ChemInform Abstract: NOVEL METHOD FOR THE PREPARATION OF SPIN-LABELED DERIVATIVES OF PENTAVALENT PHOSPHORUS COMPOUNDS

1976 ◽  
Vol 7 (4) ◽  
pp. no-no
Author(s):  
G. SOSNOVSKY ◽  
M. KONIECZNY
Keyword(s):  
Phosphorus Compounds ◽  
Pentavalent Phosphorus ◽  
Novel Method ◽  
Derivatives Of

TIME-TO-CONTACT INFORMATION ESTIMATION FOR MONOCULAR MOBILE ROBOTS

2008 ◽  
Vol 05 (03) ◽  
pp. 223-233 ◽  
Author(s):  
RONG LIU ◽  
MAX Q. H. MENG
Keyword(s):  
Mobile Robots ◽  
Optical Flow ◽  
Active Contour Model ◽  
Visual Navigation ◽  
Moving Object ◽  
Time To Contact ◽  
Temporal Derivative ◽  
Novel Method ◽  
Derivatives Of ◽  
Flow Experiments

Time-to-contact (TTC) provides vital information for obstacle avoidance and for the visual navigation of a robot. In this paper, we present a novel method to estimate the TTC information of a moving object for monocular mobile robots. In specific, the contour of the moving object is extracted first using an active contour model; then the height of the motion contour and its temporal derivative are evaluated to generate the desired TTC estimates. Compared with conventional techniques employing the first-order derivatives of optical flow, the proposed estimator is less prone to errors of optical flow. Experiments using real-world images are conducted and the results demonstrate that the developed method can successfully achieve TTC with an average relative error (ARVE) of 0.039 with a single calibrated camera.

scholarly journals New approach in the application of lignin for the synthesis of hybrid materials

2017 ◽  
Vol 89 (1) ◽  
pp. 161-171 ◽  
Author(s):  
Beata Podkościelna ◽  
Marta Goliszek ◽  
Olena Sevastyanova
Keyword(s):  
Suspension Polymerization ◽  
Nitrogen Adsorption ◽  
Experimental Protocol ◽  
New Approach ◽  
Surface Areas ◽  
Adsorption Data ◽  
Novel Method ◽  
Derivatives Of ◽  
Polymerization Method ◽  
Nitrogen Adsorption Data

AbstractIn this study, a novel method for the synthesis of hybrid, porous microspheres, including divinylbenzene (DVB), triethoxyvinylsilane (TEVS) and methacrylated lignin (L-Met), is presented. The methacrylic derivatives of kraft lignin were obtained by reaction with methacryloyl chloride according to a new experimental protocol. The course of the modification of lignin was confirmed by attenuated total reflectance (ATR-FTIR) and nuclear magnetic resonance (NMR) spectroscopy. The emulsion-suspension polymerization method was employed to obtain copolymers of DVD, TEVS and L-Met in spherical forms. The porous structures and morphologies of the obtained lignin-containing functionalized microspheres were investigated by low-temperature nitrogen adsorption data and scanning electron microscopy (SEM). The microspheres are demonstrated to be mesoporous materials with specific surface areas in the range of 430–520 m2/g. The effects of the lignin component on the porous structure, shape, swelling and thermal properties of the microspheres were evaluated.

A Novel Method for the Synthesis of Formyl and Hydroxymethyl Derivatives of 4H-Pyran-4-one.

ChemInform ◽  
2003 ◽  
Vol 34 (2) ◽  
Author(s):  
M. Ghandi ◽  
Y. Bayat ◽  
R. Teimuri-mofrad
Keyword(s):  
Novel Method ◽  
Derivatives Of

Synthesis of Arylenephosphamacrocycles Using Tri- and Pentavalent Phosphorus Compounds

ChemInform ◽  
2007 ◽  
Vol 38 (37) ◽  
Author(s):  
E. E. Nifantyev ◽  
P. V. Slitikov ◽  
E. N. Rasadkina
Keyword(s):  
Phosphorus Compounds ◽  
Pentavalent Phosphorus

Reaction of Trivalent Organophosphorus Compounds with Selenium

1978 ◽  
Vol 33 (9) ◽  
pp. 1040-1046 ◽  
Author(s):  
Maria Konieczny ◽  
George Sosnovsky
Keyword(s):  
Room Temperature ◽  
Organophosphorus Compounds ◽  
Phosphorus Compounds ◽  
Trivalent Phosphorus ◽  
Derivatives Of

Selenium derivatives of pentavalent organophosphorus compounds 9, 10, 11 (Ṙ = 2,2,6,6- tetramethyl-1-oxyl-4-piperidyl), 12 and 13 were prepared in 79-99%yields via the reaction of the corresponding trivalent phosphorus compounds 14, 15, 16, 17, 18 with blackselenium in benzene at room temperature in 20 hours.

scholarly journals The Synthesis of the Locating Substitution Derivatives of Chitosan by Click Reaction at the 6-Position of Chitin

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Yu Chen ◽  
Yanchun Ye ◽  
Yanyan Jing ◽  
YuanYuan Gao ◽  
Yanwen Guo ◽  
...  
Keyword(s):  
Nucleophilic Substitution ◽  
High Efficiency ◽  
Click Reaction ◽  
Macrocyclic Compound ◽  
Optimum Conditions ◽  
Structures And Properties ◽  
Acetyl Group ◽  
Novel Method ◽  
Derivatives Of

A novel method to prepare the macrocyclic compound locating substitution derivatives of chitosan was investigated, by using cyclodextrin as the model of macrocyclic compound. The method combines the advantages of activated 6-OH of chitin and high efficiency of click reaction. Chitin C6-OHp-toluenesulfonate (CTN-6-OTs) was generated and subsequently transferred to chitin C6-N3via nucleophilic substitution. Afterwards,β-cyclodextrin was immobilized at 6-OH of chitin via click reaction to afford CTN-6-CD. Ultimately, CTS-6-CD was obtained by removing the acetyl group of chitin unit. The structures and properties of these products were characterized by FTIR, TG, and XRD, respectively. It was found that CTN-6-CD synthesized at the optimum conditions has an immobilized loading of1.6126×10-4 mol/g and that of the corresponding CTS-6-CD, generated by removal of the acetyl group, was1.6891×10-4 mol/g.

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