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https://www.readbyqxmd.com/read/26443667/cellulose-synthase-interactive1-is-required-for-fast-recycling-of-cellulose-synthase-complexes-to-the-plasma-membrane-in-arabidopsis
#1
Lei Lei, Abhishek Singh, Logan Bashline, Shundai Li, Yaroslava G Yingling, Ying Gu
Plants are constantly subjected to various biotic and abiotic stresses and have evolved complex strategies to cope with these stresses. For example, plant cells endocytose plasma membrane material under stress and subsequently recycle it back when the stress conditions are relieved. Cellulose biosynthesis is a tightly regulated process that is performed by plasma membrane-localized cellulose synthase (CESA) complexes (CSCs). However, the regulatory mechanism of cellulose biosynthesis under abiotic stress has not been well explored...
October 2015: Plant Cell
https://www.readbyqxmd.com/read/26375760/scattering-based-hyperspectral-imaging-of-plasmonic-nanoplate-clusters-towards-biomedical-applications
#2
Aniruddha Ray, Raoul Kopelman, Bonghwan Chon, Kimberly Briggman, Jeeseong Hwang
A new optical scattering contrast-agent based on polymer-nanoparticle encapsulated silver nanoplates (PESNs) is presented. Silver nanoplates were chosen due to the flexibility of tuning their plasmon frequencies. The polymer coating preserves their physical and optical properties and confers other advantages such as controlled contrast agent delivery. Finite difference time domain (FDTD) simulations model the interaction of light with the nanoplates in different orientations in the cluster. Hyperspectral dark field microscopy (HYDFM) observes the scattering spectra of the PESNs...
July 2016: Journal of Biophotonics
https://www.readbyqxmd.com/read/25508746/-an-algorithm-of-spectral-minimum-shannon-entropy-on-extracting-endmember-of-hyperspectral-image
#3
Ke-ming Yang, Shi-wen Liu, Lin-wei Wang, Jie Yang, Yang-yang Sun, Dan-dan He
It's significant to study the algorithm of endmember extraction, which is the key for pixel unmixing,in the fields of feature identification, abundance inversion, quantitative remote sensing and so on. Based on the theory of shannon entropy and Gaussian distribution function, a new algorithm, named spectral minimum shannon entropy (SMSE) method for extracting end-members of hyperspectral images, is proposed in the present paper after analyzing the characteristics of spectra of the hyperspectral images. This algorithm was applied to extract the endmembers of an AVRIRS hyperspectral image, it was found that these extracted endmember spectra have higher precision by matching with the spectral library of United States Geological Survey (USGS)...
August 2014: Guang Pu Xue Yu Guang Pu Fen Xi, Guang Pu
https://www.readbyqxmd.com/read/25474967/-an-algorithm-of-spectral-minimum-shannon-entropy-on-extracting-endmember-of-hyperspectral-image
#4
Ke-ming Yang, Shi-wen Liu, Lin-wei Wang, Jie Yang, Yang-yang Sun, Dan-dan He
It's significant to study the algorithm of endmember extraction, which is the key for pixel unmixing,in the fields of feature identification, abundance inversion, quantitative remote sensing and so on. Based on the theory of shannon entropy and Gaussian distribution function, a new algorithm, named spectral minimum shannon entropy (SMSE) method for extracting end-members of hyperspectral images, is proposed in the present paper after analyzing the characteristics of spectra of the hyperspectral images. This algorithm was applied to extract the endmembers of an AVRIRS hyperspectral image, it was found that these extracted endmember spectra have higher precision by matching with the spectral library of United States Geological Survey (USGS)...
