One adaptation of plants to cope with drought or frost stress is to develop wood that is able to withstand the formation and distribution of air bubbles (emboli) in its water conducting xylem cells under negative pressure. The ultrastructure of interconduit pits strongly affects drought-induced embolism resistance, but also mechanical properties of the xylem are involved. The first experimental...

Abstract Attempts to modify cement-based mixtures and improve their properties have always attracted the attention of researchers. Favorable effects nanoparticles, such as small particle size, high reactivity, great surface area, made them be used one best replacements cement. This paper aims review previous researches conducted regarding nanoparticles on concretes. Influence various types work...

In recent years, permeable concrete has been widely used in the construction of urban pavement. However, it discovered that during practical use, cracking pavement seasonal freezing areas is more severe due to its poor frost resistance, and phenomenon threshing evident. To obtain meets resistance requirements areas, mixed with basalt fiber VAE-707 emulsion was studied this study. The conclusion...

Local adaptations to environmental conditions are of high ecological importance as they determine distribution ranges and likely affect species responses to climate change. Increased environmental stress (warming, extreme drought) due to climate change in combination with decreased genetic mixing due to isolation may lead to stronger local adaptations of geographically marginal than central pop...

Full blown uremic syndrome of chronic kidney disease (CKD) is seldom seen these days due to early initiation of renal replacement therapies (RRT) [1, 2]. Uremic frost is a manifestation of advanced CKD but rarely seen due to effective RRT. We came across a 21-year-old male patient, brought to us with complaints of nausea, anorexia, oliguria and recent onset alteration in sensorium. On physical ...

CMAJ • NOVEMBER 23, 2010 • 182(17) © 2010 Canadian Medical Association or its licensors E800 A62-year-old man with a history of diabetic ne phropathy presented with confusion, generalized swelling and shortness of breath. He had been noncompliant with dialysis therapy and then had been lost to medical follow-up for about six months. On clinical examination, the patient was somnolent and disorie...