A recording medium having two outer sheets (1, 3) forming a pocket, and an extractable intermediate sheet (5) lying in between, the latter producing a recording contrast in a recording action and being removed from the pocket after noting, there further being provided between the outer sheets a sticky area (17), which does not stick to the intermediate sheet but to the opposite sides of the outer sheets (1 and 3), in order to prevent an impairment of the noting by the sticky area (17) provided, ...

A separation medium useful as an adsorbent of liquid chromatography for optical resolution of racemic mixtures is disclosed, which comprises a reversed phase support coated with an optically active amino acid derivative represented by formula (I): ##STR1## wherein R.sub.1 represents a straight or branched alkyl group having from 1 to 3 carbon atoms; and R.sub.2 and R.sub.3 each represents a straight or branched alkyl group having from 4 to 12 carbon atoms which may contain an aromatic group or a...

A recording medium having a base and a recording layer provided on said base, said recording layer consisting essentially of a thermotropic cholesteric liquid crystalline glutamate copolymer represented by the following general formula: ##STR1## wherein R.sub.1 is an alkyl, cycloalkyl, aryl or arylalkyl group having not more than 10 carbon atoms, R.sub.2 is an alkyl, cycloalkyl, aryl or arylalkyl group having 6 to 30 carbon atoms, provided R.sub.1 and R.sub.2 are not the same, and m and n are in...

A transfer medium for use in a printing apparatus wherein a magnetic ink layer containing magnetic particles is heat-melted and transferred to a material to be printed. The magnetic ink layer (12) contains magnetic particles (121) and (122) different from each other in size, which enables printing to be conducted with excellent quality.

The disclosure relates to an art medium which is readily moldable, has substantially the same feel as clay, can provide aesthetic exterior surfaces without additional processing steps, can be worked by standard metal working tools, such as drills, etc. and results in a metal end product. Briefly, the above is accomplished by homogeneously mixing together a powdered metal which is sinterable and a plasticizer. This composition is mixed together with a liquid, preferably water in sufficient quanti...

In a medium for electrophoresis suitably employable for determination of base sequence of DNA, RNA, their fragments, and their derivatives, which comprises an aqueous polyacrylamide gel formed by crosslinking polymerization of an acrylamide compound and a crosslinking agent in the presence of water and at least one compound having a carbamoyl group, the improvement wherein glycerol is contained in the medium in a small amount ranging from 0.1 to 1.0 wt/v %.

A filter medium comprising first and second filter mediums joined together. The first filter medium provides relatively large voids and has high porosity, while the second filter medium provides relatively small voids and has low porosity. Raw water is mainly introduced into the first filter medium, and water branching therefrom flows through the second filter medium, at which biological filtering is conducted by aerobic microorganisms breeding therein.

A recording medium for recording with aqueous ink without direct contact of recording means therewith comprises an under layer and an upper layer provided thereon. The upper layer is formed of substantially water-resistant resin and is sufficiently thin to provide immediate water and air permeability and the under layer is more hydrophilic than the upper layer. There is also provided a recording process employing aqueous ink droplets and a recording medium as mentioned above.

There is provided a two part medium for use in double contrast radiography. A first part contains a radiopaque substance for example barium sulphate. A second part is radiolucent. The first part contains a reactant for example Carboxy Methyl Cellulose) which reacts with a component of the second part (for example polyvinyl pyrolidone on contact between the parts to form a compound or complex which inhibits migration of the radiopaque substance into the radiolucent part.

This invention relates to a recording medium in which a transition metal oxide showing photochromism is used as the recording layer and the said recording layer or an upper layer adjacent to the recording layer is made to carry a proton donor. This recording medium makes it possible to improve the change efficiency of optical density change produced by optical writing.