Abstract: A method for imaging a material to atomic scale by means of a field-ion microscope having a vacuum chamber configured to accommodate the material prepared in the form of a tip and an imaging gas, and an ion detector is provided. The method includes application of a DC electrical potential (VDC) and of a pulsed electrical potential, of which the maximum pulse value is denoted Vimp, so that the tip erodes for a potential value equal to VDC+Vimp; acquisition, by the detector between at least two pulses of the pulsed potential, of series of at least two ion images of the impacts of the ions repelled by the tip onto the detector; and calculation of a quantity characteristic of a trend of the erosion of the tip based on the series of ion images acquired and the adjustment, between each series of images, of the values of VDC and of Vimp such that the quantity characteristic of the trend and the ratio VDC/Vimp remain constant.

Abstract: This invention relates to 1,2,4-triazine derivatives, processes for their preparation, pharmaceutical compositions, and their use in treating viral infections.

Abstract: The invention concerns a gem-difluorinated C-glycopeptide compound of formula (I) in which N is an integer between 1 and 5, R4=H, AA1, AA1-AA2 and R5=OH, AA1, AA1, AA2, with AA1, and AA2 are independents groups and represent amino acids with a non-functionalized side chain and R1, R2, R3 are independent groups and one of them is equal to formula (II), in which n is an integer between 3 and 4, Y, Y? are independent groups in which Y, Y?=H, OR, N3, NR?R?, SR??, where R=H, benzyl, trimethylsilyl, tert-butyldimethylsilyl, tert-butyldiphenylsilyl, acetate group, R?, R???H, alkyl, allyl, benzyl, tosylate group, C(?O)-alkyl, C(?O)?Bn, R??=H, alkyl, acetate group, R6 is notably a group H, CH3, CH2OH, CH2-Glycoside group, CH2-OGP in which GP is a protector group such as an alkyl, benzyl, trimethylsilyl, tert-butyldimethylsilyl, tertbutyldiphenylsilyl, acetate group,; and R7=OH, OGP?, NH2, N3, NHGP?, NGP?GP? in which GP? and GP? is or not a protector group such as an alkyl, benzyl, trimethylsilyl, tertbutyldimethyl

Abstract: The invention relates to a gem-difluoride glycoconjugated compound with formula (I): where R represents II or a benzyl, acetyl, benzoyl alkyl group, R1 and R2 may be identical or different and represent H or an alkyl, benzyl, benzoyl, acetyl, pivaloyl, trialkylsilyl, tertiobutyldiphenylsilyl protective group or an acetal group of the CR?R? type, where R? and R? may be identical or different and represent H or an alkyl, aryl, benzyl or thiophene group, R3 represents H or an alkyl, benzyl, benzoyl, acetyl, pivaloyl, trialkylsilyl or tertiobutyldiphenylsilyl protective group, R4 represents OR?, NGR?GR?, N3, or a phthalimide, where R? represents H or an alkyl, benzyl, benzoyl, acetyl, pivaloyl, trialkylsilyl or tertiobutyldiphenylsilyl protective group, GR? and GR? may be identical or different and represent II or an alkyl, benzyl, benzoyl, acetyl, alkyloxycarbonyl, allyloxycarbonyl or benzyloxycarbonyl group, R5 represents a free or protected hydroxyl group or a halogen, R6 represents H or an alkyl, acetyl, benz

Abstract: The invention concerns a gem-difluorinated C-glycopeptide compound of formula (I) in which N is an integer between 1 and 5, R4=H, AA1, AA1-AA2 and R5=OH, AA1, AA1.AA2, with AA1, and AA2 are independents and representing amino acids with a non functionalised side chain and R1, R2, R3 are independent groups and one of them is egal to formula (II), in which n is an integer between 3 and 4, Y, Y? are independent groups in which Y, Y?=H, OR, N3, NR?R?, SR??, where R=H, benzyl, trimethylsilyl, tert-butyldimethylsilyl, tert-butyldiphenylsilyl, acetate group, R?, R?=H, alkyl, allyl, benzyl, tosylate group, C(?O) alkyl, C(?O)Bn.

Abstract: The invention relates to a gem-difluoride C-glycopeptide compound with formula I where n is an integer equal to 3 or 4, R represents a hydrogen atom, an alkyl, benzyl, acetyl, trimethylsilyl, tert-butyldimethylsilyl, tert-butyldiphenylsilyl group, R? represents OR, NR?R?, N3, or a phthalimide, R? and R? represent a hydrogen atom or an alkyl, aryl, benzyl, benzoyl, acetyl, alkyloxycarbonyl, allyloxycarbonyl, benzyloxycarbonyl group, R1 represents a hydrogen atom or an alkyl, benzyl, alkylcarbamate, allylcarbamate, benzylcarbamate, acetyl group, R1 may consist of an amino acid if R2 represents only OR, R2 includes an amino acid if R1 represents a hydrogen atom or an alkyl, benzyl, alkylcarbamate, allylcarbamate, benzylcarbamate, acetyl group, R2 represents OR when R1 represents an amino acid, R3 represents a hydrogen atom or a free or protected alcohol function.