre-enrichment broth (e.g. Universal food enrichment broth)

Belgian Antarctic Expeditions: bibliography

This bibliography is based upon earlier working documents by T. Van Autenboer and P. Doyen. It was completed with data contained in an internal report on marine biology by C. de Broyer (1982). The compilers at tempt to present a list as complete as possible of the scientific papers and data reports related to Belgian Antarctic Research starting with the I.G.Y. A selection of articles of general interest or of narrative value is included