2,532 research outputs found

    Applications of HCMM data to soil moisture snow and estuarine current studies

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    There are no author-identified significant results in this report

    Application of HCMM data to soil moisture snow and estuarine current studies

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    There are no author-identified significant results in this report

    Applications of HCMM data to soil moisture snow and estuarine current studies

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    There are no author-identified significant results in this report

    Selected Hydrologic Applications of LANDSAT-2 Data: an Evaluation

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    The author has identified the following significant results. Estimates of soil moisture were obtained from visible, near-IR gamma ray and microwave data. Attempts using GOES thermal-IR were unsuccessful due to resolutions (8 km). Microwaves were the most effective at soil moisture estimates, with and without vegetative cover. Gamma rays provided only one value for the test site, produced by many data points obtained from overlapping 150 meter diameter circles. Even though the resulting averaged value was near the averaged field moisture value, this method suffers from atmospheric contaminants, the need to fly at low altitudes, and the necessity of prior calibration of a given site. Visible and near-IR relationships are present for bare fields but appear to be limited to soil moisture levels between 5 and 20%. The densely vegetated alfalfa fields correlated with near-IR reflectance only; soil moisture values from wheat fields showed no relation to either or near-IR MSS data

    High Resolution Spectrometry of Leaf and Canopy Chemistry for Biochemical Cycling

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    High-resolution laboratory spectrophotometer and Airborne Imaging Spectrometer (AIS) data were used to analyze forest leaf and canopy chemistry. Fundamental stretching frequencies of organic bonds in the visible, near infrared and short-wave infrared are indicative of concentrations and total content of nitrogen, phosphorous, starch and sugar. Laboratory spectrophotometer measurements showed very strong negative correlations with nitrogen (measured using wet chemistry) in the visible wavelengths. Strong correlations with green wet canopy weight in the atmospheric water absorption windows were observed in the AIS data. A fairly strong negative correlation between the AIS data at 1500 nm and total nitrogen and nitrogen concentration was evident. This relationship corresponds very closely to protein absorption features near 1500 nm

    Evaluation of LANDSAT-2 data for selected hydrologic applications

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    There are no author-identified significant results in this report

    Applications of HCMM data to soil moisture snow and estuarine current studies

    Get PDF
    There are no author-identified significant results in this report

    Applications of HCMM data to soil moisture snow and estuarine current studies

    Get PDF
    There are no author-identified significant results in this report

    Applications of HCMM data to soil moisture snow and estuarine current studies

    Get PDF
    There are no author-identified significant results in this report

    LcrG secretion is not required for blocking of Yops secretion in Yersinia pestis

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    <p>Abstract</p> <p>Background</p> <p>LcrG, a negative regulator of the <it>Yersinia </it>type III secretion apparatus has been shown to be primarily a cytoplasmic protein, but is secreted at least in <it>Y. pestis</it>. LcrG secretion has not been functionally analyzed and the relevance of LcrG secretion on LcrG function is unknown.</p> <p>Results</p> <p>An LcrG-GAL4AD chimera, originally constructed for two-hybrid analyses to analyze LcrG protein interactions, appeared to be not secreted but the LcrG-GAL4AD chimera retained the ability to regulate Yops secretion. This result led to further investigation to determine the significance of LcrG secretion on LcrG function. Additional analyses including deletion and substitution mutations of amino acids 2–6 in the N-terminus of LcrG were constructed to analyze LcrG secretion and LcrG's ability to control secretion. Some changes to the N-terminus of LcrG were found to not affect LcrG's secretion or LcrG's secretion-controlling activity. However, substitution of poly-isoleucine in the N-terminus of LcrG did eliminate LcrG secretion but did not affect LcrG's secretion controlling activity.</p> <p>Conclusion</p> <p>These results indicate that secretion of LcrG, while observable and T3SS mediated, is not relevant for LcrG's ability to control secretion.</p
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