Abstract: Provided is a growing medium for plants, including a substrate having voids, and a magnetized magnetic particle dispersedly carried by the substrate.

Abstract: Provided are a seed including a magnetized magnetic particle having a coercive force of 40 kA/m or higher on a surface of the seed, and a method for growing plants, including sowing this seed in soil or a growing medium for plants.

Abstract: A magnetic sheet for plant cultivation includes: a base material; and a magnetic layer which is arranged on the base material and includes a resin and at least one selected from the group consisting of a ferromagnetic powder and a ferrimagnetic powder, wherein a product of residual magnetization and layer thickness of the magnetic layer is 20 mA or higher.

Abstract: An object is to provide a leader tape which suppresses the increase of dropout resulting from imprinting of the drive reel or leader block part due to storage for a long time or running at a high temperature and hardly causes the edge damage of a magnetic tape, and also provide a magnetic tape cartridge using the leader tape. 1) A leader tape comprising a support having provided on at least one surface thereof a coating layer comprising a powder material and a binder, wherein the center line average roughness (Ra) on at least one surface of the leader tape is from 10 to 60 nm and the friction coefficient against an Al2O3/TiC member is from 0.1 to 0.

Abstract: A method for reproducing information recorded on a magnetic recording medium comprising, in the following order, a non-magnetic flexible support, a non-magnetic lower layer containing non-magnetic powder and a binder, and a magnetic layer containing ferromagnetic powder, a binder and an abrasive, the magnetic layer having an average thickness of 30 to 150 nm, a density of projections having a height of 10 nm or more of 2,000 to 10,000 per 100 ?m2 as measured by atomic force microscopy, and a scratch depth of 50 to 200 nm, the method comprising reading the magnetic recording medium with a magnetoresistive head having a magnetoresistive element, the magnetoresistive element being recessed 20 nm or less from a plane of contact with the magnetic recording medium.

Abstract: A magnetic recording tape comprising a magnetic layer, a flexible support and a back coat layer in this order, wherein the support is a polyester film having an intrinsic viscosity of from 0.40 to 0.60 dl/g and a number average molecular weight of from 12,000 to 24,000, a surface of the back coat layer has protrusions having a height of 100 nm or more measured with an atomic force microscope in a density of from 10 to 500 in 90 ?m square, and a ratio of a total number of protrusions having a height of 50 nm or more on the surface of the back coat layer to a total number of protrusions having a height of 100 nm or more on the surface of the back coat layer is from 10 to 100.

Abstract: A leader tape comprising a support and a coating layer containing a powder and a binder, wherein at least one surface of the leader tape has a center line average roughness (Ra) of from 10 to 60 nm, and the leader tape has a cupping of from 0 to 1 mm per a width of ½ inch.

Abstract: An object is to provide a leader tape which suppresses the increase of dropout resulting from imprinting of the drive reel or leader block part due to storage for a long time or running at a high temperature and hardly causes the edge damage of a magnetic tape, and also provide a magnetic tape cartridge using the leader tape. 1) A leader tape LT including a support having provided on at least one surface thereof a coating layer, wherein Ra on at least one surface of the leader tape is from 10 to 60 nm and the maximum curving amount in the longitudinal direction is 3 mm/m or less; and 2) a magnetic tape cartridge including a cartridge case; and a single reel or a plurality of reels, each reel being rotatably housed in the cartridge case and having a magnetic tape wound therearound, in which the magnetic tape has a leader tape of 1), the leader tape being jointed to an leading end of the magnetic tape and drawn out into a magnetic recording and reproducing apparatus while leading the magnetic tape.

Abstract: A magnetic recording medium having a magnetic layer containing magnetic powder provided on a support is disclosed. The magnetic layer possesses a servo band in which a servo signal for controlling tracking of a magnetic head, and a data band on which a data is recorded. The servo signal is magnetized and recorded on the servo band, having been magnetized in one direction of the track direction thereof, in the direction other than the one direction. The thickness of the magnetic layer ranging from 10 to 180 ?m, and variation [standard deviation of Mrt] of the product [Mrt] of the residual magnetism by the thickness of the magnetic field being not more than 30%.

Abstract: A cleaning tape for a magneto-resistive head including a support and a cleaning layer containing powder and a binder, the cleaning layer being adapted to be brought into contact with the magneto-resistive head, the cleaning layer having a centerline average surface roughness Ra of 10 to 60 nm, and the cleaning tape having an absolute value of curvature of 3.0 mm or less for a length of 1 m.

Abstract: A magnetic recording and reproducing system, including recording a signal on a magnetic recording medium by an inductive head and reproducing the signal by a magneto resistance head. The gap length of the inductive head is 0.3 ?m or less. The maximum particle diameter of ferromagnetic powder is from 1/10 to ½ of the gap length, the minimum particle diameter of the powder is from 1/100 to ? of the gap length, and the thickness of a magnetic layer is from 1/10 to ½ of the gap length. The average particle size of the powder is from 10 to 35 nm, the tabular ratio is from 2 to 6, the squareness ratio of in-plane of the magnetic layer is from 0.5 to 0.9 in the longitudinal direction, and from 0.2 to 0.6 in the thickness direction, and the thickness of the magnetic layer is from 0.01 to 0.2 ?m.

