摘要:
Adjuvants for preventing adaptation to odors comprising one or compounds having the following formula (1): ##STR1## wherein R1 is a C1 to C8 lower alkyl group or a C7 to C9 aralkyl group, and R2 is a hydrogen atom or a C1 to C8 lower alkyl group, are described, as are compositions containing the same, and methods for preventing the adaptation to odors. Methods for increasing intracellular calcium ion levels and for prolonging the sensory response of chemoreceptive cells also described.
摘要:
A fragrance composition which contains 1,3-dimethoxy-5-methylbenzene in an amount of from 0.01 to 30% by weight as a fragrance modifier that provides a sedative effect. 1,3-Dimethoxy-5-methylbenzene used in the present invention can exhibit a sedative effect not only by itself but also when mixed with various formulations of jasmine, floral and the like types having stimulative effects. Also, since a single chemical is used as an active ingredient, the present invention is more effective than the sedative function of natural essential oil from a viewpoint of sedation. In addition, since 1,3-dimethoxy-5-methylbenzene itself has a mild scent, its sedative effect can be obtained without altering original fragrance of interest.
摘要:
A method for manufacturing an optical element comprises a step of press molding an optical element material 6 disposed between an upper press head (7) and its paired lower press head (8), wherein in the upper press head (7) and/or the lower press head (8) is formed a groove-like component that forms a non-cylindrical face or a cylindrical face as an optically effective component in the optical element material (6). This makes it possible to obtain an optical element with stable face shape precision, boosts productivity, and is also advantageous in terms of cost.
摘要:
A method and an apparatus for producing an optical element capable of performing a molding temperature control required for a plurality of independent molding blocks in a short period of time, and continuously and simultaneously producing a plurality of different optical elements having a high degree of accuracy at a low cost is provided.
摘要:
A machine is provided for molding an optical element by using a molding block having upper and lower molding dies, a sleeve die and a glass blank combined integrally with each other. The machine includes a chamber which accommodates a heating zone having a plurality of sections for heating the molding block from above and below, a deformation zone for pressing the molding dies and a cooling zone having a plurality of sections for cooling the molding block. The chamber is formed with an inlet and an outlet for the molding block. The sections of the heating zone, the deformation zone and the sections of the cooling zone are provided independently of one another. A transport member is provided for sequentially transporting the molding block through the heating zone, the deformation zone and the cooling zone, and first and second shutters are provided for opening gas supply member is provided for introducing nonoxidizing gas into the chamber.
摘要:
A method for receiving molten steel from an electric furnace without using a ladle crane in tapping, comprising a ladle bogie on rails supporting thereon a ladle which can be tilted when receiving molten steel therein; a ladle preheating device installed at the position which does not interfere with molten steel receiving work of the ladle bogie; and an electric furnace having a short tapping trough for reducing the lowering of molten steel temperature while molten steel is being received.
摘要:
An optical glass composition contains, in % by mole, 14.0% or more and 31.0% or less of SiO2, 19.0% or more and 40.0% or less of B2O3, 0% or more and 5.0% or less of Li2O, 0% or more and 12.0% or less of ZnO, 0% or more and 12.0% or less of ZrO2, 15.0% or more and 26.0% or less of La2O3, 22.0% or more and 38.0% or less of La2O3+ZrO2, 2.0% or more and 5.0% or less of Ta2O5 and 4.0% or more and 16.0% or less of Gd2O3, and has nd of 1.83 or higher and 1.87 or lower and νd of 43 or higher and 47 or lower, and a preform and an optical element are formed from the optical glass composition.
摘要翻译:光学玻璃组合物含有SiO 2为14.0%以上且31.0%以下,B 2 O 3为19.0%以上且40.0%以下,Li 2 O 0%以上且5.0%以下,0%以下 更多和12.0%以下的ZnO,0%以上且12.0%以下的ZrO 2,15.0%以上且26.0%以下的La 2 O 3,22.0%以上且38.0%以下的La 2 O 3 + ZrO 2,2.0%或 更多和5.0%以下的Ta 2 O 5和4.0%以上且16.0%以下的Gd 2 O 3,nd为1.83以上且1.87以下,n为43以上且47以下,预成型体和 光学元件由光学玻璃组合物形成。
摘要:
An optical glass composition contains, in % by weight, 1.0% or more and 12.0% or less of SiO2, 8.0% or more and 18.0% or less of B2O3, 0% or more and 6.0% or less of ZnO, 1.0% or more and 10.0% or less of ZrO2, 25.0% or more and 47.0% or less of La2O3, 0% or more and 5.0% or less of R2O (here, R is at least one of Li, Na and K), 0% or more and 15.0% or less of Nb2O5, 0% or more and 7.0% or less of TiO2, 0% or more and 15.0% or less of Ta2O5, 1.0% or more of Nb2O5+TiO2+Ta2O5, 0% or more and 25.5% or less of Gd2O3, 0.5% or more and 15.0% or less of WO3 and 0.5% or more and 26.0% or less of Gd2O3+WO3, and has nd of 1.88 or higher and 1.92 or lower and νd of 33 or higher and 37 or lower, and a preform and an optical element are formed from the optical glass composition.
摘要翻译:光学玻璃组合物以重量%计含有SiO 2的1.0%以上且12.0%以下,B 2 O 8以上8.0%以上18.0%以下。 0%以上且6.0%以下的ZnO,1.0%以上且10.0%以下的ZrO 2,25.0%以上且47.0%以下,或者 少于2个O 2 O 3,0%以上且5.0%以下的R 2 O(这里,R为至少一个 Li,Na和K),0%以上且15.0%以下的Nb 2 O 5,0%以上且7.0%以下的TiO 2, 2%,0%以上且15.0%以下的Ta 2 O 5,1.0%以上的Nb 2 O 5%+ TiO 2 + Ta 2 O 5,0%以上至25.5%以下的Gd < 0≤N≤0.3%,0.5%以上且15.0%以下的WO 3和0.5%以上且26.0%以下的Gd
摘要:
A method of press-molding glass optical elements by press-molding glass, having a high melting point, at a temperature of 650.degree. C. and higher using a die for press-molding glass optical elements which includes a base material having a heat resistance and sufficient strength to withstand press-molding of optical glass elements, a cutting layer on the base material, and a surface protective layer on the cutting layer. The cutting layer is formed of an alloy film containing P and one metal selected from the group Ni, Co, and Fe, and one metal from the group Si, Ti, Cu, Zr, Nb, Mo, Ru, Rh, Pd, Hf, Ta, W, Re, Os, and Ir, or an alloy film containing Cu and 20 to 80 atom % of one metal selected from the group Ni, Co, Fe, Si, Ti, Zr, Nb, Mo, Ru, Rh, Pd, Hf, Ta, W, Re, Os, and Ir, or an alloy film containing Si and 20 to 80 atom % of one metal selected from the group Ni, Co, Fe, Cu, Ti, Zr, Nb, Mo, Ru, Rh, Pd, Hf, Ta, W, Re, Os, and Ir. The surface protective layer is formed of an alloy film of at least one metal selected from the group Pt, Pd, Ir, Rh, Os, Ru, Re, W, and Ta.
摘要:
A method of producing a glass blank, comprising the steps of: supplying a desired weight of molten glass material to a bearer heated to a temperature of not more than a softening point of the glass material; performing and cancelling, at a temperature of not less than the softening point, pressing of the glass material supplied to the bearer so as to adjust a thickness of the glass material; and cooling the glass material to a temperature of not more than the softening point.