Concern over nonpoint source P losses from agricultural lands to surface waters in frigid climates has focused attention on the role of freezing and thawing on P loss from catch crops (cover crops). This study evaluated the effect of freezing and thawing on the fate of P in bare soils, soils mixed with dairy manure, and soils with an established catch crop of annual ryegrass (Lolium multiflorum...

Soil freezing-thawing cycle may substantially influence soil physical properties, microbial activity, and the rates of carbon and nitrogen cycling in soils. In this study, the soil water soluble organic C, N (WSOC, WSON) as well as microbial biomass C, N (MBC, MBN) of two alpine grassland types, alpine meadow and alpine steppe, were investigated after freezing-thawing cycles in a grassland land...

The aim of this study was to determine whether more than once freezing and thawing of serum affects different patterns of anti-nuclear antibodies (ANA) and anti-neutrophil cytoplasmic antibodies (ANCA) as also to determine for how many days can serum samples be reliably refrigerated (2-8oC) for these tests. A total of 20 ANA (6 homogenous, 3 speckled, 3 centromere, 2 nucleolar, 2 cytoplasmic an...

Freezing-thawing resistance is a very significant characteristic for concrete in severe environment (such as cold region with the lowest temperature below 0°C). In this study, ordinary-air-entrained (O-A-E) concrete was produced in a laboratory environment; the compressive strength, cubic compressive strength of C50, C40, C30, C25, and C20 ordinary-air-entrained concrete, tensile strength, and ...

Reactive oxygen species (ROS) generation, induced by the cryopreservation process, can be responsible for mammalian sperm damage. Curcumin is known as an effective antioxidant against oxidative stress. The aim of this study was to evaluate the effects of curcumin on sperm count, motility and viability, semen total antioxidant capacity and DNA integrity of rat spermatozoa during semen freeze-tha...

The effect of adding xanthan gum and locust bean gum at low concentrations (0.15% w/w) on the freeze/ thaw stability of white sauces prepared with native starches from four different sources (corn, waxy corn, potato, and rice) was investigated. Linear viscoelastic properties were taken as structural indicators and these and syneresis as indicators of the freeze/thaw stability of the sauces. The...

In the pharmaceutical industry, cryoprotectants are added to buffer formulations protect active ingredient from freeze- and thaw damage. We investigated freezing thawing of aqueous sodium citrate with various cryoprotectants, specifically amino acids (cysteine, histidine, arginine, proline lysine), disaccharides (trehalose sucrose), polyhydric alcohols (glycerol mannitol) surfactants (polysorba...

this paper is based on an experimental research that examined the effects of concrete`s major parameters on durability of concrete pavements and curbs under freezing and thawing cycles. these parameters include concrete mix design parameters such as water-cement ratio, fine aggregate percentage and using air entraining admixture and simulating real freeze-thaw cycles that infrastructures underg...