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T Delahaye, S E Maxwell, Z D Reed, H Lin, J T Hodges, K Sung, V M Devi, T Warneke, P Spietz, H Tran
In this article we describe a high-precision laboratory measurement targeting the R(6) manifold of the 2 ν 3 band of12 CH4 . Accurate physical models of this absorption spectrum will be required by the Franco-German, Methane Remote Sensing LIDAR (MERLIN) space mission for retrievals of atmospheric methane. The analysis uses the Hartmann-Tran profile for modeling line shape and also includes line-mixing effects. To this end, six high-resolution and high signal-to-noise absorption spectra of air-broadened methane were recorded using a frequency-stabilized cavity ring-down spectroscopy apparatus...
June 27, 2016: Journal of Geophysical Research. Atmospheres: JGR
Nathalia Luiza Andreazza, Christine Vevert-Bizet, Geneviève Bourg-Heckly, Franck Sureau, Marcos José Salvador, Stephanie Bonneau
Recent years have seen a growing interest in Berberine, a phytochemical with multispectrum therapeutic activities, as anti-tumoral agent for photodynamic therapy (PDT). In this context, low density lipoproteins (LDL) play a key role in the delivery of the photosensitizer in tumor cells. We correlate the physicochemical parameters of the berberine association to LDL with the influence of LDL-delivery on its accumulation in a glioma cell line and on its photo-induced activity in view of antitumor PDT. Our results evidence an important binding of 400 berberine molecules per LDL...
August 20, 2016: International Journal of Pharmaceutics
Anil Kumar, Ekavali, Kanwaljit Chopra, Madhurima Mukherjee, Raghavender Pottabathini, Dinesh K Dhull
Berberine, a benzylisoquinoline alkaloid, occurs as an active constituent in numerous medicinal plants and has an array of pharmacological properties. It has been used in Ayurvedic and Chinese medicine for its antimicrobial, antiprotozoal, antidiarrheal and antitrachoma activity. Moreover, several clinical and preclinical studies demonstrate ameliorative effect of berberine against several disorders including metabolic, neurological and cardiological problems. This review provides a summary regarding the pharmacokinetic and pharmacodynamic features of berberine, with a focus on the different mechanisms underlying its multispectrum activity...
August 15, 2015: European Journal of Pharmacology
Matthew J Cich, Damien Forthomme, Christopher P McRaven, Gary V Lopez, Gregory E Hall, Trevor J Sears, Arlan W Mantz
The P(11) line of the ν1 + ν3 combination band of C2H2 was studied using an extended cavity diode laser locked to a frequency comb. Line shapes were measured for acetylene and nitrogen gas mixtures at a series of temperatures between 125 and 296 K and total pressures up to 1 atm. The data were fit to two speed-dependent line shape models and the results were compared. Line shape parameters were determined by simultaneously fitting data for all temperatures and pressures in a single multispectrum analysis...
December 19, 2013: Journal of Physical Chemistry. A
Ping Chen, Yan Han, Jin-Xiao Pan
In conventional X-ray imaging based on fixed energy, the ray image of the complicated structural component often appears overexposed or underexposed. This is because of the variations in the effective thickness of the component along the orientation of the X-ray penetration that exceed the limit of the dynamic range of the X-ray imaging system. Complete structural information cannot be obtained, and this lack will impact the quality of the X-ray image. To solve this problem, the technology of X-ray multispectrum imaging based on variable energy has advanced...
May 2013: Guang Pu Xue Yu Guang Pu Fen Xi, Guang Pu
Shrestha Sharma, Asgar Ali, Javed Ali, Jasjeet K Sahni, Sanjula Baboota
INTRODUCTION: Natural compounds such as bioflavonoids have found application in health care system due to their wide biological activities, high safety margins and lower cost. Rutin , a polyphenolic bioflavonoid has shown wide range of pharmacological applications due to its significant antioxidant properties. Conventionally, it is used as antimicrobial, antifungal, and antiallergic agent. However, current research has shown its multispectrum pharmacological benefits for the treatment of various chronic diseases such as cancer, diabetes, hypertension and hypercholesterolemia...
