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The Performance of Seaport Clusters; A Framework to Analyze Cluster Performance and an Application to the Seaport Clusters of Durban, Rotterdam and the Lower Mississippi
- P. Langen
- 22 January 2004
This PhD thesis deals with the performance of clusters. Even though cluster studies are numerous, a coherent framework to analyze cluster performance is lacking. In this thesis, such a framework is… Expand
New indicators to measure port performance
Throughput volume is the most widely used performance indicators in the port industry, but does not provide information on the (regional) economic impact of the port and the attractiveness of the… Expand
Cytostatic effects of various alkyl phospholipid analogues on different cells in vitro.
- P. Langen, H. R. Maurer, H. Brachwitz, K. Eckert, A. Veit, C. Vollgraf
- Biology, Medicine
- Anticancer research
- 1 November 1992
Phospholipid analogues were studied with regard to their cytostatic activity on different tumour cell lines and on murine bone marrow cells. Compounds compared for their activity were alkylglycero-… Expand
Business models and network design in hinterland transport
International container transport is the backbone of global supply chains. Hinterland transport, the transport from the port to the final destination and vice versa, is an important component of… Expand
Intermodal connectivity as a port performance indicator
The measurement of port performance is relevant for port users, policy makers, port developers and other stakeholders. This paper describes the development of one port performance indicator:… Expand
[Experiments on polyphosphate overcompensation in yeast cells after phosphate deficiency].
3'-Deoxy-3'-fluorothymidine, a new selective inhibitor of DNA-synthesis.
Specific neutralizing antiserum against a polypeptide growth inhibitor for mammary cells purified from bovine mammary gland.
- F. Boehmer, W. Lehmann, F. Noll, R. Samtleben, P. Langen, R. Grosse
- Biology, Medicine
- Biochimica et biophysica acta
- 30 July 1985
A recently published method for purification of a new inhibitor of growth of mammary cells in vitro from bovine mammary gland has been modified to yield several hundred micrograms of inhibitor per kg… Expand
Alteration of DNA topoisomerase II activity during infection of H9 cells by human immunodeficiency virus type 1 in vitro: a target for potential therapeutic agents.
Infection of H9 cells with human immunodeficiency virus type 1 (HIV-1) was found to decrease the phosphorylation of DNA topoisomerase II during the initial phase of infection. Simultaneously, with a… Expand
Synthesis and antiproliferative potency of 9-beta-D-arabinofuranosyl-2-fluoroadenine phospholipid adducts.
- H. Brachwitz, J. Bergmann, Y. Thomas, T. Wollny, P. Langen
- Chemistry, Medicine
- Bioorganic & medicinal chemistry
- 1 June 1999
Three novel alkylphospholipid and four novel O-alkylglycerophospholipid derivatives of fludarabine (F-ara-AMP), known as a drug for the clinical treatment of chronic lymphocytic leukemia, were… Expand