BACKGROUND Cardiac cryoablation is a minimally invasive procedure to treat cardiac arrhythmias by cooling cardiac tissues responsible for the cardiac arrhythmia to freezing temperatures. Although cardiac cryoablation offers a gentler treatment than radiofrequency ablation, longer interventions and higher recurrence rates reduce the clinical acceptance of this technique. Computer models of ablat...

background: freezing is a common way and one of the best methods of seafood preservation for long periods of time; however, the freeze thawing process may influence the quality of food. objectives: oxidation and denaturation of proteins, sublimation and recrystallization of ice crystals can cause changes in the quality of the frozen products. this study was aimed to evaluate the effect of three...

The objective was to determine the relationship between thawing time and post-thaw temperature when the final temperature of the semen was brought to 40 C. One ejaculate from each of 12 dairy bulls was packaged in .5-ml French straws. Semen in five straws from each ejaculate was thawed in a 35 c water bath for 12 s or 1 min. The straws were then immediately placed in water baths at 0, 10 or 20 ...

Preservation of bacteria at the temperature of dry ice (-78.5 C) is a particularly valuable method for the maintenance of such organisms as Treponema pallidum which otherwise require continuous animal-to-animal passage. Turner (1938), Turner and Fleming (1939), and Turner and Brayton (1939) demonstrated that at the temperature of dry ice T. pallidum and relapsing fever spirochetes retain their ...

background: spermatozoa cryopreservation is used for the management of infertility and some other medical conditions. the routinely applied cryopreservation technique depends on permeating cryoprotectants, whose toxic effects have raised the attention towards permeating cryoprotectants-free vitrification technique. objective: to compare between the application of slow cryopreservation and vitri...