August 2014: Guang Pu Xue Yu Guang Pu Fen Xi, Guang Pu
https://www.readbyqxmd.com/read/24945827/functional-characterization-of-a-novel-family-of-acetylcholine-gated-chloride-channels-in-schistosoma-mansoni
#5
Kevin MacDonald, Samuel Buxton, Michael J Kimber, Tim A Day, Alan P Robertson, Paula Ribeiro
Acetylcholine is the canonical excitatory neurotransmitter of the mammalian neuromuscular system. However, in the trematode parasite Schistosoma mansoni, cholinergic stimulation leads to muscle relaxation and a flaccid paralysis, suggesting an inhibitory mode of action. Information about the pharmacological mechanism of this inhibition is lacking. Here, we used a combination of techniques to assess the role of cholinergic receptors in schistosome motor function. The neuromuscular effects of acetylcholine are typically mediated by gated cation channels of the nicotinic receptor (nAChR) family...
June 2014: PLoS Pathogens
https://www.readbyqxmd.com/read/24160874/a-novel-classification-method-for-multispectral-imaging-combined-with-portable-raman-spectroscopy-for-the-analysis-of-a-painting-by-vincent-van-gogh
#6
Anna Cesaratto, Austin Nevin, Gianluca Valentini, Luigi Brambilla, Chiara Castiglioni, Lucia Toniolo, Maria Fratelli, Daniela Comelli
In this work, a novel combination of portable micro-Raman spectroscopy and semi-automatic methods of data treatment are proposed for the classification and mapping of visible multispectral imaging data for the analysis of a painting on paper by Vincent Van Gogh. Analysis of multispectral imaging data with the sequential maximum-angle convex cone (SMACC) and spectral angle mapper (SAM) algorithms differentiated the surface into areas on the basis of the presence of pigment mixtures. Complementary analytical information was obtained through portable Raman spectroscopy was performed on a few selected points of the painting, allowing for the determination of Van Gogh's palette and the mapping of pigment mixtures on the painting's surface; the number of mixtures employed is varied and at least two different blues are present...
November 2013: Applied Spectroscopy
https://www.readbyqxmd.com/read/22751327/cellulose-synthase-interactive-protein-1-csi1-mediates-the-intimate-relationship-between-cellulose-microfibrils-and-cortical-microtubules
#7
Lei Lei, Shundai Li, Ying Gu
Cellulose is synthesized at the plasma membrane by protein complexes known as cellulose synthase complexes (CSCs). The cellulose-microtubule alignment hypothesis states that there is a causal link between the orientation of cortical microtubules and orientation of nascent cellulose microfibrils. The mechanism behind the alignment hypothesis is largely unknown. CESA interactive protein 1 (CSI1) interacts with CSCs and potentially links CSCs to the cytoskeleton. CSI1 not only co-localizes with CSCs but also travels bi-directionally in a speed indistinguishable from CSCs...
July 2012: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/20052093/hyperspectral-agricultural-mapping-using-support-vector-machine-based-endmember-extraction-svm-bee
#8
Anthony M Filippi, Rick Archibald, Budhendra L Bhaduri, Edward A Bright
Extracting endmembers from remotely-sensed images of vegetated areas can present difficulties. In this research, we applied a recently-developed endmember-extraction algorithm based on Support Vector Machines to the problem of semi-autonomous estimation of vegetation endmembers from a hyperspectral image. This algorithm, referred to as Support Vector Machine-Based Endmember Extraction (SVM-BEE), accurately and rapidly yields a computed representation of hyperspectral data that can accommodate multiple distributions...
December 21, 2009: Optics Express
https://www.readbyqxmd.com/read/19050390/delayed-anti-hcv-antibody-response-in-hiv-positive-men-acutely-infected-with-hcv
#9
Emma C Thomson, Eleni Nastouli, Janice Main, Peter Karayiannis, Joseph Eliahoo, David Muir, Myra O McClure
OBJECTIVE: An epidemic of acute hepatitis C virus (HCV) infection among HIV-positive men who have sex with men is occurring in urban centers in Western Europe and the United States. Early diagnosis and treatment of HCV results in improved sustained virological response rates. This study compared the sensitivity of reverse transcriptase PCR (RT-PCR) versus antibody screening for the diagnosis of early HCV infection in HIV-positive patients and estimated the length of time from HCV infection to the development of anti-HCV antibodies...
January 2, 2009: AIDS
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