PlanBude Hamburg. Kollektives Wissen als Grundlage von Stadtgestaltung

Viele stadtplanerische Beteiligungsverfahren hatten in der jüngeren Vergangenheit überwiegend informativen oder konsultierenden Charakter, selten waren Prozesse darauf ausgelegt, weitere Stufen der „ladder of participation“ (Arnstein 1969) zu nehmen. Zunehmend wird aber im hegemonialen Planungsverständnis ein neues Paradigma partizipatorischer Verfahren wirksam; komplexe Aufgaben der Stadtgesellschaft sollen in kooperativen Beteiligungsverfahren die heterogenen, zuweilen auch diametralen Interessenslagen unterschiedlicher Akteure austarieren und zu konstruktiven, von allen Seiten akzeptierten Ergebnissen führen (vgl. Stuttgart 21, Tempelhofer Feld, Ausbau Flughafen Frankfurt). Dass dieses neue Leitbild partizipatorischer Verfahren nicht nur für alle konfliktbehafteten Stadtplanungsvorhaben strapaziert wird, sondern tatsächlich auch durch einen kollektiven Prozess eine Stadt der Vielen ermöglichen kann, soll in diesem Beitrag am Beispiel der PlanBude, einem in der Konstellation der Akteure und der Größenordnung des Bauvorhabens in Hamburg singulären Projekt, dargestellt werden

Genome sequencing and analysis of the versatile cell factory Aspergillus niger CBS 513.88

The filamentous fungus Aspergillus niger is widely exploited by the fermentation industry for the production of enzymes and organic acids, particularly citric acid. We sequenced the 33.9-megabase genome of A. niger CBS 513.88, the ancestor of currently used enzyme production strains. A high level of synteny was observed with other aspergilli sequenced. Strong function predictions were made for 6,506 of the 14,165 open reading frames identified. A detailed description of the components of the protein secretion pathway was made and striking differences in the hydrolytic enzyme spectra of aspergilli were observed. A reconstructed metabolic network comprising 1,069 unique reactions illustrates the versatile metabolism of A. niger. Noteworthy is the large number of major facilitator superfamily transporters and fungal zinc binuclear cluster transcription factors, and the presence of putative gene clusters for fumonisin and ochratoxin A synthesis

Approaching the low-temperature limit in nucleation and two-dimensional growth of fcc (100) metal films Ag/Ag(100)

We analyze the formation of two-dimensional Ag islands following deposition of about 0.1 ML of Ag on Ag(100) over a temperature regime ranging from classical nucleation and growth behavior to almost immobile adatoms, from 300 to 125 K. Particular emphasis is placed on the post-deposition dynamics at the lower end of the temperature range, where the saturation island density is not reached at the end of the deposition, and nucleation and aggregation processes continue with adatoms from the remaining adatom gas. Our analysis combines VT scanning tunneling microscopy experiments with kinetic Monte Carlo simulation of appropriate atomistic models. The only adjustable parameters in the model are the terrace diffusion barrier and prefactor, which can be determined from island density behavior near room temperature. Other processes such as rapid edge diffusion, and “easy” nucleation and aggregation of diagonally adjacent adatoms, are treated as instantaneous. The model excellently reproduces all aspects of behavior at low temperatures, demonstrating that nucleation and growth processes can be described in one consistent scheme, down to the regime of almost immobile adatoms.This article is from Physical Review B 66, no. 15 (2002): 155435, doi:10.1103/PhysRevB.66.155435.</p

Genome sequencing and analysis of the versatile cell factory Aspergillus niger CBS 513.88

The filamentous fungus Aspergillus niger is widely exploited by the fermentation industry for the production of enzymes and organic acids, particularly citric acid. We sequenced the 33.9-megabase genome of A. niger CBS 513.88, the ancestor of currently used enzyme production strains. A high level of synteny was observed with other aspergilli sequenced. Strong function predictions were made for 6,506 of the 14,165 open reading frames identified. A detailed description of the components of the protein secretion pathway was made and striking differences in the hydrolytic enzyme spectra of aspergilli were observed. A reconstructed metabolic network comprising 1,069 unique reactions illustrates the versatile metabolism of A. niger. Noteworthy is the large number of major facilitator superfamily transporters and fungal zinc binuclear cluster transcription factors, and the presence of putative gene clusters for fumonisin and ochratoxin A synthesis