SECTION THREE 



Bodman (i960) uses Laktoseal in conjunction with Aquamount 

 for preparing permanent preparations of starch gels in electro- 

 phoresis. 



MACCONAILL'S GLUCOSE SYRUP 



This may be used in certain cases as an aqueous mountant in 

 general histology. It is an extremely useful product with many 

 applications. 



MacConaill's glucose syrup is recommended for clearing and 

 mounting, without previous dehydration, certain tissues and 

 tissue sections, museum specimens, etc. Clearing of sections takes 

 about one minute; slices of tissue are cleared from half an hour 

 to several hours, depending on their thickness; while a four- 

 month foetus usually takes about ten to twelve hours. The syrup 

 acts as a preservative against bacterial and fungal destruction of 

 tissue. Tissues immersed in the syrup rapidly become hard; they 

 can be taken out, drained of the surplus syrup, and then preserved 

 in the candied state; when required, tissues preserved in this way 

 can simply be immersed again in the clearing syrup. If desired, 

 these syrup preparations can be softened in water, then cut up, 

 when and as required, and recleared. 



Reference: MacConaill, M. A. (1937). 



OPTOIL 



(Edward Gurr) 



Refractive index i"5i5 



Optoil is a clear, colourless, odourless, synthetic immersion oil, 

 which is non-sticky, and non-drying. This oil, which is xylol 

 miscible, is particularly suitable for prolonged observations, as it 

 does not thicken or dry even when left on slides for several months. 

 Although, unlike Cedronol A and B, and possibly other cedarwood 

 oils for immersion, Optoil is unsuitable as a mountant for Gram- 

 stained preparations; as an immersion oil it is preferred by many 

 workers to thickened cedarwood oils, all of which possess the dis- 

 advantage of drying out and becoming too thick on prolonged 

 exposure to the atmosphere. 



531 



