Monera
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LivingMaterials
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Ward’sWinogradskyColumnKit
Re-createExperimentInvestigating
MicrobialGrowthinSoil
Inthe late1800s,RussianscientistSergeiN.Winogradsky inventedaunique
apparatusforobservingmicrobialsuccession—thegrowthofmicroscopic
organisms insoil.Nowyoucanperformthesameexperiment,aswellasavari-
etyofothers,withourWinogradskyColumnKit.Simplyfillbothtubeswithsoil
samplesandwater,andobservethedevelopmentofdifferenttypesoforgan-
ismsoveranextendedperiodoftime.Comparetheirgrowth insoilvs.soilwith
nutrientsadded,aerobicvs.anaerobicenvironments,cleanvs.pollutedenviron-
ments,andmuchmore.Youcanalsostudydifferentsoilsamplesyoucollect,the
sulfurcycle,orevenprotists. Itcomeswithcalciumsulfate,calciumcarbonate,
twocolumnswithstoppers,and instructionswithsuggestedexperiments.
$14.75
Ward’sBacteriainFoodKit
DetermineContaminationLevelsof
GroundBeefinDifferentEnvironments
Weareoftencautionedtocarefullyprepareandstoreourfood inordertoavoidbacterialcontamina-
tion.Nowstudentscanstudytheeffectsof improperlystoredfoodwithour labactivityandground
beefyouprovide.Theserialdilutionsstudentsperformwilldeterminethebacterialtiter(levelofcon-
tamination) infrozen,refrigerated,androom-temperaturebeef. It includes instructionsandmaterials
forone labgroupordemonstration.
$66.95
MicrobialGrowthMeasurementSystem
DetermineaGrowthCurveWithoutCountingCells
Don’tbotherwithtediousdilutionplatingorexpensive light-scattering
equipmenttofindouttherateofmicrobialgrowth inyourbacterial,fungal,
orprotistculture.Simplyaffixan Insta-Rate
®
density indicatorstriptoaculture
tubeandobservethetubedaily.Thedensity isdeterminedbywhichshaded
barcanno longerbeclearlyseen. Indicator isautoclavable.You’llreceive
instructionsandarollof25strips.
$27.50
GrowthRates