Abstract: An information recording tape including a data-recording area and a non-data-recording area, with the data-recording area having a center-line average surface roughness Ra smaller than 3 nm and at most 100/mm2 of protuberances standing at least 20 nm high, and with the non-data-recording area having a center-line average surface roughness Ra greater than 2 nm and more than 100/mm2 of protuberances standing at least 20 nm high.

Abstract: A leader tape comprising a support and a coating layer containing a powder and a binder, wherein at least one surface of the leader tape has a center line average roughness (Ra) of from 10 to 60 nm, and the leader tape has a cupping of from 0 to 1 mm per a width of ½ inch.

Abstract: A leader tape comprising a support and a coating layer containing powder and a binder, wherein at least one surface of the leader tape has a center line average roughness (Ra) of from 10 to 60 nm, and the leader tape has a coefficient of thermal expansion in a transverse direction of not more than 20 ppm/° C., a coefficient of thermal expansion in a machine direction of not more than 20 ppm/°C., a coefficient of humidity expansion in a transverse direction of not more than 20 ppm/% RH, and a coefficient of humidity expansion in a machine direction of not more than 20 ppm/% RH.

Abstract: A magnetic recording medium comprising a flexible nonmagnetic support and a magnetic layer containing ferromagnetic alloy powder and a binder, wherein the magnetic layer has an average thickness of from 0.03 to 0.2 ?m, the ferromagnetic alloy powder has an average long axis length of from 10 to 65 nm, the magnetic layer has a coercive force in a recording direction of from 180 to 290 kA/m, and a product of the coercive force and a switching field distribution in the recording direction of the magnetic layer is from 30 to 130 kA/m.

Abstract: A magnetic recording tape comprising a magnetic layer, a flexible support and a back coat layer in this order, wherein the support is a polyester film having an intrinsic viscosity of from 0.40 to 0.60 dl/g and a number average molecular weight of from 12,000 to 24,000, a surface of the back coat layer has protrusions having a height of 100 nm or more measured with an atomic force microscope in a density of from 10 to 500 in 90 ?m square, and a ratio of a total number of protrusions having a height of 50 nm or more on the surface of the back coat layer to a total number of protrusions having a height of 100 nm or more on the surface of the back coat layer is from 10 to 100.

Abstract: Provided is a particulate magnetic recording medium having good durability and a high C/N ratio in high-density magnetic recording (particularly when employing an MR head for reproduction). A magnetic recording medium which comprises a lower layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder, an abrasive and a binder provided in this order on a nonmagnetic flexible support. The magnetic layer has a mean thickness d ranging from 0.01 to 0.1 ?m, the ferromagnetic powder contained in the magnetic layer is an acicular ferromagnetic alloy powder having the mean major axis length equal to or less than 0.1 ?m and the saturation magnetization ?s equal to or less than 120 A·m2/kg, and the number of abrasive protrusions ranging in height from 5 to 10 nm on the surface of the magnetic layer ranges from 15 to 25/225 ?m2.

Abstract: A magnetic tape is disclosed, comprising a support having thereon a magnetic layer comprising ferromagnetic particles and a binder as the main components, (i) the magnetic tape being for use in a magnetic recording/reproducing system in which signals recorded are reproduced with a magneto resistive head, (ii) the ferromagnetic particles contained in the magnetic layer being hexagonal-ferrite magnetic particles having an average tabular diameter of from 10 to 40 nm, and the magnetic layer having a machine direction coercive force Hc of from 158 to 350 kA/m, a squareness ratio SQ? as measured in the direction perpendicular to the magnetic plane of 0.5 or lower, and a thickness of from 30 to 300 nm.

Abstract: A method for reproducing information recorded on a magnetic recording medium comprising, in the following order, a non-magnetic flexible support, a non-magnetic lower layer containing non-magnetic powder and a binder, and a magnetic layer containing ferromagnetic powder, a binder and an abrasive, the magnetic layer having an average thickness of 30 to 150 nm, a density of projections having a height of 10 nm or more of 2,000 to 10,000 per 100 ?m2 as measured by atomic force microscopy, and a scratch depth of 50 to 200 nm, the method comprising reading the magnetic recording medium with a magnetoresistive head having a magnetoresistive element, the magnetoresistive element being recessed 20 nm or less from a plane of contact with the magnetic recording medium.

Abstract: A magnetic recording medium comprising a magnetic layer, a flexible support and a back coat layer in this order, wherein a density of spines on the back coat layer having a height of 100 nm or more measured with an atomic force microscope is from 50 to 200 in 90 &mgr;m square, and a thermal shrinkage factor in a machine direction after preservation at 70° C. 5% RH for 48 hours is 0.4% or less.