Concept

Purple bacteria

Related publications (110)

Compositional Heterogeneity Reflects Partial Dehydration in Three-dimensional Crystals of Bacteriorhodopsin

Majed Chergui, Erwin Portuondo Campa, Goran Zgrablic, Stefan Haacke, Selma Schenkl

Absorption, fluorescence and excitation spectra of three-dimensional bacteriorhodopsin crystals harvested from a lipidic cubic phase are presented. The combination of the spectroscopic expts. performed at room temp., controlled pH and full external hydrati ...

2003

Extreme S-34 depletions in ZnS at the Mike gold deposit, Carlin Trend, Nevada: Evidence for bacteriogenic supergene sphalerite

Anders Meibom

We identified submicrometer-sized framboidal sphalerite (ZnS) below the base of supergene oxidation in a Carlin-type gold deposit of Eocene age in Nevada, United States, where the framboidal sphalerite forms a blanket-like body containing >400,000 metric t ...

2003

Differential expression of iron-, carbon-, and oxygen-responsive mycobacterial genes in the lungs of chronically infected mice and tuberculosis patients

John McKinney

Pathogenetic processes that facilitate the entry, replication, and persistence of Mycobacterium tuberculosis (MTB) in the mammalian host likely include the regulated expression of specific sets of genes at different stages of infection. Identification of g ...

2003

Photocatalytical inactivation of E. coli: effect of (continuous-intermittent) light intensity and of (suspended-fixed) TiO2 concentration

César Pulgarin

A detrimental effect on the survival of bacteria Escherichia coli KI2 was observed after photocatalytic exposure. The reactions have been carried out in a batch photoreactor using mainly titanium dioxide (TiO2) P-25 Degussa as a catalyst. Illumination was ...

2003

Selective growth of mucolytic bacteria including Clostridium perfringens in a neonatal piglet model of total parenteral nutrition

Bart Deplancke

BACKGROUND: Compromised barrier function and intestinal inflammation are common complications of total parenteral nutrition (TPN). OBJECTIVE: We tested the hypothesis that the lack of enteral nutrients in TPN might select commensal or pathogenic bacteria t ...

2002

The Occurrence of Non-Gaussian Spectral Line Shapes of Molecules in Electrostatically Disordered Media

Majed Chergui, Frank van Mourik

We calc. the effects of relatively strong elec. fields, corresponding to typical values for the fields inside glasses and proteins, on the spectroscopic properties of a simple two-level mol. Disorder in the elec. field strength is employed as a phys. sourc ...

2001

Are the light-harvesting I complexes from Rhodospirillum rubrum arranged around the reaction center in a square geometry?

Horst Vogel, Henning Paul-Julius Stahlberg, Jacques Dubochet

The basic photosynthetic unit contg. the reaction center and the light-harvesting I complex (RC-LHI) of the purple non-sulfur bacterium Rhodospirillum rubrum was purified and reconstituted into two-dimensional (2D) membrane crystals. Transmission electron ...

1998

The reaction center of the photounit of Rhodospirillum rubrum is anchored to the light-harvesting complex with four-fold rotational disorder

Horst Vogel, Henning Paul-Julius Stahlberg, Jacques Dubochet

The minimal photounit of the photosynthetic membranes of the purple non-sulfur bacterium Rhodospirillum rubrum, comprising the reaction center and the light-harvesting complex has been purified and crystd. in two dimensions in the presence of added phospho ...

1998

Continuous production of lactic acid from whey permeate by Lactobacillus helveticus in two chemostats in series

Urs von Stockar

The effect of diln. rate on the prodn. of lactic acid from whey permeate by L. helveticus was investigated. In the 1st chemostat of a 2-stage system, total conversion (98.1%) and max. lactic acid concn. (43.7 g/L) were obtained at a diln. rate (D1tot) of 0 ...

1990

The secondary structure of bacteriorhodopsin determined by Raman and circular dichroism spectroscopy

Horst Vogel

The secondary structure of bacterio-opsin (BO), the retinal free protein-component of bacteriorhodopsin (BR), was detd. by Raman spectroscopy. Addnl. CD measurements revealed only negligible conformational differences between BO in apomembranes and BR in p ...

1987

Graph Chatbot

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.