Unfortunately, Drs Horrow and colleagues are mistaken. Their regression analysis addresses only the average value for the common duct diameter as a function of age, while the other authors are discussing something elseâthe upper limit of normal value.
POLYFOAM Polyurethane(PUR)/Polyisocyanurate(PIR) is one of the most effective insulation materials commonly available today. It is also extremely versatile and can be used just about anywhere.It helps to keep our buildings cool and our food chilled, it is usually hidden, but you can find it everywhere from sports stadium to hospitals, cold stores to houses. Fire performance-POLYFOAM PUR/PIR is usually used at lower thicknesses than other insulants, so that their heat or fuel contribution to a fire is low compared to other thicker insulating materials. 2  Enhanced compressive and tensile strength at cryogenic temperatures make it resistant cracking.
I believe you are probably referring to microfoam steamed milk which is added to espresso coffee in a caffe latte or cappuccino. In this context, microfoam means steamed milk with a velvet texture due to very tiny (invisible, far too small to see) bubbles. Microfoam is widely considered the ideal preparation of steamed milk for coffee. It requires some skill as well as good equipment and milk to create it. It has a lovely mouthfeel.