Objective. To determine the freezing and thawing rates necessary to maintain sperm viability during cryopreservation of Bocachico semen. Materials and methods. Four interactional treatments were implemented between two freezing (rapid and slow) and two thawing (rapid and slow) curves, in a 2x2 factorial as follows: rapid freezing-rapid thawing, rapid freezing-slow thawing, slow freezingrapid th...

Climate change is likely to modify the freezing–thawing cycles in soils and surface waters of permafrost-affected subarctic regions. However, solution chemical composition during ice formation evolution remaining fluids remain very poorly known. Towards a better understanding dissolved (<0.45 µm) organic carbon, as well major trace element behavior permafrost peatland environments, here we p...

Abifract: Ef}ccts of Freezing on Major Arteries • Thirty experiments were performed in dogs to assess the effects of freezing on carotid and femoral arteries. These vessels withstood freezing and thawing without rupture. Blood within the vessels did not clot and was lysed during thawing. Histological changes of vessel walls consisted of early degeneration followed by a reparative process. Occas...

This paper reviews the effects of freezing/thawing on technological properties of meat. Thus, the effects of freezing/thawing on drip loss have been presented. At the same time, novel thawing methods opposing conventional ones have been considered.

Ectotherms overwintering in temperate ecosystems must survive low temperatures while conserving energy to fuel post-winter reproduction. Freeze-tolerant wood frogs, Rana sylvatica, have an active response to the initiation of ice formation that includes mobilising glucose from glycogen and circulating it around the body to act as a cryoprotectant. We used flow-through respirometry to measure CO...

Sperm storage via freezing has been useful for men who have difficulty masturbating during assisted reproductive technology (ART) programs and before impotency caused by chemotherapy, vasectomy, and other procedures. Studies were undertaken to evaluate the extent of cryoinjury to sperm after repeated freezing and thawing. The results showed that normozoospermic and oligozoospermic sperm survive...

There is much evidence to suggest that the structural and functional integrity of many biochemical materials is unaltered by freezing if the rate of cooling is rapid and the storage temperature low (2-6). Isolated enzymes and mixtures of enzymes and their substrates, after rapid freezing at low temperatures, often retain their activities and in some cases show enhanced activity upon thawing (7-...