نتایج جستجو برای: ccd design
تعداد نتایج: 967628 فیلتر نتایج به سال:
In colony collapse disorder (CCD), honey bee colonies inexplicably lose their workers. CCD has resulted in a loss of 50 to 90% of colonies in beekeeping operations across the United States. The observation that irradiated combs from affected colonies can be repopulated with naive bees suggests that infection may contribute to CCD. We used an unbiased metagenomic approach to survey microflora in...
Biodiesel was prepared from Xanthoceras sorbifolium Bunge oil and methanol by transesterification with NaOH as the catalyst. The central composite design (CCD) utilized to optimize its process, Design Expert software applied perform a fitting regression. best process conditions were determined as: 0.9%, molar ratio of 7:1, reaction temperature 62 °C. Under these conditions, yield biodiesel 89.0...
Toxin-antitoxin (TA) systems are widely represented on mobile genetic elements as well as in bacterial chromosomes. TA systems encode a toxin and an antitoxin neutralizing it. We have characterized a homolog of the ccd TA system of the F plasmid (ccd(F)) located in the chromosomal backbone of the pathogenic O157:H7 Escherichia coli strain (ccd(O157)). The ccd(F) and the ccd(O157) systems coexis...
BACKGROUND A longstanding debate in allergy is whether or not specific immunoglobulin-E antibodies (sIgE), recognizing cross-reactive carbohydrate determinants (CCD), are able to elicit clinical symptoms. In pollen and food allergy, ≥20% of patients display in-vitro CCD reactivity based on presence of α1,3-fucose and/or β1,2-xylose residues on N-glycans of plant (xylose/fucose) and insect (fuco...
MEM-FLIM, a CCD imager for use in advanced Fluorescence Lifetime Imaging Microscopy (FLIM) applications is presented. A demodulation frequency of 80MHz is achieved with 4V clock swing with an optimized pixel design. An optional electron-multiplication CCD register using a single-poly electrode structure is included in the imager. Introduction A FLIM system requires an imager that can ‘gate’ the...
Meglumine antimoniate (MA) is a pentavalent antimony (SbV) drug recommended for the treatment of leishmaniasis. It known that trivalent (SbIII) present as residue in MA contributes to side effects. In this article, multivariate optimization was used synthesis order obtain with low levels SbIII. Four variables (source antimony, temperature, water volume and pH) were preliminarily evaluated by 24...
We discuss the design of an inexpensive, high-throughput CCD spectrograph for a small telescope. By using optical fibers to carry the light from the telescope focus to a table-top spectrograph, one can minimize the weight carried by the telescope and simplify the spectrograph design. We recently employed this approach in the construction of IntroSpec, an instrument built for the 16-inch Knowles...
This paper introduces a tow stain detection method based on FPGA. To capture moving images through the line scanning CCD in real time and to design algorithms according to the different characteristics on the tow and stains.Then download it to FPGA development board running and debugging. Finally, displayimages on PC through the video conversion module.The experiments show that this design can ...
Introduction: An advanced brassboard (ADBB) of the Mars Miscrobeam Raman Spectrometer [1,2,3,4] is being developed. The probe (Figure 1) and spectrograph have been redesigned with improved optics and the electronics have been miniaturized. The modified optical design in the probe and spectrograph provides better spectral resolution than the previous model and enables the probe design to be more...
Three line stereo scanners working in push-broom mode are of high interest for future remote sensing camera developments. This contribution deals with some basic considerations concerning the geometric, spectral, and radiometric design of such a camera. These considerations are applied to the design of the Wide-Angle Optoelectronic Stereo Scanner WAOSS for the Russian mission Mars-96 (Bild&Ton,...
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