We compared responses of cuttings and seedlings of Eucalyptus globulus Labill. subsp. globulus to water stress in a 9-week greenhouse experiment. Optimal water availability was achieved by watering pots daily to field capacity, and two water stress treatments were imposed by reducing watering frequency to every 6 or 14 days. Within each treatment, height growth rates of cuttings and seedlings w...

abstract during growing seasons of years 2006 & 2007, a faunistic survey on syrphidae family(diptera) in agroecosystems of neyshabor region, khorasan-e-razavi province was carried out. in this study, 3 collection methods: yellow water trap, malaise trap and sweeping net were applied. the results showed a large difference between different collection methods. specimens of 14 species collected by...

The measurement of currents and water properties is of great importance, but few comprehensive reviews have been written. Many of today's current measurement techniques were either described or anticipated nearly 15 years ago (see, e.g., Dobson et al., 1980). Since then, significant improvements have been made in sensors, electronics, computers and positioning and telemetry systems. Extensive t...

Folded polymers are used in Nature for virtually every vital process. Nonnatural folded polymers, or foldamers, have the potential for similar versatility, and the design and refinement of such molecules is of considerable current interest. Here we report a complete and systematic analysis of the relationship between side chain structure and the 14-helicity of a well-studied class of foldamers,...

At the 1972 Stockholm Conference on Environment, the world community called for a standing watch on global trends in key environmental sectors. From this concern grew the United Nations "Global Environment Monitoring System" (GEMS). Surface and groundwater quality is one component (GEMS/Water). Global patterns of surface water pollution have been summarized by GEMS for the UNCED process. The co...

temporal resolution must be both sufficiently extensive and Sediment cores collected from the southern basin of Lake Titifine-scaled to describe patterns that appear at the scale of caca (Bolivia/Peru) on a transect from 4.6 m above overflow level the processes of interest. When the affected processes are to 15.1 m below overflow level are used to identify a new centurycertain human activities,...

The majority of the Earth's shallow crust is composed of basalt that erupted on the seafloor and was subsequently altered by chemical exchange with seawater. One aspect of this alteration is the replacement of glass by secondary minerals, including clays. Petrographic thin sections from ODP Holes 504B and 896A revealed characteristic patterns of pitting (channels) at the interface of fresh basa...

We propose a new calculation method to better estimate the deep water ventilation age from benthic-planktonic foraminifera 14C ages. Our study is motivated by the fact that changes in atmospheric A14C through time can cause contemporary benthic and planktonic foraminifera to have different initial A14C values. This effect can cause spurious ventilation age changes tobe interpreted from the geol...

beta-Peptides have attracted considerable attention by virtue of their ability to populate helical secondary structures in methanol, even in the absence of stabilizing tertiary interactions. Recent efforts in beta-peptide design have produced few beta3-peptides that form stable 14-helices in water; those that do require stabilizing intramolecular salt bridges on two of three helical faces and t...