DIRECT METHODS AND MACROMOLECULAR CRYSTALLOGRAPHY:LIGH...  CNKI文献

Several papers can be found in literature which describe the application of Direct Methods to macromolecules.Their efficiency is tested both for ab initio phasing and for phase refinement and extensi...

C.Giacovazzo A.Guagliardi... Collected Abstracts of Sixteenth Congress of the Intern... 1993-08-21 国际会议

HOW TO IMPROVE QUARTET ESTIMATES:A SIMPLE STRATEGY  CNKI文献

In some recent papers new attention has been devoted to the role of the quartet invariants in the phasing procedures.The main drawbacks of their use are:the strong correlation with triplet invariants...

C.Giacovazzo M.C.Burla Collected Abstracts of Sixteenth Congress of the Intern... 1993-08-21 国际会议

TRIPLET AND QUARTET RELATIONSHIPS AND THE POSITIVITY P...  CNKI文献

Positivity and atomicity are traditionally considered as basic conditions for direct methods.The origin of this belief traces back to the early theory of inequalities.Latter on it was perceived that ...

A.Altomare C.Giacovazzo... Collected Abstracts of Sixteenth Congress of the Intern... 1993-08-21 国际会议

SIR92:A POWERFUL DIRECT METHODS PACKAGE  CNKI文献

SIR92 is the powerful heir of SIR88(M.C. Burla,M.Camalli,G.Cascarano,C.Giacovazzo, G.Polidori,R.Spagna and D.Viterbo,J.Appl. Cryst.,1989,22,389-393) has shown to be a powerful tool to solve complex s...

A.Altomare G.Cascarano... Collected Abstracts of Sixteenth Congress of the Intern... 1993-08-21 国际会议

INTEGRATION OF PATTERSON AND DIRECT METHODS:ABOUT THE ...  CNKI文献

In some recent papers(C.Giacovazzo,Acta Cryst.,1991,A47-256-263;A.Altomare,G. Cascarano & C.Giacovazzo,Acta Cryst,1992a,b, A48,30-36,495-500)probabilistic formulas were obtained which estimate tr...

A.Altomare C.