August 2013: Expert Opinion on Investigational Drugs
Yong Xu
Pattern recognition techniques have been used to automatically recognize the objects, personal identities, predict the function of protein, the category of the cancer, identify lesion, perform product inspection, and so on. In this paper we propose a novel quaternion-based discriminant method. This method represents and classifies color images in a simple and mathematically tractable way. The proposed method is suitable for a large variety of real-world applications such as color face recognition and classification of the ground target shown in multispectrum remote images...
2012: PloS One
Sheridan C Mayo, Andrew M Tulloh, Adrian Trinchi, Sam Y S Yang
Conventional X-ray microcomputed tomography (micro-CT) is not usually sufficient to determine microscopic compositional distributions as it is limited to measuring the X-ray attenuation of the sample, which for a given dataset can be similar for materials of different composition. In contrast, the present work enables three-dimensional compositional analysis with a data-constrained microstructure (DCM) modeling methodology, which uses two or more CT datasets acquired with different X-ray spectra and incorporates them as model constraints...
June 2012: Microscopy and Microanalysis
Fei Zhang, Tashpolat Tiyip, Jianli Ding, Mamat Sawut, Nigara Tashpolat, Hsiangte Kung, Guihong Han, Dongwei Gui
Aiming at the remote sensing application has been increasingly relying on ground object spectral characteristics. In order to further research the spectral reflectance characteristics in arid area, this study was performed in the typical delta oasis of Weigan and Kuqa rivers located north of Tarim Basin. Data were collected from geo-targets at multiple sites in various field conditions. The spectra data were collected for different soil types including saline-alkaline soil, silt sandy soil, cotton field, and others; vegetations of Alhagi sparsifolia, Phragmites australis, Tamarix, Halostachys caspica, etc...
August 2012: Environmental Monitoring and Assessment
Prosenjit Saha, Sukta Das
Swertia chirata is a plant with bitter taste used since an early date in traditional medical systems of our country for treatment of varied human ailments. In Ayurveda, the plant is used as stomachic, febrifuge, antihelminthic, diuretic as well as for treatment of some types of mental disorders. Experimental revalidation of the medicinal properties of this plant along with chemical analysis of its constituents have generated interest in the medicinal value of Swertia chirata and is likely to open up new avenues for its multispectrum use...
2010: Asian Pacific Journal of Cancer Prevention: APJCP
B N R Subudhi, S Dash, Praveen Subudhi
The acquired immune deficiency syndrome is a lethal multispectrum disease. Ocular manifestations of AIDS occur in 75% of cases when the immunity lowers down to low level with a low CD4 lymphocytic count. Most common manifestation is opportunistic infections. Out of which molluscum contagiosum virus infections with adnexal manifestation are common. Sometime the lesions are confused with other benign infection: Careful history taking, typical clinical findings with diagnostic test detects the underlying disease...
June 2010: Journal of the Indian Medical Association
Anita Shukla, Sareena N Avadhany, Jean C Fang, Paula T Hammond
Local drug delivery methods allow for the opportunity to supply potent multispectrum antibiotics such as vancomycin hydrochloride to sites of infection, while avoiding systemic toxicity. In this work, layer-by-layer assembly of polymer multilayer films is applied to create vancomycin delivery coatings. By taking advantage of the versatile layer-by-layer spray and dip coating techniques, thin films were generated based on electrostatic and other secondary interactions discovered to exist between the film components...
