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agaropectin

agaropectin  

A charged component of agar consisting of a mixture of polysaccharides containing d‐galactose, 3,6‐anhydro‐l‐galactose, and monoesterified sulfuric acid units. Samples from some algae may contain ...
agarophyte

agarophyte  

A seaweed from which agar can be obtained.
agarose

agarose  

A carbohydrate polymer that is a component of agar. It is used in chromatography and electrophoresis.
carrageenan

carrageenan  

A naturally occurring polysaccharide isolated from red algae. The polymer is composed of d-galactose units, many of which are sulphated. K-carrageenan is a gelling agent with uses similar to those of ...
colony

colony  

In bacteriology, a contiguous group of single cells derived from a single ancestor and growing on a solid surface.
culture

culture  

A population of micro-organisms or of the dissociated cells of a tissue grown, for experiment, in a nutrient medium: they multiply by asexual division.
culture medium

culture medium  

A nutrient material, either solid or liquid, used to support the growth and reproduction of microorganisms or to maintain tissue or organ cultures. See also agar.
emulsifying agent

emulsifying agent  

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orany amphiphile or surfactant, such as a phospholipid or a soap, small quantities of which promote the formation of, and stabilize, an emulsion.
Gelidiales

Gelidiales  

(division Rhodophyta)An order of red seaweeds, in which the thallus is filamentous, cylindrical or compressed, and typically is branched. Several species are of economic importance as sources of ...
Gigartinales

Gigartinales  

(division Rhodophyta)An order of red seaweeds, in which the thallus is crustose (Cruoriaceae) or cylindrical, compressed or membranaceous, and branched or unbranched. There are many families and ...
gum

gum  

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A sticky liquid exuded by certain trees and shrubs. Gum has been used as a painting medium since ancient times. It is the normal medium of watercolour (see gum arabic) and pastel.
Haemophilus

Haemophilus  

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n. a genus of Gram-negative aerobic nonmotile parasitic rodlike bacteria frequently found in the respiratory tract. They can grow only in the presence of certain factors in the blood and/or certain ...
hydrocolloid

hydrocolloid  

1. An agar-type gel used in the preparation of solid culture media for micro-organisms.2. A type of impression material which changes from a liquid to a gel-like consistency; the change may be ...
isinglass

isinglass  

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Gelatine prepared from the swim bladder of fish (especially sturgeon). Used commercially to clear wine and beer, and sometimes in jellies and ice cream. Japanese isinglass is agar.
kelp

kelp  

The largest of the seaweeds. The giant kelps of the genus Macrocystis reach lengths of 100 meters and form great forests in shallow oceans. See agar, agarose, Phaeophyta.
pectin

pectin  

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Hemicellulose polymer ingredient of plant tissue, an ingredient in fruits and the agent that causes jelly to set. It is a nonstarchy food ingredient useful in low-carbohydrate diets.
Petri dish

Petri dish  

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A flat shallow circular glass or plastic dish with a pillbox-like lid, used to hold solid agar or gelatin media for culturing bacteria. J. R. Petri (1852–1921), German bacteriologist
plate count

plate count  

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The number of bacterial colonies that grow on a nutrient agar plate under defined conditions. A standard method to estimate bacterial contamination.
Rhodophyta

Rhodophyta  

(red algae)A group of Eukarya which are mostly red in colour; no flagellated cells are formed, and the storage product is a type of starch known as floridean starch. Sexual reproduction tends to be ...
stabilizer

stabilizer  

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1 A substance used to inhibit a chemical reaction, i.e. a negative catalyst.2 A substance used to prevent a colloid from coagulating.

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