The pipetting accuracy of pipette tips by certain manufacturers may suffer after autoclaving. This was not the case for Eppendorf tips. We describe the measures which Eppendorf takes in order to avoid the negative influences of autoclaving. Furthermore, we describe how the interference of biological assays by leachables from pipette tips is prevented. A MEA (Mouse Embryo Assay) test proves that...

Charinus taboa sp. n. comprises the twenty-second species of the genus described for Brazil. The new species belongs to the eastern Brazilian group, in which all species have sucker-like gonopods. Charinus taboa sp. n. has a marked sexual dimorphism in the pedipalps as do other members of the genus in the country. The description of Charinus taboa sp. n. offers an opportunity to discuss some as...

Participants: N. Vijaykrishnan, Prof. of Computer Science and Eng. Dept. K. Ünlü, Prof. of Mechanical and Nuclear Eng. Dept. Y. Xie, Prof. of Computer Science and Eng. Dept. M. J. Irwin, Prof. of Computer Science and Eng. Dept. Ramakrishnan Krishnan, Ph.D. student at Electrical Eng. Dept. Rajaraman Ramanarayanan, Ph.D. student at Electrical Eng. Dept. S. M. Çetiner, Ph.D. student at Mechanical ...

Fish develop morphological specializations in their trophic and locomotor systems as a result of varying functional demands in response to environmental pressures at different life stages. These specializations should maximize particular performances in specialists, adapting them to their trophic and habitat niches at each ontogenetic stage. Because differential growth rates of the structural c...

Body reflections in the ultraviolet (UV) are a common occurrence in nature. Despite the abundance of such signals and the presence of UV cones in the retinas of many vertebrates, the function of UV cones in the majority of taxa remains unclear. Here, we report on an unusual communication system in the razorback sucker, Xyrauchen texanus, that involves flash signals produced by quick eye rolls. ...

Methods are described by which DNA can be amplified directly from ectomycorrhizal root tip homogenates of a variety of plant species (Picea mariana (black spruce), Betula papyrifera (paper birch), Populus tremuloides (trembling aspen) and Alnus sp.(alder)), including root tips that have been preserved in RNA Later (Ambion, Austin, TX). In most cases for extracts and homogenates diluted 10-fold ...

Reproducible fabrication of sharp gold- or silver-coated tips has become the bottleneck issue in tip-enhanced Raman spectroscopy, especially for atomic force microscopy (AFM)-based TERS. Herein, we developed a novel method based on pulsed electrodeposition to coat a thin gold layer over atomic force microscopy (AFM) tips to produce plasmonic TERS tips with high reproducibility. We systematicall...

A method based on the measurement of ATP/ADP ratios is described. It permits the determination of the critical respiratory oxygen pressure of any organ, or part of any organ, of an intact plant. The data obtained by this method with intact maize (Zea mays L. INRA 508) root tips are compared with polarographic determinations on similar excised tissues.When internal O(2) transport from the aerial...

Describing textures is a challenging problem in computer vision and pattern recognition. The classification problem involves assigning a category label to the texture class it belongs to. Several factors such as variations in scale, illumination and viewpoint make the problem of texture description extremely challenging. A variety of histogram based texture representations exists in literature....

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