Sekisui Medical Co., Ltd.

Olympus Corporation

Asahi Glass Company, Limited

Agc Inc.

Kenta Saito

Shinya Yano

Hideki Kubota

Daisuke Kobayashi

Akio Koike

Shinya Kikugawa

Shinichi Takimoto

Yasutomi Iwahashi

Takeharu Nagai

Long Shao

Masahito Yamanaka

Katsumasa Fujita

Provided is an alkyldiphenylmethane protective agent, which can prevent solidification or insolubilization of a compound by protecting a functional group of the compound to achieve easy separation and purification after a reaction. An alkyldiphenylmethane compound represented by general formula (1):  

Alkyldiphenylmethane protective agent

Provided is an alkyldiphenylmethane protective agent, which can prevent solidification or insolubilization of a compound by protecting a functional group of the compound to achieve easy separation and purification after a reaction. An alkyldiphenylmethane compound represented by general formula (1):   

The present invention relates to an alkali-free glass substrate, having a difference &#x394;n between the maximum value and the minimum value of a refractive index at a cross-section of a glass sheet of 0.40&#xd7;10or less. According to the alkali-free glass substrate of the present invention, the polishing ability can be extremely improved and the polishing time is shortened, so that the production efficiency can be improved.

Alkali-free glass substrate

A fluorescence observation method of the present invention for detecting plural types of fluorescence emitted from two or more kinds of fluorescent molecules includes: subjecting each of the two or more kinds of fluorescent molecules to multi-photon excitation by exciting light having an exciting wavelength equal to or shorter than 700 nm in a visible region, to generate fluorescence upon making use of an absorption wavelength band in a deep ultraviolet region of each of the two or more kinds of fluorescent molecules; and simultaneously detecting plural types of fluorescence generated on a shorter-wavelength side or on both of the shorter-wavelength side and a longer-wavelength side of the exciting wavelength of the exciting light.

Fluorescence observation method and fluorescence observation apparatus

The present invention provides a TiO&#x2014;SiOglass whose coefficient of linear thermal expansion in the range of the time of irradiation with EUV light is substantially zero when used as an optical member of an exposure tool for EUVL and which has extremely high surface smoothness. The present invention relates to a TiO-containing silica glass having a TiOcontent of from 7.5 to 12% by mass, a temperature at which a coefficient of linear thermal expansion is 0 ppb/&#xb0; C., falling within the range of from 40 to 110&#xb0; C., and a standard deviation (&#x3c3;) of a stress level of striae of 0.03 MPa or lower within an area of 30 mm&#xd7;30 mm in at least one plane.

[object Object]

Growing community of inventors

Tokyo, Japan

Kenta Saito