Microorganisms cultures

The bacterial strains were submitted to the National Collection of Microorganism Cultures of the Pasteur Institute (CNCM) and included R. erythropolis CNCM 1-2204, -2205, -2207, and -2208, and/or R. rhodnii 1-2206. The activity of the microorganisms includes a selective attack on the carbon-sulfur bonds in the organic molecules without significant alteration of the carbon atom structure. As usual, strains were isolated and subjected to successive enrichment phases, in media containing various sources of carbon and DBT as the only sulfur source, then a purification of the enhanced culture led to the fifteen DBT specific strains. From those strains, a subset of ten strains was selected... 

C. Microorganism Culture Experiments to Demonstrate Methylation of Germanium... 

To cultivate microorganisms, culture medium has to be prepared in one of the commonly employed culture vessels a test tube, a flask, a Petri dish, or a fermenter. There are two main types of culture media natural (or empirical, or complex) and synthetic (or chemically defined) media. They vary widely in form and composition, depending on the species of organism to be cultivated and the purpose of the cultivation. 

Because the specific microorganism cultured is the most critical factor in any antibiotic process, strain identification, including morphologic, cultural, and biochemical characteristics should be performed. The source of the microbial isolate (e.g., soil, air, water), as well as any genetic engineering or mutation procedures should be documented. Microbial deposition should be reported (e.g., American Type Culture Collection or Type Culture Collection of the U.S. Department of Agriculture). 

Different types of water, fermentation gases, headspace over microorganism cultures... 

FLEX 1 All foods and water, excepted worn water Enumeration of microorganisms Culture... 

Chemically solubilized active principles render possible the preparation of parenteral, and especially intravenous forms appreciated in the clinical practice. But even at the preclinical level, the use of water-soluble molecules is recommended as they are effectively much easier to study by in vitro tests, in cell or microorganism cultures and on isolated organs. The inconveniences are that chemically modified sfructures may show modified pharmacological, pharmacokinetic and toxicological properties. 

The dependence of the expression of secondary metabolites on external parameters in microorganism cultures is well known in the fermentation industry. The rationale behind this phenomenon has, however, apparently not been recognized resulting in empirical "trial and error" approaches to optimization of yield in production cultures (see Section 7.2). In these cases it should be borne in mind that the physical and chemical parameters are as a rule far removed from the natural conditions, and in this way the systems are artificial and not necessarily primarily governed by the Darwinian laws. 

IMS Results for TMA and Total Amines and the Microorganism Culture Count for Samples of Ground Chicken When Fresh and after 1, 2, and 4 Days at Room Temperature... 

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