In temperate agricultural watersheds, the rehabilitation of tree vegetation in degraded riparian zones can provide many ecosystem services. This study evaluated ecosystem service provision potential following the conversion of non-managed herbaceous buffers to hybrid poplar (Populus spp.) buffers in three watersheds (555–771 km2) of southern Québec (Canada), with contrasting agricultural land u...

We coordinated a large-scale evaluation of northern bobwhite (Colinus virginianus) population response to establishment of 9-m to 37-m linear patches (buffers) of native herbaceous vegetation along rowcrop field margins as part of the Conservation Reserve Program practice Habitat Buffers for Upland Birds (CP33). We compared northern bobwhite covey densities on 1,088 paired row-crop fields with ...

Two new non-barbiturate buffers have been formulated for serum protein electrophoresis on cellulose acetate membranes. Both buffers give five distrinct fractions and are suitable for all systems, but have been primarily designed to meet the needs of the Gelman "Sepratek" system. One buffer is a tris(hydroxymethyl)aminomethane (Tris)/hippurate formulation; the other is composed of Tris/N-[tris(h...

It was a strange choice to ask me, who has not contributed to the description of the titration behavior of proteins, to discuss tha t subject. Nevertheless I am pleased to attempt to summarize the state of knowledge for our present purposes. Our best objective in this monograph is surely to make ourselves and each other better informed; we will be examining the meaning of terms for that purpose...

This paper reviewed the comparison between different clock distribution schemes which used for low power VLSI design which are the most important aspect in the industry. The main clock distribution schemes are single driver clock scheme and distributed buffers clock scheme. There are different tradeoffs in both the techniques such as size of buffers, number of buffers etc.

In recent years, there has been growing recognition of the importance of riparian buffers between agricultural fields and waterbodies. Riparian buffers play an important role in mitigating the impacts of land use activities on water quality and aquatic ecosystems. However, evaluating the effectiveness of riparian buffer systems on a watershed scale is complex, and watershed models have limited ...

Riparian buffers are commonly promoted to protect stream water quality. A common conceptual assumption is that buffers “intercept” and treat upland runoff. As a shift in paradigm, it is proposed instead that riparian buffers should be recognized as the parts of the landscape that most frequently generate storm runoff. Thus, water quality can be protected from contaminated storm runoff by disass...

Intracellular Ca(2+) release is a versatile second messenger system. It is modeled here by reaction-diffusion equations for the free Ca(2+) and Ca(2+) buffers, with spatially discrete clusters of stochastic IP(3) receptor channels (IP(3)Rs) controlling the release of Ca(2+) from the endoplasmic reticulum. IP(3)Rs are activated by a small rise of the cytosolic Ca(2+) concentration and inhibited ...

The pH stability of the free laccase and the immobilized laccase was determined by incubating the enzyme in different buffers (pH 3.0-8.0) for 6 h at 35 °C. The buffers used were Na2HPO4–sodium citrate buffer (pH 3.0-8.0). The immobilized laccase was collected by centrifugation (3500 g for 3 min) and air-dried. The residual specific activities of free or immobilized laccase were then determined...

Vegetative buffer strips are being widely promoted as an effective technique to protect rivers and streams from the negative impacts of adjacent land uses including forestry and agriculture. An extensive review of the literature revealed that despite the intuitive appeal of buffer strips, data demonstrating their efficacy is highly variable and most studies demonstrating significant nutrient re...