Loess, a collapsible soil, is widely distributed in the Qinghai–Tibet Plateau China. In meantime, loess sustainable and green building material that used traditional residential buildings. However, previous studies have focused on properties of itself, ignoring influence climatic conditions buildings, as well series engineering problems such soil spalling caused by freezing thawing, cold cracks...

The influence of heat-shocking and freeze-shocking on cell viability, autolytic properties, aminopeptidase, esterase activities and acid production of Lb. helveticus and Lb. casei was studied in buffer and in a cheese slurry system. Heat­ shocking had the most destructive effect on cell viability. The rate of acid production in milk was a function of the attenua­ tion method. Among all strains ...

In regions exposed to floods followed by cold weather, brick masonry as a structural basis of the building envelope can be damaged due accompanying phenomenon freezing and thawing. The main purpose article is development mathematical model able predict chosen mechanical parameters damage index wallets for given number freeze-thaw cycles. For this, statistical derived from experimental data used...

Plasma membrane ATPase has been proposed to be functionally altered during early stages of injury caused by a freeze-thaw stress. Complete recovery from freezing injury in onion cells during the postthaw period provided evidence in support of this proposal. During recovery, a simultaneous decrease in ion leakage and disappearance of water soaking (symptoms of freeze-thaw injury) has been noted....

The objective of this study was to specify the effects of centrifugation and different surface of soybean lecithin-based extender on post-thaw Sperm quality of Ghezel ram semen. Semen samples were gathered from 5 mature Ghezel ram two/week for 3 weeks. After initial evaluation, the approved semen samples were pooled together and split into equal parts in Falcon tubes. Three samples were combine...

Background: The repeated freeze-thaw events during cold season, freezing of soils in autumn and thawing in spring are typical for the tundra, boreal, and temperate soils. The thawing of soils during winter-summer transitions induces the release of decomposable organic carbon and acceleration of soil respiration. The winter-spring fluxes of CO2 from permanently and seasonally frozen soils are es...

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...

We tested the hypotheses that freezing-induced embolism is related to conduit diameter, and that conifers and angiosperms with conduits of equivalent diameter will exhibit similar losses of hydraulic conductivity in response to freezing. We surveyed the freeze-thaw response of conifers with a broad range of tracheid diameters by subjecting wood segments (root, stem and trunk wood) to a freeze-t...

Tunnels located in cold regions are vulnerable to frost damage resulting from the special atmosphere, which directly threatens safety of tunnel structure and operation. Frost problems tunnels have not been fundamentally resolved. This paper reviews design theory mitigation techniques currently used design, construction maintenance region tunnels. The depths freezing thawing heaving force key in...