Global Structure-Acute Toxicity Relationships for Mice Using Structural Parameter Ratios: New Approach to Molecular Design and Screening

1995 ◽  
Vol 3 (1) ◽  
pp. 15-26 ◽  
Author(s):  
K. Yano
Keyword(s):  
Acute Toxicity ◽  
Molecular Design ◽  
Global Structure ◽  
Structural Parameter ◽  
New Approach

Linear and Non-Linear Optical Properties of (2-Cyano-5-Methoxy-1,4-Phenylenevinylene) and Paraphenylenevinylene Copolymers

1992 ◽  
Vol 277 ◽  
Author(s):  
Jang-Joo Kim ◽  
Do-Hoon Hwang ◽  
Shin-Woong Kang ◽  
Hong-Ku Shim
Keyword(s):  
Optical Properties ◽  
Molecular Design ◽  
Water Soluble ◽  
New Approach ◽  
Electro Optic ◽  
Precursor Polymers ◽  
Non Linear ◽  
Linear Optical Properties ◽  
Precursor Route ◽  
Linear Optical

ABSTRACTPoly(CMPV-co-PV) have been synthesized via water soluble sulfonium salt precursor route and their linear and non-linear optical properties were characterized. The electro-optic response was stable up to 100°C when the materials were poled during the elimination. The thermal stability and mechanical strength of PPV and its derivatives, and easy processibility from the precursor polymers suggest a new approach for the molecular design of the 2nd order non-linear optical polymers.

Molecular design and QSAR study of low acute toxicity biocides with 4,4′-dimorpholyl-methane core obtained by microwave-assisted synthesis

2010 ◽  
Vol 12 (6) ◽  
pp. 1036 ◽  
Author(s):  
Raúl Hernández-Altamirano ◽  
Violeta Y. Mena-Cervantes ◽  
Sandra Perez-Miranda ◽  
Francisco J. Fernández ◽  
Cesar Andres Flores-Sandoval ◽  
...  
Keyword(s):  
Acute Toxicity ◽  
Molecular Design ◽  
Microwave Assisted Synthesis ◽  
Qsar Study ◽  
Microwave Assisted

TOPOLOGICAL PEELING AND APPLICATIONS

2003 ◽  
Vol 13 (02) ◽  
pp. 135-172 ◽  
Author(s):  
DANNY Z. CHEN ◽  
SHUANG LUAN ◽  
JINHUI XU
Keyword(s):  
Execution Time ◽  
Shortest Paths ◽  
Global Structure ◽  
Single Source ◽  
Convex Region ◽  
Special Shape ◽  
New Approach ◽  
Local Structures ◽  
Different Types ◽  
Number Of Cells

We present a new approach, called topological peeling, for traversing a portion AR of the arrangement formed by n lines within a convex region R on the plane. Topological peeling visits the cells of AR in a fashion of propagating a "wave" of a special shape (called a double-wriggle curve) starting at a single source point. This special traversal fashion enables us to solve several problems (e.g., computing shortest paths) on planar arrangements to which previously best known arrangement traversal techniques such as topological sweep and topological walk may not be directly applicable. Our topological peeling algorithm takes O(K + n log (n + r)) time and O(n + r) space, where K is the number of cells in AR and r is the number of boundary vertices of R. Comparing with topological walk, topological peeling uses a simpler and more efficient way to sweep different types of lines, and relies heavily on exploring small local structures, rather than a much larger global structure. Experiments show that, on average, topological peeling outperforms topological walk by 10–25% in execution time.

scholarly journals New approach to calculating tree height at the regional scale

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Congrong Li ◽  
Jinling Song ◽  
Jindi Wang
Keyword(s):  
Spatial Resolution ◽  
Forest Canopy ◽  
Structural Parameters ◽  
Regional Scale ◽  
Canopy Structure ◽  
Tree Height ◽  
Structural Parameter ◽  
Variance Model ◽  
New Approach ◽  
The Difference

Abstract Background Determining the spatial distribution of tree heights at the regional area scale is significant when performing forest above-ground biomass estimates in forest resource management research. The geometric-optical mutual shadowing (GOMS) model can be used to invert the forest canopy structural parameters at the regional scale. However, this method can obtain only the ratios among the horizontal canopy diameter (CD), tree height, clear height, and vertical CD. In this paper, we used a semi-variance model to calculate the CD using high spatial resolution images and expanded this method to the regional scale. We then combined the CD results with the forest canopy structural parameter inversion results from the GOMS model to calculate tree heights at the regional scale. Results The semi-variance model can be used to calculate the CD at the regional scale that closely matches (mainly with in a range from − 1 to 1 m) the CD derived from the canopy height model (CHM) data. The difference between tree heights calculated by the GOMS model and the tree heights derived from the CHM data was small, with a root mean square error (RMSE) of 1.96 for a 500-m area with high fractional vegetation cover (FVC) (i.e., forest area coverage index values greater than 0.8). Both the inaccuracy of the tree height derived from the CHM data and the unmatched spatial resolution of different datasets will influence the accuracy of the inverted tree height. And the error caused by the unmatched spatial resolution is small in dense forest. Conclusions The semi-variance model can be used to calculate the CD at the regional scale, together with the canopy structure parameters inverted by the GOMS model, the mean tree height at the regional scale can be obtained. Our study provides a new approach for calculating tree height and provides further directions for the application of the GOMS model.

ChemInform Abstract: Molecular Design and QSAR Study of Low Acute Toxicity Biocides with 4,4′-Dimorpholyl-methane Core Obtained by Microwave-Assisted Synthesis.

ChemInform ◽  
2010 ◽  
Vol 41 (43) ◽  
pp. no-no
Author(s):  
Raul Hernandez-Altamirano ◽  
Violeta Y. Mena-Cervantes ◽  
Sandra Perez-Miranda ◽  
Francisco J. Fernandez ◽  
Cesar Andres Flores-Sandoval ◽  
...  
Keyword(s):  
Acute Toxicity ◽  
Molecular Design ◽  
Microwave Assisted Synthesis ◽  
Qsar Study ◽  
Microwave Assisted
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