نتایج جستجو برای: quaternary prevention

تعداد نتایج: 241316  

2010
Savvas Ioannou Athanassios V. Nicolaides Manolis J. Manos

The crystal structure of the title compound, C(11)H(18)O(6)S(2), was determined to investigate the effect of the eclipsed mesyl groups on the bond length of the vicinal quaternary C atoms. The two quaternary C atoms of the noradamantane skeleton and the two O atoms to which they are connected all located essentially in the same plane [maximum deviation 0.01 Å], resulting in an eclipsing conform...

2015
Shweta Hajare

Multiple Valued Logic (MVL) has some important benefits such as increased data density, increased computational ability, reduced dynamic power dissipation Therefore with the help of Multiple Valued Logic (MVL) we have designed two quaternary multiplier architecture. The partial products in the multiplier are designed with quaternary voltage mode circuits. Each multiplier architecture is designe...

2012
Savvas Ioannou Eleni Moushi

The crystal structure of the title compound, C(9)H(12)O(4)S, was determined in order to investigate the effect of the eclipsed O atoms on the bond length of the vicinal quaternary C atoms. The two quaternary C atoms of the noradamantane skeleton and the two O atoms to which they are connected all located essentially in the same plane (maximum deviation = 0.01 Å), resulting in an eclipsed confor...

Journal: :European journal of organic chemistry 2013
Allen Y Hong Brian M Stoltz

All-carbon quaternary stereocenters have posed significant challenges in the synthesis of complex natural products. These important structural motifs have inspired the development of broadly applicable palladium-catalyzed asymmetric allylic alkylation reactions of unstabilized non-biased enolates for the synthesis of enantioenriched α-quaternary products. This microreview outlines key considera...

Journal: :CoRR 2010
K. S. Vasundara Patel K. S. Gurumurthy

This paper presents arithmetic operations like addition, subtraction and multiplications in Modulo-4 arithmetic, and also addition, multiplication in Galois field, using multi-valued logic (MVL). Quaternary to binary and binary to quaternary converters are designed using down literal circuits. Negation in modular arithmetic is designed with only one gate. Logic design of each operation is achie...

Journal: :IEEE Trans. Information Theory 2009
Jaume Pujol Josep Rifà Faina I. Solov'eva

New quaternary Plotkin constructions are given and are used to obtain new families of quaternary codes. The parameters of the obtained codes, such as the length, the dimension and the minimum distance are studied. Using these constructions new families of quaternary Reed-Muller codes are built with the peculiarity that after using the Gray map the obtained Z4-linear codes have the same paramete...

2016
Ming Su Arne Winterhof

In analogy to the corresponding measures of pseudorandomness for quaternary sequences introduced by Mauduit and Sárközy (for m-ary sequences) we introduce the well-distribution measure and correlation measure of order k for sequences over F4. Using any fixed bijection from F4 to the set of complex fourth roots of unity, we analyze the relation of these pseudorandomness measures for sequences ov...

Journal: :Angewandte Chemie 2014
Jack L-Y Chen Varinder K Aggarwal

3,3-Disubstituted allylic boronic esters are not sufficiently reactive to react with ketones and imines. However, they can be converted into the corresponding borinic esters by the sequential addition of nBuLi and TFAA. These reactive intermediates possess the perfect balance between reactivity and configurational stability. Their enhanced reactivity allows the highly selective allylation of bo...

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