1. A composition for skin external application containing a Chamaecyparis obtuse polysaccharide extract having a molecular weight of at least 100,000 Daltons, devoid of (i) chlorophyll and (ii)) proteins having a molecular weight of below 1,000 Da.
2. The composition of claim 1, wherein the Chamaecyparis obtuse polysaccharide extract is present in an amount of 0.001-10 wt % based on the total weight of the composition.
3. The composition of claim 1, wherein the composition is for anti-aging.
4. The composition of claim 1, wherein the composition is for reducing skin wrinkles.
5. The composition of claim 1, wherein the composition is for improving skin elasticity.
6. The composition of claim 1, wherein the composition is for skin whitening.
7. The composition of claim 1, wherein the composition is for skin moisturization.
8. The composition of claim 1, wherein the composition is for amelioration of dry skin diseases.
9. The composition of claim 1, wherein the composition is for anti-inflammation.
10. The composition of claim 1, wherein the composition is for promoting skin regeneration.
11. The composition of claim 1, wherein the Chamaecyparis obtuse polysaccharide extract is prepared by:
a) removing chlorophyll from dried Chamaecyparis obtusa leaves using a solvent;
b) hot-water extracting water-soluble active ingredients from the leaf residue of step a); and
c) separating the polysaccharides of Chamaecyparis obtusa from the hot-water extract of step b) by ultra-filtration and ethanol precipitation.
12. A method of combating aging, reducing skin wrinkles, improving skin elasticity, skin whitening, skin moisturization, ameliorating dry skin diseases, treating inflammation, or promoting skin regeneration comprising transdermally applying to a subject in need of an effective amount of a Chamaecyparis obtuse polysaccharide extract having a molecular weight of at least 100,000 Daltons, devoid of (i) chlorophyll and (ii) proteins having a molecular weight of below 1,000 Da.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A dynamic microphone comprising:
a dynamic microphone unit including a diaphragm including a voice coil and a magnetic circuit including a magnetic gap, the voice coil being disposed in the magnetic gap so as to vibrate;
a bottomed case coupled to the dynamic microphone unit and forming a back-side air chamber communicating with back side of the diaphragm; and
an acoustic resistance body formed of metal fiber including a pocket and attached to the inside of the case, the pocket being formed to have an open cross sectional area gradually decreasing toward a direction remote from the dynamic microphone unit.
2. The dynamic microphone according to claim 1, wherein the metal fiber is aluminum fiber.
3. The dynamic microphone according to claim 1 further comprising a plurality of pockets, each of the pockets being formed to have an open cross sectional area gradually decreasing toward a direction remote from the dynamic microphone unit.
4. The dynamic microphone according to claim 2 further comprising a plurality of pockets, each of the pockets being formed to have an open cross sectional area gradually decreasing toward a direction remote from the dynamic microphone unit.
5. The dynamic microphone according to claim 1, wherein the metal fiber pressingly attached to the inside of the case is in tight contact with an internal surface of the case.
6. The dynamic microphone according to claim 2, wherein the metal fiber pressingly attached to the inside of the case is in tight contact with an internal surface of the case.
7. The dynamic microphone according to claim 3, wherein the metal fiber pressingly attached to the inside of the case is in tight contact with an internal surface of the case.
8. The dynamic microphone according to claim 4, wherein the metal fiber pressingly attached to the inside of the case is in tight contact with an internal surface of the case.
9. The dynamic microphone according to claim 1, wherein the case forming the back-side air chamber is a grip case configured to support the microphone unit.
10. The dynamic microphone according to claim 1, wherein the case forming the back-side air chamber is contained in a grip case configured to support the microphone unit.
11. The dynamic microphone according to claim 10, wherein the case is coaxially attached inside the grip case via a shock-mount member.
12. The dynamic microphone according to claim 1, wherein, the acoustic resistance body has fiber density distribution such that fiber density is low in a portion close to an opening of the case and high in a portion close to a bottom of the case.
13. A method of forming a back-side air chamber communicating with backside of a diaphragm of a dynamic microphone unit, the method comprising:
inserting a certain amount of metal fiber in a bottomed case having an opening which communicates with the back side of the diaphragm;
forming a pocket in the metal fiber in the case by plastic deformation by inserting a rod member having a protrusion of which outer diameter decreases toward distal end, from the opening of the case, the pocket being formed in a shape corresponding to a shape of the protrusion of the rod member; and
pulling out the rod member from the opening of the case to obtain an acoustic resistance body formed of metal fiber having a pocket in an internal bottom section of the case, the pocket having a gradually decreasing open cross sectional area to form the back-side air chamber.
14. The method of forming a back-side air chamber according to claim 13, wherein the metal fiber comes in tight contact with an internal surface of the case by the forming, by plastic deformation, of a pocket having a shape corresponding to a shape of the protrusion of the rod member in the metal fiber.
15. The method of forming a back-side air chamber according to claim 13, wherein aluminum fiber is used as the metal fiber.
16. The method of forming a back-side air chamber according to claim 14, wherein aluminum fiber is used as the metal fiber.