FAMILY MEDICINE or IM/PEDS at BAC Medical Marketing (Oklahoma City, OK)
Spanish/English speaking BC or BE Family Medicine or IM/Peds physician needed to join other primary care physicians at the busy ambulatory clinic attached to the Medical Center. Employment offers guaranteed salary and employment bonus, ...
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Why do I need insurance for overseas moving?
If you hire a professional overseas mover then it’s their full responsibility to deliver your household goods in good order, right? Not exactly… It’s their duty to take good care of your belongings but for any overseas mover it’s impossible to control everything that happens along the trip: trucking companies, ports, warehouses, Customs, weather conditions, acts of God can all bring the hazards to your cargo.
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Mechanical Engineer at Graham & Associates (Oklahoma City, OK)
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INTERNAL MEDICINE at BAC Medical Marketing (Enid, OK)
INTERNAL MEDICINE PHYSICIAN - Located 80 miles north of Oklahoma City - 225-bed hospital with New Emergency Department - Low Managed Care - City of 50, 000, with a service area for IM of 100, 000 - Traditional inpatient and outpatient...
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INTERNAL MEDICINE + PEDS at BAC Medical Marketing (Grove, OK)
INTERNAL MEDICINE / PEDIATRICS - Located 80 mile northeast of Tulsa, Oklahoma on beautiful Grand Lake 'O the Cherokees - Employment with base salary, productivity bonuses and generous benefits package - Service area for IM/PD in excess of...
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Part-Time Package Handler (Entry Level) at UPS (Stillwater, OK)
Ideal Job For Working Students & People Looking For Extra Cash! A weekly paycheck. Generous tuition assistance up to $3, 000 per year*. Convenient, consistent hours that fit within your schedule. And paid, full-time benefits for permanent, ...
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Color blindness and contrast perception in cuttlefish (Sepia officinalis) determined by a visual sensorimotor assay

Full paper at above link

Abstract:

We tested color perception based upon a robust behavioral response in which cuttlefish (Sepia officinalis) respond to visual stimuli (a black and white checkerboard) with a quantifiable, neurally controlled motor response (a body pattern).

In the first experiment, we created 16 checkerboard substrates in which 16 grey shades (from white to black) were paired with one green shade (matched to the maximum absorption wavelength of S. officinalis' sole visual pigment, 492 nm), assuming that one of the grey shades would give a similar achromatic signal to the tested green.

In the second experiment, we created a checkerboard using one blue and one yellow shade whose intensities were matched to the cuttlefish's visual system.

In both assays it was tested whether cuttlefish would show disruptive coloration on these checkerboards, indicating their ability to distinguish checkers based solely on wavelength (i.e., color).

Here, we show clearly that cuttlefish must be color blind, as they showed non-disruptive coloration on the checkerboards whose color intensities were matched to the Sepia visual system, suggesting that the substrates appeared to their eyes as uniform backgrounds.

Furthermore, we show that cuttlefish are able to perceive objects in their background that differ in contrast by approximately 15%. This study adds support to previous reports that S. officinalis is color blind, yet the question of how cuttlefish achieve "color-blind camouflage" in chromatically rich environments still remains. [colour]


technorati tags: cuttlefish, color, colour, experiment, checkerboard, blind, camouflage, visual


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Response to Comment on 'Gene Regulatory Networks and the Evolution of Animal Body Plans' (Science)

The journal Science 11 August 2006:
Vol. 313. no. 5788, p. 761
DOI: 10.1126/science.1126765

Douglas H. Erwin and Eric H. Davidson

Contrary to Coyne's assertions, our paper did not advocate a macromutational innovation of phyla but considered the consequences of the introduction of developmental constraints for the evolution of gene regulatory networks based on recent empirical studies of gene regulatory networks.

Most of Coyne's concerns (1) are restatements of long-standing debates over the nature of evolutionary change (2). The comment offers no new data or interpretations but rather comments on issues, such as the nature of phyla, that have a lengthy and disputed history in evolutionary biology and which were not the subject of our paper. Specifically, Coyne seems to reject the role of regulatory genes in evolution. This is refuted by experimental studies of Drosophila, butterflies, echinoderms, fish, amniotes, and other organisms. Therefore, Coyne's conflict is not with our review as much as with developmental biology and its implications for evolutionary process. [Response]
--
See Comment on "Gene Regulatory Networks and the Evolution of Animal Body Plans"

and the original

Gene Regulatory Networks and the Evolution of Animal Body Plans

technorati tags: journal, science, innovation, phyla, developmental, constraints, evolution, gene, regulatory, networks, nature, evolutionary, change, new, data, history, biology, genes, experimental, drosophila, butterflies, fish, organisms, process, response, comment


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How To Buy Moving Insurance
Compare rates from different insurance providers including the one used by your moving company. The moving insurance rates are usually presented as percentage of the value of the cargo. So if you were quoted 2.5% to insure your household goods move it means that it’ll cost you $2.50 for each $100 of the value of your shipment. Be sure to check what type of moving insurance is offered.
Source: shipping-insurance.com

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