摘要:
An autoradiographic gene-screening method employing a hybridization process, which comprises:(1) a step of transferring at least a portion of nucleic acids, fragments thereof or derivatives thereof resolved on a medium onto a transfer support to fix them thereonto;(2) a step of hybridizing the nucleic acids, fragments thereof or derivatives thereof fixed onto said transfer support with radioactively labeled probes; and(3) a step of obtaining locational information on the radioactively labeled substances on said transfer support, which comprises placing said transfer support having been subjected to the hybridization and a stimulable phosphor sheet in layers for a given period of time to cause said sheet to absorb at least a portion of radiation energy emitted by the radioactively labeled substances on said transfer support, exciting said stimulable phosphor sheet with an electromagnetic wave to release the radiation energy stored in said sheet as stimulated emission, and detecting the stimulated emission.
摘要:
An autoradiographic gene-screening method employing a hybridization process, which comprises:(1) a step of transferring a portion of genetic clones cultured on a culture medium onto a filter to fix them thereonto;(2) a step of hybridizing the genes of said clones fixed onto said filter with radioactively labeled probes;(3) a step of obtaining two dimensional information on the location of the radioactively labeled substances on the filter which comprises placing said filter having been subjected to the hybridization and a stimulable phosphor sheet in layers for a given period of time to cause said stimulable phosphor sheet to absorb at least a portion of radiation energy emitted by the radioactively labeled substances on the filter, exciting said sheet with an electromagnetic wave to release the radiation energy stored in said sheet as stimulated emission, and detecting the stimulated emission to obtain a locational information on the radioactively labeled substances on the filter; and(4) a step recovering the clones on the culture medium according to the obtained locational information.
摘要:
A stimulable phosphor sheet preferably employable in autoradiography which comprises a substrate, a phosphor layer being provided on the substrate and comprising a stimulable phosphor dispersed in a binder, and a protective layer provided on the phosphor layer, characterized in that the surface of the protective layer is hydrophilic.The surface of the protective layer can be made hydrophilic by hydrophilic processing applied thereto or provision of a hydrophilic layer thereon.
摘要:
An autoradiographic process for obtaining information on one or two dimensional location of radioactively labeled substances contained in a sample selected from the group consisting of tissue of an organism and a medium containing tissue of an organism and/or substances such as DNA originating from an organism,which comprises:placing said sample and a stimulable phosphor sheet having a phosphor layer comprising a stimulable phosphor dispersed in a binder together in layers for a certain period to cause said phosphor sheet to absorb at least a portion of radiation energy emitted by the radioactively labeled substances in said sample;scanning said phosphor sheet with an electromagnetic wave to release at least a portion of radiation energy stored in said phosphor sheet as stimulated emission; anddetecting the stimulated emission to obtain locational information on the radioactively labeled substances in the sample.
摘要:
A signal processing method in autoradiography for determination of the base sequence of DNA or a DNA fragment, employing groups of radioactively labeled base specific cleavage products or mixtures thereof obtained by specifically cleaving the DNA or DNA fragment labeled with a radioactive element and resolved one-dimensionally in parallel relation to each other to form resolved rows on a support medium. An autograph is obtained having locational information on groups of radioactively labeled cleavage products contained in the rows on the support medium. An electrical digital signal corresponding to the autoradiograph is then generated by recording and reproducing from a stimulable phosphor sheet the radiation energy stored therein. Sampling points in each resolved row of the digital signal are next detected. Reference sampling points are then determined in a plurality of reference rows which are either directly provided on the support medium and/or synthesized from certain resolved rows. Sampling points in the remaining non-reference rows are identified by comparison with the continuous lines to thus determine the base sequence of the DNA or DNA fragment.
摘要:
A signal detecting method in autoradiography, which is applied to an autoradiography having locational information on radioactively labeled substances such as radioactively labeled biopolymers distributed one-dimensionally, being recorded on a stimulable phosphor sheet as a radiation energy-stored image, which comprises steps of:(1) preliminarily scanning a part of the stimulable phosphor sheet with an electromagnetic wave to release a portion of the radiation energy as stimulated emission and detecting the stimulated emission to give an electric signal, to which a signal processing is applied, to determine one-dimensional distribution direction of the radioactively labeled substances; and(2) finally scanning the stimulable phosphor sheet with an electromagnetic wave along said one-dimensional distribution direction to release the radiation energy as stimulated emission and detecting the stimulated emission, to obtain the locational information on the radioactively labeled substances as a digital signal.
摘要:
An element for electrophoresis comprising the following three-layer structure laminated in the order:(I) a support layer;(II) an adhesive layer comprising a polymer having at least one specifically selected repeating unit;and(III) a medium layer for electrophoresis comprising an aqueous polyacrylamide gel formed by crosslinking polymerization of an acrylamide compound and a crosslinking agent in the presence of water.
摘要:
A photographic silver halide light-sensitive material having at least one hydrophilic colloid layer containing (a) gelatin and/or a gelatin derivative and (b) at least one compound represented by the following general formula (I) or (II): ##STR1## wherein Y represents a vinyl group; A represents a divalent group; R, which may be the same or different, each represents a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms; and n is 0 or 1. The compounds of the general formulas (I) and (II) are novel class of gelatin hardeners which are particularly suitable for use in silver halide photographic light-sensitive materials.