Changing microspatial patterns of sulfate-reducing microorganisms (SRM) during cycling of marine stromatolite mats.

Microspatial arrangements of sulfate-reducing microorganisms (SRM) in surface microbial mats (~1.5 mm) forming open marine stromatolites were investigated. Previous research revealed three different mat types associated with these stromatolites, each with a unique petrographic signature.

Electronic Health Care Records in Europe: confidentiality issues from an American perspective.

The confidentiality and security issues related to the European Electronic Health Care Records have been approached in the United States as well. This paper synthesizes several solutions and comments on these issues from the legal viewpoint in the United States, as well as some preoccupations of the academic world to improve and standardize the quality of the security and confidentiality of data from studies involving human subjects.

Reconstruction and computation of microscale biovolumes using geographical information systems: potential difficulties.

Biofilms are bacterial colonies enveloped in a matrix of extracellular polymeric secretions. Confocal scanning laser microscopy has been used in conjunction with different image analysis techniques to investigate the structure of biofilms. A major goal is to reconstitute the three-dimensional structure of biofilms, and compute or estimate the biovolumes.

Using geographical information techniques to quantify the spatial structure of endolithic boring processes within sediment grains of marine stromatolites.

Marine stromatolites are generated through the interactions of environmental parameters and specific microbial processes. The activities of endolithic bacteria, that bore canals through calcium carbonate (CaCO(3)) sand grains (ooids) and reprecipitate the CaCO(3) as a single layer (i.e.