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Impacts of a collection system on laser-induced breakdown spectroscopy signal detection
Tianqi Li, Sahar Sheta, Zongyu Hou, Jian Dong, Zhe Wang
Published: 18 July 2018 by The Optical Society in Applied Optics
The Optical Society, Volume 57; 10.1364/ao.57.006120
Collecting strong enough and repeatable signals from laser-induced plasmas is the primary goal of laser-induced breakdown spectroscopy optical detection systems. Typically, the light emitted from the plasma is refracted by the lens, collected by the fiber, and measured by the spectrometer. In the present work, we established a three-dimensional model to systematically evaluate the overall emission collected from different positions of the plasma for a typical optical collection system composed of a focus lens and a collection fiber, and sensitivity analyses were further performed. In addition, experiments were conducted and partially validated the model. Results showed that for the collection system with an optical fiber located on the focal point of the collection lens, the collection efficiency distribution is almost constant within a large cylindrical-shaped area, while for that located off the focal point, there is a rhombus-shaped area with higher collection efficiency than other areas. This much higher collection efficiency area is small in size but has a large impact on the detected spectral intensity. The spatially distributed collection efficiency on the lens parameters, such as size and position, was further discussed to clarify the impacts of the collection system. Furthermore, sensitivity analyses were performed to evaluate the impact of the collection system on the signal repeatability. Based on these calculations, recommendations for the design of the collection for optimized spectral intensity and stability were proposed.
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Crystal structure of H108A peptidylglycine alpha-hydroxylating monooxygenase (PHM) soaked with peptide
S. Maheshwari, K. Rudzka, S.B. Gabelli, L.M. Amzel
Published: 18 July 2018 by Protein Data Bank
Protein Data Bank, 10.2210/pdb6ay0/pdb
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Crystal structure of PDE4D2 in complex with inhibitor (S_Zl-n-91)
H. Ke, H. Wang
Published: 18 July 2018 by Protein Data Bank
Protein Data Bank, 10.2210/pdb5wh6/pdb
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Crystal structure of ZmASCH S128A mutant protein from Zymomonas mobilis
S.-Y. Park, J.-S. Kim
Published: 18 July 2018 by Protein Data Bank
Protein Data Bank, 10.2210/pdb5y6c/pdb
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Nucleotide-driven Triple-state Remodeling of the AAA-ATPase Channel in the Activated Human 26S Proteasome
Y. Zhu, W.L. Wang, D. Yu, Q. Ouyang, Y. Lu, Y. Mao
Published: 18 July 2018 by Protein Data Bank
Protein Data Bank, 10.2210/pdb5vfu/pdbx
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Nucleotide-driven Triple-state Remodeling of the AAA-ATPase Channel in the Activated Human 26S Proteasome
Y. Zhu, W.L. Wang, D. Yu, Q. Ouyang, Y. Lu, Y. Mao
Published: 18 July 2018 by Protein Data Bank
Protein Data Bank, 10.2210/pdb5vfo/pdb
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Structure of acryloyl-CoA hydratase AcuH from Roseovarius nubinhibens ISM
Y.Z. Zhang, P. Wang, H.Y. Cao
Published: 18 July 2018 by Protein Data Bank
Protein Data Bank, 10.2210/pdb5xzd/pdb
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Structure of the transmembrane helix of BclxL in phospholipid nanodiscs
F. Hagn, K. Raltchev
Published: 18 July 2018 by Protein Data Bank
Protein Data Bank, 10.2210/pdb6f46/pdb
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Sacbrood virus of honeybee - expansion state I
P. Plevka, M. Prochazkova
Published: 18 July 2018 by Protein Data Bank
Protein Data Bank, 10.2210/pdb6egx/pdb
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Sacbrood virus of honeybee - expansion state II
P. Plevka, M. Prochazkova
Published: 18 July 2018 by Protein Data Bank
Protein Data Bank, 10.2210/pdb6eh1/pdb
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