Abstract: In an electrophotographic plate comprising a substrate and a photoconductive layer formed on said substrate, when said substrate is made of an age-hardening type aluminum alloy and has a Vickers hardness of 60 Hv or higher, there can be produced electrophotographic plates high in dimensional accuracy, good in resistance to mechanical damages and impact, and very small in eccentricity when molded in the form of a drum. When the surface hardness of the selenium photoconductive layer is made 5 H or harder in pencil hardness, the resulting electrophotographic plate is excellent in printing performance and has a long life.

Abstract: A complex type electrophotographic plate comprising an electroconductive support and a charge generating layer and a charge transport layer characterized in that the charge generating layer contains at least a copper phthalocyanine and the charge transport layer contains at least a trinitrofluorenone, has excellent photosensitivity and adhesion to the support.

Abstract: A complex type electrophotographic plate comprises a conductive support; a first layer, adhered to the support, of a charge generating material, said first layer having a thickness of 0.1 to 5 .mu.m; and a second layer, superposed on the first layer, of a homogeneous mixture of a charge transport material and an insulating, resinous binder therefor, said second layer having a thickness of 5 to 100 .mu.m and being substantially transparent to light of a wave length of 4200 to 8000 A; wherein said charge transport material is at least one member selected from the class consisting of nonionic compounds represented by the general formula: X--(CH.dbd.CH).sub.n Ar where X is a heterocyclic group selected from the group consisting of ##STR1## and Y is O or S, R is a lower alkyl group; the hetero ring may be substituted; n is an integer of 0, 1 or 2; and Ar is an aryl or substituted aryl group.The electrophotographic plate has a high light sensitivity and can be used in more than 10.sup.3 repetitions without fatigue.

Abstract: The present invention relates to certain novel 4-N-substituted derivatives of the antibiotic Fortimicin B and processes for production thereof. Included in the process aspect of the invention, is a novel method for the semi-synthetic production of the antibiotic Fortimicin C.

Abstract: An ink for an ink-jet printer having a specific resistance of 1 k.OMEGA.-cm or less and comprising (1) as an organic solvent in a vehicle (a) dichloromethane or (b) a mixed solvent of dichloromethane and at least one member selected from halogenated lower alkanes except for dichloromethane and halogenated lower alkenes and (2) as a coloring agent (a) a basic dye or (b) a mixture of a basic dye and at least one selected from oil-soluble dyes and organic pigments can ink-jet print letters, symbols, etc. on a hydrophobic substrate.

Abstract: Semisynthetic antibacterial compounds are produced by chemically modifying the antibacterial compound fortimicin A.

Abstract: Semisynthetic antibacterial compounds are produced by chemically modifying the antibacterial compound fortimicin A.

Abstract: Semisynthetic antibacterial compounds are produced by chemically modifying the antibacterial compound fortimicin B.

Abstract: The present invention relates to certain novel 4-N-substituted derivatives of the antibiotic Fortimicin B and processes for production thereof. Included in the process aspect of the invention, is a novel method for the semi-synthetic production of the antibiotic Fortimicin C.

Abstract: A new biologically active substance, 1-HABA-seldomycin-5, is produced by chemically modifying the antibiotic XK-88-5. The composition of matter is useful as an antibacterial agent.

Abstract: New 3"-N-demethyl- and 3"-N, 6'-N-didemethyl-1-.alpha.-hydroxy-.omega.-aminoacyl derivatives of the antibiotic XK-62-2, their pharmaceutically-acceptable acid addition salts, and a process for preparing the same are disclosed.

Abstract: A one-component magnetic developer powder for developing an electrostatic latent image formed according to an electrophotographic process comprising non-agglomerative essentially spherical members consisting essentially of plastics binder, magnetic particles and first electric conductive particles dispersed therein, and second electric conductive particles embedded on a spherical surface of the member, the resistivity of the surface layer of the powder being less than that of the inner portion.The developer powder according to the present invention has a good electrical uniformity and the flowability of the developer powder is very good. Productivity of the same is also very good.

Abstract: A new compound which is useful as an antibacterial agent or a synthetic intermediate thereof and has the general formula: ##STR1## (wherein R is hydrogen, benzyloxycarbonyl or t-butyloxycarbonyl) is produced by reacting the compound XK-88-5 with an urethane-type amino-protecting reagent.

Abstract: 6'-N-methylfortimicin D and 6'-N-methylfortimicin KE are produced by chemically moidifying fortimicin KE. 6'-N-methylfortimicin D is useful as an antibacterial compound; and 6'-N-methylfortimicin KE is useful as an intermediate in the synthesis of the former compound.

Abstract: A liquid developer for electro photography which comprises a coloring agent, a coating agent, a resistivity controlling agent and a carrier liquid which disperses or dissolves the said three agents is suitable for providing high reproducibility of images when at least one of the following copolymers are used as said coating agent:(a) Copolymer of an acrylic acid compound represented by the following general formula (i) and a para-alkylstyrene represented by the following general formula (ii): ##STR1## (WHEREIN R.sub.1 is hydrogen or an alkyl group of 1-6 carbon atoms and R.sub.2 is hydrogen or C.sub.m H.sub.p X.sub.q wherein m=1-6 and p+q=2m+1 or p+q=m-1 and X is a halogen, amino group, secondary or tertiary amino group having an alkyl group of 1-4 carbon atoms, nitro group, cyano group or hydroxyl group) ##STR2## (WHEREIN R.sub.3 is an alkyl group of 2-18 carbon atoms).

Abstract: A new antibiotic, 2'-deamino-3'-epiamino-3'-deoxy-XK-88-5 represented by the formula: ##STR1## is produced by chemically modifying the antibiotic XK-88-5 represented by the formula: ##STR2##

Abstract: 1-N-(.alpha.-Hydroxy-.beta.-aminopropionyl) XK-62-2 is produced by chemically modifying the antibiotic XK-62-2 to introduce an .beta.-hydroxy-.beta.-aminopropionyl group to the amino group bonded to the carbon atom at the 1-position. The derivative is useful as an antibacterial agent.

Abstract: Organic photoconductive materials comprising as an active ingredient a photoconductive copolymer consisting of 3 to 50 mole % of at least one acrylic monomer represented by the formula ##STR1## wherein R.sub.1 is hydrogen or methyl; and R.sub.2 is a group of the formula --C.sub.n H.sub.2n+1 or a group of the formula --CH.sub.2).sub.m X [wherein n is an integer of 0 to 18; m is an integer of 1 to 4; and X is a group of the formula --OR.sub.3 or ##STR2## (wherein R.sub.3 is a group of the formula --C.sub.l H.sub.2l+1 ; and l is an integer of 0 to 4)], and 97 to 50 mole % of a photoconductive monomer having an .alpha.,.beta.-unsaturated bond.

Abstract: New 3"-N-demethyl- and 3"-N, 6'-N-didemethyl-1-.alpha.-hydroxy-.omega.-aminoacyl derivatives of the antibiotic XK-62-2, their pharmaceutically-acceptable acid addition salts, and a process for preparing the same are disclosed.

Abstract: A new antibiotic, Fortimicin C, is produced by fermentation of a microorganism belonging to the genus Micromonospora. The antibiotic is accumulated in the culture medium and is isolated therefrom.