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Matière vivante, Bactéries
Les spécimens vivants sont utilisés dans une grande variété d’études, notamment pour observer les effets physiologiques des médicaments sur le rythme cardiaque d’un spécimen, l’effet de la température sur le métabolisme, la locomotion des micro-organismes, ainsi que pour étudier la respiration des plantes, la photosynthèse, la plasmolyse et plus encore. Les cultures d’algues forment des colonies cellulaires très faciles à visualiser, ce qui permet de mieux comprendre les parois cellulaires et les plastes. De nombreux spécimens vivants se reproduisent rapidement, ce qui facilite un enchaînement rapide des tests successifs.
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Ward's® Live Escherichia coli JM101 (Host) Culture
E. coli with JM101 can be transformed with pUC8 plasmid to become resistant to Ampicillin and to metabolize lactose
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Ward's® Live Escherichia coli (non-muccoid) Culture
Used for culturing Dictyostelium discoideum (cellular slime mold).
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Ward's® Live Pseudomonas putida Culture
From soil and water rich in minerals. Organism of putrefaction.
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Ward's® Live Aquaspirillium itersonii Culture
All microbial cultures undergo an extensive quality control program prior to releasing for sale, so they are guaranteed for purity as well as for species.
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Ward's® Bacteria In Food Demonstration
Students determine contamination levels of ground beef in different environments.
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Ward's® Live Aquaspirillium serpens Culture
All microbial cultures undergo an extensive quality control program prior to releasing for sale, so they are guaranteed for purity as well as for species.
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Ward's® Live Streptococcus mutans Culture
Found on dental plaque, implicated in cavities. No Lancefield group shown, gamma hemolysis.
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Ward's® Live Serratia liquefaciens Culture
Colorless, most widely dispersed of the Serratia species.
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Ward's® Live Alcaligenes viscolactis Culture
The presence of A. viscolactis in milk is a common cause for sliminess or "ropiness".