scholarly journals Understanding benzyl alcohol aggregation by chiral modification: the pairing step

2020 ◽  
Vol 22 (44) ◽  
pp. 25538-25551
Author(s):  
Robert Medel ◽  
Martin A. Suhm
Keyword(s):  
Benzyl Alcohol ◽  
Global Minimum ◽  
Chiral Modification

Depending on how two enantiomeric benzyl alcohol molecules meet, they either get stuck in a symmetric heterochiral dimer or they synchronize their transient chirality to reach the global minimum structure.

Properties of the beta coefficient of the global minimum variance portfolio

2020 ◽  
Vol 8 (1) ◽  
pp. 11-21
Author(s):  
S. M. Yaroshko ◽  
◽  
M. V. Zabolotskyy ◽  
T. M. Zabolotskyy ◽  
◽  
...  
Keyword(s):  
Confidence Interval ◽  
Asymptotic Distribution ◽  
Global Minimum ◽  
Asset Returns ◽  
Minimum Variance ◽  
Benchmark Portfolio ◽  
Beta Coefficient ◽  
Minimum Variance Portfolio ◽  
Global Minimum Variance Portfolio ◽  
Daily Returns

The paper is devoted to the investigation of statistical properties of the sample estimator of the beta coefficient in the case when the weights of benchmark portfolio are constant and for the target portfolio, the global minimum variance portfolio is taken. We provide the asymptotic distribution of the sample estimator of the beta coefficient assuming that the asset returns are multivariate normally distributed. Based on the asymptotic distribution we construct the confidence interval for the beta coefficient. We use the daily returns on the assets included in the DAX index for the period from 01.01.2018 to 30.09.2019 to compare empirical and asymptotic means, variances and densities of the standardized estimator for the beta coefficient. We obtain that the bias of the sample estimator converges to zero very slowly for a large number of assets in the portfolio. We present the adjusted estimator of the beta coefficient for which convergence of the empirical variances to the asymptotic ones is not significantly slower than for a sample estimator but the bias of the adjusted estimator is significantly smaller.

Selective Oxidation of Benzyl Alcohol Catalyzed by Pd/PMO-SBA-15 Catalyst

2011 ◽  
Vol 31 (11) ◽  
pp. 1369-1373
Author(s):  
Cheng LIU ◽  
Rong TAN ◽  
Donghong YIN ◽  
Ningya YU ◽  
Yuxu ZHOU
Keyword(s):  
Benzyl Alcohol ◽  
Selective Oxidation ◽  
Oxidation Of Benzyl Alcohol

Researching nitrogen solubility in nitrogen-containing austenitic steels at melting and recrystallization by CALPHAD method

2019 ◽  
pp. 53-66 ◽  
Author(s):  
L. A. Smirnov ◽  
I. I. Gorbachev ◽  
V. V. Popov ◽  
A. Yu. Pasynkov ◽  
A. S. Oryshchenko ◽  
...  
Keyword(s):  
Global Minimum ◽  
Nitrogen Solubility ◽  
Thermodynamic Description ◽  
Solidus Temperature ◽  
Liquidus Line ◽  
Calphad Method ◽  
Austenitic Steels ◽  
Nitrogen Transfer ◽  
Fixed Nitrogen ◽  
System Phase

The CALPHAD method has been employed to compose thermodynamic description of the Fe–Cr–Mn–Ni–Si–C–N system. Using an algorithm based on finding a global minimum of Gibbs energy, the calculations of system phase composition were performed in the temperature range from 1750°C to hardening and in the range of compositions corresponding to 04Kh20N6G11M2AFB steel. Calculations showed that at temperatures above liquidus line, Cr and Mn increase nitrogen solubility in the melt, while Ni and Si reduce it. With an increase in the content of Cr, Mn, Ni, and Si in steel in the studied composition range, both liquidus and solidus temperature decrease. The degree of influence on these temperatures of Cr, Mn, Ni and Si within the steel grade is different and ranges from ~3 to ~14°C. Calculations taking into account the possibility of nitrogen transfer between steel and the atmosphere of air showed that the amount of fixed nitrogen in the alloy under study varies, depending on the composition of the steel and temperature, from ~0.3 to ~0.6 wt%. As the temperature decreases from liquidus to solidus, the amount of fixed nitrogen increases, with the exception of those steel compositions when ferrite and not austenite is released from the liquid phase.

Experimental and kinetic modeling study of benzyl alcohol pyrolysis

2021 ◽  
Vol 231 ◽  
pp. 111477
Author(s):  
Jin-Tao Chen ◽  
Zhi-Hao Jin ◽  
Wang Li ◽  
Kai-Ru Jin ◽  
Shu-Bao Song ◽  
...  
Keyword(s):  
Benzyl Alcohol ◽  
Kinetic Modeling ◽  
Modeling Study

scholarly journals Metal-free porous phosphorus-doped g-C3N4 photocatalyst achieving efficient synthesis of benzoin

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12682-12686
Author(s):  
Yuanjin Li ◽  
Shuhui Wang ◽  
Jin Wu ◽  
Qiuyan Wang ◽  
Changqiu Ma ◽  
...  
Keyword(s):  
Benzyl Alcohol ◽  
Conversion Rate ◽  
Oxygen Activation ◽  
Superoxide Radicals ◽  
Efficient Synthesis ◽  
Metal Free ◽  
Phosphorus Doped

Porous phosphorus-doped g-C3N4 (PCNT) has intensive oxygen activation ability to generate superoxide radicals, and can efficiently catalyze synthesis of benzoin from benzyl alcohol, with conversion rate and selectivity near to 100%.

Monodisperse-porous cerium oxide microspheres as a new support with appreciable catalytic activity for a composite catalyst in benzyl alcohol oxidation

2021 ◽  
Author(s):  
Kadriye Özlem Hamaloğlu ◽  
Rukiye Babacan Tosun ◽  
Serap Ulu ◽  
Hakan Kayi ◽  
Cengiz Kavaklı ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Benzyl Alcohol ◽  
Cerium Oxide ◽  
Sol Gel ◽  
Alcohol Oxidation ◽  
Pd Nanoparticles ◽  
Composite Catalyst ◽  
Benzyl Alcohol Oxidation ◽  
Supported Pd

A synergistic catalyst in the form of monodisperse-porous CeO2 microspheres supported Pd nanoparticles (Pd NPs) was synthesized. CeO2 microspheres 4 μm in size were obtained by a newly developed “sol-gel...

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