A new method is described for studying the metabolism of air-dry seeds. An initial pulse of (14)CO(2) was supplied to seeds maintained in air at controlled low water potentials for 6 months. Seeds were also infiltrated with 2-(14)C-acetate and with (14)C-l-leucine at 0 C, redried rapidly at 0 C, and maintained at controlled low water potentials for 4 to 6 weeks. The metabolism of the air-dry se...

In the Prologue I recall, among others, the period of the Cold War in which, thanks to Polish colleagues, scientific contacts between East and West were maintained . After that, several aspects of the flow of mixtures of air and water will be discussed and illustrated by examples. Finally I will give some comments on the differences and similarities between fundamental and applied science and s...

dense medium cyclone is a high capacity device that is widely used in coal preparation. it is simple in design but the swirling turbulent flow, the presence of medium and coal with different density and size fraction and the presence of the air-core make the flow pattern in dmcs complex. in this article the flow pattern simulation of dmc is performed with computational fluid dynamics and fluent...

The undertaken research replenishes the pool of knowledge about folklore texts and functions spellonyms as signs saturated with national cultural meanings. study establishes compares linguistic characteristics in onomasticon Australian Nanaian aetiological tales. authors proposed a typology which includes 5 thematic groups: nominations deities different nature; celestial bodies transformed from...

To the Editor:—I read with considerable interest the article by Benavides et al. describing experiments of air bubble growth in water during exposure to 100% nitrous oxide, 100% xenon, or 50% xenon–50% oxygen. Although the experiments were nicely conducted, they explore a physics of gas flux in an unconstrained bubble permitted to grow spherically. Importantly, this geometry has limited biologi...

Water transport in plants is based on a metastable system as the xylem "works" at negative water potentials (ψ). At critically low ψ, water columns can break and cause embolism. According to the air-seeding hypothesis, this occurs by air entry via the pits. We studied the formation of embolism in dehydrating xylem sections of Juniperus virginiana (Cupressaceae), which were monitored microscopic...