Freeze-thaw cycles are predicted to increase in cold temperate regions. The potential influence of the interactions of freeze-thaw cycles and agrochemicals on the release of Cd into river water is unknown. In this study, the interactions of freeze-thaw cycles and chlorpyrifos (FC) on Cd mobility in soils were analysed. The spatial variability of soil Cd under long-term intensive tillage in a fr...

doi: 10.1111/j.1399-3054.2006.00644.x Previous studies indicate that conifers are vulnerable to cavitation induced by drought but in many cases, not by freezing. Rarely have vulnerability to drought and freezing stress been studied together, even though both influence plant physiology and the abundance and distribution of plants in many regions of the world. We studied vulnerability to droughta...

The terrestrial cryosphere comprises cold areas of Earth’s land surface where water is either permanently or seasonally frozen. This includes most regions north of 40 degrees North latitude and most mountainous regions where elevation is greater than 1000m [1]. Permafrost is ground that perennially at or below 0 throughout the year. Above the permafrost is the active layer, which experiences su...

OBJECTIVES The stability of circulating proteins can be affected by repeated freezing and thawing. The aim of our study was to identify the effect of repeated freezing and thawing on the plasma and serum concentrations of eight proteins [interferon-γ, interleukin (IL)-8, IL-15, IL-17A, matrix metalloproteinase (MMP)-7, tumor necrosis factor-α, vascular endothelial growth factor (VEGF), and VEGF...

Ice formation in the xylem sap produces air bubbles that under negative xylem pressures may expand and cause embolism in the xylem conduits. We used the centrifuge method to evaluate the relationship between freeze-thaw embolism and conduit diameter across a range of xylem pressures (Px) in the conifers Pinus contorta and Juniperus scopulorum. Vulnerability curves showing loss of conductivity (...

The degradation of concrete material under multiple freeze–thaw cycles is an important issue for structures in cold and wet regions. This paper proposed a physical and mechanical model to explain the deformation behavior observed in previous experiments, from internal pressure calculation to mesoscale simulation, and for both closed and open freeze–thaw tests. Three kinds of internal pressures ...

The present study compared three different methods for measuring plasma vitellogenin (VTG) in fathead minnow (FHM; Pimephales promelas): A procedure using liquid chromatography with electrospray ionization combined with tandem mass spectrometry (LC/ESI-MS/MS), and two commercial enzyme-linked immunoassay (ELISA) kits using either anti-carp or anti-FHM antibodies. The influence on plasma VTG mea...

BACKGROUND The clinical results of in vitro fertilization of slowly frozen-thawed oocytes are known to be significantly worse than those obtained by fresh oocytes. Little is known about the factors affecting the clinical outcome of frozen-thawed oocytes. The aim of this retrospective study was to explore the role of oocyte cryopreservation in the group of patients with no available sperm on the...

The wide distribution of alpine saline areas in China is faced with two major problems, which are salt intrusion and freeze–thaw. In total, 216 specimens were prepared 6 kinds concrete mix proportions this paper. effects the single compound incorporation metakaolin (MK) polypropylene fiber (PPF) different amounts on mechanical properties microstructure investigated under dual action multi-salt ...

INTRODUCTION Optimal storage of serum specimens in central laboratories for a long period for multicenter reference interval studies, or epidemiologic studies remains to be determined. We aimed to examine the analytical stability of chemistry analytes following numerous freeze-thaw and long-term storage. MATERIALS AND METHODS Serum samples were obtained from 15 patients. Following baseline me...