November 5, 2010: Small
Parameswara Rao Vuddanda, Subhashis Chakraborty, Sanjay Singh
IMPORTANCE OF THE FIELD: The use of traditional medicines of natural origin is being encouraged for the treatment of chronic disorders, as synthetic drugs in such cases may cause unpredictable adverse effects. Berberine, a traditional plant alkaloid, is used in Ayurvedic and Chinese medicine for its antimicrobial and antiprotozoal properties. Interestingly, current clinical research on berberine has revealed its various pharmacological properties and multi-spectrum therapeutic applications...
October 2010: Expert Opinion on Investigational Drugs
C Raikes, L L Burpee
ABSTRACT The ability to identify diseases early and quantify severity accurately is crucial in plant disease assessment and management. This study was conducted to assess changes in the spectral reflectance of sunlight from plots of creeping bentgrass during infection by Rhizoctonia solani, the cause of Rhizoctonia blight, and to evaluate multispectral radiometry as a tool to quantify Rhizoctonia blight severity. After inoculation of 6-year-old creeping bentgrass turf with R. solani anastomosis group 2-2, reflectance of sunlight from the foliar canopy was measured at light wavelengths of 460 nm (blue) to 810 nm (near infrared [NIR]), at 50-nm intervals...
May 1998: Phytopathology
Robert Merrifield, Jennifer Keegan, David Firmin, Guang-Zhong Yang
Dual-contrast TrueFISP imaging relies on the use of two RF pulses with different RF flip-angles for enhancing image contrast and performing automatic tissue classification based on multispectrum clustering. The original technique, however, involves an extended imaging time, which limits its clinical application. The purpose of this study is to compare the applicability of two reduced k-space sampling techniques, reduced imaging using generalized series reconstruction (RIGR) and key-hole imaging, for minimizing the imaging time required...
March 2003: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
Xizhi Wang, Gang Wang, Helge Bruelheide, Michael Runge
The landscape surounding Qira osais at the southern fringe of the Taklamakan Desert in China was analyzed by using the SPOT 4 multispectrum remote sensing data and GPS (global positioning system) data. The SPOT 4 scene was projected into an UTM grid, and a supervised classification by ERDAS IMAGINE software was applied. In total, 13 landscape units could be distinguished, and a "frame of reference" was set up for establishing monitoring system of landscape patterns dynamics. Limitations, possible improvements and further applications of the approach were discussed...
September 2002: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
Salman Saeed, Philip J Bos
We review current synthesis techniques for generating and improving birefringent filters. The relationship between wave-plate orientation and the resulting spectral output is shown to be that of a simple Fourier transform. By using this relationship and starting from the fan Solc configuration, we easily generated plate orientations providing lower sidelobe levels and improved finesse. We outline a method by which filters can be constructed to provide from 0 to 100% of the desired passband in a continuous fashion...
November 2002: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
Boussin, Regalia, Plateaux, Barbe
No abstract text is available yet for this article.
October 1998: Journal of Molecular Spectroscopy
Smith, Devi, Benner, Rinsland
High-resolution Fourier transform absorption spectra of ozone broadened by dry air have been recorded at a number of temperatures from -63°C to 29°C. Using a multispectrum nonlinear least-squares procedure, we fit 29 of these spectra simultaneously to determine the air-broadening and shift coefficients and their temperature dependences for 450 lines in the 9-&mgr;m region; most of these belong to the nu1 band. Partial air-broadening results were obtained for 104 additional lines, and room-temperature self-broadening coefficients were also determined for most of the 554 lines measured...
April 1997: Journal of Molecular Spectroscopy
R A Kenley, N W Warne
Recombinant human interleukin 11 (rhIL-11) is a multispectrum cytokine that plays an important role in megakaryocytopoiesis and platelet production. Probing rhIL-11 chemical reactivity in aqueous solution is an important initial step in developing a dosage form for rhIL-11 clinical trials. This report documents rhIL-11 degradation kinetics at 50 degrees C in solutions adjusted to pH 3.0 to 9.5. Stressed samples were analyzed by reverse-phase HPLC and degradation product peaks were isolated for structural characterization...
January 1994: Pharmaceutical Research
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