Abstract: An optical apparatus includes a light emitting apparatus and a host apparatus. The light emitting apparatus includes a housing extending in a first direction, a light emitting device mounted in the housing, an optical connector including a first optical connection part provided at one end of the housing, and an electrical connector including a first electrical connection part provided at one end of the housing and receiving a voltage to drive the light emitting device. The host apparatus includes a host optical connector including a second optical connection part which faces the first optical connection part and is optically coupled thereto, a host electrical connector including a second electrical connection part facing the first electrical connection part and being electrically connected to the first electrical connection part, and a host board mounting the host optical connector and the host electrical connector thereon.

Abstract: The invention provides a composition capable of exerting an excellent whitening effect and imparting gloss to teeth. A method for removing a solid product formed on surfaces of teeth, the method containing applying an oral composition to teeth, wherein the oral composition contains 0.05 to 18% by weight of phytic acid or a salt thereof, and contains no polyvalent cation or contains a polyvalent cation in an amount of less than 0.1 fold mol relative to phytic acid, and wherein the oral composition, as diluted with water to 30% by weight, has a pH of 5.5 to 6.5.

Abstract: The invention provides a composition capable of exerting an excellent whitening effect and imparting gloss to teeth. A method for removing a solid product formed on surfaces of teeth, the method containing applying an oral composition to teeth, wherein the oral composition contains 0.05 to 18% by weight of phytic acid or a salt thereof, and contains no polyvalent cation or contains a polyvalent cation in an amount of less than 0.1 fold mol relative to phytic acid, and wherein the oral composition, as diluted with water to 30% by weight, has a pH of 5.5 to 6.5.

Abstract: The present invention relates to a process for producing an anode for a secondary battery, which is capable to reduce a contact resistance between a sintered material which contains silicon as an anode active material and a current collector. A binder and a solvent are mixed with a silicon-containing anode material to prepare a slurry. A base material made of a foil or mesh of conductive metal is coated with the slurry, and the solvent is removed to form a coated film. The coated film is sintered in a non-oxidizing atmosphere, thereby integrating a sintered material of the coated film with the base material.

Abstract: The present invention relates to a lithium secondary battery with a cathode and an anode, each electrode containing an active material capable of incorporating and releasing lithium ions. The anode includes a sintered material which contains 50 to 99 % by weight of silicon and 1 to 50% by weight of carbon material, and has an electrical conductivity not less than 1 S/cm. By employing the anode including the sintered material containing silicon as the anode active material and carbon material, an increased packing density of the active material and an increased capacity per volume can be obtained. Furthermore, the anode conductivity of not less than 1S/cm can provide a high capacity and improved cycle property.

Abstract: Disclosed is an electrode material for secondary battery, wherein the discharge capacity is large and the change in potential during the charge/discharge is small. A carbonaceous material, wherein a value of R (degree of raphitization ), which is defined as a ratio of a Raman spectrum intensity at 1580 cm−1 to a Raman spectrum intensity at 1360 cm−1 in the Raman spectrum analysis, is not more than 4.0 and a length of crystallite (Lc) oriented along a crysatllographic c axis obtained by a wide angle X-ray diffraction method is from 25 to 35 nm, of the electrode material is obtained by calcining a material, which can be carbonized by a heat treatment, in the presence of boron nitride or silicon.

Abstract: The present invention relates to a negative electrode material having a great discharge capacity. A non-aqueous secondary battery essentially comprises positive and negative electrodes, the negative electrode material including a negative electrode material containing 30 to 90% by weight of silicon and 10 to 70% by weight of carbon for the non-aqueous secondary battery, wherein the negative electrode material is obtained by heating silicon or a compound thereof at 600 to 1,500° C. under a non-oxidative atmosphere in the coexsitence with an organic material carbon material.