Kao Corporation

Junko Ishikawa

Katsumi Sasaki

Noriyuki Kitaori

Osamu Yoshida

Katsumi Endo

Yoshiya Sugai

Shotaro Ito

Yoshie Shimotoyodome

Hiroshi Hashimoto

Yukihiro Ohashi

Taketoshi Fujimori

Kazuhiko Higuchi

Takashi Kitahara

Yutaka Takagi

Akiko Kawasaki

Tomoko Nomura

Naoki Oya

Shino Mitsunaga

Katsumi Endho

Shi Chen

To provide a method for quickly and accurately evaluating a condition of skin dryness and a method for efficiently searching a substance to improve dry skin. A method for evaluating a condition of skin dryness, the method comprising measuring the expression levels of AGR2 and/or AGR3 in skin cells collected from subjects.

Method for evaluating condition of skin dryness

A transglutaminase activator containing at least one kind selected from the group consisting of an extract from, an extract from, and a compound represented by Formula (1), as an active ingredient: 

Transglutaminase activator

A ceramide production enhancer and a moisturizer containing, as an active ingredient, an extract of at least one plant selected from the group consisting of, and, or a compound represented by the following Formula (1): 

Ceramide production enhancer and moisturizer

This invention relates to a food containing a glycosylated ceramide and diacylglycerol. This food is capable of improving and enhancing the barrier function of skin and increasing water holding capacity of the skin.

Food for skin moisture retention

The invention relates to an amine derivative represented by the general formula (1):

Amine derivatives and skin preparations for external use containing the same

The present invention is a magnetic recording medium comprising a substrate and a magnetic layer, wherein said magnetic layer is coated on said substrate, said magnetic layer is an Fe--N--O magnetic layer, each of Fe content F.sub.1, N content N.sub.1 and O content O.sub.1 contained in said Fe--N--O magnetic layer satisfies respective requirements F.sub.1 =50-80 at. %, N.sub.1 =9-25 at. %, O.sub.1 =11-36 at. % and N.sub.1 &lt;O.sub.1, and said magnetic layer exhibits a coercive force Hc in a horizontal direction ranging from 1200 to 2400 Oe. This magnetic recording medium exhibits excelleny C/N.

Magnetic recording medium

A magnetic recording medium comprising a substrate, a magnetic layer, a protective layer and a lubricant layer, wherein the magnetic layer is coated on the substrate, the protective layer is coated on the magnetic layer, the lubricant layer is coated on the protective layer, the magnetic layer is an Fe--C--O metal magnetic layer containing Fe, C and O, the protective layer is a diamond-like carbon layer and the lubricant is a fluorine-contained lubricant. The magnetic recording medium using an inexpensive Fe as a magnetic material, has excellent electromagnetic conversion characteristic, durability, corrosion resistance and running capability.

A magnetic recording medium comprising a substrate and a magnetic layer, wherein the magnetic layer is an Fe--N--O magnetic layer, and a distribution of N density in a depth direction of said Fe--N--O magnetic layer has a maximum value N1 in an intermediate layer section of said Fe--N--O magnetic layer, and the maximum value N1 ranges from 20 to 50 at. %, and an area where a density value is equal to or more than half of said maximum value N1 ranges from 100 to 500 .ANG. in a depth direction of said Fe--N--O magnetic layer. The magnetic recording medium has an excellent C/N.

A magnetic recording medium comprising a substrate and a magnetic layer, wherein the magnetic layer is coated on the substrate, the magnetic layer is an Fe--C--O magnetic layer and has a oblique column structure, and an O concentration (at. %) Oc in a center part of the column and an O concentration (at. %) Os around a surface part of the column satisfy Oc&lt;Os. The magnetic recording medium has an excellent S/N, and has excellent corrosion resistance and durability.

A magnetic recording medium is disclosed which comprises a support having thereon a thin magnetic metal film comprising columns of magnetic metal grains grown obliquely, wherein each of said columns is bent having a curvature rate of 10% or more.

In order to improve a corrosion resistance and a running stability of a magnetic recording medium having a protective layer comprising a diamond-like carbon thin film and reduce cupping, the protective layer formed on the magnetic layer is composed of the diamond-like carbon thin film containing a material which fluoresces.

Growing community of inventors

Utsunomiya, Japan

Junko Ishikawa