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OK OK OK TOKEY
CRABPRESERVATION
GRAPH HAI YHA
๏ต Keep on it
CRABPRESERVATION
โšซFirstdocumentedbyBoyle(1663).
โšซFirstconceptofspermpreservationby
Lazzarospallanzini(1760).
โšซ Most significantdiscoverywastheuseof
glycerolascryoprotectant byPolgeand
smith(1949)
PRINCIPLE
1. FREEZING
2. STORING
3. THAWING
CONT
..
โšซ Theabilityofglycerol toprotectcellsfromfreezing
injurywasdiscoveredaccidentally
.
โšซ Thesubsequentdevelopmentof
CRABPRESERVATION techniqueshashad ahuge
impactinmanyfields, mostnotablyin
reproductivemedicine.
โšซ OK Lets do it
โšซ
โšซ Freezing injuryhasbeenshownto havetwo
components,direct damage fromtheicecrystals
andsecondarydamage causedbytheincreasein
concentrationofsolutesasprogressivelymoreiceis
formed.
โšซ Intracellularfreezingisgenerallylethalbutcanbe
avoided bysufficientlyslow cooling, and under
usualconditionssolutedamagedominates.
BAS CHAL RHA H
TUSSI BATAO

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