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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® Bacteria In Food Demonstration
Students determine contamination levels of ground beef in different environments.
Développer 1 article
Ward's® Live Alcaligenes faecalis Culture
A Common Intestinal Flora Isolate, Demonstrates Alpha Hemolysis on Blood Agar Growth Medium
Développer 2 article
Ward's® Live Streptomyces albus Culture
Isolated from straw, can also be found in the soil, and acts as a decomposer. Slight anti-bacterial activity. With coenocytic hyphae
Développer 1 article
Ward's® Merismopedia
Freshwater. Colonial. Sheet of many cells one cell thick. Soil-water medium.
Shipped in a form that provides the best quality specimen. Most are supplied in 16 x 125 mm tubes, 2 oz. jars, or 8 oz. jars.
Développer 2 article
Ward's® Kocuria rosea
This organism is commonly isolated from soil or water, and produces a pink or rose colored pigment.
Développer 2 article
Ward's® Moraxella catarrhalis
Normal flora of respiratory tract. Beta-lactamase positive. Also known by the name Branhamella catarrhalis
Développer 1 article
Ward's® Hemolysis Set
Hemolysis, the rupture of red blood cells, is induced by certain species of streptococcal bacteria that produce extracellular hemolysin. Observe this phenomenon with this set of 3 non-pathogenic species
Développer 1 article
Ward's® Student Bacterial Culture Kit
Everything you need to safetly collect and culture bacteria and fungi from your environment
Développer 1 article
Ward's® Live Oscillatoria Culture
Oscillatoria is a genus of filamentous green algae that moves by sliding filaments back and forth against each other.