PubMed · 47053
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1975-03-08. Letter: Syncope after a cold drink.. https://pubmed.ncbi.nlm.nih.gov/47053/
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Continuous culture is applied mainly as a research tool and much less as a production process. Fundamental bottlenecks in continuous culture are discussed to help shed light on this apparent contradiction. Based on a discussion of technical, process related, and economic/market bottlenecks it is concluded that the often mentioned productivity argument in favor of continuous processing is much too simple. The optimal choice of a process mode is determined by a full understanding of the equipment and production plant factors and of the economic/market factors. Very often the resulting choice will be the fed batch and/or the cell retention process mode which is characterized by low growth rates. Therefore more research towards product formation at low growth rates (less than 0.05 h-1) is needed.
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Two estrogenic substances of plant origin have been identified in beer using gas chromatography/mass spectrometry. These phytoestrogens, daidzein and genistein, have previously been shown to be biologically active in animals. Confirming the presence of biologically active phytoestrogens in beer and their possible presence in other beverages, suggests that there may be clinically significant effects related to sustained exposure to phytoestrogens contained in alcoholic beverages.