Parainfluenza 1/2/3 IgM ELISA Kit (DEIA371)

Regulatory status: For research use only, not for use in diagnostic procedures.

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serum, plasma
Species Reactivity
Intended Use
The Parainfluenza 1/2/3 IgM antibody ELISA kit has been designed for the detection and the quantitative determination of specific IgM antibodies against Parainfluenza 1/2/3 in serum and plasma.
Contents of Kit
1. Microtiter Strips
2. Calibrator A(Negative Control)
3. Calibrator B(Cut-Off Standard)
4. Calibrator C(Weak positive Control)
5. Calibrator D(Positive Control)
6. Enzyme Conjugate
7. Substrate
8. Stop Solution
9. Sample Diluent
10. Washing Buffer
11. Plastic Foils
For more detailed information, please download the following document on our website.
Intra-assay-Precision: 5.4%
Inter-assay-Precision: 7.7%
Inter-Lot-Precision: 2.9-8.0%
1.04 U/mL


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Insights into leading edge vortex formation and detachment on a pitching and plunging flat plate


Authors: Kissing, Johannes; Kriegseis, Jochen; Li, Zhenyao; Feng, Lihao; Hussong, Jeanette; Tropea, Cameron

The present study is a prelude to applying different flow control devices on pitching and plunging airfoils with the intention of controlling the growth of the leading edge vortex (LEV); hence, the lift under unsteady stall conditions. As a pre-requisite the parameters influencing the development of the LEV topology must be fully understood and this constitutes the main motivation of the present experimental investigation. The aims of this study are twofold. First, an approach is introduced to validate the comparability between flow fields and LEV characteristics of two different facilities using water and air as working media by making use of a common baseline case. The motivation behind this comparison is that with two facilities the overall parameter range can be significantly expanded. This comparison includes an overview of the respective parameter ranges, control of the airfoil kinematics and careful scrutiny of how post-processing procedures of velocity data from time-resolved particle image velocimetry (PIV) influence the integral properties and topological features used to characterise the LEV development. Second, and based on results coming from both facilities, the appearance of secondary structures and their effect on LEV detachment over an extended parameter range is studied. A Lagrangian flow field analysis based on finite-time Lyapunov Exponent (FTLE) ridges allows precise identification of secondary structures and reveals that their emergence is closely correlated to a vortex Reynolds number threshold computed from the LEV circulation. This threshold is used to model the temporal onset of secondary structures. Further analysis indicates that the emergence of secondary structures causes the LEV to stop accumulating circulation if the shear layer angle at the leading edge of the flat plate has ceased to increase. This information is of particular importance for advanced flow control applications, since efforts to strengthen and/or prolong LEV growth rely on precise knowledge about where and when to apply flow control measures. [GRAPHICS] .

Free-stream turbulence interaction with a wing-tip vortex


Authors: Ben Miloud, Kamal; Dghim, Marouen; Fellouah, Hachimi; Ferchichi, Mohsen

The interaction of a wing-tip vortex of a rectangular, square-tipped wing having a NACA 0012 airfoil section with a grid-generated turbulent flow was investigated in this paper. The experiments were conducted in the near and mid-wake regions at three free stream turbulence (FST) intensities of 0.5%, 3% and 6%, and at two Reynolds numbers, Re, based on the wing chord length, c(w), of 2 x 10(5) and 3 x 10(5). Stereoscopic Particle Image Velocimetry (SPIV) and hot-wire measurements were carried out at four downstream positions, namely x/c(w) = 1.25, 3.25, 6.25 and 7.75. Streamwise velocity contours showed that the wing-tip vortex decayed with increased FST and downstream distance. In the vortex core region, the streamwise velocity decelerated while the vortex adopted a wake-like profile. FST was found to decrease the vortex circulation and to increase the vortex radius and vortex meandering amplitude. When increasing Reynolds number, the grid cases showed little variation of the vortex radius and peak vorticity levels, particularly at larger downstream positions, suggesting that the effects of FST and Re number on the vortex development are nearly independent. The measured total turbulent kinetic energy (TKE) was found to be mostly due to vortex meandering. In that, total TKE levels devoid of meandering showed a virtually turbulence-free vortex core.

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