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141.
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Stempler S Levy-Sakin M Frydman-Marom A Amir Y Scherzer-Attali R Buzhansky L Gazit E Senderowitz H 《Journal of computer-aided molecular design》2011,25(2):135-144
Inhibiting the aggregation process of the β-amyloid peptide is a promising strategy in treating Alzheimer’s disease. In this
work, we have collected a dataset of 80 small molecules with known inhibition levels and utilized them to develop two comprehensive
quantitative structure–activity relationship models: a Bayesian model and a decision tree model. These models have exhibited
high predictive accuracy: 87% of the training and test sets using the Bayesian model and 89 and 93% of the training and test
sets, respectively, by the decision tree model. Subsequently these models were used to predict the activities of several new
potential β-amyloid aggregation inhibitors and these predictions were indeed validated by in vitro experiments. Key chemical
features correlated with the inhibition ability were identified. These include the electro-topological state of carbonyl groups,
AlogP and the number of hydrogen bond donor groups. The results demonstrate the feasibility of the developed models as tools
for rapid screening, which could help in the design of novel potential drug candidates for Alzheimer’s disease. 相似文献
144.
Noble-gas hydrides such as HXeCCH are prepared in cryogenic noble-gas matrices where they are stable. Molecular dynamics simulations reported here predict that HXeCCH is chemically stable in clusters of acetylene, and that stability prevails for temperatures of at least 150 K, at which the clusters are liquid-like. The HXeCCH(C(2)H(2))(n) clusters are studied for sizes up to n = 7. Ab Initio Molecular Dynamics trajectories of 10 ps duration are computed using BLYP-D DFT potential. The liquid-like nature of the system at 150 K is reflected in large amplitude motion of intermolecular distances and orientations. In addition, structures, energetics, NBO charges and bonding analysis at equilibrium are also reported. Complexation is found to be energetically favorable, and to increase the stability of the HXeCCH molecule. The significance of the existence of stable liquid-like complexes of noble-gas hydrides is discussed. 相似文献
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146.
A characterization is obtained of the Zariski topology over an algebraically closed field.
147.
148.
We introduce the concept of ɛ-consistent equilibrium where each player plays a ɛ-best response after every history reached
with positive probability. In particular, an ɛ-consistent equilibrium induces an ɛ-equilibrium in any subgame reached along
the play path. The existence of ɛ-consistent equilibrium is examined in various repeated games. The main result is the existence
in stochastic games with absorbing states.
Received January 1995/Revised version October 1996/Final version September 1997 相似文献
149.
In a fuzzy cooperative game the players may choose to partially participate in a coalition. A fuzzy coalition consists of
a group of participating players along with their participation level. The characteristic function of a fuzzy game specifies
the worth of each such coalition. This paper introduces well-known properties of classical cooperative games to the theory
of fuzzy games, and studies their interrelations. It deals with convex games, exact games, games with a large core, extendable
games and games with a stable core. 相似文献
150.