摘要:
A liquid for removing printing and screen printing inks comprising an essentially anhydrous mixture containing:(a) q-butyrolactone and/or N-methyl-2-pyrrolidone in an amount of 1-25% (v/v);(b) one or more propylene glycol derivatives selected from substituted propyl acetates and/or propylene glycol ethers; and optionally(c) a diluent selected from aliphatic compounds having a flash point above 22.degree. C. and a content of aromatic compounds below 1%; and/or(d) a surfactant, the amount of components (b), (c) and (d) constituting 99-75% (v/v) of the liquid.
摘要:
A liquid for removing printing and screen printing inks consists of an essentially anhydrous mixture of (a) .gamma.-butyrolactone and/or N-methyl-2-pyrrolidone in an amount of up to 25% (v/v) and/or (b) propylene carbonate in an amount of up to 90% (v/v), and (c) up to 90% (v/v) of a high-boiling aromatic compound or a mixture of such compounds having a relative evaporation rate with respect to N-butyl acetate of 0.01 or less. Such a liquid can remove all printing and screen printing inks, and it is considerably less unhealthy than the known cleaning liquids.
摘要:
The invention provides methods and compositions for hybridizing at least one molecule to a target. The invention may, for example, eliminate the use of or reduce the dependence on formamide in hybridization. Compositions for use in the invention include an aqueous composition comprising at least one nucleic acid sequence and at least one polar aprotic solvent in an amount effective to denature double-stranded nucleotide sequences.
摘要:
The invention provides methods and compositions for hybridizing at least one molecule to a target. The invention may, for example, eliminate the use of or reduce the dependence on formamide in hybridization. Compositions for use in the invention include an aqueous composition comprising at least one nucleic acid sequence and at least one polar aprotic solvent in an amount effective to denature double-stranded nucleotide sequences.