.»
sFREEZ&DRYŒG
_
…
,
,
_
,
.
t
'
-
1—‘_;
ï—
;
:ϰ°ï‘ÿ°f“‘g.
,
‘
'
,
E .22.
:
.
“
,
»
-7
.
-
_
;
(a) ‘ w_
…Ï
iA
__
_
,
,
plot obtained on cooling a water salt, e.g. sodium chloride, mixture. The
portionofthe curve
represents the metastable
state
‘rtfis the plateau
obtained
1f10e1s seeded
0 °C
during thereWärhg of the ffozen solution, Th1s plateau çorresponds
to
the‘latent heat of fusion as the water crystälses ‘out of solution;”ùw’_ Corresp'0nds to the
freezig of
represents the
"
,
.,
of heat at X as the superœoled liquid 'sùddenly freezes;
’
behberaü° °hœtat
the«—fræzÿmgpf,_water ,an@ salt, eut@cü,ç ;espectively.
,
.
c
(a) with (b) and gives the di”erenüalïcerperature obtained
eutectic
d; Aresrstance plot
resÏStànee shows
all] the eütectic
is&1ffôzez
..
“etsîglucose;1 .a=fsùerosegi1aotosœ polyvüipyrrodone;
theîappcaüon
‘
to date has been WithV1rusesandbacænaWh11stthemed1um î‘ii
suspended is not so important as regards the majority of viruses, it is the most important
the
ræistäuœ—bf
pro—*
tecüves
bovmealbumm,peptone,sod1umglutamate,dextran, polyvmylpyrrohdone
Précédent

- 12/249

Suivant